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Lamp control circuit

  • US 6,160,355 A
  • Filed: 06/12/1998
  • Issued: 12/12/2000
  • Est. Priority Date: 06/12/1998
  • Status: Expired due to Fees
First Claim
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1. A lamp control circuit for use in a flashlight, the flashlight including at least one battery for use as a power supply, a light bulb, and a light emitting diode (LED), the lamp control circuit comprising:

  • oscillator means coupled to the light bulb and the LED;

    voltage indicator means coupled to the battery for indicating to a user when the voltage level of the battery falls below a first pre-determined level;

    dimmer means comprising a 2 to 1 multiplexer coupled to voltage regulator means coupled between the battery and a bulb for reducing the amount of electrical current supplied to the light bulb; and

    activation means coupled between said voltage indicator means and the LED, wherein said activation means supplies electrical power to the LED when a voltage level of the battery has fallen below a second pre-determined level.

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