EP0289144A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Display device
Assignee: Canon Inc
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Filing: 1988-03-30
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Granted: —
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Expires: 2008-03-30
Abstract
Abstract A display device includes scanning and signal electrodes and an optical modulation element with a memory function sandwiched between the scanning and signal electrodes. A frame unit(106) is formed around an effective display area (104) defined by the scanning and signal electrodes. Also disclosed is a display control unit including a key or the like for clearing the display screen at the time of power-on/-off operation.
Inventors
- 👤 Hiroshi Inoue
- 👤 Atsushi Mizutome
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:14
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3674; G09G3/3681; G09G3/3622; G09G3/3629; G09G3/3685; G09G3/3692; G09G3/3696; G09G2310/00; G09G2310/02; G09G2310/0232; G09G2310/0243; G09G2310/0245; G09G2310/04; G09G2310/06; G09G2310/061; G09G2310/062; G09G2310/065; G09G2320/00; G09G2320/02; G09G2320/0209; G09G2320/04; G09G2320/041; G09G2330/00; G09G2330/02; G09G2330/021
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
A display device including scanning and singal electrodes and an optical modulation element with a memory function sandwiched between said scanning and signal electrodes, wherein a frame unit is formed around an effective display area defined by said scanning and signal electrodes.
Claim 2
Dependent Claim
42 words
A display device including scanning and singal electrodes and an optical modulation element with a memory function sandwiched between said scanning and signal electrodes, wherein a frame unit is formed around an effective display area defined by said scanning and signal electrodes.
Claim 3
Dependent Claim
42 words
A device according to claim 1, wherein said frame unit is a frame unit electrically generated upon driving of second scanning electrodes arranged at both sides of said scanning electrodes and second signal electrodes arranged at both sides of said signal electrodes.
Claim 4
Dependent Claim
32 words
A device according to claim 1 or 2, wherein said frame unit is formed to have the same color as a background color when data is displayed on said effective display area.
Claim 5
Dependent Claim
22 words
A device according to claim 1, wherein said frame unit is a frame unit mechanically disposed to define said effective display area.
Claim 6
Dependent Claim
35 words
A display control unit comprising means combined with a display device constituted by a display element with a memory function for clearing a display screen of said display device at the time of power-on,,-off operation.
Claim 7
Dependent Claim
35 words
A display control unit comprising means combined with a display device constituted by a display element with a memory function for clearing a display screen of said display device at the time of power-on,,-off operation.
Claim 8
Dependent Claim
46 words
A display control unit comprising means contained with a display device including scanning and signal electrodes and a display element sandwiched between said scanning and signal electrodes for changing and setting at least one of data defining drive waveforms for driving said scanning and signal electrodes.
Claim 9
Dependent Claim
46 words
A display control unit comprising means contained with a display device including scanning and signal electrodes and a display element sandwiched between said scanning and signal electrodes for changing and setting at least one of data defining drive waveforms for driving said scanning and signal electrodes.
Claim 10
Dependent Claim
24 words
A unit according to claim 6, wherein said setting means changes and sets the data in accordance with drive conditions of said display device.
Claim 11
Dependent Claim
25 words
A unit according to claim 6 or 7, wherein said display element comprises an optical modulation element having a bistable function for an electric field.
Claim 12
Dependent Claim
39 words
A unit according to any one of claims 6 to 8, wherein said optical modulation element comprises a ferroelectric liquid crystal element and said display device is arranged such that said ferroelectric liquid crystal element has the memory function.
References Cited (Backward Citations)
No citation records indexed.
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