EP0298458A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image reading apparatus
Assignee: Canon Inc
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Filing: 1988-07-06
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Granted: —
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Expires: 2008-07-06
Abstract
Abstract There is provided a photo sensor for an image reading apparatus suitable for use in facsimile apparatus or image reader. This apparatus comprises: a light shielding layer arranged on the surface of a substrate which can transmit light; an insulative layer arranged on the light shielding layer; a photoconductive semiconductor layer arranged on the insulative layer; and protective layers arranged on the photoconductive semiconductor layer. The reflected light of the light irradiated onto the original surface from the back side of the substrate is received by the photoconductive semiconductor layer, thereby reading the image information. The light shielding means are provided on the sides of the substrate and protective layers. The light shielding means is made of substantially non-light transmitting organic resin and/or paint of a dark color. The image information is read by the one-dimensional line sensor which relatively moving the original in contact with the sensor. With this apparatus, the deterioration of the photo sensor by the stray lights is reduced and the good S/N ratio is obtained and the apparatus can be used for a long time.
Inventors
- 👤 Tetsuya Shimada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:51
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/198; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/0313; H04N1/0315; H04N1/0316; H10F39/191; H10F39/80; H10F39/805; H10F39/8057
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
106 words
A photo sensor for an image reading apparatus comprising: a light shielding layer arranged on the surface of a substrate which can transmit light; an insulative layer arrnaged on said light shielding layer; a photoconductive semiconductor layer arranged on said insulative layer; and protective layers arranged on said photoconductive semiconductor layer, wherein the reflected light of the light irradiated onto the surface of an original from the back side of the substrate is received by said photoconductive semiconductor layer, thereby reading image information, said photo sensor being provided with light shielding means on the sides of the substrate and on the sides of the protective layers.
Claim 2
Dependent Claim
106 words
A photo sensor for an image reading apparatus comprising: a light shielding layer arranged on the surface of a substrate which can transmit light; an insulative layer arrnaged on said light shielding layer; a photoconductive semiconductor layer arranged on said insulative layer; and protective layers arranged on said photoconductive semiconductor layer, wherein the reflected light of the light irradiated onto the surface of an original from the back side of the substrate is received by said photoconductive semiconductor layer, thereby reading image information, said photo sensor being provided with light shielding means on the sides of the substrate and on the sides of the protective layers.
Claim 3
Dependent Claim
21 words
A photo sensor according to Claim 1, wherein said light shielding means is made of a substantially non-light transmitting organic resin.
Claim 4
Dependent Claim
20 words
A photo sensor according to Claim 1, wherein said light shielding means is made of a substantially non-light transmitting paint.
Claim 5
Dependent Claim
20 words
A photo sensor according to Claim 2, wherein a color of said organic resin is set to a dark color.
Claim 6
Dependent Claim
19 words
A photo sensor according to Claim 3, wherein a color of said paint is set to a dark color.
Claim 7
Dependent Claim
59 words
A photo sensor for an image reading apparatus comprising: a light shielding layer arranged on a substrate which can transmit light; a photo sensor formed directly on or formed indirectly over said light shielding layer; and protective layers arranged on said photo sensor, wherein light shielding means are provided for the sides of said substrate and said protective layers.
Claim 8
Dependent Claim
59 words
A photo sensor for an image reading apparatus comprising: a light shielding layer arranged on a substrate which can transmit light; a photo sensor formed directly on or formed indirectly over said light shielding layer; and protective layers arranged on said photo sensor, wherein light shielding means are provided for the sides of said substrate and said protective layers.
Claim 9
Dependent Claim
21 words
A photo sensor according to Claim 6, wherein said light shielding means is made of a substantially non-light transmitting organic resin.
Claim 10
Dependent Claim
20 words
A photo sensor according to Claim 6, wherein said light shielding means is made of a substantially non-light transmitting paint.
Claim 11
Dependent Claim
20 words
A photo sensor according to Claim 7, wherein a color of said organic resin is set to a dark color.
Claim 12
Dependent Claim
19 words
A photo sensor according to Claim 8, wherein a color of said paint is set to a dark color.
Claim 13
Dependent Claim
24 words
A photo sensor according to Claim 6, wherein said light shielding means is provided at least parts of the surfaces of said protective layers.
Claim 14
Dependent Claim
95 words
A reading apparatus comprising: an image reading apparatus having (a) a light shielding layer arranged on the surface of a substrate which can transmit light, (b) a photo sensor formed directly on or formed indirectly over said light shielding layer, (c) protective layers arranged on said photo sensor, and (d) light shielding means provided on the sides of said substrate and/or said protective layers; moving means for relatively moving said original for said image reading apparatus in close vicinity to or in contact with said protective layers and a light source to illuminate the original.
Claim 15
Dependent Claim
95 words
A reading apparatus comprising: an image reading apparatus having (a) a light shielding layer arranged on the surface of a substrate which can transmit light, (b) a photo sensor formed directly on or formed indirectly over said light shielding layer, (c) protective layers arranged on said photo sensor, and (d) light shielding means provided on the sides of said substrate and/or said protective layers; moving means for relatively moving said original for said image reading apparatus in close vicinity to or in contact with said protective layers and a light source to illuminate the original.
Claim 16
Dependent Claim
22 words
A reading apparatus according to Claim 12, wherein said light shielding means is made of substantially non-light transmitting organic resin and/or paint.
Claim 17
Dependent Claim
21 words
A reading apparatus according to Claim 13, wherein a color of said light shielding means is set to a dark color.
Claim 18
Dependent Claim
14 words
A reading apparatus according to Claim 12, wherein said light source is an LED.
Claim 19
Dependent Claim
15 words
A reading apparatus according to Claim 12, wherein said light source is a discharge tube.
Claim 20
Dependent Claim
16 words
A reading apparatus according to Claim 16, wherein said discharge tube is a xenon glow lamp.
Claim 21
Dependent Claim
18 words
A reading apparatus according to Claim 12, further having a lamp protective member to cover said light source.
Claim 22
Dependent Claim
15 words
A reading apparatus according to Claim 18 wherein said light source is a discharge tube.
Claim 23
Dependent Claim
24 words
A reading apparatus according to Claim 18, wherein said light source is a discharge tube and said lamp protective member has a conductive material.
Claim 24
Dependent Claim
16 words
A reading apparatus according to Claim 20, wherein said lamp protective member is made of metal.
Claim 25
Dependent Claim
32 words
A reading apparatus according to Claim 18 wherein said lamp protective member is supported to a holding member which has a slit to irradiate the light and holds the image reading apparatus.
Claim 26
Dependent Claim
22 words
A reading apparatus according to Claim 12, wherein said light shielding means are further formed on the surfaces of the protective layers.
References Cited (Backward Citations)
No citation records indexed.
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