Program-controlled LED aging test apparatus

Abstract

The invention relates to a program-controlled LED aging test apparatus. According to the apparatus, a device working power supply module is respectively connected with a microprocessor module, a current / voltage regulator module, a D / A conversion module, a temperature detection and alarm module, a keyboard module, an LED display module, a 485 communication module, and a 232 communication module. The current / voltage regulator module, a D / A conversion module, a temperature detection and alarm module, a keyboard module, an LED display module, a 485 communication module, and a 232 communication module are respectively connected with the microprocessor module. A power output power supply module is connected with the current / voltage regulator module. And the D / A conversion module is connected with the current / voltage regulator module. According to the invention, the current stabilization output or pulse outputs with different frequencies is / are realized; and a duty ratio can be adjusted; besides, the apparatus has timing, power down protection and alarming functions and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic detection, and relates to a program-controlled LED aging test device, which is mainly used for the aging test of LED devices. Background technique [0002] The LED industry is developing rapidly, and LED devices are quite mature, but systematic research on device failure mechanisms is still lacking. In the links of design, manufacturing, and application, the reliability of LEDs has always been a problem that plagues the industry and directly affects the application field. Expand and deepen. In lighting, display equipment and other applications, LED devices are often composed of multiple LEDs, which have very high requirements for electrical performance stability, light and color performance attenuation consistency, and service life. After working for a long time, the color temperature of each LED, Color rendering, color purity, spectral distribution, light uniformity, and illuminance will all ...

AI Technical Summary

Problems solved by technology

[0002] The LED industry is developing rapidly, and LED devices are quite mature, but systematic research on device failure mechanisms is still lacking. In the links of design, manufacturing, and application, the reliability of LEDs has always been a problem that plagues the industry and directly affects the application field. Expand and deepen

In lighting, display equipment and other applications, LED devices are often composed of multiple LEDs, which have very high requirements for electrical performance stability, light and color performance attenuation consistency, and service life. After working for a long time, the color temperature of each LED, Color rendering, color purity, spectral distribution, light uniformity, and illuminance will all change with time; in addition, LEDs that work normally at the initial stage of installation will appear dark, flickering, malfunctioning, Intermittent lighting and other phenomena will cause serious damage to the product

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