US5058994A
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US
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Liquid crystal apparatus
Assignee: Canon Inc
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Filing: 1988-11-14
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Granted: 1991-10-22
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Expires: 2008-11-14
Abstract
Abstract A liquid crystal apparatus comprises a) a liquid crystal device comprising an electrode matrix composed of scanning electrodes and data electrodes, and a ferroelectric liquid crystal; and b) a driving means. The driving means includes a first drive means for applying a scanning selection signal two or more scanning electrodes apart in one vertical scanning so at to effect in one picture scanning in plural times of vertical scanning, and a second drive means for applying data signals in synchronism with the scanning selection signal. <IMAGE>
Inventors
- 👤 Tadashi Mihara
- 👤 Hiroshi Inoue
- 👤 Atsushi Mizutome
- 👤 Akira Tsuboyama
- 👤 Osamu Taniguchi
- 👤 Yoshihiro Onitsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3607; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/364; G02F1/134345; G09G2310/00; G09G2310/02; G09G2310/0224; G09G2310/0227; G09G2310/06; G09G2310/061; G09G2310/065; G09G2320/00; G09G2320/02; G09G2320/0247; G09G3/2007; G09G3/2074
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
A liquid crystal apparatus, comprising: a) a liquid crystal device comprising an electrode matrix comprising a plurality of substantially parallel scanning electrodes and data electrodes intersecting said scanning electrodes, and a liquid crystal; and b) drive means including first drive means for sequentially applying a scanning selection signal to said scanning electrodes two or more scanning electrodes apart between successively selected scanning electrodes in one vertical scanning and for effecting one picture scanning by scanning said scanning electrodes in at least two vertical scannings, wherein during a latter one of two consecutive vertical scannings of the at least two vertical scannings in one picture scanning, the scanning selection signal is applied to scanning electrodes which are not adjacent to scanning electrodes to which the scanning signal is applied in a former one of the two consecutive vertical scannings, and second drive means for applying data signals in synchronism with the scanning selection signal.
Claim 2
Dependent Claim
153 words
A liquid crystal apparatus, comprising: a) a liquid crystal device comprising an electrode matrix comprising a plurality of substantially parallel scanning electrodes and data electrodes intersecting said scanning electrodes, and a liquid crystal; and b) drive means including first drive means for sequentially applying a scanning selection signal to said scanning electrodes two or more scanning electrodes apart between successively selected scanning electrodes in one vertical scanning and for effecting one picture scanning by scanning said scanning electrodes in at least two vertical scannings, wherein during a latter one of two consecutive vertical scannings of the at least two vertical scannings in one picture scanning, the scanning selection signal is applied to scanning electrodes which are not adjacent to scanning electrodes to which the scanning signal is applied in a former one of the two consecutive vertical scannings, and second drive means for applying data signals in synchronism with the scanning selection signal.
Claim 3
Dependent Claim
33 words
An apparatus according to claim 1, wherein said first drive means comprises means for applying the scanning selection signal to said scanning electrodes 4 or more scanning electrodes apart in one vertical scanning.
Claim 4
Dependent Claim
31 words
An apparatus according to claim 1, wherein said first drive means comprises means for applying the scanning selection signal to said scanning electrodes 5-20 scanning electrodes apart in one vertical scanning.
Claim 5
Dependent Claim
54 words
An apparatus according to claim 1, wherein said first drive means comprises means for applying the scanning selection signal to said scanning electrodes N scanning electrodes apart (N is an integer of 2, 3, 4, . . .) in one vertical scanning, and one picture scanning is effected in (N+1) times of vertical scanning.
Claim 6
Dependent Claim
47 words
An apparatus according to claim 1, wherein the scanning selection signal is a signal having a voltage of one polarity and a voltage of the other polarity with respect to the voltage level of a scanning electrode to which the scanning selection signal is not being applied.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 1, wherein said liquid crystal comprises a ferroelectric liquid crystal.
Claim 8
Dependent Claim
279 words
A liquid crystal apparatus, comprising: a) a liquid crystal device comprising an electrode matrix comprising a plurality of substantially parallel scanning electrodes and data electrodes intersecting said scanning electrodes, and a liquid crystal; and b) driving means including first drive means for sequentially applying a scanning selection signal to said scanning electrodes two or more scanning electrodes apart between successively selected scanning electrodes in one vertical scanning and for effecting one picture scanning by scanning said scanning electrodes in at least two vertical scannings, wherein during a latter one of two consecutive vertical scannings of the at least two vertical scannings in one picture scanning, the scanning selection signal is applied to scanning electrodes which are not adjacent to scanning electrodes to which the scanning signal is applied in a former one of the two consecutive vertical scannings, the scanning selection signal comprising a former voltage of one polarity and a latter voltage of the other polarity with respect to the voltage level of a non-selected scanning electrode; and second drive means for applying to all or a prescribed part of the data electrodes a voltage signal providing a voltage for causing one orientation state of the liquid crystal in combination with the former voltage of one polarity of the scanning selection signal, and applying to a selected data electrode among said all or a prescribed part of the data electrodes a voltage signal providing a voltage for causing the other orientation state of the liquid crystal and to the other data electrodes a voltage signal providing a voltage not changing the previous state of the liquid crystal, respectively, in combination with the latter voltage of the other polarity.
Claim 9
Dependent Claim
279 words
A liquid crystal apparatus, comprising: a) a liquid crystal device comprising an electrode matrix comprising a plurality of substantially parallel scanning electrodes and data electrodes intersecting said scanning electrodes, and a liquid crystal; and b) driving means including first drive means for sequentially applying a scanning selection signal to said scanning electrodes two or more scanning electrodes apart between successively selected scanning electrodes in one vertical scanning and for effecting one picture scanning by scanning said scanning electrodes in at least two vertical scannings, wherein during a latter one of two consecutive vertical scannings of the at least two vertical scannings in one picture scanning, the scanning selection signal is applied to scanning electrodes which are not adjacent to scanning electrodes to which the scanning signal is applied in a former one of the two consecutive vertical scannings, the scanning selection signal comprising a former voltage of one polarity and a latter voltage of the other polarity with respect to the voltage level of a non-selected scanning electrode; and second drive means for applying to all or a prescribed part of the data electrodes a voltage signal providing a voltage for causing one orientation state of the liquid crystal in combination with the former voltage of one polarity of the scanning selection signal, and applying to a selected data electrode among said all or a prescribed part of the data electrodes a voltage signal providing a voltage for causing the other orientation state of the liquid crystal and to the other data electrodes a voltage signal providing a voltage not changing the previous state of the liquid crystal, respectively, in combination with the latter voltage of the other polarity.
Claim 10
Dependent Claim
33 words
An apparatus according to claim 7, wherein said first drive means comprises means for applying the scanning selection signal to said scanning electrodes 4 or more scanning electrodes apart in one vertical scanning.
Claim 11
Dependent Claim
31 words
An apparatus according to claim 7, wherein said first drive means comprises means for applying the scanning selection signal to said scanning electrodes 5-20 scanning electrodes apart in one vertical scanning.
Claim 12
Dependent Claim
55 words
An apparatus according to claim 7, wherein said first drive means comprises means for applying the scanning selection signal to said scanning electrodes N scanning electrodes apart (N is an integer of 2, 3, 4, . . . ) in one vertical scanning, and one picture scanning is effected in (N+1) times of vertical scanning.
Claim 13
Dependent Claim
15 words
An apparatus according to claim 7, wherein said liquid crystal comprises a ferroelectric liquid crystal.
Claim 14
Dependent Claim
306 words
A liquid crystal apparatus, comprising: a liquid crystal device comprising an electrode matrix comprising a plurality of substantially a liquid crystal device comprising an electrode matrix comprising a plurality of substantially parallel scanning electrodes and data electrodes intersecting said scanning electrodes, and a liquid crystal; driving means including a first drive means for sequentially applying a scanning selection signal to said scanning electrode two or more scanning electrodes apart between successively selected scanning electrodes in one vertical scanning and for effecting one picture scanning by scanning said scanning electrodes in at least two vertical scannings, and second drive means for applying data signals in synchronism with the scanning selection signal, and wherein during a latter one of two consecutive vertical scannings of the at least two vertical scannings in one picture scanning, the scanning selection signal is applied to scanning electrodes which are not adjacent to scanning electrodes to which the scanning signal is applied in a former one of the two consecutive vertical scannings, the scanning selection signal comprising a former voltage of one polarity and a latter voltage of the other polarity with respect to the voltage level of a non-selected scanning electrode; second drive means for applying to all or a prescribed part of the data electrodes a voltage signal providing a voltage for causing one orientation state of the liquid crystal in combination with the former voltage of one for causing the other orientation state of the liquid crystal and to other data electrodes a voltage signal providing a voltage not changing the previous state of the liquid crystal, respectively, in combination with the latter voltage of the other polarity; and polarizing means having polarization axes crossing each other which are so disposed that a dark optical state is formed when the liquid crystal is oriented to said one orientation state thereof.
Claim 15
Dependent Claim
306 words
A liquid crystal apparatus, comprising: a liquid crystal device comprising an electrode matrix comprising a plurality of substantially a liquid crystal device comprising an electrode matrix comprising a plurality of substantially parallel scanning electrodes and data electrodes intersecting said scanning electrodes, and a liquid crystal; driving means including a first drive means for sequentially applying a scanning selection signal to said scanning electrode two or more scanning electrodes apart between successively selected scanning electrodes in one vertical scanning and for effecting one picture scanning by scanning said scanning electrodes in at least two vertical scannings, and second drive means for applying data signals in synchronism with the scanning selection signal, and wherein during a latter one of two consecutive vertical scannings of the at least two vertical scannings in one picture scanning, the scanning selection signal is applied to scanning electrodes which are not adjacent to scanning electrodes to which the scanning signal is applied in a former one of the two consecutive vertical scannings, the scanning selection signal comprising a former voltage of one polarity and a latter voltage of the other polarity with respect to the voltage level of a non-selected scanning electrode; second drive means for applying to all or a prescribed part of the data electrodes a voltage signal providing a voltage for causing one orientation state of the liquid crystal in combination with the former voltage of one for causing the other orientation state of the liquid crystal and to other data electrodes a voltage signal providing a voltage not changing the previous state of the liquid crystal, respectively, in combination with the latter voltage of the other polarity; and polarizing means having polarization axes crossing each other which are so disposed that a dark optical state is formed when the liquid crystal is oriented to said one orientation state thereof.
Claim 16
Dependent Claim
15 words
An apparatus according to claim 12, wherein said liquid crystal comprises a ferroelectric liquid crystal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |