CN117975847A - Display driving method, driving chip, device, medium and product - Google Patents

Abstract

The application discloses a driving method, a driving chip, equipment, a medium and a product of a display. The driving method of the display comprises the following steps: dividing a frame of image into a plurality of subfields; selecting at least one subfield among a plurality of subfields as a first type subfield; the first initial weight of the first type of subfields is controlled to be a decimal, so that the light emitting time of the first type of subfields is smaller than the unit scanning time of the subfields. According to the embodiment of the application, the influence of the motion blur phenomenon on the display effect can be reduced.

Description

Display driving method, driving chip, device, medium and product

Technical Field

The present application relates to the field of display technology, and in particular to a display driving method, a driving chip, a device, a medium and a product.

Background technique

With the development of display technology and the improvement of people's living standards, display devices have entered all aspects of people's production and life. However, while display devices bring convenience to people, there is also the problem of motion blur during display, resulting in poor image display quality. Therefore, how to reduce or even eliminate the impact of motion blur on display effects is one of the problems that need to be solved.

Summary of the invention

The embodiments of the present application provide a display driving method, a driving chip, a device, a medium and a product, which can reduce the influence of motion blur on the display effect.

In a first aspect, an embodiment of the present application provides a method for driving a display, including: dividing a frame of an image into multiple subfields; selecting at least one subfield from the multiple subfields as a first type of subfield; controlling a first initial weight of the first type of subfield to be a decimal so that the luminous time of the first type of subfield is less than a unit scanning time of the subfield.

In a possible implementation of the first aspect, the display includes a pixel, the pixel is connected to a first power supply terminal and a second power supply terminal, the first power supply terminal is used to provide a first voltage, and the second power supply terminal is used to provide a second voltage;

The driving method also includes:

selecting at least one subfield from the plurality of subfields as a subfield of the second type;

The second initial weight for controlling the second type of subfield is an integer, and the actual difference between the first voltage and the second voltage corresponding to at least one second type of subfield is controlled to be greater than the original difference v1 between the first voltage and the second voltage corresponding to the second type of subfield, and the actual difference between the first voltage and the second voltage corresponding to the first type of subfield is the original difference v1.

In a possible implementation manner of the first aspect, the driving method further includes:

The second target weight for controlling the second type of subfield is 1/N1 of the second initial weight, where N1 is greater than 1.

In a possible implementation manner of the first aspect, the driving method further includes:

The first target weight of the first type of subfield is controlled to be 1/N1 of the first initial weight.

In a possible implementation manner of the first aspect, the driving method further includes:

Selecting at least one of the plurality of second-type subfields as a second target subfield, and controlling the actual number of the second target subfields to be M times of the original number, M>1;

The sum of the second target weights of the M second target subfields is controlled to be the second initial weight, and each second target weight is a decimal.

In a possible implementation manner of the first aspect, the driving method further includes:

The second target weights of the M second target subfields are controlled to be equal.

In a possible implementation manner of the first aspect, the driving method further includes:

The actual differences between the first voltage and the second voltage corresponding to the M second target subfields are controlled to be equal.

Based on the same inventive concept, in a second aspect, an embodiment of the present application further provides a driver chip for driving a display, the driver chip comprising:

A division module, used for dividing a frame of image into multiple subfields;

A selection module, used for selecting at least one subfield from a plurality of subfields as a first type of subfield;

The driving module is used to control the first initial weight of the first subfield to be a decimal, so that the light emitting time of the first subfield is less than the subfield unit scanning time.

Based on the same inventive concept, in a third aspect, an embodiment of the present application further provides an electronic device, including:

a processor, and a memory storing computer program instructions;

The processor reads and executes computer program instructions to implement the display driving method as described in any one of the embodiments of the first aspect.

Based on the same inventive concept, in a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, a method for driving a display as described in any one of the embodiments in the first aspect is implemented.

Based on the same inventive concept, in a fifth aspect, an embodiment of the present application further provides a computer program product, the computer program product comprising computer program instructions, which when executed by a processor implement a method for driving a display as described in any one of the embodiments in the first aspect.

According to an embodiment of the present application, at least one is selected from multiple subfields as a first type of subfield, and the first initial weight of the first type of subfield is controlled to be a decimal. The scanning time corresponding to the subfield with a weight of 1 is the subfield unit scanning time. If the scanning time corresponding to the subfield with a decimal weight is calculated according to the subfield unit scanning time, since the luminous time of a subfield is less than or equal to the scanning time of the subfield, the luminous time corresponding to the subfield with a decimal weight is less than the subfield unit scanning time. Therefore, when the picture corresponding to the first type of subfield is driven with a decimal weight, the luminous time of the first type of subfield can be made less than the subfield unit scanning time, so as to reduce the influence of the motion blur phenomenon of the first type of subfield on the display effect.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

FIG1 is a schematic diagram showing a motion blur phenomenon generated when a picture moves;

FIG2 is a schematic diagram showing a motion blur phenomenon generated when the head moves;

FIG3 is a schematic diagram showing a motion blur phenomenon generated when the direction of head movement is the same as the direction of pixel movement;

FIG4 is a schematic diagram showing a motion blur phenomenon generated when the direction of head movement is opposite to the direction of pixel movement;

FIG5 is a schematic diagram showing a conventional method of suppressing motion blur in the display industry;

FIG6 is a schematic diagram showing a flickering frequency and a fluctuation frequency;

FIG. 7 shows a schematic structural diagram of a pixel in a display driving method provided in an embodiment of the present application;

FIG8 shows another schematic structural diagram of a pixel in a display driving method provided in an embodiment of the present application;

FIG9 shows a schematic diagram of subfield data in the related art;

FIG10 is a schematic diagram showing the smear distance corresponding to FIG9 ;

FIG11 is a schematic diagram showing a flow chart of a method for driving a display provided in an embodiment of the present application;

FIG12 is a schematic diagram showing subfield data in a display driving method provided in an embodiment of the present application;

FIG13 is a schematic diagram showing a brightness waveform corresponding to FIG12;

FIG14 is a schematic diagram showing brightness values corresponding to FIG12 ;

FIG15 is a schematic diagram showing a comparison of motion blur generated by analog driving and digital driving corresponding to FIG12 ;

FIG16 shows another schematic diagram of subfield data in the display driving method provided by an embodiment of the present application;

FIG17 is a schematic diagram showing a brightness waveform corresponding to FIG16;

FIG18 is a schematic diagram showing a comparison of motion blur generated by analog driving and digital driving corresponding to FIG16 ;

FIG19 shows another schematic diagram of subfield data in the display driving method provided in an embodiment of the present application;

FIG20 is a schematic diagram showing a brightness waveform corresponding to FIG19;

FIG21 shows another schematic diagram of subfield data in the display driving method provided by an embodiment of the present application;

FIG22 is a schematic diagram showing a brightness waveform corresponding to FIG21;

FIG23 is a schematic diagram showing a comparison of motion blur generated by analog driving and digital driving corresponding to FIG21 ;

FIG24 shows a schematic structural diagram of a driver chip provided in an embodiment of the present application;

FIG. 25 shows a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

Detailed ways

The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or region, it may mean that it is directly on the other layer or region, or that other layers or regions are included between it and the other layer or region. Furthermore, if the component is turned over, the layer or region will be "below" or "beneath" another layer or region.

It should be understood that the term "and/or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiments of the present application, the term "connection" may refer to a direct connection between two components, or may refer to a connection between two components via one or more other components. The term "drive" may refer to "control" or "operate". A display may be a display device or a module/part of a display device.

It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for which protection is required) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

In the display industry, silicon-based microdisplay technology not only achieves higher pixel density and system integration due to the mature complementary metal oxide semiconductor (CMOS) process that can integrate more display units per unit area, but also has the advantages of high resolution, high contrast and low power consumption. Therefore, silicon-based microdisplay technology is currently the focus of industry attention. Whether it has a good display effect is an important factor in measuring the performance of a display. Due to the existence of the human eye's visual response process, digitally driven silicon-based microdisplays have motion blur. Therefore, how to reduce or even eliminate the impact of motion blur on the display effect is one of the problems that need to be solved.

The human eye's perception of external light brightness is of the energy accumulation type. Therefore, there is a slight delay from the moment the light starts to the moment the human eye begins to perceive the brightness, and from the moment the light disappears to the moment the human eye no longer perceives the brightness. The two are called the visual delay effect and the visual persistence effect. Depending on the color and brightness of the light, as well as individual differences between people, this delay is generally 50ms to 200ms. The visual delay effect and the visual persistence effect together represent the visual response process of the human eye. Due to the existence of the visual response process, the process of the human eye receiving the brightness of the image is usually expressed as a dynamic integration of the brightness of the image pixels.

Due to the existence of the human eye's visual response process, when the displayed image moves quickly, it often has a smearing phenomenon, which is called motion blur. In a near-eye display environment (such as augmented reality (AR)/virtual reality (VR) and other environments), there is not only dynamic blur caused by the rapid movement of the display image on a conventional display screen, but also a more important dynamic blur phenomenon, which is the motion blur caused when the display moves with the head.

This will have a significant impact on the normal viewing experience. Therefore, how to reduce the impact of motion blur on display effects is currently the focus of the industry.

Figure 1 details the main causes of motion blur in the traditional display industry (displays are fixed). In the traditional display industry, displays are fixed, so motion blur only occurs when the display image moves quickly. Since the display has a high PPI (pixel density), the continuously luminous pixels are moving, and due to the existence of the human eye's visual response process, this process will be regarded as a continuous behavior, that is, motion blur. In Figure 1, when a pixel moves quickly from point A to point B, a smear of length d will be generated. In this case, the length of the smear d satisfies the following formula (1):

d＝v ₁ T (1)

Among them, _v1 is the moving speed of the pixel in the picture, and T is the movement time.

Unlike the traditional display industry (where the display is fixed), in near-eye display environments (including AR/VR environments), since the display image moves with the head, the following situations can be subdivided into the following situations where motion blur occurs:

1) The head does not move, but the picture moves;

2) The head moves but the picture does not move;

3) Head movement, picture movement.

For case 1)

Similar to the phenomenon in the traditional display industry (display is fixed), the principle of motion blur is also shown in Figure 1.

For case 2)

As shown in Figure 2, when the pixel A at the center of a still image continues to emit brightness that can be recognized by the human eye, and the image moves to the right with the head, a smear of length d will also be generated. The reason for the smear is also due to the visual response process of the human eye during the movement of the pixel. In this case, the length of the smear d satisfies the following formula (2):

d＝v ₂ T (2)

Among them, v ₂ is the moving speed of the head and T is the movement time.

For case 3), when the direction of head movement is the same as the direction of pixel movement, as shown in Figure 3, the distance of the smear will be longer. In this case, the length of the smear d satisfies the following formula (3):

d＝v ₃ T (3)

Wherein, v ₃ is the total moving speed of the pixel, v ₃ =v ₁ +v ₂ , and T is the moving time.

When the head movement direction is opposite to the pixel movement direction, as shown in Figure 4, the distance of the smear will be shorter. In this case, _v3 = _v1 - _v2 or _v3 = _v2 - _v1 .

It can be seen that in near-eye display environments (including AR/VR and other environments), the occurrence of the Motion Blur phenomenon is proportional to the time that the pixel continues to emit light.

In summary, the most obvious difference between the near-eye display environment (including AR/VR and other environments) and the traditional display industry (the display is fixed) is that when the display moves with the head but the picture does not move, a new motion blur phenomenon will be introduced, and this phenomenon is more obvious because it lasts longer. In the subsequent embodiments, in order to deepen the understanding of the solution proposed in this application, in the near-eye display environment (including AR/VR and other environments), case 2) is used as an example for explanation.

In the traditional display industry (displays are fixed), the main solution to the Motion Blur phenomenon is to increase the brightness. As shown in Figure 5, for example, the brightness of the pixel is increased to 5 times the original, so that 80% of the original frame time becomes a black screen. In this way, the smear distance d can be reduced by reducing the time t.

But this will introduce new problems:

1) Increasing the voltage and brightness will increase the life of the display.

2) Adding a black screen brings serious flicker. As shown in Figure 6, the flicker evaluation of the display can be based on the IEEE-1789-2005 standard. The fluctuation frequency from the white screen to the black screen is 100%. At this time, the display frequency needs to reach 1250Hz or more to filter out the impact on the human eye. However, the display frequency of general monitors is 100Hz, which is far from meeting this requirement.

In near-eye display environments (including AR/VR and other environments), the drive can be mainly divided into analog drive and digital drive. In digital drive, a frame of the picture is divided into multiple subfields, so digital drive has its own inhibitory effect on the Motion Blue phenomenon, and at the same time will not cause flicker that is harmful to the human eye. The driving method of the display provided in the embodiment of the present application may be a digital driving method, and a specific example of the driving method of the display will be described below.

In addition, as shown in FIG. 7 or FIG. 8, the pixel in the display can be connected to a first power supply terminal VP and a second power supply terminal VCOM, the first power supply terminal VP is used to provide a first voltage, and the second power supply terminal VCOM is used to provide a second voltage. Specifically, the pixel includes a MOS tube and a light-emitting device, and the light-emitting device includes a light-emitting material. As shown in FIG. 7, the anode of the light-emitting device is connected to the first power supply terminal VP through the MOS tube, and the cathode of the light-emitting device is connected to the second power supply terminal VCOM. Alternatively, as shown in FIG. 8, the anode of the light-emitting device is connected to the first power supply terminal VP, and the cathode of the light-emitting device is connected to the second power supply terminal VCOM through the MOS tube.

It is understandable that in the structure shown in Figure 7, since the MOS tube is between the first power terminal VP and the luminescent material, the adjustable voltage range of the first power terminal VP is limited. In contrast, in the structure shown in Figure 8, since it is not limited by the maximum load voltage of the MOS tube, the adjustable voltage range of the first power terminal VP can be increased, for example, the voltage of the first power terminal VP can be increased to more than positive 10V.

In near-eye display environments (including AR/VR and other environments), the driving schemes for display screens can be mainly divided into analog driving and digital driving.

For analog drive, the pixels on the display screen will continue to emit light during the time it takes to display a frame of image. Generally speaking, for example, corresponding to 256 grayscale levels, the adjustable brightness of the pixels is at least 256 levels. Therefore, the motion blur phenomenon of analog drive still satisfies formula (2), where T is the time it takes to display a frame of image:

d＝v ₂ T (2)

The difference between digital drive and analog drive is that in digital drive, a frame of picture is divided into multiple subfields, each subfield has its own weight and luminous time. Through the visual response process of the human eye, all subfields are pieced together into a complete frame of picture. When 12bit data is used to represent 4096 levels of grayscale, the data of each subfield is shown in Figure 9, where t represents the unit luminous time of the subfield. It should be noted that in the schematic diagram of each subfield data of the present application, the voltage values v1, v2, v3, v4, etc. represent the voltage difference between the first power supply terminal VP and the second power supply terminal VCOM. The voltage values of different subfields (i.e., the voltage difference between the first power supply terminal VP and the second power supply terminal VCOM) are the same, which means that the initial transient brightness of different subfields is the same, but the luminous time of different subfields is different, so different luminous times make the actual overall brightness of different subfields different.

If d _n represents the smear distance of the nth subfield, and n is any one of 0 to 11, then the smear distance generated by each subfield shown in FIG. 9 is as shown in FIG. 10 .

Due to the difference in display picture data, it is not mandatory to light up all subfields. If the data of a frame is B, the actual smear length _D0 generated by this frame is as shown in formula (5):

D ₀ ＝B ₀ d ₀ +B ₁ d ₁ +B ₂ d ₂ +B ₃ d ₃ +…+B ₁₀ d ₁₀ +B ₁₁ d ₁₁ (5)

Wherein, B _n represents the bit data of the nth bit. If B _n is 0, it means that this subfield is completely black; if B _n is 1, it means that this subfield is lit.

If the subfield unit luminescence time is less than the subfield unit scanning time, although some efficiency will be sacrificed, the Motion Blur phenomenon will be better optimized. Based on this technical concept, in order to improve the impact of motion blur on display effects in near-eye display environments (including AR/VR and other environments), the present application provides a digital drive scanning solution. Specifically, the present application provides a display driving method, a driving chip, an electronic device, a computer-readable storage medium, and a computer program product. The display driving method, driving chip, electronic device, computer-readable storage medium, and computer program product can be used, for example, in digitally driven displays that are prone to motion blur, wherein the digitally driven displays can include, for example: liquid crystal displays LCD, digitally driven light emitting diode LED displays, and organic light emitting diode OLED displays, and of course other displays, and the present application is not limited thereto.

The following first introduces the driving method of the display provided in the embodiment of the present application.

As shown in FIG. 11 , the display driving method provided in the embodiment of the present application includes S10 to S30 .

S10, dividing a frame of image into a plurality of subfields;

S20, selecting at least one subfield from the plurality of subfields as a first type of subfield;

S30, controlling the first initial weight of the first type of subfield to be a decimal, so that the light emitting time of the first type of subfield is less than the subfield unit scanning time.

The specific implementation of the above steps will be described in detail below.

According to the driving method of the display provided by the embodiment of the present application, at least one is selected from multiple subfields as the first type of subfield, and the first initial weight of the first type of subfield is controlled to be a decimal. The scanning time corresponding to the subfield with a weight of 1 is the subfield unit scanning time. If the scanning time corresponding to the subfield with a decimal weight is calculated according to the subfield unit scanning time, since the luminous time of a subfield is less than or equal to the scanning time of the subfield, the luminous time corresponding to the subfield with a decimal weight is less than the subfield unit scanning time. Therefore, when the picture corresponding to the first type of subfield is driven with a decimal weight, the luminous time of the first type of subfield can be made less than the subfield unit scanning time, so as to reduce the influence of the motion blur phenomenon of the first type of subfield on the display effect.

The specific implementation methods of the above steps are introduced below.

Exemplarily, in S10, the pixel width of one frame of image is 12 bits, which means that one frame of image is divided into 12 subfields.

In S20 and S30, as shown in FIG12, a frame can be divided into 23 parts on average, and subfield 8 with a weight of 1 occupies one part, and the weights of subfields 0 to 11 increase proportionally, and the weights less than 1 are calculated as one weight. Subfields 0 to 7 can be selected as eight first-class subfields, and the first initial weights of the eight first-class subfields are all decimals less than 1. Exemplarily, the first initial weights of subfields 0 to 7 are 1/256, 1/128, 1/64, 1/32, 1/16, 1/8, 1/4, and 1/2, respectively.

In addition, the second initial weights of subfields 8 to 9 are integers. For example, the second initial weights of subfields 8 to 9 are 1, 2, 4, and 8, respectively.

The brightness waveform corresponding to Figure 12 is shown in Figure 13. For the subfield with a decimal weight, the non-luminous time is a black screen within the unit scanning time, so the brightness value will drop. On the other hand, since one frame is divided into 23 parts, if the initial display frequency is 100Hz, the actual flicker frequency is 2300Hz, which is much larger than the 1250Hz required to improve the flicker.

It should be noted that the vertical axis in FIG. 13 represents the transient brightness of the subfield, and the overall brightness of the subfield is the integral of the transient brightness and the light-emitting time of the subfield.

For subfields 0 to 7 in the first subfield category, especially subfield 0, although smearing will occur, it is difficult for the human eye to recognize it because the actual brightness is very low. In fact, all subfields with decimal weights will produce this effect.

For the same picture, the comparison of motion blur generated by analog driving and digital driving is shown in Figure 15, where T is the display time of one frame. Since it is not mandatory to light up all subfields during the display process, Figure 15 is only a comparison in the extreme case of displaying a pure white picture. In actual display, the ratio will be smaller than that shown in Figure 15.

However, as shown in Figure 13, the smears produced by integer subfields, i.e., subfields 8 to 11, can still be clearly recognized by the human eye. In digital driving, different grayscale effects are generated by superimposing different subfields, which means that only the smears of high grayscale pixels can be recognized.

At this time, the actual smear length D1 of a frame is as shown in formula (6):

D ₁ =B ₈ d ₈ +B ₉ d ₉ +B ₁₀ d ₁₀ +B ₁₁ d ₁₁ (6)

In some embodiments, as described above, the display includes pixels, and the pixels are connected to a first power supply terminal and a second power supply terminal, the first power supply terminal is used to provide a first voltage, and the second power supply terminal is used to provide a second voltage. By adjusting the difference between the first voltage and the second voltage, the transient brightness of the sub-field can be adjusted, so that when the overall brightness of the sub-field remains unchanged, the difference between the first voltage and the second voltage can be adjusted to adjust the luminous time of the sub-field.

Based on this technical concept, the driving method of the display provided in the embodiment of the present application also includes: selecting at least one subfield from multiple subfields as a second type of subfield; controlling the second initial weight of the second type of subfield to be an integer, and controlling the actual difference between the first voltage and the second voltage corresponding to at least one second type of subfield to be greater than the original difference v1 between the first voltage and the second voltage corresponding to the second type of subfield, and the actual difference between the first voltage and the second voltage corresponding to the first type of subfield is the original difference v1.

According to an embodiment of the present application, when the overall brightness of the subfield remains unchanged, the luminous time of the second type of subfield can be shortened by increasing the difference between the first voltage and the second voltage corresponding to the second type of subfield, thereby improving the influence of the motion blur phenomenon of the second type of subfield on the display effect.

Exemplarily, the subfield data shown in FIG. 12 may be optimized to obtain the subfield data shown in FIG. 16, and subfields 8 to 11 in FIG. 12 may be selected as four second-type subfields, that is, subfields 8 to 11 in FIG. 16 are four second-type subfields, and subfields 9 to 11 in the four second-type subfields may be selected to change the actual difference between the first voltage and the second voltage corresponding to them. Among them, the actual difference between the first voltage and the second voltage corresponding to subfields 0 to 8 is v1, the actual difference between the first voltage and the second voltage corresponding to subfield 9 is v2, the actual difference between the first voltage and the second voltage corresponding to subfield 10 is v3, and the actual difference between the first voltage and the second voltage corresponding to subfield 11 is v4, and v2, v3, and v4 are all greater than v1. The specific values corresponding to v2, v3, and v4 may be different or the same. For example, the transient brightness of subfield 9 under v2 is twice that of subfield 9 under v1, the transient brightness of subfield 10 under v3 is four times that of subfield 10 under v1, and the transient brightness of subfield 11 under v4 is eight times that of subfield 11 under v1. Then, the luminous time corresponding to subfield 9 to subfield 11 becomes half, one quarter and one eighth of the original, respectively.

The brightness waveforms of each subfield corresponding to the subfield data shown in Figure 16 are shown in Figure 17. Similarly, at this time, only subfields 8 to 11 can produce motion blur that can be perceived by the human eye, but due to the obvious difference in brightness, the motion blur phenomenon will be weakened, and the Motion Blur phenomenon produced by subfield 11 can be more clearly perceived by the human eye. For the same picture, the comparison of motion blur produced by analog drive and digital drive at this time is shown in Figure 18, where T is the display time of a frame. Since it is not mandatory for all subfields to be fully lit during the display process, Figure 18 is only a comparison of the extreme case of displaying a pure white picture, and the actual display process will only be less than this ratio.

However, as shown in Figure 17, the smears generated by subfields 8 to 11 can be weakened but can still be clearly recognized by the human eye. However, if the weight of the subfield is further reduced, although the efficiency will be reduced, the Motion Blur phenomenon will be better suppressed.

Based on this technical concept, in some embodiments, the display driving method provided by the embodiment of the present application further includes: controlling the second target weight of the second type of subfield to be 1/N1 of the second initial weight, where N1 is greater than 1. In the embodiment of the present application, the actual weight of the second type of subfield is further reduced, for example, the actual weight of at least part of the first type of subfield can be changed to a decimal, thereby better suppressing the motion blur phenomenon of part of the second type of subfield.

Exemplarily, the subfield data shown in FIG. 16 may be optimized to obtain the subfield data shown in FIG. 19 , and subfields 8 to 11 in FIG. 16 may be selected as four second-category subfields, and the second initial weights corresponding to subfields 8 to 11 in FIG. 16 are 1, 2, 4, and 8, respectively. The weights of subfields 8 to 11 in FIG. 16 may be changed to half of the original weights, respectively, to obtain second target weights of subfields 8 to 11 in FIG. 19 as four second-category subfields, respectively 1/2, 1, 2, and 4, so that the actual weight of subfield 8 becomes a decimal.

In some embodiments, in order to ensure the overall display effect of all subfields, the weight of the first subfield can also be reduced when the weight of the second subfield is reduced. The display driving method provided by the embodiment of the present application also includes: controlling the first target weight of the first subfield to be 1/N1 of the first initial weight.

Still taking Figures 16 and 19 as examples, subfields 0 to 7 in Figure 16 can be selected as eight second-category subfields, and the first initial weights corresponding to subfields 0 to 7 in Figure 16 are 1/256, 1/128, 1/64, 1/32, 1/16, 1/8, 1/4, and 1/2, respectively. The weights of subfields 0 to 7 in Figure 16 can be changed to half of the original weights, and the first target weights of subfields 0 to 7 in Figure 19 as eight first-category subfields are 1/512, 1/256, 1/128, 1/64, 1/32, 1/16, 1/8, and 1/4, respectively.

The subfield brightness waveform corresponding to the subfield data shown in Figure 19 is shown in Figure 20. Similarly, at this time, only subfields 9 to 11 can produce motion blur that can be perceived by the human eye, but due to the obvious difference in brightness, the Motion Blur phenomenon produced by subfield 11 can be more clearly perceived by the human eye. For the same picture, the comparison of motion blur produced by analog drive and digital drive at this time is shown in Figure 20, where T is the display time of a frame. Since it is not mandatory to light up all subfields during the display process, Figure 20 is only a comparison of the extreme case of displaying a pure white picture, and the actual display process will only be less than the ratio shown in Figure 20.

As shown in Figure 17, the smears produced by subfields 8 to 11 can be weakened but can still be clearly recognized by the human eye. However, if the number of subfields is further increased and the weights of the increased number of subfields are reduced, the dynamic false contour phenomenon can be improved.

Based on this technical concept, in some embodiments, the driving method of the display provided by the embodiment of the present application further includes: selecting at least one of the multiple second-type subfields as the second target subfield, controlling the actual number of the second target subfields to be M times of the original number, M>1; controlling the sum of the second target weights of the M second target subfields to be the second initial weight, and each second target weight is a decimal. In the embodiment of the present application, the actual number of the second target subfields increases, and the weight of the second target subfield after the increase is reduced to a decimal, thereby improving the motion blur phenomenon of the second target subfield and improving the dynamic false contour phenomenon.

Exemplarily, the subfield data shown in FIG. 16 can be optimized to obtain the subfield data shown in FIG. 21. Subfields 8 to 11 in FIG. 16 can be selected as four second-type subfields. The original numbers corresponding to subfields 8 to 11 in FIG. 16 are all 1. Subfield 8 with a weight of 1 in FIG. 16 can be selected as the second target subfield. In addition, M=2, and the number of scans becomes twice as much as before, and subfields 8 and 9 in FIG. 21 are obtained. Subfields 8 and 9 in FIG. 21 are two second target subfields. The sum of the second target weights of subfields 8 and 9 in FIG. 21 is equal to the second initial weight 1 of subfield 8 in FIG. 16. That is, subfield 8 with a weight of 1 in FIG. 16 becomes subfield 8 and subfield 9 with a weight of 1/2 in FIG. 21.

In addition, subfield 10 in FIG. 21 corresponds to subfield 9 in FIG. 16 , subfield 11 in FIG. 21 corresponds to subfield 10 in FIG. 16 , and subfield 12 in FIG. 21 corresponds to subfield 11 in FIG. 16 .

In some embodiments, the driving method of the display provided by the embodiment of the present application may further include: controlling the second target weights of the M second target subfields to be equal; and/or controlling the actual difference between the first voltage and the second voltage corresponding to the M second target subfields to be equal. In the embodiment of the present application, the overall brightness of each second target subfield after the increase in number is the same, and the sum of the brightness of the M second target subfields after the increase in number is equal to the brightness of the second target subfield when the original number is used.

Still taking Figures 16 and 21 as an example, subfield 8 with a weight of 1 in Figure 16 is used as the second target subfield, and the number of subfields with an original weight of 1 is doubled to obtain two second target subfields in Figure 21 (i.e., subfield 8 and subfield 9). The second target weights corresponding to subfield 8 and subfield 9 in Figure 21 are both 1/2, and the actual differences between the first voltage and the second voltage corresponding to subfield 8 and subfield 9 are both v1.

The subfield brightness waveform corresponding to the subfield data shown in Figure 21 is shown in Figure 22. Similarly, at this time, only subfields 10 to 12 can produce motion blur that can be perceived by the human eye, but due to the obvious difference in brightness, the Motion Blur phenomenon produced by subfield 12 can be more clearly perceived by the human eye. For the same picture, the comparison of motion blur produced by analog drive and digital drive at this time is shown in Figure 23, where T is the display time of a frame. Since all subfields are not required to be fully lit during the actual display process, Figure 23 is only a comparison of the extreme case of displaying a pure white picture, and the actual display process will only be less than the ratio shown in Figure 23.

In summary, in near-eye display environments (including AR/VR and other environments), digital driving has obvious improvements in motion blur compared to analog driving.

Based on the same inventive concept, the embodiment of the present application further provides a driver chip for driving a display. As shown in FIG. 24 , the driver chip 300 includes a division module 310 , a selection module 320 and a driving module 330 .

A division module 310, used for dividing a frame of image into a plurality of subfields;

A selection module 320, configured to select at least one subfield from a plurality of subfields as a first type of subfield;

The driving module 330 is used to control the first initial weight of the first type of subfield to be a decimal, so that the light emitting time of the first type of subfield is less than the subfield unit scanning time.

According to the driver chip provided in the embodiment of the present application, at least one is selected from multiple subfields as the first type of subfield, and the first initial weight of the first type of subfield is controlled to be a decimal. The scanning time corresponding to the subfield with a weight of 1 is the subfield unit scanning time, and the scanning time corresponding to the subfield with a decimal weight will be less than the subfield unit scanning time. Since the luminous time of a subfield is less than or equal to the scanning time of the subfield, the luminous time corresponding to the subfield with a decimal weight is less than the subfield unit scanning time. Therefore, when the picture corresponding to the first type of subfield is driven with a decimal weight, the luminous time of the first type of subfield can be made less than the subfield unit scanning time, so as to reduce the influence of the motion blur phenomenon of the first type of subfield on the display effect.

In some embodiments, the display includes a pixel, the pixel is connected to a first power terminal and a second power terminal, the first power terminal is used to provide a first voltage, and the second power terminal is used to provide a second voltage;

The selection module 320 is further used to: select at least one subfield from the multiple subfields as the second type of subfield;

The driving module 330 is also used to: control the second initial weight of the second type of subfield to be an integer, and control the actual difference between the first voltage and the second voltage corresponding to at least one second type of subfield to be greater than the original difference v1 between the first voltage and the second voltage corresponding to the second type of subfield, and the actual difference between the first voltage and the second voltage corresponding to the first type of subfield is the original difference v1.

In some embodiments, the driving module 330 is further configured to: control the second target weight of the second type of sub-field to be 1/N1 of the second initial weight, where N1 is greater than 1.

In some embodiments, the driving module 330 is further configured to: control the first target weight of the first type of subfield to be 1/N 1 of the first initial weight.

In some embodiments, the driving module 330 is further used to: select at least one of the plurality of second-type subfields as a second target subfield, and control the actual number of the second target subfields to be M times of the original number, M>1;

The sum of the second target weights of the M second target subfields is controlled to be the second initial weight.

In some embodiments, the driving module 330 is further used to: control the second target weights of the M second target subfields to be equal;

And/or, controlling the actual difference between the first voltage and the second voltage corresponding to the M second target subfields to be equal.

The driving chip provided in the embodiment of the present application can implement each process in the embodiment of the driving method of the display shown in Figure 11, and will not be described again here to avoid repetition.

Based on the same inventive concept, an embodiment of the present application further provides an electronic device. FIG25 shows a schematic diagram of the hardware structure of the electronic device provided in an embodiment of the present application.

The electronic device may include a processor 801 and a memory 802 storing computer program instructions.

Specifically, the processor 801 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present invention.

The memory 802 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 802 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 802 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 802 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 802 is a non-volatile solid-state memory.

In a particular embodiment, the memory 802 includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these. Exemplarily, the memory may include a non-volatile transient memory.

The processor 801 reads and executes the computer program instructions stored in the memory 802 to implement any one of the display panel driving methods in the above embodiments.

In one example, the electronic device may further include a communication interface 803 and a bus 810. As shown in FIG25, the processor 801, the memory 802, and the communication interface 803 are connected via the bus 810 and communicate with each other.

The communication interface 803 is mainly used to implement communication between various modules, devices, units and/or equipment in the embodiment of the present invention.

Bus 810 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 810 may include one or more buses. Although the embodiment of the present invention describes and shows a specific bus, the present invention considers any suitable bus or interconnection.

Exemplarily, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA).

The electronic device can execute the display driving method in the embodiment of the present application, thereby realizing the display driving method and driving chip described in combination with Figures 11 and 24.

The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the display driving method in the above embodiment can be implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the above-mentioned computer-readable storage medium may include a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc., which is not limited here.

An embodiment of the present application further provides a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the display driving method described in any one of the above embodiments is implemented.

It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Computer-readable medium" can include any medium capable of storing or transmitting information. Examples of computer-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

According to an embodiment of the present application, the computer-readable storage medium may be a non-transitory computer-readable storage medium.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and/or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and/or the block diagram and the combination of each square box in the flow chart and/or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function/action specified in one or more square boxes of the flow chart and/or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and/or the flow chart and the combination of the square boxes in the block diagram and/or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims (11)

1. A driving method of a display, comprising:

dividing a frame of image into a plurality of subfields;

selecting at least one subfield among the plurality of subfields as a first type subfield;

and controlling the first initial weight of the first type of subfields to be decimal, so that the light-emitting time of the first type of subfields is smaller than the unit scanning time of the subfields.

2. The method of claim 1, wherein the display comprises a pixel connected to a first power terminal for providing a first voltage and a second power terminal for providing a second voltage;

The driving method further includes:

Selecting at least one sub-field from the plurality of sub-fields as a second type of sub-field;

And controlling a second initial weight of the second type of subfields to be an integer, and controlling at least one actual difference value between the first voltage and the second voltage corresponding to the second type of subfields to be larger than an original difference value v1 between the first voltage and the second voltage corresponding to the second type of subfields, wherein the actual difference value between the first voltage and the second voltage corresponding to the first type of subfields is the original difference value v1.

3. The method of claim 2, wherein the driving method further comprises:

and controlling the second target weight of the second type of subfields to be 1/N1 of the second initial weight, wherein N1 is larger than 1.

4. A method according to claim 3, wherein the driving method further comprises:

and controlling the first target weight of the first type of subfields to be 1/N1 of the first initial weight.

5. The method of claim 2, wherein the driving method further comprises:

Selecting at least one of a plurality of second type subfields as a second target subfield, and controlling the actual number of the second target subfields to be M times of the original number of the second target subfields, wherein M is more than 1;

And controlling the sum of second target weights of the M second target subfields to be the second initial weight, wherein each second target weight is a decimal.

6. The method of claim 5, wherein the driving method further comprises:

and controlling the second target weights of the M second target subfields to be equal.

7. The method of claim 5, wherein the driving method further comprises:

And controlling the actual difference values of the first voltage and the second voltage corresponding to the M second target subfields to be equal.

8. A driver chip for driving a display, the driver chip comprising:

The dividing module is used for dividing one frame of image into a plurality of subfields;

a selecting module, configured to select at least one subfield from the plurality of subfields as a first type subfield;

The driving module is used for controlling the first initial weight of the first type of subfields to be decimal so that the light-emitting time of the first type of subfields is smaller than the unit scanning time of the subfields.

9. An electronic device, comprising:

a processor and a memory storing computer program instructions;

the processor reads and executes the computer program instructions to implement the method of driving a display as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, on which computer program instructions are stored which, when executed by a processor, implement a method of driving a display according to any one of claims 1 to 7.

11. A computer program product comprising computer program instructions which, when executed by a processor, implement a method of driving a display as claimed in any one of claims 1 to 7.