Display screen brightness and chrominance consistency detection method

Abstract

The invention discloses a display screen brightness and chrominance consistency detection method, which comprises the following steps: obtaining a detection image of a to-be-detected display screen through a first filter, and respectively obtaining first response values of a plurality of pixel points on the detection image under the first filter; acquiring a detection image of the to-be-detected display screen through a second filter having a different transmittance curve from the first filter, and respectively obtaining second response values of the plurality of pixel points under the second filter; representing the central wavelength of the corresponding pixel point by a ratio of the first response value to the second response value to obtain a central wavelength difference between different pixel points; and judging the chromaticity consistency of each pixel point on the to-be-detected display screen according to the central wavelength difference. The spectrum deviation of a measured light source can be directly judged, then the chromaticity and brightness uniformity of the measured light source can be judged, the necessary calibration process of an imaging colorimeter or an imaging brightness meter is avoided, and the problem that a probe type color analyzer limits the measurement space and the measurement distance is solved.

Description

technical field [0001] The invention belongs to the technical field of display detection, and in particular relates to a method for detecting the brightness and chromaticity consistency of a display screen. Background technique [0002] The uniformity of display chromaticity and brightness is always the focus of display quality control, including the consistency of chromaticity and brightness at different positions of the same screen and the consistency of chromaticity and brightness at different viewing angles at the same position. The non-uniformity of chromaticity and brightness of the screen is usually improved by using Demura technology, that is, compensation data is generated based on the imaging data to compensate for the non-uniformity of the display screen. The uniformity of the screen body after Demura repair usually needs to be confirmed by measuring the chromaticity and brightness of multiple points, and it can only be evaluated by offline measurement of several ...

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