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:
Feb. 26, 2008
Filed:
Jul. 17, 2006
Masaki Toriumi, Chiba, JP;
Mitsuru Tanaka, Chiba, JP;
Yuji Obara, Chiba, JP;
Kenichi Furumata, Chiba, JP;
Masaki Toriumi, Chiba, JP;
Mitsuru Tanaka, Chiba, JP;
Yuji Obara, Chiba, JP;
Kenichi Furumata, Chiba, JP;
Futaba Corporation, Chiba, JP;
Abstract
A display apparatus includes a field emission device including a first electrode serving as a display plate on which phosphor material is coated, and a second and a third electrode for emitting electrons to be ejected onto the first electrode, wherein the phosphor material emits light when the electrons are ejected thereonto; a voltage application unit for applying driving voltages to the second and the third electrode to control an emitted amount of the electrons in accordance with display data and allow a specific part of the phosphor material to emit light; and a brightness control unit for controlling an emission brightness of the phosphor material. The brightness control unit includes a first electrode current detection unit, a display data amount estimation unit, a comparing unit, a preset value generation unit, an average turn-on rate detection unit, an average turn-on rate analysis unit, and a selection unit.