Driving data acquisition method, driving method and driving circuit, and display device

Abstract

This application relates to a driving data acquisition method, a driving method and driving circuit, and a display device. The driving data acquisition method includes: dividing a display area into multiple sub-display areas; adjusting a data voltage to its maximum value to give the sub-display areas a high brightness; adjusting a cathode voltage to give the sub-display areas a first brightness not lower than the high brightness, and acquiring a first cathode voltage for the sub-display areas corresponding to the first brightness; adjusting the cathode voltage to give the sub-display areas a second brightness not lower than the high brightness, and acquiring a second cathode voltage for the sub-display areas corresponding to the second brightness; and fitting a driving relationship between the display brightness of the sub-display areas and the cathode voltage. The driving data acquisition method of this application can adjust the cathode voltages of different sub-display areas according to the driving relationship, so that their display brightness meets the display requirements, improving the display effect of the display panel and making it more adaptable.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a method for acquiring driving data, a driving method and driving circuit, and a display device. Background Art

[0002] With the development of display technology, OLED (Organic Light Emitting Display) display panels have been widely used due to their advantages such as being thinner and lighter, brighter, having lower power consumption, faster response, and higher resolution.

[0003] In the use of OLED display panels, display brightness is a key factor affecting its display effect. However, the display brightness adjustment of OLED display panels in related technologies is difficult to adapt to the usage requirements. Summary of the Invention

[0004] Therefore, it is necessary to provide a driving data acquisition method, driving method and driving circuit, and display device to address the problem that the display brightness adjustment of OLED display panels is difficult to adapt to their usage requirements.

[0005] According to one aspect of this application, an embodiment of this application provides a driving data acquisition method for a display panel, the display panel having a display area, comprising: dividing the display area into multiple sub-display areas; adjusting a data voltage to a maximum value to enable the sub-display areas to have a high brightness; adjusting a cathode voltage to enable the sub-display areas to have a first display brightness not lower than the high brightness, and acquiring a first cathode voltage of the sub-display areas corresponding to the first brightness; adjusting a cathode voltage to enable the sub-display areas to have a second display brightness not lower than the high brightness, and acquiring a second cathode voltage of the sub-display areas corresponding to the second brightness; and fitting a driving relationship between the display brightness of the sub-display areas and the cathode voltage.

[0006] The aforementioned driving data acquisition method divides the display area of ​​the display panel into multiple sub-display areas, acquires different cathode voltages of each sub-display area under conditions not lower than high brightness, and then fits the driving relationship between the display brightness of the sub-display area and the cathode voltage. Thus, the cathode voltages of different sub-display areas can be adjusted according to the driving relationship of each sub-display area to ensure that their display brightness meets the display requirements, thereby improving the display effect of the display panel and making it more adaptable.

[0007] In one embodiment, multiple sub-display areas are arranged in an array of m rows and n columns. The multiple sub-display areas include a central display area and peripheral display areas surrounding the central display area. The central display area includes one or more sub-display areas located in row j and column k. Wherein, when m is even, j1 = m / 2, j2 = m / 2 + 1; when m is odd, j = (m + 1) / 2; when n is even, k1 = n / 2, k2 = n / 2 + 1; when n is odd, k = (n + 1) / 2. Optionally, the first display brightness includes high-brightness display brightness, and the second display brightness includes peak brightness. By setting the multiple sub-display areas in a regular arrangement, it is convenient to divide the area of ​​the display screen and also convenient to individually adjust and control the cathode voltage of the multiple sub-display areas. The first display brightness includes high-brightness display brightness, and the second display brightness includes peak brightness. This design allows for the obtaining of the driving relationship of the sub-display areas at higher brightness, satisfying the display requirements of the sub-display areas at higher brightness.

[0008] In one embodiment, fitting the driving relationship between the display brightness of the sub-display area and the cathode voltage includes: assuming the driving relationship of the central display area is: L p =kV p +b, where L p V is the display brightness of the center display area. p Let V be the cathode voltage of the central display area; based on the first cathode voltage V1 corresponding to the first display brightness L1 and the second cathode voltage V2 corresponding to the second display brightness L2, we have k = ((VL)). a -V a L a ) / ((VV) a -V a V a ), b = L a -kV a Among them, (VL) a = (V1L1 + V2L2) / 2, (VV) a = (V1V1 + V2V2) / 2, L a = (L1+L2) / 2, V a = (V1+V2) / 2. The driving relationship of the central display area is fitted based on two sets of data from the central display area. The calculation is simple and highly reliable.

[0009] In one embodiment, the driving data acquisition method further includes: adjusting the central display area to a third display brightness L3, and acquiring a third cathode voltage V3 of the central display area corresponding to the third display brightness L3; substituting the third display brightness L3 and the third cathode voltage V3 into the driving relationship L of the central display area. p =kV p+b is used for verification. After obtaining the driving relationship between the display brightness of the sub-display area and the cathode voltage, the third display brightness L3 and the third cathode voltage V3 of the sub-display area can be substituted to verify the driving relationship to ensure its accuracy.

[0010] In one embodiment, the driving relationship of the peripheral display area is: L q =kV q +b+c; where L q V represents the display brightness of the peripheral display area. q Let c be the cathode voltage of the peripheral display area and c be the compensation voltage value. Optionally, the difference between the cathode voltage of the peripheral display area corresponding to a certain display brightness and the cathode voltage of the central display area corresponding to the same display brightness is the compensation voltage value c. The driving relationship of the peripheral display area is obtained by adding the compensation voltage value c to the driving relationship of the central display area, simplifying the calculation process and making it easier to use.

[0011] According to another aspect of this application, embodiments of this application also provide a driving method for a display panel. The display panel has multiple sub-display areas. The driving method includes: dividing a screen to be displayed into multiple screen regions corresponding to the multiple sub-display areas; determining whether a screen region includes a target region, wherein the target brightness of the target region is not lower than the high-brightness display brightness; when the screen region includes the target region, calculating a target voltage corresponding to the target brightness according to the driving relationship formula of the sub-display areas corresponding to the target region, and adjusting the cathode voltage of the sub-display area to the target voltage so that the sub-display area has the target brightness; when the screen region does not include the target region, adjusting the data voltage of the sub-display area so that the sub-display area has the target brightness.

[0012] The aforementioned display panel driving method divides the screen to be displayed into multiple screen areas corresponding to multiple sub-display areas of the display panel, calculates the target voltage corresponding to the target brightness based on the target brightness of the screen area, and adjusts the cathode voltage or data voltage of the corresponding sub-display area in a targeted manner under different conditions, so that the display brightness of the sub-display area can reach the target brightness, meet the display requirements, and improve the display effect of the display panel.

[0013] According to another aspect of this application, embodiments of this application also provide a driving circuit for a display panel, the display panel having multiple sub-display areas, the driving circuit comprising: a storage module for storing a driving relationship between the display brightness of the sub-display areas and the cathode voltage; a judgment module for dividing the image to be displayed into multiple image regions corresponding to the multiple sub-display areas, and judging whether the multiple image regions include a target area, wherein the target brightness of the target area is not lower than the high-brightness display brightness; and a driving module for, when the multiple image regions include the target area, calculating a target voltage corresponding to the target brightness according to the driving relationship of the sub-display areas corresponding to the target area, adjusting the cathode voltage of the sub-display areas to the target voltage so that the sub-display areas have the target brightness, and further for, when the image regions do not include the target area, adjusting the data voltage of the sub-display areas so that the sub-display areas have the target brightness.

[0014] The aforementioned driving circuit for the display panel uses a storage module to store the driving relationship between the display brightness of the sub-display area and the cathode voltage, a judgment module to divide the image to be displayed into multiple image areas corresponding to multiple sub-display areas of the display panel, and a driving module to adjust the cathode voltage or data voltage of the sub-display area corresponding to the target area according to the target brightness of the image area under different conditions, so that the brightness of the image displayed in the sub-display area can reach the target brightness, meet the display requirements, and improve the display effect of the display panel.

[0015] In one embodiment, the driving circuit further includes a processing module. The processing module is used to obtain a first cathode voltage corresponding to a first display brightness in the sub-display area, obtain a second cathode voltage corresponding to a second display brightness in the sub-display area, and fit a driving relationship formula. By setting the processing module to fit the driving relationship formula between the display brightness and cathode voltage of the sub-display area, the cathode voltage of each sub-display area can be adjusted according to the driving relationship formula of different sub-display areas, so that their display brightness meets the display requirements, improving the display effect of the display panel and making it more adaptable.

[0016] According to another aspect of this application, an embodiment of this application also provides a display device, including: a display panel having a plurality of sub-display areas; and a driving circuit as described above, electrically connected to the display panel; wherein, a sub-display area includes a plurality of light-emitting functional parts.

[0017] The aforementioned display device uses a storage module in the driving circuit to store the driving relationship between the display brightness of the sub-display area and the cathode voltage. It uses a judgment module in the driving circuit to divide the image to be displayed into multiple image areas corresponding to multiple sub-display areas of the display panel. The driving module in the driving circuit adjusts the cathode voltage or data voltage of the sub-display area corresponding to the target area according to the target brightness of the image area under different conditions, so that the brightness of the image displayed in the sub-display area can reach the target brightness, meet the display requirements, and improve the display effect of the display panel.

[0018] In one embodiment, the display panel includes: a substrate; a plurality of light-emitting functional parts disposed on one side of the substrate; and an isolation structure located between at least partially adjacent light-emitting functional parts. This design isolates at least partially adjacent light-emitting functional parts from each other through the isolation structure, facilitating individual adjustment of the cathode voltage of each light-emitting functional part to adjust its display brightness. Attached Figure Description

[0019] Figure 1 This is a flowchart of a driving data acquisition method provided in one embodiment of this application.

[0020] Figure 2 A flowchart of a display panel driving method provided in one embodiment of this application.

[0021] Figure 3 This is a block diagram showing the connection relationship between a driving circuit for a display panel and a display panel, provided in one embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the overall structure of a display device provided in one embodiment of this application.

[0023] Figure 5 This is a structural cross-sectional view of a display panel in a display device provided in one embodiment of this application.

[0024] The reference numerals in the detailed embodiments are as follows:

[0025] 10: Display device;

[0026] 100: Display panel; 110: Substrate; 120: Light-emitting functional part; 121: First electrode; 122: Light-emitting functional layer; 123: Second electrode; 130: Isolation structure; 131: Isolator; 132: Blocking part; 140: Pixel limiting layer; 141: Pixel opening.

[0027] 200: Drive circuit, 210: Storage module, 220: Judgment module, 230: Drive module;

[0028] AA1, AA2, AA3...AAm: Sub-display areas. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] In related technologies, the brightness adjustment of OLED display panels is difficult to adapt to user needs. In some application scenarios, such as when the ambient light is too strong, users often cannot see the content displayed on the screen due to the limited dynamic range of the display panel's brightness. For example, when displaying HDR (High Dynamic Range) images, the display driver module in the display panel determines whether the APL (Average Picture Level) meets preset conditions based on the received image data. When the APL meets the preset conditions, it outputs a display driver signal to the display panel to control the image displayed on the panel to exceed high brightness. However, due to the limited dynamic range of the display device's brightness, the presentation effect of HDR images is affected.

[0036] Figure 1 This is a flowchart of a driving data acquisition method provided in one embodiment of this application.

[0037] To at least partially resolve the above issues, please refer to Figure 1 This application provides a method for acquiring driving data for a display panel, the display panel having a display area, the method comprising the following steps:

[0038] S102, Divide the display area into multiple sub-display areas.

[0039] S104. Adjust the data voltage to the maximum value to make the sub-display area have high brightness.

[0040] S106. Adjust the cathode voltage to make the sub-display area have a first display brightness that is not lower than the high brightness display brightness, and obtain the first cathode voltage of the sub-display area corresponding to the first display brightness.

[0041] S108. Adjust the cathode voltage to make the sub-display area have a second display brightness that is not lower than the high-brightness display brightness, and obtain the second cathode voltage of the sub-display area corresponding to the second display brightness.

[0042] S110. The driving relationship between the display brightness of the sub-display area and the cathode voltage is obtained by fitting.

[0043] In step S102, the multiple sub-display areas are areas divided in the display area of ​​the display panel according to the usage requirements in different scenarios. The specific shape, number, and arrangement of the sub-display areas are not limited.

[0044] In step S104, when the sub-display area of ​​the display panel is in a normal display state, i.e., its display brightness is lower than the high-brightness display brightness, its display brightness can be adjusted by adjusting the data voltage (VDATA) of the sub-display area, while the cathode voltage of the sub-display area remains unchanged. However, when the sub-display area of ​​the display panel has high-brightness display, adjusting the data voltage of the sub-display area is no longer sufficient to change its display brightness. In this case, adjusting the cathode voltage of the sub-display area can further adjust its display brightness.

[0045] In steps S106 and S108, the first display brightness and the second display brightness are any two different display brightnesses of each sub-display area of ​​the display panel within its dynamic display range. The first display brightness and the second display brightness can be preset. When the display brightness of the sub-display areas are different, the cathode voltage (ELVSS or VSS) corresponding to the display brightness of the sub-display area is also different.

[0046] In step S110, based on the relative relationship between the display brightness of the sub-display area and the cathode voltage corresponding to that display brightness, and combining the two sets of data obtained in steps S106 and S108, the driving relationship between the display brightness and cathode voltage of the sub-display area can be fitted. In other embodiments, multiple sets of cathode voltage data corresponding to other display brightness levels of the sub-display area within the dynamic display range can be additionally obtained. Fitting the driving relationship based on multiple sets of data can improve the accuracy and precision of fitting the driving relationship.

[0047] It should be noted that since the display panel has multiple sub-display areas, the driving relationship between the display brightness and cathode voltage of different sub-display areas may be the same or different. The driving relationship between the display brightness and cathode voltage of each sub-display area can be fitted separately, or after fitting the driving relationship between the display brightness and cathode voltage of a certain sub-display area, the driving relationship between the display brightness and cathode voltage of other sub-display areas can be estimated.

[0048] The driving data acquisition method of this application divides the display area of ​​the display panel into multiple sub-display areas, acquires different cathode voltages of the sub-display areas under conditions not lower than high brightness, and fits the driving relationship between the display brightness of the sub-display area and the cathode voltage. Thus, the cathode voltages of the different sub-display areas can be adjusted according to the driving relationship of the different sub-display areas to make their display brightness meet the display requirements, improve the display effect of the display panel, and make it more adaptable.

[0049] As mentioned above, the first display brightness and the second display brightness are any two different display brightnesses of each sub-display area of ​​the display panel within its dynamic display range. In some embodiments, optionally, the first display brightness includes High Brightness Mode (HBM), and the second display brightness includes peak brightness. High Brightness Mode is the initial brightness of the display area of ​​the display panel when entering High Brightness Mode, and peak brightness is the highest brightness that the display area of ​​the display panel can achieve. With this design, the driving relationship between the display brightness of the sub-display area and the cathode voltage is the driving relationship of the sub-display area at higher brightness, satisfying the display requirements of the sub-display area at higher brightness.

[0050] Specifically, the sub-display area includes multiple light-emitting pixels, such as red light-emitting pixels, green light-emitting pixels, and blue light-emitting pixels. Adjusting the cathode voltage of the sub-display area refers to adjusting the cathode voltage of the red light-emitting pixels, green light-emitting pixels, and blue light-emitting pixels located in the sub-display area respectively.

[0051] In the display panel, the number and arrangement of multiple sub-display areas are not limited. For example, multiple sub-display areas can be arranged in a multi-row, multi-column array, which makes the arrangement of sub-display areas more regular. In some embodiments, the multiple sub-display areas can optionally be arranged in an m-row, n-column array. The multiple sub-display areas include a central display area and peripheral display areas surrounding the central display area. The central display area includes one or more sub-display areas located in j-row, k-column. Wherein, when m is even, j1 = m / 2, j2 = m / 2 + 1; when m is odd, j = (m + 1) / 2; when n is even, k1 = n / 2, k2 = n / 2 + 1; when n is odd, k = (n + 1) / 2.

[0052] For example, when multiple sub-display areas are arranged in 4 rows and 4 columns, the sub-display areas located at the positions of 2nd row and 2nd column, 2nd row and 3rd column, 3rd row and 2nd column, and 3rd row and 3rd column are the central display areas, and the sub-display areas located in other rows and columns are the peripheral display areas, all surrounding the central display area. Similarly, when multiple sub-display areas are arranged in 7 rows and 3 columns, the sub-display area located at the position of 4th row and 2nd column is the central display area, and the sub-display areas located in other rows and columns are the peripheral display areas, all surrounding the central display area. By arranging the multiple sub-display areas in a regular pattern, it is easier to divide the area of ​​the display screen, and it is also easier to individually adjust and control the cathode voltage of each sub-display area.

[0053] Since the driving transistors of the display panel are in a saturated state, the display brightness of the sub-display area is linearly related to the cathode voltage corresponding to that display brightness. In some embodiments, optionally, fitting the driving relationship between the display brightness of the sub-display area and the cathode voltage includes: assuming the driving relationship of the central display area is: L p =kV p +b, where L p V is the display brightness of the center display area. p Let V be the cathode voltage of the central display area; based on the first cathode voltage V1 corresponding to the first display brightness L1 and the second cathode voltage V2 corresponding to the second display brightness L2 of the central display area, by binomial fitting, we have k = ((VL)). a -V a L a ) / ((VV) a -V a V a ), b = L a -kV a Among them, (VL) a = (V1L1 + V2L2) / 2, (VV) a = (V1V1 + V2V2) / 2, L a = (L1+L2) / 2, V a = (V1+V2) / 2. The driving relationship of the central display area is fitted based on two sets of data from the central display area. The calculation is simple and highly reliable.

[0054] For example, in one embodiment, V1 = 1, L1 = 1.2, V2 = 2, L2 = 2.5, then (VL) a =(V1L1+V2L2) / 2=3.1, (VV) a =(V1V1+V2V2) / 2=2.5, L a= (L1+L2) / 2 = 1.85, V a =(V1+V2) / 2=1.5, therefore k=((VL) a -V a L a ) / ((VV) a -V a V a ) = 1.3, b = L a -kV a = -0.1, therefore L p =1.3V p -0.1.

[0055] In other embodiments, the fourth cathode voltage V4 corresponding to the fourth display brightness L4 in the center display area, the fifth cathode voltage V5 corresponding to the fifth display brightness L5 in the center display area, etc., can be used to perform binomial fitting using multiple sets of data, and k = ((VL)) / (VL) will still be obtained. a -V a L a ) / ((VV) a -V a V a ), b = L a -kV a The calculation process will not be elaborated here.

[0056] After obtaining the driving relationship between the display brightness of the sub-display area and the cathode voltage in step S108, the driving data acquisition method further includes the following steps:

[0057] S112. Adjust the center display area to the third display brightness L3, and obtain the third cathode voltage V3 of the center display area corresponding to the third display brightness L3.

[0058] S114. Substitute the third display brightness L3 and the third cathode voltage V3 into the driving relationship formula L for the central display area. p =kV p +b is used for verification.

[0059] Substituting the third display brightness L3 and the third cathode voltage V3 of the sub-display area into the driving equation for verification can ensure its accuracy. In addition to the third display brightness L3 and the third cathode voltage V3, multiple sets of data, such as the fourth cathode voltage corresponding to the fourth display brightness and the fifth cathode voltage corresponding to the fifth display brightness of the central display area, can also be obtained to verify the driving equation.

[0060] Furthermore, based on the above embodiments, the driving relationship of the peripheral display area is: L q =kV q +b+c; where L qV represents the display brightness of the peripheral display area. q is the cathode voltage of the peripheral display area, and c is the compensation voltage value.

[0061] As mentioned above, the display brightness of the central display area is linearly related to the cathode voltage corresponding to that brightness. Similarly, the display brightness of the peripheral display areas is also linearly related to the cathode voltage corresponding to that brightness, and both have the same slope. Therefore, by adding a compensation voltage value c to the driving relationship of the central display area, the driving relationship of the peripheral display area can be obtained, simplifying the calculation process and making it easier to use. The value of the compensation voltage value c can be determined based on experience. It should be noted that in the same embodiment, since the resistance values ​​are different at different sub-display area locations, the compensation voltage value c can be equal or unequal for peripheral display areas at different locations, depending on the actual situation.

[0062] For example, the compensation voltage value c can also be determined as follows: Adjust both the peripheral display area and the central display area to any display brightness, obtain the cathode voltage of the peripheral display area corresponding to that display brightness, and the cathode voltage of the central display area corresponding to that display brightness. The difference between the cathode voltage of the peripheral display area and the cathode voltage of the central display area can be used as the compensation voltage value c. In other words, by using the difference in cathode voltage between the peripheral display area and the central display area at the same display brightness as the compensation voltage value c, and combining it with the slope k and constant voltage value b in the driving relationship formula of the central display area, the driving relationship formula for the peripheral display area can be obtained as: L q =kV q +b+c.

[0063] Figure 2 A flowchart of a display panel driving method provided in one embodiment of this application.

[0064] Please see Figure 2 This application also provides a driving method for a display panel, the display panel having multiple sub-display areas, the driving method including the following steps:

[0065] S202. Divide the screen to be displayed into multiple screen areas corresponding to multiple sub-display areas.

[0066] S204. Determine whether the screen area includes the target area, wherein the target brightness of the target area is not lower than the high-brightness display brightness.

[0067] S206. When the screen area includes the target area, calculate the target voltage corresponding to the target brightness according to the driving relationship of the sub-display area corresponding to the target area, and adjust the cathode voltage of the sub-display area to the target voltage so that the sub-display area has the target brightness.

[0068] S208. When the screen area does not include the target area, adjust the data voltage of the sub-display area so that the sub-display area has the target brightness.

[0069] In step S202, the screen to be displayed is divided into multiple screen regions corresponding to multiple sub-display areas, so as to display the screen in partitions. The number of screen regions can be equal to the number of sub-display areas, thus creating a one-to-one correspondence between multiple screen regions and multiple sub-display areas. Alternatively, the number of screen regions can be unequal to the number of sub-display areas, resulting in multiple screen regions corresponding to one sub-display area, or one screen region corresponding to multiple sub-display areas.

[0070] In step S204, it is determined whether the screen area includes the target area, that is, whether there is an area in the screen area that needs to be displayed with a brightness not lower than the high brightness display brightness.

[0071] In step S206, when the screen area includes the target area, the target area corresponds to several sub-display areas. The target voltage corresponding to the target brightness of each sub-display area can be calculated. That is, the target brightness of the sub-display area at this time is substituted into the driving relationship of the sub-display area to calculate the cathode voltage corresponding to the target brightness. By adjusting the cathode voltage of the sub-display area, its display brightness is adjusted in a targeted manner. Even if the cathode voltage of the sub-display area is equal to the target voltage, the display brightness of the sub-display area is at the target brightness, which meets the display requirements of the screen to be displayed.

[0072] In step S208, when the screen area does not include the target area, the data voltage of the sub-display area is adjusted so that the sub-display area has the target brightness.

[0073] The display panel driving method of this application divides the screen to be displayed into multiple screen regions corresponding to multiple sub-display areas of the display panel. It calculates a target voltage corresponding to the target brightness of each screen region and adjusts the cathode voltage or data voltage of the corresponding sub-display area in a targeted manner under different conditions. This ensures that the display brightness of the sub-display area reaches the target brightness, meeting display requirements and improving the display effect of the display panel. Simultaneously, non-target areas within the multiple screen regions are displayed normally, reducing the overall power consumption of the display panel.

[0074] Figure 3 This is a block diagram showing the connection relationship between the driving circuit 200 for the display panel 100 and the display panel 100, provided in one embodiment of this application.

[0075] Please see Figure 3This application embodiment also provides a driving circuit 200 for a display panel 100. The display panel 100 has multiple sub-display areas AA1, AA2, AA3... The driving circuit 200 includes a storage module 210, a judgment module 220, and a driving module 230. The storage module 210 is used to store the driving relationship between the display brightness and cathode voltage of the sub-display areas AA1, AA2, AA3... The judgment module 220 is used to divide the screen to be displayed into multiple screen areas corresponding to the multiple sub-display areas AA1, AA2, AA3... and to determine whether the multiple screen areas include a target area, wherein the target brightness of the target area is not lower than the high brightness display brightness. The driving module 230 is used to calculate the target voltage corresponding to the target brightness according to the driving relationship of the sub-display areas corresponding to the target area when the multiple screen areas include the target area, and adjust the cathode voltage of the sub-display area to the target voltage so that the sub-display area has the target brightness. It is also used to adjust the data voltage of the sub-display area so that the sub-display area has the target brightness when the screen areas do not include the target area.

[0076] In this embodiment, the driving relationship between the display brightness of the sub-display area and the cathode voltage is pre-calculated and directly stored in the storage module 210. Combined with the driving method of the display panel 100 described in any of the above embodiments, and with the help of the storage module 210, the judgment module 220 and the driving module 230 in the driving circuit 200 provided in this embodiment, the above driving method can be implemented so that the brightness of the image displayed in the sub-display area corresponding to the target area can reach the target brightness and meet the display requirements of the display panel 100.

[0077] The driving circuit 200 for the display panel 100 in this embodiment uses a storage module 210 to store the driving relationship between the display brightness and cathode voltage of the sub-display areas AA1, AA2, AA3..., and uses a judgment module 220 to divide the screen to be displayed into multiple screen areas corresponding to the multiple sub-display areas AA1, AA2, AA3... of the display panel 100. The driving module 230 adjusts the cathode voltage or data voltage of the sub-display area corresponding to the target area in different situations according to the target brightness of the screen area, so that the brightness of the screen displayed in the sub-display area can reach the target brightness, meet the display requirements, and improve the display effect of the display panel 100.

[0078] As described in the above embodiments, a target voltage corresponding to the target brightness is calculated for each sub-display area AA1, AA2, AA3... This allows for more precise adjustment of the cathode voltage of each sub-display area AA1, AA2, AA3... based on the target voltage, thereby adjusting its display brightness. Therefore, in some embodiments, the driving circuit 200 optionally includes multiple driving modules 230, each corresponding to one of the multiple sub-display areas AA1, AA2, AA3... The driving modules 230 are used to adjust the cathode voltage of their corresponding sub-display areas. That is, the number of driving modules 230 is equal to the number of sub-display areas AA1, AA2, AA3... , and the multiple driving modules 230 are corresponding to one of the multiple sub-display areas AA1, AA2, AA3... By setting multiple driving modules 230 to precisely adjust the cathode voltage of each sub-display area AA1, AA2, AA3... and thereby adjust its display brightness, the display effect of the display panel 100 is further improved.

[0079] In other embodiments, optionally, the driving relationship between the display brightness of the sub-display area and the cathode voltage may not be pre-fitted. In this case, the driving circuit 200 further includes a processing module, which is used to obtain the first cathode voltage of the sub-display areas AA1, AA2, AA3... corresponding to the first display brightness, obtain the second cathode voltage of the sub-display areas AA1, AA2, AA3... corresponding to the second display brightness, and fit the driving relationship.

[0080] This embodiment uses a processing module to fit and derive the driving relationship between the display brightness of the sub-display area and the cathode voltage, and stores it in the storage module 210. This allows the cathode voltage of different sub-display areas to be adjusted according to their driving relationship, so that their display brightness meets the display requirements, improving the display effect of the display panel and making it more adaptable.

[0081] Figure 4 This is a schematic diagram of the overall structure of a display device 10 provided in one embodiment of this application. Figure 5 This is a structural cross-sectional view of the display panel 100 in a display device 10 provided in one embodiment of this application.

[0082] Please combine Figure 3 And see Figure 4 and Figure 5 This application also provides a display device 10, which includes a display panel 100 and a driving circuit 200 as described in any of the above embodiments. The display panel 100 has a plurality of sub-display areas AA1, AA2, AA3... and the driving circuit 200 is electrically connected to the display panel 100. Each sub-display area AA1, AA2, AA3... includes a plurality of light-emitting functional parts 120.

[0083] The driving circuit 200 of the display panel 100 disclosed in any of the above embodiments of this application is applied in the display device 10 to adjust the display brightness of the display panel 100. The display device 10 can be any product or component with display function, including but not limited to mobile phones, tablet computers, laptops, e-readers, wearable devices, remote controls, televisions, desktop computers, in-vehicle devices, etc. In the embodiments of this application, the display device 10 uses the judgment module 220 in the driving circuit 200 to divide the screen to be displayed into multiple screen areas corresponding to multiple sub-display areas AA1, AA2, AA3... of the display panel 100. The driving module 230 in the driving circuit 200 adjusts the cathode voltage or data voltage of the corresponding sub-display area in a targeted manner according to the display brightness required by the screen area under different conditions, so that the brightness of the screen displayed in the sub-display area can reach the target brightness, meet the display requirements, and improve the display effect of the display panel 100.

[0084] like Figure 5 As shown, in one embodiment, the display panel 100 includes a substrate 110, a plurality of light-emitting functional parts 120 and an isolation structure 130. The plurality of light-emitting functional parts 120 are disposed on one side of the substrate 110, and the isolation structure 130 is located between at least partially adjacent light-emitting functional parts 120.

[0085] In particular, if Figure 5 As shown, when multiple sub-display areas AA1, AA2, AA3... are arranged in 7 rows and 3 columns, the sub-display area located at the 4th row and 2nd column is the central display area, that is, sub-display area AAM is the central display area, and the other sub-display areas besides sub-display area AAM are the surrounding display areas around sub-display area AAM.

[0086] The substrate 110 is used to support and carry other film layers in the display panel 100. Exemplarily, the substrate 110 can be made of materials such as glass or polyimide (PI). A plurality of light-emitting functional parts 120 are provided on one side of the substrate 110. Exemplarily, the light-emitting functional parts 120 can be red light-emitting functional parts, green light-emitting functional parts, blue light-emitting functional parts, or white light-emitting functional parts, etc., without limitation. Specifically, the light-emitting functional parts 120 can include a multilayer structure. Exemplarily, the light-emitting functional parts 120 include a first electrode 121, a light-emitting functional layer 122, and a second electrode 123 stacked together. The light-emitting functional layer 122 can include a hole injection section, a hole transport section, a light-emitting section, an electron transport section, an electron injection section, etc. One of the first electrode 121 and the second electrode 123 is a cathode electrode, and the other is an anode electrode. The light-emitting functional layer 122 emits light under the action of the electric field between the cathode electrode and the anode electrode.

[0087] The display panel 100 also includes an isolation structure 130, which is located between at least some of the adjacent light-emitting functional parts 120. That is, among the plurality of light-emitting functional parts 120, an isolation structure 130 is provided between a portion of two adjacent light-emitting functional parts 120, or an isolation structure 130 is provided between every two adjacent light-emitting functional parts 120. The plurality of light-emitting functional parts 120 remain relatively independent under the isolation effect of the isolation structure 130, so that the plurality of light-emitting functional parts 120 can be individually controlled and adjusted. The specific structural form of the isolation structure 130 is not limited, as long as it can effectively isolate two adjacent light-emitting functional parts 120.

[0088] In some embodiments, the isolation structure 130 is a single, integral structure; please refer to [link / reference]. Figure 5 In some other embodiments, the isolation structure 130 may optionally include an isolation body 131 and a blocking portion 132, the blocking portion 132 being located on the side of the isolation body 131 away from the substrate 110, and the orthographic projection of the isolation body 131 on the substrate 110 being located within the orthographic projection of the blocking portion 132 on the substrate 110.

[0089] In other words, the isolation structure 130 includes a relatively independent isolator 131 and a blocking portion 132. The isolator 131 is located on the substrate 110, and the blocking portion 132 is located on the side of the isolator 131 facing away from the substrate 110. The area covered by the orthographic projection of the blocking portion 132 onto the substrate 110 can be relatively large, while the area covered by the orthographic projection of the isolator 131 onto the substrate 110 can be relatively small, such that the orthographic projection of the blocking portion 132 onto the substrate 110 can cover the orthographic projection of the isolator 131 onto the substrate 110. The cross-sectional shapes of the isolator 131 and the blocking portion 132 can be regular shapes, such as rectangles or triangles, or irregular shapes. Figure 5 In the embodiment shown, both the isolator 131 and the blocking part 132 have trapezoidal cross-sectional shapes.

[0090] This design isolates at least some of the adjacent light-emitting functional parts 120 from each other through the isolation structure 130, making it easier to adjust the cathode voltage of each light-emitting functional part 120 individually and thus adjust its display brightness.

[0091] In some embodiments, the display panel 100 may optionally include a pixel defining layer 140 disposed on the substrate 110, the pixel defining layer 140 defining a plurality of pixel openings 141 spaced apart from each other, the light-emitting functional part 120 being at least partially located within the pixel openings 141, and a partition structure being disposed on the pixel defining layer 140 and located between at least partially adjacent two pixel openings 141.

[0092] Furthermore, the orthographic projection of the pixel opening 141 on the substrate 110 overlaps with the orthographic projection of the first electrode 121 on the substrate 110. Thus, the orthographic projection area of ​​the pixel opening 141 on the substrate 110 is equal to the orthographic projection area of ​​the first electrode 121 on the substrate 110. The first electrode 121 can completely cover the pixel opening 141 to contact the light-emitting functional part 120 located at least partially within the pixel opening 141, so that the light-emitting functional part 120 can emit light under the action of the first electrode 121 and the second electrode 123.

[0093] As described in the above embodiments, the target cathode voltage is obtained for each sub-display area AA1, AA2, AA3... respectively. Based on this target cathode voltage, the cathode voltage of each sub-display area AA1, AA2, AA3... can be adjusted more precisely, thereby regulating its display brightness. Therefore, in one embodiment, the driving circuit 200 includes multiple driving modules 230, which are electrically connected to multiple light-emitting functional units 120. Thus, by setting multiple driving modules 230 to precisely adjust the cathode voltage of each light-emitting functional unit 120 and thereby regulate its display brightness, the display effect of the display panel 100 is further improved.

[0094] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for driving data acquisition, used in a display panel, the display panel having a display area, characterized in that, include: The display area is divided into multiple sub-display areas; Adjust the data voltage to its maximum value to give the sub-display area high brightness. Adjust the cathode voltage to make the sub-display area have a first display brightness that is not lower than the high brightness display brightness, and obtain the first cathode voltage of the sub-display area corresponding to the first display brightness; Adjust the cathode voltage to make the sub-display area have a second display brightness that is not lower than the high-brightness display brightness, and obtain the second cathode voltage of the sub-display area corresponding to the second display brightness; The driving relationship between the display brightness of the sub-display area and the cathode voltage was obtained by fitting.

2. The dynamic data acquisition method according to claim 1, characterized in that, The multiple sub-display areas are arranged in an array of m rows and n columns; The plurality of sub-display areas include a central display area and a peripheral display area surrounding the central display area, wherein the central display area includes one or more sub-display areas located in row j and column k; When m is even, j1 = m / 2, j2 = m / 2 + 1; When m is odd, j = (m+1) / 2; When n is even, k1 = n / 2, k2 = n / 2 + 1; When n is odd, k = (n+1) / 2; Optionally, the first display brightness includes high-brightness display brightness, and the second display brightness includes peak brightness.

3. The dynamic data acquisition method according to claim 2, characterized in that, The fitting yields the following driving relationship between the display brightness of the sub-display area and the cathode voltage: Assume the driving relationship of the central display area is: L p =kV p +b, where L p V represents the display brightness of the central display area. p The cathode voltage of the central display area; Based on the first cathode voltage V1 corresponding to the first display brightness L1 and the second cathode voltage V2 corresponding to the second display brightness L2 of the central display area, we have k = ((VL)). a -V a L a ) / ((VV) a -V a V a ), b = L a -kV a Among them, (VL) a = (V1L1 + V2L2) / 2, (VV) a = (V1V1 + V2V2) / 2, L a = (L1+L2) / 2, V a = (V1+V2) / 2.

4. The dynamic data acquisition method according to claim 3, characterized in that, The driver data acquisition method further includes: Adjust the central display area to the third display brightness L3, and obtain the third cathode voltage V3 of the central display area corresponding to the third display brightness L3; Substituting the third display brightness L3 and the third cathode voltage V3 into the driving relationship L of the central display area p =kV p +b is used for verification.

5. The dynamic data acquisition method according to claim 3, characterized in that, The driving relationship of the peripheral display area is: L q =kV q +b+c; Among them, L q V represents the display brightness of the peripheral display area. q c is the cathode voltage of the peripheral display area, and c is the compensation voltage value; Optionally, the difference between the cathode voltage of the peripheral display area corresponding to a certain display brightness and the cathode voltage of the central display area corresponding to the same display brightness is the compensation voltage value c.

6. A driving method for a display panel, characterized in that, The display panel has multiple sub-display areas, and the driving method includes: The screen to be displayed is divided into multiple screen areas corresponding to the multiple sub-display areas; Determine whether the screen area includes the target area, wherein the target brightness of the target area is not lower than the high-brightness display brightness; When the screen area includes the target area, the target voltage corresponding to the target brightness is calculated according to the driving relationship of the sub-display area corresponding to the target area, and the cathode voltage of the sub-display area is adjusted to the target voltage so that the sub-display area has the target brightness; When the screen area does not include the target area, the data voltage of the sub-display area is adjusted so that the sub-display area has the target brightness.

7. A driving circuit for a display panel, characterized in that, The display panel has multiple sub-display areas, and the driving circuit includes: The storage module is used to store the driving relationship between the display brightness of the sub-display area and the cathode voltage; The judgment module is used to divide the screen to be displayed into multiple screen regions corresponding to the multiple sub-display areas, and to determine whether the multiple screen regions include a target region, wherein the target brightness of the target region is not lower than the high-brightness display brightness; and The driving module is configured to, when the plurality of screen areas include the target area, calculate a target voltage corresponding to the target brightness according to the driving relationship of the sub-display area corresponding to the target area, and adjust the cathode voltage of the sub-display area to the target voltage so that the sub-display area has the target brightness; and is also configured to, when the screen areas do not include the target area, adjust the data voltage of the sub-display area so that the sub-display area has the target brightness.

8. The driving circuit according to claim 7, characterized in that, The driving circuit further includes a processing module, which is used to obtain the first cathode voltage of the sub-display area corresponding to the first display brightness, obtain the second cathode voltage of the sub-display area corresponding to the second display brightness, and fit the driving relationship formula.

9. A display device, characterized in that, include: The display panel has multiple sub-display areas; and The driving circuit as described in claim 7 or 8 is electrically connected to the display panel.

10. The display device according to claim 9, characterized in that, The display panel includes: a substrate; Multiple light-emitting functional parts are disposed on one side of the substrate; and An isolation structure is located between at least partially adjacent light-emitting functional parts; One of the sub-display areas includes a plurality of the light-emitting functional units.

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