Fluorescent display device

Details Fluorescent display device Fluorescent display device

2005-02-15

2005-02-15

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

Reexamination Certificate

active

06856084

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.

REFERENCES:
patent: 4100455 (1978-07-01), DuBois
patent: 4803399 (1989-02-01), Ogawa et al.
patent: 5177396 (1993-01-01), Gielen et al.
patent: 5698642 (1997-12-01), Govoni et al.
patent: 5936342 (1999-08-01), Ono et al.
patent: 6441544 (2002-08-01), Ando et al.

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