Seiko Epson Corporation

Michael Quinn

Yojiro Matsueda

Mutsumi Kimura

Tokuroh Ozawa

A transistor circuit is provided including a driving transistor where conductance between the source and the drain is controlled in response to a supplied voltage, and a compensating transistor where the gate is connected to one of the source and the drain, the compensating transistor being connected so as to supply input signals to the gate of the driving transistor through the source and drain. In a transistor circuit where conductance control in a driving transistor is carried out in response to the voltage of input signals, it is possible to control the conductance by using input signals of a relatively low voltage and a variance in threshold characteristics of driving transistors is compensated. With this transistor circuit, a display panel that can display picture images with reduced uneven brightness is achieved.

Transistor circuit, display panel and electronic apparatus

A digital driver circuit and method for driving a liquid-crystal device or other electro-optical display device. Drive performance of the electro-optical device is improved while keeping power consumption low. The digital driver circuit receives a digital image signal as an input and generates an analog drive signal. A series selection circuit selects one series from plural series of standard multi-ramp waves having voltages that change in steps with the passage of time depending on the value of a low-order bit of the digital image signal. A time selection circuit selects, on a time axis, a voltage that changes in steps in at least the selected series of standbard multi-ramp waves depending on the value of a high-order bit of the digital image signal.

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London, United Kingdom

Michael Quinn