Patent US4935819A successfully refreshed from Google Patents.
US4935819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture-width-adaptable television receiver
Assignee: Zenith Electronics LLC
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Filing: 1988-12-22
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Granted: 1990-06-19
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Expires: 2008-12-22
Abstract
Abstract A television receiver is disclosed which is capable of presenting a wide-screen picture format, and alternatively, a narrowed, partial-screen picture format having non-luminous side panels and visible vertical edges. The receiver includes a detector for detecting the transmission in a predetermined tuned television channel of the partial-screen picture format, and shutters movable in response to the detection of the transmission to conceal the non-luminous side panels of the screen and the visible vertical edges.
Inventors
- 👤 John J. Pederson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:17
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/0122
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A television receiver comprises a picture screen capable of presenting a wide-screen picture format, and alternatively, a narrowed, partial-screen picture format having non-luminous side panels and visible vertical edges, said receiver including shutter means for concealing said non-luminous side panels, said receiver including photocell means for sensing light emitted from said side panels during reception of said wide-screen picture format, and means responsive to said photocell means for opening said shutter means to expose said side panels during reception of a wide-screen picture format.
Claim 2
Dependent Claim
84 words
A television receiver comprises a picture screen capable of presenting a wide-screen picture format, and alternatively, a narrowed, partial-screen picture format having non-luminous side panels and visible vertical edges, said receiver including shutter means for concealing said non-luminous side panels, said receiver including photocell means for sensing light emitted from said side panels during reception of said wide-screen picture format, and means responsive to said photocell means for opening said shutter means to expose said side panels during reception of a wide-screen picture format.
Claim 3
Dependent Claim
25 words
The television receiver according to claim 1 wherein said shutter means are normally positioned to conceal said side panels when said television receiver is off.
Claim 4
Dependent Claim
89 words
A television receiver comprises a picture screen capable of presenting a wide-screen picture format, and alternatively, a narrowed, partial-screen picture format having non-luminous side panels and visible vertical edges, said receiver including shutter means normally positioned when said receiver is off to conceal said non-luminous side panels, said receiver including photocell means for sensing light emitted from said side panels when said receiver is on, and means responsive to said photocell means for opening said shutter means to expose said side panels during reception of a wide-screen picture format.
Claim 5
Dependent Claim
89 words
A television receiver comprises a picture screen capable of presenting a wide-screen picture format, and alternatively, a narrowed, partial-screen picture format having non-luminous side panels and visible vertical edges, said receiver including shutter means normally positioned when said receiver is off to conceal said non-luminous side panels, said receiver including photocell means for sensing light emitted from said side panels when said receiver is on, and means responsive to said photocell means for opening said shutter means to expose said side panels during reception of a wide-screen picture format.
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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |