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Digital display system for variable color decimal point indication

  • US 6,281,864 B1
  • Filed: 03/15/1999
  • Issued: 08/28/2001
  • Est. Priority Date: 01/15/1986
  • Status: Expired due to Fees
First Claim
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1. A display system comprising:

  • a plurality of adjacent variable color digital display elements, each said display element including a plurality of display segments and a decimal point segment for selectively exhibiting a plurality of strings of digits with a decimal point, each said display element including a color control input for illuminating it in a color in accordance with a color control signal, the color control inputs of all said display elements being interconnected;

    decoder means having a plurality of inputs for receiving input codes defining a string of digits with or without a decimal point, a plurality of decoder outputs for developing drive signals for selectively energizing said display segments, and a plurality of decimal point outputs for developing drive signals for energizing a certain of said decimal point segments, if the decimal point is present in said string of digits;

    means responsive to said decoder outputs and to said decimal point outputs for exhibiting on said display means the string of digits which may include a decimal point;

    means for interrogating said decimal point outputs to determine whether there is a decimal point in the string of digits and for developing an output signal accordingly; and

    color control means for coupling said output signal to the interconnected color control inputs for illuminating all digits in the string in a first color when said decimal point was detected, and in a second color when said decimal point was not detected.

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