A kind of led life testing system and testing method thereof

Abstract

The invention discloses a LED life test system, which includes a refrigerator, an aluminum substrate, a temperature box with dual zones of cold and hot, and an integrating sphere. The electric cooling plate and the mounting plate of the former are fixedly installed on the Embedded in the opening of the mounting plate; the aluminum base plate is fixed on the surface of the electric refrigeration plate; the cold and hot dual-zone temperature box includes a cold box and a hot box separated by a heat insulation plate, and useful When the refrigerator is installed on the installation holes of the temperature box and the integrating sphere, the radiator is placed outside the cold box and the integrating sphere, and the aluminum substrate is placed on the hot box and the integrating sphere respectively. the inside of the ball. The refrigerator of the present invention can be moved as a whole without disassembling the LED, which greatly facilitates the life test of the LED; in addition, by connecting the lead wire of the aluminum substrate wiring solder joint to the switch switching circuit, each LED can be individually lit. LED, so as to achieve the purpose of individually testing the light, color and electricity parameters of each LED.

Description

technical field [0001] The present invention relates to an LED life test system and its test method, in particular to the structure of LED fixed part, refrigerator, and cold and hot dual-zone temperature box in the LED life test system, and the test method related to the improvement of the above structure. Background technique [0002] After a single LED is produced, an evaluation of its lifespan is required. At present, the more common practice is to extract certain LED samples from a batch of LEDs of the same type and age them for thousands of hours (usually not less than 6000 hours). Before aging, test the light, color, electricity parameters of each LED, And during the aging process, measure its photochromic and electrical parameters at regular intervals; the longer the aging time, the greater the attenuation of the LED light output, save the results of each measurement, and calculate the light output of the LED after aging according to a certain algorithm Attenuation, ...

AI Technical Summary

Problems solved by technology

This brings about several problems: First, repeated disassembly and installation requires a lot of labor and time, which dramatically increases the cost of aging and wastes time; second, repeated disassembly and installation can easily damage the LED, increasing the uncertainty of the entire test , that is to say, the tester may not be able to judge whether the damage of a certain LED is caused by human factors during the disassembly process or the product quality of the LED itself, which cannot achieve the purpose of the test; moreover, it is very easy during the disassembly and installation process Stains and scratches on the optical lens of the LED will affect its light output characteristics, thereby affecting the measurement results and causing deviations in the calculation results

However, after the LED is lit, the temperature will rise sharply, resulting in a huge temperature difference between the surface and the surrounding air.

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