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Alarm system and method of light emitting diodes

A technology of light-emitting diodes and light-emitting units, which is applied in the testing of single semiconductor devices, etc., can solve the problems of high risk, inability to accurately predict the lifespan and light output status, etc.

Active Publication Date: 2009-12-02
EPISTAR CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

If it happens to signal lights and railway signal lights, the danger is even higher. Among existing LED and traditional light sources, especially LEDs, due to the characteristics of semiconductor materials, the light output gradually decreases during use, and according to the use temperature Different from the environmental conditions, the real life and light output status of each LED cannot be accurately estimated. Generally, complete failure occurs during use. Although it is inconvenient to use for general lighting, it is acceptable. If it is used for safety or signal The light source is very dangerous, such as car lights, signal lights and railway signal lights

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Embodiment Construction

[0050] figure 1 It is a schematic diagram of the structure of LED microcrystals. figure 1 The LED chips shown in can be either AC LEDs or HVDC LEDs. On the LED chip, the LED is first divided into dozens of microcrystalline grains, and then electrically connected. Therefore, the defect characteristics of the chip are also completely divided into dozens of blocks, and there will be no parallel chain effect. When one microcrystal dies on the LED chip fails, it will not make the entire LED completely non-luminous, so the impact of a single microcrystal die failure will be calculated with the total number of microcrystal grains as the denominator. Therefore, the more the number of micro-crystals is divided, the lower the influence of single micro-crystal failure will be. Taking an AC LED composed of 36 micro-crystals as an example, the influence of single micro-crystal failure is only 2.7% and the scope of influence is very likely. Only in a certain half-wave of alternating curre...

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Abstract

The invention provides an alarm system of light emitting diodes, comprising a luminescence unit, a detection device and an alarm device, wherein the luminescence unit comprises a plurality of light emitting diode crystallites, the detection device is used for detecting the luminescence unit and outputting detection results, and the alarm device displays the damage states of the light emitting diode crystallites in the luminescence unit according to the detection results.

Description

technical field [0001] The invention relates to a warning system and method of light-emitting diodes, in particular to a warning system and method of light-emitting diodes with effective life detection of light-emitting diodes. Background technique [0002] Light Emitting Diode (LED), due to its high shock resistance, long life, low power consumption, and low heat generation, its application range covers various items in daily life, such as home appliances and various Indicator lamps or light sources of type instruments, etc. In recent years, with the emergence of white light-emitting diodes (White Light-Emitting Diode, WLED), LED can only be used in the past and can only be used in signal lights, neon lights, etc., and began to move towards the field of electronic lighting, including the direction of the car. Lamps, digital camera flashes, etc., will replace incandescent and fluorescent lamps in the future as the main home lighting. [0003] Generally, a traditional LED e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26
Inventor 林明德林明耀戴光佑刘芷瑄
Owner EPISTAR CORP