CN102157670A - Light-emitting device - Google Patents
Light-emitting device Download PDFInfo
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- CN102157670A CN102157670A CN 201010128187 CN201010128187A CN102157670A CN 102157670 A CN102157670 A CN 102157670A CN 201010128187 CN201010128187 CN 201010128187 CN 201010128187 A CN201010128187 A CN 201010128187A CN 102157670 A CN102157670 A CN 102157670A
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- emitting diode
- emitting device
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Abstract
The invention provides a light-emitting device which comprises a loader, a light-emitting diode (LED) element and a coloured lens. The LED element is disposed on the loader and electrically connected to the loader. The coloured lens is disposed on the LED element, and the colour of the coloured lens is changed gradually in a direction far away the LED element, wherein a light beam supplied by the LED element is transmitted to the coloured lens and radiated out of the light-emitting device.
Description
Technical field
The invention relates to a kind of light-emitting device, and particularly about a kind of light-emitting device with preferable optical appearance.
Background technology
Light-emitting diode is a kind of by the light-emitting component that semi-conducting material constituted that contains III-V family element, and that light-emitting diode has is long such as the life-span, volume is little, high shock resistance, low-heat produces and advantage such as low power consumption, therefore has been widely used in indicating device or light source in family expenses and the various device.In recent years, light-emitting diode is towards multicolour and high brightness development, so its application has extended to large-scale billboards, traffic signal light and association area.In future, light-emitting diode even may become the main lighting source that has power saving and environment-friendly function concurrently.
For example, packaged type great majority with present high-power white light-emitting diode encapsulation are to adopt the use of the blue light-emitting diode and the yellow phosphorescence powder of arranging in pairs or groups to form, (Color Rendering Index fails the real demand that satisfies illumination always in performance CRI) yet the white light-emitting diodes that adopts this mode is at color rendering.In addition, the white light emitting diode that adopts the blue light diode and the yellow phosphorescence powder of arranging in pairs or groups is often can be because yellow phosphorescence powder skewness on chip on the processing procedure, the peripheral circle gold-tinted that can distribute of white light that makes its outgoing, and this phenomenon is called " yellow dizzy " usually.
Therefore, the past can be added brightening agent usually and reduce yellow dizzy generation in order to be solved yellow dizzy problem in fluorescent material, and wherein brightening agent for example is white particles or glass granules, and light beam that so can the scattering light-emitting diode reduces yellow dizzy degree.Relatively, the interpolation of brightening agent has but tended to sacrifice the light extraction efficiency of light-emitting diode integral body, and also can't produce the effect of any lifting in the performance of color rendering.
Summary of the invention
The purpose of this invention is to provide a kind of light-emitting device, it can present preferable optical appearance.
The present invention proposes a kind of light-emitting device, and it comprises a carrier, a light-emitting diode and a colored lens.Light-emitting diode is disposed on the carrier, and is electrically connected to carrier.Colored lens is disposed on the light-emitting diode, and the color of colored lens can be along with toward away from changing on the direction of light-emitting diode gradually, and the light beam that wherein light-emitting diode provided can be passed to colored lens and outgoing in light-emitting device.
In one embodiment of this invention, when above-mentioned light-emitting diode was a blue LED chip, light-emitting device also comprised a yellow phosphorescence material, is disposed between colored lens and the light-emitting diode.
In one embodiment of this invention, above-mentioned light-emitting device also comprises a packing colloid, be covered on the light-emitting diode, and yellow phosphorescence is material doped in packing colloid.
In one embodiment of this invention, carrier is a printed circuit board (PCB).
The present invention proposes a kind of light-emitting device in addition, and it comprises a carrier, a housing, a light-emitting diode chip for backlight unit, a packing colloid and a colored lens.Housing is disposed on the carrier and has an accommodation space to expose carrier.Light-emitting diode chip for backlight unit is positioned at accommodation space and is disposed on the carrier, and light-emitting diode chip for backlight unit is electrically connected to carrier.Packing colloid is disposed on the light-emitting diode chip for backlight unit and is doped with a phosphor material.Colored lens is disposed on the light-emitting diode chip for backlight unit and the breasting carrier, and the color of colored lens is along with toward away from change gradually on the direction of light-emitting diode chip for backlight unit.The light beam that light-emitting diode chip for backlight unit provided can be passed to colored lens and outgoing in light-emitting device by phosphor material.
In one embodiment of this invention, be doped with a dyestuff in the above-mentioned colored lens and form a plurality of chromatographs, and these above-mentioned chromatographs are toward away from ordering in regular turn on the direction of light-emitting diode/chip and change gradually.In one embodiment of this invention, when above-mentioned dyestuff was a blue dyes, the color of these then above-mentioned chromatographs was with away from thin out gradually on the direction of light-emitting diode/chip.In one embodiment of this invention, when above-mentioned dyestuff was an orchil, the color of these then above-mentioned chromatographs was with deepening gradually on the direction away from light-emitting diode/chip.
In one embodiment of this invention, the above-mentioned lip-deep color of colored lens is along with toward away from changing gradually on the direction of light-emitting diode/chip.In one embodiment of this invention, dispose a dyestuff to be formed with the lip-deep color of color lens on the above-mentioned colored lens surface.In one embodiment of this invention, when the lip-deep color of above-mentioned colored lens was blue, then the lip-deep color of colored lens was with away from thin out gradually on the direction of light-emitting diode/chip.In one embodiment of this invention, when the lip-deep color of above-mentioned colored lens was red, then the lip-deep color of colored lens was with deepening gradually on the direction away from light-emitting diode/chip.
In one embodiment of this invention, when light-emitting diode chip for backlight unit was a blue LED chip, phosphor material was a yellow phosphorescence material.
Based on above-mentioned, light-emitting device of the present invention is designed to along with toward away from changing on the direction of light-emitting diode and gradually by the color depth (colourity) with colored lens, and can promote the optical appearance of light-emitting device.Wherein, be along with toward away from the direction of light-emitting diode on, when thin out gradually, then reduce the generation of the yellow phenomenon of swooning and not influence its whole lighting efficiency when dyeing for blue and its color depth (colourity) in the dyestuff of colored lens.In addition, is when deepening gradually on away from the direction of light-emitting diode when dyeing in the dyestuff of colored lens for red and its color depth (colourity), except the generation that can reduce yellow dizzy phenomenon effectively, also can make light-emitting device when being applied to throw light on and can have preferable color rendering.In addition, the shade of colored lens also can find expression on the surface of lens except finding expression in lens inside.
Description of drawings
For above-mentioned feature and advantage of the present invention can be become apparent, below in conjunction with accompanying drawing preferred embodiment of the present invention is elaborated, wherein:
Fig. 1 is the schematic diagram of the light-emitting device of one embodiment of the invention.
Fig. 2 is the curve synoptic diagram that illustrates light-emitting device variation of its light field colour temperature under different angles.
Fig. 3 is the schematic diagram of another example of the light-emitting device in one embodiment of the invention.
Fig. 4 is the schematic diagram of the light-emitting device of another embodiment of the present invention.
Fig. 5 is the curve synoptic diagram that illustrates light-emitting device variation of its light field colour temperature under different angles.
Fig. 6 is the schematic diagram of the another example of the light-emitting device in another embodiment of the present invention.
Embodiment
Fig. 1 is the schematic diagram of the light-emitting device of one embodiment of the invention.Please refer to Fig. 1, the light-emitting device 100 of present embodiment comprises a carrier 110, a light-emitting diode 120 and a colored lens 130.Light-emitting diode 120 is disposed on the carrier 110, and is electrically connected to carrier 110.In the present embodiment, carrier 110 for example is a printed circuit board (PCB) or other suitably disposes the substrate of a plurality of circuitry lines.In addition, light-emitting diode 120 for example is white light emitting diode encapsulation, and its packaged type can be to adopt the use of a blue led chips 122 and the yellow phosphorescence material 124 of arranging in pairs or groups to form, but is not limited thereto.In one embodiment, light-emitting diode 120 also can be light-emitting diode chip for backlight unit and arrange in pairs or groups suitable phosphor powder or the fluorescent material that adopts other color, thereby makes light-emitting diode 120 that the white light or the light of other color can be provided.The light-emitting diode 120 of present embodiment is to use yellow phosphorescence material 124 to be example with blue led chips 122 collocation, and it is described as follows.
In the present embodiment, light-emitting device 100 can include a packing colloid 140, be disposed on the light-emitting diode 120 and covered, and yellow phosphorescence material 124 can be doped in the packing colloid 140, as shown in Figure 1.In general, the operation that the packing colloid 140 that is doped with yellow phosphorescence material 124 is disposed on the light-emitting diode 120 typically uses gluing process.Yet, adopt this mode can make phosphor powder or fluorescent material skewness on blue led chips 122, thereby cause the peripheral coloured light of the light beam L1 that light-emitting diode 120 provided higher with respect to the colour temperature of central coloured light, curve 102 as shown in Figure 2, wherein Fig. 2 is the curve synoptic diagram that illustrates light-emitting device variation of its light field colour temperature under different angles, and transverse axis define the angle of facing light-emitting diode be 0 the degree.Can make light-emitting device 100 provide when throwing light on thus, and have the dizzy phenomenon of so-called Huang, thereby reduce the optical appearance of light-emitting device 100.
Therefore, in order to solve the above problems, in the light-emitting device 100 of present embodiment, colored lens 130 is to be disposed on the light-emitting diode 120, and the color of colored lens 130 can be along with toward away from changing on the direction of light-emitting diode 120 gradually, and wherein the light beam L1 that provided of light-emitting diode 120 can be passed to colored lens 130 and outgoing in light-emitting device 100.In the present embodiment, when light-emitting diode 120 is to adopt above-mentioned blue LED chip 122 and the above-mentioned yellow phosphorescence material 124 of arranging in pairs or groups when using, for example be to be doped with a dyestuff (not illustrating) and in colored lens 130, to form a plurality of chromatographs 132 in the colored lens 130, and these chromatographs 132 are toward away from ordering in regular turn on the direction of light-emitting diode 120 and change gradually.Specifically, if when above-mentioned dyestuff is a blue organic dyestuff, the color of these then above-mentioned chromatographs 132 can be with away from thin out gradually on the direction of light-emitting diode 120, as shown in Figure 1.In the present embodiment, if light-emitting device 100 is after adopting above-mentioned colored lens 130, then light field and the color temperature distribution of light-emitting device 100 under different angles just can be as shown in the curve among Fig. 2 104.
By finding among Fig. 2, when if light-emitting device 100 only adopts general lens, the peripheral light field of the light beam L1 that then it provided can be higher with respect to the colour temperature of central light field, and have the dizzy phenomenon of aforesaid Huang, and the promptly general traditional optical lens of meaning is to improve the dizzy phenomenon of aforesaid Huang.Otherwise, when light-emitting device 100 is when adopting the colored lens of as above addressing among Fig. 1 to be illustrated 130, apparently, the colour temperature of the peripheral light field of light beam L1 just can be lowered before comparing, as shown in Figure 2, meaning promptly is that color temperature difference between peripheral light field and the central light field just can be reduced significantly.In other words, thus the dizzy phenomenon of above-mentioned Huang will be improved because of the colored lens 130 of present embodiment and make light-emitting device 100 can present preferable optical appearance.
Need to prove, Fig. 1 only is the schematic diagram that illustrates colored lens 130, in other embodiments, color in the colored lens 130 except can be with the color depth of multilayer chromatograph 132 with away from the direction of light-emitting diode 120 and thin out gradually, it also can be with away from thin out gradually on the direction of light-emitting diode 120 in the dizzy mode of opening.In other words, the color that aforementioned mode with multiple color layer 132 is expressed in the colored lens 130 only is a kind of example, non-ly only limits to this.Such as the color depths (colourity) in the colored lens 130 can be with away from the direction of light-emitting diode 120 and possible the example that changes gradually is all the scope that institute of the present invention desire is protected.
In addition, thus the color of above-mentioned colored lens 130 gradually the mode of layer be see through dopant dye in lens, make color gradually the technical characterictic of layer be to be formed at colored lens 130 inside.In another embodiment, also can be on the surface of lens and form another kind of colored lens 130a, as the light-emitting device 100a that Fig. 3 illustrated with dye adulterated.
In light-emitting device 100a, the lip-deep color of colored lens 130a is along with toward away from changing gradually on the direction of light-emitting diode 120.Specifically, can be to dispose dyestuff on the colored lens 130a surface to be formed with the lip-deep color of color lens 130a.Similarly, if when dyestuff is to use blue organic dyestuff 132a, then the lip-deep color depth of colored lens 130a (colourity) is with away from thin out gradually on the direction of light-emitting diode 120, as shown in Figure 3.Thus, colored lens 130a can reduce light-emitting device 100a equally the dizzy phenomenon of above-mentioned Huang takes place, thereby makes light-emitting device 100a have preferable optical appearance.
In addition, Fig. 4 is the schematic diagram of the light-emitting device of another embodiment of the present invention.Please also refer to Fig. 1 and Fig. 4, light-emitting device 200 and light-emitting device 100 structural similarities, only difference be in, the color of the colored lens 230 in the light-emitting device 200 gradually layer be along with on direction, deepening gradually away from light-emitting diode 220, as shown in Figure 4.For example, when the dyestuff in being doped in colored lens 230 was red organic dyestuff, then the color depth (colourity) of a plurality of chromatographs 232 that form in colored lens 230 can deepen on the direction away from light-emitting diode 220 in regular turn gradually.At this moment, light-emitting device 200 is after adopting colored lens 230, and its light field and color temperature distribution under different angles just can be as shown in the curve among Fig. 5 202.
Similarly, in Fig. 5, when if light-emitting device 200 only adopts general lens, the peripheral light field of the light beam L1 that then it provided can be higher with respect to the colour temperature of central light field, shown in the curve among Fig. 5 102, and having the dizzy phenomenon of aforesaid Huang, the promptly general traditional optical lens of meaning is to improve the dizzy phenomenon of aforesaid Huang.Otherwise, when light-emitting device 200 is when adopting the colored lens of as above addressing among Fig. 4 to be illustrated 230, apparently, the colour temperature of the central light field of light beam L1 just can be raised before comparing, as shown in Figure 5, meaning promptly is that color temperature difference between peripheral light field and the central light field just can be reduced significantly.Thus, yellow dizzy phenomenon is except can achieving a solution, (Commission International de l ' is not enough wave band in the chromatic diagram Eclairage) in CIE can also to compensate light-emitting device 200, thereby can promote light-emitting device 200 in color rendering (Color Rendering Index, CRI) performance on.
Similarly, Fig. 4 only is the schematic diagram that illustrates colored lens 230, in other embodiments, color in the colored lens 230 is except can being with away from the direction of light-emitting diode 220 and deepening gradually, it also can be with deepening gradually on the direction away from light-emitting diode 220 in the dizzy mode of opening with the color depth of multilayer chromatograph 232.In other words, the color that aforementioned mode with multiple color layer 232 is expressed in the colored lens 230 only is a kind of example, non-ly only limits to this.Such as the color depths (colourity) in the colored lens 230 can be with away from the direction of light-emitting diode 220 and possible the example that changes gradually is all the scope that institute of the present invention desire is protected.
In addition, thus the color of above-mentioned colored lens 230 gradually the mode of layer be see through dopant dye in lens, make color gradually the technical characterictic of layer be to be formed at colored lens 230 inside.In another embodiment, also can be on the surface of lens and form another kind of colored lens 230a, as the light-emitting device 200a that Fig. 6 illustrated with dye adulterated.
In light-emitting device 200a, the lip-deep color of colored lens 230a is along with toward away from changing gradually on the direction of light-emitting diode 220.Specifically, can be to dispose dyestuff on the colored lens 230a surface to be formed with the lip-deep color of color lens 230a.Similarly, if when dyestuff is to use red organic dyestuff 232a, then the lip-deep color depth of colored lens 230a (colourity) is with deepening gradually on the direction away from light-emitting diode 220, as shown in Figure 6.Thus, colored lens 230a takes place more can make light-emitting device 200a have high color rendering (CRI), thereby make light-emitting device 200a have preferable optical appearance the dizzy phenomenon of above-mentioned Huang except reducing light-emitting device 200a.
Need to prove, above-mentioned light-emitting device 100,100a, 200,200a more can include a housing 160 respectively, be disposed on the carrier 110,210, and housing 160 has an accommodation space S1 to expose carrier 110,210, as Fig. 1, Fig. 3, Fig. 4 and shown in Figure 6.In addition, aforesaid light-emitting diode 120,220 is positioned at accommodation space S1 and is disposed on the carrier 110,210.Above-mentioned colored lens 130,130a, 230,230a distinctly are disposed on the light-emitting diode 120,220 also separately in breasting carrier 110,210.
In sum, light-emitting device of the present invention has following advantage at least.At first, see through colored lens is disposed on the light-emitting diode, and the color depth of colored lens (colourity) is along with toward away from change gradually on the direction of light-emitting diode, and can promote the optical appearance of light-emitting device.In addition, be along with toward away from the direction of light-emitting diode on, when thin out gradually, then not influencing the generation that still can reduce the yellow phenomenon of swooning under its whole lighting efficiency effectively when dyeing for blue and its color depth (colourity) in the dyestuff of colored lens.Moreover, is when deepening gradually on away from the direction of light-emitting diode when dyeing in the dyestuff of colored lens for red and its color depth (colourity), except under not influencing its whole lighting efficiency and still can reduce effectively the generation of yellow dizzy phenomenon, also can make light-emitting device have preferable color rendering.In addition, the shade of colored lens is except finding expression in lens inside, and it also can find expression on the surface of lens.
Though the present invention discloses as above with embodiment; yet it is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can making all changes that is equal to or replacement, so protection scope of the present invention is when looking accompanying being as the criterion that the application's claim scope defined.
Claims (20)
1. a light-emitting device is characterized in that, comprising:
One carrier;
One light-emitting diode is disposed on this carrier, and is electrically connected to this carrier; And
One colored lens, be disposed on this light-emitting diode, and the color of this colored lens is along with toward away from changing gradually on the direction of this light-emitting diode, and the light beam that wherein this light-emitting diode provided can be passed to this colored lens and outgoing in this light-emitting device.
2. light-emitting device according to claim 1 is characterized in that, be doped with a dyestuff in this colored lens and form a plurality of chromatographs, and those chromatographs is toward away from ordering in regular turn on the direction of this light-emitting diode and change gradually.
3. light-emitting device according to claim 2 is characterized in that, when this dyestuff was a blue dyes, then the color of those chromatographs was with away from thin out gradually on the direction of this light-emitting diode.
4. light-emitting device according to claim 2 is characterized in that, when this dyestuff was an orchil, then the color of those chromatographs was with deepening gradually on the direction away from this light-emitting diode.
5. light-emitting device according to claim 1 is characterized in that, the lip-deep color of this colored lens is along with toward away from changing gradually on the direction of this light-emitting diode.
6. light-emitting device according to claim 5 is characterized in that, disposes a dyestuff on this colored lens surface to form the lip-deep color of this colored lens.
7. light-emitting device according to claim 5 is characterized in that, when the lip-deep color of this colored lens was blue, then the lip-deep color of this colored lens was with away from thin out gradually on the direction of this light-emitting diode.
8. light-emitting device according to claim 5 is characterized in that, when the lip-deep color of this colored lens was red, then the lip-deep color of this colored lens was with deepening gradually on the direction away from this light-emitting diode.
9. light-emitting device according to claim 1 is characterized in that, when this light-emitting diode was a blue LED chip, this light-emitting device also comprised a yellow phosphorescence material, was disposed between this colored lens and this light-emitting diode.
10. light-emitting device according to claim 9 is characterized in that, also comprises a packing colloid, be covered on this light-emitting diode, and this yellow phosphorescence is material doped in this packing colloid.
11. light-emitting device according to claim 1 is characterized in that, this carrier is a printed circuit board (PCB).
12. a light-emitting device is characterized in that, comprising:
One carrier;
One housing is disposed on this carrier and has an accommodation space to expose this carrier;
One light-emitting diode chip for backlight unit is positioned at this accommodation space and is disposed on this carrier, and this light-emitting diode chip for backlight unit is electrically connected to this carrier;
One packing colloid is disposed on this light-emitting diode chip for backlight unit and is doped with a phosphor material; And
One colored lens, be disposed on this light-emitting diode chip for backlight unit and this carrier of breasting, and the color of this colored lens is along with toward away from changing gradually on the direction of this light-emitting diode chip for backlight unit, and the light beam that wherein this light-emitting diode chip for backlight unit provided can be passed to this colored lens and outgoing in this light-emitting device by this phosphor material.
13. light-emitting device according to claim 12 is characterized in that, be doped with a dyestuff in this colored lens and form a plurality of chromatographs, and those chromatographs is toward away from ordering in regular turn on the direction of this light-emitting diode chip for backlight unit and change gradually.
14. light-emitting device according to claim 13 is characterized in that, when this dyestuff was a blue dyes, then the color of those chromatographs was with away from thin out gradually on the direction of this light-emitting diode chip for backlight unit.
15. light-emitting device according to claim 13 is characterized in that, when this dyestuff was an orchil, then the color of those chromatographs was with deepening gradually on the direction away from this light-emitting diode chip for backlight unit.
16. light-emitting device according to claim 12 is characterized in that, the lip-deep color of this colored lens is along with toward away from changing gradually on the direction of this light-emitting diode chip for backlight unit.
17. light-emitting device according to claim 16 is characterized in that, disposes a dyestuff on this colored lens surface to form the lip-deep color of this colored lens.
18. light-emitting device according to claim 16 is characterized in that, when the lip-deep color of this colored lens was blue, then the lip-deep color of this colored lens was with away from thin out gradually on the direction of this light-emitting diode chip for backlight unit.
19. light-emitting device according to claim 16 is characterized in that, when the lip-deep color of this colored lens was red, then the lip-deep color of this colored lens was with deepening gradually on the direction away from this light-emitting diode chip for backlight unit.
20. light-emitting device according to claim 12 is characterized in that, when this light-emitting diode chip for backlight unit was a blue LED chip, this phosphor material was a yellow phosphorescence material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010128187 CN102157670A (en) | 2010-02-11 | 2010-02-11 | Light-emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010128187 CN102157670A (en) | 2010-02-11 | 2010-02-11 | Light-emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102157670A true CN102157670A (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010128187 Pending CN102157670A (en) | 2010-02-11 | 2010-02-11 | Light-emitting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362230A (en) * | 2014-12-03 | 2015-02-18 | 广东威创视讯科技股份有限公司 | Method for improving yellow ring phenomenon of white-light LED (light emitting diode) and white-light LED structure |
| CN109309154A (en) * | 2018-10-12 | 2019-02-05 | 京东方科技集团股份有限公司 | Display unit, display base plate and preparation method thereof, display device |
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| CN1836339A (en) * | 2002-08-30 | 2006-09-20 | 吉尔科有限公司 | Light emitting diode with improved effience |
| CN101369614A (en) * | 2007-08-17 | 2009-02-18 | 刘胜 | Packaging structure and method for high power white light LED |
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| US5847507A (en) * | 1997-07-14 | 1998-12-08 | Hewlett-Packard Company | Fluorescent dye added to epoxy of light emitting diode lens |
| CN1836339A (en) * | 2002-08-30 | 2006-09-20 | 吉尔科有限公司 | Light emitting diode with improved effience |
| US20040070001A1 (en) * | 2002-10-15 | 2004-04-15 | Jung-Tai Lee | LED element |
| CN1777999A (en) * | 2003-02-26 | 2006-05-24 | 美商克立股份有限公司 | Composite white light source and method for fabricating |
| CN101636851A (en) * | 2007-02-26 | 2010-01-27 | 皇家菲利浦电子有限公司 | Have phosphor sheet and the LED that crosses the mold pressing phosphor in the lens |
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| CN109309154A (en) * | 2018-10-12 | 2019-02-05 | 京东方科技集团股份有限公司 | Display unit, display base plate and preparation method thereof, display device |
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Application publication date: 20110817 |