WO2020161894A1

WO2020161894A1 - Touch panel press sensing device, electronic device, and touch panel press sensing method

Info

Publication number: WO2020161894A1
Application number: PCT/JP2019/004645
Authority: WO
Inventors: 富強韓; 健人東堤
Original assignee: 三菱電機株式会社
Priority date: 2019-02-08
Filing date: 2019-02-08
Publication date: 2020-08-13
Also published as: JP6869451B2; DE112019006576T5; JPWO2020161894A1

Abstract

This invention involves: a movement velocity computation unit (102) which computes movement velocities of a coil unit (20A) when the coil unit (20A) moves on the basis of an electromotive force which is generated in accordance with the movement of the coil unit (20A); a time computation unit (103) which computes, as a time for determination, a time from when the movement velocities computed by the movement velocity computation unit (102) exceed zero to when said movement velocities return to zero; a movement quantity computation unit (104) which integrates, over the time for determination computed by the time computation unit (103), the movement velocities computed by the movement velocity computation unit (102), and computes a movement quantity of the coil unit (20A) for the time for determination; and a press determination unit (105) which determines whether there is a press operation on the basis of the time for determination computed by the time computation unit (103) and the movement quantity computed by the movement quantity computation unit (104).

Description

Touch panel indentation detection device, electronic device, and touch panel indentation detection method

The present invention relates to a push-in detection device for a touch panel that detects a push operation on the touch panel.

Conventionally, a device that detects a pressing operation on a touch panel by a user is known. For example, the input device disclosed in Patent Document 1 uses a voice coil arranged in a magnetic circuit to provide tactile feedback to a user and detects a pressing operation. Specifically, the input device outputs a pressing signal when an electromotive force is generated in the voice coil by pressing the touch panel, and based on the pressing signal, it is determined whether or not the user performs a pressing operation on the touch panel. To detect.

International Publication No. 2012/169138

In the conventional technology represented by the technology of the input device disclosed in Patent Document 1, even when the electromotive force is generated instantaneously, it is detected as a pressing operation. For this reason, in the related art, for example, even when the touch panel is momentarily pressed by the user's unintentional contact with the touch panel, there is a possibility of erroneous detection as a pressing operation. That is, the conventional technique has a problem that a pressing operation on the touch panel may be erroneously detected.

The present invention has been made to solve the above problems, and an object thereof is to provide a touch panel push-in detection device capable of preventing erroneous detection of a touch panel push-in operation.

A touch panel indentation detection device according to the present invention includes a touch panel, a main body housing, a coil unit fixed to the touch panel, and a magnetic circuit unit fixed to the main body housing, and a voice coil actuator for vibrating the touch panel. A push-in detection device for a touch panel for detecting a push-in operation on the touch panel in an electronic device, wherein the touch panel and the coil section move relative to the main body housing by a push-in operation on the touch panel, Based on the generated electromotive force, the moving speed calculation unit that calculates the moving speed of the coil unit when the coil unit moves, and the moving speed calculated by the moving speed calculation unit from when it becomes greater than zero until it becomes zero again. The time calculation unit that calculates time as the determination time and the movement speed calculated by the movement speed calculation unit are integrated for the determination time calculated by the time calculation unit, and the movement amount of the coil unit at the determination time is calculated. And a push-down determination unit that determines whether or not there is a push-in operation based on the determination time calculated by the time calculation unit and the movement amount calculated by the movement calculation unit. Is.

According to this invention, it is possible to prevent erroneous detection of the touch panel pressing operation.

FIG. 3 is a front view of the electronic device according to the first embodiment. FIG. 2 is a sectional view taken along the line II-II of FIG. 1. FIG. 3 is a sectional view taken along the line III-III of FIG. 1. It is a figure which shows the structural example of the indentation detection apparatus which concerns on Embodiment 1. FIG. 6 is a diagram for explaining an electromotive force generated in a coil, a magnetic flux density in a magnetic gap, and a direction in which a moving speed of the coil portion is generated when the coil portion is moved in the first embodiment. FIG. 6 is a diagram showing an example of a movement amount calculated by a movement amount calculation unit in the first embodiment. 7A to 7C are for describing an image of the determination of whether or not the pressing of the touch panel is performed by the pressing operation, which is performed by the pressing determination unit based on the determination time and the movement amount in the first embodiment. 7A and FIG. 7A show an image of the judgment time and a change in the moving speed during the judgment time when the touch panel is pushed by a touch operation, and FIGS. 7B and 7C are The images of the judgment time and the change of the moving speed in the judgment time when the touch panel is pressed not by the pressing operation are shown. 5 is a flowchart for explaining the operation of the push-in detection device according to the first embodiment. FIG. 3 is a diagram showing a configuration example of an electronic device including a plurality of voice coil actuators in the first embodiment. 10A and 10B are movements for determination calculated by the indentation detection device when the electronic device is the electronic device as shown in FIG. 9 and the indentation of the touch panel occurs at the indentation position in the first embodiment. FIG. 10A is a diagram for explaining the image of the amount, and FIG. 10A shows that the moving speed of the coil portion of the first voice coil actuator becomes larger than zero and then becomes zero again when the touch panel is pressed at the pressing position. FIG. 10B shows an image of the movement amount of the coil portion up to, and when the touch panel is pushed at the pushing position, the moving speed of the coil portion of the fourth voice coil actuator is larger than zero. The figure shows an image of the amount of movement of the coil portion from when it becomes zero again. 11A and 11B are diagrams illustrating an example of the hardware configuration of the push-in detection device according to the first embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1.
1 to 3 are diagrams for describing the configuration of electronic device 1000 according to the first embodiment.
The electronic device 1000 according to the first embodiment is, for example, an in-vehicle device installed in a vehicle. As will be described later, the electronic device 1000 includes a main body housing 13 and a touch panel 14, and the touch panel 14 is supported so as to be movable relative to the main body housing 13. When using the electronic device 1000, the user can perform an operation of pressing the touch panel 14 (hereinafter, referred to as “pressing operation”), if necessary. When the user presses the touch panel 14, the touch panel 14 moves relative to the main body housing 13. The electronic device 1000 includes the push-in detection device 100 that detects a push-in operation on the touch panel 14 by a user. It should be noted that the indentation detection device 100 is not shown in FIGS. 1 to 3. Details of the indentation detection device 100 will be described later.

1 is a front view of an electronic device 1000 according to the first embodiment, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. Is.
In the first embodiment, in electronic device 1000 installed in a vehicle, the direction side toward the rear of the vehicle is referred to as the “front side”. FIG. 1 is a front view of the electronic device 1000 viewed from the front side. Further, in the first embodiment, in electronic device 1000 installed in a vehicle, the side opposite to the front side and facing the front of the vehicle is referred to as the “rear side”.

As shown in FIGS. 1 to 3, the electronic device 1000 according to the first embodiment includes a front design panel 11, a back design panel 12, a main body housing 13, a touch panel 14, a liquid crystal panel 15, a spring 16, and A voice coil actuator 20 is provided.
A vehicle panel 51, a mounting plate 52, and a vehicle-side fixing portion 53 are provided in the vehicle compartment of the vehicle.

The front side design panel 11 and the back side design panel 12 form an outer shell of the electronic device 1000 and are joined to each other.
The front design panel 11 is disposed on the front side of the electronic device 1000 and has a substantially rectangular frame shape. The front design panel 11 has a substantially rectangular opening 11a.
The rear design panel 12 is arranged on the rear side of the electronic device 1000 and has a substantially rectangular plate shape. The lower edge portion of the front design panel 11 and the lower edge portion of the rear design panel 12 are covered with a vehicle panel 51 from the outside of these lower edge portions and are fixed to the vehicle panel 51.

The main body housing 13, the liquid crystal panel 15, the spring 16, and the voice coil actuator 20 are provided in an internal space formed by joining the front design panel 11 and the back design panel 12. The touch panel 14 is provided in the space defined by the opening 11 a of the front design panel 11. The main body housing 13 is fixed to the vehicle-side fixing portion 53 via a mounting plate 52. In the first embodiment, the main body housing 13 and the other components of the electronic device 1000 have different configurations, but this is merely an example. The main body housing 13 only needs to support the touch panel 14 so as to be movable relative to the main body housing 13, and is provided integrally with any of the other components of the electronic device 1000, and has a function. It may be used in combination.

The touch panel 14 and the liquid crystal panel 15 are both substantially rectangular when viewed from the front side. The touch panel 14 is larger than the liquid crystal panel 15 when viewed from the front side.
The rear surface of the touch panel 14 and the front surface of the liquid crystal panel 15 are attached to each other. In the first embodiment, one surface of each component of electronic device 1000 on the front side is referred to as “front surface”, and one surface on the back side is referred to as “rear surface”.
The touch panel 14 and the liquid crystal panel 15 are attached to each other so that the liquid crystal panel 15 is located at a substantially central portion of the touch panel 14. Therefore, the liquid crystal panel 15 does not exist on the outer peripheral portion of the rear surface of the touch panel 14.

The touch panel 14 is provided in a space defined by the opening 11 a of the front design panel 11 in a state of being attached to the liquid crystal panel 15. The front surface of the touch panel 14 is exposed from the opening 11a of the front design panel 11 and faces the front side, and constitutes the operation surface 14a. The operation surface 14a receives a touch operation from a user or a touch panel pressing operation from a user.

The springs 16 are provided at a plurality of positions between the front surface of the main body housing 13 and the outer peripheral edge portion on the rear surface of the touch panel 14. The spring 16 is, for example, a leaf spring having a bent shape and having one end and the other end. One end of the spring 16 is fixed to the front surface of the main body housing 13 with a screw 17. The other end of the spring 16 is fixed to the outer peripheral edge of the rear surface of the touch panel 14 with a screw 17. The touch panel 14 is supported by the elastic force of the spring 16 so as to be movable relative to the main body housing 13. In other words, the touch panel 14 is in a floating state with respect to the main body housing 13. In a state where the touch panel 14 is not pushed (hereinafter referred to as “initial state”), the touch panel 14 is substantially stationary at a predetermined relative position (hereinafter referred to as “initial position”) with respect to the main body housing 13. ing.
In the first embodiment, the touch panel 14 is supported by the spring 16 so as to be movable relative to the main body housing 13, but this is merely an example. For example, the touch panel 14 may be supported by an elastic member other than the spring 16 so as to be relatively movable with respect to the main body housing 13, and the touch panel 14 is supported so as to be relatively movable with respect to the main body housing 13. It should be done.

The voice coil actuator 20 is an actuator for vibrating the touch panel 14, and one or more are provided between the front surface of the main body casing 13 and the outer peripheral edge portion on the rear surface of the touch panel 14.
In FIGS. 1 and 3, as an example, only one voice coil actuator 20 is provided on the rear surface of the touch panel 14.

The voice coil actuator 20 has a coil portion 20A and a magnetic circuit portion 20B. The outer shapes of the coil portion 20A and the magnetic circuit portion 20B are, for example, substantially circular shapes. The coil portion 20A and the magnetic circuit portion 20B are arranged substantially coaxially. The coil portion 20A is fixed to the outer peripheral edge portion on the rear surface of the touch panel 14. On the other hand, the magnetic circuit unit 20B is fixed to the front surface of the main body housing 13.

The coil portion 20A includes a pusher 21, a coil bobbin 22, and a coil 23. A voltage measuring circuit 28 is connected to the coil 23.
The pusher 21 is a member for transmitting a force to the rear surface of the touch panel 14 when the voice coil actuator 20 operates. The front surface of the pusher 21 is fixed to the rear surface of the touch panel 14. The outer shape of the pusher 21 is, for example, a substantially circular shape.
The coil bobbin 22 is fixed to the rear surface of the pusher 21. The coil bobbin 22 has a substantially cylindrical shape. The coil 23 serves as a vibration source of the voice coil actuator 20, and is wound around the outer peripheral surface of the coil bobbin 22.

The magnetic circuit unit 20B has a yoke 24, a pole 25, and a magnet 26. The yoke 24 and the pole 25 are made of a magnetic material.

The yoke 24 is composed of a substantially circular bottom plate portion and a cylindrical portion. The bottom plate portion of the yoke 24 is fixed to the front surface of the main body housing 13 with screws 18. The screw 18 penetrates a through hole 13 a formed in the main body housing 13 from the back side of the main body housing 13 to fasten the bottom plate portion of the yoke 24 and the main body housing 13.

The pole 25 and the magnet 26 are provided in the inner space of the cylindrical portion of the yoke 24. The outer shapes of the pole 25 and the magnet 26 are, for example, substantially circular shapes. The pole 25 and the magnet 26 are arranged so as to be superposed substantially coaxially. The magnet 26 is provided on the bottom surface in the internal space of the cylindrical portion of the yoke 24, and the pole 25 is provided on the front surface of the magnet 26. The outer diameter of the pole 25 is equal to or larger than the outer diameter of the magnet 26.

A substantially annular magnetic gap 27 is formed between the inner peripheral surface of the cylindrical portion of the yoke 24 and the outer peripheral surface of the pole 25. The coil 23 wound around the outer peripheral surface of the coil bobbin 22 is arranged in the magnetic gap 27. By arranging the coil 23 in the magnetic gap 27, the magnet 26 is arranged inside the coil 23. The voice coil actuator 20 is a so-called inner magnet type voice coil actuator having a structure in which the magnet 26 is arranged inside the coil 23.

The coil 23 and the coil bobbin 22 of the voice coil actuator 20 are integrated as a result of the interaction between the oscillating current supplied to the coil 23 and the magnetic flux flowing in the magnetic gap 27 from the pole 25 toward the yoke 24. It vibrates in the axial direction of the coil portion 20A. More specifically, for example, when a control device (not shown) detects a touch operation on the touch panel 14, the oscillating current is supplied to the voice coil actuator 20. When the oscillating current is supplied, the coil portion 20A of the voice coil actuator 20 vibrates according to the oscillating current.
The vibration generated by the voice coil actuator 20 is transmitted to the touch panel 14. As a result, the touch panel 14 vibrates.
A predetermined amount of clearance is provided between the rear surface of the pusher 21 and the front surface of the pole 25. This gap is such that the rear face of the pusher 21 and the front face of the pole 25 do not come into contact with each other even if the coil portion 20A vibrates.

In the first embodiment, among the constituent parts of the electronic device 1000, the constituent parts that do not move relative to the vehicle-side fixed part 53, that is, the front design panel 11, the back design panel 12, and the main body housing 13. , And the magnetic circuit unit 20B are collectively referred to as a fixed unit.
In addition, in the first embodiment, among the constituent parts that configure the electronic device 1000, the touch panel 14, the liquid crystal panel 15, and the coil part 20A that are relatively movable parts with respect to the fixed part are provided. Collectively, they are also called movable parts.

In the voice coil actuator 20, a voltage measuring circuit 28 is connected to the coil 23.
The voltage measurement circuit 28 measures the electromotive force (e[V]) generated in the coil 23 of the coil unit 20A.
In the electronic device 1000, for example, when a load in the pushing direction is applied to the touch panel 14 from the initial state where the touch panel 14 is in the initial position, the movable portion moves relatively to the fixed portion. The fact that the movable portion moves relative to the fixed portion means that the touch panel 14 and the coil portion 20A move relative to the main body housing 13. At this time, the coil 23 passes so as to cross the magnetic circuit formed by the magnetic circuit portion 20B, so that an electromotive force is generated in the coil 23. The voltage measuring circuit 28 measures the electromotive force generated in the coil 23. The voltage measuring circuit 28 is always measuring the electromotive force.
The push-in detection device 100, which will be described later, detects the push-in operation of the touch panel 14 by the user based on the electromotive force measured by the voltage measurement circuit 28.

The indentation detection device 100 according to the first embodiment will be described. Although not shown in FIGS. 1 to 3, the electronic device 1000 includes the push-in detection device 100 as described above. The push-in detection device 100 is configured by, for example, a CPU and a memory included in the electronic device 1000.
When the push-in of the touch panel 14 occurs in the electronic device 1000, in other words, when an electromotive force occurs in the coil 23, the push-in detection device 100 determines whether or not the push-in is due to the push-in operation of the touch panel 14 by the user. To do.

FIG. 4 is a diagram showing a configuration example of the indentation detection device 100 according to the first embodiment.
The push-in detection device 100 includes an electromotive force acquisition unit 101, a moving speed calculation unit 102, a time calculation unit 103, a movement amount calculation unit 104, a push-down determination unit 105, and an output unit 106.

The electromotive force acquisition unit 101 acquires information on the electromotive force measured by the voltage measurement circuit 28. The electromotive force acquisition unit 101 acquires information on the electromotive force measured by the voltage measurement circuit 28 at each electromotive force measurement time. In the first embodiment, the acquisition of information for each electromotive force measurement time by the electromotive force acquisition unit 101 is always performed.
The electromotive force acquisition unit 101 outputs the acquired electromotive force information to the moving speed calculation unit 102.

The moving speed calculation unit 102 calculates the moving speed of the coil unit 20A when the coil unit 20A moves based on the electromotive force information acquired by the electromotive force acquisition unit 101.
When a load is applied to the touch panel 14 to move the movable portion and the coil portion 20A included in the movable portion moves, an electromotive force (e) is generated in the coil 23. The electromotive force in this case is as shown in the following expression (1) from the Fleming's right-hand rule.
e=BLvsin θ [V] (1)
B: magnetic flux density in the magnetic gap 27, L: coil wire length of the coil 23, v: moving speed of the coil portion 20A, θ: angle between the direction of magnetic flux in the magnetic gap 27 and the moving direction of the coil portion 20A.

FIG. 5 illustrates the electromotive force generated in the coil 23, the magnetic flux density in the magnetic gap 27, and the direction in which the moving speed of the coil portion 20A is generated when the coil portion 20A is moved in the first embodiment. FIG.
The magnetic flux density in the magnetic gap 27 and the coil wire length of the coil 23 are obtained from the specifications of the voice coil actuator 20. The angle (θ) between the direction of the magnetic flux in the magnetic gap 27 and the moving direction of the coil portion 20A is 90°. Therefore, if the measured value of the electromotive force can be acquired, the moving speed calculation unit 102 can calculate the moving speed of the coil unit 20A when the push-in occurs on the touch panel 14 based on the measured value of the electromotive force.
The moving speed calculation unit 102 associates the calculated moving speed information with the information on the time when the moving speed is calculated, and temporarily stores the calculated moving speed information in at least a location where the time calculating unit 103 and the moving amount calculating unit 104 can refer to. Remember. In the first embodiment, as an example, the moving speed calculating unit 102 associates the calculated moving speed information with the information of the time when the moving speed is calculated, in a memory (not shown) included in the push-in detection device 100, and temporarily stores the information. Be remembered.

The time calculation unit 103 calculates the time (hereinafter, referred to as “judgment time”) from when the moving speed becomes greater than zero to when the moving speed becomes zero again based on the moving speed calculated by the moving speed calculating unit 102.
Based on the moving speed calculated by the moving speed calculating unit 102, the time calculating unit 103 determines that the moving speed of the coil unit 20A is greater than zero from a state of zero or less, and the moving speed is greater than zero. To detect that it has become zero again. Further, the time calculation unit 103 determines that the moving speed of the coil unit 20A becomes zero again based on the moving speed calculated by the moving speed calculating unit 102 and the time stored in association with the moving speed. The determination time is calculated by taking the difference from the time when the moving speed becomes greater than zero.
The time calculation unit 103 outputs information on the calculated determination time to the push-in determination unit 105. Further, the time calculation unit 103 outputs a determination time elapsed notification indicating that the determination time has elapsed to the movement amount calculation unit 104.

The movement amount calculation unit 104 integrates the movement speed calculated by the movement speed calculation unit 102 for the determination time calculated by the time calculation unit 103, and calculates the movement amount of the coil unit 20A during the determination time. For example, when the determination time elapse notification is output from the time calculation unit 103, the movement amount calculation unit 104 calculates the movement amount of the coil unit 20A during the determination time. In the first embodiment, “integration” does not have to be an operation having a mathematically strict meaning, and includes integration of discrete values, for example.
FIG. 6 is a diagram showing an example of the movement amount calculated by the movement amount calculation unit 104 in the first embodiment.
The movement amount calculation unit 104 outputs information on the calculated movement amount to the push-in determination unit 105.
The movement amount calculation unit 104 deletes the movement speed information temporarily stored by the movement speed calculation unit 102 each time the determination movement amount is calculated or when the push-in detection device 100 is powered off. I shall.

The push-down determination unit 105 determines whether the push-in generated on the touch panel 14 is a push-in operation based on the determination time calculated by the time calculation unit 103 and the movement amount calculated by the movement amount calculation unit 104. Then, the pressing operation of the touch panel 14 by the user is detected.
Specifically, the push-in determination unit 105 has a length of the determination time calculated by the time calculation unit 103 that is equal to or greater than a preset threshold value (hereinafter, referred to as “time determination threshold value”), and moves. It is determined whether or not the movement amount calculated by the amount calculation unit 104 is equal to or larger than a preset threshold value (hereinafter referred to as “push detection threshold value”).
The time determination threshold value is set in advance and stored in a location where the push-in determination unit 105 can refer to. As the time determination threshold value, for example, when the user performs a pressing operation on the touch panel 14, usually, a minimum value of the time assumed to be required until the pressing operation is completed is set.
Further, the push-in determination threshold value is set in advance and stored in a location where the push-in determination unit 105 can refer to. For the push-down determination threshold value, for example, the minimum value of the movement amount of the coil portion 20A that is assumed when the touch panel 14 is pushed in by the user performing the push-in operation of the touch panel 14 is set. Note that the user or the like can set or change the push-down determination threshold value as appropriate.

The push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is equal to or greater than the time determination threshold value, and that the movement amount calculated by the movement amount calculation unit 104 is equal to or greater than the push detection threshold value. When the determination is made, it is determined that the movement of the coil portion 20A, that is, the pressing of the touch panel 14 is due to the pressing operation, and the pressing operation is detected.

When the push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is shorter than the time determination threshold value or the movement amount calculated by the movement amount calculation unit 104 is smaller than the push-in detection threshold value. Determines that the movement of the coil portion 20A, that is, the pressing on the touch panel 14, is not due to the pressing operation. That is, the push-in determination unit 105 does not detect the push-in operation.
When the push-in determination unit 105 detects a push-in operation, the push-in determination unit 105 outputs the push-in detection information that notifies that the push-in operation is detected to the output unit 106.

7A to 7C describe an image of whether or not the pressing of the touch panel 14 is performed by the pressing operation, which is performed by the pressing determination unit 105 based on the determination time and the movement amount in the first embodiment. FIG.
FIG. 7A shows an image of the determination time and the change in the moving speed during the determination time when the touch panel 14 is pressed by the touch operation. FIG. 7B and FIG. 7C show an image of the judgment time and the change in the moving speed during the judgment time when the touch panel 14 is pressed not by the pressing operation.
When the user performs a pushing operation, the movement amount calculated from the movement speed in the determination time is as shown in FIG. 7A, for example. In FIG. 7A, the determination time is represented by 701a, and the movement amount in the determination time is represented by the area of the graphic 701b.
When the user performs the pushing operation, the movement amount is estimated to be equal to or more than the pushing determination threshold value. In other words, it is estimated that the length of the determination time 701a is equal to or greater than the time determination threshold and the area of the graphic 701b is equal to or greater than the indentation determination threshold.
The push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is equal to or greater than the time determination threshold value, and that the movement amount calculated by the movement amount calculation unit 104 is equal to or greater than the push detection threshold value. By detecting the pushing operation based on the determination of, it is possible to prevent erroneous detection of the pushing operation.

On the other hand, for example, although the touch panel 14 is pushed, it is assumed that the pushing is not caused by the pushing operation but is caused by the vibration of the vehicle or the like which is not intended by the user. At this time, for example, if the vehicle vibrates due to the shape of the road surface, and a state in which something touches the touch panel 14 with a weak load continues for a certain period of time, the determination time and the moving speed at the determination time are The change relationship can be as shown in FIG. 7B. In FIG. 7B, the determination time is represented by 702a, and the movement amount in the determination time is represented by the area of the graphic 702b.
For example, when the state where something touches the touch panel 14 with a weak load continues for a long time as described above, the determination time may be equal to or longer than the time determination threshold value. However, it is estimated that the vibration or the like of the vehicle is the depression of the touch panel 14 which is not intended by the user, and the touch panel 14 is not pushed to the innermost position within the range in which the touch panel 14 can move. Therefore, the movement amount at this time is estimated to be smaller than the push-in determination threshold value. In other words, even if an event occurs in which the length of the determination time 702a is equal to or longer than the time determination threshold value, the area of the figure 702b is estimated to be smaller than the indentation determination threshold value.
The push-in determination unit 105 determines that the movement amount calculated by the movement amount calculation unit 104 is smaller than the push-in detection threshold value, even if the length of the determination time period calculated by the time calculation unit 103 is equal to or longer than the time determination threshold value. Based on this, it is possible to prevent the user from unintentionally pressing the touch panel 14 as a pressing operation by determining that the pressing of the touch panel 14 is not a pressing operation.

Note that, for example, even if the user does not intend to press the touch panel 14 due to vibration of the vehicle or the like, the touch panel 14 may be pushed to the deepest position in the movable range, which is not inconceivable.
For example, when the user suddenly unintentionally applies a large load to the touch panel 14 due to sudden braking of the vehicle or the like, the touch panel 14 is pushed to the innermost position within a range in which the touch panel 14 can move. It is also possible that In this case, the relationship between the determination time and the change in the moving speed during the determination time can be as shown in FIG. 7C. In FIG. 7C, the determination time is represented by 703a, and the movement amount in the determination time is represented by the area of the graphic 703b.
For example, if there is a push-in that is not intended by the user due to the sudden braking of the vehicle as described above, the movement amount may be equal to or greater than the push-in determination threshold value. However, since the push that the user does not intend is a moment, it is estimated that the determination time at the time of the push is also a moment. In other words, the length of the determination time 703a is estimated to be shorter than the time determination threshold even if an event occurs in which the area of the graphic 703b becomes equal to or greater than the indentation determination threshold.
The push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is smaller than the time determination threshold even if the movement amount calculated by the movement amount calculation unit 104 is equal to or larger than the push-in detection threshold. Based on this, by determining that the pressing of the touch panel 14 is not a pressing operation, it is possible to prevent the pressing of the touch panel 14 not intended by the user from being erroneously detected as a pressing operation.

When the push detection information is output from the push determination unit 105, the output unit 106 outputs the push detection information to a control device (not shown) included in the electronic device 1000, for example.

The operation of the indentation detection device 100 according to the first embodiment will be described.
FIG. 8 is a flowchart for explaining the operation of the push-in detection device 100 according to the first embodiment.
The electromotive force acquisition unit 101 acquires information on the electromotive force generated in the coil 23 measured by the voltage measurement circuit 28 (step ST801).
The electromotive force acquisition unit 101 outputs the acquired electromotive force information to the moving speed calculation unit 102.

The moving speed calculating unit 102 calculates the moving speed of the coil unit 20A when the touch panel 14 is pressed from the information on the electromotive force acquired by the electromotive force acquiring unit 101 in step ST801 (step ST802).
The moving speed calculation unit 102 associates the calculated moving speed information with the information on the time when the moving speed is calculated, and temporarily stores the calculated moving speed information in at least a location where the time calculating unit 103 and the moving amount calculating unit 104 can refer to. Remember.

The time calculation unit 103 detects, based on the moving speed calculated by the moving speed calculating unit 102 in step ST802, whether or not the moving speed becomes zero and then zero again (step ST803).
In step ST803, when the time calculation unit 103 does not detect that the moving speed becomes greater than zero and then becomes zero again (in the case of “NO” in step ST803), the process returns to step ST801.
In step ST803, when the time calculation unit 103 detects that the moving speed becomes greater than zero and then becomes zero again (in the case of “YES” in step ST803), the time calculation unit 103 determines the determination time. Is calculated, and information on the calculated determination time is output to the push-in determination unit 105.
Further, the time calculation unit 103 outputs a determination time elapsed notification indicating that the determination time has elapsed to the movement amount calculation unit 104.

When the determination time elapse notification is output from the time calculation unit 103 in step ST803, the movement amount calculation unit 104 sets the movement speed calculated by the movement speed calculation unit 102 in step ST802 to the time calculation unit in step ST803. The determination time calculated by 103 is integrated to calculate the movement amount of the coil unit 20A during the determination time (step ST804).
The movement amount calculation unit 104 outputs information on the calculated movement amount to the push-in determination unit 105.

The push-in determination unit 105 determines that the push-in generated on the touch panel 14 is due to the push-in operation based on the determination time calculated by the time calculation unit 103 in step ST803 and the movement amount calculated by the movement amount calculation unit 104 in step ST804. It is determined whether or not it is a push. Specifically, the push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is greater than or equal to the time determination threshold value, and the movement amount calculated by the movement amount calculation unit 104 is for the push-in detection. It is determined whether it is equal to or more than the threshold value (step ST805).

In step ST805, the push-in determination unit 105 determines that the determination time length calculated by the time calculation unit 103 is shorter than the time determination threshold value, or the movement amount calculated by the movement amount calculation unit 104 is smaller than the push-in detection threshold value. If it is determined that (NO in step ST805), the push-in determination unit 105 determines that the push on the touch panel 14 is not a push operation, and the process returns to step ST801.

In step ST805, the push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is equal to or longer than the time determination threshold value, and the movement amount calculated by the movement amount calculation unit 104 is the push-in detection threshold value. When it is determined that the above is the case (in the case of “YES” in step ST805), the push-in determination unit 105 determines that the push-down of the touch panel 14 is due to the push-in operation, and detects the push-in operation (step ST806). Then, the push-in determination unit 105 outputs the push-in detection information to the output unit 106.

When the push-in determination unit 105 detects the push-in operation and the push-in detection information is output in step ST806, the output unit 106 outputs the push-in detection information to, for example, a control device (not shown) included in the electronic device 1000. After that, the push-in detection device 100 returns to step ST801.

As described above, in the push-in detection device 100, the moving speed of the coil part 20A when the coil part 20A is calculated based on the electromotive force generated in the coil part 20A along with the movement of the coil part 20A is greater than zero. The time from when it becomes large to when it becomes zero again is calculated as the judgment time. Then, the push-in detection device 100 integrates the moving speed of the coil portion 20A for the determination time, and calculates the amount of movement of the coil portion 20A during the determination time. The push-in detection device 100 determines the presence/absence of a push-in operation using the determination time and the movement amount. Therefore, the push-in detection device 100 can prevent erroneous detection of the push-in operation of the touch panel 14 in the electronic device 1000.

Further, in the push-in detection device 100, the voice coil actuator 20 has a function of vibrating the touch panel 14 and a function of detecting the push-in of the touch panel 14. Therefore, the electronic device 1000 integrates the actuator and the sensor by using the voice coil actuator 20 without separately requiring an actuator that vibrates the touch panel 14 and a sensor that detects pressing of the touch panel 14. You can As a result, the electronic device 1000 can realize downsizing or cost reduction as compared with a device that separately requires an actuator that vibrates the touch panel 14 and a sensor that detects pressing of the touch panel.

Further, in the conventional input device represented by Patent Document 1 described above, for example, the voice coil is fixed to the touch panel, while the magnetic circuit is supported by the touch panel via the suspension. Therefore, in the conventional input device, the relative movement between the voice coil and the magnetic circuit occurs only momentarily even when the user presses the touch panel. This means that in the input device of the related art, the electromotive force of the voice coil due to the pressing operation is generated only momentarily.
On the other hand, in the electronic device 1000 according to the first embodiment, the coil portion 20A is fixed to the touch panel 14 and the magnetic circuit portion 20B is fixed to the main body housing 13. In addition, the electronic device 1000 has a configuration in which the touch panel 14 and the coil unit 20</b>A move relative to the main body housing 13 when the user presses the touch panel 14. With this configuration, in the electronic device 1000, the coil unit 20A and the magnetic circuit unit 20B are in a state of relative movement from the initial position at least while the user is performing a pressing operation on the touch panel 14. This means that in the electronic device 1000, the electromotive force of the coil 23 due to the pushing operation is generated for a longer time than in the conventional technique. Therefore, the indentation detection device 100 according to the first embodiment uses the electromotive force generated in the coil 23 for a relatively long time while the touch panel 14 of the electronic device 1000 is indented to determine whether or not the indentation operation is performed. You can As a result, the push-in detection device 100 does not detect the push-in of the touch panel 14 caused by the user's unintentional touching the touch panel 14, such as vibration of the vehicle, without detecting the push-in operation of the touch panel 14 as an electronic device. It is possible to prevent erroneous detection of the pressing operation of the touch panel 14 in 1000.

Although electronic device 1000 includes only one voice coil actuator 20 in the first embodiment described above, this is merely an example. For example, when the electronic device 1000 is a large-screen electronic device 1000, the electronic device 1000 may include a plurality of voice coil actuators 20.
For example, the voice coil actuator 20 may be provided corresponding to both left and right peripheral portions of the rear surface of the touch panel 14, or in addition to this, it may be provided at both upper and lower peripheral portions of the rear surface of the touch panel 14. Good. Further, the voice coil actuator 20 may be provided corresponding to only the upper and lower peripheral portions on the rear surface of the touch panel 14. The number of voice coil actuators 20 and the number of voice coil actuators 20 can be adjusted as appropriate.

FIG. 9 is a diagram showing a configuration example of an electronic device 1000a including a plurality of voice coil actuators 20 in the first embodiment. 9 is a front view of the electronic device 1000a. The electronic device 1000a shown in FIG. 9 differs from the electronic device 1000 shown in FIG. 1 in that a plurality of voice coil actuators 20 are provided.
As an example, the electronic device 1000a shown in FIG. 9 includes the voice coil actuators 20 at the four corners of the peripheral portion of the rear surface of the touch panel 14. That is, the electronic device 1000a shown in FIG. 9 includes four voice coil actuators 20, that is, the first voice coil actuator 20a, the second voice coil actuator 20b, the third voice coil actuator 20c, and the fourth voice coil actuator 20d. ing. When the electronic device 1000a includes a plurality of voice coil actuators 20, the movement amount of the coil portion 20A of each voice coil actuator 20 calculated by the push detection device 100 differs depending on the push position of the touch panel 14.

Here, the amount of movement of the coil portion 20A of each voice coil actuator 20, which varies depending on the pressing position of the touch panel 14, will be specifically described.
10A and 10B show that in the first embodiment, when the electronic device 1000a is the electronic device 1000a as shown in FIG. 9 and the touch panel 14 is pressed at the pressing position 901, the pressing detection device 100 is It is a figure for demonstrating the image of the movement amount for determinations to calculate.
FIG. 10A shows a case where when the pressing of the touch panel 14 occurs at the pressing position 901, the moving speed of the coil part 20A of the first voice coil actuator 20a becomes greater than zero and then becomes zero again. It shows an image of the amount of movement of. FIG. 10B shows the coil portion 20A from when the moving speed of the coil portion 20A of the fourth voice coil actuator 20d is greater than zero to when it is zero again when the touch panel 14 is pushed at the pushing position 901. It shows an image of the amount of movement of.
In FIG. 10A, the movement amount is represented by the area of the graphic 1001. In FIG. 10B, the movement amount is represented by the area of the graphic 1002.
The first voice coil actuator 20a is closer to the pushing position 901 than the fourth voice coil actuator 20d. Therefore, as shown in FIGS. 10A and 10B, the movement amount of the coil portion 20A in the first voice coil actuator 20a is larger than the movement amount of the coil portion 20A in the fourth voice coil actuator 20d.
In this way, the amount of movement of the coil portion 20A of each voice coil actuator 20 calculated by the push-in detection device 100 when the push-in occurs on the touch panel 14 differs depending on the push-in position on the touch panel 14.

Therefore, in the push-in detection device 100, the push-in determination unit 105 uses the push-in determination threshold value set according to the push-in position of the touch panel 14 for each voice coil actuator 20 to push the touch panel 14 by a push operation. It is determined whether or not In addition, the pressing position of the touch panel 14 can be detected by using a normal function of the touch panel 14. The push-in detection device 100 may acquire the push-in position information from the touch panel 14.
The push-in determination unit 105 sets a push-down determination threshold value for the voice coil actuator 20 according to the distance to the push-in position of the touch panel 14.
A specific value of the push-in determination threshold value with respect to each distance between the push-in position and the voice coil actuator 20 is predetermined. The relationship between the two is set such that the smaller the distance between the pushing position and the voice coil actuator 20, the larger the pushing determination threshold value.

In the push-in detection device 100, the push-in determination unit 105 uses the push-in determination thresholds set for the respective voice coil actuators 20 when comparing the movement amount with the push-in determination thresholds. Compare with. For example, the push-in determination unit 105 does not push the touch panel 14 when the determination time is equal to or longer than the time determination threshold and the movement amount is equal to or greater than the push determination threshold in all of the voice coil actuators 20. It is determined to be due to the pushing operation. In addition, for example, the push-in determination unit 105 determines that the determination time is equal to or longer than the time determination threshold value and the movement amount is the push-in determination threshold value in more than half of all the voice coil actuators 20. In the above case, the pressing of the touch panel 14 may be determined to be a pressing operation.
Also, in the above example, the push-in determination unit 105 compares the movement amount calculated by all the voice coil actuators 20 with the push-in determination threshold value in order to detect the push-in by the push-in operation. But this is just one example. The push-in determination unit 105 determines whether or not the push-in is performed by a touch operation based on the movement amount calculated by one, two, or three voice coil actuators 20 of the four voice coil actuators 20. May be determined.

As described above, in the push-in detection device 100 according to the first embodiment, even when the electronic device 1000a includes the plurality of voice coil actuators 20, the push-in determination set according to the distance between each voice coil actuator 20 and the push-in position. By using the operation threshold value to determine whether or not the pressing operation that has occurred on the touch panel 14 is due to a pressing operation, it is possible to prevent erroneous detection of the pressing operation.
Therefore, the push-in detection device 100 can appropriately determine whether or not the push-in generated on the touch panel 14 is due to a push-in operation even in the large-screen electronic device 1000a, for example.

Even when the electronic device 1000 includes only one voice coil actuator 20 as illustrated in FIG. 1, the coil unit 20</b>A calculated by the indentation detection device 100 according to the indentation position of the touch panel 14 is displayed. The amount of movement may vary.
Therefore, also in the electronic device 1000 as shown in FIG. 1, the push-in determination unit 105 may set the push-in determination threshold value according to the distance between the voice coil actuator 20 and the push-in position of the touch panel 14.

Further, in the first embodiment described above, it is assumed that the push-in detection device 100 is provided in the electronic device 1000, but the push-in detection device 100 is provided outside the electronic device 1000 and includes the electronic device 1000 and the network. It may be connected via.
Further, in the above-described first embodiment, electronic device 1000 is an in-vehicle device, but the present invention is not limited to this. The electronic device 1000 may be any device that includes a touch panel.

11A and 11B are diagrams showing an example of the hardware configuration of the push-in detection device 100 according to the first embodiment.
In the first embodiment, the functions of the electromotive force acquisition unit 101, the movement speed calculation unit 102, the time calculation unit 103, the movement amount calculation unit 104, the push-in determination unit 105, and the output unit 106 are performed by the processing circuit 1101. Will be realized. That is, the push-in detection device 100 includes the processing circuit 1101 for performing control to determine whether the push-in of the touch panel 14 is a push-in operation by the user.
The processing circuit 1101 may be dedicated hardware as shown in FIG. 11A, or may be a CPU (Central Processing Unit) 1105 that executes a program stored in the memory 1106 as shown in FIG. 11B.

When the processing circuit 1101 is dedicated hardware, the processing circuit 1101 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable). Gate Array) or a combination of these is applicable.

When the processing circuit 1101 is the CPU 1105, the functions of the electromotive force acquisition unit 101, the movement speed calculation unit 102, the time calculation unit 103, the movement amount calculation unit 104, the push determination unit 105, and the output unit 106 are software, It is realized by firmware or a combination of software and firmware. That is, the electromotive force acquisition unit 101, the moving speed calculation unit 102, the time calculation unit 103, the movement amount calculation unit 104, the push-down determination unit 105, and the output unit 106 include an HDD (Hard Disk Drive) 1102 and a memory 1106. And a processing circuit such as a system LSI (Large-Scale Integration) that executes a program stored in the computer. Further, the programs stored in the HDD 1102, the memory 1106, etc., include an electromotive force acquisition unit 101, a moving speed calculation unit 102, a time calculation unit 103, a movement amount calculation unit 104, a push determination unit 105, and an output unit 106. It can also be said that it causes a computer to execute the procedure or method. Here, the memory 1106 is, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Omni-Memory), or an EEPROM (Electrically Organizable). Volatile or volatile semiconductor memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), etc. are applicable.

Some of the functions of the electromotive force acquisition unit 101, the movement speed calculation unit 102, the time calculation unit 103, the movement amount calculation unit 104, the push-in determination unit 105, and the output unit 106 are dedicated hardware. It may be realized, and a part may be realized by software or firmware. For example, regarding the electromotive force acquisition unit 101 and the output unit 106, the function thereof is realized by the processing circuit 1101 as dedicated hardware, and the movement speed calculation unit 102, the time calculation unit 103, the movement amount calculation unit 104, and the push-in unit. The function of the determination unit 105 can be realized by the processing circuit reading and executing the program stored in the memory 1106.
The push-in detection device 100 also includes an input interface device 1103 and an output interface device 1104 that perform wired communication or wireless communication with devices such as the

electronic devices

1000 and 1000a.

As described above, the indentation detection device 100 according to the first embodiment calculates the moving speed of the coil part 20A when the coil part 20A moves based on the electromotive force generated by the movement of the coil part 20A. The moving speed calculating unit 102 calculates the calculating unit 102, the time calculating unit 103 that calculates the time from when the moving speed calculated by the moving speed calculating unit 102 becomes greater than zero to when the moving speed becomes zero again as the determination time. A movement amount calculation unit 104 that integrates the moving speed for the determination time calculated by the time calculation unit 103 to calculate the movement amount of the coil unit 20A in the determination time, and the determination time calculated by the time calculation unit 103. And a push-down determination unit 105 that determines whether or not a push-in operation is performed based on the movement amount calculated by the movement amount calculation unit 104. Therefore, the push-in detection device 100 can prevent erroneous detection of the push-in operation on the touch panel.

In the push-in detection device 100 according to the first embodiment, the push-in determination unit 105 determines that the length of the determination time calculated by the time calculation unit 103 is equal to or greater than the time determination threshold value, and the movement amount calculation unit 104 calculates When the amount of movement is equal to or greater than the push-in detection threshold, it is determined that the movement of the coil unit 20A is a push-in operation, and the length of the determination time calculated by the time calculation unit 103 is shorter than the time determination threshold, or When the movement amount calculated by the movement amount calculation unit 104 is smaller than the push-in detection threshold value, the movement of the coil unit 20A is determined not to be the push-in operation. The push-in detection device 100 can prevent the false detection of the push-in operation by not detecting the push-in of the touch panel 14 which is estimated not to be intended by the user as the push-in by the push-in operation.

Note that, in the present invention, within the scope of the invention, it is possible to modify any constituent element of the embodiment or omit any constituent element of the embodiment.

Since the touch-panel press-down detection device according to the present invention is configured to prevent erroneous detection of the touch-panel press-down operation, the touch-panel press-down detection for detecting the press-down operation on the touch panel in an electronic device that vibrates the touch panel is supported. It can be applied to a detection device.

11 front side design panel, 11a opening, 12 back side design panel, 13 main body case, 13a through hole, 14 touch panel, 14a operation surface, 15 liquid crystal panel, 16 springs, 17, 18 screws, 20 voice coil actuator, 20a 1st voice coil actuator, 20b 2nd voice coil actuator, 20c 3rd voice coil actuator, 20d 4th voice coil actuator, 20A coil part, 20B magnetic circuit part, 21 pusher, 22 coil bobbin, 23 coil, 24 yoke, 25 Pole, 26 magnet, 27 magnetic gap, 28 voltage measurement circuit, 51 vehicle panel, 52 mounting plate, 53 vehicle side fixed part, 100 indentation detection device, 101 electromotive force acquisition part, 102 moving speed calculation part, 103 time calculation part, 104 movement amount calculation unit, 105 push-in determination unit, 106 output unit, 1000, 1000a electronic device.

Claims

A touch panel, a main body housing, a voice coil actuator for vibrating the touch panel, the voice coil actuator having a coil portion fixed to the touch panel and a magnetic circuit portion fixed to the main body housing, the touch panel and the coil A push-in detection device for the touch panel for detecting the push-in operation with respect to the touch panel, in an electronic device in which a unit moves relative to the main body housing by a push-in operation with respect to the touch panel,
A moving speed calculation unit that calculates a moving speed of the coil unit when the coil unit moves, based on an electromotive force generated along with the movement of the coil unit,
A time calculation unit that calculates the time from when the moving speed calculated by the moving speed calculation unit is greater than zero until it becomes zero again as a determination time,
A moving amount calculation unit that integrates the moving speed calculated by the moving speed calculation unit for the determination time calculated by the time calculation unit, and calculates the moving amount of the coil unit at the determination time,
A push-in detection device for a touch panel, comprising: a push-in determination unit that determines whether or not the push-in operation is performed based on the determination time calculated by the time calculation unit and the movement amount calculated by the movement amount calculation unit.
The indentation determination unit,
When the length of the determination time calculated by the time calculation unit is a time determination threshold value or more, and the movement amount calculated by the movement amount calculation unit is not less than the indentation detection threshold value, the coil unit It is determined that the movement is the pushing operation,
If the length of the determination time calculated by the time calculation unit is shorter than the time determination threshold value, or if the movement amount calculated by the movement amount calculation unit is smaller than the push-in detection threshold value, the movement of the coil unit is the The push-in detection device for a touch panel according to claim 1, wherein it is determined that the push-in operation is not performed.
The electronic device includes a plurality of the voice coil actuators,
The indentation detection threshold value is set for each of the plurality of voice coil actuators, according to a distance between the plurality of voice coil actuators and a position of the indentation operation with respect to the touch panel. The indentation detection device for the touch panel according to 2.
A push-in detection device for a touch panel according to any one of claims 1 to 3,
The touch panel,
The main body casing;
An electronic device comprising the voice coil actuator.
A touch panel, a main body housing, a voice coil actuator for vibrating the touch panel, the voice coil actuator having a coil portion fixed to the touch panel and a magnetic circuit portion fixed to the main body housing, the touch panel and the coil A push-in detection method for the touch panel for detecting the push-in operation on the touch panel in an electronic device in which a unit moves relative to the main body housing by a push-in operation on the touch panel,
A moving speed calculation unit, based on an electromotive force generated with the movement of the coil unit, a step of calculating the moving speed of the coil unit when the coil unit moves,
A step in which the time calculation unit calculates, as a determination time, a time period from when the movement speed calculated by the movement speed calculation unit becomes greater than zero until it becomes zero again,
A moving amount calculation unit, a moving speed calculated by the moving speed calculation unit, integrating for the determination time calculated by the time calculation unit, a step of calculating the movement amount of the coil unit in the determination time,
A push-in detection method for a touch panel, comprising: a push-in determination unit that determines whether or not the push-in operation is performed based on the determination time calculated by the time calculation unit and the movement amount calculated by the movement amount calculation unit.