CN101426067A - Scanning module and light source projection device thereof - Google Patents
Scanning module and light source projection device thereof Download PDFInfo
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- CN101426067A CN101426067A CNA2007101665021A CN200710166502A CN101426067A CN 101426067 A CN101426067 A CN 101426067A CN A2007101665021 A CNA2007101665021 A CN A2007101665021A CN 200710166502 A CN200710166502 A CN 200710166502A CN 101426067 A CN101426067 A CN 101426067A
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- light source
- light
- fluorescent tube
- emitting diode
- scan module
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Abstract
A scanning module and a light source projection device thereof. The light source projection device is located below a scanning platform, files are provided on the scanning platform. The light source projection device includes a lamp tube facing to the files to project a first light source; plural light-emitting diodes, located at both ends of the lamp tube, facing to the files to project a second light source, wherein, the files uniformly receive light by the first light source and second light source; and a lamp base for bearing the plural light-emitting diode lamps and the lamp tube.
Description
Technical field
The present invention is relevant for a kind of light source projection device, particularly a kind of scan module and light source projection device thereof.
Background technology
Along with the progress of science and technology, optical scanner (optical scanner) has become the computer peripheral apparatus of day by day popularizing.The mode of optical scanner pick-up image mainly with light-emitting device with irradiate light to the file to be scanned, after the reflection of light via file to be scanned, be directed to photosensory assembly by set of lenses again, and photosensory assembly can detect the light of zones of different reflection varying strength on the file, and reflecting light is converted to numerical data, continuously read in data and be reassembled as the computer image file with scanning software.
See also Fig. 5 and shown in Figure 6, desirable light-emitting device should have uniform Luminance Distribution, but since present scan module mostly with Charged Coupled Device (CCD) A1 as photosensory assembly, and with fluorescent tube A2 as light-emitting device, use and utilize fluorescent tube A2 to illuminate file to be scanned on the scanning platform A3.But because the light of fluorescent tube A2 can be more high than the briliancy at two ends in the briliancy of mid portion, make file A5 to be scanned be subjected to light inhomogeneous, after causing speculum A4 that light is reflexed to Charged Coupled Device A1, it is brighter that its light that receives presents pars intermedia branch, the part of two sides is then darker, the quality of influence scanning.
See also shown in Figure 7, be subjected to the uneven problem of light for solving file A5 to be scanned, just there is scan module that two corresponding light supply apparatuses are set, with the light source that is throwed by relative fluorescent tube A2 two sides of fluorescent tube A2 are partly carried out light filling, though improve two sidepiece beam split briliancy, but make the briliancy of mid portion too high, in addition, each light supply apparatus all need be provided with drive circuit, could light fluorescent tube respectively, not only cause power consumption to heighten, also improve the manufacturing cost of scan module simultaneously, and then cause the scan module volume too huge, heaviness, and then be difficult for by problems such as driver drives.
Hence one can see that, how to improve the light source projects structure of scan module, make file to be scanned be subjected to light even, and solve the problems such as the manufacturing cost that two light supply apparatuses bring promotes, power consumption is big that are provided with, and then avoid the scan module volume too huge, heavy, and improve problems such as driver drive, be the problem that the inventor and the technical field person who is engaged in these relevant industries desire most ardently improvement.
Summary of the invention
In view of this, the invention provides a kind of light source projection device of scan module, be positioned at the below of scanning platform, place file on the scanning platform, light source projection device comprises: fluorescent tube, throw first light source towards file; The plural number light-emitting diode is arranged at fluorescent tube two ends, and towards file projection secondary light source, first light source and secondary light source make file evenly be subjected to light; And lamp socket, in order to carrying fluorescent tube and plural light-emitting diode.
The present invention also provides a kind of scan module, comprises: scanning platform, in order to place file; Fluorescent tube is positioned at the below of scanning platform, throws first light source towards file; The plural number light-emitting diode is arranged at fluorescent tube two ends, and towards file projection secondary light source, first light source and secondary light source make file evenly be subjected to light; And lamp socket, in order to carrying fluorescent tube and plural light-emitting diode.
According to the disclosed structure of the present invention, it is to be positioned on the horizontal plane different with fluorescent tube that plural light-emitting diode corresponds to scanning platform, and wherein, light-emitting diode can be arranged between fluorescent tube and the lamp socket bottom, also can be arranged between lamp socket top and the fluorescent tube.
Moreover lamp socket can be provided with reflective surface, and in order to reflect first light source and secondary light source to file, wherein, reflective surface can be plane or cambered surface.
The present invention carries out light filling with plural light-emitting diode to fluorescent tube two ends, not only do not need additionally to be provided with drive circuit, effectively reduce the manufacturing cost of scan module, in addition, the present invention also can solve and commonly use scan module and two light supply apparatuses are set and then cause volume too huge, heavy and be difficult for by problems such as driver drives, and then can reduce the power consumption of scan module.
Relevant preferred embodiment of the present invention and effect thereof, cooperate now graphic explanation as after.
Description of drawings
Fig. 1 is the schematic perspective view of the light source projection device of first embodiment of the invention.
Fig. 2 is the radiance of the light source projection device of the first embodiment of the invention line chart of writing music.
Fig. 3 is the structural representation of the scan module of first embodiment of the invention.
Fig. 4 is the schematic perspective view of the light source projection device of second embodiment of the invention.
Fig. 5 is a structural representation of commonly using scan module.
Fig. 6 is the radiance of the commonly using scanner line chart of writing music.
Fig. 7 is the another kind of structural representation of commonly using scan module.
The primary clustering symbol description
10.......... scanning platform
20.......... fluorescent tube
30.......... light-emitting diode
40.......... lamp socket
41.......... reflective surface
50.......... speculum
60.......... image sensor
80.......... file
A1.......... Charged Coupled Device
A2.......... fluorescent tube
A3.......... on the scanning platform
A4.......... speculum
A5.......... file to be scanned
Embodiment
Please refer to Fig. 1, Fig. 2 and Fig. 3, be first embodiment of the invention, Fig. 1 is the schematic perspective view of light source projection device, and Fig. 2 is the radiance of the light source projection device line chart of writing music, and Fig. 3 is the structural representation of scanner.
Scan module comprises: scanning platform 10, fluorescent tube 20, light-emitting diode 30, lamp socket 40.
Light-emitting diode 30, be arranged at fluorescent tube 20 2 ends, towards the file 80 projection secondary light sources that are positioned on the scanning platform 10, to make file 80 evenly be subjected to light by first light source and secondary light source, wherein, light-emitting diode is selected from the group that is made up of white light emitting diode, red light-emitting diode, blue light-emitting diode, green light LED and Yellow light emitting diode.
It is to be positioned on the horizontal plane different with fluorescent tube 20 that the plural light-emitting diode 30 of above-mentioned explanation corresponds to scanning platform 10, make the secondary light source of plural light-emitting diode 30 can directly be projected to file 80, and can not be subjected to the obstruction of fluorescent tube 20, and in the present embodiment, plural light-emitting diode 30 is to be located between fluorescent tube 20 and lamp socket 40 bottoms.
According to the disclosed scan module of the present invention, more comprise: speculum 50 and image sensor 60, wherein, speculum 50 is in order to be received from first light source and the secondary light source that file 80 is reflected, and give reflect focalization, and image sensor 60 is in order to being received from first light source and the secondary light source that speculum 50 is reflected, and exports after the optical signal that receives is converted to analog signal.
When file 80 projections first light source of the fluorescent tube on the lamp socket 40 20 on scanning platform 10, light-emitting diode 30 also can throw secondary light sources by the file 80 of while on scanning platform 10, because the intensity that intensity lampet pipe 20 intermediate ends of first light source that fluorescent tube 20 2 ends are throwed are throwed, therefore the secondary light source that can be throwed by the light-emitting diode 30 of fluorescent tube 20 2 ends obtains briliancy performance (as shown in Figure 3) enough and that uniformity is good.After this, first light source and secondary light source are projected to file 80 and make file 80 evenly be subjected to light, and reflex to speculum 50 via file 80, carry out transducer by speculum 50 reflect focalizations to image sensor 60 again.
Please refer to the schematic perspective view of Fig. 4 for the light source projection device of second embodiment of the invention.
In the present embodiment, plural number light-emitting diode 30 can be arranged between lamp socket 40 tops and the fluorescent tube 20, the secondary light source of plural number light-emitting diode 30 can directly be projected to file 80, and can not be subjected to the obstruction of fluorescent tube 20, the secondary light source that can be throwed by the light-emitting diode 30 of fluorescent tube 20 2 ends obtains briliancy performance enough and that uniformity is good.
In addition, plural light-emitting diode 30 also can be arranged between lamp socket 40 tops and the fluorescent tube 20, between fluorescent tube 20 and lamp socket 40 bottoms, to strengthen the light filling effect of 30 pairs of fluorescent tubes 20 of light-emitting diode.
The present invention carries out light filling with 30 pairs of fluorescent tube 20 2 ends of plural light-emitting diode, wherein, it is to be positioned on the horizontal plane different with fluorescent tube 20 that plural number light-emitting diode 30 corresponds to scanning platform 10, not only do not need additionally to be provided with fluorescent tube 20 and drive circuit by this, can effectively reduce the manufacturing cost of scanner, moreover, the present invention carries out light filling with plural light-emitting diode 30, because light-emitting diode 30 volumes are little, in light weight, low power consumption, therefore scanner of the present invention and not only power saving of light source projection device, and solution is commonly used scan module and two light supply apparatuses is set and then causes volume too huge, heavy and difficult by problems such as driver drives, do not have the too high disappearance of briliancy of mid portion yet.
Though technology contents of the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in the category of the present invention, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (10)
1, a kind of light source projection device of scan module is positioned at the below of one scan platform, places a file on this scanning platform, and this light source projection device comprises:
One fluorescent tube throws one first light source towards this document;
The plural number light-emitting diode is arranged at this fluorescent tube two ends, throws a secondary light source towards this document, and this first light source and this secondary light source make this document evenly be subjected to light; And
One lamp socket is in order to carry this fluorescent tube and this plural number light-emitting diode.
2, the light source projection device of scan module as claimed in claim 1 is characterized in that: it is to be positioned on the horizontal plane different with this fluorescent tube that this plural number light-emitting diode corresponds to this scanning platform.
3, the light source projection device of scan module as claimed in claim 2 is characterized in that: this light-emitting diode is located between this fluorescent tube and this lamp socket bottom, between this lamp socket top and this fluorescent tube and at least one place of combination.
4, the light source projection device of scan module as claimed in claim 1 is characterized in that: this lamp socket comprises: a reflective surface, and in order to reflect this first light source and this secondary light source to this document.
5, a kind of scan module comprises:
The one scan platform is in order to place a file;
One fluorescent tube is positioned at the below of this scanning platform, throws one first light source towards this document;
The plural number light-emitting diode is arranged at this fluorescent tube two ends, throws a secondary light source towards this document, and this first light source and this secondary light source make this document evenly be subjected to light; And
One lamp socket is in order to carry this fluorescent tube and this plural number light-emitting diode.
6, scan module as claimed in claim 5 is characterized in that: it is to be positioned on the horizontal plane different with this fluorescent tube that this plural number light-emitting diode corresponds to this scanning platform.
7, scan module as claimed in claim 6 is characterized in that: this light-emitting diode is located between this fluorescent tube and this lamp socket bottom, between this lamp socket top and this fluorescent tube and at least one place of combination.
8, scan module as claimed in claim 5 is characterized in that: this lamp socket comprises: a reflective surface, and in order to reflect this first light source and this secondary light source to this document.
9, scan module as claimed in claim 5 is characterized in that: more comprise: at least one speculum, in order to being received from this first light source and this secondary light source that this document reflects, and give reflect focalization.
10, scan module as claimed in claim 9 is characterized in that: more comprise: an image sensor, and in order to be received from this first light source and this secondary light source that this speculum reflects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101665021A CN101426067A (en) | 2007-11-02 | 2007-11-02 | Scanning module and light source projection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101665021A CN101426067A (en) | 2007-11-02 | 2007-11-02 | Scanning module and light source projection device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101426067A true CN101426067A (en) | 2009-05-06 |
Family
ID=40616384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101665021A Pending CN101426067A (en) | 2007-11-02 | 2007-11-02 | Scanning module and light source projection device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101426067A (en) |
-
2007
- 2007-11-02 CN CNA2007101665021A patent/CN101426067A/en active Pending
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090506 |