US5053889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge latent image detecting device
Assignee: Victor Company of Japan Ltd
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Filing: 1990-05-30
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Granted: 1991-10-01
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Expires: 2010-05-30
Abstract
Abstract A device for detecting a charge latent image on a recording medium includes a photo-modulation member having a composite film of high polymer material and a liquid crystal material dispersed in the high polymer material, preferable liquid crystal material having refraction anisotropy higher than 0.18 and droplet size of less than 0.5 micron.
Inventors
- 👤 Atsushi Nakano
- 👤 Toshio Konno
- 👤 Tadayuki Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:26
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/135
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A device for detecting a charge latent image on a recording medium, comprising: a photo-modulation member having an electrooptic effect, the photo-modulation member opposing the recording medium and being exposed to an electric field generated by the charge latent image; means for applying a polarized light to the photo-modulation member, wherein the polarized light enters the photo-modulation member, and passes through the photo-modulation member and then exits from the photo-modulation member; means for detecting a polarization of the light which exits from the photo-modulation member; wherein the electrooptic effect of the photo-modulation member modulates a polarization of the light in accordance with the electric field applied to the photo-modulation member while the light passes through the photo-modulation member; wherein the photo-modulation member is composed of a composite film which comprises a high polymer material and a liquid crystal material dispersed in the high polymer material.
Claim 2
Independent Claim
145 words
A device for detecting a charge latent image on a recording medium, comprising: a photo-modulation member having an electrooptic effect, the photo-modulation member opposing the recording medium and being exposed to an electric field generated by the charge latent image; means for applying a polarized light to the photo-modulation member, wherein the polarized light enters the photo-modulation member, and passes through the photo-modulation member and then exits from the photo-modulation member; means for detecting a polarization of the light which exits from the photo-modulation member; wherein the electrooptic effect of the photo-modulation member modulates a polarization of the light in accordance with the electric field applied to the photo-modulation member while the light passes through the photo-modulation member; wherein the photo-modulation member is composed of a composite film which comprises a high polymer material and a liquid crystal material dispersed in the high polymer material.
Claim 3
Dependent Claim
41 words
The device of claim 1 wherein the high polymer material comprises a resin which is selected from the group consisting of methacrylic resin, polyester resin, polycarbonate resin, vinyl chloride resin, polyamide resin, polyethylene resin, polypropylene resin, polystyrene resin, and silicone resin.
Claim 4
Dependent Claim
14 words
The device of claim 1 wherein the liquid crystal material comprises nematic liquid crystal.
Claim 5
Independent Claim
142 words
A device for detecting a charge latent image on a recording medium, comprising: a photo-modulation member having an electrooptic effect, the photo-modulation member opposing the recording medium and being exposed to an electric field generated by the charge latent image; means for applying light to the photo-modulation member, wherein the light enters the photo-modulation member, and passes through the photo-modulation member and then exits from the photo-modulation member; means for detecting a polarization of the light which exits from the photo-modulation member; wherein the electrooptic effect of the photo-modulation member modulates a polarization of the light in accordance with the electric field applied to the photo-modulation member while the light passes through the photo-modulation member; wherein the photo-modulation member is composed of a composite film which comprises a high polymer material and a liquid crystal material dispersed in the high polymer material.
Claim 6
Independent Claim
142 words
A device for detecting a charge latent image on a recording medium, comprising: a photo-modulation member having an electrooptic effect, the photo-modulation member opposing the recording medium and being exposed to an electric field generated by the charge latent image; means for applying light to the photo-modulation member, wherein the light enters the photo-modulation member, and passes through the photo-modulation member and then exits from the photo-modulation member; means for detecting a polarization of the light which exits from the photo-modulation member; wherein the electrooptic effect of the photo-modulation member modulates a polarization of the light in accordance with the electric field applied to the photo-modulation member while the light passes through the photo-modulation member; wherein the photo-modulation member is composed of a composite film which comprises a high polymer material and a liquid crystal material dispersed in the high polymer material.
Claim 7
Dependent Claim
50 words
The device of claim 4 wherein the high polymer material comprises a resin which is selected from the group consisting of a methacrylic resin, a polyester resin, a polycarbonate resin, a vinyl chloride resin, a polyamide resin, a polyethylene resin, a polypropylene resin, a polystyrene resin and a silicone resin.
Claim 8
Dependent Claim
14 words
The device of claim 4 wherein the liquid crystal material comprises nematic liquid crystal.
References Cited (Backward Citations)
US4850683A
Cited
US4888126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |