Backlight compensation method, display device, storage medium and program product

Abstract

The embodiment of the invention belongs to the display technology, and provides a backlight compensation method, a display device, a storage medium and a program product, and the method comprises the steps: obtaining each first compensation lamp bead of a fault lamp bead when it is determined that the fault occurs after a backlight LED lamp bead is lightened; on the basis of each first compensation lamp bead, brightness compensation is carried out on the fault lamp bead, and backlight compensation is completed; wherein the display frame where the first compensation lamp bead is located and the display frame where the fault lamp bead is located share one edge or one first corner point, and the first corner point is the corner point of the display frame where the fault lamp bead is located. When the Mini-LED lamp bead breaks down, the problem of how to carry out lighting effect compensation on the broken-down LED lamp bead so as to reduce negative effects caused by failure of the LED lamp bead can be solved.

Description

Technical Field

[0001] Embodiments of the present application relate to display technology. More specifically, it relates to a backlight compensation method, a display device, a storage medium, and a program product. Background Art

[0002] Mini LED (Light Emitting Diode) refers to an LED chip with a size in the order of 100 μm, whose size is between that of small-pitch LEDs and Micro LEDs, and is the result of further refinement of small-pitch LEDs. Among them, small-pitch LEDs refer to an LED backlight or display product with a pitch of adjacent lamp beads less than 2.5 mm. When used as a backlight, Mini LED mainly refers to the combination of Mini-LED and LCD (Liquid Crystal Display), so as to produce a display product of "Mini-LED backlight + LCD".

[0003] Compared with the LCD with traditional LED backlight, Mini-LED backlight has the characteristics of high color gamut, wide viewing angle, low power consumption, ultra-thin and energy-saving. However, when a Mini-LED lamp bead fails, the effect of zoned backlight will be greatly reduced, and sometimes it will cause important information to be displayed unclearly, which greatly affects the actual use effect. For example, when using an LCD with Mini-LED backlight in a vehicle to display driving information, information such as engine failure and coolant failure may be displayed unclearly, thus affecting driving safety.

[0004] Therefore, when a Mini-LED lamp bead fails, how to perform light effect compensation on the faulty LED lamp bead to reduce the negative impact brought by the failure of the LED lamp bead is still an urgent problem to be solved. Summary of the Invention

[0005] Embodiments of the present application provide a backlight compensation method, a display device, a storage medium, and a program product, which can solve the problem of how to perform light effect compensation on a faulty LED lamp bead to reduce the negative impact brought by the failure of the LED lamp bead when a Mini-LED lamp bead fails.

[0006] In a first aspect, embodiments of the present application provide a display device, which includes:

[0007] A display screen for performing display;

[0008] A processor connected to the display screen, and the processor is configured to: when it is determined that a backlight LED lamp bead fails after being lit, obtain each first compensation lamp bead of the faulty lamp bead;

[0009] Based on each of the first compensation lamp beads, perform brightness compensation on the faulty lamp bead to complete backlight compensation;

[0010] Wherein, the display frame where the first compensation lamp bead is located shares a side or a first corner point with the display frame where the faulty lamp bead is located, and the first corner point is a corner point of the display frame where the faulty lamp bead is located.

[0011] That is, after determining that there is a faulty lamp bead, obtain the position information and brightness value of the faulty lamp bead. Then, determine the first compensation lamp bead of the faulty lamp bead and the number of the first compensation lamp beads according to the position information of the faulty lamp bead. Calculate the compensation brightness value of the first compensation lamp bead for the faulty lamp bead, and perform brightness compensation on the faulty lamp bead according to the compensation brightness value of each first compensation lamp bead. Thus, the backlight compensation method provided in this embodiment can perform light effect compensation on the faulty lamp bead when the Mini-LED lamp bead fails, reducing the negative impact brought by the failure of the LED lamp bead.

[0012] In a second aspect, an embodiment of the present application provides a backlight compensation method, and the method includes:

[0013] When it is determined that a backlight LED lamp bead fails after being lit, obtain each first compensation lamp bead of the faulty lamp bead;

[0014] Based on each of the first compensation lamp beads, perform brightness compensation on the faulty lamp bead to complete backlight compensation;

[0015] Wherein, the display frame where the first compensation lamp bead is located shares a side or a first corner point with the display frame where the faulty lamp bead is located, and the first corner point is a corner point of the display frame where the faulty lamp bead is located.

[0016] That is, after determining that there is a faulty lamp bead, obtain the position information and brightness value of the faulty lamp bead. Then, determine the first compensation lamp bead of the faulty lamp bead and the number of the first compensation lamp beads according to the position information of the faulty lamp bead. Calculate the compensation brightness value of the first compensation lamp bead for the faulty lamp bead, and perform brightness compensation on the faulty lamp bead according to the compensation brightness value of each first compensation lamp bead. Thus, the backlight compensation method provided in this embodiment can perform light effect compensation on the faulty lamp bead when the Mini-LED lamp bead fails, reducing the negative impact brought by the failure of the LED lamp bead. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0018] Figure 1Schematic diagram of the application scenario of the backlight compensation method provided by this application;

[0019] Figure 2 Schematic diagram of the backlight display screen circuit provided by this application;

[0020] Figure 3 Schematic flow chart of the backlight compensation method provided by an embodiment of this application;

[0021] Figure 4 Schematic diagram of the LED lamp beads in the backlight compensation method provided by an embodiment of this application;

[0022] Figure 5 Schematic diagram of the LED lamp beads in the backlight compensation method provided by another embodiment of this application;

[0023] Figure 6 Schematic flow chart of the backlight compensation method provided by another embodiment of this application;

[0024] Figure 7 Schematic diagram of the LED lamp beads in the backlight compensation method provided by another embodiment of this application;

[0025] Figure 8 Schematic diagram of the display device provided by an embodiment of this application;

[0026] Figure 9 Schematic diagram of the display device provided by another embodiment of this application;

[0027] Figure 10 Schematic flow chart of the working process of the processor provided by an embodiment of this application;

[0028] Figure 11 Schematic diagram of the backlight compensation device provided by an embodiment of this application. Detailed implementation manners

[0029] To make the purpose, implementation manners, and advantages of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application in conjunction with the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all the embodiments.

[0030] It should be noted that the brief description of the terms in this application is only for the convenience of understanding the subsequent described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0031] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover but not be exclusive of inclusion. For example, a product or device that comprises a series of components need not be limited to those components clearly listed, but may include other components not clearly listed or inherent to such products or devices.

[0032] Embodiments of the present application relate to display technology, specifically, applied in the usage scenarios of display devices. Such display devices include, for example, televisions, smart TVs, laser projection devices, monitors, electronic bulletin boards, electronic tables, etc. The display device uses Mini LED (Light Emitting Diode) as a backlight for backlight display.

[0033] Specifically, Mini LED (Light Emitting Diode) refers to an LED chip with a size in the order of 100μm, with a size between small-pitch LEDs and Micro LEDs, which is the result of further refinement of small-pitch LEDs. Among them, small-pitch LEDs refer to LED backlights or display products with an adjacent lamp bead pitch of less than 2.5 millimeters. Using Mini LED as a backlight mainly means combining Mini-LED and LCD (Liquid Crystal Display) displays to produce a "Mini-LED backlight + LCD" display product. Compared with traditional LED-backlit LCDs, Mini-LED backlights have characteristics such as high color gamut, wide viewing angle, low power consumption, ultra-thin, and energy-saving. However, when a Mini-LED lamp bead fails, the effect of zoned backlight will be greatly reduced, sometimes resulting in unclear display of important information, which greatly affects the actual usage effect. For example, when using an LCD with a Mini-LED backlight to display driving information in a vehicle, information such as engine failure and coolant failure may be displayed unclearly, thus affecting driving safety.

[0034] Based on this, the present application provides a backlight compensation method, a display device, a storage medium, and a program product. The backlight compensation method includes: when it is determined that a backlight LED lamp bead fails after being lit, obtaining each first compensation lamp bead of the failed lamp bead; based on each of the first compensation lamp beads, performing brightness compensation on the failed lamp bead to complete backlight compensation; wherein, the display frame where the first compensation lamp bead is located shares a side or a first corner point with the display frame where the failed lamp bead is located, and the first corner point is a corner point of the display frame where the failed lamp bead is located.

[0035] That is, during the backlight display process of the display device, when the Mini-LED lamp bead fails, the brightness of the faulty lamp bead is compensated based on the non-faulty lamp beads directly adjacent or approximately adjacent to the faulty lamp bead to complete the backlight compensation of the display device, so as to reduce the negative impact caused by the failure of the LED lamp bead.

[0036] The backlight compensation method provided in the present application is applied to an electronic device, such as a processor of a display device. Figure 1 This is a schematic diagram of the application of the backlight compensation method provided in this application. In the figure, after receiving lamp bead fault information fed back by the LED driver chip, the electronic device determines that the backlight LED lamp bead is faulty after being illuminated. When it is determined that a fault has occurred after the backlight LED lamp bead is illuminated, each first compensation lamp bead of the faulty lamp bead is obtained; based on each first compensation lamp bead, brightness compensation is performed on the faulty lamp bead to complete backlight compensation; wherein, the display frame in which the first compensation lamp bead is located shares an edge or a first corner point with the display frame in which the faulty lamp bead is located, and the first corner point is a corner point of the display frame in which the faulty lamp bead is located.

[0037] See Figure 2 The backlight display circuit diagram shown.

[0038] The backlight display circuit mainly includes a power supply, a decoding chip, a local dimming chip, an MCU (Microcontroller Unit, referred to as the processor), a display, an LED driver chip (LED-Derive), a MOS tube, LED lamp beads, and a cache (Flash). The power supply provides power to the MCU, LED driver chip, LED lamp beads, and local dimming chip. There can be multiple LED driver chips, each of which is used to control the light emission of LED lamp beads in a certain area.

[0039] The decoding chip receives the video signal sent by the domain controller, decodes the video signal, and sends the decoded video signal to the Local Dimming chip.

[0040] Among them, the Local Dimming chip provides a partitioned backlight algorithm, sends the brightness value BL of each LED lamp bead after the partition backlight to the MCU through the SPI (Serial Peripheral interface, referred to as serial peripheral interface), and forwards the decoded video signal to the display.

[0041] Among them, the MCU is responsible for receiving the brightness value BL of each LED lamp bead sent by the Local Dimming chip through SPI, and controlling each LED lamp bead according to the brightness value BL of each LED lamp bead.

[0042] Among them, the LED driver chip is responsible for controlling the actual brightness of the LED lamp beads.

[0043] Among them, MOS controls the opening and closing between the LED lamp beads and the power supply.

[0044] The overall workflow of the backlight display circuit is as follows: the domain controller sends the video signal to the Mini-LED display's decoding chip for decoding. The decoded data (LVDS signal, RGB signal) is transmitted to the Local Dimming chip. Local Dimming extracts the grayscale value and the partitioned backlight conditions (including the distribution and number of LEDs) from the decoded data to calculate the backlight value BL for all LEDs at that moment and sends it to the MCU via SPI. After receiving the Local Dimming data packet, the MCU compensates and integrates the data to obtain the final brightness data, which it sends to the LED-Derive for brightness output.

[0045] The working logic of MCU includes:

[0046] The first step is initialization. This includes initializing the MCU clock, GPIO, SPI communication module, configuring the local dimming chip, configuring the LED driver chip, initializing the flash chip, and initializing brightness compensation.

[0047] The second step is to obtain the brightness value BL of all LED lamp beads i The brightness value BL of an LED lamp bead consists of three parts: BL provided by the Local Dimming chip ld , PWM overall brightness adjustment Duty, brightness compensation data BL bc Among them, BL ld It is a dynamic adjustment value given by the Local Dimming chip combined with the decoded video signal. Duty is the overall brightness value given by the domain controller, ranging from 0% to 100%. bc Is the brightness compensation value of the LED lamp bead, which is calculated by the MCU based on the compensation brightness value of each first compensation lamp bead as follows, BL bc Initialized to 0. The brightness value BL of an LED lamp bead i =(BL ldi +ΔBL bci )*Duty, where i=1, 2, 3..., n, n represents the total number of LEDs in the display. i Exceeding the limit value BL max When BL i =BL max .

[0048] Step 3: Send the brightness value BL of all the LED beads to the LED driving chip through SPI to light up all the LED beads, and read the fault information of all the LED beads through the LED driving chip. i

[0049] Step 4: Determine whether a fault occurs after the backlight LED beads are lit according to the fault information of the beads read by the LED driving chip. When it is determined that no fault occurs, adjust to Step 2 and continue to execute. When it is determined that a fault occurs, adjust to Step 5 and execute.

[0050] Step 5: Perform brightness compensation on the faulty beads to complete backlight compensation, and return to Step 2 to continue execution after the processing is completed.

[0051] The following details the backlight compensation method performed by the MCU.

[0052] Please refer to Figure 3 , an embodiment of the present application provides a backlight compensation method, including:

[0053] S310: When it is determined that a fault occurs after the backlight LED beads are lit, obtain each first compensation bead of the faulty bead, where the display frame where the first compensation bead is located shares a side or a first corner point with the display frame where the faulty bead is located, and the first corner point is a corner point of the display frame where the faulty bead is located.

[0054] The MCU determines whether there is a fault according to the LED bead fault information read by the LED driving chip. In an embodiment of the present application, when obtaining the bead fault information fed back by the LED driving chip, it is determined that a fault occurs after the backlight LED beads are lit. According to the bead fault information, the position information of the faulty bead can be obtained. According to the position information of the faulty bead, each first compensation bead of the faulty bead can be determined. The display frame where the first compensation bead is located shares a side or a first corner point with the display frame where the faulty bead is located, and the first corner point is a corner point of the display frame where the faulty bead is located. That is to say, when a fault occurs in the LED bead, the bead fault information fed back by the LED driving chip to the MCU at least carries the position information of the faulty bead. In an embodiment of the present application, the MCU can also read the position information of the faulty bead from a cache (such as Figure 2 the Flash shown)

[0055] In an embodiment of the present application, the MCU obtains the operation information of the LED lamp beads fed back by the LED driver chip every preset time period. When a fault occurs after the backlight LED lamp beads are lit, the operation information includes the lamp bead fault information. That is to say, when the operation information fed back by the LED driver chip contains the lamp bead fault information, it is determined that a fault occurs after the backlight LED lamp beads are lit.

[0056] After the backlight LED lamp beads are lit, the MCU continuously obtains the lamp bead fault information in a polling manner. Whether brightness compensation has been performed on the faulty lamp beads or not, the MCU will continuously monitor whether there are faulty lamp beads. In this way, as long as there are faulty lamp beads when the backlight LED lamp beads are lit, the MCU will perform backlight compensation, thereby reducing the negative impact brought by the LED lamp bead fault.

[0057] S320. Based on each of the first compensation lamp beads, perform brightness compensation on the faulty lamp beads to complete backlight compensation.

[0058] The MCU can also determine the number of the first compensation lamp beads of the faulty lamp bead according to the position information of the faulty lamp bead.

[0059] As Figure 4 shown, A represents the faulty lamp bead, and B represents the first compensation lamp bead. When A1 fails, the first compensation lamp beads are B11, B12, B13, B14, B15, B16, B17, and B18 shown in the figure in the first display area, and the number of the first compensation lamp beads is 8. When A2 fails, the first compensation lamp beads are B21, B22, and B23 shown in the figure in the first display area, and the number of the first compensation lamp beads is 3. When A3 fails, the first compensation lamp beads are B31, B32, B33, B34, B35, B36, B37, and B38 shown in the figure in the first display area, and the number of the first compensation lamp beads is 8. When A4 fails, the first compensation lamp beads are B41, B42, B43, B44, and B45 shown in the figure in the first display area, and the number of the first compensation lamp beads is 5. When A5 fails, the first compensation lamp beads are B51, B52, B53, B54, and B55 shown in the figure in the first display area, and the number of the first compensation lamp beads is 5.

[0060] As described above, the MCU can determine the number of the first compensation lamp beads of the faulty lamp bead according to the position information of the faulty lamp bead.

[0061] The fault information of the LED bead also carries the brightness value of the faulty LED bead. The MCU can also obtain the brightness value of each of the first compensation LED beads, and the brightness value of the first compensation LED bead refers to the original brightness value. It can be understood that when an LED bead fails, the brightness value of the LED bead will be less than the brightness value when the LED is not faulty, and the brightness of the LED can be compensated by increasing the brightness of the first compensation LED bead.

[0062] In one embodiment of the present application, according to the brightness value of the faulty LED bead, the number of the first compensation LED beads, the first compensation coefficient or the second compensation coefficient, the brightness threshold, and the brightness value of each of the first compensation LED beads, the compensation brightness value of each of the first compensation LED beads for the faulty LED bead is determined.

[0063] Specifically, when the brightness value of the first compensation LED bead is greater than the brightness threshold, the compensation brightness value of the first compensation LED bead is determined according to the brightness value of the faulty LED bead, the number of the first compensation LED beads, and the first compensation coefficient. When the brightness value of the first compensation LED bead is less than or equal to the brightness threshold, the compensation brightness value of the first compensation LED bead is determined according to the brightness value of the faulty LED bead, the number of the first compensation LED beads, and the second compensation coefficient. Based on the compensation brightness value of each of the first compensation LED beads, the brightness of the faulty LED bead is compensated.

[0064] The compensation brightness value refers to the compensated brightness value, which is the increased brightness value based on the original brightness value of the first compensation LED bead. That is to say, the compensation brightness value is the brightness increase value, which can be expressed as ΔBL Bji 。

[0065] For a first compensation LED bead, when the brightness value of the first compensation LED bead is slightly greater than the brightness threshold, the compensation brightness value of the first compensation LED bead for the faulty LED bead is determined according to the brightness value of the faulty LED bead, the number of the first compensation LED beads, and the first compensation coefficient. When the brightness value of the first compensation LED bead is less than or equal to the brightness threshold, the compensation brightness value of the first compensation LED bead for the faulty LED bead is determined according to the brightness value of the faulty LED bead, the number of the first compensation LED beads, and the second compensation coefficient.

[0066] That is, wherein, ΔBL Bji (i = 1, 2, 3…, K1) is the compensation brightness value, K1 is the number of the first compensation LED beads for the faulty LED bead Aj, ΔBL is the brightness threshold, η0 is the first compensation coefficient, η1 is the second compensation coefficient, and BL Aj represents the brightness value of the faulty LED bead Aj.

[0067] Wherein, the first compensation coefficient and the second compensation coefficient are determined according to the brightness value of the first compensation LED bead, the maximum brightness value, and the distance from the faulty LED bead. The first compensation coefficient is greater than the second compensation coefficient.

[0068] Specifically, in the formula, BL Bji represents the brightness value of the first compensation lamp bead, and BL max represents the maximum brightness value of the first compensation lamp bead, and l a represents the distance between the first compensation lamp bead and the faulty lamp bead.

[0069] Optionally, the first compensation coefficient and the second compensation coefficient can also vary according to the change of ambient light. For example, in a bright environment, both the first compensation coefficient and the second compensation coefficient increase, and in a dark environment, both the first compensation coefficient and the second compensation coefficient are adjusted downwards.

[0070] Please refer to Figure 4 , Figure 4 where A represents the faulty lamp bead and B represents the first compensation lamp bead.

[0071] For example Figure 4 as shown, when A1 fails, the brightness can be compensated by 8 such first compensation lamp beads. Assume that the set brightness value of A1 at this time is BL A1 , and according to the formula determine the compensation brightness value of each first compensation lamp bead of A1, where i = 1, 2, 3... K1, and K1 = 8. The finally obtained 8 compensation brightness values include the compensation brightness value ΔBL of the first compensation lamp bead B11 B11 , the compensation brightness value ΔBL of the first compensation lamp bead B12 B12 , the compensation brightness value ΔBL of the first compensation lamp bead B13 B13 , the compensation brightness value ΔBL of the first compensation lamp bead B14 B14 , the compensation brightness value ΔBL of the first compensation lamp bead B15 B15 , the compensation brightness value ΔBL of the first compensation lamp bead B16 B16 , the compensation brightness value ΔBL of the first compensation lamp bead B17 B17 , the compensation brightness value ΔBL of the first compensation lamp bead B18 B18 .

[0072] For example Figure 4 as shown, when A2 fails, the brightness can be compensated by 3 such first compensation lamp beads. Assume that the set brightness value of A2 at this time is BL A2 , and according to the formula determine the compensation brightness value of each first compensation lamp bead of A2, where i = 1, 2, 3, and K1 = 3. The finally obtained 3 compensation brightness values include the compensation brightness value ΔBL of the first compensation lamp bead B21 B21 , the compensation brightness value ΔBL of the first compensation lamp bead B22 B22, the compensation brightness value ΔBL of the first compensation lamp bead B23 B23 .

[0073] For example Figure 4 As shown, when there is a fault in A3, brightness compensation can be performed through 8 of these first compensation lamp beads. Assume that the brightness value set for A3 at this time is BL A3 , according to the formula Determine the compensation brightness value of each of these first compensation lamp beads for A3, where i = 1, 2, 3…, K1, and K1 = 8. The finally obtained 8 compensation brightness values include the compensation brightness value ΔBL of the first compensation lamp bead B31 B31 , the compensation brightness value ΔBL of the first compensation lamp bead B32 B32 , the compensation brightness value ΔBL of the first compensation lamp bead B33 B33 , the compensation brightness value ΔBL of the first compensation lamp bead B34 B34 , the compensation brightness value ΔBL of the first compensation lamp bead B35 B35 , the compensation brightness value ΔBL of the first compensation lamp bead B36 B36 , the compensation brightness value ΔBL of the first compensation lamp bead B37 B37 , the compensation brightness value ΔBL of the first compensation lamp bead B38 B38 .

[0074] For example Figure 4 As shown, when there is a fault in A4, brightness compensation can be performed through 5 of these first compensation lamp beads. Assume that the brightness value set for A4 at this time is BL A4 , according to the formula Determine the compensation brightness value of each of these first compensation lamp beads for A4, where i = 1, 2, 3…, K1, and K1 = 5. The finally obtained 5 compensation brightness values include the compensation brightness value ΔBL of the first compensation lamp bead B41 B41 , the compensation brightness value ΔBL of the first compensation lamp bead B42 B42 , the compensation brightness value ΔBL of the first compensation lamp bead B43 B43 , the compensation brightness value ΔBL of the first compensation lamp bead B44 B44 , the compensation brightness value ΔBL of the first compensation lamp bead B45 B45 .

[0075] For example Figure 4 As shown, when there is a fault in A5, brightness compensation can be performed through 5 of these first compensation lamp beads. Assume that the brightness value set for A5 at this time is BL A5 , according to the formula Determine the compensation brightness value of each of these first compensation lamp beads for A5, where i = 1, 2, 3…, K1, and K1 = 5. The finally obtained 5 compensation brightness values include the compensation brightness value ΔBL of the first compensation lamp bead B51B51 and the compensation brightness value ΔBL of the first compensation lamp bead B52 B52 and the compensation brightness value ΔBL of the first compensation lamp bead B53 B53 and the compensation brightness value ΔBL of the first compensation lamp bead B54 B54 and the compensation brightness value ΔBL of the first compensation lamp bead B55 B55 .

[0076] Performing brightness compensation on the faulty lamp bead according to the compensation brightness value of each of the first compensation lamp beads for the faulty lamp bead is to perform brightness compensation on the faulty lamp bead by increasing the brightness value of each of the first compensation lamp beads. Generally speaking, it is to make each of the first compensation lamp beads next to the faulty lamp bead brighter to achieve the purpose of brightness compensation. For example Figure 4 As shown in the faulty lamp bead A2, the way to perform brightness compensation on A2 is to make B21, B22, and B23 brighter. Specifically, given the original brightness value BL B21 and the compensation brightness value ΔBL B21 of B21, then the final brightness value BL of B21 = BL B21 + ΔBL B21 . Given the original brightness value BL B22 and the compensation brightness value ΔBL B22 of B22, then the final brightness value BL of B22 = BL B22 + ΔBL B22 . Given the original brightness value BL B23 and the compensation brightness value ΔBL B23 of B23, then the final brightness value BL of B23 = BL B23 + ΔBL B23 .

[0077] The MCU sends the final brightness value of each first compensation lamp bead to the LED driver chip for brightness output, controls each first compensation lamp bead to emit light, and completes backlight compensation.

[0078] What is described in the above steps S310 to S320 is the brightness compensation for one faulty lamp bead. If there are multiple faulty lamp beads, the backlight compensation method described in steps S310 to S320 can be executed for each faulty lamp bead to complete the brightness compensation for multiple faulty lamp beads. In one embodiment of the present application, brightness compensation for multiple faulty lamp beads can be performed simultaneously.

[0079] In one embodiment of the present application, when there are multiple adjacent faulty lamp beads, for one such faulty lamp bead, the first compensation lamp beads that are in the same column as the faulty lamp bead among the shared first compensation lamp beads between the faulty lamp bead and the adjacent faulty lamp beads are obtained as the first compensation lamp beads of the faulty lamp bead, and further, the second compensation lamp beads that are in the same column as the first compensation lamp beads are obtained as the second compensation lamp beads of the first compensation lamp beads.

[0080] Please refer to Figure 5 , the faulty lamp bead A2 and the faulty lamp bead A4 are adjacent. The first compensation lamp beads of the faulty lamp bead A2 are B21, B22, B28, B29, and B30, among which, B22 and B28 are in the same column as the faulty lamp bead A2. The first compensation lamp beads of the faulty lamp bead A4 are B23, B24, B25, B26, and B27, among which, B23 and B27 are in the same column as the faulty lamp bead A4.

[0081] In summary, this embodiment provides a backlight compensation method, including: when it is determined that a backlight LED lamp bead fails after being lit, obtaining each first compensation lamp bead of the faulty lamp bead; based on each first compensation lamp bead, performing brightness compensation on the faulty lamp bead to complete backlight compensation; wherein, the display frame where the first compensation lamp bead is located shares a side or a first corner point with the display frame where the faulty lamp bead is located, and the first corner point is a corner point of the display frame where the faulty lamp bead is located.

[0082] After determining that there is a faulty lamp bead, obtain the position information and brightness value of the faulty lamp bead. Then, determine the first compensation lamp beads of the faulty lamp bead and the number of the first compensation lamp beads according to the position information of the faulty lamp bead. Calculate the compensation brightness value of the first compensation lamp beads for the faulty lamp bead, and perform brightness compensation on the faulty lamp bead according to the compensation brightness value of each first compensation lamp bead. Thus, the backlight compensation method provided by this embodiment can perform light effect compensation on the faulty lamp bead when the Mini-LED lamp bead fails, reducing the negative impact brought by the failure of the LED lamp bead.

[0083] Please refer to Figure 6 , another embodiment of the present application further provides a backlight compensation method, which further describes how to perform light effect adjustment to improve the backlight display effect on the basis of the backlight compensation method provided in the above embodiment. It can be understood that after controlling the first compensation lamp beads to be brighter, although the brightness compensation of the faulty lamp bead will be completed, the increase in the brightness of the first compensation lamp beads will also affect the brightness of some non-faulty lamp beads. Therefore, for these affected non-faulty lamp beads, brightness weakening processing needs to be performed to adjust the uniformity of the backlight display and improve the backlight display effect.

[0084] Specifically, the backlight compensation method provided by this embodiment includes:

[0085] S610. When it is determined that a fault occurs after the backlight LED beads are lit, based on each of the first compensation beads, perform brightness compensation on the faulty bead to complete backlight compensation.

[0086] This step can refer to the relevant descriptions of steps S310 to S320 in the above embodiments, which will not be elaborated here.

[0087] S620. When the display frame where the first compensation bead is located shares a first corner point with the display frame where the faulty bead is located, determine the compensation brightness value of each second compensation bead of the first compensation bead according to the compensation brightness value of the first compensation bead and the third compensation coefficient; when the display frame where the first compensation bead is located shares a side with the display frame where the faulty bead is located, determine the compensation brightness value of each second compensation bead of the first compensation bead according to the compensation brightness value of the first compensation bead and the fourth compensation coefficient.

[0088] The third compensation coefficient and the fourth compensation coefficient are determined according to the brightness value of the first compensation bead, the maximum brightness value, and the distance from the faulty bead; the third compensation coefficient is greater than the fourth compensation coefficient.

[0089] Specifically, In the formula, η3 represents the third compensation coefficient, η4 represents the fourth compensation coefficient, BL Bji represents the brightness value of the first compensation bead, BL max represents the maximum brightness value of the first compensation bead, l a represents the distance between the first compensation bead and the faulty bead.

[0090] Optionally, the third compensation coefficient and the fourth compensation coefficient can also vary according to the change of ambient light. For example, in a bright environment, both the third compensation coefficient and the fourth compensation coefficient are adjusted smaller, and in a dark environment, both the third compensation coefficient and the fourth compensation coefficient are increased.

[0091] The display frame where the second compensation bead is located shares a side or a second corner point with the display frame where the first compensation bead is located, and the second corner point is a corner point of the first display area. It can be understood that the first compensation bead can have one or more second compensation beads, or no second compensation bead.

[0092] Please refer to Figure 7, the faulty lamp bead A1 has 8 first compensation lamp beads, namely B11, B12, B13, B14, B15, B16, B17, and B18. The first compensation lamp bead B11 has 3 second compensation lamp beads, namely C111, C112, and C113. The second compensation lamp bead of the first compensation lamp bead B12 is C121. The second compensation lamp beads of the first compensation lamp bead B13 are C131, C132, and C133 respectively. The second compensation lamp bead of the first compensation lamp bead B14 is C141. The second compensation lamp beads of the first compensation lamp bead B15 are C151, C152, and C153 respectively. The second compensation lamp bead of the first compensation lamp bead B16 is C161. The second compensation lamp beads of the first compensation lamp bead B17 are C171, C172, and C173. The second compensation lamp bead of the first compensation lamp bead B18 is C181.

[0093] Please refer to Figure 7 , the faulty lamp bead A2 has 3 first compensation lamp beads, namely B21, B22, and B23. The first compensation lamp bead B21 has 3 second compensation lamp beads, namely C211, C212, and C213. The second compensation lamp bead of the first compensation lamp bead B22 is C221. The second compensation lamp bead of the first compensation lamp bead B23 is C231.

[0094] Please refer to Figure 7 , the faulty lamp bead A3 has 8 first compensation lamp beads, namely B31, B32, B33, B34, B35, B36, B37, and B38. The first compensation lamp bead B31 has 3 second compensation lamp beads, namely C311, C312, and C313. The second compensation lamp bead of the first compensation lamp bead B32 is C321. The second compensation lamp beads of the first compensation lamp bead B33 are C331, C332, and C333 respectively. The second compensation lamp bead of the first compensation lamp bead B34 is C341. The second compensation lamp bead of the first compensation lamp bead B35 is C351. The second compensation lamp bead of the first compensation lamp bead B37 is C371. The second compensation lamp bead of the first compensation lamp bead B38 is C381.

[0095] Please refer to Figure 7 , the faulty lamp bead A4 has 5 first compensation lamp beads, namely B41, B42, B43, B44, and B45. The first compensation lamp bead B41 has 3 second compensation lamp beads, namely C411, C412, and C413. The second compensation lamp bead of the first compensation lamp bead B42 is C421. The second compensation lamp beads of the first compensation lamp bead B43 are C431, C432, and C433 respectively. The second compensation lamp bead of the first compensation lamp bead B44 is C441. The second compensation lamp bead of the first compensation lamp bead B45 is C451.

[0096] Please refer to Figure 7, the faulty lamp bead A5 has 5 first compensation lamp beads, namely B51, B52, B53, B54, and B55. The first compensation lamp bead B51 has 1 second compensation lamp bead, which is C511. The second compensation lamp bead of the first compensation lamp bead B53 is C531. The second compensation lamp beads of the first compensation lamp bead B54 are C541, C542, and C543 respectively. The second compensation lamp bead of the first compensation lamp bead B55 is C551.

[0097] When the display frame where the first compensation lamp bead is located shares a first corner point with the display frame where the faulty lamp bead is located, the first compensation lamp bead is in a diagonal position. For the first compensation lamp bead in the diagonal position, determine the compensation brightness value of the second compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the third compensation coefficient. Assume that the compensation brightness value of the first compensation lamp bead is ΔBL Cjix , then where, ΔBL Bji represents the compensation brightness value of the first compensation lamp bead Bji in the diagonal position, and η3 represents the third compensation coefficient. Bji are the first compensation lamp beads at the four diagonal positions. For example Figure 6 shown as B11, at this time, the second compensation lamp beads of B11 are C111 (when x = 1), C112 (when x = 2), and C113 (when x = 3).

[0098] Please continue to refer to Figure 7 , for the faulty lamp bead A1, in the formula , i = 1, 3, 5, 7. For the faulty lamp bead A2, in the formula , i = 1. For the faulty lamp bead A3, in the formula , i = 1, 3. For the faulty lamp bead A4, in the formula , i = 1, 3. For the faulty lamp bead A5, in the formula , i = 4.

[0099] When the display frame where the first compensation lamp bead is located shares a side with the display frame where the faulty lamp bead is located, the first compensation lamp bead is in a non - diagonal position. For the first compensation lamp bead in the non - diagonal position, determine the compensation brightness value of the second compensation lamp bead according to the brightness value of the first compensation lamp bead and the fourth compensation coefficient. Assume that the compensation brightness value of the first compensation lamp bead is ΔBL Cjix , then ΔBL Cjix =-ΔBL Bji η4, where, ΔBL Bji represents the compensation brightness value of the first compensation lamp bead Bji in the non - diagonal position, and η4 represents the fourth compensation coefficient. Bji are the first compensation lamp beads in the non - diagonal position. For example Figure 5 shown as B12, at this time, the second compensation lamp bead of B11 is C121 (when x = 1).

[0100] Please continue to refer to Figure 7 , for the faulty lamp bead A1, the formula ΔBL Cjix =-ΔBL Bji where i = 2, 4, 6, 8 in η4. For the faulty lamp bead A2, the formula ΔBL Cjix =-ΔBL Bji where i = 2, 3 in η4. For the faulty lamp bead A3, the formula ΔBL Cjix =-ΔBL Bji where i = 2, 4, 5, 7, 8 in η4. For the faulty lamp bead A4, the formula ΔBL Cjix =-ΔBL Bji where i = 2, 4, 5 in η4. For the faulty lamp bead A5, the formula ΔBL Cjix =-ΔBL Bji where i = 1, 2, 3, 5 in η4.

[0101] S630. According to the compensation brightness value of each of the second compensation lamp beads, perform brightness compensation on each of the second compensation lamp beads to complete the brightness weakening process of each of the second compensation lamp beads.

[0102] For any one of the second compensation lamp beads, after determining the compensation brightness value of the second compensation lamp bead, according to the original brightness value of the second compensation lamp bead and the compensation brightness value of the second compensation lamp bead, determine the brightness value of the second compensation lamp bead after the brightness weakening process. Send the brightness value of the second compensation lamp bead after the brightness weakening process to the LED driver chip to adjust the brightness value of the second compensation lamp bead.

[0103] In one embodiment, when there are multiple first compensation lamp beads corresponding to the second compensation lamp bead and there are multiple compensation brightness values, obtain the minimum compensation brightness value among the multiple compensation brightness values as the compensation brightness value of the second compensation lamp bead.

[0104] Please refer to Figure 5 , the second compensation lamp beads of the faulty lamp bead A1 and the faulty lamp bead A3 overlap, resulting in some of the second compensation lamp beads corresponding to multiple first compensation lamp beads. For example, C172 corresponds to B17 and B31, C171 corresponds to B17 and B31, C161 corresponds to B16 and B32, C153 corresponds to B15 and B33, and C152 corresponds to B15 and B33.

[0105] Then, for example, C172 corresponds to B17 and has a first compensation brightness value, and corresponds to B31 and has a second compensation brightness value. C172 has two compensation brightness values. At this time, the compensation brightness value of C172 is the minimum compensation brightness value among the first compensation brightness value and the second compensation brightness value. Assume that the first compensation brightness value is less than the second compensation brightness value, then the compensation brightness value of C172 is the first compensation brightness value. That is to say, instead of performing two brightness weakening processes on C172, only one brightness weakening process is performed.

[0106] Similarly, optionally, if one of the first compensation lamp beads corresponds to multiple of the faulty lamp beads and has multiple compensation brightness values, the maximum compensation brightness value among the multiple compensation brightness values is obtained as the compensation brightness value of the first compensation lamp bead. That is, instead of performing two brightness compensations on the first compensation lamp bead, only one brightness compensation is performed.

[0107] In summary, this embodiment provides a backlight compensation method, including: when it is determined that a backlight LED lamp bead fails after being lit, the faulty lamp bead is compensated in brightness according to the compensation brightness value of each first compensation lamp bead for the faulty lamp bead. The compensation brightness value of the second compensation lamp bead is determined according to the compensation brightness value of the first compensation lamp bead, the third compensation coefficient, or the fourth compensation coefficient. Each second compensation lamp bead is compensated in brightness according to the compensation brightness value of each second compensation lamp bead, and the brightness weakening process of each second compensation lamp bead is completed.

[0108] After it is determined that there are faulty lamp beads, the position information and brightness value of the faulty lamp beads are obtained. Then, according to the position information of the faulty lamp beads, the first compensation lamp bead and the number of the first compensation lamp beads of the faulty lamp beads are determined. The compensation brightness value of the first compensation lamp bead for the faulty lamp bead is calculated, and the faulty lamp bead is compensated in brightness according to the compensation brightness value of each first compensation lamp bead. Thus, the backlight compensation method provided by this embodiment can perform light effect compensation on the faulty lamp beads when the Mini-LED lamp beads fail, reducing the negative impact brought by the failure of the LED lamp beads.

[0109] In addition, after the first compensation lamp bead is made brighter, the increase in the brightness of the first compensation lamp bead will also affect the brightness of some non-faulty lamp beads. Therefore, the method provided by this embodiment performs a brightness weakening process on these affected non-faulty lamp beads to adjust the uniformity of the backlight display and improve the backlight display effect.

[0110] Please refer to Figure 8 , an embodiment of the present application further provides a display device 10, including a display screen 100 and a processor 200 connected to the display screen 100. The processor 200 is the MCU.

[0111] In an embodiment of the present application, both the display screen 100 and the processor 100 are disposed in the backlight display screen circuit 300, and the display device 10 further includes the backlight display screen circuit 300.

[0112] Please refer to Figure 9 the schematic diagram of the backlight display screen circuit 300 shown in the figure.

[0113] The backlight display screen circuit 300 mainly includes a power supply 310, a decoding chip 320, a Local Dimming chip 330, a display screen 100, the processor (MCU) 200, an LED driving chip (LED-Derive) 340, a MOS transistor 350, LED lamp beads 360, and a cache (Flash) 370. Among them, the power supply 310 supplies power to the processor 200, the LED driving chip 340, the LED lamp beads 360, and the Local Dimming chip 330. The number of LED driving chips 340 can be multiple, and each LED driving chip 340 is used to control the light emission of LED lamp beads in one area. When multiple faulty lamp beads in different areas need to perform brightness compensation, the corresponding multiple LED driving chips 340 can be controlled simultaneously for brightness compensation, or can be controlled successively for brightness compensation, which is not limited in this embodiment.

[0114] Among them, the decoding chip 320 receives the video signal sent by the domain controller and decodes the video signal, and sends the decoded video signal to the Local Dimming chip 330.

[0115] Among them, the Local Dimming chip 330 provides a zoned backlight algorithm, sends the brightness value BL of each LED lamp bead 360 after zoned backlight to the processor 200 through SPI (Serial Peripheral Interface), and forwards the decoded video signal to the display screen 100.

[0116] Among them, the processor 200 is responsible for receiving the brightness value BL of each LED lamp bead 360 sent by the Local Dimming chip 330 through SPI, and controls each LED lamp bead 360 according to the brightness value BL of each LED lamp bead 360.

[0117] Among them, the LED driving chip 340 is responsible for controlling the actual brightness of the LED lamp beads 360.

[0118] Among them, the MOS transistor 350 controls the on and off between the LED lamp beads 360 and the power supply 310.

[0119] The overall working process of the backlight display circuit 300 is as follows: The domain controller sends video signals to the decoding chip 320 of the Mini-LED display 100 for decoding. The decoded data (LVDS signals, RGB signals) are sent to the Local Dimming chip 330. The Local Dimming extracts the gray values and the situation of the zoned backlight (including the distribution and quantity of the lamp beads) from the decoded data, calculates the backlight value BL of all the LED lamp beads 360 at this moment, and sends it to the processor 200 through SPI. After receiving the Local Dimming data packet, the processor 200 compensates and integrates the data to obtain the final brightness data, and sends the final brightness data to the LED-Derive for brightness output.

[0120] Please refer to Figure 10 , and the working logic of the processor 200 includes:

[0121] The first step is initialization. Initialization includes the initialization of the clock of the processor 200, GPIO initialization, SPI communication module initialization, configuration of the Local Dimming chip 330, configuration of the LED driver chip 340, Flash chip initialization, brightness compensation initialization, etc.

[0122] The second step is to obtain the brightness value BL of all the LED lamp beads 360 i . The brightness value BL of an LED lamp bead 360 consists of three parts: BL provided by the Local Dimming chip 330 ld , the overall PWM brightness adjustment Duty, and the brightness compensation data BL bc . Among them, BL ld is a dynamically adjusted value given by the Local Dimming chip 330 in combination with the decoded video signal. Among them, Duty is the overall brightness value given by the domain controller, and the range is 0% to 100%. BL bc is the brightness compensation value of the LED lamp bead 360, which is calculated and given by the processor 200 according to the compensation brightness values of each first compensated lamp bead described below, and BL bc is initialized to 0. The brightness value BL of an LED lamp bead 360 i = (BL ldi + ΔBL bci ) * Duty, where i = 1, 2, 3..., n, and n represents the total number of LEDs in the display 100. Among them, when BL i exceeds the limit value BL max , BL i = BL max .

[0123] The third step is to use the brightness value BL of all the LED lamp beads 360i It is sent to the LED driving chip 340 through SPI to light up all the LED beads 360, and the fault information of all the LED beads is read through the LED driving chip 340.

[0124] Step 4: Determine whether a fault occurs after the backlight LED beads 360 are lit according to the fault information of the beads read by the LED driving chip 340. When it is determined that no fault occurs, adjust to Step 2 and continue to execute. When it is determined that a fault occurs, adjust to Step 5 and execute.

[0125] Step 5: Perform brightness compensation on the faulty beads to complete backlight compensation, and return to Step 2 to continue execution after the processing is completed.

[0126] Specifically, when performing backlight compensation, the processor 200 is configured to: when it is determined that a fault occurs after the backlight LED beads are lit, obtain each first compensation bead of the faulty bead; based on each of the first compensation beads, perform brightness compensation on the faulty bead to complete backlight compensation; wherein, the display frame where the first compensation bead is located shares a side or a first corner point with the display frame where the faulty bead is located, and the first corner point is a corner point of the display frame where the faulty bead is located.

[0127] The processor 200 is configured to: when obtaining the bead fault information fed back by the LED driving chip, determine that a fault occurs after the backlight LED beads are lit; obtain the position information of the faulty bead according to the bead fault information; and determine each first compensation bead of the faulty bead according to the position information of the faulty bead.

[0128] The bead fault information also carries the brightness value of the faulty bead. The processor 200 is configured to: obtain the brightness value of the faulty bead, the number of the first compensation beads, and the brightness value of each of the first compensation beads; when the brightness value of the first compensation bead is greater than the brightness threshold, determine the compensation brightness value of the first compensation bead according to the brightness value of the faulty bead, the number of the first compensation beads, and the first compensation coefficient; when the brightness value of the first compensation bead is less than or equal to the brightness threshold, determine the compensation brightness value of the first compensation bead according to the brightness value of the faulty bead, the number of the first compensation beads, and the second compensation coefficient; perform brightness compensation on the faulty bead based on the compensation brightness value of each of the first compensation beads; wherein, the first compensation coefficient and the second compensation coefficient are determined according to the brightness value of the first compensation bead, the maximum brightness value, and the distance from the faulty bead; and the first compensation coefficient is greater than the second compensation coefficient.

[0129] The processor 200 is configured to: when the display frame where the first compensation lamp bead is located shares a first corner point with the display frame where the faulty lamp bead is located, determine the compensation brightness value of each second compensation lamp bead of the first compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the third compensation coefficient; when the display frame where the first compensation lamp bead is located shares a side with the display frame where the faulty lamp bead is located, determine the compensation brightness value of each second compensation lamp bead of the first compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the fourth compensation coefficient; perform brightness compensation on each second compensation lamp bead according to the compensation brightness value of each second compensation lamp bead to complete the brightness weakening process of each second compensation lamp bead; wherein, the display frame where the second compensation lamp bead is located shares a side or a second corner point with the display frame where the first compensation lamp bead is located, and the second corner point is a corner point of the first display area; wherein, the third compensation coefficient and the fourth compensation coefficient are determined according to the brightness value of the first compensation lamp bead, the maximum brightness value, and the distance from the faulty lamp bead; and the third compensation coefficient is greater than the fourth compensation coefficient.

[0130] The processor 200 is configured to: when there are multiple first compensation lamp beads corresponding to the second compensation lamp bead and there are multiple compensation brightness values, obtain the minimum compensation brightness value among the multiple compensation brightness values as the compensation brightness value of the second compensation lamp bead.

[0131] The processor 200 is configured to: when there are multiple adjacent faulty lamp beads, for one faulty lamp bead, obtain the first compensation lamp bead in the same column as the faulty lamp bead among the shared first compensation lamp beads between the adjacent faulty lamp beads as the first compensation lamp bead of the faulty lamp bead, and obtain the second compensation lamp bead in the same column as the first compensation lamp bead as the second compensation lamp bead of the first compensation lamp bead.

[0132] The processor 200 is configured to: obtain the operation information of the LED lamp beads fed back by the LED driving chip every preset time period; wherein, when a backlight LED lamp bead fails after being lit, the operation information includes the lamp bead failure information.

[0133] Figure 11 It is a schematic structural diagram of a backlight compensation device 20 provided by this application. As Figure 11 shown, the device 20 includes:

[0134] An acquisition module 21, configured to acquire each first compensation lamp bead of the faulty lamp bead when it is determined that a backlight LED lamp bead fails after being lit.

[0135] A brightness compensation module 22, configured to perform brightness compensation on the faulty lamp bead based on each first compensation lamp bead to complete backlight compensation.

[0136] In one embodiment of the present application, the obtaining module 21 is specifically configured to: when obtaining the bead fault information fed back by the LED driving chip, determine that a fault occurs after the backlight LED bead is lit; obtain the position information of the faulty bead according to the bead fault information; and determine each first compensation bead of the faulty bead according to the position information of the faulty bead.

[0137] In one embodiment of the present application, the bead fault information also carries the brightness value of the faulty bead. The brightness compensation module 22 is specifically configured to: obtain the brightness value of the faulty bead, the number of the first compensation beads, and the brightness value of each of the first compensation beads; when the brightness value of the first compensation bead is greater than the brightness threshold, determine the compensation brightness value of the first compensation bead according to the brightness value of the faulty bead, the number of the first compensation beads, and the first compensation coefficient; when the brightness value of the first compensation bead is less than or equal to the brightness threshold, determine the compensation brightness value of the first compensation bead according to the brightness value of the faulty bead, the number of the first compensation beads, and the second compensation coefficient; and perform brightness compensation on the faulty bead based on the compensation brightness value of each of the first compensation beads.

[0138] In one embodiment of the present application, the brightness compensation module 22 is further configured to: when the display frame where the first compensation bead is located shares a first corner point with the display frame where the faulty bead is located, determine the compensation brightness value of each second compensation bead of the first compensation bead according to the compensation brightness value of the first compensation bead and the third compensation coefficient; when the display frame where the first compensation bead is located shares a side with the display frame where the faulty bead is located, determine the compensation brightness value of each second compensation bead of the first compensation bead according to the compensation brightness value of the first compensation bead and the fourth compensation coefficient; perform brightness compensation on each second compensation bead according to the compensation brightness value of each second compensation bead, and complete the brightness weakening process of each second compensation bead; wherein, the display frame where the second compensation bead is located shares a side or a second corner point with the display frame where the first compensation bead is located, and the second corner point is a corner point of the first display area.

[0139] In one embodiment of the present application, the obtaining module 11 is further configured to obtain the operation information of the LED beads fed back by the LED driving chip every preset time period; wherein, when a fault occurs after the backlight LED bead is lit, the operation information includes the bead fault information.

[0140] The backlight compensation device 20 provided by the embodiment of the present application can execute the backlight compensation method in the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here. It should be noted that the above Figure 11 The division of the above-mentioned modules is only for illustration, and the present application does not limit the division of each module and the naming of each module.

[0141] The present application also provides a computer-readable storage medium, which may include: various media capable of storing program codes such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs. Specifically, program instructions are stored in the computer-readable storage medium, and the program instructions are used for the method in the above embodiments.

[0142] The present application also provides a computer program product, which includes execution instructions stored in a readable storage medium. At least one control module of the display device can read the execution instructions from the readable storage medium, and the at least one control module executes the execution instructions to enable the display device to implement the backlight compensation method provided by the above various embodiments.

[0143] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application.

[0144] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for better explaining the principles and actual applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that, The display device includes: a display screen for display; a processor connected to the display screen, the processor being configured to: when it is determined that a fault occurs after the backlight LED lamp beads are lit, obtain each first compensation lamp bead of the faulty lamp bead; perform brightness compensation on the faulty lamp bead based on each of the first compensation lamp beads to complete backlight compensation; wherein, the display frame where the first compensation lamp bead is located shares a side or a first corner point with the display frame where the faulty lamp bead is located, and the first corner point is a corner point of the display frame where the faulty lamp bead is located.

2. The display device according to claim 1, wherein The processor is configured to: when obtaining the lamp bead fault information fed back by the LED driver chip, determine that a fault occurs after the backlight LED lamp beads are lit; obtain the position information of the faulty lamp bead according to the lamp bead fault information; determine each first compensation lamp bead of the faulty lamp bead according to the position information of the faulty lamp bead.

3. The display device according to claim 2, wherein The lamp bead fault information also carries the brightness value of the faulty lamp bead, and the processor is configured to: obtain the brightness value of the faulty lamp bead, the number of the first compensation lamp beads, and the brightness value of each of the first compensation lamp beads; when the brightness value of the first compensation lamp bead is greater than the brightness threshold, determine the compensation brightness value of the first compensation lamp bead according to the brightness value of the faulty lamp bead, the number of the first compensation lamp beads, and the first compensation coefficient; when the brightness value of the first compensation lamp bead is less than or equal to the brightness threshold, determine the compensation brightness value of the first compensation lamp bead according to the brightness value of the faulty lamp bead, the number of the first compensation lamp beads, and the second compensation coefficient; perform brightness compensation on the faulty lamp bead based on the compensation brightness value of each of the first compensation lamp beads; wherein, the first compensation coefficient and the second compensation coefficient are determined according to the brightness value of the first compensation lamp bead, the maximum brightness value, and the distance from the faulty lamp bead; the first compensation coefficient is greater than the second compensation coefficient.

4. The display device according to claim 3, wherein The processor is configured to: when the display frame where the first compensation lamp bead is located shares a first corner point with the display frame where the faulty lamp bead is located, determine the compensation brightness value of each second compensation lamp bead of the first compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the third compensation coefficient; when the display frame where the first compensation lamp bead is located shares a side with the display frame where the faulty lamp bead is located, determine the compensation brightness value of each second compensation lamp bead of the first compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the fourth compensation coefficient; perform brightness compensation on each second compensation lamp bead according to the compensation brightness value of each second compensation lamp bead to complete the brightness weakening process of each second compensation lamp bead; wherein, the display frame where the second compensation lamp bead is located shares a side or a second corner point with the display frame where the first compensation lamp bead is located, and the second corner point is a corner point of the first display area.

5. A backlight compensation method, characterized in that, The method includes: when it is determined that a fault occurs after the backlight LED lamp beads are lit, obtain each first compensation lamp bead of the faulty lamp bead; perform brightness compensation on the faulty lamp bead based on each of the first compensation lamp beads to complete backlight compensation; Wherein, the display frame where the first compensation lamp bead is located shares a side or a first corner point with the display frame where the faulty lamp bead is located, and the first corner point is the corner point of the display frame where the faulty lamp bead is located.

6. The method according to claim 5, characterized in that When it is determined that a fault occurs after the backlight LED lamp bead is lit, obtaining each first compensation lamp bead of the faulty lamp bead includes: When obtaining the lamp bead fault information fed back by the LED driver chip, it is determined that a fault occurs after the backlight LED lamp bead is lit; Obtaining the position information of the faulty lamp bead according to the lamp bead fault information; Determining each first compensation lamp bead of the faulty lamp bead according to the position information of the faulty lamp bead.

7. The method according to claim 6, characterized in that, The lamp bead fault information also carries the brightness value of the faulty lamp bead. Based on each first compensation lamp bead, performing brightness compensation on the faulty lamp bead includes: Obtaining the brightness value of the faulty lamp bead, the number of first compensation lamp beads, and the brightness value of each first compensation lamp bead; When the brightness value of the first compensation lamp bead is greater than the brightness threshold, determining the compensation brightness value of the first compensation lamp bead according to the brightness value of the faulty lamp bead, the number of first compensation lamp beads, and the first compensation coefficient; When the brightness value of the first compensation lamp bead is less than or equal to the brightness threshold, determining the compensation brightness value of the first compensation lamp bead according to the brightness value of the faulty lamp bead, the number of first compensation lamp beads, and the second compensation coefficient; Performing brightness compensation on the faulty lamp bead based on the compensation brightness value of each first compensation lamp bead; Wherein, the first compensation coefficient and the second compensation coefficient are determined according to the brightness value of the first compensation lamp bead, the maximum brightness value, and the distance from the faulty lamp bead; the first compensation coefficient is greater than the second compensation coefficient.

8. The method according to claim 7, characterized in that, The method further includes: When the display frame where the first compensation lamp bead is located shares a first corner point with the display frame where the faulty lamp bead is located, determining the compensation brightness value of each second compensation lamp bead of the first compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the third compensation coefficient; When the display frame where the first compensation lamp bead is located shares a side with the display frame where the faulty lamp bead is located, determining the compensation brightness value of each second compensation lamp bead of the first compensation lamp bead according to the compensation brightness value of the first compensation lamp bead and the fourth compensation coefficient; Performing brightness weakening processing on each second compensation lamp bead according to the compensation brightness value of each second compensation lamp bead; Wherein, the display frame where the second compensation lamp bead is located shares a side or a second corner point with the display frame where the first compensation lamp bead is located, and the second corner point is the corner point of the first display area; Wherein, the third compensation coefficient and the fourth compensation coefficient are determined according to the brightness value of the first compensation lamp bead, the maximum brightness value, and the distance from the faulty lamp bead; the third compensation coefficient is greater than the fourth compensation coefficient.

9. The method according to claim 8, wherein The method further includes: When there are multiple first compensation lamp beads corresponding to the second compensation lamp bead and there are multiple compensation brightness values, obtaining the minimum compensation brightness value among the multiple compensation brightness values as the compensation brightness value of the second compensation lamp bead.

10. The method according to claim 8, characterized in that, The method further includes: When there are multiple adjacent faulty lamp beads, for one faulty lamp bead, obtain the first compensation lamp bead that is in the same column as the faulty lamp bead among the shared first compensation lamp beads between the adjacent faulty lamp beads as the first compensation lamp bead of the faulty lamp bead, and obtain the second compensation lamp bead that is in the same column as the first compensation lamp bead as the second compensation lamp bead of the first compensation lamp bead.

Images