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AUTOMATIC LCD DRIVER CIRCUITRY TURN ON/OFF FOR PAGERS WITH HOLSTERS

IP.com Disclosure Number: IPCOM000006522D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-11
Document File: 1 page(s) / 57K

Publishing Venue

Motorola

Related People

Eugene Lopatukhin: AUTHOR [+2]

Abstract

As paging products reach higher levels of sophisti- cation, battery lie becomes a very important parameter in measuring pager performance. A good idea to reduce current drain is to turn off a pager's LCD driver cir- cuitry when the user is not using it. One example would be sidemount display pagers that are carried in holsters. When the pager is worn it is impossible for the display to be read and there is no reason for it to be on. But if a page is received the LCD is turned on automatically when the user pulls the pager out of the holster and the alert can be turned off automatically. This will add to the battery savings.

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MOTOR0l.A INC. Technical Developments Volume 16 August 1992

AUTOMATIC LCD DRIVER CIRCUITRY TURN ON/OFF FOR PAGERS WITH HOLSTERS

by Eugene Lopatukhin and Osvaldo Romero

  As paging products reach higher levels of sophisti- cation, battery lie becomes a very important parameter in measuring pager performance. A good idea to reduce current drain is to turn off a pager's LCD driver cir- cuitry when the user is not using it. One example would be sidemount display pagers that are carried in holsters. When the pager is worn it is impossible for the display to be read and there is no reason for it to be on. But if a page is received the LCD is turned on automatically when the user pulls the pager out of the holster and the alert can be turned off automatically. This will add to the battery savings.

  In order to determine whether the pager is in the holster or not, a sensor of some type is placed inside the pager and in the holster. When the pager is in the hol- ster, the sensor detects this and shuts off the display and when the pager is removed the sensor detects the removal and turns on the display and possibly stops the alert.

Also, if the user removes both the pager and its holster at the same time the sensor will also turn on the LCD automatically because sensor contacts are also placed in the belt clip of the holster. In this case the user might read the pager one last time before taking the pager and holster off for the day. The display will then torn off alter a...