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. 29, 2011
Filed:
Jan. 08, 2007
Masaru Iizuka, Tokyo, JP;
Iori Shiraishi, Tokyo, JP;
Sosuke Tsuji, Tokyo, JP;
Hiroto Kinno, Tokyo, JP;
Masaru Iizuka, Tokyo, JP;
Iori Shiraishi, Tokyo, JP;
Sosuke Tsuji, Tokyo, JP;
Hiroto Kinno, Tokyo, JP;
Renesas Electronic Corporation, Kawasaki-shi, JP;
Abstract
The present invention provides a display control semiconductor integrated circuit having therein a RAM, capable of repairing a defective bit included in the RAM and improving the yield without significantly increasing the occupation area. A liquid crystal controller/driver in which a RAM for storing display data is provided in a chip and the storage capacity of the built-in RAM is determined according to the size of a display screen of a liquid crystal panel to be driven, includes a fuse circuit for setting a defect address, and a comparing circuit for comparing the defect address set in the fuse circuit with an input address. The liquid crystal controller/driver also has a redundant circuit, when the addresses match each other, for replacing the input address with an address that instructs the spare memory area and supplying the address to an address decoder.