US4908718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image reading apparatus having a light shielding layer arranged on the sides of the substrate and protective layers of a photo sensor
Assignee: Canon Inc
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Filing: 1988-06-30
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Granted: 1990-03-13
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Expires: 2008-06-30
Abstract
Abstract A photosensor for an image reading apparatus includes a light-transmissive substrate, a light shielding layer arranged on a portion of the surface of the substrate, and a photosensor formed over the light shielding layer. Protective layers are arranged on the surface of the photosensor. Light shielding structure is provided on the sides of the substrate and/or the sides of the protective layers to prevent stray light from entering the side of the photosensor.
Inventors
- 👤 Tetsuya Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:28
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: 40
Claim 1
Independent Claim
97 words
A photo sensor for an image reading apparatus, comprising: a light-transmissive substrate; a light shielding layer arranged on a portion of a surface of said substrate; an insulative layer arranged on said light shielding layer; a photoconductive semiconductor layer arranged on said insulative layer; protective layers arranged on said photoconductive semiconductor layer, wherein light irradiated through a back side of the substrate is reflected from an original and received by said photoconductive semiconductor layer, thereby reading image information; and light shielding means provided on the sides of the substrate and on the sides of the protective layers.
Claim 2
Dependent Claim
97 words
A photo sensor for an image reading apparatus, comprising: a light-transmissive substrate; a light shielding layer arranged on a portion of a surface of said substrate; an insulative layer arranged on said light shielding layer; a photoconductive semiconductor layer arranged on said insulative layer; protective layers arranged on said photoconductive semiconductor layer, wherein light irradiated through a back side of the substrate is reflected from an original and received by said photoconductive semiconductor layer, thereby reading image information; and light shielding means provided on the sides of the substrate and on the sides of the protective layers.
Claim 3
Dependent Claim
19 words
A photo sensor according to claim 1, wherein said light shielding means comprises a substantially non-light transmitting organic resin.
Claim 4
Dependent Claim
18 words
A photo sensor according to claim 1, wherein said light shielding means comprises a substantially non-light transmitting paint.
Claim 5
Dependent Claim
18 words
A photo sensor according to claim 2, wherein a color of said organic resin is a dark color
Claim 6
Dependent Claim
17 words
A photo sensor according to claim 3, wherein a color of said paint is a dark color.
Claim 7
Dependent Claim
15 words
A photosensor according to claim 1, wherein said photoconductive semiconductor layer comprises an amorphous silicon.
Claim 8
Dependent Claim
25 words
A photosensor according to claim 1 wherein said protective layers are selected from a group consisting of an inorganic thin film and an organic film.
Claim 9
Dependent Claim
18 words
A photosensor according to claim 7, wherein said inorganic thin film comprises one of SiO 2 and SiNH.
Claim 10
Dependent Claim
20 words
A photosensor according to claim 8, wherein said organic film comprises one of a polyimide resin and an epoxy resin.
Claim 11
Dependent Claim
57 words
A photo sensor for an image reading apparatus, comprising: a light-transmissive substrate; a light shielding layer arranged on a surface of said substrate; a photo sensor formed over said light shielding layer; protective layers arranged on said photo sensor; and light shielding means provided on the sides of said substrate and the sides of said protective layers.
Claim 12
Dependent Claim
57 words
A photo sensor for an image reading apparatus, comprising: a light-transmissive substrate; a light shielding layer arranged on a surface of said substrate; a photo sensor formed over said light shielding layer; protective layers arranged on said photo sensor; and light shielding means provided on the sides of said substrate and the sides of said protective layers.
Claim 13
Dependent Claim
19 words
A photo sensor according to claim 10, wherein said light shielding means comprises a substantially non-light transmitting organic resin.
Claim 14
Dependent Claim
18 words
A photo sensor according to claim 10, wherein said light shielding means comprises a substantially non-light transmitting paint.
Claim 15
Dependent Claim
18 words
A photo sensor according to claim 11, wherein a color of said organic resin is a dark color.
Claim 16
Dependent Claim
17 words
A photo sensor according to claim 12, wherein a color of said paint is a dark color.
Claim 17
Dependent Claim
25 words
A photo sensor according to claim 10, wherein said light shielding means is provided on at least parts of the surfaces of said protective layers.
Claim 18
Dependent Claim
14 words
A photosensor according to claim 10, wherein said photosensor has a photoconductive semiconductor layer.
Claim 19
Dependent Claim
15 words
A photosensor according to claim 10, wherein said photoconductive semiconductor layer comprises an amorphous silicon.
Claim 20
Dependent Claim
24 words
A photosensor according to claim 10, wherein said protective layers are selected from a group consisting of inorganic thin film and an organic film.
Claim 21
Dependent Claim
18 words
A photosensor according to claim 18, wherein said inorganic thin film comprises one of SiO 2 and SiNH.
Claim 22
Dependent Claim
20 words
A photosensor according to claim 18, wherein said organic film comprises one of a polyimide resin and an epoxy resin.
Claim 23
Dependent Claim
94 words
A reading apparatus comprising: an image reading apparatus having a light transmissive substrate, (b) a light shielding layer arranged on a surface of said substrate, (c) a photo sensor formed over said light shielding layer, (d) protective layers arranged on said photo sensor, and (e) light shielding means provided on the sides of said substrate and/or said protective layers; moving means for relatively moving an original with respect to said reading apparatus such that the original is proximate to or in contact with said protective layers; and a light source to illuminate the original.
Claim 24
Dependent Claim
94 words
A reading apparatus comprising: an image reading apparatus having a light transmissive substrate, (b) a light shielding layer arranged on a surface of said substrate, (c) a photo sensor formed over said light shielding layer, (d) protective layers arranged on said photo sensor, and (e) light shielding means provided on the sides of said substrate and/or said protective layers; moving means for relatively moving an original with respect to said reading apparatus such that the original is proximate to or in contact with said protective layers; and a light source to illuminate the original.
Claim 25
Dependent Claim
21 words
A reading apparatus according to claim 21, wherein said light shielding means comprises a substantially non-light transmitting organic resin and/or paint.
Claim 26
Dependent Claim
19 words
A reading apparatus according to claim 22, wherein a color of said light shielding means is a dark color.
Claim 27
Dependent Claim
14 words
A reading apparatus according to claim 21, wherein said light source comprises an LED.
Claim 28
Dependent Claim
15 words
A reading apparatus according to claim 21, wherein said light source comprises a discharge tube.
Claim 29
Dependent Claim
16 words
A reading apparatus according to claim 25, wherein said discharge tube comprises a xenon glow lamp.
Claim 30
Dependent Claim
17 words
A reading apparatus according to claim 21, further comprising a lamp protective member covering said light source.
Claim 31
Dependent Claim
15 words
A reading apparatus according to claim 27, wherein said light source comprises a discharge tube.
Claim 32
Dependent Claim
23 words
A reading apparatus claim 27, wherein said light source comprises a discharge tube, and wherein said lamp protective member includes a conductive material.
Claim 33
Dependent Claim
14 words
A reading apparatus according to claim 29, wherein said lamp protective member comprises metal.
Claim 34
Dependent Claim
31 words
A reading apparatus according to claim 27, wherein said lamp protective member is coupled to a holding member which holds the image reading apparatus and has a slit to pass light.
Claim 35
Dependent Claim
22 words
A reading apparatus according to claim 21, wherein said light shielding means are further formed on the surfaces of the protective layers.
Claim 36
Dependent Claim
14 words
A photosensor according to claim 21, wherein said photosensor has a photoconductive semiconductor layer.
Claim 37
Dependent Claim
15 words
A photosensor according to claim 33, wherein said photoconductive semiconductor layer comprises an amorphous silicon.
Claim 38
Dependent Claim
25 words
A photosensor according to claim 21, wherein said protective layers are selected from a group consisting of an inorganic thin film and an organic film.
Claim 39
Dependent Claim
18 words
A photosensor according to claim 35, wherein said inorganic thin film is one of SiO 2 and SiNH.
Claim 40
Dependent Claim
20 words
A photosensor according to claim 35, wherein said organic film comprises one of a polyimide resin and an epoxy resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |