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. 14, 1999
Filed:
Sep. 03, 1997
Wen Chun Wang, Hsinchu, TW;
Tzung-Zu Yang, Hsinchu, TW;
Industrial Technology Research Institute, Hsin-Chu, TW;
Abstract
A field emission device is described that comprises, in addition to the main, conventional array of field emission devices and its associated driving circuits, an additional, separate, pixel-sized group of field emission devices close to, but separated from, said main array. Electrons emitted by the additional pixel are collected on a separate, non fluorescent, anode and additional circuitry is provided, including a feedback loop from a detector of the additional pixel's cathode current to the gate voltage supply of the main array. Consequently the voltage of the gate lines varies in inverse proportion to the cathode current of the additional pixel. This results in a display whose brightness is constant even when turned on for the first time or after a period of idleness. A method for manufacturing the device is also described.