CN114399980A - Working voltage determination method and device and display device - Google Patents
Working voltage determination method and device and display device Download PDFInfo
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- CN114399980A CN114399980A CN202111569561.XA CN202111569561A CN114399980A CN 114399980 A CN114399980 A CN 114399980A CN 202111569561 A CN202111569561 A CN 202111569561A CN 114399980 A CN114399980 A CN 114399980A
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- 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
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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
- G09G3/2007—Display of intermediate tones
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- 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
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Abstract
The application provides a working voltage determination method, a working voltage determination device and a display device, relates to the technical field of display, and solves the problem that power consumption is high when a fixed power supply voltage and a gamma voltage are adopted at present; determining the number of images with image gray scale values as preset target gray scale values in the image data of the picture to obtain the number of target gray scale images; calculating the ratio of the number of the target gray scale images to the total number of the images of the picture image data to obtain a target gray scale ratio value; 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 ratio. According to the method and the device, the target power supply voltage and the target gamma voltage input to the display device are dynamically adjusted according to different display pictures, 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
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 commonly used circuit in a liquid crystal display driver. The Digital power management integrated circuit (Digital PMIC) mainly includes a Register (Register), a Digital-to-Analog Converter (DAC), a low dropout regulator (GLDO) module, and a gamma correction module. In the application process, data input from a data line SDA and a clock signal line SCL of an I2C bus are stored in a register, a digital signal output by the register is converted into an analog signal by a digital-to-analog converter, then the analog signal is input into a GLDO module and a gamma correction module, the GLDO module is a low-dropout linear regulator for generating a gamma reference voltage Vref, the GLDO module generates the gamma reference voltage Vref according to the input analog signal 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 circuits contained in the gamma correction module respectively correspondingly output fourteen gamma voltages Gam 1-Gam 14.
Because the energy consumption requirement of the display is high at present, wherein the AVDD voltage is one of the main energy consumption, on the traditional display, the AVDD output value is a fixed value, generally larger than the Gam1 voltage, and for different pictures, the problem of high energy consumption exists by adopting the fixed AVDD voltage and the Gamma voltage.
Disclosure of Invention
The application provides a working voltage determining method, a device and a display device, wherein the AVDD voltage and the Gamma voltage can be dynamically adjusted according to different pictures, meanwhile, the picture quality is kept unchanged, and the energy consumption output of the AVDD voltage is reduced.
In one aspect, the present application provides a method for determining an operating voltage, comprising:
acquiring picture image data of a next display picture of the display device;
determining the number of images with image gray scale values as preset target gray scale values in the picture image data to obtain the number of target gray scale images;
calculating the ratio of the number of the target gray scale images to the total number of the images of the picture image data to obtain a target gray scale ratio value;
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 ratio.
In one possible implementation manner of the present application, the determining a target power voltage input to the display device and a target gamma voltage corresponding to the target power voltage according to the target gray scale ratio includes:
comparing the target gray scale 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 inputting a target power voltage to the display device and a target gamma voltage corresponding to the target power voltage according to the determined target gray scale comparison result includes:
the target gray scale comparison result comprises that the target gray scale ratio value is greater than or equal to the target gray scale threshold value and the target gray scale ratio value is smaller than the target gray scale threshold value;
when the target gray scale comparison result is that the target gray scale ratio is greater than or equal to the target gray scale threshold, 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 shows that the target gray scale occupation ratio is smaller than the target gray scale threshold, 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 obtaining of the picture image data of the next display picture 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 that of a second-stage gamma voltage in the conventional gamma voltage;
determining a fourteenth-stage target gamma voltage having the same voltage value as that of a thirteenth-stage gamma voltage among the normal gamma voltages;
and 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 respectively.
In one possible implementation manner of the present application, before acquiring picture image data of a next display picture of a display device, the method includes:
determining a target gray scale endpoint;
determining a target gray scale value range according to the target gray scale end point and the highest gray scale end point;
and taking all gray-scale values in the target gray-scale value range as the target gray-scale values.
In a possible implementation manner of the present application, the determining the number of images in which the image gray-scale value in the image data is a preset target gray-scale value to obtain the number of target gray-scale images includes:
and determining the image quantity of all gray-scale values in the range of the target gray-scale value in the picture image data to obtain the target gray-scale image quantity.
In one possible implementation manner of the present application, after acquiring picture image data of a next display picture of a 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 apparatus, the apparatus comprising:
the acquisition module is used for acquiring the picture image data of the next display picture of the display device;
the statistical module is used for determining the number of images with image gray scale values being preset target gray scale values in the picture image data to obtain the number of target gray scale images;
the calculation module is used for calculating the ratio of the number of the target gray-scale images to the total number of the images of the picture image data to obtain a target gray-scale ratio value;
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 ratio.
The device further comprises:
and the storage module is used for storing the target power supply voltage and the target gamma voltage and is used for carrying out data transmission with the determination module.
The determining module is specifically:
the target gray scale ratio is compared 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 a target power supply voltage to the display device and a 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 ratio value is greater than or equal to the target gray scale threshold value and the target gray scale ratio value is smaller than the target gray scale threshold value;
the determining module is further specifically:
when the target gray scale comparison result is that the target gray scale ratio is greater than or equal to the target gray scale threshold, 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 shows that the target gray scale occupation ratio is smaller than the target gray scale threshold, 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 predetermining module, wherein the gamma voltage predetermining module is specifically as follows:
the gamma voltage generating circuit is used for 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;
a voltage value for determining a fourteenth-stage target gamma voltage, the fourteenth-stage target gamma voltage having the same voltage value as a thirteenth-stage gamma voltage among the normal gamma voltages;
and the gamma voltage generator is used for 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.
The device also comprises a target gray scale determining module, wherein the target gray scale determining module is specifically as follows:
used for determining the target gray-scale end point;
the device is used for determining a target gray scale value range according to the target gray scale endpoint and the highest gray scale endpoint;
and the gray scale value range is used 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 the image quantity of all gray-scale values in the target gray-scale value range in the image data is determined to obtain the target gray-scale image quantity.
The device also comprises a display module, wherein the display module specifically comprises:
the display data is used for determining the display data of the next display picture according to the picture image data;
for displaying according to the display data.
On the other hand, the application also provides a display device, and the display device adopts any one of the working voltage determining method or the working voltage determining device.
The display device needs different power supply voltages and gamma voltages for different display pictures, and can analyze the ratio of the number of picture images at a target gray scale value to the total number of the picture images after obtaining picture image data of the next display picture of the display device, and determine the target power supply voltage and the target gamma voltage input into the display device according to the target gray scale ratio value, so that the target power supply voltage and the target gamma voltage input into the display device can be dynamically adjusted according to different display pictures, and therefore, when the display device displays a low-gray-scale picture, the application of high-voltage current in the display device can be reduced, and further, the energy consumption of the display device can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a method for determining operating voltage in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an embodiment of a display driving module according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart diagram illustrating an embodiment of a method for determining operating voltage in an embodiment of the present application;
FIG. 4 is a schematic flow chart diagram illustrating an embodiment of a method for determining operating voltage in an embodiment of the present application;
FIG. 5 is a diagram illustrating two voltage relationships in a memory module according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an embodiment of the operating voltage determining apparatus in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to 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 relative importance or implying any number of technical features indicated. Thus, a feature defined as "first", "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, the word "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 the purpose 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 are not shown in detail to avoid obscuring 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 embodiments of the present application provide a method and an apparatus for determining an operating voltage, and a display device, which are described in detail below.
As shown in fig. 1, which is a schematic flow chart of an embodiment of a working voltage determining method in the embodiment of the present application, the working voltage determining method includes the following steps 101 to 104:
101. picture image data of a next display picture of the display device is acquired.
In this embodiment, the Display device may be, for example, a Liquid Crystal Display (LCD) or an Organic Light Emitting Diode (OLED) Display, the Display includes a Display driving module, a Display panel and an external memory, and in the application process, the external memory inputs the image data of the next frame of Display image to be displayed to the Display driving module, the Display driving module analyzes the image data according to the image data, and outputs the corresponding Display driving voltage to the Display panel to drive the Display panel to Display.
In the embodiment, the display driving voltage includes a power voltage AVDD and fourteen gamma voltages Gam 1-Gam 14, and the power voltage AVDD and the fourteen gamma voltages Gam 1-Gam 14 are dynamically adjusted according to different image data of the display, so as to reduce the power consumption of the display.
102. And determining the image quantity of which the image gray-scale value is the preset target gray-scale value in the image data to obtain the target gray-scale image quantity.
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 picture image data after receiving picture image data of a next frame of display picture input by an external memory, and analyzes image numbers of different gray scales in the picture image data to determine a gray scale number at a preset target gray scale value in the picture image data, so as to obtain a target gray scale image number. For example, when the preset target gray scale value is set to 233, the timing controller TCON analyzes that 30 gray scales with a gray scale value of 233 in the image data are obtained, and the number of the obtained target gray scales is 30, and the preset target gray scale value may also be a target gray scale range formed by a plurality of gray scales with different gray scale values.
103. And calculating the ratio of the number of the target gray-scale images to the total number of the images of the image data to obtain the ratio of the target gray-scale images.
And after the number of the target gray-scale images is obtained, calculating the ratio of the number of the target gray-scale images to the total number of the images of the image data to obtain the ratio of the target gray-scale images. For example, if the size of the screen image data is 100 × 100 — 10000 and the number of the obtained target gradations is 30, the calculated target gradation proportion value 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 ratio.
Specifically, the timing controller TCON determines a gray scale proportion in the currently input picture image data of the next frame of picture according to the target gray scale proportion value obtained by the analysis, so as to analyze a gray scale type of the current picture image data, wherein the gray scale type of the picture image data includes low gray scale picture image data or high gray scale picture data.
Therefore, determining a target power voltage input to the display device and a target gamma voltage corresponding to the target power voltage according to the target gray scale fraction value includes:
determining the gray scale type of picture image data input into the display device according to the target gray scale 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 timing controller TCON is determined to be low-gray-scale image data according to the target gray-scale ratio, the timing 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 transmits the low-gray-scale image data, the low-power-consumption power supply voltage and the corresponding low-power-consumption gamma voltage group to the display drive IC; on the contrary, the same principle is applied,
when the input of the input end of the timing controller TCON is determined to be high gray scale image data according to the target gray scale ratio, the conventional power supply voltage corresponding to the flash of the storage module is read by the timing controller TCON through the detection and analysis function and written into the digital power management integrated circuit PMIC, and the high gray scale image data, the conventional power supply voltage and the corresponding conventional gamma voltage group are transmitted to the display drive IC.
The display device needs different power supply voltages and gamma voltages for different display pictures, and can analyze the ratio of the number of picture images at a target gray scale value to the total number of the picture images after obtaining picture image data of the next display picture of the display device, and determine the target power supply voltage and the target gamma voltage input into the display device according to the target gray scale ratio value, so that the target power supply voltage and the target gamma voltage input into the display device can be dynamically adjusted according to different display pictures, and therefore, when the display device displays a low gray scale picture, the application of high voltage current in the display device can be reduced, the energy consumption of the display device is further reduced, and the display effect of the display picture cannot be influenced while the power consumption is reduced.
In another embodiment of the present application, the preset target gray scale value may be a single target gray scale value, or a target gray scale range formed by a plurality of adjacent continuous target gray scale values, and in order to reduce the jump frequency of the power voltage inputted to the PMIC, the target gray scale range formed by a plurality of target gray scale values is usually adopted to determine the gray scale fraction in the frame image data in the practical application process. Therefore, in the present embodiment, it is necessary to set the target gray scale range as needed.
Specifically, as shown in fig. 3, before acquiring picture image data of a next display picture of the display device, the method includes the following steps 201 to 203:
201. and determining the end point of the target gray scale.
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 point in the full gray scale can be selected as the target gray scale endpoint according to actual needs. After selecting a plurality of target gray scale end points, dividing a low gray scale range, a middle gray scale range and a high gray scale range which meet the requirements by a gray scale range formed by the target gray scale end points.
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 it is necessary to determine the ratio of the middle and high gray levels of the image data, in this embodiment, the high gray level range is used as the target gray level value range, the target gray level end point is determined in the full gray level range according to the actual situation, the target gray level end point and the highest gray level end point of the full gray level are used as two end points of the high gray level range, so as to form the target gray level value range, and all gray level values in the target gray level value range are high gray levels, for example, the gray level end point with the gray level value of 233 is used as the target gray level end point, and the gray level range formed by the gray levels of 233 to 255 is used as the high gray level range, that is, the target gray level value range.
203. And taking all gray-scale values in the target gray-scale value range as target gray-scale values.
And after the target gray scale value range is determined, all gray scale values in the target gray scale value range are taken as target gray scale values. For example, if the target gray scale value range is set to be the gray scale 233 to the gray scale 255, all of the gray scales 233 to 255 are the target gray scale values.
In another embodiment of the present application, determining an image number of which an image gray-scale value is a preset target gray-scale value in picture image data to obtain a target gray-scale image number includes:
and determining the image quantity of all gray-scale values in the range of the target gray-scale value in the image data of the picture to obtain the target gray-scale image quantity.
When the input image data of the picture is received, analyzing the gray scale of the image data of the picture, when the gray scale value of a certain gray scale of the image data of the picture is the same as the value of a certain target gray scale value of a target gray scale value range, determining the gray scale as the target gray scale, and counting the image quantity of all the gray scale values in the target gray scale value range in the image data of the picture according to the method to obtain the image quantity of the target gray scale. For example, if the target gray-scale value range is from the gray scale 233 to the gray scale 255, when 30 gray scales with the gray scale value of 233, 20 gray scales with the gray scale value of 244, and 20 gray scales with the gray scale value of 253 included in the frame image data are analyzed, the number of the counted target gray-scale images is 70.
In another embodiment of the present application, as shown in fig. 4, determining a target power voltage input to a display device and a target gamma voltage corresponding to the target power voltage according to a target gray scale ratio value includes the following steps 301 to 302:
301. and comparing the target gray scale ratio with a preset target gray scale threshold value to obtain a target gray scale comparison result.
The target gray scale comparison result comprises that the target gray scale ratio value is greater than or equal to the target gray scale threshold value and the target gray scale ratio value is smaller than the target gray scale threshold value;
the target gray scale threshold is set manually according to experience, and is used for judging the size of a target gray scale ratio and actually judging the proportion occupied by the number of target gray scale images in image data, namely judging which gray scale level of a low gray scale, a middle gray scale or a high gray scale the image data is in, so as to be convenient for analyzing whether the input target power supply voltage and the target gamma voltage need to be adjusted.
302. 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, specifically comprising:
when the target gray scale comparison result is that the target gray scale ratio is greater than or equal to the target gray scale threshold, determining that the target power voltage is a conventional power voltage, and determining that the target gamma voltage is a conventional gamma voltage corresponding to the conventional power voltage;
specifically, when the target gray scale comparison result is that the target gray scale ratio is greater than or equal to the target gray scale threshold, it indicates that the input of the input terminal of the timing controller TCON is the high gray scale image data, and at this time, the power supply voltage does not need to be reduced, 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 ratio is smaller than the target gray scale threshold, 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;
specifically, when the target gray scale comparison result indicates that the target gray scale ratio is smaller than the target gray scale threshold, it indicates that the input of the input terminal of the timing controller TCON is low gray scale image data, and at this time, the power supply voltage may be reduced to reduce power consumption, so that the target power supply voltage input to the display device is determined to be the low power supply voltage, and the target gamma voltage is determined to be the low power gamma voltage corresponding to the low power supply voltage.
The following more specific examples illustrate the solution proposed in the present application.
For example, the total image number of the screen image data is set to 100 × 100 — 10000, a high gray scale range composed of the gray scales 233 to 255 is set as a target gray scale value range, and a target gray scale threshold value is set to 0.2%;
in the image data of the input end of the time sequence controller TCON, the number of images of high gray scale images is 15, namely the target gray scale value in the range of the target gray scale value is 15, the calculated target gray scale ratio is 0.15%, the target gray scale ratio is 0.15% and is compared with the target gray scale threshold value 0.2%, the obtained target gray scale comparison result shows that the target gray scale ratio is 0.15% and is smaller than the target gray scale threshold value 0.2%, the image data input by the input end of the time sequence controller TCON is low gray scale image data, so that the target power voltage input to a display device is determined to be low power consumption power voltage, and the target gamma voltage is determined to be low power consumption gamma voltage corresponding to the low power consumption power voltage;
similarly, in the image data at the input end of the timing controller TCON, the number of the high grayscale images is 30, that is, the target grayscale value within the range of the target grayscale value is 30, the calculated target grayscale proportion value is 0.3%, the target grayscale proportion value is 0.3% and the target grayscale threshold value is 0.2%, and the obtained target grayscale comparison result indicates that the target grayscale proportion value is 0.3% greater than the target grayscale threshold value by 0.2%, which indicates that the image data input at the input end of the timing controller TCON is the high grayscale image data, thereby determining that the target power voltage input to the display device is the conventional power voltage and determining that the target gamma voltage is the conventional gamma voltage corresponding to the conventional power voltage.
In this embodiment, the normal power voltage AVDD and the normal gamma voltage GAM are general driving voltages of the display device, and according to actual requirements, the voltage of the normal power voltage AVDD is reduced to obtain a low-power-consumption power voltage AVDD ', the voltage of the first-stage gamma voltage GAM1 in the normal gamma voltage GAM is reduced, the reduced first-stage gamma voltage GAM1 is used as a first-stage gamma voltage GAM 1' of the low-power-consumption gamma voltage GAM ', and the second-stage gamma voltage GAM2 to the fourteenth-stage gamma voltage GAM14 in the normal gamma voltage GAM are adaptively adjusted to obtain a low-power-consumption gamma voltage GAM'.
Therefore, 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 voltage;
determining a fourteenth-stage target gamma voltage having the same voltage value as that of a thirteenth-stage gamma voltage among the conventional gamma voltages;
and 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 respectively.
In the application, a storage module is adopted to store 2 conventional groups of different power supply voltages and gamma voltages (a conventional power supply voltage AVDD, a conventional gamma voltage GAM + a low energy consumption power supply voltage AVDD 'and a low energy consumption gamma voltage GAM'), wherein in the storage module, the specific corresponding relation between the conventional power supply voltage AVDD and the conventional gamma voltage GAM and the low energy consumption power supply voltage AVDD 'and the low energy consumption gamma voltage GAM' is shown in figure 5.
In another embodiment of the present application, after acquiring picture image data of a next display picture of a display device, the method includes:
and determining the display data of the next display picture according to the picture image data, and displaying according to the display data.
In order to better implement the working voltage determining method in the embodiment of the present application, based on the working voltage determining method, an embodiment of the present application further provides a working voltage determining apparatus, as shown in fig. 6, where the working voltage determining apparatus 400 includes:
an obtaining module 401, configured to obtain picture image data of a next display picture of the display device;
a counting module 402, configured to determine an image quantity that an image gray-scale value in the picture image data is a preset target gray-scale value, so as to obtain a target gray-scale image quantity;
a calculating module 403, configured to calculate a ratio of the number of target grayscale images to the total number of image data of the frame image, to obtain a target grayscale ratio value;
the determining module 404 is configured to determine a target power voltage input to the display device and a target gamma voltage corresponding to the target power voltage according to the target gray scale ratio.
The device still includes:
and a storage module for storing the target power voltage and the target gamma voltage, and for performing data transmission with the determination module 404.
The determining module 404 is specifically:
the target gray scale ratio is compared with a preset target gray scale threshold value to obtain a target gray scale comparison result;
and the gamma voltage generation circuit is used for inputting a target power supply voltage and a target gamma voltage corresponding to the target power supply voltage to the display device according to the determined target gray scale comparison result.
The target gray scale comparison result comprises that the target gray scale ratio value is greater than or equal to the target gray scale threshold value and the target gray scale ratio value is smaller than the target gray scale threshold value;
the determining module 404 further specifically includes:
when the target gray scale comparison result is that the target gray scale ratio is greater than or equal to the target gray scale threshold, 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 shows that the target gray scale ratio is smaller than the target gray scale threshold, 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 apparatus further comprises a gamma voltage predetermining module 404, wherein the gamma voltage predetermining module 404 is specifically:
the gamma voltage generating circuit is used for determining a first-stage target gamma voltage, and 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 voltage;
used for confirming the fourteenth goal gamma voltage, the voltage value of the fourteenth goal gamma voltage is the same as voltage value of the thirteenth gamma voltage in the regular gamma voltage;
and the first-stage low-energy consumption gamma voltage and the fourteenth-stage low-energy consumption gamma voltage are used as the low-energy consumption gamma voltage respectively.
The apparatus further comprises a target gray level determining module 404, wherein the target gray level determining module 404 is specifically:
used for determining the target gray-scale end point;
the device is used for determining a target gray scale value range according to the target gray scale end point and the highest gray scale end point;
and the gray-scale value range is used for taking all gray-scale values in the target gray-scale value range as target gray-scale values.
The statistical module 402 specifically includes:
the method is used for determining the image quantity of all gray-scale values in the target gray-scale value range in the image data to obtain the target gray-scale image quantity.
The obtaining module 401 specifically includes:
the display device is used for acquiring display data currently input by the display device;
for determining picture image data for a next display picture based on the display data.
On the other hand, the present application further provides a display device, where the display device includes the display driving module shown in fig. 2, and the display driving module includes a timing controller TCON, a digital power management integrated circuit PMI C, and a display driving IC, where the display device employs the above-mentioned operating voltage determining method or the above-mentioned operating voltage determining apparatus.
The working voltage determining method, the working voltage determining device and the display device provided by the embodiments of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the embodiments above is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An operating voltage determination method, comprising:
acquiring picture image data of a next display picture of the display device;
determining the number of images with image gray scale values as preset target gray scale values in the picture image data to obtain the number of target gray scale images;
calculating the ratio of the number of the target gray scale images to the total number of the images of the picture image data to obtain a target gray scale ratio value;
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 ratio.
2. The operating voltage determining method of claim 1, wherein the 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 fraction value comprises:
comparing the target gray scale 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.
3. The operating voltage determining method of claim 2, wherein the determining a target gamma voltage corresponding to a target power voltage and a target power voltage input to the display device according to the determined target gray scale comparison result comprises:
the target gray scale comparison result comprises that the target gray scale ratio value is greater than or equal to the target gray scale threshold value and the target gray scale ratio value is smaller than the target gray scale threshold value;
when the target gray scale comparison result is that the target gray scale ratio is greater than or equal to the target gray scale threshold, 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 shows that the target gray scale occupation ratio is smaller than the target gray scale threshold, 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.
4. The operating voltage determining method according to claim 1, wherein before the acquiring picture image data of a next display picture of the display device, the method comprises:
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 voltage;
determining a fourteenth-stage target gamma voltage having the same voltage value as that of a thirteenth-stage gamma voltage among the normal gamma voltages;
and 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 respectively.
5. 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 comprises:
determining a target gray scale endpoint;
determining a target gray scale value range according to the target gray scale end point and the highest gray scale end point;
and taking all gray-scale values in the target gray-scale value range as the target gray-scale values.
6. The method for determining operating voltage according to claim 5, wherein the determining the number of images in which the image gray-scale value in the image data is a preset target gray-scale value to obtain the target gray-scale image number comprises:
and determining the image quantity of all gray-scale values in the range of the target gray-scale value in the picture image data to obtain the target gray-scale image quantity.
7. The operating voltage determining method according to claim 1, wherein after acquiring picture image data of a next display picture of the display device, the method comprises:
determining display data of a next display picture according to the picture image data;
and displaying according to the display data.
8. An operating voltage determining apparatus, characterized in that the apparatus comprises:
the acquisition module is used for acquiring the picture image data of the next display picture of the display device;
the statistical module is used for determining the number of images with image gray scale values being preset target gray scale values in the picture image data to obtain the number of target gray scale images;
the calculation module is used for calculating the ratio of the number of the target gray-scale images to the total number of the images of the picture image data to obtain a target gray-scale ratio value;
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 ratio.
9. The operating voltage determining apparatus of claim 8, wherein the apparatus further comprises:
and the storage module is used for storing the target power supply voltage and the target gamma voltage and is used for carrying out data transmission with the determination module.
10. A display device, characterized in that the display device employs the operating voltage determining method of any one of claims 1 to 7 or the operating voltage determining apparatus of claims 8 to 9.
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