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LED white light source with biologically relevant emission spectrum

A technology of LED light source and white light source, applied in the field of white light source, can solve problems such as drop

Inactive Publication Date: 2021-10-22
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The disadvantage of the LED lamp according to patent US8847478 B2 is also the presence in the spectrum of a phototoxic blue radiation peak in the 450-470nm range and a drop in the 480nm blue region

Method used

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  • LED white light source with biologically relevant emission spectrum
  • LED white light source with biologically relevant emission spectrum
  • LED white light source with biologically relevant emission spectrum

Examples

Experimental program
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Effect test

example 1

[0088] LED light sources with a biologically sufficient white radiation spectrum for stand-alone luminaires are made using SMD LEDs manufactured by Lumileds: 6 white LEDs of type GTM30302 and one blue LED type L135-B475003500001 glued with a 50 micron thick Photoluminescent film. The photoluminescent film is based on Dow Corning optical organosilicon compound QE 6636, and Lu2.85Ce0.15Al4Ga1O12 photoluminescent phosphor is added at a ratio of 1:1.5. The films are bonded with the same two-component compound OE 6636, which has high transparency in the visible range of the spectrum. Steady-state luminous flux is 200 lumens when powered by three AA batteries in series, CRI 92.6%, TC2354K.

example 2

[0090] LED light sources with a biologically sufficient white radiation spectrum for stand-alone luminaires with LED configurations such as image 3 As shown, the spectrum as Figure 4 Shown, made using SMD LEDs manufactured by Lumileds: 6 white GTM30302 types covered with a 100 μm thick photoluminescent film, and one blue LED of type L135-B475003500001 with a 150 μm thick glued photoluminescent film. The photoluminescent film is based on Dow Corning optical organosilicon compound OE 6636, and Lu2.85Ce0.15Al4Ga1O12 photoluminescent phosphor is added at a ratio of 1:1.5. The films are bonded with the same two-component compound OE 6636, which has high transparency in the visible range of the spectrum. The spectra of the phosphors used are shown in figure 1 . 7 (λp=528nm). When three AA batteries are connected in series, the steady-state luminous flux is 105lm, CRI92.6%, TC2354K.

example 3

[0092] LED retrofit lamps with a biologically sufficient white light spectrum (with a spectrum such as Figure 10 shown) was made using SMD LEDs from Lumileds: 12 white type L130-3090003000W21 and three blue LED type L135-B475003500001. The output surface of the blue LED is covered with a photoluminescent film with a thickness of 130 μm, which is based on the optical two-component organosilicon compound QE 6636 manufactured by Dow Corning, and added photoluminescent phosphor Y2.79Ce0.12Lu0.09Al3. The ratio of 1Ga1.9O12 is 1:1. The film is laminated with OE 6636. The steady-state luminous flux of the lamp is 800lm, the power consumption is 8.5W, the power factor is 0.45, the light output is 94.12lm / W, the CRI is 93%, and the TC is 3000K.

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Abstract

The invention relates to electrical and electronic engineering, and more particularly to light sources based on semiconducting light-emitting diodes (LEDs), and even more particularly to white light sources based on LEDs with conversion phosphors. An LED white light source with a biologically relevant emission spectrum comprises at least two white LEDs disposed on a thermally conductive printed circuit board with electrical terminals for connecting the LEDs to an electric power supply, and a semi-transparent cover arranged over the printed circuit board, wherein each white LED contains, in a light-reflecting housing, at least one indigo-emitting chip encapsulated with a polymer compound containing its own phosphor or mixture of phosphors, and the thermally conductive printed circuit board has at least one blue-emitting LED additionally disposed thereon which is covered with a composite photoluminescent film containing a phosphor in a transparent base. The technical result lies in reducing the harmful effect of emission on the human body and increasing the reliability and efficiency of the light source.

Description

technical field [0001] The present invention relates to electrical and electronic engineering, more particularly to light sources based on semiconductor light emitting diodes (LEDs), and even more particularly to white light sources based on LEDs with converted photoluminescent bodies. Background technique [0002] Solid-state lighting technology is conquering the lighting market with advances in high-efficiency LEDs, especially nitride (InGaN) LEDs, and the highest luminous efficacy of any known white light source. LED solutions are widely used in lighting applications such as linear and street luminaires, where the luminaires are relatively large and highly heated LEDs can be distributed to facilitate efficient heat dissipation. The development of LEDs to replace traditional incandescent lamps and small-sized halogen lamps with high luminous flux is one of the most urgent scientific and technological problems in modern times in view of the great prospect of solving energy-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V9/40H01L33/44F21V9/32C09K11/80
CPCF21K9/232F21K9/64H01L33/507H01L33/502H01L33/64F21V9/32H01L33/44
Inventor 弗拉基米尔·尼古拉耶维奇·乌拉修克