Touch panel controller, integrated circuit, touch panel device, and electronic device
First Claim
Patent Images
1. A touch panel controller, comprising:
- a capacitance driving unit which causes a linear sum signal based on charges, which are accumulated in a plurality of electrostatic capacitances arranged in a corresponding row, to be output from at least one sense line of a touch panel including a plurality of drive lines in which respective columns of a plurality of electrostatic capacitances arranged in a matrix manner are arranged and a plurality of sense lines in which respective rows of the plurality of electrostatic capacitances are arranged, by driving the plurality of drive lines in parallel;
a driving signal generation unit which outputs each of a plurality of driving signals for driving the plurality of drive lines in parallel to the capacitance driving unit by using code sequences, wherein the code sequences include high-correlation code sequences and low-correlation code sequences; and
a correlation control unit which performs control to switch between high-correlation code sequences and low-correlation code sequences according to a detection distance which is a distance between a surface of the touch panel and an object to be detected.
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Abstract
Provided is a driving control unit (93) which performs control to switch high and low of correlation of code sequences output by driving signal generation units (4a to 4d) according to a detection distance which is a distance between a surface of a touch panel (2) and an object to be detected.
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Citations
10 Claims
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1. A touch panel controller, comprising:
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a capacitance driving unit which causes a linear sum signal based on charges, which are accumulated in a plurality of electrostatic capacitances arranged in a corresponding row, to be output from at least one sense line of a touch panel including a plurality of drive lines in which respective columns of a plurality of electrostatic capacitances arranged in a matrix manner are arranged and a plurality of sense lines in which respective rows of the plurality of electrostatic capacitances are arranged, by driving the plurality of drive lines in parallel; a driving signal generation unit which outputs each of a plurality of driving signals for driving the plurality of drive lines in parallel to the capacitance driving unit by using code sequences, wherein the code sequences include high-correlation code sequences and low-correlation code sequences; and a correlation control unit which performs control to switch between high-correlation code sequences and low-correlation code sequences according to a detection distance which is a distance between a surface of the touch panel and an object to be detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification