Display device and driving method of display device

Abstract

The application discloses a display device and a driving method thereof, and relates to the technical field of display, which comprises a first liquid crystal panel and a backlight module. The first liquid crystal panel comprises a display area, a first substrate and a plurality of display sub-pixels, the display area comprises a detection area, the detection area comprises a plurality of detection sub-areas, and the detection sub-areas comprise a plurality of display sub-pixels. The backlight module comprises a plurality of backlight sub-areas, the backlight sub-areas are vertically projected on the first substrate and located in the vertical projection of the detection sub-areas on the first substrate, and at least one of the detection sub-areas is an adjusting sub-area. An adjusting module is configured to adjust the gray voltage received by at least one display sub-pixel in the adjusting sub-area and / or adjust the luminous brightness of at least one backlight sub-area in the adjusting sub-area, so as to adjust the light-emitting brightness of the adjusting sub-area to be less than or equal to a preset brightness, thereby reducing the brightness difference between the adjusting sub-area and other detection sub-areas and improving the brightness uniformity of the display device under low gray.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display device and a driving method for the display device. Background Technology

[0002] In existing liquid crystal displays (LCDs), the driver chip is usually directly bonded to the glass (Chip On Glass, COG). Specifically, this means using anisotropic conductive film (ACF) to directly press the pins of the driver chip face-to-face with the electrode terminals of the glass substrate. However, after bonding the driver chip, the LCD is prone to light leakage, which affects the display effect. Summary of the Invention

[0003] This invention provides a display device and a driving method for the display device to reduce light leakage in the adjustable zone and improve the brightness uniformity of the display device at low gray levels.

[0004] In a first aspect, embodiments of the present invention provide a display device, the display device including a first liquid crystal panel and a backlight module, wherein the backlight module provides a backlight beam for the first liquid crystal panel;

[0005] The first liquid crystal panel includes a display area, the display area includes a detection area, and the detection area includes multiple detection zones; the first liquid crystal panel includes a first substrate and multiple display sub-pixels, the display sub-pixels being located on one side of the first substrate; the detection zones include multiple display sub-pixels;

[0006] The backlight module includes multiple backlight zones, and the backlight zones are located within the vertical projection of the detection zones on the first substrate when projected vertically onto the first substrate.

[0007] At least one of the plurality of detection zones is the zone to be adjusted;

[0008] The adjustment module is configured to adjust the grayscale voltage received by at least one of the display sub-pixels in the adjustment zone, and / or adjust the luminous brightness of at least one of the backlight zones in the adjustment zone, thereby adjusting the luminous brightness of the adjustment zone to be less than or equal to a preset brightness.

[0009] Secondly, embodiments of the present invention also provide a driving method for a display device, applied to any of the display devices described in the first aspect, the driving method comprising:

[0010] Obtain the output brightness of each detection zone in the detection area;

[0011] Based on the light output brightness of each detection zone, at least one zone to be adjusted is obtained;

[0012] Adjust the grayscale voltage received by at least one of the display sub-pixels in the area to be adjusted, and / or adjust the luminous brightness of at least one of the backlight areas in the area to be adjusted, thereby adjusting the luminous brightness of the area to be adjusted to be less than or equal to a preset brightness.

[0013] This invention provides a display device in which multiple detection zones include at least one zone to be adjusted. Since the light output brightness of the zone to be adjusted is determined by the grayscale voltage of multiple display sub-pixels in the zone to be adjusted and the light emission brightness of multiple backlight zones in the zone to be adjusted, after determining the preset brightness of the zone to be adjusted, the grayscale voltage received by at least one display sub-pixel in the zone to be adjusted can be adjusted by an adjustment module, and / or the light emission brightness of at least one backlight zone in the zone to be adjusted can be adjusted to be less than or equal to the preset brightness. In this way, the light output brightness of the zone to be adjusted is reduced, the light leakage of the zone to be adjusted is reduced, and the difference between the light output brightness of the zone to be adjusted and the light output brightness of other detection zones is reduced, thereby improving the brightness uniformity of the display device at low grayscale levels. Attached Figure Description

[0014] Figure 1 This is a top view of a display device provided in an embodiment of the present invention;

[0015] Figure 2 This is an enlarged schematic diagram of a detection zone provided in an embodiment of the present invention;

[0016] Figure 3 It is along Figure 2 A schematic diagram of the cross-sectional structure along the AA' direction;

[0017] Figure 4 This is a top view schematic diagram of a backlight module provided in an embodiment of the present invention.

[0018] Figure 5 This is a curve showing the transmittance of a display sub-pixel versus grayscale voltage, provided by an embodiment of the present invention.

[0019] Figure 6 This is an enlarged schematic diagram of another detection zone provided in an embodiment of the present invention;

[0020] Figure 7 This is an enlarged schematic diagram of another detection zone provided in an embodiment of the present invention;

[0021] Figure 8 yes Figure 2 Another cross-sectional view along the AA' direction;

[0022] Figure 9This is a top view schematic diagram of another backlight module provided in an embodiment of the present invention;

[0023] Figure 10 This is a curve showing the transmittance of a modulated sub-pixel versus grayscale voltage, provided in an embodiment of the present invention.

[0024] Figure 11 This is an embodiment of the present invention providing a light output brightness distribution in the detection area;

[0025] Figure 12 This is a top view schematic diagram of another backlight module provided in an embodiment of the present invention;

[0026] Figure 13 This is a schematic diagram of the voltage waveform of a display sub-pixel or a dimming sub-pixel provided in an embodiment of the present invention;

[0027] Figure 14 This is a top view schematic diagram of another backlight module provided in an embodiment of the present invention;

[0028] Figure 15 This is a flowchart of a driving method for a display device provided in an embodiment of the present invention;

[0029] Figure 16 This is a flowchart of another display device driving method provided in an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be fully described below with reference to the accompanying drawings in the embodiments of this invention, through specific implementation methods. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort fall within the protection scope of this invention.

[0031] Research has found that because the bonding process of the driver chip is a high-temperature process, when the driver chip is directly bonded to the glass (Chip On Glass, COG), a temperature difference will occur between the upper and lower surfaces of the glass, causing local deformation of the glass. As a result, the light path difference changes when light passes through the deformed glass, causing the light emission brightness at that location to be too high. This leads to light leakage in the display device at low grayscale levels, affecting the brightness uniformity of the display device at low grayscale levels and resulting in poor display performance.

[0032] Figure 1 This is a top view schematic diagram of a display device provided in an embodiment of the present invention. Figure 2 This is an enlarged schematic diagram of a detection zone provided in an embodiment of the present invention. Figure 3 It is along Figure 2 A schematic diagram of the cross-sectional structure along the AA' direction, for reference. Figures 1-3 The display device provided in this embodiment of the invention includes a first liquid crystal panel 10 and a backlight module 20. The backlight module 20 provides a backlight beam to the first liquid crystal panel 10. The first liquid crystal panel 10 includes a display area AA, a detection area AB, and a plurality of detection zones 110. The first liquid crystal panel 10 includes a first substrate 120 and a plurality of display sub-pixels 130. The display sub-pixels 130 are located on one side of the first substrate 120. Image display is achieved by controlling the light emission brightness of the plurality of display sub-pixels 130. The detection zones 110 include a plurality of display sub-pixels 130. At least one of the plurality of detection zones 110 is a zone to be adjusted 1101. The display device includes an adjustment module 300. The adjustment module 300 is configured to adjust the grayscale voltage received by at least one display sub-pixel 130 in the zone to be adjusted 1101, thereby adjusting the light emission brightness of the zone to be adjusted 1101 to be less than or equal to a preset brightness. It is understood that by adjusting the grayscale voltage received by at least one display sub-pixel 130 in the adjustable partition 1101, the rotation angle of the liquid crystal molecules in the first liquid crystal panel 10 can be changed, thereby reducing the transmittance of the display sub-pixel 130 and lowering the light emission brightness of at least one display sub-pixel 130 in the adjustable partition 1101, thus reducing the light emission brightness of the adjustable partition 1101. In this embodiment, a partitioned backlight module 20 or a non-partitioned backlight module 20 can be used.

[0033] Figure 4 This is a top view structural diagram of a backlight module provided in an embodiment of the present invention. Figure 4 The diagram shows a portion of the backlight module, but not all of it. Please refer to the reference. Figure 2 and Figure 4 The backlight module 20 includes multiple backlight zones 210, the vertical projection of which lies within the vertical projection of the detection zone 110 on the first substrate 120. One detection zone 110 may correspond to at least one backlight zone 210. Figure 4The illustration uses one detection zone 110 corresponding to four backlight zones 210 as an example, but is not limited to this. At least one of the multiple detection zones 110 is the zone to be adjusted 1101. The adjustment module 300 is configured to adjust the luminous brightness of at least one backlight zone 210 in the zone to be adjusted 1101, thereby adjusting the emitted light brightness of the zone to be adjusted 1101 to be less than or equal to a preset brightness. It is understood that when the luminous brightness of at least one backlight zone 210 in the zone to be adjusted 1101 is reduced, the emitted light brightness of the zone to be adjusted 1101 is also reduced. In this embodiment, the grayscale voltage received by the display sub-pixel 130 can be adjusted, or the grayscale voltage received by the display sub-pixel 130 can be left unadjusted.

[0034] In other embodiments, the adjustment module 300 is configured to adjust the grayscale voltage received by at least one display sub-pixel 130 in the adjustment zone 1101 and to adjust the luminance of at least one backlight zone 210 in the adjustment zone 1101, thereby adjusting the luminance of the adjustment zone 1101 to be less than or equal to a preset luminance.

[0035] In this embodiment of the invention, the detection zone 110 with an output brightness greater than a preset brightness is designated as the zone to be adjusted 1101. Since the output brightness of the zone to be adjusted 1101 is determined by the grayscale voltage of the multiple display sub-pixels 130 in the zone to be adjusted 1101 and the luminous brightness of the multiple backlight zones 210 in the zone to be adjusted 1101, the grayscale voltage received by at least one display sub-pixel 130 in the zone to be adjusted 1101 can be adjusted by the adjustment module, and / or the luminous brightness of at least one backlight zone 210 in the zone to be adjusted 1101 can be adjusted to be less than or equal to the preset brightness. This adjusts the output brightness of the zone to be adjusted 1101, reduces light leakage in the zone to be adjusted 1101, and reduces the difference between the output brightness of the zone to be adjusted 1101 and the output brightness of other detection zones 110, thereby improving the brightness uniformity of the display device at low grayscale levels and improving the display effect of the display device.

[0036] For example, refer to Figure 1 The first liquid crystal panel 10 includes a display area AA and a non-display area BB. The non-display area BB is located outside the display area AA. The display area AA includes two detection areas AB, which are a first detection area AB1 and a second detection area AB2, respectively. The first detection area AB1 and the second detection area AB2 are located in the area of ​​the display area AA adjacent to the non-display area BB. The first detection area AB1 and the second detection area AB2 are arranged along a first direction X. In other embodiments, the display area AA may also include other numbers of detection areas AB.

[0037] For example, refer to Figure 1 The display device includes two adjustment modules 300, namely a first adjustment module 310 and a second adjustment module 320. The first adjustment module 310 is arranged with a first detection area AB1 along a second direction Y. The first adjustment module 310 adjusts the light output brightness of the adjustable partition 1101 in the first detection area AB1. The second adjustment module 320 is arranged with a second detection area AB2 along a second direction Y. The second adjustment module 320 adjusts the light output brightness of the adjustable partition 1101 in the second detection area AB2. In other embodiments, the display device may also include other numbers of adjustment modules 300, such as one or at least three adjustment modules 300.

[0038] For example, refer to Figure 1 The display device also includes a driver chip 40, which is bonded to the non-display area BB of the first liquid crystal panel 10. An adjustment module 300 is located within the driver chip 40, i.e., the adjustment module 300 is integrated into the driver chip 40. The display device also includes two driver chips 40, namely a first driver chip 410 and a second driver chip 420. The first adjustment module 310 is integrated into the first driver chip 410, and the second adjustment module 320 is integrated into the second driver chip 420. In one embodiment, the adjustment module 300 can also be independently disposed outside the driver chip 40, for example, the adjustment module 300 can be disposed in the non-display area BB of the first liquid crystal panel 10.

[0039] For example, the driver chip 40 is attached to the non-display area BB of the first liquid crystal panel 10. The driver chip 40 is also configured to drive the backlight module 20. That is, the same driver chip 40 can drive both the first liquid crystal panel 10 and the backlight module 20. In one embodiment, a separate driver chip can be provided for the backlight module 20. That is, one driver chip 40 drives the first liquid crystal panel 10, and another driver chip drives the backlight module 20.

[0040] For example, when driving chips are respectively provided for the first liquid crystal panel 10 and the backlight module 20, the adjustment module 300 may include a first adjustment unit and a second adjustment unit. The first adjustment unit may be integrated into the driving chip 40 on the first liquid crystal panel 10, and the second adjustment unit may be integrated into the driving chip on the backlight module 20.

[0041] refer to Figures 2-4The first liquid crystal panel 10 can be a color panel. Specifically, the first liquid crystal panel 10 includes a color filter substrate 101, an array substrate 102, and a liquid crystal layer 103 located between the color filter substrate 101 and the array substrate 102. The color filter substrate 101 includes a color resist layer 1012. The array substrate 102 includes a pixel electrode 1021, a common electrode 1022, and a thin-film transistor M. The pixel electrode 1021 is electrically connected to the drain of the thin-film transistor M, thereby providing a grayscale voltage to the display sub-pixel 130 through the thin-film transistor M. The common electrode 1022 and the pixel electrode 1021 are located on the same side of the liquid crystal layer 103. The common electrode 1022 can be located on the side of the pixel electrode 1021 closer to the backlight module 20, and together with the pixel electrode 1021, the common electrode 1022 provides an electric field to the liquid crystal layer 103. In other embodiments, the common electrode 1022 can be located between the pixel electrode 1021 and the liquid crystal layer 103. An insulating layer is provided between the common electrode 1022 and the pixel electrode 1021 to prevent unwanted electrical connections between them. In some embodiments, the common electrode 1022 may also be disposed on the color filter substrate 101. Without an electric field, the liquid crystal molecules in the liquid crystal layer 103 are in a disordered state. However, under the influence of an electric field, the liquid crystal molecules align in a specific direction, thereby changing the polarization direction of the liquid crystal layer 103, i.e., changing its transmittance. The first liquid crystal panel 10 does not emit light, thus requiring a backlight module 20 to provide a backlight beam. After the backlight beam enters the first liquid crystal panel 10, under the influence of an electric field, it is transmitted through the liquid crystal layer 103, through the transmission of different colored color resist blocks in the color resist layer 1012, and blocked by the black matrix in the color resist layer 1012, ultimately achieving color display.

[0042] For example, the detection area AB can be understood as illuminating the display area AA under a fixed low display grayscale and detecting the emitted light brightness of the display area AA. The area with a large change in emitted light brightness is the detection area AB. The detection area AB can be divided into multiple detection partitions 110, which are arranged in an array. Each detection partition 110 can represent a brightness point, and the multiple brightness points form the emitted light brightness distribution of the detection area AB. For example, one detection partition 110 can overlap with multiple backlight partitions 210, that is, the vertical projection of each detection partition 110 on the first substrate 120 can cover the vertical projection of multiple backlight partitions 210 on the first substrate 120. Thus, each detection partition 110 can provide a backlight beam through the multiple backlight partitions 210 within the detection partition 110.

[0043] At least one of the multiple detection zones 110 is the zone to be adjusted 1101. It can be understood that the detection area AB is the area with a large change in light output brightness in the display area AA. The detection area AB includes multiple detection zones 110, each of which can represent a brightness point. The multiple detection zones 110 form the light output brightness distribution of the detection area AB. Then, the detection zone 110 with a light output brightness greater than a preset brightness can be recorded as the zone to be adjusted 1101. The reason why the light output brightness of the zone to be adjusted 1101 is greater than the preset brightness is that the high temperature during the bonding of the driver chip causes local deformation of the glass, which in turn makes the light output brightness of the zone to be adjusted 1101 larger. As can be seen from the above, the first liquid crystal panel 10 does not emit light and requires the backlight module 20 to provide a backlight beam for the first liquid crystal panel 10. After the backlight beam enters the first liquid crystal panel 10, it is transmitted through the liquid crystal layer 103 under the action of the electric field to achieve display. That is to say, the light output brightness of each detection zone 110 in the first liquid crystal panel 10 is determined by the grayscale voltage of multiple display sub-pixels 130 in the detection zone 110 and the light output brightness of multiple backlight zones 210 in the detection zone 110. Therefore, after determining the zone to be adjusted 1101 and the preset brightness, the grayscale voltage received by at least one display sub-pixel 130 in the zone to be adjusted 1101 can be adjusted by the adjustment module to reduce the transmittance of the zone to be adjusted 1101, so that the light output brightness of the zone to be adjusted 1101 is less than or equal to the preset brightness. The brightness can be set; or the brightness of the backlight partition 210 in the adjustable partition 1101 can be adjusted to make the output brightness of the adjustable partition 1101 less than or equal to the preset brightness; or the gray level voltage received by at least one display sub-pixel 130 in the adjustable partition 1101 and the brightness of the backlight partition 210 in the adjustable partition 1101 can be adjusted simultaneously to make the output brightness of the adjustable partition 1101 less than or equal to the preset brightness. In this way, by reducing the output brightness of the adjustable partition 1101, the light leakage of the adjustable partition 1101 is reduced, and the difference between the output brightness of the adjustable partition 1101 and the output brightness of other detection partitions 110 is reduced, thereby improving the brightness uniformity of the display device at low gray levels and improving the display effect of the display device.

[0044] It should be noted that the area with significant changes in emitted light brightness within the display area AA is designated as the detection area AB. In the display device, the detection area AB includes the area to be adjusted, partition 1101.

[0045] In one implementation, the output brightness of the partition 1101 can be adjusted to be less than or equal to a preset brightness by adjusting the grayscale voltage received by at least one display sub-pixel 130 in the partition 1101 to be adjusted. Figure 5 This is a curve showing the transmittance of a display sub-pixel versus grayscale voltage, provided in an embodiment of the present invention. See [link / reference]. Figures 1-5 The adjustment module is configured to adjust the grayscale voltage received by the display sub-pixel 130 according to a first relational expression. The first relational expression satisfies:

[0046]

[0047] Where T(V1) is the transmittance of display sub-pixel 130 when the grayscale voltage is V1 after adjustment, and T(V0) is the transmittance of display sub-pixel 130 when the grayscale voltage is V0 before adjustment, L Min L represents the minimum output brightness among multiple detection zones 110, L represents the output brightness of the zone 1101 to be adjusted before adjustment, and N represents the specification parameter.

[0048] As an example, this embodiment of the invention further explains the first relationship. First, the emitted light brightness of multiple detection zones 110 in the detection area AB is obtained. Then, the emitted light brightness of the multiple detection zones 110 is fitted with their positions in the detection area AB to form a first curve relationship. To ensure the accuracy of the obtained results, the first curve relationship can be obtained from multiple display devices. The emitted light brightness of the detection zones at corresponding positions in the multiple first curve relationships is averaged and fitted to form a second curve relationship. Then, the minimum emitted light brightness L among the multiple detection zones 110 can be obtained based on the second curve relationship. Min Then, the grayscale voltage V0 of the display sub-pixel 130 before adjustment is obtained. Based on the curve of the transmittance of the display sub-pixel versus the grayscale voltage and the grayscale voltage V0 of the display sub-pixel 130 before adjustment, the transmittance T(V0) of the display sub-pixel 130 before adjustment with a grayscale voltage of V0 is obtained.

[0049] It should be noted that the above embodiments are merely exemplary examples of using the first curve relationship and the second curve relationship to obtain the minimum emitted light intensity L among multiple detection zones 110. Min However, this is not a limitation. In other embodiments, the minimum emitted brightness L among the multiple detection zones 110 can be obtained by other means. Min .

[0050] Furthermore, the specification parameter N is determined according to different specifications. For example, when the uniformity of the display device is required to be 65%, the minimum output brightness L among the multiple detection zones 110 after adjustment is required. Min (The minimum output brightness among the multiple detection zones 110 remains unchanged before and after adjustment) and the maximum output brightness L of the multiple detection zones 110 after adjustment. Max The ratio is 65%, from which L can be obtained. Max =1.54×L Min Among them, the maximum output brightness L in the multiple detection zones 110 after adjustment MaxThis can be understood as the preset brightness, i.e., N×L Min Therefore, the specification parameter N equals 1.54. Similarly, when the uniformity of the display device is required to be 90%, the minimum output brightness L among the adjusted multiple detection zones 110 is required. Min (The minimum output brightness among the multiple detection zones 110 remains unchanged before and after adjustment) and the maximum output brightness L of the multiple detection zones 110 after adjustment. Max The ratio is 90%, from which L can be obtained. Max =1.1×L Min Among them, the maximum output brightness L in the multiple detection zones 110 after adjustment Max This can be understood as the preset brightness, i.e., N×L Min Therefore, the specification parameter N equals 1.1.

[0051] As shown above, the minimum emitted brightness L among multiple detection zones 110 is obtained. Min The transmittance T(V0) of the display sub-pixel 130 when the grayscale voltage is V0 before adjustment, the specification parameter N, and the light output brightness L of the area to be adjusted 1101 before adjustment are substituted into the first relational formula to obtain the transmittance T(V1) of the display sub-pixel 130 when the grayscale voltage is V1 after adjustment. Then, based on the curve of the transmittance of the display sub-pixel and the grayscale voltage and the transmittance T(V1) of the display sub-pixel 130 when the grayscale voltage is V1 after adjustment, the grayscale voltage V0 of the display sub-pixel 130 after adjustment is obtained. That is, the grayscale voltage received by at least one display sub-pixel 130 in the area to be adjusted 1101 when the light output brightness adjustment value of the area to be adjusted 1101 is less than or equal to the preset brightness is obtained. In this way, the light output brightness of the area to be adjusted 1101 is reduced, so that the difference between the light output brightness of the area to be adjusted 1101 and the light output brightness of other detection areas 110 is reduced, thereby improving the brightness uniformity of the display device at low grayscale.

[0052] It should be noted that, considering the influence of dark spots and other factors during testing, after obtaining the emitted light brightness of multiple detection zones 110 in the detection area AB, the data of the detection zones 110 with the lowest emitted light brightness (10% or 5%, depending on the actual situation) can be removed. This can avoid interference from measurement errors or outliers and improve the adjustment effect. It is understood that the minimum emitted light brightness L among the multiple detection zones 110 mentioned above... Min To remove the lowest output brightness from multiple detector zones 110, the minimum output brightness is determined after detector zone 110. Minimum output brightness L Min The minimum emitted light intensity of the multiple detection zones 110 can be calculated after removing the multiple detection zones 110 with the lowest emitted light intensity. In another embodiment, Figure 6This is an enlarged schematic diagram of another detection zone provided in an embodiment of the present invention, such as... Figure 6 As shown, the display sub-pixel 130 includes a green sub-pixel 1301, the light emitted by the green sub-pixel 1301 is green light, and the adjustment module is configured to adjust the grayscale voltage received by at least one green sub-pixel 1301 in the adjustment partition 1101 to control the brightness of at least one green sub-pixel 1301 without light emission.

[0053] The display sub-pixel 130 includes a green sub-pixel 1301, wherein the light emission brightness of the green sub-pixel 1301 accounts for a large proportion of the total light emission brightness of the display sub-pixel 130. In other words, the adjustment zone 1101 includes multiple display sub-pixels 130, and among the multiple display sub-pixels 130, the light emission brightness of the green sub-pixel 1301 accounts for a large proportion. Therefore, by adjusting the grayscale voltage received by at least one green sub-pixel 1301 in the adjustment zone 1101, at least one green sub-pixel 1301 can be controlled to have no light emission brightness, thereby reducing the transmittance of green light in the adjustment zone 1101, and thus reducing the light emission brightness of the adjustment zone 1101, so that the light emission brightness of the adjustment zone 1101 is less than or equal to a preset brightness.

[0054] Specifically, the detection area AB includes multiple detection zones 110, each of which can represent a brightness point. The emitted brightness of each detection zone 110 is recorded to form the emitted brightness distribution of the detection area AB. Then, based on the emitted brightness distribution, the minimum emitted brightness L among the multiple detection zones 110 is obtained. Min And obtain the preset brightness according to the specification parameter N, i.e., N×L Min Then, based on a preset brightness, a region 1101 to be adjusted is determined among multiple detection regions 110. Based on the relationship between the emitted brightness of the region 1101 to be adjusted and the preset brightness, the number of green sub-pixels 1301 with no emitted brightness in the region 1101 to be adjusted is adjusted to reduce the transmittance of green light in the region 1101 to be adjusted, thereby reducing the emitted brightness of the region 1101 to be adjusted. For example, if the specification parameter N is 1.54 and the emitted brightness of the region 1101 to be adjusted is 1.6L... Min The preset brightness is 1.54L. MinThe ratio of the preset brightness to the emitted brightness of the zone to be adjusted 1101 is 96.25%, therefore the emitted brightness of the zone to be adjusted 1101 needs to be reduced by 3.75%. Assuming that the emitted light of the green sub-pixel 1301 in the zone to be adjusted accounts for 70% of the emitted brightness of the display sub-pixel 130, and the number of display sub-pixels 130 is 27×12, then the emitted brightness of the green sub-pixel 1301 needs to be reduced by 3.75% / 70% = 5.36%, that is, 5.36% × 27 × 12 = 18 green sub-pixels 1301 need to be adjusted to have no emitted brightness to reduce the transmittance of green light in the zone to be adjusted 1101, thereby reducing the emitted brightness of the zone to be adjusted 1101. This reduces the difference between the emitted brightness of the zone to be adjusted 1101 and the emitted brightness of other detection zones 110, improves the brightness uniformity of the display device at low gray levels, and improves the display effect of the display device.

[0055] Optional, see below Figure 6 The multiple display sub-pixels 130 also include red sub-pixels 1302 and blue sub-pixels 1303. The red sub-pixels 1302 emit red light, and the blue sub-pixels 1303 emit blue light. In the detection zone 110, the red sub-pixels 1302, green sub-pixels 1301, and blue sub-pixels 1303 are arranged along a first direction X, multiple red sub-pixels 1302 are arranged along a second direction Y, multiple green sub-pixels 1302 are arranged along a second direction Y, and multiple blue sub-pixels 1303 are arranged along a second direction Y. The first direction X and the second direction Y intersect. Green sub-pixels 1301 with no light emission are denoted as non-emitting green sub-pixels 1301a, and green sub-pixels 1301 with light emission are denoted as emitting green sub-pixels 1301b. Along the first direction X, there is at least one emitting green sub-pixel 1301b between two adjacent non-emitting green sub-pixels 1301a. Along the second direction Y, there is at least one emitting green sub-pixel 1301b between two adjacent non-emitting green sub-pixels 1301a.

[0056] The display sub-pixel 130 also includes a red sub-pixel 1302 and a blue sub-pixel 1303. The brightness of the red sub-pixel 1302 and the blue sub-pixel 1303 accounts for a small proportion of the brightness of the white screen. Specifically, the area to be adjusted 1101 includes multiple display sub-pixels 130, which are divided into multiple green sub-pixels 1301, multiple red sub-pixels 1302, and multiple blue sub-pixels 1303. The red sub-pixels 1302, green sub-pixels 1301, and blue sub-pixels 1303 are evenly spaced along the first direction X. The multiple red sub-pixels 1302 are arranged along the second direction Y, the multiple green sub-pixels 1302 are arranged along the second direction Y, and the multiple blue sub-pixels 1303 are arranged along the second direction Y. In this system, the number of green sub-pixels 1301, red sub-pixels 1302, and blue sub-pixels 1303 are equal. The light output brightness of green sub-pixels 1301 accounts for a larger proportion of the light output brightness of the area to be adjusted 1101, while the light output brightness of red sub-pixels 1302 or blue sub-pixels 1303 accounts for a smaller proportion of the light output brightness of the area to be adjusted 1101. Therefore, controlling the light output brightness of the area to be adjusted 1101 to be reduced by eliminating the light output brightness of one green sub-pixel 1301 is equivalent to controlling the light output brightness of the area to be adjusted 1101 to be reduced by eliminating the light output brightness of multiple red sub-pixels 1302 or blue sub-pixels 1303. Thus, by controlling the light output brightness of the area to be adjusted 1101 to be reduced by eliminating the light output brightness of green sub-pixels 1301, the number of display sub-pixels 130 that can be controlled can be reduced. Among them, the green sub-pixel 1301 with no light emission is denoted as non-emitting green sub-pixel 1301a, and the green sub-pixel 1301 with light emission is denoted as emitting green sub-pixel 1301b. Furthermore, by adjusting the proportion of non-emitting green sub-pixels 1301a to green sub-pixels 1301, the degree of adjustment of the light emission brightness of the area to be adjusted 1101 can be controlled. In other words, by adjusting the number of non-emitting green sub-pixels 1301a, the transmittance of green light in the area to be adjusted 1101 is reduced, thereby reducing the light emission brightness of the area to be adjusted 1101. This reduces the difference in light emission brightness between the area to be adjusted 1101 and other detection areas 110, improves the brightness uniformity of the display device at low gray levels, and enhances the display effect of the display device.

[0057] Furthermore, along the first direction X, there is at least one light-emitting green sub-pixel 1301b between two adjacent non-light-emitting green sub-pixels 1301a, and along the second direction Y, there is at least one light-emitting green sub-pixel 1301b between two adjacent non-light-emitting green sub-pixels 131a. That is, the non-light-emitting green sub-pixels 1301a and the light-emitting green sub-pixels 1301b are arranged alternately, which can make the brightness uniformity in the adjusted partition 1101 better.

[0058] Optionally, based on the above embodiments, see also... Figure 6 Multiple light-emitting green sub-pixels 1301a are arranged along the first direction X to form a light-emitting green sub-pixel row 1301A, and multiple light-emitting green sub-pixel rows 1301A are repeatedly arranged along the second direction Y.

[0059] Specifically, such as Figure 6 As shown, along the first direction X, the row 1301A of non-emitting green sub-pixels includes multiple non-emitting green sub-pixels 1301a and multiple emitting green sub-pixels 1301b. At least one emitting green sub-pixel 1301b is included between two adjacent non-emitting green sub-pixels 1301a, so that the non-emitting green sub-pixels 1301a are arranged at intervals. Furthermore, along the first direction X, the area to be adjusted 1101 also includes a row 1301B of emitting green sub-pixels. The green sub-pixels 1301 in the emitting green sub-pixel row 1301B only include emitting green sub-pixels 1301b. Along the second direction Y, the rows 1301A and emitting green sub-pixels 1301B are evenly spaced, and the multiple rows 1301A of non-emitting green sub-pixels are aligned, so that the multiple rows 1301A of non-emitting green sub-pixels are repeatedly arranged along the second direction Y, thereby improving the brightness uniformity within the adjusted area 1101.

[0060] In yet another embodiment, Figure 7 This is an enlarged schematic diagram of another detection zone provided in an embodiment of the present invention. See also... Figure 7 Multiple non-emitting green sub-pixels 1301a are arranged along the first direction X to form a row of non-emitting green sub-pixels 1301A, and two adjacent rows of non-emitting green sub-pixels 1301A are staggered along the second direction Y.

[0061] Specifically, such as Figure 7As shown, along the first direction X, the row 1301A of non-emitting green sub-pixels includes a plurality of non-emitting green sub-pixels 1301a and a plurality of emitting green sub-pixels 1301b, and at least one emitting green sub-pixel 1301b is included between two adjacent non-emitting green sub-pixels 1301a, so that the non-emitting green sub-pixels 1301a are arranged at intervals. Furthermore, along the first direction X, the adjustment zone 1101 also includes a row of light-emitting green sub-pixels 1301B. The green sub-pixels 1301 in the row of light-emitting green sub-pixels 1301B only include light-emitting green sub-pixels 1301b. Along the second direction Y, the rows of non-light-emitting green sub-pixels 1301A and the row of light-emitting green sub-pixels 1301B are evenly spaced, and the non-light-emitting green sub-pixels 1301a in the multiple rows of non-light-emitting green sub-pixels 1301A are staggered so that adjacent rows of non-light-emitting green sub-pixels 1301A are staggered along the second direction Y. As a result, the multiple non-light-emitting green sub-pixels 1301a are more evenly distributed along the first direction X and the second direction Y. Compared with the multiple non-light-emitting green sub-pixel rows 1301A being repeatedly arranged along the second direction Y, the brightness uniformity in the adjusted zone 1101 is better. It should be noted that the above descriptions all use the example of adjusting the grayscale voltage received by at least one display sub-pixel 130 in the adjustable partition 1101 to adjust the light output brightness of the adjustable partition 1101 to be less than or equal to the preset brightness. The following describes how to adjust the light output brightness of at least one backlight partition 210 in the adjustable partition 1101 to adjust the light output brightness of the adjustable partition 1101.

[0062] For example, Figure 8 yes Figure 2 Another cross-sectional view along the AA' direction. Figure 9 This is a top view schematic diagram of another backlight module provided in an embodiment of the present invention. Figure 9 The image shows a portion of the backlight module, but not all of it. Figure 1 , Figure 2 , Figure 8 and Figure 9 The backlight module 20 includes a backlight 220 and a second liquid crystal panel 230. The second liquid crystal panel 230 includes a plurality of dimming sub-pixels 2210, and the backlight partition 210 includes at least one dimming sub-pixel 2210. The adjustment module 300 is configured to adjust the grayscale voltage received by at least one dimming sub-pixel 2210 in the partition 1101 to adjust the backlight brightness of the backlight partition 210.

[0063] Specifically, the second liquid crystal panel 230 can be a monochrome panel. The arrangement of monochrome panels and color panels is roughly the same, and will not be described in detail here. Unlike the color panel, the monochrome panel does not have a black matrix in its color resist layer. Therefore, after the backlight beam provided by the backlight 220 enters the second liquid crystal panel 230, under the action of the electric field, it is transmitted through the liquid crystal layer of the second liquid crystal panel 230 and through the color resist blocks of different colors in the second liquid crystal panel 230, and finally mixes to emit monochrome light, providing a backlight beam for the first liquid crystal panel 10. The backlight module 20 includes multiple backlight zones 210, and the vertical projection of the backlight zones 210 on the first substrate 120 is located within the vertical projection of the detection zone 110 on the first substrate 120. A detection zone 110 can correspond to at least one backlight zone 210. The second liquid crystal panel 230 includes a plurality of dimming sub-pixels 2210. Each backlight zone 210 includes at least one dimming sub-pixel 2210. In addition, a detection zone 110 also includes a plurality of display sub-pixels 130. Thus, a dimming sub-pixel 2210 can correspond to a plurality of display sub-pixels 130. That is, the orthographic projection of the display sub-pixel 130 on the first substrate 120 is located within the orthographic projection of the dimming sub-pixel 2210 on the first substrate 120. By adjusting the grayscale voltage received by at least one dimming sub-pixel 2210 in the zone to be adjusted 1101, the rotation angle of the liquid crystal molecules in the second liquid crystal panel 230 is changed, the transmittance of the dimming sub-pixel 2210 is reduced, and the luminous brightness of the backlight zone 210 is reduced, thereby adjusting the luminous brightness of the zone to be adjusted 1101 to be less than or equal to a preset brightness. In this embodiment, the grayscale voltage received by the display sub-pixel 130 can be adjusted, or the grayscale voltage received by the display sub-pixel 130 can be left unadjusted.

[0064] It should be noted that, Figure 8 and Figure 9 The illustration is merely illustrative of one dimming sub-pixel 2210 corresponding to multiple display sub-pixels 130, but it is not a limitation. In other embodiments, one dimming sub-pixel 2210 may correspond to one display sub-pixel 130, or one display sub-pixel 130 may correspond to multiple dimming sub-pixels 2210.

[0065] In one embodiment, Figure 10 This is a curve showing the transmittance of a modulated sub-pixel versus its grayscale voltage, provided in an embodiment of the present invention. Figure 11 This is an example of the light output brightness distribution in the detection area provided by an embodiment of the present invention. See [link / reference]. Figure 1 , Figure 9 , Figure 10 and Figure 11 The adjustment module 300 is configured to adjust the grayscale voltage received by the dimming sub-pixel 2210 according to a second relational expression, which satisfies:

[0066]

[0067] Where K(V3) is the transmittance of the dimming sub-pixel 2210 when the grayscale voltage is V3 after adjustment, K(V2) is the transmittance of the dimming sub-pixel 2210 when the grayscale voltage is V3 before adjustment, and L Min L represents the minimum emitted light intensity among multiple detection zones 110, L represents the emitted light intensity of the zone 1101 to be adjusted before adjustment, and N represents the specification parameter. As an example, this embodiment of the invention further explains the second relationship. First, as... Figure 11 As shown, the detection area AB includes multiple detection zones 110, which are arranged in an array. Each detection zone 110 can be labeled according to a set sorting rule, and the emitted light brightness of each detection zone 110 can be obtained. The emitted light brightness of each detection zone 110 is recorded in correspondence with its label, forming the emitted light brightness distribution of the detection area AB. Then, based on the emitted light brightness distribution, the minimum emitted light brightness L among the multiple detection zones 110 can be obtained. Min Then, the grayscale voltage V2 of the dimming sub-pixel 2210 before adjustment is obtained. Based on the curve of the transmittance of the dimming sub-pixel versus the grayscale voltage and the grayscale voltage V2 of the dimming sub-pixel 2210 before adjustment, the transmittance K(V2) of the dimming sub-pixel 2210 before adjustment with a grayscale voltage of V2 is obtained.

[0068] As shown above, the minimum emitted brightness L among multiple detection zones 110 is obtained. Min Substituting the transmittance K(V2) of the dimming sub-pixel 2210 at a grayscale voltage of V2 before adjustment, the specification parameter N, and the output brightness L of the area to be adjusted 1101 before adjustment into the second relational expression, we obtain the transmittance K(V3) of the dimming sub-pixel 2210 at a grayscale voltage of V3 after adjustment. Then, based on the curve of transmittance versus grayscale voltage of the dimming sub-pixel and the transmittance K(V3) of the dimming sub-pixel 2210 at a grayscale voltage of V3 after adjustment, we obtain the transmittance K(V3) of the dimming sub-pixel 221. The adjusted grayscale voltage V3 is obtained when the brightness adjustment value of the light output of the area to be adjusted 1101 is less than or equal to the preset brightness. This is the grayscale voltage received by at least one dimming sub-pixel 2210 in the area to be adjusted 1101, thereby reducing the transmittance of the dimming sub-pixel 2210 and reducing the light emission brightness of the backlight area 210. This reduces the difference between the light output brightness of the area to be adjusted 1101 and the light output brightness of other detection areas 110, thereby improving the brightness uniformity of the display device at low grayscale levels.

[0069] In one embodiment, Figure 12 This is a top view schematic diagram of another backlight module provided in an embodiment of the present invention. Figure 12 The image shows a portion of the backlight module, but not all of it. For example... Figure 1, Figure 8 and Figure 12 As shown, the adjustment module 300 is configured to control the brightness of at least one dimming sub-pixel 2210 in the adjustment zone 1101 without light emission.

[0070] Specifically, the luminance of the backlight beam provided by the backlight partition 210 is determined by the grayscale voltage received by the multiple dimming sub-pixels 2210 in the backlight partition 210 and the luminance of the backlight source 220. When the luminance of the backlight source 220 remains constant, in addition to adjusting the grayscale voltage received by at least one dimming sub-pixel 2210 in the partition to be adjusted 1101 to adjust the transmittance of the backlight partition 210, it is also possible to control the non-emitting brightness of at least one dimming sub-pixel 2210 in the partition to be adjusted 1101 to reduce the overall transmittance of the backlight partition 210, thereby reducing the luminance of the backlight partition 210. This reduces the difference in luminance between the emitting brightness of the partition to be adjusted 1101 and the emitting brightness of other detection partitions 110, improving the brightness uniformity of the display device at low grayscale levels.

[0071] It should be noted that, Figure 13 This is a schematic diagram of the voltage waveform of a display sub-pixel or a dimming sub-pixel provided in an embodiment of the present invention, such as... Figure 7 , Figure 11 and Figure 13 As shown, when the light output brightness of the adjustable sub-pixel 1101 is reduced by adjusting the grayscale voltage received by at least one display sub-pixel 130 in the adjustable sub-sub ...

[0072] The above description uses the backlight module 20, which includes a second liquid crystal panel 230 and a backlight source 220, as an example. In other embodiments, the backlight module 20 may also include only the backlight source 220. Figure 14 This is a top view schematic diagram of another backlight module provided in an embodiment of the present invention. Figure 14 The image shows a portion of the backlight module, but not all of it. For example... Figure 1 , Figure 3 and Figure 14 As shown, the backlight module 20 includes a backlight source 220, and the backlight source 220 includes at least one light-emitting diode 2220 in the backlight partition 210. The adjustment module 300 is configured to adjust the luminous brightness of at least one light-emitting diode 2220 in the partition 1101 to be adjusted, so as to adjust the luminous brightness of the backlight partition 210.

[0073] Specifically, when the backlight module 20 includes only the backlight source 220, the luminous intensity of the backlight module 20 is determined by the luminous intensity of the backlight source 220. For example, the backlight source 220 includes an array of light-emitting diodes 2220, and each backlight section 210 includes at least one light-emitting diode 2220. Figure 12 The example described uses one backlight zone 210 corresponding to four light-emitting diodes, but is not limited to this. The luminous brightness of each backlight zone 210 is determined by the luminous brightness of multiple light-emitting diodes 2220 located within the backlight zone 210. By adjusting the luminous brightness of at least one light-emitting diode 2220 in the zone to be adjusted 1101, the luminous brightness of the backlight zone 210 is reduced, so that the light output brightness of the zone to be adjusted 1101 is less than or equal to a preset brightness, thereby reducing light leakage in the zone to be adjusted 1101. This reduces the difference between the light output brightness of the zone to be adjusted 1101 and the light output brightness of other detection zones 110, improving the brightness uniformity of the display device at low gray levels and enhancing the display effect of the display device.

[0074] Optionally, based on the above embodiments, see also... Figure 1 The first liquid crystal panel 10 includes a display area AA and a non-display area BB. The non-display area BB is located outside the display area AA. The display device also includes a driver chip 40, which is bonded to the non-display area BB of the first liquid crystal panel 10. Along the second direction Y, the driver chip 40 overlaps with the detection area AB.

[0075] Specifically, such as Figure 1 As shown, the display area AA includes two detection areas AB, namely the first detection area AB1 and the second detection area AB2. The first detection area AB1 and the second detection area AB2 are located in the area of ​​the display area AA adjacent to the non-display area BB. The first detection area AB1 and the second detection area AB2 are arranged along the first direction X. The driving chip 40 is bonded to the non-display area BB of the first liquid crystal panel 10. The driving chip 40 includes a first driving chip 410 and a second driving chip 420. Along the second direction Y, the first driving chip 410 overlaps with the first detection area AB1, and the second driving chip 420 overlaps with the second detection area AB2. It is understandable that when the driver chip is directly bonded to the glass, the high temperature will cause a temperature difference between the upper and lower surfaces of the glass, resulting in local deformation of the glass. Consequently, the path difference of light passing through the deformed glass will change, causing the brightness of the light emitted at that location to be too high. This leads to light leakage in the display device at low gray levels. In other words, the formation of the detection area AB is related to the driver chip 40. Therefore, the number of detection areas AB is the same as the number of driver chips 40, and the position of the detection area AB corresponds to the position of the driver chip 40.

[0076] Optional, see below Figure 1 Along the second direction Y, the distance D between the edge of the driving chip 40 near the detection area AB and the edge of the detection area AB near the driving chip 40 is greater than 4mm and less than 6mm. Specifically, the detection area AB is the region in the display area AA where the emitted light brightness varies greatly. This large variation in emitted light brightness in the detection area AB is caused by the high-temperature bonding of the driving chip 40. Therefore, the position of the detection area AB is related to the position of the driving chip 40. That is, along the second direction Y, the driving chip 40 overlaps with the detection area AB, and the distance D between the edge of the driving chip 40 near the detection area AB and the edge of the detection area AB near the driving chip 40 is greater than 4mm and less than 6mm. If the distance D between the edge of the driving chip 40 near the detection area AB and the edge of the detection area AB near the driving chip 40 is less than 4mm or greater than 6mm, it will cause the detection area AB to be too far away from the driving chip 40, resulting in a large error in the final measurement result and affecting the improvement effect of brightness uniformity at low gray levels. Furthermore, the size of the detection area AB can be set according to the brightness distribution of the display device. For example, along the first direction X, the length of the detection area AB can be 50mm, and along the second direction Y, the width of the detection area AB can be 12.5mm. By setting the size of the detection area AB within a suitable range, the area to be adjusted 1101 can be quickly determined. It should be noted that the above is merely an example illustrating the size of the detection area AB, but it is not intended to limit the scope. Those skilled in the art can set it as needed. Optionally, see [link to documentation]. Figure 1 Along the first direction X, the minimum distance between the driving chip 40 and the edge of the display area AA is H1, and the minimum distance between the detection area AB and the edge of the display area AA is H2. -5mm≤(H1-H2)≤5mm. When bonding the driving chip 40, high temperature causes local deformation of the glass, which in turn causes some of the detection zones 110 to have excessively high light output brightness. In this embodiment, -5mm≤(H1-H2)≤5mm is set so that the distance between the edges of the detection area AB and the display area AA along the first direction X is comparable to the distance between the edges of the driving chip 40 and the display area AA along the first direction X. This places the side of the detection area AB near the edge of the display area AA and the side of the driving chip 40 near the edge of the display area AA in similar positions. Thus, the position of the detection area AB along the first direction X is set according to the position of the driving chip 40, improving the rationality of the setting of the detection area AB and enhancing the brightness uniformity of the display device at low gray levels.

[0077] Furthermore, -3mm ≤ (H1-H2) ≤ 3mm is used to further improve the brightness uniformity of the display device at low gray levels. As an example, H1 = 64.79mm and H2 = 67.2mm.

[0078] Based on the same inventive concept, embodiments of the present invention also provide a driving method for a display device, used to drive the display device mentioned in the above embodiments. Figure 13 This is a flowchart of a driving method for a display device provided in an embodiment of the present invention, such as... Figure 13 As shown, the driving method of the display device includes:

[0079] S110. Obtain the output brightness of each detection zone in the detection area.

[0080] Specifically, the detection area is the region in the display area where the emitted light brightness varies greatly. The detection area can be divided into multiple detection partitions, which are arranged in an array. Each detection partition can represent a brightness point, and multiple brightness points form the emitted light brightness distribution of the detection area. The emitted light brightness of each detection partition in the detection area can then be obtained by a photometer.

[0081] S120. Based on the light output brightness of each detection zone, obtain at least one zone to be adjusted.

[0082] The detection area can be divided into multiple detection zones. Among these multiple detection zones, the detection zone with a light output brightness greater than the preset brightness is recorded as the zone to be adjusted. Specifically, when binding the driver chip, high temperature causes local deformation of the glass, which in turn causes some detection zones to have excessive light output brightness. These detection zones with excessive light output brightness are recorded as the zones to be adjusted. Excessive light output brightness in the zones to be adjusted will cause light leakage, affecting the brightness uniformity of the display device at low gray levels.

[0083] S130, Adjust the grayscale voltage received by at least one display sub-pixel in the area to be adjusted, and / or adjust the luminous brightness of at least one backlight area in the area to be adjusted, thereby adjusting the luminous brightness of the area to be adjusted to be less than or equal to a preset brightness.

[0084] Specifically, the light emission brightness of each detection zone in the first liquid crystal panel is determined by the grayscale voltage of multiple display sub-pixels in the detection zone and the luminous brightness of multiple backlight zones in the detection zone. After determining the zone to be adjusted and the preset brightness, the grayscale voltage received by at least one display sub-pixel in the zone to be adjusted can be adjusted by the adjustment module to reduce the transmittance of the zone to be adjusted, so that the light emission brightness of the zone to be adjusted is less than or equal to the preset brightness. In this embodiment, a zoned backlight module or a non-zoned backlight module can be used; or the light emission brightness of at least one backlight zone in the zone to be adjusted can be adjusted to make the light emission brightness of the zone to be adjusted less than the preset brightness. Alternatively, the brightness can be equal to a preset brightness. In this embodiment, the grayscale voltage received by the display sub-pixel can be adjusted, or the grayscale voltage received by the display sub-pixel can be left unchanged; or the grayscale voltage received by at least one display sub-pixel in the area to be adjusted, as well as the luminous brightness of at least one backlight area in the area to be adjusted, can be adjusted simultaneously to make the light output brightness of the area to be adjusted less than or equal to the preset brightness. In this way, by reducing the light output brightness of the area to be adjusted, the light leakage of the area to be adjusted is reduced, and the difference between the light output brightness of the area to be adjusted and the light output brightness of other detection areas is reduced, thereby improving the brightness uniformity of the display device at low grayscale levels and improving the display effect of the display device.

[0085] In summary, the driving method of this invention obtains the light emission brightness of each detection zone in the detection area, and obtains at least one zone to be adjusted based on the light emission brightness of each detection zone. Then, it adjusts the grayscale voltage received by at least one display sub-pixel in the zone to be adjusted, and / or adjusts the light emission brightness of at least one backlight zone in the zone to be adjusted, thereby adjusting the light emission brightness of the zone to be adjusted to be less than or equal to a preset brightness. In this way, the light emission brightness of the zone to be adjusted is adjusted, the light leakage of the zone to be adjusted is reduced, and the difference between the light emission brightness of the zone to be adjusted and the light emission brightness of other detection zones is reduced, thereby improving the brightness uniformity of the display device at low grayscale.

[0086] Optional, Figure 14 This is a flowchart of another display device driving method provided in an embodiment of the present invention, such as... Figure 14 As shown, the driving method includes:

[0087] S210. Obtain the output brightness of each detection zone in the detection area.

[0088] S220. Based on the output brightness of each detection zone, obtain the horizontal brightness distribution curve when the position of the detection zone changes along the first direction, and the vertical brightness distribution curve when the position of the detection zone changes along the second direction. Based on the horizontal brightness distribution curve and / or the vertical brightness distribution curve, obtain the minimum output brightness among multiple detection zones, and based on the minimum output brightness and specification parameters, obtain the zone to be adjusted.

[0089] Specifically, firstly, the emitted light brightness of multiple detection zones within the detection area is obtained. Then, the emitted light brightness of these zones is fitted to their positions within the detection area to form a first curve relationship. This involves obtaining the horizontal brightness distribution curve as the detection area changes position along a first direction and the vertical brightness distribution curve as the detection area changes position along a second direction. The first and second directions intersect. The first curve relationship includes both the horizontal and vertical brightness distribution curves. To ensure the accuracy of the results, the first curve relationship can be obtained from multiple display devices. The emitted light brightness of the detection zones at corresponding positions within these multiple first curve relationships is then averaged and fitted to form a second curve relationship. The second curve relationship includes the average horizontal brightness distribution curve as the multiple display devices change position along the first direction and the average vertical brightness distribution curve as the devices change position along the second direction. Therefore, the minimum emitted light brightness among the multiple detection zones can be obtained based on the second curve relationship.

[0090] The specification parameter N is determined according to different specifications. For example, when the uniformity of the display device is required to be 65%, the minimum output brightness L among the multiple detection zones after adjustment is required. Min (The minimum output brightness among the multiple detection zones 110 remains unchanged before and after adjustment) and the maximum output brightness L of the multiple detection zones after adjustment. Max The ratio is 65%, from which L can be obtained. Max =1.54×L Min Among them, the maximum output brightness L in the adjusted multiple detection zones Max This can be understood as the preset brightness, i.e., N×L Min Therefore, the specification parameter N can be obtained as 1.54. After obtaining the specification parameter N, the specification parameter N and the minimum output brightness L in multiple detection zones are then compared. Min The product of these values ​​is the preset brightness. Then, the detection zones with light output brightness greater than the preset brightness are selected from multiple detection zones and recorded as the zones to be adjusted.

[0091] S230, Adjust the grayscale voltage received by at least one display sub-pixel in the area to be adjusted, and / or adjust the luminous brightness of at least one backlight area in the area to be adjusted, thereby adjusting the luminous brightness of the area to be adjusted to be less than or equal to a preset brightness.

[0092] In summary, the embodiments of the present invention obtain the minimum output brightness in multiple detection zones by using horizontal brightness distribution curves and / or vertical brightness distribution curves, which can improve the accuracy of obtaining the minimum output brightness and thus ensure the accuracy of subsequent adjustments.

[0093] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display device, characterized in that, It includes a first liquid crystal panel and a backlight module, wherein the backlight module provides a backlight beam for the first liquid crystal panel; The first liquid crystal panel includes a display area, the display area includes a detection area, and the detection area includes multiple detection zones; the first liquid crystal panel includes a first substrate and multiple display sub-pixels, the display sub-pixels being located on one side of the first substrate; the detection zones include multiple display sub-pixels; The backlight module includes multiple backlight zones, and the vertical projection of the backlight zones onto the first substrate is located within the vertical projection of the detection zones onto the first substrate. At least one of the plurality of detection zones is the zone to be adjusted; The adjustment module is configured to adjust the grayscale voltage received by at least one of the display sub-pixels in the adjustment zone, and / or adjust the luminous brightness of at least one of the backlight zones in the adjustment zone, thereby adjusting the luminous brightness of the adjustment zone to be less than or equal to a preset brightness. The adjustment module is configured to adjust the grayscale voltage received by the display sub-pixel according to a first relational formula; The first relation satisfies: in, The grayscale voltage of the display sub-pixel after adjustment is Transmittance at time The grayscale voltage of the display sub-pixel before adjustment is Transmittance at time L represents the minimum output brightness among the multiple detection zones, L represents the output brightness of the zone to be adjusted before adjustment, and N represents the specification parameter.

2. The display device according to claim 1, characterized in that, The display sub-pixel includes a green sub-pixel, and the light emitted by the green sub-pixel is green light; The adjustment module is configured to adjust the grayscale voltage received by at least one of the green sub-pixels in the partition to be adjusted, so as to control the brightness of at least one of the green sub-pixels without light emission.

3. The display device according to claim 2, characterized in that, The plurality of display sub-pixels also include red sub-pixels and blue sub-pixels, wherein the red sub-pixels emit red light and the blue sub-pixels emit blue light; In the detection partition, the red sub-pixels, the green sub-pixels, and the blue sub-pixels are arranged along a first direction, a plurality of red sub-pixels are arranged along a second direction, a plurality of green sub-pixels are arranged along the second direction, and a plurality of blue sub-pixels are arranged along the second direction; the first direction and the second direction intersect. The green sub-pixel with no light emission brightness is denoted as the non-emitting green sub-pixel, and the green sub-pixel with light emission brightness is denoted as the emitting green sub-pixel; Along the first direction, there is at least one light-emitting green sub-pixel between two adjacent non-light-emitting green sub-pixels, and along the second direction, there is at least one light-emitting green sub-pixel between two adjacent non-light-emitting green sub-pixels.

4. The display device according to claim 3, characterized in that, Multiple light-emitting green sub-pixels are arranged in a row of light-emitting green sub-pixels along the first direction; Multiple rows of non-emitting green sub-pixels are repeatedly arranged along the second direction.

5. The display device according to claim 3, characterized in that, Multiple light-emitting green sub-pixels are arranged in a row of light-emitting green sub-pixels along the first direction; The adjacent rows of non-emitting green sub-pixels are staggered along the second direction.

6. The display device according to claim 1, characterized in that, The backlight module includes a backlight source and a second liquid crystal panel, the second liquid crystal panel includes a plurality of dimming sub-pixels, and the backlight partition includes at least one of the dimming sub-pixels; The adjustment module is configured to adjust the grayscale voltage received by at least one of the dimming sub-pixels in the area to be adjusted, so as to adjust the luminous brightness of the backlight area.

7. The display device according to claim 6, characterized in that, The adjustment module is configured to adjust the grayscale voltage received by the dimming sub-pixel according to the second relationship; The second relation satisfies: in, The grayscale voltage of the dimming sub-pixel after adjustment is Transmittance at time The grayscale voltage of the dimming sub-pixel before adjustment is Transmittance at time L represents the minimum output brightness among the multiple detection zones, L represents the output brightness of the zone to be adjusted before adjustment, and N represents the specification parameter.

8. The display device according to claim 6, characterized in that, The adjustment module is configured to control the brightness of at least one of the dimming sub-pixels in the partition to be adjusted to be light-free.

9. The display device according to claim 1, characterized in that, The backlight module includes a backlight source, and the backlight source includes at least one light-emitting diode in the backlight partition. The adjustment module is configured to adjust the luminous brightness of at least one of the light-emitting diodes in the area to be adjusted, so as to adjust the luminous brightness of the backlight area.

10. The display device according to claim 1, characterized in that, The first liquid crystal panel includes a non-display area, which is located outside the display area; The display device further includes a driver chip, which is bonded to the non-display area of ​​the first liquid crystal panel, and overlaps with the detection area along the second direction.

11. The display device according to claim 10, characterized in that, Along the second direction, the distance between the edge of the driving chip near the detection area and the edge of the detection area near the driving chip is greater than 4 mm and less than 6 mm.

12. A driving method based on the display device of claim 1, characterized in that, include: Obtain the output brightness of each detection zone in the detection area; Based on the light output brightness of each detection zone, at least one zone to be adjusted is obtained; Adjust the grayscale voltage received by at least one of the display sub-pixels in the area to be adjusted, and / or adjust the luminous brightness of at least one of the backlight areas in the area to be adjusted, thereby adjusting the luminous brightness of the area to be adjusted to be less than or equal to a preset brightness.

13. The driving method according to claim 12, characterized in that, Based on the emitted light brightness of each detection zone, at least one zone to be adjusted is obtained, including: Based on the emitted light brightness of each detection zone, obtain the horizontal brightness distribution curve of the detection zone when its position changes along the first direction, and the vertical brightness distribution curve of the detection zone when its position changes along the second direction; the first direction and the second direction intersect. Based on the horizontal brightness distribution curve and / or the vertical brightness distribution curve, obtain the minimum emitted light brightness among the multiple detection zones; The zone to be adjusted is obtained based on the minimum output brightness and specification parameters.

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