Matsushita Electric Industrial Co., Ltd.

Yoshiyuki Konishi

Yoshito Date

Tomokazu Kojima

Yasuyuki Doi

Tetsuro Ohmori

Takahito Kushima

Tooru Suyama

Kazuhiko Nagaoka

Tsutomu Sakakibara

Miki Fujino

Tsukasa Kawahara

Masahiro Akabori

Kenji Miyake

Shinji Miyamoto

A compact-size driving voltage controller is provided which can be driven with low power. The compact-size driving voltage controller which can be driven with low power includes a High output operational amplifier and a Low output operational amplifier for supplying driving voltages VcomH, VcomL to a load such as a liquid crystal display panel, an output switch for alternating between the outputs of the operational amplifiers, a Low voltage setting operational amplifier for generating a set voltage to be supplied to the non-inverted input terminal of the Low output operational amplifier, a set voltage generator including a current mirror circuit and a clamping circuit, a bias current controller for controlling the bias current flowing in each operational amplifier with a predetermined timing, and a timing controller for controlling the changeover timing of the output switch.

Driving voltage controller

Growing community of inventors

Oumihachiman, Japan

Yoshiyuki Konishi