CN102900973A - White light emitting diode (LED) light source - Google Patents
White light emitting diode (LED) light source Download PDFInfo
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- CN102900973A CN102900973A CN2012103302292A CN201210330229A CN102900973A CN 102900973 A CN102900973 A CN 102900973A CN 2012103302292 A CN2012103302292 A CN 2012103302292A CN 201210330229 A CN201210330229 A CN 201210330229A CN 102900973 A CN102900973 A CN 102900973A
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Abstract
The invention discloses a white light emitting diode (LED) light source, which comprises one or more LED chip sets and a surface dispersion plate, wherein each LED chip set consists of one or more high-light-effect and low-color-rendering white LED chips and one or more low-light-effect and high-color-rendering white LED chips which are mixed according to a proper proportion and a proper structure to form uniform distribution, so that the overall light effect and the color rendering property of the light source can be changed. After the surface of the surface dispersion plate is treated, the light source can emit light uniformly. A test shows that by mixing in a proper proportion, the light effect of the mixed light source is close to that of a light source with high light effect, and the color rendering property of the mixed light source is close to that of the light source with high color rendering property.
Description
Technical field
The present invention relates to a kind of white LED light source, belong to lighting technical field.
Background technology
Along with the maturation of light emitting diode (LED) chip and encapsulation technology, white light LEDs progressively is subject to people's favor as the general lighting light source.It has the series of advantages such as low pressure, low-power consumption, high reliability, long-life, has been widely used in the general lighting field, is expected to progressively replace present all kinds of fluorescent lamp and incandescent lamp.Yet light efficiency and the colour rendering of white LED light source exist contradiction, and people have often lost colour rendering for the light efficiency that improves white LED light source, have perhaps sacrificed light efficiency in order to improve colour rendering, so all are unfavorable for the development of white LED light source.
At present, the light efficiency that how to improve white LED light source is the study hotspot of LED illumination industry, comprise the technology of the doping of LED wafer and crystallization technique, triphosphor Fluorescent Powder and encapsulation technology etc., list is from the light efficiency of light source now, and White-light LED illumination can replace traditional fluorescent illumination light fixture.
Industry mainly concentrates in the single white light LED part about the research that improves the white light LEDs colour rendering, improves colour rendering by the improvement to fluorescent RE powder and LED wafer technologies.To changing the control of LED wafer, because the quantum efficiency of LED modules with different colors chip is different, also different with the variation of temperature and drive current separately, and decay in time is also different, so the colourity of output white light is unstable in single LEDs chip.In order to make it stable, need to add respectively feedback circuit to three kinds of colors and compensate, will cause the complicated of encapsulating structure and circuit like this, actual manufacturing cost is very high, is difficult at present carry out commerce and uses.
Summary of the invention
Technical problem to be solved by this invention provides a kind of white LED light source, this light source is based on present led chip and encapsulation technology, utilize the white light LED part that has encapsulated, by the white light LED part mixing use with different colour rendering indexs and different light efficiencies, when keeping the high light effect, can significantly improve the colour rendering of white LED light source.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of white LED light source, comprise one or more White-light LED chip groups, described White-light LED chip group is made of the White-light LED chip of the low colour rendering of one or more high light efficiencies and the White-light LED chip of one or more low light efficiency high-color renderings, the White-light LED chip of the low colour rendering of described high light efficiency and the White-light LED chip of low light efficiency high-color rendering are in same plane, and form evenly distribution.
Two kinds of dissimilar White-light LED chips are carried out a certain proportion of combination, form hybrid light source.A kind of White-light LED chip wherein is the low colour rendering index of high light efficiency, and another kind of White-light LED chip is low light efficiency high color rendering index (CRI), and two kinds of chips are carried out proper proportion and the mixing of appropriate configuration ground, can change whole light efficiency and the colour rendering of output light.Test shows that the mixing of proper proportion can make the light efficiency of hybrid light source close to the light source of high light efficiency, and colour rendering is close to the light source of high-color rendering.
According to result of the test, distance L between the lighting angle α of the White-light LED chip of the low colour rendering of described high light efficiency, the lighting angle β of low light efficiency White LED with high color rendering property chip, the two kinds of chips, plane, led chip place are to L/D≤tan (α/2)+tan (β/2) is when concerning meeting between the distance B of diffuser plate, and mixed effect is the most remarkable.The lighting angle of led chip satisfies 0 °＜α＜180 ° in theory, with regard to present LED encapsulation technology, is used for the led chip encapsulation angle of illumination generally between 30 °-135 °.
According to result of the test, after two kinds of different types of chips form hybrid light source, total light flux approximates the luminous flux sum that all chips send, so comprehensive light efficiency depends on the ratio of high light efficiency chip, colour rendering then is subjected to the combined influence of two kinds of chips, wherein the high-color rendering chip has appreciable impact to the colour rendering of hybrid light source, and the White-light LED chip of the low colour rendering of described high light efficiency and the White-light LED chip ratio of low light efficiency high-color rendering are 1:1-12.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is planar light source of the present invention with the structural representation of White-light LED chip group.
Fig. 2 is cast light source of the present invention with the structural representation of White-light LED chip group.
Fig. 3 is sphere shape light of the present invention with the structural representation of White-light LED chip group.
Fig. 4 is the schematic diagram of the distance relation between White-light LED chip group and the diffuser plate.
Fig. 5 is sphere shape light product schematic diagram of the present invention.
The specific embodiment
Shown in Figure 1 is the plane White-light LED chip group that adopts technical scheme of the present invention to design, mainly formed by two kinds of different White-light LED chips, wherein a kind of is the White-light LED chip A of the low colour rendering of high light efficiency, light efficiency is 110lm/W, colour rendering index Ra is 75, another kind of White-light LED chip B for low light efficiency high-color rendering, light efficiency is 92lm/W, colour rendering index Ra is 85, ratio according to 1:4 is suitably mixed two kinds of light sources, the planar LED chipset that forms matrix-style, actual test uses the light source output light efficiency of this led chip group can reach 107lm/W, colour rendering index Ra is 82, can improve the colour rendering of hybrid light source in the situation of substantially keeping the high light effect, satisfies the colour rendering requirement of general lighting.
Shown in Figure 2 is the cast White-light LED chip group that adopts technical scheme of the present invention to design, mainly formed by two kinds of different White-light LED chips, wherein a kind of high light efficiency hangs down the White-light LED chip of colour rendering, light efficiency is 110lm/W, colour rendering index Ra is 75, another kind of White-light LED chip for low light efficiency high-color rendering, light efficiency is 92lm/W, colour rendering index Ra is 85, according to the ratio of 1:3 two kinds of chips is suitably mixed, and is welded on the printed substrate according to schematic structure by SMD technique, become the led chip group, can be installed in the light fixture of tubular-shaped structures, and on the surface diffuser plate is installed, form the LED fluorescent lamp.The output light efficiency of actual this light source of test can reach 105lm/W, and colour rendering index Ra is 84, is suitably sacrificing in the situation of light efficiency, has significantly improved the colour rendering of hybrid light source.
Shown in Figure 3 is the circular White-light LED chip group that adopts technical scheme of the present invention to design, mainly formed by two kinds of different White-light LED chips, wherein a kind of high light efficiency hangs down the White-light LED chip of colour rendering, light efficiency is 110lm/W, colour rendering index Ra is 70, another kind of White-light LED chip for low light efficiency high-color rendering, light efficiency is 92lm/W, colour rendering index Ra is 85, ratio according to 1:12 is mixed two kinds of light sources, wherein the chip of low light efficiency high-color rendering is positioned at the center of hybrid light source, around the chip of the low colour rendering of high light efficiency is uniformly distributed in, form the round LED chipset, LED Down lamp or bulb type LED lamp are made by forming the mixed white light led light source behind the diffuser plate in the surface.The output light efficiency of actual this light source of test is 110lm/W, and colour rendering index Ra is 78, can in the situation of substantially keeping high light efficiency, effectively improve the colour rendering of hybrid light source.
Fig. 4 is the schematic diagram of distance between the explanation spacing of two kinds of White-light LED chips and chip and the diffuser plate, the lighting angle of the White-light LED chip A of the low colour rendering of high light efficiency is α, the lighting angle of the White-light LED chip B of low light efficiency high-color rendering is β, two kinds of White-light LED chips are in same plane, this plane and diffuser plate are parallel relation, and there is following relation in the distance L between the distance B between the diffuser plate and the two kinds of chips:
L/D≤tan(α/2)+tan(β/2)。
Shown in Figure 5 is the circular LED light source that adopts technical scheme of the present invention to design, comprise mixed white light led chip group 1, surface diffusion sheet 2 and structural member 3, described led chip group forms be evenly distributed on the White-light LED chip of 1 low light efficiency high-color rendering by the White-light LED chip of the low colour rendering of 12 high light efficiencies around, the lighting angle of two kinds of White-light LED chips is 120 °, the spacing of chip and center dies is 16mm on every side, described surface diffusion sheet 2 is 15mm to the distance on White-light LED chip surface, the light that described White-light LED chip group 1 is sent sees through described surface diffusion sheet 2 and emits rear formation even intensity, the light that colour rendering is consistent, described mixed white light led chip group 1 and surface diffusion sheet 2 are fixed on the structural member 3, and described structural member 3 also provides heat radiation for mixed white light led chip group 1 simultaneously.
Above-described embodiment does not limit the present invention in any way, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops in protection scope of the present invention.
Claims (4)
1. a white LED light source comprises one or more led chip groups and diffuser plate, it is characterized in that: the light that described led chip group is sent forms even intensity, light that colour rendering is consistent after by diffuser plate.
2. white LED light source according to claim 1, it is characterized in that: described led chip group is made of the White-light LED chip of the low colour rendering of one or more high light efficiencies and the White-light LED chip of one or more low light efficiency high-color renderings, the White-light LED chip of the low colour rendering of described high light efficiency and the White-light LED chip of low light efficiency high-color rendering are in same plane, and form evenly distribution.
3. white LED light source according to claim 1, it is characterized in that: the distance L between the lighting angle α of the White-light LED chip of the low colour rendering of described high light efficiency, the lighting angle β of low light efficiency White LED with high color rendering property chip, the two kinds of chips, plane, led chip place are to the distance B correlation of diffuser plate, L/D≤tan (α/2)+tan (β/2).
4. White-light LED chip group according to claim 1 is characterized in that: the White-light LED chip of the low colour rendering of described high light efficiency and the White-light LED chip ratio of low light efficiency high-color rendering are 1:1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103302292A CN102900973A (en) | 2012-09-10 | 2012-09-10 | White light emitting diode (LED) light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103302292A CN102900973A (en) | 2012-09-10 | 2012-09-10 | White light emitting diode (LED) light source |
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| Publication Number | Publication Date |
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| CN102900973A true CN102900973A (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103302292A Pending CN102900973A (en) | 2012-09-10 | 2012-09-10 | White light emitting diode (LED) light source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115930173A (en) * | 2023-01-10 | 2023-04-07 | 硅能光电半导体(广州)有限公司 | Petal-shaped LED lamp bead and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06349451A (en) * | 1993-06-03 | 1994-12-22 | Fujitsu Ltd | Light source and liquid crystal display using it |
| EP1215735A1 (en) * | 2000-12-13 | 2002-06-19 | Chao-Chin Yeh | Improved structure of lamp |
| CN2874222Y (en) * | 2005-08-12 | 2007-02-28 | 冯北强 | Decoration lamp strip |
| CN102011970A (en) * | 2010-10-22 | 2011-04-13 | 华南理工大学 | High-power LED panel lamp for metro lighting |
| CN102434858A (en) * | 2011-12-29 | 2012-05-02 | 深圳市瑞丰光电子股份有限公司 | Circuit board and bulb lamp |
| CN203013719U (en) * | 2012-09-10 | 2013-06-19 | 常熟卓辉光电科技有限公司 | White-light LED light source |
-
2012
- 2012-09-10 CN CN2012103302292A patent/CN102900973A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06349451A (en) * | 1993-06-03 | 1994-12-22 | Fujitsu Ltd | Light source and liquid crystal display using it |
| EP1215735A1 (en) * | 2000-12-13 | 2002-06-19 | Chao-Chin Yeh | Improved structure of lamp |
| CN2874222Y (en) * | 2005-08-12 | 2007-02-28 | 冯北强 | Decoration lamp strip |
| CN102011970A (en) * | 2010-10-22 | 2011-04-13 | 华南理工大学 | High-power LED panel lamp for metro lighting |
| CN102434858A (en) * | 2011-12-29 | 2012-05-02 | 深圳市瑞丰光电子股份有限公司 | Circuit board and bulb lamp |
| CN203013719U (en) * | 2012-09-10 | 2013-06-19 | 常熟卓辉光电科技有限公司 | White-light LED light source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115930173A (en) * | 2023-01-10 | 2023-04-07 | 硅能光电半导体(广州)有限公司 | Petal-shaped LED lamp bead and control method thereof |
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Application publication date: 20130130 |