Browse Prior Art Database

Wireless Pointing Device

IP.com Disclosure Number: IPCOM000105123D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Aihara, T: AUTHOR [+3]

Abstract

Disclosed is a device for a remote screen-pointing system. It uses a narrow beam of light to point to a position on a PC screen. This position is determined by detecting the beam at the surface of the screen. The device also uses a wide beam of light, to transmit a user's action. The information on the position and the action are sent to the PC. This mechanism enables users to operate PCs at a distance by pointing to and selecting function buttons displayed on the PC screen, and is useful for presentation applications.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Wireless Pointing Device

      Disclosed is a device for a remote screen-pointing system.  It
uses a narrow beam of light to point to a position on a PC screen.
This position is determined by detecting the beam at the surface of
the screen.  The device also uses a wide beam of light, to transmit a
user's action.  The information on the position and the action are
sent to the PC.  This mechanism enables users to operate PCs at a
distance by pointing to and selecting function buttons displayed on
the PC screen, and is useful for presentation applications.

      The Fig. shows an example of a configuration of this device.
This device consists of a remote controller, a scattering plate, a
pointing beam detector, and an action beam detector.

Remote controller - The remote controller has a power switch and an
action button.  The pointing beam, a narrow beam of light, is emitted
while the power switch is on.  The user is able to point to a desired
position on the PC screen by adjusting the direction of the pointing
beam.  The PC displays a cursor that shows the position of the
pointing spot so that the user can recognize the direction of the
beam.  The action beam, a wide beam of light, is emitted when the
action button is pressed.  The action beam is a kind of trigger for
execution of a command.  The intensities of these beams are modulated
by 50 kHz and 100 kHz, respectively, so that they can be
distinguished from ambient lights.

Scattering plate - A scattering plate overlaid on the PC screen is
transparent enough for the user to see the PC screen through it.  It
scatters the pointing beam...