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:
Jul. 05, 2005
Filed:
Aug. 23, 2001
Sashiro Uemura, Mie, JP;
Takeshi Nagasako, Mie, JP;
Junko Yotani, Mie, JP;
Hiroyuki Kurachi, Mie, JP;
Hiromu Yamada, Mie, JP;
Tomotaka Ezaki, Mie, JP;
Sashiro Uemura, Mie, JP;
Takeshi Nagasako, Mie, JP;
Junko Yotani, Mie, JP;
Hiroyuki Kurachi, Mie, JP;
Hiromu Yamada, Mie, JP;
Tomotaka Ezaki, Mie, JP;
Noritake Co., Ltd,, Aichi, JP;
Abstract
A vacuum fluorescent display includes a cathode electrode, grid electrode, anode electrode, at least one envelope, phosphor screen, and cap. The cathode electrode emits electrons. The grid electrode extracts the electrons from the cathode electrode. The anode electrode accelerates the electrons extracted from the cathode electrode. The envelope accommodates the cathode electrode, grid electrode, and anode electrode in a vacuum space and has a phosphor screen plate having light transmission properties. The phosphor screen is formed on an inner surface of the phosphor screen plate of the envelope and adapted to emit light upon bombardment of the electrons accelerated by the anode electrode. The cap is made of an X-ray shielding material and supported outside the envelope so as to surround the phosphor screen plate of the envelope through a gap. The cap has a light exit portion from which the light emitted from the phosphor screen emerges through the phosphor screen plate of the envelope.