Claims
- 1. In a liquid crystal display device comprising:
- a plurality of row conductors;
- a plurality of column conductors each intersecting said row conductors in a matrix configuration so that intersections define a display element whereby an electric potential applied across a pair of said row and column conductors above a threshold value energies and turns on said display element; means for cyclically applying electrical row drive signals to said row conductors, said row drive signals having a cycle time T divided into an integral number of excitation intervals of predetermined duration;
- means for cyclically applying electrical column drive signals to said column conductors, said column drive signals varying, in said excitation intervals, at first and second potential levels and a reference potential level between said first and second potential levels whereby when the electric potential caused by said row and column drive signals applied to said row and column conductors respectively is above said threshold value said display element attain a display state whereas when said electric potential is below said threshold value said display element attain a non-display state;
- the improvement wherein:
- said row drive signals have said first and second potential levels, different from said reference potential level, during one of said excitation intervals and said row drive signals have an identical potential level equal to one of said first and second potential levels and different from said reference potential level during the other of said excitation intervals of said predetermined duration.
- 2. In a liquid crystal display device comprising:
- first and second row conductors;
- a plurality of column conductors each intersecting said row conductors in a matrix configuration so that intersections define a display element whereby an electric potential applied across a pair of said row and column conductors above a threshold value energizes and turns on said display element;
- means for cyclically applying electrical first and second row drive signals to said first and second row conductors, respectively, said row drive signals having a cycle time T divided into first and second excitation intervals of predetermined duration;
- means for cyclically applying electrical column drive signals to said plurality of column conductors, said column drive signals varying, in said excitation intervals, at first and second potential levels and a reference potential level between said first and second potential levels when whereby the electric potential caused by said row and column drive signals applied to said row and column conductors respectively is above said threshold value said display element attain a display state whereas when said electric potential is below said threshold value said display element attain a non-display state;
- the improvement wherein:
- said first and second row drive signals have said first and second potential levels, respectively, different from said reference potential level, during said first excitation interval and said row drive signals have an identical potential level equal to one of said first and second potential levels and different from said reference potential level during said second excitation interval of said predetermined duration, whereby either said first and second row conductors can be excited during either one of said excitation intervals.
- 3. In a liquid crystal display device comprising:
- a plurality of row conductors;
- a plurality of column conductors each intersecting said row conductors in a matrix configuration so that intersections define a display element whereby an electric potential applied across a pair of said row and column conductors above a threshold value energizes and turns on said display element;
- means for cyclically applying electrical row drive signals to said row conductors, said row drive signals having a cycle time T divided into an integral number of excitation intervals of predetermined duration;
- means for cyclically applying electrical column drive signals to said column conductors, said column drive signals varying, in said excitation intervals, at first and second potential levels and a reference potential level between said first and second potential levels whereby when the electric potential caused by said row and column drive signals applied to said row and column conductors respectively is above said threshold value said display element attain a display state whereas when said electric potential is below said threshold value said display element attain a non-display state;
- the improvement wherein:
- a pair of selected ones of said row drive signals have said first and second potential levels, different from said reference potential level, during one of said excitation intervals and simultaneously a remaining one of said row drive signals has said reference potential level, whereas, during another one of said excitation intervals, another pair of the other selected ones of said row drive signals have said first and second potential levels and simultaneously another remaining one of said row drive signals has said reference potential level, whereby two adjacent row conductors at a time are selected by said row drive signals, to enable display elements associated therewith to be driven into excitation.
Priority Claims (2)
Number |
Date |
Country |
Kind |
52-14287 |
Feb 1977 |
JPX |
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52-50584 |
Apr 1977 |
JPX |
|
Parent Case Info
This is a continuation, of application Ser. No. 877,032, filed Feb. 10, 1978 and now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
Date |
Country |
Parent |
877032 |
Feb 1978 |
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