CN201198993Y - Grating rainbow LED - Google Patents
Grating rainbow LED Download PDFInfo
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- CN201198993Y CN201198993Y CNU2008201021274U CN200820102127U CN201198993Y CN 201198993 Y CN201198993 Y CN 201198993Y CN U2008201021274 U CNU2008201021274 U CN U2008201021274U CN 200820102127 U CN200820102127 U CN 200820102127U CN 201198993 Y CN201198993 Y CN 201198993Y
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- optical waveguide
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Abstract
The utility model discloses a grating rainbow LED which comprises a white light LED, the grating rainbow LED further comprises a concave reflection mirror, a plastic tapered optical waveguide and a diffraction grating, the reflection surface of the concave reflection mirror is faced to the white light LED, the plastic tapered optical waveguide is arranged between the concave reflection mirror and the diffraction grating, the small-end end surface of the plastic tapered optical waveguide is faced to the reflection surface of the concave reflection mirror, and the big-end end surface is faced to the diffraction grating. Compared with the prior art, the grating rainbow LED is the LED which has the rainbow effect and does not need to carry out the control of a power supply, so the power supply is very simple, and the problems of high circuit failure rate of other types of the rainbow LED devices (rainbow tubes) during the application and the like can be avoided. The grating rainbow LED has the advantages of convenient installation, energy conservation, environmental protection and cheap price.
Description
Technical field
The utility model relates to LED decorative art light source, is specially adapted to outdoor advertising board and city's scape engineering.
Background technology
No matter LED (light emitting diode) is as display element or illumination component, all can only send a kind of light of color during constant power supply, and produce color effect (particularly rainbow effect) needs complicated LED combination and control circuit, and cost is higher.The plasticity line style decorative lamp of a kind of LED of being called rainbow tube of Chu Xianing (being LED lamp band again) is to be made with LED, copper cash, PVC sizing material in the market, has red, Huang, green, indigo plant, in vain, double-colored, colors such as seven coloured silks, shape has circle two lines, and three-way and flat two lines of circle are flat three-way, flat four lines and the combination of flat five lines. control by microchip, realize gradual change, saltus step, various variations such as color flicker.Inside includes single loop or multiloop LED lamp string, produces multiple color combination by controller, changes.Be widely used in delineating the building profile, build large-scale light decoration pattern, advertising signboard, the public place of entertainment, various interior decorations, the travelling scenery district, the Karaoke dance hall, the dancing floor, place such as building, hotel name is moulding, effect is remarkable.Also have a kind of LED rainbow literal display in addition, be put together according to dot matrix, have all characteristics of dot matrix type led light source by Picture element lamp or light modulation unit lamp plate.Under the driving of controller, produce the fade effect as the rainbow, bright and glittering, sparkling, add some romances and poetic and pictorial splendor.The said goods all is to pursue and the rainbow effect LED application product of design for the color that satisfies human eye, but owing to need control circuit, has increased cost and fault rate.To count ETG company (in the U.S. with the immediate product of the utility model LED, there is branch company Taiwan and China's Mainland) the rainbow LED (RAINBOW LED) that produces, a kind ofly adopt up-to-date AOlInGaP, the LED lamp that glitters that InGaN and CMOS actuation techniques are integrated in one, colored SMD chip and control chip are packaged into standard T1-3/4 form, by providing different DC voltages to change glow color, belong to the LED device that self has the rainbow effect, this LED that self has the rainbow effect is a rainbow LED inevitable development trend, but this RAINBOW LED complex process that ETG company releases, price is very high, and the market competitiveness is not strong.
The utility model content
The purpose of this utility model provides a kind of need not to add control circuit, easy for installation, energy-conserving and environment-protective, cheap grating rainbow LED.
The technical solution of the utility model is such: grating rainbow LED, comprise white light LEDs, also comprise concave mirror, plastics conical optical waveguide and diffraction grating, the reflecting surface of above-mentioned concave mirror is towards above-mentioned white light LEDs, above-mentioned plastics conical optical waveguide is arranged between above-mentioned concave mirror and the above-mentioned diffraction grating, and the small end end face of above-mentioned plastics conical optical waveguide is towards the reflecting surface of above-mentioned concave mirror, end face is towards above-mentioned diffraction grating greatly.
Above-mentioned white light LEDs is arranged in the above-mentioned plastics conical optical waveguide, and the small end end face of the reflecting surface of above-mentioned concave mirror and above-mentioned plastics conical optical waveguide overlaps.
The small end internal diameter of above-mentioned plastics conical optical waveguide is slightly larger than the diameter of above-mentioned concave mirror.
The diameter of above-mentioned concave mirror is 1～1.5mm, and above-mentioned plastics conical optical waveguide end diameter is greater than 2mm.
Above-mentioned diffraction grating is the concavo-convex gratings of plastics.
The big end end face of above-mentioned diffraction grating and above-mentioned plastics conical optical waveguide overlaps.
The coning angle of above-mentioned plastics conical optical waveguide is that 5 °～7 °, tapered zone length are 60mm～80mm.
The grating constant of the concavo-convex grating of above-mentioned plastics is 10 μ m～20 μ m.
After adopting such scheme, grating rainbow LED of the present utility model, the multi-wavelength visible radiation that white light LEDs sends is focused on the small end end face of plastics conical optical waveguide by loop concave reflector, when light during from the small end incident of conical optical waveguide, after the reflection of fiber waveguide inner boundary, the angle of reflection will increase, so most incident ray can both satisfy total reflection condition at every turn, the corresponding angle of emergence is littler than original incidence angle, emergent light thereby the optically focused effect is arranged.When selecting suitable fiber waveguide tapering and length, this just can be converged to the quasi-parallel light beam for the light beam of dispersing in big end end in the small end end.Place a slice diffraction grating at big end end face, because grating diffration effect, just become by what wavelength was arranged at the output beam of the big end of plastics conical optical waveguide and to disperse the rainbow light beam, the color dynamic effect of this rainbow light beam changes with moving of observer, observe from different directions and can see different color effects, third dimension is strong, and the people is enjoyed as fantasy color.Compared with prior art, grating rainbow LED of the present utility model is a kind of LED that self has the rainbow effect, and need not power supply is controlled, therefore power supply is extremely simple, has avoided the problems such as fault rate height in other type rainbow LED device (rainbow tube) application.And have easy for installation, energy-conserving and environment-protective, cheap advantage.The utility model range of application is extremely extensive, as require emphasis literal and pattern signboards such as interior decoration light fixture, dancing hall, nightclub, bar, coffee shop, hotel, restaurant, park, station, harbour and Entertainment Plaza night the rainbow effect the place.Except the plane shows, also can be used for replacing rainbow lamp and the high pressure neon light that bulb is made, be applied to delineate building profiles such as various mansions, market, mountain villa, advertising signboard, name is moulding etc.Rainbow LED device application scope is wide, and market is huge, and economic benefit is considerable.
Description of drawings
Fig. 1 is a STRUCTURE DECOMPOSITION schematic diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is a light path principle figure of the present utility model.
The specific embodiment
Grating rainbow LED of the present utility model, as shown in Figure 1, 2, comprise the concavo-convex grating 5 of device base 1, concave mirror 2, White-light LED chip 3, plastics conical optical waveguide 4 and plastics, the back side of concave mirror 2 is fixed on the device base 1, White-light LED chip 3 is arranged in the plastics conical optical waveguide 4, the reflecting surface of concave mirror 2 overlaps towards the small end end face 41 of plastics conical optical waveguide 4 and with the small end end face 41 of plastics conical optical waveguide 4, and the concavo-convex grating 5 of plastics is close on the big end end face 42 of plastics conical optical waveguide 4.
Operation principle of the present utility model is as follows: the multi-wavelength visible radiation that White-light LED chip 3 sends is focused on the small end end face 4 of plastics conical optical waveguide 4 by concave mirror 2, when light during from the small end incident of plastics conical optical waveguide 4, at every turn after the reflection of plastics conical optical waveguide 4 inner boundaries, the angle of reflection will increase, so most incident ray can both satisfy total reflection condition, the corresponding angle of emergence is littler than original incidence angle, emergent light thereby the optically focused effect is arranged.When selecting suitable plastic conical optical waveguide 4 taperings and length, this just can be converged to the quasi-parallel light beam for the light beam of dispersing at big end end face 42 places at plastics conical optical waveguide 4 small end end faces 41 places.Place the concavo-convex grating 5 of a slice plastics at big end end face 42, because the diffraction effect of the concavo-convex grating 5 of plastics, just become by what wavelength was arranged at the output beams of plastics conical optical waveguide 4 big ends and to disperse rainbow light beam 6.
Light path principle of the present utility model as shown in Figure 3, the implication of each parameter is as follows among Fig. 3: r
S-plastics conical optical waveguide small end radius; r
LThe big end radius of-plastics conical optical waveguide; θ
S-plastics conical optical waveguide angle of incidence of light; θ
L-plastics conical optical waveguide beam projecting angle (angle of divergence); α-plastics conical optical waveguide cone angle; n
1-plastics conical optical waveguide refractive index.
If plastics conical optical waveguide 4 small end internal diameters are less than concave mirror 2 diameters, then reverberation can not all enter plastics conical optical waveguide 4 and export, therefore, according to existing small-power white light LEDs commonly used, in the utility model, the concave mirror diameter is got 1～1.5mm, and plastics conical optical waveguide 4 small end internal diameters are got greater than 2mm and got final product.
The cone angle of plastics conical optical waveguide 4 and the length decision output beam angle of divergence, and the grating constant (pitch) of the concavo-convex grating 5 of plastics decision beam diffraction angle, the three all exerts an influence to the rainbow effect of rainbow LED.In the utility model, the coning angle of plastics conical optical waveguide 4 is that 5 °～7 °, tapered zone length are 60mm～80mm; The grating constant of the concavo-convex grating 5 of plastics is 10 μ m～20 μ m.
In the utility model, White-light LED chip 3 adopts existing monocrystalline type high-brightness white-light LED chip, promptly utilizes ultraviolet leds to add the effect that RGB three-wavelength phosphor powder reaches white light, and device package pins 31 is standard T1-3/4.
Plastics conical optical waveguide 4 forming methods have: a) optical fiber draws the awl method.The cylindrical fiber of diameter 2～4mm is placed the temperature field of gradient distribution, when temperature is moderate, under the pulling force effect, cylindrical fiber can be drawn into conical fiber, the lumbar vertebrae shape is relevant with Temperature Distribution, by controlling suitable temperature and pulling force, can obtain the good conical fiber of optical quality (waveguide).This scheme does not need the very high mould of surface quality, draws tapering and changes flexibly, and equipment cost is low, but molding cycle is longer, is suitable for the laboratory and adopts and small lot batch manufacture.B) compression-moulding methods.Adopt Shooting Technique, with the mould molding of high accuracy, high surface finish (optical grade), the method equipment cost is higher, is suitable for producing in batches.The conical optical waveguide of injection mo(u)lding also needs to apply one deck optical medium is not destroyed total reflection with the protection interface.
During the device encapsulation, adopt epoxy resin that the concavo-convex grating 5 of concave mirror 2, White-light LED chip 3, plastics conical optical waveguide 4 and plastics is packaged in diameter phi 5mm, in the plastic bushing of length 80mm, form grating rainbow LED device.
Claims (8)
1. grating rainbow LED, comprise white light LEDs, it is characterized in that: also comprise concave mirror, plastics conical optical waveguide and diffraction grating, the reflecting surface of above-mentioned concave mirror is towards above-mentioned white light LEDs, above-mentioned plastics conical optical waveguide is arranged between above-mentioned concave mirror and the above-mentioned diffraction grating, and the small end end face of above-mentioned plastics conical optical waveguide is towards the reflecting surface of above-mentioned concave mirror, end face is towards above-mentioned diffraction grating greatly.
2. grating rainbow LED according to claim 1 is characterized in that: above-mentioned white light LEDs is arranged in the above-mentioned plastics conical optical waveguide, and the small end end face of the reflecting surface of above-mentioned concave mirror and above-mentioned plastics conical optical waveguide overlaps.
3. grating rainbow LED according to claim 1, it is characterized in that: the small end internal diameter of above-mentioned plastics conical optical waveguide is slightly larger than the diameter of above-mentioned concave mirror.
4. according to claim 1 or 3 described grating rainbow LED, it is characterized in that: the diameter of above-mentioned concave mirror is 1～1.5mm, and above-mentioned plastics conical optical waveguide end diameter is greater than 2mm.
5. grating rainbow LED according to claim 1 is characterized in that: above-mentioned diffraction grating is the concavo-convex gratings of plastics.
6. grating rainbow LED according to claim 1 is characterized in that: the big end end face of above-mentioned diffraction grating and above-mentioned plastics conical optical waveguide overlaps.
7. grating rainbow LED according to claim 1 is characterized in that: the coning angle of above-mentioned plastics conical optical waveguide is that 5 °～7 °, tapered zone length are 60mm～80mm.
8. grating rainbow LED according to claim 1 is characterized in that: the grating constant of the concavo-convex grating of above-mentioned plastics is 10 μ m～20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201021274U CN201198993Y (en) | 2008-04-24 | 2008-04-24 | Grating rainbow LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201021274U CN201198993Y (en) | 2008-04-24 | 2008-04-24 | Grating rainbow LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201198993Y true CN201198993Y (en) | 2009-02-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201021274U Expired - Fee Related CN201198993Y (en) | 2008-04-24 | 2008-04-24 | Grating rainbow LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201198993Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126279A (en) * | 2019-12-31 | 2021-07-16 | 成都理想境界科技有限公司 | Optical fiber scanner and near-to-eye display system |
-
2008
- 2008-04-24 CN CNU2008201021274U patent/CN201198993Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126279A (en) * | 2019-12-31 | 2021-07-16 | 成都理想境界科技有限公司 | Optical fiber scanner and near-to-eye display system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xiamen FDK Co., Ltd. Assignor: Huaqiao University Contract record no.: 2010350000142 Denomination of utility model: Grating rainbow LED Granted publication date: 20090225 License type: Exclusive License Record date: 20100712 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20120424 |