Absorbing inhomogeneous film for high contrast display devices

Patent 4132919 Issued on January 2, 1979. Estimated Expiration Date:

December 12, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2312206

2331716

2616057

3042542

3560784

3825436

Multilayer anti-reflection film for ultraviolet rays
Patent #: 3936136
Issued on: 02/03/1976
Inventor: Ikeda , et al.

Plural filter system cooperating with cathode ray display with lanthanum host phosphor emissive in two colors
Patent #: 3946267
Issued on: 03/23/1976
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Anti-reflection coating having pseudo-inhomogeneous layers
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Issued on: 06/01/1976
Inventor: Kamiya , et al.

Cathode ray storage tube having a target dielectric provided with collector electrode segments extending therethrough
Patent #: 4042390
Issued on: 08/16/1977
Inventor: Steele

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Inventor

Maple, T. Grant

Assignee

Lockheed Missiles & Space Company, Inc.

Application

No. 05/859724 filed on 12/12/1977

US Classes:

313/466, Nonluminescent layer250/487.1, With optical member of material to directly modify luminous energy313/112, Polarizer or special ray transmission (e.g., filter)313/474, With optics348/834, Glare reduction359/580, Produced by coating or lamina359/589, Selective wavelength transmission or reflection427/66, Electroluminescent lamp427/68, Multicolor or mosaic (e.g., color T.V. tube, etc.)427/70, Nonmetallic coating formed by vapor deposition428/472, Refractory metal salt or oxide428/690, Fluroescent, phosphorescent, or luminescent layer428/913, MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.430/25With light-absorbing matrix on faceplate

Examiners

Primary: Ansher, Harold

Attorney, Agent or Firm

International Classes

C09K 11/77 (20060101)
H01J 29/26 (20060101)
H01J 29/18 (20060101)
H01J 29/89 (20060101)

Abstract

This invention relates to light absorbing inhomogeneous films and their use in luminescent display devices such as cathode ray tubes and electroluminescent panels to achieve high contrast ratio and minimal halation effect, and more particularly to an inhomogeneous film having a composition varying continuously from metal oxide to metal, and the method of making same. The metal is selected from the group consisting of tantalum and vanadium.