CN114203086A - Method, device and equipment for thermal compensation correction - Google Patents

Method, device and equipment for thermal compensation correction Download PDF

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Publication number
CN114203086A
CN114203086A CN202111460596.XA CN202111460596A CN114203086A CN 114203086 A CN114203086 A CN 114203086A CN 202111460596 A CN202111460596 A CN 202111460596A CN 114203086 A CN114203086 A CN 114203086A
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Prior art keywords
display unit
data
thermal compensation
cold screen
coefficient
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CN202111460596.XA
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Chinese (zh)
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CN114203086B (en
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何国经
欧兴涛
从洪春
杨城
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Xian Novastar Electronic Technology Co Ltd
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Xian Novastar Electronic 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application relates to the technical field of display, and provides a method, a device and equipment for thermal compensation correction, which are applied to a display unit, wherein the display unit comprises a plurality of subunits, each subunit in the subunits stores a cold screen correction coefficient, and the display effect of the display unit can be improved, and the method comprises the following steps: acquiring a cold screen correction coefficient of each subunit, wherein the cold screen correction coefficient is determined according to initial data and target data of the subunits in a cold screen state, and the initial data comprises at least one of initial brightness, initial chromaticity and initial brightness; acquiring a thermal compensation coefficient of the display unit, wherein the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state; and correcting the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit.

Description

Method, device and equipment for thermal compensation correction
Technical Field
The present application relates to the field of display technologies, and in particular, to a method, an apparatus, and a device for thermal compensation correction.
Background
With the development of display technology and the popularization of display screens, people also put forward higher and higher requirements on the display quality of the display screens. The more uniform the luminosity of the display screen, the higher the display quality of the display screen and the better the display effect of the display screen. However, in the actual use process, it is easy to find that the luminosity of the display screen is easily affected by the temperature to change, so that the display effect of the display screen is poor. Therefore, how to improve the uniformity of the luminosity of the display screen and improve the display effect of the display screen become a research hotspot in the field.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method, an apparatus, and a device for thermal compensation correction, which can improve the uniformity of luminance of a display screen and improve the display effect of the display screen.
The embodiment of the present application is implemented as follows, in a first aspect, an embodiment of the present application provides a method for thermal compensation correction, which is applied to a display unit, where the display unit includes a plurality of sub-units, and each sub-unit in the plurality of sub-units stores a cold screen correction coefficient, and the method includes: acquiring a cold screen correction coefficient of each subunit, wherein the cold screen correction coefficient is determined according to initial data and target data of the subunits in a cold screen state, and the initial data comprises at least one of initial brightness, initial chromaticity and initial brightness;
and acquiring a thermal compensation coefficient of the display unit, wherein the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state, the first display unit is a display unit, or the first display unit is a sample display unit corresponding to the display unit, and the target correction coefficient of the display unit is obtained according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit, and is used for correcting the display unit.
In the method for thermal compensation and correction provided by the embodiment of the application, after the sub-units are spliced into the display unit, the cold screen correction coefficient and the thermal compensation coefficient which correspond to the sub-units respectively when the whole display unit is in different states are collected, and the data of the sub-units are corrected based on the cold screen correction coefficient and the thermal compensation coefficient of the sub-units respectively, so that when the whole display unit is in a thermal balance state, each sub-unit can be displayed by target data, and the correction of the whole display unit is realized.
On the one hand, because the cold screen correction coefficient and the thermal compensation coefficient of each subunit are collected when the whole display unit is in a cold screen state and a thermal balance state after the subunits are spliced into the display unit in the method for thermal compensation correction provided by the application, after respective data are corrected by using the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, when the whole display unit is in the thermal balance state, each subunit can be displayed by target data, thereby ensuring the uniformity of the luminosity of the whole display unit and improving the display effect.
On the other hand, in the thermal compensation correction method provided by the application, the respective data are corrected by using the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, so that each subunit can be displayed by using the target data when the whole display unit is in a thermal equilibrium state no matter how the splicing sequence of the subunits in the display unit is changed. Therefore, the display units do not need to be spliced according to the fixed template, and the display units can be flexibly spliced.
In one embodiment, the cold shield correction factor is determined according to the initial data and the target data of the subunit in the cold shield state, and comprises the following steps:
the cold screen correction coefficient is determined according to the initial data and the target data of the three primary colors of the subunit in the cold screen state;
and/or the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit when the first display unit reaches a thermal equilibrium state, and the thermal compensation coefficient comprises the following steps:
the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and three primary color data of the first display unit in a cold screen state, and the three primary color data when the first display unit reaches a thermal equilibrium state.
The cold screen correction coefficient determined by using the initial data and the target data of the three primary colors in the cold screen state and/or the thermal compensation coefficient determined by using the target data of the first display unit, at least one of the data of the three primary colors of the first display unit in the cold screen state and the data of the three primary colors of the first display unit in the thermal equilibrium state are/is used for correcting the display unit together, the optical display data of the three primary colors are fully used for correcting the display unit, the influence of a plurality of colors in the three primary colors and a plurality of items of data in the initial data on the actual display data of the display unit is considered, the difference displayed by each subunit in the display unit is favorably reduced, and the correction accuracy of the display unit is improved.
In one embodiment, before obtaining the cold screen correction coefficient of each subunit, the method further comprises:
determining a cold screen correction coefficient of each subunit according to the initial data and the target data of each subunit in the cold screen state, and storing the cold screen correction coefficient into each subunit;
acquiring a cold screen correction coefficient of each subunit, wherein the cold screen correction coefficient comprises the following steps:
and respectively acquiring the cold screen correction coefficient of each subunit from each subunit.
In the above embodiment, when the display unit is actually corrected, the cold screen correction coefficient corresponding to each sub-unit is directly and respectively obtained from each sub-unit, so that the time for obtaining the cold screen correction coefficient of the sub-unit can be effectively shortened, and the correction efficiency of the display unit is accelerated.
In one embodiment, before obtaining the thermal compensation coefficient of the display unit, the method further comprises:
determining a thermodynamic compensation coefficient of the display unit according to at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state, and storing the thermodynamic compensation coefficient into control equipment corresponding to the display unit;
acquiring a thermal compensation coefficient of a display unit, comprising:
the thermal compensation coefficient of the display unit is obtained from the control device of the display unit.
In the embodiment, the thermal compensation coefficient of the display unit is obtained from the control device of the display unit, so that the thermal compensation coefficient of the display unit can be conveniently obtained when the display unit is corrected, and the speed of correcting the display unit is accelerated.
In one embodiment, obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit, where the target correction coefficient is used to correct the display unit, and the method includes:
obtaining a target correction coefficient according to the product of the thermal compensation coefficient and the cold screen correction coefficient;
and correcting the display unit according to the target correction coefficient.
The cold screen correction coefficients and the thermal compensation coefficients corresponding to the display units in different states are obtained, so that the target correction coefficients for correcting the display units are determined, no matter how the splicing sequence of the subunits in the display units changes, after each subunit in the display units is corrected through the target correction coefficients, the target data can be displayed when the display units are in a thermal balance state, the display units do not need to be spliced according to a fixed template, and the display units can be spliced flexibly.
In one embodiment, the thermal compensation coefficient is determined by: c _ h ═ T × O _ h-1C _ h represents a thermal compensation coefficient, T represents target data of the first display unit, and O _ h represents data of the first display unit in a thermal equilibrium state after cold screen correction;
or C _ h ═ O _ C ═ O _ h-1Wherein C _ h represents a thermal compensation coefficient, O _ C represents data of the first display unit in a cold screen state, and O _ h represents data of the first display unit in a thermal equilibrium state when the first display unit is not correctedAnd (4) data.
The embodiment comprises two different methods for determining the thermal compensation coefficient, and the thermal compensation coefficient of the display unit can be obtained by different methods according to different practical application scenes, so that the determination mode of the thermal compensation coefficient is further expanded.
In one embodiment, after obtaining the thermal compensation coefficient of the display unit, the method further comprises:
and preprocessing the thermal compensation coefficient by adopting a noise reduction algorithm or a smoothing algorithm to obtain a preprocessed thermal compensation coefficient. The influence of abnormal data on the thermal compensation coefficient is avoided, the effectiveness of the thermal compensation coefficient is improved, and the accuracy of correction on the display unit is further improved.
In one embodiment, the display unit is a box body, and the sub-unit is a lamp panel;
or the display unit is a bracket, and the sub-unit is a box body or a lamp panel;
alternatively, the display unit is a thermal cycle unit.
In this embodiment, if the display element is the box, the subunit is the lamp plate, then utilize the cold screen correction coefficient of each lamp plate that acquires and the heating power compensation coefficient of box, rectify the back to the data of each lamp plate in the box, can make when whole box is in the heat balance state, every lamp plate can both show with the target data, has effectively guaranteed the homogeneity of whole box luminosity, has promoted the display effect of box.
If the display element is the bracket, and the subelement is box or lamp plate, then utilize the cold screen correction coefficient of each box or each lamp plate that acquires and the heating power compensation coefficient of bracket, rectify the back to the data of each box or each lamp plate in the bracket, can make when whole bracket is in the heat balance state, every box or lamp plate can both show with the target data, has effectively guaranteed the homogeneity of whole bracket luminosity, has promoted the display effect of bracket.
Similarly, if the display unit is a thermal cycle unit, the data of each subunit in the thermal cycle unit can be corrected by using the acquired target correction coefficient of the thermal cycle unit, so that when the whole thermal cycle unit is in a thermal equilibrium state, each subunit in the thermal cycle unit can be displayed by using the target data, the uniformity of the luminosity of the whole thermal cycle unit is ensured, and the display effect of the thermal cycle unit is improved.
In a second aspect, an embodiment of the present application provides a thermal compensation correction device, which is applied to a display unit, where the display unit includes a plurality of sub-units, and each sub-unit in the plurality of sub-units stores a cold screen correction coefficient, and the device includes:
the first acquisition unit is used for acquiring a cold screen correction coefficient of each subunit, wherein the cold screen correction coefficient is determined according to initial data and target data of the subunits in a cold screen state, and the initial data comprises at least one of initial brightness, initial chromaticity and initial brightness;
the second acquisition unit is used for acquiring a thermal compensation coefficient of the display unit, wherein the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit when the first display unit reaches a thermal equilibrium state, and the first display unit is a display unit or a sample display unit corresponding to the display unit;
and the correction unit is used for obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit, and the target correction coefficient is used for correcting the display unit.
In a third aspect, an embodiment of the present application provides a thermal compensation correction apparatus, including: a processor and a memory, the memory for storing a computer program, the processor for invoking and running the computer program from the memory, causing the apparatus to perform the method of any of the first aspects.
In a fourth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the processor is caused to execute the method of any one of the first aspect.
In a fifth aspect, an embodiment of the present application provides a computer program product, where the computer program product includes: computer program code which, when executed by a computer, causes the computer to perform the method of any of the first aspects.
It is understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description of the first aspect, and are not described herein again.
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 embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flow chart of a method of thermal compensation calibration according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a thermal compensation calibration apparatus according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a thermal compensation correction apparatus according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
With the development of display technology and the popularization of display screens, people also put forward higher and higher requirements on the display quality of the display screens. The more uniform the luminosity of the display screen, the higher the display quality of the display screen and the better the display effect of the display screen. However, in the actual use process, it is easy to find that the luminosity of the display screen is easily affected by the temperature to change, so that the display effect of the display screen is poor. Therefore, how to improve the uniformity of the luminosity of the display screen and improve the display effect of the display screen become a research hotspot in the field.
As an example, a Light Emitting Diode (LED) display screen is taken as an example. The LED display screen has the characteristics of low power consumption, wide visual range, high resolution and the like, and is widely applied to various life scenes such as traffic lights, literature and art exchanges and the like. People usually adopt a thermal compensation correction method and a method for establishing a conversion matrix to improve the uniformity of the luminosity of the LED display screen and improve the display effect of the LED display screen.
The thermal compensation correction method is characterized in that each lamp panel or each box body forming the LED display screen is preheated, and each lamp panel or each box body is corrected after reaching a thermal balance state. The method has the advantages that the preheating time is long, the correction efficiency is low, and after the lamp panels or the box bodies are spliced into the LED display screen, the heating condition of each lamp panel or each box body of the LED display screen can be changed when the LED display screen reaches a thermal balance state, so that after the lamp panels or the box bodies are spliced into the LED display screen, the uniformity of the luminosity of the LED display screen cannot reach the expected effect.
The method for establishing the conversion matrix is to establish the conversion matrix between the cold screen data and the hot screen data of the lamp panel (or the box body), that is, the method for establishing the conversion matrix by taking the box body as an example is to firstly collect the cold screen data of the box body, then collect the hot screen data after the box body reaches a thermal equilibrium state, and establish the conversion matrix corresponding to the cold screen data and the hot screen data according to the collected cold screen data of the box body and the hot screen data of the box body. On one hand, the method for establishing the corresponding conversion matrix needs to splice the lamp panels or the box bodies according to a fixed sequence, so that the LED display screen cannot be flexibly spliced. On the other hand, if a plurality of boxes are spliced into the LED display screen, but the boxes are not spliced according to the sequence corresponding to the conversion matrix, the LED display screen spliced by the boxes cannot be corrected by using the conversion matrix because the splicing sequence of the boxes does not correspond to the conversion matrix. If the sequence of the spliced box bodies changes, the corresponding conversion matrixes also change, and the LED display screen is corrected by using the conversion matrixes which do not correspond, so that the corrected LED display screen still cannot achieve the expected correction effect.
In order to improve the uniformity of the luminosity of the display screen and improve the display effect of the display screen, the method for thermal compensation correction provided by the embodiment of the application collects the cold screen correction coefficient and the thermal compensation coefficient which correspond to each subunit when the whole display unit is in different states after all the subunits are spliced into the display unit, corrects the respective data based on the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, so that when the whole display unit is in a thermal balance state, each subunit can be displayed by target data, and the correction of the display unit is completed.
On the one hand, because the cold screen correction coefficient and the thermal compensation coefficient of each subunit are collected when the whole display unit is in a cold screen state and a thermal balance state after the subunits are spliced into the display unit in the method for thermal compensation correction provided by the application, after respective data are corrected by using the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, when the whole display unit is in the thermal balance state, each subunit can be displayed by target data, thereby ensuring the uniformity of the luminosity of the whole display unit and improving the display effect.
On the other hand, in the thermal compensation correction method provided by the application, the respective data are corrected by using the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, so that each subunit can be displayed by using the target data when the whole display unit is in a thermal equilibrium state no matter how the splicing sequence of the subunits in the display unit is changed. Therefore, the display units do not need to be spliced according to the fixed template, and the display units can be flexibly spliced.
The method for thermal compensation correction provided by the embodiment of the present application may be applied to various application scenarios, for example, may be applied to a correction scenario for an LED display screen on an automatic production line, and may also be applied to a correction scenario supporting future-oriented display units related to other display units, which is not limited in this application.
It should be understood that the method of the present application may be used to calibrate a Display unit, which may be an LED Display unit, a Liquid Crystal Display (LCD) Display unit, an Organic Light-Emitting Diode (OLED) Display unit, or the like.
It should be noted that the main executing body of the method for thermal compensation and correction provided by the present application may be a terminal device associated with a display unit to be corrected, that is, in a correction scenario for an LED display screen on the above automatic production line, the display unit to be corrected is the LED display screen, and the terminal device associated with the LED display screen may be a device such as a notebook Computer, a palm Computer, a Personal Computer (PC), a tablet Computer, and a mobile phone. It should be understood that the application scenarios are different, and the display unit to be corrected and the terminal device may be different.
The following will exemplarily describe a method for thermal compensation correction provided by the present application by taking an LED display unit as an example.
Before explaining the embodiments of the present application, the related contents of the LED display screen will be described.
Generally, an LED display screen is a screen body formed by splicing a plurality of lamp panels, the lamp panels are the minimum units forming the LED display screen, wherein one lamp panel comprises a plurality of LED lamp beads, and the specific number of the LED lamp beads in one lamp panel is determined according to the actual application condition.
The box body (namely the LED box body) is a screen body formed by splicing a plurality of lamp panels. Wherein, the quantity of the lamp plate of concatenation one-tenth box can be confirmed according to the practical application demand. Exemplarily, in actual life, most LED display screen manufacturers can splice 6 lamp plates and make up into a box, and some LED display screen manufacturers can splice 4 lamp plates and make up into a box.
The bracket (namely the LED bracket) is a screen body formed by splicing a plurality of the box bodies. The number of the box bodies spliced into the LED bracket can be determined according to actual application requirements. For example, according to actual use requirements, most LED display screen manufacturers splice 2 boxes to form a bracket.
Correspondingly, one LED display screen can be formed by splicing a plurality of the brackets, so that the LED display screen can be sequentially divided into a lamp panel, a box body, the brackets and the LED display screen from small to large according to the number of the lamp panels.
It should be noted that the lamp panel is usually provided with a memory device. For example, the Memory device may be a Flash Memory, i.e., Flash, which is used for data storage, and data stored in the Flash cannot be lost due to power failure. In order to ensure the security of stored data, a Memory device generally disposed on the lamp panel includes but is not limited to a non-volatile Memory device such as a Flash or a Read-Only Memory (ROM), and the Memory device disposed in the lamp panel may have different actual application requirements.
Accordingly, depending on the actual use, a receiving card is usually disposed in a cradle or a housing. The receiving card is also called a control card, and is used for receiving an instruction sent by a Personal Computer (PC) or application software and decoding the received instruction to control the on/off of the LEDs in the LED display screen.
The correction process to the LED display screen is essentially to promote the homogeneity of the LED display screen luminosity, reduce the difference that each LED shows in the LED display screen, namely through adjusting the display data (namely the pixel) of the lamp pearl in every lamp plate on the LED display screen, make each LED's luminosity more even in the LED display screen, let the image picture that the LED display screen shows more exquisite to promote the display effect of LED display screen.
The technical solution of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
In a possible implementation manner, as shown in fig. 1, a flowchart of a method for thermal compensation correction provided in an embodiment of the present application is shown, and referring to fig. 1, the method is applied to a display unit, where the display unit includes a plurality of sub-units, and a cold-shield correction coefficient is stored in each of the sub-units of the plurality of sub-units.
Illustratively, when the method is applied to a correction scene of an LED display screen on an automatic production line, the display unit may refer to the LED display screen, and the sub-units may be lamp panels spliced into the LED display screen.
The method of thermodynamic compensation correction includes the following steps S101-S103.
S101, acquiring a cold screen correction coefficient of each subunit, wherein the cold screen correction coefficient is determined according to initial data and target data of the subunits in a cold screen state, and the initial data comprises at least one of initial brightness, initial chromaticity and initial brightness.
The cold screen state refers to a state in which the ambient temperature of the display unit or the sub-unit is room temperature.
The initial data includes at least one of an initial luminance of the display subunit, an initial chrominance of the display subunit, and an initial luminance of the display subunit.
The target data is data that is artificially preset in order to make the display effect of each sub-unit in the display unit the same. The target data includes at least one of an initial luminance, an initial chromaticity, and an initial luminance chromaticity, corresponding to the initial data. It is understood that the target data is data corresponding to the initial data.
It should be noted that, the present application does not limit the representation form of the target data at all, and the representation form of the target data may be direct target display data according to different practical application scenarios, for example, the display unit displays at the target brightness value 5; the representation form of the target data can also be a gray scale value, for example, the gray scale value corresponding to green in the display unit is 128; the representation of the target data may also be other values that can represent the brightness of the display unit.
In this application embodiment, in order to correct the LED display unit accurately and improve the display effect of the corrected LED display unit, the cold screen correction coefficient is determined according to the initial data and the target data of the subunit in the cold screen state, and includes: and the cold screen correction coefficient is determined according to the initial data and the target data of the three primary colors of the subunit in the cold screen state.
Wherein the three primary colors refer to red, green and blue. The initial data includes initial luminance and chrominance data corresponding to three colors of the three primary colors, and correspondingly, the target data includes target luminance and chrominance data corresponding to three colors of the three primary colors.
According to different practical application conditions, the initial data can be initial brightness data of three primary colors corresponding to the display sub-unit; may be the initial chrominance data of the three primary colors corresponding to the display sub-unit; it may also be the initial luminance and chrominance data of the three primary colors corresponding to the display sub-unit.
In one possible embodiment, the initial data may be at least one of any one of three primary colors, any two colors, and three colors. That is to say, taking the initial luminance data in the initial data as an example, the initial data may be the initial luminance data corresponding to any one of the three primary colors of the display sub-unit, may be the initial luminance data corresponding to any two of the three primary colors of the display sub-unit, and may also be the initial luminance data corresponding to three of the three primary colors of the display sub-unit; taking the initial chrominance data in the initial data as an example, the initial data may be initial chrominance data corresponding to any one of three primary colors of the display sub-unit, may be initial chrominance data corresponding to any two of the three primary colors of the display sub-unit, and may also be initial chrominance data corresponding to three of the three primary colors of the display sub-unit; taking the initial luminance and chrominance data in the initial data as an example, the initial data may be initial luminance and chrominance data corresponding to any one of three primary colors of the display sub-unit, may be initial luminance and chrominance data corresponding to any two of three primary colors of the display sub-unit, and may also be initial luminance and chrominance data corresponding to three of three primary colors of the display sub-unit.
For example, a pixel point a1 of a subunit a in the display unit is taken as an example, and the luminance data of green in the target data is taken as an example. Assume that the target brightness value of green of the preset pixel point a1 is 5. Then, according to actual tests, when the initial brightness data corresponding to the green color of the pixel point a1 is set to 10, and the actual display brightness of the pixel point a1 can reach the target brightness value of 5 when the display unit is in the cold screen state and the pixel point a1 displays the green color. Therefore, when the initial data of the green color of the pixel a1 is 10, the pixel a1 displays the green color with the target brightness value of 5 when the display unit is in the cold state. Thus, the cold screen correction coefficient corresponding to the pixel point a1 is 0.5.
It is understood that the manner of acquiring the initial data of the three primary colors of the sub-units in the cold-shielding state may be directly acquiring the corresponding initial data of each sub-unit in the display unit in the cold-shielding state by a camera. Or directly acquiring initial data of the sub-unit in a cold screen state according to configuration information of a manufacturer in the process of producing the display unit. The initial data of each subunit in the cold shield state can also be acquired in other ways.
For example, in order to avoid the influence on the subsequent correction of the display unit to be corrected due to the acquisition of the initial data corresponding to the display unit to be corrected in the cold screen state, the initial data corresponding to each subunit in the display unit to be corrected in the cold screen state may be acquired by acquiring the initial data of the template display unit corresponding to the display unit to be corrected, where parameters such as the type, production batch, and specification of each subunit in the template display unit are the same as those of the display unit to be corrected.
In a possible implementation manner, in order to shorten the time for acquiring the cold-shielding correction coefficient of each sub-unit and speed up the correction efficiency for the display unit, before acquiring the cold-shielding correction coefficient of each sub-unit, the method for thermal compensation correction provided by the embodiment of the present application further includes: and determining the cold screen correction coefficient of each subunit according to the initial data and the target data of each subunit in the cold screen state, and respectively storing the cold screen correction coefficient into each subunit. In step S101, obtaining a cold screen correction coefficient of the subunit includes: and respectively acquiring the cold screen correction coefficient of each subunit from each subunit.
That is, when the display unit is corrected, the cold screen correction coefficient corresponding to each sub-unit is directly obtained from the memory device (e.g., Flash) corresponding to each sub-unit.
S102, a thermal compensation coefficient of the display unit is obtained, wherein the thermal compensation coefficient is obtained based on at least one of target data of the first display unit, data of the first display unit in a cold screen state and data of the first display unit when the first display unit reaches a thermal equilibrium state, and the first display unit is a display unit or a sample display unit corresponding to the display unit.
It should be understood that the thermal equilibrium state is a state in which the thermal distribution and the maximum temperature of the display unit are not changed after the display unit is turned on, wherein the sources of the temperature include, but are not limited to, heating of the lamp bead in the display unit, heating of the circuit, heating of the driving chip, heating of the memory device, heating of the power supply, and the like.
The target data is data artificially preset to make the display effect of each sub-unit in the display unit or the sample display unit the same. It is understood that, when the first display unit is a display unit and the target data is obtained from the cold screen correction coefficients of the sub-units in the display unit, the target data corresponding to the sub-units is artificially preset data for making the display effect of each sub-unit in the display unit the same.
It is worth to be noted that the acquisition mode of the thermal compensation coefficient corresponding to the display unit can be determined by directly acquiring target data of the display unit and data when the display unit reaches a thermal equilibrium state; the determination may be made by acquiring target data of a sample display unit that is the same as each parameter of the display unit in terms of type, production lot, specification, and the like, or data when the sample display unit reaches a thermal equilibrium state, or the display unit is equivalent to the sample display unit within an error allowable range.
Correspondingly, in this embodiment of the present application, in order to accurately correct the LED display unit and improve the display effect of the corrected LED display unit, the thermal compensation coefficient is obtained based on at least one of the target data of the first display unit and the data of the first display unit in the cold screen state, and the data of the first display unit when the first display unit reaches the thermal equilibrium state, and includes: the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and three primary color data of the first display unit in a cold screen state, and the three primary color data when the first display unit reaches a thermal equilibrium state.
The display unit is corrected by fully utilizing the optical display data of the three primary colors, and the influence of a plurality of colors in the three primary colors and a plurality of items of data in the initial data on the actual display data of the display unit is considered, so that the display difference of each subunit in the display unit is favorably reduced, and the correction accuracy of the display unit is improved.
Taking one pixel of a subunit in a display unit as an example, the process of obtaining the thermal compensation coefficient includes: assuming that the obtained cold-screen correction coefficient of the pixel is C _ C, in the cold-screen state, the initial data (e.g., initial brightness) of the pixel is O _ C, that is, the target data (e.g., target brightness) T corresponding to the pixel can be determined according to the cold-screen correction coefficient C _ C and the optical data O _ C, and corresponds to the following formula (1):
T＝C_c*O_c (1)
in formula (1), when the target data of the pixel includes luminance data of three colors of three primary colors, C _ C may represent a cold-screen correction coefficient corresponding to the pixel by a matrix of 3 × 3; o _ c may represent the initial data of the pixel by a 3 × 3 matrix, and the initial data includes luminance and chrominance data of three of the three primary colors, i.e., luminance data and chrominance data representing the three primary colors.
If it is defined that the data of the pixel in the sub-unit is O _ h and the thermal compensation coefficient corresponding to the pixel is C _ h when the display unit reaches the thermal equilibrium state after being subjected to cold shielding correction by the cold shielding correction coefficient, the target data T may be as shown in formula (2):
T＝C_h*O_h (2)
by transforming the above equation (2), we can get:
C_h＝T*O_h-1 (3)
and (4) determining the thermal compensation coefficient C _ h corresponding to the pixel when the thermal balance is achieved according to the formula (3).
Based on the above example, it is assumed that one pixel point a1 of the subunit a in the display unit is also taken as an example of the luminance data of green in the target data. The target brightness value corresponding to the green color of the pixel point a1 is preset to be 5, and according to actual tests, when the initial brightness data corresponding to the green color of the pixel point a1 is 10, and the display unit reaches a thermal equilibrium state, when the pixel point a1 displays the green color, the actually displayed brightness value is changed from the initial data 10 to 9, which indicates that the pixel point a1 generates thermal attenuation in the process of reaching the thermal equilibrium, and the thermal attenuation amount can be determined to be 10% according to the tests, namely, the thermal attenuation amount is 90% of the initial configuration value. That is, when the target brightness value corresponding to the pixel point a1 is set to 5, under the influence of temperature factors, the display brightness value corresponding to the pixel point a1 is correspondingly converted to 90% of the target brightness value 5, that is, to 4.5 after reaching thermal equilibrium.
Thus, if the pixel point a1 is still displayed at the target brightness value of 5, the corresponding thermal compensation coefficient can be calculated as
Figure BDA0003387125580000151
. Therefore, the thermodynamic compensation coefficient can be obtained according to the target data and the data when the display unit reaches the thermal equilibrium state after cold screen correction.
In this application, the initial data may include at least one of an initial luminance, an initial chrominance, and an initial luminance chrominance, and the three kinds of data in the initial data are different in difficulty level in acquiring in an actual application process. Because the brightness data in the initial data can be acquired by directly using the camera, and the acquired brightness data corresponds to a specific numerical value, when the initial data is the initial brightness, the thermal compensation coefficient corresponding to the display unit can be acquired by using another possible implementation manner.
Taking one pixel of a sub-unit in a display unit as an example, another embodiment for obtaining the thermal compensation coefficient of the display unit includes the following formula (4):
C_h＝O_c*o_h-1 (4)
in the above equation (4), C _ h represents a thermal compensation coefficient, O _ C represents data of the display unit in a cold state, and O _ h represents data of the display unit when the display unit reaches a thermal equilibrium state without correcting the display unit.
Based on the above example, it is assumed that one pixel point a1 of the subunit a in the display unit is also taken as an example of the luminance data of green in the target data. According to practical tests, when the initial brightness data corresponding to the green color of the pixel point a1 is 10, and the display unit is not subjected to thermal compensation correction, when the pixel point a1 in the thermal equilibrium state displays the green color, the actually displayed brightness value is 9, that is, the data O _ C of the pixel point a1 in the cold screen state is 10, the O _ h is 9, and the thermal compensation coefficient C _ h corresponding to the pixel point a1 is 10
Figure BDA0003387125580000152
Therefore, the thermal compensation coefficient corresponding to the display unit can be directly determined according to the data of the display unit in the cold screen state and the data of the display unit when the display unit reaches the thermal equilibrium state under the condition that the display unit is not corrected.
The method comprises two different methods for determining the thermal compensation coefficient, and the thermal compensation coefficient of the display unit can be obtained by different methods according to different practical application scenes, so that the determination mode of the thermal compensation coefficient is further expanded, and a richer way is provided for the correction of the display unit in the application of real life.
In order to facilitate obtaining the thermal compensation coefficient of the display unit and increase the correction speed, in a possible embodiment, before obtaining the thermal compensation coefficient of the display unit, the method further includes: determining a thermodynamic compensation coefficient of the display unit according to at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state, and storing the thermodynamic compensation coefficient into control equipment corresponding to the display unit; the thermal compensation coefficient of the display unit is obtained by the following steps: the thermal compensation coefficient of the display unit is obtained from the control device of the display unit.
The control device can be a sending card corresponding to the display unit; or a receiving card corresponding to the display unit; the control device can also be a control chip corresponding to the display unit, and the control device is not limited in the application.
Similarly, when the display unit is corrected, the thermal compensation coefficient corresponding to each sub-unit is directly obtained from the receiving card corresponding to the display unit, so that the thermal compensation coefficient of the display unit can be quickly obtained when the display unit is corrected, and the correction rate of the display unit is accelerated.
After the cold screen correction coefficient corresponding to each subunit in the display unit and the thermal compensation coefficient corresponding to the display unit are obtained, the display unit can be adjusted according to the obtained cold screen correction coefficient and the obtained thermal compensation coefficient, so that the influence of the temperature on the actual display effect of the display unit is fully considered.
And S103, obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit, wherein the target correction coefficient is used for correcting the display unit.
It is understood that the display unit is affected by factors such as temperature during the display process, and the correction to the display unit is to make the display unit still display the target data under the influence of the factors.
In one embodiment, obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each sub-unit, where the target correction coefficient is used to correct the display unit, further includes: obtaining a target correction coefficient according to the product of the thermal compensation coefficient and the cold screen correction coefficient; and correcting the display unit according to the target correction coefficient.
Based on the above example of one pixel of a subunit in a display unit, the target correction coefficient corresponding to the pixel may be determined according to equation (5):
C＝C_h*C_c (5)
in the above formula (5), C represents a target correction coefficient, C _ h represents a thermal compensation coefficient, and C _ C represents a cold screen correction coefficient, and the target correction coefficient C may be determined according to a product of the thermal compensation coefficient C _ h and the cold screen correction coefficient C _ C to correct the display unit.
It is worth noting that in order to accurately correct the LED display unit and improve the display effect of the corrected LED display unit, the initial data includes initial luminance and chrominance data corresponding to three colors of three primary colors, and correspondingly, the target data includes target luminance and chrominance data corresponding to three colors of three primary colors. Thus, denotes a matrix multiplication.
Based on the above example, the cold screen correction coefficient of the pixel a1 is obtained to be 0.5, and the thermal compensation coefficient of the pixel a1 is obtained to be
Figure BDA0003387125580000171
Multiplying the thermal compensation coefficient of the pixel point a1 by the cold screen correction coefficient to obtain a target correction coefficient of
Figure BDA0003387125580000172
. That is, the target correction coefficient corresponding to the pixel point a1 is determined to be
Figure BDA0003387125580000173
Then, after the pixel a1 is lit to reach thermal equilibrium, the pixel a1 is actually displayed at the target brightness value of 5. In the practical application process, different target data can be set artificially, and the pixel point a1 is according to the target correction coefficient
Figure BDA0003387125580000174
The display is corrected so that the pixel point a1 can be displayed as target data after thermal equilibrium is reached.
In order to avoid the influence of abnormal data on the thermal compensation coefficient, the utilization rate of the thermal compensation coefficient is improved, and the accuracy of correction on the display unit is further improved, in a possible embodiment, after the thermal compensation coefficient of the display unit is acquired, the method further comprises the following steps: and preprocessing the thermal compensation coefficient by adopting a noise reduction algorithm or a smoothing algorithm to obtain a preprocessed thermal compensation coefficient. Multiplying the cold screen correction coefficient by the preprocessed thermal compensation coefficient to obtain a target correction coefficient; and correcting the display unit by using the target correction coefficient.
Of course, other algorithms may be used to preprocess the thermal compensation coefficients in the embodiment of the present application, and the present application does not limit this.
It should be noted that, in the embodiment of the present application, the display unit is a box body, and the sub-unit is a lamp panel. If the display element is the box, and the subelement is the lamp plate, then utilize the cold screen correction coefficient of each lamp plate that acquires and the thermal compensation coefficient of box, rectify the back to the data of each lamp plate in the box, can make when whole box is in the heat balance state, every lamp plate can both show with the target data, has effectively guaranteed the homogeneity of whole box luminosity, has promoted the display effect of box.
Or the display unit is a bracket, and the sub-unit is a box body or a lamp panel. If the display element is the bracket, and the subelement is box or lamp plate, then utilize the cold screen correction coefficient of each box or each lamp plate that acquires and the heating power compensation coefficient of bracket, rectify the back to the data of each box or each lamp plate in the bracket, can make when whole bracket is in the heat balance state, every box or lamp plate can both show with the target data, has effectively guaranteed the homogeneity of whole bracket luminosity, has promoted the display effect of bracket.
Alternatively, the display unit is a thermal cycle unit. The thermal cycle unit is a physical heat dissipation structure which is formed by splicing a plurality of repeating units and can generate thermal regularity change.
Taking the LED display unit as an example, the thermal cycle unit is a physical heat dissipation structure capable of generating thermal regularity change in the LED display unit, and the physical heat dissipation structure is formed by splicing a plurality of repeating units.
Optionally, in a general case, the thermal change (i.e., the thermal effect) of the LED display unit is generated by heating components such as a lamp bead, a circuit, a driving chip, a memory device, and a power supply, and therefore, the thermal cycle unit corresponding to the LED display unit may also be a repeating unit including components such as a lamp bead, a circuit, a driving chip, a memory device, and a power supply. For example, the thermal cycle unit may be a box or a bracket formed by splicing a plurality of boxes. The scope of the display unit is not limited in any way by the present application.
If the display unit is a thermal cycle unit, the data of each subunit in the thermal cycle unit can be corrected by using the acquired target correction coefficient of the thermal cycle unit, so that when the whole thermal cycle unit is in a thermal equilibrium state, each subunit in the thermal cycle unit can be displayed by using the target data, the uniformity of the luminosity of the whole thermal cycle unit is ensured, and the display effect of the thermal cycle unit is improved.
If the rule of the pixel point changing along with the temperature is trans in the process of defining that the display unit reaches the thermal equilibrium based on the above, when the display unit reaches the thermal equilibrium state, the data O _ h of the display unit in the thermal equilibrium state can be determined according to the target data T and the rule trans changing along with the temperature, see formula (6).
O_h＝trans.*T (6)
From equation (3) and equation (6), the following equation (7) can be derived:
C_h＝T(trans·*T)-1 (7)
since one receiving card is usually disposed in one bracket or one receiving card is disposed in one box, when the thermal compensation coefficients corresponding to the display units are directly obtained from the bracket or the receiving card of the box, it can be known from the above formula (6) and formula (7) that if the target data T of the same display unit remains unchanged and the rules trans of the pixel points at the same positions in different display units (such as the lamp panel, the box or the bracket) changing with the temperature are the same, the thermal compensation coefficients obtained from the same positions in different display units are the same.
Therefore, under the condition that the target data T is kept unchanged, when the plurality of lamp panels are spliced into the box body, the thermal change rules of the pixel points at the same position on different lamp panels are the same, and the obtained thermal compensation coefficients can be applied to other lamp panels spliced into the box body when the thermal compensation coefficients corresponding to the pixels on one lamp panel are obtained. Therefore, even if the splicing sequence of the lamp panels spliced into the box body is changed, the display effect of the box body can be corrected by the method for thermal compensation correction provided by the embodiment of the application.
Or when a plurality of box bodies or lamp panels are spliced into the bracket, in the same way, the thermal change rules of the pixel points at the same position on different box bodies or lamp panels are the same, and then when the thermal compensation coefficient corresponding to each pixel on one of the box bodies or the lamp panels is obtained, the obtained thermal compensation coefficient is applied to other box bodies or lamp panels spliced into the same bracket. Similarly, even if the splicing sequence of the boxes or lamp panels spliced into the bracket is changed, the display effect of the bracket can still be corrected by using the method for thermal compensation correction provided by the embodiment of the application.
Therefore, according to the method for thermal compensation and correction provided by the embodiment of the application, after the sub-units are spliced into the display unit, the cold screen correction coefficient and the thermal compensation coefficient which correspond to the sub-units respectively when the whole display unit is in different states are collected, and the respective data are corrected based on the respective cold screen correction coefficient and the thermal compensation coefficient of the sub-units, so that when the whole display unit is in a thermal balance state, each sub-unit can be displayed by target data, and the correction of the whole display unit is realized.
On the one hand, because the cold screen correction coefficient and the thermal compensation coefficient of each subunit are collected when the whole display unit is in a cold screen state and a thermal balance state after the subunits are spliced into the display unit in the method for thermal compensation correction provided by the application, after respective data are corrected by using the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, when the whole display unit is in the thermal balance state, each subunit can be displayed by target data, thereby ensuring the uniformity of the luminosity of the whole display unit and improving the display effect.
On the other hand, in the thermal compensation correction method provided by the application, the respective data are corrected by using the respective cold screen correction coefficient and the thermal compensation coefficient of each subunit, so that each subunit can be displayed by using the target data when the whole display unit is in a thermal equilibrium state no matter how the splicing sequence of the subunits in the display unit is changed. Therefore, the display units do not need to be spliced according to the fixed template, and the display units can be flexibly spliced.
As shown in fig. 2, an embodiment of the present application provides a thermal compensation correction device, which is applied to a display unit, where the display unit includes a plurality of sub-units, and each sub-unit of the plurality of sub-units stores a cold screen correction coefficient, and the thermal compensation correction device 200 includes:
a first obtaining unit 201, configured to obtain a cold screen correction coefficient of each subunit, where the cold screen correction coefficient is determined according to initial data of the subunit in a cold screen state and target data, and the initial data includes at least one of initial luminance, initial chromaticity, and initial luminance chromaticity;
the second obtaining unit 202 is configured to obtain a thermal compensation coefficient of the display unit, where the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state, and data of the first display unit when the first display unit reaches a thermal equilibrium state, where the first display unit is a display unit, or the first display unit is a sample display unit corresponding to the display unit;
and the correcting unit 203 is used for obtaining a target correcting coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correcting coefficient of each subunit, and the target correcting coefficient is used for correcting the display unit.
In one embodiment, the cold shield correction factor is determined according to the initial data and the target data of the subunit in the cold shield state, and comprises the following steps: the cold screen correction coefficient is determined according to the initial data and the target data of the three primary colors of the subunit in the cold screen state;
and/or the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit when the first display unit reaches a thermal equilibrium state, and the thermal compensation coefficient comprises the following steps: the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and three primary color data of the first display unit in a cold screen state, and the three primary color data when the first display unit reaches a thermal equilibrium state.
In one embodiment, before the first obtaining unit 201 obtains the cold screen correction coefficient of each sub-unit, the apparatus further includes: determining a cold screen correction coefficient of each subunit according to the initial data and the target data of each subunit in the cold screen state, and storing the cold screen correction coefficient into each subunit;
a first obtaining unit 201, further configured to: and respectively acquiring the cold screen correction coefficient of each subunit from each subunit.
In one embodiment, the second obtaining unit 202 obtains the thermal compensation coefficient of the display unit, and the apparatus further includes: determining a thermodynamic compensation coefficient of the display unit according to at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state, and storing the thermodynamic compensation coefficient into control equipment corresponding to the display unit;
the second obtaining unit 202 is further configured to: the thermal compensation coefficient of the display unit is obtained from the control device of the display unit.
In one embodiment, the correction unit 203 is further configured to: obtaining a target correction coefficient according to the product of the thermal compensation coefficient and the cold screen correction coefficient; and correcting the display unit according to the target correction coefficient.
In one embodiment, the thermal compensation coefficient is determined by: c _ h ═ T × O _ h-1Wherein C _ h represents a thermal compensation coefficient, T represents target data of the first display unit, and O _ h represents the first display unitData when reaching a thermal equilibrium state after cold screen correction;
or C _ h ═ O _ C ═ O _ h-1Wherein C _ h represents a thermal compensation coefficient, O _ C represents data of the first display unit in a cold screen state, and O _ h represents data of the first display unit reaching a thermal equilibrium state without correcting the first display unit.
In one embodiment, after the second obtaining unit 202 obtains the thermal compensation coefficient of the display unit, the apparatus further includes: and preprocessing the thermal compensation coefficient by adopting a noise reduction algorithm or a smoothing algorithm to obtain a preprocessed thermal compensation coefficient.
In one embodiment, the display unit is a box body, and the sub-unit is a lamp panel; or the display unit is a bracket, and the sub-unit is a box body or a lamp panel; alternatively, the display unit is a thermal cycle unit.
Based on the same inventive concept, the embodiment of the present application further provides a thermal compensation correction device, where the thermal compensation correction device 300 may be a device such as a notebook computer, a palm computer, a PC, a tablet computer, and a mobile phone, may also be a device such as a robot, a desktop computer, and a server, and may also be another device capable of performing thermal compensation correction on a display unit. The thermal compensation correction device 300 is shown in fig. 3.
As shown in fig. 3, the thermal compensation correction apparatus 300 of this embodiment includes: a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and operable on the processor 301. The computer program 303 may be executed by the processor 301 to generate instructions, and the processor 301 may implement the steps in the embodiments of the authority authentication method according to the instructions. Alternatively, the processor 301 implements the functions of the modules/units in the above-described device embodiments when executing the computer program 303.
Illustratively, the computer program 303 may be divided into one or more modules/units, which are stored in the memory 302 and executed by the processor 301 to accomplish the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 303 in the thermal compensation correction device 300.
Those skilled in the art will appreciate that fig. 3 is merely an example of the thermal compensation correction device 300 and does not constitute a limitation of the thermal compensation correction device 300 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the thermal compensation correction device 300 may also include input-output devices, network access devices, buses, etc.
The Processor 301 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 302 may be an internal storage unit of the thermal compensation correction apparatus 300, such as a hard disk or a memory of the thermal compensation correction apparatus 300. The memory 302 may also be an external storage device of the thermal compensation correction device 300, such as a plug-in hard disk provided on the thermal compensation correction device 300, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 302 may also include both an internal storage unit of the thermal compensation correction device 300 and an external storage device. The memory 302 is used to store computer programs and other programs and data required by the thermal compensation correction device 300. The memory 302 may also be used to temporarily store data that has been output or is to be output.
The thermal compensation correction device provided by this embodiment may perform the above method embodiments, and the implementation principle and the technical effect thereof are similar, and are not described herein again.
Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the method of the above-mentioned method embodiments.
The embodiments of the present application further provide a computer program product, which when running on a thermal compensation correction apparatus, causes the thermal compensation correction apparatus to perform the method of the above method embodiments.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/thermal compensation correction device, a recording medium, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier signal, telecommunications signal, and software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc.
Reference throughout this application to "one embodiment" or "some embodiments," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In the description of the present application, it is to be understood that the terms "first", "second" 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" or "second" may explicitly or implicitly include at least one such feature.
In addition, in the present application, unless otherwise explicitly specified or limited, the terms "connected," "connected," and the like are to be construed broadly, e.g., as meaning both mechanically and electrically; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating between two elements or for interacting between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present application may be understood by those skilled in the art according to specific situations.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. A method for thermal compensation correction, applied to a display unit, wherein the display unit comprises a plurality of sub-units, and each sub-unit in the plurality of sub-units stores a cold screen correction coefficient, the method comprising:
acquiring a cold screen correction coefficient of each subunit, wherein the cold screen correction coefficient is determined according to initial data and target data of the subunits in a cold screen state, and the initial data comprises at least one of initial brightness, initial chromaticity and initial brightness;
acquiring a thermal compensation coefficient of the display unit, wherein the thermal compensation coefficient is obtained based on at least one of target data of a first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state, and the first display unit is the display unit or a sample display unit corresponding to the display unit;
and obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit, wherein the target correction coefficient is used for correcting the display unit.
2. The method of claim 1, wherein the cold screen correction factor is determined from initial data and target data of the subunit in a cold screen state, comprising: the cold screen correction coefficient is determined according to the initial data and the target data of the three primary colors of the subunit in the cold screen state;
and/or the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit when the first display unit reaches a thermal equilibrium state, and the thermal compensation coefficient comprises the following steps: the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and tricolor data of the first display unit in a cold screen state, and the tricolor data when the first display unit reaches a thermal equilibrium state.
3. The method of claim 1, wherein prior to obtaining the cold screen correction factor for each of the subunits, the method further comprises:
determining a cold screen correction coefficient of each subunit according to the initial data and the target data of each subunit in a cold screen state, and storing the cold screen correction coefficient into each subunit;
the obtaining of the cold screen correction coefficient of each subunit includes:
and respectively acquiring the cold screen correction coefficient of each subunit from each subunit.
4. The method of claim 1 or 3, wherein prior to obtaining the thermal compensation coefficient of the display unit, the method further comprises:
determining a thermal compensation coefficient of the display unit according to at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit in a thermal equilibrium state, and storing the thermal compensation coefficient into control equipment corresponding to the display unit;
the acquiring of the thermal compensation coefficient of the display unit includes:
and acquiring the thermal compensation coefficient of the display unit from the control device of the display unit.
5. The method according to claim 1, wherein the obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each sub-unit, the target correction coefficient being used for correcting the display unit comprises:
obtaining a target correction coefficient according to the product of the thermal compensation coefficient and the cold screen correction coefficient;
and correcting the display unit according to the target correction coefficient.
6. The method of claim 4, wherein the thermodynamic compensation coefficient is determined by: c _ h ═ T × O _ h-1Wherein, C _ h represents the thermal compensation coefficient, T represents the target data of the first display unit, and O _ h represents the data when the first display unit reaches a thermal equilibrium state after being subjected to cold screen correction;
or C _ h ═ O _ C ═ O _ h-1Wherein C _ h represents the thermal compensation coefficient, and O _ C representsAnd o _ h represents data when the first display unit reaches a thermal equilibrium state without correcting the first display unit.
7. The method of claim 4, wherein after obtaining the thermal compensation coefficient of the display unit, the method further comprises:
and preprocessing the thermal compensation coefficient by adopting a noise reduction algorithm or a smoothing algorithm to obtain a preprocessed thermal compensation coefficient.
8. The method of claim 1, wherein the display unit is a box and the sub-unit is a light panel;
or, the display unit is a bracket, and the sub-unit is a box body or a lamp panel;
alternatively, the display unit is a thermal cycle unit.
9. A thermal compensation correction device is applied to a display unit, the display unit comprises a plurality of sub-units, each sub-unit of the plurality of sub-units stores a cold screen correction coefficient, and the device comprises:
a first obtaining unit, configured to obtain a cold screen correction coefficient of each subunit, where the cold screen correction coefficient is determined according to initial data and target data of the subunit in a cold screen state, and the initial data includes at least one of initial luminance, initial chromaticity, and initial brightness;
the second obtaining unit is used for obtaining a thermal compensation coefficient of the display unit, wherein the thermal compensation coefficient is obtained based on at least one of target data of the first display unit and data of the first display unit in a cold screen state and data of the first display unit when the first display unit reaches a thermal equilibrium state, and the first display unit is the display unit or a sample display unit corresponding to the display unit;
and the correction unit is used for obtaining a target correction coefficient of the display unit according to the thermal compensation coefficient of the display unit and the cold screen correction coefficient of each subunit, and the target correction coefficient is used for correcting the display unit.
10. A thermal compensation correction apparatus, characterized in that the apparatus comprises: a processor and a memory for storing a computer program, the processor for invoking and running the computer program from the memory, causing the apparatus to perform the method of any one of claims 1 to 8.
11. A computer-readable storage medium, in which a computer program is stored which, when executed by a processor, causes the processor to carry out the method of any one of claims 1 to 8.
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