CN102353015A - Light-emitting diode (LED) excited surface light source device and method - Google Patents
Light-emitting diode (LED) excited surface light source device and method Download PDFInfo
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- CN102353015A CN102353015A CN2011102020383A CN201110202038A CN102353015A CN 102353015 A CN102353015 A CN 102353015A CN 2011102020383 A CN2011102020383 A CN 2011102020383A CN 201110202038 A CN201110202038 A CN 201110202038A CN 102353015 A CN102353015 A CN 102353015A
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Abstract
The invention provides a light-emitting diode (LED) excited surface light source device and an LED excited surface light source method. The device comprises an LED light source serving as an excitation source, a fluorescent plate excited by the LED light source to emit light, and a diffusion plate positioned above the fluorescent plate, wherein the LED light source comprises a plurality of light sources arranged on a substrate. The LED light source is taken as the excitation source, so waves with certain wavelength, which are emitted by the LED light source, excite the fluorescent plate to emit light, and the excited light passes through the diffusion plate to serve as liquid crystal backlight finally.
Description
Technical field
The present invention relates to a kind of led light source, particularly a kind of LED excites the device and method of area source.
Background technology
Present stage, the application technology of LED has spread all over the world, and all trades and professions are all being used the LED technology.Little screen to the mobile phone consumer electronics arrives automobile tail light greatly, and big lighting apparatus, low side ordinary individual's lighting apparatus arranged, high-end have a LED LCD TV.The advantage of LED is very obvious, and its advantage also is that everyone knows about it, yet itself also has inevitable inferior position and shortcoming.At first LED is the current mode components and parts; Therefore the instability of voltage can have very big influence to the performance of LED; Can be solved basically by the constant-current source chip for driving in this point; The luminous energy that another unavoidable drawback is exactly LED is transformed by electric energy and comes; Wherein electric energy some be converted into luminous energy; Another part is converted into heat energy; And the proportion that heat energy occupies is greater; If but heat can not shed timely; Life-span and performance to LED has very big influence so, and the performance degradation along with LED has just lost its original advantage in the course of time.
Usually application mode is to use support and packaging plastic that led chip and LED fluorescent material are encapsulated into together at present, as a LED particle, then the LED particle is done as a whole the use.The benefit of doing like this is the neat standard of LED, is easy to use.But also cause the LED area of dissipation little simultaneously, the problem that use cost is high.The present invention proposes a kind of new method, solves heat radiation and expensive problem in the led chip use.
Summary of the invention
The invention provides the device and method that a kind of LED excites area source, alleviated the heat radiation and the expensive problem of led chip.
The technical scheme that the present invention adopted is: a kind of LED excites the device of area source; Comprise led light source as excitaton source, by the fluorescent plate of led light source institute stimulated luminescence; And the diffuser plate that is positioned at the fluorescent plate top, wherein, said led light source comprises a plurality of led light sources that are arranged on the substrate.
The difference of the main crest wavelength of said led light source and the wavelength that is stimulated of fluorescent plate is less than 3nm;
Said led light source is integrated to be encapsulated on the substrate;
Said substrate is PCB substrate, aluminium base, copper base or ceramic substrate;
The reflector that said LED excites the device of area source further to comprise to be positioned at the LGP under the fluorescent plate and is positioned at the LGP below; Said led light source is positioned at the end positions of LGP, and said reflector upwards forms from himself two ends and surrounds structure and led light source is surrounded;
Said diffuser plate comprises two-layer, between this two-layer diffuser plate, is provided with prism plate;
Said led light source be positioned at fluorescent plate under, below led light source, further be provided with reflector.
The method that the present invention also provides a kind of LED to excite area source, as excitaton source, the difference of the main crest wavelength of said led light source and the wavelength that is stimulated of fluorescent plate is less than 3nm, and is luminous with led light source fluorescence excitation plate with led light source.
LED of the present invention excites the device and method of area source to have the following advantages at least: led light source of the present invention is an excitaton source; It sends the light of certain wavelength; After the illumination of this wavelength is mapped on the fluorescent plate; The fluorescence excitation plate is luminous, fluorescent plate be excited and the light that sends through diffuser plate as the liquid crystal backlight.Led chip of the present invention directly uses, and has alleviated the heat radiation and the expensive problem of led chip.
Description of drawings
Fig. 1 is the inventive method flow chart;
Fig. 2 is a side entrance back origin system structure chart;
Fig. 3 is the direct-light-type backlight system construction drawing;
Fig. 4 is the illumination light source structure chart.
The specific embodiment
See also shown in Figure 1, the present invention with LED as an excitaton source rather than light source, the fluorescent plate that utilizes LED to excite to produce, thus produce area source, again area source is used for illumination or LCD backlight.Be encapsulated on the substrate led chip is integrated; Promptly do not need support and bowl cup; The plurality of LEDs chip directly is encapsulated on the PCB substrate; The PCB substrate can be common PCB substrate, aluminium base, copper base or ceramic substrate; With encapsulant led chip is sealed then, prevent that outside steam and air from corroding.The wavelength difference of the main crest that is stimulated of main crest and fluorescent plate that it should be noted that LED is smaller or equal to 3nm.
Below in conjunction with embodiment the inventive method is described in detail:
Be the structure chart that New LED excites the area source method in side-light type back light, to use as shown in Figure 2.Whole device comprises led light source 1, reflector 7, LGP 5, fluorescent plate 3, diffuser plate 8 and prism plate 9; Its placement order as shown in the figure; Said LGP 5, fluorescent plate 3, diffuser plate 8 and prism plate 9 bottom-up being arranged in order; Said led light source 1 is positioned at LGP 5 two ends, and said reflector 7 is positioned at LGP 5 belows and upwards forms semi-circular structure so that led light source 1 is surrounded from two ends.Its course of work is following: led light source 1 sends the light of certain wavelength as excitaton source, through reflector 7 and LGP 5, arrives fluorescent plate 3.The main crest wavelength difference of the light that be stimulated wavelength and the led light source 1 of said fluorescent plate 3 sends is suitable basically less than 3nm, and therefore, led light source 1 is luminous with fluorescence excitation plate 3.The light that excites is through diffuser plate 8 and prism plate 9, as the liquid crystal backlight.
Embodiment 2
As shown in Figure 3, be the structure chart that New LED excites the area source method in direct-light-type backlight, to use.Whole device comprises led light source 1 ', reflector 7 ', fluorescent plate 3 ', diffuser plate 8 ' and prism plate 9 '; Its placement order as shown in the figure; Diffuser plate 8 ' is two-layer and two-layer parallel placement; Said prism plate 9 ' is positioned between the two-layer diffuser plate 8 '; The diffuser plate that the is positioned at lower floor 8 ' below that said fluorescent plate 3 ' is parallel; Said led light source 1 ' be positioned at fluorescent plate 3 ' under, said reflector 7 ' be positioned at led light source 1 ' under and reflector 7 ' upwards form semicircular encirclement structure from himself two ends.Its course of work is following: LED is as excitaton source, and the ripple of the certain wavelength that sends arrives fluorescent plate through reflector and direct irradiation.The wavelength that is stimulated of fluorescent plate is suitable basically less than 3nm with LED master's crest wavelength difference, so fluorescent plate is luminous under the exciting of led light source, the light that excites is through diffuser plate and prism plate, as the liquid crystal backlight.
As shown in Figure 4, be the structure chart that New LED excites the area source method in illumination light source, to use.Whole device comprises led light source 1 ", reflector 7 ", fluorescent plate 3 " and diffuser plate 8 "; Its placement order as shown in the figure; Reflector 7 ", led light source 1 ", fluorescent plate 3 " and diffuser plate 8 " be provided with from bottom to top successively; Wherein, said reflector 7 " upwards form semicircle from himself two ends and surround structure.Its course of work is following: LED is as excitaton source, through reflector 7 " and direct irradiation, arrive fluorescent plate 3 ".Fluorescent plate 3 " the wavelength that is stimulated suitable basically with LED master's crest wavelength difference less than 3nm, so fluorescence excitation plate 3 " luminous.The light that excites then is through diffuser plate, as illumination light source.
The above only is one embodiment of the present invention; It or not whole or unique embodiment; The conversion of any equivalence that those of ordinary skills take technical scheme of the present invention through reading specification of the present invention is claim of the present invention and contains.
Claims (8)
1. a LED excites the device of area source; It is characterized in that: comprise led light source (1), by the fluorescent plate (3) of led light source (1) institute stimulated luminescence as excitaton source; And the diffuser plate (8) that is positioned at fluorescent plate (3) top; Wherein, said led light source (1) comprises a plurality of led light sources that are arranged on the substrate.
2. a kind of LED as claimed in claim 1 excites the device of area source, it is characterized in that: the difference of the main crest wavelength of said led light source and the wavelength that is stimulated of fluorescent plate is less than 3nm.
3. a kind of LED as claimed in claim 1 excites the device of area source, it is characterized in that: said led light source is integrated to be encapsulated on the substrate.
4. a kind of LED as claimed in claim 1 excites the device of area source, it is characterized in that: said substrate is PCB substrate, aluminium base, copper base or ceramic substrate.
5. a kind of LED as claimed in claim 1 or 2 excites the device of area source; It is characterized in that: the reflector (7) that said LED excites the device of area source further to comprise to be positioned at the LGP (5) under the fluorescent plate (3) and is positioned at LGP (5) below; Said led light source (1) is positioned at the end positions of LGP (5), and said reflector (7) upwards forms from himself two ends and surrounds structure and led light source is surrounded.
6. a kind of LED as claimed in claim 2 excites the device of area source, it is characterized in that: said diffuser plate (8) comprises two-layer, between this two-layer diffuser plate, is provided with prism plate (9).
7. excite the device of area source like claim 1 or 6 described a kind of LED, it is characterized in that: said led light source be positioned at fluorescent plate under, below led light source, further be provided with reflector.
8. a LED excites the method for area source, and it is characterized in that: as excitaton source, the difference of the main crest wavelength of said led light source and the wavelength that is stimulated of fluorescent plate is less than 3nm, and is luminous with led light source fluorescence excitation plate with led light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102020383A CN102353015A (en) | 2011-07-19 | 2011-07-19 | Light-emitting diode (LED) excited surface light source device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102020383A CN102353015A (en) | 2011-07-19 | 2011-07-19 | Light-emitting diode (LED) excited surface light source device and method |
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| CN102353015A true CN102353015A (en) | 2012-02-15 |
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| CN2011102020383A Pending CN102353015A (en) | 2011-07-19 | 2011-07-19 | Light-emitting diode (LED) excited surface light source device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748612A (en) * | 2012-06-13 | 2012-10-24 | 深圳市华星光电技术有限公司 | Surface light source and display device |
| CN102798060A (en) * | 2012-09-11 | 2012-11-28 | 深圳市华星光电技术有限公司 | Direct-lighting backlight module |
| CN108269907A (en) * | 2016-12-30 | 2018-07-10 | 光宝科技股份有限公司 | Light emitting diode packaging structure and chip-level light emitting unit |
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| TW200623942A (en) * | 2004-12-30 | 2006-07-01 | Samsung Electro Mech | LED backlight apparatus |
| CN101017814A (en) * | 2007-01-09 | 2007-08-15 | 吕大明 | A separating fluorescence film white LED lamp |
| CN201242640Y (en) * | 2008-04-30 | 2009-05-20 | 大连路明发光科技股份有限公司 | Liquid crystal display backlight module |
| CN101968185A (en) * | 2010-07-30 | 2011-02-09 | 南京中电熊猫液晶显示科技有限公司 | Thin-type LED (Light-Emitting Diode) backlight source |
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2011
- 2011-07-19 CN CN2011102020383A patent/CN102353015A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200623942A (en) * | 2004-12-30 | 2006-07-01 | Samsung Electro Mech | LED backlight apparatus |
| CN101017814A (en) * | 2007-01-09 | 2007-08-15 | 吕大明 | A separating fluorescence film white LED lamp |
| CN201242640Y (en) * | 2008-04-30 | 2009-05-20 | 大连路明发光科技股份有限公司 | Liquid crystal display backlight module |
| CN101968185A (en) * | 2010-07-30 | 2011-02-09 | 南京中电熊猫液晶显示科技有限公司 | Thin-type LED (Light-Emitting Diode) backlight source |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748612A (en) * | 2012-06-13 | 2012-10-24 | 深圳市华星光电技术有限公司 | Surface light source and display device |
| WO2013185364A1 (en) * | 2012-06-13 | 2013-12-19 | 深圳市华星光电技术有限公司 | Area light source and display device |
| CN102798060A (en) * | 2012-09-11 | 2012-11-28 | 深圳市华星光电技术有限公司 | Direct-lighting backlight module |
| CN102798060B (en) * | 2012-09-11 | 2015-10-07 | 深圳市华星光电技术有限公司 | Down straight aphototropism mode set |
| CN108269907A (en) * | 2016-12-30 | 2018-07-10 | 光宝科技股份有限公司 | Light emitting diode packaging structure and chip-level light emitting unit |
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Application publication date: 20120215 |