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Portable lighting devices

  • US 8,134,300 B2
  • Filed: 08/08/2008
  • Issued: 03/13/2012
  • Est. Priority Date: 08/08/2008
  • Status: Active Grant
First Claim
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1. A flashlight comprising:

  • a main power source;

    a user interface having an off position, a momentary position, and a latch position;

    a microcontroller including a plurality of bidirectional input/output ports having an internal memory;

    a plurality of temporary mode memory devices not resident in the microcontroller, the plurality of temporary mode memory devices being coupled to the plurality of bidirectional input/output ports of the microcontroller, wherein when the user interface remains in the latch position for a period of time, the microcontroller reads the previous mode information from the internal memory, increments the mode value by one to obtain a current mode information, and writes the current mode information into the mode memory devices.

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