Measuring method for colorimetric parameters of LED display screen

A technology of LED display screen and measurement method, which is applied in the direction of static indicators, cathode ray tube indicators, instruments, etc., and can solve problems such as errors and excessive errors of instruments

Inactive Publication Date: 2009-09-09
天津光杰光电有限公司
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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

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  • Measuring method for colorimetric parameters of LED display screen
  • Measuring method for colorimetric parameters of LED display screen
  • Measuring method for colorimetric parameters of LED display screen

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Embodiment Construction

[0074] Below in conjunction with the preferred embodiment, the specific implementation mode and features provided according to the present invention are described in detail as follows:

[0075] 1. According to the characteristics of the LED display, select the appropriate measuring instrument and formulate the measurement method

[0076] All evaluations and objective measurements should be carried out at a distance to achieve the spatial color mixing effect, and the light probe collection range should not be less than 16 adjacent pixels in the white field chromaticity coordinates of the measurement display screen. Since the physical point spacing and physical density of various display screens are different, a luminance meter and a color luminance meter with adjustable field of view solid angles should be used, and should contain 2 0 、3 0 Such as large field of view, its working range should reach several thousand nits or more.

[0077] The physical point spacing of LED scre...

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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...

Claims

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Application Information

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IPC IPC(8): G09G3/00G09G3/32G09G5/02
Inventor 倪孟麟张莹张津杜玉何春艳康婧
Owner 天津光杰光电有限公司
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