CN112309321B - Display control method and device and storage medium - Google Patents

Abstract

The present disclosure relates to a display control method, device, and storage medium. The method includes: determining whether a target brightness is equal to a predetermined brightness, wherein the predetermined brightness is a display brightness that can be achieved by a display component based on a dimming mode; when the target brightness is not equal to a predetermined brightness In the case of brightness, the first display object to be displayed is converted into a second display object according to the target brightness and the predetermined brightness, wherein the display contents of the first display object and the second display object are the same; and displaying the second display object at a predetermined brightness, wherein the visual brightness of the display component displaying the first display object at a predetermined brightness is different from the visual brightness of the display component displaying the second display object at the predetermined brightness. Through the technical solution of the present disclosure, when the display module cannot reach the target brightness in the specified dimming mode, the display module can achieve the brightness to adjust the brightness, and display the converted object, so as to achieve the vision corresponding to the target brightness. Effect.

Description

Display control method and device, and storage medium

technical field

The present disclosure relates to display technology, and in particular, to a display control method and device, and a storage medium.

Background technique

The display screen needs different display brightness in different usage environments. For LCD (Liquid Crystal Display, liquid crystal display), the display brightness can be adjusted directly by adjusting the brightness of the backlight; for OLED (Organic Light-Emitting Diode) without backlight , organic light-emitting diode) display screen, it is necessary to adjust the brightness of the display by adjusting the luminous intensity of the light-emitting diode.

In the related art, there are mainly two ways to adjust the brightness of pixels in the display screen: DC (Direct Current, direct current) dimming and PWM (Pulse Width Modulation, pulse width modulation) dimming. Since DC dimming does not have high-frequency flicker, it can achieve the effect of eye protection, but this method is only suitable for high-brightness display images. For low-brightness display images, it is easy to produce Mura (image uneven color). PWM dimming can solve the problem of uneven picture, and it is easy to control through the driving circuit, but this method uses high-frequency AC signal, which is difficult to meet the requirements of eye protection.

In the related art, the display screen is dimmed by combining two dimming modes, so as to ensure the color uniformity of the displayed image as much as possible, and at the same time protect the eyes of the user. However, if it needs to support two dimming modes, the display screen needs to be equipped with driving circuits corresponding to the two dimming modes, so the driving structure of the display screen is complicated and the hardware cost is high.

SUMMARY OF THE INVENTION

The present disclosure provides a display control method and device, and a storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a display control method, the method comprising:

determining whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that the display component can achieve based on the dimming mode;

When the target brightness is not equal to the predetermined brightness, the first display object to be displayed is converted into a second display object according to the target brightness and the predetermined brightness, wherein the first display object and the The display content of the second display object is the same;

The display component is dimmed to the predetermined brightness based on the dimming mode to display the second display object, wherein the display component displays the visual brightness of the first display object at the predetermined brightness, which is different from the visual brightness of the first display object. The display component displays the visual brightness of the second display object at the predetermined brightness.

In the above solution, when the target brightness is not equal to the predetermined brightness, converting the first display object to be displayed into the second display object according to the target brightness and the predetermined brightness includes:

When the target brightness is not equal to the predetermined brightness, determining a conversion coefficient according to the target brightness and the predetermined brightness;

The first display object is converted into a second display object according to the conversion coefficient.

In the above solution, converting the first display object into a second display object according to the conversion coefficient includes:

determining the first display data corresponding to the first display object;

determining second display data according to the conversion coefficient and the first display data;

The second display object is determined according to the second display data.

In the above solution, the first display data and the second display data are display data in a first grayscale mode; the display component dims light to the predetermined brightness based on the light adjustment mode, and displays the The second display object, including:

According to the second display data, the output display data in the second grayscale mode is determined; wherein, the total grayscale number in the first grayscale mode is higher than the total grayscale in the second grayscale mode number;

According to the output display data, a corresponding driving voltage is provided based on the dimming mode;

The display component displays the second display object according to the driving voltage.

In the above solution, converting the first display object into a second display object according to the conversion coefficient includes:

generating a mask layer according to the conversion coefficient;

The mask layer is superimposed on the first display object to obtain the second display object.

In the above solution, the determining whether the target brightness is equal to the predetermined brightness of the display component includes:

obtaining an instruction carrying a target brightness voltage; the target brightness voltage corresponds to the target brightness;

According to the target brightness voltage and the predetermined brightness voltage of the display component, it is determined whether the target brightness is equal to the predetermined brightness of the display component; wherein the predetermined brightness voltage corresponds to the predetermined brightness.

In the above scheme, the method further includes:

When the target brightness is equal to the predetermined brightness, the display component dims to the target brightness based on the dimming mode, and displays the first display object.

According to a second aspect of the embodiments of the present disclosure, there is provided a display control apparatus, the apparatus comprising:

a judgment module, configured to determine whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that can be achieved by the display component based on the dimming mode;

a conversion module, configured to convert a first display object to be displayed into a second display object according to the target brightness and the predetermined brightness when the target brightness is not equal to the predetermined brightness, wherein the first display object is The display content of the display object and the second display object are the same;

a first display module, configured to dim the light to the predetermined brightness based on the dimming mode to display the second display object, wherein the display module displays the visual brightness of the first display object at the predetermined brightness , which is different from the visual brightness at which the second display object is displayed at the predetermined brightness.

In the above scheme, the conversion module includes:

a first determination submodule, configured to determine a conversion coefficient according to the target brightness and the predetermined brightness when the target brightness is not equal to the predetermined brightness;

A conversion submodule, configured to convert the first display object into a second display object according to the conversion coefficient.

In the above scheme, the conversion submodule includes:

a second determination submodule, configured to determine the first display data corresponding to the first display object;

a third determination submodule, configured to determine second display data according to the conversion coefficient and the first display data;

The fourth determination sub-module is configured to determine the second display object according to the second display data.

In the above solution, the first display data and the second display data are display data in a first grayscale mode; the first display module includes:

a fifth determination submodule, configured to determine output display data in a second grayscale mode according to the second display data; wherein, the total number of grayscales in the first grayscale mode is higher than that in the second grayscale mode The total number of grayscales in grayscale mode;

a driving sub-module, configured to provide a corresponding driving voltage based on the dimming mode according to the output display data;

A display sub-module, used for the display component to display the second display object according to the driving voltage.

In the above scheme, the conversion submodule includes:

generating a submodule for generating a mask according to the conversion coefficient;

A superimposition sub-module, configured to superimpose the mask layer with the first display object to obtain the second display object.

In the above scheme, the judging module includes:

an acquisition sub-module for acquiring an instruction carrying a target brightness voltage; the target brightness voltage corresponds to the target brightness;

The sixth determination sub-module is configured to determine whether the target brightness is equal to the predetermined brightness of the display component according to the target brightness voltage and the predetermined brightness voltage of the display component; wherein the predetermined brightness voltage corresponds to the predetermined brightness.

In the above scheme, the device further includes:

The second display module is configured to, when the target brightness is equal to the predetermined brightness, adjust the brightness of the display component to the target brightness based on the dimming mode, and display the first display object.

According to a third aspect of the embodiments of the present disclosure, there is provided a display control apparatus, the display control apparatus including at least: a processor and a memory for storing executable instructions that can be executed on the processor, wherein:

When the processor is used to run the executable instructions, the executable instructions execute the steps in any one of the above display control methods.

According to a second aspect of the embodiments of the present disclosure, a non-transitory computer-readable storage medium is provided, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, any of the foregoing An item that displays the steps in the control method.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: when the display components cannot display a display object with a target brightness in a desired dimming mode, the technical solutions of the present disclosure convert the display objects, so that the display components can pass the above-mentioned adjustment. The light mode can display the display object corresponding to the target brightness, so that the dimming mode used can ensure the color uniformity of the picture while ensuring the need for eye protection, and reduce the extra cost caused by setting different dimming modes, reducing the the complexity of the structure.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is an equivalent schematic diagram of a display unit circuit in an OLED display screen according to an exemplary embodiment;

FIG. 2 is a schematic flowchart of an implementation of a display control method according to an exemplary embodiment;

FIG. 3 is a schematic flowchart of an implementation of another display control method according to an exemplary embodiment;

FIG. 4 is a schematic diagram of an implementation flowchart of yet another display control method according to an exemplary embodiment;

FIG. 5 is a schematic diagram of a dimming mode switching principle of an OLED display screen according to an exemplary embodiment;

FIG. 6 is a schematic diagram of an implementation flow of yet another display control method according to an exemplary embodiment;

FIG. 7 is a schematic flowchart of image mapping according to an exemplary embodiment;

FIG. 8 is a schematic structural diagram of a display control device according to an exemplary embodiment;

FIG. 9 is a schematic diagram showing the composition structure of another display control device according to an exemplary embodiment;

FIG. 10 is a schematic structural diagram of another display control device according to an exemplary embodiment;

FIG. 11 is a block diagram showing the physical structure of another display control apparatus according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

Unlike LCD, OLED (display has no backlight, and each pixel is illuminated by a light-emitting transistor. By controlling the brightness of each light-emitting transistor, different pictures can be displayed. Figure 1 is a display unit in an OLED display screen. The equivalent schematic diagram of the circuit, as shown in Figure 1, OLED is the light-emitting element of the pixel. By controlling the current signal flowing through the OLED, the brightness value of the pixel can be controlled. Many OLEDs emit light with different brightness, which constitutes Since OLED has no backlight, when adjusting the overall brightness of the display screen, the overall brightness of the screen can also be controlled by adjusting the current signal flowing through each pixel as a whole.

There are two main ways to adjust the overall brightness of the OLED display:

First, the DC dimming mode.

In FIG. 1 , the switch T1 is used as the switch of the scan line S1 in the current pixel. When the scan line S1 provides an on signal, the scan switch T1 is turned on, and in the pixel array, the row where the current pixel is located is turned on. At this time, the data signal provided by the data line D1 can be transmitted to the driving switch T2. Under the action of the capacitor C and the data signal provided by the data line D1, the driving switch T2 is turned on at a level corresponding to the amplitude of the data signal. The voltage Vdd provided by the power line P1 remains unchanged. When the driving switch T2 is turned on to a certain extent, a corresponding current flows through the driving switch and drives the OLED to emit light with corresponding brightness. During this process, the Emission (light-emitting control electrode), that is, the input signal of the control electrode Em of the switch brightness switch T3, remains unchanged, and the brightness switch T3 is always kept on.

In this process, the brightness of each pixel in the OLED display screen is controlled by the data signal provided by the data line D1. When the scan line scans the pixels of each row, the data signal needs to change the voltage amplitude according to the brightness required by each pixel.

Second, PWM dimming mode.

In this mode, the signal provided by the data line D1 in FIG. 1 remains unchanged. During the time period when the scan line S1 provides the turn-on signal, the scan switch T1 is turned on to transmit the data signal to the drive switch T2, so that the drive switch T2 is turned on. The voltage Vdd provided by the power line P1 remains unchanged. In this process, the opening degree of the drive switches T2 of all pixels is the same, therefore, it is necessary to control the opening state of the brightness switch T3 to adjust the brightness of the OLED in the pixels.

Here, the adjustment method is to control the switching of the current path by the PWM signal input by Em. The PWM signal is an AC signal with a certain frequency and duty cycle provided according to the brightness requirements of the pixel. Since the frequency of the PWM signal is much higher than the resolution capability of the human eye, in terms of visual effect, the brightness of the pixel will follow the PWM signal. changes in duty cycle. For example, when the duty cycle of the PWM signal is 100%, that is, when it is a constant DC signal, there is always current passing through the path where the OLED is located, and the OLED is the brightest. When the high-frequency signal controls the brightness switch T3, 50% of the time on the path where the OLED is, there is current passing through, and the other 50% of the time is no current passing through. Therefore, in terms of visual effect, the brightness of the pixel is reduced. half.

For the PWM dimming mode, a 4-cycle dimming method is usually used, that is, the period of the PWM signal is 4 times the refresh frequency. Generally, the refresh frequency is set to 60Hz, and the frequency of the PWM signal is 240Hz. For the display screen with eye protection requirements, the flicker frequency is required to reach 3000Hz. Therefore, the PWM dimming mode is difficult to meet the requirements of eye protection, which will bring about a large flicker problem and cause the visual experience of the screen to deteriorate.

However, the DC dimming mode is difficult to achieve in low-brightness images. DC dimming needs to provide an accurate voltage value for each pixel to correspond to the required brightness. For pixels with the same brightness, it is necessary to provide exactly the same voltage value. . However, it is technically difficult to achieve complete consistency, and there must be a certain error in the voltage value provided by the pixel. In low-brightness pictures, the uneven picture caused by this error will be very obvious. Therefore, PWM dimming mode is usually used in low-brightness pictures, and DC dimming mode is only used in high-brightness pictures.

In an embodiment provided by the embodiments of the present disclosure, when a low-brightness picture needs to be displayed, the picture is first adjusted to a brightness that can use the DC dimming mode, and then the brightness of the picture is reduced through image processing, so as to achieve a DC dimming mode. Displays a low-brightness picture in dimming mode.

In another embodiment, a display control method is provided, as shown in FIG. 2 , the method includes:

Step 101: Determine whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that can be achieved by the display component based on the dimming mode;

Step 102, when the target brightness is not equal to the predetermined brightness, convert the first display object to be displayed into a second display object according to the target brightness and the predetermined brightness, wherein the display contents of the first display object and the second display object are the same;

Step 103: The display component is dimmed to a predetermined brightness based on the dimming mode to display the second display object, wherein the display component displays the visual brightness of the first display object with the predetermined brightness, which is different from the visual brightness of the display component displaying the second display object with the predetermined brightness. visual brightness.

Here, the target brightness is determined based on the picture to be displayed. For example, the display system receives an instruction to display a picture and receives relevant data of the picture. The related data of the screen includes data for determining the brightness of the screen. By comparing the data with the predetermined brightness specified by the system, it can be determined whether the current display assembly can be dimmed in the specified dimming mode and achieve the brightness.

The above-mentioned display object includes the received image data of at least one frame of image, the display object embodies the display content of an image, that is, the displayed picture, and the characteristic parameters included in the display object include the color, grayscale, brightness of pixels at different positions, and Image contrast and image saturation, etc., different display objects present different pictures, so the display contents are different. The above-mentioned first display object and the second display object have the same display content, but the overall brightness of the image is different, or the characteristic parameters are different, so that the presented visual brightness is different.

The above-mentioned display brightness is the brightness parameter of the display screen controlled according to the electrical signal provided by the display device. For example, by adjusting the parameters such as the voltage or power provided by the corresponding dimming mode, the corresponding display brightness can be obtained, thereby displaying the corresponding visual effect. The brightness of the display object. Visual brightness is the brightness parameter that the human eye can perceive the displayed picture, that is, the brightness of the picture, and the unit is candela per square meter (cd/m ² ) or nits (nits).

The above predetermined brightness is the range of display brightness specified according to the characteristics of the display component. When the target brightness is not equal to the predetermined brightness, the display component cannot achieve the target brightness through the specified dimming mode, or the target brightness achieved by the specified dimming mode will be affected. Display effect or produce other undesirable effects such as uneven color, flickering, etc. Therefore, it is necessary to adjust the display object, and convert the first display object into the second display object, so as to reduce adverse effects.

The dimming mode in step 101 may be a single dimming mode, for example, the single dimming mode may be the aforementioned DC dimming mode, and the specific implementation is not limited to the DC dimming mode, but may also be a DC dimming mode other dimming modes. In this way, through the conversion of display objects in steps 102 and 103, the problem of low display brightness that cannot be provided by the DC dimming mode can be solved.

If the single dimming mode is the PWM dimming mode, the constant switching of the adjustment frequency in the PWM dimming mode can be reduced, and the flicker phenomenon caused by the high duty cycle of the driving pulse in the PWM dimming mode can also be reduced.

Since the corresponding applicable brightness ranges may be different when the dimming modes of the display components are different, the predetermined brightness here may be the brightness value that can be provided by the dimming modes in this embodiment. It is worth noting that the preset brightness is a set of multiple brightness values, and the preset brightness includes a maximum brightness and a minimum brightness. If the target brightness is lower than the minimum brightness, or, the target brightness is greater than the maximum brightness, it is considered that the target brightness is not equal to the maximum brightness. the preset brightness.

When the target brightness is not equal to the predetermined brightness, it means that the current dimming mode is not applicable. In this embodiment, the display object (for example, text and/or image) needs to be converted, and the display pixel of the display object needs to be converted by converting the display pixel of the display object. , combined with the dimming mode and the conversion of the display object to realize the display of the target display brightness.

When converting an image, the brightness of the display object is actually adjusted by means other than dimming by applying the dimming mode, such as adjusting the gamma value of the image or adding a mask, etc., through non-hardware means (for example, software The display object is converted by means of calculation or firmware conversion, etc.), so as to realize the change of the display brightness and achieve the expected display effect.

Through the above method, when the dimming mode cannot achieve the target brightness, the adjustment can be realized by converting the display object, which not only ensures the dimming using the expected dimming mode, but also ensures the final display effect.

In some embodiments, when the target brightness is not equal to the predetermined brightness, converting the first display object to be displayed into the second display object according to the target brightness and the predetermined brightness includes:

Step 11, when the target brightness is not equal to the predetermined brightness, determine the conversion coefficient according to the target brightness and the predetermined brightness;

Step 12: Convert the first display object to the second display object according to the conversion coefficient.

Since the above-mentioned conversion of the display object does not actually involve the change of the display content, but the adjustment of the display brightness, the conversion coefficient can be determined according to the corresponding relationship between the target brightness and the predetermined brightness, and then adjusted by the conversion coefficient. For example, the conversion coefficient is determined according to the corresponding proportional change relationship between the target brightness and the predetermined brightness. Then, the first display object is multiplied by the conversion coefficient to realize the adjustment; or the adjustment is realized by superimposing a mask layer according to the conversion coefficient.

In this way, based on the target brightness, the difference between the final display effect and the initially expected display effect can be reduced as much as possible.

In some embodiments, the above-mentioned determining whether the target brightness is equal to the predetermined brightness of the display component includes:

Step 21, obtaining an instruction carrying a target brightness voltage; the target brightness voltage corresponds to the target brightness;

Step 22: Determine whether the target brightness is equal to the predetermined brightness of the display component according to the target brightness voltage and the predetermined brightness voltage of the display component; wherein the predetermined brightness voltage corresponds to the predetermined brightness.

When the display device processes the acquired target object that needs to be displayed, the data corresponding to the target brightness may be represented by signals such as corresponding voltages. Therefore, when an instruction carrying a target brightness voltage, that is, a voltage signal corresponding to the target brightness is obtained, the target brightness voltage can be compared with the predetermined brightness voltage corresponding to the predetermined brightness, so as to determine whether the target brightness is equal to the predetermined brightness. brightness.

The comparison of the voltage signals can make the operation system more convenient for operation processing, and quickly determine the range to which the target brightness belongs.

In some embodiments, the method further includes:

Step 31: When the target brightness is equal to the predetermined brightness, the display component adjusts the brightness to the target brightness based on the dimming mode, and displays the first display object.

When the target brightness is equal to the predetermined brightness, it can also be understood that when the target brightness falls within the range of the predetermined brightness, the current dimming mode can directly display a display object with the target brightness. Therefore, the conversion of the display object is not required here, and the display can be performed directly.

The embodiment of the present application provides another display control method, as shown in FIG. 3 , the method includes:

Step 201: Determine whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that the display component can achieve based on the dimming mode;

Step 202, when the target brightness is not equal to the predetermined brightness, determine the conversion coefficient according to the target brightness and the predetermined brightness;

Step 203, determining the first display data corresponding to the first display object;

Step 204, determining the second display data according to the conversion coefficient and the first display data;

Step 205: Determine a second display object according to the second display data; wherein, the display contents of the first display object and the second display object are the same;

Step 206: The display component is dimmed to a predetermined brightness based on the dimming mode to display the second display object, wherein the display component displays the visual brightness of the first display object with the predetermined brightness, which is different from the visual brightness of the display component displaying the second display object with the predetermined brightness. visual brightness.

The foregoing steps 203 to 205 provide an implementation manner of converting the first display object based on the conversion coefficient in the foregoing step 12.

The difference between the first display data and the second display data is that the display brightnesses corresponding to the first display data and the second display data are different.

The first display data corresponding to the first display object is used to perform arithmetic processing on the first display object, and the first display data reflects information such as content and brightness of the first display object in the form of data. For example, the pixel value of each pixel in the screen displayed by the first display object, and the like. The first display data is processed according to the conversion coefficient, for example, the first display object is multiplied by the conversion coefficient to obtain the second display data. In this way, by means of data processing, the conversion of the first display object into the second display object is achieved through conversion coefficients.

In some embodiments, the first display data and the second display data are display data in a first grayscale mode; the display component is dimmed to a predetermined brightness based on the dimming mode to display the second display object, including:

Step 41: Determine output display data in the second grayscale mode according to the second display data; wherein, the total grayscale number in the first grayscale mode is higher than the total grayscale number in the second grayscale mode;

Step 42, providing a corresponding driving voltage based on the dimming mode according to the second display data;

Step 43: The display component displays the second display object according to the driving voltage.

When controlling the display component to display, in order to reduce the amount of data, a second grayscale mode with a lower number of bits can be used for control, for example, an 8-bit mode. The above-mentioned first display data and second display data are used for the conversion of display objects. In order to ensure the accuracy of the operation, both the first display data and the second display data can be represented by a first grayscale mode with a higher number of bits. . For example, if a 10-bit grayscale mode is used, the grayscale value ranges from 0 to 1023 in the corresponding display data. It can be understood that the range from the maximum brightness value to the minimum brightness value for the display component is divided into 1024 equal parts. In contrast, in the 8bit mode, the maximum brightness value to the minimum brightness value of the display component is divided into 256 equal parts, and the grayscale accuracy corresponding to different brightness requirements will be lower than the above-mentioned 10bit mode.

Therefore, through the solution in this embodiment, it is more accurate to use the first grayscale mode for operation, and then the second display data to be displayed can be converted back to the second grayscale mode with a lower number of bits to Drive and display.

The total number of grayscales corresponding to the second grayscale mode may be: the number of grayscales that the display can achieve in the dimming mode; for example, the maximum grayscale that the display can achieve in the dimming mode number.

An embodiment of the present disclosure provides another display control method, as shown in FIG. 4 , the method includes:

Step 301: Determine whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that the display component can achieve based on the dimming mode;

Step 302, when the target brightness is not equal to the predetermined brightness, determine the conversion coefficient according to the target brightness and the predetermined brightness;

Step 303, generating a mask according to the conversion coefficient;

Step 304, superimposing the mask layer on the first display object to obtain a second display object, wherein the display contents of the first display object and the second display object are the same;

Step 305: The display component is dimmed to a predetermined brightness based on the dimming mode to display the second display object, wherein the display component displays the visual brightness of the first display object with the predetermined brightness, which is different from the visual brightness of the display component displaying the second display object with the predetermined brightness. visual brightness.

Here, another way of converting the first display object into the second display object according to the conversion coefficient is provided. This can be achieved by some software tools, such as GPU paint tools. The mask layer is generated directly according to the conversion factor. The mask layer here can be an overlay layer with a certain transparency. The lower the transparency, the lower the image brightness of the overlay mask layer. Therefore, the transparency of the image mask layer here can be determined by the above conversion factor. To determine, different conversion coefficients correspond to masks with different transparency. Then, a mask layer is superimposed on the first display object, so as to adjust the visual brightness of the display during the display process, so as to reduce the difference between the final display brightness and the expected display brightness as much as possible.

An embodiment of the present disclosure provides a display control method. Based on a product with a fixed dimming mode in the related art, through the adjustment of an external signal, the DC dimming mode can be adjusted even when a low-brightness picture needs to be displayed. Light.

Products with fixed dimming modes in the related art can adjust the pixel brightness by adjusting the voltage or current of the DC Source (control source) when a high-brightness picture needs to be displayed, that is, DC dimming; When the brightness of the picture is used, PWM dimming is used. As shown in FIG. 5 , the threshold parameter for switching the dimming mode is generally defined as DBV equal to a, and DBV is a voltage parameter: decibel volts, which is used to represent the driving voltage value corresponding to the screen brightness. When DBV is greater than or equal to a, DC dimming is used; when DBV is less than a, PWM dimming is used.

This dimming mode is fixed for products that have been produced, because the dimming method is programmed during the production of the control module of the product. After the production of the product, in order to ensure the optical performance of the product, it cannot be adjusted by writing code under the software or by adjusting the gamma value. The gamma value here refers to the relationship curve between screen brightness and input voltage.

In the embodiment of the present disclosure, after the product module has been produced, the system-side adjustment method is used to realize the DC dimming mode in the process of changing the screen displayed by the OLED product from the darkest to the brightest, and is compatible with PWM dimming. Products in light mode and DC dimming mode.

FIG. 6 is a schematic diagram of an implementation flow of a control display control method provided by an embodiment of the present disclosure. As shown in FIG. 6 , the method includes:

S1. Read the dimming mode switching threshold of the display screen, which is the DBV value when switching between the PWM dimming mode and the DC dimming mode, which is defined as a.

S2. When the ambient light changes or it is detected that the user is dragging the brightness bar, the DBV value required by the current system is read and defined as b.

S3, determine the relationship between the size of the DBV value b required by the current system and the threshold value a;

When b is greater than or equal to a, then the screen brightness b that needs to be displayed on the display screen at this time is in the interval where the DC dimming mode is located, and enters S4;

When b is less than a, then the screen brightness b that needs to be displayed by the display screen at this time is in the interval where the PWM dimming mode is located, then enter S5.

S4. The processor directly outputs the currently rendered image IM1, and displays it on the display screen to complete the display of the current image.

S5. Adjust the DBV value of the current system to a, and the corresponding rendered image is IM1; then remap the currently rendered image IM1 to obtain an image IM2 with reduced brightness; display IM2 on the display screen to complete the rendering of the current image show.

FIG. 7 is a schematic flowchart of the image mapping in the above S5. First, the conversion coefficient of the system is calculated, and the calculation method adopts brightness calculation. First, remap the current image data. Since the number of 8-bit data is small, it is easy to cause precision loss in the calculation. Therefore, it is mapped to 10-bit data for calculation to ensure the calculation accuracy. The calculation steps are as follows:

S51. Calculate the luminance value currently required by the system Lv0=b/DBV_Level*Lv_Max, where DBV_Level is the luminance level corresponding to DBV, LV_Max is the maximum luminance level that the display module can achieve, and calculate the luminance Lv0 required by the system.

S52. Calculate the required gray scale of the mapping, and the calculation method is: ((GL/1024)^2.2)*Lv_a=Lv0. Among them, Lv_a is the brightness level corresponding to the DBV threshold, and GL is the gray level that needs to be mapped currently.

S53, calculate the conversion coefficient, i=GL/1024;

S54. Convert the image according to the above-mentioned conversion coefficient, and the conversion method is the calculation of the image data: IM2=IM1*i.

After the calculation is completed, the obtained image data of IM2 is converted from 10bit to 8bit to obtain the final output image.

In the above step 54, the image data can be re-converted in various ways. The first is to use a PCC (programmable computer controller, programmable computer controller) tool to multiply the different data of each RGB pixel by a conversion coefficient. i, to realize the conversion of data. The second method can use GPU (GraphicsProcessing Unit, graphics processor) to draw, by adding a mask, the coefficient of the entire mask is i, so that the overall brightness data of the image is reduced to The effect of the desired luminance data.

After the image is remapped, the grayscale resolution of the system will be reduced, and the lower the brightness, the greater the grayscale loss. In order to ensure the final display effect of the system, an algorithm for resolution adjustment such as dither algorithm can be used to improve the grayscale resolution of the system, so as to ensure that the system can display the grayscale resolution more accurately.

Through the above method, under the condition that the display module has been produced, the whole process of DC dimming can be realized through the later algorithm processing, so as to ensure the eye protection effect and display effect, and improve the gray scale resolution. The method can be compatible with display modules with two modes of DC dimming and PWM dimming, so as to meet different display requirements and improve the display effect.

An embodiment of the present disclosure provides a display control apparatus. As shown in FIG. 8 , the apparatus 800 includes:

A determination module 810, configured to determine whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that the display component can achieve based on the dimming mode;

The conversion module 820 is configured to convert the first display object to be displayed into the second display object according to the target brightness and the predetermined brightness when the target brightness is not equal to the predetermined brightness, wherein the display of the first display object and the second display object the same content;

The first display module 830 is configured to dim the light to a predetermined brightness based on the dimming mode to display the second display object, wherein the display module displays the visual brightness of the first display object with the predetermined brightness, which is different from displaying the second display object with the predetermined brightness visual brightness.

In some embodiments, the above conversion module 820 includes:

a first determination submodule, configured to determine the conversion coefficient according to the target brightness and the predetermined brightness when the target brightness is not equal to the predetermined brightness;

The conversion submodule is configured to convert the first display object into the second display object according to the conversion coefficient.

In some embodiments, the above judgment module 810 includes:

an acquisition sub-module for acquiring an instruction carrying a target brightness voltage; the target brightness voltage corresponds to the target brightness;

The sixth determination sub-module is configured to determine whether the target brightness is equal to the predetermined brightness of the display component according to the target brightness voltage and the predetermined brightness voltage of the display component; wherein the predetermined brightness voltage corresponds to the predetermined brightness.

In some embodiments, the above-mentioned apparatus 800 further includes:

The second display module is used for, when the target brightness is equal to the predetermined brightness, the display component adjusts the brightness to the target brightness based on the dimming mode, and displays the first display object.

An embodiment of the present disclosure provides a display control device. As shown in FIG. 9 , the device 900 includes: a determination module 810 , a conversion module 820 , and a first display module 830 . The above conversion module 820 includes: a first determination sub-module 821, a conversion sub-module 822,

Wherein, the above-mentioned conversion submodule 822 includes:

The second determination submodule 901 is configured to determine the first display data corresponding to the first display object;

a third determination sub-module 902, configured to determine the second display data according to the conversion coefficient and the first display data;

The fourth determination sub-module 903 is configured to determine the second display object according to the second display data.

In some embodiments, the first display data and the second display data are display data in a first grayscale mode; the first display module 830 includes:

The fifth determination sub-module 904 is configured to determine the output display data in the second grayscale mode according to the second display data; wherein, the total grayscale number in the first grayscale mode is higher than that in the second grayscale mode. The total number of grayscales;

a driving sub-module 905, configured to provide a corresponding driving voltage based on the dimming mode according to the second display data;

The display sub-module 906 is used for the display component to display the second display object according to the driving voltage.

An embodiment of the present disclosure provides a display control device. As shown in FIG. 10 , the device 1000 includes: a determination module 810 , a conversion module 820 , and a first display module 830 . The above conversion module includes: a first determination sub-module 821 and a conversion sub-module 822 .

Wherein, the above-mentioned conversion submodule 822 includes:

A generation submodule 1001 is used to generate a mask layer according to the conversion coefficient;

The overlay sub-module 1002 is used for overlaying the mask layer with the first display object to obtain the second display object.

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

FIG. 11 is a block diagram of a display control apparatus 1100 according to an exemplary embodiment. For example, apparatus 1100 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, or the like.

11, the apparatus 1100 may include one or more of the following components: a processing component 1101, a memory 1102, a power supply component 1103, a multimedia component 1104, an audio component 1105, an input/output (I/O) interface 1106, a sensor component 1107, and Communication component 1108 .

The above-mentioned memory 1102 is used to store executable instructions that can be executed on the processor 1110; wherein,

When the processor 1110 is configured to execute the executable instructions, the executable instructions execute the steps in the display brightness control method provided in any of the above method embodiments.

The processing component 1101 generally controls the overall operation of the device 1100, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1101 may include one or more processors 1110 to execute instructions to perform all or part of the steps of the methods described above. In addition, the processing component 1101 may also include one or more modules to facilitate interaction between the processing component 1101 and other components. For example, processing component 1101 may include a multimedia module to facilitate interaction between multimedia component 1104 and processing component 1101 .

Memory 1102 is configured to store various types of data to support operations at device 1100 . Examples of such data include instructions for any application or method operating on device 1100, contact data, phonebook data, messages, pictures, videos, and the like. Memory 1102 may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.

Power supply assembly 1103 provides power to various components of device 1100 . Power components 1103 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 1100 .

Multimedia component 1104 includes screens that provide an output interface between the device 1100 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensor may not only sense the boundaries of a touch or swipe action, but also detect the duration and pressure associated with the touch or swipe action. In some embodiments, the multimedia component 1104 includes a front-facing camera and/or a rear-facing camera. When the device 1100 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and/or rear camera can be a fixed optical lens system or have focal length and optical zoom capability.

Audio component 1105 is configured to output and/or input audio signals. For example, audio component 1105 includes a microphone (MIC) that is configured to receive external audio signals when device 1100 is in operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in memory 1110 or transmitted via communication component 1108 . In some embodiments, the audio component 1105 also includes a speaker for outputting audio signals.

The I/O interface 1106 provides an interface between the processing component 1101 and a peripheral interface module, which may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.

Sensor assembly 1107 includes one or more sensors for providing status assessment of various aspects of device 1100 . For example, the sensor assembly 1107 can detect the open/closed state of the device 1100, the relative positioning of components, such as the display and keypad of the device 1100, the sensor assembly 1107 can also detect the position of the device 1100 or a component of the device 1100 changes, the presence or absence of user contact with the device 1100, the orientation or acceleration/deceleration of the device 1100 and the temperature change of the device 1100. Sensor assembly 1107 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 1107 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1107 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 1108 is configured to facilitate wired or wireless communication between device 1100 and other devices. Device 1100 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 1108 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1108 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology or other technologies.

In an exemplary embodiment, apparatus 1100 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory 1102 including instructions, executable by the processor 1110 of the apparatus 1100 to accomplish the above method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

A non-transitory computer-readable storage medium, when an instruction in the storage medium is executed by a processor of a mobile terminal, enables the mobile terminal to execute the display control method in any of the foregoing embodiments. In one embodiment, the method includes:

determining whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that the display component can achieve based on the dimming mode;

When the target brightness is not equal to the predetermined brightness, the first display object to be displayed is converted into a second display object according to the target brightness and the predetermined brightness, wherein the first display object and the The display content of the second display object is the same;

The display component is dimmed to the predetermined brightness based on the dimming mode to display the second display object, wherein the display component displays the visual brightness of the first display object at the predetermined brightness, which is different from the visual brightness of the first display object. The display component displays the visual brightness of the second display object at the predetermined brightness.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common general knowledge or techniques in the technical field not disclosed by this disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. a display control method, is characterized in that, comprises: determining whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that the display component can achieve based on the dimming mode; When the target brightness is not equal to the predetermined brightness, determining a conversion coefficient according to the target brightness and the predetermined brightness; converting the first display object to be displayed into a second display object according to the conversion coefficient, wherein the display contents of the first display object and the second display object are the same; The display component is dimmed to the predetermined brightness based on the dimming mode to display the second display object, wherein the display component displays the visual brightness of the first display object at the predetermined brightness, which is different from the visual brightness of the first display object. the display component displays the visual brightness of the second display object at the predetermined brightness; Wherein, the display component dimming to the predetermined brightness based on the dimming mode to display the second display object includes: According to the second display data corresponding to the second display object, the output display data in the second grayscale mode is determined; wherein, the first display data and the second display data corresponding to the first display object are the first grayscale display data in the mode; the total grayscale number in the first grayscale mode is higher than the total grayscale number in the second grayscale mode; Displaying the second display object according to the output display data; The converting the first display object into the second display object according to the conversion coefficient includes: determining the first display data corresponding to the first display object; determining second display data according to the conversion coefficient and the first display data; The second display object is determined according to the second display data. 2. The control method according to claim 1, wherein displaying the second display object according to the output display data comprises: According to the output display data, a corresponding driving voltage is provided based on the dimming mode; The display component displays the second display object according to the driving voltage. 3. The control method according to claim 1, wherein the determining whether the target brightness is equal to the predetermined brightness of the display component comprises: obtaining an instruction carrying a target brightness voltage; the target brightness voltage corresponds to the target brightness; According to the target brightness voltage and the predetermined brightness voltage of the display component, it is determined whether the target brightness is equal to the predetermined brightness of the display component; wherein the predetermined brightness voltage corresponds to the predetermined brightness. 4. The control method according to claim 1, wherein the method further comprises: When the target brightness is equal to the predetermined brightness, the display component dims to the target brightness based on the dimming mode, and displays the first display object. 5. A display control device, characterized in that, comprising: a judgment module, configured to determine whether the target brightness is equal to a predetermined brightness, wherein the predetermined brightness is the display brightness that can be achieved by the display component based on the dimming mode; a conversion module, comprising a first determination sub-module, the first determination sub-module is configured to determine a conversion coefficient according to the target brightness and the predetermined brightness when the target brightness is not equal to the predetermined brightness; The conversion module further includes a conversion sub-module, and the conversion sub-module is configured to convert the first display object to be displayed into a second display object according to the conversion coefficient, wherein the first display object and the first display object are The display contents of the two display objects are the same; a first display module, configured to dim the light to the predetermined brightness based on the dimming mode to display the second display object, wherein the display module displays the visual brightness of the first display object at the predetermined brightness , which is different from the visual brightness at which the second display object is displayed at the predetermined brightness; Wherein, the first display module includes: a fifth determination submodule, configured to determine output display data in the second grayscale mode according to the second display data; wherein the first display data and the second display data corresponding to the first display object are the first display data and the second display data corresponding to the first display object. Display data in the grayscale mode; the total grayscale number in the first grayscale mode is higher than the total grayscale number in the second grayscale mode; a driving sub-module and a display sub-module for displaying the second display object according to the output display data; The conversion submodule includes: a second determination submodule, configured to determine the first display data corresponding to the first display object; a third determination submodule, configured to determine second display data according to the conversion coefficient and the first display data; The fourth determination sub-module is configured to determine the second display object according to the second display data. 6 . The control device according to claim 5 , wherein the driving sub-module is configured to provide a corresponding driving voltage based on the dimming mode according to the output display data; 6 . The display sub-module is used for the display component to display the second display object according to the driving voltage. 7. The control device according to claim 5, wherein the judging module comprises: an acquisition sub-module for acquiring an instruction carrying a target brightness voltage; the target brightness voltage corresponds to the target brightness; The sixth determination sub-module is configured to determine whether the target brightness is equal to the predetermined brightness of the display component according to the target brightness voltage and the predetermined brightness voltage of the display component; wherein the predetermined brightness voltage corresponds to the predetermined brightness. 8. The control device according to claim 6, wherein the device further comprises: The second display module is configured to, when the target brightness is equal to the predetermined brightness, adjust the brightness of the display component to the target brightness based on the dimming mode, and display the first display object. 9. A display control device, characterized in that the display control device at least comprises: a processor and a memory for storing executable instructions that can be executed on the processor, wherein: When the processor is used to run the executable instructions, the executable instructions execute the steps in the display control method provided by any one of the above claims 1 to 4. 10. A non-transitory computer-readable storage medium, characterized in that, computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, any one of the above claims 1 to 4 is implemented. Steps in a provided display control method.

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