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Lighting system

A lighting system and light-emitting diode technology, applied in the field of lighting systems, can solve the problems of unobtainable, lacking, and unable to always produce the desired color effect, etc., and achieve the effect of small quantum deficiency and easy series setting

Inactive Publication Date: 2005-11-16
PHILIPS LIGHTING HOLDING BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of such lighting systems combining three LEDs as primary color light sources is that the desired color effects cannot always be produced, possibly due to the unavailability or lack of LEDs with the maximum spectrum in the desired spectral range which are at the same time quite energy efficient

Method used

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Examples

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Embodiment Construction

[0032] Figure 1A is a partial cutaway side view of one embodiment of a lighting system according to the first aspect of the invention, the lighting system 1 comprising drive electronics housing a light emitting diode (LED) ( Figure 1A Not shown in) and the shell 2 of the screen 3. In this example, the housing is equipped with a so-called Edison type 27 (E27) lamp cap 4 with known mechanical and electrical contact means. On the side of the lighting system 1 facing away from the lamp cap 4, there is a bracket 5 on which a large number of LEDs 6, 6'... 7, 7',... 8, 8'... are mounted. LEDs 6, 6'... 7, 7', ... include blue LEDs 6, 6' ... (maximum spectral emission in the wavelength range 430-490 nm) and red LEDs 7, 7', .. (maximum spectral emission emitting in the wavelength range of 590-630 nm), the LEDs 6, 6'...7, 7',...are arranged so that the light they emit is directed towards the screen 3. Figure 1B shows very schematically an example of a schematic circular arrangement of...

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PUM

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Abstract

A lighting system includes at least two light-emitting diodes each emitting, in operation, visible light in a preselected wavelength range. A converter converts part of the visible light emitted by one of the diodes into visible light in a further wavelength range so as to optimize the color rendition of the lighting system. The diodes include a blue light-emitting diode and a red light-emitting diode. Further, the converter includes a luminescent material for converting a portion of the light emitted by the blue light-emitting diode into green light.

Description

technical field [0001] The invention relates to a lighting system comprising at least two light-emitting diodes, each of said light-emitting diodes operating to emit visible light within a predetermined wavelength range. [0002] Light emitting diode (LED) based lighting systems are used as white light sources for general lighting applications. Background technique [0003] Lighting systems of the kind mentioned in the opening paragraph are already known. In recent years, GaN-based blue and green LEDs have been effectively developed in addition to GaP-based red LEDs. In order to manufacture a white light source, in principle three kinds of LEDs, blue, green and red LEDs are required as primary color light sources. [0004] A disadvantage of such lighting systems combining three LEDs as primary color light sources is that the desired color effects cannot always be produced, possibly due to the unavailability or lack of LEDs with a maximum spectrum in the desired spectral ra...

Claims

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Application Information

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IPC IPC(8): F21S8/04C09K11/08C09K11/56C09K11/59F21K99/00F21V7/22F21Y101/02H01L33/50H05B44/00
CPCF21V7/22Y10S362/80H01L33/50C09K11/642C09K11/7734F21K9/137H01L2924/0002F21K9/56F21Y2101/02F21V9/16C09K11/7718Y02B20/383H05B33/0821F21K9/00H05B33/0857H01L25/0753F21Y2111/001C09K11/584F21K9/233F21K9/64F21Y2115/10F21Y2107/00F21V9/30H05B45/40H05B45/20H05B45/00F21V7/24F21V13/08Y02B20/30C09K11/77342H01L2924/00
Inventor H·F·贝尔纳W·布赛特T·于斯特尔H·尼科尔C·R·隆达G·哈伯斯
Owner PHILIPS LIGHTING HOLDING BV