The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
May. 27, 1988
Kunihiko Yamamoto, Nara, JP;
Yutaka Ishii, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
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.