CN117765869A - Display panel compensation method and display device - Google Patents
Display panel compensation method and display device Download PDFInfo
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Abstract
The application discloses a compensation method of a display panel and a display device, wherein the compensation method comprises the following steps: detecting the anode voltage of a light emitting device of a pixel circuit of at least one display panel corresponding to a current frame display picture displayed by the display panel and M frames of display pictures before the current frame display picture; according to the detected anode voltage, calculating a voltage difference value between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of M frames before the display picture of the current frame; comparing the voltage difference with a preset value; when the voltage difference is greater than the preset value, compensating the anode voltage of the light emitting device according to the voltage difference when the data voltage of the display screen of the next frame is input to the pixel circuit.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a compensation method of a display panel and a display device.
Background
MLED direct display is used as a novel display technology, has the characteristics of high color gamut and high refresh rate, and has good application prospect in indoor high-order scenes. However, due to various reasons such as manufacturing process and sorting, the LED chips with the MLED directly display are different when leaving the factory, so that the Mura phenomenon of the MLED directly appears.
In order to solve the Mura phenomenon caused by the difference of the LED chips of the MLED direct display, the existing scheme generally adopts a DeMura algorithm. The principle of solving the Mura phenomenon of MLED direct display by the DeMura algorithm is as follows: the method comprises the steps of photographing a brightness image of an MLED direct display through a camera, screening brightness differences of different LED lamp beads of the MLED direct display according to the brightness image, compensating through a DeMura algorithm, and enabling the bright LED lamp beads to be brighter and the dark LED lamp beads to be darker. However, since the voltage drop of the LED lamp beads of the MLED direct display can be changed along with the change of the temperature, the MLED direct display can be compensated by using a DeMura algorithm only after the LED lamp beads are aged stably, so that the MLED direct display cannot be compensated by using the DeMura algorithm in the period from the initial stage of screen lighting to the aging of the LED lamp beads of the MLED direct display, and the MLED direct display can have the Mura phenomenon caused by the temperature rise of the LED lamp beads.
Disclosure of Invention
The embodiment of the application provides a compensation method of a display panel and a display device, so as to improve Mura phenomenon caused by temperature rise of LED lamp beads in MLED direct display.
In a first aspect, embodiments of the present application provide a compensation method of a display panel, the compensation method including:
detecting the anode voltage of a light emitting device of a pixel circuit of at least one display panel corresponding to a current frame display picture displayed by the display panel and M frames of display pictures before the current frame display picture;
according to the detected anode voltage, calculating a voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of M frames before the display picture of the current frame;
comparing the voltage difference with a preset value;
when the voltage difference is greater than the preset value, compensating the anode voltage of the light emitting device according to the voltage difference when the data voltage of the display screen of the next frame is input to the pixel circuit.
Further, the calculating, according to the detected anode voltage, a voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of M frames preceding the display picture of the current frame includes:
according to the detected anode voltage, calculating a first voltage difference value between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of an M frame before the display picture of the current frame;
the comparing the voltage difference value with a preset value comprises:
comparing the first voltage difference value with the preset value.
Further, calculating, according to the detected anode voltage, a voltage difference between the anode voltage of at least one light emitting device corresponding to the display frame of the current frame and the anode voltage of at least one light emitting device corresponding to the display frame of M frames preceding the display frame of the current frame further includes:
calculating a second voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of the M-1 st frame before the display picture of the current frame according to the detected anode voltage;
the comparing the voltage difference value with a preset value further comprises:
comparing the second voltage difference value with the preset value.
Further, when the voltage difference is greater than the preset value and the data voltage of the display screen of the next frame is input to the pixel circuit, compensating the anode voltage of the light emitting device according to the voltage difference includes:
and under the condition that the first voltage difference value and the second voltage difference value are larger than the preset value, when the data voltage of the display picture of the next frame is input to the pixel circuit, compensating the first voltage difference value to the anode of the light emitting device.
Further, the display panel includes a sensing signal line, a transmission signal line and a source driver, the pixel circuit includes a sensing transistor, a control end of the sensing transistor is electrically connected to the sensing signal line, a signal input end of the sensing transistor is electrically connected to an anode of the light emitting device, a signal output end of the sensing transistor is electrically connected to one end of the transmission signal line, the other end of the transmission signal line is electrically connected to the source driver, and detecting a current frame display screen displayed on the display panel and at least one anode voltage of the light emitting device corresponding to an M frame preceding the current frame display screen, includes:
detecting the voltage of a signal output end of at least one sensing transistor corresponding to a current frame display picture displayed by the display panel and M frames of display pictures before the current frame display picture;
and acquiring the anode voltage of the light emitting device according to the voltage of the signal output end of the sensing transistor.
In a second aspect, embodiments of the present application provide a display device including a controller, a source driver electrically connected to the controller, and a display panel electrically connected to the source driver, the display device further including:
the detection module is arranged in the source driver and is used for detecting the current frame display picture displayed by the display panel and the anode voltage of the light emitting device of the pixel circuit of at least one display panel corresponding to M frames of display pictures before the current frame display picture;
the calculation module is arranged in the controller and is used for calculating a voltage difference value between the anode voltage of at least one light-emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light-emitting device corresponding to the display picture of M frames before the display picture of the current frame according to the detected anode voltage;
the comparison module is arranged in the controller and is used for comparing the voltage difference value with a preset value;
the compensation module is arranged in the controller and is used for compensating the anode voltage of the light emitting device according to the voltage difference value when the data voltage of the display picture of the next frame is input to the pixel circuit under the condition that the voltage difference value is larger than the preset value.
Further, the calculation module is further configured to calculate, according to the detected anode voltage, a first voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of an mth frame before the display picture of the current frame;
the comparison module is also used for comparing the first voltage difference value with the preset value.
Further, the calculation module is further configured to calculate, according to the detected anode voltage, a second voltage difference between the anode voltage of at least one light emitting device corresponding to the display frame of the current frame and the anode voltage of at least one light emitting device corresponding to the display frame of the M-1 st frame before the display frame of the current frame;
the comparison module is also used for comparing the second voltage difference value with the preset value.
Further, the compensation module is further configured to compensate the first voltage difference to an anode of the light emitting device when a data voltage of the display screen of a next frame is input to the pixel circuit under a condition that the first voltage difference and the second voltage difference are both greater than the preset value.
Further, the display panel comprises a sensing signal line and a transmission signal line, the pixel circuit comprises a sensing transistor, a control end of the sensing transistor is electrically connected with the sensing signal line, a signal input end of the sensing transistor is electrically connected with an anode of the light emitting device, a signal output end of the sensing transistor is electrically connected with one end of the transmission signal line, and the other end of the transmission signal line is electrically connected with the source driver;
the detection module is further configured to detect a current frame of display image displayed on the display panel, and voltage of a signal output end of at least one sensing transistor corresponding to M frames of display images before the current frame of display image, and obtain the anode voltage of the light emitting device according to the voltage of the signal output end of the sensing transistor.
The beneficial effects of this application:
the application provides a compensation method of a display panel and a display device, wherein the compensation method is used for compensating anode voltage of a light emitting device of a pixel circuit of the display panel, and the anode voltage of the light emitting device of the pixel circuit of at least one display panel corresponding to a current frame display picture displayed by the display panel and M frames of display pictures before the current frame display picture is detected; according to the detected anode voltage, calculating a voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of M frames before the display picture of the current frame; comparing the voltage difference with a preset value; when the voltage difference is larger than the preset value and the data voltage of the display picture of the next frame is input to the pixel circuit, the display panel can compensate the anode voltage of the light emitting device according to the voltage difference, so that the Mura phenomenon of the display panel, caused by the voltage drop of the anode voltage of the light emitting device due to the temperature change of the light emitting device, of the display picture of the next frame is improved, and the display effect of the display panel is improved.
Drawings
FIG. 1 is a flow chart of a compensation method of a display panel in the present application;
FIG. 2 is a schematic diagram of a display device in the present application;
FIG. 3 is a schematic diagram of a pixel circuit in the present application;
fig. 4 is a timing chart of the pixel circuit shown in fig. 3.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The technical solutions described below are only for explaining and explaining the idea of the present application and should not be construed as limiting the scope of protection of the present application.
Furthermore, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The term "plurality" and similar words mean two or more, unless specifically defined otherwise.
In order to solve the Mura phenomenon caused by the difference of the LED chips of the MLED direct display, the existing scheme generally adopts a DeMura algorithm. The principle of solving the Mura phenomenon of MLED direct display by the DeMura algorithm is as follows: the method comprises the steps of photographing a brightness image of an MLED direct display through a camera, screening brightness differences of different LED lamp beads of the MLED direct display according to the brightness image, compensating through a DeMura algorithm, and enabling the bright LED lamp beads to be brighter and the dark LED lamp beads to be darker. However, since the voltage drop of the LED lamp beads of the MLED direct display can be changed along with the change of the temperature, the MLED direct display can be compensated by using a DeMura algorithm only after the LED lamp beads are aged stably, so that the MLED direct display cannot be compensated by using the DeMura algorithm in the period from the initial stage of screen lighting to the aging of the LED lamp beads of the MLED direct display, and the MLED direct display can have the Mura phenomenon caused by the temperature rise of the LED lamp beads.
Thus, referring to fig. 2 and 3, a first embodiment of the present application provides a display device, which includes a controller, a source driver S-IC electrically connected to the controller, and a display panel electrically connected to the source driver S-IC, wherein the display panel includes a pixel circuit, a sensing signal Line, a transmission signal Line, and the pixel circuit includes a light emitting device LED and a sensing transistor T3.
Specifically, the control end of the sensing transistor T3 is electrically connected to the sensing signal Line, the signal input end of the sensing transistor T3 is electrically connected to the anode of the light emitting device LED, the signal output end of the sensing transistor T3 is electrically connected to one end of the transmission signal Line, and the other end of the transmission signal Line is electrically connected to the source driver S-IC.
In this embodiment, the display panel further includes a driving voltage input terminal Gate Line, a Data voltage input terminal Data Line, and a power voltage input terminal OVDD, the pixel circuit further includes a writing transistor T1, a driving transistor T2, and a capacitor C, the control terminal of the writing transistor T1 is electrically connected to the driving voltage input terminal Gate Line, the first terminal of the writing transistor T1 is electrically connected to the Data voltage input terminal Data Line, the second terminal of the writing transistor T1 is electrically connected to the control terminal of the driving transistor T2, the first terminal of the driving transistor T2 is electrically connected to the power voltage input terminal OVDD, the second terminal of the driving transistor T2 is electrically connected to the anode of the light emitting device LED, the first terminal of the capacitor C is electrically connected to the control terminal of the driving transistor T2, and the second terminal of the capacitor C is electrically connected to the anode of the light emitting device LED.
In this embodiment, the display device further includes a first switch S1 and a second switch S2, wherein a first end of the first switch S1 is electrically connected to the transmission signal line, the other end of the first switch S1 is electrically connected to the source driver S-IC, a first end of the second switch S2 is electrically connected to the transmission signal line, and the other end of the second switch S2 is electrically connected to the source driver S-IC. By setting the first switch S1, the voltage of the anode voltage Vs of the LED can be reset to a preset Vref voltage during the pre-charging stage of the pixel circuit, so as to ensure that the detected anode voltage Vs of the LED can be more accurate.
Referring to fig. 2, the display device further includes: the device comprises a detection module, a calculation module, a comparison module and a compensation module; the detection module is arranged in the source driver S-IC, and the calculation module, the comparison module and the compensation module are all arranged in the controller. Specifically, the detection module is configured to detect an anode voltage Vs of an LED of a pixel circuit of at least one display panel corresponding to a current frame display screen displayed by the display panel and M frames of display screens before the current frame display screen; the calculation module is used for calculating a voltage difference value between the anode voltage Vs of at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of at least one light emitting device LED corresponding to the M frame display picture before the current frame display picture according to the detected anode voltage; the comparison module is used for comparing the voltage difference value with a preset value; the compensation module is used for compensating the anode voltage Vs of the LED according to the voltage difference when the data voltage of the next frame of display picture is input to the pixel circuit under the condition that the voltage difference is larger than a preset value.
Through the scheme, when the voltage difference is larger than the preset value and the data voltage of the next frame of display picture is input to the pixel circuit, the display panel can compensate the anode voltage Vs of the light emitting device LEDs according to the voltage difference, so that the Mura phenomenon of the display panel caused by the voltage drop of the anode voltage Vs of the light emitting device LEDs due to the temperature change of the light emitting device LEDs of the next frame of display picture is improved, and the display effect of the display panel is improved.
In this embodiment, the detection module is an analog-to-digital converter.
In this embodiment, the calculating module is further configured to calculate, according to the detected anode voltage, a first voltage difference between the anode voltage Vs of the at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of the at least one light emitting device LED corresponding to the M-th frame display picture before the current frame display picture; the comparison module is also used for comparing the first voltage difference value with a preset value.
It should be noted that, although there is a certain voltage drop from the voltage of the anode voltage Vs of the light emitting device LED to the source driver S-IC, since the calculated first voltage difference is the difference Δvt between two frames of display images, the line loss can be improved, so as to obtain a relatively accurate first voltage difference.
In this embodiment, the compensation module is further configured to compensate the first voltage difference to the anode of the light emitting device LED when the data voltage of the next frame of display screen is input to the pixel circuit if the first voltage difference is greater than a preset value.
In this embodiment, M is greater than 0, and M is a positive integer. When M is 1, the number of frames of the display screen corresponding to the anode voltage Vs of the light emitting device LED to be calculated at this time is 1.
Referring to fig. 4, in the precharge phase, the control terminal of the sensing transistor T3 and the Gate Line of the driving voltage input terminal are set to be high, the Data voltage input terminal Data Line input voltage is 0, the writing transistor T1 and the sensing transistor T3 are both in an on state, and the driving transistor T2 is turned off; meanwhile, the first switch S1 is set high, the second switch S2 is set low, the voltage Vg at the control terminal of the driving transistor T2 is equal to the voltage of the Data voltage input terminal Data Line, the voltage of the anode voltage Vs of the light emitting device LED is equal to the voltage of the first switch Vs1, that is, the voltage of the anode voltage Vs of the light emitting device LED and the voltage of the first switch Vs1 are both the preset Vref voltage.
In the display stage, the driving voltage input terminal Gate Line is set to a high level, the Data voltage input terminal Data Line inputs a Data voltage signal, the driving transistor T2 is turned on, and the power supply voltage acts from the anode of the light emitting device LED to which the power supply voltage input terminal OVDD acts, so that the light emitting device LED operates.
In the back transmission stage, the control ends of the driving voltage input end Gate Line and the sensing transistor T3 are set to be high level, the transistor T1 is written, the sensing transistor T3 is in an open state, meanwhile, the second switch S2 is set to be high, the display device is sampled at the moment, the controller reads the voltage Vs2 of the anode voltage Vs point of the light emitting device LED of the pixel circuit of the display panel detected by the detection module in the source driver S-IC, and accordingly the difference value between two frames of display pictures is determined according to the voltage difference value between Vs2 and Vs1, namely delta Vt=Vs 2-Vs1; after the sampling is finished, the first switch S1 is set high, the Data voltage input terminal Data Line is input with a voltage of 0, the driving transistor T2 is kept turned off, so that the voltage at the anode voltage Vs point of the light emitting device LED is reset to Vref, then the control terminal of the sensing transistor T3 and the driving voltage input terminal Gate Line are set to low level, and the writing transistor T1 and the sensing transistor T3 are also set to low level.
When the display device works, the transmission signal line collects the voltage of the output end of the sensing transistor T3 and transmits the voltage to the controller for calculation, the controller compares the voltage of the anode of the light emitting device LED corresponding to the current frame display picture with the voltage of the anode of the light emitting device LED corresponding to the Mth frame display picture before the current frame display picture, if the voltage difference between the voltage and the voltage is larger than a preset value, when the data voltage of the next frame display picture is input to the pixel circuit, the anode voltage Vs of the light emitting device LED is compensated according to the voltage difference, and if the voltage difference between the voltage and the voltage is not larger than the preset value, and when the data voltage of the next frame display picture is input to the pixel circuit, the anode voltage Vs of the light emitting device LED is not compensated.
In this embodiment, the calculating module is further configured to calculate, according to the detected anode voltage, a second voltage difference between the anode voltage Vs of the at least one light emitting device LED corresponding to the current frame display screen and the anode voltage Vs of the at least one light emitting device LED corresponding to the M-1 st frame display screen before the current frame display screen; the comparison module is also used for comparing the second voltage difference value with a preset value.
It should be noted that, although there is a certain voltage drop from the voltage of the anode voltage Vs of the light emitting device LED to the source driver S-IC, since the calculated second voltage difference is the difference Δvt between two frames of display pictures, the line loss can be improved, so as to obtain an accurate second voltage difference.
In this embodiment, the compensation module is further configured to compensate the first voltage difference to the anode of the light emitting device LED when the data voltage of the next frame of display screen is input to the pixel circuit if the first voltage difference and the second voltage difference are both greater than the preset value.
When the display device works, the transmission signal line collects the voltage of the output end of the sensing transistor T3 and transmits the voltage to the processor for calculation, the processor compares the voltage of the anode of the light emitting device LED corresponding to the current frame display picture with the voltage of the anode of the light emitting device LED corresponding to the M-1 th frame display picture before the current frame display picture, if the voltage difference between the voltage and the voltage is larger than a preset value, when the data voltage of the next frame display picture is input to the pixel circuit, the anode voltage Vs of the light emitting device LED is compensated according to the voltage difference, and if the voltage difference between the voltage and the voltage is not larger than the preset value, and when the data voltage of the next frame display picture is input to the pixel circuit, the anode voltage Vs of the light emitting device LED is not compensated.
In this embodiment, the detection module is further configured to detect a voltage of the signal output terminal of the at least one sensing transistor T3 corresponding to the current frame display screen displayed on the display panel and the M frame display screen before the current frame display screen, and obtain the anode voltage Vs of the light emitting device LED according to the voltage of the signal output terminal of the sensing transistor T3.
A second embodiment of the present application provides a compensation method for a display panel, the compensation method being used for compensating an anode voltage Vs of a light emitting device LED of a pixel circuit of the display panel, referring to fig. 1 and 3, the compensation method comprising the steps of:
s100: the anode voltage Vs of the LED of the pixel circuit of at least one display panel corresponding to the current frame display picture displayed by the display panel and the M frame display pictures before the current frame display picture is detected.
The display panel includes a display device and a pixel circuit, the display device includes a sensing signal Line, a transmission signal Line, and a source driver S-IC, the pixel circuit includes a light emitting device LED and a sensing transistor T3, and the display device is connected to the pixel circuit to compensate an anode voltage Vs of the light emitting device LED of the pixel circuit. Specifically, the control end of the sensing transistor T3 is electrically connected to the sensing signal Line, the signal input end of the sensing transistor T3 is electrically connected to the anode of the light emitting device LED, the signal output end of the sensing transistor T3 is electrically connected to one end of the transmission signal Line, and the other end of the transmission signal Line is electrically connected to the source driver S-IC. Therefore, when the anode voltage Vs of the light emitting device LED is detected, the voltage of the signal output end of the sensing transistor T3 corresponding to the current frame display screen displayed by the display panel and the M frame display screen before the current frame display screen is detected, and then the anode voltage Vs of the light emitting device LED is obtained according to the voltage of the signal output end of the sensing transistor T3, so that the anode voltage Vs of the light emitting device LED can be obtained, that is, the anode voltage Vs of the light emitting device LED is the voltage data Vdata of the current frame display screen.
It should be noted that the compensation method of the display panel is a Demura algorithm.
S200: and calculating a voltage difference between the anode voltage Vs of at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of at least one light emitting device LED corresponding to the M frame display picture before the current frame display picture according to the detected anode voltage.
In this step, M is greater than 0, and M is a positive integer. When M is 1, the number of frames of the display screen corresponding to the anode voltage Vs of the light emitting device LED to be calculated at this time is 1.
S300: comparing the voltage difference with a preset value.
It should be noted that, the voltage difference value obtained through calculation and the preset value are both accurate values, so that the comparison result can be intuitively obtained by comparing the voltage difference value with the preset value.
S400: when the voltage difference is greater than a preset value, the anode voltage Vs of the light emitting device LED is compensated according to the voltage difference when the data voltage of the next frame display screen is input to the pixel circuit.
It should be noted that in this embodiment, there are three cases where the voltage difference is smaller than the preset value, the voltage difference is equal to the preset value, and when the voltage difference is smaller than the preset value or the voltage difference is equal to the preset value, the voltage of the anode of the light emitting device LED meets the requirement, so that the voltage of the anode of the light emitting device LED does not need to be compensated, and only when the voltage difference is greater than the preset value, the anode voltage Vs of the light emitting device LED is compensated.
In this embodiment, step S200 includes: according to the detected anode voltage, calculating a first voltage difference value between the anode voltage Vs of at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of at least one light emitting device LED corresponding to the M-th frame display picture before the current frame display picture; step S300 includes: comparing the first voltage difference with a preset value.
It should be noted that, since the first voltage difference between the anode voltage Vs of at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of at least one light emitting device LED corresponding to the mth frame display picture before the current frame display picture is calculated, and the first voltage difference is compared with the preset value, it can be determined whether the anode voltage Vs of the light emitting device LED corresponding to the current frame display picture meets the requirement compared with the anode voltage Vs of the light emitting device LED of the mth frame display picture before the current frame display picture.
In this embodiment, step S400 includes: when the first voltage difference is greater than a preset value, the first voltage difference is compensated to the anode of the light emitting device LED when the data voltage of the next frame display screen is input to the pixel circuit.
In this embodiment, step S200 further includes: according to the detected anode voltage, calculating a second voltage difference value between the anode voltage Vs of at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of at least one light emitting device LED corresponding to the M-1 th frame display picture before the current frame display picture; step S300 further includes: comparing the second voltage difference with a preset value.
It should be noted that, since the first voltage difference between the anode voltage Vs of at least one light emitting device LED corresponding to the current frame display picture and the anode voltage Vs of at least one light emitting device LED corresponding to the M-1 th frame display picture before the current frame display picture is calculated, and the first voltage difference is compared with the preset value, it can be determined whether the anode voltage Vs of the light emitting device LED corresponding to the current frame display picture meets the requirement compared with the anode voltage Vs of the light emitting device LED of the M-1 th frame display picture before the current frame display picture.
In this embodiment, step S400 includes: when the data voltage of the next frame of display picture is input to the pixel circuit under the condition that the first voltage difference value and the second voltage difference value are both larger than the preset value, the first voltage difference value is compensated to the anode of the light emitting device LED. Through setting up under the condition that first voltage difference and second voltage difference all are greater than the default, can avoid just comparing first voltage difference with the default and leak the condition of judging to promote the positive pole of light emitting device LED accuracy when compensating voltage.
In step S400, the voltage input to the next frame of display screen is the voltage data Vdata of the current frame of display screen and the voltage data Vt to be compensated, i.e. v=vdata+vt.
The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. A compensation method for a display panel, the compensation method comprising the steps of:
detecting the anode voltage of a light emitting device of a pixel circuit of at least one display panel corresponding to a current frame display picture displayed by the display panel and M frames of display pictures before the current frame display picture;
according to the detected anode voltage, calculating a voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of M frames before the display picture of the current frame;
comparing the voltage difference with a preset value;
when the voltage difference is greater than the preset value, compensating the anode voltage of the light emitting device according to the voltage difference when the data voltage of the display screen of the next frame is input to the pixel circuit.
2. The method according to claim 1, wherein calculating a voltage difference between the anode voltage of at least one of the light emitting devices corresponding to the display screen of the current frame and the anode voltage of at least one of the light emitting devices corresponding to the display screen of M frames preceding the display screen of the current frame based on the detected anode voltage comprises:
according to the detected anode voltage, calculating a first voltage difference value between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of an M frame before the display picture of the current frame;
the comparing the voltage difference value with a preset value comprises:
comparing the first voltage difference value with the preset value.
3. The method according to claim 2, wherein calculating a voltage difference between the anode voltage of at least one of the light emitting devices corresponding to the display screen of the current frame and the anode voltage of at least one of the light emitting devices corresponding to the display screen of M frames preceding the display screen of the current frame based on the detected anode voltage further comprises:
calculating a second voltage difference between the anode voltage of at least one light emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light emitting device corresponding to the display picture of the M-1 st frame before the display picture of the current frame according to the detected anode voltage;
the comparing the voltage difference value with a preset value further comprises:
comparing the second voltage difference value with the preset value.
4. The method according to claim 3, wherein when the voltage difference is greater than the preset value and the data voltage of the display screen of the next frame is input to the pixel circuit, the compensating the anode voltage of the light emitting device according to the voltage difference comprises:
and under the condition that the first voltage difference value and the second voltage difference value are larger than the preset value, when the data voltage of the display picture of the next frame is input to the pixel circuit, compensating the first voltage difference value to the anode of the light emitting device.
5. The method according to claim 4, wherein the display panel includes a sensing signal line, a transmission signal line, and a source driver, the pixel circuit includes a sensing transistor, a control terminal of the sensing transistor is electrically connected to the sensing signal line, a signal input terminal of the sensing transistor is electrically connected to an anode of the light emitting device, a signal output terminal of the sensing transistor is electrically connected to one end of the transmission signal line, and the other end of the transmission signal line is electrically connected to the source driver;
the detecting the anode voltage of at least one light emitting device corresponding to a current frame display screen displayed by the display panel and M frames of the display screen before the current frame display screen includes:
detecting the voltage of a signal output end of at least one sensing transistor corresponding to a current frame display picture displayed by the display panel and M frames of display pictures before the current frame display picture;
and acquiring the anode voltage of the light emitting device according to the voltage of the signal output end of the sensing transistor.
6. A display device including a controller, a source driver electrically connected to the controller, and a display panel electrically connected to the source driver, the display device further comprising:
the detection module is arranged in the source driver and is used for detecting the current frame display picture displayed by the display panel and the anode voltage of the light emitting device of the pixel circuit of at least one display panel corresponding to the M frames of display pictures before the current frame display picture;
the calculation module is arranged in the controller and is used for calculating a voltage difference value between the anode voltage of at least one light-emitting device corresponding to the display picture of the current frame and the anode voltage of at least one light-emitting device corresponding to the display picture of M frames before the display picture of the current frame according to the detected anode voltage;
the comparison module is arranged in the controller and is used for comparing the voltage difference value with a preset value;
the compensation module is arranged in the controller and is used for compensating the anode voltage of the light emitting device according to the voltage difference value when the data voltage of the display picture of the next frame is input to the pixel circuit under the condition that the voltage difference value is larger than the preset value.
7. The display apparatus according to claim 6, wherein the calculation module is further configured to calculate, based on the detected anode voltage, a first voltage difference between the anode voltage of at least one of the light emitting devices corresponding to the display screen of the current frame and the anode voltage of at least one of the light emitting devices corresponding to the display screen of an mth frame preceding the display screen of the current frame;
the comparison module is also used for comparing the first voltage difference value with the preset value.
8. The display apparatus according to claim 7, wherein the calculation module is further configured to calculate, based on the detected anode voltage, a second voltage difference between the anode voltage of at least one of the light emitting devices corresponding to the display screen of the current frame and the anode voltage of at least one of the light emitting devices corresponding to the display screen of an M-1 st frame preceding the display screen of the current frame;
the comparison module is also used for comparing the second voltage difference value with the preset value.
9. The display apparatus according to claim 8, wherein the compensation module is further configured to compensate the first voltage difference to the anode of the light emitting device when the data voltage of the display screen of the next frame is input to the pixel circuit if the first voltage difference and the second voltage difference are both greater than the preset value.
10. The display device according to claim 9, wherein the display panel includes a sense signal line, a transmission signal line, the pixel circuit includes a sense transistor, a control terminal of the sense transistor is electrically connected to the sense signal line, a signal input terminal of the sense transistor is electrically connected to an anode of the light emitting device, a signal output terminal of the sense transistor is electrically connected to one end of the transmission signal line, and the other end of the transmission signal line is electrically connected to the source driver;
the detection module is used for detecting the current frame display picture displayed by the display panel, the voltage of the signal output end of at least one sensing transistor corresponding to the M frames of the display picture before the current frame display picture, and obtaining the anode voltage of the light emitting device according to the voltage of the signal output end of the sensing transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311816184.4A CN117765869A (en) | 2023-12-26 | 2023-12-26 | Display panel compensation method and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311816184.4A CN117765869A (en) | 2023-12-26 | 2023-12-26 | Display panel compensation method and display device |
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| CN117765869A true CN117765869A (en) | 2024-03-26 |
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