Browse Prior Art Database

Interactive Display Tablet

IP.com Disclosure Number: IPCOM000045699D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Davis, MI: AUTHOR [+4]

Abstract

Workstations for computer graphics applications require a number of I/O devices, which normally include a CRT screen, a keyboard and a tablet. The tablet is used as the electronic writing surface. and the screen displays the graphical picture. It is often desirable, and sometimes necessary, to have a second CRT screen to display system information, while preserving the graphical picture on the main CRT. Frequently, too, overlays are placed on the tablet to define certain areas, for example, as an alpha-numeric keyboard.

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Interactive Display Tablet

Workstations for computer graphics applications require a number of I/O devices, which normally include a CRT screen, a keyboard and a tablet. The tablet is used as the electronic writing surface. and the screen displays the graphical picture. It is often desirable, and sometimes necessary, to have a second CRT screen to display system information, while preserving the graphical picture on the main CRT. Frequently, too, overlays are placed on the tablet to define certain areas, for example, as an alpha-numeric keyboard.

This article concerns a tablet with an interactive backlit display on the tablet surface. The information on the display surface can be changed dynamically by an application program, thus eliminating the need for discrete tablet overlays and a second screen when running host applications. Fig. 1 is an external perspective view of the tablet, and Fig. 2 a schematic cross-section.

The tablet comprises a housing 10 having a 28 cm x 28 cm active tablet area 11 inclined at 20 degrees or less to the horizontal. The active area 11 may be "written" upon with a stylus 12. The active area 11 may be of the capacitative or other conventional kind, although it should be of a transparent or semi- transparent nature to permit visibility of the interactive backlit display, and preferably has an anti-reflection coating.

The interactive backlit display is provided on a 15 cm x 10 cm screen 13 arranged immediately behind the active area 11...