EP0173413A2
Expired / Lapsed
EP
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Color image sensor
Assignee: Toshiba Corp
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Filing: 1985-05-22
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Granted: —
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Expires: 2005-05-22
Abstract
Abstract A contact type color image sensor reads out a document image at its actual size while moving along the length of the document. The photosensitive cell arrays, each having pixel electrodes (12a, 12b, 12c, 12d) which prescribe n photosensitive cells (where n is a positive integer), are aligned on the substrate (10). Filter films (22a, 22b, 22c) are positioned over the cell arrays. The radiated image light is converted into the three primary color components of red, green and blue, and R, G, B color signals necessary for color reproduction of the document image are obtained from the respective cell arrays. The n photosensitive cells are arranged at a predetermined pitch p along the main scanning direction (X) in each array, and the cell arrays are arranged at a sub-scanning direction (Y) pitch(q) which is larger than the pitch (p) by a factor of k (where k is larger than 1 and k X n is a natural number).
Inventors
- 👤 Toshio C/O Patent Division Nakai
- 👤 Tamio C/O Patent Division Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 23:57
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/191; H10F39/192; H04; H04N; H04N1/00; H04N1/46; H04N1/48; H04N1/486
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
A contact type color image sensor for reading out the actual size of a oocument image while moving in the lengthwise direction of the document, comprising, a plurality of photosensitive cell arrays (30, 32, 34) aligned at a predetermined first pitch q on a substrate (10), each having n photosensitive cells (12a, 12b, 12c) (where n is a positive integer), and filter means (22) positioned over said photosensitive cell arrays for receiving incident image light, filtering this light and radiating specific primary color light components onto said photosensitive cell arrays, whereby color signals of the primary colors necessary for reproduction of the color image of said document are output from the respective cell arrays, characterized in that said photosensitive cell arrays (30, 32, 34) are aligned on said substrate (10) at a predetermined first pitch (q), which is larger than the second pitch p of said n photosensitive cells (12a, 12b, or 12c) in each cell array by a factor of k, wherein k is larger than 1 and k X n is a natural number.
Claim 2
Dependent Claim
176 words
A contact type color image sensor for reading out the actual size of a oocument image while moving in the lengthwise direction of the document, comprising, a plurality of photosensitive cell arrays (30, 32, 34) aligned at a predetermined first pitch q on a substrate (10), each having n photosensitive cells (12a, 12b, 12c) (where n is a positive integer), and filter means (22) positioned over said photosensitive cell arrays for receiving incident image light, filtering this light and radiating specific primary color light components onto said photosensitive cell arrays, whereby color signals of the primary colors necessary for reproduction of the color image of said document are output from the respective cell arrays, characterized in that said photosensitive cell arrays (30, 32, 34) are aligned on said substrate (10) at a predetermined first pitch (q), which is larger than the second pitch p of said n photosensitive cells (12a, 12b, or 12c) in each cell array by a factor of k, wherein k is larger than 1 and k X n is a natural number.
Claim 3
Dependent Claim
40 words
The image sensor as recited in claim 1, characterized in that a side of each of said cell arrays (30, 32, 34) is substantially equal in length to the length of said document of the unit image to be read.
Claim 4
Dependent Claim
44 words
The image sensor as recited in claim 1 or 2, characterized in that said substrate (10) is an insulative material and that pixel electrodes (12) are aligned in rows on said insulative substrate (10), prescribing the cells of said cell arrays (30, 32, 34).
Claim 5
Dependent Claim
57 words
The image sensor as recited in claim 3, characterized in that a photoelectric converting layer (16) of amorphous semiconductor layer is formed covering said pixel electrodes (12) on said insulative substrate (10), and that a transparent conductive layer (18) functioning as a common electrode for said pixel electrodes (12) is formed on said photoelectric converting layer (16J.
Claim 6
Dependent Claim
57 words
The image sensor as recited in claim 1 or 4, characterized in that said plurality of signal delay means (52, 60, 66), for delaying the signals to compensate for the read out time difference between the color signals output from said cell arrays (32, 34, 36), are connected to said plurality of cell arrays (32, 34, 36).
Claim 7
Dependent Claim
54 words
The image sensor as recited in claim 5, characterized in that analog-to-digital converter means is provided between said cell arrays (30, 32, 34, 36) and said signal delay means (52, 60, 66), for digitizing the color signals output from said plurality of cell arrays (30, 32, 34, 36) to thereby generate digital color signals.
Claim 8
Dependent Claim
113 words
The image sensor as recited in claim 6, characterized in that said signal delay means includes delay registers (52, 60, 66) connected to the second and subsequent rows of said cell arrays (32, 34, 36), for respectively delaying the digital color signals read out from said second and subsequent rows of cell arrays (32, 34, 36) by time components corresponding to the read-out delays between the color signal read out from the first cell array (30) and the color signals read out from the second and subsequent cell arrays, whereby the read out timing of all the color signals from said cell arrays (30, 32, 34, 36) is made synchronous with each other.
Claim 9
Dependent Claim
28 words
The image sensor according to claim 7, characterized in that each signal delay occurring at said delay registers (52, 60, 66) is increased by a factor of k.
References Cited (Backward Citations)
No citation records indexed.
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