Electroluminescent backing sheet for reading and writing in the

Details Electroluminescent backing sheet for reading and writing in the Electroluminescent backing sheet for reading and writing in the

1975-12-09

1977-05-17

Borchelt, Archie R.

Radiant energy

Luminophor irradiation

Self-luminous article

313498, F21K 200

Patent

active

040244040

ABSTRACT:
An energy saving electroluminescent backing sheet or panel for back lighting of writing sheets, drawing sheets or sheets having reading or other intelligible matter thereon the backing sheet having a unitarily associated light-weight light activating source capable of providing a low level nondistracting light output which permits its portable use for reading and writing in the dark without need for external light.

REFERENCES:
patent: 2791723 (1957-05-01), Nagy et al.
patent: 2981858 (1961-04-01), O'Connell
patent: 3153745 (1964-10-01), Gurian et al.
patent: 3252035 (1966-05-01), Buck, Jr.
patent: 3497750 (1970-02-01), Knochel et al.
patent: 3885196 (1975-05-01), Fischer

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