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

Abstract

The invention relates to a driving data acquisition method, a driving method, a driving circuit and a display device. The driving data acquisition method comprises the following steps: dividing a display area into a plurality of sub display areas; the data voltage is adjusted to the maximum value so that the sub-display areas can have high display brightness; the cathode voltage is adjusted to enable the sub-display area to have first display brightness not lower than the highlight display brightness, and the first cathode voltage, corresponding to the first display brightness, of the sub-display area is obtained; the cathode voltage is adjusted to enable the sub-display area to have second display brightness not lower than the highlight display brightness, and the second cathode voltage, corresponding to the second display brightness, of the sub-display area is obtained; and fitting to obtain a driving relational expression between the display brightness of the sub-display area and the cathode voltage. According to the driving data acquisition method, the cathode voltages of the sub-display areas can be adjusted according to the driving relational expressions of the different sub-display areas, so that the display brightness of the sub-display areas meets the display requirement, the display effect of the display panel is improved, and the adaptability is higher.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a driving data acquisition method, a driving method and a 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 lighter weight, higher brightness, lower power consumption, faster response and higher definition.

[0003] During the use of the OLED display panel, display brightness is a key factor affecting its display effect. However, the display brightness adjustment of the OLED display panel in the related art is difficult to adapt to its use requirements. Summary of the invention

[0004] Based on this, it is necessary to provide a driving data acquisition method, a driving method and a driving circuit, and a display device to address the problem that the display brightness adjustment of the OLED display panel is difficult to adapt to its usage requirements.

[0005] According to one aspect of the present application, an embodiment of the present application provides a driving data acquisition method for a display panel, the display panel having a display area, including: dividing the display area into multiple sub-display areas; adjusting the data voltage to a maximum value so that the sub-display area has a highlight display brightness; adjusting the cathode voltage so that the sub-display area has a first display brightness that is not lower than the highlight display brightness, and obtaining a first cathode voltage of the sub-display area corresponding to the first display brightness; adjusting the cathode voltage so that the sub-display area has a second display brightness that is not lower than the highlight display brightness, and obtaining a second cathode voltage of the sub-display area corresponding to the second display brightness; fitting to obtain a driving relationship between the display brightness and the cathode voltage of the sub-display area.

[0006] The above-mentioned driving data acquisition method divides the display area of ​​the display panel into multiple sub-display areas, and obtains different cathode voltages of the sub-display areas under the condition of not less than the high-brightness display brightness. Based on this, the driving relationship between the display brightness and the cathode voltage of the sub-display area is fitted. Therefore, the cathode voltages of the sub-display areas can be adjusted according to the driving relationship of different sub-display areas, so 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, a plurality of 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, and the central display area includes one or more sub-display areas located in the j row and k column; wherein, when m is an even number, j1=m / 2, j2=m / 2+1; when m is an odd number, j=(m+1) / 2; when n is an even number, k1=n / 2, k2=n / 2+1; when n is an odd number, k=(n+1) / 2; optionally, the first display brightness includes a highlight display brightness, and the second display brightness includes a peak brightness. By setting the plurality of sub-display areas to have a regular arrangement, it is possible to facilitate the division of the area to be displayed, and it is also possible to facilitate the individual adjustment and control of the cathode voltages of the plurality of sub-display areas. The first display brightness includes a highlight display brightness, and the second display brightness includes a peak brightness. With such a design, a driving relationship of the sub-display area at a higher brightness can be obtained to meet the display requirements of the sub-display area at a higher brightness.

[0008] In one embodiment, the driving relationship between the display brightness of the sub-display area and the cathode voltage obtained by fitting includes: assuming that the driving relationship of the central display area is: L p = kV p +b, where L p is the display brightness of the central display area, V p is the cathode voltage of the central display area; according to the first cathode voltage V1 of the central display area corresponding to the first display brightness L1, and the second cathode voltage V2 of the central display area corresponding to the second display brightness L2, 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 the two sets of data of the central display area, which is simple to calculate and has high reliability.

[0009] In one embodiment, the driving data acquisition method further includes: adjusting the central display area to a third display brightness L3, 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 pAfter the driving relation between the display brightness and the cathode voltage of the sub-display area is obtained, the third display brightness L3 and the third cathode voltage V3 of the sub-display area can be substituted to verify the driving relation to ensure the accuracy of the driving relation.

[0010] In one embodiment, the driving relationship of the peripheral display area is: q = kV q +b+c; where L q is the display brightness of the surrounding display area, V q 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. The compensation voltage value c is added to the driving relationship of the central display area to obtain the driving relationship of the peripheral display area, which simplifies the calculation process and is easy to use.

[0011] According to another aspect of the present application, an embodiment of the present application also provides a driving method for a display panel, wherein the display panel has multiple sub-display areas, and the driving method includes: dividing a picture to be displayed into multiple picture areas corresponding to the multiple sub-display areas; judging whether the picture area includes a target area, wherein a target brightness of the target area is not lower than a highlight display brightness; when the picture area includes the target area, calculating a target voltage corresponding to the target brightness according to a driving relationship for the sub-display area corresponding to the target area, and adjusting a cathode voltage of the sub-display area to the target voltage so that the sub-display area has a target brightness; when the picture area does not include the target area, adjusting a data voltage of the sub-display area so that the sub-display area has a target brightness.

[0012] The above-mentioned driving method of the display panel divides the picture to be displayed into multiple picture areas corresponding to multiple sub-display areas of the display panel, calculates the target voltage corresponding to the target brightness according to the target brightness of the picture area, and specifically adjusts the cathode voltage or data voltage of the corresponding sub-display area in different situations, 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 the present application, an embodiment of the present application also provides 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 and the cathode voltage of the sub-display area; a judgment module, for dividing a picture to be displayed into multiple picture areas corresponding to the multiple sub-display areas, and judging whether the multiple picture areas include a target area, wherein the target brightness of the target area is not lower than the highlight display brightness; and a driving module, for calculating a target voltage corresponding to the target brightness according to a driving relationship of the sub-display area corresponding to the target area when the multiple picture areas include the target area, adjusting the cathode voltage of the sub-display area to the target voltage so that the sub-display area has the target brightness, and also for adjusting the data voltage of the sub-display area when the picture area does not include the target area so that the sub-display area has the target brightness.

[0014] The above-mentioned driving circuit for the display panel adopts a storage module to store the driving relationship between the display brightness and the cathode voltage of the sub-display area, adopts a judgment module to divide the picture to be displayed into multiple picture areas corresponding to the multiple sub-display areas of the display panel, and adopts a driving module to specifically adjust 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 picture area, so that the brightness of the picture 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 of the sub-display area, obtain a second cathode voltage corresponding to a second display brightness of the sub-display area, and obtain a driving relationship by fitting. By setting the processing module to obtain a driving relationship between the display brightness of the sub-display area and the cathode voltage, the cathode voltages of the sub-display areas can be adjusted according to the driving relationship of different sub-display areas, so that their display brightness meets the display requirements, thereby improving the display effect of the display panel and making it more adaptable.

[0016] According to another aspect of the present application, an embodiment of the present application also provides a display device, including: a display panel having multiple 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 above-mentioned display device uses a storage module in a driving circuit to store a driving relationship between the display brightness and the cathode voltage of a sub-display area, uses a judgment module in a driving circuit to divide the picture to be displayed into multiple picture areas corresponding to multiple sub-display areas of the display panel, and uses a driving module in a driving circuit to specifically adjust 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 picture area, so that the brightness of the picture displayed in the sub-display area can reach the target brightness, thereby meeting the display requirements and improving the display effect of the display panel.

[0018] In one embodiment, the display panel includes: a substrate; a plurality of light-emitting functional parts, which are arranged on one side of the substrate; and an isolation structure, which is located between at least some of the adjacent light-emitting functional parts. In this design, at least some of the adjacent light-emitting functional parts are isolated from each other through the isolation structure, so that the cathode voltage of different light-emitting functional parts can be adjusted separately, thereby adjusting the display brightness thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A flowchart of a method for acquiring driving data provided by one embodiment of the present application.

[0020] Figure 2 A flowchart of a method for driving a display panel provided by one embodiment of the present application.

[0021] Figure 3 A block diagram of the connection relationship between a driving circuit for a display panel and a display panel provided in one embodiment of the present application.

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

[0023] Figure 5 A structural cross-sectional view of a display panel in a display device provided in one embodiment of the present application.

[0024] The reference numerals in the specific implementation manner 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: isolation body, 132: blocking part, 140: pixel defining layer, 141: pixel opening;

[0027] 200: driving circuit, 210: storage module, 220: judging module, 230: driving module;

[0028] AA1, AA2, AA3...AAm: sub display area. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0035] In the related art, the display brightness adjustment of the OLED display panel is difficult to adapt to its use requirements. In some application scenarios, for example, when the ambient light is too strong, the user usually cannot see the content displayed on the screen clearly due to the limited dynamic range of the brightness of the display panel. For another example, when it is necessary to display an HDR (High Dynamic Range) picture, the display driver module in the display panel determines whether the APL (Average Picture Level) meets the preset conditions based on the received image data. When the APL meets the preset conditions, the display driver signal is output to the display panel to control the image displayed by the display panel to display at a brightness exceeding the high brightness. However, due to the limited dynamic range of the brightness of the display device, the presentation effect of the HDR picture will be affected.

[0036] Figure 1 A flowchart of a method for acquiring driving data provided by one embodiment of the present application.

[0037] To at least partially address the above issues, see Figure 1 The embodiment of the present application provides a driving data acquisition method for a display panel, wherein the display panel has a display area, and the driving data acquisition method comprises the following steps:

[0038] S102, dividing the display area into a plurality of sub-display areas.

[0039] S104, adjusting the data voltage to a maximum value so that the sub-display area has a high-brightness display brightness.

[0040] S106, adjusting the cathode voltage so that the sub-display area has a first display brightness that is not lower than the highlight display brightness, and obtaining a first cathode voltage of the sub-display area corresponding to the first display brightness.

[0041] S108, adjusting the cathode voltage so that the sub-display area has a second display brightness that is not lower than the highlight display brightness, and obtaining a second cathode voltage of the sub-display area corresponding to the second display brightness.

[0042] S110 , obtaining a driving relationship between the display brightness of the sub-display area and the cathode voltage through fitting.

[0043] In step S102, a plurality of sub-display areas are areas divided in the display area of ​​the display panel according to usage requirements in different scenarios, and the specific shape, number, arrangement, etc. 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, that is, 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, and the cathode voltage of the sub-display area remains unchanged. When the sub-display area of ​​the display panel has a high-brightness display brightness, adjusting the data voltage of the sub-display area is difficult to change its display brightness. At this time, the display brightness can be further adjusted by adjusting the cathode voltage of the sub-display area.

[0045] In step S106 and step 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 the dynamic display range thereof, and the first display brightness and the second display brightness can be preset. When the display brightness of the sub-display area is different, the cathode voltage (ELVSS or VSS) of the sub-display area corresponding to the display brightness is also different.

[0046] In step S110, according to the relative relationship between the display brightness of the sub-display area and the cathode voltage of the sub-display area corresponding to the display brightness, the driving relationship between the display brightness of the sub-display area and the cathode voltage can be fitted in combination with the two sets of data obtained in step S106 and step S108. In other embodiments, multiple sets of cathode voltage data corresponding to other display brightnesses of the sub-display area within the dynamic display range can be additionally obtained, and the fitting is performed comprehensively based on the multiple sets of data, which can improve the precision and accuracy 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 the cathode voltage of different sub-display areas may be the same or different. The driving relationship between the display brightness and the cathode voltage of each sub-display area can be fitted separately, or after fitting the driving relationship between the display brightness and the cathode voltage of a certain sub-display area, the driving relationship between the display brightness and the cathode voltage of other sub-display areas can be estimated.

[0048] The driving data acquisition method of the embodiment of the present application divides the display area of ​​the display panel into multiple sub-display areas, and respectively obtains different cathode voltages of the sub-display areas under the condition of not less than the highlight display brightness. The driving relationship between the display brightness and the cathode voltage of the sub-display area is obtained by fitting. Therefore, the cathode voltages of the sub-display areas can be adjusted according to the driving relationship of the different sub-display areas, so that their display brightness meets the display requirements, thereby improving the display effect of the display panel and being more adaptable.

[0049] As described 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 a highlight display brightness (HBM, High Brightness Mode), and the second display brightness includes a peak brightness. The highlight display brightness is the starting brightness of the display area of ​​the display panel when entering the highlight display mode, and the peak brightness is the highest brightness that the display area of ​​the display panel can reach. With such a 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 a higher brightness, which meets the display requirements of the sub-display area at a higher brightness.

[0050] Specifically, the sub-display area includes multiple light-emitting pixels, for example, red light-emitting pixels, green light-emitting pixels, blue light-emitting pixels, etc. Adjusting the cathode voltage of the sub-display area refers to adjusting the cathode voltages 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 the multiple sub-display areas are not limited. For example, the multiple sub-display areas can be arranged in an array of multiple rows and columns. In this way, the arrangement of the sub-display areas is more regular. In some embodiments, optionally, the 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 a peripheral display area surrounding the central display area, and the central display area includes one or more sub-display areas located in the j row and k column; wherein, when m is an even number, j1=m / 2, j2=m / 2+1; when m is an odd number, j=(m+1) / 2; when n is an even number, k1=n / 2, k2=n / 2+1; when n is an odd number, k=(n+1) / 2.

[0052] Exemplarily, when multiple sub-display areas are arranged in 4 rows and 4 columns, the sub-display areas located at the 2nd row and 2nd column, the 2nd row and 3rd column, the 3rd row and 2nd column, and the 3rd row and 3rd column are all central display areas, and the sub-display areas located in other rows and other columns are peripheral display areas, which are all arranged around the central display area. For another example, when multiple sub-display areas 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, and the sub-display areas located in other rows and other columns are peripheral display areas, which are all arranged around the central display area. By arranging multiple sub-display areas in a regular arrangement, it is possible to facilitate the division of the areas to be displayed, and it is also possible to facilitate the individual adjustment and control of the cathode voltages of multiple sub-display areas.

[0053] Since the driving transistor of the display panel is in a saturated state, the display brightness of the sub-display area is linearly related to the cathode voltage of the sub-display area corresponding to the 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 that the driving relationship of the central display area is: L p = kV p +b, where L p is the display brightness of the central display area, V p is the cathode voltage of the central display area; according to the first cathode voltage V1 of the central display area corresponding to the first display brightness L1, and the second cathode voltage V2 of the central display area corresponding to the second display brightness L2, from the binomial fitting knowledge, 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 the two sets of data of the central display area, which is simple to calculate and has high reliability.

[0054] For example, in one embodiment, V1=1, L1=1.2, V2=2, L2=2.5 are measured, 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, so k=((VL) a -V a L a ) / ((VV) a -V a V a )=1.3,b=L a -kV a =-0.1, from which we can know that L p =1.3V p -0.1.

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

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

[0057] S112, adjusting the central display area to a third display brightness L3, and obtaining a third cathode voltage V3 of the central 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 relation L of the central display area. p = kV p +b for verification.

[0059] Substituting the third display brightness L3 and the third cathode voltage V3 of the sub-display area into the driving relationship equation for verification can ensure the accuracy of the driving relationship equation. 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 of the central display area and the fifth cathode voltage corresponding to the fifth display brightness can also be obtained to verify the driving relationship equation.

[0060] Further, based on the above embodiment, the driving relationship of the peripheral display area is: q = kV q +b+c; where L qis the display brightness of the surrounding display area, V q is the cathode voltage of the peripheral display area, and c is the compensation voltage value.

[0061] As described above, the display brightness of the central display area is linearly related to the cathode voltage of the central display area corresponding to the display brightness. Similarly, the display brightness of the peripheral display area is also linearly related to the cathode voltage of the peripheral display area corresponding to the display brightness, and the slopes of the two are the same. Therefore, the compensation voltage value c is added to the driving relationship of the central display area to obtain the driving relationship of the peripheral display area, which simplifies the calculation process and is easy to use. The value of the compensation voltage value c can be determined based on usage experience. It should be noted that in the same embodiment, since the resistance values ​​at different sub-display area positions are different, the values ​​of the compensation voltage value c for the peripheral display areas at different positions can be equal or different, depending on the actual situation.

[0062] Exemplarily, the compensation voltage value c can also be determined in the following manner: 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 the display brightness, and the cathode voltage of the central display area corresponding to the display brightness, and 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, the difference between the cathode voltages of the peripheral display area and the central display area at the same display brightness is used as the compensation voltage value c, and combined with the slope k and the constant voltage value b in the driving relationship of the central display area, the driving relationship of the peripheral display area can be obtained as follows: q = kV q +b+c.

[0063] Figure 2 A flowchart of a method for driving a display panel provided by one embodiment of the present application.

[0064] See also Figure 2 The embodiment of the present application further provides a method for driving a display panel, wherein the display panel has a plurality of sub-display areas, and the method for driving the display panel comprises the following steps:

[0065] S202: Divide the picture to be displayed into a plurality of picture areas corresponding to a plurality of sub-display areas.

[0066] S204: Determine whether the picture area includes a target area, wherein the target brightness of the target area is not lower than the highlight display brightness.

[0067] S206. When the picture 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 picture 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 picture to be displayed is divided into a plurality of picture areas corresponding to the plurality of sub-display areas, so as to display the picture to be displayed in partitions. The number of picture areas may be equal to the number of sub-display areas, so that the plurality of picture areas correspond to the plurality of sub-display areas one by one. The number of picture areas may also be unequal to the number of sub-display areas, so that a plurality of picture areas correspond to one sub-display area, or a picture area corresponds to a plurality of sub-display areas.

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

[0071] In step S206, when the picture area includes a target area, the target area corresponds to several sub-display areas, and the target voltages of these sub-display areas corresponding to the target brightness can be calculated respectively. That is, the target brightness of the sub-display area at this time is substituted into the driving relationship of the sub-display area, and the cathode voltage corresponding to the target brightness is calculated. By adjusting the cathode voltage of the sub-display area, the 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 picture to be displayed.

[0072] In step S208 , when the picture 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 driving method of the display panel of the embodiment of the present application divides the picture to be displayed into multiple picture areas corresponding to multiple sub-display areas of the display panel, calculates the target voltage corresponding to the target brightness according to the target brightness of the picture area, and adjusts the cathode voltage or data voltage of the corresponding sub-display area in a targeted manner under different circumstances, 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. At the same time, conventional display is performed for non-target areas in the multiple picture areas, which can reduce the overall power consumption of the display panel.

[0074] Figure 3 A block diagram of the connection relationship between a driving circuit 200 for a display panel 100 and the display panel 100 provided in one embodiment of the present application.

[0075] See also Figure 3The embodiment of the present application also provides a driving circuit 200 for a display panel 100, wherein the display panel 100 has a plurality of sub-display areas AA1, AA2, AA3, etc. The driving circuit 200 includes a storage module 210, a judgment module 220 and a driving module 230, wherein the storage module 210 is used to store a driving relationship between the display brightness and the cathode voltage of the sub-display areas AA1, AA2, AA3, etc. The judgment module 220 is used to divide a picture to be displayed into a plurality of picture areas corresponding to the plurality of sub-display areas AA1, AA2, AA3, etc., and to judge whether the plurality of picture areas include a target area, wherein the target brightness of the target area is not lower than the highlight display brightness, and the driving module 230 is used to calculate a target voltage corresponding to the target brightness according to a driving relationship of the sub-display area corresponding to the target area when the plurality of picture areas include the target area, and to 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 used to adjust the data voltage of the sub-display area when the picture area does not include the target area so that the sub-display area has the target brightness.

[0076] In this embodiment, the driving relationship between the display brightness and the cathode voltage of the sub-display area is pre-calculated and directly stored in the storage module 210. In combination with the driving method of the display panel 100 described in any of the above embodiments, 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 picture 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 of the embodiment of the present application adopts a storage module 210 to store the driving relationship between the display brightness and the cathode voltage of the sub-display areas AA1, AA2, AA3..., adopts a judgment module 220 to divide the picture to be displayed into multiple picture areas corresponding to the multiple sub-display areas AA1, AA2, AA3... of the display panel 100, and adopts a driving module 230 to specifically adjust 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 picture area, so that the brightness of the picture 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, the target voltage corresponding to the target brightness is calculated for each sub-display area AA1, AA2, AA3, ..., respectively, and the cathode voltage of each sub-display area AA1, AA2, AA3, ... can be adjusted more accurately according to the target voltage, thereby adjusting the display brightness. Therefore, in some embodiments, optionally, the driving circuit 200 includes a plurality of driving modules 230, and the plurality of driving modules 230 are arranged in a one-to-one correspondence with the plurality of sub-display areas AA1, AA2, AA3, ..., and the driving modules 230 are used to adjust the cathode voltage of the corresponding sub-display area. That is, the number of driving modules 230 is equal to the number of sub-display areas AA1, AA2, AA3, ..., and the plurality of driving modules 230 are arranged in a one-to-one correspondence with the plurality of sub-display areas AA1, AA2, AA3, ..., and the cathode voltage of each sub-display area AA1, AA2, AA3, ... is adjusted in a targeted and accurate manner by setting a plurality of driving modules 230, thereby adjusting the display brightness, thereby further improving the display effect of the display panel 100.

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

[0080] In this embodiment, a processing module is set to fit the driving relationship between the display brightness of the sub-display area and the cathode voltage, and the relationship is stored in the storage module 210. Therefore, the cathode voltages of different sub-display areas can be adjusted according to the driving relationship of different sub-display areas, so that their display brightness meets the display requirements, thereby improving the display effect of the display panel and being more adaptable.

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

[0082] Please combine Figure 3 Also see Figure 4 and Figure 5 The embodiment of the present application also provides a display device 10, which includes a display panel 100 and a driving circuit 200 as in any of the above embodiments, the display panel 100 has a plurality of sub-display areas AA1, AA2, AA3..., the driving circuit 200 is electrically connected to the display panel 100, wherein a 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 the present application is applied to the display device 10 to adjust the display brightness of the display panel 100, and the display device 10 can be any product or component with a display function, including but not limited to a mobile phone, a tablet computer, a laptop computer, an e-reader, a wearable device, a remote control, a television, a desktop computer, a vehicle-mounted device, etc. The display device 10 of the embodiment of the present application uses the judgment module 220 in the driving circuit 200 to divide the image to be displayed into multiple image areas corresponding to the multiple sub-display areas AA1, AA2, AA3, etc. of the display panel 100, and uses the driving module 230 in the driving circuit 200 to specifically adjust the cathode voltage or data voltage of the corresponding sub-display area in different situations according to the display brightness required by the image area, so that the brightness of the image displayed by 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 some adjacent light-emitting functional parts 120.

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

[0086] The substrate 110 is used to support and carry other film layers in the display panel 100. For example, the substrate 110 can be made of materials such as glass and polyimide (PI). A plurality of light-emitting functional parts 120 are provided on one side of the substrate 110. For example, the light-emitting functional part 120 can be a red light-emitting functional part, a green light-emitting functional part, a blue light-emitting functional part or a white light-emitting functional part, etc., which are not limited here. Specifically, the light-emitting functional part 120 can include a multilayer structure. For example, the light-emitting functional part 120 includes a first electrode 121, a light-emitting functional layer 122 and a second electrode 123 which are stacked, wherein the light-emitting functional layer 122 can include a hole injection part, a hole transport part, a light-emitting part, an electron transport part, an electron injection part, 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 further 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 some of the adjacent two light-emitting functional parts 120, or an isolation structure 130 is provided between every two adjacent light-emitting functional parts 120, and 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 play the role of isolating two adjacent light-emitting functional parts 120.

[0088] In some embodiments, the isolation structure 130 is an integrated structure. Figure 5 In some other embodiments, optionally, the isolation structure 130 includes an isolation body 131 and a blocking portion 132, the blocking portion 132 is located on the side of the isolation body 131 facing away from the substrate 110, and the orthographic projection of the isolation body 131 on the substrate 110 is located within the orthographic projection of the blocking portion 132 on the substrate 110.

[0089] That is to say, the isolation structure 130 includes a relatively independent isolation body 131 and a blocking portion 132, wherein the isolation body 131 is located on the substrate 110, and the blocking portion 132 is located on the side of the isolation body 131 away from the substrate 110. The area covered by the orthographic projection of the blocking portion 132 on the substrate 110 can be relatively large, while the area covered by the orthographic projection of the isolation body 131 on the substrate 110 is relatively small, so that the orthographic projection of the blocking portion 132 on the substrate 110 can cover the orthographic projection of the isolation body 131 on the substrate 110. The cross-sectional shapes of the isolation body 131 and the blocking portion 132 can be regular shapes, such as rectangles, triangles, etc., or irregular shapes. Figure 5 In the illustrated embodiment, the cross-sectional shapes of the isolating body 131 and the blocking portion 132 are both trapezoidal.

[0090] With such a design, at least some of the adjacent light-emitting functional parts 120 are isolated from each other through the isolation structure 130 , so that the cathode voltages of different light-emitting functional parts 120 can be adjusted individually to adjust the display brightness thereof.

[0091] In some embodiments, optionally, the display panel 100 also includes a pixel defining layer 140, which is disposed on the substrate 110, and the pixel defining layer 140 defines a plurality of pixel openings 141 that are spaced apart from each other, the light-emitting functional portion 120 is at least partially located within the pixel opening 141, and the partition structure is disposed on the pixel defining layer 140 and is located between at least partially two adjacent 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, so that 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, and the first electrode 121 can just completely cover the pixel opening 141 to contact the light-emitting functional portion 120 at least partially located in the pixel opening 141, so that the light-emitting functional portion 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, ..., and the cathode voltage of each sub-display area AA1, AA2, AA3, ... can be adjusted more accurately according to the target cathode voltage, thereby adjusting the display brightness. Therefore, in one embodiment, the driving circuit 200 includes a plurality of driving modules 230, and the plurality of driving modules 230 are electrically connected to the plurality of light-emitting functional parts 120. In this way, by providing a plurality of driving modules 230, the cathode voltage of each light-emitting functional part 120 is adjusted accurately and specifically, thereby adjusting the display brightness, thereby further improving the display effect of the display panel 100.

[0094] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A driving data acquisition method for a display panel, wherein the display panel has a display area, characterized in that: include: Dividing the display area into a plurality of sub-display areas; adjusting the data voltage to a maximum value so that the sub-display area has a high-brightness display brightness; adjusting the cathode voltage so that the sub-display area has a first display brightness that is not lower than the highlight display brightness, and obtaining a first cathode voltage of the sub-display area corresponding to the first display brightness; adjusting the cathode voltage so that the sub-display area has a second display brightness that is not lower than the highlight display brightness, and obtaining a 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 is obtained by fitting.

2. The method for acquiring dynamic data according to claim 1, characterized in that: The plurality of 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 an even number, j1=m / 2, j2=m / 2+1; When m is an odd number, j = (m + 1) / 2; When n is an even number, k1=n / 2, k2=n / 2+1; When n is an odd number, k = (n + 1) / 2; Optionally, the first display brightness includes highlight display brightness, and the second display brightness includes peak brightness.

3. The method for acquiring dynamic data according to claim 2, characterized in that: The driving relationship between the display brightness of the sub-display area and the cathode voltage obtained by fitting includes: Assume that the driving relationship of the central display area is: L p = kV p +b, where L p is the display brightness of the central display area, V p is the cathode voltage of the central display area; According to the first cathode voltage V1 of the central display area corresponding to the first display brightness L1, and the second cathode voltage V2 of the central display area corresponding to the second display brightness L2, 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 method for acquiring dynamic data according to claim 3, characterized in that: The driving data acquisition method further includes: Adjusting the central display area to a third display brightness L3, and obtaining a third cathode voltage V3 of the central display area corresponding to the third display brightness L3; Substitute 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 for verification.

5. The method for acquiring dynamic data according to claim 3, characterized in that: The driving relationship of the peripheral display area is: q = kV q +b+c; Among them, L q is the display brightness of the peripheral display area, V q 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 method for driving a display panel, characterized in that: The display panel has a plurality of sub-display areas, and the driving method includes: Dividing the picture to be displayed into a plurality of picture areas corresponding to the plurality of sub-display areas; Determining whether the picture area includes a target area, wherein the target brightness of the target area is not lower than the highlight display brightness; When the picture area includes the target area, a target voltage corresponding to the target brightness is calculated according to a driving relationship of the sub-display area corresponding to the target area, and a 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 picture 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 a plurality of sub-display areas, and the driving circuit includes: A storage module, used for storing a driving relationship between the display brightness of the sub-display area and the cathode voltage; a judgment module, used for dividing the to-be-displayed picture into a plurality of picture areas corresponding to the plurality of sub-display areas, and judging whether the plurality of picture areas include a target area, wherein a target brightness of the target area is not lower than a highlight display brightness; and A driving module is used to calculate a target voltage corresponding to the target brightness according to a driving relationship of the sub-display area corresponding to the target area when the multiple picture 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; and 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 picture area does not include the target area.

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

9. A display device, characterized in that: include: A display panel having a plurality of 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 comprises: a substrate; A plurality of light-emitting functional parts are disposed on one side of the substrate; and An isolation structure, located between at least some of the adjacent light-emitting functional parts; Wherein, one of the sub-display areas includes a plurality of the light-emitting functional parts.

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