The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2004
Filed:
Jun. 07, 2002
Hajime Akimoto, Ome, JP;
Yoshirou Mikami, Hitachiouta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A liquid crystal image display comprising differential amplifiers composed of polycrystalline Si TFTs incorporated in buffer for a signal line driver. The image display includes buffer outputting switches for turning off the outputs of the buffers and signal line shunting switches for shorting the input and output terminals of the buffer. For the first half of one horizontal period, the signal line shunting switches are held off whereas the buffer outputting switches are held on, to feed signal lines with an image signal voltage selected by level select switches through the buffers. For the second half of the horizontal period, the signal line shunting switches are held on whereas the buffer outputting switches are held off, to feed the signal lines directly with the image signal voltage selected by the level select switches, and the signal lines fed with the equal image signal voltages are shorted to prevent the brightness nonuniformity of vertical streaks, as might otherwise be caused because said buffers have different offset voltages.