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:
Apr. 09, 2002
Filed:
Apr. 13, 1999
Kiyoshi Hidaka, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A segment electrode driving circuit of a liquid crystal driving circuit comprises: data storing means for storing therein k+1 values in accordance with the k function values and 2 k-bit data and for simultaneously outputting 2 values on the basis of the alternating signal and a field select signal; 2 power supply lines provided so as to correspond to 2 outputs of the data storing means; a first analog multiplexer for connecting each of the 2 power supply lines to one of k+1 power supplies, each of which has a potential different from each other, on the basis of a corresponding one of the 2 outputs of the data storing means corresponding to a corresponding one of the 2 power supply lines; and a second analog multiplexer, provided for each of segment electrodes, for receiving k display data corresponding to the selected k common electrodes from the RAM for display data, and for selecting one of the 2 power supply lines on the basis of the k display data to connect the selected one of the 2 power supply lines to a corresponding one of the segment electrodes. Thus, it is possible to prevent the manufacturing costs from increasing.