JP5937808B2 - Touch panel control circuit, control method, touch panel input device using them, and electronic device - Google Patents

Description

  The present invention relates to a resistive film type touch panel.

  2. Description of the Related Art In recent years, electronic devices such as computers, mobile phone terminals, and PDAs (Personal Digital Assistants) are mainly provided with an input device for operating electronic devices by touching with a finger. As such an input device, a resistance film type (also called resistance type) touch panel (touch sensor) is known (Patent Document 1).

JP 2009-48233 A

  There is an operation called “flick input” as an input operation on the touch panel. Flick input is an operation in which a user's finger slides quickly from a certain point on the panel in a certain direction. Flick input is used for page slide in a web browser, page turning in an electronic book, or character input.

  The present invention has been made in such a situation, and one of exemplary purposes of an embodiment thereof is to provide a control circuit capable of detecting a flick input in a resistive touch panel.

  One embodiment of the present invention relates to a control circuit for a touch panel. The touch panel includes first, second, third, and fourth terminals, a first resistance film in which one side extending in the first direction is connected to the first terminal, and a side opposite to the first resistor is connected to the second terminal, A second resistive film disposed with a gap between the first resistive film and extending in a second direction perpendicular to the first direction and connected to the third terminal, and an opposite side connected to the fourth terminal; Have. The control circuit is connected to a coordinate detection unit that detects coordinates touched by a user based on a state from the first terminal to the fourth terminal, and a first detection terminal that is one of the first terminal and the second terminal, and A first capacitance detection circuit that detects a capacitance of the detection terminal; and a flick input determination unit that determines the presence or absence of a flick input in the second direction based on a time waveform of the capacitance of the first detection terminal.

  When flick input is performed on the resistance touch panel, the capacitance of the panel viewed from a certain detection terminal changes according to a certain pattern. According to this aspect, the flick input can be detected based on the time waveform of the capacity.

  When the time waveform of the capacitance of the first detection terminal increases over the determination period, the flick input determination unit determines that the flick input is in a direction approaching the first detection terminal, and the time waveform of the capacitance of the first detection terminal is When decreasing over the determination period, it may be determined as a flick input in a direction away from the first detection terminal.

  The control circuit according to an aspect may further include a second capacitance detection circuit that is connected to a second detection terminal that is one of the third terminal and the fourth terminal and detects a capacitance of the second detection terminal. The flick input determination unit may determine the presence / absence of a flick input in the first direction based on the time waveform of the capacitance of the second detection terminal.

  The first capacitance detection circuit and the second capacitance detection circuit may share a single capacitance detection circuit in a time division manner.

  When the time waveform of the capacitance of the second detection terminal increases over the determination period, the flick input determination unit determines that the flick input is in a direction approaching the second detection terminal, and the time waveform of the capacitance of the second detection terminal is When decreasing over the determination period, it may be determined that the input flicks away from the second detection terminal.

  The flick input determination unit may determine that the input is a flick input when the slope of the time waveform of the capacity in the determination period is included in a predetermined range.

  The control circuit according to an aspect may further include a filter for filtering the measured capacitance.

  The coordinate detection unit applies predetermined first and second bias voltages to the first and second terminals in the first state, sets the third and fourth terminals in a high impedance state, and sets the third and fourth terminals in the second state. A voltage generation unit that applies predetermined first and second bias voltages to each of the four terminals and sets the first and second terminals in a high impedance state, and occurs in at least one of the third and fourth terminals in the first state. A first panel voltage is detected, and in a second state, a voltage detector for detecting a second panel voltage generated at at least one of the first and second terminals, and a second direction in which the user contacts based on the first panel voltage And a coordinate calculation unit that calculates the coordinates of the first direction touched by the user based on the second panel voltage.

  Another aspect of the present invention relates to a touch panel input device. The touch panel input device includes first, second, third, and fourth terminals, a first resistance film having one side extending in the first direction connected to the first terminal and the opposite side connected to the second terminal. A second resistance film disposed with a gap from the first resistance film, extending in a second direction perpendicular to the first direction and connected to the third terminal, and a side opposite to the second resistance film connected to the fourth terminal; , And any one of the above-described control circuits for controlling the touch panel.

  Another embodiment of the present invention relates to an electronic device. The electronic device may include the touch panel input device described above.

  Note that any combination of the above-described components, or a conversion of the expression of the present invention between methods, apparatuses, and the like is also effective as an aspect of the present invention.

  According to an aspect of the present invention, a flick input can be detected on a resistive touch panel.

It is a block diagram which shows the structure of an electronic device provided with the touchscreen input device which concerns on embodiment. It is an equivalent circuit diagram of the touch panel at the time of single touch. FIGS. 3A and 3B are waveform diagrams of the capacitance of the first terminal when the user performs a flick input in the X-axis direction. 4A is an equivalent circuit diagram of the panel at the time of flick input, and FIG. 4B is a waveform diagram of capacitance sensing. 5A and 5B are time charts showing the operation of the control circuit. It is a circuit diagram which shows the structure of the control circuit which can utilize a touch panel as a proximity sensor.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. The embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

In this specification, “the state in which the member A is connected to the member B” means that the member A and the member B are electrically connected to each other in addition to the case where the member A and the member B are physically directly connected. It includes cases where the connection is indirectly made through other members that do not substantially affect the general connection state, or that do not impair the functions and effects achieved by their combination.
Similarly, “the state in which the member C is provided between the member A and the member B” refers to the case where the member A and the member C or the member B and the member C are directly connected, as well as their electric It includes cases where the connection is indirectly made through other members that do not substantially affect the general connection state, or that do not impair the functions and effects achieved by their combination.

  FIG. 1 is a block diagram illustrating a configuration of an electronic device 1 including a touch panel input device (simply referred to as an input device) 2 according to an embodiment. The input device 2 is disposed, for example, on the surface of an LCD (Liquid Crystal Display) 8 and functions as a touch panel. The input device 2 determines an X coordinate and a Y coordinate of a point (referred to as a contact point) touched by a user with a finger or a pen (hereinafter referred to as a finger 6).

  The input device 2 includes a touch panel 4 and a control circuit 100. The touch panel 4 is a 4-wire (4-terminal) resistive touch panel. Since the configuration of the touch panel 4 is general, it will be briefly described here.

  The touch panel 4 includes a first terminal P1 to a fourth terminal P4, a first resistance film RF1, and a second resistance film RF2. The first resistance film RF1 and the second resistance film RF2 are disposed so as to overlap with a gap in the Z-axis direction perpendicular to the X-axis and the Y-axis. One side E1 extending in the Y axis (first direction) of the first resistance film RF1 is connected to the first terminal P1. The side E2 facing the side E1 is connected to the second terminal P2. The third terminal P3 is connected to one side E3 extending in the X axis (second direction) of the second resistance film RF2, and the fourth terminal P4 is connected to one side E4 facing the side E3 of the second resistance film RF2. . The above is the configuration of the touch panel 4.

  The control circuit 100 includes a first state φ1 that detects coordinates in the X direction, a second state φ2 that detects coordinates in the Y direction, a third state φ3 that detects flick input in the X direction, and a flick input in the Y direction. The user's input is determined while switching in a time-division manner the fourth state φ4 for detecting.

  The control circuit 100 includes a first terminal Pc1 to a fourth terminal Pc4, a coordinate detection unit 110, and a flick input detection unit 120. The first terminal Pc1 to the fourth terminal Pc4 are respectively connected to the corresponding first terminal P1 to fourth terminal P4 on the touch panel 4 side.

  First, the configuration of the coordinate detection unit 110 will be described. The coordinate detection unit 110 includes a voltage generation unit 10, a voltage detection unit 20, and a coordinate calculation unit 26.

  The coordinate detection unit 110 detects the coordinates touched by the user based on the state of the first terminal P1 to the fourth terminal P4. The configuration and operation of the coordinate detection unit 110 are not particularly limited, and a resistance panel detection circuit which is publicly known or can be used in the future can be used.

The coordinate detection unit 110 of FIG. 1 includes a voltage generation unit 10, a voltage detection unit 20, and a coordinate calculation unit 26. First, a configuration for detecting coordinates in the X direction (X coordinates) will be described.
In the first state φ1, the voltage generator 10 applies predetermined first bias voltage Vb1 and second bias voltage Vb2 to the first terminal P1 and the second terminal P2, respectively. Here, Vb1> Vb2. Preferably, the second bias voltage Vb2 is the ground voltage (0V). In the first state, the voltage generator 10 places the third terminal P3 and the fourth terminal P4 in a high impedance state.

  The voltage detection unit 20 detects a voltage Vx (hereinafter referred to as a first panel voltage) Vx generated in at least one of the third terminal P3 and the fourth terminal P4 in the first state φ1. The voltage detection unit 20 includes a selector 22 and an A / D converter 24. For example, the selector 22 selects the voltage of the third terminal P3 in the first state φ1. The A / D converter 24 converts the first panel voltage Vx generated at the third terminal P3 into a digital value Dx.

The coordinate calculation unit 26 determines the X coordinate touched by the user based on the digital value Dx.
FIG. 2 is an equivalent circuit diagram of the touch panel 4 at the time of single touch. When the user contacts at the contact point PU, the first resistive film RF1 is divided into a resistor R11 between the first terminal P1 and the contact point PU and a resistor R12 between the contact point PU and the second terminal P2. The first resistance film RF1 and the second resistance film RF2 are in contact at the contact point PU, and the contact resistance is Rc. The resistance of the path from the contact point PU of the second resistance film RF2 to the third terminal P3 is R2.

  Since the potential at the contact point PU is obtained by dividing the bias voltages Vb1 and Vb2 by the resistors R11 and R12, the X coordinate of the contact point PU is indicated. And since the 3rd terminal P3 is high impedance, the voltage of the 3rd terminal P3 becomes substantially equal to the electric potential of the contact point PU. That is, the panel voltage Vx generated at the third terminal P3 indicates the X coordinate of the contact point PU.

  The algorithm for deriving the X coordinate from the panel voltage Vx may be a known technique and is not particularly limited in the present invention.

Next, a configuration for detecting a coordinate in the Y direction (Y coordinate) will be described.
In the second state φ2, the voltage generator 10 applies predetermined first bias voltage Vb1 and second bias voltage Vb2 to the third terminal P3 and the fourth terminal P4, respectively. In the second state φ2, the voltage generator 10 places the first terminal P1 and the second terminal P2 in a high impedance state. The first bias voltage Vb1 in each of the first state and the second state may be the same value or different. Below, the case of the same value is demonstrated. The same applies to the second bias voltage Vb2.

  The voltage detector 20 detects a voltage Vy (hereinafter referred to as a second panel voltage) Vy generated in at least one of the first terminal P1 and the second terminal P2 in the second state φ2. For example, the selector 22 selects the voltage of the first terminal P1 in the second state φ2. The A / D converter 24 converts the second panel voltage Vy generated at the first terminal P1 into a digital value Dy. The coordinate calculation unit 26 calculates the Y coordinate touched by the user based on the digital value Dy.

  Note that, in the first state φ1, the voltage detection unit 20 may measure the voltage generated at the fourth terminal P4 as the panel voltage Vx instead of or in addition to the third terminal P3. Similarly, in the second state φ2, the voltage detection unit 20 may measure the voltage generated at the second terminal P2 as the panel voltage Vy instead of or in addition to the first terminal P1.

  The above is the configuration of the coordinate detection unit 110. Next, the configuration of the flick input detection unit 120 will be described.

  The flick input detection unit 120 includes a first capacitance detection circuit 30x, a first A / D converter 32x, a first filter 34x, a second capacitance detection circuit 30y, a second A / D converter 32y, a second filter 34y, and a flick input determination unit 36. Is provided.

  The first capacitance detection circuit 30x, the first A / D converter 32x, the first filter 34x, and the flick input determination unit 42 detect the presence or absence of a flick input in the second direction (X-axis direction) in the third state φ3.

  The first capacitance detection circuit 30x is connected to the first terminal P1, which is a first detection terminal, detects the capacitance viewed from the touch panel 4 from the first terminal P1, and generates a detection signal C1 indicating the capacitance. The first capacitance detection circuit 30x may detect the capacitance of the second terminal P2 instead of the first terminal P1. The configuration of the first capacitance detection circuit 30x is not particularly limited, and a known circuit may be used. For example, the first capacitance detection circuit 30x may be a capacitance / voltage conversion circuit.

The first filter 34x is provided for the purpose of noise removal. For example, the first filter 34x is an analog moving average filter. The first filter 34x may be arranged after the first A / D converter 32x and may be configured by a digital filter.
The first A / D converter 32x converts the detection signal C1 output from the first capacitance detection circuit 30x into a digital value.

  The flick input determination unit 36 determines the presence or absence of flick input in the X-axis direction based on the time waveform of the capacity of the first terminal P1.

  As a result of studying flick input to the resistive touch panel, the present inventors have found that the terminal capacitance changes according to a certain pattern during flick input. 3A and 3B are waveform diagrams of the capacitor C1 of the first terminal P1 when the user performs a flick input in the X-axis direction. It should be noted that the knowledge regarding the time waveform of the capacity shown in FIGS. 3A and 3B should not be regarded as general technical common knowledge of those skilled in the art, but was first found by the present inventors.

  FIG. 3A shows a waveform when the user's finger flicks in the direction approaching the first terminal P1, that is, the X-axis negative direction. This flick input is a series of operations in which the user's finger is separated from the panel in the initial state, the user's finger is in contact with a certain point, the user's finger is slid, and is separated from the panel again.

  At this time, the time waveform of the capacitance C1 of the first terminal P1 takes an initial value before the time t1 when the finger touches, rapidly increases at the time t1 when the finger touches, and a period during which the finger slides (also referred to as a slide period). ) Increases at τ, and suddenly decreases to the initial value when the user's finger is released at time t2. In a general flick input, the slide period τ is several tens of ms to several hundreds of ms, more specifically 200 to 300 ms.

  FIG. 3B shows a waveform when the user's finger flicks in the direction away from the first terminal P1, that is, the positive direction of the X axis.

  At this time, the time waveform of the capacitance C1 of the first terminal P1 takes an initial value before time t1 when the finger touches, rapidly increases at time t1 when the finger touches, decreases during the slide period τ, and reaches the user at time t2. When the finger is removed, it suddenly decreases to the initial value.

The flick input determination unit 36 determines the presence / absence of flick input by utilizing the fact that the capacitance C1 changes with a substantially constant slope during the slide period τ. Specifically, the flick input determination unit 36 performs flick input in the negative X-axis direction when the time waveform of the capacitor C1 increases with a predetermined slope over a predetermined flick determination period (also simply referred to as a determination period) _TF. judge. On the other hand, when the time waveform of the capacitance C1 measured over the determination period _TF decreases with a predetermined slope, it is determined that the flick input is in the X axis positive direction. The determination period _TF is set shorter than the slide period τ, and may be, for example, about several tens of ms to 100 ms.

The inclination of the capacity C1 when the finger slides is determined according to the specification of the touch panel 4 and the speed at which the finger slides. Therefore, the flick input determination unit 36 may determine that the input is a flick input when the slope of the capacitance C1 in the determination period _TF is within a predetermined range. In other words, when the slope of the capacitor C1 is continuously included in the predetermined range over the determination period _TF , it may be determined that the input is a flick input. The predetermined range may be determined in advance based on the specification of the touch panel 4 or the like.

  Note that the waveforms in FIGS. 3A and 3B show flick input from an initial state where the finger is away from the panel. In the case of flick input from the initial state in which the finger touches the panel, it is understood that the capacitance value C1 takes another initial value before time t1, as indicated by a one-dot chain line.

FIG. 4A is an equivalent circuit diagram of the panel at the time of flick input. The capacitance detection circuit 30 is configured to measure the capacitance of a panel having a CR time constant, and has a non-zero sensing time T _S for measuring the capacitance. Sensing time _{T S} is about several ms, for example, 1 ms. As a means for detecting capacitance, a self-capacitance method and a mutual capacitor method are known. In any method, the detection signal Cs measured by one sensing has a waveform corresponding to the CR time constant. , the detection signal Cs in the sensing period T ends of the timing of _S (called sensing timing) Te is captured as the capacitance value.

  FIG. 4B is a waveform diagram of the detection signal Cs measured by the capacitance detection circuit 30. As shown in FIG. 4A, when the position of the contact point PU slides by flick input, the distance between the detection terminal P1 and the contact point PU, that is, the resistance component changes. If the CR time constant is large, the change rate of the detection signal Cs is slowed down. Therefore, the value of the detection signal Cs at the sensing timing Te is small. Conversely, if the CR time constant is small, the value of the detection signal Cs is large. Therefore, as shown in FIG. 4A, when the finger is slid from a state where the resistance Rs is large to a small state, the value of the detection signal Cs at the sensing timing Te increases with time. The detection signal Cs at the sensing timing Te measured by the capacitance detection circuit is data obtained by sampling the time waveform of the capacitance C1 measured by the flick input determination unit 36.

  The second capacitance detection circuit 30y, the second A / D converter 32y, the second filter 34y, and the flick input determination unit 36 detect the presence or absence of a flick input in the first direction (Y-axis direction) in the fourth state φ4. Provided.

  The second capacitance detection circuit 30y is connected to the third terminal P3 that is the second detection terminal, detects the capacitance of the third terminal P3, and generates a detection signal C3 indicating the capacitance. The second capacitance detection circuit 30y may detect the capacitance of the fourth terminal P4 instead of the third terminal P3. The configurations and operations of the second A / D converter 32y, the second filter 34y, and the flick input determination unit 42 are the same as those of the first A / D converter 32x, the first filter 34x, and the flick input determination unit 36 that have already been described.

  The flick input determination unit 36 determines that the flick input is in the direction approaching the third terminal P3 when the time waveform of the capacitance C3 of the third terminal P3, which is the second detection terminal, increases in the slide period τ. Conversely, when the time waveform of the capacitor C3 of the third terminal P3 decreases during the slide period, it is determined that the input is a flick input in a direction away from the third terminal P3.

The above is the configuration of the control circuit 100. Next, the operation will be described. 5A and 5B are time charts showing the operation of the control circuit 100. FIG.
As shown in FIGS. 5A and 5B, the first state φ1 to the fourth state φ4 are switched in a time-sharing manner in a predetermined order. In the sequence of FIG. 5A, the X coordinate is determined in the first state φ1, and the Y coordinate is determined in the second state φ2. Subsequently, the flick detection in the X direction in the third state φ3 and the flick detection in the Y direction in the fourth state φ4 are simultaneously performed. For each sensing period _{T S} in particular, the first capacitance detection circuit 30x and the 1A / D converter 32x, the time waveform of the capacitor C1 viewed panel from the first terminal P1 is sampled. It is determined whether or not the time waveform of the capacitor C1 that is sequentially sampled matches the flick input pattern.

  In the sequence of FIG. 5B, the flick detection in the X direction in the third state φ3 and the flick detection in the Y direction in the fourth state φ4 are performed in a time division manner in different time slots.

When detecting the movement of the user's finger, a frequency of about 100 Hz is required to detect the coordinates. In this case, that is, one period is 10 ms. In a control circuit of a general resistance touch panel, the time required for detecting the X coordinate and the Y coordinate is sufficiently shorter than 10 ms. Further, the sensing time _{T S} required for the capacitance detection by the capacitance detection circuits, several ms, for example, about 1 ms. Therefore, it is possible to detect the capacity of the panel in addition to the coordinate detection within the repetition period of 10 ms.

In the sequences of FIGS. 5A and 5B, the waveform of the capacitor C1 is sampled every 10 ms, so that 10 samplings of continuous data corresponds to the waveform of the determination period _TF . The flick input determination unit 36 stores sequentially input data of the capacity C1, and determines flick input over a flick determination period _TF , that is, when 10 consecutive data increase or decrease with a predetermined slope. . A FIFO or the like can be used for data storage. The same applies to the capacitor C3.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are within the scope of the present invention. is there. Hereinafter, such modifications will be described.

  In this modification, the touch panel 4 is used as a proximity sensor. FIG. 6 is a circuit diagram showing a configuration of a control circuit 100a that can use the touch panel 4 as a proximity sensor. In FIG. 6, the coordinate detection unit 110 and the flick input detection unit 120 of FIG. 1 are omitted. The capacitance detection circuit 30 may use the first capacitance detection circuit 30x and the second capacitance detection circuit 30y of FIG. 1 or may be provided separately. Switches SW <b> 1 to SW <b> 4 are provided in the previous stage of the capacitance detection circuit 30. For example, when all the switches SW1 to SW4 are turned on, the touch panel 4 becomes a huge capacitance sensor. The capacitance detection circuit 30 measures the capacitance of the touch panel 4. The proximity determination unit 40 determines whether or not an object is close to the panel based on the measured capacitance.

  In the mobile phone terminal, when the user brings the terminal close to the ear during a call, processing such as turning off the display is performed to reduce power consumption, and it is convenient if the proximity of the object to the touch panel 4 can be detected. According to the control circuit 100a, the proximity of an object to the panel can be detected without providing a separate proximity sensor.

  The first capacitance detection circuit 30x and the second capacitance detection circuit 30y may share a single A / D converter in a time division manner. The same applies to the first A / D converter 32x and the second A / D converter 32y, and the first filter 34x and the second filter 34y.

  In the embodiment, a part of the control circuit 100 in FIG. 1 is shared in the first state φ1 and the second state φ2, but may be provided completely separately. Further, the present invention may be applied to only one of the X direction and the Y direction only.

  In the embodiment, the case where the four-terminal touch panel 4 is controlled has been described. However, the present invention is not limited to this, and can be applied to other touch panels 4.

  Although the present invention has been described using specific terms based on the embodiments, the embodiments only illustrate the principles and applications of the present invention, and the embodiments are defined in the claims. Many variations and modifications of the arrangement are allowed without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Input device, 4 ... Touch panel, 6 ... Finger, 8 ... LCD, 100 ... Control circuit, 110 ... Coordinate detection part, 120 ... Flick input detection part, P1 ... 1st terminal, P2 ... 2nd Terminal, P3 ... Third terminal, P4 ... Fourth terminal, RF1 ... First resistance film, RF2 ... Second resistance film, 10 ... Voltage generation unit, 20 ... Voltage detection unit, 22 ... Selector, 24 ... A / D converter , 26 ... coordinate calculation unit, 30x ... first capacitance detection circuit, 32x ... first A / D converter, 34x ... first filter, 30y ... second capacitance detection circuit, 32y ... second A / D converter, 34y ... second filter 36: Flick input determination unit.

Claims (13)

The first, second, third, and fourth terminals, one side extending in the first direction is connected to the first terminal, and the side opposite to the first resistance film is connected to the second terminal; A second resistive film disposed with a gap between the first resistive film and extending in a second direction perpendicular to the first direction and connected to the third terminal, and a side facing the third resistive film being connected to the fourth terminal; A control circuit for a touch panel comprising:
A coordinate detection unit that detects the coordinates of the contact point of the user based on the state of the fourth terminal from the first terminal;
The first detection terminal which is one of the first terminal and the second terminal is connected, and the capacitance C of the first detection terminal and the distance between the contact point of the user and the first detection terminal for each sensing. A first capacitance detection circuit for generating a first detection signal corresponding to the resistance component R depending on
A flick input determination unit that determines the presence or absence of a flick input in the second direction based on the time waveform of the first detection signal ;
A control circuit comprising:   The first capacitance detection circuit samples the first detection signal at a predetermined timing within a sensing time for each sensing,
  2. The flick input determination unit according to claim 1, wherein the flick input determination unit determines presence / absence of a flick input in the second direction based on a change in the first detection signal continuously sampled a plurality of times. Control circuit. The flick input determination unit
When the time waveform of the first detection signal increases over a determination period, the flick input is determined to approach the first detection terminal;
3. The control circuit according to claim 1, wherein when the time waveform of the first detection signal decreases over a determination period, it is determined as a flick input in a direction away from the first detection terminal. Connected to a second detection terminal that is one of the third terminal and the fourth terminal, and for each sensing, the capacitance C of the second detection terminal and the distance between the contact point of the user and the second detection terminal A second capacitance detection circuit for generating a second detection signal corresponding to the resistance component R depending on
The flick input determination unit, the second based on the time waveform of the detection signal, the control circuit according to any one of claims 1 to 3, characterized in that to determine the presence or absence of a flick input to the first direction.   The second capacitance detection circuit samples the second detection signal at a predetermined timing within a sensing time for each sensing,
  The said flick input determination part determines the presence or absence of the flick input with respect to the said 1st direction based on the change of the said 2nd detection signal continuously sampled in multiple times. Control circuit. The flick input determination unit
When the time waveform of the second detection signal increases over a determination period, it is determined as a flick input in a direction approaching the second detection terminal,
6. The control circuit according to claim 4 , wherein when the time waveform of the second detection signal decreases over a determination period, it is determined as a flick input in a direction away from the second detection terminal. The flick input determination unit
When the gradient of the time waveform before Symbol first detection signal is included in a predetermined range, the control circuit according to claim 1, characterized in that to determine that flick input 3. Control circuit according to any one of claims 1 to 3, further comprising a filter for filtering the pre-Symbol first detection signal. The coordinate detector is
In the first state, predetermined first and second bias voltages are applied to the first and second terminals, respectively, the third and fourth terminals are set in a high impedance state, and in the second state, the third and fourth terminals are set. A voltage generating unit that applies predetermined first and second bias voltages to each of the first and second terminals to enter a high impedance state;
In the first state, a first panel voltage generated at at least one of the third and fourth terminals is detected, and in the second state, a second panel voltage generated at at least one of the first and second terminals is detected. A voltage detector to
A coordinate calculator that calculates the coordinates of the second direction that the user has contacted based on the first panel voltage, and the coordinates of the first direction that the user has contacted based on the second panel voltage;
Control circuit according to any one of claims 1 to 8, which comprises a. The first, second, third, and fourth terminals, one side extending in the first direction is connected to the first terminal, and the side opposite to the first resistance film is connected to the second terminal; A second resistive film disposed with a gap between the first resistive film and extending in a second direction perpendicular to the first direction and connected to the third terminal, and a side facing the third resistive film being connected to the fourth terminal; And a touch panel having
A control circuit according to any one of claims 1 to 9 , which controls the touch panel;
A touch panel input device comprising: An electronic apparatus comprising the touch panel input device according to claim 10 . The first, second, third, and fourth terminals, one side extending in the first direction is connected to the first terminal, and the side opposite to the first resistance film is connected to the second terminal; A second resistive film disposed with a gap between the first resistive film and extending in a second direction perpendicular to the first direction and connected to the third terminal, and a side facing the third resistive film being connected to the fourth terminal; A method of controlling a touch panel having
Detecting the coordinates of the contact point of the user based on the state of the fourth terminal from the first terminal;
For each sensing, the capacitance C of the first detection terminal, which is one of the first terminal and the second terminal, and the resistance component R depending on the distance between the contact point of the user and the first detection terminal are determined. Sampling the first detection signal at a predetermined timing within the sensing time;
Determining the presence or absence of flick input in the second direction based on the time waveform of the first detection signal continuously sampled a plurality of times ;
A method comprising the steps of: The step of determining includes
When the time waveform of the first detection signal increases over a determination period, the flick input is determined to approach the first detection terminal;
The method according to claim 12 , wherein when the time waveform of the first detection signal decreases over a determination period, it is determined as a flick input in a direction away from the first detection terminal.

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