Fluorescent backlighting unit

Details Fluorescent backlighting unit Fluorescent backlighting unit

1987-02-02

1988-05-31

Myhre, Charles J.

Illumination

Elongated source light unit or support

With or including transparent or translucent member

362260, 340700, 350345, F21S 300

Patent

active

047485469

ABSTRACT:
A lighting unit (11) for providing diffused light is particularly useful for back illumination of a flat panel active matrix display (21). The unit (11) includes one or more fluorescent lamp tubes (13,15) which are embedded in RTV rubber or other transparent potting material (29). A pair of diffusing layers (31,35) cause the light output from the unit (11) to be evenly distributed. A ground plane (27) acts as a reflector, a heat sink and permits partial-power operation. Advantages include reduced flicker and an ability to withstand rough service.

REFERENCES:
patent: 3879723 (1975-04-01), Hornung
patent: 4285029 (1981-08-01), McCoy
patent: 4346378 (1982-08-01), Shanks
patent: 4486499 (1984-12-01), Morimoto
patent: 4559480 (1985-12-01), Nobs
patent: 4618216 (1986-10-01), Suzawa
patent: 4630894 (1986-12-01), Cremers

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