Illuminating device for a display unit

Details Illuminating device for a display unit Illuminating device for a display unit

1982-11-26

1984-01-10

Lechert, Jr., Stephen J.

Illumination

Elongated source light unit or support

With or including transparent or translucent member

40582, 362225, 362240, 362241, 362247, 362297, 362307, 362308, 362310, 362318, 362328, 362329, 362330, 362346, 362347, 362348, 362349, F21S 300

Patent

active

044256043

ABSTRACT:
An illuminating device for a display unit in which the display panel can be illuminated uniformly under a relatively constant luminous intensity. The illuminating device according to the present invention comprises a display panel, at least one light source and a reflector the inner surface of which is defined by at least two elliptical surfaces. One of two foci of each of the elliptical surfaces is located at the center of the light source and the other of two foci thereof is located on the inner surface of said display panel in order to focus rays of light reflected by the reflector on an area on the display panel away from the light source.

REFERENCES:
patent: 4287554 (1981-09-01), Wolff
patent: 4344111 (1982-08-01), Ruud et al.

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