JP2017129916A - Input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an input device that allows oscillation feedback closer to click feeling of a mechanical switch to be performed.SOLUTION: A tactile presentation device comprises a control unit that controls an oscillation actuator on the basis of a waveform pattern 600 including, after judging pushing accompanied by a push operation, a first waveform pattern 601 upward oscillating an operation surface so as to add a first pressure 601a to an operation finger, a second waveform pattern 602 relaxing the first pressure 601a added to the operation finger, and then causing the operation surface to be continuously oscillated upward and downward so as to add a second pressure 602b, and a third waveform pattern 603 causing the operation surface to be alternately oscillated upward and downward as causing the oscillation to be attenuated; and a reverse waveform pattern 605 reversing the waveform pattern 600 after judging a pushing back accompanied by the push operation, and presents oscillation feedback.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an input device.

  As conventional techniques, a touch operation unit including an operation surface that is input by a touch operation, an operation detection unit that detects a touch operation on the operation surface, an operation unit displacement unit that displaces the touch operation unit, and an operation detection unit There is known an operation input device including a displacement control unit that controls the displacement of the touch operation unit by driving the operation unit displacement unit when the touch operation is detected (see, for example, Patent Document 1). .)

  This operation input device executes acceleration application control for applying acceleration so that the touch operation unit has two peaks with different positive and negative when the displacement control unit drives and controls the operation unit displacement unit. The tactile feedback close to the tactile sensation received from the mechanical switch can be generated.

Japanese Patent Laying-Open No. 2015-11376

  The objective of this invention is providing the input device which can perform the vibration feedback nearer to the operation feeling of a mechanical switch.

  One embodiment of the present invention adds an input detection unit that detects an input made on an operation surface by an operation finger, a pressure detection unit that detects a pressure applied to the operation surface in accordance with the input, and a vibration to the operation surface. A first waveform pattern that causes the operation surface to vibrate upward so as to apply the first pressure to the operation finger after determining the push accompanying the push operation based on the vibration adding unit and the detected pressure. A second waveform pattern that vibrates the operation surface continuously downward and upward so as to relax the applied first pressure and then apply a second pressure, and the operation surface are alternately attenuated upward and downward. The vibration adding unit is controlled based on the waveform pattern having the third waveform pattern to be vibrated and the reversed waveform pattern obtained by inverting the waveform pattern after determining the pushback associated with the push operation based on the detected pressure. A control unit for presenting vibration feedback and to provide an input device including an.

  According to the present invention, vibration feedback closer to the operational feeling of a mechanical switch can be performed.

FIG. 1A is a schematic diagram of the interior of the vehicle showing an example of mounting the tactile presentation device according to the first embodiment, and FIG. 1B is an example of a block diagram of the tactile presentation device. FIG. 2 is a graph showing an example of a waveform pattern and an inverted waveform pattern of the tactile sense presentation device according to the first embodiment. FIG. 3A is a graph showing an example of the vibration of the operating finger when a push operation is performed on the mechanical switch, and FIG. 3B is surrounded by a dotted line on the left side in FIG. It is the graph which expanded the area | region. FIG. 4 is a flowchart illustrating an example of the operation of the tactile sense presentation device according to the first embodiment. FIG. 5 is an example of a block diagram of the tactile sense presentation device according to the second embodiment. FIG. 6 is a flowchart illustrating an example of the operation of the tactile sensation providing apparatus according to the second embodiment.

(Summary of embodiment)
An input device according to an embodiment includes an input detection unit that detects an input made on an operation surface by an operation finger, a pressure detection unit that detects a pressure applied to the operation surface in accordance with the input, and vibrations on the operation surface. A first waveform pattern that causes the operation surface to vibrate upward so as to apply the first pressure to the operating finger after determining the push accompanying the push operation based on the detected pressure and the vibration applying unit to be applied A second waveform pattern that vibrates the operation surface continuously downward and upward to relieve the first pressure applied to the finger and then apply a second pressure, and the operation surface alternately upward and downward Vibration based on a waveform pattern having a third waveform pattern to be oscillated while being attenuated, and an inverted waveform pattern obtained by inverting the waveform pattern after determining the pushback associated with the push operation based on the detected pressure It is schematically configured to include a control unit that presents a control to vibrate feedback pressurized portion.

  Since this input device adds vibration to the operation surface based on a waveform pattern imitating the operation feeling (click feeling) of the mechanical switch and the inverted waveform pattern, vibration feedback closer to the operation feeling of the mechanical switch can be performed. .

[First embodiment]
(Outline of the tactile presentation device 1)
FIG. 1A is a schematic diagram of the interior of the vehicle showing an example of mounting the tactile presentation device according to the first embodiment, and FIG. 1B is an example of a block diagram of the tactile presentation device. FIG. 2 is a graph showing an example of a waveform pattern and an inverted waveform pattern of the tactile sense presentation device according to the first embodiment. 2, the vertical axis represents the amplitude X of the driving signal S _3, the horizontal axis is the time (s). Note that, in each drawing according to the embodiment described below, the ratio between figures may be different from the actual ratio. In FIG. 1B and FIG. 5 to be described later, the flow of main signals and information is indicated by arrows. Furthermore, “A to B” indicating a numerical range is used in the meaning of A or more and B or less.

  The tactile sense presentation device 1 as an input device is disposed on a floor console 91 that extends between a driver seat and a passenger seat of the vehicle 9, for example, as shown in FIG. The tactile sense presentation device 1 is configured to be able to give instructions such as movement and selection of a cursor displayed on the display device 95 arranged on the center console 92, selection of an icon displayed, determination, dragging, and dropping. Has been.

  As shown in FIG. 1B, the tactile sense presenting device 1 is applied to the operation surface 20 with the touchpad 2 as an input detection unit that detects an input made on the operation surface 20 by the operation finger 8 and the input. The pressure sensor 3 as a pressure detection unit that detects the detected pressure and the vibration actuator 4 as a vibration addition unit that adds vibration to the operation surface 20 are schematically configured.

  In addition, as shown in FIG. 2, the tactile sense presentation device 1 determines whether or not the push operation is performed based on the detected pressure, and then moves the operation surface 20 upward so as to apply the first pressure 601 a to the operation finger 8. The first waveform pattern 601 to be vibrated in the first direction, the first pressure 601a applied to the operation finger 8 is relaxed, and the operation surface 20 is subsequently vibrated downward and upward so as to apply the second pressure 602b. 2 and the waveform pattern 600 having the third waveform pattern 603 that vibrates while alternately damping the operation surface 20 upward and downward, and the detected pressure, the push-back associated with the push operation is determined. Thereafter, the control unit 6 presents vibration feedback by controlling the vibration actuator 4 based on the inverted waveform pattern 605 obtained by inverting the waveform pattern 600. It is schematically configured with a.

This vibration feedback gives the operating finger a feeling of operation of the mechanical switch, mainly a feeling of clicking. Note Figure 2 is a graph of the driving signal S ₃ in correspondence to the amplitude illustrates an example of a pressure at which the operation surface 20 provided to the operation finger 8.

(Configuration of touchpad 2)
The touch pad 2 is a sensor that detects the position on the touched operation surface 20 by, for example, touching the operation surface 20 with a part of the operator's body (for example, an operation finger) or a dedicated pen. For example, the operator can operate the connected electronic device by operating the operation surface 20. As the touch pad 2, for example, a resistance film type or electrostatic capacity type sensor can be used. The touch pad 2 of the present embodiment is, for example, a capacitive touch sensor. The touch pad 2 detects, for example, a touch operation or a tracing operation.

  A plurality of intersecting detection electrodes are arranged below the operation surface 20. That is, the touch pad 2 has a multilayer structure in which the detection electrodes are sandwiched between plate-like members.

Touch pad 2 is set a two-dimensional coordinate system on the operation surface 20, the operating finger outputs the detected information S ₁ is information about coordinates of the two-dimensional coordinate system, detected in the control unit 6. The detection information S ₁ is output in accordance with a period for scanning a plurality of detection electrodes. The detection information S _1, when detecting the operation finger includes coordinate information.

(Configuration of pressure sensor 3)
The pressure sensor 3 is, for example, a sheet type sensor, and is disposed on the back surface 21 side of the touch pad 2. The pressure sensor 3 outputs to the control unit 6 detects the pressure added to the operation surface 20 as the pressure information S _2.

  This pressure is positive in the direction in which the operation surface 20 is pushed. Therefore, for example, as shown in FIG. 1B, the pressure sensor 3 detects a positive pressure when the operation surface 20 moves upward while the operation finger 8 is in contact with the operation surface 20.

(Configuration of vibration actuator 4)
The vibration actuator 4 is schematically configured by an actuator such as a motor, a voice coil motor, and a piezoelectric element, for example. As an example, the vibration actuator 4 of the present embodiment is a voice coil motor.

The vibration actuator 4 is disposed between the main body of the tactile sense presentation device 1 and the touch pad 2, for example. The vibration actuator 4 vibrates the operation surface 20 based on the drive signal S ₃ output from the control unit 6. The direction of this vibration is such that the normal direction of the operation surface 20 is upward and the normal direction of the back surface 21 is downward, with no vibration being applied as a reference state. That is, when the dotted line shown in FIG. 1B is the height of the operation surface 20 in the reference state, the upward arrow direction is upward, and the downward arrow direction is downward.

(Configuration of control unit 6)
The control unit 6 includes, for example, a CPU (Central Processing Unit) that performs operations and processes on acquired data according to a stored program, a RAM (Random Access Memory) that is a semiconductor memory, a ROM (Read Only Memory), and the like. Microcomputer. In this ROM, for example, a program for operating the control unit 6, waveform pattern information 60, and threshold information 61 are stored. For example, the RAM is used as a storage area for temporarily storing calculation results and the like.

The waveform pattern information 60 is information regarding the waveform pattern 600 and the inverted waveform pattern 605. Control unit 6 generates a drive signal S ₃ on the basis of the waveform pattern information 60.

  The threshold information 61 is a threshold related to pressure. The threshold value relating to the pressure is a threshold value for determining whether to push in and push back in accordance with the push operation. Pushing is an initial operation of the push operation, and is an operation in which the operator pushes the button against the elastic force of the mechanical switch. Push-back is a later operation of the push operation, and is an operation that is pushed back by the elastic force of the mechanical switch when the operator loosens the operation force to push in to release the contact with the operation surface 20 after finishing the push operation. .

Control unit 6 judges push back the pushing on the basis of the pressure information S ₂ and threshold information 61 acquired from the pressure sensor 3. The pushing is determined that the detected pressure is equal to or higher than the first threshold value based on the threshold information 61. Push-back is determined that the detected pressure is equal to or lower than the second threshold value based on the threshold value information 61.

Control unit 6 outputs the electronic device operation is connected to generate operation information S ₅ which is information of the detected coordinates on the basis of the detection information S ₁ acquired from the touch pad 2.

(Regarding the waveform pattern 600 and the inverted waveform pattern 605)
FIG. 3A is a graph showing an example of the vibration of the operating finger when a push operation is performed on the mechanical switch, and FIG. 3B is surrounded by a dotted line on the left side in FIG. It is the graph which expanded the area | region. In FIG. 3A and FIG. 3B, the vertical axis represents the amplitude of vibration received by the operating finger, and the horizontal axis represents time t (s).

  FIGS. 3A and 3B are graphs showing how the operating finger vibrates in response to a reaction force from the mechanical switch when the mechanical switch is actually operated. A region surrounded by a dotted line on the left side of the paper surface of FIG. 3A indicates a region when the push operation is performed.

Time t ₁ to time t ₂ shown in FIG. 3B is a pressure application period, and is a first period in which the operation surface is pushed by the operation finger. Time t ₂ to time t ₃ is a second period in which pressure is applied after the pressure is relaxed. Time t ₃ to time t ₄ is a third period in which pressure is added while decaying.

  It is considered that the operator feels a click feeling of the mechanical switch due to the pressure received during the first period to the third period.

  Further, a region surrounded by a dotted line on the right side in the drawing of FIG. 3A indicates a region at the time of pushing back accompanying the push operation. This push back has a shape in which the waveform of the push is inverted. Therefore, the tactile sense presentation device 1 can present a click feeling close to that of an actual mechanical switch by vibrating the operation surface 20 based on the waveform at the time of pressing and the inverted waveform obtained by inverting this waveform.

This first period corresponds to time t ₀ to time t ₁₁ in FIG. 2, and a pattern simulating the waveform of this period is a first waveform pattern 601. The second period corresponds to time t ₁₁ to time t ₁₂ , and a pattern imitating the waveform of this period is the second waveform pattern 602. The third period corresponds to time t ₁₂ to time t ₁₃ , and a pattern imitating the waveform of this period is the third waveform pattern 603.

Specifically, since the first waveform pattern 601 applies the first pressure 601a to the operation finger 8, the amplitude X becomes positive and the operation surface 20 moves upward. The first waveform pattern 601 is given by the following equation (1) as an example.
_{X A (t) = A 0} Sin (2πf A t + θ A) + A ··· (1)
A = A ₀ and θ _A are parameters for connection with the second waveform pattern 602.
2πf _A is a parameter that generates a stroke feeling of the mechanical switch. Longer feels longer strokes.
t ₁ = (1 / 4f _A )

Since the second waveform pattern 602 reduces the pressure to the relaxation pressure 602a that relaxes the first pressure 601a, the amplitude becomes negative and the operation surface 20 moves downward. Since the second waveform pattern 602 applies the second pressure 602b, the amplitude is positive and the operation surface 20 moves upward. The second waveform pattern 602 is given by the following equation (2) as an example.
X _B (t) = B ₀ Sin (2πf _B (t−t ₁ ) + θ _B ) + B (2)
B = A ₀ -B ₀ , θ _B are parameters for connecting to the third waveform pattern 603.
2πf _B produces a steep pressure change. When this f _B is large, a clear operational feeling can be obtained.
t ₂ = t ₁ + (1 / f _B )

Since the amplitude of the third waveform pattern 603 is zero while being attenuated from the second pressure 602b, the operation surface 20 alternately moves upward and downward. The third waveform pattern 603 is given by the following equation (3) as an example.
X _C (t) = C ₀ νexp [−β (t−t ₂ )] × Sin (2πf _C (t−t ₂ ) + θ _C ) + C ₁ exp [−κ (t−t ₂ )] + C. (3)
ν is a coefficient. Further, θ _C is a parameter for connecting to the second waveform pattern 603.
2πf _C generates residual vibration.
C = − (C ₀ ν + C ₁ −A ₀ )
Thus, the third waveform pattern 603 is a composite wave of the first half attenuation curve waveform and the second half attenuation vibration waveform of Equation (3).

Here, β is a parameter of 100 to 1000. In the present embodiment, as an example, β = 100.
κ is a parameter of 10-100. In the present embodiment, as an example, κ = 30.
Β and κ are parameters relating to the ease of attenuation of the third waveform pattern 603, and affect the operational feeling such as being hard or soft, and if it is large, the operational feeling becomes hard.
f _A is a parameter of 50 to 500 Hz. In this embodiment, as an example, the frequency is 100 Hz. This f _A affects the stroke feeling, and if it is small, a long stroke feeling is obtained.
f _B is a parameter of 100 to 1000 Hz. In this embodiment, it is 550 Hz as an example. This f _B makes the pressure increase and decrease steeply, affects the clear operation feeling, and if it is large, a clear operation feeling is obtained.
f _C is a parameter of 100 to 1000 Hz. In the present embodiment, it is 700 Hz as an example. This f _C generates residual vibration and affects the vibration feeling, and if it is small, the vibration feeling increases.

The waveform pattern 600 is set based on the above formulas (1) to (3). The inverted waveform pattern 605 is a waveform from time t ₁₄ to time t ₁₅ in FIG. 2, and X _A (t) to X _C (t) in Expressions (1) to (3) is −X _A (t). ~ -X _C (t) is set. Accordingly, as shown in FIG. 2, the first pressure 601a becomes a first reverse pressure 605a that is a negative pressure. Further, the relaxation pressure 602a becomes the second reversal pressure 605b. Further, the second pressure 602b becomes the third reversal pressure 605c. The damping pressure 603a becomes the increased pressure 605d.

  Below, an example of operation | movement of the tactile sense presentation apparatus 1 of this Embodiment is demonstrated according to the flowchart of FIG.

(Operation)
When the vehicle 9 is powered on, the control unit 6 of the tactile presentation device 1 acquires the detection information S ₁ from the touch pad 2 and the pressure information S ₂ from the pressure sensor 3. The control unit 6 determines that “Yes” in Step 1 is established, that is, an operation is detected based on the detection information S _1, and the pressure based on the pressure information S ₂ is equal to or greater than the threshold value regarding the pushing of the threshold information 61. If it is determined that pushing has been detected (Step 1: Yes), a drive signal S ₃ corresponding to the waveform pattern 600 is generated based on the waveform pattern information 60 and output to the vibration actuator 4 (Step 2). Vibration actuator 4 vibrates the operation surface 20 based on the drive signal S ₃ to be input.

The control unit 6 determines that “Yes” in step 3 is established, that is, an operation is detected based on the detection information S _1, and the pressure based on the pressure information S ₂ is equal to or less than a threshold value related to pushing back of the threshold information 61. If it pushes back is determined to have been detected (Step3: Yes), generates a drive signal _{S 3} corresponding to the inverted waveform patterns 605 and outputs the vibration actuator 4 based on the waveform pattern information 60 (Step4). Vibration actuator 4, based on the drive signal S ₃ to be input to vibrate the operation surface 20, and ends the vibration feedback for push operation in which a mechanical switch.

(Effects of the first embodiment)
The tactile sense presentation device 1 according to the present embodiment can perform vibration feedback that is closer to the operational feeling of the mechanical switch. Specifically, the tactile sensation presentation device 1 adds vibration based on the waveform pattern 600 and the inverted waveform pattern 605 simulating the operational feeling of the mechanical switch, particularly the click feeling, to the operational surface 20, so Close vibration feedback can be performed.

  Since the tactile sensation providing apparatus 1 generates the third waveform pattern 603 related to the residual vibration, the operation feeling of the mechanical switch is closer to that of the case where this configuration is not adopted. In addition, the tactile sensation providing apparatus 1 has a pattern in which the inverted waveform pattern 605 is inverted from the third waveform pattern 603, and thus is closer to the operational feeling of the mechanical switch than in the case where this configuration is not adopted.

[Second Embodiment]
The second embodiment is different from the first embodiment in that feedback control is performed so that the waveform pattern 600 and the inverted waveform pattern 605 are close to the actual vibration of the operation surface 20.

  FIG. 5 is an example of a block diagram of the tactile sense presentation device according to the second embodiment. In the embodiments described below, parts having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  As shown in FIG. 5, the tactile sense presentation device 1 includes a vibration measurement unit 5 that measures the vibration of the operation surface 20. The control unit 6 performs feedback control based on the vibration of the operation surface 20 measured by the vibration measurement unit 5 so that the operation surface 20 vibrates according to the waveform pattern 600 and the inverted waveform pattern 605.

As an example, the vibration measurement unit 5 is disposed in a main body that supports the touch pad 2 and measures vibration of the operation surface 20 through measurement of vibration of the main body. The oscillation measurement unit 5, for example, to measure the vibrations with a leather, and outputs the measurement information S ₄ based on the measured vibration to the control unit 6.

When the control unit 6 outputs the drive signal S ₃ corresponding to the waveform pattern information 60 and the vibration of the operation surface 20 starts, the measured vibration is generated based on the measurement information S ₄ output from the vibration measurement unit 5. The drive signal S ₃ is corrected so as to be close to the waveform pattern 600 and the inverted waveform pattern 605.

  Below, an example of operation | movement of the tactile sense presentation apparatus 1 of this Embodiment is demonstrated according to the flowchart of FIG.

(Operation)
When the vehicle 9 is powered on, the control unit 6 of the tactile presentation device 1 acquires the detection information S ₁ from the touch pad 2 and the pressure information S ₂ from the pressure sensor 3. The control unit 6 determines that “Yes” in step 10 is established, that is, an operation is detected based on the detection information S _1, and the pressure based on the pressure information S ₂ is equal to or higher than the threshold value regarding the pushing of the threshold information 61. When it becomes, it determines with pushing being detected (Step10: Yes).

Control unit 6 determines that the push is detected, measured from the vibration measuring unit 5 outputs the vibration actuator 4 generates the driving signal S ₃ corresponding to the waveform pattern 600 based on the waveform pattern information 60 information S ₄ acquires performs feedback control to correct the driving signal S ₃ to the vibration measured on the waveform pattern 600 is close to (Step11).

The control unit 6 determines that “Yes” in Step 12 is established, that is, an operation is detected based on the detection information S _1, and the pressure based on the pressure information S ₂ is equal to or less than a threshold value related to pushing back of the threshold information 61. When it becomes, it determines with pushing back having been detected (Step12: Yes).

If it is determined that the push-back is detected, the control unit 6 generates a drive signal S ₃ corresponding to the inverted waveform pattern 605 based on the waveform pattern information 60 and outputs the drive signal S ₃ to the vibration actuator 4 and the measurement information S from the vibration measurement unit 5. ₄ obtained by the feedback control to correct the driving signal S ₃ to the measured vibrations in the inverted waveform pattern 605 is close (Step13). When the presentation of the inverted waveform pattern 605 ends, the control unit 6 ends the vibration feedback for the push operation simulating a mechanical switch.

(Effect of the second embodiment)
Since the tactile sensation providing apparatus 1 according to the present embodiment performs feedback control by measuring the vibration of the operation surface 20, the reproducibility of the waveform pattern 600 and the inverted waveform pattern 605 becomes higher than when this configuration is not adopted. Further, vibration feedback closer to the operational feeling of the mechanical switch can be performed.

  As mentioned above, although some embodiment and modification of this invention were demonstrated, these embodiment and modification are only examples, and do not limit the invention based on a claim. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. In addition, not all combinations of features described in these embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Further, these embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Tactile sense presentation apparatus, 2 ... Touch pad, 3 ... Pressure sensor, 4 ... Vibration actuator, 5 ... Vibration measurement part, 6 ... Control part, 8 ... Operating finger, 9 ... Vehicle, 20 ... Operation surface, 21 ... Back surface, 60 ... Waveform pattern information, 61 ... Threshold information, 91 ... Floor console, 92 ... Center console, 95 ... Display device, 600 ... Waveform pattern, 601-603 ... First waveform pattern to third waveform pattern, 601a ... first pressure, 602a ... relaxation pressure, 602b ... second pressure, 603a ... damping pressure, 605 ... reverse waveform pattern, 605a-605c ... first reverse pressure-third reverse pressure, 605d ... increased pressure

Claims (3)

An input detection unit for detecting an input made on the operation surface by the operation finger;
A pressure detection unit that detects a pressure applied to the operation surface in accordance with an input;
A vibration applying unit for applying vibration to the operation surface;
A first waveform pattern that vibrates the operation surface upward is applied to the operation finger so as to apply a first pressure to the operation finger after determining the push-in associated with the push operation based on the detected pressure. A second waveform pattern that continuously vibrates the operation surface downward and upward so that the first pressure is relaxed and then a second pressure is applied, and the operation surface is alternately attenuated upward and downward. Adding a vibration based on a waveform pattern having a third waveform pattern to be vibrated while being reversed, and an inverted waveform pattern obtained by inverting the waveform pattern after determining a pushback associated with the push operation based on the detected pressure A control unit for controlling the unit to present vibration feedback;
An input device with. A vibration measuring unit for measuring vibration of the operation surface;
The control unit performs feedback control so that the operation surface vibrates according to the waveform pattern and the inverted waveform pattern based on the vibration of the operation surface measured by the vibration measurement unit.
The input device according to claim 2. The third waveform pattern is a combined wave of a damping curve waveform and a damping vibration waveform.
The input device according to claim 1 or 2.

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