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Battery level indicator supplying data from a memory to a display in a power-off state

  • US 4,800,336 A
  • Filed: 05/18/1987
  • Issued: 01/24/1989
  • Est. Priority Date: 05/21/1986
  • Status: Expired due to Term
First Claim
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1. A battery level indicator for use with an electronic apparatus comprising:

  • (a) voltage detection means for detecting the application of power to said electronic apparatus from a battery, for producing an output signal in response to such application of power.(b) sampling means connected to said electronic apparatus for sampling the value of voltage applied thereto from said battery.(c) memory means connected to said sampling means for storing data corresponding to the voltage level applied to said electronic apparatus,(d) an indicator for displaying data, and(e) data supplying means connected to and responsive to said voltage detecting means for supplying real time voltage data from said sampling means to said indicator while said battery is applying power to said electronic apparatus, and for supplying voltage data from said memory means to said indicator when said battery is not applying power to said electronic apparatus.

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