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Light-emitting diode display apparatus with low electromagnetic display

  • US 20040090403A1
  • Filed: 11/08/2002
  • Published: 05/13/2004
  • Est. Priority Date: 11/08/2002
  • Status: Abandoned Application
First Claim
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1. Alight-emitting diode display apparatus comprising:

  • a diode string including a plurality of light-emitting diodes connected in series;

    a plurality of switch components, each of which is connected across a respective one of said light-emitting diodes and is independently controllable so as to operate in a selected one of an opened state, where said switch component permits current flow through the respective one of said light-emitting diodes, and a closed state, where said switch component prevents current flow through the respective one of said light-emitting diodes;

    a voltage source coupled to said diode string and operable so as to provide a working voltage to said diode string; and

    a current source coupled to said diode string and operable so as to ensure flow of a constant current through assembly of said diode string and said switch components.

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