EP0361879A2
Expired / Lapsed
EP
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System for recording/reproducing charge latent image
Assignee: Victor Company of Japan Ltd
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Filing: 1989-09-26
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Granted: —
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Expires: 2009-09-26
Abstract
Abstract There is disclosed a recording/reproducing system comprising an optical system for directing along a path of an electromagnetic radio ray from an object toward a recording medium, and a recording head disposed in the path for generating a charge latent image onto the medium. The feature of the system resides in that the recording head (system) forms the detection region which is not entirely subject to the influence of the electromagnetic radio ray and which is provided in a portion of the charge recording region of the medium, and in that a reproducing system discriminates the polarity of charges or the recording mode of the charge latent image recorded onto the medium by detecting the charges in the detection region.
Inventors
- 👤 Itsuo Takanashi
- 👤 Shintaro Nakagaki
- 👤 Hirohiko C-428 Ookurayama Daini Shinonaga
- 👤 Masato Furuya
- 👤 Tsutou Asakura
- 👤 Hiromichi Tai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:52
CPC Classifications
G; G11; G11B; G11B9/00; G11B11/00; G11B7/00; G11B7/004
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A recording/reproducing system for recording and/or reproducing a charge latent image onto/from a recording medium, comprising an optical system for directing along a path of an electromagnetic radio ray from an object toward said medium, and recording means disposed in the path for generating said charge latent image onto said medium in response to the electromagnetic radio ray from the object, said recording means comprising charge detection means for causing an uniform charge in a detection region of the recording medium, said uniform charge corresponding to a reference intensity of the object.
Claim 2
Dependent Claim
92 words
A recording/reproducing system for recording and/or reproducing a charge latent image onto/from a recording medium, comprising an optical system for directing along a path of an electromagnetic radio ray from an object toward said medium, and recording means disposed in the path for generating said charge latent image onto said medium in response to the electromagnetic radio ray from the object, said recording means comprising charge detection means for causing an uniform charge in a detection region of the recording medium, said uniform charge corresponding to a reference intensity of the object.
Claim 3
Dependent Claim
34 words
A recording/reproducing system as set forth in claim 1, in which said detection region is provided to a specific position of the recording medium, which corresponds to a position of said charge detection means.
Claim 4
Dependent Claim
100 words
A recording/reproducing system as set forth in claim 1, in which said recording means comprise two electrodes connected so that a predetermined voltage is applied thereto, a photoconductive layer member disposed between said electrodes and adapted so that an electromagnetic radio ray image is formed thereon, a charge hold layer member disposed between said electrodes to hold charges in correspondence with said electromagnetic radio ray image to thereby record said charge latent image thereon, and readout means for reading charges recorded on said hold layer in order to obtain a reproduced image to thereby read out said charge latent image.
Claim 5
Dependent Claim
86 words
A recording/reproducing system as set forth in claim 3, said system further comprising said detection region formed by said charge detection means in a portion of a charge recording region of said hold layer and adapted so that charges which are not entirely subject to the influence by said electromagnetic radio ray are recorded thereinto; and discrimination means for discriminating between recording modes of said charge latent image recorded on said hold layer on the basis of information related to charges obtained from said detection region.
Claim 6
Dependent Claim
41 words
A recording/reproducing system as set forth in claim 4, wherein said recording mode discriminated by said discrimination means includes polarities of charges held by said hold layer, and wherein said discrimination means determine whether charges held are positive or negative charges.
Claim 7
Dependent Claim
93 words
A charge latent image recording/reproducing system as set forth in claim 4, wherein said discrimination means discriminates said recording mode of a latent image recorded on said hold layer, i.e., the relationship between an amount of charges in a portion corresponding to said object and an amount of charges in a portion except for said object, thus to determine whether said amount of charges of said object corresponding portion is larger (positive latent image) than said amount of charges of said portion except for said object or smaller (negative latent image) than that.
Claim 8
Dependent Claim
100 words
A charge latent image recording/reproducing system as set forth in claim 4, wherein said electromagnetic radio ray image formed onto said photoconductive layer is an optical image of said object as an image pickup object, and wherein charges having a level corresponding to the black portions in said optical image are recorded into said detection region to allow said readout means to read the charge level in said detection region to thereby set a video signal for a reproduced image from said charge latent image so that said detection region has a block corresponding level, thus to reproduce said image.
Claim 9
Dependent Claim
56 words
A charge latent image recording/reproducing system as set forth in claim 7, wherein the reproducing system reads out, from a detection region of said hold layer, information corresponding to the optical black within a blanking interval of said video signal, thus to set the black level of said video signal on the basis of said information.
Claim 10
Dependent Claim
117 words
A charge latent image recording/reproducing system as set forth in claim 4, wherein the recording system includes latent image formation means for transforming said electromagnetic radio ray information inputted by said photoconductive layer member to a charge latent image corresponding to said information to record said charge latent image onto said hold layer, and wherein the reproducing system includes signal generation means for reading out charges of said latent image from said hold layer to generate a video signal corresponding to said charges, thus to set a level of said video signal generated by said signal generation means by using, as a reference, a level of a signal which has been read out from said detection region.
Claim 11
Dependent Claim
48 words
A charge latent image recording/reproducing system as set forth in claim 9, wherein said reproducing system is constructed to control a relative position between said readout means and said hold layer member to thereby set a level of said video signal with respect to said reference signal level.
Claim 12
Dependent Claim
144 words
A recording/reproducing system as set forth in claim 1, having an information processing system constructed to input electromagnetic radio ray information to a photo-to-photo transducer comprising at least a photoconductive layer member and a photomodulation layer member arranged in a stacked manner between two electrodes to which a predetermined voltage is applied to read out, from said photo-to-photo transducer, transformed electromagnetic radio ray corresponding to said electromagnetic radio ray, thus to generate a signal, wherein said reference region is set at least one side of said region to which electromagnetic radio ray information of said photo-to-photo transducer is caused to be inputted, thus to set a level of said signal generated by reading out said transformed electromagnetic radio ray corresponding to said electromagnetic radio ray on the basis of a level of said transformed electromagnetic radio ray obtained by readout from said reference region.
Claim 13
Dependent Claim
40 words
An information processing system as set forth in claim 11, wherein said transformed electromagnetic radio ray for obtaining the level of said reference signal or a level of information is read out within a blanking interval in the video signal.
References Cited (Backward Citations)
No citation records indexed.
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