Display screen chromaticity measurement method and device and terminal equipment

Abstract

The invention discloses a display screen chromaticity measurement method and device and terminal equipment. The measurement method comprises the following steps of: obtaining multi-channel image data,shot by an image detector, of a to-be-detected display screen, and dividing the image plane of the image detector into a plurality of identical image capture arrays, wherein each image capture arrayis provided with a plurality of spectral response channels with different spectral transmittance, and each spectral response channel correspondingly receives an incident light signal of one waveband;extracting and calibrating response values of a plurality of spectral response channels in each image capture array from the multichannel image data, and obtaining tristimulus values of all pixel points in the display screen to be detected; and obtaining sample information of multiple spectral response channels of the display screen at the same time through one-time image capture by utilizing themulti-channel image detector, so that spectral deviation of the display screen caused by tiny difference of the manufacturing process can be eliminated, and the measurement precision and the robustness of the measurement result are improved.

Description

technical field [0001] The invention belongs to the technical field of machine vision, and more specifically relates to a display chromaticity measurement method, device and terminal equipment, which are suitable for chromaticity measurement of LCD and OLED display screens. Background technique [0002] In the display industry, the chromaticity coordinates of the light emitted by the display screen are very important information. It can not only reflect the intensity and color of the light emitted by the screen simply and intuitively, but also can be used to analyze the color shift phenomenon of the screen body and assist in the screen inspection. Body color cast calibration. Therefore, it is of great significance to realize fast and accurate chromaticity measurement of the entire screen body. [0003] The screens in the display industry are mainly used for viewing by the human eye. The human eye is not a very precise instrument, and can only distinguish the three primary c...

AI Technical Summary

Problems solved by technology

However, to analyze the color shift of the display body, it is necessary to measure the entire surface of the screen body. If a single-point measuring instrument is used to measure points one by one, the measurement efficiency is very low, which cannot meet the needs of assembly line production testing, and the practicability is poor.

[0006] (2) Imaging spectrometers, including line-scan imaging spectrometers and liquid crystal imaging spectrometers; among them, the core components of liquid crystal imaging spectrometers include optical lenses, liquid crystal tunable filters (Liquid Crystal Tunable Filters, LCTF), CCD detectors and control systems , the LCTF is placed between the optical lens and the CCD photosensitive element. Its working principle is: the light reflected by the item to be measured enters the optical lens and is tuned and filtered by the LCTF (tuned by selecting the transmission wavelength through the liquid crystal retarder), and the CCD detector Imaging; in the working state, every time the camera is exposed, the system records the two-dimensional image data of a single wavelength, and the selection of the observation center wavelength is controlled by the computer. The computer determines the next center wavelength and obtains the image data by sending instructions, and so on until Complete the imaging tasks of all wavelengths; although they can also measure the chromaticity of the area array, the line-scan imaging spectrometer uses a line-scanning line-by-line measurement method, and the liquid crystal imaging spectrometer realizes different spectral measurements by changing the liquid crystal film, and the system structure is complex , although the measurement efficiency is slightly higher than that of single-point measurin

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