US5644373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device with substrates of different materials and similar thermal expansion coefficients
Assignee: Canon Inc
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Filing: 1994-09-26
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Granted: 1997-07-01
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Expires: 2014-09-26
Abstract
Abstract A liquid crystal device having a pair of substrates opposed to each other at a predetermined distance from each other, and a liquid crystal enclosed between the pair of substrates. The pair of substrates are formed of different materials, and the difference between the thermal expansion coefficients of the substrates is set within the range of ±50% of the thermal expansion coefficient of one of the two substrates. Misalignment between the substrates is thereby prevented.
Inventors
- 👤 Teruhiko Furushima
- 👤 Shigetoshi Sugawa
- 👤 Moriyuki Okamura
- 👤 Masaru Kamio
- 👤 Mamoru Miyawaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:26
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13454
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A liquid crystal device comprising: first and second substrates opposed to each other at a predetermined distance, said substrates being formed of different materials, said first substrate including light-transmissive and non-light-transmissive layers; and a liquid crystal enclosed between said first and second substrates, wherein a difference between a thermal expansion coefficient of said non-light-transmissive layer and a thermal expansion coefficient of said second substrate is within a range of ±50% of a thermal expansion coefficient of said first substrate over a temperature range for sealing said first and second substrates together without intentional deformation of either said first substrate or said second substrate.
Claim 2
Dependent Claim
103 words
A liquid crystal device comprising: first and second substrates opposed to each other at a predetermined distance, said substrates being formed of different materials, said first substrate including light-transmissive and non-light-transmissive layers; and a liquid crystal enclosed between said first and second substrates, wherein a difference between a thermal expansion coefficient of said non-light-transmissive layer and a thermal expansion coefficient of said second substrate is within a range of ±50% of a thermal expansion coefficient of said first substrate over a temperature range for sealing said first and second substrates together without intentional deformation of either said first substrate or said second substrate.
Claim 3
Dependent Claim
26 words
A liquid crystal device according to claim 1, wherein one of said first and second substrates comprises one of a quartz substrate and a semiconductor substrate.
Claim 4
Dependent Claim
24 words
A liquid crystal device according to claim 1, wherein one of said first and second substrates comprises a silicon substrate having a light-transmissive portion.
Claim 5
Dependent Claim
36 words
A liquid crystal device according to claim 1, wherein one of said substrates comprises a substrate having a semiconductor circuit, and the other substrate is disposed so as to cover a semiconductor device of said circuit.
Claim 6
Dependent Claim
44 words
A liquid crystal device according to claim 1, wherein the difference between the termal expansion coefficient of said non-light-transmissive layer and the termal expansion coefficient of said second substrate is within a range of ±10% of the termal expansion coefficient of said first substrate.
Claim 7
Dependent Claim
53 words
A liquid crystal device according to claim 5, wherein the difference between the thermal expansion coefficient of said non-light-transmissive layer and the thermal expansion coefficient of said non-light-transmissive layer and the thermal expansion coefficient of said second substrate is within a range of ±5% of the thermal expansion coefficient of said first substrate.
Claim 8
Dependent Claim
135 words
An image information processor comprising: a liquid crystal device having first and second substrates opposed to each other at a predetermined distance, and a liquid crystal enclosed between said first and second substrates, said substrates being formed of different materials, said first substrate including light-transmissive and non-light-transmissive layers, wherein a difference between a thermal expansion coefficient of said non-light-transmissive layer and a thermal expansion coefficient of said second substrate is within a range of ±50% of a thermal expansion coefficient of said first substrate over a temperature range for sealing said first and second substrates together without intentional deformation of either said first substrate or said second substrate; and an image signal generation circuit for supplying an image signal to said liquid crystal device, said image signal generation circuit being provided separate from said substrates.
Claim 9
Dependent Claim
135 words
An image information processor comprising: a liquid crystal device having first and second substrates opposed to each other at a predetermined distance, and a liquid crystal enclosed between said first and second substrates, said substrates being formed of different materials, said first substrate including light-transmissive and non-light-transmissive layers, wherein a difference between a thermal expansion coefficient of said non-light-transmissive layer and a thermal expansion coefficient of said second substrate is within a range of ±50% of a thermal expansion coefficient of said first substrate over a temperature range for sealing said first and second substrates together without intentional deformation of either said first substrate or said second substrate; and an image signal generation circuit for supplying an image signal to said liquid crystal device, said image signal generation circuit being provided separate from said substrates.
Claim 10
Dependent Claim
23 words
An image information processor according to claim 7, further comprising an image sensor for generating information from which said image signal is formed.
Claim 11
Dependent Claim
26 words
An image information processor according to claim 7 or 8, further comprising recording means for recording on a recording medium information based on said image signal.
Claim 12
Dependent Claim
44 words
An image information processor according to claim 7, wherein the difference between the thermal expansion coefficient of said non-light-transmissive layer and the thermal expansion coefficient of said second substrate is within a rante of ±10% of the thermal expansion coefficient of said first substrate.
Claim 13
Dependent Claim
44 words
An image information processor according to claim 10, wherein the difference between the thermal expansion coefficient of said non-light-transmissive layer and the thermal expansion coefficient of said second substrate is within a range of ±5% of the thermal expansion coefficient of said first substrate.
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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) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |