Semiconductor device and driver

A semiconductor device and driver capable of adequately suppressing generation of a potential difference between drive signals output by liquid crystal display drivers, and suppressing variation in display output between liquid crystal display blocks of a liquid crystal display unit by balancing the...

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Bibliographic Details
Main Authors Matsugi, Toru, Suyama, Toru
Format Patent
LanguageEnglish
Published 04.11.2004
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Summary:A semiconductor device and driver capable of adequately suppressing generation of a potential difference between drive signals output by liquid crystal display drivers, and suppressing variation in display output between liquid crystal display blocks of a liquid crystal display unit by balancing the drive performance of each liquid crystal display driver with respect to the liquid crystal display unit. Because control is performed to turn ON corresponding switching means only during drive operation of the liquid crystal display drivers to turn ON the switching means only for the liquid crystal display drivers whose drive operation has started, power is supplied via the switching means to the drive supply line of each liquid crystal display driver only from the transmission supply line of the liquid crystal display driver during drive operation. Hence voltages of the drive supply lines of the liquid crystal display drivers are held at substantially the same potential.