Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1995-06-05
1997-09-23
Patel, Ashok
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313507, 428917, 428690, H01J 162, H05B 3314
Patent
active
056708394
ABSTRACT:
The object of the invention is to provide UV light of increased luminous intensity. Layered on one surface of a translucent substrate are a transparent electrode, a first insulating layer, an EL layer, a second insulating layer, and a metal electrode, in that order. A compound of the general formula: Zn.sub.(1-x) Mg.sub.x S is selected as a host material of the EL layer, and Gd or a Gd compound is selected as the luminescence center. The composition ratio x of the compound selected as a host material is selected to be within the range of 0.33.ltoreq.x<1, and preferably within the range of from 0.4-0.8, inclusive. This selection allows the band gap energy of the host material to be higher than the band gap energy of the luminescence center, thus preventing the absorption of the emitted light by the host material and providing UV light of increased luminous intensity.
REFERENCES:
patent: 4869973 (1989-09-01), Nishikawa et al.
patent: 4975338 (1990-12-01), Kageyama et al.
patent: 5086252 (1992-02-01), Kido
patent: 5270614 (1993-12-01), Kitagawa et al.
patent: 5314759 (1994-05-01), Harkonen et al.
patent: 5444268 (1995-08-01), Miyakoshi et al.
Physical Properties, Spectrum of Rare-Earth Elements, pp. 387-397, Yukito Takanabe May 1963.
Applied Physice, vol. 40, No. 6, Light-emission of Lanthanide Element Ions in the Solid Matter, pp. 669-678, Eiichiro Nakazawa Mar. 1971.
"Photopumped Blue Lasers . . . ZnMgSSe" by Yuko Morinaga et al.; Jpn. J. Appl. Phys. vol. 32 (1993) pp. 678-680.
"Electroluminescence of . . . Ions" by Noboru Miura et al.; Jpn. J. Appl. Phys. vol. 31 (1992) pp. 51-59.
Mikami Akiyoshi
Noma Mikihiro
Patel Ashok
Sharp Kabushiki Kaisha
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