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:
Dec. 26, 2000
Filed:
May. 25, 1999
Ronald L Hansen, San Jose, CA (US);
Candescent Technologies Corporation, San Jose, CA (US);
Abstract
A field emission display of uniform brightness across the entire display screen. The field emission display according to the present invention includes row lines, column lines, and electron-emissive elements disposed at intersections of the row lines and column lines. The field emission display according to the present invention further includes row drivers coupled to selectively activate the row lines one row at a time and column drivers coupled to drive column voltages over the column lines. According to the present invention, the column voltages are derived from gray-scale data and a compensating voltage signal that represents a row position of the currently activated row line. In one embodiment of the present invention, the farther the currently activated row line is away from the driven ends of the column lines, the higher is the compensating voltage. Consequently, visual artifacts, specifically those caused by degradation of signals along the column lines attributed to transmission line effects, are significantly reduced or eliminated.