CN201121848Y - Scanner light source - Google Patents
Scanner light source Download PDFInfo
- Publication number
- CN201121848Y CN201121848Y CNU2007201820408U CN200720182040U CN201121848Y CN 201121848 Y CN201121848 Y CN 201121848Y CN U2007201820408 U CNU2007201820408 U CN U2007201820408U CN 200720182040 U CN200720182040 U CN 200720182040U CN 201121848 Y CN201121848 Y CN 201121848Y
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- loading plate
- light
- light source
- emitting diode
- scanner
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Abstract
The utility model provides a scanner light source, which comprises a loading plate and a plurality of LEDs, wherein, the LEDs are arranged on the loading plate dispersedly along a straight line; moreover, the distance of the middle part of the loading plate from the LEDs at the two ends of the loading plate is decreased gradually, therefore, the scanner light source can effectively compensate the brightness attenuation at the edge of the optical lens without adding other luminous elements. The scanner light source of the utility model has the advantages of simple structure, convenient production and assembly, etc.
Description
Technical field
The utility model relates to a kind of scanner light source, relates in particular to a kind of scanner light source of illuminance distribution.
Background technology
Along with science and technology development, scanner has become most widely used computer input unit except that keyboard and mouse.Scanner mainly comprises light source, optical lens, photo-sensitive cell and analog-digital converter.When scanner is worked, behind the light beam irradiates scanning object that light emitted goes out and reflect, light beam after the reflection passes optical lens and is imaged on the photo-sensitive cell, photo-sensitive cell converts optical signal to the signal of telecommunication, this signal of telecommunication is converted to data signal and is sent to computer by analog-digital converter again, so the brightness of the light beam that receives of photo-sensitive cell and the uniformity can directly influence the quality of scanning of scanner.
In the prior art, the light source of scanner generally adopts cathode fluorescent tube (Cold CathodeFluorescent Lamp, CCFL), yet the brightness of end positions emitted light beams is lower because the characteristics of luminescence of cathode fluorescent tube makes that this fluorescent tube medium position emitted light beams brightness is higher, and when light beam passes optical lens, because effective half-court corner effect of optical lens, the beam brightness of optical lens edge is decayed, thereby make that the beam brightness that is radiated on the photo-sensitive cell is inhomogeneous, and then cause the quality of scanning of scanner not high.
See also Fig. 1, the TaiWan, China patent announcement has disclosed a kind of light supply apparatus 1 that can improve the brightness of light source two ends for No. 478697 ".This light supply apparatus 1 " comprise a big fluorescent tube 10 ", at least one first lampet pipe 20 " and at least one second lampet pipe 30 ", this big fluorescent tube 10 " have first end 11 " and second end 12 "; the described first lampet pipe 20 " and the second lampet pipe 30 " be separately positioned on big fluorescent tube 10 " first end 11 " and second end 12 " near, with to first end 11 " and second end 12 " beam brightness replenish.This light supply apparatus 1 " though improved big fluorescent tube 10 " first end 11 " and second end 12 " brightness, with the brightness decay of compensate for optical camera lens edge light beam.Yet, this light supply apparatus 1 " need to increase at least one first lampet pipe 20 " and at least one second lampet pipe 30 ", make this light supply apparatus 1 " structure complicated, be not easy to make and assembling.
Summary of the invention
The purpose of this utility model is to provide a kind of brightness scanner light source even and simple in structure at the defective that above-mentioned prior art exists.
For achieving the above object, the utility model provides a kind of scanner light source, comprise a loading plate and a plurality of light emitting diode, this light emitting diode is along straight line and be arranged on dispersedly on the described loading plate, and reduces gradually from middle part to the spacing between the two ends light emitting diode of loading plate of loading plate.
As mentioned above, useful technique effect of the present utility model is, this scanner light source is by disperseing light emitting diode to be arranged on the loading plate along straight line, can increase the brightness of this scanner light source two ends outgoing beam, it need not to add the brightness decay of compensate for optical camera lens edge effectively of other light-emitting component, thereby makes the beam brightness that is radiated on the photo-sensitive cell even, than prior art, have simple in structurely, advantage such as make, easy to assembly.
Description of drawings
In Figure of description:
Fig. 1 is the side schematic view of existing a kind of light supply apparatus.
Fig. 2 is the structural representation of first embodiment of the utility model scanner light source.
Fig. 3 is the side view of scanner light source shown in Figure 2.
Fig. 4 is the structural representation of second embodiment of the utility model scanner light source.
The description of reference numerals of each assembly is as follows among the figure:
The first lampet pipe 20 " the second lampet pipe 30 "
The specific embodiment
For describing technology contents of the present utility model, structural feature, the purpose of being reached and effect in detail, described in detail below in conjunction with embodiment and conjunction with figs..
See also Fig. 2 and Fig. 3, it has disclosed first embodiment of the utility model scanner light source 1, this scanner light source 1 comprises an elongated tabular loading plate 10, a plurality of light emitting diode 20 and two light shields 30, and in the present embodiment, described loading plate 10 is a printed circuit board (PCB).Described light emitting diode 20 is arranged on the loading plate 10 along straight line, and is diminished gradually by the spacing between middle part to the two ends light emitting diode 20 of loading plate 10.Two light shields 30 are separately positioned on loading plate 10 two opposite sides along last, and this two light shield 30 carries the bent camber of a lateral bending of light emitting diode 20 to loading plate 10.This light shield 30 has a medial surface 31, and this medial surface 31 is provided with the reflector layer (not shown).Form a light-emitting window 40 between described two light shields 30.
The light beam part that light emitting diode 20 penetrates directly penetrates from light-emitting window 40, its another part then penetrates from light-emitting window 40 after medial surface 31 reflections of light shield 30 again, light beam is projected on the scanning object after light-emitting window 40 penetrates, behind the light beam irradiates scanning object and reflect, the light beam after the reflection passes the optical lens (not shown) and is imaged on the photo-sensitive cell (not shown).Because it is little that the gap ratio that is arranged on the light emitting diode 20 at loading plate 10 two ends is arranged on the spacing of light emitting diode 20 at loading plate 10 middle parts, thereby the effectively brightness decay of compensate for optical camera lens edge light beam, and then the beam brightness that photo-sensitive cell is received is even.
See also Fig. 4, it has disclosed second embodiment of the utility model scanner light source 1, the structural similarity of the present embodiment and first embodiment, in the present embodiment, scanner light source 1 comprises loading plate 10, a plurality of light emitting diode 20 ' and light shield 30, its difference is: described light emitting diode 20 ' is arranged on the loading plate 10 along straight line equally spacedly, and the brightness difference of the emission light beam of described light emitting diode 20 ', the brightness of launching light beam from middle part to the two ends of loading plate 10 light emitting diode 20 ' strengthens gradually.Light emitting diode 20 ' the brightness that is arranged on loading plate 10 middle parts owing to the light emitting diode 20 ' brightness ratio that is arranged on loading plate 10 two ends is big, thereby the effectively brightness decay of compensate for optical camera lens edge light beam, and then the beam brightness that photo-sensitive cell is received is even.
As mentioned above, the utility model scanner light source 1 is by being arranged on light emitting diode 20,20 ' dispersedly on the loading plate 10 along straight line, brightness with the outgoing beam that increases these scanner light source 1 two ends, thereby the brightness decay of compensate for optical camera lens edge light beam effectively, and then make the beam brightness that is radiated at photo-sensitive cell even, have simple in structurely, advantage such as make, easy to assembly.
In sum, the utility model scanner light source can reach described effect by the structure of above-mentioned exposure.But above disclosed only is preferred embodiment of the present utility model, from not limiting interest field of the present utility model with this.The equivalence that every the technical staff in the technical field does according to the spirit of utility model is modified or is changed, and all should be encompassed in the application's the claim.
Claims (5)
1. a scanner light source comprises a loading plate and a plurality of light emitting diode; It is characterized in that: described light emitting diode is along straight line and be arranged at dispersedly on the described loading plate.
2. scanner light source according to claim 1 is characterized in that: middle part to the spacing between the two ends light emitting diode of loading plate from loading plate reduces gradually.
3. scanner light source according to claim 1 is characterized in that: described light emitting diode is arranged on the described loading plate equally spacedly, and big in the brightness of the light emitting diode at loading plate middle part in the brightness ratio of the light emitting diode at loading plate two ends.
4. according to each described scanner light source among the claim 1-3, it is characterized in that: described scanner light source also has two light shields, this two light shield is separately positioned on the two opposite sides of described loading plate along last, and two light shields all are provided with the bent camber of a lateral bending of light emitting diode to loading plate; Form a light-emitting window between two light shields.
5. scanner light source according to claim 4 is characterized in that: described light shield has a medial surface, and this medial surface is provided with reflector layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201820408U CN201121848Y (en) | 2007-12-14 | 2007-12-14 | Scanner light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201820408U CN201121848Y (en) | 2007-12-14 | 2007-12-14 | Scanner light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201121848Y true CN201121848Y (en) | 2008-09-24 |
Family
ID=40009075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201820408U Expired - Fee Related CN201121848Y (en) | 2007-12-14 | 2007-12-14 | Scanner light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201121848Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625021A (en) * | 2011-01-26 | 2012-08-01 | 致伸科技股份有限公司 | Light guide module of scanning device |
| CN104930385A (en) * | 2015-06-30 | 2015-09-23 | 宁波永望电子科技有限公司 | LED lighting source module group |
| CN109425170A (en) * | 2017-08-28 | 2019-03-05 | 日立空调·家用电器株式会社 | Refrigerator |
-
2007
- 2007-12-14 CN CNU2007201820408U patent/CN201121848Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625021A (en) * | 2011-01-26 | 2012-08-01 | 致伸科技股份有限公司 | Light guide module of scanning device |
| CN102625021B (en) * | 2011-01-26 | 2014-07-30 | 致伸科技股份有限公司 | Light guide module of scanning device |
| CN104930385A (en) * | 2015-06-30 | 2015-09-23 | 宁波永望电子科技有限公司 | LED lighting source module group |
| CN109425170A (en) * | 2017-08-28 | 2019-03-05 | 日立空调·家用电器株式会社 | Refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20131214 |