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. 14, 1998
Filed:
Jan. 24, 1994
Charles F Neugebauer, San Jose, CA (US);
Arithmos, Inc., Santa Clara, CA (US);
Abstract
A novel electronic apparatus for driving passive x-y addressed liquid crystal displays (LCDs) and having improved display performance is disclosed and claimed. This apparatus is comprised of row driving integrated circuits capable of driving row lines of the LCD with a pattern of voltages corresponding to the basis vectors of a linear transform matrix. Column driver circuits containing analog CMOS pixel memory store video information and compute the linear transform of the pixel matrix. High voltage amplifier circuits to drive the column lines with voltages corresponding to the linear transform of the pixel matrix columns can be monolithically integrated with the transform computation circuitry. The LCD screen inherently performs the inverse transform and displays the desired pixel matrix. The speed and contrast of the LCD are improved, allowing the display of video rate images on passive LCD screens.