US4751546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device for cameras
Assignee: Fujifilm Holdings Corp
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Filing: 1986-09-30
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Granted: 1988-06-14
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Expires: 2006-09-30
Abstract
Abstract A display device for a camera has a display panel with a digital display unit having seven display segments disposed in a figure-eight shape. The digital display unit displays the number of exposed frames or other exposure information, and in addition, a portion of display segments is utilized for display or for indicating an alarm condition of the camera. In order to clearly recognize the display or alarm of the camera conditions, a character or symbol representative of the display content or alarm content is disposed near a display segment used for both numerical display, and camera condition display or alarm. A display of the film winding state is performed by flashing the laterally elongated display segments positioned between patterns formed sideways of the digital display unit and symbolizing a film supply section and a film winding section.
Inventors
- 👤 Katuhiko Yamamoto
- 👤 Takeshi Yoshino
- 👤 Michihiro Shiina
- 👤 Shigenori Goto
- 👤 Masayoshi Hirai
- 👤 Shiro Hashimoto
- 👤 Hisashi Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
A display device for a camera, comprising first and second rollers disposed on opposite sides of an exposure aperture of the camera and rotating in cooperative association with a film which is being wound, the surface of said first roller having a high reflectivity and that of said second roller having a low reflectivity; a first photosensor for applying light to the surface of said first roller and detecting light reflected therefrom; a second photosensor for applying light to the surface of said second roller and detecting light reflected therefrom; means for detecting whether a film is loaded, based on a comparison of output signal levels obtained from said first and second photosensors; and indicia means responsive to said detecting means for indicating whether a film is loaded.
Claim 2
Dependent Claim
128 words
A display device for a camera, comprising first and second rollers disposed on opposite sides of an exposure aperture of the camera and rotating in cooperative association with a film which is being wound, the surface of said first roller having a high reflectivity and that of said second roller having a low reflectivity; a first photosensor for applying light to the surface of said first roller and detecting light reflected therefrom; a second photosensor for applying light to the surface of said second roller and detecting light reflected therefrom; means for detecting whether a film is loaded, based on a comparison of output signal levels obtained from said first and second photosensors; and indicia means responsive to said detecting means for indicating whether a film is loaded.
Claim 3
Dependent Claim
22 words
A display device for a camera according to claim 1, in which said indicia means flashes if a film is not loaded.
Claim 4
Dependent Claim
112 words
A display device for a camera having a liquid crystal display panel with a plurality of digital display units displaying numerical data of plural digits, the digital display unit having seven display segments disposed in a figure-eight shape; patterns on the display panel symbolizing a film supply section and a film winding section respectively disposed beside a digital display unit for the highest digit and beside a digital display unit for the lowest digit; means for generating a signal while a film is winding; and means for flashing only a plurality of aligned laterally elongated said display segments one from each said digital display unit in response to said film winding signal.
Claim 5
Dependent Claim
112 words
A display device for a camera having a liquid crystal display panel with a plurality of digital display units displaying numerical data of plural digits, the digital display unit having seven display segments disposed in a figure-eight shape; patterns on the display panel symbolizing a film supply section and a film winding section respectively disposed beside a digital display unit for the highest digit and beside a digital display unit for the lowest digit; means for generating a signal while a film is winding; and means for flashing only a plurality of aligned laterally elongated said display segments one from each said digital display unit in response to said film winding signal.
Claim 6
Dependent Claim
27 words
A display device for a camera according to claim 3, wherein said flashing display segments comprise only the uppermost display segment of each said digital display unit.
Claim 7
Dependent Claim
32 words
A display device for a camera according to claim 3, and means for flashing said patterns symbolizing the film supply section and the film winding section when a film is not loaded.
Claim 8
Dependent Claim
124 words
In a display device for a camera having a liquid crystal display panel with a plurality of digital display units displaying numerical data of plural digits, the digital display unit having seven display segments disposed in a figure-eight shape; the improvement comprising a symbol on the display panel disposed adjacent each of said digital display units for displaying a display content or alarm content; a plurality of means, corresponding in number with the types of said display or alarm content, for detecting undesirable conditions of a camera and for generating corresponding signals; and means for flashing at least one of said display segments of said digital display unit adjacent said symbol, in response to a signal from a corresponding one of said detecting means.
Claim 9
Dependent Claim
124 words
In a display device for a camera having a liquid crystal display panel with a plurality of digital display units displaying numerical data of plural digits, the digital display unit having seven display segments disposed in a figure-eight shape; the improvement comprising a symbol on the display panel disposed adjacent each of said digital display units for displaying a display content or alarm content; a plurality of means, corresponding in number with the types of said display or alarm content, for detecting undesirable conditions of a camera and for generating corresponding signals; and means for flashing at least one of said display segments of said digital display unit adjacent said symbol, in response to a signal from a corresponding one of said detecting means.
Claim 10
Dependent Claim
24 words
A display device for a camera according to claim 6, wherein said flashing display segment is a laterally elongated one nearest to said symbol.
Claim 11
Dependent Claim
24 words
A display device for a camera according to claim 5, wherein said symbol is printed on a member surrounding said liquid crystal display panel.
Claim 12
Dependent Claim
24 words
A display device for a camera according to claim 6, wherein said detecting means detects that a date print lamp was not turned on.
Claim 13
Dependent Claim
22 words
A display device for a camera according to claim 6, wherein said detecting means detects that a flash lamp was not flashed.
Claim 14
Dependent Claim
24 words
A display device for a camera according to claim 6, wherein said detecting means detects that a battery voltage fell below a predetermined value.
Claim 15
Dependent Claim
119 words
A detection device for detecting whether film is loaded in a camera, comprising first and second rollers disposed on opposite sides of an exposure aperture of a camera and rotating in cooperative association with a film which is being wound, the surface of said first roller having a high reflectivity and that of said second roller having a low reflectivity; a first photosensor for applying light to the surface of said first roller and detecting light reflected therefrom; a second photosensor for applying light to the surface of said second roller and detecting light reflected therefrom; and means for detecting whether film is loaded, based on a comparison of output signal levels obtained from said first and second photosensors.
Claim 16
Dependent Claim
119 words
A detection device for detecting whether film is loaded in a camera, comprising first and second rollers disposed on opposite sides of an exposure aperture of a camera and rotating in cooperative association with a film which is being wound, the surface of said first roller having a high reflectivity and that of said second roller having a low reflectivity; a first photosensor for applying light to the surface of said first roller and detecting light reflected therefrom; a second photosensor for applying light to the surface of said second roller and detecting light reflected therefrom; and means for detecting whether film is loaded, based on a comparison of output signal levels obtained from said first and second photosensors.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |