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US 4,364,672 AGranted
Method for driving liquid crystal display elements
AssigneeHitachi, Ltd.
InventorsYoshimichi Shibuya, Masami Takahashi, Tadashi Ishibashi
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AssigneeHitachi, Ltd.
InventorsYoshimichi Shibuya, Masami Takahashi, Tadashi Ishibashi
Estimating the term…
A method for driving a liquid crystal display element so as to give a simultaneous analogue display of 3 kinds of information. The liquid crystal display element is driven over 1/3-duty periods by applying 4 kinds of voltage waveforms to one electrode formed on one of paired substrates, and at least 5 kinds of voltage waveforms to the other electrode on the other substrate, said electrodes being divided into a multiplicity of electrode patterns. In particular, one of the 4 kinds of voltage waveforms applied to the electrodes of one of said substrates is set to provide an OFF condition for the display regardless of which of the at least 5 voltage waveforms is applied to the electrodes of said other substrate. In this driving method only one chip of the element driving LSI is sufficient for a simultaneous analogue display of 3 kinds of information e.g. hour, minute, and second.
A method for driving a liquid crystal display element disposed between a pair of substrates and having electrodes on the substrates, said electrodes being divided into a multiplicity of blocks to give an analogue display of at least 3 kinds of information, wherein said liquid crystal is driven over a 1/3-duty period by applying four kinds of voltage waveforms to the electrodes on one of said substrate and at least five kinds of voltage waveforms to the electrodes on the other substrate, thereby simultaneously displaying three arbitrary pieces of the information, and wherein one of said four kinds of voltage waveforms applied to the electrodes of one of said substrates is set to provide an OFF condition for the display regardless of which of the at least five voltage waveforms is applied to the electrodes of said other substrate.
Dependencies are inferred from the claim text.