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LED traffic signal compensation and protection methods

  • US 8,717,194 B2
  • Filed: 12/21/2010
  • Issued: 05/06/2014
  • Est. Priority Date: 12/21/2010
  • Status: Active Grant
First Claim
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1. A traffic lamp comprising:

  • one or more light sources;

    one or more temperature sensors that measure an internal ambient temperature of the entire traffic lamp, wherein the temperature sensors are located on or proximately close to a traffic lamp power supply;

    one or more memory modules; and

    a controller internal to the traffic lamp that actively monitors one or more operating parameters of the traffic lamp including operating usage of the traffic lamp during its active power cycle and internal power supply ambient temperature, compares these values to pre-determined thresholds, and enters the traffic lamp into a self-protected mode, wherein the controller changes internal operating parameters and behavior to enable continuous operation of the traffic lamp and to protect itself from damaging abnormal operating conditions, and once abnormal operating conditions are removed, revert the traffic lamp to its normal intended operating parameters and behavior.

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