Abstract: The present disclosure detects capacitance distribution between each of detection electrodes and a detected subject on a touch panel with a simple configuration. A drive sense switch element selected among a plurality of drive sense switch elements (DST) on the basis of a code sequence via control lines turns on, and drive sense lines are driven at a first potential. A difference between linear sum signals based on an electric charge of each of the detection electrodes is then read. Subsequently, a capacitance or a change in capacitance between each of the detection electrodes of a touch panel and a detected subject is detected on the basis of a sum-of-product computation performed on the difference between the linear sum signals and the code sequence.

Abstract: Sense lines in a self-capacitance touch panel are multiplexed. A touch panel controller (3) includes a drive circuit (4) that drives drive lines (D0 through D(K?1)), based on a drive code series, a code multiplication unit (11) that reads multiple linear sum signals along the sense lines (S0 through S(M?1)), based on the charges of detection electrodes (E) and performs an inner product computation with a detection code series, and a detection circuit (6) that detects a capacitance or a change in the capacitance.

Abstract: Capacitance distribution between each of detection electrodes and a stylus pen on a touch panel is detected with a simple configuration. A read step and a detection step are included. In the read step, a switch element selected among a plurality of drive sense switch elements (DST) between detection electrodes (E) and drive sense lines (DS) aligned in an X-axis direction based on a code sequence via control lines (DSS) aligned in a Y-axis direction is made to turn on, and a linear sum signal is read from each of the detection electrodes (E). In the detection step, a capacitance is detected.

Abstract: To acquire touch position data with a good SN ratio without affecting a display action of a display element, a touch panel includes a non-drive region and a drive region. The non-drive region moves so as to correspond to one of a plurality of scanning signal lines selected and driven in order in a display period included in each frame of a display element. The drive region represents a region except for the non-drive region. A touch panel controller drives a signal line corresponding to the drive region and stops driving a signal line corresponding to the non-drive region.

Abstract: Sense lines in a self-capacitance touch panel are multiplexed. A touch panel controller (3) includes a drive circuit (4) that drives drive lines (D0 through D(K-1)), based on a drive code series, a code multiplication unit (11) that reads multiple linear sum signals along the sense lines (S0 through S(M-1)), based on the charges of detection electrodes (E) and performs an inner product computation with a detection code series, and a detection circuit (6) that detects a capacitance or a change in the capacitance.

Abstract: Capacitance distribution on a touch panel is detected with a simple configuration. A drive switch element between each of electrodes and a corresponding drive line is made to turn on and the drive line is driven on the basis of a code sequence. A sense switch element between each of the electrodes and a corresponding sense line is made to turn on and a linear sum signal of each of the electrodes is read along the sense line.

Abstract: Capacitance distribution between each of detection electrodes and a stylus pen on a touch panel is detected with a simple configuration. A read step and a detection step are included. In the read step, a switch element selected among a plurality of drive sense switch elements (DST) between detection electrodes (E) and drive sense lines (DS) aligned in an X-axis direction based on a code sequence via control lines (DSS) aligned in a Y-axis direction is made to turn on, and a linear sum signal is read from each of the detection electrodes (E). In the detection step, a capacitance is detected.

Abstract: To acquire touch position data with a good SN ratio without affecting a display action of a display element, a touch panel includes a non-drive region and a drive region. The non-drive region moves so as to correspond to one of a plurality of scanning signal lines selected and driven in order in a display period included in each frame of a display element. The drive region represents a region except for the non-drive region. A touch panel controller drives a signal line corresponding to the drive region and stops driving a signal line corresponding to the non-drive region.

Abstract: Capacitance distribution is detected on a touch panel with a simple configuration. Drive sense lines (DS0 to DS(M?1)) are driven at a first potential on the basis of a code sequence. Subsequently, each of drive sense switch elements (DST22 and DST22?) corresponding to a hand-touching region (22) is made to turn off, and a linear sum signal based on an electric charge of each of detection electrodes (E) is read.

Abstract: Capacitance distribution on a touch panel is detected with a simple configuration. A drive switch element between each of electrodes and a corresponding drive line is made to turn on and the drive line is driven on the basis of a code sequence. A sense switch element between each of the electrodes and a corresponding sense line is made to turn on and a linear sum signal of each of the electrodes is read along the sense line.

Abstract: The present disclosure detects capacitance distribution between each of detection electrodes and a detected subject on a touch panel with a simple configuration. A drive sense switch element selected among a plurality of drive sense switch elements (DST) on the basis of a code sequence via control lines turns on, and drive sense lines are driven at a first potential. A difference between linear sum signals based on an electric charge of each of the detection electrodes is then read. Subsequently, a capacitance or a change in capacitance between each of the detection electrodes of a touch panel and a detected subject is detected on the basis of a sum-of-product computation performed on the difference between the linear sum signals and the code sequence.

Abstract: For detecting a signal based on driving of a pen point of a stylus pen satisfactorily, a stylus pen (15) includes a changeover switch (34) having a grip portion terminal (35) of a grip portion (28), a pen point terminal (36) of a pen point (38), and a ground terminal (37) of a ground, the changeover switch (34) switching connection of the grip portion terminal (35) to either the pen point terminal (36) or the ground terminal (37).

Abstract: The possibility of occurrence of touch position misrecognition attributable to wall noise is reduced. There is provided a capacitance value estimator circuit (108b) that refers to dummy decoding results and thereby corrects actual decoding results. The dummy decoding results are decoding results for intersections (D6 and D7), and the actual decoding results are decoding results for intersections (D1 to D5).

Abstract: The influence of noise which changes over time in touch detection is suppressed in a timely manner. A touch panel system (1b) is provided with a touch panel (2), a driving circuit (4), a reading unit (40), a period definition unit (41) which defines a noise reading period for reading a noise signal while the driving circuit (4) does not drive capacitors, and a driving definition unit (42) which defines a driving pattern based on a noise signal read in the noise reading period.

Abstract: The present invention provides a touch panel controller for controlling even a large touch panel with little EMI. The touch panel controller of the present invention includes a plurality of driving circuits (DC1 through DCm) for driving respective drive lines (DL1 through DLm) of a capacitive touch panel unit 2 by supplying driving signals (Ds) to the respective drive lines (DL1 through DLm), and a rise/fall time of each of the driving signals (Ds) is variable.

Abstract: A stylus pen (15) includes a correction circuit that corrects difference between the number of controller clocks generated by a touch panel controller (2), which controls operation of a touch panel (3), for outputting a synchronization signal by the touch panel controller (2) and the number of pen clocks generated by the stylus pen (15) for receiving, by the stylus pen (15), the synchronization signal output from the touch panel controller (2).

Abstract: A touch panel system (1) according to one aspect of the invention includes: a stylus pen (15) including a drive circuit (26) that generates a first driving voltage based on a first code sequence and a second driving voltage based on a second code sequence, and a sensor circuit (40) that drives a pen point (38) with a multiplexed voltage obtained by multiplexing the first driving voltage and the second driving voltage; and a touch panel controller (2) that detects a position of the stylus pen (15) touching a touch panel.

Abstract: Noise mixing into a plurality of time-series signals time-discretely sampled based on a linear element is reduced. A sub-system (5a) performs frame-by-frame driving in which first frame driving to (M+1)-th frame driving are performed, in each of which first vector driving to (N+1)-th vector driving are performed. A sub-system (5b) performs a plurality-of-vector continuous driving in which k-th vector driving to (k+j)-th vector driving of each frame driving are performed.

Abstract: Realized is an electrostatic capacitance value distribution detecting device capable of determining whether or not external noise exists. An electrostatic capacitance value distribution detecting circuit (2) of an aspect of the present invention drives vertical signal lines (VL) to output, from horizontal signal lines (HL), electric charges corresponding to electrostatic capacitances, and then drives the horizontal signal lines to output, from the vertical signal lines, electric charges corresponding to the electrostatic capacitances. The electrostatic capacitance value distribution detecting device includes a noise detecting section (8) which determines whether or not external noise exists.

Abstract: For detecting a signal based on driving of a pen point of a stylus pen satisfactorily, a stylus pen (15) includes a changeover switch (34) having a grip portion terminal (35) of a grip portion (28), a pen point terminal (36) of a pen point (38), and a ground terminal (37) of a ground, the changeover switch (34) switching connection of the grip portion terminal (35) to either the pen point terminal (36) or the ground terminal (37).