Display panel control method, control device and display device

Abstract

The embodiment of the present invention discloses a control method, a control device and a display device of a display panel. The control method of the display panel comprises: obtaining a display mode of the display panel, wherein the minimum display brightness of different display modes is the same and the maximum display brightness is different; according to the display mode, controlling the power chip of the display panel to output a first power supply voltage corresponding to the display mode to a driving chip, wherein at least some of the first power supply voltages corresponding to the display modes are different. The embodiment of the present invention can reduce the power consumption of the display panel.

Description

Technical Field

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

[0002] With the development of display technology, people have higher and higher requirements on display panels. However, existing display panels have the problem of high power consumption. Summary of the invention

[0003] The present invention provides a control method, a control device and a display device of a display panel, so as to reduce the power consumption of the display panel.

[0004] According to one aspect of the present invention, there is provided a method for controlling a display panel, comprising:

[0005] Obtaining a display mode of the display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness;

[0006] According to the display mode, the power chip of the display panel is controlled to output a first power voltage corresponding to the display mode to the driving chip, wherein at least some of the first power voltages corresponding to the display modes are different.

[0007] Optionally, the display mode includes a first display mode, and a maximum data driving voltage corresponding to the first display mode is greater than or equal to a set value;

[0008] The first power supply voltage corresponding to the first display mode is determined according to the maximum data driving voltage corresponding to the first display mode.

[0009] Optionally, the display mode includes a second display mode, and the maximum data driving voltage corresponding to the second display mode is less than a set value;

[0010] The first power supply voltage corresponding to the second display mode is determined according to the second power supply voltage and a high level voltage of a shift register circuit, wherein the second power supply voltage is a power supply voltage of a digital circuit in a driver chip.

[0011] Optionally, a difference between the first power supply voltage corresponding to each of the first display modes and the maximum data driving voltage corresponding to the first display mode is a set voltage value, wherein the set voltage value is greater than 0.

[0012] Optionally, the set voltage value is greater than or equal to 0.3V and less than or equal to 0.5V.

[0013] Optionally, the maximum data driving voltage of each of the first display modes is determined according to the data driving voltage of a set gray scale in the first display mode, wherein the set gray scale is greater than zero.

[0014] Optionally, controlling the power chip of the display panel to output a first power voltage corresponding to the display mode to the driving chip according to the display mode includes:

[0015] A register value of a first power supply voltage corresponding to the display mode is determined, and a corresponding control instruction is sent to the power supply chip according to the register value of the corresponding first power supply voltage, so that the power supply chip outputs the corresponding first power supply voltage to the driving chip.

[0016] According to another aspect of the present invention, there is provided a control device for a display panel, comprising:

[0017] A display mode acquisition module, used to acquire a display mode of a display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness;

[0018] The first power supply voltage determination module is used to control the power supply chip of the display panel to output the first power supply voltage corresponding to the display mode to the driving chip according to the display mode, wherein the first power supply voltages corresponding to at least some of the display modes are different.

[0019] Optionally, the display mode includes a first display mode, and a maximum data driving voltage corresponding to the first display mode is greater than or equal to a set value;

[0020] The first power supply voltage corresponding to the first display mode is determined according to the maximum data driving voltage corresponding to the first display mode;

[0021] The display mode further includes a second display mode, wherein the maximum data driving voltage corresponding to the second display mode is less than a set value;

[0022] The first power supply voltage corresponding to the second display mode is determined according to the second power supply voltage and the high level voltage of the shift register circuit, wherein the second power supply voltage is the power supply voltage of the digital circuit in the driver chip. According to another aspect of the present invention, a display device is provided, comprising a display panel, a power chip and a control device for the display panel according to any embodiment of the present invention.

[0023] The solution of the embodiment of the present invention is to set the first power supply voltages corresponding to at least some display modes to be different, and control the power supply chip of the display panel to output the first power supply voltage corresponding to the display mode to the driver chip according to the display mode. While meeting the display driving requirements of the driver chip, it avoids all display modes using the same larger first power supply voltage to cause excessive power consumption.

[0024] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a flow chart of a method for controlling a display panel provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a process for determining a first power supply voltage provided by an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of a control device for a display panel provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] As mentioned in the background technology, the existing display panel has the problem of high power consumption. The inventors have found through research that the reason for this problem is that the voltage AVDD for powering the driver chip in the existing display panel is high, resulting in high power consumption of the display panel.

[0033] Based on the above problems, an embodiment of the present invention provides a control method for a display panel. Figure 1 is a flow chart of a method for controlling a display panel provided by an embodiment of the present invention, with reference to Figure 1 , the method comprising:

[0034] S110. Obtain a display mode of the display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness.

[0035] Specifically, the minimum display brightness of different display modes is 0, and the maximum display brightness of different display modes can vary from a few nits to hundreds of nits. Exemplary maximum display brightness can include 2nit, 5nit, 10nit, 30nit, 100nit, 300nit, 500nit or 600nit, etc. The brightness range that can be displayed in each display mode can be divided into 2 n Grayscales, for example, can be divided into grayscales of 0-255, and the same grayscale in different display modes corresponds to different brightness.

[0036] The display mode of the display panel can be adjusted by changing the position of the brightness bar of the display panel. For example, in outdoor or high ambient brightness, the brightness bar can be adjusted to make the display panel display in a display mode with a larger maximum display brightness. In a dark ambient brightness, the brightness bar can be adjusted to make the display panel display in a display mode with a smaller maximum display brightness. When the user adjusts the position of the brightness bar or the display panel automatically adjusts the position of the brightness bar according to the ambient brightness, the position change of the brightness bar can be detected, and the display mode of the display panel is determined according to the position of the brightness bar.

[0037] S120, controlling the power chip of the display panel to output a first power voltage corresponding to the display mode to a driving chip according to the display mode, wherein the first power voltages corresponding to at least some of the display modes are different.

[0038] Specifically, the first power supply voltage is a voltage signal output by the power chip Power IC to the driver chip Driver IC for powering the driver chip. The display panel may include a plurality of sub-pixel units, each of which includes a light-emitting structure and a driving circuit. The driver chip is used to output a data driving voltage to the driving circuit, and the driving circuit drives the light-emitting structure to emit light according to the data driving voltage. The first power supply voltage is related to the data driving voltage, and the first power supply voltage needs to meet the size requirement of the data driving voltage output by the driver chip. Since different display modes display different brightness ranges, different display modes correspond to different ranges of data driving voltages, and therefore different display modes correspond to different first power supply voltages. In this embodiment, by setting the first power supply voltages corresponding to at least some display modes to be different, excessive power consumption is avoided due to all display modes using the same larger first power supply voltage.

[0039] The solution of the embodiment of the present invention is to set the first power supply voltages corresponding to at least some display modes to be different, and control the power supply chip of the display panel to output the first power supply voltage corresponding to the display mode to the driver chip according to the display mode. While meeting the display driving requirements of the driver chip, it avoids all display modes using the same larger first power supply voltage to cause excessive power consumption.

[0040] Optionally, the display mode includes a first display mode, and a maximum data driving voltage corresponding to the first display mode is greater than or equal to a set value;

[0041] The first power supply voltage corresponding to the first display mode is determined according to the maximum data driving voltage corresponding to the first display mode.

[0042] Specifically, the display panel may include multiple first display modes. The driver chip is used to output a data drive voltage to the driver circuit of the sub-pixel. The first power supply voltage for powering the driver chip cannot be lower than the data drive voltage. Therefore, each first display mode may be tested to determine the maximum data drive voltage corresponding to the first display mode, and the corresponding first power supply voltage may be determined based on the data drive voltage. Exemplarily, the maximum data drive voltage plus a set voltage value may be used as the first power supply voltage of the first display mode.

[0043] In addition, the driver chip is also used to provide voltage signals for other circuits of the display panel. Since the maximum data driving voltage of some display modes is relatively small, when the first power supply voltage determined by the maximum data driving voltage is relatively small, it cannot meet the power supply requirements of the driver chip to provide voltage signals for other circuits. The minimum first power supply voltage of the driver chip can be determined by the voltage output requirements of the driver chip for other circuits. For some display modes with relatively small maximum data driving voltages, the corresponding first power supply voltage directly adopts the minimum first power supply voltage. For display modes with relatively large maximum data driving voltages, the first power supply voltage is determined according to its maximum data driving voltage. The maximum data driving voltage corresponding to the first display mode is greater than or equal to the set value, that is, the first power supply voltage determined by the first display mode according to the maximum data driving voltage can meet the power supply requirements of the driver chip to provide voltage signals for other circuits. Therefore, in this embodiment, the first power supply voltage is determined according to the corresponding maximum data driving voltage for the first display mode, so as to ensure that the display panel has low power consumption while meeting the driving requirements of the driver chip for the display panel.

[0044] It should be noted that the set value can be determined according to the actual driving requirements of the display panel, and this embodiment does not make any specific limitation.

[0045] Optionally, the display mode includes a second display mode, and the maximum data driving voltage corresponding to the second display mode is less than a set value; the first power supply voltage corresponding to the second display mode is determined based on the second power supply voltage and the high level voltage of the shift register circuit, wherein the second power supply voltage is the power supply voltage of the digital circuit in the driver chip.

[0046] The display panel may include multiple second display modes. The second power supply voltage may be provided to the driver chip by the mainboard of the display panel. The shift register circuit may include a scan drive circuit and a light emitting drive circuit, the scan drive circuit is used to output a scan signal, and the light emitting drive circuit is used to output a light emitting control signal. The driver chip is also used to provide a high level voltage VGH for the scan drive circuit and the light emitting drive circuit. The driver chip obtains the high level voltage VGH of the shift register circuit by boosting the second power supply voltage and the first power supply voltage. Therefore, the sum of the first power supply voltage and the second power supply voltage cannot be lower than the high level voltage VGH of the shift register circuit. The second power supply voltage is generally a fixed value. Therefore, the minimum value of the first power supply voltage can be determined by the high level voltage VGH of the shift register circuit and the second power supply voltage. The maximum data drive voltage corresponding to the second display mode is less than the set value, and the first power supply voltage determined according to the maximum data drive voltage is less than the minimum value. The first power supply voltage of the second display mode can be determined as the minimum value.

[0047] Exemplarily, the high-level voltage of the shift register circuit is generally between 9V and 10V, and the second power supply voltage is 3.1V. In order to meet the high-level voltage requirement of the shift register circuit, the first power supply voltage needs to be greater than 6.9V. Exemplarily, the first power supply voltage can be set to be greater than or equal to 7V, that is, the minimum value of the first power supply voltage can be set to 7V.

[0048] In this embodiment, for the second display mode, the first power supply voltage is determined according to the second power supply voltage and the high level voltage of the shift register circuit, ensuring that the driving requirements of the driver chip for the shift register circuit are met while the driving requirements of the driver chip for other driving circuits are met.

[0049] Optionally, a difference between the first power supply voltage corresponding to each first display mode and the maximum data driving voltage corresponding to the first display mode is a set voltage value, and the set voltage value is greater than 0.

[0050] Specifically, the set voltage value can be determined according to the characteristics of the driver chip, as long as the driver chip meets the driving requirements of the sub-pixel when providing the first power supply voltage to the driver chip. In this embodiment, the first power supply voltage is obtained by adding the set voltage value to the maximum data driving voltage, thereby simplifying the calculation process of the first power supply voltage.

[0051] Optionally, the set voltage value is greater than or equal to 0.3V and less than or equal to 0.5V.

[0052] Specifically, when the voltage value is set too small, the first power supply voltage of the driver chip is too small and may not be able to meet the data driving voltage requirement. When the voltage value is set too large, the determined first power supply voltage is too large, which is not conducive to reducing power consumption. By setting the set voltage value to be greater than or equal to 0.3 and less than or equal to 0.5V, the power consumption is reduced while meeting the driving requirements of the driver chip.

[0053] Optionally, the maximum data driving voltage of each first display mode is determined according to the data driving voltage of a set gray scale in the first display mode, wherein the set gray scale is greater than zero.

[0054] Specifically, the driving circuit of the sub-pixel generally includes at least two transistors and at least one capacitor, and the at least two transistors generally include a driving transistor, which is used to provide a driving current to the light-emitting structure to make the light-emitting structure emit light. When the driving transistor in the existing driving circuit is a P-type transistor, the data driving voltage corresponding to 0 grayscale is the largest, and the data driving voltage corresponding to the maximum grayscale (such as 255 grayscale) is the smallest, that is, the maximum data driving voltage is the black state voltage. When determining the maximum data driving voltage, the data driving voltage corresponding to 1 grayscale can be tested by adding the data driving voltage corresponding to 1 grayscale to a preset voltage to obtain the data driving voltage corresponding to 0 grayscale, for example, the data driving voltage corresponding to 1 grayscale is added to 0.2V to obtain the data driving voltage corresponding to 0 grayscale. When the maximum data driving voltage is the black state voltage, in order to reduce the power consumption of the display panel, an upper limit value can also be set for the first power supply voltage, which is exemplarily set to 7.6V.

[0055] In addition, when the driving circuit changes, the maximum data driving voltage may also be the voltage corresponding to the 255 gray scales. In this case, the voltage corresponding to the 255 gray scales may be directly measured.

[0056] Optionally, controlling the power chip of the display panel to output a first power voltage corresponding to the display mode to the driving chip according to the display mode includes:

[0057] A register value of a first power supply voltage corresponding to the display mode is determined, and a corresponding control instruction is sent to the power supply chip according to the register value of the corresponding first power supply voltage, so that the power supply chip outputs the corresponding first power supply voltage to the driving chip.

[0058] Specifically, the driver chip has a register for storing the first power supply voltage value. After the driver chip determines the display mode, it reads the register value corresponding to the display mode and sends a control instruction to the voltage chip according to the register value. After receiving the control instruction, the power chip outputs the corresponding first power supply voltage.

[0059] Figure 2 is a schematic diagram of a process for determining a first power supply voltage provided by an embodiment of the present invention, with reference to Figure 2 , the process of determining the first power supply voltage AVDD may include:

[0060] S101. Use fixed AVDD for gamma debugging.

[0061] Specifically, the gamma adjustment of the display panel may be first performed using the AVDD commonly used in the prior art.

[0062] S102 , determining data driving voltages corresponding to the red sub-pixel, the green sub-pixel, and the blue sub-pixel when different display modes respectively display 1 gray scale.

[0063] Specifically, the data driving voltages corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel are determined when each display mode displays 1 gray scale.

[0064] S103 , determining a new AVDD value according to the data driving voltage of 1 gray scale.

[0065] Specifically, the maximum value of the data driving voltages corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel corresponding to grayscale 1 is selected as the data driving voltage corresponding to grayscale 1 in the display mode, 0.2 is added to the data driving voltage to obtain the maximum data driving voltage corresponding to the display mode, and 0.3 is added to the maximum data driving voltage to obtain a new AVDD value.

[0066] S104. Ensure that the AVDD voltage is within 7-7.6V. If not, force it back to 7-7.6V.

[0067] For example, if the AVDD of a certain display mode is less than 7V, the AVDD of the display mode can be determined as 7V; if the AVDD of a certain display mode is greater than 7.6V, the AVDD of the display mode can be determined as 7.6V.

[0068] S105 . Perform a gamma test using the newly determined AVDD to determine whether the newly determined AVDD meets the driving requirement.

[0069] If the gamma debugging meets the requirements, the newly determined AVDD meets the driving requirements.

[0070] S106 , writing the finally determined AVDD into the register of the display panel.

[0071] An embodiment of the present invention further provides a control device for a display panel. Figure 3 is a schematic diagram of a control device for a display panel provided by an embodiment of the present invention, with reference to Figure 3 , the control device comprises:

[0072] A display mode acquisition module 210, used to acquire a display mode of a display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness;

[0073] The first power supply voltage determination module 220 is used to control the power supply chip of the display panel to output the first power supply voltage corresponding to the display mode to the driving chip according to the display mode, wherein the first power supply voltages corresponding to at least some of the display modes are different.

[0074] Optionally, the display mode includes a first display mode, and a maximum data driving voltage corresponding to the first display mode is greater than or equal to a set value;

[0075] The first power supply voltage corresponding to the first display mode is determined according to the maximum data driving voltage corresponding to the first display mode.

[0076] Optionally, the display mode further includes a second display mode, and the maximum data driving voltage corresponding to the second display mode is less than a set value;

[0077] The first power supply voltage corresponding to the second display mode is determined according to the second power supply voltage and a high level voltage of a shift register circuit, wherein the second power supply voltage is a power supply voltage of a digital circuit in a driver chip.

[0078] Optionally, a difference between the first power supply voltage corresponding to each of the first display modes and the maximum data driving voltage corresponding to the first display mode is a set voltage value, wherein the set voltage value is greater than 0.

[0079] Optionally, the set voltage value is greater than or equal to 0.3V and less than or equal to 0.5V.

[0080] Optionally, the maximum data driving voltage of each of the first display modes is determined according to the data driving voltage of a set gray scale in the first display mode, wherein the set gray scale is greater than zero.

[0081] Optionally, controlling the power chip of the display panel to output a first power voltage corresponding to the display mode to the driving chip according to the display mode includes:

[0082] A register value of a first power supply voltage corresponding to the display mode is determined, and a corresponding control instruction is sent to the power supply chip according to the register value of the corresponding first power supply voltage, so that the power supply chip outputs the corresponding first power supply voltage to the driving chip.

[0083] Optionally, the first power supply voltage determining module 220 is specifically configured to:

[0084] A register value corresponding to the display mode is determined, and a corresponding control instruction is sent to the power chip according to the corresponding register value, so that the power chip outputs a corresponding first power voltage to the driving chip.

[0085] Figure 4 is a schematic diagram of a display device provided by an embodiment of the present invention. The embodiment of the present invention also provides a display device, referring to Figure 4 The display device 100 includes a display panel 200, a power chip 400, and a display panel control device 300 according to any embodiment of the present invention. The display device 100 may be an electronic device such as a mobile phone or a tablet computer.

[0086] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0087] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling a display panel, characterized in that: include: Obtaining a display mode of the display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness; Controlling the power chip of the display panel to output a first power voltage corresponding to the display mode to the driving chip according to the display mode, wherein the first power voltages corresponding to at least some of the display modes are different; The display mode includes a second display mode, and the maximum data driving voltage corresponding to the second display mode is less than a set value; The first power supply voltage corresponding to the second display mode is determined according to the second power supply voltage and a high level voltage of a shift register circuit, wherein the second power supply voltage is a power supply voltage of a digital circuit in a driver chip.

2. The method according to claim 1, characterized in that: The display mode includes a first display mode, and the maximum data driving voltage corresponding to the first display mode is greater than or equal to a set value; The first power supply voltage corresponding to the first display mode is determined according to the maximum data driving voltage corresponding to the first display mode.

3. The method according to claim 2, characterized in that: A difference between the first power supply voltage corresponding to each of the first display modes and the maximum data driving voltage corresponding to the first display mode is a set voltage value, wherein the set voltage value is greater than zero.

4. The method according to claim 3, characterized in that: The set voltage value is greater than or equal to 0.3V and less than or equal to 0.5V.

5. The method according to claim 2, characterized in that: The maximum data driving voltage of each of the first display modes is determined according to the data driving voltage of a set gray scale in the first display mode, wherein the set gray scale is greater than zero.

6. The method according to claim 1, characterized in that Controlling the power chip of the display panel to output a first power voltage corresponding to the display mode to the driving chip according to the display mode includes: A register value of a first power supply voltage corresponding to the display mode is determined, and a corresponding control instruction is sent to the power supply chip according to the corresponding register value of the first power supply voltage, so that the power supply chip outputs the corresponding first power supply voltage to the driving chip.

7. A control device for a display panel, characterized in that: include: A display mode acquisition module, used to acquire a display mode of a display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness; A first power supply voltage determination module, configured to control the power supply chip of the display panel to output a first power supply voltage corresponding to the display mode to the driving chip according to the display mode, wherein the first power supply voltages corresponding to at least some of the display modes are different; The display mode further includes a second display mode, wherein the maximum data driving voltage corresponding to the second display mode is less than a set value; The first power supply voltage corresponding to the second display mode is determined according to the second power supply voltage and a high level voltage of a shift register circuit, wherein the second power supply voltage is a power supply voltage of a digital circuit in a driver chip.

8. The device according to claim 7, characterized in that: The display mode includes a first display mode, and the maximum data driving voltage corresponding to the first display mode is greater than or equal to a set value; The first power supply voltage corresponding to the first display mode is determined according to the maximum data driving voltage corresponding to the first display mode.

9. A display device, characterized in that: The invention comprises a display panel, a power chip and a control device for the display panel according to any one of claims 7 to 8.

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