Touch panel display system
First Claim
1. A touch panel display screen comprising:
- a display screen for displaying information;
a plurality of emitters positioned in proximity to the display screen, each of the emitters adapted for emitting energy beams that are diverged across a surface of the display screen; and
at least one detector positioned in proximity to the display screen and adapted to receive the energy beams over a range of angles.
2 Assignments
0 Petitions
Accused Products
Abstract
Emitters and detectors are positioned in proximity to a display screen. Emitters emit energy beams that are diverged across the surface of the display screen. Emitters may be activated/deactivated in sequence, rapid enough to substantially ensure that several energy beams are interrupted by a touch of the display screen. Detectors receive energy beams over a range of angles and generate detection signals upon detecting energy beams. Detection maps are generated based on detection signals. Detection maps indicate which detector should receive an energy beam from which emitter at any point in time. Detections maps are compared to determine that energy beams have been interrupted by a touch. Based on the interrupted energy beams, the location of the touch on the display screen may be determined. The invention serves to reduce the number of emitters and detectors required in a touch panel display system and/or increase the sensitivity and accuracy thereof.
216 Citations
38 Claims
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1. A touch panel display screen comprising:
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a display screen for displaying information;
a plurality of emitters positioned in proximity to the display screen, each of the emitters adapted for emitting energy beams that are diverged across a surface of the display screen; and
at least one detector positioned in proximity to the display screen and adapted to receive the energy beams over a range of angles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch panel display system comprising:
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a display screen for displaying information;
a plurality of emitters positioned in proximity to the display screen, each of the emitters adapted for emitting energy beams that are diverged across a surface of the display screen;
a plurality of detectors positioned in proximity to the display screen, each of the detectors adapted to receive the energy beams over a range of angles and to generate detection signals upon detecting any one of the energy beams; and
a processor for executing computer-executable instructions for;
based on an absence of an expected detection signal from at least one of the detectors, determining that at least one of the energy beams has been interrupted by a touch of the display screen, and based on the at least one interrupted energy beam, determining the location of the touch on the display screen. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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19. A method for implementing a touch panel display screen comprising:
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providing a display screen for displaying information;
providing a plurality of emitters positioned in proximity to the display screen, each of the emitters adapted for emitting energy beams that are diverged across a surface of the display screen; and
providing at least one detector positioned in proximity to the display screen and adapted to receive the energy beams over a range of angles and to generate detection signals upon detecting any one of the energy beams.
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33. A method for implementing a touch panel display screen comprising:
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providing a display screen for displaying information;
providing a plurality of emitters positioned in proximity to the display screen in such a manner that the energy beams cover substantially the entire area of a surface of the display screen, each of the emitters adapted for emitting energy beams that are diverged across the surface of the display screen, the emitters being further adapted to be activated and deactivated according to a sequence that is rapid enough to substantially ensure that a plurality of the energy beams will be interrupted by a touch of the display screen, each of the interrupted energy beams being emitted by different ones of the emitters at different times;
providing a plurality of detectors positioned in proximity to the display screen and adapted to receive the energy beams over a range of angles and to generate detection signals upon detecting any one of the energy beams;
generating a plurality of detection maps based on the detection signals generated by the detectors over time, the detection maps indicating from which of the emitters each of the detectors should receive one of the energy beam at any point in time;
comparing a current detection map to a previously stored detection map in order to determine that the plurality of energy beams has been interrupted by the touch of the display screen; and
determining a location of the touch on the display screen based on the interrupted energy beams. - View Dependent Claims (34, 35, 36, 37, 38)
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Specification