CN115132115A - Control method and control device of display panel and display device - Google Patents

Abstract

Embodiments of the present invention disclose a control method, a control device and a display device for a display panel. The control method of the display panel includes: acquiring 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, the power supply chip of the display panel is controlled to output the corresponding display mode to the driver chip. The first power supply voltage, wherein at least some of the first power supply voltages corresponding to the display modes are different. The embodiments of the present invention can reduce the power consumption of the display panel.

Description

Display panel control method, control device, and display device

technical field

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

Background technique

With the development of display technology, people have higher and higher requirements on display panels, however, the existing display panels have the problem of high power consumption.

SUMMARY OF THE INVENTION

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

According to an aspect of the present invention, a method for controlling a display panel is provided, including:

Obtain the 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;

The power supply chip that controls the display panel according to the display mode outputs the first power supply voltage corresponding to the display mode to the driver chip, wherein at least some of the first power supply voltages corresponding to the display modes are different.

Optionally, 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.

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 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 driving chip.

Optionally, the 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.

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

Optionally, the maximum data driving voltage of each of the first display modes is determined according to the data driving voltage of the set gray scale in the first display mode, wherein the set gray scale is greater than 0.

Optionally, controlling 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, including:

Determine the register value of the first power supply voltage corresponding to the display mode, and send a corresponding control command 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 control command to the driving chip. the first supply voltage.

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

The display mode acquisition module is used to acquire the 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;

a first power supply voltage determination module, configured to 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, wherein at least some of the first power supply voltages corresponding to the display modes are different .

Optionally, 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;

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;

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 driving chip. According to another aspect of the present invention, a display device is provided, including a display panel, a power chip, and the control device for the display panel according to any embodiment of the present invention.

The solution of the embodiment of the present invention is to set the first power supply voltage 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 driving chip according to the display mode, so as to satisfy the display mode of the driving chip. While driving the demand, it is avoided that all display modes use the same larger first power supply voltage to cause excessive power consumption.

It should be understood that the content described in this section is not intended to identify key or critical features of the embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become readily understood from the following description.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a flowchart of a control method of a display panel provided by an embodiment of the present invention;

2 is a schematic diagram of a process for determining a first power supply voltage according to an embodiment of the present invention;

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

FIG. 4 is a schematic diagram of a display device according to an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

As mentioned in the background art, the existing display panel has the problem of high power consumption. The inventor 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 relatively high, This results in high power consumption of the display panel.

Based on the above problems, an embodiment of the present invention provides a method for controlling a display panel. FIG. 1 is a flowchart of a method for controlling a display panel provided by an embodiment of the present invention. Referring to FIG. 1 , the method includes:

S110. Acquire a display mode of the display panel, wherein different display modes have the same minimum display brightness and different maximum display brightness.

Specifically, the minimum display brightness of different display modes is 0, the maximum display brightness of different display modes can vary from a few nits to several hundred nits, and 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 0-255 grayscales, and the same grayscale in different display modes corresponds to different brightness.

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 an outdoor or a place with high ambient brightness, the brightness bar can be adjusted so that the display panel is displayed in a display mode with a higher maximum display brightness. In dark places, the brightness bar can be adjusted to make the display panel display in a display mode with a lower 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 can be determined according to the position of the brightness bar.

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

Specifically, the first power supply voltage is a voltage signal output by the power supply chip Power IC to the driving chip Driver IC for supplying power to the driving chip. The display panel may include a plurality of sub-pixel units, each sub-pixel unit includes a light-emitting structure and a driving circuit, the driving chip is used for outputting 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 size of the data driving voltage. The first power supply voltage needs to meet the size requirements of the output data driving voltage of the driving chip. Since the brightness ranges displayed by different display modes are different, the ranges of the data driving voltages corresponding to different display modes are different. , so the first power supply voltages corresponding to different display modes may also be different. In this embodiment, the first power supply voltages corresponding to at least some of the display modes are set to be different, so as to avoid excessive power consumption caused by using the same larger first power supply voltage for all display modes.

The solution of the embodiment of the present invention is to set the first power supply voltage 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 driving chip according to the display mode, so as to satisfy the display mode of the driving chip. While driving the demand, it is avoided that all display modes use the same larger first power supply voltage to cause excessive power consumption.

Optionally, 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.

Specifically, the display panel may include a plurality of first display modes. The driving chip is used to output the data driving voltage to the driving circuit of the sub-pixel. The first power supply voltage for the driving chip cannot be lower than the data driving voltage. Therefore, each first display mode can be tested to determine the corresponding first display mode. For the maximum data driving voltage, the corresponding first power supply voltage is determined according to the data driving voltage. Exemplarily, a set voltage value can be added to the maximum data driving voltage as the first power supply voltage of the first display mode.

In addition, the driving 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 small, when the first power supply voltage determined by the maximum data driving voltage is small, the driving chip cannot meet the requirements of When other circuits provide the power supply requirements of voltage signals, the minimum first power supply voltage of the driving chip can be determined by the voltage output requirements of the driving chip to other circuits. For some display modes with a small maximum data driving voltage, the corresponding first power supply The voltage directly adopts the minimum first power supply voltage. For a display mode with a larger maximum data driving voltage, 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 according to the maximum data driving voltage in the first display mode can meet the power supply requirements of the driving chip for providing voltage signals to 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 to ensure that the driving requirements of the driving chip for the display panel are met, and the display panel has low power consumption.

It should be noted that the setting value may be determined according to the actual driving requirement of the display panel, which is not specifically limited in this embodiment.

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

Wherein, the display panel may include a plurality of second display modes. The second power supply voltage may be provided by the mainboard of the display panel to the driver chip. The shift register circuit may include a scan driving circuit for outputting a scan signal and a light-emitting driving circuit for outputting a light-emitting control signal. The driver chip is also used to provide the high-level voltage VGH for the scan driver circuit and the light-emitting driver 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 first The sum of the 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 constant value, so the high-level voltage VGH and the second power supply voltage of the shift register circuit can pass through. A minimum value of the first supply voltage is determined. The maximum data driving voltage corresponding to the second display mode is less than the set value, the first power supply voltage determined according to the maximum data driving voltage is less than the minimum value, and the first power supply voltage of the second display mode can be determined as the minimum value.

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. V, 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.

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, so as to ensure that the driving requirements of the driving chip for the shift register circuit are met, and the driving chip to other drivers is also satisfied. circuit drive requirements.

Optionally, the 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.

Specifically, the set voltage value may be determined according to the characteristics of the driver chip, as long as the driver chip satisfies the driving requirements of the sub-pixels when the first power supply voltage is provided for the driver chip. In this embodiment, the first power supply voltage is obtained by adding the maximum data driving voltage to the set voltage value, which simplifies the calculation process of the first power supply voltage.

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

Specifically, if the set voltage value is too small, the first power supply voltage of the driver chip is too small, which may not meet the data driving voltage requirements. When the set voltage value is 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.

Optionally, the maximum data driving voltage of each first display mode is determined according to the data driving voltage of the set gray level in the first display mode, wherein the set gray level is greater than 0.

Specifically, the drive circuit of the sub-pixel generally includes at least two transistors and at least one capacitor. The at least two transistors generally include a drive transistor, and the drive transistor is used to provide a drive current to the light-emitting structure to make the light-emitting structure emit light. In the existing driving circuit, when the driving transistor 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 (eg, 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, and the data driving voltage corresponding to 1 grayscale is added with a preset voltage to obtain the data driving voltage corresponding to 0 grayscale. The data driving voltage corresponding to 1 gray scale is added with 0.2V to obtain the data driving voltage corresponding to 0 gray scale. 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.

In addition, when the driving circuit changes, the maximum data driving voltage may also be the voltage corresponding to the 255 gray scale, and at this time, the voltage corresponding to the 255 gray scale can be directly measured.

Optionally, controlling 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, including:

Determine the register value of the first power supply voltage corresponding to the display mode, and send a corresponding control command 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 control command to the driving chip. the first supply voltage.

Specifically, the driver chip has a register for storing the value of the first power supply voltage. After the driver chip determines the display mode, it reads the register value corresponding to the display mode, and sends a control command to the voltage chip according to the register value, and the power supply chip receives it. After the control command, the corresponding first power supply voltage is output.

2 is a schematic diagram of a process for determining a first power supply voltage according to an embodiment of the present invention. Referring to FIG. 2 , the process for determining the first power supply voltage AVDD may include:

S101, using a fixed AVDD for gamma debugging.

Specifically, the gamma debugging of the display panel may first be performed by using AVDD commonly used in the prior art.

S102. Determine the data driving voltages corresponding to the red sub-pixels, the green sub-pixels, and the blue sub-pixels when different display modes display one gray scale respectively.

Specifically, the data driving voltages corresponding to the red sub-pixels, the green sub-pixels, and the blue sub-pixels are determined when each display mode displays one gray scale.

S103: Determine a new AVDD value according to the data driving voltage of 1 gray scale.

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

S104. Make sure that the AVDD voltage is within 7-7.6V, if not, force it back to 7-7.6V.

For example, if the AVDD of a certain display mode is less than 7V, the AVDD of the display mode can be determined to be 7V, and the AVDD of a certain display mode is greater than 7.6V, the AVDD of the display mode can be determined to be 7.6V.

S105. Use the newly determined AVDD to perform a gamma test to determine whether the newly determined AVDD meets the driving requirement.

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

S106, write the finally determined AVDD into the register of the display panel.

An embodiment of the present invention further provides a control device for a display panel. FIG. 3 is a schematic diagram of a control device for a display panel provided by an embodiment of the present invention. Referring to FIG. 3 , the control device includes:

a display mode obtaining module 210, configured to obtain 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;

The first power supply voltage determination module 220 is configured to 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, wherein at least part of the first power supply voltage corresponding to the display mode different.

Optionally, 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.

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;

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 driving chip.

Optionally, the 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.

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

Optionally, the maximum data driving voltage of each of the first display modes is determined according to the data driving voltage of the set gray scale in the first display mode, wherein the set gray scale is greater than 0.

Optionally, controlling 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, including:

Determine the register value of the first power supply voltage corresponding to the display mode, and send a corresponding control command 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 control command to the driving chip. the first supply voltage.

Optionally, the first power supply voltage determination module 220 is specifically configured to:

A register value 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, so that the power supply chip outputs a corresponding first power supply voltage to the driving chip.

FIG. 4 is a schematic diagram of a display device provided by an embodiment of the present invention. An embodiment of the present invention also provides a display device. Referring to FIG. 4 , the display device 100 includes a display panel 200 , a power chip 400 and any of the embodiments of the present invention. The control device 300 of the display panel described above. The display device 100 may be an electronic device such as a mobile phone or a tablet computer.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, and as long as the desired results of the technical solutions of the present invention can be achieved, no limitation is imposed herein.

The above-mentioned specific embodiments 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 may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A control method for a display panel, comprising: Obtain the 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; The power supply chip that controls the display panel according to the display mode outputs the first power supply voltage corresponding to the display mode to the driver chip, wherein at least some of the first power supply voltages corresponding to the display modes are different. 2. method according to claim 1, is 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. method according to claim 1, is characterized in that: 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 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 driving chip. 4. method according to claim 2, is characterized in that: The 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. 5. method according to claim 4, is characterized in that: The set voltage value is greater than or equal to 0.3V and less than or equal to 0.5V. 6. The method according to claim 2, wherein: The maximum data driving voltage of each of the first display modes is determined according to the data driving voltage of the set gray level in the first display mode, wherein the set gray level is greater than 0. 7 . The method according to claim 1 , wherein controlling 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, comprising: 8 . Determine the register value of the first power supply voltage corresponding to the display mode, and send a corresponding control command 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 control command to the driving chip. the first supply voltage. 8. A control device for a display panel, comprising: The display mode acquisition module is used to acquire the 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; a first power supply voltage determination module, configured to 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, wherein at least some of the first power supply voltages corresponding to the display modes are different . 9. The device according to claim 8, wherein: 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; 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; 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 driving chip. 10. A display device, comprising a display panel, a power supply chip and the control device for the display panel according to any one of claims 8-9.

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