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. 19, 2001
Filed:
Nov. 25, 1998
Hiroshi Shirasawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
For saving power by recovery and reuse of charge on data lines of a matrix display panel, a data line drive device, has a simplified circuit configuration. The device comprises a matrix display panel having a plurality of data lines DL; a data line drive circuit,A for driving said data lines DL, including a plurality of switch units QP,i, QN,i (i=1 to N) interposed between a data voltage applying terminal P,and each of said data lines DL; electrostatic charge storage means C,L,for storing electrostatic charge on said data lines, which is connected to said data drive circuit,A; and a switch QS,i for recovering the charge, having a parasitic diode DS,i which is interposed between said data line drive circuit,A and each of said data lines, said charge recovering switch QS,i being brought into a conductive state when the charge on the data lines is recovered to said charge storing means C,L