US 6,856,084 B2 · Fluorescent display device

Abstract

A fluorescent display device having a pseudo half mirror formed on a rear surface a face plate thereof and exhibiting a function like a neutral density filter. The face plate is formed on a whole rear surface thereof with an aluminum film including opening portions, non-opening portions and a solid portion. The opening and non-opening portions cooperate with each other to constitute a pseudo half mirror. The pseudo half mirror has light transmittance determined depending on a ratio in area between the opening portions and the non-opening portions. Thus, the light transmittance may be set as desired by varying the area ratio.

Claims7

Dependent claims

A fluorescent display device comprising:

a vacuum envelope constituted by a face plate, an anode-side substrate and side plates;
cathodes arranged between said face plate and said anode-side substrate;
and
a metal film for a pseudo half mirror arranged on a rear surface of said face plate and including opening portions and non-opening portions;
wherein said metal film is formed with a void portion for confirming deposition of a getter thereon.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/895,322Filed 2 Jul 2001

Priority

JP 2000-21066112 Jul 2000

Published

US 2002/0005693 A117 Jan 2002

Granted

15 Feb 2005

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

H01J 31/15
With luminescent screen: with ray or beam selectively directed to luminescent anode segments
H01J 29/896
Optical or photographic arrangements structurally combined or co-operating with the vessel: anti-reflection means, e.g. eliminating glare due to…
H01J
Electric discharge tubes or discharge lamps

Fluorescent display device

Life of this patent

Fluorescent display device

Life of this patent

Abstract

Claims7