LED brightness test adjustment device and system

Abstract

The invention discloses an LED brightness test adjustment device and system. The device comprises a driving assembly, an optical attenuation sheet installation base, a sensor and a plurality of optical attenuation sheets having different light attenuation degrees. The optical attenuation sheets are arranged at different places of the optical attenuation sheet installation base correspondingly; the driving assembly is used for driving the optical attenuation sheet installation base to rotate, and the optical attenuation sheet installation base drives the optical attenuation sheets to move to a set light passing place; and the sensor is used for detecting the current position of the optical attenuation sheet installation base to judge the current optical attenuation sheet located in the light passing place. The device and method improve efficiency of adjusting attenuation degree of the light entering an integrating sphere, and are high in accuracy.

Description

【Technical field】 [0001] The invention relates to the field of LED testing, in particular to an LED brightness testing and adjusting device and system. 【Background technique】 [0002] The current LED testing machine needs to use a spectrometer to test various optical parameters of the chip during the process of testing the chip. Due to the different specifications of LED chips, in order to make the testing machine compatible with various chip tests, it is necessary to attenuate the light with different brightness so that the attenuated light is within the normal range of the test. At this stage, the manual push-pull method is usually used to change different attenuation gears to adapt to the testing of core particles with different specifications. Different gears need to be switched manually by the tester, which is prone to gear switching errors, and the position of the integrating sphere and optical fiber changes due to the influence of external forces during the switching...

AI Technical Summary

Problems solved by technology

Different gears need to be manually switched by the tester, which is prone to gear switching errors, and the position of the integrating sphere and optical fiber changes due to the influence of external forces during the switching process, which eventually leads to a decrease in test consistency, or even errors, which affect the test effect

[0003] like figure 1 and figure 2 As shown, a commonly used manual adjustment device structure now includes an integrating sphere part and a brightness adjusting part. The integrating sphere part includes an integrating sphere lower shell 11, an integrating sphere upper shell 12, and a light blocking sheet 13, wherein the integrating sphere upper and lower shell parts The inside is a spherical cavity, and the light blocking sheet is located inside the sphere, and the inside of the cavity is sprayed with a reflective layer. The brightness adjustment part includes a base 21, a light shielding plate 22, an attenuation sheet 23, and a lens 24 (connected with an optical fiber, and the light of the optical fiber enters from the lens 24 and Through the attenuation sheet 23) and the cover plate 25, the attenuation sheet 23 has different specifications, and the attenuation sheets of different specifications can be switched by manually pushing the position of the shading plate to meet the test requirements of different products. Due to the limitation of size, the number of attenuation sheets is generally There are 3, and the adjustment gears are limited, and it is easy to be affected by external factors when adjusting the gears, such as the change of the optical fiber angle due to the influence of external forces, etc., which will cause the test accuracy to drop

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