Brightness uniformity compensation system and method

Abstract

The present disclosure relates to luminance uniformity compensation of a display panel, and provides a luminance uniformity compensation system and a luminance uniformity compensation method. The luminance uniformity compensation system includes: an edge-lit backlight module, a display panel, a luminance measurement device, a computing unit, and a local dimming control unit. The display panel is arranged above the edge-lit backlight module, and the display panel includes a plurality of blocks for local dimming. The luminance measurement device is used to measure whether the luminance of the display panel is uniform. The computing unit is used to calculate the luminance compensation value corresponding to each block when the luminance of the display panel is uneven. The local dimming control unit is used to drive the edge-lit backlight module according to the luminance compensation value corresponding to each block. The luminance uniformity compensation system performs luminance compensation in a local dimming manner, which can improve the luminance uniformity of the display panel when displaying an image.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display devices, and in particular to a system and method for improving the brightness uniformity of an edge-lit liquid crystal display device. Background Art

[0002] A liquid crystal display device includes a liquid crystal display panel that uses the transmittance of liquid crystal to display images, and a backlight module placed under the liquid crystal display panel to provide a light source for the liquid crystal display panel. Usually, an edge-lit backlight module is used to reduce the thickness of the liquid crystal display device. The edge-lit backlight module guides the light from the side light bar into a planar light source through a light guide plate to ensure brightness uniformity. However, in actual situations, there are many factors that affect the brightness uniformity of the liquid crystal display panel when displaying images, resulting in poor product yield. These factors include: poor side light bar, large differences in the luminous efficiency of the multiple light-emitting diodes that make up the side light bar, large differences in the transmittance of the liquid crystal units, and errors in electronic components (such as resistors, capacitors, inductors, etc.) causing inconsistent driving currents of the light-emitting diodes. Summary of the Invention

[0003] In order to solve the above-mentioned problem of poor product yield and overcome the shortcomings of the prior art, the purpose of the present invention is to provide a luminance uniformity compensation system that performs luminance compensation in a local dimming manner to improve the luminance uniformity of the liquid crystal display panel when displaying images.

[0004] The technical solution adopted in the present invention is:

[0005] A luminance uniformity compensation system includes an edge-lit backlight module, a display panel, a luminance measurement device, a computing unit, and a local dimming control unit. The display panel is disposed above the edge-lit backlight module and includes multiple blocks for local dimming. The luminance measurement device measures the uniformity of the display panel's luminance. The computing unit calculates a luminance compensation value corresponding to each block when the display panel's luminance is uneven. The local dimming control unit drives the edge-lit backlight module based on the luminance compensation value corresponding to each block.

[0006] In some embodiments, the local dimming control unit includes a memory unit for storing a luminance compensation value corresponding to each block.

[0007] In some embodiments, the display panel has multiple measurement points, and the luminance measurement device measures whether the luminance of the display panel is uniform by: measuring multiple luminance values ​​corresponding to the measurement points when they are illuminated; calculating the ratio of the maximum and minimum luminance values; and comparing the ratio with a specification threshold to determine whether the luminance of the display panel is uniform.

[0008] In some embodiments, an edge-lit backlight module includes a light guide plate, an upper light bar, and a lower light bar. The upper light bar and the lower light bar are respectively arranged on opposite sides of the light guide plate, and light generated by the upper light bar and the lower light bar is guided to the display panel through the light guide plate; each of the upper light bar and the lower light bar has a plurality of first light source groups and a plurality of second light source groups arranged in an interlaced manner along the extension direction of the upper light bar and the lower light bar; each of the first light source group and the second light source group includes at least one light-emitting diode.

[0009] In some embodiments, the block of the display panel includes multiple upper odd-numbered areas and multiple upper even-numbered areas corresponding to the first light source group and the second light source group of the upper light bar, respectively. The block of the display panel also includes multiple lower odd-numbered areas and multiple lower even-numbered areas corresponding to the first light source group and the second light source group of the lower light bar, respectively.

[0010] In some embodiments, the operation unit calculates the luminance compensation value corresponding to each block in the following manner: the operation unit controls the luminance measurement device to measure the center point luminance value corresponding to each of the upper half odd area and the lower half odd area when the area is lit; and when the center point luminance value of one of the upper half odd area and the lower half odd area is not equal to the standard value, the operation unit controls the local dimming control unit to perform luminance compensation on the one of the upper half odd area and the lower half odd area, thereby calculating the luminance compensation value corresponding to the one of the upper half odd area and the lower half odd area.

[0011] In some embodiments, the method in which the operation unit calculates the luminance compensation value corresponding to each block further includes: after performing luminance compensation on the upper odd area and the lower odd area, the operation unit controls the luminance measurement device to measure the center point luminance value corresponding to each of the upper even area and the lower even area when the luminance value is lit; and when the center point luminance value of one of the upper even area and the lower even area is not equal to the standard value, the operation unit controls the local dimming control unit to perform luminance compensation on one of the upper even area and the lower even area, thereby calculating the luminance compensation value corresponding to one of the upper even area and the lower even area.

[0012] In some embodiments, the operation unit controls the local dimming control unit to perform luminance compensation on one of the upper odd area and the lower odd area so that the luminance value of the center point of the upper odd area and the lower odd area is equal to the standard value, and the operation unit controls the local dimming control unit to perform luminance compensation on one of the upper even area and the lower even area so that the luminance value of the center point of the upper even area and the lower even area is equal to the standard value.

[0013] In some embodiments, when the luminance compensation value corresponding to one of the blocks exceeds a maximum compensable range, the computing unit determines that the display device including the edge-lit backlight module and the display panel is unqualified.

[0014] In some embodiments, the luminance compensation value corresponding to one of the blocks is a driving current parameter value of the edge-lit backlight module.

[0015] Another object of the present invention is to provide a luminance uniformity compensation method that performs luminance compensation in a local dimming manner to improve luminance uniformity when a liquid crystal display panel displays an image.

[0016] The technical solution adopted in the present invention is:

[0017] A luminance uniformity compensation method includes: measuring the luminance uniformity of a display panel using a luminance measurement device, wherein the display panel includes multiple blocks for local dimming; when the luminance of the display panel is non-uniform, calculating a luminance compensation value corresponding to each block using a computing unit; and driving an edge-lit backlight module using a local dimming control unit according to the luminance compensation value corresponding to each block, wherein the display panel is disposed above the edge-lit backlight module.

[0018] In some embodiments, the local dimming control unit includes a memory unit for storing a luminance compensation value corresponding to each block.

[0019] In some embodiments, the display panel has multiple measurement points, and the method for measuring whether the brightness of the display panel is uniform through the brightness measurement device is: measuring multiple brightness values ​​corresponding to the measurement points when they are lit; calculating the ratio of the maximum and minimum brightness values; and comparing the ratio with the specification threshold to determine whether the brightness of the display panel is uniform.

[0020] In some embodiments, an edge-lit backlight module includes a light guide plate, an upper light bar, and a lower light bar. The upper light bar and the lower light bar are respectively arranged on opposite sides of the light guide plate, and light generated by the upper light bar and the lower light bar is guided to the display panel through the light guide plate; each of the upper light bar and the lower light bar has a plurality of first light source groups and a plurality of second light source groups arranged in an interlaced manner along the extension direction of the upper light bar and the lower light bar; each of the first light source group and the second light source group includes at least one light-emitting diode.

[0021] In some embodiments, the block of the display panel includes multiple upper odd-numbered areas and multiple upper even-numbered areas corresponding to the first light source group and the second light source group of the upper light bar, respectively. The block of the display panel also includes multiple lower odd-numbered areas and multiple lower even-numbered areas corresponding to the first light source group and the second light source group of the lower light bar, respectively.

[0022] In some embodiments, the method for calculating the luminance compensation value corresponding to each of the blocks through the operation unit is: the operation unit controls the luminance measurement device to measure the center point luminance value corresponding to each of the upper odd area and the lower odd area when it is lit; and when the center point luminance value of one of the upper odd area and the lower odd area is not equal to the standard value, the operation unit controls the local dimming control unit to perform luminance compensation on one of the upper odd area and the lower odd area, thereby calculating the luminance compensation value corresponding to one of the upper odd area and the lower odd area.

[0023] In some embodiments, the method of calculating the luminance compensation value corresponding to each of the blocks through the computing unit further includes: after performing luminance compensation on the upper odd area and the lower odd area, the computing unit controls the luminance measurement device to measure the center point luminance value corresponding to each of the upper even area and the lower even area when the luminance is turned on; and when the center point luminance value of one of the upper even area and the lower even area is not equal to the standard value, the computing unit controls the local dimming control unit to perform luminance compensation on one of the upper even area and the lower even area, thereby calculating the luminance compensation value corresponding to one of the upper even area and the lower even area.

[0024] In some embodiments, the operation unit controls the local dimming control unit to perform luminance compensation on one of the upper odd area and the lower odd area so that the luminance value of the center point of the upper odd area and the lower odd area is equal to the standard value, and the operation unit controls the local dimming control unit to perform luminance compensation on one of the upper even area and the lower even area so that the luminance value of the center point of the upper even area and the lower even area is equal to the standard value.

[0025] In some embodiments, the luminance uniformity compensation method further includes: when a luminance compensation value corresponding to one of the blocks exceeds a maximum compensable range, the computing unit determines that the display device including the edge-lit backlight module and the display panel is unqualified.

[0026] In some embodiments, the luminance compensation value corresponding to one of the blocks is a driving current parameter value of the edge-lit backlight module.

[0027] The beneficial effects achieved by the technical solution of the present disclosure are to repair products with poor luminance uniformity through luminance uniformity compensation, optimize the maximum brightness of the product, and improve the luminance uniformity and contrast when the liquid crystal display panel displays images.

[0028] In order to make the above features and advantages of the present disclosure more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] A better understanding of the present disclosure can be gained from the following detailed description in conjunction with the accompanying drawings. It should be noted that, in accordance with standard industry practice, the various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or decreased to facilitate clarity of discussion.

[0030] Figure 1 is a schematic diagram illustrating a luminance uniformity compensation system according to an embodiment of the present disclosure;

[0031] Figure 2 is a schematic diagram illustrating the arrangement of an edge-lit backlight module and a display panel according to an embodiment of the present disclosure;

[0032] Figure 3 is a flow chart illustrating a luminance uniformity compensation method implemented by a luminance uniformity compensation system according to an embodiment of the present disclosure;

[0033] Figure 4a and Figure 4b is a schematic diagram illustrating a method for measuring luminance uniformity of a display panel according to an embodiment of the present disclosure;

[0034] Figure 5 FIG. 4 is a schematic diagram illustrating details of a luminance uniformity compensation system according to an embodiment of the present disclosure.

[0035]

Explanation of symbols

[0036] 100: Brightness uniformity compensation system

[0037] 110: Edge-lit backlight module

[0038] 112: Light guide plate

[0039] 114: Upper light bar

[0040] 116: Lower light bar

[0041] 120: Display panel

[0042] 130: luminance measurement device

[0043] 140: Arithmetic unit

[0044] 150: Local dimming control unit

[0045] 152: Memory Unit

[0046] 160: LCD driver circuit

[0047] 170: LED drive circuit

[0048] 1000: Brightness uniformity compensation method

[0049] 1100-1700: Steps

[0050] D1: lower odd-numbered area

[0051] D2: Lower half even-numbered area

[0052] L1: First light source group

[0053] L2: Second light source group

[0054] LED: Light Emitting Diode

[0055] M1-M13: Measuring points

[0056] U1: Upper odd-numbered area

[0057] U2: Upper even-numbered area DETAILED DESCRIPTION

[0058] The following is a detailed discussion of embodiments of the present invention. However, it should be understood that the embodiments provide many applicable concepts that can be implemented in a wide variety of specific contexts. The embodiments discussed and disclosed are for illustrative purposes only and are not intended to limit the scope of the present invention. The terms "first," "second," "third," etc., as used herein, do not specifically denote order or precedence; they are used solely to distinguish between elements or operations described using the same technical terminology.

[0059] Figure 1 FIG2 is a schematic diagram illustrating a luminance uniformity compensation system 100 according to an embodiment of the present disclosure. The luminance uniformity compensation system 100 includes an edge-lit backlight module 110, a display panel 120, a luminance measurement device 130, a computing unit 140, and a local dimming control unit 150. The display panel 120 is disposed above the edge-lit backlight module 110.

[0060] Figure 2 Schematic diagram illustrating the configuration of an edge-lit backlight module 110 and a display panel 120 according to an embodiment of the present disclosure. The edge-lit backlight module 110 includes a light guide plate 112, an upper light bar 114, and a lower light bar 116. The upper light bar 114 and the lower light bar 116 are respectively disposed on opposite upper and lower sides of the light guide plate 112. The upper light bar 114 includes a plurality of first light source groups L1 and a plurality of second light source groups L2 that are staggered along the extension direction of the upper light bar 114. The lower light bar 116 includes a plurality of first light source groups L1 and a plurality of second light source groups L2 that are staggered along the extension direction of the lower light bar 116. It is worth noting that the present invention does not limit the number and location of the light bars of the edge-lit backlight module. In other words, the number of light bars may be one or four, or the light bars may be disposed on the left and / or right side of the light guide plate.

[0061] like Figure 2 As shown, each of the first light source group L1 and the second light source group L2 of the upper light bar 114 and the first light source group L1 and the second light source group L2 of the lower light bar 116 includes two LEDs. However, the present invention is not limited to this. In an embodiment of the present invention, each of the first light source group L1 and the second light source group L2 of the upper light bar 114 and the first light source group L1 and the second light source group L2 of the lower light bar 116 includes at least one LED. The edge-lit backlight module 110 guides the light generated by the LEDs of the upper light bar 114 and the lower light bar 116 to the display panel 120 through the light guide plate 112.

[0062] like Figure 2 As shown, the display panel 120 includes multiple blocks for local dimming. Specifically, the multiple blocks of the display panel 120 include multiple upper odd-numbered areas U1 corresponding to the first light source group L1 of the upper light bar 114, multiple upper even-numbered areas U2 corresponding to the second light source group L2 of the upper light bar 114, multiple lower odd-numbered areas D1 corresponding to the first light source group L1 of the lower light bar 116, and multiple lower even-numbered areas D2 corresponding to the second light source group L2 of the lower light bar 116.

[0063] Please return Figure 1 The luminance measurement device 130 is used to measure whether the luminance of the display panel 120 is uniform when displaying a white image. In the embodiment of the present disclosure, the luminance measurement device 130 may be an optical measurement lens. The calculation unit 140 receives the measurement result of the luminance measurement device 130. When the luminance of the display panel 120 is uneven when displaying a white image, the calculation unit 140 is used to calculate the luminance compensation value corresponding to each block of the display panel 120. The local dimming control unit 150 is used to drive the edge-lit backlight module 110 in a local dimming manner according to the luminance compensation value corresponding to each block of the display panel 120.

[0064] Figure 3 1 is a flow chart illustrating a luminance uniformity compensation method 1000 implemented by the luminance uniformity compensation system 100 according to an embodiment of the present disclosure. The luminance uniformity compensation method 1000 includes steps 1100-1700. Figures 1 to 3 In step 1100 , the luminance uniformity of the display panel 120 when displaying a white image is measured by the luminance measurement device 130 .

[0065] Figure 4a and Figure 4b1 is a schematic diagram illustrating a method for measuring the luminance uniformity of the display panel 120 according to an embodiment of the present disclosure. The method for measuring the luminance uniformity of the display panel 120 complies with the display measurement standard established by the Video Electronics Standards Association (VESA), which can be a 5-point measurement method ( Figure 4a ), 9-point measurement method, 13-point measurement method ( Figure 4b ) or 25-point measurement method, etc. Figure 4a and Figure 4b As shown, the display panel 120 has five measurement points M1-M5 ( Figure 4a ) or 13 measuring points M1-M13 ( Figure 4b ), in step 1100, the luminance measurement device 130 measures the luminance uniformity of the display panel 120 when displaying a white screen by measuring multiple luminance values ​​corresponding to the five measurement points M1-M5 or the 13 measurement points M1-M13 of the display panel 120 when the display panel 120 is on (displaying a white screen). Then, the luminance uniformity of the display panel 120 is calculated by calculating the ratio of the maximum luminance value to the minimum luminance value among the multiple luminance values ​​corresponding to the five measurement points M1-M5 or the 13 measurement points M1-M13. This is used to measure the luminance uniformity of the entire illuminated screen of the display panel 120. In other embodiments of the present disclosure, the luminance uniformity of the display panel 120 may also be the ratio of the minimum luminance value to the maximum luminance value.

[0066] In step 1200, the luminance uniformity of the display panel 120 is compared with a specification threshold to determine whether the luminance of the display panel 120 is uniform. If the luminance of the display panel 120 is determined to be uniform, the process proceeds to step 1600; if the luminance of the display panel 120 is determined to be non-uniform, the process proceeds to step 1300. The specification threshold may be a default value or a factory acceptance value set by the supplier. For example, if the luminance uniformity of the display panel 120 is less than the specification threshold, the luminance of the display panel 120 is determined to be non-uniform; if the luminance uniformity of the display panel 120 is not less than the specification threshold, the luminance of the display panel 120 is determined to be uniform.

[0067] In step 1300, (1) the upper odd area U1 and the lower odd area D1 of the display panel 120 are illuminated; (2) the computing unit 140 controls the luminance measurement device 130 to measure the corresponding center point luminance value of each of the upper odd area U1 and the lower odd area D1 when each of the upper odd area U1 and the lower odd area D1 is illuminated; (3) when the center point luminance value of one of the upper odd area U1 and the lower odd area D1 is not equal to the standard value, the computing unit 140 controls the local dimming control unit 150 to perform luminance compensation on the one of the upper odd area U1 and the lower odd area D1, thereby calculating the luminance compensation value corresponding to the one of the upper odd area U1 and the lower odd area D1.

[0068] In the embodiment of the present disclosure, the computing unit 140 controls the local dimming control unit 150 to perform luminance compensation on one of the upper odd-numbered areas U1 and the lower odd-numbered areas D1 so that the luminance value at the center point of the upper odd-numbered area U1 or the lower odd-numbered area D1 is equal to a standard value. The standard value may be a default value or a factory acceptance value set by a supplier. The luminance compensation value corresponding to the one of the upper odd-numbered area U1 and the lower odd-numbered area D1 is the driving current (driving current parameter value) to be output to the light-emitting diode LED of the first light source group L1 or the first light source group L2 corresponding to the one of the upper odd-numbered area U1 and the lower odd-numbered area D1 when the edge-lit backlight module 110 performs local dimming on the one of the upper odd-numbered area U1 and the lower odd-numbered area D1.

[0069] When the driving current of the LEDs LEDs of the first light source group L1 or the first light source group L2 corresponding to each of the upper odd-numbered area U1 and the lower odd-numbered area D1 falls between the maximum driving current value and the minimum driving current value of the LEDs, compensation is determined to be possible, and the process proceeds to step 1400. When the driving current of the LEDs LEDs of the first light source group L1 or the first light source group L2 corresponding to at least one of the upper odd-numbered area U1 and the lower odd-numbered area D1 exceeds the maximum driving current value of the LEDs (exceeds the maximum compensable range) or is lower than the minimum driving current value of the LEDs, compensation is determined to be unavailable, and the process proceeds to step 1500, where the computing unit 140 determines that the display device including the edge-lit backlight module 110 and the display panel 120 is unqualified (NG).

[0070] In step 1400, (1) the upper even area U2 and the lower even area D2 of the display panel 120 are illuminated; (2) the computing unit 140 controls the luminance measurement device 130 to measure the corresponding center point luminance value of each of the upper even area U2 and the lower even area D2 when each of the upper even area U2 and the lower even area D2 is illuminated; (3) when the center point luminance value of one of the upper even area U2 and the lower even area D2 is not equal to the standard value, the computing unit 140 controls the local dimming control unit 150 to perform luminance compensation on the one of the upper even area U2 and the lower even area D2, thereby calculating the luminance compensation value corresponding to the one of the upper even area U2 and the lower even area D2.

[0071] In the embodiment of the present disclosure, the computing unit 140 controls the local dimming control unit 150 to perform luminance compensation on one of the upper even area U2 and the lower even area D2 so that the luminance value at the center point of the upper even area U2 and the lower even area D2 is equal to a standard value. The luminance compensation value corresponding to the one of the upper even area U2 and the lower even area D2 is the driving current (driving current parameter value) to be output to the light-emitting diode LED of the first light source group L1 or the first light source group L2 corresponding to the one of the upper even area U2 and the lower even area D2 when the edge-lit backlight module 110 performs local dimming on the one of the upper even area U2 and the lower even area D2.

[0072] When the driving current of the light-emitting diode LED of the first light source group L1 or the first light source group L2 corresponding to each of the upper even area U2 and the lower even area D2 falls between the maximum driving current value and the minimum driving current value of the light-emitting diode LED, it is determined that compensation is possible, and the process returns to step 1200. The local dimming control unit 150 is used to drive the edge-lit backlight module 110 according to the luminance compensation value corresponding to each block (upper odd area U1, lower odd area D1, upper even area U2, and lower even area D2) obtained in steps 1300 and 1400, and again determines whether the luminance of the display panel 120 is uniform. When the driving current of the light-emitting diode LED of the first light source group L1 or the first light source group L2 corresponding to at least one of the upper even area U2 and the lower even area D2 exceeds the maximum driving current value of the light-emitting diode LED (exceeds the maximum compensable range) or is lower than the minimum driving current value of the light-emitting diode LED, it is determined that compensation is not possible, and the process goes to step 1500, and the operation unit 140 determines that the display device including the edge-lit backlight module 110 and the display panel 120 is unqualified (NG).

[0073] If the luminance of the display panel 120 is determined to be uniform in step 1200, the process proceeds to step 1600 to write the luminance compensation values ​​corresponding to the upper odd area U1, the lower odd area D1, the upper even area U2, and the lower even area D2 into the memory unit 152 of the local dimming control unit 150. In other words, the memory unit 152 of the local dimming control unit 150 is used to store the luminance compensation values ​​corresponding to each block (the upper odd area U1, the lower odd area D1, the upper even area U2, and the lower even area D2).

[0074] After step 1600 , the process proceeds to step 1700 , where the computing unit 140 determines that the display device including the edge-lit backlight module 110 and the display panel 120 is qualified (PASS).

[0075] Figure 5 FIG. 1 is a detailed diagram illustrating a luminance uniformity compensation system 100 according to an embodiment of the present disclosure. Figure 1 , Figure 5 The luminance uniformity compensation system 100 further includes a liquid crystal driving circuit 160 and an LED driving circuit 170. The liquid crystal driving circuit 160 is used to drive the liquid crystal driving circuit 160. The local dimming control unit 150 provides the LED driving circuit 170 with the luminance compensation value (driving current parameter value) corresponding to each block of the display panel 120 (upper odd area U1, lower odd area D1, upper even area U2, and lower even area D2). This enables the LED driving circuit 170 to output different driving currents to the corresponding LEDs of the first light source group L1 or the first light source group L2, thereby achieving local dimming operation.

[0076] In summary, one of the effects of the present invention is to improve product yield by performing calibration through local dimming. The present invention measures the luminance of each block of the display panel through a luminance measurement device, and adjusts the luminance value of each block of the display panel through local dimming. Therefore, the present invention can repair products with poor luminance uniformity, and the present invention can optimize the maximum brightness of the product and improve the display contrast. Furthermore, the present invention can effectively improve the display image quality of the product. Another effect of the present invention is that by dividing the display panel into multiple blocks, the block that needs luminance compensation can be more accurately found, and the luminance value of the block can be adjusted through local dimming. Another effect of the present invention is that by compensating the luminance value of each block of the display panel through local dimming, it can effectively improve the defective parts and increase the product yield, so that the product can more easily pass high-definition test specifications such as HDR 400 / 600 / 100.

[0077] The above summarizes the features of several embodiments so that those skilled in the art can better understand the aspects of the present disclosure. Those skilled in the art will understand that they can easily use this disclosure as a basis for designing or modifying other processes and structures to achieve the same goals and / or achieve the same advantages as the embodiments described herein. Those skilled in the art will also understand that these equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they can make various changes, substitutions, and modifications without departing from the spirit and scope of the present disclosure.

Claims

1. A brightness uniformity compensation system, characterized in that: Include: A side-lit backlight module; a display panel disposed above the edge-lit backlight module, wherein the display panel includes a plurality of blocks for local dimming, wherein the plurality of blocks are divided into a first subset and a second subset, wherein the range covered by the first subset and the range covered by the second subset do not overlap with each other, and wherein the plurality of blocks included in the first subset and the plurality of blocks included in the second subset are interlaced only along an extension direction of a side light strip included in the edge-lit backlight module; a luminance measurement device for measuring whether the luminance of the display panel is uniform and measuring a luminance value at a center point of each of the plurality of blocks; a calculation unit for calculating a luminance compensation value corresponding to each of the plurality of blocks when the luminance of the display panel is uneven; and a local dimming control unit for driving the edge-lit backlight module according to the luminance compensation value corresponding to each of the plurality of blocks; The calculation unit calculates the luminance compensation value corresponding to each of the plurality of blocks in the following manner: When the luminance of the display panel is uneven, the plurality of blocks included in the first subset are illuminated during a first time interval, and the luminance measurement device is controlled to measure the center point luminance value of each of the plurality of blocks included in the first subset when illuminated during the first time interval, so that the local dimming control unit performs luminance compensation for each of the plurality of blocks included in the first subset accordingly; and When the luminance of the display panel is uneven, the plurality of blocks included in the second subset are illuminated during a second time interval, and the luminance measurement device is controlled to measure the center point luminance value of each of the plurality of blocks included in the second subset when illuminated during the second time interval, so that the local dimming control unit performs luminance compensation for each of the plurality of blocks included in the second subset accordingly. The second time interval is different from the first time interval.

2. The luminance uniformity compensation system according to claim 1, wherein: The local dimming control unit includes a memory unit for storing the luminance compensation value corresponding to each of the plurality of blocks.

3. The luminance uniformity compensation system according to claim 1, wherein: The display panel has a plurality of measurement points, wherein the luminance measurement device measures whether the luminance of the display panel is uniform in the following manner: measuring a plurality of luminance values ​​respectively corresponding to the plurality of measuring points when the plurality of measuring points are illuminated; Calculating a ratio of a maximum value to a minimum value of the plurality of luminance values; and The ratio is compared with a specification threshold to determine whether the luminance of the display panel is uniform.

4. The luminance uniformity compensation system according to claim 1, wherein: The edge-lit backlight module includes a light guide plate, an upper light bar, and a lower light bar. The upper light bar and the lower light bar are respectively disposed on opposite sides of the light guide plate, and light generated by the upper light bar and the lower light bar are guided to the display panel through the light guide plate. Each of the upper light bar and the lower light bar comprises a plurality of first light source groups and a plurality of second light source groups that are staggered and arranged along the extending direction of the upper light bar and the lower light bar; Each of the plurality of first light source groups and the plurality of second light source groups includes at least one light emitting diode.

5. The luminance uniformity compensation system according to claim 4, wherein: The plurality of blocks of the display panel include a plurality of upper odd-numbered areas and a plurality of upper even-numbered areas corresponding to the plurality of first light source groups and the plurality of second light source groups of the upper light bar, respectively. The multiple blocks of the display panel further include multiple lower odd-numbered areas and multiple lower even-numbered areas corresponding to the multiple first light source groups and the multiple second light source groups of the lower light bar, respectively.

6. The luminance uniformity compensation system according to claim 5, wherein: When the luminance of the display panel is non-uniform, the calculation unit controls the luminance measurement device to measure the luminance value of the center point of each of the plurality of blocks included in the first subset when the blocks are illuminated during the first time interval in the following manner: The computing unit controls the luminance measuring device to measure the corresponding central point luminance value of each of the plurality of upper odd-numbered areas and the plurality of lower odd-numbered areas when the upper odd-numbered areas are illuminated during the first time interval; and The calculation unit calculates the luminance compensation value corresponding to each of the plurality of blocks in the following manner: When the center point luminance value of one of the multiple upper odd areas and the multiple lower odd areas is not equal to a standard value, the operation unit controls the local dimming control unit to perform luminance compensation on the one of the multiple upper odd areas and the multiple lower odd areas, thereby calculating the luminance compensation value corresponding to the one of the multiple upper odd areas and the multiple lower odd areas.

7. The luminance uniformity compensation system according to claim 6, wherein: When the luminance of the display panel is non-uniform, the calculation unit controls the luminance measurement device to measure the luminance value of the center point of each of the plurality of blocks included in the second subset when the blocks are illuminated during the second time interval in the following manner: The computing unit controls the luminance measuring device to measure the corresponding central point luminance value of each of the plurality of upper half even-numbered areas and the plurality of lower half even-numbered areas when the upper half even-numbered areas are illuminated during the second time interval; and The calculation unit calculates the luminance compensation value corresponding to each of the plurality of blocks in the following manner: When the center point luminance value of one of the multiple upper half even areas and the multiple lower half even areas is not equal to the standard value, the operation unit controls the local dimming control unit to perform luminance compensation on the one of the multiple upper half even areas and the multiple lower half even areas, thereby calculating the luminance compensation value corresponding to the one of the multiple upper half even areas and the multiple lower half even areas.

8. The luminance uniformity compensation system according to claim 7, wherein: The operation unit controls the local dimming control unit to perform luminance compensation on one of the plurality of upper odd-numbered areas and the plurality of lower odd-numbered areas so that the central point luminance value of the one of the plurality of upper odd-numbered areas and the plurality of lower odd-numbered areas is equal to the standard value. The operation unit controls the local dimming control unit to perform luminance compensation on one of the plurality of upper-half even areas and the plurality of lower-half even areas so that the central point luminance value of the one of the plurality of upper-half even areas and the plurality of lower-half even areas is equal to the standard value.

9. The luminance uniformity compensation system according to claim 1, wherein: When the luminance compensation value corresponding to one of the plurality of blocks exceeds a maximum compensable range, the computing unit determines that a display device including the edge-lit backlight module and the display panel is unqualified.

10. The luminance uniformity compensation system according to claim 1, wherein: The luminance compensation value corresponding to one of the plurality of blocks is a driving current parameter value of the edge-lit backlight module.

11. A brightness uniformity compensation method, characterized in that: Include: Measuring whether the luminance of a display panel is uniform using a luminance measurement device, wherein the display panel includes a plurality of blocks for local dimming, wherein the plurality of blocks are divided into a first subset and a second subset, and an area covered by the first subset and an area covered by the second subset do not overlap with each other; When the luminance of the display panel is non-uniform, the plurality of blocks included in the first subset are illuminated during a first time interval, and a luminance value of a center point of each of the plurality of blocks included in the first subset when illuminated during the first time interval is measured by the luminance measurement device during the first time interval, so as to perform luminance compensation for each of the plurality of blocks included in the first subset; When the luminance of the display panel is non-uniform, the plurality of blocks included in the second subset are illuminated during a second time interval, and the luminance measurement device is used to measure the center point luminance value of each of the plurality of blocks included in the second subset when illuminated during the second time interval, so as to perform luminance compensation for each of the plurality of blocks included in the second subset, wherein the second time interval is different from the first time interval; When the luminance of the display panel is non-uniform, a luminance compensation value corresponding to each of the plurality of blocks is calculated by a calculation unit; and A local dimming control unit is used to drive an edge-lit backlight module according to the luminance compensation value corresponding to each of the multiple blocks, wherein the display panel is arranged above the edge-lit backlight module, and the multiple blocks included in the first subset and the multiple blocks included in the second subset are staggered with each other only along the extension direction of the side light strip included in the edge-lit backlight module.

12. The luminance uniformity compensation method according to claim 11, wherein: The local dimming control unit includes a memory unit for storing the luminance compensation value corresponding to each of the plurality of blocks.

13. The luminance uniformity compensation method according to claim 11, wherein: The display panel has a plurality of measurement points, wherein the brightness measurement device is used to measure whether the brightness of the display panel is uniform in the following manner: measuring a plurality of luminance values ​​respectively corresponding to the plurality of measuring points when the plurality of measuring points are illuminated; Calculating a ratio of a maximum value to a minimum value of the plurality of luminance values; and The ratio is compared with a specification threshold to determine whether the luminance of the display panel is uniform.

14. The luminance uniformity compensation method according to claim 11, wherein: The edge-lit backlight module includes a light guide plate, an upper light bar, and a lower light bar. The upper light bar and the lower light bar are respectively disposed on opposite sides of the light guide plate, and light generated by the upper light bar and the lower light bar are guided to the display panel through the light guide plate. Each of the upper light bar and the lower light bar comprises a plurality of first light source groups and a plurality of second light source groups that are staggered and arranged along the extending direction of the upper light bar and the lower light bar; Each of the plurality of first light source groups and the plurality of second light source groups includes at least one light emitting diode.

15. The luminance uniformity compensation method according to claim 14, wherein: The plurality of blocks of the display panel include a plurality of upper odd-numbered areas and a plurality of upper even-numbered areas corresponding to the plurality of first light source groups and the plurality of second light source groups of the upper light bar, respectively. The multiple blocks of the display panel further include multiple lower odd-numbered areas and multiple lower even-numbered areas corresponding to the multiple first light source groups and the multiple second light source groups of the lower light bar, respectively.

16. The luminance uniformity compensation method according to claim 15, wherein: When the luminance of the display panel is uneven, the calculation unit is used to control the luminance measurement device to measure the luminance value of the center point of each of the plurality of blocks included in the first subset when the blocks are illuminated during the first time interval. The computing unit controls the luminance measuring device to measure the corresponding central point luminance value of each of the plurality of upper odd-numbered areas and the plurality of lower odd-numbered areas when the upper odd-numbered areas are illuminated during the first time interval; and The method for calculating the brightness compensation value corresponding to each of the plurality of blocks by the calculation unit is: When the center point luminance value of one of the multiple upper odd areas and the multiple lower odd areas is not equal to a standard value, the operation unit controls the local dimming control unit to perform luminance compensation on the one of the multiple upper odd areas and the multiple lower odd areas, thereby calculating the luminance compensation value corresponding to the one of the multiple upper odd areas and the multiple lower odd areas.

17. The luminance uniformity compensation method according to claim 16, wherein: When the luminance of the display panel is non-uniform, the calculation unit is used to control the luminance measurement device to measure the luminance value of the center point of each of the plurality of blocks included in the second subset when the blocks are illuminated during the second time interval. The computing unit controls the luminance measuring device to measure the corresponding central point luminance value of each of the plurality of upper half even-numbered areas and the plurality of lower half even-numbered areas when the upper half even-numbered areas are illuminated during the second time interval; and The method for calculating the brightness compensation value corresponding to each of the plurality of blocks by the calculation unit is: When the center point luminance value of one of the multiple upper half even areas and the multiple lower half even areas is not equal to the standard value, the operation unit controls the local dimming control unit to perform luminance compensation on the one of the multiple upper half even areas and the multiple lower half even areas, thereby calculating the luminance compensation value corresponding to the one of the multiple upper half even areas and the multiple lower half even areas.

18. The luminance uniformity compensation method according to claim 17, wherein: The operation unit controls the local dimming control unit to perform luminance compensation on one of the plurality of upper odd-numbered areas and the plurality of lower odd-numbered areas so that the central point luminance value of the one of the plurality of upper odd-numbered areas and the plurality of lower odd-numbered areas is equal to the standard value. The operation unit controls the local dimming control unit to perform luminance compensation on one of the plurality of upper-half even areas and the plurality of lower-half even areas so that the central point luminance value of the one of the plurality of upper-half even areas and the plurality of lower-half even areas is equal to the standard value.

19. The luminance uniformity compensation method according to claim 11, wherein: Also includes: When the luminance compensation value corresponding to one of the plurality of blocks exceeds a maximum compensable range, the computing unit determines that a display device including the edge-lit backlight module and the display panel is unqualified.

20. The brightness uniformity compensation method according to claim 11, wherein: The luminance compensation value corresponding to one of the plurality of blocks is a driving current parameter value of the edge-lit backlight module.

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