Light emission enhancing dielectric layer for EL panel

Details Light emission enhancing dielectric layer for EL panel Light emission enhancing dielectric layer for EL panel

1984-08-06

1986-09-23

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

313506, 313507, 340781, G09G 310

Patent

active

046137939

ABSTRACT:
A thin-film electroluminescent panel which has a light sink layer deposited immediately behind the phosphor layer thereof is modified to have a light emission enhancing dielectric layer deposited between the phosphor layer and the light sink layer. The light emission enhancing dielectricphosphor interface provides for injecting hot electrons for impact-exciting the luminescent centers in the phosphor to enable the panel to generate light when the front electrode of the panel is positive in potential. Moreover, the light emission enhancing dielectric layer is formed of a material having the same index of refraction as the phosphor layer so that it will pass the incident ambient light and the rearwardly directed light generated in the phosphor layer without reflection into the light sink layer wherein it is trapped by internal reflection and absorbed.

REFERENCES:
patent: 3274024 (1966-09-01), Hill et al.
patent: 3560784 (1971-02-01), Steele et al.
patent: 4369393 (1983-01-01), Frame
patent: 4455506 (1984-06-01), Ayyagari et al.

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