Reflection white-light LED excited by fluorescent powder

A light-emitting diode and reflective technology, which is applied in the direction of reflectors, semiconductor devices of light-emitting elements, light sources, etc., can solve the problems of phosphor degradation, increased process complexity, and yield decline.

Inactive Publication Date: 2006-11-29
陈隆建 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above-mentioned technologies has solved the problem of deterioration of the phosphor powder in direct contact due to the heat generated by the light-emitting diode itself.
In addition, the setting of filters or reflectors will also increase the complexity of the process, resulting in higher costs and lower yields

Method used

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  • Reflection white-light LED excited by fluorescent powder
  • Reflection white-light LED excited by fluorescent powder
  • Reflection white-light LED excited by fluorescent powder

Examples

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Embodiment Construction

[0025] The above and other objectives and advantages of the present invention will be described in detail below in conjunction with the drawings, detailed description of the embodiments and scope of claims. It should be noted that each drawing is provided for illustrating the essence of the present invention, and should not be regarded as a definition of the scope of the present invention. For a definition of the scope of the invention, reference is made to the claims.

[0026] Figure 1a , Figure 1b It is a side view and a front view respectively showing the white light emitting diode according to the first embodiment of the present invention. As shown in the figure, in the white light emitting diode proposed by the present invention, the conventional blue or ultraviolet light emitting diode chip 10 is disposed on the circuit board 20 having positive and negative electrodes 21 and 22 . When an external voltage is applied to the positive and negative electrodes 21 and 22, t...

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Abstract

A white light LED of reflection type by applying fluorescent powder excitation is prepared as arranging reflector on outgoing light path of blue light or ultraviolet ray diode in proper angle, shooting out said outgoing light by light outgoing surface of LED after it is reflected by reflector, coating fluorescent powder on reflector or on light outgoing surface of diode to let fluorescent powder generate white light by exciting blue light or ultraviolet ray form diode on fluorescent powder.

Description

technical field [0001] The invention relates to a white light emitting diode, in particular to a white light emitting diode which separates the fluorescent powder and the diode chip and excites the fluorescent powder in a reflective manner. Background technique [0002] At present, the common and relatively mature white light emitting diode technology is to excite the yellow phosphor powder coated on it or filled in its periphery through the blue light emitting diode chip. The yellow light generated after the phosphor powder is excited and the blue light used for excitation Complementary to produce two wavelengths of white light. The white light produced in this way is usually difficult to control because of the ratio of blue light and yellow light involved in color matching, and there are problems such as uneven light color, high color temperature, and low color rendering. [0003] Another similar technology is to use ultraviolet light-emitting diode chips, so that the ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00F21S2/00F21V7/00F21V3/00F21K9/64F21K9/68H01L33/50
Inventor 陈隆建蓝文厚简奉谷
Owner 陈隆建
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