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Modular backlighted analog/digital instrument display

  • US 4,431,966 A
  • Filed: 05/12/1981
  • Issued: 02/14/1984
  • Est. Priority Date: 05/12/1981
  • Status: Expired due to Fees
First Claim
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1. A modular analog/digital instrument display for use in a cylindrical housing comprising:

  • a base adapted to fit within said housing;

    an analog meter movement adapted to fit within said housing and mounted to said base, said meter movement including a rotatable shaft having a portion thereof extending in a direction substantially parallel to the longitudinal axis of said housing;

    a circuit board adapted to fit within said housing and mounted in a spaced-apart relationship to said meter movement, said circuit board including electrical contacts formed on at least a portion thereof, said circuit board further having an opening formed therein for receiving said meter movement shaft;

    a digital display;

    means for mounting said digital display to said circuit board including means for electrically connecting electrical contacts of said digital display with said contacts of said circuit board;

    a light collecting plate adapted to fit within said housing and mounted to said circuit board, said light collecting plate being formed from a light transmissive material and including a first opening adapted to receive at least a portion of said digital display, and a second opening adapted to receive said meter movement shaft;

    a light pipe having one end disposed within said second opening of said light collecting plate;

    an analog dial adapted to fit within said housing and mounted to said light collecting plate, said dial including light transmissive portions indicative of selected dial markings, a first opening for receiving a portion of said light pipe, and a second opening for exposing said digital display to view;

    a light transmissive dial pointer mounted to said rotatable meter shaft and arranged adjacent said dial and said light pipe; and

    means, mounted adjacent said light collecting plate and said light pipe, for illuminating said light collecting plate whereby said light transmissive portions of said dial are illuminated by light scattered by said light collecting plate, and said dial pointer is illuminated by light transmitted through said light pipe.

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