CN1949507A - LED device with adjustable color temperature - Google Patents
LED device with adjustable color temperature Download PDFInfo
- Publication number
- CN1949507A CN1949507A CNA200510112780XA CN200510112780A CN1949507A CN 1949507 A CN1949507 A CN 1949507A CN A200510112780X A CNA200510112780X A CN A200510112780XA CN 200510112780 A CN200510112780 A CN 200510112780A CN 1949507 A CN1949507 A CN 1949507A
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Abstract
A light emitting diode device capable of adjusting color temperature is mainly characterized in that at least one red light emitting diode unit and at least one green light emitting diode unit are additionally provided besides a white light emitting diode device comprising a blue light emitting diode unit and a yellow fluorescent powder coating layer so as to change the color temperature of white light. The yellow phosphor coating layer may cover only the blue light-emitting diode unit, or may cover the red light-emitting diode unit and the green light-emitting diode unit additionally. In addition, the blue light emitting diode unit, the red light emitting diode unit and the green light emitting diode unit can be driven respectively to further improve the color temperature.
Description
Technical field
The present invention relates to a kind of light-emitting diode assembly, particularly a kind of light-emitting diode assembly of adjustable color temperature is used to improve the color rendering of emitted light.
Background technology
Light-emitting diode (LED, light emitting diode) is a kind of small-sized, solid state light emitter that luminous efficiency is high.Light-emitting diode is a semiconductor device, and its long service life, stability height are suitable as various light source, for example as display screen light source, backlight light source, and traffic lights, emergency exit lamp, lighting decoration controlled etc.
Because various purposes, the color of needed light-emitting diode also develops into various color from traditional red, green, blue.With the white light source is example, and a kind of prior art is to utilize a plurality of chip light emitting diodes as light source, with the luminescence component neighbor configuration of three kinds of colors of red, green, blue, and makes its luminous and diffusion colour mixture, to reach the purpose that produces white light.
Another kind of prior art be with a blue LED as light source, in the resin mold member of lining, add yellow fluorescent powder, utilize blue-light excited yellow fluorescent powder and produce sodium yellow, sodium yellow is again with there not being absorbed blue light mixed light to become white light.
Figure 1A is a kind of traditional white light emitting diode schematic representation of apparatus, described white light emitting diode device 30 comprises the blue light-emitting diode unit 320 that is arranged on the substrate 300, and covers the yellow fluorescent powder coating 326 on the blue light-emitting diode unit 320.Wherein the blue light that sent of blue light-emitting diode unit 320 can inspire gold-tinted after yellow fluorescent powder coating 326 partially absorbs.After gold-tinted and the unabsorbed blue light, can obtain white light, yet in this traditional white light emitting diode device 30, owing to have only two kinds of colors, so color rendering and bad.
Figure 1B is another kind of traditional white light emitting diode schematic representation of apparatus; described white light emitting diode device 30 comprises the blue light-emitting diode unit 320 that is arranged on the substrate 300; at least one red light-emitting diode unit 322 and at least one green light LED unit 324, and cover light transmission protective layer 330 on blue light-emitting diode unit 320, red light-emitting diode unit 322 and the green light LED unit 324.Blue light-emitting diode unit 320, red light-emitting diode unit 322 and green light LED unit 324 are connected to corresponding electrode 340,342 and 344 respectively, to be driven by corresponding power supply (not shown).Blue light-emitting diode unit 320, red light-emitting diode unit 322 and green light LED unit 324 can send blue light, ruddiness and green glow respectively after driving, to be mixed into white light.Yet in this light-emitting diode assembly 30, differ, therefore also be difficult for mixing out equal white light because different directions is photochromic.
Summary of the invention
Therefore an object of the present invention is to provide a kind of light-emitting diode assembly of adjustable color temperature, to improve the color rendering of emitted light.
To achieve these goals, the invention provides a kind of light-emitting diode assembly of adjustable color temperature, it mainly is outside the white light emitting diode device that comprises blue light-emitting diode unit and yellow fluorescent powder coating, additionally provide at least one red light-emitting diode unit and at least one green light LED unit, to change the white light colour temperature.Wherein the yellow fluorescent powder coating can only cover on the blue light-emitting diode unit, or additionally covers on red light-emitting diode unit and the green light LED unit.In addition, blue light-emitting diode unit, red light-emitting diode unit and green light LED unit can drive respectively, further to improve colour temperature.
Brief description of drawings
Figure 1A is a kind of traditional white light emitting diode schematic representation of apparatus;
Figure 1B is another kind of traditional white light emitting diode schematic representation of apparatus;
Fig. 2 A is the end view of the light-emitting diode assembly of adjustable color temperature according to a preferred embodiment of the present invention;
Fig. 2 B is the schematic diagram of the light-emitting diode assembly of adjustable color temperature according to a preferred embodiment of the present invention;
Fig. 3 is the schematic diagram of the light-emitting diode assembly of adjustable color temperature according to a further advantageous embodiment of the invention;
Fig. 4 A is the end view of the light-emitting diode assembly of adjustable color temperature according to a further advantageous embodiment of the invention;
Fig. 4 B is the end view according to the light-emitting diode assembly of the adjustable color temperature of another preferred embodiment of the present invention.
Embodiment
About technology contents of the present invention and detailed description, existing accompanying drawings is as follows:
Fig. 2 A is the end view of the light-emitting diode assembly 10 of adjustable color temperature according to a preferred embodiment of the present invention, this light-emitting diode assembly 10 mainly comprises substrate 100, be positioned at least one blue light-emitting diode unit 120, at least one red light-emitting diode unit 122 and at least one green light LED unit 124 on the substrate 100, and cover yellow fluorescent powder coating 126 on each light emitting diode, be positioned at substrate 100 belows and corresponding to the electrode 140,142 and 144 of described each light emitting diode.
Fig. 2 B is the schematic diagram of the light-emitting diode assembly 10 of adjustable color temperature according to a preferred embodiment of the present invention, wherein the anode of blue light-emitting diode unit 120, red light-emitting diode unit 122 and green light LED unit 124 is connected to electrode 140,142 and 144 respectively, and the negative electrode of blue light-emitting diode unit 120, red light-emitting diode unit 122 and green light LED unit 124 then is connected to common electrode 146.Power supply 20 provides electric current by common electrode 146 for blue light-emitting diode unit 120, red light-emitting diode unit 122 and green light LED unit 124.
After wherein the blue light that sent of blue light-emitting diode unit 120 partially absorbs via yellow fluorescent powder coating 126, can inspire gold-tinted.After gold-tinted and the unabsorbed blue light, can obtain white light.The luminous power of red light-emitting diode unit 122 and green light LED unit 124 for example can be 1/6～1/15 of blue light-emitting diode unit 120 luminous powers, to improve the colour temperature of white light less than blue light-emitting diode unit 120.In described preferred embodiment, yellow fluorescent powder coating 126 can be selected the not material of absorptive red light light emitting diode 122 ruddiness that sends and green light LED unit 124 green glow that sends.
Fig. 3 is the schematic diagram of the light-emitting diode assembly 10 of adjustable color temperature according to a further advantageous embodiment of the invention, wherein the blue light-emitting diode unit 120, the anode of red light-emitting diode unit 122 and green light LED unit 124 is connected to electrode 140 respectively, 142 and 144, and blue light-emitting diode unit 120, the negative electrode of red light-emitting diode unit 122 and green light LED unit 124 then is connected to electrode 140 ' respectively, 142 ' and 144 ', independent current source 20,22 and 24 are respectively blue light-emitting diode unit 120, red light-emitting diode unit 122 and green light LED unit 124 provide the setting electric current.Same, the blue light that blue light-emitting diode unit 120 is sent can inspire gold-tinted after yellow fluorescent powder coating 126 partially absorbs.After gold-tinted and the unabsorbed blue light, can obtain white light.The luminous power of red light-emitting diode unit 122 and green light LED unit 124 can pass through independently power supply 22,24 controls, thereby changes the colour temperature of white light.For example the power of red light-emitting diode unit 122 and green light LED unit 124 can be 1/6～1/15 of blue light-emitting diode unit 120 power, with the fine setting colour temperature.
Fig. 4 A and Fig. 4 B are respectively the end views according to the light-emitting diode assembly 10 of the adjustable color temperature of two other preferred embodiment of the present invention.Referring to Fig. 4 A; yellow fluorescent powder coating 126 can only cover on the blue light-emitting diode unit 120; and the surface of light-emitting diode assembly 10 is covered by a light transmission protective layer 130, and described light transmission protective layer 130 for example can be epoxy resin (Epoxy) light transmission protective layer 130.Perhaps; shown in Fig. 4 B; yellow fluorescent powder coating 126 can only cover on the blue light-emitting diode unit 120; and the surface of red light-emitting diode unit 122 and green light LED unit 124 is respectively by 132,134 coverings of light transmission protective layer, and described light transmission protective layer for example can be epoxy resin (Epoxy) light transmission protective layer.In addition, on the light-emitting diode assembly of adjustable color temperature of the present invention, can add a photic zone, so that the mixed light effect of each color light to be provided, and the light-emitting diode assembly of protecting this adjustable color temperature.
The above is the preferred embodiments of the present invention only, is not to be used for limiting the scope of the present invention.Every equal variation and modification of being done in the present patent application claim includes in claim of the present invention.
Claims (9)
1. the light-emitting diode assembly of an adjustable color temperature comprises:
Substrate;
Be positioned at least one blue light-emitting diode unit, at least one red light-emitting diode unit and at least one green light LED unit on the described substrate, and the yellow fluorescent powder coating;
Wherein, described yellow fluorescent powder coating is covered on the described blue light-emitting diode unit at least.
2. the light-emitting diode assembly of adjustable color temperature as claimed in claim 1, wherein said yellow fluorescent powder coating also is covered on described red light-emitting diode unit and the described green light LED unit.
3. the light-emitting diode assembly of adjustable color temperature as claimed in claim 1; wherein said yellow fluorescent powder coating only is covered on the described blue light-emitting diode unit, and described light-emitting diode assembly further comprises the light transmission protective layer that is covered on all described light emitting diodes.
4. the light-emitting diode assembly of adjustable color temperature as claimed in claim 3, wherein said light transmission protective layer is the epoxy resin light transmission protective layer.
5. the light-emitting diode assembly of adjustable color temperature as claimed in claim 1; wherein said yellow fluorescent powder coating only is covered on the described blue light-emitting diode unit; and described light-emitting diode assembly further comprises one deck light transmission protective layer at least, and described light transmission protective layer is covered on all described red light-emitting diode unit and the described green light LED unit.
6. the light-emitting diode assembly of adjustable color temperature as claimed in claim 5, wherein said light transmission protective layer is the epoxy resin light transmission protective layer.
7. the light-emitting diode assembly of adjustable color temperature as claimed in claim 1, further comprise power supply, described power supply provides electric current by common electrode for described blue light-emitting diode unit, described red light-emitting diode unit and described green light LED unit.
8. the light-emitting diode assembly of adjustable color temperature as claimed in claim 1, further comprise three independent current sources, described independent current source provides electric current by corresponding electrode for described blue light-emitting diode unit, described red light-emitting diode unit and described green light LED unit respectively.
9. the light-emitting diode assembly of adjustable color temperature as claimed in claim 8, the power of wherein said red light-emitting diode unit and described green light LED unit is 1/6～1/15 of described blue light-emitting diode cell power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510112780XA CN1949507A (en) | 2005-10-12 | 2005-10-12 | LED device with adjustable color temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510112780XA CN1949507A (en) | 2005-10-12 | 2005-10-12 | LED device with adjustable color temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1949507A true CN1949507A (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200510112780XA Pending CN1949507A (en) | 2005-10-12 | 2005-10-12 | LED device with adjustable color temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1949507A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009121217A1 (en) * | 2008-03-31 | 2009-10-08 | 鹤山丽得电子实业有限公司 | A led lighting fitting |
| CN102217065A (en) * | 2008-11-13 | 2011-10-12 | 欧司朗光电半导体有限公司 | Optoelectronic component |
| CN102261582A (en) * | 2010-05-24 | 2011-11-30 | 台达电子工业股份有限公司 | Single-packaged light-emitting diode light source for improving color rendering of output color |
| US8109650B2 (en) | 2008-05-21 | 2012-02-07 | Au Optronics Corporation | Illuminant system using high color temperature light emitting diode and manufacture method thereof |
| CN102376697A (en) * | 2010-08-27 | 2012-03-14 | 苏州科医世凯半导体技术有限责任公司 | High color rendering white light LED (Light Emitting Diode) module |
| CN102588805A (en) * | 2012-03-20 | 2012-07-18 | 佛山市国星光电股份有限公司 | Color temperature adjustable LED (light emitting diode) device and color temperature adjustable lamp |
| CN105135234A (en) * | 2015-07-24 | 2015-12-09 | 中国水产科学研究院黄海水产研究所 | Industrial aquaculture lighting system promoting growth of turbot juvenile fishes and increasing bait utilization rate and application of industrial aquaculture lighting system |
| CN106356432A (en) * | 2016-11-23 | 2017-01-25 | 中山市富利迪光电科技有限公司 | A light source with adjustable color temperature and packaging method |
-
2005
- 2005-10-12 CN CNA200510112780XA patent/CN1949507A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009121217A1 (en) * | 2008-03-31 | 2009-10-08 | 鹤山丽得电子实业有限公司 | A led lighting fitting |
| US8109650B2 (en) | 2008-05-21 | 2012-02-07 | Au Optronics Corporation | Illuminant system using high color temperature light emitting diode and manufacture method thereof |
| CN102217065A (en) * | 2008-11-13 | 2011-10-12 | 欧司朗光电半导体有限公司 | Optoelectronic component |
| US8558259B2 (en) | 2008-11-13 | 2013-10-15 | Osram Opto Semiconductors Gmbh | Optoelectronic component having a dome-like conversion element |
| CN102217065B (en) * | 2008-11-13 | 2014-07-02 | 欧司朗光电半导体有限公司 | Optoelectronic component |
| CN102261582A (en) * | 2010-05-24 | 2011-11-30 | 台达电子工业股份有限公司 | Single-packaged light-emitting diode light source for improving color rendering of output color |
| CN102376697A (en) * | 2010-08-27 | 2012-03-14 | 苏州科医世凯半导体技术有限责任公司 | High color rendering white light LED (Light Emitting Diode) module |
| CN102376697B (en) * | 2010-08-27 | 2015-06-24 | 苏州科医世凯半导体技术有限责任公司 | High color rendering white light LED (Light Emitting Diode) module |
| CN102588805A (en) * | 2012-03-20 | 2012-07-18 | 佛山市国星光电股份有限公司 | Color temperature adjustable LED (light emitting diode) device and color temperature adjustable lamp |
| CN105135234A (en) * | 2015-07-24 | 2015-12-09 | 中国水产科学研究院黄海水产研究所 | Industrial aquaculture lighting system promoting growth of turbot juvenile fishes and increasing bait utilization rate and application of industrial aquaculture lighting system |
| CN105135234B (en) * | 2015-07-24 | 2018-03-02 | 中国水产科学研究院黄海水产研究所 | A kind of industrial aquaculture illuminator and its application for promoting young turbot growth and improving bait utilization |
| CN106356432A (en) * | 2016-11-23 | 2017-01-25 | 中山市富利迪光电科技有限公司 | A light source with adjustable color temperature and packaging method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |