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GB2139795A
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Method of driving liquid crystal matrix display
Assignee: Citizen Watch Co Ltd
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Filing: 1983-12-29
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Granted: —
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Expires: 2003-12-29
Abstract
No abstract record available.
Inventors
- 👤 Shigeru Morokawa
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-11-01 19:38
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3644
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
189 words
A method of driving a liquid crystal matrix display panel having a plurality of row electrodes coupled to receive periodically generated timing signal pulses and a plurality of column electrodes coupled to column electrode drive circuit means to receive drive signals representing display data attimings synchronized with said timing signal pulses, with a plurality of liquid crystal display elements being formed at the intersections of said row electrodes and column electrodes, said column electrodes being divided into a plurality of sets of column electrodes each driven by mutually independent drive circuit means, thereby defining a plurality of corresponding regions of said matrix display panel, whereby each of said regions operates alternately in a drive phase in which drive signals are applied to the column electrodes thereof and 45 timing signal pulses are applied to sequentially select the row electrodes thereof and a rest phase in which a potential substantially equal to zero is applied across all of the display elements of said region, and whereby while each of said regions is operating in said rest phase all of the remainder of said regions are operating in said drive phase.
Claim 2
Independent Claim
189 words
A method of driving a liquid crystal matrix display panel having a plurality of row electrodes coupled to receive periodically generated timing signal pulses and a plurality of column electrodes coupled to column electrode drive circuit means to receive drive signals representing display data attimings synchronized with said timing signal pulses, with a plurality of liquid crystal display elements being formed at the intersections of said row electrodes and column electrodes, said column electrodes being divided into a plurality of sets of column electrodes each driven by mutually independent drive circuit means, thereby defining a plurality of corresponding regions of said matrix display panel, whereby each of said regions operates alternately in a drive phase in which drive signals are applied to the column electrodes thereof and 45 timing signal pulses are applied to sequentially select the row electrodes thereof and a rest phase in which a potential substantially equal to zero is applied across all of the display elements of said region, and whereby while each of said regions is operating in said rest phase all of the remainder of said regions are operating in said drive phase.
Claim 3
Dependent Claim
44 words
A drive method according to claim 1, in which said potential substantially equal to zero in said rest 50 phase is established by setting the potentials of the column electrodes and row electrodes of a region operating in said rest phase to identical values.
Claim 4
Dependent Claim
45 words
A drive method according to claim 1, in which said potential substantially equal to zero in said rest phase is established by employing switching elements to apply a short- circuit between the column electrodes and row electrodes of a region operating in said rest phase.
Claim 5
Dependent Claim
42 words
A drive method according to claim 1, in which said timing signal pulses applied to drive said row electrodes vary between at least three different potentials and in which said drive signals applied to said column electrodes vary between two different potentials.
Claim 6
Dependent Claim
58 words
A drive method according to claim 1, in which said timing signal pulses applied to drive said row electrodes and said drive signals applied to said column electrodes each comprise trains of pulses of 60 alternating polarity, with the pulse train of said timing signal pulses being identical in polarity to that of said column electrode drive signals.
Claim 7
Dependent Claim
38 words
A drive method according to claim 1 in which said drive circuit means of said row electrodes and column electrodes comprise a complementary field-eff ect transistor switches formed in a monolithic intregrated circuit. GB 2 139 795 A
Claim 8
Dependent Claim
18 words
A drive method according to claim 6, in which said monolithic integrated circuit is of insulated substrate configuration.
Claim 9
Dependent Claim
17 words
A drive method according to claim 7, in which said monolithic integrated circuit comprises a silicon-on-saphire substrate.
Claim 10
Dependent Claim
57 words
A drive method according to claim 1, in which multiplexed driving of said row electrodes and column 5 electrodes is employed, with each column of said display elements being driven by a plurality of sets of column electrodes and with each of said row electrodes serving to drive a corresponding plurality of rows of said display elements.
Claim 11
Independent Claim
63 words
A method of driving a liquid crystal matrix display, substantially as hereinbefore described with referenceto Figure6b and Figures7a, borc, or Figures8a, band c, orFigures9a, band c; and Figure 11 of the accompanying drawings. Printed in the UK for HMSO, D8818935, 9184, 7102. Published by The Patent Office, 25 Southampton Buildings, London, WC2A lAY, from which copies may be. obtained. 4 i A 1
Claim 12
Independent Claim
63 words
A method of driving a liquid crystal matrix display, substantially as hereinbefore described with referenceto Figure6b and Figures7a, borc, or Figures8a, band c, orFigures9a, band c; and Figure 11 of the accompanying drawings. Printed in the UK for HMSO, D8818935, 9184, 7102. Published by The Patent Office, 25 Southampton Buildings, London, WC2A lAY, from which copies may be. obtained. 4 i A 1
References Cited (Backward Citations)
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