Capacitive sensing on large touch screens
First Claim
1. An input device comprising:
- a first plurality of sensor electrodes comprising first transmitter electrodes and first receiver electrodes;
a second plurality of sensor electrodes comprising second transmitter electrodes and second receiver electrodes; and
a processing system comprising;
a first integrated circuit coupled to said first plurality of sensor electrodes and configured to transmit a first transmitter signal with at least one of said first transmitter electrodes and to receive first resulting signals with said first receiver electrodes, wherein said first resulting signals comprise effects corresponding to said first transmitter signal;
a second integrated circuit coupled to said second plurality of sensor electrodes and configured to transmit a second transmitter signal with at least one of said second transmitter electrodes and to receive second resulting signals with said second receiver electrodes, wherein said second resulting signals comprise effects corresponding to said second transmitter signal; and
a central controller communicatively coupled to said first integrated circuit and said second integrated circuit,wherein said central controller is configured to transmit a clock signal to said first integrated circuit and said second integrated circuit,wherein said clock signal is configured to synchronize transmission of said first transmitter signal and said second transmitter signal at a predetermined frequency, andwherein said central controller is configured to receive said first resulting signals from said first integrated circuit and said second resulting signals from said second integrated circuit and is configured to determine positional information from said first resulting signals and said second resulting signals and to communicate said positional information to a host processor.
2 Assignments
0 Petitions
Accused Products
Abstract
An input device comprises a first plurality of sensor electrodes, a second plurality of sensor electrodes, and a processing system. The processing system comprises a first integrated circuit, a second integrated circuit, and a central controller. The first integrated circuit is coupled to the first plurality of sensor electrodes and configured to receive first resulting signals therewith. The second integrated circuit is coupled to the second plurality of sensor electrodes and configured to receive second resulting signals therewith. The central controller is communicatively coupled to the first and second integrated circuits. The central controller is configured to receive the first resulting signals from the first integrated circuit and the second resulting signals from the second integrated circuit and is configured to determine positional information from the first resulting signals and the second resulting signals and to communicate the positional information to a host processor.
109 Citations
17 Claims
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1. An input device comprising:
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a first plurality of sensor electrodes comprising first transmitter electrodes and first receiver electrodes; a second plurality of sensor electrodes comprising second transmitter electrodes and second receiver electrodes; and a processing system comprising; a first integrated circuit coupled to said first plurality of sensor electrodes and configured to transmit a first transmitter signal with at least one of said first transmitter electrodes and to receive first resulting signals with said first receiver electrodes, wherein said first resulting signals comprise effects corresponding to said first transmitter signal; a second integrated circuit coupled to said second plurality of sensor electrodes and configured to transmit a second transmitter signal with at least one of said second transmitter electrodes and to receive second resulting signals with said second receiver electrodes, wherein said second resulting signals comprise effects corresponding to said second transmitter signal; and a central controller communicatively coupled to said first integrated circuit and said second integrated circuit, wherein said central controller is configured to transmit a clock signal to said first integrated circuit and said second integrated circuit, wherein said clock signal is configured to synchronize transmission of said first transmitter signal and said second transmitter signal at a predetermined frequency, and wherein said central controller is configured to receive said first resulting signals from said first integrated circuit and said second resulting signals from said second integrated circuit and is configured to determine positional information from said first resulting signals and said second resulting signals and to communicate said positional information to a host processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A processing system for a capacitive sensing device comprising:
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a first integrated circuit configured to couple to a first plurality of sensor electrodes, said first plurality of sensor electrodes comprising first transmitter electrodes and first receiver electrodes, said first integrated circuit further configured to transmit a first transmitter signal to at least one of said first transmitter electrodes and to receive first resulting signals from said first receiver electrodes, wherein said first resulting signals comprise effects corresponding to said first transmitter signal; a second integrated circuit configured to couple to a second plurality of sensor electrodes, said second plurality of sensor electrodes comprising second transmitter electrodes and second receiver electrodes, said second integrated circuit further configured to transmit a second transmitter signal to at least one of said second transmitter electrodes and to receive second resulting signals from said second receiver electrodes, wherein said second resulting signals comprise effects corresponding to said second transmitter signal; and a central controller communicatively coupled to said first integrated circuit and said second integrated circuit, wherein said central controller is configured to transmit a clock signal to said first integrated circuit and said second integrated circuit, wherein said clock signal is configured to synchronize transmission of said first transmitter signal and said second transmitter signal at a predetermined frequency, and wherein said central controller is configured to receive said first resulting signals from said first integrated circuit and said second resulting signals from said second integrated circuit and is configured to determine positional information from said first resulting signals and said second resulting signals and to communicate said positional information to a host processor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification