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, 1979
Filed:
Jul. 22, 1977
Masataka Hirasawa, Ayase, JP;
Abstract
A voltage dividing circuit provides an intermediate level potential or intermediate level potentials between the maximum and minimum level potentials necessary for dynamic- or scanning-driving a liquid crystal display device. The voltage dividing circuit includes at least one insulated gate field effect transistor and a plurality of resistive elements each with relatively small resistance connected in series between power source terminals. The insulated gate field effect transistor is enabled during a fixed time interval at the initial stage of one display cycle to provide drive voltage to the liquid crystal display device with low output resistance. A first dividing circuit including low resistive elements enabled by an insulated gate field effect transistor or transistors may be connected in parallel with a second dividing circuit including relatively high resistive elements which provides the intermediate level potential or potentials with the same level as of the first dividing circuit.