Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1988-05-27
1990-05-15
Brier, Jeffery A.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340805, G09G 336
Patent
active
049261681
ABSTRACT:
A liquid crystal display device containing an X-Y matrix type liquid crystal display panel in which these are M (M>1) signal electrodes and N (N>1) scanning electrodes are arranged in a matrix. The liquid crystral display device utilizes a device which reverses the polarity of the voltage waveform applied to the liquid crystal display panel at intervals of n (1<n<N) horizontal scanning periods. The polarity reversing timing of this waveform is set randomly for a certain predetermined number of frames, for example, every two frames. The random setting of the polarity reversing timing substantially eliminates crosstalk and linear display irregularity. The polarity reversing timing is realized by a random number generator in a reversing circuit which can be attached to a conventional liquid crystal display device such that this reversing circuit can randomly reverse the conventional polarity reversal signal.
REFERENCES:
patent: 4702560 (1987-10-01), Endo et al.
Patent Abstracts of Japan, vol. 9, No. 181 (E331) Jul. 26, 1985.
Ishii Yutaka
Yamamoto Kunihiko
Brier Jeffery A.
Sharp Kabushiki Kaisha
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