Touch sensor system, and electronic device
A touch sensor system includes a driver which drives on the basis of code sequences which are orthogonal to one another and include +1 or −1 and each of which has a length N. A decoding section estimates on the basis of a first inner product operation of the outputs and the code sequences a first capacitance value and on the basis of a second inner product operation of the outputs and the code sequences a second capacitance value. A touch panel has a two-dimensional region including a hand placing region and a remainder region and processing sections.
1. A touch sensor system, comprising:
a control circuit including:
a driving section that (a) drives, on a basis of code sequences di (=di 1 , di 2 , . . . , diN, where i=1, . . . , M) which are orthogonal to one another and include elements each being either +1 or −1 and each of which has a length N, M drive lines in parallel for each of (I) a first capacitance column C 1 i (i=1, . . . , M) formed between the M drive lines and a first sense line and (II) a second capacitance column C 2 i (i=1, . . . , M) formed between the M drive lines and a second sense line, so that a voltage +V is applied for an element of +1 in the code sequences and that a voltage −V is applied for an element of −1 in the code sequences, and thus (b) outputs sFirst =(s 11 , s 12 ,. . . , s 1 N) from the first capacitance column and outputs sSecond =(s 21 , s 22 , . . . , s 2 N) from the second capacitance column; and
an estimation section that estimates, (a) on a basis of a first inner product operation of the outputs sFirst and the code sequences di, a first capacitance value in the first capacitance column which first capacitance value corresponds to a k 1 -th drive line and (b) on a basis of a second inner product operation of the outputs sSecond and the code sequences di, a second capacitance value in the second capacitance column which second capacitance value corresponds to a k 2 -th drive line; and
a sensor panel corresponding to the drive lines, the sense lines, the first capacitance column, and the second capacitance column, the sensor panel including a two-dimensional region including at least one partial region and a remainder region being a region other than the partial region;
wherein the control circuit,
carries out a first process in accordance with a partial region touch signal corresponding to a touch to the partial region; and
carries out a second process in accordance with a remainder region touch signal corresponding to a touch to the remainder region, the second process being different in kind from the first process,
the partial region is a palm placing region that corresponds to a non-input region where a palm is placed during user input to the sensor panel,
of the palm placing region and the remainder region, only the palm placing region is arranged to move within the two-dimensional region so as to follow movement of the center of mass of the partial region touch signal which corresponds to where the palm is placed during user input to the sensor panel, and
the remainder region touch signal corresponds to a plot signal generated by a stylus and/or a touch signal generated by a finger.
2. An electronic device, comprising:
the touch sensor system recited in claim 1 ; and
a display panel which either is placed on the sensor panel included in the touch sensor system or contains the sensor panel.
3. A touch sensor system, comprising:
a sensor panel including (I) a first capacitance column C 1 i (i=1, . . . , M) formed between M drive lines and a first sense line and (II) a second capacitance column C 2 i (i=1, . . . , M) formed between the M drive lines and a second sense line; and
an integrated circuit for controlling the sensor panel,
the integrated circuit including:
a drive section for (a) driving, on a basis of code sequences di (=di 1 , di 2 , . . . , diN, where i=1, . . . , M) which are orthogonal to one another and include elements each being either +1 or −1 and each of which has a length N, the M drive lines in parallel for each of (I) the first capacitance column C 1 i (i=1, . . . , M) and (II) the second capacitance column C 2 i (i=1, . . . , M) so that a voltage +V is applied for an element of +1 in the code sequences and that a voltage −V is applied for an element of −1 in the code sequences, and thus (b) outputting outputs sFirst =(s 11 , s 12 , . . . , s 1 N) from the first capacitance column and outputs sSecond =(s 21 , s 22 , . . . , s 2 N) from the second capacitance column; and
an estimation section for estimating (a) on a basis of a first inner product operation of the outputs sFirst and the code sequences di, a first capacitance value in the first capacitance column which first capacitance value corresponds to a k 1 -th drive line and (b) on a basis of a second inner product operation of the outputs sSecond and the code sequences di, a second capacitance value in the second capacitance column which second capacitance value corresponds to a k 2 -th drive line,
the sensor panel including a two-dimensional region including at least one partial region and a remainder region being a region other than the partial region, wherein
the integrated circuit:
carries out a first process in accordance with a partial region touch signal corresponding to a touch to the partial region; and
carries out a second process in accordance with a remainder region touch signal corresponding to a touch to the remainder region, the second process being different in kind from the first process,
the partial region is a palm placing region that corresponds to a non-input region where a palm is placed during user input to the sensor panel,
of the palm placing region and the remainder region, only the palm placing region is arranged to move within the two-dimensional region so as to follow movement of the center of mass of the partial region touch signal which corresponds to where the palm is placed during user input to the sensor panel, and
the remainder region touch signal corresponds to a plot signal generated by a stylus and/or a touch signal generated by a finger.
4. An electronic device, comprising:
the touch sensor system recited in claim 3 ; and
a display panel which either is placed on the sensor panel included in the touch sensor system or contains the sensor panel.
5. A touch sensor system, comprising:
a control circuit including,
a driving section that (a) drives, on a basis of code sequences di (=di 1 , di 2 , . . . , diN, where i=1, . . ., M) which are orthogonal to one another and include elements each being either +1 or −1and each of which has a length N, M drive lines in parallel for each of (I) a first capacitance column Ci 1 (i=1, . . . , M) fowled between the M drive lines and a first sense line and (II) a second capacitance column Ci 2 (i=1, . . . , M) formed between the M drive lines and a second sense line, and thus (b) outputting, to an analog integrator, outputs sFirst =(s 11 , s 12 , . . . , s 1 N) from the first capacitance column and outputs sSecond =(s 21 , s 22 , . . . , s 2 N) from the second capacitance column; and
an estimation section that estimates, (a) on a basis of a first inner product operation of the outputs sFirst and the code sequences di, a first capacitance value in the first capacitance column which first capacitance value corresponds to a k 1 -th drive line and (b) on a basis of a second inner product operation of the outputs sSecond and the code sequences di, a second capacitance value in the second capacitance column which second capacitance value corresponds to a k 2 -th drive line,
the driving section, for an element of +1 in the code sequences, driving the drive lines at (i) a first voltage when the analog integrator is reset and (ii) a second voltage when the outputs sFirst and sSecond from the first and second capacitance columns are sampled and, for an element of −1 in the code sequences, driving the drive lines at (i) the second voltage when the analog integrator is reset and (ii) the first voltage when the outputs sFirst and sSecond from the first and second capacitance columns are sampled,
the touch sensor system further comprising:
a sensor panel corresponding to the drive lines, the sense lines, the first capacitance column and the second capacitance column, the sensor panel including a two-dimensional region including at least one partial region and a remainder region being a region other than the partial region; wherein
the control circuit,
carries out a first process, in accordance with a partial region touch signal corresponding to a touch to the partial region; and
carries out a second process in accordance with a remainder region touch signal corresponding to a touch to the remainder region, the second process being different in kind from the first process,
the partial region is a palm placing region that corresponds to a non-input region where a palm is placed during user input to the sensor panel,
of the palm placing region and the remainder region, only the palm placing region is arranged to move within the two-dimensional region so as to follow movement of the center of mass of the partial region touch signal which corresponds to where the palm is placed during user input to the sensor panel, and
the remainder region touch signal corresponds to a plot signal generated by a stylus and/or a touch signal generated by a finger.
6. An electronic device, comprising:
the touch sensor system recited in claim 5 ; and
a display panel which either is placed on the touch panel included in the touch sensor system or contains the touch panel.