Method and device for recognizing a dual point user input on a touch based user input device
First Claim
1. A method for recognizing a dual point user input on a touch based user input device, comprising forming a first position signal related to a first user input to said input device, forming a second position signal related to a subsequent second user input to said input device, and determining if said second position signal has its source in a simultaneous dual point user input.
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Accused Products
Abstract
A dual point user input is recognized on a touch based user input device that is only capable of outputting a single input position signal by forming or detecting a first position signal, preferably storing the position signal, forming or detecting a subsequent second position signal and determining if the second position has its source in a simultaneous dual point user input.
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Citations
27 Claims
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1. A method for recognizing a dual point user input on a touch based user input device, comprising
forming a first position signal related to a first user input to said input device, forming a second position signal related to a subsequent second user input to said input device, and determining if said second position signal has its source in a simultaneous dual point user input.
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24. A touch based input device controller for a touch based user input device, wherein said input device is only capable of outputting a single input position signal that depends on the actual user input, comprising,
an input connectable to said touch based user input device to receive successive position signals each representing a position on said touch based user input device, which a user has touched, a memory, connected to said input, to store at least one of said position signals, a differentiator to detect time dependent transition properties between two different successive positions, a first evaluation circuit connected to said differentiator to determine, if a position following a preceding position is caused by a single point user input or by a dual point user input, a second evaluation circuit, connected to said input, said memory and said first evaluation circuit, wherein said second evaluation circuit is generate a dual point on basis of said successive positions, and an output, connected to said second evaluation unit, connectable to a processing unit.
Specification