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Photosensor

Assignee: Hitachi Ltd
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Filing: 1982-09-22
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Granted: —
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Expires: 2002-09-22
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Abstract

Abstract A photosensor comprises a first conductive layer (8) formed on a given substrate (7), a one-dimensional array of a plurality of unit picture elements formed on the first conductive layer to extend in the longitudinal direction thereof, each unit picture element having a photodiode (Dp) and a blocking diode (D B ) connected in series with the photodiode in a relationship of reversed rectifying direction therewith, a second conductive layer (11) for connecting together, at one end, respective unit picture elements belonging to each of at least two unit picture element groups having each at least two of adjacent unit picture elements, and a third conductive layer (11') for connecting together, at the other end, corresponding with picture elements in the respective groups, the set of the photodiode and blocking diode in the respective groups being made of the same semiconductor material (10). Dispersion of outputs from the respective unit picture elements can be minimized.

Inventors

  • 👤 Hideaki Yamamoto
  • 👤 Toru Baji
  • 👤 Toshihisa Tsukada
  • 👤 Akira Sasano

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 14:10
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/18; H04; H04N; H04N1/00; H04N1/40; H04N1/40056; H04N25/00; H04N25/70; H04N25/701

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 144 words
A photosensor comprising: a first conductive layer (8) formed on a predetermined substrate (7); a one-dimensional array of a plurality of unit picture elements formed on the first conductive layer to extend in the longitudinal direction thereof, each unit picture element having a photodiode (D ) and a blocking diode (D B ) connected in series with the photodiode in a relationship of reversed rectifying direction therewith; a second conductive layer (11) for connecting together, at one end, respective unit picture elements belonging to each of at least two unit picture element groups having each at least two of adjacent unit picture elements; and a third conductive layer (11') for connecting together, at the other end, corresponding unit picture elements in the respective groups, the set of the photodiode and blocking diode in the respective groups being made of the same semiconductor material (10).
Claim 2
Dependent Claim 144 words
A photosensor comprising: a first conductive layer (8) formed on a predetermined substrate (7); a one-dimensional array of a plurality of unit picture elements formed on the first conductive layer to extend in the longitudinal direction thereof, each unit picture element having a photodiode (D ) and a blocking diode (D B ) connected in series with the photodiode in a relationship of reversed rectifying direction therewith; a second conductive layer (11) for connecting together, at one end, respective unit picture elements belonging to each of at least two unit picture element groups having each at least two of adjacent unit picture elements; and a third conductive layer (11') for connecting together, at the other end, corresponding unit picture elements in the respective groups, the set of the photodiode and blocking diode in the respective groups being made of the same semiconductor material (10).
Claim 3
Dependent Claim 15 words
A photosensor according to Claim 1, wherein said semiconductor film comprises an amorphous silicon film.
Claim 4
Dependent Claim 32 words
A photosensor according to Claim 1 or 2 wherein said blocking diode and photodiode have a width in the direction of array which is smaller than that of said first conductive layer.
Claim 5
Dependent Claim 27 words
A photosensor according to Claim 1 or 2 wherein an electrode for connecting said photodiode to said second or third conductive layer comprises a transparent electrode (12).
Claim 6
Dependent Claim 17 words
A photosensor according to Claim 1 or 2, wherein said substrate comprises a transparent insulating substrate (7).
Claim 7
Dependent Claim 45 words
A photosensor according to Claim 1 or 2, wherein said substrate comprises a transparent insulating substrate, a portion of said first conductive layer comprises a transparent conductive layer, and the unit picture element is arranged such that the photodiode lies above the transparent conductive layer.
Claim 8
Dependent Claim 30 words
A photosensor according to Claim 1 or 2, wherein a transparent insulating substrate is formed on said substrate on the side thereof on which the unit picture elements are arrayed.
Claim 9
Dependent Claim 19 words
A photosensor according to Claim 1, 2 or 7, wherein said substrate has an interior light shielding layer (18).

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