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Light emitting diode lighting device

A technology of light-emitting diodes and lighting devices, which is applied to lighting devices, components of lighting devices, lighting and heating equipment, etc., and can solve problems such as reduced luminous efficiency of devices, poor color rendering, and low luminous efficiency of white light sources

Inactive Publication Date: 2013-01-02
ZHANJING TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of light-emitting diode chips to excite phosphors will reduce the luminous efficiency of the light source, and different phosphors have different effects on luminous efficiency. Generally, the higher the color rendering of the white light source, the lower the luminous efficiency.
For example, see figure 1 , the white light produced by using blue LED chip to excite yellow phosphor doped with yttrium aluminum garnet (YAG) can obtain higher luminous flux and higher luminous efficiency, but its color rendering will be relatively poor; using blue LED chip to excite red The white light produced by the green phosphor has higher color rendering due to the increase of the red component in the spectrum, but due to the lower conversion efficiency of the red phosphor, the luminous efficiency of the entire device will be reduced

Method used

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] see figure 2 as well as image 3 , a light emitting diode lighting device 100 provided in a preferred embodiment of the present invention includes a base 10 and a plurality of first white light sources 20 and a plurality of second white light sources 30 disposed in the base.

[0016] The base 10 includes a top surface 11 and a bottom surface 12. The base 10 is opened from the top surface 11 along the direction of the bottom surface 12 to form an accommodating cup 13. The inner surface of the accommodating cup 13 is an inclined surface, and the inclined surface starts from the top surface. 11 extends towards the bottom surface 12 and inclines inward along the radial direction of the containing cup 13, so that the entire containing cup 13 is wide at the top and narrow at the bottom, forming a funnel shape. A plurality of first white light sources 20 a...

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PUM

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Abstract

A light emitting diode lighting device comprises at least one first white light source and at least one second white light source. The luminous efficiency and the color rendering value of each first white light source are V1 and C1 respectively, and the luminous efficiency and the color rendering value of each second white light source are V2 and C2 respectively, wherein V1 is lower than V2, and C1 is smaller than C2. Light emitted by the light emitting diode lighting device is generated after white light emitted by the first white light sources and white light emitted by the second white light sources are mixed. The light generated by the first white light sources higher in color rendering and the light generated by the second white light sources higher in luminous efficiency are mixed, and the white light generated after mixing has higher luminous efficiency as well as higher color rendering.

Description

technical field [0001] The invention relates to a lighting device, in particular to a light emitting diode lighting device. Background technique [0002] Light-emitting diodes are energy-saving, environmentally friendly, and long-life solid-state light sources. Therefore, the research on light-emitting diode technology has been very active in the past ten years, and light-emitting diodes are gradually replacing traditional light sources such as fluorescent lamps and incandescent lamps. [0003] In the prior art, the white light source is usually formed by exciting phosphor powder with a light-emitting diode chip, and the use of different phosphor powder will form a white light source with different color rendering properties. However, the use of light-emitting diode chips to excite the phosphor will reduce the luminous efficiency of the light source, and different phosphors have different effects on the luminous efficiency. Generally, the higher the color rendering of the wh...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21V19/00F21V7/00F21Y101/02
Inventor 杨家强曾文良
Owner ZHANJING TECH SHENZHEN
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