Compensation device, display panel and compensation method thereof

Abstract

The application provides a compensation device, a display panel and a compensation method thereof. The compensation method comprises the following steps: controlling a first display part to display a light load picture based on a standard gamma curve, sub-pixels corresponding to two adjacent lines electrically connected to a first data line display at a first preset gray scale and a first gray scale respectively, obtaining a first brightness of the sub-pixels of the first display part at the first gray scale, controlling a second display part to display a heavy load picture, sub-pixels corresponding to two adjacent lines electrically connected to a second data line display at a second preset gray scale and the first gray scale respectively, obtaining a second brightness of the sub-pixels of a first sub-display part in the second display part at the first gray scale, and determining first compensation data corresponding to the first gray scale and the second preset gray scale of the sub-pixels of the first display part according to the difference between the first brightness and the second brightness, so as to simultaneously improve multiple defects in a target panel by using the first compensation data, and the cost of the display panel is reduced.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to the manufacture of display devices, specifically to compensation equipment, display panels, and compensation methods thereof. Background Technology

[0002] As the most widely used display currently, LCD monitors can adopt a three-gate driving architecture to reduce the number of data lines to 1 / 3 of the normal driving architecture, while increasing the number of scan lines to 3 times that of the normal driving architecture, thus reducing the width and charging time of each gate pulse to 1 / 3 of the normal driving architecture.

[0003] In a three-gate drive architecture, on the one hand, such as Figure 1 As shown, when displaying a solid color image, the amplitude of the signal on the same data line (each of D1, D2, D3 to Dn) is constantly fluctuating between high and low, resulting in a heavy-load image. Furthermore, after each gate line (each of G1, G2, G3 to Gn) activates its corresponding row of pixels, the charging time for each row of pixels is insufficient, causing uneven charging in the display. On the other hand, differences in other factors within the display can also lead to uneven non-charging display. Existing displays typically store and use at least two types of compensation data to compensate for display defects caused by at least two different reasons, resulting in a large storage space requirement and increased cost. Summary of the Invention

[0004] The purpose of this invention is to provide a compensation device, a display panel, and a compensation method thereof to solve the technical problem that existing displays typically require a large amount of storage space due to the separate storage of at least two types of compensation data for at least two different types of compensation.

[0005] This invention provides a compensation method for a display panel, comprising:

[0006] The first display section of the control target panel displays a light-loaded image based on a standard gamma curve. In the light-loaded image, the sub-pixels of the corresponding N1th row that are electrically connected to the first data line are displayed under the first preset gray level, and the sub-pixels of the corresponding (N1+1)th row are displayed under the first gray level, where N1 is a positive integer.

[0007] The second display unit of the target panel is controlled to display a reloaded image. The second display unit is located on at least one side of the first display unit. In the reloaded image, the sub-pixels of the corresponding N2 row that are electrically connected to the second data line are displayed in the second preset grayscale, and the sub-pixels of the corresponding (N2+1) row are displayed in the first grayscale. N2 is a positive integer. N2 and N1 are equal or unequal. The first data line and the second data line are the same or different. The sub-pixels of the (N1+1) row and the sub-pixels of the (N2+1) row are both first color sub-pixels.

[0008] Obtain the first brightness of the first color sub-pixel of the first display unit that is electrically connected to the first data line in the (N1+1)th row;

[0009] Obtain the second brightness of the first color sub-pixel of the first sub-display unit in the second display unit that is electrically connected to the second data line in the (N2+1)th row;

[0010] Based on the difference between the first brightness and the second brightness, it is determined that the first color sub-pixel in at least the first sub-display portion of the target panel corresponds to the first grayscale and the second preset grayscale, and thus the first compensation data.

[0011] In one embodiment, the first preset gray level is equal to the first gray level.

[0012] In one embodiment, in the overloaded image, the sub-pixel of the corresponding N3 row electrically connected to the third data line is displayed at a third preset grayscale, and the first color sub-pixel of the corresponding (N3+1) row is displayed at a second grayscale. The third preset grayscale and the second preset grayscale are the same or different, and / or the second grayscale and the first grayscale are the same or different. N3, N2, and N1 are all equal or unequal. The first data line, the second data line, and the third data line are the same or different. The method further includes:

[0013] The third brightness of the first color sub-pixel of the second sub-display unit electrically connected to the third data line in the second display unit is obtained, and the third brightness is different from the second brightness;

[0014] Based on the difference between the first brightness and the third brightness, the second compensation data corresponding to the second grayscale and the third preset grayscale is determined for the first color sub-pixel of at least the second sub-display portion in the target panel.

[0015] In one embodiment, the second sub-display unit and the first sub-display unit are arranged adjacent to each other.

[0016] In one embodiment, a plurality of said sub-pixels are provided between the second sub-display portion and the first sub-display portion.

[0017] In one embodiment, multiple sub-pixels in the N1th row of the light-loaded image are displayed under the first preset grayscale, and multiple first color sub-pixels in the corresponding (N1+1)th row are displayed under the first grayscale;

[0018] In the reloaded image, multiple sub-pixels in the N2th row are displayed under the second preset grayscale, and the corresponding multiple first color sub-pixels in the (N2+1)th row are displayed under the first grayscale;

[0019] The step of obtaining the first brightness of the first color sub-pixel of the first display unit electrically connected to the first data line in the (N1+1)th row includes:

[0020] Obtain multiple first actual brightness values ​​corresponding to multiple first color sub-pixels in the (N1+1)th row of the first display unit, and calculate the average value of the multiple first actual brightness values ​​as the first brightness value;

[0021] The step of obtaining the second brightness of the first color sub-pixel of the first sub-display unit electrically connected to the second data line in the (N2+1)th row of the second display unit includes:

[0022] Obtain multiple second actual brightness values ​​corresponding to multiple first color sub-pixels in the (N2+1)th row of the first sub-display section, and calculate the average value of the multiple second actual brightness values ​​as the second brightness value.

[0023] In one embodiment, the step of displaying a lightly loaded image on the first display section of the control target panel based on a standard gamma curve includes:

[0024] Based on the difference between the standard gamma curve and the original gamma curve of the first display, the third compensation data of the first display is determined;

[0025] Based on the third compensation data, the first display unit is controlled to display the light load screen.

[0026] The present invention also provides a compensation method for a display panel, the display panel comprising multiple rows of sub-pixels, each row of sub-pixels being a first color sub-pixel, a second color sub-pixel, or a third color sub-pixel, the multiple rows of sub-pixels being arranged cyclically in the column direction in the order of the second color sub-pixel, the third color sub-pixel, and the first color sub-pixel, the method comprising:

[0027] The first display section of the control target panel displays a light-loaded image based on a standard gamma curve. In the light-loaded image, the second color sub-pixel, the third color sub-pixel, and the first color sub-pixel are all displayed at the first test grayscale.

[0028] The second display unit of the target panel is controlled to display a reloaded image. The second display unit is located on at least one side of the first display unit. In the reloaded image, the second color sub-pixel and the third color sub-pixel are both displayed under the second test grayscale, and the first color sub-pixel is displayed under the first test grayscale.

[0029] Obtain the first test brightness of the first color sub-pixel in the first display unit;

[0030] Obtain the second test brightness of the sub-pixel of the first sub-display portion in the second display portion;

[0031] Based on the difference between the first test brightness and the second test brightness, the fourth compensation data corresponding to the first color sub-pixel of at least the first sub-display portion in the target panel is determined to be that the first color sub-pixel corresponds to the first test grayscale and the second test grayscale.

[0032] The present invention also provides a display panel, comprising:

[0033] The processor is configured to compensate for the brightness of at least the sub-pixels in the first sub-display unit based on the first compensation data determined by the compensation method for the display panel described above, and / or the fourth compensation data determined by the compensation method for the display panel described above.

[0034] In one embodiment, it further includes:

[0035] A memory for storing the first compensation data determined according to the compensation method of the display panel as described above, and / or the fourth compensation data determined according to the compensation method of the display panel as described above.

[0036] This invention provides a compensation device, a display panel, and a compensation method thereof. By controlling a first display section of a target panel to display a lightly loaded image based on a standard gamma curve, and controlling a second display section of the target panel to display a heavily loaded image, the invention acquires the first brightness of the first color sub-pixel of the first display section electrically connected to the first data line in the (N1+1)th row, and the second brightness of the first color sub-pixel of the first sub-display section of the second display section electrically connected to the second data line in the (N2+1)th row. Based on the difference between the first brightness and the second brightness, the invention determines first compensation data corresponding to the first grayscale and the second preset grayscale for the first color sub-pixel of at least the first sub-display section in the target panel. In other words, this invention can simultaneously improve the uneven brightness caused by two factors—non-compliance with human visual perception of brightness standards and uneven charging / display—when at least the first sub-display section of the target panel is subjected to the above grayscale changes (causing brightness changes, ending at the second brightness). This avoids storing at least two sets of data to separately improve the aforementioned defects, thus reducing the cost of the display panel. Attached Figure Description

[0037] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings described below are merely for illustrating some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0038] Figure 1 This is a schematic diagram showing the connection of pixels, gate lines, and data lines in a display panel with a tri-gate driving architecture provided in an embodiment of the present invention.

[0039] Figure 2 This is a flowchart of one embodiment of the compensation method for a display panel provided in this invention.

[0040] Figure 3 A flowchart of another embodiment of the compensation method for a display panel provided in this invention.

[0041] Figure 4 This is an arrangement diagram of the first display section and the second display section in the target panel provided in an embodiment of the present invention.

[0042] Figure 5 Another arrangement diagram of the first display section and the second display section in the target panel provided in the embodiment of the present invention.

[0043] Figure 6 A flowchart of another embodiment of the compensation method for a display panel provided in this invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] In the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. Furthermore, it should be noted that the accompanying drawings only provide structures closely related to the invention, omitting some details less relevant to the invention. The purpose is to simplify the drawings and make the inventive points clear at a glance, not to indicate that the actual device is identical to the accompanying drawings. Figure 1 It is identical, but this is not a limitation of the actual device.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase at various points in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] The present invention provides a compensation method for a display panel, the method including but not limited to the following embodiments and combinations thereof.

[0048] In one embodiment, such as Figure 2 As shown, the compensation method for the display panel includes, but is not limited to, the following steps.

[0049] S1, the first display section of the control target panel displays a light-loaded image based on a standard gamma curve. In the light-loaded image, the sub-pixels of the corresponding N1th row that are electrically connected to the first data line are displayed under the first preset gray level, and the sub-pixels of the corresponding (N1+1)th row are displayed under the first gray level, where N1 is a positive integer.

[0050] Each sub-pixel in each display panel can have a corresponding gamma curve, and all sub-pixels can correspond to the same gamma curve. Specifically, the horizontal axis of the gamma curve represents the grayscale value of the corresponding sub-pixel in the target panel, and the vertical axis represents the brightness value of the sub-pixel when it emits light under the influence of the voltage value. It can be considered that the relationship between brightness value and grayscale value differs in different gamma curves. In particular, the gamma curve corresponding to the relationship between brightness value and grayscale value set based on human eye habits is called the standard gamma curve. That is, in the standard gamma curve, each brightness value and its change conforms to the corresponding grayscale value and its change as perceived by the human eye, and represents the brightness value and its change that the human eye should possess.

[0051] It should be noted that the target panel before step S1 can be considered to not meet the standard gamma curve. That is, at least in the first display part of the target panel at this time, the gamma curve of at least one sub-pixel is different from the standard gamma curve. In other words, the relationship between the brightness value of the sub-pixel and the grayscale value acting on the sub-pixel does not conform to the perception of the human eye.

[0052] Understandably, in step S1 of this embodiment, on the one hand, the first display unit can be controlled to display a light-loaded image; on the other hand, in conjunction with the definition of "standard gamma curve" above, the relationship between the brightness value of at least one sub-pixel (or all sub-pixels) in the light-loaded image presented by the first display unit and the grayscale value acting on that sub-pixel can conform to human eye perception. At least compared with the above relationship in the light-loaded images presented by other display units in the target panel, it is equivalent to improving the defect of brightness standards that do not conform to human eye perception.

[0053] Furthermore, in this embodiment, at least two adjacent rows of sub-pixels connected to the first data line in the light-load screen are displayed at the first preset grayscale and the first grayscale, respectively.

[0054] Among them, such as Figure 6 As shown, step S1 may include, but is not limited to, the following steps.

[0055] S101, based on the difference between the standard gamma curve and the original gamma curve of the first display, determine the third compensation data of the first display.

[0056] In conjunction with the above discussion, the target panel before step S1 can be considered to not meet the standard gamma curve. That is, the gamma curve of the target panel at this time that does not meet the standard gamma curve is the original gamma curve of the first display unit in step S101.

[0057] Specifically, based on the definition of gamma curves above, the standard gamma curve and the original gamma curve will differ in their ordinate (brightness value of the sub-pixel under the voltage value) at the same horizontal axis (the grayscale value of the corresponding sub-pixel). This difference can be used to adjust the corresponding grayscale value in the original gamma curve to make the corresponding brightness value closer to or even equal to the brightness value in the standard gamma curve. The difference between the adjusted horizontal axis and the original horizontal axis (i.e., the difference in grayscale values) can then be recorded as the corresponding third sub-compensation data. Furthermore, for each brightness value in the standard gamma curve, the corresponding voltage value in the original gamma curve can be adjusted using a corresponding third sub-compensation data to make the adjusted brightness value closer to or even equal to that brightness value in the standard gamma curve. This process continues, with multiple third sub-compensation data points forming the third compensation data.

[0058] Among them, the standard gamma curve can be a gamma curve obtained by adjusting a standard panel that is different from the target panel, and that conforms to the corresponding grayscale values ​​and the corresponding grayscale value changes as perceived by the human eye. Compared with the target panel, the standard panel can be considered to have eliminated other adverse factors, that is, it is close to the ideal panel.

[0059] S102, based on the third compensation data, control the first display unit to display the light load screen.

[0060] Specifically, the grayscale value (i.e., voltage value) of the sub-pixels in the first display unit can be adjusted according to the second sub-compensation data corresponding to each brightness value in the second compensation data to achieve a light-load image that conforms to the standard gamma curve.

[0061] S2, control the second display unit of the target panel to display a reloaded image. The second display unit is located on at least one side of the first display unit. In the reloaded image, the sub-pixels of the corresponding N2 row electrically connected to the second data line are displayed in the second preset grayscale, and the sub-pixels of the corresponding (N2+1) row are displayed in the first grayscale. N2 is a positive integer. N2 and N1 are equal or unequal. The first data line and the second data line are the same or different. The sub-pixels of the (N1+1) row and the sub-pixels of the (N2+1) row are both first color sub-pixels.

[0062] Specifically, the target panel can be an OLED display panel or a liquid crystal display panel. In an OLED display panel, sub-pixels emit light through self-emissive devices driven by voltage or current. The brightness of the sub-pixels is related to the current or voltage flowing through the self-emissive devices and the duration of the current or voltage application. In a liquid crystal display panel, sub-pixels emit light through a backlight source passing through a liquid crystal layer. The transmittance of the liquid crystal layer is related to the voltage applied across the liquid crystal layer. The light emitted by the backlight source is related to the current or voltage flowing through the backlight source and the duration of the current or voltage application.

[0063] It's important to note that, at least for LCD panels, because liquid crystal deflection takes time, if the display data of a sub-pixel in one row connected to the same data line differs from that of the sub-pixels in the previous row (at least two sub-pixels in the same column need to have different display data), when the voltage across the multiple liquid crystal molecules corresponding to that row's sub-pixel is exactly equal to the voltage corresponding to the grayscale value, it may not be able to deflect at the corresponding angle to achieve the appropriate brightness within the charging time of that row's sub-pixel. This results in uneven charging and display within the corresponding frame. Alternatively, the deflection of the liquid crystal molecules corresponding to two adjacent sub-pixels in the same row with different display data will also affect each other, causing a similar problem of uneven charging and display.

[0064] Here, "lightly loaded screen" and "heavily loaded screen" are two comparable concepts. Referring to the above discussion, a lightly loaded screen, compared to a heavily loaded screen (not limited to LCD panels), can be understood as having smaller differences in the display data of adjacent rows or columns of sub-pixels, or fewer rows or columns of sub-pixels with differing display data. Therefore, based on the above discussion, under the same conditions, a heavily loaded screen, compared to a lightly loaded screen, can be considered more likely to exhibit problems such as uneven brightness caused by the time required for liquid crystal deflection, as mentioned above.

[0065] It should be noted that since the problem of uneven display brightness is essentially caused by the sudden change in the data signal transmitted on the same data line, resulting in insufficient charging of the sub-pixels in the next row, this embodiment does not limit whether the specific colors of the sub-pixels in the (N1+1)th row and the sub-pixels in the (N2+1)th row are the same.

[0066] Based on the above discussion, this embodiment further limits that at least two adjacent rows of sub-pixels connected to the second data line in the heavy load screen are displayed at the second preset gray level and the first gray level, respectively. Here, the sub-pixels in the (N1+1)th row and the sub-pixels in the (N2+1)th row are both first color sub-pixels. According to the comparison of "light load screen and heavy load screen" above, it can be considered that the first preset gray level corresponding to the light load screen is closer to the first gray level than the second preset gray level corresponding to the heavy load screen. That is, when the objects are all first color sub-pixels, the problem of uneven display brightness in the light load screen is weaker than that in the heavy load screen.

[0067] S3, obtain the first brightness of the first sub-pixel of the first display unit that is electrically connected to the first data line in the (N1+1)th row.

[0068] The target panel may include sub-pixels of at least one color, for example, it may include sub-pixels of a first color. Specifically, in conjunction with the discussion in step S1, the first display unit displays a lightly loaded image based on a standard gamma curve. That is, the first brightness can be understood as not easily displayed or not having the problem of uneven display brightness caused by the time required for liquid crystal deflection as mentioned above, and also not having the defect of brightness that does not conform to human eye perception. That is, the first brightness can be used as a reference standard to improve the problem of uneven display during charging.

[0069] Furthermore, to improve the reference value of the first brightness, the first preset grayscale can be set to be equal to the first grayscale, which means that the first brightness can be considered to have no problem with uneven charging display.

[0070] S4, obtain the second brightness of the first color sub-pixel of the first sub-display unit in the second display unit that is electrically connected to the second data line in the (N2+1)th row.

[0071] In conjunction with the above discussion, both the first sub-display units in the first display unit and the second display unit can include first color sub-pixels, and the color and first grayscale of the first color sub-pixels are not limited here. Specifically, as discussed in step S4, since the first sub-display units in the first display unit and the second display unit respectively display light-load and heavy-load images, the difference between the theoretical brightness of the first color sub-pixel in the first display unit at the first preset grayscale and the current first brightness should be less than the difference between the theoretical brightness of the first color sub-pixel in the first sub-display unit at the second preset grayscale and the current second brightness. The first brightness presented by the sub-pixel of the first display unit is closer to the "theoretically corresponding brightness" than the second brightness presented by the sub-pixel of the first sub-display unit, and therefore can be used as a brightness standard to improve the problem of uneven charging display.

[0072] It should be noted that the specific order of steps S1 to S4 is not limited as described above in this embodiment. For example, steps S1 and S3 can be executed in sequence first, followed by steps S2 and S4 in sequence.

[0073] Furthermore, in step S1, the multiple sub-pixels in the N1th row of the light-loaded image are displayed under the first preset grayscale, and the multiple first color sub-pixels in the corresponding (N1+1)th row are displayed under the first grayscale; based on this, step S3 may include, but is not limited to, the following steps: obtaining multiple first actual brightness corresponding to the multiple first color sub-pixels in the (N1+1)th row of the first display part, and calculating the average value of the multiple first actual brightness as the first brightness.

[0074] Understandably, in this embodiment, the multiple sub-pixels displayed under the first preset grayscale are the N1th row, and the multiple first color sub-pixels displayed under the first grayscale are the (N1+1)th row. In order to improve the accuracy of the first brightness measurement, this embodiment takes the average value of the multiple first actual brightness corresponding to the multiple first color sub-pixels displayed under the first grayscale as the first brightness, taking into account the multiple first actual brightness corresponding to the multiple sub-pixels.

[0075] Similarly, in the reloaded image, multiple sub-pixels in the N2 row are displayed under the second preset grayscale, and the corresponding multiple first color sub-pixels in the (N2+1) row are displayed under the first grayscale; based on this, step S4 may include, but is not limited to, the following steps: obtaining multiple second actual brightness corresponding to the multiple first color sub-pixels in the (N2+1) row of the first sub-display, and calculating the average value of the multiple second actual brightness as the second brightness.

[0076] Similarly, in this embodiment, the average value of the multiple brightness values ​​corresponding to the multiple first color sub-pixels displayed in the (N2+1)th row under the first grayscale is taken as the second actual brightness value. By comprehensively considering the multiple second actual brightness values ​​corresponding to the multiple sub-pixels, the accuracy of the second brightness measurement is improved.

[0077] S5, based on the difference between the first brightness and the second brightness, determine the first compensation data of the first color sub-pixel of at least the first sub-display portion in the target panel corresponding to the first gray level and the second preset gray level.

[0078] Specifically, in conjunction with the above discussion of steps S1 to S4, since the first brightness corresponds more to the standard gamma curve and light-load screen than the second brightness, the difference between the first brightness and the second brightness can also include the difference between the non-standard gamma curve and the standard gamma curve, and the difference between the light-load screen and the heavy-load screen. Therefore, the first compensation data for the sub-pixels of the target panel corresponding to the second brightness, determined based on this difference, can at least be used to compensate for the defect of the sub-pixels of the target panel displaying the second brightness under the first gray level. This "brightness" can be understood as follows: in step S4, among two adjacent sub-pixels in the same column (i.e. connected to the same data line) corresponding to two different gray level values, the first color sub-pixel that receives the display data later and corresponds to the first gray level has a brightness defect. The first compensation data can simultaneously improve the brightness unevenness defect of at least the first sub-display part of the target panel caused by the above gray level changes due to the lack of brightness standard perceived by the human eye and uneven charging display, thus avoiding the need to store at least two sets of data to improve the above defects separately and reducing the cost of the display panel.

[0079] Similarly, this embodiment can also be applied to display panels with self-emissive devices, including but not limited to OLED display panels, because the brightness standard perceived by the human eye needs to be considered in any display panel, and the sub-pixels generally need to emit light under the drive of the corresponding pixel driving circuit. Furthermore, when the display data on the same data line changes, a series of problems with inaccurate voltages acting on the sub-pixels are caused by coupling capacitors or storage capacitors. In this embodiment, these problems can all be improved simultaneously by, for example, the first compensation data.

[0080] As discussed above, the first preset grayscale can be equal to the first grayscale, meaning that in the lightly loaded image displayed on the first display unit, the first color sub-pixel in row (N1+1) does not have a brightness defect caused by insufficient pixel density. However, in the heavily loaded image displayed on the first sub-display unit of the second display unit, the first color sub-pixel in row (N2+1) does not have a brightness defect caused by insufficient pixel density.

[0081] Therefore, in conjunction with the above discussion of step S5, the difference between the first brightness and the second brightness also includes the difference between the non-standard gamma curve and the standard gamma curve. In this embodiment, for example, the first compensation data can be used to simultaneously improve the uneven brightness of the first color sub-pixel in the target panel caused by the above grayscale changes due to the fact that it does not conform to the brightness standard perceived by the human eye and the uneven charging display.

[0082] In one embodiment, in the overloaded image, the sub-pixel of the N3rd row corresponding to the third data line is displayed at a third preset grayscale, and the first color sub-pixel of the (N3+1)th row is displayed at a second grayscale. The third preset grayscale and the second preset grayscale are the same or different, and / or the second grayscale and the first grayscale are the same or different. N3, N2, and N1 are all equal or unequal, and the first data line, the second data line, and the third data line are the same or different. Based on this, as... Figure 3 As shown, the compensation method for the display panel also includes, but is not limited to, the following steps.

[0083] S6, obtain the third brightness of the first color sub-pixel of the second sub-display unit electrically connected to the third data line in the (N3+1)th row of the second display unit, the third brightness being different from the second brightness.

[0084] Furthermore, as discussed in step S6, this embodiment further defines the brightness difference between two adjacent sub-pixels in the second sub-display unit as different from the brightness difference between two adjacent sub-pixels in the first sub-display unit. For example, it can be greater than or less than the brightness difference between two adjacent sub-pixels in the first display unit. That is, the first sub-display unit and the second sub-display unit can be two different display units in the second display unit, and the difference between the two is that the first color sub-pixel emits light at the first grayscale with a second brightness and a third brightness that are greater than the first brightness and different from each other. The reasons for the difference between the third brightness and the first brightness can be referred to the following two aspects:

[0085] Firstly, it can be understood by referring to the relevant discussion above regarding the reasons for the difference between the second brightness and the first brightness. That is, it can be understood as the brightness difference caused by the gray level jump between two adjacent sub-pixels. As shown in Table 1, gray level 1 can represent the third preset gray level when the sub-pixel in the N2 or N3 row is displayed, and gray level 2 can represent the second gray level when the first color sub-pixel in the (N2+1) or (N3+1) row is displayed.

[0086] Here, we take the example of the third preset gray level and the second preset gray level being different, and the second gray level being the same as the first gray level, to illustrate this. That is, the starting point of the gray level transition is different but the ending point is the same. For example, for the same first gray level (i.e., gray level 2, for example, 8), we can consider that the gray level 1 (e.g., equal to 4) of the sub-pixel in the N2 row that causes the second brightness is different from the gray level 1 (e.g., equal to 244) of the sub-pixel in the N3 row that causes the third brightness.

[0087] Table 1

[0088]

[0089] Secondly, it can be assumed that the distance between the first sub-display unit and the second sub-display unit is relatively large, for example, there are multiple sub-pixels between the second sub-display unit and the first sub-display unit. For ease of comparison, this is explained here as an example where the third preset gray level and the second preset gray level are the same, and the second gray level and the first gray level are the same, that is, the starting point and the ending point of the gray level transition are the same. For example, for the same first gray level (that is, the second gray level, i.e., gray level 2, for example, 8), even if the gray level 1 (4) of the sub-pixel in the N2 row that causes the third brightness is the same as the gray level 1 (4) of the sub-pixel in the N3 row that causes the second brightness, the distance between the first sub-display unit and the second sub-display unit is relatively large, which will also cause a difference between the second brightness and the third brightness.

[0090] Specifically, the second sub-display unit and the first sub-display unit can be arranged adjacent to each other. Based on the above discussion, since the distance between the second and first sub-display units is small, their brightness will not differ due to distance. Furthermore, if the third preset grayscale is the same as the second preset grayscale, and the second grayscale is the same as the first grayscale, the second brightness can be considered equal to the third brightness. This eliminates the need to divide the display into two units for brightness difference measurement, saving at least step S6.

[0091] S7, based on the difference between the first brightness and the third brightness, determine the second compensation data of the first color sub-pixel of at least the second sub-display portion in the target panel corresponding to the second gray level and the third preset gray level.

[0092] Specifically, since the third brightness and the second brightness will differ due to the aforementioned reasons, the first compensation data and the second compensation data determined based on their respective differences from the first brightness can be used to compensate for the defects of the first color sub-pixel of the first sub-display portion in the target panel displaying at the second brightness and the defects of the first color sub-pixel of the second sub-display portion in the target panel displaying at the third brightness, respectively. Step S7 can be referred to the relevant description of step S5.

[0093] Continuing with the example from the first aspect above, for ease of comparison, we take the case where the second sub-display unit and the first sub-display unit are adjacent or identical (i.e., there is no need to consider the brightness difference caused by distance). When the first gray level is equal to the second gray level (i.e., gray level 2, for example, 8), and the second preset gray level (e.g., gray level 1 equals 4) is different from the third preset gray level (e.g., gray level 1 equals 244), then the corresponding first compensation data and second compensation data for the second sub-display unit and the first sub-display unit can be X32 and X(n-2)2, respectively. Furthermore, when the third preset gray level and the second preset gray level are the same, and the second gray level and the first gray level are the same, it can be considered that the second brightness is equal to the third brightness. In this case, steps S6 to S7 can be omitted, that is, the first compensation data can be used simultaneously to compensate for the defect that the first color sub-pixel in the second sub-display unit and the first sub-display unit is displayed as the second brightness (i.e., the third brightness).

[0094] Specifically, such as Figure 5 As shown, the second display unit A2 may include, for example, a first sub-display unit A21 and a second sub-display unit A22 arranged in a concentrated manner, and may also include a third sub-display unit A23 and a fourth sub-display unit A24. Furthermore, in the four sub-display units (A21, A22, A23, and A24) of the second display unit A2, the grayscale values ​​of the sub-pixels in the first row connected to the same data line in adjacent rows can be different, while the grayscale values ​​of the first color sub-pixels in the second row can be the same (for example, the first preset grayscale in the first sub-display unit A21 is not equal to the second preset grayscale in the second sub-display unit A22). For example, the value corresponding to "grayscale 2" in the four sub-display units (A21, A22, A23, and A24) can all be equal to 64, and the values ​​corresponding to "grayscale 1" can be 0, 35, 224, and 225, respectively. In this case, combined with the relevant discussion on steps 5 and S7 above, four compensation data corresponding to the four grayscale transitions (0 to 64, 35 to 64, 224 to 64, and 225 to 64) of the first color sub-pixels in the second display unit A2 can be obtained.

[0095] Continuing with the example in the second aspect above, for a first gray level equal to a second gray level (i.e., gray level 2, for example, 8), and a second preset gray level equal to a third preset gray level (i.e., gray level 1, for example, 244), but when the interval between the second sub-display unit and the first sub-display unit is large, it should be noted that the second brightness and the third brightness will also be different. Therefore, the corresponding first compensation data (X32 in table 1) and second compensation data (X32 in another table 1) will also be different. In summary, due to the large interval between the second sub-display unit and the first sub-display unit, any set of gray levels 2 and 1 will map unequal first compensation data and second compensation data, thus forming two sets of Table 1.

[0096] Specifically, such as Figure 4 As shown, for example, the second display unit A2 may include a first sub-display unit A21 and a second sub-display unit A22 that are spaced far apart. Furthermore, both the first sub-display unit A21 and the second sub-display unit A22 may each include at least a second color sub-pixel P2 of a different color than a first color sub-pixel P1. Similarly, the second color sub-pixel P2 in the first sub-display unit A21 and the second sub-display unit A22 can also be combined with the discussion in steps S1 to S7 to obtain corresponding Table 1s. In particular, when the first color sub-pixel P1 is a green sub-pixel, furthermore, Table 1 for other color sub-pixels in the first sub-display unit A21 and the second sub-display unit A22 that are different from the green sub-pixel (i.e., P1) can be the same as Table 1 for the green sub-pixel (i.e., P1) in the first sub-display unit A21 and the second sub-display unit A22.

[0097] Of course, it should be noted that, as shown in Table 1, when gray level 1 is equal to gray level 2, it means that the gray level values ​​of two adjacent rows of sub-pixels connected to the same data line in the above embodiment are the same, which means that a light-loaded image can be formed. At this time, there is no need to compensate for the defects caused by the heavy-loaded image, but only to compensate for the defects that do not conform to the brightness standard perceived by the human eye. That is, the corresponding multiple first compensation data (second compensation data) can only compensate for the defects that do not conform to the brightness standard perceived by the human eye.

[0098] In this embodiment, the relative positions of the first display unit A1 and the second display unit A2 are not limited, and they can be considered to have no overlap. Furthermore, the first display unit A1 can be considered to be closer to the center of the target panel than the second display unit A2. Figure 4 and Figure 5 As shown, the first display unit A1 may include the center position of the target panel 10, and the second display unit A2 may be a display unit other than the display area A of the target panel, that is, the second display unit A2 may be arranged around the first display unit A1.

[0099] The present invention also provides a compensation method for a display panel, wherein the display panel includes multiple rows of sub-pixels, each row of sub-pixels being a first color sub-pixel, a second color sub-pixel, or a third color sub-pixel, and the multiple rows of sub-pixels are arranged cyclically in the column direction in the order of the second color sub-pixel, the third color sub-pixel, and the first color sub-pixel, such as... Figure 6 As shown, the compensation method for the display panel may include, but is not limited to, the following steps.

[0100] S01, the first display section of the control target panel displays a light-loaded image based on a standard gamma curve, wherein the second color sub-pixel, the third color sub-pixel, and the first color sub-pixel in the light-loaded image are all displayed at the first test grayscale.

[0101] Understandably, the difference from the above embodiment is that in this embodiment, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel in the light-load screen all emit light at the same gray level (first test gray level). That is, the multiple sub-pixels connected to each data line are displayed at the same gray level (first test gray level), and there is no jump in the data voltage on each data line. It can be considered that there is no problem of uneven display brightness as mentioned above, which is also consistent with the above discussion on "light-load screen".

[0102] S02, control the second display unit of the target panel to display a reloaded image. The second display unit is located on at least one side of the first display unit. In the reloaded image, the second color sub-pixel and the third color sub-pixel are both displayed under the second test grayscale, and the first color sub-pixel is displayed under the first test grayscale.

[0103] Understandably, corresponding to step S01, all sub-pixels in the reloaded screen also emit light at this time. Unlike step S01, the second color sub-pixel and the third color sub-pixel in the second display unit are displayed under the second test grayscale. That is, among the multiple sub-pixels connected by each data line, the grayscale changes from the third color sub-pixel to the first color sub-pixel (the second test grayscale becomes the first test grayscale). The data voltage on each data line jumps, which can be considered as a problem of uneven display brightness, which is also consistent with the above discussion on "reloaded screen".

[0104] S03, obtain the first test brightness of the first color sub-pixel in the first display unit.

[0105] Based on the discussion in step S01, we can first obtain the brightness of all the first color sub-pixels in the first display unit when displayed under the first test grayscale in a light-loaded screen, which is the sum of the brightness of all the first color sub-pixels; furthermore, we can calculate the average brightness of all the first color sub-pixels as the first test brightness.

[0106] S04, obtain the second test brightness of the sub-pixel of the first sub-display portion in the second display portion.

[0107] Based on the discussion in step S02, we can first obtain the brightness of all the first color sub-pixels in the first sub-display unit when displayed in the first test grayscale under the overloaded screen, which is the sum of the brightness of all the first color sub-pixels; further, we can calculate the average value of the brightness of all the first color sub-pixels as the second test brightness.

[0108] S05, based on the difference between the first test brightness and the second test brightness, determine the fourth compensation data corresponding to the first color sub-pixel of at least the first sub-display portion in the target panel and the first test grayscale and the second test grayscale.

[0109] The present invention also provides a compensation device that can be used to perform the compensation method for the display panel as described in any of the above descriptions.

[0110] The present invention also provides a display panel, comprising: a processor configured to compensate the brightness of the sub-pixels of the first sub-display portion according to the first compensation data and / or the fourth compensation data determined by the compensation method of the display panel described above. For example, the processor may combine Table 1 to perform corresponding compensation based on grayscale 1, grayscale 2 and the mapped first compensation data, thereby simultaneously improving the brightness unevenness defects of the sub-pixels of at least the first sub-display portion in the target panel caused by the above grayscale changes due to two reasons: not conforming to the brightness standard perceived by the human eye and uneven charging display.

[0111] Furthermore, the display panel may also include a memory for storing the first compensation data and / or the fourth compensation data determined according to the compensation method of the display panel as described above.

[0112] This invention provides a compensation device, a display panel, and a compensation method thereof. By controlling a first display section of a target panel to display a lightly loaded image based on a standard gamma curve, and controlling a second display section of the target panel to display a heavily loaded image, the invention acquires the first brightness of the first color sub-pixel of the first display section electrically connected to the first data line in the (N1+1)th row, and the second brightness of the first color sub-pixel of the first sub-display section of the second display section electrically connected to the second data line in the (N2+1)th row. Based on the difference between the first brightness and the second brightness, the invention determines first compensation data corresponding to the first grayscale and the second preset grayscale for the first color sub-pixel of at least the first sub-display section in the target panel. In other words, this invention can simultaneously improve the uneven brightness caused by two factors—non-compliance with human visual perception of brightness standards and uneven charging / display—when at least the first sub-display section of the target panel is subjected to the above grayscale changes (causing brightness changes, ending at the second brightness). This avoids storing at least two sets of data to separately improve the aforementioned defects, thus reducing the cost of the display panel.

[0113] The compensation device, display panel, and compensation method provided in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. 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 the present invention.

Claims

1. A compensation method for a display panel, characterized in that, include: The first display section of the control target panel displays a light-loaded image based on a standard gamma curve. In the light-loaded image, the sub-pixels of the corresponding N1th row that are electrically connected to the first data line are displayed under the first preset gray level, and the sub-pixels of the corresponding (N1+1)th row are displayed under the first gray level, where N1 is a positive integer. The second display unit of the target panel is controlled to display a reloaded image. The second display unit is located on at least one side of the first display unit. In the reloaded image, the sub-pixels of the corresponding N2 row that are electrically connected to the second data line are displayed in the second preset grayscale, and the sub-pixels of the corresponding (N2+1) row are displayed in the first grayscale. N2 is a positive integer. N2 and N1 are equal or unequal. The first data line and the second data line are the same or different. The sub-pixels of the (N1+1) row and the sub-pixels of the (N2+1) row are both first color sub-pixels. Obtain the first brightness of the first color sub-pixel of the first display unit that is electrically connected to the first data line in the (N1+1)th row; Obtain the second brightness of the first color sub-pixel of the first sub-display unit electrically connected to the second data line in the (N2+1)th row of the second display unit; Based on the difference between the first brightness and the second brightness, it is determined that the first color sub-pixel in at least the first sub-display portion of the target panel corresponds to the first grayscale and the second preset grayscale as first compensation data. In the reloaded image, the sub-pixel of the N3rd row corresponding to the one electrically connected to the third data line is displayed at a third preset grayscale, and the first color sub-pixel of the (N3+1)th row is displayed at a second grayscale. The third preset grayscale and the second preset grayscale are the same or different, and / or the second grayscale and the first grayscale are the same or different. N3, N2, and N1 are all equal or unequal. The first data line, the second data line, and the third data line are the same or different. The method further includes: The third brightness of the first color sub-pixel of the second sub-display unit electrically connected to the third data line in the second display unit is obtained, and the third brightness is different from the second brightness; Based on the difference between the first brightness and the third brightness, the second compensation data corresponding to the second grayscale and the third preset grayscale is determined for the first color sub-pixel of at least the second sub-display portion in the target panel.

2. The compensation method for the display panel as described in claim 1, characterized in that, The first preset gray level is equal to the first gray level.

3. The compensation method for the display panel as described in claim 1, characterized in that, The second sub-display unit and the first sub-display unit are arranged adjacent to each other.

4. The compensation method for the display panel as described in claim 1, characterized in that, The second sub-display portion and the first sub-display portion have a plurality of said sub-pixels.

5. The compensation method for a display panel as described in any one of claims 1 to 4, characterized in that, In the light-loaded image, multiple sub-pixels in the N1th row are displayed under the first preset grayscale, and the corresponding multiple first-color sub-pixels in the (N1+1)th row are displayed under the first grayscale. In the reloaded image, multiple sub-pixels in the N2th row are displayed under the second preset grayscale, and the corresponding multiple first color sub-pixels in the (N2+1)th row are displayed under the first grayscale; The step of obtaining the first brightness of the first color sub-pixel of the first display unit electrically connected to the first data line in the (N1+1)th row includes: Obtain multiple first actual brightness values ​​corresponding to multiple first color sub-pixels in the (N1+1)th row of the first display unit, and calculate the average value of the multiple first actual brightness values ​​as the first brightness value; The step of obtaining the second brightness of the first color sub-pixel of the first sub-display unit electrically connected to the second data line in the (N2+1)th row of the second display unit includes: Obtain multiple second actual brightness values ​​corresponding to multiple first color sub-pixels in the (N2+1)th row of the first sub-display section, and calculate the average value of the multiple second actual brightness values ​​as the second brightness value.

6. The compensation method for a display panel as described in any one of claims 1 to 4, characterized in that, The step of displaying a light-load image on the first display section of the control target panel based on a standard gamma curve includes: Based on the difference between the standard gamma curve and the original gamma curve of the first display, the third compensation data of the first display is determined; Based on the third compensation data, the first display unit is controlled to display the light load screen.

7. A compensation method for a display panel, characterized in that, The display panel includes multiple rows of sub-pixels, each row of sub-pixels being a first color sub-pixel, a second color sub-pixel, or a third color sub-pixel. The multiple rows of sub-pixels are arranged cyclically in the column direction in the order of the second color sub-pixel, the third color sub-pixel, and the first color sub-pixel. The method includes: The first display section of the control target panel displays a light load image based on a standard gamma curve. In the light load image, the second color sub-pixel, the third color sub-pixel, and the first color sub-pixel in the corresponding N1 row that are electrically connected to the first data line are all displayed under the first test grayscale. The second display unit of the target panel is controlled to display a reloaded image. The second display unit is located on at least one side of the first display unit. In the reloaded image, the second color sub-pixel and the third color sub-pixel of the corresponding N2 row electrically connected to the second data line are both displayed under the second test grayscale. The first color sub-pixel of the N2 row is displayed under the first test grayscale. The sub-pixel of the (N1+1) row and the sub-pixel of the (N2+1) row are both the first color sub-pixel. Obtain the first test brightness of the first color sub-pixel in the first display unit; Obtain the second test brightness of the sub-pixel of the first sub-display portion in the second display portion; Based on the difference between the first test brightness and the second test brightness, the fourth compensation data corresponding to the first color sub-pixel of at least the first sub-display portion in the target panel is determined to be that the first color sub-pixel corresponds to the first test grayscale and the second test grayscale. In the reloaded image, the sub-pixel of the N3rd row corresponding to the third data line is displayed at a third preset grayscale, and the first color sub-pixel of the (N3+1)th row is displayed at a second grayscale. The third preset grayscale and the second test grayscale are the same or different, and / or the second grayscale and the first test grayscale are the same or different. N3, N2, and N1 are all equal or unequal. The first data line, the second data line, and the third data line are the same or different. The method further includes: The third brightness of the first color sub-pixel of the second sub-display unit electrically connected to the third data line in the second display unit is obtained, and the third brightness is different from the second test brightness; Based on the difference between the first test brightness and the third brightness, the second compensation data corresponding to the second grayscale and the third preset grayscale is determined for the first color sub-pixel of at least the second sub-display portion in the target panel.

8. A compensation device, characterized in that, Used to perform the compensation method for the display panel as described in any one of claims 1 to 7.

9. A display panel, characterized in that, include: The processor is configured to compensate for the brightness of at least the sub-pixels in the first sub-display portion according to the first compensation data determined by the compensation method of the display panel as claimed in any one of claims 1 to 6, and / or the fourth compensation data determined by the compensation method of the display panel as claimed in claim 7.

10. The display panel as claimed in claim 9, characterized in that, Also includes: A memory for storing compensation data determined by the compensation method of the display panel.

Images