Display panel brightness display method and display device

Abstract

The present application discloses a display panel brightness display method and a display device thereof, comprising determining the number of standard brightness data tables stored in the display panel; determining the number of standard pixels contained in each standard brightness data table; obtaining the number of complete pixels that the display unit to be displayed needs to display; comparing the number of complete pixels that the display unit needs to display with the number of standard pixels in the standard brightness data table, and calling the standard brightness data table corresponding to the number of complete pixels that the display unit needs to display. The method can solve the display unevenness problem caused by crosstalk, line resistance loss, etc., and the method is simple to display and can reduce the power consumption waste caused by complex calculations of the device.

Description

Technical Field

[0001] The present invention relates to the field of display, and in particular to a display panel brightness display method and a display device. Background Art

[0002] The continuous development of information technology has made displays ubiquitous, and display panels have become the core components of electronic products. The brightness of a display panel is closely related to the driving current of its display device. In addition, the display field has increasingly larger requirements for product size. The larger the display panel size, the longer the layout line, and the greater the difference between different rows due to line process loss; on the other hand, the power consumption of the product needs to be lower and lower, that is, the luminous efficiency of the display device is required to be higher and higher. At the same time, the resolution of the required products is also gradually increasing. The increase in coupling and crosstalk in design and process will also aggravate the display differences between different rows.

[0003] A large number of practices have shown that the display effect of the display panel is highly correlated with the display algorithm. Currently, panel manufacturers and terminal manufacturers are studying display algorithms to improve the uniformity of display; the commonly used display methods are mostly to obtain data within a certain range and perform different weighted operations to display the data there; as the product size increases, the amount of data that needs to be calculated increases, which will cause the IC power consumption to increase. In addition, when the number of display rows is far apart, the improvement effect of this method is poor. Therefore, how to quickly improve the uniformity of the display module through the display algorithm without causing a large increase in power consumption is a technical problem that needs to be solved urgently in the display field. Summary of the invention

[0004] In order to solve the above technical problem, the present invention provides a panel display brightness display method.

[0005] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

[0006] A panel display brightness display method comprises the following steps: determining the number of standard brightness data tables stored in the display panel; determining the number of standard pixels contained in each standard brightness data table; obtaining the number of complete pixels required to be displayed by a to-be-displayed unit; comparing the number of complete pixels required to be displayed by the to-be-displayed unit with the standard brightness data table, and selecting to call the standard brightness data table according to the comparison result.

[0007] The standard brightness data table is stored in the display panel, and the standard brightness data is called by comparing the actual brightness of the display unit to be displayed on the display panel with the standard data, so as to achieve fast comparison and uniformity of display brightness.

[0008] In a possible implementation, if the number of complete pixels of the unit to be displayed is the same as the number of standard pixels in the corresponding standard brightness data table, the corresponding standard brightness data table is directly called.

[0009] In one possible implementation, obtaining the number of complete pixels that the unit to be displayed needs to display is to obtain the actual display brightness of all pixels in the current row or column, add up the actual display brightness of all pixels in the row or column, and then divide it by the grayscale of the display panel to obtain the number of complete pixels that the unit to be displayed needs to display.

[0010] In a possible implementation, the number of complete pixels required to be displayed by the display unit is compared with the standard brightness data table stored in the display panel, and the standard brightness data table corresponding to the number of complete pixels required to be displayed by the display unit is called.

[0011] In one possible implementation, the number of complete pixels that the display unit needs to display is compared with the standard brightness data table stored in the display panel. If the number of complete pixels that the display unit needs to display is above 3 / 4 of the maximum value of the corresponding standard brightness data table, the next standard brightness data table of the corresponding standard brightness data table is directly called.

[0012] In one possible implementation, the number of complete pixels that the display unit needs to display is compared with the standard brightness data table stored in the display panel. If the number of complete pixels that the display unit needs to display is less than 5 / 4 of the minimum value of the corresponding standard brightness data table, the previous standard brightness data table of the corresponding standard brightness data table is directly called.

[0013] In a possible implementation, it is determined that each standard brightness data table includes a corresponding number of standard pixels, wherein the number of standard pixels is obtained by dividing the total number of pixels of the units to be displayed by the number of standard brightness data tables stored in the display panel.

[0014] In a possible implementation, the standard brightness data table is stored in the display panel in a burned-in manner.

[0015] Another aspect of the present application provides a display device, including the display panel brightness display method as described above.

[0016] Furthermore, the display device includes a display panel, and the display panel is a PMOLED.

[0017] The display device provided in the embodiment of the present application may include a display panel brightness display method, the method including determining the number of standard brightness data tables stored in the display panel; determining the number of standard pixels contained in each standard brightness data table; obtaining the number of complete pixels that need to be displayed by the display unit of the display panel; comparing the number of complete pixels that need to be displayed by the display unit with the number of standard pixels in the standard brightness data table, and calling the standard brightness data table corresponding to the number of complete pixels that need to be displayed by the display unit.

[0018] By adopting the above technical solution, the deviation of pixel display in each area can be effectively reduced, thereby ensuring the uniformity of display. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only schematic diagrams of the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 This is a process of a display panel brightness display method according to an embodiment of the present application.

[0021] Figure 2 A schematic diagram of a standard brightness data table provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] As mentioned in the background art, when the driving currents at different positions of the display panel differ, the brightness will differ, and the uniformity of the displayed image will be very poor. In particular, the larger the size of the display panel, the greater the difference in the process loss of the corresponding lines, and the worse the brightness uniformity of the display panel.

[0024] The display effect of the display panel is highly correlated with the display algorithm. The commonly used display method is to obtain data within a certain range and perform different weighted operations to display the data in that area. However, as the product size increases, the existing display method requires more data to be calculated, which will increase the power consumption of the chip and make the improvement effect poor.

[0025] As mentioned above, due to various factors such as process loss, the brightness of different areas of the display panel varies. In order to achieve accurate display of the brightness of different areas, it is necessary to first determine the standard brightness data of the display panel in different areas and then store it in the display panel.

[0026] The brightness of a display panel is usually determined by grayscale, and different display panel brightnesses correspond to different grayscales.

[0027] The display panel includes x rows and y columns, each row includes y pixels in total, the display panel resolution includes the resolution in the x direction and the resolution along the y direction, and the final resolution of the display panel is x*y.

[0028] The display panel includes x rows and y columns, and each row includes a total of y pixels. If the brightness of y pixels needs to be displayed, then the standard brightness data needs to be determined for each pixel. If the standard data of each row of pixels corresponding to the y column pixels is called, a larger IC storage space is required. If the standard brightness data of the y column pixels is set to be the same, the IC storage space can become very small, but because the standard brightness of each column in the y column is different due to process loss, the required standard brightness is also different. If the standard brightness data is uniformly set to the same standard brightness data, the display effect will become very poor and cannot meet the requirements of the display panel.

[0029] Based on the above display problems, an embodiment of the present application provides a display panel brightness display method.

[0030] The following description is made by taking pixels in rows x and columns y and a row of pixels in a display panel with a gray scale of m as an example.

[0031] like Figure 1 , the first step is to determine the number of standard brightness data tables stored in the display panel. Specifically, the display panel includes x rows and y columns, each row includes a total of y pixels, and a standard brightness data table is formed for the y pixels. A display panel with x rows and y columns can store at least 1 data table and at most y data tables. In practice, the number of stored data tables can be selected between 1 and y according to actual conditions, such as the storage space of the memory chip. Exemplarily, the standard data brightness is selected to be y1 (y1 is greater than or equal to 1 and less than or equal to y).

[0032] like Figure 2 ,The second step is to determine the number of standard pixels contained in each standard brightness data table. Specifically, after determining the number of standard brightness data tables, y is divided by the number of standard brightness data tables, that is, the number of standard pixels contained in each data table. Each standard brightness data table contains the corresponding number of standard pixels and the code for calling the standard brightness data table.

[0033] like Figure 1,The third step is to determine the number of complete pixels that the display unit needs to display.

[0034] Description of the number of complete pixels that need to be displayed by the display unit. The grayscale of the display panel is m, which means that the brightness display range of each pixel includes 0 to m, where 0 grayscale means that the pixel is not bright; m grayscale means that the pixel is fully bright, that is, the pixel brightness displays the complete pixel brightness. In other words, not all pixels display the complete pixel brightness. At this time, it is necessary to convert the brightness of all pixels in the row, and convert the actual brightness displayed by the pixels in the row into the number of corresponding complete pixel brightness.

[0035] Explanation on converting the actual brightness displayed by the row of pixels into the number of equivalent complete pixel brightness. Specifically, the actual brightness displayed by all pixels in the row is summed up, and then divided by the grayscale coefficient, which is the grayscale minus 1, that is, the actual brightness displayed by the row of pixels is converted into the number of equivalent complete pixel brightness.

[0036] like Figure 1 ,The fourth step, based on the third step, obtain the number of complete pixels that need to be displayed in the current row and compare it with the number of standard pixels in the standard brightness data table in the second step, and call the corresponding data table.

[0037] The display panel brightness display method provided in the embodiment of the present application is described by taking one row of pixels of a display panel with a resolution of 150*300 and 16 gray levels as an example.

[0038] The first step, such as Figure 1 , assuming that the display panel can store 20 data tables of standard brightness. Of course, any number of data tables between 1-300 can be selected according to the actual situation. It should be noted that if the number of data tables is 300, a larger IC storage space is required. If the number of data tables is 1, the brightness of pixels with different losses will be displayed consistently, resulting in poor display effects. Generally speaking, a compromise can be made based on the display brightness requirements of the display panel.

[0039] The second step is, Figure 2 , determine the number of standard pixels contained in each standard brightness data table. Specifically, in the embodiment of the present application, each row has 300 sub-pixels, and the display panel stores 20 standard brightness data tables. Then, the number of pixels of full brightness that each data table needs to contain is 300 / 20, that is, 15 pixels. The 300 pixels are stored in standard brightness data table 1 to standard brightness data table 20 respectively.

[0040] After the standard brightness data is formed, it is stored in the driver IC of the display panel by burning.

[0041] The third step is to determine the number of complete pixels to be displayed in the row. Specifically, a row of a display panel with a resolution of 150*300 and a grayscale of 16 is used as an example for description.

[0042] Determine the number of complete pixels that need to be lit in this row. First, sum the actual brightness of all pixels in this row. Secondly, divide the sum of the brightness of all pixels in this row by the grayscale coefficient (the grayscale coefficient is the grayscale minus 1), and then convert it into the number of complete pixel brightnesses equivalent to the actual brightness of the pixels displayed in this row. Exemplarily, there are 300 pixels in this row. Assume that the number of pixels that do not need to be displayed in this row is 200, that is, the grayscale is 0, in other words, the number of pixels with a grayscale of 0 is 200; the number of pixels with a display brightness of 5 grayscale is 50, and the number of pixels with a display brightness of 10 grayscale is 50; then the number of pixels that need to be displayed in this row is: (200*0+5*50+10*50) / 15=50; that is, the number of pixels that need to be lit in this row is 50.

[0043] Step 4: Get the number of complete pixels to be displayed in the current row and compare it with the standard brightness data table. If the number of complete pixels to be displayed in the current row falls into one of the standard brightness data tables 1 to 20, the standard brightness data table is directly called.

[0044] Select the standard brightness data table corresponding to the number of pixels lit in the row in the standard brightness data image table, and directly call the data to light up the pixels in the row. Specifically, call the standard brightness data table through the code corresponding to the standard brightness data table.

[0045] The above calculation method is simple and direct. The standard brightness data table is stored in advance and can be quickly called for comparison, which can effectively save calculation time and calculation channels and is conducive to reducing the power consumption of the product.

[0046] Based on the above embodiment, the present application provides another embodiment. The first step, the second step and the third step of the present application are the same as those of the above embodiment, except that the calling method is different.

[0047] Specifically, after obtaining the number of complete pixels to be displayed in the current row according to the aforementioned embodiment, an additional step is performed to predict the number of complete pixels to be displayed and the corresponding standard brightness data table. After obtaining the number of complete pixels to be displayed in the current row, if it is in the corresponding standard brightness data table, but is in the upper limit range of the standard brightness data table, the standard brightness data table is no longer called, and the next standard brightness data table is directly called. Similarly, if its data is in the lower limit range of the corresponding standard brightness data table, the data table is no longer called, and the previous standard brightness data table of the data table is directly called.

[0048] It should be noted that the upper limit range of the embodiment of the present application is defined as more than 3 / 4 of the maximum number of standard pixels in the standard brightness data table; the lower limit range is defined as less than 5 / 4 of the minimum number of standard pixels in the standard brightness data table.

[0049] Let's continue with the product with a resolution of 150*300 as an example.

[0050] Assume that the number of complete pixels that need to be lit in a row is 28, and 28 has exceeded 3 / 4 of the maximum standard pixel number 30 in the standard brightness data table 2. At this time, instead of calling the code in the standard brightness data table 2, the code in the standard data table 3 is called for lighting; suppose that the number of complete pixels that need to be displayed in a row is 17, and 17 is lower than 5 / 4 of the minimum standard pixel value 16 in the standard brightness data table 2, the code in the standard brightness data table 1 is called for display.

[0051] Compared with the previous embodiment, this embodiment adds a new judgment process when calling the data table, so that the codes called for pixels with similar numbers are the same, the transition is smoother, and it is beneficial to the uniformity of display.

[0052] The display panel involved in this embodiment may be an organic electroluminescent display panel, such as PMOLED, AMOLED, or a liquid crystal display panel, or other types of display panels such as a quantum dot display panel.

[0053] Based on the same inventive concept, an embodiment of the present invention provides a display device, including the circuit for displaying data as described above.

[0054] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods, systems, or program products. Therefore, the embodiments of the present invention may be in the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. Moreover, the embodiments of the present invention may be in the form of machine program products implemented on one or more readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer / processor available program codes.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between various examples can be referenced to each other.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel brightness display method, characterized in that: include The display panel includes x rows and y columns, each row includes y pixels in total, determining the number of standard brightness data tables stored in the display panel, wherein the number of standard brightness data tables is y1, which is between 1 and y; determining the number of standard pixels contained in each of the standard brightness data tables, The standard number of pixels is obtained by dividing the total number of pixels of the display panel by the number of the standard brightness data table stored in the display panel; Obtain the number of complete pixels that the display unit needs to display; wherein the number of complete pixels is to obtain the actual display brightness of all pixels in the current row, add up the actual display brightness of all pixels in the current row, and then divide it by the grayscale coefficient, where the grayscale coefficient is the grayscale minus 1; The number of complete pixels is compared with the number of standard pixels, and the standard brightness data table is called according to the comparison result.

2. The display panel brightness display method according to claim 1, characterized in that: If the number of complete pixels is the same as the called standard brightness data table, the standard brightness data table is directly called.

3. The display panel brightness display method according to claim 1, characterized in that: The number of complete pixels is compared with the called standard brightness data table. If the number of complete pixels is greater than 3 / 4 of the maximum value of the called standard brightness data table, the next standard brightness data table of the corresponding standard brightness data table is directly called.

4. The display panel brightness display method according to claim 1, characterized in that: The number of complete pixels is compared with the called standard brightness data table. If the number of complete pixels is less than 5 / 4 of the minimum value of the called standard brightness data table, the previous standard brightness data table of the corresponding standard brightness data table is directly called.

5. The display panel brightness display method according to claim 1, characterized in that: The standard brightness data table is stored in the display panel in a burned-in manner.

6. A display device, characterized in that: It includes a display panel brightness display method as described in any one of claims 1 to 5.

7. The display device according to claim 6, characterized in that: The display panel is a PMOLED.

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