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:
May. 12, 1998
Filed:
Dec. 18, 1996
Akihiro Mihira, Mobara, JP;
Tadashi Mizohata, Mobara, JP;
Futaba Denshi Kogyo K.K., Mobara, JP;
Abstract
A fluorescent display tube has high visibility because reflection of Al of an anode conductor is prevented. A black film 3 formed on the inner surface of a substrate 2 is formed such that an inorganic metal containing compound is changed into a metal oxide by heat treatment, and consists of a TaO.sub.2 --, Tl.sub.2 O--, SnO--, or (Mn, Cu)--based oxide. An SiO.sub.2 film 4 serving as an alkali-shielding film is formed on the inner surface of the substrate 2 to cover the black film 3. An anode conductor 5 consisting of Al is formed on the SiO.sub.2 film 4. The anode conductor 5 is constituted of a frame member 6 and a stripe-shaped display unit 7 with transparency. The frame member 6 is behind the black film. The display unit 7 is partitioned by the inner edge of the gap between the black films 3. A phosphor layer 8 is formed on the display unit 7. A cross layer 9 is formed to cover the SiO.sub.2 film 4. Light emitted from the phosphor layer 8 is partitioned with respect to the appearance of the light and observed through the substrate 2. Due to the black film, the reflectance of the Al film is low, i.e., 10% or less at 530 nm. Good contrast can be obtained, and a display unit can be read easily.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile