Browse Prior Art Database

EVENT-DRIVEN BACKLIGHT ACTIVATION

IP.com Disclosure Number: IPCOM000007394D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2002-Mar-21
Document File: 1 page(s) / 55K

Publishing Venue

Motorola

Related People

Charles P. Schultz: AUTHOR

Abstract

When a portable radio is used at night, its LCD display is difficult to view without backlighting. Radios presently have a means of activating the backlight when a dedicated backlight button is hit, or when any user input occurs. This gives the viewer a means to view the display while initiating an oper- ation, but it does not address instances when other radio events require the user's attention.

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MO7DROL.A Technical Developments Volume 24 March 1995

EVENFDRIVEN BACKLIGHT ACTIVATION

by Charles I? Schultz

  When a portable radio is used at night, its LCD display is difficult to view without backlighting. Radios presently have a means of activating the backlight when a dedicated backlight button is hit, or when any user input occurs. This gives the viewer a means to view the display while initiating an oper- ation, but it does not address instances when other radio events require the user's attention.

  This invention causes the backlight to come on when any event occurs that requires the user's atten- tion. One advantage of this "smart light" operation is that it eliminates the need for a dedicated backlight activation button on radios with limited space, such as a credit card-style radio. This operation may be used in conjunction with a photocell or time-of-day (internal or over-the-air) information to determine whether it is necessary to activate the backlight, resulting in increased battery and backlight life.

  Each time the radio would normally indicate over-the-air, internal, or external events, the backlight would come on if programmed to do so and if the photocell/time-of-day indicates backlighting is required. Some examples of these events are listed below:

Individual Call Received Phone Call Received Dynamic TG Assigned/Canceled Locked on Priority Scan Channel Failsoh

Out Of Range System Reject

INTERNAL EVENTS

Low Battery Synthesizer Out OfLock Run-...