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:
Nov. 14, 2006
Filed:
Dec. 20, 2005
Yohei Nakanishi, Kawasaki, JP;
Hidefumi Yoshida, Kawasaki, JP;
Takashi Sasabayashi, Kawasaki, JP;
Yasutoshi Tasaka, Kawasaki, JP;
Tetsuya Fujikawa, Kawasaki, JP;
Hidetoshi Sukenori, Kawasaki, JP;
Yohei Nakanishi, Kawasaki, JP;
Hidefumi Yoshida, Kawasaki, JP;
Takashi Sasabayashi, Kawasaki, JP;
Yasutoshi Tasaka, Kawasaki, JP;
Tetsuya Fujikawa, Kawasaki, JP;
Hidetoshi Sukenori, Kawasaki, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
AC voltage of rectangular wave is applied between a pixel electrodeA and a common electrodeA, and the amplitude Vac of the AC voltage component and the DC voltage component Vdc thereof are changed to measure the range of optimal DC component variation ΔVdc and determine a structure or material of a liquid crystal display device so as to lower ΔVdc less than a given value, wherein ΔVdc=|Vdcb−Vdcw|, Vdcb is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying black (2V), and Vdcw is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying white (7 V). Thickness of an insulating layerA on the pixel electrodeA and on the common electrodeA are the same. Electrode crossover portions are made to be in axial symmetry. The top surface of each stripe electrode of a pixel electrode has convex shape in cross section.