EP0065397A2
Expired / Lapsed
EP
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Thermal barrier for thermally addressed liquid crystal devices
Assignee: 3M Co
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Filing: 1982-05-07
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Granted: —
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Expires: 2002-05-07
Abstract
Abstract A thermally addressed liquid crystal display device (10) is disclosed, (see Figure 1) which includes a liquid crystal medium (11) on a substrate (13) and at least one electrode (8 1 , 8 2 , 8 3 ) in thermal contact with the liquid crystal medium for thermally addressing the medium, and in which a thermal insulative barrier is provided between the electrode and substrate to reduce heat flow from the electrode to the substrate.
Inventors
- 👤 Lu Sun
- 👤 Chi Hsiang Chung
- 👤 Loren R. Davidson
- 👤 David H. Davies
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 22:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/132
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
67 words
A thermally addressable liquid crystal device (10), comprising: a liquid crystal medium (11) supported upon a substrate (13); and means (r i , r 2 , r 3 ) for thermally addressing said liquid crystal medium including at least one electrode in thermal contact with said medium, characterized by a thermal barrier (14) disposed between said electrode and said substrate for insulating said electrode from said substrate.
Claim 2
Dependent Claim
67 words
A thermally addressable liquid crystal device (10), comprising: a liquid crystal medium (11) supported upon a substrate (13); and means (r i , r 2 , r 3 ) for thermally addressing said liquid crystal medium including at least one electrode in thermal contact with said medium, characterized by a thermal barrier (14) disposed between said electrode and said substrate for insulating said electrode from said substrate.
Claim 3
Dependent Claim
18 words
The thermally addressed liquid crystal device of claim 1, characterized by said substrate comprising a plate of glass.
Claim 4
Dependent Claim
23 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier (14b) comprising an insulating layer having voids disposed therein.
Claim 5
Dependent Claim
19 words
The thermally addressed liquid crystal device of claim 1, characterized by said electrode having a light reflective surface (41).
Claim 6
Dependent Claim
24 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier (14) comprising an insulating layer having a light reflective surface.
Claim 7
Dependent Claim
38 words
The thermally addressed liquid crystal device of claim 1, characterized by said electrode (r l , r 2 , r 3 ) and said thermal barrier (14) having light reflective coplanar surfaces (41, 42 and 31, 32, respectively).
Claim 8
Dependent Claim
23 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier (14e) comprising an insulating layer having entrained gas therein.
Claim 9
Dependent Claim
23 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier comprising an insulating layer having hollow balls dispersed therein.
Claim 10
Dependent Claim
17 words
The thermally addressed liquid crystal device of claim 8, characterized by said balls being hollow glass balls.
Claim 11
Dependent Claim
20 words
The thermally addressed liquid crystal device of claim l, characterized by said thermal barrier comprising at least one organic polymer.
Claim 12
Dependent Claim
28 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier comprising at least one polymer selected from a class consisting of imides and amides.
Claim 13
Dependent Claim
18 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier having a cellular structure.
Claim 14
Dependent Claim
22 words
l3. The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier comprising at least one imide quinoxaline polymer.
Claim 15
Dependent Claim
18 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier comprising an xylylene polymer.
Claim 16
Dependent Claim
32 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier comprising a layer of insulating material having an approximate thickness in a range from 0.5 to 100 microns.
Claim 17
Dependent Claim
40 words
The thermally addressed liquid crystal device of claim 1, characterized by said thermal barrier comprising a thermally insulating layer having a coefficient of heat conductivity approximately less than 15 x 10- 4 cal sec -1 cm -1 °C -1 .
Claim 18
Dependent Claim
77 words
A method of thermally addressing a liquid crystal device according to claim 1, characterized by the steps of: (a) supporting said liquid crystal medium for thermal addressing thereof; (b) thermally addressing said liquid crystal medium by heating said medium with at least one electrode disposed in thermal contact with said medium; and (c) insulating said medium and said electrode to allow a substantial amount of the heat generated by said electrode to be transferred to said medium.
References Cited (Backward Citations)
No citation records indexed.
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