Touch sensitive image display

摘要

We describe a touch sensitive image display device for projecting a touch sensitive displayed image at an acute angle onto a surface on which the device is placed. The device comprises: light sources to project two-dimensional first and second light distributions in respective first and second planes; and a multi-pixel sensor system to remotely detect touch of an area of said surface within or adjacent to the displayed image by detecting light from the first distribution to provide a detected touch signal. The multi-pixel sensor system also remotely detects presence of an object within the second light distribution to provide a detected presence signal. The device is configured to multiplex projection of the first light and second distributions. A controller has an input to receive the detected touch and detected presence signals and is configured to control the device responsive to these signals.

主权项

1. A touch sensitive image display device for projecting a touch sensitive displayed image at an acute angle onto a display surface, the device comprising:
a first non-visible light source to project a substantially two-dimensional first light distribution in a first plane; a second non-visible light source to project a substantially two-dimensional second light distribution in a second plane, wherein said second plane is different to said first plane; wherein said first and second planes are each above said display surface, and substantially parallel and non-intersecting; a multi-pixel sensor system to remotely detect touch of an area of said surface within or adjacent to said displayed image by detecting light from said first distribution, and having an output to provide a first object detection signal; said multi-pixel sensor system to remotely detect presence of an object at least partially within said second light distribution by detecting light from said second distribution, and having an output to provide a second object detection signal; and a controller having an input to receive said first object detection signal and an input to receive said second object detection signal and configured to control said touch sensitive image display device responsive to said signals, wherein said device is configured to multiplex projection of the first light distribution and projection of the second light distribution in said respective first and second planes.