US4802744A
Expired / Lapsed
US
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Optical modulation apparatus
Assignee: Canon Inc
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Filing: 1987-04-10
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Granted: 1989-02-07
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Expires: 2007-04-10
Abstract
Abstract An optical modulation device includes: a first substrate having thereon a high-resistivity film having a sheet resistivity of 10 3 Ω/□ or above and a plurality of scanning electrode lines having a sheet resistivity of 10 2 Ω/□ or below and electrically connected to the high-resistivity film; a second substrate having thereon a plurality of data electrodes; and an optical modulation material disposed between the first and second substrates. At least one of the first and second substrates has thereon a pair of color filters of the same color disposed on both sides of at least one of the scanning electrode lines. The difference in height betwen the high-resistivity film and the scanning electrode lines is less than 1000 Å.
Inventors
- 👤 Hitoshi Shindo
- 👤 Masahiko Enari
- 👤 Mitsutoshi Kuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/13439
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
125 words
An optical modulation device, comprising: a first substrate having thereon a first conductor film; a second substrate having thereon a second conductor film; and an optical modulation material disposed between said first and second substrates, wherein at least one of said first and second conductor films has thereon a plurality of low-resistivity transmission electrode lines in electrical contact with said at least one of said first and second conductor films so as to provide a potential gradient along said at least one of said first and second conductor films and intersecting the low-resistivity transmission electrode lines, wherein at least one of said first and second substrates has thereon a color filter disposed on both sides of at least one of said low-resistivity transmission electrode lines.
Claim 2
Dependent Claim
125 words
An optical modulation device, comprising: a first substrate having thereon a first conductor film; a second substrate having thereon a second conductor film; and an optical modulation material disposed between said first and second substrates, wherein at least one of said first and second conductor films has thereon a plurality of low-resistivity transmission electrode lines in electrical contact with said at least one of said first and second conductor films so as to provide a potential gradient along said at least one of said first and second conductor films and intersecting the low-resistivity transmission electrode lines, wherein at least one of said first and second substrates has thereon a color filter disposed on both sides of at least one of said low-resistivity transmission electrode lines.
Claim 3
Dependent Claim
25 words
An optical modulation device according to claim 1, wherein said color filter extends symmetrically on both sizes of at least one low-resistivity transmission electrode line.
Claim 4
Dependent Claim
24 words
An optical modulation device according to claim 1, wherein color filters of plural colors are disposed between two of the low-resistivity transmission electrode lines.
Claim 5
Dependent Claim
64 words
An optical modulation device according to claim 1, further comprising another color filter, wherein said two color filters are of two different colors and each color filter has a width substantially equal to one half of the distance between an adjacent pair of low-resistivity transmission electrode lines, and wherein said two color filters are disposed between said pair of adjacent low resistivity transmission electrode.
Claim 6
Dependent Claim
52 words
An optical modulation device according to claim 1, wherein said plurality of low-resistivity transmission electrode lines are in electrical contact with said first conductor film, and wherein said second conductor film is disposed in a plurality of stripes each serving as an electrode and intersecting said plurality of low-resistivity transmission electrode lines.
Claim 7
Dependent Claim
29 words
An optical modulating device according to claim 1, wherein each of said first and second conductor films has a plurality of low-resistivity transmission electrode lines in electrical contact therewith.
Claim 8
Dependent Claim
20 words
An optical modulation device according to claim 1, wherein said color filter comprises a blue, green or red color filter.
Claim 9
Dependent Claim
18 words
An optical modulation device according to claim 1, wherein said optical modulation material is a ferroelectric liquid crystal.
Claim 10
Dependent Claim
18 words
An optical modulation device according to claim 8, wherein said ferroelectric d is a chiral smectic liquid crystal.
Claim 11
Dependent Claim
26 words
An optical modulation device according to claim 9, wherein said chiral smectic liquid crystal is disposed in a layer sufficiently thin to release its helical structure.
Claim 12
Dependent Claim
104 words
An optical modulation device, comprising: a first substrate having thereon a high-resistivity film having a sheet resistivity of at least 10 3 1/3/□ and a plurality of scanning electrode lines having a sheet resistivity of no more than 10 2 1/3/□ and disposed in electrical contact with said high-resistivity film; a second substrate having thereon a plurality of data electrodes; and an optical modulation material disposed between said first and second substrates, wherein at least one of the first and second substrates having thereon a color filter disposed so as to extend on both sides of at least one of the scanning electrode lines.
Claim 13
Dependent Claim
104 words
An optical modulation device, comprising: a first substrate having thereon a high-resistivity film having a sheet resistivity of at least 10 3 1/3/□ and a plurality of scanning electrode lines having a sheet resistivity of no more than 10 2 1/3/□ and disposed in electrical contact with said high-resistivity film; a second substrate having thereon a plurality of data electrodes; and an optical modulation material disposed between said first and second substrates, wherein at least one of the first and second substrates having thereon a color filter disposed so as to extend on both sides of at least one of the scanning electrode lines.
Claim 14
Dependent Claim
18 words
An optical modulation device according to claim 11, wherein said color filter is disposed on said first substrate.
Claim 15
Dependent Claim
19 words
An optical modulation device according to claim 11, wherein color filter comprises a blue, green or red color filter.
Claim 16
Dependent Claim
18 words
An optical modulation device according to claim 11, wherein said optical modulation material is a ferroelectric liquid crystal.
Claim 17
Dependent Claim
19 words
An optical modulation device according to claim 14, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 18
Dependent Claim
26 words
An optical modulation device according to claim 15, wherein said chiral smectic liquid crystal is disposed in a layer sufficiently thin to release its helical structure.
Claim 19
Dependent Claim
26 words
An optical modulation device according to claim 11, wherein said color filter extends symmetrically on both sides of at least one of said scanning electrode lines.
Claim 20
Dependent Claim
17 words
An optical modulation device according to claim 11, wherein said scanning electrode lines are formed of metal.
Claim 21
Dependent Claim
39 words
An optical modulation device according to claim 18, wherein said metal is composed of a material selected from the group consisting of silver, copper, gold, chromium, and alloys containing at least one of said silver, copper, gold, and chromium.
Claim 22
Dependent Claim
22 words
An optical modulation device according to claim 11, wherein said high-resistivity film comprises predominantly In 2 O 3 and ZnO 2 .
Claim 23
Dependent Claim
85 words
An optical modulation device, comprising: a first substrate having thereon a first conductor film; a second substrate having thereon a second conductor film; and an optical modulation material disposed between said first and second substrates, wherein at least one of said first and second conductor films has a low-resistivity portion having a sheet resistivity of no more than 10 2 Ω/□ and a high-resistivity portion having a sheet resistivity of at least 10 3 Ω/□ and disposed in electrical contact with said low resistivity portion.
Claim 24
Dependent Claim
85 words
An optical modulation device, comprising: a first substrate having thereon a first conductor film; a second substrate having thereon a second conductor film; and an optical modulation material disposed between said first and second substrates, wherein at least one of said first and second conductor films has a low-resistivity portion having a sheet resistivity of no more than 10 2 Ω/□ and a high-resistivity portion having a sheet resistivity of at least 10 3 Ω/□ and disposed in electrical contact with said low resistivity portion.
Claim 25
Dependent Claim
22 words
An optical modulation device according to claim 21, wherein said low-resistivity portion and said high-resistivity portion are formed alternately in stripe forms.
Claim 26
Dependent Claim
16 words
An optical modulation device according to claim 21, wherein said low-resistivity portion is formed through diffusion.
Claim 27
Dependent Claim
40 words
An optical modulation device according to claim 21, wherein said low-resistivity portion is formed in a stripe form by forming a stripe of a metal film on said conductor film and causing the metal to diffuse into said conductor film.
Claim 28
Dependent Claim
18 words
An optical modulation device according to claim 21, wherein said optical modulation material is a ferroelectric liquid crystal.
Claim 29
Dependent Claim
19 words
An optical modulation device according to claim 25, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 30
Dependent Claim
36 words
An optical modulation device according to claim 21, wherein said high-resistivity portion is formed to define a pixel, and a potential gradient is formed along said high-resistivity portion at the time of writing in the pixel.
Claim 31
Dependent Claim
27 words
An optical modulation device according to claim 21, wherein the difference in height between said high-resistivity portion and said low-resistivity portion is no more than 800 Å.
Claim 32
Dependent Claim
28 words
An optical modulation device according to claim 21, wherein the difference in height between said high resistivity portion and said low-resistivity portion is no more than 500 Å.
Claim 33
Dependent Claim
59 words
An optical modulation device, comprising: a first substance having thereon a first conductor film; a second substrate having thereon a second conductor film; and an optical modulation material disposed between said first and second substrates, at least one of said first and second conductor films being provided with a plurality of grooves in which stripe transmission electrodes are positioned.
Claim 34
Dependent Claim
59 words
An optical modulation device, comprising: a first substance having thereon a first conductor film; a second substrate having thereon a second conductor film; and an optical modulation material disposed between said first and second substrates, at least one of said first and second conductor films being provided with a plurality of grooves in which stripe transmission electrodes are positioned.
Claim 35
Dependent Claim
25 words
An optical modulation device according to claim 30, wherein the depth of the grooves and the height of the stripe transmission electrodes are the same.
Claim 36
Dependent Claim
24 words
An optical modulation device according to claim 30, wherein the depth of the grooves is smaller than the height of the stripe transmission electrodes.
Claim 37
Dependent Claim
17 words
An optical modulation device according to claim 30, wherein said optical modulation material is a liquid crystal.
Claim 38
Dependent Claim
17 words
An optical modulation device according to claim 33, wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 39
Dependent Claim
19 words
An optical modulation device according to claim 34, wherein said ferroelectric liquid crystal is a chiral smectic liquid crysta.
Claim 40
Dependent Claim
23 words
An optical modulation device according to claim 34, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal having a non-helical structure.
Claim 41
Dependent Claim
32 words
An optical modulation device according to claim 21, wherein the difference in film thickness between the said low-resistivity portion and the said high-resistivity portion is no more than 1000 Å or less.
Claim 42
Dependent Claim
32 words
An optical modulation device according to claim 1, wherein one of said low-resistivity transmission electrode lines is on said first conductor film, and wherein said color filter is on said second substrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |