US4747671A
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Ferroelectric optical modulation device and driving method therefor wherein electrode has delaying function
Assignee: Canon Inc
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Filing: 1986-11-17
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Granted: 1988-05-31
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Expires: 2006-11-17
Abstract
Abstract An optical modulation device is disclosed, which includes: a first substrate having thereon a signal transmission electrode connected to a signal source and a first electrode having a delay function connected to the transmission electrode; a second substrate having thereon a second electrode disposed opposite to said first electrode; and an optical modulation material, particularly a ferroelectric liquid crystal, disposed between the first and second electrodes. An optical modulation system, particularly a gradational display system, utilizing the delay function is also disclosed.
Inventors
- 👤 Tohru Takahashi
- 👤 Hiroshi Inoue
- 👤 Yoshiyuki Osada
- 👤 Yutaka Inaba
- 👤 Junichiro Kanbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/3637; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G3/2007; G09G3/2011; G09G3/2014; G09G3/207; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
58 words
An optical modulation device, comprising: a first substrate having thereon a signal transmission electrode connected to a signal source and a first electrode having a delay function connected to the transmission electrode, a second substrate having thereon a second electrode disposed opposite to said first electrode, and an optical modulation material disposed between the first and second electrodes.
Claim 2
Dependent Claim
58 words
An optical modulation device, comprising: a first substrate having thereon a signal transmission electrode connected to a signal source and a first electrode having a delay function connected to the transmission electrode, a second substrate having thereon a second electrode disposed opposite to said first electrode, and an optical modulation material disposed between the first and second electrodes.
Claim 3
Dependent Claim
50 words
An optical modulation device according to claim 1, wherein said first electrode and said second electrode are respectively disposed in a plurality, and the resultant plurality of first electrodes and the plurality of second electrodes are disposed to intersect with each other so that each intersection region defines a pixel.
Claim 4
Dependent Claim
76 words
An optical modulation device according to claim 2, wherein the transmission electrode has a resistance r 1 as viewed from the signal source, the first electrode connected to the transmission electrode provides a capacitance C t , a portion of the first electrode constituting one pixel has a resistance r 2 as viewed from the transmission electrode, and one pixel provides a capacitance Ce; the thus defined values satisfying the relationship of: r.sub.1 C.sub.t <r.sub.2 C.sub.e
Claim 5
Dependent Claim
22 words
An optical modulation device according to claim 1, wherein the transmission electrode has a sheet resistivity of 10 2 Ω/□ or lower.
Claim 6
Dependent Claim
22 words
An optical modulation device according to claim 1, wherein said first electrode has a sheet resistivity of 10 2 -10 9 Ω/□.
Claim 7
Dependent Claim
24 words
An optical modulation device according to claim 1, wherein said first electrode is formed of a film of a metalloid or a metal oxide.
Claim 8
Dependent Claim
18 words
An optical modulation device according to claim 1, wherein said optical modulation material is a ferroelectric liquid crystal.
Claim 9
Dependent Claim
19 words
An optical modulation device according to claim 7, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 10
Dependent Claim
23 words
An optical modulation device according to claim 8, wherein said chiral smectic liquid crystal is a chiral smectic C or H liquid crystal.
Claim 11
Dependent Claim
32 words
An optical modulation device according to claim 8, wherein said chiral smectic liquid crystal is formed in a layer thin enough to release the helical structure of said chiral smectic liquid crystal.
Claim 12
Dependent Claim
18 words
An optical modulation device according to claim 1, wherein said information signal source is an information signal source.
Claim 13
Dependent Claim
33 words
An optical modulation device according to claim 11, wherein said information signal source comprises means for supplying an information signal having a pulse duration corresponding to given gradation data to said transmission electrode.
Claim 14
Dependent Claim
32 words
An optical modulation device according to claim 11, wherein said information signal source comprises means for supplying an information signal having a waveheight corresponding to given gradation data to said transmission electrode.
Claim 15
Dependent Claim
34 words
An optical modulation device according to claim 11, wherein said information signal source comprises means for supplying an information signal having a number of pulses corresponding to given gradation data to said transmission electrode.
Claim 16
Dependent Claim
17 words
An optical modulation device according to claim 1, wherein said signal source is a scanning signal source.
Claim 17
Dependent Claim
84 words
An optical modulation device, comprising: a first substrate having thereon a first signal transmission electrode connected to an information signal source and a first electrode having a delay function connected to the transmission electrode, a second substrate having thereon a second signal transmission electrode connected to a scanning signal source, and a second electrode having a delay function disposed opposite to said first electrode and connected to the second signal transmission electrode, and an optical modulation material disposed between the first and second electrodes.
Claim 18
Dependent Claim
84 words
An optical modulation device, comprising: a first substrate having thereon a first signal transmission electrode connected to an information signal source and a first electrode having a delay function connected to the transmission electrode, a second substrate having thereon a second signal transmission electrode connected to a scanning signal source, and a second electrode having a delay function disposed opposite to said first electrode and connected to the second signal transmission electrode, and an optical modulation material disposed between the first and second electrodes.
Claim 19
Dependent Claim
26 words
An optical modulation device according to claim 16, wherein the first and second signal transmission electrodes have a sheet resistivity of 10 2 Ω/□ or lower.
Claim 20
Dependent Claim
22 words
An optical modulation device according to claim 16, wherein said first electrode has a sheet resistivity of 10 2 -10 9 Ω/□.
Claim 21
Dependent Claim
26 words
An optical modulation device according to claim 16, wherein said first and second electrodes are formed of a film of a metalloid or a metal oxide.
Claim 22
Dependent Claim
18 words
An optical modulation device according to claim 16, wherein said optical modulation material is a ferroelectric liquid crystal.
Claim 23
Dependent Claim
19 words
An optical modulation device according to claim 20, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 24
Dependent Claim
23 words
An optical modulation device according to claim 21, wherein said chiral smectic liquid crystal is a chiral smectic C or H liquid crystal.
Claim 25
Dependent Claim
32 words
An optical modulation device according to claim 21, wherein said chiral smectic liquid crystal is formed in a layer thin enough to release the helical structure of said chiral smectic liquid crystal.
Claim 26
Dependent Claim
33 words
An optical modulation device according to claim 16, wherein said information signal source comprises means for supplying an information signal having a pulse duration corresponding to given gradation data to said transmission electrode.
Claim 27
Dependent Claim
32 words
An optical modulation device according to claim 16, wherein said information signal source comprises means for supplying an information signal having a waveheight corresponding to given gradation data to said transmission electrode.
Claim 28
Dependent Claim
34 words
An optical modulation device according to claim 16, wherein said information signal source comprises means for supplying an information signal having a number of pulses corresponding to given gradation data to said transmission electrode.
Claim 29
Dependent Claim
78 words
A driving method for an optical modulation device of the type comprising: a first substrate having thereon a signal transmission electrode connected to a signal source and a first electrode having a delay function connected to the transmission electrode, a second substrate having thereon a second electrode disposed opposite to said first electrode, and an optical modulation material disposed between the first and second electrodes; said driving method comprising applying an information signal to the signal transmission electrode.
Claim 30
Dependent Claim
78 words
A driving method for an optical modulation device of the type comprising: a first substrate having thereon a signal transmission electrode connected to a signal source and a first electrode having a delay function connected to the transmission electrode, a second substrate having thereon a second electrode disposed opposite to said first electrode, and an optical modulation material disposed between the first and second electrodes; said driving method comprising applying an information signal to the signal transmission electrode.
Claim 31
Dependent Claim
21 words
A driving method according to claim 27, wherein said information signal is a gradation signal comprising a voltage magnitude-modulation pulse signal.
Claim 32
Dependent Claim
20 words
A driving method according to claim 27, wherein said information signal is a gradation signal comprising a pulse duration-modulation signal.
Claim 33
Dependent Claim
20 words
A driving method according to claim 27, wherein said information signal is a gradation signal comprising a pulse number-modulation signal.
Claim 34
Dependent Claim
49 words
A driving method according to claim 27, wherein said first electrode and said second electrode are respectively disposed in a plurality, and the resultant plurality of first electrodes and the plurality of second electrodes are disposed to intersect with each other so that each intersection region defines a pixel.
Claim 35
Dependent Claim
38 words
A driving method according to claim 31, wherein an information signal is selectively applied to the plurality of first electrodes, and a scanning signal is applied to the plurality of second electrodes line-by-line, thereby to provide a display.
Claim 36
Dependent Claim
38 words
A driving method according to claim 31, wherein a scanning signal is applied to the plurality of first electrodes line-by-line, and an information signal is selectively applied to the plurality of second electrodes, thereby to provide a display.
Claim 37
Dependent Claim
17 words
A driving method according to claim 27, wherein said optical modulation material is a ferroelectric liquid crystal.
Claim 38
Dependent Claim
36 words
A driving method according to claim 27, wherein said second electrode comprises a combination of a signal transmission electrode connected to a signal source and an electrode having a delay function connected to the transmission electrode.
Claim 39
Dependent Claim
21 words
A driving method according to claim 27, wherein the transmission electrode has a sheet resistivity of 10 2 Ω/□ or lower.
Claim 40
Dependent Claim
21 words
A driving method according to claim 27, wherein said first electrode has a sheet resistivity of 10 2 -10 9 Ω/□.
Claim 41
Dependent Claim
23 words
A driving method according to claim 37, wherein said first electrode is formed of a film of a metalloid or a metal oxide.
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