EP0512397A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal device, display apparatus using same and display method using same
Assignee: Canon Inc
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Filing: 1992-04-29
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Granted: —
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Expires: 2012-04-29
Abstract
Abstract The liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a stretched porous polymer film having open pores and a low-molecular weight mesomorphic compound impregnating the polymer film. The display layer further comprises a porous polymer film having a three dimensional network structure characterized by a fibril diameter of at most 0.3 micron, and a low-molecular weight mesomorphic compound impregnating the polymer film. The display layer still further comprises a first display layer comprising a porous film and a low-molecular weight mesomorphic compound impregnating the porous film, and a second display layer comprising the low-molecular weight mesomorphic compound. <IMAGE>
Inventors
- 👤 Kazuo C/O Canon Kabushiki Kaisha Yoshinaga
- 👤 Ryoji c/o Canon Kabushiki Kaisha Fujiwara
- 👤 Yomishi C/O Canon Kabushiki Kaisha Toshida
- 👤 Toshikazu C/O Canon Kabushiki Kaisha Ohnishi
- 👤 Koichi C/O Canon Kabushiki Kaisha Sato
- 👤 Takeo C/O Canon Kabushiki Kaisha Eguchi
- 👤 Tsuyoshi c/o Canon Kabushiki Kaisha Shibata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1334; C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544; G02F1/13345; G02F1/1347
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
42 words
A liquid crystal device, comprising: a pair of electrode plates, and a display layer disposed between the electrode plates; said display layer comprising a stretched porous polymer film having open pores, and a low-molecular weight mesomorphic compound impregnating said porous polymer film.
Claim 2
Dependent Claim
20 words
A device according to Claim 1, wherein said porous polymer film has a surface energy of at most 25 dyn/cm.
Claim 3
Dependent Claim
13 words
A device according to Claim 1, wherein said porous polymer film comprises polytetrafluoroethylene.
Claim 4
Dependent Claim
21 words
A device according to Claim 1, wherein said low-molecular weight mesomorphic compound has a volume fraction of at least 80 %.
Claim 5
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to Claim 1, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 6
Dependent Claim
28 words
A display method, comprising: illuminating a liquid crystal device according to Claim 1 with light and effecting display by separating said light into transmitted light and scattered light.
Claim 7
Dependent Claim
42 words
A method, according to Claim 6, wherein an electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
Claim 8
Dependent Claim
55 words
A liquid crystal device, comprising: a pair of electrode plates, and a display layer disposed between the electrode plates; said display layer comprising a porous polymer film having a three-dimensional network structure characterized by a fibril having a diameter of at most 0.3 micron, and a low-molecular weight mesomorphic compound impregnating said porous polymer film.
Claim 9
Dependent Claim
20 words
A device according to Claim 8, wherein said porous polymer film has a surface energy of at most 25 dyn/cm.
Claim 10
Dependent Claim
13 words
A device according to Claim 8, wherein said porous polymer film comprises polytetrafluoroethylene.
Claim 11
Dependent Claim
21 words
A device according to Claim 8, wherein said low-molecular weight mesomorphic compound has a volume fraction of at least 80 %.
Claim 12
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to Claim 8, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 13
Dependent Claim
28 words
A display method, comprising: illuminating a liquid crystal device according to Claim 8 with light and effecting display by separating said light into transmitted light and scattered light.
Claim 14
Dependent Claim
42 words
A method, according to Claim 13, wherein an electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
Claim 15
Dependent Claim
55 words
A liquid crystal device, comprising: a pair of electrode plates, and a first display layer and a second display layer disposed between the electrode plates; wherein said first display layer comprises a porous film and a low-molecular weight mesomorphic compound impregnating said porous film, and said second display layer comprises the low-molecular weight mesomorphic compound.
Claim 16
Dependent Claim
19 words
A device according to Claim 15, wherein said second display layer has a thickness of 0.5 to 15 microns.
Claim 17
Dependent Claim
13 words
A device according to Claim 15, wherein said porous film comprises a polymer.
Claim 18
Dependent Claim
23 words
A device according to Claim 15, wherein a thin film transistor is formed on the electrode plate having thereon said second display layer.
Claim 19
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to Claim 15, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 20
Dependent Claim
28 words
A display method, comprising: illuminating a liquid crystal device according to Claim 15 with light and effecting display by separating said light into transmitted light and scattered light.
Claim 21
Dependent Claim
42 words
A method, according to Claim 20, wherein an electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
References Cited (Backward Citations)
No citation records indexed.
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