Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Yasuhiro Hirokane

Hiroshi Kojima

Kazuyoshi Nishi

Makoto Mizuki

Tetsuro Omori

Munehiko Ogawa

Hiroshi Kondo

A display driving device is provided which drives a display panel having source lines provided for columns of pixels and which includes: first switches swprovided for the source lines; second switches swprovided for the source lines; AMP unitswhich are provided for the source lines and drive a pixel signal to the source lines via the second switches; an external power sourceapplying an intermediate voltage of the pixel signal to an intermediate voltage line, the intermediate voltage having a level between a minimum voltage level and a maximum voltage level of the pixel signal; and a control circuitcontrolling turning on and off the first switches and the second switches, wherein the control unit temporarily turns off at least part of the second switches, and concurrently, temporarily turns on corresponding ones of the first switches during a transition period of the pixel signal.

Display driving device and display apparatus

A current driver includes a gate line having a first and second nodes, K driving transistors, a terminal and a voltage generation section. The terminal receives a first current. The voltage generation section generates a bias voltage according to a current value of the first current. The gate line receives, at one of the first and second nodes, the bias voltage generated by the voltage generation section. Gates of the K transistors are connected between the first and second nodes of the gate line. In the voltage generation section, the relationship between the first current and the bias voltage is adjusted in the first mode, according to a current value of an output current flowing in a first driving transistor of the K driving transistors, and in the second mode, according to a current value of an output current flowing in a second driving transistor of the K driving transistors.

Current driver, data driver, display device and current driving method

Growing community of inventors

Osaka, Japan

Yasuhiro Hirokane