Presentation system

Details Presentation system Presentation system

Filed on

2006-04-11

Date issued

2006-04-11

Examiner

Shankar, Vijay (Department: 2673)

Patent Class

Computer graphics processing and selective visual display system

SubClass

Display peripheral interface input device

SubSubClass

Touch panel

Other Related Categories

C345S156000, C345S173000, C345S179000

Type

Reexamination Certificate

Status

active

Patent number

07027041

Description

ABSTRACT:
A presentation system comprises: a screen device; a projecting device for projecting an image onto the screen device; an indication mark for setting two reference points, which is two orthogonal points on a rectangular virtual screen, near a presenter and for the presenter operating a point on the virtual screen; a photographing device for photographing the virtual screen and the indication mark; and an arithmetic operation device for generating coordinates of the virtual screen from the two reference points photographed by the photographing device, and for calculating coordinates of the indication mark on the generated virtual screen. The projecting device projects a point image onto the coordinates of the indication mark on the image.

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patent: A 10-4228 (1998-01-01), None
patent: A 2000-321530 (2000-11-01), None

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