Display device chromaticity adjustment method and device

Abstract

Provided are a method and device for adjusting the chromaticity of a display device. The chromaticity adjustment method configures a unified code module at the end of a display device to be tested, so that the display device to be tested can receive instructions sent by a serial port to adjust its own display chromaticity. During the detection and adjustment process, the chromaticity of the display device is floated within a certain range according to a preset interval according to a target chromaticity space coordinate value until the target picture finally output meets the chromaticity requirements. By implementing this solution, on the one hand, the chromaticity detection efficiency of the display device is significantly improved. More importantly, a unified code module is adopted to achieve one-by-one chromaticity adjustment of different devices while meeting the requirements of civil aviation software.

Description

Technical Field

[0001] The present invention relates to the field of display imaging technology, and in particular to a chromaticity adjustment method and device for adapting to a white field picture of a display device. Background Art

[0002] In the color standard adopted by most display devices, red (R), green (G) and blue (B) are selected as the basic colors. The electron gun hits the light-emitting electrodes of the above three colors to produce colors. Then, the three colors are mixed in different proportions to obtain a variety of different colors presented in the display area. Of course, there are some scenes in the prior art that will choose OGB instead of RGB as the basic color (light-emitting electrode), that is, orange (O), green (G) and blue (B). Most of these scenes are scenes with night vision requirements (or display requirements under no light conditions). For example, in many types of special equipment environments including airborne displays, because the red light wavelength will have a color difference effect when the night vision is compatible with the white field picture, OGB will be used as the basic color adjustment.

[0003] When developing display devices that meet night vision requirements, in order to ensure navigation and passenger safety, the display chromaticity must be verified before boarding. Taking the instrument that displays the flight attitude in the aircraft cabin as an example, different colors are used to distinguish the surface orientation and the sky orientation. For example, gray represents the ground and blue represents the sky. The correct color difference can make the gray and blue screen displays clearer. More importantly, when the chromaticity is normal, the boundary between gray and blue will also be more accurate. On the contrary, abnormal chromaticity will cause the colors at the junction of the sky and the earth on the attitude instrument to overlap and become difficult to distinguish, which will affect the flight personnel's judgment of the navigation attitude. In addition, chromaticity deviation will also cause the parameters on some instruments to overlap with the background color when the parameter color is similar to the display background, resulting in misleading data display. Therefore, it is necessary to calibrate the chromaticity of the display device.

[0004] Usually, the object of the device chromaticity verification is the chromaticity when the display device presents a white screen. The white screen is a pure white screen. In this state, the three colors of OGB, which are the basic colors, are all adjusted to the maximum chromaticity. However, it is often affected by uncontrollable factors such as the process. For devices of different batches and models, even if the basic colors are all at the maximum adjustment value, the white screen displayed by the device is not pure white. Or, according to the same chromaticity parameters, the colors displayed by devices of different batches may also deviate. Therefore, the verification of the white screen of the display device is to verify whether the white presented by the test object is pure white when the three colors of OGB are adjusted to the maximum value. However, according to the existing detection process, it is necessary to repeatedly burn and update the display program according to the results of the chromaticity test until the test results meet the preset requirements. In other words, each device needs to follow the above process to finally determine its unique parameters.

[0005] It can be seen that the existing detection process has an obvious problem of poor testing efficiency. Summary of the invention

[0006] In view of this, the present invention provides a method and apparatus for adjusting the chromaticity of a display device, which at least solves one of the above problems.

[0007] In order to solve the above technical problems, the first aspect of the present invention is to provide a method for adjusting the chromaticity of a display device, which is used to adjust the chromaticity of a white field picture displayed by a display device, comprising the following steps: configuring a data transceiver serial port for the display device to be tested to communicate with a chromaticity measuring instrument, the data transceiver serial port sending a measurement instruction to the chromaticity measuring instrument and receiving a measurement result returned by the chromaticity measuring instrument, the data transceiver serial port sending a chromaticity adjustment instruction to the display device; configuring the environment of the display device to be tested so that it adjusts its own display chromaticity after receiving the chromaticity adjustment instruction; and The transceiver serial port configures the initial chromaticity parameters of the display device to be tested, and configures the initial chromaticity parameters to float according to a preset time interval; the data transceiver serial port sends the chromaticity adjustment instruction so that the display device to be tested performs chromaticity display according to the initial chromaticity parameters; the colorimeter is placed directly opposite the display device to be tested, receives the measurement instruction and sends the measurement result to the data transceiver serial port; the data transceiver serial port adjusts the chromaticity parameters according to the measurement result to change the display chromaticity of the display device to be tested, until the chromaticity display screen of the display device to be tested meets the white field screen requirement.

[0008] As a preferred embodiment of the first aspect of the present scheme, the method of configuring the initial chromaticity parameters to float according to a preset time interval is specifically: configuring the floating amount and floating range of the chromaticity parameters according to the time interval, and configuring the chromaticity parameters to float in an increasing and / or decreasing manner according to a fixed reference value.

[0009] As a further preferred embodiment of the present invention, the step of adjusting the chromaticity parameters of the data transceiver serial port according to the measurement result is specifically as follows: in the chromaticity space, initial values ​​of at least three basic colors are configured to obtain a pure color picture corresponding to the three basic colors; a colorimeter performs chromaticity measurement on the pure color picture to obtain the chromaticity of the pure color picture and the coordinates of the basic colors in the chromaticity space; according to the target color coordinates of the white field picture, a ratio of the three basic colors is calculated; and according to the basic color ratio, the data transceiver serial port sends the chromaticity adjustment instruction to the display to be tested.

[0010] The second aspect of the present invention is to provide a display device chromaticity adjustment device, the device comprising: a chromaticity measuring instrument and a data transceiver serial port, the data transceiver serial port executes the above-mentioned display device chromaticity adjustment method to adjust the chromaticity of the display device to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 2 is a schematic diagram showing the structure of a chromaticity adjustment device for a display device in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0012] As mentioned above, different models of equipment, or equipment of the same model from different batches, are not guaranteed to display the same chromaticity content even if they are configured according to the same chromaticity parameters. The existing process adjusts parameters after repeated testing, and ultimately only achieves the effect of adjusting multiple devices one by one according to different chromaticity parameters. Even if the detection efficiency problem caused by this is not considered, this configuration method of different code parameters cannot meet the specific requirements for code parameter consistency in "Software Considerations in Airborne Systems and Equipment Qualification" (hereinafter referred to as DO-178). Often, after the equipment parameters are configured, the DO-178 requirements of the code parameters need to be verified.

[0013] Therefore, the preferred embodiment of the present invention first realizes that in order to avoid the need to perform DO-178 testing on the code after the adjustment is completed, it is still expected that a unified code is used between different devices. Then, the contradiction between the unified code and the different chromaticity parameters of multiple devices, or in other words, the adjustment of different chromaticity parameters through the unified code, becomes a practical problem that needs to be solved.

[0014] Embodiments of the present invention will be described below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims. In addition, in this specification, the drawings are not drawn to scale and the same reference numerals represent the same parts.

[0015] It should be noted that the expressions “first” and “second” used in the embodiments of the present invention are intended to distinguish two non-identical entities with the same name or non-identical parameters. It can be seen that “first” and “second” are only for the convenience of expression and should not be understood as limitations on the embodiments of the invention. The subsequent embodiments will not explain this one by one.

[0016] In this preferred embodiment, the equipment required for colorimetric detection is as follows Figure 1The architecture shown. It includes a colorimeter and a display device (display screen) to be tested. The colorimeter is connected to the display device, and data communication is achieved between the colorimeter and the display device through the corresponding interface (usually USART). The data interaction is usually completed by the color adjustment software on the mobile or non-mobile terminal. In this architecture, when measuring, the tester aligns the colorimeter with the display area of ​​the display device by hand or by supporting it on a stand. The colorimeter obtains the chromaticity data of the device under the current display effect according to the initial parameters set by the color adjustment software, and sends it to the display device. The color adjustment software calculates the chromaticity value based on the chromaticity data and sends it to the display device to adjust its chromaticity.

[0017] Obviously, if the initial parameters are modified manually, and the measurement results are judged and the detection method of the white field image chromaticity is set, the efficiency is not expected. It should be considered that in order to improve the detection efficiency and realize automatic detection, the adaptive adjustment of parameters is the primary means. The adaptive adjustment of parameters generally includes two aspects:

[0018] 1) At a certain preset time interval (e.g., 2000ms), the software end modifies the detection parameters once through the interface to form a new adjustment instruction;

[0019] 2) The adaptive change amount of the parameter is configured to change toward the positive or negative direction of the reference value according to the preset numerical change range based on the specific parameter (for example, the chromaticity value change range of OGB is 73±5, 50±10, and 27±1 respectively).

[0020] In this way, the software end continuously sends signals to the colorimeter through the interface in a timed sequence and receives the colorimetric value returned by the measuring instrument. If the colorimetric requirement is still not within the reference value range according to the current return value, the measurement parameters contained in the detection signal are adjusted and the colorimetric adjustment instruction is resent until the final return result meets the requirements. Of course, this control of parameter adaptive correction can be a semi-automatic method with manual intervention to determine when and how the parameters change, or it can be a fully automatic method in which the processing end calibrates according to a preset range.

[0021] Taking the fully automatic calibration method as an example, the specific parameter configuration of the software end is explained. Chromaticity measurement needs to rely on the specific calibration of color. In this preferred embodiment, the existing CIE1931 color space is selected as the basis for color calibration. The CIE1931 color space is that the selected basic colors are used to describe different colors using a color superposition model. Thus, in the coordinate system formed by the color space, a certain color can be represented by the superposition of its component values ​​of the three primary colors. The component values ​​of the three primary colors are called tristimulus values, which are represented by the coordinate values ​​of a point in the reference coordinate system. The conversion between the stimulus value of a certain color and the coordinates of a point in the chromaticity coordinate system can refer to the method described in the Chinese invention patent with authorization announcement number CN107101172B. For example, it is known that the target value is a standard pure white screen, and the coordinates in the CIE1931 color coordinates are (0.313, 0.329). According to the coordinate values ​​of the three primary colors and the target color coordinates, the ratio of the three primary colors to be adjusted can be obtained (for example, the pure white screen generated when "1:0.9:0.8" meets the requirements), and the chromaticity adjustment instruction is sent to the display device.

[0022] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A method for adjusting the chromaticity of a display device, the method being used to adjust the chromaticity of a white field image displayed by a display device, comprising the following steps: A data transceiver serial port is configured for the display device to be tested to realize communication with the colorimeter, the data transceiver serial port sends a measurement instruction to the colorimeter and receives the measurement result returned by the colorimeter, and the data transceiver serial port sends a chromaticity adjustment instruction to the display device; Configuring the environment of the display device to be tested so that it adjusts its own display chromaticity after receiving the chromaticity adjustment instruction; Configuring the initial chromaticity parameters of the display device to be tested through the data transceiver serial port, and configuring the initial chromaticity parameters to float according to a preset time interval; The data transceiver serial port sends the chromaticity adjustment instruction so that the display device to be tested performs chromaticity display according to the initial chromaticity parameters; Place the colorimeter directly on the display device to be measured, receive the measurement instruction and send the measurement result to the data transceiver serial port; The data transceiver serial port adjusts the chromaticity parameter according to the measurement result to change the display chromaticity of the display device under test until the chromaticity display picture of the display device under test meets the white field picture requirement.

2. The method for adjusting the chromaticity of a display device according to claim 1, wherein: The specific method of configuring the initial chromaticity parameters to float according to the preset time interval is: Configure the amount and range by which the chroma parameter floats at the time interval, and, The colorimetric parameters are configured to float in an increasing and / or decreasing manner according to a fixed reference value.

3. The method for adjusting the chromaticity of a display device according to claim 2, wherein: The step of adjusting the chromaticity parameter according to the measurement result by the data transceiver serial port is specifically as follows: In the chromaticity space, initial values ​​of at least three basic colors are configured to obtain pure color images corresponding to the three basic colors; The chromaticity measuring instrument measures the chromaticity of the pure color picture to obtain the chromaticity of the pure color picture and the coordinates of the basic color in the chromaticity space; Calculating the ratio of three basic colors according to the target color coordinates of the white field image; The data transceiver serial port sends the chromaticity adjustment instruction to the display to be tested according to the basic color ratio.

4. A chromaticity adjustment device for a display device, the device comprising: A chromaticity measuring instrument and a data transceiver serial port, wherein the data transceiver serial port executes the display device chromaticity adjustment method according to any one of claims 1 to 3 to adjust the chromaticity of the display device to be measured.

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