Browse Prior Art Database

VARIABLE RATE FLASHING OF SILENT ELECTROLUMINESCENT ALERT

IP.com Disclosure Number: IPCOM000005880D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-13
Document File: 1 page(s) / 52K

Publishing Venue

Motorola

Related People

Dan Larson: AUTHOR

Abstract

This invention will allow the user to distinguish between different types of pages based on the flash rate of the elec- troluminescent (EL) alert. A certain rate of flash may be reserved for a particular caller or for a high priority situation.

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MOTOROLA Technical Developments Volume 10 March 1990

VARIABLE RATE FLASHING OF SILENT ELECTROLUMINESCENT ALERT

by Dan Larson

This invention will allow the user to distinguish between different types of pages based on the flash rate of the elec- troluminescent (EL) alert. A certain rate of flash may be reserved for a particular caller or for a high priority situation.

   Upon alert, the EL backlighting (or other backlight source) of the LCD will flash "on", "off", "on", "off" etc. for a predetermined time and interval rate. The flashing rate can be made different for different pager code numbers. These special "priority" or "personal" numbers can be a codeplug option. When paged with these numbers, the pager will flash at the special rate, identifying the special nature of the page.

   An alternate use of the special flashing rate may be as an unread message indicator when in the silent mode. For example, the first reminder flashes may be at one flesh rate, whereas the second, third, etc. reminders could be at increasingly faster flash rates indicating the age of the unread message.

   This feature can be made "fail-safe" by using it in conjunction with a photo-sensor. For example, if the ambient light is sufficiently low enough to make the "EC' alert visible to the eye, the silent "EC' alert can be activated (if the user has chosen the "silent" mode). If the photo-sensor indicates ambilent light above a certain threshold (which would make the "EC' alert not visible),...