Browse Prior Art Database

MULTIPLE DISPOSABLE DISPLAY LENSES

IP.com Disclosure Number: IPCOM000006107D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-04
Document File: 2 page(s) / 100K

Publishing Venue

Motorola

Related People

Brad Murray: AUTHOR

Abstract

When using an information display device such as a pager in a harsh environment, the information that is displayed can become unreadable from an accumulation of debris from the surrounding environment on the display surface (i.e., paint, dust, soot, etc.). Permanent damage to the display surface (lens) can occur when an attempt is made to remove the foreign material from the display surface (i.e., scratches, discoloration, etc.). In such cases, the lens would have to be replaced. Optional carrying cases have been designed for such display devices that allow the user to view the display while protecting the display surface from the environment. This, however, merely diverts the damage from the display device to the carrying case causing replacement of the case to become necessary.

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MOTOROLA INC. Technical Developments Volume 12

April 1991

MULTIPLE DISPOSABLE DISPLAY LENSES

by Brad Murray

  When using an information display device such as a pager in a harsh environment, the information that is displayed can become unreadable from an accumulation of debris from the surrounding environment on the display surface (i.e., paint, dust, soot, etc.). Permanent damage to the display surface (lens) can occur when an attempt is made to remove the foreign material from the display surface (i.e., scratches, discoloration, etc.). In such cases, the lens would have to be replaced. Optional carrying cases have been designed for such display devices that allow the user to view the display while protecting the display surface from the environment. This, however, merely diverts the damage from the display device to the carrying case causing replacement of the case to become necessary.

To solve these problems, multiple layers of a thin, flexible, transparent material are positioned over the

display to protect the display surface so that when foreign material accumulates or damage occurs to a protective layer, that layer can be removed by the user. Figure 1 depicts a cross-sectional side view of the display portion of a display device showing the use of the multiple layers of protective lenses. An integral cavity is positioned above a liquid crystal display (LCD) which houses the protective lenses. A lens door is used to gain access to the protective lenses. The s...