Patent Number: 7,042,432

Title: Thin-film transistor circuit and a semiconductor display using the same

Abstract: To provide thin-film transistor circuits used for a driving circuit that realizes a semiconductor display capable of producing an image with high resolution and high precision without image unevenness. TFTs with small channel widths are used to form an analog buffer which comprises a differential amplifier circuit and a current mirror circuit and which is used in a driving circuit of an active matrix semiconductor display. A plurality of such analog buffer circuits are connected in parallel to secure an analog buffer that has a sufficient current capacity.

Inventors: Yamazaki; Shunpei (Tokyo, JP), Koyama; Jun (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

International Classification: G09G 3/36 (20060101)

Expiration Date: 5/09/02018