Patent US5506600A successfully refreshed from Google Patents.
US5506600A
Expired / Lapsed
US
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Driving apparatus
Assignee: Canon Inc
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Filing: 1994-11-10
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Granted: 1996-04-09
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Expires: 2014-11-10
Abstract
Abstract In a driving apparatus comprising: a. a control for driving matrix electrodes having scanning and information electrodes; b. a counter for counting the number of scanning electrodes to which a scanning selection signal is applied; and c. a control for designating a width of a scanning selection period for every predetermined count value.
Inventors
- 👤 Akiko Ooki
- 👤 Akira Tsuboyama
- 👤 Hiroshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:57
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/16; G09G3/18; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G2310/00; G09G2310/02; G09G2310/0224; G09G2310/0227; G09G2310/0232; G09G2320/00; G09G2320/04; G09G2320/041
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
131 words
A liquid crystal apparatus comprising: a liquid crystal display having matrix electrodes including scanning electrodes and information electrodes; driving means including means for applying a scanning selection signal to said scanning electrodes at a controlled driving frequency and means for applying information signals to said information electrodes in synchronism with the scanning selection signal, the information signals being organized in fields and a plurality of fields corresponding to a frame; and control means for controlling the driving frequency of said driving means, in a time sharing manner, said control means comprising means for setting a first number of scanning electrodes to be scanned per field and a second number of fields to correspond to each frame, and means for changing, in dependence upon an external temperature, the first and second numbers.
Claim 2
Dependent Claim
131 words
A liquid crystal apparatus comprising: a liquid crystal display having matrix electrodes including scanning electrodes and information electrodes; driving means including means for applying a scanning selection signal to said scanning electrodes at a controlled driving frequency and means for applying information signals to said information electrodes in synchronism with the scanning selection signal, the information signals being organized in fields and a plurality of fields corresponding to a frame; and control means for controlling the driving frequency of said driving means, in a time sharing manner, said control means comprising means for setting a first number of scanning electrodes to be scanned per field and a second number of fields to correspond to each frame, and means for changing, in dependence upon an external temperature, the first and second numbers.
Claim 3
Dependent Claim
36 words
An apparatus according to claim 1, wherein said driving means applies the scanning selection signal to every third or more scanning electrodes during one field so as to perform an interlace operation of at least 3:1.
Claim 4
Dependent Claim
49 words
An apparatus according to claim 2, wherein said driving means applies the scanning selection signal to said scanning electrodes such that a group of adjacent scanning electrodes are scanned during at least three consecutive fields in such an order that adjacent scanning electrodes are not scanned in successive fields.
Claim 5
Independent Claim
37 words
An apparatus according to any of claims 1 to 3, wherein the scanning selection signal is a signal having voltage levels in positive and negative directions with reference to an application voltage of a scanning nonselection signal.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1, wherein the first and second numbers are set so that a lower temperature value is less than a higher temperature value.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 1, further comprising: means for executing a temperature detecting operation.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 6, further comprising: means for performing the temperature detecting operation in accordance with a counted timing.
Claim 9
Dependent Claim
17 words
An apparatus according to claim 1, wherein said liquid crystal display is a ferroelectric liquid crystal display.
Claim 10
Dependent Claim
105 words
A liquid crystal device comprising: a liquid crystal panel having a matrix display comprising scanning electrodes, information electrodes and liquid crystal; a driving means for supplying a scanning selection signal to the scanning electrodes, and for supplying an information signal to the information electrodes synchronously with the scanning selection signal; and a control means for controlling said driving means such that at least two scanning electrodes are skipped between each pair of scanning electrodes to which the scanning selection signal is applied; wherein the number of scanning electrodes that are skipped between each pair of scanning electrodes is changed in accordance with an external temperature.
Claim 11
Dependent Claim
105 words
A liquid crystal device comprising: a liquid crystal panel having a matrix display comprising scanning electrodes, information electrodes and liquid crystal; a driving means for supplying a scanning selection signal to the scanning electrodes, and for supplying an information signal to the information electrodes synchronously with the scanning selection signal; and a control means for controlling said driving means such that at least two scanning electrodes are skipped between each pair of scanning electrodes to which the scanning selection signal is applied; wherein the number of scanning electrodes that are skipped between each pair of scanning electrodes is changed in accordance with an external temperature.
Claim 12
Dependent Claim
27 words
A liquid crystal device according to claim 9, wherein said control means comprises a temperature detection means for detecting the external temperature according to a counted timing.
Claim 13
Dependent Claim
17 words
A liquid crystal device according to claim 9, wherein the liquid crystal is a ferroelectric liquid crystal.
Claim 14
Dependent Claim
122 words
A liquid crystal device comprising: a liquid crystal panel having a matrix display comprised of scanning electrodes, information electrodes and liquid crystal; a driving means for supplying a scanning selection signal to the scanning electrodes, and for supplying an information signal to the information electrodes synchronously with the scanning selection signal; and a control means for controlling said driving means such that at least two scanning electrodes are skipped between each pair of scanning electrodes to which the scanning selection signal is applied; wherein the number of scanning electrodes that are skipped between each pair of scanning electrodes is changed in accordance with an external temperature, such that the number of scanning electrodes that are skipped increases as the external temperature decreases.
Claim 15
Dependent Claim
122 words
A liquid crystal device comprising: a liquid crystal panel having a matrix display comprised of scanning electrodes, information electrodes and liquid crystal; a driving means for supplying a scanning selection signal to the scanning electrodes, and for supplying an information signal to the information electrodes synchronously with the scanning selection signal; and a control means for controlling said driving means such that at least two scanning electrodes are skipped between each pair of scanning electrodes to which the scanning selection signal is applied; wherein the number of scanning electrodes that are skipped between each pair of scanning electrodes is changed in accordance with an external temperature, such that the number of scanning electrodes that are skipped increases as the external temperature decreases.
Claim 16
Dependent Claim
28 words
A liquid crystal device according to claim 12, wherein said control means comprises a temperature detection means for detecting the external temperature in accordance with a counted timing.
Claim 17
Dependent Claim
17 words
A liquid crystal device according to claim 12, wherein the liquid crystal is a ferroelectric liquid crystal.
References Cited (Backward Citations)
US4367924A
Cited
JPS56107216A
Cited
US4462027A
Cited
US4586791A
Cited
US4548476A
Cited
US4655561A
Cited
EP0149899A2
Cited
US4701799A
Cited
US4697887A
Cited
GB2159625A
Cited
US4709995A
Cited
US4923285A
Cited
US4902107A
Cited
US4962376A
Cited
US5091723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-09 | 1999-10-09 | 2000-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-09 | 2003-10-09 | 2004-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-09 | 2007-10-09 | 2008-04-09 | $7700.00 | Window Closed / Lapsed |