CN101370068B - Contact type image sensor with high reading quality and low cost - Google Patents
Contact type image sensor with high reading quality and low cost Download PDFInfo
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- CN101370068B CN101370068B CN2007100164849A CN200710016484A CN101370068B CN 101370068 B CN101370068 B CN 101370068B CN 2007100164849 A CN2007100164849 A CN 2007100164849A CN 200710016484 A CN200710016484 A CN 200710016484A CN 101370068 B CN101370068 B CN 101370068B
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Abstract
The invention discloses a high reading quality low-cost contact type image sensor including sensor substrate carried with aligned photosensitive part; a lens is provided upper of the photosensitive part; a light source and frame accommodating the sensor substrate, lens and light source are provided at side of lens; a transparent board for carrying original copy is provided upper of the frame characterized in that a V-type groove is provided at inner surface of the transparent board, that is, the V-type groove is at surface of transparent board accommodated in frame; and V-type groove is positioned at symmetrical position of ejection direction of light source using lens central line as axis; a reflector is provided in V-type groove. The inventive image sensor promotes the light intensity of irradiated light to original copy, which can not result in shadow and promote image reading quality even if original copy is unsmooth or crimpled.
Description
Technical field:
The present invention relates to a kind of image read-out, is a kind of contact type image sensor with high reading quality and low cost specifically.
Background technology:
Fig. 5 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 after overdrive circuit output is outwards exported as image (literal) information.Original copy constantly moves, and the image information of being put down in writing on it (literal) will be read continuously.
There is following problem in the above-mentioned contact-type image sensor: the one, along with the raising of reading speed, the luminous intensity of required light source is also big more, and the common intensity of light source does not satisfy the requirement of reading at a high speed, has limited the raising of reading speed; The 2nd, if the original copy that is read is uneven or fold is arranged, on the image that reads out shade will appear, influence the reading quality of image.Addressing the above problem the common practice now is the luminous intensity that improves light-emitting diode in the light source, the quantity that increases light-emitting diode in the light source, the two light sources of use etc., but these methods all need to increase a lot of costs of manufacture, have limited the development of product.
Summary of the invention:
Technical problem to be solved by this invention is: overcome existing contact-type image sensor need increase a lot of costs of manufacture when reading at a high speed problem, propose a kind of contact type image sensor with high reading quality and low cost.
The present invention can reach by following measure:
A kind of contact type image sensor with high reading quality and low cost, 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 groove at the light-passing board inner surface, the surface that promptly is contained in framework the inside light-passing board is provided with groove, and the center line that groove is located at lens is an axis, the light of light source penetrates on the symmetrical position of direction, is provided with reflex reflector in the groove.
The above-mentioned groove that is arranged at the light-passing board inner surface, its cross sectional shape can triangles, and triangle can be an isosceles triangle, also can be common triangle, and the cross sectional shape of groove also can be hemisphere and curved surface shaped.
The degree of depth of the above-mentioned groove that is arranged at the light-passing board inner surface is different with the thickness of light-passing board, but maximum 80% of the light-passing board thickness that is no more than.
The above-mentioned reflex reflector that is arranged in the groove is the reflector that light is had reflex, also can be provided in a side of the reflective bar in the groove 8, can also be the ink lay, dope layer, adhesive tape etc. of white.
The above-mentioned reflex reflector that is arranged in the groove can be arranged in the groove, also can only be arranged in the groove near on the surface of lens.
The present invention is owing to the inner surface at light-passing board, be axis and penetrate on the symmetrical position of direction with the light of light source and to be provided with groove with the center line of lens, and in groove, be provided with reflex reflector, so light from the light source ejaculation, in the time of on arrive light-passing board, a part outwards penetrates, and shine on the original copy, and a part reflects back into light-passing board inside in addition.This a part of light of reflected back light-passing board inside is invalid originally, but owing on light-passing board, be provided with groove, and in groove, be provided with reflex reflector, this a part of light is through the reflection on the surface of close lens one side of groove, be fed back into reading on the position on the original copy again, improved the light intensity that shines on the original copy, even original copy is uneven or fold arranged, can not form shade yet, improve the reading quality of image.
Description of drawings:
Fig. 1 is a kind of sectional schematic diagram 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 an another kind of sectional schematic diagram of the present invention.
Fig. 5 is this sectional drawing for existing contact-type image sensor.
Mark among the figure: 1 light source, 2 lens, 3 photographic departments, 4 sensor base plates, 5 light-passing boards, 6 frameworks, 7 reflex reflectors, 8 grooves, 10 original copys
Embodiment:
Below in conjunction with accompanying drawing the present invention is further described:
As shown in drawings, 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, 8 is the groove that is provided with on the light-passing board 5 among the present invention, the center line that groove 8 is located at lens 2 is an axis, the light of light source 1 penetrates on the symmetrical position of direction, the cross sectional shape of groove 8 can be triangle (as shown in Figure 2), also can adopt hemisphere (as shown in Figure 3) or other shape, the degree of depth of groove 8 is no more than 80% of light-passing board 5 thickness, be provided with reflex reflector 7 in the groove 8, reflex reflector 7 can be provided in a side of the reflector in the groove 8, also can be provided in a side of the reflective bar (as shown in Figure 1) in the groove 8, can also be that reflectorized material is coated in the reflector layer (as shown in Figure 4) that forms on the cell wall of groove 8, reflector layer can be coated on the whole groove inwall, be coated in the groove 8 and also have same effect near on the surfaces of lens one side, reflectorized material can adopt white ink, whitewash layer and adhesive tape etc.
The light that light source 1 of the present invention sends, see through light-passing board 5, when arriving light-passing board 5 top, a part outwards penetrates as transmitted light, shine on the original copy 10, and a part reflects back into light-passing board 5 inside as reverberation in addition, this a part of light of reflected back light-passing board 5 inside is invalid originally, but owing on light-passing board 5, be provided with groove 8, and in groove 8, be provided with reflex reflector 7, this a part of light is through the reflection on the surface of close lens one side of groove 8, form reverberation again, turn back to original copy again and read the position, shine on the original copy 10 of outside, thereby improved the light intensity that shines on the original copy.And reflex to only directive original copy on two symmetrical directions on the original copy from the light of the direct directive original copy of light source with from groove 8,, also can not form shade, improved the reading quality of image even therefore original copy is uneven or fold is arranged.
Illumination of the present invention is mapped on the original copy, and the 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, 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 after overdrive circuit output is outwards exported as image (literal) information.Original copy constantly moves, and the image information of being put down in writing on it (literal) will be read continuously.
Claims (7)
1. contact type image sensor with high reading quality and low cost, 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 the framework that can hold the sensor substrate, lens, light source, the top of framework is provided with the light-passing board that carries original copy, it is characterized in that on the light-passing board inner surface, being provided with groove, the center line with lens that groove is located at the light-passing board inner surface is on the symmetrical position of axis and light source, is provided with reflex reflector in the groove.
2. a kind of contact type image sensor with high reading quality and low cost according to claim 2 is characterized in that said reflex reflector is the reflector that light is had reflex.
3. a kind of contact type image sensor with high reading quality and low cost according to claim 2 is characterized in that said reflex reflector is the reflective bar that light is had reflex.
4. a kind of contact type image sensor with high reading quality and low cost according to claim 2 is characterized in that said reflex reflector is to be coated on the groove inwall has reflex to light dope layer.
5. a kind of contact type image sensor with high reading quality and low cost according to claim 1, the cross sectional shape that it is characterized in that said groove is a triangle.
6. a kind of contact type image sensor with high reading quality and low cost according to claim 1, the cross sectional shape that it is characterized in that said groove is a hemisphere face shape.
7. a kind of contact type image sensor with high reading quality and low cost according to claim 1 is characterized in that the degree of depth maximum of said groove is no more than 80% of light-passing board thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100164849A CN101370068B (en) | 2007-08-14 | 2007-08-14 | Contact type image sensor with high reading quality and low cost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100164849A CN101370068B (en) | 2007-08-14 | 2007-08-14 | Contact type image sensor with high reading quality and low cost |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101370068A CN101370068A (en) | 2009-02-18 |
| CN101370068B true CN101370068B (en) | 2011-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100164849A Active CN101370068B (en) | 2007-08-14 | 2007-08-14 | Contact type image sensor with high reading quality and low cost |
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| Country | Link |
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| CN (1) | CN101370068B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098409B (en) * | 2009-12-10 | 2015-04-15 | 鸿富锦精密工业（深圳）有限公司 | Contact image sensing module |
| CN103916563B (en) * | 2013-01-09 | 2016-12-28 | 菱光科技股份有限公司 | Contact image sensing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210416A (en) * | 1997-08-29 | 1999-03-10 | 三菱电机株式会社 | Image sensor |
| CN1343955A (en) * | 2001-07-13 | 2002-04-10 | 山东华菱电子有限公司 | Touch-type image sensor |
-
2007
- 2007-08-14 CN CN2007100164849A patent/CN101370068B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210416A (en) * | 1997-08-29 | 1999-03-10 | 三菱电机株式会社 | Image sensor |
| CN1343955A (en) * | 2001-07-13 | 2002-04-10 | 山东华菱电子有限公司 | Touch-type image sensor |
Non-Patent Citations (2)
| Title |
|---|
| JP昭58-105668A 1983.06.23 |
| JP特开平6-276357A 1994.09.30 |
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| Publication number | Publication date |
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| CN101370068A (en) | 2009-02-18 |
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Owner name: WEIHAI HUALING OPTO-ELECTRONICS CO., LTD. Free format text: FORMER NAME: WEIHAI HUALING OPTOELECTRONIC CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159 Patentee after: Weihai Hualing Opto-electronics Co.,Ltd. Address before: Torch Road high tech Industrial Development Zone, Weihai city of Shandong Province, No. 159 264209 Patentee before: Weihai Hualing Optoelectronic Co., Ltd. |