Electronic product display screen color correction method and device

Abstract

The invention relates to the technical field of screen color correction, in particular to an electronic product display screen color correction method and device. The method comprises the following steps: acquiring chromaticity coordinate information of a picture displayed by a display screen; a corrected sequential control code is obtained through calculation according to the chromaticity coordinate information; and burning the corrected sequential control code to a control panel of the display screen, so that the control panel controls the liquid crystal rotation angle of the display screen. According to the technical scheme, color correction is carried out under the complete machine form of the electronic product, in the correction process, the corrected sequential control code is burnt into the control panel of the display screen in a burning mode, hardware correction is achieved, the correction method is higher in precision, and E can be controlled to be smaller than or equal to 1.0.

Description

Technical Field

[0001] The present invention relates to the technical field of screen color correction, and in particular to a method and device for color correction of an electronic product display screen. Background Art

[0002] The ΔE value is a comprehensive value that represents color difference, which reflects the difference between the display and the standard color. In the display industry, the ΔE value is used to quantify the accuracy of the display's color representation. Specifically, the ΔE value is a value obtained by calculating the difference between the color displayed by the display and the standard color. The calculation formula includes calculating the difference between the Lab data of the sample and the Lab data of the reference sample, and then adding these difference values ​​and taking the square root.

[0003] When evaluating the color reproduction accuracy of a display, the ΔE value is an important reference indicator. Generally speaking, the smaller the ΔE value, the closer the color displayed by the display is to the standard color, and the more accurate the color reproduction is. For example, if the ΔE value is less than 2, it is generally considered to have excellent color reproduction performance. Such a display can accurately restore the color of the original image, making the image look more real and natural.

[0004] In existing electronic products, the calibration of display screens / monitors can be performed through a separate color calibration process, that is, the color calibration process is performed after the display screen / monitor is produced. In this way, when the display screen / monitor is assembled, the △E value may be offset, thereby affecting the image color of the display screen / monitor. Alternatively, a colorimeter can be used to calibrate the entire machine. When a colorimeter is used for color calibration, the supporting software part is required, and the calibration accuracy can only meet △E=2.0, and cannot achieve the industry-leading level of ≤1.0. Summary of the invention

[0005] In order to solve at least the above technical problems existing in the prior art, the present invention provides a method and device for color correction of an electronic product display screen.

[0006] On one hand, the present invention provides a method for color correction of an electronic product display screen. When the electronic product is running, the method comprises: obtaining chromaticity coordinate information of a picture displayed on the display screen; calculating a correction timing control code according to the chromaticity coordinate information; and burning the correction timing control code to a control board of the display screen so that the control board can control the liquid crystal rotation angle of the display screen.

[0007] In some embodiments, the method for obtaining the chromaticity coordinate information of the picture displayed on the display screen includes: when the electronic product is in operation, the display screen displays pictures of different colors, and obtaining the chromaticity coordinate information of multiple display pictures.

[0008] In some embodiments, the method for obtaining the chromaticity coordinate information of the picture displayed on the display screen further includes: obtaining the chromaticity coordinate information of multiple center points of the display picture.

[0009] In some embodiments, the method of calculating and obtaining the corrected timing control code according to the chromaticity coordinate information includes: calculating an average chromaticity deviation value according to a plurality of the chromaticity coordinate information, and calculating and obtaining the corrected timing control code according to the average chromaticity deviation value.

[0010] In some embodiments, the method of burning the corrected timing control code into the control board of the display screen includes: transmitting the corrected timing control code to the electronic product via wireless communication, and burning it to the control board of the display screen via an I2C port or an AUX port.

[0011] On the other hand, the present invention also provides a color correction device for an electronic product display screen, which is used for color correction when the electronic product is in operation, and includes: an acquisition module, which is configured to acquire chromaticity coordinate information of a picture displayed on the display screen; a calculation module, which is configured to calculate a corrected timing control code based on the chromaticity coordinate information; and a burning module, which is configured to burn the corrected timing control code to a control board of the display screen so that the control board can control the liquid crystal rotation angle of the display screen.

[0012] In some embodiments, when the electronic product is in operation, the display screen displays display images of different colors; the acquisition module is further configured to acquire the chromaticity coordinate information of a plurality of the display images.

[0013] In some embodiments, the acquisition module is further configured to acquire the chromaticity coordinate information of a plurality of center points of the display screens.

[0014] In some embodiments, the calculation module is further configured to calculate an average chromaticity deviation value according to the plurality of chromaticity coordinate information, and obtain a corrected timing control code according to the average chromaticity deviation value.

[0015] In some embodiments, it also includes a wireless communication module, which is configured to transmit the corrected timing control code to the electronic product via wireless communication; the burning module is also configured to burn to the control board of the display screen via an I2C port or an AUX port.

[0016] The present invention provides a method and device for color correction of an electronic product display screen. When performing correction, the electronic product is running as a whole, and the chromaticity coordinate information of the picture displayed on the current display screen is obtained. The corrected timing control code can be calculated through the chromaticity coordinate information, and the corrected timing control code is burned into the control board of the display screen. The control board selects the corresponding control logic (i.e., the corresponding gamma voltage) according to the corrected timing control code. The voltage difference between different gamma voltages and the reference (Vcom) voltage causes different liquid crystal rotation angles, and the light emitted by the backlight changes, thereby adjusting the color effect of the display screen. The technical solution of the present invention performs color correction in the form of an electronic product as a whole, and during the correction process, the corrected timing control code is burned into the control board of the display screen by burning, so as to realize hardware correction. The accuracy of this correction method is higher and can be controlled within △E≤1.0. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0018] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0019] Figure 1 The process of the color correction method of the electronic product display screen provided by the embodiment of the present invention Figure 1 ;

[0020] Figure 2 The process of the color correction method of the electronic product display screen provided by the embodiment of the present invention Figure 2 ;

[0021] Figure 3 A block diagram of a color correction device for an electronic product display screen provided by an embodiment of the present invention.

[0022] In the figure:

[0023] 110: acquisition module; 120: calculation module; 130: burning module; 140: wireless communication module; 150: storage module. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] In the embodiment of the present invention, the color calibration of the display screen is performed when the electronic product is in the complete state, that is, the display screen and various system components have been assembled. For the color calibration in the complete state, the display screen does not need to be color calibrated before assembly, thereby avoiding the problem of ΔE value deviation after the display screen is assembled.

[0026] Compared with the existing whole-machine color correction, the electronic product display screen color correction method and device disclosed in the embodiment of the present invention adopts a burning method for correction, that is, a hardware correction method for correction, thereby achieving more accurate color correction. Compared with the existing software correction method, the △E value can be controlled below 2.0, generally: △E≤1.0, thereby making the color reproduction of the display screen higher.

[0027] like Figure 1 and Figure 2 As shown, in the embodiment of the present invention, when the electronic product is in operation, the display screen is lit, and a display screen of a set color is displayed. The display screen is used as reference information to calibrate the color of the display screen of the whole device. In the embodiment of the present invention, the color correction method of the electronic product display screen includes the following steps:

[0028] Step S10: Acquire the chromaticity coordinate information of the picture displayed on the display screen. The display screen displays a set display picture, and the chromaticity coordinate information of the display picture is acquired through an image acquisition device. For example, the image acquisition device includes an optical probe, and the chromaticity coordinate information of the display picture is acquired by using the optical probe. For example, the optical probe emits light at a specified position of the display picture, and by measuring the intensity of the light in different wavelength ranges, the color coordinate value of the display picture can be calculated, and the chromaticity coordinates can be determined.

[0029] For example, when determining the chromaticity coordinates, the chromaticity coordinates of the center point of the display screen are collected by the image acquisition device. For example, the image acquisition device is fixed in front of the display screen using a fixed structure, and the relative position of the fixing device and the display screen is fixed to ensure the correctness of the acquisition position. Each time the image is collected, the image is collected at the same position.

[0030] In the embodiment of the present invention, the acquisition position of the display screen is not limited to this, and other acquisition positions can be selected according to the settings by adjusting the position of the image acquisition device. Or, for example, on the same display screen, chromaticity coordinate information of multiple positions can be collected simultaneously.

[0031] In step S10, when the electronic product is in operation, the display screen displays pictures of different colors, so that the chromaticity coordinate information of multiple display pictures can be obtained. Multiple display pictures are preset, and each display picture has a different color. Based on the chromaticity coordinate information of the multiple display pictures, multiple chromaticity deviation values ​​can be obtained, and then the average chromaticity deviation value can be calculated to improve the accuracy of the correction.

[0032] For example, 36 display images are preset in the electronic product. When collecting, they are played at a certain frequency, and the image acquisition device is used to collect the chromaticity coordinate information of the set position of each display image one by one. That is, 36 chromaticity deviation values ​​can be obtained, and the average chromaticity deviation value can be calculated and determined based on the 36 chromaticity deviation values.

[0033] Step S20: Calculate and obtain the corrected timing control code according to the chromaticity coordinate information; specifically: the chromaticity deviation value can be calculated according to the chromaticity coordinate information, for example, the calculation method of the chromaticity deviation value can adopt the CIELAB color difference calculation formula, the CMC color difference calculation formula, the CIE94 color difference calculation formula, etc. In the embodiment of the present invention, the calculation method / calculation formula of the chromaticity deviation value is not limited.

[0034] Among them, different chromaticity deviation values ​​include a corresponding corrected timing control code, that is, after obtaining the chromaticity deviation value, the corrected timing control code can be determined. The corrected timing control code is the burning value that needs to be burned. The entire electronic product runs the display screen with the new burning value, and the data of the display screen is corrected, which can realize new color display, thereby achieving the purpose of correction.

[0035] For example, in step S10, the chromaticity coordinate information of multiple display images needs to be obtained, and correspondingly in step 20, the average chromaticity deviation value needs to be calculated by adding multiple chromaticity deviation values ​​and then calculating the average chromaticity deviation value. By calculating the average chromaticity deviation value obtained, the corrected timing control code can be confirmed more accurately.

[0036] For example, the information of the timing control code is stored in the storage module 150, and after the average chromaticity deviation value is determined, the corresponding timing control code is read to determine that the timing control code is a corrected timing control code.

[0037] Step S30: Burning the corrected timing control code into the control board of the display screen, so that the control board can control the liquid crystal rotation angle of the display screen.

[0038] Similarly, the control board confirms the driving voltage of the display screen according to the corrected timing control code. After the electronic product is assembled, it is controlled by a timing control code in the original running state. When the corrected timing control code is re-burned, the GAMMA voltage corresponding to the new timing control code is different. The control board controls the liquid crystal rotation angle of the display screen according to the new GAMMA voltage and its reference voltage, thereby adjusting the brightness of the display screen. The brightness is different from the original brightness, thereby achieving the purpose of color correction of the display screen.

[0039] Among them, different timing control codes correspond to different GAMMA voltages, and the corresponding logic is also pre-set, that is, the control board can determine the GAMMA voltage according to the latest timing control code. Therefore, the purpose of color correction can be achieved by burning the corrected timing control code into the control board.

[0040] In the actual example of the present invention, after the corrected timing control code is determined, the corrected timing control code can be transmitted to the electronic product through wireless communication, and burned to the control board of the display screen through the I2C port or the AUX port. In the embodiment of the present invention, the burning method is not limited to this, and the burning operation can also be performed through other ports.

[0041] like Figure 3 As shown, an embodiment of the present invention further provides a color correction device for an electronic product display screen, which is used for color correction when the electronic product is in operation, and includes: an acquisition module 110, the acquisition module 110 is configured to acquire chromaticity coordinate information of a picture displayed on the display screen; a calculation module 120, the calculation module 120 is configured to calculate a corrected timing control code based on the chromaticity coordinate information; and a burning module 130, the burning module 130 is configured to burn the corrected timing control code to a control board of the display screen, so that the control board can control the liquid crystal rotation angle of the display screen.

[0042] In some embodiments, when the electronic product is in operation, the display screen displays images of different colors; the acquisition module 110 is further configured to acquire chromaticity coordinate information of multiple display images.

[0043] In some embodiments, the acquisition module 110 is further configured to acquire chromaticity coordinate information of the center points of multiple display images.

[0044] In some embodiments, the calculation module 120 is further configured to calculate an average chromaticity deviation value according to a plurality of chromaticity coordinate information, and obtain a corrected timing control code according to the calculated average chromaticity deviation value.

[0045] In some embodiments, a wireless communication module 140 is also included, and the wireless communication module 140 is configured to transmit the corrected timing control code to the electronic product through wireless communication; the burning module 130 is also configured to burn to the control board of the display screen through the I2C port or the AUX port.

[0046] It should be noted that the description of the electronic product display screen color correction device in the embodiment of the present disclosure is similar to the description of the electronic product display screen color correction method embodiment, and has similar beneficial effects as the method embodiment, so it is not repeated here. Figure 1 and Figure 2 understand from the explanation of the diagram.

[0047] The following describes the color calibration operation of a notebook computer display screen as an example, in combination with the method and device of the embodiment of the present invention. The test is performed in the notebook computer in an intact state.

[0048] First, the whole machine to be tested is placed in the device to be tested. For example, the image acquisition device, the conveying device, etc. are integrated into a device to be tested, and the automated production line operation can be completed in the device to be tested. After arriving at the test position, the screen of the whole machine to be tested displays a QR code, and the QR code is captured by the scanning capture system and the test program is started. After scanning the code, the current whole machine to be tested can be bound to achieve test tracking.

[0049] The device to be tested plays 36 display images of different colors, uses the image acquisition device to collect the (X, Y) chromaticity coordinates of the 36 images, calculates the chromaticity deviation value based on the (X, Y) chromaticity coordinates, and finally obtains the average chromaticity deviation value. Based on the average chromaticity deviation value, the burned value is determined and uploaded to the server.

[0050] The server communicates with the whole machine under test through WIFI, and writes the burned value into the control board of the display screen through the I2C or AUX port, so as to complete the hardware calibration of the whole machine under test. When the whole machine under test is running, the calibrated GAMMA voltage and its reference voltage are used to control the LCD rotation angle of the display screen, so as to adjust the brightness of the display screen and achieve the purpose of color calibration of the display screen.

[0051] The present invention provides a method and device for color correction of an electronic product display screen. When performing correction, the electronic product is running as a whole, and the chromaticity coordinate information of the picture displayed on the current display screen is obtained. The corrected timing control code can be calculated through the chromaticity coordinate information, and the corrected timing control code is burned into the control board of the display screen. The control board selects the corresponding control logic (i.e., the corresponding gamma voltage) according to the corrected timing control code. The voltage difference between different gamma voltages and the reference (Vcom) voltage causes different liquid crystal rotation angles, and the light emitted by the backlight changes, thereby adjusting the color effect of the display screen. The technical solution of the present invention performs color correction in the form of an electronic product as a whole, and during the correction process, the corrected timing control code is burned into the control board of the display screen by burning, so as to realize hardware correction. The accuracy of this correction method is higher and can be controlled within △E≤1.0.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A color correction method for an electronic product display screen, characterized in that: The electronic product is operated as a whole, and the method comprises: Obtain the chromaticity coordinate information of the picture displayed on the display screen; Calculate and obtain a corrected timing control code according to the chromaticity coordinate information; The corrected timing control code is burned into the control board of the display screen so that the control board can control the liquid crystal rotation angle of the display screen.

2. The electronic product display screen color correction method according to claim 1, characterized in that: The method for obtaining the chromaticity coordinate information of the picture displayed by the display screen comprises: When the electronic product is in operation, the display screen displays display images of different colors, and the chromaticity coordinate information of the multiple display images is obtained.

3. The electronic product display screen color correction method according to claim 2, characterized in that: The method for obtaining the chromaticity coordinate information of the picture displayed on the display screen also includes: The chromaticity coordinate information of the central points of the plurality of display images is obtained.

4. The electronic product display screen color correction method according to claim 2, characterized in that: The method for calculating and obtaining a corrected timing control code according to the chromaticity coordinate information comprises: An average chromaticity deviation value is calculated according to the plurality of chromaticity coordinate information, and a corrected timing control code is obtained according to the average chromaticity deviation value.

5. The electronic product display screen color correction method according to claim 1, characterized in that: The method of burning the corrected timing control code to the control board of the display screen comprises: The corrected timing control code is transmitted to the electronic product through wireless communication, and burned into the control board of the display screen through an I2C port or an AUX port.

6. A color correction device for an electronic product display screen, characterized in that: Used for color correction of electronic products in operation, including: An acquisition module (110), the acquisition module (110) being configured to acquire chromaticity coordinate information of a picture displayed on the display screen; A calculation module (120), the calculation module (120) being configured to calculate and obtain a corrected timing control code according to the chromaticity coordinate information; A burning module (130) is configured to burn the corrected timing control code into a control board of the display screen, so that the control board can control the liquid crystal rotation angle of the display screen.

7. The electronic product display screen color correction device according to claim 6, characterized in that: When the electronic product is in operation, the display screen displays images of different colors; The acquisition module (110) is also configured to acquire the chromaticity coordinate information of the plurality of display images.

8. The electronic product display screen color correction device according to claim 7, characterized in that: The acquisition module (110) is also configured to acquire the chromaticity coordinate information of the central point positions of a plurality of display images.

9. The electronic product display screen color correction device according to claim 6, characterized in that: The calculation module (120) is further configured to calculate an average chromaticity deviation value according to the plurality of chromaticity coordinate information, and to obtain a corrected timing control code according to the average chromaticity deviation value.

10. The electronic product display screen color correction device according to claim 6, characterized in that: It also includes a wireless communication module, which is configured to transmit the corrected timing control code to the electronic product through wireless communication; The burning module (130) is also configured to burn to the control board of the display screen through an I2C port or an AUX port.

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