Display device
First Claim
1. 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 comprising:
- an object location detection system, said object location detection system comprising;
a light source of non-visible light to project a non-visible light distribution for detecting the location of an object;
wherein said non-visible light distribution is a substantially laminar light distribution projected above said touch sensitive displayed image;
a multi-pixel sensor system to remotely detect location of touch of an area of said surface within or adjacent to said displayed image by detecting light from said non-visible distribution, and having an output to provide a detected touch location signal; and
a presence detection system, said presence detection system comprising;
a presence sensor to sense the non-visible light distribution and provide a presence sensor signal;
wherein said presence sensor has fewer pixels than said multi-pixel sensor system; and
a processor to process said presence sensor signal and determine a detected presence signal;
wherein said touch sensitive image display device is controlled responsive to said detected touch location signal and to said detected presence signal; and
wherein said presence detection system detects when said object is hovering proximate to but not within said non-visible light distribution.
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Accused Products
Abstract
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 comprising: a first light source to project a first light distribution; a second light source to project a second light distribution; a touch sensor system to remotely detect touch of an area of said surface within or adjacent to said displayed image by detecting change of said first light distribution, and having an output to provide a detected touch signal; a presence sensor system to remotely detect presence of an object at least partially within said second light distribution by detecting change of said second light distribution, and having an output to provide a detected presence signal; a controller configured to control said device responsive to said detected touch signal and further configured to control said device responsive to said detected presence signal.
18 Citations
18 Claims
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1. 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 comprising:
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an object location detection system, said object location detection system comprising; a light source of non-visible light to project a non-visible light distribution for detecting the location of an object;
wherein said non-visible light distribution is a substantially laminar light distribution projected above said touch sensitive displayed image;a multi-pixel sensor system to remotely detect location of touch of an area of said surface within or adjacent to said displayed image by detecting light from said non-visible distribution, and having an output to provide a detected touch location signal; and a presence detection system, said presence detection system comprising; a presence sensor to sense the non-visible light distribution and provide a presence sensor signal;
wherein said presence sensor has fewer pixels than said multi-pixel sensor system; anda processor to process said presence sensor signal and determine a detected presence signal; wherein said touch sensitive image display device is controlled responsive to said detected touch location signal and to said detected presence signal; and wherein said presence detection system detects when said object is hovering proximate to but not within said non-visible light distribution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification