US4490029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera with a framing mirror
Assignee: Minolta Co Ltd
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Filing: 1983-06-20
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Granted: 1984-12-25
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Expires: 2003-06-20
Abstract
Abstract A framing mirror provided on the front part of a camera for enabling observation of the range of the scene to be photographed from the front of the camera is used for various displays by a liquid crystal display device. Various operation modes are set by a mode selection member and the state of the display portion of the liquid crystal display device arranged in front of the framing mirror changes in accordance with the set operation mode to effect various displays. In at least one of the operation modes the whole display portion of the liquid crystal display device becomes transparent, whereby it is possible to observe the framing mirror from the front of the camera. Alternatively, the framing mirror has a transparent portion at a marginal position and the liquid crystal display device is arranged behind the transparent portion so as to be observable from the front of the camera. The liquid crystal display device displays the same data as displayed by another liquid crystal display device which is arranged behind the framing mirror, for recording data on a photographic film.
Inventors
- 👤 Harumi Tanaka
- 👤 Hiroshi Ueda
- 👤 Keisuke Maeda
- 👤 Akira Yoshizaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:05
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/02; G03B17/06; G03B17/24; G03B9/00; G03B9/64; G03B2217/00; G03B2217/24; G03B2217/242; G03B2217/243
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
175 words
A camera comprising: a picture taking lens; a window for said picture taking lens arranged at a front part of said camera; a framing mirror having a relatively large size and arranged at the front part of said camera adjacent to said window such that a person standing in front of said camera at a position within the range of the scene to be photographed can confirm the range of the scene to be photographed through observation of said framing mirror; a liquid crystal display device having a display portion and disposed in front of said framing mirror; a mode selection member operable for setting various operation modes; and circuit means coupled to said mode selection member for changing the state of the display portion of said liquid crystal display device in accordance with the operation mode set by said mode selection member, said circuit means causing the whole display portion of said liquid crystal display device to become transparent when at least one of the operation modes is set by said mode selection member.
Claim 2
Dependent Claim
175 words
A camera comprising: a picture taking lens; a window for said picture taking lens arranged at a front part of said camera; a framing mirror having a relatively large size and arranged at the front part of said camera adjacent to said window such that a person standing in front of said camera at a position within the range of the scene to be photographed can confirm the range of the scene to be photographed through observation of said framing mirror; a liquid crystal display device having a display portion and disposed in front of said framing mirror; a mode selection member operable for setting various operation modes; and circuit means coupled to said mode selection member for changing the state of the display portion of said liquid crystal display device in accordance with the operation mode set by said mode selection member, said circuit means causing the whole display portion of said liquid crystal display device to become transparent when at least one of the operation modes is set by said mode selection member.
Claim 3
Dependent Claim
39 words
A camera as defined in claim 1, wherein said mode selection member in operable to set a self-timer photography mode, in which said circuit means causes the whole display portion of said liquid crystal display device to become transparent.
Claim 4
Dependent Claim
39 words
A camera as defined in claim 1, wherein said mode selection member is operable to set a light blocking mode, in which said circuit means causes the whole display portion of said liquid crystal display device to become dark.
Claim 5
Dependent Claim
52 words
A camera as defined in claim 1, wherein said mode selection member is operable to set a self-timer photography mode, in which said circuit means causes said display portion of said liquid crystal display device to become periodically transparent at positions forming numerals or patterns representing the lapse of a self-timer operation.
Claim 6
Dependent Claim
51 words
A camera as defined in claim 4, wherein said circuit means causes the whole display portion of said liquid crystal display device to become transparent at intervals during which the display portion does not become transparent at said positions forming the numerals or patterns representing the lapse of the self-timer operation.
Claim 7
Dependent Claim
33 words
A camera as defined in claim 2, wherein said circuit means causes the display portion of said liquid crystal display device to change its state distinguishably immediately before termination of a self-timer operation.
Claim 8
Dependent Claim
68 words
A camera as defined in claim 1, wherein said circuit means includes a clock circuit for generating a signal representing a time and said mode selection member is operable for setting a clock mode, in which said circuit means causes the display portion of said liquid crystal display device to become transparent in response to said signal from said clock circuit at position forming numerals representing the time.
Claim 9
Dependent Claim
40 words
A camera as defined in claim 1, wherein said mode selection member is operable to set a framing mirror observation mode, in which said circuit means causes the whole display portion of said liquid crystal display device to become transparent.
Claim 10
Dependent Claim
250 words
A camera comprising: a picture taking lens; a window for said picture taking lens arranged at a front part of said camera; a framing mirror having a relatively large size and arranged at the front part of said camera adjacent to said window such that a person standing in front of said camera at a position within the range of the scene to be photographed can confirm the range of the scene to be photographed through observation of said framing mirror, said framing mirror having a transparent portion at a given marginal portion; a first liquid crystal display device of a light reflection type arranged behind said transparent portion of said framing mirror; a second liquid crystal display device of a light transmitting type arranged adjacent to said first liquid crystal display device behind said framing mirror; a light source for emitting a light toward said second liquid crystal display device, said light source being arranged between said framing mirror and said second liquid crystal display device; a data recording optical system for transmitting the light from said light source having passed through said second liquid crystal display device towards a given position of a focal plane of said picture taking lens through said picture taking lens, said given position of said marginal portion of said framing mirror corresponding to said given position of said focal plane of said picture taking lens; and circuit means for causing said first and second liquid crystal display device to display of common data.
Claim 11
Dependent Claim
250 words
A camera comprising: a picture taking lens; a window for said picture taking lens arranged at a front part of said camera; a framing mirror having a relatively large size and arranged at the front part of said camera adjacent to said window such that a person standing in front of said camera at a position within the range of the scene to be photographed can confirm the range of the scene to be photographed through observation of said framing mirror, said framing mirror having a transparent portion at a given marginal portion; a first liquid crystal display device of a light reflection type arranged behind said transparent portion of said framing mirror; a second liquid crystal display device of a light transmitting type arranged adjacent to said first liquid crystal display device behind said framing mirror; a light source for emitting a light toward said second liquid crystal display device, said light source being arranged between said framing mirror and said second liquid crystal display device; a data recording optical system for transmitting the light from said light source having passed through said second liquid crystal display device towards a given position of a focal plane of said picture taking lens through said picture taking lens, said given position of said marginal portion of said framing mirror corresponding to said given position of said focal plane of said picture taking lens; and circuit means for causing said first and second liquid crystal display device to display of common data.
Claim 12
Dependent Claim
47 words
A camera as defined in claim 9, further comprising a mode selection member operable to a plurality of positions including a data recording position for setting a data recording mode, said circuit means being mode operative with said mode selection member set to said data recording position.
Claim 13
Dependent Claim
72 words
A camera as defined in claim 10, wherein said data recording optical system includes a half-mirror movable between a first position located in front of said picture taking lens and a second position retracted from the front of said picture taking position, said half-mirror being interlocked with said mode selection member so as to be moved to said first position only with said mode selection member set to said data recording position.
Claim 14
Dependent Claim
62 words
In a camera: a forwardly facing framing mirror; a liquid crystal display member located in front of the mirror; and control means for selectively transferring said liquid crystal display member between an overall transparent condition affording visual access to said mirror from a position in front of said mirror and an at least partially opaque condition at least partially masking said mirror.
Claim 15
Dependent Claim
62 words
In a camera: a forwardly facing framing mirror; a liquid crystal display member located in front of the mirror; and control means for selectively transferring said liquid crystal display member between an overall transparent condition affording visual access to said mirror from a position in front of said mirror and an at least partially opaque condition at least partially masking said mirror.
Claim 16
Dependent Claim
22 words
In the camera of claim 12, wherein said control means includes a circuit for actuating said display device to display data thereon.
Claim 17
Dependent Claim
25 words
In the camera of claim 12, wherein said control means includes means for selectively rendering said liquid crystal display member overall transparent or overall opaque.
Claim 18
Dependent Claim
24 words
In the camera of claim 12, wherein the field of view of said mirror substantially coincides with the field of view of said camera.
Claim 19
Dependent Claim
12 words
In the camera of claim 12, wherein said mirror is forwardly convex.
References Cited (Backward Citations)
US4159170A
Cited
JPS5616579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |