Measuring method for colorimetric parameters of LED display screen

Abstract

The invention relates to a measuring method for colorimetric parameters of an LED display screen. According to the luminescent characteristics of the LED display screen, the method creates and stipulates the measuring steps of color domain coverage ratio, non-uniformity of white field chromaticity and color reproduction of the LED display screen and a calculating method, provides a method for improving the accuracy of measuring and debugging the value and the range of the white field chromaticity and improving the accuracy of measuring primary wavelength of base color, and carries out necessary discrimination to peak wavelength of an LED tube and primary wavelength of an LED screen from scientific concept. A 1980 color luminance meter which conforms to spetral tristimulus values and contains four groups of filter plates is adopted to measure the colorimetric parameters of the LED display screen accurately; by adopting the method, the accuracy of measurement can meet the technical requirements to the standard color luminance meter. A 1980 spectroradiometer with spectral bandwidth and the sampling interval of 1nm can accurately measure the peak wavelength of the LED tube. In the debugging process, a multiturn potentiometer is adopted to achieve the purpose of finely selecting the resistance value of a resistor. The core technology is the necessary premise and key of debugging and manufacturing the LED display screen with excellent color reproduction.

Description

technical field [0001] The invention relates to a method for measuring LED display screens, in particular to a method for measuring chromaticity parameters of LED display screens. Background technique [0002] At present, with the application of LED display screens in various important occasions, people have put forward higher requirements for the color quality of LED display screens; and the continuous improvement of the color quality of LED display screens will continue to expand the application and use value of LED display screens . [0003] However, the existing LED display measurement methods lack the measurement items of LED display color gamut coverage, and the measurement items of LED display white field chromaticity non-uniformity; There is an error in the error representation method (the chromaticity error should not be expressed as a percentage, but as an absolute value). At present, the LED display industry ignores the important reminders from the national autho...

AI Technical Summary

Problems solved by technology

[0006] 2. At present, there are problems in the method of specifying the chromaticity error in the LED industry standard (the chromaticity error should be expressed as an absolute value, not as a percentage), and there are too large errors in the actual commonly used instruments

Conversely, if an instrument cannot accurately measure and calculate X 1 、X 2 , Y, Z four components, on the contrary, it has the functions of calculating u’, v’, etc., which will still bring considerable errors

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