CN201228925Y - Superbright multicolour LED backlight source for circular scale - Google Patents
Superbright multicolour LED backlight source for circular scale Download PDFInfo
- Publication number
- CN201228925Y CN201228925Y CNU2008201029168U CN200820102916U CN201228925Y CN 201228925 Y CN201228925 Y CN 201228925Y CN U2008201029168 U CNU2008201029168 U CN U2008201029168U CN 200820102916 U CN200820102916 U CN 200820102916U CN 201228925 Y CN201228925 Y CN 201228925Y
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- light emitting
- emitting diode
- circular
- arc
- lgp
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Abstract
The utility model provides a super bright multicolor light emitting diode backlight for a circular scale, which relates to a lighting device. The utility model provides a super bright multicolor light emitting diode backlight for a circular scale, which both can use least LED and can meet the demands for evenly displaying the calibration of a circular arc and a circular disk, and is equipped with a light guide plate, a reflective film, a light emitting diode and a shading film, wherein the light guide plate is equipped with an arc-shaped gap, the reflective film is arranged on the bottom portion of the light guide plate, the light emitting diode is arranged on the side edge of the arc-shaped gap which is arranged on the light guide plate, the shading film is arranged on the upper surface of the light guide plate, and the light guide plate is a round or a circular-arc light guide plate. The LED lights along a circular-arc plane following an optical dot light path, thereby achieving the purpose that a circular-arc band lights. The LED is arranged on the side edge of the arc-shaped gap which is arranged on the light guide plate, a field angle of the circular-arc lighting band, which uses a circular as a center can be arranged in 270 degrees. The light utilization ratio of the circular-arc lighting band is high, the lighting is even and uniform and has no color difference, the lighting is soft, and the vision fatigue can not be caused during long-term observation. The color, the brightness and the size of the lighting can be adjusted.
Description
Technical field
The utility model relates to a kind of lighting device, especially relates to a kind of superbright multi-color LED backlight that is used for circular scale.
Background technology
Existing light emitting diode (LED) backlight generally is to form geometries such as rectangle, square or rhombus with line segment, shows actually rare for being applied in ellipse or circular display type dial.Lay the blame on the straight line conduction that its difficulty is unfavorable light on circular radian, desire to make the luminous demonstration of whole circle, the LED quantity that needs is more, and power consumption is bigger relatively.
Notification number provides a kind of distribution of light back light source in LED even and simple in structure for the utility model patent of CN2653542, comprise a light emitting diode, a LGP and a reflector plate, wherein, this reflector plate is arranged on the side of this LGP, the side of this reflector plate and LGP folds and forms a cavity, and this light emitting diode is arranged on this cavity top and between the side and reflector plate of this LGP.
Notification number provides a kind of back light source in LED for the utility model patent of CN201072052, comprise viewing area and the fringe region that is positioned at outside, described viewing area, be provided with light emitting diode group in several zones of forming by light emitting diode in the viewing area, edge region is established several light emitting diodes, light emitting diode is formed several regional UV light-emitting diode groups with the light emitting diode that is positioned at the edge, viewing area, and regional UV light-emitting diode group is identical with the combining structure of light emitting diode group in the zone.
Summary of the invention
The purpose of this utility model is to provide a kind of LED of both available minimum numbers, can satisfy the superbright multi-color LED backlight that is used for circular scale that circular arc, circular dial scale evenly show needs again.
The utility model is provided with LGP, reflectance coating, light emitting diode, photomask, LGP is provided with arc notch, reflectance coating is located at the bottom of LGP, light emitting diode is located on the arc notch edge on the LGP, photomask is located at the LGP upper surface, and LGP is circle or circular arc LGP.
Described arc notch is preferably circular arc cutaway.Reflectance coating is preferably circle or circular arc reflectance coating.Light emitting diode is preferably established left light emitting diode group and right light emitting diode group, left side light emitting diode group is preferably established 2 light emitting diodes at least, right light emitting diode group is preferably established 2 light emitting diodes at least, the light emitting diode that left side light emitting diode group and right light emitting diode group are different wave length, a left side light emitting diode group and right light emitting diode group be preferably uniform or symmetrical to be located on the left and right sides at arc notch edge, on LGP, preferably establish the optics site, the optics site preferably is distributed on the LGP upper surface, the periphery of LGP is preferably established the bound edge film, preferably is provided with lamp source photomask on the arc notch edge of light emitting diode being provided with.
Compare with existing LED-backlit source, because the utility model helps the optics site of light conduction, scattering near circumferential edges design at circular arc, circular LGP, the also regular in order distribution of its density makes that LED is luminous to reach the luminous purpose of circular arc band along the circular arc plane along optics site light path.For the LED that realizes the multicolor luminous available two groups of different dominant wavelengths of LED controls by circuit, obtain monochromatic, polychrome circular arc luminous zone.Circular arc luminous zone width designs according to different display instrument panel actual diameters.Owing to about led light source is divided into two groups, can establish 2～3 different wave length LED for every group, so both sides are simultaneously luminous, synchronous light-emitting.Because LED is located at the arc notch edge of LGP, so the circular arc luminous zone can be made as 270 degree with the subtended angle of justifying the center.In addition, the light utilization efficiency height of circular arc luminous zone, uniformity, no color differnece, luminous soft, long-term observation can not cause asthenopia.Simultaneously, luminous color, brightness and size can suitably be adjusted according to different user demands.The utility model can be applicable to pointer-type, digital display type or the liquid crystal display formula dial plate of vehicle driving chamber, be improvement and upgraded product, and can be used for thermoelectric magnetic instrument such as tester that dynamic pointer directly perceived shows, portable type measuring instrument, electro static instrument, universal meter, voltmeter with old-fashioned instrument and meter that dynamic pointer shows.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is a kind of circuit of LED theory of constitution figure of the utility model embodiment.
Fig. 3 is the another kind of circuit of LED theory of constitution figure of the utility model embodiment.
The specific embodiment
Following examples will be further described the utility model in conjunction with the accompanying drawings.
Referring to Fig. 1, the utility model be provided with circular LGP 1, circular reflectance coating 2, about 2 groups of light emitting diodes 3 and annular photomask 4, LGP 1 is provided with circular arc cutaway 11, reflectance coating 2 is located at the bottom of LGP 1, light emitting diode 3 is located on the circular arc cutaway edge 12 on the LGP 1, and photomask 4 is located at LGP 1 upper surface.
About 2 groups of light emitting diodes 3 be respectively equipped with 2 light emitting diodes, the light emitting diode that left side light emitting diode group and right light emitting diode group are different wave length, about 2 groups of light emitting diode 3 symmetries be located on the left and right sides at circular arc cutaway edge 12, on LGP 1, be provided with optics site 13, optics site 13 is distributed on LGP 1 upper surface, form luminous zone 14, the periphery 15 of LGP 1 is established bound edge film 5, is provided with lamp source photomask 6 on the circular arc cutaway edge 12 of light emitting diode being provided with.
After using the LED-backlit source, the luminous density distribution transmission along circular LGP optics site of LED, scattering, reflect to form light path, integral body is shown as luminous circular arc band, can realize functions such as display scale dish and indivedual numeral thereof, symbol, literal.
Control circuit can be made the constant-current source circuit that each led light source is in parallel or connect, shown in Fig. 2 and 3 according to the needs of actual different colours, brightness.
Claims (10)
1. the superbright multi-color LED backlight that is used for circular scale, it is characterized in that being provided with LGP, reflectance coating, light emitting diode, photomask, LGP is provided with arc notch, reflectance coating is located at the bottom of LGP, light emitting diode is located on the arc notch edge on the LGP, photomask is located at the LGP upper surface, and LGP is circle or circular arc LGP.
2. the superbright multi-color LED backlight that is used for circular scale as claimed in claim 1 is characterized in that described arc notch is a circular arc cutaway.
3. the superbright multi-color LED backlight that is used for circular scale as claimed in claim 1 is characterized in that described reflectance coating is circle or circular arc reflectance coating.
4. the superbright multi-color LED backlight that is used for circular scale as claimed in claim 1, it is characterized in that light emitting diode establishes left light emitting diode group and right light emitting diode group, left side light emitting diode group is established 2 light emitting diodes at least, and right light emitting diode group is established 2 light emitting diodes at least.
5. as claim 1 or the 4 described superbright multi-color LED backlights that are used for circular scale, it is characterized in that the light emitting diode that left light emitting diode group and right light emitting diode group are different wave length.
6. as claim 1 or the 4 described superbright multi-color LED backlights that are used for circular scale, it is characterized in that on the uniform or symmetrical left and right sides that is located at the arc notch edge of left light emitting diode group and right light emitting diode group.
7. the superbright multi-color LED backlight that is used for circular scale as claimed in claim 1 is characterized in that establishing the optics site on LGP.
8. the superbright multi-color LED backlight that is used for circular scale as claimed in claim 1 is characterized in that the optics site is distributed on the LGP upper surface.
9. as claim 1 or the 7 described superbright multi-color LED backlights that are used for circular scale, it is characterized in that the periphery of LGP is established the bound edge film.
10. the superbright multi-color LED backlight that is used for circular scale as claimed in claim 1 is characterized in that being provided with lamp source photomask on the arc notch edge of light emitting diode being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201029168U CN201228925Y (en) | 2008-07-03 | 2008-07-03 | Superbright multicolour LED backlight source for circular scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201029168U CN201228925Y (en) | 2008-07-03 | 2008-07-03 | Superbright multicolour LED backlight source for circular scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201228925Y true CN201228925Y (en) | 2009-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201029168U Expired - Fee Related CN201228925Y (en) | 2008-07-03 | 2008-07-03 | Superbright multicolour LED backlight source for circular scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201228925Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371139A (en) * | 2014-08-25 | 2016-03-02 | 云光科技股份有限公司 | Side-light type light-emitting module |
-
2008
- 2008-07-03 CN CNU2008201029168U patent/CN201228925Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371139A (en) * | 2014-08-25 | 2016-03-02 | 云光科技股份有限公司 | Side-light type light-emitting module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20160703 |