Wand turn-on control
First Claim
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1. A control circuit for conserving power in a battery powered system comprising:
- a sensing means for determining when the system is placed into use and for generating pulses indicative of said use, a clock circuit for generating clock pulses, a counting circuit for counting pulses generated by said sensing means and clock and for generating a signal when said counting circuit counts to a predetermined state, and a power control circuit responsive to said generated signal for controling power to said system when said system is placed into use.
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Accused Products
Abstract
Disclosed is a control circuit used to conserve power in a portable optical recognition system. When the system is not being used or between actual scans of the reading electronics, power is supplied only to those circuits required to control power to the system and to permit sequence reading of items. An infrared signal is emitted from the reading device and when a document or other item to be read is scanned the infrared signal is reflected back into the scan unit and is detected, thereby sensing that a document is being read and turning the system on.
137 Citations
11 Claims
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1. A control circuit for conserving power in a battery powered system comprising:
- a sensing means for determining when the system is placed into use and for generating pulses indicative of said use, a clock circuit for generating clock pulses, a counting circuit for counting pulses generated by said sensing means and clock and for generating a signal when said counting circuit counts to a predetermined state, and a power control circuit responsive to said generated signal for controling power to said system when said system is placed into use.
- View Dependent Claims (2, 3, 4, 5, 6)
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7. A control circuit for conserving power in a battery powered system comprising:
- a source of pulsed radiated energy, a detector for receiving reflected pulses of said radiated energy, a clock circuit for producing pulses, a first counting circuit for receiving and counting clock pulses, a second counting circuit for receiving and counting said received reflected pulses, said first and second counting circuits each programmed to count down from a different predetermined number, a reset circuit for resetting both said counters when said first counter counts down before said second counter counts down, and a power control circuit triggered by said second count circuit when said second counting circuit counts down before said first counting circuit.
- View Dependent Claims (8, 9, 10)
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11. An optical character recogniton wand in combination with a power control circuit comprising;
- an optical character recognition wand for reading information, a transmitting device located in said wand for sending signals, a receiving device in said wand for receiving reflections of said signals when the wand is placed adjacent an item from which information is to be read, and a control circuit connected to said receiving device for supplying power to said wand when the wand is placed adjacent an item from which information is to be read.
Specification