JP2010044470A5

JP2010044470A5 -

Info

Publication number: JP2010044470A5
Application number: JP2008206443A
Authority: JP
Filing date: 2008-08-08
Publication date: 2011-08-25
Anticipated expiration: 2028-08-08

Claims

A first electrode pattern of a plurality of rows in the capacitive sensor device, and an electrode driver for line-sequentially applied to the input pulse signal at a predetermined period,
A peak hold circuit for storing the peak levels of the detection signals extracted from the second electrode patterns in a plurality of columns intersecting with the first electrode pattern in the other layer, in the capacitive elements as corresponding potentials, respectively,
A current source that initializes the potential of the capacitive element within one cycle of the input pulse signal;
A comparator that compares the holding potential of the capacitive element with a reference value;
The holding potential of the capacitor element based on the timing information and the reference timing information indicating the reference value and the exchange difference timing, a plurality of the determination section determines the presence or absence of an operation input by the object with a human body or an equivalent electrical characteristics capacitive sensor device of capacitance change measurement circuit with.

The capacitance change measurement circuit according to claim 1, wherein the reference timing information is set for each measurement point corresponding to an intersection position of the first and second electrode patterns.

The timing information is a holding potential of the capacitive element from the edge detection timing of the input pulse signal is the elapsed time until the reference value and the exchange difference,
The reference timing information is the elapsed time when there is no operation.
Capacitive sensor device of capacitance change measuring circuit according to claim 1 or claim 2.

The start timing of the discharge operation by the current source is
The capacitance change measuring circuit of the capacitive sensor device according to any one of claims 1 to 3, wherein the capacitance change measuring circuit is defined after an appearance timing of a peak level assumed for the detection signal.

On the basis of first and propagation path length of the first and second electrode pattern, the total heat transfer搬経path length Ru is defined in combination with a second propagation path length to the electrode patterns, by operation area The capacitance change measurement circuit of the capacitive sensor device according to any one of claims 1 to 4 , wherein a pulse frequency of the input pulse signal is set.

For pre Kisoden搬経path length is short first operation area than the specified value, sets the pulse frequency of the input pulse signal to the first pulse frequency F1,
Before Kisoden for搬経path length is longer second operation region than the prescribed value, the electrostatic according to claim 5 to set the pulse frequency of the input pulse signal into a second pulse frequency F2 (> F1) Capacitance sensor measurement circuit for capacitive sensor devices.

On the basis of first and propagation path length of the first and second electrode pattern, the total heat transfer搬経path length Ru is defined in combination with a second propagation path length to the electrode patterns, by operation area The capacitance change measuring circuit of the capacitive sensor device according to any one of claims 1 to 4 , wherein a current amount of the current source is set.

For pre Kisoden搬経path length is short first operation area than the specified value, sets the current amount to the first amount of current I1,
Before Kisoden搬経path length for a long second operation region than the prescribed value, the capacitive sensor device according to claim 7 for setting the current amount of second current amount I2 (<I1) Capacitance change measurement circuit.

For pre Kisoden搬経path length is short third operating region than the prescribed value, setting the pulse frequency of the input pulse signal to the first pulse frequency F1,
Before Kisoden搬経path length for a long fourth operation region than the prescribed value, the electrostatic according to claim 8 for setting a pulse frequency of the input pulse signal into a second pulse frequency F2 (> F1) Capacitance sensor measurement circuit for capacitive sensor devices.

On the basis of first and propagation path length of the first and second electrode pattern, the total heat transfer搬経path length Ru is defined in combination with a second propagation path length to the electrode patterns, by operation area The capacitance change measuring circuit for the capacitive sensor device according to any one of claims 1 to 6 , wherein a reference value of the comparator is set.

For pre Kisoden搬経path length is longer first operation area than the specified value, sets the reference value to the first reference value R1,
Before Kisoden搬経path length for a short second operation region than the prescribed value, the capacitive sensor device according to claim 10 for setting the reference value to the second reference value R2 (> R1) Capacitance change measurement circuit.

The capacitance change measuring circuit according to any one of claims 1 to 11, wherein the peak hold circuit holds a peak level of a positive cycle of the detection signal.

The capacitance change measurement circuit of the capacitive sensor device according to claim 1, wherein the peak hold circuit holds a peak level of a negative cycle of the detection signal.

Said peak-hold circuit, the absolute value of the peak level of the peak level and the negative period of the positive electrode cycle of the detection signal is retained,
Said current source is within a half cycle of the input pulse signal, capacitive sensor device of capacitance change measuring circuit according to any one of claims 11 a potential of the capacitive element from claim 1 that turn into initial .

Capacitance having a plurality of rows of first electrode patterns to which an input pulse signal having a predetermined period is applied line-sequentially, and a plurality of rows of second electrode patterns intersecting the first electrode pattern in another layer. Type sensor device,
A peak hold circuit for storing the peak levels of the detection signals extracted from the second electrode patterns of the plurality of columns in the capacitive elements as corresponding potentials, respectively;
A current source that initializes the potential of the capacitive element within one cycle of the input pulse signal;
A comparator that compares the holding potential of the capacitive element with a reference value ;
Wherein the timing information indicating timing for holding the potential to exchange difference and the reference value of the capacitor, based on the reference timing information set for each propagation path of the input pulse signal, an object having a body or equivalent electrical characteristics capacitive sensor module including a plurality of the determination section determines the presence or absence of an operation input by.

A process of line-sequentially applying an input pulse signal at a predetermined period to the first electrode patterns of a plurality of rows constituting the capacitive sensor device;
Processing for storing the peak levels of the detection signals extracted from the second electrode patterns in a plurality of columns intersecting with the first electrode pattern in the other layer in the capacitive elements as corresponding potentials, respectively,
A process of initializing the potential of the capacitive element within one cycle of the input pulse signal;
A process of comparing the holding potential of the capacitive element with a reference value ;
Wherein the timing information indicating timing for holding the potential to exchange difference and the reference value of the capacitor, based on the reference timing information set for each propagation path of the input pulse signal, an object having a body or equivalent electrical characteristics capacitive sensor device capacitance change measurement method that includes a process of determining whether the operation input by.

A display device;
A capacitive sensor device disposed on a surface of the display device, wherein a plurality of rows of first electrode patterns to which an input pulse signal having a predetermined period is applied in a line-sequential manner, and the first electrode patterns, A capacitive sensor device having a plurality of rows of second electrode patterns intersecting at another layer;
A peak hold circuit for storing the peak levels of the detection signals extracted from the second electrode patterns of the plurality of columns in the capacitive elements as corresponding potentials, respectively;
A current source that initializes the potential of the capacitive element within one cycle of the input pulse signal;
A comparator that compares the holding potential of the capacitive element with a reference value ;
Wherein the timing information indicating timing for holding the potential to exchange difference and the reference value of the capacitor, based on the reference timing information set for each propagation path of the input pulse signal, an object having a body or equivalent electrical characteristics A plurality of determination units for determining whether or not there is an operation input by;
An electronic device equipped with a system control unit that controls the operation of the entire system.

A capacitive sensor device formed of a transmissive material, wherein a plurality of rows of first electrode patterns to which an input pulse signal having a predetermined period is applied in a line-sequential manner, the first electrode pattern, and the like A capacitive sensor device having a plurality of rows of second electrode patterns intersecting in layers;
A peak hold circuit for storing the peak levels of the detection signals extracted from the second electrode patterns of the plurality of columns in the capacitive elements as corresponding potentials, respectively;
A current source that initializes the potential of the capacitive element within one cycle of the input pulse signal;
A comparator that compares the holding potential of the capacitive element with a reference value ;
Wherein the timing information indicating timing for holding the potential to exchange difference and the reference value of the capacitor, based on the reference timing information set for each propagation path of the input pulse signal, an object having a body or equivalent electrical characteristics A plurality of determination units for determining whether or not there is an operation input by;
An electronic device equipped with a system control unit that controls the operation of the entire system.