Systems and methods for high resolution optical touch position systems
First Claim
1. A touch position device comprising:
- at least two opposing arrays of interleaved emitters and detectors, each said array being integrated into a single unit.
5 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, a touch detection system and method is achieved having high resolution by forming an integrated array of alternating emitters and detectors. Using integration techniques, the detectors can be made much larger than the emitters while the gaps between the emitters and detectors are maintained relatively small. Thus, high resolution is achieved without dramatically increasing the number of emitter/detector pairs. In one embodiment each array is positioned on an edge of a display such that the emitter of one array is lined up (on axis with) a detector of an opposing display. In one embodiment, the touch detection system and method operates to detect the amplitude of signals arriving from opposing arrays so as to precisely determine the location of a touched position. Off-axis scanning can be employed to increase sensitivity.
-
Citations
34 Claims
-
1. A touch position device comprising:
at least two opposing arrays of interleaved emitters and detectors, each said array being integrated into a single unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
9. A method for determining a touched position within a bounded area, said method comprising:
-
positioning an integrated array of interleaved emitters and detectors on opposing edges of said bounded area, and detecting by at least one detector on one array a signal sent from at least one emitter on said opposing array. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A touch position sensitive device comprising:
-
a surface bounded by at least two integrated arrays of opposing alternating emitters and detectors; and
means for determining a temporarily touched position with respect to said bounded surface. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A hand held device comprising:
-
a plurality of integrated alternating signal emitters and signal detectors arranged to form arrays, said arrays positioned to define a display area; and
a processor operable from signals emitted from at least one of said signal emitters and by at least one of said detectors for determining the relative position within said display area of a temporary intrusion between at least one signal emitter and at least on signal detector. - View Dependent Claims (24, 25, 26)
-
-
27. An optical touch panel system comprising:
-
a plurality of integrated arrays of interleaved emitters and detectors;
a display area bounded by a plurality of said integrated arrays; and
a processor for enabling the determination of an object'"'"'s position when said object contacts said display area. - View Dependent Claims (28, 29)
-
-
30. A method for determining a touched position within a bounded area, comprising:
-
positioning integrated arrays of interleaved emitters and detectors on opposing edges of said bounded area;
determining change in amplitude of a signal between at least one emitter and its corresponding detector;
performing on-axis sweeping of the bounded area to determine a quadrant in which said signal'"'"'s amplitude is altered;
determining a size of said object altering said amplitude of said signal;
determining a nearest emitter to said altered signal; and
activating said nearest emitter and opposing detectors to determine a relative position of said object.
-
-
31. A device comprising:
an interleaved set of emitters and detectors integrated onto a single substrate, said emitters operable for providing optic signals and said detectors operable for detecting optic signals. - View Dependent Claims (32, 33, 34)
Specification