Communications: electrical – Visual indication – Movable
Patent
1978-09-27
1987-01-27
Pitts, Harold I.
Communications: electrical
Visual indication
Movable
G08B 500
Patent
active
046397248
ABSTRACT:
A graphic display system, including a uniquely designed three or four element structure, forming a semi-graphic display and associated electronic components, such components being mounted in fixed relation to the semi-graphic display, for permitting the use of high density, non-illuminated, semi-graphic displays while retaining the information capability of a full functional graphic. The system includes a frame designed to support structural elements therein and to protect electrical wiring connected between electrical components mounted upon one of the elements, a matrix board. These electrical components include light sources such as light emitting diodes. In a first and second embodiment a circular polarizer screen and a transparent screen are located in front of the matrix board. The circular polarizer, which may be located in direct contact with the transparent screen, is adapted to block incident light transmitted through the polarizer from being reflected. The transparent front screen is sized to protect the polarizer and is embossed, etched or silk screened with semi-graphic information to be displayed by the system. In a third embodiment, only a transparent screen is located in front of the matrix board. The transparent screen is back silk screened in an opaque color, leaving only the semi-graphic portion transparent. The semi-graphic portion may then be back pointed in other colors, leaving transparent portions or holes for the light sources. A photoelectric device may also be used to regulate the intensity of the light sources.
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Ostfeld David M.
Pitts Harold I.
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