User input apparatus, system, method and computer program for use with a screen having a translucent surface
First Claim
Patent Images
1. An information input apparatus comprising:
- a translucent screen;
an image capture device located for imaging a first side of the screen opposite a second side where user interaction occurs; and
an image processor coupled to the output of the image capture device to determine at least one of where and when a person touches an area on the second side of the screen by a change in intensity of light emanating from the touched area relative to a surrounding area.
1 Assignment
0 Petitions
Accused Products
Abstract
A user interface input apparatus and method allows the detection of when and where a user touches a surface of a translucent screen by the processing of imagery generated by a camera that views an opposite surface of the screen. An input device and system includes a translucent screen; an image capture device located for imaging a first side of the screen opposite a second side where user interaction occurs; and an image processor coupled to the output of the image capture device to determine at least one of where and when a person touches an area on the second side of the screen by a change in intensity of light emanating from the touched area relative to a surrounding area.
67 Citations
35 Claims
-
1. An information input apparatus comprising:
-
a translucent screen;
an image capture device located for imaging a first side of the screen opposite a second side where user interaction occurs; and
an image processor coupled to the output of the image capture device to determine at least one of where and when a person touches an area on the second side of the screen by a change in intensity of light emanating from the touched area relative to a surrounding area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method to detect a user input, comprising providing a system having a translucent screen having an image capture device located for imaging a first side of the screen opposite a second side where user interaction occurs;
- the method determining at least one of where and when a person touches an area on the second side of the screen by detecting a change in intensity of light emanating from the touched area relative to a surrounding area.
- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
22. A signal bearing medium tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform operations to detect a user input, the operations comprising, in response to providing a system having a translucent screen having an image capture device located for imaging a first side of the screen opposite a second side where user interaction occurs:
- determining at least one of where and when a person touches an area on the second side of the screen by detecting a change in intensity of light emanating from the touched area relative to a surrounding area.
- View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
33. A touch screen system comprising:
-
a translucent screen;
an image capture device located for imaging a first side of the screen opposite a second side whereon a user touches the screen;
at least one light source disposed for illuminating the first side of the screen and providing an illumination differential between the first side and the second side; and
an image processor coupled to the output of the image capture device to determine at least one of where and when the user touches an area on the second side of the screen by a change in intensity of light emanating from the touched area relative to a surrounding area, where when incident light on the second side of the screen is brighter than incident light on the first side of the screen, an image of the point of contact with the screen is silhouetted and appears darker than the surrounding area, while when incident light on the first side of the screen is brighter than incident light on the second side of the screen, an image of the point of contact with the screen is highlighted and appears brighter than the surrounding area. - View Dependent Claims (34, 35)
-
Specification