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. 21, 2000
Filed:
Oct. 07, 1993
Isao Takita, Fujisawa, JP;
Tsutomu Furuhashi, Yokohama, JP;
Hiroyuki Nitta, Fujisawa, JP;
Toshio Futami, Mobara, JP;
Satoru Tsunekawa, Higashimurayama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A liquid-crystal display system comprising a voltage divider circuit, and a gate circuit. The voltage divider circuit divides n voltages of n different voltage levels supplied from a power source for liquid-crystal displays, into m voltages of m different voltage levels (n<m), n and m are integers large than 1 corresponding to display data. A control signal commands the gate circuit to deliver a first voltage during the first period of one horizontal scanning cycle, and to deliver a second voltage during the second period thereof subsequent to the first period. In response to the control signal, the gate circuit corrects a signal corresponding to the display data and delivers the corrected signal during the first period so as to select a circuit which has a time constant not exceeding that of a circuit for delivering a voltage corresponding to the display data, from among circuits for supplying the m divisional voltages, and it delivers the signal left intact, during the second period. The voltage divider circuit is supplied with the output signal of the gate circuit, and it selects and delivers the voltage. Thus, the selected voltage is delivered directly without a buffer, and the liquid-crystal panel of the display system can be quickly driven.