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:
Oct. 15, 2002
Filed:
Jan. 24, 2001
Kazuo Konuma, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A field emission display includes a cathode panel having an array of electron source units for emitting electrons and a fluorescent panel distanced by a vacuum inter-space from the cathode panel. A cathode panel driver circuit is connected to the field emission display panel for controlling electron emissions from the electron source units. A fluorescent voltage supplying device is connected to the fluorescent panel for supplying a fluorescent voltage to the fluorescent panel. A current measuring device is connected to the fluorescent voltage supplying device for measuring a current value of the fluorescent voltage supplying device. A memory connected to the current measuring device receives a measured current value from the current measuring device and stores the measured current value. A correcting device is connected to the memory for receiving the measured current value for correcting control signals on the basis of the measured current value. The correcting device is also connected to the cathode panel driver circuit for transmitting the corrected control signals to the cathode panel driver circuit.