Device for detecting service life of light emitting diode (LED) in real time
A technology of real-time detection and lifespan, applied in measuring devices, photometry, optical radiation measurement, etc., can solve the problem that the small light probe cannot completely collect the beams of different illuminants, cannot fully reflect the real situation of the test sample, and affect the accuracy of the test results and other problems to achieve the effect of not being easily disturbed, realizing automatic control, and reducing measurement errors
Inactive Publication Date: 2012-10-03
HANGZHOU ZHEJIANG UNIV SENSING INSTR
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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
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[0024] Embodiment: LED lifetime real-time detection device, as figure 1 As shown, it includes a temperature control box 1, a support seat 2 located in the temperature control box 1, and an optical transmitter 4, a photometer 5 connected to the measuring end of the optical transmitter 4, and the other end of the optical transmitter 4 is for collecting end, the collection end is set in cooperation with the support seat 2, and is characterized in that it also includes a light collector 3 with a light entrance window and a light exit window. The collection end of the optical transmitter 4 is connected to the light exit window of the light collector 3, and the support seat 2 cooperate with the light entrance window on the light collector 3.
[0025] The light transmitter 4 can be a high temperature resistant light beam transmission device such as an optical fiber or a lens, and the photometer 5 can be a spectrometer or a photometer. This connection is primarily an optical transpor...
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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...
Claims
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Inventor 牟同升
Owner HANGZHOU ZHEJIANG UNIV SENSING INSTR
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