Display screen temperature compensation method and system

Abstract

The invention discloses a display screen temperature compensation method and system, and relates to the field of temperature compensation, and the method comprises the steps: calculating a difference value between an initial temperature and a current temperature of a target display screen, and obtaining a target temperature difference; determining a Gamma data difference of the target display screen according to the target temperature difference and a Gamma model; compensating Gamma data stored in a register in the target display screen according to the Gamma data difference of the target display screen to obtain compensated Gamma data of the target display screen; the Gamma model is obtained by fitting experimental data; the experimental data comprises a Gamma data difference of the experimental display screen; the Gamma data difference of the experiment display screen comprises the difference value between the calibrated Gamma data stored in a register in the experiment display screen at different temperatures and the calibrated Gamma data at the initial temperature, the brightness compensation of the display screen at different temperatures can be realized, the optical display effect is improved, and the power consumption of the product is reduced.

Description

Technical Field

[0001] The present application relates to the field of temperature compensation, and in particular to a display screen temperature compensation method and system. Background Art

[0002] When the micro display screen is used in a low or high temperature environment, the brightness and color will change greatly, affecting the user experience. The related temperature compensation solution is that the IC (Integrated Circuit) of the micro display screen has a built-in temperature compensation function, which can improve the brightness by dynamically adjusting the Vcom voltage. However, this method usually affects the optical effect of the product, such as color deviation, and also increases the power consumption of the product. Summary of the invention

[0003] The purpose of this application is to provide a display screen temperature compensation method and system, which can realize the brightness compensation of the display screen at different temperatures, improve the optical display effect, and reduce the power consumption of the product.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a display screen temperature compensation method, comprising:

[0006] Get the temperature of the target display screen in the current environment and get the current temperature;

[0007] Calculating the difference between the initial temperature of the target display screen and the current temperature to obtain a target temperature difference;

[0008] Determining the Gamma data difference of the target display screen according to the target temperature difference and the Gamma model;

[0009] Compensating the Gamma data stored in the register of the target display screen according to the Gamma data difference of the target display screen to obtain compensated Gamma data of the target display screen;

[0010] Among them, the Gamma model is obtained by fitting experimental data; the experimental data includes: the Gamma data difference of the experimental display screen; the Gamma data difference of the experimental display screen includes: the difference between the Gamma data calibrated at different temperatures stored in the register of the experimental display screen and the Gamma data calibrated at the initial temperature; the calibrated Gamma data is obtained by Gamma calibration of the Gamma data stored in the register of the experimental display screen.

[0011] Optionally, the Gamma data includes: RGB values; the RGB values ​​are used to characterize the brightness and chromaticity of a display screen.

[0012] Optionally, the method for determining the Gamma model specifically includes:

[0013] Gamma calibration is performed on the Gamma data stored in the register of the experimental display screen at the initial temperature to obtain the Gamma data of the experimental display screen after calibration at the initial temperature;

[0014] At each set time interval starting from the initial temperature, the Gamma data stored in the register of the experimental display screen is calibrated once to obtain the calibrated Gamma data at different time intervals stored in the register of the experimental display screen; different time intervals correspond to different temperature differences;

[0015] Calculate the difference between the calibrated Gamma data at each time interval and the calibrated Gamma data at the initial temperature to obtain multiple sets of Gamma data differences for the experimental display screen;

[0016] The Gamma model is obtained by fitting the Gamma data differences of different time intervals and corresponding groups.

[0017] Optionally, the experimental display screen includes multiple blocks; each group of Gamma data differences is an average value of Gamma data differences of the multiple experimental display screens in the time interval.

[0018] Optionally, performing gamma calibration on the gamma data stored in the register of the experimental display screen at the initial temperature to obtain the gamma data of the experimental display screen after calibration at the initial temperature, specifically includes:

[0019] Obtain the brightness and chromaticity of the experimental display screen when it is illuminated at the initial temperature;

[0020] According to the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature, the gamma data stored in the register of the experimental display screen is gamma calibrated to obtain the gamma data of the experimental display screen after calibration at the initial temperature.

[0021] Optionally, according to the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature, gamma calibration is performed on the gamma data stored in the register of the experimental display screen to obtain the gamma data of the experimental display screen after calibration at the initial temperature, specifically including:

[0022] The brightness of the experimental display screen when it is lit at the initial temperature is compared with the set brightness value, and the chromaticity of the experimental display screen when it is lit at the initial temperature is compared with the set chromaticity value. According to the comparison result, the Gamma data stored in the register of the experimental display screen is Gamma calibrated to obtain the Gamma data of the experimental display screen after calibration at the initial temperature.

[0023] Optionally, the brightness and chromaticity of the experimental display screen when it is illuminated at the initial temperature are obtained, specifically including:

[0024] The experimental display screen is lit up at the initial temperature using a pattern generator;

[0025] An optical probe is used to collect the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature.

[0026] Optionally, obtaining the temperature of the target display screen in the current environment to obtain the current temperature includes:

[0027] The temperature sensor in the target display screen is used to collect the temperature in the current environment to obtain the current temperature.

[0028] In a second aspect, the present application provides a display screen temperature compensation system, comprising:

[0029] The acquisition module is used to obtain the temperature of the target display screen in the current environment and obtain the current temperature;

[0030] A temperature difference calculation module, used to calculate the difference between the initial temperature of the target display screen and the current temperature to obtain a target temperature difference;

[0031] A gamma data difference determination module, used to determine the gamma data difference of the target display screen according to the target temperature difference and the gamma model;

[0032] A temperature compensation module, used for compensating the Gamma data stored in the register of the target display screen according to the Gamma data difference of the target display screen, so as to obtain the compensated Gamma data of the target display screen;

[0033] Among them, the Gamma model is obtained by fitting experimental data; the experimental data includes: the Gamma data difference of the experimental display screen; the Gamma data difference of the experimental display screen includes: the difference between the Gamma data calibrated at different temperatures stored in the register of the experimental display screen and the Gamma data calibrated at the initial temperature; the calibrated Gamma data is obtained by Gamma calibration of the Gamma data stored in the register of the experimental display screen.

[0034] Optionally, the display screen temperature compensation system further includes: a model building module, used to determine the Gamma model;

[0035] The model building module specifically includes:

[0036] An initial calibration unit, used to perform Gamma calibration on the Gamma data stored in the register of the experimental display screen at an initial temperature, so as to obtain the Gamma data of the experimental display screen after calibration at the initial temperature;

[0037] The different temperature difference calibration unit is used to perform a Gamma calibration on the Gamma data stored in the register of the experimental display screen at each set time interval starting from the initial temperature, and obtain the calibrated Gamma data at different time intervals stored in the register of the experimental display screen; different time intervals correspond to different temperature differences;

[0038] A gamma data difference calculation unit is used to calculate the difference between the calibrated gamma data at each time interval and the calibrated gamma data at the initial temperature, and obtain multiple groups of gamma data differences of the experimental display screen;

[0039] The data fitting unit is used to fit the Gamma data differences of different time intervals and corresponding groups to obtain the Gamma model.

[0040] According to the specific embodiments provided in this application, this application has the following technical effects:

[0041] The present application provides a display screen temperature compensation method and system, which obtains a Gamma model by fitting the difference between the Gamma data calibrated at different temperatures and the Gamma data calibrated at the initial temperature stored in the register of the experimental display screen, and determines the Gamma data difference of the target display screen according to the target temperature difference and the Gamma model, thereby using the Gamma data difference of the target display screen to compensate the Gamma data stored in the register of the target display screen, and the compensated Gamma data can realize the compensation of the brightness of the display screen. The present application can realize the brightness compensation of the display screen at different temperatures without dynamically adjusting the Vcom voltage, which can improve the optical display effect and reduce the power consumption of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic diagram of a flow chart of a display screen temperature compensation method provided in one embodiment of the present application;

[0044] Figure 2 A schematic diagram of a Gamma model provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of a circuit for dynamically adjusting the Vcom voltage provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of functional modules of a display screen temperature compensation system provided in another embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0049] In order to realize automatic compensation of the brightness of the display screen in high and low temperature environments, improve the optical display effect (such as color cast), and reduce product power consumption, the present application considers a solution for automatic Gamma compensation of the display screen in low or high temperature environments, utilizes the temperature compensation function of the driver IC in the display screen, and realizes automatic Gamma compensation by real-time monitoring of ambient temperature changes, thereby improving the optical display effect and reducing product power consumption.

[0050] See also Figure 1 , the present application provides a display screen temperature compensation method, comprising:

[0051] Step 101, obtaining the temperature of the target display screen in the current environment to obtain the current temperature.

[0052] Wherein, the target display screen may be a micro display screen.

[0053] Step 102, calculating the difference between the initial temperature of the target display screen and the current temperature to obtain a target temperature difference.

[0054] Step 103: Determine the Gamma data difference of the target display screen according to the target temperature difference and the Gamma model.

[0055] Step 104 , compensating the Gamma data stored in the register of the target display screen according to the Gamma data difference of the target display screen, to obtain compensated Gamma data of the target display screen.

[0056] Among them, the Gamma model is obtained by fitting experimental data; the experimental data includes: the Gamma data difference of the experimental display screen; the Gamma data difference of the experimental display screen includes: the difference between the Gamma data calibrated at different temperatures stored in the register of the experimental display screen and the Gamma data calibrated at the initial temperature; the calibrated Gamma data is obtained by Gamma calibration of the Gamma data stored in the register of the experimental display screen.

[0057] The Gamma data includes: RGB values; the RGB values ​​are used to characterize the brightness and chromaticity of the display screen.

[0058] In another exemplary embodiment of the present application, the method for determining the Gamma model in step 103 specifically includes:

[0059] (1) Gamma calibration is performed on the Gamma data stored in the register of the experimental display screen at the initial temperature t0 to obtain the Gamma data of the experimental display screen after calibration at the initial temperature. The experimental display screen may be a micro display screen. This step specifically includes:

[0060] The brightness and chromaticity of the experimental display screen when it is lit at the initial temperature are obtained. Specifically, a pattern generator (PG) is used to light up the experimental display screen at the initial temperature; and an optical probe is used to collect the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature.

[0061] According to the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature, the Gamma data stored in the register of the experimental display screen is Gamma calibrated to obtain the Gamma data of the experimental display screen after calibration at the initial temperature. The process of Gamma calibration is: comparing the brightness of the experimental display screen when it is lit at the initial temperature with the set brightness value, comparing the chromaticity of the experimental display screen when it is lit at the initial temperature with the set chromaticity value, and performing Gamma calibration on the Gamma data stored in the register of the experimental display screen according to the comparison result to obtain the Gamma data of the experimental display screen after calibration at the initial temperature.

[0062] (2) Starting from the initial temperature, at each set time period Δt, the gamma data stored in the register of the experimental display screen is calibrated once to obtain the calibrated gamma data at different time intervals (t0, t1, t2, ..., tn) stored in the register of the experimental display screen; different time intervals correspond to different temperature differences. t0 represents the temperature (i.e., the initial temperature) that is 0 set time periods (no time interval) apart from the initial temperature; t1 represents the temperature that is 1 set time period apart from the initial temperature; t2 represents the temperature that is 2 set time periods apart from the initial temperature; tn represents the temperature that is n set time periods apart from the initial temperature.

[0063] (4) Calculate the difference between the calibrated Gamma data at each time interval and the calibrated Gamma data at the initial temperature, and obtain multiple sets of Gamma data differences (ΔGamma 0, ΔGamma 1, ΔGamma 2, ..., ΔGamma n) of the experimental display screen. When the time period set by the interval is 0, that is, at the initial temperature, the corresponding Gamma data difference ΔGamma 0 obtained at this time is the difference between the Gamma data calibrated at the initial temperature and the Gamma data stored in the register at the initial temperature.

[0064] (5) Fitting is performed with different time intervals and the Gamma data differences of the corresponding groups to obtain the Gamma model. Figure 2 shown.

[0065] In another exemplary embodiment of the present application, the experimental display screen includes multiple blocks; each group of Gamma data differences is an average value of the Gamma data differences of the multiple experimental display screens in the time interval.

[0066] In this embodiment, the display screen is subjected to a Gamma calibration once for each temperature interval Δt; the difference ΔGamma between the Gamma data is calculated; the above two steps are repeated to collect a large amount of data, and the data is averaged to obtain the Gamma model, thereby further ensuring the accuracy of the Gamma model.

[0067] In another exemplary embodiment of the present application, step 101 specifically includes: using a temperature sensor in the target display screen to collect the temperature in the current environment to obtain the current temperature.

[0068] Taking a micro display screen as an example, the process of the above display screen temperature compensation method in practical applications is further described in detail.

[0069] Step 1: Randomly select a micro display screen, light it up with PG at the initial temperature t0, and use an optical probe to perform Gamma calibration on it. The calibrated Gamma data is shown in Table 1.

[0070] Table 1 Gamma data after calibration at initial temperature

[0071]

[0072] Step 2: Change the temperature, perform a Gamma calibration at every interval of Δt, denoted as t1, and obtain the calibrated Gamma data at different temperatures. The Gamma data after calibration at temperature t1, which is separated from the initial temperature by a set time period Δt, is shown in Table 2.

[0073] Table 2 Gamma data after calibration at temperature t1

[0074]

[0075] Step 3: Calculate the register difference between t0 and t1, that is, the Gamma data difference ΔGamma 1, as shown in Table 3.

[0076] Table 3 Gamma data difference ΔGamma 1

[0077]

[0078] Step 4: Repeat steps 1 to 3 to obtain multiple sets of data in step 3.

[0079] Step 5: Randomly select multiple microdisplays and repeat steps 1 to 4, average all the data and establish a Gamma model.

[0080] Step 6: In actual use, since the microdisplay has its own temperature sensor, it can obtain the current ambient temperature. Then, based on the difference between the current temperature and the initial temperature, the corresponding register difference is retrieved from the model to compensate for the Gamma data and update the display.

[0081] The advantages of the display screen temperature compensation method of the present application are explained below by comparing it with a method of dynamically adjusting the Vcom voltage.

[0082] Dynamically adjust Vcom voltage based on Figure 3 This method uses the temperature sensor on the chip to obtain the current operating temperature of the display screen, and then converts it into the corresponding Vcom voltage through a formula. However, the display effect often deteriorates due to the screen manufacturing process, and both Gamma and chromaticity deviate from the target value. The change in Vcom voltage will also cause the power consumption of the micro display screen to increase abnormally.

[0083] The present application establishes a database model (i.e., a Gamma model) in which Gamma changes with temperature t, and keeps the Vcom voltage unchanged, so that the brightness and chromaticity of the display screen will not deviate from the target value, and will not cause an abnormal increase in power consumption.

[0084] Based on the same inventive concept, the embodiment of the present application also provides a display screen temperature compensation system for implementing the display screen temperature compensation method involved above. The implementation scheme for solving the problem provided by the system is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more display screen temperature compensation system embodiments provided below can refer to the limitations of the display screen temperature compensation method above, and will not be repeated here.

[0085] In an exemplary embodiment, Figure 4 As shown, a display screen temperature compensation system is provided, comprising:

[0086] The acquisition module 401 is used to acquire the temperature of the target display screen in the current environment to obtain the current temperature.

[0087] The temperature difference calculation module 402 is used to calculate the difference between the initial temperature of the target display screen and the current temperature to obtain a target temperature difference.

[0088] The Gamma data difference determination module 403 is used to determine the Gamma data difference of the target display screen according to the target temperature difference and the Gamma model.

[0089] The temperature compensation module 404 is used to compensate the Gamma data stored in the register of the target display screen according to the Gamma data difference of the target display screen to obtain the compensated Gamma data of the target display screen.

[0090] Among them, the Gamma model is obtained by fitting experimental data; the experimental data includes: the Gamma data difference of the experimental display screen; the Gamma data difference of the experimental display screen includes: the difference between the Gamma data calibrated at different temperatures stored in the register of the experimental display screen and the Gamma data calibrated at the initial temperature; the calibrated Gamma data is obtained by Gamma calibration of the Gamma data stored in the register of the experimental display screen.

[0091] As an optional implementation, the display screen temperature compensation system further includes: a model building module, which is used to determine the Gamma model. The model building module specifically includes:

[0092] The initial calibration unit is used to perform Gamma calibration on the Gamma data stored in the register of the experimental display screen at the initial temperature to obtain the Gamma data of the experimental display screen after calibration at the initial temperature.

[0093] The different temperature difference calibration units are used to perform a Gamma calibration on the Gamma data stored in the register of the experimental display screen at each set time interval starting from the initial temperature, so as to obtain the calibrated Gamma data at different time intervals stored in the register of the experimental display screen; different time intervals correspond to different temperature differences.

[0094] The gamma data difference calculation unit is used to calculate the difference between the calibrated gamma data at each time interval and the calibrated gamma data at the initial temperature, and obtain multiple groups of gamma data differences of the experimental display screen.

[0095] The data fitting unit is used to fit the Gamma data differences of different time intervals and corresponding groups to obtain the Gamma model.

[0096] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A display screen temperature compensation method, characterized in that: The display screen temperature compensation method comprises: Get the temperature of the target display screen in the current environment and get the current temperature; Calculating the difference between the initial temperature of the target display screen and the current temperature to obtain a target temperature difference; Determining the Gamma data difference of the target display screen according to the target temperature difference and the Gamma model; Compensating the Gamma data stored in the register of the target display screen according to the Gamma data difference of the target display screen to obtain compensated Gamma data of the target display screen; Among them, the Gamma model is obtained by fitting experimental data; the experimental data includes: the Gamma data difference of the experimental display screen; the Gamma data difference of the experimental display screen includes: the difference between the Gamma data calibrated at different temperatures stored in the register of the experimental display screen and the Gamma data calibrated at the initial temperature; the calibrated Gamma data is obtained by Gamma calibration of the Gamma data stored in the register of the experimental display screen.

2. The display screen temperature compensation method according to claim 1, characterized in that: The Gamma data includes: RGB values; the RGB values ​​are used to characterize the brightness and chromaticity of the display screen.

3. The display screen temperature compensation method according to claim 1, characterized in that: The method for determining the Gamma model specifically includes: Gamma calibration is performed on the Gamma data stored in the register of the experimental display screen at the initial temperature to obtain the Gamma data of the experimental display screen after calibration at the initial temperature; At each set time interval starting from the initial temperature, the Gamma data stored in the register of the experimental display screen is calibrated once to obtain the calibrated Gamma data at different time intervals stored in the register of the experimental display screen; different time intervals correspond to different temperature differences; Calculate the difference between the calibrated Gamma data at each time interval and the calibrated Gamma data at the initial temperature to obtain multiple sets of Gamma data differences for the experimental display screen; The Gamma model is obtained by fitting the Gamma data differences of different time intervals and corresponding groups.

4. The display screen temperature compensation method according to claim 3, characterized in that: The experimental display screen includes multiple blocks; each group of Gamma data differences is an average value of the Gamma data differences of the multiple experimental display screens in the time interval.

5. The display screen temperature compensation method according to claim 3, characterized in that: Gamma calibration is performed on the Gamma data stored in the register of the experimental display screen at the initial temperature to obtain the Gamma data of the experimental display screen after calibration at the initial temperature, specifically including: Obtain the brightness and chromaticity of the experimental display screen when it is illuminated at the initial temperature; According to the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature, the gamma data stored in the register of the experimental display screen is gamma calibrated to obtain the gamma data of the experimental display screen after calibration at the initial temperature.

6. The display screen temperature compensation method according to claim 5, characterized in that: According to the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature, the Gamma data stored in the register of the experimental display screen is Gamma calibrated to obtain the Gamma data of the experimental display screen after calibration at the initial temperature, specifically including: The brightness of the experimental display screen when it is lit at the initial temperature is compared with the set brightness value, and the chromaticity of the experimental display screen when it is lit at the initial temperature is compared with the set chromaticity value. According to the comparison result, the Gamma data stored in the register of the experimental display screen is Gamma calibrated to obtain the Gamma data of the experimental display screen after calibration at the initial temperature.

7. The display screen temperature compensation method according to claim 5, characterized in that: Obtain the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature, including: The experimental display screen is lit up at the initial temperature using a pattern generator; An optical probe is used to collect the brightness and chromaticity of the experimental display screen when it is lit at the initial temperature.

8. The display screen temperature compensation method according to claim 1, characterized in that: Get the temperature of the target display in the current environment and get the current temperature, including: The temperature sensor in the target display screen is used to collect the temperature in the current environment to obtain the current temperature.

9. A display screen temperature compensation system, characterized in that: The display screen temperature compensation system comprises: The acquisition module is used to obtain the temperature of the target display screen in the current environment and obtain the current temperature; A temperature difference calculation module, used to calculate the difference between the initial temperature of the target display screen and the current temperature to obtain a target temperature difference; A gamma data difference determination module, used to determine the gamma data difference of the target display screen according to the target temperature difference and the gamma model; A temperature compensation module, used for compensating the Gamma data stored in the register of the target display screen according to the Gamma data difference of the target display screen, so as to obtain the compensated Gamma data of the target display screen; Among them, the Gamma model is obtained by fitting experimental data; the experimental data includes: the Gamma data difference of the experimental display screen; the Gamma data difference of the experimental display screen includes: the difference between the Gamma data calibrated at different temperatures stored in the register of the experimental display screen and the Gamma data calibrated at the initial temperature; the calibrated Gamma data is obtained by Gamma calibration of the Gamma data stored in the register of the experimental display screen.

10. The display screen temperature compensation system according to claim 9, characterized in that: The display screen temperature compensation system further includes: a model building module, used to determine the Gamma model; The model building module specifically includes: An initial calibration unit, used to perform Gamma calibration on the Gamma data stored in the register of the experimental display screen at the initial temperature, so as to obtain the Gamma data of the experimental display screen after calibration at the initial temperature; The different temperature difference calibration unit is used to perform a Gamma calibration on the Gamma data stored in the register of the experimental display screen at each set time interval starting from the initial temperature, and obtain the calibrated Gamma data at different time intervals stored in the register of the experimental display screen; different time intervals correspond to different temperature differences; A gamma data difference calculation unit is used to calculate the difference between the calibrated gamma data at each time interval and the calibrated gamma data at the initial temperature, and obtain multiple groups of gamma data differences of the experimental display screen; The data fitting unit is used to fit the Gamma data differences of different time intervals and corresponding groups to obtain the Gamma model.

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