US4711547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: Canon Inc
•
Filing: 1985-11-27
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Granted: 1987-12-08
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Expires: 2005-11-27
Abstract
Abstract A display device includes a non-luminescent type display element (an electro-chromic display element) which changes concentration with a voltage applied thereto, and a self-luminescent type display element (an electro-luminescent display element) which emits light according as a voltage is applied thereto. The two display elements are laminated together and formed, one as a color forming layer and the other as a luminescent layer, into a desired shape for visual observation. The laminated display elements are arranged in a visually observable display part of the display device.
Inventors
- 👤 Kiyoshi Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:34
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/157; G03; G03B; G03B17/00; G03B17/18; G03B17/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A display device for photographing information of a camera, comprising: first display means which has an optical density thereof varied as a voltage is applied thereto for forming photographing information; second display means which emits light as a voltage is applied thereto thus forming information with a same content as that of the photographing information formed by said first display means; and supply means for selectively supplying the voltage to said first display means and said second display means depending on brightness of an object to be photographed.
Claim 2
Dependent Claim
88 words
A display device for photographing information of a camera, comprising: first display means which has an optical density thereof varied as a voltage is applied thereto for forming photographing information; second display means which emits light as a voltage is applied thereto thus forming information with a same content as that of the photographing information formed by said first display means; and supply means for selectively supplying the voltage to said first display means and said second display means depending on brightness of an object to be photographed.
Claim 3
Dependent Claim
21 words
A device according to claim 1, wherein said photographing information is an information indicating a focusing direction of a photo-taking lens.
Claim 4
Dependent Claim
39 words
A device according to claim 1, wherein said supply means supplied the voltage to said first display means when the object brightness is high, and supplies the voltage to said second display means when the object brightness is low.
Claim 5
Dependent Claim
123 words
A display device for a camera, comprising: an electro-chromic display element including a color forming layer formed into the shape of data relative to photographing information; an electro-luminescent display element including a luminescent layer formed into the shape of the data relative to photographing information; a display part having said electro-chromic display element and said electro-luminescent display element arranged there in a laminated state, said display part being arranged to make a visually observable display by virtue of said color forming layer and/or said luminescent layer; first operating means for operating said electro-chromic display element; second operating means for operating said electro-luminescent display element; and selecting means for selecting the operation of said first operating means or that of said second operating means.
Claim 6
Dependent Claim
123 words
A display device for a camera, comprising: an electro-chromic display element including a color forming layer formed into the shape of data relative to photographing information; an electro-luminescent display element including a luminescent layer formed into the shape of the data relative to photographing information; a display part having said electro-chromic display element and said electro-luminescent display element arranged there in a laminated state, said display part being arranged to make a visually observable display by virtue of said color forming layer and/or said luminescent layer; first operating means for operating said electro-chromic display element; second operating means for operating said electro-luminescent display element; and selecting means for selecting the operation of said first operating means or that of said second operating means.
Claim 7
Dependent Claim
22 words
A device according to claim 4, wherein the width of said color forming layer is wider than that of said luminescent layer.
Claim 8
Dependent Claim
28 words
A device according to claim 4, wherein said color forming layer and said luminescent layer are formed in a shape indicating a focusing direction of a phototaking lens.
Claim 9
Dependent Claim
34 words
A device according to claim 4, wherein said selecting means operates said first operating means when an object to be photographed is bright and operates said second operating means when the object is dark.
Claim 10
Dependent Claim
23 words
A device according to claim 4, wherein a shape of said electro-chromic display element is same as that of said electro-luminescent display element.
References Cited (Backward Citations)
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |