Display device

Abstract

Embodiments of the present application provide a display device. The display device comprises a timing controller, and a display panel and a source driver connected with the timing controller. The display panel comprises a plurality of display pixels, and the plurality of display pixels comprise a dark spot pixel and a to-be-compensated display pixel. The to-be-compensated display pixel is located around the dark spot pixel. The timing controller is configured to receive an original gray scale signal of the to-be-compensated display pixel, and generate a compensation data signal of the to-be-compensated display pixel; wherein a voltage value of the compensation data signal is less than a voltage value of an original data signal corresponding to the original gray scale signal; and send the compensation data signal, so that the source driver drives the to-be-compensated display pixel to emit light according to the compensation data signal. In this way, the voltage value of the data signal of the to-be-compensated display pixel is reduced, so that the display effect of the to-be-compensated display pixel and the display effect of the dark spot pixel are more matched, and thus the overall display quality of the display device is improved.

Description

Technical Field

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

[0002] Display panels typically consist of millions of pixels, each capable of emitting different colors of light, such as red, green, and blue. During the manufacturing process, defects can occur in some pixels, causing them to fail to emit light and become dark spots. When a display panel is in use, these dark spots negatively impact display quality. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display device to improve the problem of dark spots affecting display quality.

[0004] To achieve the above objectives, this application provides a display device. The display device includes a display panel, a source driver, and a timing controller. The display panel includes a plurality of display pixels. The plurality of display pixels includes dark pixels and display pixels to be compensated, with the display pixels to be compensated located around the dark pixels. The source driver is connected to the display panel. The timing controller is connected to the display panel and the source driver. The timing controller is configured to: receive the original grayscale signal of the display pixel to be compensated, and generate a compensation data signal for the display pixel to be compensated; wherein the voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal; and send the compensation data signal, causing the source driver to drive the display pixel to be compensated to emit light according to the compensation data signal.

[0005] In some embodiments of the display device of this application, the timing controller receives the original grayscale signal of the display pixel to be compensated around the dark pixel, generates a compensation data signal of the display pixel to be compensated, and the voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal, thereby reducing the voltage value of the data signal of the display pixel to be compensated, so that the display effect of the display pixel to be compensated matches the display effect of the dark pixel better, thereby improving the overall display quality of the display device. Attached Figure Description

[0006] Figure 1 Schematic diagrams of the display device provided for some embodiments of this application;

[0007] Figure 2 A schematic diagram illustrating the arrangement of multiple display pixels in a display area provided for some embodiments of this application;

[0008] Figure 3 A flowchart illustrating the calculation method for the first to third stimulus values ​​provided in some embodiments of this application;

[0009] Figure 4 A schematic flowchart of a driving method for a display device provided for some embodiments of this application.

[0010] The attached figures are labeled as follows:

[0011] 200. Display device;

[0012] 10. Display panel;

[0013] 10A, Display area; 101A, 101A1, 101A2, 101A3, Display partitions; 102A, Local processing area;

[0014] 100. Display pixel; 101. First display pixel; 102. Second display pixel; 103. Third display pixel; 104. Dark pixel; 105. Bright pixel; 106. Low-brightness pixel; 107. Display pixel to be compensated;

[0015] 110. Pixel unit; 111. First pixel unit; 112. Second pixel unit;

[0016] 20. Source driver;

[0017] 30. Timing controller;

[0018] 40. Gate drive circuit;

[0019] X, the first direction; Y, the second direction. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] Please see Figure 1 and Figure 2 , Figure 1 Schematic diagrams of the display device provided for some embodiments of this application. Figure 2 This is a schematic diagram of the arrangement structure of multiple display pixels in the display area provided for some embodiments of this application.

[0022] like Figure 1 As shown, the display device 200 includes a display panel 10, a source driver 20, and a timing controller 30. The source driver 20 is connected to the display panel 10. The timing controller 30 is connected to both the display panel 10 and the source driver 20.

[0023] The display panel 10 has a display area 10A. The display area 10A of the display panel 10 is provided with a plurality of display pixels 100. Each display pixel 100 may include a light-emitting device.

[0024] Light-emitting devices include any one of liquid crystal display devices, organic light-emitting devices, and inorganic light-emitting devices. Organic light-emitting devices include, but are not limited to, organic light-emitting diodes (OLEDs). Inorganic light-emitting devices include, but are not limited to, any one of micro LEDs and sub-millimeter LEDs.

[0025] For example, each display pixel 100 may include an organic light-emitting device. The organic light-emitting device includes an anode, a cathode, and an organic light-emitting layer located between the anode and the cathode.

[0026] It should be noted that, Figure 2 Multiple organic light-emitting layers of multiple display pixels 100 are illustrated. The shape of the organic light-emitting layers can be selected from at least one of rectangles, circles, ellipses, and polygons. For example, the shape of the organic light-emitting layers is rectangular. The size of each display pixel 100 can be the same or different.

[0027] The display panel 10 may further include a pixel driving circuit for a light-emitting device, which drives the light-emitting device to emit light. The pixel driving circuit may include driving elements such as thin-film transistors (TFTs). In some embodiments, the pixel driving circuit may include, but is not limited to, a 7T1C circuit, a 6T1C circuit, a 5T1C circuit, a 4T1C circuit, a 3T1C circuit, or a 2T1C circuit. T represents a thin-film transistor, and C represents a capacitor. 7T1C represents seven thin-film transistors and one capacitor; other circuits such as 6T1C can be deduced similarly, and will not be elaborated further here.

[0028] In some embodiments, such as Figure 2 As shown, multiple display pixels 100 can constitute multiple pixel units 110. The multiple pixel units 110 are arranged in an array in the display area 10A along a first direction X and a second direction Y. Each pixel unit 110 includes at least two display pixels 100, and the at least two display pixels 100 emit at least two different colors of light respectively.

[0029] In some embodiments, the first direction X is perpendicular to the second direction Y. In other embodiments, the angle between the first direction X and the second direction Y can be an acute angle or an obtuse angle.

[0030] In some embodiments, such as Figure 2As shown, a pixel unit 110 may include a first display pixel 101, a second display pixel 102, and a third display pixel 103, and the first display pixel 101 to the third display pixel 103 are respectively configured to emit three different colors of light. For example, the first display pixel 101 to the third display pixel 103 may be a red pixel, a green pixel, and a blue pixel, respectively, and are respectively configured to emit red light, green light, and blue light.

[0031] In some embodiments, a pixel unit 110 may include two display pixels 100. In other embodiments, a pixel unit 110 may include three or more display pixels 100.

[0032] The display panel 10 also includes multiple signal lines (not shown in the figure), located in the display area 10A. These signal lines include multiple data lines and multiple scan lines. The data lines intersect the scan lines in an insulated manner. A display pixel 100 is connected to a scan line to receive the scan signal transmitted by the scan line. A display pixel 100 is also connected to a data line to receive the data signal transmitted by the data line.

[0033] The source driver 20 is connected to multiple data lines to output their respective data signals to the multiple data lines.

[0034] like Figure 1 As shown, the display device 200 also includes a gate driving circuit 40, which is connected to multiple scan lines to output respective scan signals to each scan line. The gate driving circuit 40 can be integrated onto the display panel 10 or located inside the gate driver. The gate driver is attached to the display panel 10.

[0035] In some embodiments, such as Figure 2 As shown, the display area 10A includes multiple display partitions 101A, which are arranged in an array along a first direction X and a second direction Y. Each display partition 101A is provided with one or more pixel units 110.

[0036] One or more display partitions 101A include a local processing area 102A, which is provided with dark pixel 104.

[0037] It should be noted that during the manufacturing process of the display panel 10, process defects may damage a small number of display pixels 100, preventing current from flowing through them. Therefore, during the manufacturing process, the dark pixel 104 is configured to emit light of a certain color, such as at least one of red, green, and blue light. However, after the display panel is actually manufactured, the dark pixel 104 cannot emit light under the drive of the pixel driving circuit. These few display pixels 100 that cannot emit light are called dark pixels 104.

[0038] It should also be noted that since dark pixel 104 cannot emit light, its original brightness value is 0. Furthermore, multiple dark pixels 104 can be configured to emit light of different colors, or they can be configured to emit light of the same color.

[0039] In some embodiments, at least one of the constituent structures of the dark pixel 104, such as the pixel driving circuit and the organic light-emitting layer, malfunctions. When the pixel driving circuit malfunctions, it may be due to a short circuit or open circuit in the signal line, or it may be due to damage to the thin-film transistor in the pixel driving circuit. When the constituent structures, such as the organic light-emitting layer, malfunction, it may be due to an internal short circuit within the constituent structure, such as a short circuit between the cathode and anode.

[0040] The local processing area 102A also includes display pixels 107 to be compensated, which are located around the dark pixel 104. The display pixels 107 and the dark pixel 104 together define the local processing area 102A. The display pixel 107 to be compensated refers to a display pixel 100 whose pixel feature values, such as data voltage, need to be compensated, and which can emit light normally. This embodiment of the application improves the display abnormality problem caused by the dark pixel 104 by compensating the pixel feature values ​​of the display pixels 107 to be compensated in the local processing area 102A.

[0041] In this embodiment, the timing controller 30 is configured to: receive the original grayscale signal of the display pixel 107 to be compensated, and generate a compensation data signal of the display pixel 107 to be compensated, wherein the voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal; and send the compensation data signal so that the source driver 20 drives the display pixel 107 to emit light according to the compensation data signal.

[0042] In some embodiments of this application, the timing controller 30 receives the original grayscale signal of the display pixel 107 to be compensated and generates its compensation data signal. The voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal of the display pixel 107 to be compensated, thereby reducing the voltage value of the data signal of the display pixel 107 to be compensated. This makes the display effect of the dark pixel 104 more matched with the display effect of the surrounding display pixels 107 to be compensated, thereby improving the overall display quality of the display device 200.

[0043] In some embodiments, the display pixel 107 to be compensated may include one or more display pixels 100 adjacent to the dark pixel 104.

[0044] In some embodiments, such as Figure 2 As shown, the plurality of pixel units 110 include a first pixel unit 111, which includes a dark pixel 104 and at least one display pixel 107 to be compensated. Thus, at least one display pixel 107 to be compensated and the dark pixel 104 are both located in the same pixel unit 110. This reduces the data signal of the display pixel 107 to be compensated, making the display effects of the display pixel 107 to be compensated and the dark pixel 104 in the first pixel unit 111 match, thereby improving the overall display effect of the first pixel unit 111.

[0045] In some embodiments, such as Figure 2 As shown, in the first pixel unit 111, the display pixel 107 to be compensated and the dark pixel 104 can be configured to emit light of different colors. For example, in the first pixel unit 111, the display pixel 107 to be compensated corresponds to the first display pixel 101, and the dark pixel 104 corresponds to the second display pixel 102.

[0046] In other embodiments, in the first pixel unit 111, the display pixel 107 to be compensated and the dark pixel 104 can be configured to emit light of the same color.

[0047] In some embodiments, the plurality of pixel units 110 further include second pixel units 112, each including at least one display pixel 107 to be compensated. In the first direction X and / or the second direction Y, one or more second pixel units 112 are adjacent to the first pixel unit 111. Thus, at least one display pixel 107 to be compensated and the dark pixel 104 are respectively located in adjacent pixel units 110. Reducing the data signal of the display pixel 107 to be compensated reduces the brightness of the second pixel unit 112, making the display effect of the second pixel unit 112 match that of the first pixel unit 111, thereby improving the overall display effect of the first pixel unit 111 and the second pixel unit 112.

[0048] In some embodiments, such as Figure 2 As shown, in the local processing area 102A, along the first direction X, a plurality of second pixel units 112 can be disposed on the opposite side of the first pixel unit 111.

[0049] In some embodiments, in the local processing region 102A, along the first direction X, one or more second pixel units 112 may be disposed on one side of the first pixel unit 111.

[0050] In some embodiments, in the local processing region 102A, along the second direction Y, one or more second pixel units 112 are disposed on one side of the first pixel unit 111; or, in the local processing region 102A, along the second direction Y, one or more second pixel units 112 are disposed on the opposite side of the first pixel unit 111.

[0051] In some embodiments, the compensation data signal is determined based on the compensation grayscale value, which is obtained by converting the compensation brightness value. The compensation brightness value is determined based on the original brightness value of the display pixel 107 to be compensated and the brightness compensation coefficient. The original brightness value is obtained by converting the original grayscale value corresponding to the original grayscale signal. Thus, since the original brightness value of the display pixel 107 to be compensated is attenuated, the brightness of the display pixel 107 to be compensated is reduced, making the brightness of the display pixel 107 to be compensated more closely match the brightness of the dark pixel 104.

[0052] It should be noted that the brightness value and the grayscale value of the grayscale signal can be converted to each other using the formula corresponding to the gamma curve. The gamma curve may include, but is not limited to, the Gamma 2.2 curve. Furthermore, the timing controller 30 stores a grayscale-voltage value mapping dataset, which includes multiple grayscale values ​​and the voltage value of the data signal corresponding to each grayscale value. Therefore, based on the grayscale-voltage value mapping dataset, the conversion between the grayscale value corresponding to the grayscale signal and the voltage value corresponding to the data signal can be realized.

[0053] In some embodiments, the compensated brightness value is equal to the product of the original brightness value of the display pixel 107 to be compensated and the brightness compensation coefficient.

[0054] In some embodiments, the brightness compensation coefficient of the display pixel 107 to be compensated in the local processing area 102A can be calculated from the perspective of brightness, so as to compensate the display pixel 107 from the perspective of brightness and improve the overall display effect of at least one display partition 101A where the dark pixel 104 is located. In this case, the brightness compensation coefficient is greater than 0 and less than 1.

[0055] In some embodiments, at least one display pixel 107 to be compensated corresponds to a first display pixel 101, and a dark pixel 104 corresponds to a second display pixel 102. The brightness compensation coefficient of the first display pixel 101 in the local processing area 102A is determined based on a first brightness ratio coefficient and a second brightness ratio coefficient. The first brightness ratio coefficient represents the brightness ratio of all first display pixels 101 to all second display pixels 102 in at least one display partition 101A. The second brightness ratio coefficient represents the brightness ratio of all first display pixels 101 to all second display pixels 102 in the local processing area 102A.

[0056] It should be noted that "at least one display pixel 107 to be compensated corresponds to the first display pixel 101" means that at least one display pixel 107 to be compensated belongs to the first display pixel 101. Furthermore, "dark pixel 104 corresponds to the second display pixel 102" means that the dark pixel 104 belongs to the second display pixel 102.

[0057] Therefore, when at least one display pixel 107 to be compensated corresponds to the first display pixel 101 and the dark pixel 104 corresponds to the second display pixel 102, the brightness compensation coefficient of the first display pixel 101 is determined based on the brightness ratio of the first display pixel 101 to the second display pixel 102 in the display partition 101A (e.g., display partition 101A1) where the dark pixel 104 is located, and the brightness ratio of the first display pixel 101 to the second display pixel 102 in the local processing area 102A. After compensating the first display pixel 101 in the local processing area 102A based on this brightness compensation coefficient, the brightness ratio of the first display pixel 101 to the second display pixel 102 in the local processing area 102A and the display partition 101A where the dark pixel 104 is located tends to be the same, ensuring that the display effect of the local processing area 102A is similar to the overall display effect of the entire display partition 101A where the dark pixel 104 is located, thereby improving the uniformity of the display effect of at least one display partition 101A where the dark pixel 104 is located.

[0058] In some embodiments, the first brightness matching coefficient is determined based on a first brightness sum and a second brightness sum. The first brightness sum is equal to the sum of the original brightness values ​​of all first display pixels 101 in at least one display partition 101A, and the second brightness sum is equal to the sum of the original brightness values ​​of all second display pixels 102 in at least one display partition 101A. Thus, the brightness matching ratio of the first display pixels 101 to the second display pixels 102 in at least one display partition 101A containing the dark pixel 104 is accurately quantified.

[0059] It should be noted that when calculating the sum of the original brightness values ​​of all second display pixels 102 in display partition 101A, as mentioned above, since the dark pixel 104 belonging to the second display pixel 102 does not emit light, its original brightness value is equal to 0.

[0060] In some embodiments, the first luminance ratio coefficient may be equal to the sum of the first luminance divided by the sum of the second luminance.

[0061] In an exemplary embodiment, when the first display pixel 101 is a red pixel and the second display pixel 102 is a green pixel, the calculation method for the first brightness ratio coefficient can be as shown in the following formula (1):

[0062]

[0063] Where a1 represents the first brightness ratio coefficient, all red pixels in a display partition 101A containing dark pixel 104 are from the l-th red pixel to the (l+k)-th red pixel, and all green pixels in a display partition 101A containing dark pixel 104 are also from the l-th green pixel to the (l+k)-th green pixel. This represents the original brightness value of the i-th red pixel. Represents the original brightness value of the i-th green pixel, where i is greater than or equal to l and less than or equal to (l+k).

[0064] In some embodiments, the second brightness matching coefficient is determined based on a third brightness sum and a fourth brightness sum. The third brightness sum is equal to the sum of the original brightness values ​​of all first display pixels 101 in the local processing region 102A, and the fourth brightness sum is equal to the sum of the original brightness values ​​of all second display pixels 102 in the local processing region 102A. This accurately quantifies the brightness matching between the first display pixels 101 and the second display pixels 102 in the local processing region 102A.

[0065] It should be noted that, similarly, when summing the original brightness values ​​of all second display pixels 102 in the local processing area 102A, as mentioned above, since the dark pixel 104 belonging to the second display pixel 102 does not emit light, its original brightness value is equal to 0.

[0066] In some embodiments, the second luminance ratio coefficient may be equal to the sum of the third luminance divided by the sum of the fourth luminance.

[0067] In an exemplary embodiment, when the first display pixel 101 is a red pixel and the second display pixel 102 is a green pixel, the calculation method for the second brightness ratio coefficient can be as shown in the following formula (2):

[0068]

[0069] Where b1 represents the second brightness ratio coefficient, all red pixels in the local processing area 102A are from the m-th red pixel to the (m+n)-th red pixel, and all green pixels in the local processing area 102A are also from the m-th green pixel to the (m+n)-th green pixel. This represents the original brightness value of the i2th red pixel. Represents the original brightness value of the i2th green pixel, where i2 is greater than or equal to m and less than or equal to (m+n).

[0070] In other embodiments, the second brightness ratio coefficient is determined based on the fifth brightness sum and the sixth brightness sum. The fifth brightness sum is equal to the sum of the processed brightness values ​​of all first display pixels 101 in the local processing area 102A. The sixth brightness sum is equal to the sum of the original brightness values ​​of all second display pixels 102 in the local processing area 102A. The processed brightness values ​​are determined based on the original brightness values ​​of the first display pixels 101 and the brightness weighting coefficients. The brightness weighting coefficients are inversely proportional to the distance between the first display pixels 101 and the dark pixel 104. The sum of the brightness weighting coefficients of all first display pixels 101 equals 1.

[0071] Therefore, the fifth brightness sum takes into account the contribution of the distance between the first display pixel 101 to the dark pixel 104 to the fifth brightness sum. After the brightness compensation coefficient calculated based on the fifth brightness sum and other brightness data is used to compensate the first display pixel 101 of the local processing area 102A, the local processing area 102A achieves a visual color transition effect, and the color display is more natural and smooth.

[0072] It should be noted that the closer the distance between the first display pixel 101 and the dark pixel 104, the higher the corresponding brightness weighting coefficient.

[0073] In other embodiments, the second luminance ratio factor may be equal to the sum of the fifth luminance divided by the sum of the sixth luminance.

[0074] In another example embodiment, when the first display pixel 101 is a red pixel and the second display pixel 102 is a green pixel, the calculation method for the second brightness ratio coefficient can be as shown in the following formula (3):

[0075]

[0076] Where b1 represents the second brightness ratio coefficient, all red pixels in the local processing area 102A are from the m-th red pixel to the (m+n)-th red pixel, and all green pixels in the local processing area 102A are also from the m-th green pixel to the (m+n)-th green pixel. This represents the original brightness value of the i2th red pixel. p represents the original brightness value of the i2th green pixel. i2 This represents the luminance weight coefficient corresponding to the original luminance value of the i2th red pixel, where i2 is greater than or equal to m and less than or equal to (m+n).

[0077] In some embodiments, when the display pixel 107 to be compensated includes a first display pixel 101, the brightness compensation coefficient of all first display pixels 101 in the local processing area 102A can be equal to the first brightness ratio coefficient divided by the second brightness ratio coefficient.

[0078] In an exemplary embodiment, the first brightness ratio coefficient can be a1 as described above, the second brightness ratio coefficient can be b1 as described above, and the brightness compensation coefficient of all first display pixels 101 in the local processing area 102A can be equal to a1 / b1.

[0079] In some embodiments, such as Figure 2 As shown, at least one display pixel 107 to be compensated can correspond to the first display pixel 101, and at least another display pixel 107 to be compensated can also correspond to a third display pixel 103. The brightness compensation coefficient of the third display pixel 103 is determined based on a third brightness ratio coefficient and a fourth brightness ratio coefficient. The third brightness ratio coefficient represents the brightness ratio of all third display pixels 103 to all second display pixels 102 in at least one display partition 101A. The fourth brightness ratio coefficient represents the brightness ratio of all third display pixels 103 to all second display pixels 102 in the local processing area 102A.

[0080] In some embodiments, the third brightness matching coefficient is determined based on the seventh brightness sum and the second brightness sum. The seventh brightness sum is equal to the sum of the original brightness values ​​of all third display pixels 103 in at least one display partition 101A, and the second brightness sum is equal to the sum of the original brightness values ​​of all second display pixels 102 in at least one display partition 101A. Thus, the brightness matching ratio of the third display pixels 103 to the second display pixels 102 in at least one display partition 101A containing the dark pixel 104 is accurately quantified.

[0081] In some embodiments, the third luminance ratio coefficient may be equal to the sum of the seventh luminance divided by the sum of the second luminance.

[0082] In an exemplary embodiment, when the third display pixel 103 is a blue pixel and the second display pixel 102 is a green pixel, the calculation method for the third brightness ratio coefficient can be as shown in the following formula (4):

[0083]

[0084] Where a2 is the third brightness ratio coefficient, all blue pixels in a display partition 101A containing dark pixel 104 are from the l-th blue pixel to the (l+k)-th blue pixel, and all green pixels in a display partition 101A containing dark pixel 104 are also from the l-th green pixel to the (l+k)-th green pixel. This represents the original brightness value of the i1th blue pixel. This represents the original brightness value of the i1th green pixel, where i1 is greater than or equal to l and less than or equal to (l+k).

[0085] Among them, in the above formulas (1) and (4) as well as The values ​​can be calculated using the formulas corresponding to the original grayscale signals of the red, green, and blue pixels and the Gamma2.2 curve, respectively. The specific calculation formulas are shown in formulas (5) to (7).

[0086]

[0087] Among them, Lv Gray255_R This represents the brightness value corresponding to a grayscale value of 255 for a red pixel; it is a constant. Gray255_G This represents the brightness value corresponding to a grayscale value of 255 for a green pixel; it is a constant. Gray255_B This represents the brightness value corresponding to a grayscale value of 255 for a blue pixel; it is a constant. Furthermore, Gray... R The grayscale value corresponding to the original grayscale signal of the red pixel, Gray G The grayscale value corresponding to the original grayscale signal of the green pixel, Gray B The grayscale value corresponding to the original grayscale signal of the blue pixel, Gray 255 It is 255.

[0088] In some embodiments, the fourth brightness ratio coefficient is determined based on the eighth brightness sum and the fourth brightness sum, where the eighth brightness sum is equal to the sum of the original brightness values ​​of all third display pixels 103 in the local processing region 102A, and the fourth brightness sum is equal to the sum of the original brightness values ​​of all second display pixels 102 in the local processing region 102A. This accurately quantifies the brightness ratio between the third display pixels 103 and the second display pixels 102 in the local processing region 102A.

[0089] In some embodiments, the fourth luminance ratio coefficient may be equal to the sum of the eighth luminance divided by the sum of the fourth luminance.

[0090] In an exemplary embodiment, when the third display pixel 103 is a blue pixel and the second display pixel 102 is a green pixel, the calculation method for the fourth brightness ratio coefficient can be as shown in the following formula (8):

[0091]

[0092] Where b2 is the fourth brightness ratio coefficient, all blue pixels in the local processing area 102A are from the m-th blue pixel to the (m+n)-th blue pixel, and all green pixels in the local processing area 102A are also from the m-th green pixel to the (m+n)-th green pixel. This represents the original brightness value of the i2th blue pixel. Represents the original brightness value of the i2th green pixel, where i2 is greater than or equal to m and less than or equal to (m+n).

[0093] In other embodiments, the fourth brightness matching coefficient is determined based on the ninth brightness sum and the sixth brightness sum. The ninth brightness sum is equal to the sum of the processed brightness values ​​of all third display pixels 103 in the local processing area 102A. The sixth brightness sum is equal to the sum of the original brightness values ​​of all second display pixels 102 in the local processing area 102A. The processed brightness value is determined based on the original brightness value of the third display pixel 103 and the brightness weighting coefficient. The brightness weighting coefficient is inversely proportional to the distance between the third display pixel 103 and the dark pixel 104. The sum of the brightness weighting coefficients of all third display pixels 103 in the local processing area 102A is equal to 1. Thus, the ninth brightness sum takes into account the contribution of the distance between the third display pixel 103 to be compensated and the dark pixel 104 to the ninth brightness sum, so that after the brightness compensation coefficient calculated based on the ninth brightness sum and other brightness data is used to compensate the third display pixels 103 in the local processing area 102A, the local processing area 102A achieves a visual color transition effect, and the color display is more natural and smooth.

[0094] In another example embodiment, when the third display pixel 103 is a blue pixel and the second display pixel 102 is a green pixel, the calculation method for the fourth brightness ratio coefficient can be shown in the following formula (9):

[0095]

[0096] Where b2 represents the fourth brightness ratio coefficient, all blue pixels in the local processing area 102A are from the m-th blue pixel to the (m+n)-th blue pixel, and all green pixels in the local processing area 102A are also from the m-th green pixel to the (m+n)-th green pixel. This represents the original brightness value of the i2th blue pixel. q represents the original brightness value of the i2th green pixel. i2 This represents the luminance weight coefficient corresponding to the original luminance value of the i2th blue pixel, where i2 is greater than or equal to m and less than or equal to (m+n).

[0097] In some embodiments, when the display pixel 107 to be compensated includes a third display pixel 103, the brightness compensation coefficient of all third display pixels 103 in the local processing area 102A can be equal to the third brightness ratio coefficient divided by the fourth brightness ratio coefficient.

[0098] In an exemplary embodiment, when the third display pixel 103 is a blue pixel, the third brightness ratio coefficient can be a2 as described above, the fourth brightness ratio coefficient can be b2 as described above, and the brightness compensation coefficient of all third display pixels 103 in the local processing area 102A can be equal to a2 / b2.

[0099] In some embodiments of this application, the brightness compensation coefficient of the display pixel 107 to be compensated in the local processing area 102A can also be calculated from both chromaticity and brightness perspectives, so as to compensate the display pixel 107 to be compensated from both chromaticity and brightness perspectives, thereby improving the overall display effect of at least one display partition 101A where the dark pixel 104 is located.

[0100] In some embodiments, the target color difference is determined based on the original brightness values ​​of all display pixels 100 in the local processing area 102A and the brightness compensation coefficients of the display pixels 107 to be compensated in all display pixels 100, as well as the original brightness values ​​of all display pixels 100 in at least one display partition 101A.

[0101] Therefore, based on the mathematical formula for calculating the target color difference, the brightness compensation coefficient of the display pixel 107 to be compensated in the local processing area 102A can be calculated. When the target color difference is small, after compensating the display pixel 107 to be compensated in the local processing area 102A based on the brightness compensation coefficient, the chromaticity and brightness of the display pixel 100 in the local processing area 102A can be matched with the chromaticity and brightness of the display pixel 100 in the display partition 101A where the dark pixel 104 is located, thereby improving the overall display quality of the display device 200.

[0102] In some embodiments, the target color difference can be greater than or equal to 0 and less than or equal to 0.5. The closer the target color difference is to 0, the better the display effect after compensating the display pixel 107 using the brightness compensation coefficient. Optionally, the target color difference can be greater than or equal to 0 and less than or equal to 0.25. For example, the target color difference can be equal to 0.

[0103] In some embodiments, the display pixel 107 to be compensated corresponds to the first display pixel 101 and the third display pixel 103, and the dark pixel 104 corresponds to the second display pixel 102. The brightness compensation coefficient of the display pixel 107 to be compensated includes the first brightness compensation coefficient of the first display pixel 101 and the second brightness compensation coefficient of the third display pixel 103.

[0104] It should be noted that, based on the calculation method for the target color difference, a mathematical relationship can be obtained that includes the first brightness compensation coefficient and the second brightness compensation coefficient as variables. Based on this mathematical relationship, the first brightness compensation coefficient and the second brightness compensation coefficient can be set.

[0105] For the local processing area 102A, based on the original brightness values ​​and first brightness compensation coefficients of all first display pixels 101, the original brightness values ​​and second brightness compensation coefficients of all third display pixels 103, and the original brightness values ​​of all second display pixels 102, the first stimulation value of the first display pixels 101, the second stimulation value of the second display pixels 102, and the third stimulation value of the third display pixels 103 are determined.

[0106] In some embodiments, such as Figure 3 As shown, the calculation method for the first to third stimulus values ​​may include the following steps:

[0107] Step S101: Sum the original brightness values ​​of all first display pixels 101 in the local processing area 102A to obtain the eleventh brightness sum, and then multiply the eleventh brightness sum by the first brightness compensation coefficient to obtain the first compensated brightness sum.

[0108] Step S102: Sum the original brightness values ​​of all third display pixels 103 in the local processing area 102A to obtain the twelfth brightness sum, and then multiply the twelfth brightness sum by the second brightness compensation coefficient to obtain the second compensated brightness sum;

[0109] Step S103: Sum the original brightness values ​​of all second display pixels 102 in the local processing area 102A to obtain the thirteenth brightness sum;

[0110] Step S104: Sum the first compensated brightness 、 Summing the second and thirteenth total brightness results in the first total brightness of the local processing region 102A.

[0111] Step S105: Sum the first compensated brightness 、The thirteenth total brightness and the second compensated total brightness are divided by the first total brightness to obtain the first relative brightness of the first display pixel 101, the second relative brightness of the second display pixel 102, and the third relative brightness of the third display pixel 103 in the local processing area 102A; and

[0112] Step S106: Based on the first relative brightness of the first display pixel 101, the second relative brightness of the second display pixel 102, and the third relative brightness of the third display pixel 103 in the local processing area 102A, obtain the first stimulation value of the first display pixel 101, the second stimulation value of the second display pixel 102, and the third stimulation value of the third display pixel 103.

[0113] It should be noted that this application does not specify the order of steps S101 to S107.

[0114] In some embodiments, based on the first relative brightness of the first display pixel 101, the second relative brightness of the second display pixel 102, and the third relative brightness of the third display pixel 103 in the local processing region 102A, the first stimulation value of the first display pixel 101, the second stimulation value of the second display pixel 102, and the third stimulation value of the third display pixel 103 can be obtained using the following formulas (10) to (11):

[0115]

[0116]

[0117] Wherein, R represents the first relative brightness of the first display pixel 101, G represents the second relative brightness of the second display pixel 102, B represents the third relative brightness of the third display pixel 103, X represents the first stimulus value, Y represents the second stimulus value, and Z represents the third stimulus value.

[0118] For at least one display partition 101A, a fourth stimulus value for the first display pixel 101, a fifth stimulus value for the second display pixel 102, and a sixth stimulus value for the third display pixel 103 are determined based on the original brightness values ​​of all first display pixels 101, all second display pixels 102, and all third display pixels 103.

[0119] In some embodiments, the method for calculating the fourth to sixth stimulus values ​​may include the following steps:

[0120] Step S201: Sum the original brightness values ​​of all first display pixels 101 in at least one display partition 101A to obtain the fourteenth brightness sum;

[0121] Step S202: Sum the original brightness values ​​of all second display pixels 102 in at least one display partition 101A to obtain the fifteenth brightness sum;

[0122] Step S203: Sum the original brightness values ​​of all third display pixels 103 in at least one display partition 101A to obtain the sixteenth brightness sum;

[0123] Step S204: Sum the fourteenth brightness sum, the fifteenth brightness sum, and the sixteenth brightness sum to obtain the second brightness sum of at least one display zone 101A;

[0124] Step S205: Divide the fourteenth total brightness, the fifteenth total brightness, and the sixteenth total brightness by the second total brightness respectively to obtain the fourth relative brightness of the first display pixel 101, the fifth relative brightness of the second display pixel 102, and the sixth relative brightness of the third display pixel 103 in at least one display partition 101A.

[0125] Step S206: Based on the fourth relative brightness of the first display pixel 101, the fifth relative brightness of the second display pixel 102, and the sixth relative brightness of the third display pixel 103 in at least one display partition 101A, obtain the fourth stimulation value of the first display pixel 101, the fifth stimulation value of the second display pixel 102, and the sixth stimulation value of the third display pixel 103 in at least one display partition 101A.

[0126] It should be noted that the calculation formulas for the fourth to sixth stimulus values ​​can be found in the above formulas for the first to third stimulus values. Simply replace the first to third relative brightness values ​​in the above formula (10) with the fourth to sixth relative brightness values.

[0127] In some embodiments, the method for calculating the target color difference may further include the following steps:

[0128] By spatially transforming the first stimulus value of the first display pixel, the second stimulus value of the second display pixel, and the third stimulus value of the third display pixel, a first luminance component, a first color component from green to red, and a second color component from blue to yellow are obtained.

[0129] The fourth stimulus value of the first display pixel, the fifth stimulus value of the second display pixel, and the sixth stimulus value of the third display pixel are spatially transformed to obtain a second luminance component, a third color component from green to red, and a fourth color component from blue to yellow.

[0130] The target color difference is determined based on the first luminance component, the first color component, the second color component, the second luminance component, the third color component, and the fourth color component.

[0131] It should be noted that the commonly used XYZ color space to LAB color space conversion method can be used to convert the first stimulus value to the third stimulus value of the first display pixel 101 to obtain the first luminance component, the first color component and the second color component through space conversion, and the fourth stimulus value to the sixth stimulus value to obtain the second luminance component, the third color component and the fourth color component through space conversion.

[0132] After obtaining the first luminance component, the first color component, the second color component, the second luminance component, the third color component, and the fourth color component, the target color difference can be obtained based on any one of the CIE 1976 colorimetric calculation formula, the CIE 1994 colorimetric calculation formula, and the CIE 2000 colorimetric calculation formula.

[0133] In some embodiments, the target color difference can be calculated as shown in formula (12):

[0134]

[0135] Where ΔE represents the target color difference, L0 represents the first luminance component, and L aim a represents the second luminance component, a0 represents the first color component, and a aim b0 represents the third color component, b0 represents the second color component, b aim This represents the fourth color component.

[0136] It should also be noted that the above formula only uses green pixels as an example to calculate the brightness compensation coefficients for red and blue pixels as the display pixels to be compensated. It can be understood that dark pixels can also be one or both red and blue pixels, and the display pixels to be compensated can also be red pixels. The calculation principle for the brightness compensation coefficients of the display pixels to be compensated is the same as above, and will not be repeated here.

[0137] In some embodiments, the method for identifying dark pixel 104 among a plurality of display pixels 100 includes: dividing a test image obtained when the plurality of display pixels 100 of the display panel 10 are displayed in a preset grayscale into a plurality of image partitions, each image partition including a plurality of image pixels, each image pixel corresponding to a display pixel 100; determining a standard brightness value of each image partition and a brightness value of each image pixel in the image partition; when the difference between the standard brightness value of the image partition and the brightness value of one image pixel in the image partition is less than a first brightness threshold, then determining that the display pixel 100 corresponding to the image pixel is a low brightness pixel 106; and determining whether the low brightness pixel 106 is a dark pixel 104.

[0138] Therefore, in this embodiment of the application, a test image corresponding to the display panel 10 when it is displayed in a preset grayscale is collected, and then the test image is partitioned. The relative size between the difference between the standard brightness value and the brightness value of the image pixel in each image partition and the first brightness threshold is determined to identify the low brightness pixel 106 in the display panel. Then, it is determined whether the low brightness pixel 106 is a dark pixel 104.

[0139] In some embodiments, the test image may include an image acquired when a plurality of display pixels 100 of the display panel 10 display a monochrome image at a preset grayscale. The monochrome image may include one or more of a red image, a green image, and a blue image. Based on the green image, low-brightness pixels 106 emitting green light in the display panel 10 can be identified. Similarly, low-brightness pixels 106 emitting red light can be identified based on the red image, and low-brightness pixels 106 emitting blue light can be identified based on the blue image.

[0140] In some embodiments, for each monochrome image, multiple images corresponding to multiple monochrome images can be acquired separately, and low-brightness pixels 106 can be determined by using the images corresponding to multiple monochrome images, thereby improving the accuracy of determining low-brightness pixels 106. The multiple images corresponding to multiple monochrome images can be obtained based on different preset grayscale levels.

[0141] In some embodiments, the preset grayscale can be a medium-high grayscale, and the grayscale value of the medium-high grayscale can be greater than or equal to 128. This improves the problem of uneven brightness in the corresponding image displayed at a low grayscale interfering with the determination of the low-brightness pixel 106.

[0142] In some embodiments, the image of the display panel 10 when it is displayed in a preset grayscale can be acquired by an imaging device such as a camera.

[0143] In some embodiments, the brightness values ​​of the image pixels in the acquired test image can be measured using a colorimeter.

[0144] In some embodiments, such as Figure 2 As shown, determining whether a low-brightness pixel 106 is a dark pixel 104 includes: when at least two low-brightness pixels 106 (e.g., three low-brightness pixels 106 in display partition 101A2) are adjacent to each other, then each of the at least two low-brightness pixels 106 is not a dark pixel 104. Generally, at least two adjacent low-brightness pixels 106 are adjacent normal display pixels 100 that are obscured by foreign objects such as dust. Therefore, determining that each of the at least two adjacent low-brightness pixels 106 is not a dark pixel 104 can improve the accuracy of determining the dark pixel 104.

[0145] In some embodiments, such as Figure 2As shown, determining whether a low-brightness pixel 106 is a dark pixel 104 also includes: when a low-brightness pixel 106 is surrounded by a bright pixel 105 (e.g., a bright pixel 105 in display partition 101A3), the low-brightness pixel 106 surrounding the bright pixel 105 is not a dark pixel 104. Since the brightness of the bright pixel 105 can interfere with the brightness of surrounding pixels, resulting in a large error in the brightness information of the area where the bright pixel 105 is located, determining that the low-brightness pixel 106 surrounding the bright pixel 105 is not a dark pixel 104 can improve the accuracy of determining the dark pixel 104.

[0146] In some embodiments, the method for determining the bright spot pixel 105 includes: when the difference between the brightness value of an image pixel in an image partition and the standard brightness value of the image partition is greater than a second brightness threshold, then the display pixel 100 corresponding to the image pixel is determined to be the bright spot pixel 105. Thus, by determining the relative magnitude between the difference between the brightness value of an image pixel in each image partition and the standard brightness value and the second brightness threshold, the bright spot pixel 105 can be determined.

[0147] In some embodiments, the standard brightness value of an image partition is equal to the average brightness value of a plurality of image pixels in the image partition.

[0148] Based on the same inventive concept, such as Figure 1 , Figure 2 and Figure 4 As shown, some embodiments of this application also provide a driving method for a display device 200. The display device 200 includes a display panel 10, a source driver 20, and a timing controller 30. The source driver 20 is connected to the display panel 10. The timing controller 30 is connected to both the display panel 10 and the source driver 20. The display panel 10 includes a plurality of display pixels 100, each of which includes a dark pixel 104 and a display pixel 107 to be compensated, the display pixel 107 being located around the dark pixel 104. The driving method includes the following steps:

[0149] Step S301: The timing controller receives the original grayscale signal of the display pixel to be compensated and generates the compensation data signal of the display pixel to be compensated; wherein, the voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal.

[0150] Step S302: The timing controller sends a compensation data signal, causing the source driver to drive the display pixel to be compensated to emit light according to the compensation data signal.

[0151] In the driving method of the display device in some embodiments of this application, the timing controller receives the original grayscale signal of the display pixel to be compensated around the dark pixel, generates a compensation data signal of the display pixel to be compensated, and the voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal, so that the display effect of the display pixel to be compensated is more matched with the display effect of the dark pixel, thereby improving the overall display quality of the display device.

[0152] The above description of the embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application; those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, characterized in that, include: The display panel includes a plurality of display pixels, the plurality of display pixels including dark pixel and display pixel to be compensated, the display pixel to be compensated being located around the dark pixel; A source driver is connected to the display panel; A timing controller, connected to the display panel and the source driver, is configured to: The original grayscale signal of the pixel to be compensated is received, and a compensation data signal of the pixel to be compensated is generated; wherein the voltage value of the compensation data signal is less than the voltage value of the original data signal corresponding to the original grayscale signal. as well as, The compensation data signal is sent so that the source driver drives the display pixel to be compensated to emit light according to the compensation data signal.

2. The display device according to claim 1, characterized in that, The plurality of display pixels constitute a plurality of pixel units, and the plurality of pixel units are arranged along a first direction and a second direction, wherein the first direction intersects the second direction; The plurality of pixel units include a first pixel unit, which includes the dark pixel and at least one of the display pixels to be compensated.

3. The display device according to claim 2, characterized in that, The plurality of pixel units further include a second pixel unit, the second pixel unit including at least one of the display pixels to be compensated; wherein, in the first direction and / or the second direction, one or more of the second pixel units are adjacent to the first pixel unit.

4. The display device according to claim 1, characterized in that, The compensation data signal is determined based on the compensation grayscale value, which is obtained by converting the compensation brightness value. The compensation brightness value is determined based on the original brightness value and brightness compensation coefficient of the display pixel to be compensated, and the original brightness value is obtained by converting the original grayscale value corresponding to the original grayscale signal.

5. The display device according to claim 4, characterized in that, The display pixels include a first display pixel and a second display pixel, the first display pixel and the second display pixel are configured to emit light of different colors, the display panel has multiple display zones, at least one of the display zones includes a local processing area, the local processing area is provided with the dark pixel and the display pixels to be compensated around the dark pixel; at least one of the display pixels to be compensated corresponds to the first display pixel, the dark pixel corresponds to the second display pixel; The brightness compensation coefficient of the first display pixel is determined based on a first brightness ratio coefficient and a second brightness ratio coefficient. The first brightness ratio coefficient represents the brightness ratio of all first display pixels and all second display pixels in the at least one display partition, and the second brightness ratio coefficient represents the brightness ratio of all first display pixels and all second display pixels in the local processing area.

6. The display device according to claim 5, characterized in that, The first brightness ratio coefficient is determined based on the first total brightness and the second total brightness. The first total brightness is equal to the sum of the original brightness values ​​of all first display pixels in the at least one display partition, and the second total brightness is equal to the sum of the original brightness values ​​of all second display pixels in the at least one display partition.

7. The display device according to claim 5, characterized in that, The second brightness ratio coefficient is determined based on the third brightness sum and the fourth brightness sum. The third brightness sum is equal to the sum of the original brightness values ​​of all first display pixels in the local processing area, and the fourth brightness sum is equal to the sum of the original brightness values ​​of all second display pixels in the local processing area.

8. The display device according to claim 5, characterized in that, The second brightness ratio coefficient is determined based on the fifth brightness sum and the sixth brightness sum. The fifth brightness sum is equal to the sum of the processed brightness values ​​of all first display pixels in the local processing area, and the sixth brightness sum is equal to the sum of the original brightness values ​​of all second display pixels in the local processing area. The processed brightness value is determined based on the original brightness value of the first display pixel and the brightness weighting coefficient. The brightness weighting coefficient is inversely proportional to the distance between each first display pixel and the dark pixel. The sum of the brightness weighting coefficients of all first display pixels in the local processing area is equal to 1.

9. The display device according to claim 4, characterized in that, The display panel has multiple display zones, and at least one of the display zones includes a local processing area, wherein the local processing area is provided with the dark pixel and the display pixels to be compensated surrounding the dark pixel; The target color difference is determined based on the original brightness values ​​of all display pixels in the local processing area, the brightness compensation coefficient of the display pixels to be compensated in all display pixels, and the original brightness values ​​of all display pixels in at least one of the display partitions.

10. The display device according to claim 9, characterized in that, The display pixels include a first display pixel, a second display pixel, and a third display pixel. The first display pixel, the second display pixel, and the third display pixel are respectively configured to emit light of different colors. The dark pixel corresponds to the second display pixel. The display pixel to be compensated corresponds to the first display pixel and the third display pixel. The brightness compensation coefficient of the display pixel to be compensated includes a first brightness compensation coefficient of the first display pixel and a second brightness compensation coefficient of the third display pixel. For the local processing area, based on the original brightness values ​​of all the first display pixels and the first brightness compensation coefficient, the original brightness values ​​of all the third display pixels and the second brightness compensation coefficient, and the original brightness values ​​of all the second display pixels, the first stimulation value of the first display pixel, the second stimulation value of the second display pixel, and the third stimulation value of the third display pixel are determined. The first stimulus value of the first display pixel, the second stimulus value of the second display pixel, and the third stimulus value of the third display pixel are spatially transformed to obtain a first luminance component, a first color component from green to red, and a second color component from blue to yellow. For at least one of the display partitions, based on the original brightness values ​​of all the first display pixels, all the second display pixels, and all the third display pixels, a fourth stimulus value, a fifth stimulus value, and a sixth stimulus value of the first display pixels in at least one of the display partitions are determined. The fourth stimulus value of the first display pixel, the fifth stimulus value of the second display pixel, and the sixth stimulus value of the third display pixel are spatially transformed to obtain a second luminance component, a third color component from green to red, and a fourth color component from blue to yellow. The target color difference is determined based on the first luminance component, the first color component, the second color component, the second luminance component, the third color component, and the fourth color component.

Images