Driving method and driving device of display panel and display device

Abstract

The invention discloses a driving method and driving device of a display panel and a display device.The display panel comprises a plurality of sub-pixels, each sub-pixel comprises a pixel circuit and a light-emitting device, the first end of each light-emitting device is connected with the corresponding pixel circuit, and the second end of each light-emitting device is used for receiving first power supply voltage; the driving method of the display panel comprises the following steps: determining the current working state of the display panel; determining a first power supply voltage adopted by the display panel according to the current working state; wherein the absolute value of the first power supply voltage adopted by the display panel when the current working state is the gamma debugging state is greater than the absolute value of the first power supply voltage adopted by the display panel when the current working state is the non-gamma debugging state. The power consumption of the display panel is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a driving method, driving device, and display device for a display panel. Background Technology

[0002] Organic light-emitting diode (OLED) display technology is considered one of the most promising next-generation display technologies. Compared to liquid crystal displays, OLED technology offers advantages such as lower energy consumption, lower cost, self-emissive properties, wide viewing angles, and faster response times.

[0003] In the traditional OLED display panel manufacturing process, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also suffers from limitations in precision and high cost. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance characteristics, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding fine metal mask-less technology and are provided for reference.

[0004] However, existing display panels consume a lot of power, which affects their battery life. Summary of the Invention

[0005] In order to overcome the technical problems mentioned in the above technical background, this application provides a driving method, driving device and display device for a display panel to reduce the power consumption of the display panel.

[0006] According to one aspect of the present invention, a driving method for a display panel is provided. The display panel includes a plurality of sub-pixels, each sub-pixel including a pixel circuit and a light-emitting device, a first end of the light-emitting device being connected to the pixel circuit, and a second end of the light-emitting device being used to receive a first power supply voltage.

[0007] The driving methods for the display panel include:

[0008] Determine the current working status of the display panel;

[0009] The first power supply voltage used by the display panel is determined based on the current operating state; wherein, the absolute value of the first power supply voltage used by the display panel when the current operating state is gamma adjustment state is greater than the absolute value of the first power supply voltage used by the display panel when the current operating state is not gamma adjustment state.

[0010] Furthermore, the first power supply voltage used by the display panel is determined based on the current operating status, which previously included:

[0011] Determine the current display brightness level used by the display panel;

[0012] The first power supply voltage used by the display panel is determined based on the current operating status, including:

[0013] The first power supply voltage used by the display panel is determined based on the current operating status and the current display brightness level.

[0014] Furthermore, under the same operating conditions, the first power supply voltage used by the display panel is different at at least some different display brightness levels; wherein, the smaller the display brightness level, the smaller the absolute value of the first power supply voltage used by the display panel.

[0015] Furthermore, under the same operating conditions, the first power supply voltage used by the display panel is different for different display brightness levels; or, under the same operating conditions, the first power supply voltage used by the display panel is different for different display brightness level ranges, and the first power supply voltage used by the display panel is the same for the same display brightness level range; wherein, the smaller the display brightness level within the display brightness level range, the smaller the absolute value of the first power supply voltage used by the display panel corresponding to the display brightness level range.

[0016] Furthermore, the first power supply voltage used by the display panel is determined based on the current operating status and the currently used display brightness level, including:

[0017] The first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each working state.

[0018] Optionally, the first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each operating state, including:

[0019] Based on the current operating state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each operating state, the first power supply voltage used by the display panel is determined by interpolation.

[0020] Furthermore, the first power supply voltage used by the display panel is determined based on the current operating status, which previously included:

[0021] Determine the current display brightness level of the display panel and the grayscale to be displayed for each sub-pixel in the display panel;

[0022] The first power supply voltage used by the display panel is determined based on the current operating status, including:

[0023] The first power supply voltage used by the display panel is determined based on the current operating status, the current display brightness level, and the grayscale to be displayed.

[0024] Furthermore, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel is different for at least some different grayscale levels to be displayed; wherein, under the same operating conditions and at the same display brightness level, the smaller the grayscale level to be displayed, the smaller the absolute value of the first power supply voltage used by the display panel.

[0025] Optionally, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel may be different for different grayscale levels to be displayed; or, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel may be different for different grayscale ranges to be displayed, while the first power supply voltage used by the display panel may be the same for the same grayscale range to be displayed; wherein, under the same operating conditions and at the same display brightness level, the smaller the grayscale level to be displayed within the grayscale range, the smaller the absolute value of the first power supply voltage used by the display panel corresponding to the grayscale range to be displayed.

[0026] Furthermore, based on the current operating status, the currently used display brightness level, and the grayscale to be displayed, the first power supply voltage used by the display panel is determined, including:

[0027] The equivalent display grayscale of the display panel is determined based on the grayscale to be displayed for each sub-pixel, and the first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, and the equivalent display grayscale; or, the first power supply voltage used by each sub-pixel is determined based on the current working state, the currently used display brightness level, and the grayscale to be displayed for each sub-pixel.

[0028] Furthermore, based on the current operating status, the currently used display brightness level, and the grayscale to be displayed, the first power supply voltage used by the display panel is determined, including:

[0029] The first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined working state.

[0030] Optionally, the first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined operating state, including:

[0031] Based on the current operating state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined operating state, the first power supply voltage used by the display panel is determined by interpolation.

[0032] Furthermore, the display panel includes at least two different light-emitting color sub-pixels;

[0033] At least some of the different light-emitting color sub-pixels correspond to different first power supply voltages;

[0034] Optionally, different light-emitting color sub-pixels correspond to different first power supply voltages.

[0035] Furthermore, in the gamma adjustment state, the first power supply voltage used by the display panel is determined based on the first brightness data; in the non-gamma adjustment state, the first power supply voltage used by the display panel is determined based on the second brightness data; wherein, the first brightness data is the maximum brightness data of the display panel in the gamma adjustment state, and the second brightness data is the maximum brightness data of the display panel in the non-gamma adjustment state.

[0036] Furthermore, determine the current operating status of the display panel, including:

[0037] The current working status is determined based on the received trigger signal.

[0038] Furthermore, the light-emitting device includes a first electrode, a light-emitting structure, and a second electrode stacked sequentially. The first electrode is electrically connected to the pixel circuit, and the second electrode is used to receive the first power supply voltage.

[0039] The second electrodes of different light-emitting devices are electrically connected to each other.

[0040] Furthermore, the light-emitting device includes a first electrode, a light-emitting structure, and a second electrode stacked sequentially. The first electrode is electrically connected to the pixel circuit, and the second electrode is used to receive the first power supply voltage.

[0041] At least some of the second electrodes of the light-emitting devices are mutually insulated;

[0042] Optionally, the display panel includes an array substrate stacked in sequence and an isolation structure disposed on one side of the array substrate;

[0043] The pixel circuit is disposed within the array substrate, and the isolation structure encloses and forms multiple isolation openings, in which the light-emitting device is disposed. The isolation structure is used to disconnect the second electrodes of the light-emitting devices in different isolation openings, so that the second electrodes of the light-emitting devices in at least some of the different isolation openings are mutually insulated.

[0044] According to another aspect of the present invention, a driving method for a display panel is provided. The display panel includes a plurality of sub-pixels, each sub-pixel including a pixel circuit and a light-emitting device, a first end of the light-emitting device being connected to the pixel circuit, and a second end of the light-emitting device being used to receive a power supply voltage.

[0045] The driving methods for the display panel include:

[0046] Determine the maximum grayscale to be displayed on the display panel at the current display brightness level;

[0047] If the maximum grayscale to be displayed is greater than the preset grayscale and less than or equal to the maximum grayscale, then the power supply voltage used by the display panel is determined to be the second power supply voltage.

[0048] If the maximum grayscale to be displayed is less than or equal to the preset grayscale, then the power supply voltage used by the display panel is determined to be the third power supply voltage; wherein, the absolute value of the second power supply voltage is greater than the absolute value of the third power supply voltage.

[0049] According to another aspect of the present invention, a driving device for a display panel is provided. The display panel includes a plurality of sub-pixels, each sub-pixel including a pixel circuit and a light-emitting device, a first end of the light-emitting device being connected to the pixel circuit, and a second end of the light-emitting device being used to receive a first power supply voltage.

[0050] The driving methods for the display panel include:

[0051] The working status determination module is used to determine the current working status of the display panel;

[0052] The first power supply voltage determination module is used to determine the first power supply voltage used by the display panel based on the current working state; wherein, the absolute value of the first power supply voltage used by the display panel when the current working state is gamma debugging state is greater than the absolute value of the first power supply voltage used by the display panel when the current working state is not gamma debugging state.

[0053] According to another aspect of the present invention, a display device is provided, the display device including a display panel and a driving device for the display panel as described in any of the above embodiments.

[0054] The display panel driving method provided in this embodiment of the invention increases the first power supply voltage applied to the first power supply terminal in the non-gamma debugging state by setting the absolute value of the first power supply voltage used by the display panel when the current working state is gamma debugging state to be greater than the absolute value of the first power supply voltage used by the display panel when the current working state is non-gamma debugging state. This can reduce the power consumption of the display panel while ensuring that the driving module works in the saturation region, that is, while ensuring that the display panel displays the preset display brightness.

[0055] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of a display panel according to one embodiment of this application;

[0058] Figure 2 It shows Figure 1 A schematic diagram of the partial film layer cross-section structure in the BB direction of a local area of ​​the display panel;

[0059] Figure 3 A schematic diagram of the internal structure of the array substrate in the display panel is shown;

[0060] Figure 4 A schematic diagram of a pixel circuit is shown.

[0061] Figure 5 A schematic diagram of an isolation structure in a display panel is shown;

[0062] Figure 6 A schematic diagram of another portion of the film layer cross-section structure of the display panel is shown;

[0063] Figure 7 This is a schematic diagram of the light-emitting structure according to one embodiment of this application;

[0064] Figure 8 A schematic diagram of the encapsulation section in a display panel is shown;

[0065] Figure 9 It shows Figure 1A schematic diagram of another part of the film layer cross-section structure in the BB direction of a local area of ​​the display panel;

[0066] Figure 10 A flowchart illustrating a method for manufacturing a display panel is shown;

[0067] Figure 11 This is a flowchart of a driving method for a display panel according to an embodiment of the present invention;

[0068] Figure 12 This is a schematic diagram of a sub-pixel provided according to an embodiment of the present invention;

[0069] Figure 13 This is a flowchart of another driving method for a display panel provided according to an embodiment of the present invention;

[0070] Figure 14 This is a flowchart of another display panel driving method provided according to an embodiment of the present invention;

[0071] Figure 15 This is a flowchart of another display panel driving method provided according to an embodiment of the present invention;

[0072] Figure 16 This is a schematic diagram of the structure of a driving device for a display panel according to an embodiment of the present invention;

[0073] Figure 17 This is a schematic diagram of a display device provided in an embodiment of the present invention. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0075] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0076] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. It should be noted that, unless otherwise specified, different features in the embodiments of this application can be combined with each other.

[0077] For ease of understanding, the accompanying diagram shows the mutually orthogonal X-axis, Y-axis, and Z-axis. The direction along the X-axis is called the X-direction, the direction along the Y-axis is called the Y-direction, and the direction along the Z-axis is called the Z-direction. The Z-direction is the normal direction relative to the plane containing the X and Y directions. Furthermore, a view where various elements are observed parallel to the plane containing the X and Y directions is called a top view. Alternatively, the planes in the X and Y directions can be planes parallel to the display surface of the display panel, and the Z-direction can be a direction parallel to the thickness direction of the display panel.

[0078] For certain elements, terms like "above" or "overhead" are sometimes used when describing the position of an element in the Z direction, and "below" or "under" are used when describing the position of an element in the opposite direction. Furthermore, when using terms like "above," "overhead," "below," "under," or "relative" to define the positional relationship between two elements, this includes not only the state where the two elements are directly adjacent, but also the state where the two elements are separated by gaps or other elements. Additionally, terms like "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0079] Figure 1 This is a schematic diagram of the structure of a display panel according to one embodiment of this application. The display panel 100 can be an organic light-emitting diode (OLED) display panel or a quantum dot light-emitting diode (QLED) display panel. The display panel 100 includes a display area AA with display function and a non-display area NA.

[0080] The display area AA of the display panel 100 can be rectangular, square, circular, oval, or other shapes.

[0081] The display area AA includes a plurality of pixels PX arranged in the X and Y directions. Each pixel PX includes a plurality of sub-pixels SPX displaying different colors. In some embodiments, a pixel PX includes a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. For example, the first sub-pixel SPX1 is a blue sub-pixel, the second sub-pixel SPX2 is a green sub-pixel SPX2, and the third sub-pixel SPX3 is a red sub-pixel SPX3. In some embodiments, in addition to sub-pixels SPX1, SPX2, and SPX3, a pixel PX also includes sub-pixels SPX that emit white or other colors of light.

[0082] A sub-pixel (SPX) includes a pixel circuit and a light-emitting device driven by the pixel circuit to emit light of the corresponding color. The first sub-pixel (SPX1) includes a first light-emitting device, the second sub-pixel (SPX2) includes a second light-emitting device, and the third sub-pixel (SPX3) includes a third light-emitting device. One pixel circuit drives at least one light-emitting device to emit light. For example, the display area AA includes a normal display area and a light-transmitting display area. The light-transmitting display area is a display area set according to a corresponding sensor and has light-transmitting properties, while the normal display area is a display area not set according to a corresponding sensor. In the normal display area, one pixel circuit drives one light-emitting device to emit light, and in the light-transmitting display area, one pixel circuit drives one or more light-emitting devices to emit light.

[0083] In one implementation, Figure 2 It shows Figure 1 A schematic diagram of a partial cross-sectional structure of the film layer in the BB direction of a local area of ​​the display panel. (Reference) Figure 2 The display panel 100 includes an array substrate 11, an isolation structure 12, and multiple light-emitting devices 13.

[0084] Figure 3 A schematic diagram of the internal structure of the array substrate in the display panel is shown. (Refer to...) Figure 3 The array substrate 11 includes a pixel circuit layer and a planarization layer 19. The pixel circuit layer includes pixel circuits for driving the light-emitting device 13 to emit light. Figure 3 A transistor 18 in a pixel circuit is shown. A via is provided in the planarization layer 19, and a first electrode 131 is electrically connected to the transistor 18 in the pixel circuit layer through the via. Furthermore, the pixel circuit layer includes at least one insulating layer, which may include at least one of an inorganic layer and an organic layer. Additionally, the array substrate 11 includes scan lines providing the scan signal Scan and data lines providing the data signal Data to the pixel circuit.

[0085] Figure 4 A schematic diagram of a pixel circuit is shown, for reference. Figure 4The pixel circuit includes a driving transistor T1 and a data transistor T2. The source of the data transistor T2 is connected to the data line that provides the data signal Data, the gate of the data transistor T2 is connected to the scan line that provides the scan signal Scan, and the drain of the data transistor T2 is connected to the gate of the driving transistor T1. The two ends of the storage capacitor C1 are respectively connected to the gate and the source of the driving transistor T1, and the drain of the driving transistor T1 is connected to the light-emitting device 13. Figure 4 This is one implementation of a pixel circuit; the pixel circuit described in this application is not limited to... Figure 4 The 2T1C pixel circuit shown can also be other pixel circuits, such as 7T1C, 8T1C pixel circuits, etc.

[0086] Figure 5 A schematic diagram of an isolation structure in a display panel is shown, with reference to... Figure 2 and Figure 5 An isolation structure 12 is located on one side of the array substrate 11 and encloses multiple isolation openings 12a, including multiple first isolation openings 12a1, multiple second isolation openings 12a2, and multiple third isolation openings 12a3. Multiple light-emitting devices 13 are located on one side of the array substrate 11 and include multiple first light-emitting devices 13a, multiple second light-emitting devices 13b, and multiple third light-emitting devices 13c. First light-emitting devices 13a are disposed corresponding to first isolation openings 12a1, second light-emitting devices 13b are disposed corresponding to second isolation openings 12a2, and third light-emitting devices 13c are disposed corresponding to third isolation openings 12a3. In one embodiment, one light-emitting device 13 is disposed corresponding to one isolation opening 12a. For example, one first light-emitting device 13a is disposed one-to-one with one first isolation opening 12a1, one second light-emitting device 13b is disposed one-to-one with one second isolation opening 12a2, and one third light-emitting device 13c is disposed one-to-one with one third isolation opening 12a3. At least a portion of the first light-emitting device 13a is disposed within a corresponding first isolation opening 12a1, at least a portion of the second light-emitting device 13b is disposed within a corresponding second isolation opening 12a2, and at least a portion of the third light-emitting device 13c is disposed within a corresponding third isolation opening 12a3. In another embodiment, multiple light-emitting devices 13 are correspondingly disposed with one isolation opening 12a; for example, multiple light-emitting devices with the same emission color are corresponding to one isolation opening 12a.

[0087] In one example, the isolation structure 12 includes an isolation portion 122 and a blocking portion 121 stacked along a direction away from the array substrate 11 (i.e., the Z direction), with the width of the blocking portion 121 being greater than the width of the isolation portion 122. Thus, the two ends of the blocking portion 121 protrude compared to the sides of the isolation portion 122, and this shape of the isolation structure 12 is also referred to as a cantilever shape. The isolation portion 122 and the blocking portion 121 are made of different materials, and the etching rate of the blocking portion 121 is lower than that of the isolation portion 122. The material of the isolation portion 122 includes a conductive material, specifically including at least one of aluminum (Al), aluminum alloys, and aluminum alloys including at least one of aluminum-neodymium alloy (AlNd), aluminum-yttrium alloy (AlY), or aluminum-silicon alloy (AlSi). The blocking portion 121 can be a single-layer structure or a multi-layer structure. If the blocking portion 121 is a single-layer structure, the material of the blocking portion 121 can include at least one of titanium, titanium nitride, molybdenum, tungsten, molybdenum-tungsten alloy, or molybdenum-niobium alloy. When the blocking part 121 has a multi-layer structure, one layer of the blocking part 121 is made of at least one of titanium, titanium nitride, molybdenum, tungsten, molybdenum-tungsten alloy or molybdenum-niobium alloy, and the other layer of the blocking part 121 may be made of conductive oxide or inorganic insulating material, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0088] In some embodiments, Figure 6 A schematic diagram of another partial film layer cross-sectional structure of the display panel is shown, for reference. Figure 6 The isolation structure 12 may further include a base 123 located on the side of the isolation portion 122 near the array substrate 11. The base 123 protrudes relative to the isolation portion 122 in the direction toward the isolation opening 12a, and the orthographic projection of the isolation portion 122 on the array substrate 11 lies within the orthographic projection of the base 123 on the array substrate 11. The material of the base 123 may include at least one of molybdenum (Mo), titanium (Ti), titanium nitride (TiN), molybdenum-tungsten alloy (MoW), or molybdenum-niobium alloy (MoNb).

[0089] In one embodiment, the display panel 100 may further include a pixel defining layer 17, on which an isolation structure 12 is disposed. The pixel defining layer 17 has pixel openings communicating with isolation openings 12a. Specifically, the pixel defining layer 17 has a first pixel opening communicating with a first isolation opening 12a1, a second pixel opening communicating with a second isolation opening 12a2, and a third pixel opening communicating with a third isolation opening 12a3. The areas of the orthographic projections of the first, second, and third pixel openings onto the array substrate 11 may be the same or different. The shapes of the orthographic projections of the pixel openings and the corresponding isolation openings 12a onto the array substrate 11 may be the same or different. Generally, the area of ​​the orthographic projection of the isolation opening 12a onto the array substrate 11 is larger than the area of ​​the orthographic projection of the pixel opening communicating with the isolation opening 12a onto the array substrate 11. The orthographic projections of the pixel openings of the light-emitting device 13 onto the array substrate 11 overlap with the orthographic projections of the isolation openings 12a onto the array substrate 11. The pixel defining layer 17 is made of an inorganic material, such as an inorganic insulating material formed by using at least one of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON).

[0090] In another embodiment, the isolation structure 12 is disposed within the recess of the pixel limiting layer 17. Alternatively, the pixel limiting layer 17 may not be provided in the display panel 100, and the isolation structure 12 may be disposed on one side of the array substrate 11, with the isolation structure 12 in contact with one side of the array substrate 11.

[0091] The first light-emitting device 13a, the second light-emitting device 13b, and the third light-emitting device 13c emit light of different colors. Each of the three devices includes a first electrode 131, a light-emitting structure 132, and a second electrode 133 stacked together. The first electrode 131 is disposed on the array substrate 11, and a pixel defining layer 17 covers the end of the first electrode 131. A pixel opening is provided on the pixel defining layer 17, through which the first electrode 131 is exposed. The light-emitting structure 132 of the first light-emitting device 13a, the second light-emitting device 13b, and the third light-emitting device 13c covers the sidewall of the pixel opening of the pixel defining layer 17 and the side of the pixel defining layer 17 facing away from the array substrate 11. Each light-emitting structure 132 is located within the pixel opening and is in contact with the first electrode 131.

[0092] The second electrodes 133 of the first light-emitting device 13a, the second light-emitting device 13b, and the third light-emitting device 13c respectively cover the corresponding light-emitting structure 132. The second electrodes 133 are electrically connected to the isolation structure 12. For example, the second electrodes 133 are connected to the isolation portion 122 of the isolation structure 12, and / or the second electrodes 133 are connected to the base portion 123 of the isolation structure 12. Specifically, when the isolation structure 12 includes a three-layer structure of a blocking portion 121, an isolation portion 122, and a base portion 123, the second electrodes 133 can extend to the side surface of the base portion 123 facing away from the array substrate 11 to connect with the base portion 123. In this case, the second electrodes 133 may or may not be connected to the isolation portion 122.

[0093] The first electrode 131 can be an anode, and the second electrode 133 can be a cathode. The first electrode 131 of each light-emitting device 13 can be connected to the pixel circuit through a via, so that the pixel circuit drives the light-emitting device 13 to emit light.

[0094] The first electrode 131 may include a multilayer structure, such as a reflective layer and a pair of conductive oxide layers covering the upper and lower surfaces of the reflective layer, respectively. The reflective layer can be formed, for example, using silver, a metallic material with excellent light reflectivity. Each conductive oxide layer can be formed, for example, from a transparent conductive oxide such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or IGZO (Indium Gallium Zinc Oxide). The second electrode 133 is formed, for example, from a metallic material such as an alloy of magnesium and silver (MgAg).

[0095] Figure 7 This is a schematic diagram of a light-emitting structure according to one embodiment of this application. The light-emitting structure 132 of at least one of the first light-emitting device 13a, the second light-emitting device 13b, and the third light-emitting device 13c includes a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, a light-emitting material layer EML, a hole blocking layer HBL, an electron transport layer ETL, and an electron injection layer EIL stacked along a direction away from the array substrate 11 (i.e., the Z direction). The light-emitting structure 132 may include one light-emitting material layer EML, or a stacked light-emitting structure including multiple light-emitting material layers EML.

[0096] In order for the light-emitting structure 132 to emit light, a pixel voltage is provided to the first electrode 131 and a common voltage is provided to the second electrode 133, forming a potential difference between the first electrode 131 and the second electrode 133, so that the light-emitting structure 132 disposed between the first electrode 131 and the second electrode 133 emits light. In one embodiment, if a potential difference is formed between the first electrode 131 and the second electrode 133 of the first light-emitting device 13a, the light-emitting material layer EML of the light-emitting structure 132 emits blue light; if a potential difference is formed between the first electrode 131 and the second electrode 133 of the second light-emitting device 13b, the light-emitting material layer EML of the light-emitting structure 132 emits green light; and if a potential difference is formed between the first electrode 131 and the second electrode 133 of the third light-emitting device 13c, the light-emitting material layer EML of the light-emitting structure 132 emits red light.

[0097] In this configuration, the pixel voltage of the first electrode 131 is provided by the pixel circuit 1, and the common voltage of the second electrode 133 is provided by the isolation structure 12. Specifically, the second electrode 133 is electrically connected to the isolation structure 12, and the common voltage is supplied to the second electrode 133 by providing the isolation structure 12. That is, the isolation structure 12 has the function of supplying a common voltage to the second electrode 133.

[0098] The display panel 100 further includes a first encapsulation layer, which includes a plurality of encapsulation portions 14. The encapsulation portions 14 are located on the side of the second electrode 133 facing away from the array substrate 11, and extend through the sidewall of the isolation structure 12 to the side of the isolation structure 12 facing away from the array substrate 11. The plurality of encapsulation portions 14 include a plurality of first encapsulation portions 14a corresponding to a plurality of first light-emitting devices 13a, a plurality of second encapsulation portions 14b corresponding to a plurality of second light-emitting devices 13b, and a plurality of third encapsulation portions 14c corresponding to a plurality of third light-emitting devices 13c. The first encapsulation portions 14a are disposed on the side of the corresponding first light-emitting device 13a facing away from the array substrate 11, the second encapsulation portions 14b are disposed on the side of the corresponding second light-emitting device 13b facing away from the array substrate 11, and the third encapsulation portions 14c are disposed on the side of the corresponding third light-emitting device 13c facing away from the array substrate 11.

[0099] For example, Figure 8 A schematic diagram of the encapsulation section in a display panel is shown, with reference to... Figure 8 The encapsulation part includes a first segment 51 and a second segment 52 that are connected to each other. The first segment 51 is located inside the isolation opening 30 and is disposed on the side of the light-emitting unit 41 away from the substrate 1. The second segment 52 is located on the side of the isolation structure 3 facing the isolation opening 30. The surface of the first segment 51 away from the substrate 1 and the surface of the second segment 52 away from the isolation structure 3 are at least partially connected to each other to enclose and form a gap space 500.

[0100] For example, the side surface of the first segment 51 facing away from the substrate 1 and the side surface of the second segment 52 facing away from the isolation structure 3 may not be connected.

[0101] Figure 9 It shows Figure 1 A schematic diagram of another portion of the film layer cross-section structure in the BB direction of a local area of ​​the display panel, as shown below. Figure 9 As shown, the display panel 100 further includes a second encapsulation layer 15 and a third encapsulation layer 16. The second encapsulation layer 15 covers the isolation structure 12 and the encapsulation portion 14, and the third encapsulation layer 16 covers the second encapsulation layer 15. Both the first encapsulation layer and the third encapsulation layer 16 are inorganic materials, and the materials of the first encapsulation layer and the third encapsulation layer 16 include at least one of silicon nitride (SiN), silicon oxide (SiO), and silicon oxynitride (SiON). The second encapsulation layer 15 is an organic insulating material, such as epoxy resin, acrylic resin, or other resin materials. The second encapsulation layer 15 and the third encapsulation layer 16 are continuously disposed at least over the entire display area AA, with a portion of them also disposed in the bezel area NA.

[0102] The display panel 100 may also include at least one film layer such as a touch layer, a polarizer, a color filter substrate, and a protective cover. This film layer may also be bonded to the display panel via an adhesive layer such as OCA (Optical Clear Adhesive).

[0103] The manufacturing method of the display panel 100 according to the embodiments of this application will be described below. Figure 10 A flowchart illustrating a method for manufacturing a display panel is shown, with reference to... Figure 10 The manufacturing method of the display panel 100 includes:

[0104] S11 provides an array substrate.

[0105] S12, an isolation structure is formed on one side of the array substrate. The isolation structure has multiple isolation openings, including multiple first isolation openings, multiple second isolation openings and multiple third isolation openings.

[0106] S13, fabricate the film layer of the first light-emitting device, the film layer of the first light-emitting device includes the light-emitting structure layer and the second electrode layer of the first light-emitting device.

[0107] S14, fabricate the first encapsulation layer of the first light-emitting device. Since the film layer and the first encapsulation layer of the first light-emitting device are both fabricated as a single layer, the film layer and the first encapsulation layer of the first light-emitting device are present at the locations of the multiple first isolation openings, the multiple second isolation openings, and the multiple third isolation openings.

[0108] S15, etching removes the film layer and first encapsulation layer of the first light-emitting device at the locations of the multiple second isolation openings and the multiple third isolation openings, thereby forming the light-emitting structure and second electrode of the first light-emitting device, as well as the first encapsulation portion of the first light-emitting device, only at the locations of the multiple first isolation openings.

[0109] Based on the above steps S13 to S14, refer to Figure 2 The light-emitting structure 132 and the second electrode 133 of the second light-emitting device 13b and the first encapsulation part 14b of the second light-emitting device 13b are respectively provided at the positions of multiple second isolation openings 12a2. The light-emitting structure 132 and the second electrode 133 of the third light-emitting device 13c and the first encapsulation part 14c of the third light-emitting device 13c are respectively provided at the positions of multiple third isolation openings 12a3.

[0110] As mentioned in the background section, existing display panels have high power consumption, which affects their battery life.

[0111] To address the aforementioned problems, embodiments of the present invention provide a method for driving a display panel. Figure 11 This is a flowchart of a display panel driving method according to an embodiment of the present invention. Figure 12 This is a schematic diagram of a sub-pixel provided according to an embodiment of the present invention, with reference to... Figure 11 and Figure 12 The display panel includes multiple sub-pixels SPX, each sub-pixel SPX includes a pixel circuit 011 and a light-emitting device 13. The first end of the light-emitting device 13 is connected to the pixel circuit 011, and the second end of the light-emitting device 13 is used to receive a first power supply voltage ELVSS.

[0112] The driving methods for the display panel include:

[0113] S110. Determine the current working status of the display panel.

[0114] Specifically, the display panel determines its current operating state based on the received trigger signal. For example, if the display panel receives a gamma debugging trigger signal, it determines that the current operating state is gamma debugging state; if the display panel receives a panel use trigger signal, it determines that the current operating state is non-gamma debugging state.

[0115] S120. Determine the first power supply voltage used by the display panel based on the current working state; wherein, the absolute value of the first power supply voltage used by the display panel when the current working state is gamma adjustment state is greater than the absolute value of the first power supply voltage used by the display panel when the current working state is not gamma adjustment state.

[0116] The non-gamma debugging state refers to the state when the display panel is displaying the image normally. The display panel includes multiple sub-pixels (SPX), which can have at least three different emission colors. For example, the display panel includes at least blue, green, and red sub-pixels. The pixel circuit 011 can include multiple thin-film transistors (TFTs) and at least one capacitor. For example, the pixel circuit 011 can be a circuit structure in the form of 2T1C, 3T1C, 4T1C, 5T1C, 5T2C, 6T1C, 7T1C, 8T1C, 9T2C, etc. In the above circuit structures, T refers to a thin-film transistor, C refers to a capacitor, the number before T represents the number of TFTs in the pixel circuit 011, and the number before C represents the number of capacitors in the pixel circuit 011. In some examples, the multiple TFTs in the pixel circuit 011 can include P-type TFTs and N-type TFTs.

[0117] The pixel circuit 011 includes a driving module 022, a data writing module 027, a storage module 028, a threshold compensation module 023, a first light-emitting control module 261, a second light-emitting control module 262, a first initialization module 021, a second initialization module 025, and a third initialization module 024. The first light-emitting control module 261, the driving module 022, and the second light-emitting control module 262 are connected in series between a second power supply terminal and a first terminal of the light-emitting device 13. The second terminal of the light-emitting device 13 is connected to the first power supply terminal. The first power supply voltage ELVSS applied to the first power supply terminal and the fourth power supply voltage ELVDD applied to the second power supply terminal jointly control the driving module 022 in the pixel circuit 011 to operate in the saturation region. After the driving module 022 enters the saturation region, the current through the driving module 022 will no longer change with the voltage change between the first and second terminals of the driving module 022; wherein, the first terminal of the driving module 022 is connected to the first light-emitting control module 261, and the second terminal of the driving module 022 is connected to the second light-emitting control module 262. In the prior art, the first power supply voltage ELVSS in the non-gamma debugging state is the same as that in the gamma debugging state, resulting in higher power consumption of the display panel in the non-gamma debugging state. The inventors discovered that, to allow for compensation margin in the display panel, the maximum target display brightness at the preset display brightness level is set greater in the gamma debugging state than the maximum preset display brightness at the preset display brightness level in the non-gamma debugging state. Furthermore, as shown by the output characteristic curve of the driver module 022, the higher the voltage difference between the third and first terminals of the driver module 022, the greater the voltage difference between the first and second terminals that control the driver module 022 to enter the saturation region. The third terminal of the driver module 022 is connected to the storage module 028.

[0118] Therefore, in gamma adjustment mode, due to the larger maximum target display brightness, a larger voltage difference is required between the third and first terminals of the drive module 022. With the fourth power supply voltage ELVDD unchanged, a larger absolute value of the first power supply voltage ELVSS is needed to ensure the drive module 022 enters the saturation region. In non-gamma adjustment mode, due to the smaller maximum preset display brightness, setting a smaller absolute value of the first power supply voltage ELVSS while keeping the fourth power supply voltage ELVDD unchanged ensures the drive module 022 operates in the saturation region. If the first power supply voltage ELVSS used in gamma adjustment mode is used in non-gamma adjustment mode, although it allows the drive module 022 to operate in the saturation region, it results in higher power consumption for the display panel. Therefore, setting the absolute value of the first power supply voltage ELVSS used in the non-gamma adjustment mode to be smaller than the absolute value used in the gamma adjustment mode reduces the power consumption of the display panel while ensuring the drive module 022 operates in the saturation region and that the display panel displays the preset brightness.

[0119] The display panel driving method provided in this embodiment of the invention increases the first power supply voltage ELVSS applied to the first power supply terminal in the non-gamma debugging state by setting the absolute value of the first power supply voltage used by the display panel when the current working state is gamma debugging state to be greater than the absolute value of the first power supply voltage used by the display panel when the current working state is non-gamma debugging state. This can reduce the power consumption of the display panel while ensuring that the driving module 22 works in the saturation region, that is, while ensuring that the display panel displays the preset display brightness.

[0120] This embodiment is based on the above embodiment and optimizes it. Specifically, before the step "determine the display brightness level currently used by the display panel according to the current working state", a step "determine the display brightness level currently used by the display panel" is added, and the step "determine the display panel's first power supply voltage according to the current working state" is optimized to "determine the display panel's first power supply voltage according to the current working state and the currently used display brightness level". Figure 13 This is a flowchart of another display panel driving method provided according to an embodiment of the present invention, see reference. Figure 13 The driving methods include:

[0121] S210. Determine the current working status of the display panel.

[0122] Specifically, this step has the same function as step S110, and will not be described again here.

[0123] S220. Determine the current display brightness level used by the display panel.

[0124] Specifically, to meet display requirements under different ambient brightness conditions, display panels typically have multiple display brightness levels (DBV). The minimum display brightness at each level is 0, while the maximum display brightness varies. The total number of grayscale levels displayed is the same across all brightness levels; for example, each can display 0-255 grayscale levels. The brightness corresponding to the same grayscale level differs across different brightness levels.

[0125] S230. Determine the first power supply voltage used by the display panel based on the current operating status and the current display brightness level.

[0126] Specifically, if the current working state is gamma adjustment state, the first power supply voltage used by the display panel is determined according to the currently used display brightness level and the pre-determined correspondence between the preset display brightness level and the first power supply voltage under gamma adjustment state; if the current working state is non-gamma adjustment state, the first power supply voltage used by the display panel is determined according to the currently used display brightness level and the pre-determined correspondence between the preset display brightness level and the first power supply voltage under non-gamma adjustment state.

[0127] The display panel driving method provided in this embodiment of the invention determines the current working state and the currently used display brightness level of the display panel, and determines the first power supply voltage used by the display panel based on the current working state and the currently used display brightness level. This enables adaptive adjustment of the first power supply voltage according to different working states and different display brightness levels. Under at least some different display brightness levels, it ensures that the driving module has just entered the saturation region, that is, under the condition that the display panel displays the preset display brightness, it avoids increasing the power consumption of the display panel due to the absolute value of the first power supply voltage being too large at some display brightness levels, thereby further reducing the power consumption of the display panel.

[0128] Furthermore, under the same operating conditions, the first power supply voltage used by the display panel is different at at least some different display brightness levels; wherein, the smaller the display brightness level, the smaller the absolute value of the first power supply voltage used by the display panel.

[0129] Specifically, the fact that the first power supply voltage used by the display panel is different at least some different display brightness levels can be understood as the first power supply voltage being different at all different display brightness levels, or the first power supply voltage being different at some different display brightness levels and the first power supply voltage being the same at some different display brightness levels.

[0130] Furthermore, under the same operating conditions, the first power supply voltage used by the display panel is different for different display brightness levels; or, under the same operating conditions, the first power supply voltage used by the display panel is different for different display brightness level ranges, and the first power supply voltage used by the display panel is the same for the same display brightness level range; wherein, the smaller the display brightness level within the display brightness level range, the smaller the absolute value of the first power supply voltage used by the display panel corresponding to the display brightness level range.

[0131] Specifically, since the maximum display brightness of the display panel is different under different display brightness levels, the first power supply voltage used by the display panel is different under the same working state. This allows the first power supply voltage corresponding to each display brightness level to adapt to the display requirements of that display brightness level, ensuring that the display brightness of each display brightness level meets the display requirements. It also ensures that the driving module just begins to enter the saturation region at each display brightness level, further reducing the power consumption of the display panel.

[0132] In addition, since the maximum display brightness of the display panel is similar and the applicable first power supply voltage is similar under adjacent display brightness levels, the first power supply voltage used by the display panel is different under different display brightness level ranges under the same working state, and the first power supply voltage used by the display panel is the same under the same display brightness level range. This can reduce the driving difficulty of the display panel, and at the same time reduce the power consumption of the display panel while ensuring that the display brightness under different display brightness level ranges meets the display requirements.

[0133] Furthermore, determining the first power supply voltage used by the display panel based on the current operating state and the currently used display brightness level includes:

[0134] The first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each operating state.

[0135] Wherein, "at least two" can be understood as two or more, for example, in each predetermined working state, two or more preset display brightness levels corresponding to the first power supply voltage.

[0136] Specifically, when the current working state is gamma adjustment state, if there is a display brightness level that is the same as the current display brightness level among the preset display brightness levels stored in the display panel, the first power supply voltage corresponding to the preset display brightness level can be directly determined as the first power supply voltage used by the display panel; if there is no display brightness level that is the same as the current display brightness level among the preset display brightness levels stored in the display panel, the first power supply voltage corresponding to the current display brightness level can be determined by interpolation, and the first power supply voltage is determined as the first power supply voltage used by the display panel.

[0137] When the current working state is non-gamma adjustment state, if there is a display brightness level that is the same as the current display brightness level in the preset display brightness levels stored in the display panel, the first power supply voltage corresponding to the preset display brightness level can be directly determined as the first power supply voltage used by the display panel; if there is no display brightness level that is the same as the current display brightness level in the preset display brightness levels stored in the display panel, the first power supply voltage corresponding to the current display brightness level can be determined by interpolation, and the first power supply voltage can be determined as the first power supply voltage used by the display panel.

[0138] The first power supply voltage used by the display panel is determined based on the first power supply voltage corresponding to at least two preset display brightness levels under each predetermined working state. Under the condition that the display brightness meets the display requirements under different display brightness levels, the storage amount of the first power supply voltage is reduced, and the storage space of the display panel is reduced.

[0139] Optionally, the first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each operating state, including:

[0140] Based on the current operating state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each operating state, the first power supply voltage used by the display panel is determined by interpolation.

[0141] Specifically, when the current operating state is gamma adjustment mode, two preset display brightness levels adjacent to the current display brightness level can be determined first. Then, the first power supply voltage corresponding to the current display brightness level is determined by interpolation based on the first power supply voltage corresponding to the two preset display brightness levels adjacent to the current display brightness level, and this first power supply voltage is determined as the first power supply voltage used by the display panel. When the current operating state is not gamma adjustment mode, two preset display brightness levels adjacent to the current display brightness level can be determined first. Then, the first power supply voltage corresponding to the current display brightness level is determined by interpolation based on the first power supply voltage corresponding to the two preset display brightness levels adjacent to the current display brightness level, and this first power supply voltage is determined as the first power supply voltage used by the display panel. Using the interpolation method to determine the first power supply voltage can quickly and accurately determine the first power supply voltage corresponding to the current display brightness level while reducing the amount of first power supply voltage storage required.

[0142] This embodiment is based on the above embodiment and optimizes it. Specifically, before the step "determine the first power supply voltage used by the display panel according to the current working state", the step "determine the display brightness level currently used by the display panel and the grayscale to be displayed for each sub-pixel in the display panel" is added, and the step "determine the first power supply voltage used by the display panel according to the current working state" is optimized to "determine the first power supply voltage used by the display panel according to the current working state, the currently used display brightness level and the grayscale to be displayed". Figure 14 This is a flowchart of another display panel driving method provided according to an embodiment of the present invention, see reference. Figure 14 The driving methods include:

[0143] S310. Determine the current working status of the display panel.

[0144] Specifically, this step has the same function as step S110, and will not be described again here.

[0145] S320. Determine the current display brightness level of the display panel and the grayscale to be displayed for each sub-pixel in the display panel.

[0146] Specifically, the grayscale to be displayed for a sub-pixel is the grayscale corresponding to the sub-pixel in the image to be displayed, that is, the grayscale that the sub-pixel will display.

[0147] S330. Determine the first power supply voltage used by the display panel based on the current working status, the currently used display brightness level, and the grayscale to be displayed.

[0148] Specifically, if the current working state is gamma adjustment state, the first power supply voltage used by the display panel is determined based on the currently used display brightness level, the grayscale to be displayed, and the pre-determined correspondence between the preset display brightness level and preset display grayscale in the gamma adjustment state and the first power supply voltage; if the current working state is not gamma adjustment state, the first power supply voltage used by the display panel is determined based on the currently used display brightness level, the grayscale to be displayed, and the pre-determined correspondence between the preset display brightness level and preset display grayscale in the non-gamma adjustment state and the first power supply voltage.

[0149] The display panel driving method provided in this embodiment of the invention determines the current display brightness level of the display panel and the grayscale to be displayed for each sub-pixel in the display panel, and determines the first power supply voltage used by the display panel based on the current working state, the current display brightness level, and the grayscale to be displayed. This enables more precise adjustment of the first power supply voltage corresponding to different display brightness levels and grayscale to be displayed under different working states, further avoiding the impact of excessively large absolute values ​​of the first power supply voltage on the power consumption of the display panel under some display brightness levels and some grayscale to be displayed, and further reducing the power consumption of the display panel.

[0150] Furthermore, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel is different for at least some different grayscale levels to be displayed; wherein, under the same operating conditions and at the same display brightness level, the smaller the grayscale level to be displayed, the smaller the absolute value of the first power supply voltage used by the display panel.

[0151] Specifically, the first power supply voltage used by the display panel is different for at least some different gray levels to be displayed. This can be understood as the first power supply voltage used is different for all different gray levels to be displayed, or the first power supply voltage used is different for some different gray levels to be displayed, and the first power supply voltage used is the same for some different gray levels to be displayed.

[0152] Optionally, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel may be different for different grayscale levels to be displayed; or, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel may be different for different grayscale ranges to be displayed, while the first power supply voltage used by the display panel may be the same for the same grayscale range to be displayed; wherein, under the same operating conditions and at the same display brightness level, the smaller the grayscale level to be displayed within the grayscale range, the smaller the absolute value of the first power supply voltage used by the display panel corresponding to the grayscale range to be displayed.

[0153] Specifically, under the same operating conditions and at the same brightness level, different first power supply voltages are used for different grayscale levels to be displayed. This allows for individual adjustment of the first power supply voltage for each grayscale level while ensuring the brightness meets display requirements. This ensures the driving module just begins to enter the saturation zone at each grayscale level, further reducing the power consumption of the display panel. Conversely, under the same operating conditions and at the same brightness level, different first power supply voltages are used for different grayscale ranges, meaning the brightness varies significantly across different grayscale ranges. In this case, different first power supply voltages reduce power consumption while ensuring the brightness meets display requirements across all grayscale ranges. Furthermore, using the same first power supply voltage for the same grayscale range reduces the difficulty of driving the display panel.

[0154] Furthermore, based on the current operating status, the currently used display brightness level, and the grayscale to be displayed, the first power supply voltage used by the display panel is determined, including:

[0155] The equivalent display grayscale of the display panel is determined based on the grayscale to be displayed for each sub-pixel, and the first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, and the equivalent display grayscale; or, the first power supply voltage used by each sub-pixel is determined based on the current working state, the currently used display brightness level, and the grayscale to be displayed for each sub-pixel.

[0156] Specifically, the equivalent display grayscale of the display panel can be determined based on the average value of the grayscale to be displayed for all sub-pixels. When the current operating state is gamma adjustment mode, the first power supply voltage used by the display panel is determined based on the currently used display brightness level, the equivalent display grayscale, and the pre-determined correspondence between the preset display brightness level and preset display grayscale in gamma adjustment mode and the first power supply voltage. When the current operating state is not gamma adjustment mode, the first power supply voltage used by the display panel is determined based on the currently used display brightness level, the equivalent display grayscale, and the pre-determined correspondence between the preset display brightness level and preset display grayscale in non-gamma adjustment mode and the first power supply voltage. Determining the first power supply voltage based on the equivalent display grayscale ensures that the entire display panel uses the same first power supply voltage, reducing driving and wiring complexity.

[0157] When the entire display panel uses the same first power supply voltage, all sub-pixels of the display panel can be connected to the same first power line, and the first power supply voltage can be provided to the sub-pixels through this first power line. When different sub-pixels require different first power supply voltages, different first power lines can be connected to the different sub-pixels.

[0158] After determining the first power supply voltage for each sub-pixel based on the current operating state, the current display brightness level, the grayscale to be displayed for each sub-pixel, and the pre-determined correspondence between the preset display brightness level and preset display grayscale and the first power supply voltage under different operating states, the first power supply voltage is output to the corresponding sub-pixel through different power lines connected to different sub-pixels. By determining the first power supply voltage for the display panel based on the grayscale to be displayed for each sub-pixel, more precise adjustments to the first power supply voltage for each sub-pixel are achieved under different operating states, based on different display brightness levels and different grayscale to be displayed. This further reduces the power consumption of the display panel while ensuring that the display panel displays the preset display brightness.

[0159] Furthermore, based on the current operating status, the currently used display brightness level, and the grayscale to be displayed, the first power supply voltage used by the display panel is determined, including:

[0160] The first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined working state.

[0161] Among them, "at least two" can be understood as two or more. For example, in each working state, the first power supply voltage corresponding to two or more preset display grayscale levels under two or more preset display brightness levels is predetermined.

[0162] Specifically, when the current working state is gamma adjustment state, if there is a display brightness level that is the same as the current display brightness level among the preset display brightness levels stored in the display panel, and there is a display grayscale that is the same as the grayscale to be displayed among the preset display grayscales stored in the display panel, then the first power supply voltage corresponding to the preset display brightness level and the preset display grayscale can be directly determined as the first power supply voltage used by the display panel; if there is no display brightness level that is the same as the current display brightness level among the preset display brightness levels stored in the display panel, and / or there is no display grayscale that is the same as the grayscale to be displayed among the preset display grayscales stored in the display panel, then the first power supply voltage corresponding to the current display brightness level and the grayscale to be displayed can be determined by interpolation, and this first power supply voltage is determined as the first power supply voltage used by the display panel.

[0163] When the current operating state is non-gamma adjustment state, if there is a display brightness level that is the same as the current display brightness level among the preset display brightness levels stored in the display panel, and there is a display grayscale that is the same as the grayscale to be displayed among the preset display grayscales stored in the display panel, then the first power supply voltage corresponding to the preset display brightness level and the preset display grayscale can be directly determined as the first power supply voltage used by the display panel; if there is no display brightness level that is the same as the current display brightness level among the preset display brightness levels stored in the display panel, and / or there is no display grayscale that is the same as the grayscale to be displayed among the preset display grayscales stored in the display panel, then the first power supply voltage corresponding to the current display brightness level and the grayscale to be displayed can be determined by interpolation, and this first power supply voltage is determined as the first power supply voltage used by the display panel.

[0164] The first power supply voltage used by the display panel is determined based on the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display gray levels in each predetermined working state. Under the condition that the display brightness meets the display requirements under different display brightness levels and different display gray levels, the storage amount of the first power supply voltage is reduced, and the storage space of the display panel is reduced.

[0165] Optionally, the first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined operating state, including:

[0166] Based on the current operating state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined operating state, the first power supply voltage used by the display panel is determined by interpolation.

[0167] Specifically, if there is no display brightness level identical to the current display brightness level among the preset display brightness levels stored in the display panel, but there is a display grayscale identical to the grayscale to be displayed among the preset display grayscale levels stored in the display panel, the first power supply voltage corresponding to the current display brightness level under the grayscale to be displayed can be determined by interpolation of the first power supply voltages corresponding to the two preset display brightness levels adjacent to the current display brightness level under the grayscale to be displayed. This first power supply voltage corresponding to the current display brightness level under the grayscale to be displayed is then determined as the first power supply voltage used by the display panel. Similarly, if there is a display brightness level identical to the current display brightness level among the preset display brightness levels stored in the display panel, but there is no display grayscale identical to the grayscale to be displayed among the preset display grayscale levels stored in the display panel, the first power supply voltage corresponding to the grayscale to be displayed under the current display brightness level can be determined by interpolation of the first power supply voltages corresponding to the two preset display grayscale levels adjacent to the grayscale to be displayed under the current display brightness level. This first power supply voltage corresponding to the grayscale to be displayed under the current display brightness level is then determined as the first power supply voltage used by the display panel. If there is no display brightness level identical to the current display brightness level among the preset display brightness levels stored in the display panel, and there is also no display grayscale identical to the grayscale to be displayed among the preset display grayscales stored in the display panel, then the first power supply voltage corresponding to the two preset display grayscales adjacent to the grayscale to be displayed at the current display brightness level can be determined firstly by interpolating the first power supply voltages corresponding to the two preset display brightness levels adjacent to the current display brightness level. Then, the first power supply voltage for the grayscale to be displayed at the current display brightness level can be determined by interpolating the first power supply voltages corresponding to the two preset display grayscales adjacent to the grayscale to be displayed at the current display brightness level. This first power supply voltage for the grayscale to be displayed at the current display brightness level is then determined as the first power supply voltage used by the display panel. Using interpolation to determine the first power supply voltage reduces the amount of first power supply voltage storage required while quickly and accurately determining the first power supply voltage corresponding to the current display brightness level and the grayscale to be displayed.

[0168] Furthermore, the display panel includes at least two different light-emitting color sub-pixels;

[0169] At least some of the different emitting color sub-pixels correspond to different first power supply voltages.

[0170] "At least two" can be understood as two or more. For example, the display panel may include three different light-emitting color sub-pixels, namely blue sub-pixels, green sub-pixels and red sub-pixels.

[0171] Specifically, at least some of the different emitting color sub-pixels correspond to different first power supply voltages. This can be understood as all different first power supply voltages for different emitting color sub-pixels, or some different emitting color sub-pixels correspond to different first power supply voltages, while others correspond to the same first power supply voltage. Since the emitting characteristics of different emitting color sub-pixels are different, the driving voltages required for different emitting color sub-pixels are different. Therefore, the first power supply voltages required for different emitting color sub-pixels are not the same, meaning the voltage difference between the third and first terminals of the driving module in different emitting color sub-pixels is different, which in turn causes the voltage difference between the first and second terminals controlling the driving module to enter the saturation region to be different. Setting at least some of the different emitting color sub-pixels to have different first power supply voltages reduces the power consumption of the display panel while satisfying the emitting requirements of the different emitting color sub-pixels. For example, if the display panel includes blue, green, and red sub-pixels, then the absolute value of the first power supply voltage corresponding to the blue sub-pixel > the absolute value of the first power supply voltage corresponding to the red sub-pixel > the absolute value of the first power supply voltage corresponding to the green sub-pixel.

[0172] Optionally, different light-emitting color sub-pixels correspond to different first power supply voltages.

[0173] Specifically, since different light-emitting color sub-pixels have different light-emitting characteristics, the first power supply voltage corresponding to each sub-pixel is set differently. This allows for targeted setting of the first power supply voltage for different light-emitting color sub-pixels, further reducing the power consumption of the display panel while meeting the light-emitting requirements of each sub-pixel. For example, if the display panel includes blue, green, and red sub-pixels, then the absolute value of the first power supply voltage corresponding to the blue sub-pixel > the absolute value of the first power supply voltage corresponding to the red sub-pixel > the absolute value of the first power supply voltage corresponding to the green sub-pixel.

[0174] Furthermore, in the gamma adjustment state, the first power supply voltage used by the display panel is determined based on the first brightness data; in the non-gamma adjustment state, the first power supply voltage used by the display panel is determined based on the second brightness data; wherein, the first brightness data is the maximum brightness data of the display panel in the gamma adjustment state, and the second brightness data is the maximum brightness data of the display panel in the non-gamma adjustment state.

[0175] Specifically, before gamma adjustment, the driver chip is set to reserve a compensation margin for the display panel, requiring a grayscale number N to be reserved; and based on the first brightness Lv1 of the 255 grayscale levels before grayscale mapping, a suitable first power supply voltage is set in the driver chip; simultaneously, the second brightness after grayscale mapping, i.e., the first power supply voltage under (L255-N) grayscale levels, is preset in the driver chip; in gamma adjustment mode, the grayscale mapping function is off by default, and the driver chip selects the first power supply voltage corresponding to the first brightness Lv1 of the 255 grayscale levels to supply the display panel; in non-gamma adjustment mode, the grayscale mapping function is on, and the driver chip selects the first power supply voltage corresponding to (L255-N) grayscale levels to supply the display panel. The absolute value of the first power supply voltage used by the display panel in gamma adjustment mode is greater than the absolute value of the first power supply voltage used by the display panel in the current non-gamma adjustment mode.

[0176] Furthermore, determine the current operating status of the display panel, including:

[0177] The current working status is determined based on the received trigger signal.

[0178] Specifically, if the display panel receives a gamma debugging trigger signal, it determines the current working state as gamma debugging state based on the received gamma debugging trigger signal; if the display panel receives a panel use trigger signal, it determines the current working state as non-gamma debugging state based on the received panel use trigger signal.

[0179] Further reference Figure 2 The light-emitting device 13 includes a first electrode 131, a light-emitting structure 132, and a second electrode 133 stacked in sequence. The first electrode 131 is electrically connected to the pixel circuit 011, and the second electrode 133 is used to receive the first power supply voltage ELVSS.

[0180] The second electrodes 133 of different light-emitting devices are electrically connected to each other.

[0181] Specifically, when all sub-pixels of the entire display panel use the same first power supply voltage ELVSS, the second electrodes 133 of different light-emitting devices can be electrically connected to each other. Specifically, the isolation structures 12 of the isolation openings where different light-emitting devices are located can be electrically connected to each other to achieve the mutual electrical connection of the second electrodes 133 of different light-emitting devices.

[0182] Further reference Figure 2 ,

[0183] At least some of the second electrodes 133 of the light-emitting device 13 are insulated from each other.

[0184] The mutual insulation of the second electrodes 133 of at least some light-emitting devices 13 can be understood as the mutual insulation of the second electrodes 133 of different light-emitting devices 13, or the mutual insulation of the second electrodes 133 of some light-emitting devices 13, and the mutual electrical connection of the second electrodes 133 of some light-emitting devices 13. Mutual insulation of the second electrodes 133 can be achieved by insulating the isolation structures of the isolation openings where the second electrodes 133 that need to be mutually insulated are located, and mutual electrical connection of the second electrodes 133 that need to be electrically connected is achieved by connecting the isolation structures of the isolated openings where the second electrodes 133 are located.

[0185] Specifically, the second electrodes 133 of at least some of the light-emitting devices are set to be mutually insulated. Different first power supply voltages ELVSS can be provided to at least some of the light-emitting devices according to the current working state, the current display brightness level, and the grayscale to be displayed of different sub-pixels. This enables more precise adjustment of the first power supply voltage ELVSS corresponding to different display brightness levels according to different working states, different display brightness levels, and grayscale to be displayed, further reducing the power consumption of the display panel.

[0186] Optional, see reference Figure 2 and Figure 5 The display panel includes an array substrate 11 stacked in sequence and an isolation structure 12 disposed on one side of the array substrate 11;

[0187] The pixel circuit is disposed within the array substrate 11, and the isolation structure 12 encloses and forms a plurality of isolation openings 12a. The light-emitting device 13 is disposed in the isolation opening 12a. The isolation structure 12 is used to disconnect the second electrode 133 of the light-emitting device 13 in different isolation openings 12a, so that the second electrodes 133 of the light-emitting device 13 in at least some of the different isolation openings 12a are mutually insulated.

[0188] In this case, the second electrodes 133 of the light-emitting devices 13 in at least some of the different isolation openings 12a are insulated from each other. This can be understood as the light-emitting devices 13 in different isolation structures being insulated from each other, or the display panel is divided into regions, and the second electrodes 133 of the light-emitting devices 13 in the same region are electrically connected through the isolation structure 12, while the second electrodes 133 of the light-emitting devices 13 in different regions are insulated from each other through the isolation structure 12.

[0189] Specifically, by setting the second electrodes 133 of the light-emitting devices 13 in different isolation openings 12a of the isolation structure 12 to be disconnected, the second electrodes 133 of the light-emitting devices 13 in at least some of the different isolation openings 12a are mutually insulated. Thus, different first power supply voltages ELVSS can be provided to at least some of the light-emitting devices 13 according to the current working state, the current display brightness level, and the grayscale to be displayed of different sub-pixels. This enables more precise adjustment of the first power supply voltage ELVSS corresponding to different display brightness levels according to different working states, different display brightness levels, and grayscale to be displayed, further reducing the power consumption of the display panel.

[0190] This invention provides a method for driving a display panel. Figure 15 This is a flowchart of another display panel driving method provided according to an embodiment of the present invention, see reference. Figure 12 and Figure 15 The display panel includes multiple sub-pixels SPX. Each sub-pixel SPX includes a pixel circuit 011 and a light-emitting device 13. The first end of the light-emitting device 13 is connected to the pixel circuit 011, and the second end of the light-emitting device 13 is used to receive the power supply voltage.

[0191] The driving methods for the display panel include:

[0192] S410. Determine the maximum grayscale to be displayed on the display panel at the current display brightness level.

[0193] Specifically, the maximum grayscale to be displayed can be determined based on the grayscale to be displayed of each sub-pixel of the display panel at the current display brightness level.

[0194] S420. If the maximum grayscale to be displayed is greater than the preset grayscale and less than or equal to the maximum grayscale, then the power supply voltage used by the display panel is determined to be the second power supply voltage.

[0195] The preset display grayscale can be determined based on the compensation margin reserved for the display panel, which is preset in the driver chip before gamma debugging, i.e., the number of grayscale levels N to be reserved. For example, the preset display grayscale can be the difference between the maximum display grayscale and the reserved number of grayscale levels N. The maximum display grayscale can be 255 grayscale levels.

[0196] Specifically, if the maximum gray level to be displayed is greater than the preset gray level but less than or equal to the maximum gray level, it means that the maximum gray level to be displayed that the display panel needs to display is large, that is, the brightness of one or more sub-pixels in the display panel is large. In order to ensure that the display panel displays the preset brightness, the second power supply voltage ELVSS1 with the larger absolute value needs to be determined as the power supply voltage used by the display panel.

[0197] S430. If the maximum grayscale to be displayed is less than or equal to the preset grayscale, then the power supply voltage used by the display panel is determined to be the third power supply voltage; wherein, the absolute value of the second power supply voltage is greater than the absolute value of the third power supply voltage.

[0198] Specifically, if the maximum gray level to be displayed is less than or equal to the preset gray level, it means that the maximum gray level to be displayed that the display panel needs to display is small, that is, the brightness of all sub-pixels in the display panel is small. In this case, the third power supply voltage ELVSS2 with the smaller absolute value is determined as the power supply voltage used by the display panel, which can ensure that the display panel displays the preset brightness.

[0199] The driving method for the display panel provided in this embodiment of the invention determines the power supply voltage used by the display panel as a second power supply voltage when the maximum gray level to be displayed is greater than the preset gray level but less than or equal to the maximum gray level; and determines the power supply voltage used by the display panel as a third power supply voltage when the maximum gray level to be displayed is less than or equal to the preset gray level. This achieves the adjustment of the power supply voltage of the second terminal of the light-emitting device 13 according to the maximum gray level to be displayed in the display panel, so as to ensure that the driving module 22 works in the saturation region, that is, to reduce the power consumption of the display panel while ensuring that the display panel displays the preset display brightness.

[0200] This invention provides a driving device for a display panel. Figure 16 This is a schematic diagram of a driving device for a display panel according to an embodiment of the present invention. (Refer to...) Figure 16 The display panel includes multiple sub-pixels, each sub-pixel includes a pixel circuit and a light-emitting device, the first end of the light-emitting device is connected to the pixel circuit, and the second end of the light-emitting device is used to receive a first power supply voltage;

[0201] The display panel driving device 200 includes:

[0202] The working status determination module 210 is used to determine the current working status of the display panel;

[0203] The first power supply voltage determination module 220 is used to determine the first power supply voltage used by the display panel based on the current working state; wherein, the absolute value of the first power supply voltage used by the display panel when the current working state is gamma debugging state is greater than the absolute value of the first power supply voltage used by the display panel when the current working state is not gamma debugging state.

[0204] The display panel driving device provided in the embodiments of the present invention can execute the display panel driving method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0205] Figure 17This is a schematic diagram of a display device provided in an embodiment of the present invention. Another embodiment of the present invention provides a display device, see reference. Figure 17 The display device 101 includes a display panel 100 and a driving device 200 for the display panel as described in any embodiment of the present invention. The display device 101 can be an electronic device such as a mobile phone or a tablet computer.

[0206] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0207] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes a plurality of sub-pixels, each sub-pixel including a pixel circuit and a light-emitting device, the first end of the light-emitting device being connected to the pixel circuit, and the second end of the light-emitting device being used to receive a first power supply voltage; The driving methods for the display panel include: Determine the current working status of the display panel; The first power supply voltage used by the display panel is determined based on the current operating state; wherein, the absolute value of the first power supply voltage used by the display panel when the current operating state is gamma adjustment state is greater than the absolute value of the first power supply voltage used by the display panel when the current operating state is non-gamma adjustment state.

2. The driving method for the display panel according to claim 1, characterized in that, Determine the first power supply voltage used by the display panel based on the current operating state, which includes, prior to: Determine the current display brightness level used by the display panel; Determining the first power supply voltage used by the display panel based on the current operating state includes: The first power supply voltage used by the display panel is determined based on the current operating state and the currently used display brightness level.

3. The driving method for the display panel according to claim 2, characterized in that, Under the same operating conditions, the first power supply voltage used by the display panel is different for at least some of the different display brightness levels; wherein, the smaller the display brightness level, the smaller the absolute value of the first power supply voltage used by the display panel.

4. The driving method for the display panel according to claim 3, characterized in that, Under the same operating conditions, the first power supply voltage used by the display panel is different for different display brightness levels; or, under the same operating conditions, the first power supply voltage used by the display panel is different for different display brightness level ranges, and the first power supply voltage used by the display panel is the same for the same display brightness level range; wherein, the smaller the display brightness level within the display brightness level range, the smaller the absolute value of the first power supply voltage used by the display panel corresponding to the display brightness level range.

5. The driving method for a display panel according to claim 1, characterized in that, Determining the first power supply voltage used by the display panel based on the current operating state and the currently used display brightness level includes: The first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each working state. Preferably, the first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, and a predetermined first power supply voltage corresponding to at least two preset display brightness levels in each operating state, including: Based on the current operating state, the currently used display brightness level, and the first power supply voltage corresponding to at least two preset display brightness levels in each operating state, the first power supply voltage used by the display panel is determined by interpolation.

6. The driving method for a display panel according to claim 1, characterized in that, Determine the first power supply voltage used by the display panel based on the current operating state, which includes, prior to: Determine the current display brightness level of the display panel and the grayscale to be displayed for each sub-pixel in the display panel; Determining the first power supply voltage used by the display panel based on the current operating state includes: The first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, and the grayscale to be displayed.

7. The driving method for a display panel according to claim 6, characterized in that, Under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel is different for at least some of the different gray levels to be displayed; wherein, under the same operating conditions and at the same display brightness level, the smaller the gray level to be displayed, the smaller the absolute value of the first power supply voltage used by the display panel; Preferably, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel is different for different grayscale levels to be displayed; or, under the same operating conditions and at the same display brightness level, the first power supply voltage used by the display panel is different for different grayscale ranges to be displayed, and the first power supply voltage used by the display panel is the same for the same grayscale range to be displayed; wherein, under the same operating conditions and at the same display brightness level, the smaller the grayscale level to be displayed within the grayscale range, the smaller the absolute value of the first power supply voltage used by the display panel corresponding to the grayscale range to be displayed.

8. The driving method for a display panel according to claim 6, characterized in that, Determining the first power supply voltage used by the display panel based on the current operating state, the currently used display brightness level, and the grayscale to be displayed includes: The equivalent display grayscale of the display panel is determined based on the grayscale to be displayed for each sub-pixel, and the first power supply voltage used by the display panel is determined based on the current working state, the currently adopted display brightness level, and the equivalent display grayscale; or, the first power supply voltage used by each sub-pixel is determined based on the current working state, the currently adopted display brightness level, and the grayscale to be displayed for each sub-pixel.

9. The driving method for a display panel according to claim 6, characterized in that, Determining the first power supply voltage used by the display panel based on the current operating state, the currently used display brightness level, and the grayscale to be displayed includes: The first power supply voltage used by the display panel is determined based on the current working state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined working state. Preferably, the first power supply voltage used by the display panel is determined based on the current operating state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined operating state, including: Based on the current operating state, the currently used display brightness level, the grayscale to be displayed, and the first power supply voltage corresponding to at least two preset display brightness levels and at least two preset display grayscales in each pre-determined operating state, the first power supply voltage used by the display panel is determined by interpolation.

10. The driving method for a display panel according to claim 1, characterized in that, The display panel includes at least two different light-emitting color sub-pixels; At least some of the different emitting color sub-pixels correspond to different first power supply voltages; Preferably, the first power supply voltage is different for sub-pixels of different emitting colors.

11. The driving method for a display panel according to claim 1, characterized in that, In the gamma adjustment state, the first power supply voltage used by the display panel is determined based on the first brightness data; in the non-gamma adjustment state, the first power supply voltage used by the display panel is determined based on the second brightness data; wherein, the first brightness data is the maximum brightness data of the display panel in the gamma adjustment state, and the second brightness data is the maximum brightness data of the display panel in the non-gamma adjustment state.

12. The driving method for a display panel according to claim 1, characterized in that, Determine the current operating status of the display panel, including: The current working status is determined based on the received trigger signal.

13. The driving method for a display panel according to any one of claims 1-7, 9 or 11-12, characterized in that, The light-emitting device includes a first electrode, a light-emitting structure, and a second electrode stacked in sequence. The first electrode is electrically connected to the pixel circuit, and the second electrode is used to receive the first power supply voltage. The second electrodes of the different light-emitting devices are electrically connected to each other.

14. The driving method for a display panel according to any one of claims 1-12, characterized in that, The light-emitting device includes a first electrode, a light-emitting structure, and a second electrode stacked in sequence. The first electrode is electrically connected to the pixel circuit, and the second electrode is used to receive the first power supply voltage. At least some of the second electrodes of the light-emitting devices are mutually insulated; Preferably, the display panel includes an array substrate and an isolation structure disposed on one side of the array substrate, which are stacked sequentially. The pixel circuit is disposed within the array substrate, the isolation structure encloses and forms multiple isolation openings, and the light-emitting device is disposed within the isolation openings; The isolation structure is used to disconnect the second electrodes of the light-emitting devices in different isolation openings, so that the second electrodes of the light-emitting devices in at least some of the different isolation openings are mutually insulated.

15. A driving method for a display panel, characterized in that, The display panel includes multiple sub-pixels, each sub-pixel includes a pixel circuit and a light-emitting device, a first end of the light-emitting device is connected to the pixel circuit, and a second end of the light-emitting device is used to receive power supply voltage; The driving methods for the display panel include: Determine the maximum grayscale to be displayed on the display panel at the current display brightness level; If the maximum grayscale to be displayed is greater than the preset grayscale and less than or equal to the maximum grayscale, then the power supply voltage used by the display panel is determined to be the second power supply voltage. If the maximum grayscale to be displayed is less than or equal to the preset grayscale, then the power supply voltage used by the display panel is determined to be the third power supply voltage; wherein the absolute value of the second power supply voltage is greater than the absolute value of the third power supply voltage.

16. A driving device for a display panel, characterized in that, The display panel includes a plurality of sub-pixels, each sub-pixel including a pixel circuit and a light-emitting device, the first end of the light-emitting device being connected to the pixel circuit, and the second end of the light-emitting device being used to receive a first power supply voltage; The driving methods for the display panel include: The working status determination module is used to determine the current working status of the display panel; The first power supply voltage determination module is used to determine the first power supply voltage used by the display panel based on the current operating state; wherein, the absolute value of the first power supply voltage used by the display panel when the current operating state is gamma adjustment state is greater than the absolute value of the first power supply voltage used by the display panel when the current operating state is non-gamma adjustment state.

17. A display device, characterized in that, Includes a display panel and a driving device for the display panel as described in claim 16.

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