Near ultraviolet or ultraviolet excited LED light-emitting device

A light-emitting device, near-ultraviolet technology, applied in the direction of light-emitting materials, electrical components, electrical solid devices, etc., can solve the problems of light decay, low color rendering index of packaged products, narrow half-wave width of emission spectrum, etc., and achieve high energy conversion efficiency. , the effect of good color temperature uniformity
CN103779346AActive Publication Date: 2014-05-07北京宇极芯光光电技术有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京宇极芯光光电技术有限公司
Publication Date
2014-05-07

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Abstract

The invention relates to a near ultraviolet or ultraviolet excited LED light-emitting device which is composed of a packaging substrate, a near ultraviolet or ultraviolet LED chip and mixed fluorescent powder glue which can be used to effectively absorb light emitted by the LED chip and emit red, green and blue light. The light-emitting peak wavelength of the LED chip is in the range from 380nm to 420nm. The red fluorescent powder is the CaAlSi(ON)3: Eu system. The green fluorescent powder is the SiAlON: Eu system. The blue fluorescent powder is the (Sr, Ba)10(PO4)6Cl2: Eu system. Most of the light generated by the near ultraviolet or ultraviolet LED chip is used for exciting the fluorescent powder, so the color purity of the light only depends on the color purity of the fluorescent powder, and a high color rendering index CRI which is greater than 95 can be obtained, wherein color rendering indexes from R1 to R15 are all greater than 90. According to the invention, the made white LED device has advantages of good spectrum continuity, natural light proximity, that is the solar spectrum, good color temperature uniformity and no light spot.
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Description

technical field

[0001] The invention relates to the technical field of LEDs, in particular to an LED lighting device excited by near ultraviolet or ultraviolet light. Background technique

[0002] In today's increasingly tense energy environment, compared with traditional fluorescent lamps and incandescent lamps, white LEDs, as a new type of lighting source, have significant advantages such as energy saving, environmental protection, short response time, and long life. At present, the LED industry is developing rapidly, the luminous efficiency is increasing year by year, and the price is decreasing year by year. White LEDs are gradually replacing fluorescent lamps and incandescent lamps and entering the home lighting market. There are five main methods of making white LEDs.

[0003] 1. Use red, green, blue chips or multiple devices to emit light and mix colors into white light, or use blue + yellow dual chips to mix colors to produce white light through the principle of com...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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