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. 23, 2010
Filed:
Feb. 17, 2006
Seiichi Osawa, Oyama, JP;
Shinya Sato, Koganei, JP;
Masayuki Iwasaki, Fujimino, JP;
Takeshi Toyoda, Saitama, JP;
Seiichi Osawa, Oyama, JP;
Shinya Sato, Koganei, JP;
Masayuki Iwasaki, Fujimino, JP;
Takeshi Toyoda, Saitama, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
A first electrode of a liquid crystal cell () is composed of a plurality of concentric electrodes (to) of a concentrically circular shape, the plurality of concentric electrodes are divided into a first group of concentric electrodes () near the center and a second group of concentric electrodes () near the periphery, and a concentric electrode between the two groups is an independent single electrode (). A first correction unit that corrects spherical aberration of a high density DVD is composed of the two groups and a second correction unit that corrects aberration of a conventional DVD is composed of the first group of concentric electrodes (). In the case of correcting the aberration of the conventional DVD, the independent concentric electrode () is supplied with a voltage between the voltages respectively supplied to adjacent concentric electrodes (), (). In the case of correcting the aberration of the high density DVD, the independent concentric electrode () is supplied with a voltage equal to the voltage supplied to the concentric electrode immediately lateral thereto ().