Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1986-04-15
1989-09-26
Moore, David K.
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313509, H05B 3302
Patent
active
048703222
ABSTRACT:
In an electroluminescent panel comprising a transparent electrode, a back electrode, and an electroluminescent layer between the transparent and the back electrodes, an intermediate layer is interposed between the electroluminescent layer and the back electrode and essentially consists of germanium and nitrogen. The intermediate layer serves as a light absorption layer for absorbing ambient light. A nitrogen distribution in the intermediate layer may be either substantially uniform or decreased from the electroluminescent layer side towards the back electrode side. The decrease may be made stepwise or continuously. The intermediate layer may be superposed through a dielectric layer or directly on the electroluminescent layer. Only oxygen may be added in intermediate layer to the germanium and the nitrogen, to provide either a substantially uniform oxygen distribution or a variable oxygen distribution which is continuously or stepwise decreased from the electroluminescent layer side towards the back electrode side.
REFERENCES:
patent: 4188565 (1980-02-01), Mizukami et al.
patent: 4287449 (1981-09-01), Takeda et al.
patent: 4455509 (1984-06-01), Ayyagori et al.
patent: 4492281 (1985-01-01), Ovshinsky et al.
patent: 4532454 (1985-07-01), Abdalla
Matsudaira Takeo
Shimizu Yasumoto
Hoya Corporation
Moore David K.
O'Shea Sandra L.
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