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White or ultraviolet leds containing a getter system

A getter, peripheral technology for white or UV LEDs. It can solve the problems of no arrival, loss of LED luminous efficiency, and no reflection.

Inactive Publication Date: 2010-03-31
SAES GETTERS SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has been observed that in the case of the configuration described above blue or UV radiation emanating from the active material and incident on the getter is not reflected (or only very little is reflected) due to the surface morphology, so Does not reach the phosphor, resulting in loss of LED luminous efficiency

Method used

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  • White or ultraviolet leds containing a getter system
  • White or ultraviolet leds containing a getter system
  • White or ultraviolet leds containing a getter system

Examples

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Embodiment Construction

[0017] figure 1 The first metal part with a getter used in the LED of the present invention is shown. The shape of the component 10 is a metal belt 11 with three "pillars" 12; the term "metal belt" means an endless belt made of pure metal or metal alloy. The "pillars" may be formed by cutting from the same metal sheet that forms the belt 11, or may be made separately and then fixed to the belt, for example by welding. The outer surface of the belt 11 is coated with a getter material 13 deposited.

[0018] figure 2 An alternative embodiment of the metal part with a getter used in the LED of the present invention is shown. In this case, the metal part 20 consists only of a metal strip 21 with a getter material 22 deposited on its outer surface.

[0019] In the two cases of the belt 11 and the belt 21, for the sake of simplicity, the drawings both show a ring-like closed element that can be obtained by cutting a cylindrical surface; however, the production of these belts is genera...

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Abstract

LEDs (30) are described containing a getter system comprising a getter material (13) and a metallic part (10), in which the getter material is optically shielded from the metallic part.

Description

Technical field [0001] The present invention relates to a white or ultraviolet LED containing a getter system. Background technique [0002] LEDs (Light Emitting Diodes) are used as light sources in various applications such as traffic lights, conventional lighting signs, illuminators or signs in automobiles, backlights of liquid crystal displays, and various other applications currently under development. The diffusion of such light sources requires the availability of white light LED sources. [0003] The light emission of the LED is caused by the recombination of electrons and holes in a semiconductor material, such as aluminum gallium arsenide (AlGaAs), gallium nitride (GaN), aluminum nitride (AlN), and so on. Each semiconductor material only emits light in a specific spectral range: for example, AlGaAs emits infrared and red light, GaN emits green and blue light, and AlN emits ultraviolet light (UV). [0004] Therefore, in order to generate white light, three different LEDs em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01S5/022H01L33/44H01L33/48H01L33/56
CPCH01L33/44H01L33/483H01L33/56H01L33/48
Inventor 科拉多·卡雷蒂罗伯托·詹南托尼奥S·龙德纳
Owner SAES GETTERS SPA