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:
Sep. 21, 1999
Filed:
Aug. 27, 1997
Satoshi Yamaguchi, Mobara, JP;
Haruhisa Hirakawa, Mobara, JP;
Kazuhiko Tsuburaya, Mobarashi, JP;
Masaharu Tomita, Mobarashi, JP;
Tatsuo Yamamura, Mobara, JP;
Futaba Denshi Kogyo K.K., Mobara, JP;
Abstract
A field emission display device of the type driven on a high anode voltage to accelerate effectively emitted electrons to the anode, thus providing high brightness as well as no leakage of glowed light. Cone emitters are formed on the cathode electrode laying on a cathode substrate. An insulating layer as well as first gate electrodes are formed on the portions where the emitters are not formed. Another insulating layer if formed on the first gate electrodes. Second gate electrodes (or focusing electrodes) with openings are formed over the first gate electrodes. Plural lines of the emitters are formed in parallel in the emitter area corresponding one pixel. The emitters are aligned to each of the openings. An anode voltage of 2kV to 5kV is applied to the anode electrode (not shown). The electrons from the emitters are focused by the focusing electrode and the reaches the anode electrode.