Patent US5479283A successfully refreshed from Google Patents.
US5479283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric liquid crystal apparatus having a threshold voltage greater than the polarization value divided by the insulating layer capacitance
Assignee: Canon Inc
•
Filing: 1994-10-11
•
Granted: 1995-12-26
•
Expires: 2014-10-11
Abstract
Abstract A liquid crystal element includes a liquid crystal exhibiting spontaneous polarization, a pair of electrode substrates for sandwiching the liquid crystal therebetween, and insulating layers formed between the electrode substrates and the liquid crystal. A spontaneous polarization P s value, in nC/cm 2 , of the liquid crystal, an interelectrode composite capacitance Ci, in nF/cm 2 , of the insulating layers, and a voltage threshold value Vth, in volts, of optical response of the liquid crystal in the liquid crystal element satisfy the following condition: ##EQU1##
Inventors
- 👤 Shuzo Kaneko
- 👤 Ryoji Fujiwara
- 👤 Akio Yoshida
- 👤 Tomoko Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:05
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/122; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3651; G09G2310/00; G09G2310/06; G09G2310/061; G09G2310/065; G09G3/2007; G09G3/2011; G09G3/207
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
87 words
A liquid crystal element comprising a liquid crystal exhibiting spontaneous polarization, a pair of electrode substrates for sandwiching said liquid crystal therebetween, and insulating layers formed between said electrode substrates and said liquid crystal, wherein a spontaneous polarization P S value, in nC/cm 2 , of said liquid crystal, an interelectrode composite capacitance Ci, in nF/cm 2 , of said insulating layers, and a voltage threshold value Vth, in volts, of optical response of said liquid crystal in said liquid crystal element satisfy the following condition: ##EQU25##
Claim 2
Dependent Claim
87 words
A liquid crystal element comprising a liquid crystal exhibiting spontaneous polarization, a pair of electrode substrates for sandwiching said liquid crystal therebetween, and insulating layers formed between said electrode substrates and said liquid crystal, wherein a spontaneous polarization P S value, in nC/cm 2 , of said liquid crystal, an interelectrode composite capacitance Ci, in nF/cm 2 , of said insulating layers, and a voltage threshold value Vth, in volts, of optical response of said liquid crystal in said liquid crystal element satisfy the following condition: ##EQU25##
Claim 3
Dependent Claim
17 words
An element according to claim 1, wherein said liquid crystal essentially consists of a ferroelectric liquid crystal.
References Cited (Backward Citations)
US4738515A
Cited
US4770502A
Cited
EP0284134A1
Cited
US4840462A
Cited
US5099344A
Cited
US5095376A
Cited
US5136408A
Cited
JPH0269547A
Cited
EP0367531A2
Cited
US5113273A
Cited
US5061044A
Cited
US5126867A
Cited
US5227900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |