Browse Prior Art Database

USER SELECTABLE, COMBINATION WITH RTC PRE-USER-PROGRAMMABLE AUTOMATIC LCD LIGHTING SYSTEM

IP.com Disclosure Number: IPCOM000006023D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-27
Document File: 2 page(s) / 66K

Publishing Venue

Motorola

Related People

Jeff King: AUTHOR [+2]

Abstract

The ongoing issue of supplying the pager user with an automatic backlighting feature is paramount. When ambient lighting conditions are not adequate for typical LCD reflective reading conditions the user is forced to activate the lighting option. This of course requires additional steps by the user as wall as a vary keen feeling of exactly where the lighting control actually is, since there may be no ambient lighting at all. The bottom line is: Why should the user be required to activate the lighting during known times of darkness? One method of acwmplishing this task is to preset the lighting option using the on board RTC (REAL TIME CLOCK). In short, the RTC is preprogrammed to turn the light on during certain hours when the lighting conditions are likely to be marginal, in other words, at night.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 65% of the total text.

Page 1 of 2

m

MOlBROLA Technical Developments October 1990

USER SELECTABLE, COMBINATION WITH RTC PRE-USER-PROGRAMMABLE

AUTOMATIC LCD LIGHTING SYSTEM

by Jeff King and Silvia Vitari

   The ongoing issue of supplying the pager user with an automatic backlighting feature is paramount. When ambient lighting conditions are not adequate for typical LCD reflective reading conditions the user is forced to activate the lighting option. This of course requires additional steps by the user as wall as a vary keen feeling of exactly where the lighting control actually is, since there may be no ambient lighting at all. The bottom line is: Why should the user be required to activate the lighting during known times of darkness?

   One method of acwmplishing this task is to preset the lighting option using the on board RTC (REAL TIME CLOCK). In short, the RTC is preprogrammed to turn the light on during certain hours when the lighting conditions are likely to be marginal, in other words, at night.

   The system works as follows: First, RTC lighting option is preset by the individual user to determine when the lighting will be required. Secondly, the page is received and stored. Next, on the flow chart, the MicroP detects if the read button is depressed or not? If yes, the question is asked, is the auto backlight option "ON"? Does the RTC compare to the programmed option? If "YES", then the backlighting is turned on for a predetermined amount time. If "NO", then the option is not altered. In other word...