Light-emitting diode (LED) lamp

A technology of LED lamps and green phosphors, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of low light extraction efficiency, low conversion efficiency of red phosphors, and reduced light extraction efficiency, so as to improve the conversion efficiency and reduce the use cost. , the effect of simple structure

Inactive Publication Date: 2013-06-05
王剑
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of red components in white light, and the low conversion efficiency of red phosphors, the light output efficiency is far lower than that of traditional yellow phosphors, resulting in a 40-50% reduction in the overall light output efficiency of this warm white LED lamp.

Method used

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  • Light-emitting diode (LED) lamp

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with drawings and embodiments.

[0009] Such as figure 1 As shown, the present invention includes a base 1, a blue chip 2, and two gold wires 3. The blue chip 2 has an excitation wavelength of 440-450 nm, and is fixed on the bottom of the base 1 by a crystal-bonding adhesive 4. The two ends of the gold wire 3 are respectively welded and fixed to the blue chip 2 and the base 1 to make them conduct with each other; the outer surface of the blue chip 2 is covered with a layer of green phosphor layer 5, and the green phosphor layer 5 is made of adhesive and The green fluorescent powder is mixed and dried. When mixing, it should be adjusted to a mixture that emits green light. The adhesive can be epoxy resin, silica gel, or a mixture of the two. The present invention uses silica gel, and the green fluorescent powder is silicic acid. Salt, the excitation wavelength of which is 500-510nm; the top of the gree...

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Abstract

The invention discloses a light-emitting diode (LED) lamp which comprises a substrate, a blue wafer and a gold line. The blue wafer is fixed at the bottom of the substrate through a solid crystal adhesive, two ends of the gold line are fixedly connected with the blue wafer and the substrate respectively, a green fluorescent powder layer is covered on the outer surface of the blue wafer, a red fluorescent powder layer is covered above the green fluorescent powder layer, and the upper surface of the red fluorescent powder layer is flush with the top surface of the substrate. The LED lamp is simple in structure. Due to the fact that low-energy blue light is not directly utilized to stimulate red fluorescent powder, conversion efficiency of the red fluorescent powder is greatly improved, luminous efficiency of the LED lamp is over 90% that of traditional yellow fluorescent powder, and using cost is reduced. In addition, different fluorescent powders are selected, high luminous efficiency is kept, and simultaneously color temperature and color rendering index are adjusted conveniently.

Description

technical field [0001] The invention relates to an LED lamp, in particular to a warm white LED lamp with high light extraction efficiency, belonging to the field of optoelectronic equipment. Background technique [0002] LED light-emitting diode is a solid-state semiconductor device that can directly convert electricity into light. The existing warm white LED lamp comprises a base, a blue chip, and a gold wire. The blue chip is fixed in the base, and the gold wire is respectively fixedly connected to the blue chip and the base. A layer of phosphor powder, the phosphor layer is a mixture of yellow phosphor and red phosphor, and epoxy glue is used to seal the periphery of the base. This kind of warm white LED light uses the blue light emitted by the blue chip to excite the phosphor to emit yellow light and red light, and then mixes it into warm white light with low color temperature. Due to the addition of red components in white light, and the low conversion efficiency of r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
Inventor 王建
Owner 王剑
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