Light color-variable LED structure

An LED structure and LED chip technology, applied in electrical components, circuits, semiconductor devices, etc., to simplify the structure and drive requirements, improve reliability and ease of maintenance, and reduce components.

Inactive Publication Date: 2016-02-17
HENGDIAN GRP TOSPO LIGHTING
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  • Abstract
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  • Claims
  • Application Information

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[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] The working principle of the present invention is:

[0022] In the present invention, the blue LED chip array is arranged on the COB substrate, and the chips are alternately divided into two groups, A and B. The fluorescent powder on the fluorescent film corresponding to group A is thinner or has a lower density, and the fluorescent powder on the fluorescent film corresponding to group B is thinner. If it is thicker or denser, the color temperature corresponding to the light emitted by group A is higher, and the color temperature corresponding to the light emitted by group B is lower. A and B are independently driven, and when the luminous intensity ratios of A and B groups are different, the overall light color of the LED will change. Controlling the driving ratio of the A and B groups of chips can realize the adjustable LED light color.

[0023] Such as figure 1 ...

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Abstract

The invention discloses a light color-variable LED structure. The light color-variable LED structure is composed of blue light LED chips and a yellow fluorescent powder film, wherein the plurality of blue light LED chips are fixedly arranged on a COB substrate so as to form an LED array, and the yellow fluorescent film coats the LED chips, the yellow fluorescent powder film is of a periodic structure, and portions of the yellow fluorescent powder film which are corresponding to the different blue light LED chips have different thicknesses. The blue LED chips are alternately divided into an A group and a B group; the thickness or density of fluorescent powder on the yellow fluorescent powder film which is corresponding to the A group is small; the thickness or density of fluorescent powder on the yellow fluorescent powder film which is corresponding to the A group is large; color temperature corresponding to light emitted by the A group is high; and color temperature corresponding to light emitted by the B group is low; the A group and the B group are independently driven, so that the luminous intensity ratios of the A group and the B group are different, and therefore, the overall light color of the LED changes, thus, adjustability of light color of the LED can be realized through controlling the driving ratios of the A group and the B group.

Description

technical field [0001] The invention relates to an LED packaging structure, in particular to an LED structure with variable light color. Background technique [0002] With the increasingly urgent demand for energy saving and emission reduction, the continuous development of LED technology and the continuous improvement of light efficiency, LED lighting has been more and more widely used, and the trend of replacing traditional incandescent lamps and fluorescent lamps is becoming more and more obvious. People's requirements for LED lamps are getting higher and higher, from simple replacement of traditional lamps to on-demand lighting, scene lighting, and secondary energy saving, which puts forward requirements for LED lamps with variable light color. There are many ways to realize variable light color LED. [0003] Existing methods such as mixed lighting of cold and warm two-color LEDs in proportion, RGB three-color LED lighting, mixed lighting of white light and narrow-spect...

Claims

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Application Information

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IPC IPC(8): H01L33/50
CPCH01L33/505
Inventor 倪强杜国红赵宇飞吴建朝
Owner HENGDIAN GRP TOSPO LIGHTING
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