CN114399980B - Working voltage determining method and device and display device - Google Patents

Working voltage determining method and device and display device Download PDF

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CN114399980B
CN114399980B CN202111569561.XA CN202111569561A CN114399980B CN 114399980 B CN114399980 B CN 114399980B CN 202111569561 A CN202111569561 A CN 202111569561A CN 114399980 B CN114399980 B CN 114399980B
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target
target gray
gray scale
voltage
determining
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CN114399980A (en
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金羽锋
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The application provides a working voltage determining method, a device and a display device, relates to the technical field of display, and solves the problem of high power consumption existing in the prior art by adopting fixed power supply voltage and gamma voltage; determining the number of images with the image gray-scale values of the image data of the picture being the preset target gray-scale values, and obtaining the number of target gray-scale images; calculating the duty ratio of the number of the target gray-scale images in the total image number of the picture image data to obtain a target gray-scale duty ratio; and determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale duty ratio. According to different display pictures, the target power supply voltage and the target gamma voltage input to the display device are dynamically adjusted, and when the display device displays a low-gray-scale picture, the application of high-voltage current in the display device is reduced, so that the energy consumption of the display device is reduced.

Description

Working voltage determining method and device and display device
Technical Field
The application relates to the technical field of display, in particular to a working voltage determining method and device and a display device.
Background
A Timing Controller (TCON) Digital power management integrated circuit (Digital PM IC) is a circuit commonly used in liquid crystal display driving. The Digital power management integrated circuit (Digital PMIC) mainly comprises a Register, a Digital-to-analog converter (Digital to Analog Converter, DAC), a low dropout linear voltage regulator (low dropout regulator, GLDO) module and a gamma correction module. During application, data input by a data line SDA and a clock signal line SCL from an I2C bus are stored in a register, digital signals output by the register are converted into analog signals by a digital-to-analog converter, then the analog signals are input into a GLDO module and a gamma correction module, the GLDO module is a low-dropout linear voltage stabilizer for generating a gamma reference voltage Vref, the GLDO module generates the gamma reference voltage Vref according to the input analog signals and an analog voltage AVDD for gamma correction, then the GLDO module outputs a common gamma reference voltage Vref to the gamma correction module, and each circuit contained by the gamma correction module correspondingly outputs fourteen paths of gamma voltages Gam 1-Gam 14 respectively.
Because the current energy consumption requirement on the display is higher, wherein the AVDD voltage is one of the main energy consumption, on the traditional display, the AVDD output value is a fixed value and is generally larger than the Gamma 1 voltage, and for different pictures, the fixed AVDD voltage and Gamma voltage are adopted, so that the problem of higher energy consumption exists.
Disclosure of Invention
The application provides a working voltage determining method, a device and a display device, which can dynamically adjust an AVDD voltage and a Gamma voltage according to different pictures, keep the image quality unchanged and realize the reduction of the energy consumption output of the AVDD voltage.
In one aspect, the present application provides an operating voltage determining method, including:
acquiring picture image data of a next display picture of the display device;
determining the number of images with the image gray-scale values of the image data of the picture as preset target gray-scale values to obtain the number of target gray-scale images;
calculating the duty ratio of the target gray-scale image quantity in the total image quantity of the picture image data to obtain a target gray-scale duty ratio;
and determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale duty ratio.
In one possible implementation manner of the present application, the determining, according to the target gray scale duty ratio, a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage includes:
comparing the target gray scale duty ratio with a preset target gray scale threshold value to obtain a target gray scale comparison result;
and determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale comparison result.
In one possible implementation manner of the present application, the determining, according to the result of determining the target gray scale comparison, a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage, includes:
the target gray scale comparison result comprises that the target gray scale occupation ratio is larger than or equal to the target gray scale threshold value and the target gray scale occupation ratio is smaller than the target gray scale threshold value;
when the target gray scale comparison result is that the target gray scale duty ratio is larger than or equal to the target gray scale threshold value, determining that the target power supply voltage is a conventional power supply voltage, and determining that the target gamma voltage is a conventional gamma voltage corresponding to the conventional power supply voltage;
and when the target gray scale comparison result is that the target gray scale duty ratio is smaller than the target gray scale threshold value, determining that the target power supply voltage is a low-energy-consumption power supply voltage, and determining that the target gamma voltage is a low-energy-consumption gamma voltage corresponding to the low-energy-consumption power supply voltage.
In one possible implementation manner of the present application, before the acquiring the frame image data of the next display frame of the display device, the method includes:
determining a first-stage target gamma voltage, wherein the voltage value of the first-stage target gamma voltage is the same as the voltage value of a second-stage gamma voltage in the conventional gamma voltages;
determining a fourteenth-level target gamma voltage having a voltage value identical to a voltage value of a tenth-level gamma voltage among the conventional gamma voltages;
and respectively taking the first-stage target gamma voltage and the fourteenth-stage target gamma voltage as a first-stage low-energy-consumption gamma voltage and a fourteenth-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage.
In one possible implementation manner of the present application, before acquiring the frame image data of the next display frame of the display device, the method includes:
determining a target gray scale endpoint;
determining a target gray scale value range according to the target gray scale endpoint and the highest gray scale endpoint;
and taking all gray scale values in the target gray scale value range as the target gray scale values.
In one possible implementation manner of the present application, the determining the number of images with the image gray-scale value in the frame image data being the preset target gray-scale value, to obtain the number of target gray-scale images includes:
and determining the number of images of all gray scale values in the target gray scale value range in the picture image data to obtain the number of target gray scale images.
In one possible implementation manner of the present application, after the acquiring the frame image data of the next display frame of the display device, the method includes:
determining display data of a next display picture according to the picture image data;
and displaying according to the display data.
In another aspect, the present application provides an operating voltage determining device, the device including:
the acquisition module is used for acquiring picture image data of a next display picture of the display device;
the statistics module is used for determining the number of images with the image gray-scale values of the picture image data being preset target gray-scale values to obtain the number of target gray-scale images;
the calculating module is used for calculating the duty ratio of the target gray-scale image quantity in the total image quantity of the picture image data to obtain a target gray-scale duty ratio;
and the determining module is used for determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale duty ratio.
The apparatus further comprises:
and the storage module is used for storing the target power supply voltage and the target gamma voltage and carrying out data transmission with the determination module.
The determining module specifically comprises:
the target gray scale comparison result is obtained by comparing the target gray scale duty ratio with a preset target gray scale threshold;
and the target gamma voltage is used for inputting the target power supply voltage to the display device and the target gamma voltage corresponding to the target power supply voltage according to the determined target gray scale comparison result.
The target gray scale comparison result comprises that the target gray scale occupation ratio is larger than or equal to the target gray scale threshold value and the target gray scale occupation ratio is smaller than the target gray scale threshold value;
the determining module is also specifically:
when the target gray scale comparison result is that the target gray scale duty ratio is greater than or equal to the target gray scale threshold value, the method is used for determining that the target power supply voltage is a conventional power supply voltage and determining that the target gamma voltage is a conventional gamma voltage corresponding to the conventional power supply voltage;
and when the target gray scale comparison result is that the target gray scale duty ratio is smaller than the target gray scale threshold value, determining that the target power supply voltage is a low-energy-consumption power supply voltage, and determining that the target gamma voltage is a low-energy-consumption gamma voltage corresponding to the low-energy-consumption power supply voltage.
The device also comprises a gamma voltage pre-determining module, wherein the gamma voltage pre-determining module specifically comprises:
for determining a first-stage target gamma voltage having a voltage value identical to a voltage value of a second-stage gamma voltage among the conventional gamma voltages;
for determining a fourteenth-level target gamma voltage having a voltage value identical to a voltage value of a tenth-level gamma voltage among the conventional gamma voltages;
the first-stage low-energy-consumption gamma voltage and the fourteenth-stage low-energy-consumption gamma voltage are used for respectively taking the first-stage target gamma voltage and the fourteenth-stage target gamma voltage as the first-stage low-energy-consumption gamma voltage and the fourteenth-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage.
The device also comprises a target gray level determining module, wherein the target gray level determining module specifically comprises:
determining a target gray scale endpoint;
the method comprises the steps of determining a target gray scale value range according to the target gray scale endpoint and the highest gray scale endpoint;
for taking all gray-scale values in the target gray-scale value range as the target gray-scale values.
The statistical module specifically comprises:
and determining the number of images of all gray scale values in the target gray scale value range in the picture image data to obtain the target gray scale image number.
The device also comprises a display module, wherein the display module specifically comprises:
display data for determining a next display screen according to the screen image data;
for display according to the display data.
On the other hand, the application also provides a display device, wherein the display device adopts any one of the working voltage determining method or the working voltage determining device.
The display device is different for different display pictures, and the required power supply voltage and gamma voltage are different, so that after the picture image data of the next display picture of the display device is obtained, the application of high-voltage current in the display device can be reduced when the display device displays low-gray-scale pictures, and the energy consumption of the display device is further reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of one embodiment of a method for determining an operating voltage in an embodiment of the present application;
FIG. 2 is a schematic diagram of an embodiment of a display driving module according to the present application;
FIG. 3 is a flow chart of one embodiment of a method for operating voltage determination in an embodiment of the present application;
FIG. 4 is a flow chart of one embodiment of a method of operating voltage determination in an embodiment of the present application;
FIG. 5 is a schematic diagram of a correspondence relationship between two sets of voltages in a memory module according to an embodiment of the present application;
fig. 6 is a schematic structural view of one embodiment of the operation voltage determination device in the embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first", "a second" or the like may include one or more of the stated features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides a method and a device for determining working voltage and a display device, and the method and the device are described in detail below.
As shown in fig. 1, a flowchart of an embodiment of an operating voltage determining method according to an embodiment of the present application includes the following steps 101 to 104:
101. and acquiring picture image data of a next display picture of the display device.
In this embodiment, the display device may be, for example, a liquid crystal display (Liquid Crystal Display, LCD) or an organic light emitting diode display (Organic Light Emitting Diode, OLED), where the display device includes a display driving module, a display panel and an external memory, and in the application process, the external memory is used to input the image data of the next frame of display image to be displayed to the display driving module, and the display driving module analyzes according to the image data and outputs a corresponding display driving voltage to the display panel to drive the display panel to display.
In this embodiment, the display driving voltage includes a power voltage AVDD and fourteen paths of gamma voltages Gam1 to Gam14, and in this embodiment, the power voltage AVDD and the fourteen paths of gamma voltages Gam1 to Gam14 are dynamically adjusted according to different image data of a picture, so as to achieve the purpose of reducing energy consumption of the display.
102. And determining the number of images with the image gray-scale values of the image data of the picture being the preset target gray-scale values, and obtaining the number of target gray-scale images.
As shown in fig. 2, the display driving module includes a timing controller TCON, a digital power management integrated circuit PMIC, and a display driving IC, where the timing controller TCON detects and analyzes the picture image data after receiving the picture image data of the next frame of display picture input by the external memory, and analyzes the number of images with different gray scales in the picture image data to determine the number of gray scales in the picture image data at a preset target gray scale value, so as to obtain the number of target gray scale images. The preset target gray scale value may be set in the manual pre-display driving module, for example, when the preset target gray scale value is set to 233, the timing controller TCON analyzes that the number of gray scales of 233 in the image data of the picture is 30, and the number of obtained target gray scales is 30, and the preset target gray scale value may also be a target gray scale range formed by gray scales of a plurality of different gray scale values.
103. And calculating the duty ratio of the target gray-scale image quantity in the total image quantity of the picture image data to obtain a target gray-scale duty ratio.
After the target gray-scale image quantity is obtained, calculating the duty ratio of the target gray-scale image quantity in the total image quantity of the picture image data to obtain the target gray-scale duty ratio. For example, if the size of the frame image data is 100×100=10000 and the number of the obtained target gray levels is 30, the calculated target gray level ratio is 30/10000=0.3%.
104. And determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale duty ratio.
Specifically, the timing controller TCON determines the gray-scale duty ratio in the picture image data of the next frame of picture currently input according to the analyzed target gray-scale duty ratio, so as to analyze the gray-scale type of the picture image data of the current picture, where the gray-scale type of the picture image data includes low gray-scale picture image data or high gray-scale picture data.
Accordingly, determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale duty ratio includes:
determining the gray scale type of the picture image data input into the display device according to the target gray scale duty ratio;
according to the gray scale type, a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage are determined.
Specifically, when the input of the input end of the time sequence controller TCON is determined to be the low-gray-scale picture image data according to the target gray scale duty ratio, the time sequence controller TCON reads the low-power-consumption power supply voltage corresponding to the flash of the storage module and writes the low-power-consumption power supply voltage into the digital power management integrated circuit PMIC through the detection and analysis function, and the low-gray-scale picture image data, the low-power-consumption power supply voltage and the corresponding low-power-consumption gamma voltage group are transmitted to the display driving IC; otherwise, the same principle is adopted,
when the input of the input end of the time sequence controller TCON is determined to be high-gray-scale picture image data according to the target gray-scale duty ratio, the time sequence controller TCON reads the conventional power supply voltage corresponding to the flash of the memory module and writes the conventional power supply voltage into the PMIC, and the high-gray-scale picture image data, the conventional power supply voltage and the corresponding conventional gamma voltage group are transmitted to the display driving IC through the detection and analysis function.
The display device is different for different display pictures, and the required power supply voltage and gamma voltage are different, so that after the picture image data of the next display picture of the display device is obtained, the duty ratio of the picture image number at the target gray scale value in the total picture number is analyzed, the target power supply voltage and the target gamma voltage input into the display device are determined according to the target gray scale duty ratio, and the target power supply voltage and the target gamma voltage input into the display device are dynamically adjusted according to different display pictures, so that the application of high voltage current in the display device is reduced when the display device displays the low gray scale picture, the energy consumption of the display device is further reduced, and the display effect of the display picture is not affected when the energy consumption is reduced.
In another embodiment of the present application, the preset target gray-scale value set forth above may be a single target gray-scale value, or may be a target gray-scale range formed by a plurality of adjacent continuous target gray-scale values, and in an actual application process, in order to reduce a jump frequency of a power supply voltage input into the digital power management integrated circuit PMIC, the gray-scale duty ratio in the picture image data is generally determined by adopting the target gray-scale range formed by the plurality of target gray-scale values. In this embodiment, therefore, it is necessary to set the target gradation range as needed.
Specifically, as shown in fig. 3, before acquiring the screen image data of the next display screen of the display device, the method includes the following steps 201 to 203:
201. and determining a target gray scale endpoint.
The target gray level end point is any gray level point except the lowest gray level end point and the highest gray level end point in the full gray level, and the full gray level range is 0-255. Any one point in the full gray scale can be selected as a target gray scale endpoint according to actual needs. After selecting a plurality of target gray scale endpoints, dividing a low gray scale range, a medium gray scale range and a high gray scale range which meet the requirements by using a gray scale range formed by the plurality of target gray scale endpoints.
202. And determining a target gray scale value range according to the target gray scale end point and the highest gray scale end point.
Since the duty ratio of the middle and high gray levels of the picture image data needs to be determined, in this embodiment, the high gray level range is taken as the target gray level range, the target gray level endpoint is determined in the full gray level range according to the actual situation, the target gray level endpoint and the highest gray level endpoint of the full gray level range are taken as the two endpoints of the high gray level range, so as to form the target gray level range, all gray levels in the target gray level range are high gray levels, and the gray level endpoint with the gray level value of 233 is taken as the target gray level endpoint, so that the gray level range formed by the gray levels 233-255 is taken as the high gray level range, that is, the target gray level range.
203. And taking all gray scale values in the target gray scale value range as target gray scale values.
After the target gray scale value range is determined, taking all gray scale values in the target gray scale value range as target gray scale values. For example, if the target gray scale value range is set to be from 233 to 255, all of the gray scales 233 to 255 are target gray scale values.
In another embodiment of the present application, determining the number of images with the image gray-scale value being the preset target gray-scale value in the frame image data to obtain the number of target gray-scale images includes:
and determining the number of images of all gray scale values in the target gray scale value range in the picture image data to obtain the number of target gray scale images.
When the gray scale value of a certain gray scale of the picture image data is the same as the value of a certain target gray scale value of a target gray scale range, determining the gray scale as the target gray scale, and counting the number of images of all the gray scale values in the target gray scale range in the picture image data according to the method to obtain the number of target gray scale images. For example, if the target gray-scale value range is from 233 to 255, when 30 gray-scales with 233, 20 gray-scales with 244 and 20 gray-scales with 253 included in the screen image data are analyzed, the number of the obtained target gray-scale images is counted to be 70.
In another embodiment of the present application, as shown in fig. 4, determining a target power supply voltage input to a display device and a target gamma voltage corresponding to the target power supply voltage according to a target gray scale duty ratio, includes the following steps 301 to 302:
301. and comparing the target gray level duty ratio with a preset target gray level threshold value to obtain a target gray level comparison result.
The target gray scale comparison result comprises that the target gray scale duty ratio is larger than or equal to the target gray scale threshold value and the target gray scale duty ratio is smaller than the target gray scale threshold value;
the target gray level threshold is set manually according to experience, and is used for judging the size of a target gray level duty ratio, and is actually used for judging the proportion occupied by the number of target gray level images in the picture image data, namely, is used for judging which gray level of low gray level, medium gray level or high gray level the picture image data is in, so that whether the input target power supply voltage and the target gamma voltage need to be regulated or not is conveniently analyzed, in the embodiment, the numerical value of the target gray level threshold is not limited specifically, and the adaptive regulation can be carried out according to the requirement.
302. According to the target gray scale comparison result, determining a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage, specifically comprising:
when the target gray scale comparison result is that the target gray scale duty ratio is larger than or equal to the target gray scale threshold value, determining the target power supply voltage as the conventional power supply voltage, and determining the target gamma voltage as the conventional gamma voltage corresponding to the conventional power supply voltage;
specifically, when the target gray scale comparison result is that the target gray scale duty ratio is greater than or equal to the target gray scale threshold value, the input of the input end of the time sequence controller TCON is high gray scale picture image data, and the power supply voltage does not need to be reduced at this time, so that the target power supply voltage input to the display device is determined to be the conventional power supply voltage, and the target gamma voltage is determined to be the conventional gamma voltage corresponding to the conventional power supply voltage.
When the target gray scale comparison result is that the target gray scale duty ratio is smaller than the target gray scale threshold value, determining that the target power supply voltage is a low energy consumption power supply voltage, and determining that the target gamma voltage is a low energy consumption gamma voltage corresponding to the low energy consumption power supply voltage;
specifically, when the target gray level comparison result is that the target gray level duty ratio is smaller than the target gray level threshold, the input of the TCON input end of the timing controller is the low gray level image data, and the power supply voltage can be reduced to reduce the power consumption at this time, so that the target power supply voltage input to the display device is determined to be the low power consumption power supply voltage, and the target gamma voltage is determined to be the low power consumption gamma voltage corresponding to the low power consumption power supply voltage.
The following more specific examples illustrate the solutions proposed in the present application.
For example, the total image number of the screen image data is set to 100×100=10000, the high gray scale range formed by the gray scales 233 to 255 is set as the target gray scale value range, and the target gray scale threshold value is set to 0.2%;
when the number of images of the high gray level images in the picture image data of the input end of the time sequence controller TCON is 15, namely, the number of target gray level values in the target gray level value range is 15, the calculated target gray level occupation ratio is 0.15%, the target gray level occupation ratio is compared with the target gray level threshold value of 0.2%, the obtained target gray level comparison result is that the target gray level occupation ratio of 0.15% is smaller than the target gray level threshold value of 0.2%, the picture image data input by the input end of the time sequence controller TCON is the low gray level picture image data, and therefore the target power supply voltage input to the display device is determined to be the low power consumption power supply voltage, and the target gamma voltage is determined to be the low power consumption gamma voltage corresponding to the low power consumption power supply voltage;
similarly, in the frame image data of the timing controller TCON input end, the number of images of the high gray level images is 30, that is, the target gray level value in the target gray level value range is 30, the calculated target gray level occupation ratio is 0.3%, the target gray level occupation ratio is compared with the target gray level threshold value of 0.2%, the target gray level comparison result is that the target gray level occupation ratio is 0.3% and is greater than the target gray level threshold value of 0.2%, the frame image data input by the timing controller TCON input end is the high gray level frame image data, so that the target power voltage input to the display device is determined to be the normal power voltage, and the target gamma voltage is determined to be the normal gamma voltage corresponding to the normal power voltage.
In this embodiment, the conventional power supply voltage AVDD and the conventional gamma voltage GAM are universal driving voltages of the display device, the voltage of the conventional power supply voltage AVDD is reduced according to actual situation requirements, the obtained power supply voltage is the low-energy-consumption power supply voltage AVDD ', the voltage of the first-stage gamma voltage GAM1 in the conventional gamma voltage GAM is reduced, the reduced first-stage gamma voltage GAM1 is used as the first-stage gamma voltage GAM1' of the low-energy-consumption gamma voltage GAM ', and the second-stage gamma voltage GAM2 to the fourteenth-stage gamma voltage GAM14 in the conventional gamma voltage GAM are adaptively adjusted, so as to obtain the low-energy-consumption gamma voltage GAM'.
Thus, in another embodiment of the present application, before acquiring picture image data of a next display picture of a display device, a method includes:
determining a first-stage target gamma voltage, wherein the voltage value of the first-stage target gamma voltage is the same as that of a second-stage gamma voltage in the conventional gamma voltages;
determining a fourteenth-stage target gamma voltage, wherein the voltage value of the fourteenth-stage target gamma voltage is the same as the voltage value of a tenth-stage gamma voltage in the conventional gamma voltages;
the first-stage target gamma voltage and the fourteenth-stage target gamma voltage are respectively used as a first-stage low-energy-consumption gamma voltage and a fourteenth-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage.
The application adopts a storage module to store the conventional 2 groups of different power supply voltages and gamma voltages (conventional power supply voltage AVDD and conventional gamma voltage gam+low-energy consumption power supply voltage AVDD 'and low-energy consumption gamma voltage GAM'), wherein the corresponding relation between the conventional power supply voltage AVDD and conventional gamma voltage GAM and the low-energy consumption power supply voltage AVDD 'and the low-energy consumption gamma voltage GAM' is shown in fig. 5 in the storage module, and in the application process, the time sequence controller TCON reads the corresponding power supply voltage and gamma voltage from the storage module during the V-Blanking period of each frame of display picture and writes the corresponding power supply voltage and gamma voltage into the digital power management integrated circuit PMIC.
In another embodiment of the present application, after acquiring picture image data of a next display picture of a display device, a method includes:
display data of the next display screen is determined according to the screen image data, and display is performed according to the display data.
In order to better implement the method for determining the operating voltage in the embodiment of the present application, on the basis of the method for determining the operating voltage, an apparatus for determining the operating voltage is further provided in the embodiment of the present application, as shown in fig. 6, where the apparatus 400 for determining the operating voltage includes:
an acquisition module 401, configured to acquire picture image data of a next display picture of the display device;
the statistics module 402 is configured to determine the number of images in the frame image data, where the number of images in the frame image data has a preset target gray level value, to obtain the number of target gray level images;
a calculating module 403, configured to calculate a duty ratio of the number of target gray-scale images in the total number of images of the frame image data, to obtain a target gray-scale duty ratio;
a determining module 404, configured to determine a target power supply voltage input to the display device and a target gamma voltage corresponding to the target power supply voltage according to the target gray scale duty ratio.
The apparatus further comprises:
the storage module is used for storing the target power supply voltage and the target gamma voltage and performing data transmission with the determining module 404.
The determining module 404 specifically includes:
the method comprises the steps of comparing a target gray scale duty ratio with a preset target gray scale threshold value to obtain a target gray scale comparison result;
and the target gamma voltage is used for inputting the target power voltage to the display device and the target gamma voltage corresponding to the target power voltage according to the determined target gray scale comparison result.
The target gray scale comparison result comprises that the target gray scale duty ratio is larger than or equal to the target gray scale threshold value and the target gray scale duty ratio is smaller than the target gray scale threshold value;
the determining module 404 is also specifically:
when the target gray scale comparison result is that the target gray scale duty ratio is larger than or equal to the target gray scale threshold value, the method is used for determining that the target power supply voltage is the conventional power supply voltage and determining that the target gamma voltage is the conventional gamma voltage corresponding to the conventional power supply voltage;
when the target gray scale comparison result is that the target gray scale duty ratio is smaller than the target gray scale threshold value, the method is used for determining that the target power supply voltage is the low-energy consumption power supply voltage and determining that the target gamma voltage is the low-energy consumption gamma voltage corresponding to the low-energy consumption power supply voltage.
The device further comprises a gamma voltage pre-determination module 404, wherein the gamma voltage pre-determination module 404 is specifically:
the method comprises the steps of determining a first-stage target gamma voltage, wherein the voltage value of the first-stage target gamma voltage is the same as that of a second-stage gamma voltage in the conventional gamma voltages;
the method comprises the steps of determining a fourteenth-level target gamma voltage, wherein the voltage value of the fourteenth-level target gamma voltage is the same as the voltage value of a tenth-level gamma voltage in the conventional gamma voltages;
the first-stage low-energy-consumption gamma voltage and the fourteenth-stage low-energy-consumption gamma voltage are used for respectively taking the first-stage target gamma voltage and the fourteenth-stage target gamma voltage as low-energy-consumption gamma voltages.
The device further includes a target gray-scale determining module 404, where the target gray-scale determining module 404 specifically includes:
determining a target gray scale endpoint;
the method comprises the steps of determining a target gray scale value range according to a target gray scale endpoint and a highest gray scale endpoint;
for taking all the gray-scale values in the target gray-scale value range as target gray-scale values.
The statistics module 402 specifically includes:
and the method is used for determining the number of images of all gray scale values in the target gray scale value range in the picture image data to obtain the number of target gray scale images.
The acquisition module 401 specifically includes:
the display device is used for acquiring display data currently input by the display device;
and the screen image data is used for determining the next display screen according to the display data.
On the other hand, the application also provides a display device, the display device comprises a display driving module shown in fig. 2, and the display driving module comprises a time sequence controller TCON, a digital power management integrated circuit PMI C and a display driving IC, wherein the display device adopts the working voltage determining method or the working voltage determining device.
The above description has been made in detail on a method, an apparatus and a display device for determining an operating voltage provided in the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present invention, where the above description of the embodiments is only for helping to understand the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.

Claims (7)

1. A method of operating voltage determination, comprising:
acquiring picture image data of a next display picture of the display device;
determining the number of images with the image gray-scale values of the image data of the picture as preset target gray-scale values to obtain the number of target gray-scale images;
calculating the duty ratio of the target gray-scale image quantity in the total image quantity of the picture image data to obtain a target gray-scale duty ratio;
comparing the target gray scale duty ratio with a preset target gray scale threshold value to obtain a target gray scale comparison result, wherein the target gray scale comparison result comprises that the target gray scale duty ratio is larger than or equal to the target gray scale threshold value and the target gray scale duty ratio is smaller than the target gray scale threshold value;
when the target gray scale comparison result is that the target gray scale duty ratio is greater than or equal to the target gray scale threshold value, determining that the target power supply voltage input to the display device is a conventional power supply voltage, and determining that the target gamma voltage is a conventional gamma voltage corresponding to the conventional power supply voltage;
when the target gray scale comparison result is that the target gray scale duty ratio is smaller than the target gray scale threshold value, determining that the target power supply voltage input to the display device is a low-energy-consumption power supply voltage, and determining that the target gamma voltage is a low-energy-consumption gamma voltage corresponding to the low-energy-consumption power supply voltage;
the voltage value of the first-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage is the same as the voltage value of the second-stage gamma voltage of the conventional gamma voltages, the voltage value of the fourteenth-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage is the same as the voltage value of the tenth-stage gamma voltage of the conventional gamma voltages, and the conventional power supply voltage, the conventional gamma voltage, the low-energy-consumption power supply voltage and the low-energy-consumption gamma voltage are all stored in a storage module of the display device.
2. The operating voltage determining method according to claim 1, wherein before acquiring picture image data of a next display picture of the display device, the method includes:
determining a target gray scale endpoint;
determining a target gray scale value range according to the target gray scale endpoint and the highest gray scale endpoint;
and taking all gray scale values in the target gray scale value range as the target gray scale values.
3. The method for determining an operating voltage according to claim 2, wherein determining the number of images in which the image gray-scale value in the picture image data is a preset target gray-scale value to obtain the number of target gray-scale images includes:
and determining the number of images of all gray scale values in the target gray scale value range in the picture image data to obtain the number of target gray scale images.
4. The operating voltage determining method according to claim 1, wherein after the acquisition of the picture image data of the next display picture of the display device, the method includes:
determining display data of a next display picture according to the picture image data;
and displaying according to the display data.
5. An operating voltage determining device, the device comprising:
the acquisition module is used for acquiring picture image data of a next display picture of the display device;
the statistics module is used for determining the number of images with the image gray-scale values of the picture image data being preset target gray-scale values to obtain the number of target gray-scale images;
the calculating module is used for calculating the duty ratio of the target gray-scale image quantity in the total image quantity of the picture image data to obtain a target gray-scale duty ratio;
the determining module is used for comparing the target gray scale occupation ratio with a preset target gray scale threshold value to obtain a target gray scale comparison result, wherein the target gray scale comparison result comprises that the target gray scale occupation ratio is larger than or equal to the target gray scale threshold value and the target gray scale occupation ratio is smaller than the target gray scale threshold value;
when the target gray scale comparison result is that the target gray scale duty ratio is greater than or equal to the target gray scale threshold value, determining that the target power supply voltage input to the display device is a conventional power supply voltage, and determining that the target gamma voltage is a conventional gamma voltage corresponding to the conventional power supply voltage;
when the target gray scale comparison result is that the target gray scale duty ratio is smaller than the target gray scale threshold value, determining that the target power supply voltage input to the display device is a low-energy-consumption power supply voltage, and determining that the target gamma voltage is a low-energy-consumption gamma voltage corresponding to the low-energy-consumption power supply voltage;
the voltage value of the first-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage is the same as the voltage value of the second-stage gamma voltage of the conventional gamma voltages, and the voltage value of the fourteenth-stage low-energy-consumption gamma voltage of the low-energy-consumption gamma voltage is the same as the voltage value of the tenth-stage gamma voltage of the conventional gamma voltages.
6. The operating voltage determining device of claim 5, wherein the device further comprises:
and the storage module is used for storing the target power supply voltage and the target gamma voltage and carrying out data transmission with the determination module.
7. A display device employing the operating voltage determining method according to any one of claims 1 to 4 or the operating voltage determining apparatus according to claims 5 to 6.
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