System and method for carrying out light/electrical/thermal ageing comprehensive testing on light-emitting diodes

Abstract

The invention discloses a system and method for carrying out in-situ light / electrical / thermal comprehensive testing on a plurality of light-emitting diode devices while carrying out accelerated aging on the light-emitting diode devices. The detection system comprises a light-emitting diode loading circuit board (1), an electrical parameter generating and testing device (2), a multi-channel drive control device (3), a light detection device (4), a light detection control device (5), a light signal processing analysis device (6), a constant temperature control device (7), a temperature detection device (8) and a central monitoring and processing computer (9). By using the system and method disclosed by the invention, a plurality of light-emitting diodes can be subjected to accelerated aging, and the electrical, optical and thermal properties of each light-emitting diode device can be tested one by one through setting time nodes by the computer so as to comprehensively understand the overall physical properties of the light-emitting diode (LED) devices.

Description

technical field [0001] The invention belongs to the technical field of detection of semiconductor light-emitting diodes, and in particular relates to a system and method for comprehensive detection of photoelectric and thermal aging of light-emitting diodes. Background technique [0002] A light emitting diode (light emitting diode, LED) is a solid light emitting device using a semiconductor chip as a light emitting material. The semiconductor material is used to form a PN junction, and in the case of an external electric field, the injected electron-hole recombination emits light, and directly converts electrical energy into light energy. Its luminous color varies with the semiconductor composition used. [0003] In 1907, Henry Joseph Round successfully prepared the first light-emitting diode. Subsequently, after about half a century of development, the materials of light-emitting diodes have experienced SiC, III-V compounds, etc., and the wavelength range covers infrared...

AI Technical Summary

Problems solved by technology

[0007] In addition, although there are test devices for measuring light, electricity, and heat of LEDs in the domestic and foreign markets, and there are also aging devices for LEDs, but in general, they are performed independently on different operating platforms, requiring operators to interrupt the aging process. During the process, the light-emitting diodes are manually removed and placed on another light-emitting diode optical, electrical, and thermal testing device for testing. In-situ testing cannot be performed, so there are certain limitations in the reliability analysis of LEDs.

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