Optical touch screen arrangement
First Claim
Patent Images
1. An optical touch screen arrangement, comprising:
- a) a housing;
b) a display screen mounted on the housing and operative for displaying visual prompts to solicit action from a user;
c) a pair of linear optical imagers on the housing and having respective, generally planar fields of view adjacent the display screen and intersecting each other to bound a touch area occupying a major fraction of area overlying the display screen, a minor fraction of the area overlying the display screen being located in the field of view of only one of the imagers, the imagers having respective rows of light sensors for detecting an entry into the touch area and for generating electrical position signals, one of the prompts being a contact area in which only one touch is optically captured by the one imager; and
d) a signal processor for processing the position signals to determine a location of the entry in the touch area.
4 Assignments
0 Petitions
Accused Products
Abstract
An optical touch screen arrangement includes two optical cameras arranged so that their planar fields of view intersect each other in a touch area situated adjacent a display screen operative for displaying visual prompts to solicit action from a user. The user'"'"'s finger, or a pen, entering the touch area is detected, as is the user'"'"'s signature.
43 Citations
12 Claims
-
1. An optical touch screen arrangement, comprising:
-
a) a housing; b) a display screen mounted on the housing and operative for displaying visual prompts to solicit action from a user; c) a pair of linear optical imagers on the housing and having respective, generally planar fields of view adjacent the display screen and intersecting each other to bound a touch area occupying a major fraction of area overlying the display screen, a minor fraction of the area overlying the display screen being located in the field of view of only one of the imagers, the imagers having respective rows of light sensors for detecting an entry into the touch area and for generating electrical position signals, one of the prompts being a contact area in which only one touch is optically captured by the one imager; and d) a signal processor for processing the position signals to determine a location of the entry in the touch area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification