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LED display optoelectronic performance testing method analysis do you know?
In recent years, LED display technology has developed rapidly. Various LED display devices such as special-shaped screens, VR interactive screens, and high-definition small-pitch LED displays have been introduced to the market, and they have been widely welcomed by the industry.
In today's LED display screen to become the darling of the market, we need to understand some parameters and detection methods of the photoelectric performance of LED display.
Full-color LED display photoelectric function index
Electrical characteristics include lamp power and power factor; thermal features include heat resistance and junction temperature; color characteristics include correlated color temperature, color contrast index, chromaticity coordinates, chroma forgiveness, dominant wavelength (monochrome), and uneven color distribution. Uniformity and color space; Day features include switching frequency tests, days/faster life tests, lumen repair rate (light-through retention rate)/strength repair rate.
Full-color LED display photoelectric detection method
Reflective cup MR16 or PAR beam viewing point, light intensity can be measured by a small bedroom spread photometric measuring device, when the test, mechanical axis, axial line, defect is the abnormal operating status of the test posture, the need for revised test results; LED lamp The light pass can also be used to measure the spread of a photometric measuring device, when the test gamma scales to 180 degrees, and the middle of the mechanical axis coincides with the light. The flaw is that the exam time is too long.
Full-color LED display photoelectric color function first parameter contains
Lamp total power, power factor, light intensity distribution, total luminous flux output of lamps, output luminous efficiency, lumen maintenance rate/ luminous flux retention rate, correlated color temperature, color rendering index, color tolerance, color coordinates, spatial heterogeneity of chromaticity, etc. . Under the premise of the correct test method, after selecting the appropriate detection methods to complete the full-color LED display accurate measurement of photoelectric color function parameters, scientific evaluation of the full-color LED display the current status of the nature of the function and provide data support for the trend.