Patent US4959663A successfully refreshed from Google Patents.
US4959663A
Expired / Lapsed
US
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Image recording device
Assignee: Mitsubishi Electric Corp
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Filing: 1989-02-28
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Granted: 1990-09-25
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Expires: 2009-02-28
Abstract
Abstract An image printing device in which desired images represented by two or more valued data are recorded with a laser beam. This image printing device allows to employ a semiconductor laser which is relatively low in an output power resulting in reducing manufacturing cost and prolonging a service life of the device.
Inventors
- 👤 Kazuhiro Chiba
- 👤 Noriko Bamba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:09
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/129; G06K15/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
An image printing device using a laser beam, comprising: a head including a support transmitting a laser beam, a film resistor which reacts upon temperature or light quantity and electrodes for applying voltage to said film resistor; and means for generating a laser beam for controlling the generation of heat by said film resistor, in which the optical intensity of said laser beam is modulated according to an image signal, said laser beam thus modulated is converged so as to have a predetermined beam diameter and deflected in a scanning mode at a predetermined speed, said laser beam thus converged is applied spot-wise to said film resistor, to reduce the resistance thereof, and said resistance thus reduced cooperating with a voltage applied to said film resistor generates heat spot-wise in said film resistor, for monochromatic image printing operation or a color image printing operation.
Claim 2
Dependent Claim
144 words
An image printing device using a laser beam, comprising: a head including a support transmitting a laser beam, a film resistor which reacts upon temperature or light quantity and electrodes for applying voltage to said film resistor; and means for generating a laser beam for controlling the generation of heat by said film resistor, in which the optical intensity of said laser beam is modulated according to an image signal, said laser beam thus modulated is converged so as to have a predetermined beam diameter and deflected in a scanning mode at a predetermined speed, said laser beam thus converged is applied spot-wise to said film resistor, to reduce the resistance thereof, and said resistance thus reduced cooperating with a voltage applied to said film resistor generates heat spot-wise in said film resistor, for monochromatic image printing operation or a color image printing operation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |