Display panel brightness compensation method, system, computer device and storage medium

Abstract

The present invention discloses a brightness compensation method, system, computer device and storage medium for a display panel, including: obtaining multiple first detection currents and second detection currents, the multiple first detection currents are respectively the currents output to the display panel by a power management chip detected by a current detection device when sub-pixels of multiple colors are displayed individually, and the second detection current is the current output to the display panel by the power management chip detected by the current detection device when sub-pixels of multiple colors are displayed together; based on the multiple first detection currents, the second detection currents and the power supply voltage, the currents flowing through the sub-pixels of multiple colors when the sub-pixels of multiple colors are displayed together are calculated; based on the multiple first detection currents and the target currents of the sub-pixels of multiple colors, the compensation coefficients of the sub-pixels of multiple colors are calculated, so as to perform brightness compensation on the sub-pixels of multiple colors according to the compensation coefficients of the sub-pixels of multiple colors, thereby reducing the color deviation problem of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a brightness compensation method, system, computer device and storage medium for a display panel. Background Art

[0002] With the rapid development of display technology, people are demanding increasingly high-quality display panels. Organic Light-Emitting Diode (OLED) display panels, among others, offer broad application prospects due to their high brightness, lightweight design, fast response time, and ease of color and large-screen display. However, existing OLED display panels suffer from color shift, which affects their display quality. Summary of the Invention

[0003] The present invention discloses a brightness compensation method, system, computer device and storage medium for a display panel, so as to solve the color shift problem of an OLED display panel and improve the display effect.

[0004] In a first aspect, the present invention discloses a brightness compensation method for a display panel, wherein the display panel is electrically connected to a power management chip, and the power management chip is used to provide a power supply voltage to the display panel. The brightness compensation method includes: obtaining multiple first detection currents and second detection currents in any display area of ​​the display panel, the multiple first detection currents being the currents output by the power management chip to the display panel detected by a current detection device when sub-pixels of multiple colors in the display area are displayed separately, and the second detection current being the current output by the power management chip to the display panel detected by the current detection device when sub-pixels of multiple colors in the display area are displayed together; calculating target currents for sub-pixels of multiple colors in the display area based on the multiple first detection currents, the second detection currents, and the power supply voltage, the target currents being the currents flowing through the sub-pixels of multiple colors in the display area when the sub-pixels of multiple colors in the display area are displayed together; and calculating compensation coefficients for the sub-pixels of multiple colors in the display area based on the multiple first detection currents and the target currents for the sub-pixels of multiple colors in the display area, so as to perform brightness compensation on the sub-pixels of multiple colors in the display area according to the compensation coefficients for the sub-pixels of multiple colors in the display area.

[0005] Optionally, calculating the target currents of the sub-pixels of multiple colors in the display area based on the multiple first detection currents, the second detection current and the power supply voltage includes: calculating the equivalent resistance of the sub-pixels of multiple colors in the display area based on the multiple first detection currents, the second detection current and the power supply voltage; calculating the target currents of the sub-pixels of multiple colors in the display area based on the second detection current and the equivalent resistance of the sub-pixels of multiple colors in the display area, so as to more accurately calculate the target currents of the sub-pixels by calculating the equivalent resistance of the sub-pixels.

[0006] Optionally, calculating the equivalent resistance of sub-pixels of multiple colors in the display area based on the multiple first detection currents, the second detection currents, and the power supply voltage includes: substituting the voltage values ​​of the multiple first detection currents, the second detection currents, and the power supply voltage into the following formula U / (R L +R R )=I R 、U / (R L +R G )=I G 、U / (R L +R B )=I B 、U / (R L +R 并 )=I W and R 并 =R R *R G *R B / (R R *R G +R G *R B +R R *R B ), calculate the equivalent resistance of the sub-pixels of multiple colors in the display area; wherein, I R , I B , I G Respectively represent the multiple first detection currents, I W represents the second detection current, U represents the voltage value of the power supply voltage, R R 、R G 、R B Respectively represent the equivalent resistance of the sub-pixels of multiple colors in the display area, R 并 represents the parallel resistance of the sub-pixels of multiple colors in the display area, R L The equivalent resistance of the circuit between the power management chip and the display panel is represented so that the equivalent resistance of the sub-pixel can be simply and efficiently calculated through the voltage, current and resistance calculation formula.

[0007] Optionally, the target current of the sub-pixels of multiple colors in the display area is calculated based on the second detection current and the equivalent resistance of the sub-pixels of multiple colors in the display area, including: calculating the parallel resistance of the sub-pixels of multiple colors in the display area based on the equivalent resistance of the sub-pixels of multiple colors in the display area; and calculating the target current of the sub-pixels of multiple colors in the display area based on the proportional relationship between the second detection current, the parallel resistance and the equivalent resistance of the sub-pixels of multiple colors in the display area, so as to simply and efficiently calculate the target current of the sub-pixels of multiple colors through the proportional relationship between the parallel resistance and the equivalent resistance of the sub-pixels of multiple colors.

[0008] Optionally, calculating the parallel resistance of the sub-pixels of multiple colors in the display area based on the equivalent resistances of the sub-pixels of multiple colors in the display area includes: substituting the equivalent resistances of the sub-pixels of multiple colors in the display area into the following formula R 并 =R R *R G *R B / (R R *R G +R G *R B +R R *R B ), calculate the parallel resistance of the sub-pixels of multiple colors in the display area, where R R 、R G 、R B Respectively represent the equivalent resistance of the sub-pixels of multiple colors in the display area, R 并 represents the parallel resistance of the sub-pixels of multiple colors in the display area; the target current of the sub-pixels of multiple colors in the display area is calculated according to the proportional relationship among the second detection current, the parallel resistance, and the equivalent resistance of the sub-pixels of multiple colors in the display area, comprising: substituting the second detection current, the parallel resistance, and the equivalent resistance of the sub-pixels of multiple colors in the display area into the following formula I R ′=I W *(R 并 / R R ), I G ′=I W *(R 并 / R G ) and I B ′=I W *(R 并 / R B ), calculate and obtain multiple target currents of sub-pixels of multiple colors in the display area; wherein, I R , I B, I G Respectively represent the multiple first detection currents, I W represents the second detection current, I R ′、I B ′、I G ' represents the target currents of the sub-pixels of multiple colors in the display area respectively. The target currents of the sub-pixels of multiple colors are simply and efficiently calculated by using the proportional relationship between the current and the resistance.

[0009] Optionally, calculating the compensation coefficients of the sub-pixels of multiple colors in the display area based on the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area includes: substituting the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area into the following formula S R =I R ′ / I R 、S G =I G ′ / I G and S B =I B ′ / I B , calculate and obtain the compensation coefficients of the sub-pixels of multiple colors in the display area, where I R , I B , I G Respectively represent the multiple first detection currents, I R ′、I B ′、I G ' respectively represent the target currents of the sub-pixels of multiple colors in the display area, S R 、S B 、S G The compensation coefficients of the sub-pixels of the multiple colors in the display area are respectively represented, so as to calculate the compensation coefficients of the sub-pixels of the multiple colors through the detection currents and target currents of the sub-pixels of the multiple colors.

[0010] Optionally, the compensation coefficient is a compensation coefficient at any grayscale. After the compensation coefficients of the sub-pixels of multiple colors in the display area are obtained by calculation, the method further includes: obtaining a compensation coefficient change curve of the sub-pixels of multiple colors in the display area at different grayscales according to the compensation coefficients of the sub-pixels of multiple colors in the display area at multiple grayscales, so as to perform brightness compensation on the sub-pixels of multiple colors in the display area respectively according to the compensation coefficient change curve of the sub-pixels of multiple colors in the display area at different grayscales, so as to comprehensively and efficiently realize brightness compensation of the sub-pixels at each grayscale according to the compensation coefficient change curve.

[0011] In a second aspect, the present invention discloses a computer device, comprising: a memory for storing at least one set of instructions; and a processor for executing the at least one set of instructions to perform the brightness compensation method for a display panel as described in any one of the above items.

[0012] In a third aspect, the present invention discloses a storage medium, wherein the storage medium stores at least one set of instructions, and the at least one set of instructions is used to enable a processor to execute the brightness compensation method for a display panel as described in any one of the above items.

[0013] In a fourth aspect, the present invention discloses a brightness compensation system for a display panel, wherein the display panel is electrically connected to a power management chip, and the power management chip is used to provide a power supply voltage to the display panel. The brightness compensation system includes a current detection device and a computer device as described above; the current detection device is used to detect the current output by the power management chip to the display panel.

[0014] The present invention discloses a brightness compensation method, system, computer device and storage medium for a display panel, which obtains multiple first detection currents and second detection currents in any display area, wherein the multiple first detection currents are the currents output to the display panel by a power management chip detected by a current detection device when sub-pixels of multiple colors in the display area are displayed individually, and the second detection current is the current output to the display panel by the power management chip detected by the current detection device when sub-pixels of multiple colors in the display area are displayed together. The target currents of the sub-pixels of multiple colors in the display area are calculated based on the multiple first detection currents, the second detection currents and the power supply voltage. The target currents are the currents flowing through the sub-pixels of multiple colors in the display area when the sub-pixels of multiple colors in the display area are displayed together. The compensation coefficients of the sub-pixels of multiple colors in the display area are calculated based on the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area, so as to perform brightness compensation on the sub-pixels of multiple colors in the display area according to the compensation coefficients of the sub-pixels of multiple colors in the display area, thereby reducing the color deviation problem of the display panel. Furthermore, since the plurality of first detection currents and the second detection currents are detected by a current detection device, the current detection device has lower cost and simpler structure than optical measurement equipment, and thus can quantitatively solve the color shift problem of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments of the present invention or the background technology will be described below.

[0016] Figure 1 A schematic structural diagram of a display panel disclosed in one embodiment of the present invention;

[0017] Figure 2A flowchart of a brightness compensation method for a display panel disclosed in one embodiment of the present invention;

[0018] Figures 3 to 6 This is an equivalent circuit diagram of sub-pixels of multiple colors within a display area disclosed in one embodiment of the present invention when displayed individually and together;

[0019] Figure 7 A compensation coefficient variation curve of a sub-pixel of a color at different grayscales disclosed in one embodiment of the present invention;

[0020] Figure 8 The figure is a schematic structural diagram of a brightness compensation system disclosed in one embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] Currently, OLED display panels are primarily driven by a display driver integrated circuit (DDIC) and a power management integrated circuit (PMIC). The PMIC is electrically connected to a power supply and is used to provide a first power voltage (ELVDD) and a second power voltage (ELVSS) to the display panel. The PMIC transmits the first and second power voltages (ELVDD and ELVSS) to the display panel via a flexible printed circuit board (FPCB) and the display driver chip, driving the organic light-emitting diodes (OLEDs) in each sub-pixel of the display panel to emit light.

[0023] After extensive research, the inventors discovered that because the flexible circuit board and display driver chip are both located on one side of the display panel, they need to transmit signals to the sub-pixels in each display area of ​​the display panel via wiring. However, wiring has resistance, so signals transmitted through wiring inevitably experience a reduction in voltage, or voltage drop. Furthermore, because the total resistance of sub-pixels of multiple colors within the same display area differs when displayed individually and collectively, the voltage drop of the power supply voltage received by the sub-pixels differs when displayed individually and collectively. This, in turn, results in different luminance levels for the sub-pixels when displayed individually and collectively, leading to color shift in the display panel and affecting the display quality.

[0024] Although the display panel can be photographed using optical measuring equipment to obtain the display brightness when displaying monochrome and white images, where the image of sub-pixels of multiple colors when displayed individually is a monochrome image, and the image of sub-pixels of multiple colors when displayed together is a white image, the actual current of the sub-pixels when displaying monochrome and white images is calculated based on the display brightness when displaying monochrome and white images, and the display brightness of the sub-pixels is compensated based on the compensation coefficient calculated based on the actual current and the target current to reduce the color deviation of the display panel, however, due to the high cost and complex structure of optical measuring equipment, it is difficult to quantitatively solve the color deviation problem of the display panel.

[0025] Based on this, the present invention discloses a brightness compensation scheme. When sub-pixels of multiple colors in any display area of ​​a display panel are displayed individually and together, a current detection device is used to respectively detect the current output by a power management chip to the display panel. The current flowing through the sub-pixels of multiple colors in the display area when the sub-pixels of multiple colors are displayed together is calculated based on the detected current and the power supply voltage. The compensation coefficient can be calculated based on the actual current when the sub-pixels of multiple colors in the display area are displayed individually, that is, the first detected current and the target current, and the brightness of the sub-pixel is compensated according to the compensation coefficient to solve the problem of color deviation of the display panel.

[0026] As an optional implementation of the present disclosure, an embodiment of the present disclosure discloses a brightness compensation method for a display panel, which is used to perform brightness compensation on the display panel and improve the color deviation of the display panel. Figure 1 As shown, Figure 1 This is a structural schematic diagram of a display panel disclosed in an embodiment of the present invention. The display panel 10 includes a display area AA and a non-display area NA. The display area AA includes at least one display area. The non-display area NA includes a binding area located on one side of the display panel 10. The binding area is provided with a display driver chip 11, and the display driver chip 11 is electrically connected to the flexible circuit board 12.

[0027] The flexible circuit board 12 can be electrically connected to the power management chip 13, and the power management chip 13 can be electrically connected to the power supply 14. The power supply 14 can provide power to the power management chip 13, causing the power management chip 13 to generate a power supply voltage. The power supply voltage is then transmitted to the display panel 10 via the flexible circuit board 12 and the display driver chip 11. The power supply voltage includes a first power supply voltage ELVDD and a second power supply voltage ELVSS. The power supply 14 can include a battery, etc. In other words, the power management chip 13 is primarily used to provide the first power supply voltage ELVDD and the second power supply voltage ELVSS to the display panel 10 to drive the light-emitting diodes in each sub-pixel of the display panel 10 to emit light, thereby driving each sub-pixel of the display panel 10 to display an image.

[0028] In an embodiment of the present invention, when performing pre-shipment display calibration on the display panel 10, a current detection device 15 can be connected in series between the power management chip 13 and the flexible circuit board 12. This current detection device 15 is used to detect the current output from the power management chip 13 to the display panel 10, calculate a compensation coefficient for the display panel 10 based on the detected current, and perform brightness compensation on the display panel 10 based on the compensation coefficient. The current detection device 15 can be an ammeter or a current sensor, for example. It is understood that after the current detection device 15 completes current detection, it can be removed from the display panel, and the power management chip 13 can be directly connected to the flexible circuit board 12 to ensure normal operation of the display panel 10.

[0029] In some embodiments of the present invention, the display area AA may include multiple display areas, and the multiple display areas may be composed of Figure 1 The dashed lines shown are divided. By controlling the multiple display areas to display separately, compensation coefficients for the multiple display areas can be calculated separately, thereby reducing the amount of single calculations required by the computer device involved in subsequent operation steps. Of course, the present invention is not limited to this. In other embodiments, the display area AA may include only one display area, which will not be further described here.

[0030] It can be understood that in the embodiment of the present invention, the calculation method of the compensation coefficient of different display areas of the display panel is the same. In the embodiment of the present invention, only one display area is used as an example to illustrate the calculation method of the compensation coefficient, and other display areas are not repeated.

[0031] like Figure 2 As shown, Figure 2 This is a flow chart of a brightness compensation method for a display panel disclosed in one embodiment of the present invention. The brightness compensation method includes:

[0032] S201: Obtain multiple first detection currents and second detection currents of any display area of ​​the display panel; wherein the multiple first detection currents are the currents output to the display panel 10 by the power management chip 13 detected by the current detection device 15 when sub-pixels of multiple colors in the display area are displayed separately, and the second detection currents are the currents output to the display panel 10 by the power management chip 13 detected by the current detection device 15 when sub-pixels of multiple colors in the display area are displayed together.

[0033] S202: Calculate target currents for sub-pixels of multiple colors in the display area based on multiple first detection currents, second detection currents, and a power supply voltage; wherein the target currents are currents flowing through the sub-pixels of multiple colors in the display area when the sub-pixels of multiple colors are displayed together.

[0034] S203 : Calculating compensation coefficients of the sub-pixels of multiple colors in the display area according to the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area.

[0035] Since the multiple first detection currents are the currents flowing through the sub-pixels of multiple colors in the display area when the sub-pixels of multiple colors are displayed individually, and the target currents of the sub-pixels of multiple colors are the currents flowing through the sub-pixels of multiple colors when the sub-pixels of multiple colors are displayed together, compensation coefficients of the sub-pixels of multiple colors in the display area are calculated based on the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area. After brightness compensation is performed on the sub-pixels of multiple colors in the display area based on the compensation coefficients of the sub-pixels of multiple colors in the display area, the current flowing through the sub-pixel of any color when the sub-pixel is displayed individually can be corrected to the current flowing through the sub-pixel of the color when the sub-pixels of multiple colors are displayed together, thereby reducing the difference in luminous brightness of the sub-pixels when displayed individually and when displayed together, thereby reducing the color deviation of the display panel and improving the display effect of the display panel.

[0036] Moreover, since the multiple first detection currents and the second detection currents are detected by the current detection device 15, rather than being calculated by measuring the display brightness of the display panel through an optical measuring device, and compared with the optical measuring device, the current detection device 15 has a lower cost and a simpler structure, and therefore, the color deviation problem of the display panel can be quantitatively solved.

[0037] In some embodiments of the present invention, calculating the target currents of sub-pixels of multiple colors in the display area based on multiple first detection currents, second detection currents and power supply voltages includes: calculating the equivalent resistance of sub-pixels of multiple colors in the display area based on multiple first detection currents, second detection currents and power supply voltages; calculating the target currents of sub-pixels of multiple colors in the display area based on the second detection current and the equivalent resistance of sub-pixels of multiple colors in the display area.

[0038] In some embodiments of the present invention, sub-pixels of multiple colors may include red sub-pixels, blue sub-pixels, and green sub-pixels. Of course, the present invention is not limited to this. In other embodiments, sub-pixels of multiple colors may also include red sub-pixels, blue sub-pixels, green sub-pixels, and white sub-pixels, which will not be repeated here.

[0039] Taking the example that the sub-pixels of multiple colors may include a red sub-pixel R, a blue sub-pixel B, and a green sub-pixel G, when the red sub-pixel R in the display area is displayed alone, the display screen of the display panel 10 is a red screen, and the equivalent circuit is as follows: Figure 3As shown, the current output from the power management chip 13 to the display panel 10 detected by the current detection device 15 is a first detection current I R When the green sub-pixel G in the display area is displayed alone, the display panel 10 displays a green screen. The equivalent circuit is as follows: Figure 4 As shown, the current detected by the current detection device 15 and outputted from the power management chip 13 to the display panel 10 is another first detection current I G When the blue sub-pixel B in the display area is displayed alone, the display panel 10 displays a blue screen. The equivalent circuit is as follows: Figure 5 As shown, the current detected by the current detection device 15 and outputted from the power management chip 13 to the display panel 10 is another first detection current I B When the sub-pixels R, G, and B of multiple colors in the display area are displayed together, the display panel 10 displays a white screen. The equivalent circuit is as follows: Figure 6 As shown, the current output from the power management chip 13 to the display panel 10 detected by the current detection device 15 is the second detection current I W .

[0040] Based on this, in some embodiments of the present invention, calculating the equivalent resistance of sub-pixels of multiple colors in the display area according to multiple first detection currents, second detection currents and power supply voltage includes: R , I B , I G , the second detection current I W and the power supply voltage U are substituted into the following formula U / (R L +R R )=I R 、U / (R L +R G )=I G 、U / (R L +R B )=I B 、U / (R L +R 并 )=I W and R 并 =R R *R G *R B / (R R *R G +R G *R B +R R *R B ), the equivalent resistance R of the sub-pixels R, G, and B of various colors in the display area can be calculated. R 、R G 、R B.

[0041] Because I R , I B , I G and U are known, so the equivalent resistance R can be solved according to the above formula R 、R G 、R B Among them, I R , I B , I G Respectively represent multiple first detection currents, I W represents the second detection current, the power supply voltage includes the first power supply voltage ELVDD and the second power supply voltage ELVSS, the voltage value U of the power supply voltage represents the difference between the first power supply voltage ELVDD and the second power supply voltage ELVSS, R R 、R G 、R B Respectively represent the equivalent resistance of the sub-pixels R, G, and B of various colors in the display area, R 并 Represents the parallel resistance of the sub-pixels R, G, and B of multiple colors in the display area, R L represents the equivalent resistance of the circuit between the power management chip 13 and the display panel 10 .

[0042] In some embodiments of the present invention, calculating the target current of the sub-pixels of multiple colors in the display area based on the second detection current and the equivalent resistance of the sub-pixels of multiple colors in the display area includes: calculating the parallel resistance of the sub-pixels of multiple colors in the display area based on the equivalent resistance of the sub-pixels of multiple colors in the display area; calculating the target current of the sub-pixels of multiple colors in the display area based on the proportional relationship between the second detection current, the parallel resistance and the equivalent resistance of the sub-pixels of multiple colors in the display area.

[0043] On the basis of the above embodiments, in some embodiments of the present invention, the equivalent resistance R of the sub-pixels R, G, and B of various colors in the display area is set to R 、R G 、R B Substitute into the following formula R 并 =R R *R G *R B / (R R *R G +R G *R B +R R *R B ), calculate the parallel resistance R of the sub-pixels R, G, and B of various colors in the display area 并 The second detection current I W , parallel resistance R 并The equivalent resistance R of the sub-pixels R, G, and B of various colors in the display area R 、R G 、R B Substitute into the following formula I R ′=I W *(R 并 / R R ), I G ′=I W *(R 并 / R G ) and I B ′=I W *(R 并 / R B ), calculate multiple target currents I of the sub-pixels R, G, and B of multiple colors in the display area R ′、I B ′、I G ′.

[0044] Of course, the present invention is not limited to this. In other embodiments, the parallel resistance R may not be calculated. 并 , but according to R 并 / R R =((U / I W )-R L ) / ((U / I R )-R L ), R 并 / R G =((U / I W )-R L ) / ((U / I G )-R L ), R 并 / R B =((U / I W )-R L ) / ((U / I B )-R L ) and the above formula to calculate multiple target currents I of the sub-pixels R, G, and B of multiple colors in the display area R ′、I B ′、I G ′, I will not elaborate on it here.

[0045] In some embodiments of the present invention, the compensation coefficients of the sub-pixels of multiple colors in the display area are calculated based on the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area, including: R , I B , I G and the target current I of the sub-pixels R, G, and B of various colors in the display area R′、I B ′、I G 'Substitute into the following formula S R =I R ′ / I R 、S G =I G ′ / I G and S B =I B ′ / I B , calculate the compensation coefficient S of the sub-pixels R, G, and B of various colors in the display area R 、S B 、S G .

[0046] Based on this, the compensation coefficients S of the sub-pixels R, G, and B of various colors in the display area can be R 、S B 、S G Writing into the display driver chip 11 can make the display driver chip 11 calculate the compensation coefficient S R 、S B 、S G The brightness of the multiple groups of color sub-pixels R, G, and B in the display area is compensated, and the current flowing through the sub-pixel R / G / B of any color in the display area when the sub-pixel R / G / B of that color is displayed alone is corrected to the current flowing through the sub-pixel R / G / B of that color when the sub-pixels R, G, and B of multiple colors in the display area are displayed together, so as to reduce the color deviation of any display area of ​​the display panel and improve the display effect of the display panel.

[0047] In some embodiments of the present invention, the calculated compensation coefficient is the compensation coefficient at any grayscale. Taking grayscale 255 as an example, the multiple first detection currents are the currents output to the display panel 10 by the power management chip 13 detected by the current detection device 15 when the sub-pixels of multiple colors in the display area individually display a 255-grayscale image, and the second detection currents are the currents output to the display panel 10 by the power management chip 13 detected by the current detection device 15 when the sub-pixels of multiple colors in the display area collectively display a 255-grayscale white image. Therefore, the calculated compensation coefficients are also the compensation coefficients when the display area displays a 255-grayscale image.

[0048] In some embodiments of the present invention, after calculating the compensation coefficients of the sub-pixels of multiple colors in the display area at any grayscale, it also includes: obtaining the compensation coefficient change curves of the sub-pixels of multiple colors in the display area at different grayscales based on the compensation coefficients of the sub-pixels of multiple colors in the display area at multiple grayscales, so as to perform brightness compensation on the sub-pixels of multiple colors in the display area respectively according to the compensation coefficient change curves of the sub-pixels of multiple colors in the display area at different grayscales.

[0049] It is understandable that if Figure 7 As shown, the compensation coefficient change curve of each color sub-pixel at different grayscales is a linear curve. Based on this, according to the compensation coefficient change curve of the sub-pixel of any color in the display area at different grayscales, the brightness compensation of the sub-pixel of this color in the display area at different grayscales can be performed.

[0050] As another optional implementation of the present disclosure, an embodiment of the present disclosure provides a computer device, which may be a chip or a server, etc., and includes:

[0051] a memory for storing at least one set of instructions;

[0052] The processor is configured to execute the at least one set of instructions to perform the brightness compensation method for the display panel provided in any one of the above embodiments.

[0053] As another optional implementation of the contents disclosed in the present invention, an embodiment of the present invention provides a storage medium, which includes a computer-readable storage medium, and the storage medium stores at least one set of instructions, which are used to enable a processor to execute the brightness compensation method of the display panel provided in any of the above embodiments.

[0054] The computer-readable storage media of the embodiments of the present invention include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be host-readable instructions, data structures, program modules or other data. Examples of host storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0055] As another optional implementation of the present disclosure, an embodiment of the present invention provides a brightness compensation system for a display panel, such as Figure 8 As shown, the display panel 10 is electrically connected to a power management chip 13, which is used to provide a power supply voltage to the display panel 10. The brightness compensation system 20 includes a current detection device 15 and a computer device 16, which is the computer device provided in the above embodiment. The current detection device 15 is used to detect the current output by the power management chip 13 to the display panel 10. Based on this brightness compensation system 20, the brightness compensation coefficient of the display panel can be calculated, and then the brightness of the display panel can be compensated based on the brightness compensation coefficient to reduce the color shift of the display panel.

[0056] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments merely represent several implementation methods of this specification. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of this specification, and these modifications and improvements fall within the scope of protection of this specification. Therefore, the scope of protection of the patent in this specification shall be subject to the appended claims.

Claims

1. A brightness compensation method for a display panel, characterized in that: The display panel is electrically connected to a power management chip, and the power management chip is used to provide a power supply voltage to the display panel. The brightness compensation method includes: Acquire multiple first detection currents and second detection currents of any display area of ​​the display panel, wherein the multiple first detection currents are currents output to the display panel by the power management chip detected by a current detection device when sub-pixels of multiple colors in the display area are displayed individually, and the second detection currents are currents output to the display panel by the power management chip detected by the current detection device when sub-pixels of multiple colors in the display area are displayed together; calculating, based on the plurality of first detection currents, the second detection current, and the power supply voltage, equivalent resistances of sub-pixels of multiple colors in the display area; and calculating, based on the second detection current and the equivalent resistances of the sub-pixels of multiple colors in the display area, target currents of the sub-pixels of multiple colors in the display area, the target currents being currents flowing through the sub-pixels of multiple colors in the display area when the sub-pixels of multiple colors are displayed together; Based on the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area, compensation coefficients of the sub-pixels of multiple colors in the display area are calculated, so as to perform brightness compensation on the sub-pixels of multiple colors in the display area respectively according to the compensation coefficients of the sub-pixels of multiple colors in the display area.

2. The brightness compensation method according to claim 1, wherein: The calculating, based on the plurality of first detection currents, the second detection current, and the power supply voltage, to obtain equivalent resistances of sub-pixels of multiple colors within the display area includes: Substitute the multiple first detection currents, the second detection current and the voltage value of the power supply voltage into the following formula U / (R L +R R )=I R 、U / (R L +R G )=I G 、U / (R L +R B )=I B 、U / (R L +R 并 )=I W and R 并 =R R *R G *R B / (R R *R G +R G *R B +R R *R B ), calculating and obtaining equivalent resistances of sub-pixels of multiple colors within the display area; Among them, I R , I B , I G Respectively represent the multiple first detection currents, I W represents the second detection current, U represents the voltage value of the power supply voltage, R R 、R G 、R B Respectively represent the equivalent resistance of the sub-pixels of multiple colors in the display area, R 并 represents the parallel resistance of the sub-pixels of multiple colors in the display area, R L Represents the equivalent resistance of the circuit between the power management chip and the display panel.

3. The brightness compensation method according to claim 1, wherein: The calculating target currents of the sub-pixels of multiple colors in the display area according to the second detection current and the equivalent resistances of the sub-pixels of multiple colors in the display area includes: calculating, based on equivalent resistances of the sub-pixels of multiple colors in the display area, parallel resistances of the sub-pixels of multiple colors in the display area; Target currents of the sub-pixels of multiple colors in the display area are calculated according to a proportional relationship among the second detection current, the parallel resistor, and the equivalent resistances of the sub-pixels of multiple colors in the display area.

4. The brightness compensation method according to claim 3, wherein: The calculating of the parallel resistance of the sub-pixels of multiple colors in the display area according to the equivalent resistance of the sub-pixels of multiple colors in the display area includes: substituting the equivalent resistance of the sub-pixels of multiple colors in the display area into the following formula R 并 =R R *R G *R B / (R R *R G +R G *R B +R R *R B ), calculate the parallel resistance of the sub-pixels of multiple colors in the display area, where R R 、R G 、R B Respectively represent the equivalent resistance of the sub-pixels of multiple colors in the display area, R 并 Represents the parallel resistance of sub-pixels of multiple colors in the display area; Calculating the target currents of the sub-pixels of multiple colors in the display area according to the proportional relationship among the second detection current, the parallel resistor, and the equivalent resistances of the sub-pixels of multiple colors in the display area includes: substituting the second detection current, the parallel resistor, and the equivalent resistances of the sub-pixels of multiple colors in the display area into the following formula: R ′=I W *(R 并 / R R ), I G ′=I W *(R 并 / R G ) and I B ′=I W *(R 并 / R B ), calculate and obtain multiple target currents of sub-pixels of multiple colors in the display area; wherein, I R , I B , I G Respectively represent the multiple first detection currents, I W Represents the second detection current, I R ′、I B ′、I G ' represents the target currents of the sub-pixels of multiple colors in the display area respectively.

5. The brightness compensation method according to claim 1, wherein: The step of calculating compensation coefficients of sub-pixels of multiple colors in the display area according to the multiple first detection currents and target currents of sub-pixels of multiple colors in the display area includes: Substitute the multiple first detection currents and the target currents of the sub-pixels of multiple colors in the display area into the following formula S R =I R ′ / I R 、S G =I G ′ / I G and S B =I B ′ / I B , calculate and obtain the compensation coefficients of the sub-pixels of multiple colors in the display area, where I R , I B , I G Respectively represent the multiple first detection currents, I R ′、I B ′、I G ' respectively represent the target currents of the sub-pixels of multiple colors in the display area, S R 、S B 、S G Respectively represent compensation coefficients of sub-pixels of multiple colors in the display area.

6. The brightness compensation method according to claim 1, wherein: The compensation coefficient is a compensation coefficient at any grayscale. After the compensation coefficients of the sub-pixels of multiple colors in the display area are obtained by calculation, the method further includes: Based on the compensation coefficients of the sub-pixels of multiple colors in the display area at multiple grayscales, a compensation coefficient change curve of the sub-pixels of multiple colors in the display area at different grayscales is obtained, so that brightness compensation is performed on the sub-pixels of multiple colors in the display area respectively according to the compensation coefficient change curve of the sub-pixels of multiple colors in the display area at different grayscales.

7. A computer device, characterized in that: include: a memory for storing at least one set of instructions; A processor, configured to execute the at least one set of instructions to perform the brightness compensation method for a display panel according to any one of claims 1 to 6.

8. A storage medium, characterized in that: The storage medium stores at least one set of instructions, and the at least one set of instructions is used to enable a processor to execute the brightness compensation method for a display panel according to any one of claims 1 to 6.

9. A brightness compensation system for a display panel, characterized in that: The display panel is electrically connected to a power management chip, which is used to provide a power supply voltage to the display panel. The brightness compensation system includes a current detection device and a computer device as described in claim 7; the current detection device is used to detect the current output by the power management chip to the display panel.

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