Projection display system with pressure sensing at screen, and computer assisted alignment implemented by applying pressure at displayed calibration marks
AssigneeSmart Technologies Inc.
InventorDavid A. Martin
Life of this patent
Estimating the term…
Abstract
An interactive display system comprising a touch sensitive display surface for sensing pressure applied thereto and in response generating control signals indicating locations of the applied pressure, a personal computer for receiving the control signals and in response generating graph images, and an LCD panel in combination with an overhead projector for receiving and projecting the graphic images onto the touch sensitive display surface at the indicated locations. The LCD panel and overhead projector may be provided an an integral unit.
Claims15
An interactive display system, comprising:
- a) one or more touch-sensitive display surfaces for detecting predetermined events associated therewith and in response generating control signals for identifying said events and indicating locations thereof,
- b) one or more computers for selectively executing one or more applications programs and in response generating screen video displays, said one or more computers being connected to respective ones of said touch-sensitive display surfaces,
- c) driver means in each said one or more computers for receiving said control signals from an associated one of said touch-sensitive display surfaces and in response generating a command to a selected one of said applications programs for identifying an associated one of said computers and for identifying said events and indicating the locations thereof, whereby said selected applications program executes said command and updates said screen video displays in accordance therewith, and
- d) projector means connected to said one or more computers for receiving and projecting said screen video displays onto said one or more touch-sensitive display surfaces,
An interactive display system, comprising:
- a) a touch-sensitive display screen for sensing pressure applied thereto and in response generating control signals indicating locations of said applied pressure, and
- b) means for receiving said control signals and in response generating and projecting graphic images onto said touch sensitive display screen at said locations.
The interactive display system of claim 12, wherein said means for modifying comprises a software routine for generating via said projector means a plurality of alignment images onto said display screen at predetermined locations, detecting user applied pressure on said display screen at the respective locations of said images, and in response calibrating said horizontal and vertical coordinates to compensate for misalignment between said projector means and said display screen.
Dependencies are inferred from the claim text.