Lighted instrument dial face display

Details Lighted instrument dial face display Lighted instrument dial face display

1978-10-27

1980-08-12

Lechert, Jr., Stephen J.

Illumination

Illuminated scale or dial

Internal light source

362 29, 362800, G01D 1128

Patent

active

042176255

ABSTRACT:
A front lighted display for an instrument dial face and pointer, including in combination with such dial face and pointer and according to one embodiment, a plurality of light emitting diodes (LED) positioned around the inner periphery of an LED mounting and directing light rays onto the dial face, a conically shaped reflector positioned to reflect light from the LEDs onto the dial face, a center disc reflector having an LED mounted thereon to enhance illumination of the pointer hub and center area of the dial face presentation, and an LED baffle ring preventing direct viewing of the diodes, and which can have a light reflecting inner surface to redirect light from the LEDs onto the surface of the dial face. According to another embodiment incorporating a digital readout presentation on the dial face, the LEDs are positioned and oriented around the outer periphery of a lighting head to make the light rays of each diode overlap and provide a uniformly lighted dial face presentation, without utilizing the conically shaped reflector of the first embodiment. In addition, LEDs are mounted behind a digital counter mask for illumination of the digital readout presentation.

REFERENCES:
patent: 4044708 (1977-08-01), Klein

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