Device for detecting service life of light emitting diode (LED) in real time

Abstract

The invention relates to a device for detecting the service life of a light emitting diode (LED) in real time. The device comprises a temperature control box, a supporting base and light transmission devices which are arranged in the temperature control box, and a light measuring apparatus which is connected with measuring ends of the light transmission devices, wherein the other end of each light transmission device is an acquisition end; and the acquisition ends are matched with the supporting base. The device is characterized by also comprising light collectors with light inlet windows and light outlet windows, wherein the acquisition ends of the light transmission devices are connected to the light outlet windows of the light collectors; and the supporting base is matched with the light inlet windows on the light collectors. The device has the excellent characteristics that 1, the luminous power or the luminous flux of an LED sample at certain working temperature can be measured directly by the light measuring apparatus and a temperature measuring apparatus, so that automatic control can be realized, repetitive manual operation is not needed, measurement errors are reduced, and measurement accuracy is improved; and 2, as the light collectors (such as light integrating balls) are used for acquiring light sources, the detection result is difficultly influenced by samples aside, and the service life of an LED product can be predicated accurately.

Description

technical field [0001] The invention belongs to the testing field of LED products of semiconductor light-emitting devices, and in particular relates to a real-time detection device for LED life. Background technique [0002] LED is a semiconductor light-emitting device that can convert electrical energy into light energy. Many advantages are favored, and its application is gradually penetrating into the field of general lighting from night scene lighting and LCD TV backlight. [0003] The life detection method of the traditional light source is to actually ignite the test product under its normal working conditions, and calculate its life according to its light decay or failure time. Since the lifespan of semiconductor light-emitting devices is generally very long, for example, the lifespan of LED products currently on the market is nominally more than tens of thousands of hours, so traditional detection methods are not suitable for actual operation and application. [000...

AI Technical Summary

Problems solved by technology

Because this method needs to be taken out of the test box repeatedly, and then tested after cooling down, the operation is complicated and inconvenient, and many uncertain factors will be introduced by repeated heating and cooling, which will affect the accuracy of the test results.

[0005] The existing public information also introduces the use of optical fiber receivers to measure the luminous parameters of test samples under real-time test conditions. Since different luminous bodies have different beam angles, and the optical probe on the optical fiber receiver is small, it cannot completely collect different parameters. The light beam emitted by the luminous body cannot fully reflect the real situation of the test sample, and the detection accuracy is low

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