Method for determining display panel driving voltage, driver chip, and display panel

Abstract

The embodiments of the present application provide a method for determining the driving voltage of a display panel, a driving chip, and a display panel. The method for determining the driving voltage of a display panel includes: obtaining a target light-emitting driving current corresponding to the maximum brightness parameter in a target brightness parameter range; determining a target bipolar voltage drop of a driving transistor based on the target light-emitting driving current; the target light-emitting driving current and the target voltage drop satisfy the performance function of the driving transistor; and determining a first power supply voltage corresponding to the maximum brightness parameter in the target brightness parameter range based on the target bipolar voltage drop. The present application is conducive to reducing power consumption; it is conducive to ensuring that the driving transistor can operate in the saturation region and maintain the stable operation of the display panel. According to the performance function, the first power supply voltage corresponding to multiple brightness parameter ranges can be obtained. It is conducive to reducing the difficulty of obtaining the first power supply voltage and improving the feasibility of preparing a display panel that can dynamically adjust the first power supply voltage.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a method for determining a display panel driving voltage, a driving chip, and a display panel. Background Art

[0002] In display technology, reducing display panel power consumption by adjusting the drive voltage is crucial for its advancement. Currently, driver ICs support dynamic drive voltage adjustment. The power supply voltage that the pixel circuit receives is a type of drive voltage. To obtain a set of power supply voltages suitable for dynamic adjustment, the process typically involves measuring a range of data, including brightness, luminous drive current, and voltage drop across the driver transistor for different grayscale levels. During this process, the power supply voltage is considered to ensure the driver transistor operates in its saturation region. This approach is labor-intensive and inefficient. Summary of the Invention

[0003] In view of this, the present application provides a method for determining a display panel driving voltage, a driving chip, a display panel, and a display device to solve the above-mentioned problem.

[0004] In a first aspect, embodiments of the present application provide a method for determining a driving voltage of a display panel, wherein the display panel includes a plurality of pixel circuits and a plurality of light-emitting devices, wherein the pixel circuits include a driving transistor configured to generate a light-emitting driving current so that the pixel circuit drives the light-emitting device to emit light; when the driving transistor is configured to generate the light-emitting driving current, a first electrode of the driving transistor is electrically connected to a first electrode of the light-emitting device, and a second electrode of the driving transistor and a second electrode of the light-emitting device receive a first power supply voltage and a second power supply voltage, respectively; the method includes:

[0005] Obtaining a target light-emitting driving current corresponding to a maximum brightness parameter in a target brightness parameter range, where the target light-emitting driving current is the maximum of the light-emitting driving currents corresponding to different brightness parameters in the target brightness parameter range; the target brightness parameter range is one of a plurality of brightness parameter ranges;

[0006] Determining a target bipolar voltage drop of the driving transistor based on a target light-emitting driving current; the target light-emitting driving current and the target voltage drop satisfy a performance function of the driving transistor; the bipolar voltage drop is a voltage drop between a source and a drain of the driving transistor, and the performance function is a function of the light-emitting driving current generated by the driving transistor with respect to the bipolar voltage drop of the driving transistor;

[0007] According to the target bipolar voltage drop, a first power supply voltage corresponding to the maximum brightness parameter in the target brightness parameter range is determined.

[0008] In an implementation of the first aspect, the target brightness corresponding to the maximum brightness parameter in the target brightness parameter range and the corresponding target light-emitting driving current satisfy a first function, and the brightness corresponding to the maximum brightness parameter in multiple brightness parameter ranges and the corresponding preset light-emitting driving current satisfy the first function.

[0009] In an implementation manner of the first aspect, the multiple brightness parameter ranges are multiple grayscale ranges, or the multiple brightness parameter ranges are multiple dimming brightness value ranges.

[0010] In an implementation of the first aspect, obtaining a target light-emitting driving current corresponding to a maximum brightness parameter in a target brightness parameter range includes:

[0011] Determine a first function according to the brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current;

[0012] The target light-emitting driving current is determined according to the target brightness and the first function, where the target brightness is the brightness corresponding to the maximum brightness parameter in the target brightness parameter range.

[0013] In an implementation of the first aspect, determining the first function according to the brightness corresponding to the maximum brightness parameter in multiple brightness parameter ranges and the corresponding preset light driving current includes:

[0014] The first function is determined according to the maximum brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current.

[0015] In an implementation of the first aspect, the method further includes:

[0016] determining a performance function according to a preset bipolar voltage drop and a preset light-emitting driving current corresponding to a maximum brightness parameter in a plurality of brightness parameter ranges;

[0017] According to the target light-emitting drive current, determine the target bipolar voltage drop of the driving transistor, including:

[0018] Substituting the target light-emitting driving current into the performance function, the target bipolar voltage drop of the driving transistor is obtained.

[0019] In an implementation of the first aspect, the performance function is one of a linear function, a quadratic function, and a cubic function.

[0020] In an implementation of the first aspect, the display panel includes a plurality of light-emitting devices of different colors;

[0021] Determining a first power supply voltage corresponding to a maximum brightness parameter within a target brightness parameter range according to a target bipolar voltage drop includes:

[0022] Determining a target bipolar voltage drop with the largest absolute value among target bipolar voltage drops corresponding to light-emitting driving currents for driving a plurality of light-emitting devices of different colors;

[0023] A first power supply voltage corresponding to the maximum brightness parameter in the target brightness parameter range is determined according to the target bipolar voltage drop with the largest absolute value.

[0024] In an implementation of the first aspect, the target bipolar voltage drop Vds' having the largest absolute value and the first power supply voltage ELVSS corresponding to the maximum brightness parameter in the target brightness parameter range satisfy: ELVSS=ELVDD+Vds'-VOLED;

[0025] Wherein, ELVDD is the second power supply voltage, and VOLED is the voltage drop between the first electrode and the second electrode of the light-emitting device.

[0026] In a second aspect, an embodiment of the present application provides a driver chip, comprising a first power supply voltage obtained by the method provided in the first aspect.

[0027] In a third aspect, an embodiment of the present application provides a display panel driven by the driver chip provided in the second aspect.

[0028] In a fourth aspect, an embodiment of the present application provides a display device, comprising the display panel provided in the third aspect.

[0029] In an embodiment of the present application, a first power supply voltage used by the display panel when operating within the target brightness parameter range is determined based on the maximum brightness parameter in the target brightness parameter range. This is conducive to achieving a corresponding change in the first power supply voltage that drives the display panel when the brightness parameter changes, so that the changed first power supply voltage can meet the power supply usage requirements and reduce power consumption; at the same time, it is conducive to ensuring that after the first power supply voltage is changed, the driving transistor can still operate in the saturation region, stably generate the light-emitting driving current, and maintain the stable operation of the display panel.

[0030] Furthermore, by setting a performance function for the driving transistor to determine the first power supply voltage, the target bipolar voltage drop when the driving transistor operates in the saturation region can be guaranteed within the target brightness parameter range. Furthermore, the first power supply voltage corresponding to the maximum brightness parameter within the target brightness parameter range can be determined based on the potential relationship between the target bipolar voltage drop of the driving transistor and the first power supply voltage. Furthermore, based on the performance function, first power supply voltages corresponding to multiple brightness parameter ranges can be obtained. This reduces the difficulty of obtaining the first power supply voltage, avoids the need to perform extensive data testing after the display panel is manufactured before determining the first power supply voltage, improves the efficiency of obtaining the first power supply voltage that can reduce power consumption, allows for flexible confirmation of the first power supply voltage used by multiple display panels, and improves the feasibility of manufacturing display panels with dynamically adjustable first power supply voltages. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A schematic diagram of a display panel provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of a pixel circuit provided in an embodiment of the present application;

[0034] Figure 3 A flow chart of a method for determining a driving voltage provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of a working curve of a driving transistor provided in an embodiment of the present application;

[0036] Figure 5 A flow chart for determining a target light-emitting drive current provided in an embodiment of the present application;

[0037] Figure 6 A flow chart for obtaining a target bipolar voltage drop provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram of a working curve of another driving transistor provided in an embodiment of the present application;

[0039] Figure 8 Flowchart of another method for determining driving voltage provided in an embodiment of the present application

[0040] Figure 9A schematic diagram of a driver chip provided in an embodiment of the present application;

[0041] Figure 10 A schematic diagram of another display panel provided in an embodiment of the present application;

[0042] Figure 11 A schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0046] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0047] In the description of this specification, it is necessary to understand that the words "substantially", "approximately", "approximately", "about", "roughly", "generally" and the like described in the claims and embodiments of this application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0048] It should be understood that although the terms "first," "second," and so forth may be used in embodiments of the present application to describe poles, power supply voltages, and the like, these poles, power supply voltages, and the like should not be limited to these terms. These terms are merely used to distinguish poles, power supply voltages, and the like from one another. For example, a first pole could also be referred to as a second pole, and similarly, a second pole could also be referred to as a pole, without departing from the scope of the embodiments of the present application.

[0049] Figure 1 A schematic diagram of a display panel provided in an embodiment of the present application is shown. Figure 2 A schematic diagram of a pixel circuit provided in an embodiment of the present application is shown. Figure 3A flow chart of a method for determining a driving voltage provided in an embodiment of the present application is provided. Figure 4 This is a schematic diagram of a working curve of a driving transistor provided in an embodiment of the present application.

[0050] An embodiment of the present application provides a method for determining the driving voltage of the display panel 100. The driving voltage obtained by the present application can be pre-stored in a driver chip, and the driver chip can select to output the driving voltage obtained by the present application to the display panel 100 as needed when driving the display panel 100 to emit light.

[0051] like Figure 1 As shown, the display panel 100 includes a plurality of pixel circuits 200 and a plurality of light emitting devices 300, Figure 2 As shown, the pixel circuit 200 includes a driving transistor Md, which is used to generate a light-emitting driving current Id so that the pixel circuit 200 drives the light-emitting device 300 to emit light; when the driving transistor Md is used to generate the light-emitting driving current Id, the first electrode of the driving transistor Md is electrically connected to the first electrode 3001 of the light-emitting device 300, and the second electrode of the driving transistor Md and the second electrode 3002 of the light-emitting device 300 receive the first power supply voltage ELVSS and the other receives the second power supply voltage ELVDD.

[0052] Optionally, the driving transistor Md is a P-type transistor.

[0053] Optionally, the first electrode of the driving transistor Md is a drain, and the second electrode is a source.

[0054] Optionally, the first electrode 3001 of the light emitting device 300 is an anode, and the second electrode 3002 is a cathode.

[0055] The following description will be made by taking an example where the potential of the first power voltage ELVSS is less than the zero reference potential and the second power voltage ELVDD is greater than the zero reference potential.

[0056] The power consumption when driving a light-emitting device 300 in the display panel to emit light can be approximated as W, where W = Id × (ELVDD - ELVSS). The power consumption of the display panel 100 can be reduced by reducing the voltage difference between the second power supply voltage ELVDD and the first power supply voltage ELVSS. Typically, this voltage difference is reduced by lowering the absolute value of the first power supply voltage ELVSS. Therefore, when the display brightness of the display panel 100 decreases, that is, when the light-emitting drive current Id decreases, setting ELVDD - ELVSS also decreases, effectively reducing the power consumption of the display panel 100. However, a small voltage difference between the second power supply voltage ELVDD and the first power supply voltage ELVSS may cause the drive transistor Md to fail to operate in the saturation region, thereby causing the pixel drive circuit to malfunction. Therefore, in order to ensure that the display panel 100 has low power consumption while ensuring the normal operation of the display panel 100, it is necessary to obtain a suitable first power supply voltage ELVSS through a large amount of measured data. The existing method of obtaining the first power supply voltage ELVSS is labor-intensive and can only be performed after the display panel 100 is manufactured, resulting in low work efficiency.

[0057] After research, the inventors of the present application have proposed a method for determining a driving voltage of the display panel 100 . Optionally, the driving voltage is the first power voltage ELVSS.

[0058] like Figure 3 As shown, the method includes:

[0059] S1: Obtain a target light-emitting driving current Id' corresponding to the maximum brightness parameter in the target brightness parameter range; the target light-emitting driving current Id' is the maximum of the light-emitting driving currents Id corresponding to different brightness parameters in the target brightness parameter range, and the target brightness parameter range is one of multiple brightness parameter ranges.

[0060] The brightness parameters are parameters corresponding to different luminous brightness of the display panel 100 , such as grayscale, dimming brightness value (DBV), etc.

[0061] To reduce the computing power of the driver chip, the minimum to maximum brightness parameters can be divided into multiple brightness parameter ranges. Multiple brightness parameter ranges are set, and each brightness parameter range has a corresponding first power supply voltage ELVSS. When the display brightness of the display panel 100 is within different brightness parameter ranges, the first power supply voltage ELVSS used to drive the display panel is also different; when the display brightness of the display panel 100 is within the corresponding brightness parameter range, the first power supply voltage ELVSS used to drive the display panel 100 is the same. For example, the 0-255 grayscale is divided into five brightness parameter ranges: [0, 50), [51, 100), [101, 150), [151, 200), and [201, 255]. For example, the 0-255 dimming brightness value is divided into five brightness parameter ranges: [0, 50), [51, 100), [101, 150), [151, 200), and [201, 255].

[0062] The target brightness parameter range is one of multiple brightness parameter ranges, and the present application is used to determine the first power supply voltage ELVSS corresponding to the target brightness parameter range. The method of the present application can determine the first power supply voltage ELVSS corresponding to any target brightness parameter range.

[0063] Combine Figure 3 and Figure 4 As shown, when the driving transistor Md is turned on, that is, when the driving transistor Md operates in the saturation zone D1, the driving transistor Md generates a light-emitting driving current Id. At this time, the second electrode of the driving transistor Md receives the second power supply voltage ELVDD, and the second electrode of the light-emitting device 300 receives the first power supply voltage ELVSS. Generally, the larger the value of the brightness parameters such as the grayscale and dimming brightness value, the higher the corresponding light-emitting brightness of the display panel 100. When the value of the brightness parameters such as the grayscale and dimming brightness value is larger, the larger the light-emitting driving current Id required to drive the light-emitting device 300 to emit light, that is, the larger the light-emitting driving current Id required to be generated by the driving transistor Md. It should be noted that, taking the driving transistor Md as a P-type transistor as an example, the source-drain voltage drop corresponding to the P-type driving transistor Md, that is, the bipolar voltage drop Vds, is a value less than 0, then in Figure 4 The -Vds represents the absolute value of the voltage drop Vds between the two electrodes of the driving transistor Md, and the -Id represents the absolute value of the light-emitting driving current Id.

[0064] In the pixel circuit 200, after the second electrode of the driving transistor Md receives the second power supply voltage ELVDD, the driving transistor Md generates a light-emitting driving current Id. The generated light-emitting driving current Id is output from the first electrode of the driving transistor Md to the light-emitting device 300. The second electrode 3002 of the light-emitting device 300 receives the first power supply voltage ELVSS. Therefore, between the second power supply voltage ELVDD and the first power supply voltage ELVSS, there exists a potential relationship of ELVDD-ELVSS=-Vds+VOLED, where VOLED represents the voltage drop between the first electrode 3001 and the second electrode 3002 of the light-emitting device 300. Therefore, it can be deduced that ELVSS=ELVDD+Vds'-VOLED. As can be clearly seen from the above formula, the voltage drop between the first and second electrodes of the driving transistor Md (i.e., the voltage drop Vds) is related to the first power supply voltage ELVSS. When the second power supply voltage ELVDD remains unchanged and the light-emitting driving current Id received by the light-emitting device 300 is stable, the smaller the absolute value of the first power supply voltage ELVSS is, the smaller the absolute value of the voltage drop Vds between the driving transistor Md is. Furthermore, based on the operating characteristics of the driving transistor Md, the smaller the absolute value of the voltage drop Vds across the driving transistor Md, the closer the operating state of the driving transistor Md approaches the cutoff region, and the smaller the light-emitting driving current Id generated by the driving transistor Md. Therefore, the first power supply voltage ELVSS required for the display panel 100 to operate within the target brightness parameter range must satisfy the following requirements: reducing the power consumption of the pixel circuit 200 (i.e., reducing the absolute value of the first power supply voltage ELVSS) and ensuring normal conduction of the driving transistor Md (i.e., ensuring that the driving transistor Md operates in the saturation region D1).

[0065] Additionally, Figure 2 The second power supply voltage writing module in the pixel circuit 200 represented in the figure is used to control the second power supply voltage ELVDD to be written into the second electrode of the driving transistor Md; the data voltage writing module is used to control the data voltage Vdata to be written into the driving transistor Md, and the data voltage Vdata can be used to control the value of the light-emitting driving current Id generated by the driving transistor Md; the first reset module is used to reset the gate of the driving transistor Md; and the second reset module is used to reset the first electrode 3001 of the light-emitting device 300.

[0066] In this method, a corresponding target light-emitting driving current Id' is obtained based on the maximum brightness parameter within the target brightness parameter range. Specifically, the value of the light-emitting driving current Id generated by the driving transistor Md when the maximum brightness parameter within the target brightness parameter range is obtained. When the target light-emitting driving current Id' is the maximum light-emitting driving current Id within the target brightness parameter range, the absolute value of the corresponding bipolar voltage drop Vds of the driving transistor Md is also the maximum within the target brightness parameter range. Therefore, the first power supply voltage ELVSS corresponding to the maximum bipolar voltage drop Vds is also the maximum first power supply voltage ELVSS within the target brightness parameter range. This maximum first power supply voltage ELVSS is fixed within the target brightness parameter range. Consequently, when the brightness parameter is reduced within the target brightness parameter range, the light-emitting driving current Id also decreases, and the brightness of the light-emitting device 300 decreases. Consequently, the absolute value of the bipolar voltage drop Vds of the driving transistor Md also decreases. However, the absolute value of the first power supply voltage ELVSS used within the target brightness parameter range is fixed and determined at the maximum brightness parameter within the target brightness parameter range, and does not decrease accordingly. Then, under any brightness parameter within the target brightness parameter range, the used first power voltage ELVSS can ensure that the driving transistor Md operates in the saturation region D1 .

[0067] S2: Determine a target bipolar voltage drop Vds' of the driving transistor Md according to the target light emitting driving current Id'; the target light emitting driving current and the target bipolar voltage drop Vds' satisfy the performance function y1 of the driving transistor Md.

[0068] The target voltage drop Vds' is the voltage drop between the driving transistor Md when the driving transistor Md can generate the target light-emitting driving current Id'. The performance function y1 is the relationship between the light-emitting driving current Id generated by the driving transistor Md and the voltage drop Vds' between the driving transistor Md and the target light-emitting driving current Id. ds The performance function y1 of the driving transistor Md can be obtained by actually measuring the driving transistor Md.

[0069] like Figure 4 As shown, the function curve corresponding to the performance function y1 of the driving transistor Md is located on the side of the pre-pinch-off curve y2 of the driving transistor Md close to the saturation region D1 in the curve diagram of the driving transistor Md. Since the target light-emitting driving current Id' and the target bipolar voltage drop Vds' satisfy the performance function y1 of the driving transistor Md, the target bipolar voltage drop Vds' of the driving transistor Md can be determined based on the target light-emitting driving current Id' and the performance function y1.

[0070] S3: Determine a first power supply voltage ELVSS corresponding to a target brightness parameter range according to the target bipolar voltage drop Vds′.

[0071] Since the target light-emitting driving current Id' is the maximum light-emitting driving current in the target brightness parameter range, the target bipolar voltage drop Vds' is the bipolar voltage drop Vds of the driving transistor Md with the largest absolute value in the target brightness parameter range. ds . As can be seen from the above-mentioned pixel circuit 200, the potential difference between the second power supply voltage ELVDD and the first power supply voltage ELVSS can be approximated as a cross-voltage value, and the cross-voltage value can be expressed as (ELVDD-ELVSS). The cross-voltage value can also be approximated as the sum of the absolute value of the voltage drop Vds between the two electrodes of the driving transistor Md and the voltage drop Voled between the first electrode 3001 and the second electrode 3002 of the light-emitting device 300. That is, the first power supply voltage ELVSS corresponding to the maximum brightness parameter in the target brightness parameter range can be expressed as ELVSS=ELVDD+Vds'-VOLED. Therefore, the first power supply voltage ELVSS corresponding to the target brightness parameter range can be determined based on the determined target voltage drop Vds', the second power supply voltage ELVDD, and the voltage drop VOLED of the light-emitting device 300.

[0072] In the embodiment of the present application, the first power supply voltage ELVSS used by the display panel 100 when operating within the target brightness parameter range is determined according to the maximum brightness parameter in the target brightness parameter range. This is conducive to achieving a corresponding change in the first power supply voltage ELVSS for driving the display panel 100 when the brightness parameter changes, so that the changed first power supply voltage ELVSS can meet the power usage requirements and reduce power consumption; at the same time, it is conducive to ensuring that after the first power supply voltage ELVSS is changed, the driving transistor Md can still operate in the saturation region, stably generate the light-emitting driving current Id, and maintain the stable operation of the display panel 100.

[0073] Furthermore, by determining the first power supply voltage ELVSS based on the performance function of the drive transistor Md, the target bipolar voltage drop Vds' when the drive transistor Md operates in the saturation region D1 can be guaranteed within the target brightness parameter range. Furthermore, the first power supply voltage ELVSS corresponding to the maximum brightness parameter within the target brightness parameter range can be determined based on the potential relationship between the target bipolar voltage drop Vds' of the drive transistor Md and the first power supply voltage ELVSS. Furthermore, based on the performance function y1, the first power supply voltage ELVSS corresponding to multiple brightness parameter ranges can be obtained. This reduces the difficulty of obtaining the first power supply voltage ELVSS and avoids the need to conduct extensive data testing after the display panel 100 is manufactured before determining the first power supply voltage ELVSS. This improves the efficiency of obtaining the first power supply voltage ELVSS that can reduce power consumption, allows for flexible confirmation of the first power supply voltage ELVSS for various display panels 100, and enhances the feasibility of manufacturing a display panel 100 with dynamically adjustable first power supply voltage ELVSS.

[0074] In one embodiment of the present application, the target brightness Lv' corresponding to the maximum brightness parameter within the target brightness parameter range and its corresponding target light-emitting driving current Id' satisfy a first function, and the brightness corresponding to the maximum brightness parameter within multiple brightness parameter ranges and its corresponding preset light-emitting driving current satisfy the first function. The preset light-emitting driving current is a light-emitting driving current Id that, at the maximum brightness parameter within one of the brightness parameter ranges, enables the light-emitting brightness of the light-emitting device 300 and the maximum brightness parameter to satisfy a gamma curve.

[0075] In the display panel 100, the light-emitting device 300 is driven by a light-emitting driving current Id generated by the driving transistor Md. Different light-emitting driving currents Id drive the light-emitting device 300 to emit light of different brightness. Generally, the greater the light-emitting driving current Id, the higher the brightness of the light-emitting device 300. The brightness of the light-emitting device 300 is related to the light-emitting driving current Id. Optionally, the target brightness Lv' corresponding to the maximum brightness parameter in the target brightness parameter range and the corresponding target light-emitting driving current Id' satisfy a first function. Optionally, the brightness corresponding to the maximum brightness parameter in multiple brightness parameter ranges and the corresponding preset light-emitting driving current satisfy the first function. Optionally, the first function is a linear relationship.

[0076] When determining the target light-emitting drive current Id' corresponding to the maximum brightness parameter within each brightness parameter range, the target brightness Lv' corresponding to the maximum brightness parameter within the target brightness parameter range and the first function can be used for confirmation. The target light-emitting current Id' corresponding to the maximum brightness parameter determined within each brightness parameter range is then substituted into the performance function y1 of the drive transistor Md to obtain the bipolar voltage drop Vds of the drive transistor Md. Furthermore, the first power supply voltage ELVSS corresponding to each brightness parameter range is determined based on the potential relationship between the bipolar voltage drop Vds of the drive transistor Md and the first power supply voltage ELVSS.

[0077] When the display panel 100 operates under a certain brightness parameter in any brightness parameter range, the display panel 100 uses the first power supply voltage ELVSS corresponding to the brightness parameter range to perform display operation.

[0078] In one embodiment of the present application, the multiple brightness parameter ranges are multiple grayscale ranges, or the multiple brightness parameter ranges are multiple dimming brightness value ranges.

[0079] In the display panel 100, the display brightness parameters of the display panel 100 include grayscale and dimming brightness value. Grayscale is the preset brightness level of the display panel 100 when displaying an image; dimming brightness value is the display brightness level of the display panel 100 after user adjustment. The user can switch the dimming brightness value according to the desired display brightness level of the display panel 100.

[0080] Optionally, each grayscale value is divided into different grayscale ranges, and different first power supply voltages ELVSS are determined. When the grayscale of the image displayed by the display panel 100 changes and the changed grayscale falls within a different grayscale range, that is, when the brightness level of the display panel 100 changes, the first power supply voltage ELVSS used by the display panel 100 is also adjusted to the first power supply voltage ELVSS corresponding to the current grayscale range. This achieves dynamic adjustment of the first power supply voltage ELVSS, reducing the power consumption of the display panel 100.

[0081] Optionally, each dimming brightness value is divided into different ranges, and different first power supply voltages ELVSS are determined within different dimming brightness value ranges. When a user adjusts the dimming brightness value of the display panel 100 and the dimming brightness value falls within a different dimming brightness value range, that is, when the display brightness level of the display panel 100 changes, the first power supply voltage ELVSS used by the display panel is also adjusted to the first power supply voltage ELVSS corresponding to the current dimming brightness value range. This facilitates dynamic adjustment of the first power supply voltage ELVSS and reduces power consumption of the display panel 100.

[0082] In the embodiment of the present application, a grayscale or dimming brightness value that can control the brightness of the display panel 100 is selected for brightness parameter division, and multiple brightness parameter ranges are set as multiple grayscale ranges or multiple dimming brightness value ranges. This facilitates setting the corresponding first power supply voltage ELVSS within different grayscale ranges or setting the corresponding first power supply voltage ELVSS within different dimming brightness value ranges. Furthermore, it is convenient to determine whether to use grayscale parameters or dimming brightness value parameters for brightness parameter division according to different display requirements, thereby improving the application flexibility of the method.

[0083] Figure 5 A flow chart for determining a target light-emitting drive current is provided in an embodiment of the present application.

[0084] In one embodiment of the present application, Figure 5 As shown, obtaining the target light-emitting driving current Id' corresponding to the maximum brightness parameter in the target brightness parameter range includes:

[0085] A1: Determine a first function according to the brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current.

[0086] The maximum brightness parameter in the plurality of brightness parameter ranges is the maximum grayscale value or the maximum dimming brightness value in each brightness parameter range. For example, when the brightness parameter ranges are divided according to grayscale, the first function can be determined based on the display brightness of the display panel 100 at the maximum grayscale, i.e., the grayscale value of 255, and the preset light driving current used to display the corresponding brightness.

[0087] Optionally, the first function is a linear function Lv=C*Id.

[0088] Wherein, Lv is the brightness corresponding to the brightness parameter, Id is the light-emitting driving current corresponding to the brightness parameter, and C is the slope of the first function.

[0089] Substituting the brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current into the above linear function, the slope C of the linear function is obtained, thereby determining the first function to be Lv=C*Id.

[0090] A2: Determine the target light-emitting driving current Id' according to the target brightness and the first function y1. The target brightness Lv' is the brightness corresponding to the maximum brightness parameter in the target brightness parameter range.

[0091] The corresponding target brightness Lv' is obtained according to the maximum brightness parameter in the target brightness parameter range, and the target brightness Lv obtained by the maximum brightness parameter in the target brightness parameter range is substituted into the first function Lv=C*Id to obtain the target light-emitting driving current Id' corresponding to the maximum brightness parameter in the target brightness parameter range.

[0092] Optionally, in each brightness parameter range, the brightness Lv and the light-emitting driving current Id corresponding to each brightness parameter both satisfy a first function Lv=C*Id.

[0093] In the embodiment of the present application, determining the first function facilitates determining the target light-emitting drive current Id' within different brightness parameter ranges by directly determining the corresponding target light-emitting drive current Id' based on the first function and the target brightness Lv' corresponding to the maximum brightness parameter. This helps reduce the amount of testing and improves work efficiency when determining the target light-emitting drive current Id' corresponding to different target brightness parameter ranges.

[0094] In one embodiment of the present application, continue to refer to Figure 5 As shown, determining a first function according to the brightness corresponding to the maximum brightness parameter in a plurality of brightness parameter ranges and the corresponding preset light-emitting driving current includes:

[0095] The first function is determined according to the maximum brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current.

[0096] Generally speaking, the larger the grayscale value, the greater the brightness, and the larger the dimming brightness value, the greater the brightness.

[0097] Optionally, when the brightness parameter range is divided according to grayscale or dimming brightness value, the maximum brightness corresponding to the maximum brightness parameter in multiple brightness parameter ranges is the brightness when the grayscale value of the display panel 100 is maximum and the dimming brightness value is maximum, and the first function is determined based on the brightness when the grayscale value is maximum and the dimming brightness value is maximum and the corresponding preset light-emitting driving current.

[0098] As described above, optionally, the first function is assumed to be a linear function Lv=C*Id.

[0099] Substituting the brightness when the grayscale value and the dimming brightness value are maximum and the corresponding preset light driving current into the above linear function, the slope C in the linear function can be determined, thereby determining the first function as Lv=C*Id.

[0100] Figure 6 A flow chart for obtaining a target bipolar voltage drop is provided in an embodiment of the present application.

[0101] In one embodiment of the present application, Figure 6 As shown, the method also includes:

[0102] E1: determining a performance function y1 according to a preset bipolar voltage drop and a preset light-emitting drive current corresponding to a maximum brightness parameter in a plurality of brightness parameter ranges;

[0103] refer to Figure 4 As shown in the figure, the pre-pinch-off curve y2 in the operating curve of the driving transistor Md shows that the absolute value of the voltage drop Vds across the driving transistor Md increases as the light-emitting driving current Id increases. At the same light-emitting driving current Id, the absolute value of the voltage drop Vds across the driving transistor Md when operating in the saturation region is greater than when operating in the variable resistance region D2.

[0104] Optionally, the performance function y1 is set to be an approximate Id=a·Vds 2 A quadratic function of .

[0105] Wherein, Id is the light-emitting driving current generated by the driving transistor Md, a is the quadratic term coefficient of the quadratic function, and Vds is the voltage drop between the electrodes of the driving transistor Md.

[0106] As much as possible, the performance function y1 is determined when the absolute value of the bipolar voltage drop Vds is large, that is, when the current amplitude is large. At this time, the coordinate points corresponding to the preset bipolar voltage drop and the preset light-emitting drive current corresponding to the maximum brightness parameter in the multiple brightness parameter ranges are located on the side of the pre-pinch-off curve y2 close to the saturation region D1. Then, the performance function obtained by substituting this coordinate point into the quadratic function is also located on the side of the pre-pinch-off curve y2 close to the saturation region D1.

[0107] When the target bipolar voltage drop Vds′ of the driving transistor Md is determined according to the performance function y1 , it is ensured that the driving transistor Md operates in the saturation region D1 .

[0108] From the above content, it can be seen that if the performance function y1 is determined, it is first necessary to determine the preset bipolar voltage drop and the preset light-emitting drive current coordinate point located in the saturation region D1. Optionally, the preset bipolar voltage drop is obtained by, under the maximum brightness parameter in a plurality of brightness parameter ranges, optionally, obtaining the data voltage Vdata received by the driving transistor Md when the grayscale value is maximum and the dimming brightness value is maximum. The data voltage Vdata is written into the gate of the driving transistor Md to control the preset light-emitting drive current generated by the driving transistor Md.

[0109] The source S, drain D, and gate G of the driving transistor Md meet V DS =V GS -Vth,(V GS =Vdata-ELVDD); where Vds is the voltage drop between the drain D and source S of the driving transistor Md, V GS is the voltage drop between the gate and source of the driving transistor, and Vth is the threshold voltage of the driving transistor Md. Optionally, when the source of the driving transistor Md receives the second power supply voltage ELVDD, the driving transistor Md is turned on to generate the light-emitting driving current Id.

[0110] According to the data voltage Vdata when the grayscale value is the largest and the dimming brightness value is the largest, the second power supply voltage ELVDD, the threshold voltage V th Determine the preset voltage drop across the electrodes.

[0111] The preset light-emitting driving current is determined by obtaining the light-emitting driving current Id generated by the driving transistor Md when the grayscale value is maximum and the dimming brightness value is maximum.

[0112] By substituting the preset bipolar voltage drop and the preset light-emitting driving current determined when the grayscale value and the dimming brightness value are maximum into the above quadratic function, the performance function y1 can be determined, and the performance function y1 is located in the saturation region D1.

[0113] Determining a target bipolar voltage drop Vds' of the driving transistor Md according to the target light emitting driving current Id' includes:

[0114] E2: Substitute the target light-emitting driving current Id' into the performance function y1 to obtain the target bipolar voltage drop Vds' of the driving transistor.

[0115] Optionally, when the adjusted brightness parameter is within the target brightness parameter range, the target light-emitting drive current Id' is determined based on the maximum brightness parameter within the target brightness parameter range and the first function. The target light-emitting drive current Id' is substituted into the performance function y1 located in the saturation region D1: Id = a·Vds 2 In the above, the target bipolar voltage drop Vds' of the driving transistor Md can be determined.

[0116] The first power supply voltage ELVSS corresponding to the target brightness parameter range is determined based on the determined potential relationship between the target bipolar voltage drop Vds' and the first power supply voltage ELVSS. Optionally, when the display panel 100 uses any brightness parameter within the target brightness parameter range, the same power supply voltage ELVSS determined above is used. This can reduce the absolute value of the first power supply voltage ELVSS to reduce power consumption, while ensuring that the drive transistor Md operates in the saturation region D1, thereby ensuring stable operation of the display panel 100.

[0117] Figure 7 A schematic diagram of a working curve of another driving transistor provided in an embodiment of the present application.

[0118] In one embodiment of the present application, Figure 7 As shown, the performance function y1 is one of the linear function k1, the quadratic function k2, and the cubic function k3.

[0119] Optionally, the performance function y1 is set to be an increasing or decreasing function, the same as the pre-pinch-off curve y2 of the driving transistor Md.

[0120] Optionally, the performance function y1 is set to a linear function k1, and the preset bipolar voltage drop and preset light-emitting driving current determined when the above-mentioned grayscale value is maximum and the dimming brightness value is maximum are substituted into the linear function to obtain the performance function y1. The performance function y1 is located on the side of the pre-pinch-off curve y2 close to the saturation region D1.

[0121] Optionally, the performance function y1 is a tangent line of the quadratic function k2 or the cubic function k3 at a point in the saturation region D1 .

[0122] Optionally, the performance function y1 is set to the quadratic function k2, and the preset bipolar voltage drop and preset light-emitting driving current determined when the above-mentioned grayscale value is maximum and the dimming brightness value is maximum are substituted into the quadratic function to obtain the performance function y1. The performance function y1 is located on the side of the pre-pinch-off y2 curve close to the saturation region D1.

[0123] Optionally, the performance function is set to a cubic function k3, and the preset bipolar voltage drop and preset light-emitting driving current determined when the above-mentioned grayscale value is maximum and the dimming brightness value is maximum are substituted into the cubic function to obtain the performance function y1. The performance function y1 is located on the side of the pre-pinch-off curve y2 close to the saturation region D1.

[0124] Figure 8 A flow chart of another method for determining a driving voltage provided in an embodiment of the present application.

[0125] In one embodiment of the present application, reference Figure 1 As shown, the display panel 100 includes a plurality of light emitting devices 300 of different colors;

[0126] According to the target bipolar voltage drop Vds', the first power supply voltage ELVSS corresponding to the maximum brightness parameter in the target brightness parameter range is determined, such as Figure 8 Shown, including:

[0127] S2': determining a target bipolar voltage drop Vds' having the largest absolute value among target bipolar voltage drops Vds' corresponding to the light-emitting driving currents for driving a plurality of light-emitting devices of different colors;

[0128] Light-emitting devices 300 of different colors are driven by different driving transistors Md, respectively. Optionally, the light-emitting devices 300 of different colors are red, green, and blue, respectively. While maintaining the white balance of the display panel 100, the light-emitting brightness of the light-emitting devices 300 of different colors is different, and the light-emitting driving currents Id received by the light-emitting devices 300 of different colors are different. Then, when the display panel 100 operates within the target brightness parameter range, the light-emitting brightness of the light-emitting devices 300 of different colors corresponding to the maximum brightness parameter in the target brightness parameter range is different, and the light-emitting driving currents Id corresponding to the light-emitting devices 300 of different colors are different. Substituting the light-emitting driving currents Id received by the light-emitting devices 300 of different colors into the performance function y1 will result in different target bipolar voltage drops Vds'.

[0129] To ensure that the driving transistors Md driving the light emitting devices 300 of different colors can all operate in the saturation region after adjusting the first power supply voltage ELVSS, the target bipolar voltage drop Vds' with the largest absolute value among the target bipolar voltage drops Vds' corresponding to the light emitting devices 300 of different colors is selected.

[0130] For example, in the target brightness parameter range, when the brightness parameter is maximum, the target bipolar voltage drop Vds' corresponding to the red light emitting device, the green light emitting device, and the blue light emitting device is determined as follows:

[0131] At the maximum brightness in each brightness parameter range, that is, the maximum grayscale value and the maximum dimming brightness value, the brightness of the red light-emitting device and the received light-emitting drive current are obtained, and the method for obtaining the relationship function between the brightness and the light-emitting drive current proposed in the above embodiment is used to determine whether the brightness and the light-emitting drive current of the red light-emitting device satisfy the first sub-function: Lv=C1*Id, where C1 is the slope of the first sub-function, and the brightness corresponding to the red light-emitting device at the maximum brightness parameter in the multiple brightness parameter ranges and the corresponding light-emitting drive current satisfy the first sub-function;

[0132] Similarly, it is determined that the brightness and light-emitting current of the green light-emitting device satisfy the second sub-function: Lv=C2*Id, where C2 is the slope of the first sub-function, and the brightness corresponding to the green light-emitting device at the maximum brightness parameter in the multiple brightness parameter ranges and the corresponding light-emitting driving current satisfy the first sub-function;

[0133] Similarly, it is determined that the brightness and light-emitting current of the blue light-emitting device satisfy the third sub-function: Lv=C3*Id, where C3 is the slope of the first sub-function, and the brightness corresponding to the green light-emitting device at the maximum brightness parameter in the multiple brightness parameter ranges and its corresponding light-emitting driving current satisfy the first sub-function;

[0134] Obtain the brightness of the red, green, and blue light-emitting devices corresponding to the maximum brightness parameter in the target brightness parameter range, and determine the light-emitting drive current values ​​received by the red, green, and blue light-emitting devices respectively according to the brightness of the red, green, and blue light-emitting devices and the corresponding first sub-function, second sub-function, and third sub-function.

[0135] Substituting the light-emitting driving current value received by the red light-emitting device into the performance function y1, the target bipolar voltage drop Vds' of the driving transistor Md driving the red light-emitting device is determined;

[0136] Substituting the light-emitting driving current value received by the green light-emitting device into the performance function y1, the target bipolar voltage drop Vds' of the driving transistor Md driving the green light-emitting device to emit light is determined;

[0137] Substituting the light-emitting driving current value received by the blue light-emitting device into the performance function y1, the target bipolar voltage drop Vds' of the driving transistor Md driving the blue light-emitting device to emit light is determined;

[0138] Determine a target bipolar voltage drop Vds' having the largest absolute value among the target bipolar voltage drops corresponding to the red, green, and blue light-emitting devices.

[0139] The first power supply voltage ELVSS corresponding to the maximum brightness parameter in the target brightness parameter range is determined according to the target bipolar voltage drop Vds′ having the largest absolute value.

[0140] Using the target bipolar voltage drop Vds′ with the largest absolute value to determine the first power supply voltage ELVSS is beneficial to ensuring that the driving transistors Md driving the light emitting devices 300 of each color to emit light all operate in the saturation region.

[0141] In one embodiment of the present application, the target bipolar voltage drop V with the largest absolute value is DS The first power supply voltage ELVSS corresponding to the maximum brightness parameter in the target brightness parameter range satisfies: ELVSS=ELVDD+Vd-VOLED;

[0142] ELVDD is the second power supply voltage, and VOLED is the voltage drop between the first electrode 3001 and the second electrode 3002 of the light-emitting device 300 .

[0143] Figure 9 A schematic diagram of a driver chip provided in an embodiment of the present application.

[0144] The embodiment of the present application provides a driver chip 400, such as Figure 9 As shown, it includes the first power supply voltage ELVSS obtained by the method provided in the above embodiment.

[0145] In the driver chip 400, the first power supply voltage ELVSS used by the display panel 100 when operating within the target brightness parameter range is determined based on the maximum brightness parameter in the target brightness parameter range. This is conducive to achieving a corresponding change in the first power supply voltage ELVSS for driving the display panel 100 when the brightness parameter changes, so that the changed first power supply voltage ELVSS can meet the power usage requirements and reduce power consumption; at the same time, it is conducive to ensuring that after the first power supply voltage ELVSS is changed, the driving transistor Md can still operate in the saturation region, stably generate the light-emitting driving current Id, and maintain the stable operation of the display panel 100.

[0146] Furthermore, by determining the first power supply voltage ELVSS based on the performance function of the drive transistor Md, the target bipolar voltage drop Vds' when the drive transistor Md operates in the saturation region D1 can be guaranteed within the target brightness parameter range. Furthermore, the first power supply voltage ELVSS corresponding to the maximum brightness parameter within the target brightness parameter range can be determined based on the potential relationship between the target bipolar voltage drop Vds' of the drive transistor Md and the first power supply voltage ELVSS. Furthermore, based on the performance function y1, the first power supply voltage ELVSS corresponding to multiple brightness parameter ranges can be obtained. This reduces the difficulty of obtaining the first power supply voltage ELVSS and avoids the need to conduct extensive data testing after the display panel 100 is manufactured before determining the first power supply voltage ELVSS. This improves the efficiency of obtaining the first power supply voltage ELVSS that can reduce power consumption, allows for flexible confirmation of the first power supply voltage ELVSS for various display panels 100, and enhances the feasibility of manufacturing a display panel 100 with dynamically adjustable first power supply voltage ELVSS.

[0147] Figure 10 A schematic diagram of another display panel provided in an embodiment of the present application.

[0148] The embodiment of the present application provides a display panel 100, such as Figure 10 As shown, the driving chip 400 provided in the above embodiment is used for driving.

[0149] In the display panel 100, the first power supply voltage ELVSS used by the display panel 100 when operating within the target brightness parameter range is determined based on the maximum brightness parameter in the target brightness parameter range. This is beneficial for achieving a corresponding change in the first power supply voltage ELVSS for driving the display panel 100 when the brightness parameter changes, so that the changed first power supply voltage ELVSS can meet the power usage requirements and reduce power consumption. At the same time, it is beneficial to ensure that after the first power supply voltage ELVSS is changed, the driving transistor Md can still operate in the saturation region, stably generate the light-emitting driving current Id, and maintain stable operation of the display panel 100.

[0150] Furthermore, by determining the first power supply voltage ELVSS based on the performance function of the drive transistor Md, the target bipolar voltage drop Vds' when the drive transistor Md operates in the saturation region D1 can be guaranteed within the target brightness parameter range. Furthermore, the first power supply voltage ELVSS corresponding to the maximum brightness parameter within the target brightness parameter range can be determined based on the potential relationship between the target bipolar voltage drop Vds' of the drive transistor Md and the first power supply voltage ELVSS. Furthermore, based on the performance function y1, the first power supply voltage ELVSS corresponding to multiple brightness parameter ranges can be obtained. This reduces the difficulty of obtaining the first power supply voltage ELVSS and avoids the need to conduct extensive data testing after the display panel 100 is manufactured before determining the first power supply voltage ELVSS. This improves the efficiency of obtaining the first power supply voltage ELVSS that can reduce power consumption, allows for flexible confirmation of the first power supply voltage ELVSS for various display panels 100, and enhances the feasibility of manufacturing a display panel 100 with dynamically adjustable first power supply voltage ELVSS.

[0151] Figure 11 A schematic diagram of a display device provided in an embodiment of the present application.

[0152] The embodiment of the present application provides a display device 500, such as Figure 11 As shown, it includes the display panel 100 provided in the above embodiment. The display device 500 provided in the embodiment of the present application can be an electronic device such as a computer, a television, a mobile phone, etc.

[0153] In the display device 500, a first power supply voltage ELVSS used by the display panel 100 when operating within the target brightness parameter range is determined based on the maximum brightness parameter in the target brightness parameter range. This is beneficial for achieving a corresponding change in the first power supply voltage ELVSS for driving the display panel 100 when the brightness parameter changes, so that the changed first power supply voltage ELVSS can meet the power usage requirements and reduce power consumption; at the same time, it is beneficial to ensure that after the first power supply voltage ELVSS is changed, the driving transistor Md can still operate in the saturation region, stably generate the light-emitting driving current Id, and maintain stable operation of the display panel 100.

[0154] Furthermore, by determining the first power supply voltage ELVSS based on the performance function of the drive transistor Md, the target bipolar voltage drop Vds' when the drive transistor Md operates in the saturation region D1 can be guaranteed within the target brightness parameter range. Furthermore, the first power supply voltage ELVSS corresponding to the maximum brightness parameter within the target brightness parameter range can be determined based on the potential relationship between the target bipolar voltage drop Vds' of the drive transistor Md and the first power supply voltage ELVSS. Furthermore, based on the performance function y1, the first power supply voltage ELVSS corresponding to multiple brightness parameter ranges can be obtained. This reduces the difficulty of obtaining the first power supply voltage ELVSS and avoids the need to conduct extensive data testing after the display panel 100 is manufactured before determining the first power supply voltage ELVSS. This improves the efficiency of obtaining the first power supply voltage ELVSS that can reduce power consumption, allows for flexible confirmation of the first power supply voltage ELVSS for various display panels 100, and enhances the feasibility of manufacturing a display panel 100 with dynamically adjustable first power supply voltage ELVSS.

[0155] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for determining a display panel driving voltage, characterized in that: The display panel includes a plurality of pixel circuits and a plurality of light-emitting devices, wherein the pixel circuits include a driving transistor, and the driving transistor is configured to generate a light-emitting driving current so that the pixel circuit drives the light-emitting device to emit light; when the driving transistor is configured to generate the light-emitting driving current, a first electrode of the driving transistor is electrically connected to a first electrode of the light-emitting device, and a second electrode of the driving transistor and a second electrode of the light-emitting device receive a first power supply voltage and the other receives a second power supply voltage; the method includes: Obtaining a target light-emitting driving current corresponding to a target brightness parameter range, where the target light-emitting driving current is a maximum of light-emitting driving currents corresponding to different brightness parameters in the target brightness parameter range; the target brightness parameter range is one of a plurality of brightness parameter ranges; determining a target bipolar voltage drop of the driving transistor based on the target light-emitting driving current; the target light-emitting driving current and the target bipolar voltage drop satisfy a performance function of the driving transistor; the bipolar voltage drop is a voltage drop between a source and a drain of the driving transistor, and the performance function is a function of the light-emitting driving current generated by the driving transistor with respect to the bipolar voltage drop of the driving transistor; determining the first power supply voltage corresponding to the target brightness parameter range according to the target bipolar voltage drop; wherein the performance function is determined according to a preset bipolar voltage drop and a preset light-emitting driving current corresponding to a maximum brightness parameter in the plurality of brightness parameter ranges; Determining a target bipolar voltage drop of the driving transistor according to the target light emitting driving current includes: The target light-emitting driving current is substituted into the performance function to obtain the target bipolar voltage drop of the driving transistor.

2. The method according to claim 1, characterized in that The target brightness corresponding to the maximum brightness parameter in the target brightness parameter range and its corresponding target light-emitting driving current satisfy a first function, and the brightness corresponding to the maximum brightness parameter in the multiple brightness parameter ranges and its corresponding preset light-emitting driving current satisfy the first function.

3. The method according to claim 1, characterized in that The multiple brightness parameter ranges are multiple grayscale ranges, or the multiple brightness parameter ranges are multiple dimming brightness value ranges.

4. The method according to any one of claims 1 to 3, characterized in that The obtaining of the target light-emitting driving current corresponding to the maximum brightness parameter in the target brightness parameter range includes: determining the first function according to the brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current; The target light-emitting driving current is determined according to the target brightness and the first function, where the target brightness is the brightness corresponding to the maximum brightness parameter in the target brightness parameter range.

5. The method according to claim 4, characterized in that The determining the first function according to the brightness corresponding to the maximum brightness parameter in the plurality of brightness parameter ranges and the corresponding preset light-emitting driving current includes: The first function is determined according to the maximum brightness corresponding to the maximum brightness parameter in the multiple brightness parameter ranges and the corresponding preset light-emitting driving current.

6. The method according to claim 1, characterized in that The performance function is one of a linear function, a quadratic function, and a cubic function.

7. The method according to claim 1, characterized in that The display panel includes a plurality of light emitting devices of different colors; The determining, based on the target bipolar voltage drop, the first power supply voltage corresponding to the maximum brightness parameter in the target brightness parameter range includes: Determining the target bipolar voltage drop with the largest absolute value among the target bipolar voltage drops respectively corresponding to the light-emitting driving currents for driving the plurality of light-emitting devices of different colors; The first power supply voltage corresponding to the maximum brightness parameter in the target brightness parameter range is determined according to the target bipolar voltage drop with the largest absolute value.

8. The method according to claim 7, characterized in that The absolute value of the maximum target voltage drop Vds and the target brightness parameter range of the maximum brightness parameter corresponding to the first power supply voltage ELVSS, satisfying: ELVSS = ELVDD + Vds-VOLED; Wherein, ELVDD is the second power supply voltage, and VOLED is the voltage drop between the first electrode and the second electrode of the light-emitting device.

9. A driver chip, characterized in that: The method comprises obtaining a first power supply voltage by using the method according to any one of claims 1 to 8.

10. A display panel, characterized in that: The driving chip according to claim 9 is used for driving.

11. A display device, characterized in that: The device comprises the display panel as claimed in claim 10.

Images