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Temperature control device with automatically adjustable backlighting

  • US 10,133,337 B2
  • Filed: 05/26/2016
  • Issued: 11/20/2018
  • Est. Priority Date: 05/26/2015
  • Status: Active Grant
First Claim
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1. A temperature control device comprising:

  • a temperature sensing circuit configured to generate a temperature control signal indicating a temperature in a space around the temperature control device;

    at least one internal electrical load configured to generate heat when energized; and

    a control circuit configured to;

    receive the temperature control signal;

    control the internal electrical load;

    be in an idle state or an awake state; and

    receive a set point temperature;

    wherein, when the control circuit is in the idle state, the control circuit is configured to;

    cause the internal electrical load to consume less power as compared to when the control circuit is in the awake state;

    sample the temperature control signal;

    determine a sampled temperature based on the temperature control signal; and

    store the sampled temperature in memory; and

    wherein, when the control circuit is in the awake state, the control circuit is configured to;

    energize the internal electrical load;

    cease sampling the temperature control signal;

    use the sampled temperature stored in the memory in the idle state as a present temperature;

    compare the present temperature to the set point temperature; and

    based on comparing the present temperature to the set point temperature, control an HVAC system.

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