CN101388940B - High brightness touch-type image sensor - Google Patents
High brightness touch-type image sensor Download PDFInfo
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- CN101388940B CN101388940B CN 200710112888 CN200710112888A CN101388940B CN 101388940 B CN101388940 B CN 101388940B CN 200710112888 CN200710112888 CN 200710112888 CN 200710112888 A CN200710112888 A CN 200710112888A CN 101388940 B CN101388940 B CN 101388940B
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- light
- bucking ladder
- lens
- truncated pyramid
- passing board
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Abstract
The invention discloses a high illuminance contact type image sensor, which comprises a sensor base plate, sensitizing components arranged on the sensor base plate in line; lenses disposed on the sensitizing components on the sensor base plate, light sources disposed on one side of the lens, a frame capable of containing the sensor base plate, the lenses and the light sources and a light-passing board for carrying original copy disposed on the upper part of the frame. The invention is characterized in that: a truncated pyramid is disposed on the inner surface of the light-passing board; the truncated pyramid is arranged on the location of the light-passing board inner surface relative to the lens; the height of the truncated pyramid is less than the height from the truncated pyramid to the upper surface of the lens in order to allow the truncated pyramid not to get to the upper surface of the lens; the lateral surface close to the light source of the truncated pyramid is light incidence surface, while the lateral surface far from the light source of the truncated pyramid is light reflection surface; the truncated pyramid is positioned relative to the lenses ensuring the light incidence surface of the truncated pyramid is perpendicular to the emitting direction of the light from the light source; a light-reflectance apparatus is disposed on the light reflection surface of the truncated pyramid. The invention increases the intensity of the light shot onto the original copy, reduces the influence of the scattered lights, and improves the image reading quality.
Description
Technical field
The present invention relates to a kind of image read-out, is a kind of high brightness touch-type image sensor specifically.
Background technology
Fig. 4 is the sectional drawing of existing contact-type image sensor, 1 is illuminating source among the figure, the 2nd, lens, the 3rd, the photographic department (photosensitive integrated circuit) of receiver lens 2 light that converges, the 4th, the sensor base plate of the photosensitive integrated circuit 3 that lift-launch is arranged in a straight line, the 6th, hold the framework of light source 1, lens 2, sensor base plate 4,5 are arranged on the light-passing board of the lift-launch original copy on the framework 6, and 10 is original copy.
In above-mentioned contact-type image sensor, the light that light source 1 sends, see through light-passing board 5, shine on the original copy 10 of outside, the literal black region light on the original copy 10 is absorbed, and in other white undercolor region of original copy, light almost 100% is reflected, these reverberation pass glass plate 5 again, are collected by lens 2, shine the photosensitive area of the photographic department 3 on the sensor base plate 4.Photographic department 3 be by many photosensitive areas and can will shine the light of each photosensitive area carry out opto-electronic conversion, and the drive circuit of signal output is formed.The light that receives converts telecommunications to and exports by overdrive circuit, outwards exports as image (literal) information.Original copy is constantly mobile, and the image information of putting down in writing on it (literal) will be read continuously.
There is following problem in the above-mentioned contact-type image sensor: the one, the light that light source sends at first will be through refraction and the reflection of light-passing board inner surface in shining the process of original copy.The light that enters light-passing board inside through superrefraction could continue the directive original copy, and has just lost through reflecting the light that leaves light-passing board.The 2nd, reflecting the light that enters light-passing board through inner surface also will be through refraction and the reflection of light-passing board outer surface in the process of irradiation original copy, the light that leaves light-passing board through outer surface refraction just can shine on the original copy, and the light that reflects back into light-passing board inside has also lost.Therefore through the loss of light-passing board surfaces externally and internally two secondary reflections, greatly reduce the utilance of light, the actual luminous intensity that shines on the original copy is reduced greatly, affected the quality of image reading.
Summary of the invention
Technical problem to be solved by this invention is: overcome the many problems of existing contact-type image sensor light loss, propose a kind of high brightness touch-type image sensor of high illumination.
The present invention can reach by following measure.
A kind of high brightness touch-type image sensor, comprise sensor base plate, carry the photosensitive integrated circuit that is arranged in a straight line on the sensor base plate, it is photographic department, be provided with lens above the photographic department on the sensor base plate, one side of lens is provided with light source, and can hold the sensor substrate, lens, the framework of light source, the top of framework is provided with the light-passing board that carries original copy, it is characterized in that being provided with bucking ladder at the light-passing board inner surface, the position of bucking ladder is located on the light-passing board inner surface position corresponding with lens, the height of bucking ladder with the thickness of light-passing board and inner space and different, the height of bucking ladder is provided so that bucking ladder can not touch the upper surface of lens, the side of the close light source of bucking ladder is light entrance face, side away from light source is light reflection surface, and the light entrance face of bucking ladder penetrates on the direction of perpendicular direction at the light of light source, and the light reflection surface of bucking ladder is provided with reflex reflector.
The above-mentioned bucking ladder that is arranged on the light-passing board inner surface, the plane of incidence of its light and reflection of light face can be the planes, also can be curve forms.
The above-mentioned reflex reflector that is arranged on the bucking ladder light reflection surface can be reflector, also can be the reflecting coating layer of white.
The present invention is owing to the inner surface at light-passing board is provided with bucking ladder, the position of bucking ladder is on the position corresponding with lens, the light entrance face of bucking ladder is on the direction of the ejaculation perpendicular direction of the light of light source, so light from the light source ejaculation, when arriving the bucking ladder of light-passing board inner surface, light is inner through the direct directive light-passing board of the light entrance face of bucking ladder, has prevented the catoptrical loss of original light-passing board inner surface, has improved the light intensity that shines on the original copy.
The present invention is owing to the light reflection surface at bucking ladder is provided with reflex reflector, make the light-passing board outer surface reflect back into the light reflection surface of the light directive bucking ladder of light-passing board inside, light reflection surface is reflected back the original copy position with these light again, prevent the catoptrical loss of original light-passing board outer surface, improved the light intensity that shines on the original copy.
Description of drawings
Fig. 1 is the sectional schematic diagram of a kind of contact-type image sensor of the present invention.
Fig. 2 is the sectional schematic diagram of light-passing board among the present invention.
Fig. 3 is the sectional schematic diagram of another kind of light-passing board among the present invention.
Fig. 4 is that this is the sectional drawing of existing contact-type image sensor.
Mark among the figure: the bucking ladder on 1 light source, 2 lens, 3 photographic departments, 4 sensor base plates, 5 light-passing boards, 6 frameworks, 7 light-passing boards, 8 reflex reflectors, 10 original copys
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Shown in Figure 1 such as accompanying drawing, the 1st, illuminating source, the 2nd, lens, the 3rd, the photographic department of receiver lens 2 light that converges, it is photosensitive integrated circuit, the 4th, the sensor base plate of the photosensitive integrated circuit 3 that lift-launch is arranged in a straight line, the 6th, hold light source 1, lens 2, the framework of sensor base plate 4,5 are arranged on the light-passing board of the lift-launch original copy on framework 6 tops, the structure of above-mentioned each part and the interconnected relationship between them are same as the prior art, this does not give unnecessary details, 7 is the bucking ladder that arranges on the light-passing board 5 among the present invention, the side of the close light source of bucking ladder 7 is light entrance face, side away from light source is light reflection surface, bucking ladder 7 is located on the corresponding position of light-passing board 5 inner faces and lens 2, the light entrance face of bucking ladder 7 penetrates on the direction of perpendicular direction at the light of light source, it is perpendicular that the light that is to say the light entrance face of bucking ladder 7 and light source penetrates direction, and light entrance face and light reflection surface can be plane (as shown in Figure 2), also can adopt curved surface shaped (as shown in Figure 3) or other shape, the height of bucking ladder 7 can be with the size of the thickness of light-passing board and inner space and difference, the height of bucking ladder 7 is provided so that bucking ladder can not touch the upper surface of lens, but can not touch the upper surface of lens, the light reflection surface of bucking ladder 7 is provided with reflex reflector 8, reflex reflector 8 can be provided in a side of the reflector on the light reflection surface of bucking ladder 7, also can be provided in a side of the white reflection layer that light is had reflex on the light reflection surface of bucking ladder 7, the material of white reflection layer can adopt white ink, dope layer and adhesive tape etc.
The light that light source 1 of the present invention sends, in seeing through the process of light-passing board 5 directive original copys, at first pass through bucking ladder 7, because the light that the light entrance face of bucking ladder 7 is arranged on light source penetrates on the direction of perpendicular direction, so during the light entrance face of light process bucking ladder, light almost all passes the light entrance face directive light-passing board inside of bucking ladder 7, has eliminated the reverberation of original light-passing board inner surface, has improved the utilance of light.In addition owing to the light reflection surface at bucking ladder is provided with reflex reflector, make the light-passing board outer surface reflect back into the light reflection surface of the light directive bucking ladder of light-passing board inside, light reflection surface is reflected back the original copy position with these light again, reduced the catoptrical loss of original light-passing board outer surface, improve the light intensity that shines on the original copy, improved the reading quality of image.
Illumination of the present invention is mapped on the original copy, literal black region light on the original copy is absorbed, and in other white undercolor region of original copy, light almost 100% is reflected, these reverberation pass glass plate 5 again, collected by lens 2 through bucking ladder 7, shine the photosensitive area of the photographic department 3 on the sensor base plate 4.Photographic department 3 be by many photosensitive areas and can will shine the light of each photosensitive area carry out opto-electronic conversion, and the drive circuit of signal output is formed.The light that receives converts telecommunications to and exports by overdrive circuit, outwards exports as image (literal) information.Original copy is constantly mobile, and the image information of putting down in writing on it (literal) will be read continuously.
Claims (5)
1. high brightness touch-type image sensor, comprise sensor base plate, carry the photographic department that is arranged in a straight line on the sensor base plate, be provided with lens above the photographic department on the sensor base plate, one side of lens is provided with light source, and can hold the sensor substrate, lens, the framework of light source, the top of framework is provided with the light-passing board that carries original copy, the inner surface that it is characterized by light-passing board is provided with bucking ladder, bucking ladder is arranged on the light-passing board inner surface position corresponding with lens, the height of bucking ladder is provided so that bucking ladder can not touch the upper surface of lens, the side of the close light source of bucking ladder is light entrance face, side away from light source is light reflection surface, and it is perpendicular that the light entrance face of bucking ladder and light source light penetrate direction, and the light reflection surface of bucking ladder is provided with reflex reflector.
2. a kind of high brightness touch-type image sensor according to claim 1 is characterized in that the light entrance face of bucking ladder and light reflection surface are the planes.
3. a kind of high brightness touch-type image sensor according to claim 1 is characterized in that the light entrance face of bucking ladder and light reflection surface are curved surfaces.
4. a kind of high brightness touch-type image sensor according to claim 1 is characterized in that the reflex reflector that arranges on the light reflection surface of bucking ladder is reflector.
5. a kind of high brightness touch-type image sensor according to claim 1 is characterized in that the reflex reflector that arranges on the light reflection surface of bucking ladder is the reflecting coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710112888 CN101388940B (en) | 2007-09-13 | 2007-09-13 | High brightness touch-type image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710112888 CN101388940B (en) | 2007-09-13 | 2007-09-13 | High brightness touch-type image sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101388940A CN101388940A (en) | 2009-03-18 |
| CN101388940B true CN101388940B (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710112888 Active CN101388940B (en) | 2007-09-13 | 2007-09-13 | High brightness touch-type image sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101388940B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324177A (en) * | 2000-05-16 | 2001-11-28 | 三菱电机株式会社 | Contact type image sensor |
| CN2622867Y (en) * | 2003-05-28 | 2004-06-30 | 山东华菱电子有限公司 | Contact image sensor |
| CN2622780Y (en) * | 2003-03-12 | 2004-06-30 | 山东华菱电子有限公司 | Contact image sensor |
| CN1678012A (en) * | 2004-03-31 | 2005-10-05 | 三菱电机株式会社 | Image sensor |
-
2007
- 2007-09-13 CN CN 200710112888 patent/CN101388940B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324177A (en) * | 2000-05-16 | 2001-11-28 | 三菱电机株式会社 | Contact type image sensor |
| CN2622780Y (en) * | 2003-03-12 | 2004-06-30 | 山东华菱电子有限公司 | Contact image sensor |
| CN2622867Y (en) * | 2003-05-28 | 2004-06-30 | 山东华菱电子有限公司 | Contact image sensor |
| CN1678012A (en) * | 2004-03-31 | 2005-10-05 | 三菱电机株式会社 | Image sensor |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-28487A 2007.02.01 |
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| Publication number | Publication date |
|---|---|
| CN101388940A (en) | 2009-03-18 |
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Address after: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159 Applicant after: Weihai Hualing Opto-electronics Co.,Ltd. Address before: 264200 Torch Road, hi tech Industrial Development Zone, Shandong, Weihai 159 Applicant before: Weihai Hualing Optoelectronic Co., Ltd. |
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