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:
Oct. 17, 2006
Filed:
Oct. 07, 2002
Noboru Toyozawa, Kanagawa, JP;
Yoshiharu Nakajima, Kanagawa, JP;
Noboru Toyozawa, Kanagawa, JP;
Yoshiharu Nakajima, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A liquid crystal display that is unsusceptible to the effect of a pixel potential during writing of data to a memory, allowing a large margin to be provided against variation in characteristics of transistors forming a pixel circuit, and a portable terminal having the liquid crystal display, serving to avoid variation in picture quality due to the variation in the transistor characteristics. In a pixel circuit including a memory circuit, separate paths are provided for writing image data from a signal line to the memory circuit via a data-write switch and for reading image data held in the memory circuit out into a liquid crystal cell unit via a data-read switch. Furthermore, image data are read via a data-read buffer. Accordingly, when image data is written to the memory, data held in the memory circuit is not affected by a pixel potential.