KR101016208B1 - Hybrid actuator using vibrator and solenoid, apparatus providing passive haptic feedback using the same, display unit using the same and control method - Google Patents

Abstract

PURPOSE: A vibration generating unit, a mixed type actuator using an electromagnetic force generating unit, a vacuum haptic providing device, and a display device and a control method using the same are provided to install a double vibration generating source by an electromagnetic force generating unit and a vibration generating unit, thereby increasing a vibration force. CONSTITUTION: A vibration generating unit(10) generates vibration according to strength of applied power. A lower plate(20) is placed in a lower part of the vibration generating unit and has elasticity. An electromagnetic force generating unit(30) is placed between the vibration generating unit and the lower plate and vibrates the lower plate through a magnetic force generated by electromagnetic induction. A fixing unit(40) fixes one end of the vibration generating unit and one end of the lower plate. The vibration generating unit includes an elastic upper plate and a piezoelectric member.

Description

Hybrid Actuator Using Vibrator and Solenoid, Apparatus Providing Passive Haptic Feedback Using the Same, Display Unit Using the Same and Control Method}

The present invention relates to a hybrid actuator using vibration generating means and electromagnetic force generating means, a vibration haptic providing device using the same, a display device using the same, and a control method thereof, and more specifically, by adding and subtracting vibration generating means to electromagnetic force generating means. By forming a double vibration source, vibration force is increased, miniaturization is possible, and low power consumption can be achieved by using a vibration generating means and a hybrid actuator using electromagnetic force generating means, a vibration haptic providing device using the same, a display device using the same and control thereof It is about a method.

Recently, researches for implementing haptic feedback through touch screens or touch pads of small portable terminals have been actively conducted. A vibration generating device is mainly used as a device for providing haptic feedback to such a mobile terminal. The vibration generating device uses a solenoid principle.

Thus, the vibration generating device using the solenoid generates a magnetic force in proportion to the number of coils and current strength wound on the bobbin. Therefore, the vibration generating apparatus using the solenoid has a problem that inevitably increases in volume or power consumption in order to increase the strength of the magnetic force to strengthen the vibration force.

Accordingly, the development of a vibration generator that consumes low power and can be miniaturized while increasing the vibration force is in need.

Therefore, the present invention was created to solve the above problems, by adding and subtracting vibration generating means to the electromagnetic force generating means to form a double vibration source by the vibration generating means and the hybrid type using the electromagnetic force generating means An actuator, a vibration haptic providing device using the same, a display device using the same and a control method thereof are provided.

In addition, due to the increase of the vibration force by further comprising the vibration generating means can reduce the electromagnetic force generating means and the vibration generating means capable of realizing low power consumption and the hybrid actuator using the electromagnetic force generating means, vibration haptic providing device using the same, The present invention provides a display apparatus and a control method thereof.

In addition, despite the generation of vibration using a pulse power source having a frequency of 1Hz to 50Hz, not only the vibration generating means and the electromagnetic force generating means can generate the increased vibration force, but also of the pulse power source provided through the control means. The present invention provides a hybrid actuator using a vibration generating means and an electromagnetic force generating means, a vibration haptic providing device using the same, a display device using the same, and a method of controlling the same.

In addition, the vibration generating means and the electromagnetic force generation to increase the vibration force through the resonance generated by vibrating the lower plate by providing a pulse power of approximately 100Hz to 300Hz close to the natural frequency of the lower plate or corresponding to an integer multiple The present invention provides a hybrid actuator using means, a vibration haptic providing device using the same, a display device using the same, and a control method thereof.

Other objects, specific advantages and novel features of the invention will become apparent from the following detailed description and the preferred embodiments described in conjunction with the accompanying drawings.

Means for achieving the object of the present invention, vibration generating means for generating a vibration in accordance with the intensity of the power applied; A lower plate having elasticity spaced apart from a lower portion of the vibration generating means; An electromagnetic force generating means provided between the vibration generating means and the lower plate and vibrating the lower plate through a magnetic force caused by electromagnetic induction; And a vibration generating means and an electromagnetic force generating means including a vibration generating means and a fixing means for fixing one end of the vibration generating means and one end of the lower plate so that the vibration generating means and the lower plate are spaced apart from each other.

In addition, the vibration generating means, the upper plate having an elastic; And a piezoelectric member vibrating according to the strength of the power provided provided on one side of the upper plate.

In addition, the vibration generating means is made of a pair of piezoelectric members are bonded, each piezoelectric member is a combined piezoelectric member for generating vibration by receiving power to operate in a different vibration mode;

In addition, the vibration generating means, the upper plate having an elastic; And an electroactive polymer vibrating according to the strength of the power provided provided on one side of the upper plate.

In addition, the electromagnetic force generating means, the permanent magnet provided on any one of the lower surface one side of the vibration generating means and one side of the upper surface of the lower plate; It characterized in that it comprises a; electromagnet provided so as to face each other and the permanent magnet on the other one of the lower end side of the vibration generating means and one side of the upper end of the lower plate.

In addition, one side of the lower plate is characterized in that the weight is further provided to increase the vibration force.

In addition, the fixing means is characterized in that it further comprises a case for accommodating the vibration generating means, the lower plate and the electromagnetic force generating means.

In addition, the vibration generating means and the electromagnetic force generating means, characterized in that the power supply having a frequency of 1Hz to 50Hz is provided and controlled so that the vibration generating means and the lower plate vibrates at least once in order to provide a user with a button click feeling.

In addition, the electromagnetic force generating means is characterized in that the lower plate vibrates at a frequency of 100Hz to 300Hz corresponding to the natural frequency of the lower plate so that the amplified vibration is generated.

In addition, a plurality of hybrid actuator is provided is characterized in that the vibration haptic providing device for providing a vibration haptic feedback to the user.

In addition, it characterized in that it further comprises a control means for controlling the power provided to the vibration generating means and the electromagnetic force generating means of the plurality of hybrid actuators, respectively.

In addition, the vibration haptic providing device is provided under the touch pad is characterized in that the user input device for providing a vibration haptic feedback to the user.

In addition, the vibration haptic providing apparatus is provided on the lower portion of the touch screen is characterized in that the display device for providing a vibration haptic feedback to the user.

The control means may control the power provided to the vibration generating means and the electromagnetic force generating means of the plurality of mixed actuators so that the vibration haptic providing device vibrates in conjunction with the graphics displayed on the display device.

In addition, in another category of the present invention, the step of transmitting the vibration request signal to the control means by the user's button input; The control means includes the steps of providing and controlling a power of a predetermined frequency to the vibration generating means and the electromagnetic force generating means so that the vibration generating means and the lower plate vibrate at least once each according to the vibration request signal; And vibrating at least once each of the vibration generating means and the lower plate by providing and controlling a power of a predetermined frequency, which is a control method of a mixed actuator using vibration generating means and electromagnetic force generating means to provide a user with a button click. It is characterized by.

In addition, the vibration in the vibration generating means and the lower plate vibrating at least once, characterized in that generated by at least one of the deformation force of the vibration generating means and the magnetic force of the electromagnetic force generating means.

In addition, the predetermined frequency is characterized in that 1Hz to 50Hz.

In addition, the step of transmitting the vibration request signal to the control means by the user setting conditions or button input; Controlling and supplying power to the electromagnetic force generating means by the control means in accordance with the vibration request signal; And generating amplified vibrations by resonating the lower plate as the electromagnetic force generating means receives the power and vibrates the lower plate at a predetermined frequency corresponding to the natural frequency of the lower plate. It features.

In addition, the predetermined frequency is characterized in that 100Hz to 300Hz.

According to the present invention, the vibration force is increased by dually forming the vibration source through the configuration of further adding the vibration generating means to the electromagnetic force generating means.

In addition, due to the increase in the vibration force by the addition of the vibration generating means can reduce the electromagnetic force generating means and there is an effect that can implement a low power consumption.

In addition, despite the use of a pulse power source having a frequency of 1Hz to 50Hz, there is an effect that can provide a vibration haptic feedback to the user by generating an increased vibration force through the vibration generating means and the electromagnetic force generating means. In particular, by controlling the period of the pulse power provided through the control means there is an effect that can provide a button click feeling to the user.

In addition, there is an effect that the vibration force is increased through the resonance generated by vibrating the lower plate by providing a pulse power of approximately 100 Hz to 300 Hz corresponding to the natural frequency of the lower plate or an integer multiple of the lower plate.

<Configuration of Mixed Actuator>

(First embodiment)

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration of the hybrid actuator (1) using a vibration generating means and an electromagnetic force generating means according to a preferred embodiment of the present invention.

1A is an exploded perspective view of a hybrid actuator according to a first embodiment of the present invention, and FIG. 1B is a combined perspective view of the hybrid actuator of a first embodiment according to the present invention.

As shown in Figure 1a and Figure 1b, the mixed actuator 1 according to the first embodiment of the present invention is approximately a vibration generating means 10, the bottom plate 20, the electromagnetic force generating means 30 and the fixing means ( 40) and the like. The mixed actuator 1 is formed so as to have a volume of 200 mm ³ or less. For example, the mixed actuator 1 is formed in a rectangular parallelepiped shape of 5 mm x 4 mm x 10 mm in width, length, and length.

Here, the vibration generating means 10 is a characteristic component in the present invention, a vibration generating device using a linear motor capable of generating vibration, a vibration generating device using ultrasonic waves, a vibration generating device using an electroactive polymer or piezoelectric Various devices, such as a vibration generating device using a member, can be used. However, in the first embodiment of the present invention, a vibration generating apparatus using a piezoelectric member or an electroactive polymer suitable for realizing miniaturization, efficient power consumption and rapid operation of the mixed actuator 1 is used. Such vibration generating means 10 will be described in detail below with reference to the drawings.

Fig. 2A is a side cross-sectional view of the hybrid actuator of the first embodiment according to the present invention, and Fig. 2B is a side cross-sectional view showing another example of the vibration generating means of the first embodiment according to the present invention.

As shown in Figure 2a, the vibration generating means 10 comprises a top plate 11 and a piezoelectric member 12. Here, the upper plate 11 is a thin plate-like member vibrating perpendicularly to the longitudinal direction, and is made of an elastic body. In this case, the upper plate 11 may be formed of a synthetic resin or metal having elasticity.

In addition, the piezoelectric member 12 in the present invention refers to a plate-shaped piezo actuator having bending, which is a known technique, and is characterized in that it extends or contracts in the longitudinal direction depending on the strength of the power supply. The piezoelectric member 12 may be coupled to one side of the upper plate 11, which is an elastic body having almost no expansion or contraction in the longitudinal direction, and thus may be moved up and down (based on FIG. 2A) according to the strength of the power source.

At this time, one side of the upper plate 11 to which the piezoelectric member 12 is coupled to the upper plate 11 is an upper surface of the upper plate 11 when the upper plate 11 is vibrated in one direction according to the expansion or contraction of the piezoelectric member 12. Or it can be anywhere on the bottom.

As in the other example shown in Fig. 2b, the vibration generating means 10 for generating a vibration by operating up and down through the control of the power source is a combination piezoelectric member 13 to which a pair of piezoelectric members 12 are joined. Can be done. At this time, each piezoelectric member 12 may be operated up and down (see FIG. 2B) by receiving power to different vibration modes, that is, to expand or contract differently. Here, the vibration generating means (10) made of the combined piezoelectric member (13) generates a stronger vibration force than the vibration generating means (10) made of the upper plate (11) and the piezoelectric member (12) described above through the control of the power source provided. You can.

The piezoelectric member 12 may perform the same function by replacing with electroactive polymers (EAP) whose volume is expanded or reduced in accordance with the strength of the provided voltage.

On the other hand, at one end of the vibration generating means 10 may be formed a first terminal 14 for supplying external power to the piezoelectric member 12 and the electroactive polymer.

The lower plate 20 is a plate-like component which is provided in parallel with the aforementioned vibration generating means 10 and vibrates by an electromagnetic force generating means, which will be described later. The lower plate 20 is made of an elastic body vibrable in one direction. One side of the lower plate 20 may further include a weight (21). This is to increase the vibration strength of the hybrid actuator according to the present invention by increasing the vibration force of the lower plate 20. At this time, the weight 21 is preferably formed of tungsten or lead, which is a metal of high density, and provided at the other end opposite to one end of the lower plate 20 fixed to the fixing means 40 to be described later. The lower plate 20 may be formed of synthetic resin or metal having elasticity similarly to the upper plate 11.

The electromagnetic force generating means 30 is a component that vibrates the lower plate 20 by generating magnetic force (human or repulsive force) through electromagnetic induction, and is provided between the vibration generating means 10 and the lower plate 20.

In more detail, the electromagnetic force generating means 30 includes a permanent magnet 31 and an electromagnet 32 as shown in FIGS. 1A to 2B. At this time, the permanent magnet 31 may be provided on one side of the lower surface of the vibration generating means 10, the electromagnet 32 may be provided on one side of the top surface of the lower plate 20 to face each other. have. After being provided as described above, a magnetic force (human or repulsive force) is applied between the lower plate 20 and the vibration generating means 10 through the control of the power source provided to the electromagnet 32 so that the lower plate 20 is vibrable. Here, the positions provided with the permanent magnets 31 and the electromagnets 32 may of course perform the same function. And the permanent magnet 31 and the electromagnet 32 facing each other and one end of the vibration generating means 10 in contact with the fixing means 40 to be described later for smooth vibration of the lower plate 20 and one end of the lower plate 20 and It is preferable that each of the opposite ends is provided.

The electromagnet 32 here generally comprises a coil and a bobbin in which the coil is wound. This electromagnet 32 generates a magnetic force in proportion to the number of coils and the current strength to be wound.

On the other hand, in order to supply external power to the electromagnet 32, the second terminal 24 formed at one end of the lower plate 20 is connected to both ends of the coil.

The fixing means 40 is a component for fixing the vibration generating means 10 and the lower plate 20 so that the vibration generating means 10 and the lower plate 20 are spaced apart from each other in parallel. One end and one end of the lower plate 20 is inserted into the coupling groove 42 formed in the fixing means 40 to be coupled. At this time, the coupling groove 42 is formed in consideration of the maximum vibration width of the vibration generating means 10 and the lower plate 20.

In addition, the case 41 protects the vibration generating means 10, the lower plate 20, and the electromagnetic force generating means 30 from an impact applied from the outside, and the vibration generating means 10 and the electromagnetic force generating means housed inside the case 41. It is a component that transmits the vibration generated by 30 to the outside. The case 41 is manufactured in a box shape having at least one side open, and can accommodate the vibration generating means 10, the lower plate 20 and the electromagnetic force generating means 30, as well as a space in which smooth vibration can be made. It is formed to be provided inside. The open end of the case 41 thus formed is connected to and fixed to one end of the fixing means 40.

As described above, the mixed actuator 1 according to the present invention is completed by the vibration generating means 10, the lower plate 20, the electromagnetic force generating means 30 and the fixing means 40, and the like.

(Second embodiment)

Hereinafter, a second embodiment of the hybrid actuator 1 using the vibration generating means and the electromagnetic force generating means according to the present invention will be described in detail with reference to FIG.

3 is a side cross-sectional view of the hybrid actuator of the second embodiment according to the present invention. As shown in FIG. 3, the hybrid actuator 1 of the second embodiment according to the present invention comprises a vibration generating means 10, a lower plate 20, an electromagnetic force generating means 30, and a fixing means 40. It is the same as the structure of one embodiment as a whole. However, in order to miniaturize and increase the strength of vibration has shown a difference in form. Therefore, the detailed description of each component is replaced with the above description, and will be described below with a different configuration.

First, the upper plate 11 of the vibration generating means 10 of the second embodiment according to the present invention is connected to the first horizontal member 15 in the horizontal direction (see Fig. 3) and the first vertical member (vertically formed in the vertical direction ( 16) to form a ┏ shape (see Fig. 3). In this case, the piezoelectric member 12 or the electroactive polymer may be provided on at least one of one side of the top surface or one side of the bottom surface of the first horizontal member 15, and one end of the first horizontal member 15 may be fixed to the fixing means 40. Connected and fixed. In addition, a permanent magnet 31 may be provided on an inner surface of the first vertical member 16.

In addition, the lower plate 20 of the vibration generating means 10 of the second embodiment according to the present invention is perpendicular to both ends of the second horizontal member 25 and the second horizontal member 25 in the horizontal direction (see FIG. 3). Each of the second vertical member 26 and the third vertical member 27 formed in the form of a k-shape (see Fig. 3). In addition, an electromagnet 32 is provided at a position corresponding to the above-described permanent magnet 31 on the inner surface of the second vertical member 26. The lower plate 20 is fixed to the inside of the case 41 by connecting one end of the third vertical member 27 to the case 41.

As described above, the upper plate 11 and the lower plate 20 of the second embodiment according to the present invention are partially deformed in terms of form, thereby increasing the number of coils wound on the electromagnet 32 in comparison with the first embodiment. It can generate strong magnetic force. Therefore, the intensity of vibration can be increased through this.

As described above, in the mixed actuator 1 of the first and second embodiments, the vibration force is greatly increased by forming a vibration source in a double manner through the addition of the vibration generating means to the electromagnetic force generating means 30. In addition, due to the increased vibration force, the size of the electromagnet 32 of the electromagnetic force generating means 30 may be partially reduced, which may help to reduce the size of the mixed actuator 1 and reduce the number of coils wound around the electromagnet 32. Can achieve low power consumption.

The vibration generating means 10, the lower plate 20, the electromagnetic force generating means 30 and the fixing means 40, and the like and the vibration of the various modes expressed between them through the control of the power supply provided. Specific description thereof will be described in detail in the control method of the hybrid actuator 1 according to the present invention to be described later.

< Vibration Haptic Device  And other devices>

Hereinafter, the vibration haptic providing apparatus 100 and the other apparatuses 3 and 4 using the mixed actuator 1 according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view showing a vibration haptic providing apparatus according to the present invention, Figure 5 is an exploded perspective view when the vibration haptic providing apparatus according to the present invention is used in a notebook (user input device), Figure 6 is according to the present invention FIG. 7 is an exploded perspective view when the vibration haptic providing device is used in a mobile phone (display device), and FIG. 7 is a front view schematically showing a state of use of the vibration haptic providing device which is linked to the graphic displayed on the display device of FIG. 6.

As shown in FIG. 4, the vibration haptic providing apparatus 100 according to the present invention is to provide vibration haptic feedback to a user, and includes a plurality of mixed actuators 1 and control means 110 for controlling the same. Is done. In this case, the plurality of mixed actuators 1 are fixed to the printed circuit board 120 and are connected to the control means 110 through the wiring 130. The vibration haptic providing apparatus 100 configured as described above is driven through the mixed actuator 1 which is supplied with power through the control means 110, respectively. Here, the detailed description of the mixed actuator 1 constituting the vibration haptic providing device 100 is replaced with the description of the configuration of the mixed actuator 1 described above.

On the other hand, the vibration haptic providing apparatus 100 may change the number and position of the hybrid actuator 1 according to the characteristics, use and purpose of the device (for example, mobile phone, laptop, etc.) using the vibration haptic. However, it is desirable to provide vibration haptic feedback to the user with one to five hybrid actuators 1. This achieves low power consumption while simultaneously placing five hybrid actuators 1 at each vertex of the circuit board 120 and one at the center region (not shown) as shown in FIG. This is because it can provide sufficient and various vibration haptic feedback to the user.

 The vibration haptic providing device 100 is a portable device having an input device such as a joystick, a mouse, a keyboard, and a display device such as a mobile phone, an MP3 terminal, a PDA terminal, and a navigation device, which can provide vibration haptic feedback to a user through physical contact with the user. It may be utilized in the terminal. Hereinafter, the control means 110 and the vibration haptic providing apparatus 100 of the vibration haptic providing apparatus 100 will be described in detail with reference to the drawings.

As shown in FIG. 5, when the user input device 5 according to the present invention is used in the notebook 3, the user input device 5 may include a touch pad 300 and a vibration haptic providing device 100. It is made to include. In this case, the vibration haptic providing device 100 is located under the touch pad 300. Here, the touch pad 300 refers to an input device that replaces a mouse with a small flat plate on which a pressure sensor is attached.

As such, the user input device 5 is provided with the vibration haptic feedback to the user as the mixed actuator 1 is independently controlled through the control means 110 of the vibration haptic providing device 100 positioned below the touch pad 300. To provide.

As shown in FIG. 6, when the display device 6 according to the present invention is used in the mobile phone 4, the display device 6 includes a touch screen 400, a vibration haptic providing device 100, and the like. Is done. In this case, the vibration haptic providing device 100 is located below the touch screen 400. Here, the touch screen 400 refers to a device having a transparent touch pad on the display panel, which is an image display device.

The display device 6 provided as described above provides vibration haptic feedback to the user as the mixed actuator 1 is independently controlled through the control means 110 of the vibration haptic providing device 100 positioned below the touch screen 400. to provide.

Meanwhile, a pressure sensor (not shown) may be further provided between the above-described touch pad 300 or the touch screen 400 and the vibration haptic providing device 100. At this time, the pressure sensor is a member that detects the distribution state and magnitude of the external force applied to each part by using an electrical signal generated by the compression or elongation when the external force is applied. That is, it generates an electrical output signal changed in proportion to the strength of the external force. As the pressure sensor usable in the present invention, various pressure sensors such as an electronic pressure sensor made of a thin film, a semiconductor pressure sensor, or an optical fiber pressure sensor may be used.

The control unit 110 controls the power provided to the vibration haptic providing apparatus 100 to adjust the vibration haptic feedback. Specifically, the adjustment of the vibration haptic feedback is performed by independently controlling the power provided to the vibration generating means 10 and the electromagnetic force generating means 30 constituting the mixed actuator 1 for each mixed actuator 1. In this case, controlling the power source means that the control unit 110 controls the intensity of the power source (the strength of the current or the voltage), the time for providing the power source, the frequency of the provided power source, and the like.

On the other hand, the control means 110 is driven based on the strength of the external force sensed by a pressure sensor (not shown) to apply a certain amount of power to any of the mixed actuator (1) of the mixed actuator (1) It is desirable to be able to choose whether or not to do so. As a result, the vibration haptic providing device 100 provided below the touch pad 300 such as the notebook 3 and the touch screen 400 such as the mobile phone 4 receives various vibration haptic feedback based on the strength of the external force. Can be provided to

On the other hand, even if the pressure sensor is not provided, the control means 110 may be implemented to extract the position information on the external force through the pressure sensor of the touch pad 300 or the touch screen 400 itself. In addition, the control unit 110 is a vibration haptic feedback apparatus 100 for the vibration haptic feedback of the mode corresponding to the extracted position information with reference to a program or database that has previously implemented various modes of vibration haptic feedback for arbitrary position information. It can be controlled to be provided to the user through.

In particular, when the display device 6 according to the present invention is used in a portable terminal or the like, the control means 110 may control the vibration haptic providing device 100 to vibrate in conjunction with graphics displayed by the display device 6. have. This is based on a program or database that pre-implemented various modes of vibration haptic feedback for any graphic information to be displayed, and the control means 110 interlocks with the graphic displayed on the corresponding display device 6 to provide the vibration haptic providing device ( 100 may be provided by providing and controlling power to vibrate.

As an example, as shown in FIG. 7, the display device 6 of the mobile phone 4 is provided with a mixed actuator 1 at each vertex of a rectangle. In this case, in order to provide a vibration haptic feedback to the user in conjunction with the graphic, the mixed actuator 1 provided on the upper left side may periodically generate a weak vibration to realize the feeling of the swell and the distant sea. And the mixed actuator (1) provided on the lower left side can periodically generate a medium or strong vibration can realize the feeling of the shoulder and the near sea. Here, the vibration of the mixed actuator 1 provided at the upper left and lower ends is preferably set to alternately occur in order to live the feeling of the sea. In addition, the rumbling of the vessel located on the right side may be implemented by the mixed actuator 1 located on the upper right and lower sides alternately repeating the rattling vibrations such as a button click feeling. In this case, a rattling vibration such as a button click feeling will be described in detail in the following control method.

<Control method of mixed actuator>

Hereinafter, a control method for providing a button click feeling and a control method for generating an amplified vibration through the mixed actuator 1 according to the present invention will be described in detail with reference to the drawings.

 Meanwhile, for convenience of explanation, the overall control method by the control means 110 connected thereto will be described based on the mixed actuator 1 according to the first embodiment shown in FIGS. 1A to 2A.

(Control method to provide a button click feeling)

8 is a flow chart according to a control method for implementing a button click feeling by using a mixed actuator according to the present invention, Figure 9 is a side cross-sectional view showing the force causing the operating state and vibration of the mixed actuator when the button click feeling is implemented. .

First, as shown in Figure 8, the vibration request signal is transmitted to the control means 110 by the user's button input. Here, the button does not refer to a general button that reciprocates a predetermined depth up and down by being pressed by an external force as in the case of a general button, but refers to a button having almost no up and down reciprocation because a symbol, a character, or a figure is expressed on a plane. That is, a button implemented on the touch pad 300 or the touch screen 400 corresponds to this.

When the user presses such a button, the device equipped with the mixed actuator 1 (for example, a mobile terminal having a touch screen) receives a value corresponding to an externally applied button as input information. At the same time, the device equipped with the hybrid actuator 1 generates a vibration request signal to provide a vibration haptic feedback to the user. And the vibration request signal generated in this way is transmitted to the control means 110 for controlling the vibration of the mixed actuator (1) according to the present invention.

At this time, if a pressure sensor for measuring the strength of the external force applied to the button is provided, the information on the strength of the external force measured by the pressure sensor may be included in the vibration request signal. As a result, the control unit 110 receiving the vibration request signal may control the addition or subtraction of the vibration according to the external force (S100).

Next, the control means 110 is a power source of a predetermined frequency to the vibration generating means 10 and the electromagnetic force generating means 30 so that the vibration generating means 10 and the lower plate 20 vibrates at least once each according to the vibration request signal. To provide and control. Hereinafter, the type of the power source provided and controlled through the control unit 110 to perform such a function, the supply time of the power source, and the frequency of the power source will be described in detail.

First, as the power supplied to the vibration generating means 10 and the electromagnetic force generating means 30 through the control means 110, pulse power having various pulse widths and periods may be used. However, in order for the vibration generating means 10 and the lower plate 20 to generate and maintain a constant vibration, the same phase pulse power source having the same pulse width and period is applied to the vibration generating means 10 and the electromagnetic force generating means 30. It is good to be provided. The vibration generating means 10 repeats expansion and contraction by the provision of the pulse power, and the electromagnetic force generating means 30 repeats the attraction force and the repulsive force through the permanent magnet 31 and the electromagnet 32. ) And the lower plate 20 may vibrate, respectively.

On the other hand, when the same-phase pulse power source having the same width and period are provided to the vibration generating means 10 and the electromagnetic force generating means 30, respectively, the vibration generating means 10 and the lower plate 20 are opposite to each other. It can take a mode to vibrate or to vibrate in the same direction. At this time, the change of the vibration mode may be made by changing the position of the N / S pole of the permanent magnet 31 or the direction of the current flowing through the coil of the electromagnet 32 when pulse power of the same phase is provided at the same time. . It is preferable that the selection of the vibration mode can be set by the user.

And the control means 110 for the one time vibration (contraction and expansion) of the vibration generating means 10 and the one time vibration (repulsion and attraction) of the lower plate 20, the pulse power of one cycle only the vibration generating means (10) And the pulse power supply to be provided to the electromagnetic force generating means (30). Through the control of the control means 110, the vibration generating means 10 and the lower plate 20 can provide the user with a vibrating feel.

In the same manner, for two vibrations of the vibration generating means 10 and the lower plate 20, the control means 110 can control the pulse power of two cycles to be provided to the vibration generating means 10 and the electromagnetic force generating means 30. Can be. This makes it possible to provide the user with a rattle-rumble vibration.

Such a rattling button click feeling may be provided to the user by using two to three consecutive vibrations as a unit of one button clicking feeling. However, when the button is pressed, four or more consecutive vibrations may be perceived by the user as a repetitive simple vibration, which is not preferable for implementing a button click feeling.

In addition, the frequency of the power supplied to the vibration generating means 10 and the electromagnetic force generating means 30 through the control means 110 is inversely related to the cycle of the power source, and the cycle of the power source maintains vibration for the realization of a button click feeling. It is equal to the time (hereinafter, vibration holding time). That is, when the pulse power of one cycle having a large frequency is provided to the vibration generating means 10 and the electromagnetic force generating means 30 to generate one vibration for the button click, the vibration generating means 10 and the lower plate 20 are provided. The vibration holding time of h) becomes short.

The vibration holding time can be variously changed through user setting. However, the preferable vibration holding time is preferably 20 milliseconds (ms) to 1 second (s). This is because within this range, the user can appropriately provide a button click feeling to the user in response to each button click even if the user is battering the button quickly or slowly. The same applies to the case where two to three consecutive vibrations are used as a unit of a button click feeling.

Therefore, in order to implement the vibration holding time within this range, the control means 110 provides a pulse power source having a frequency of 1 Hz to 50 Hz to the vibration generating means 10 and the electromagnetic force generating means 30 (S200).

Finally, as shown in FIGS. 8 and 9, the vibration generating means 10 and the lower plate 20 vibrate at least once through the provision and control of a power of a predetermined frequency.

As shown in FIG. 9, when the vibration generating means 10 and the lower plate 20 are in a mode of vibrating in opposite directions, the vibration generating means receives a pulse power of 1/2 cycle from the control means 110 ( 10) is subjected to a force in the upward direction (see Fig. 9) as a result of the deformation force (F side: shrinkage) of the piezoelectric member 12 is applied. At the same time, the electromagnetic force generating means 30, which receives the pulse power of 1/2 cycle from the control means 110, generates a magnetic force such that the repulsive force (F letter) is exerted on the vibration generating means (10). Due to this repulsive force, the vibration generating means 10 is driven with an amplitude larger than the amplitude according to the intensity of the provided pulse power source. On the other hand, the electromagnetic force generating means 30 is bent in a direction away from the vibration generating means 10 as a result of the vibration generating means 10 and the repulsive force acting.

In addition, the vibration generating means 10 which receives the pulse power of the remaining 1/2 cycle from the control means 110 has a downward force due to the deformation force (expansion) of the piezoelectric member 12 and the attraction force of the electromagnetic force generating means 30. As shown in FIG. 9). At this time as well, by the magnetic force of the electromagnetic force generating means 30, the vibration generating means 10 is driven with an amplitude larger than the amplitude according to the intensity of the provided pulse power source.

In this way, the provision of the one-cycle pulse power supply through the control means 110 enables one-time vibration of the vibration generating means 10 and the lower plate 20. In addition, the vibration holding time of the vibration generating means 10 and the lower plate 20 is determined according to the frequency of the one cycle pulse power supply.

On the other hand, through the pulse power control in this manner, the vibration generating means 10 and the lower plate 20 performs the vibration once or three times in accordance with the unit of the set button click feeling (S300).

Thus, the hybrid actuator 1 having the vibration generating means 10 and the electromagnetic force generating means 30 has a vibration force that is superior to a device generating vibration only by the existing electromagnetic force generating means 30 by constituting a double vibration source. Is increased. In addition, the vibration generating means 10 is driven by an amplitude larger than the amplitude of the vibration generating means 10 itself due to the influence of the magnetic force of the electromagnetic force generating means 30, the vibration force is further increased.

Therefore, the present invention can provide not only increased vibration force but also low power despite the use of a pulse power source whose frequency corresponds to 1 Hz to 50 Hz. This is comparable to the conventional vibration generator using a pulsed power source with a high frequency of around 200 Hz to provide the user with vibration haptic feedback. In addition, the present invention can provide a user with a button click feeling by controlling the period of the pulse power provided through the control means 110.

(Control method for generating amplified vibration)

FIG. 10 is a flowchart illustrating a control method for implementing amplified vibration haptic feedback using the hybrid actuator according to the present invention, and FIG. 11 is a side cross-sectional view illustrating an operating state of the hybrid actuator when the amplified vibration haptic feedback is implemented.

First, as shown in FIG. 10, the vibration request signal is transmitted to the control means 110 by a user's setting condition or input. This is generally the same as described in the above method for providing a button click feeling. However, a vibration request signal may be generated and transmitted to the control means 110 according to a user's setting condition (eg, an alarm of a mobile phone, a phone reception method by vibration, etc.) (S1000).

Next, the control means 110 provides and controls power to the electromagnetic force generating means 30 in accordance with the vibration request signal. Hereinafter, the type of the power supplied and controlled through the control means 110, the supply time of the power and the frequency of the power will be described in detail.

First, as the power provided to the vibration generating means 10 and the electromagnetic force generating means 30 through the control means 110, pulse power having various pulse widths and periods may be used. The vibration generating means 10 repeats expansion and contraction by providing a pulse power source having such a period, and the electromagnetic force generating means 30 generates vibration by repeating attraction and repulsive force through the permanent magnet 31 and the electromagnet 32. The means 10 and the lower plate 20 can each vibrate.

And the control means 110 for the vibration of the lower plate 20 is to continuously provide the pulse power to the electromagnetic force generating means 30 in accordance with a predetermined time corresponding to the above-described user setting conditions or the user's button input. For example, when vibration is generated according to an alarm setting of a mobile phone or the like, the control means 110 continuously provides the pulse power to the electromagnetic force generating means 30 until the user presses the stop button or for a predetermined time.

In addition, the control means 110 may generate vibrations by providing pulse power of various frequencies to the vibration generating means 10 and the electromagnetic force generating means 30, respectively. However, a pulse power source having a frequency of approximately 100 Hz to 300 Hz generates a vibration generating means 10 and electromagnetic force through the control means 110 so that a general person can generate a vibration of approximately 100 Hz to 300 Hz that can feel the vibration sensitively. It is preferable to be provided to the means 30 (S2000).

Next, as shown in FIG. 11, the lower plate 20 vibrates as the electromagnetic plate generating means 30 vibrates the lower plate 20 at a predetermined frequency corresponding to the natural frequency of the lower plate 20. Resonant and amplified vibrations occur. That is, when the pulse power of approximately 100 Hz to 300 Hz corresponding to the natural frequency of the lower plate 20 or an integer multiple is provided to the electromagnetic force generating means 30 to vibrate the lower plate 20, the vibration of the lower plate 20 is The amplitude is increased by resonance. Thus, the amplified vibration haptic feedback can be provided to the user.

Here, the elastic modulus and mass of the lower plate 20 which is a vibrating body may be set through Equation 1 such that the frequency of 100 Hz to 300 Hz is close to the natural frequency of the lower plate 20 or corresponds to an integer multiple. At this time, k is the elastic modulus of the lower plate 20, m is the mass of the electromagnet 32 and the weight (21) provided in the lower plate (20).

On the other hand, the piezoelectric member 12 of the vibration generating means 10 is significantly reduced in expansion and contraction when a pulse power of approximately 100Hz to 300Hz is applied due to the characteristics of the piezoelectric element. Therefore, the amplitude of the vibration generating means 10 is also reduced (S3000).

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meanings and equivalent concepts of the claims should be construed as being included in the scope of the present invention.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention, and therefore, the present invention is limited only to the matters described in the drawings. It should not be interpreted.

1A is an exploded perspective view of a hybrid actuator according to a first embodiment of the present invention.

Figure 1b is a perspective view of the combined actuator of the first embodiment according to the present invention.

2A is a side cross-sectional view of the hybrid actuator of the first embodiment according to the present invention;

Figure 2b is a side cross-sectional view showing another example of the vibration generating means of the first embodiment according to the present invention.

3 is a side cross-sectional view of the hybrid actuator of the second embodiment according to the present invention;

Figure 4 is a perspective view showing a vibration haptic providing apparatus according to the present invention.

5 is an exploded perspective view of a vibration haptic providing apparatus according to the present invention used in a notebook (user input device).

Figure 6 is an exploded perspective view when the vibration haptic providing apparatus according to the present invention is used in a mobile phone (display device).

FIG. 7 is a front view schematically showing a state of use of a vibration haptic providing device interlocked with graphics displayed on the display device of FIG. 6;

8 is a flow chart according to a control method for implementing a button click feeling using a mixed actuator according to the present invention.

Figure 9 is a side cross-sectional view showing the operating state of the mixed-actuator and the force causing vibration when implementing the button click feeling.

10 is a flow chart according to a control method for implementing amplified vibration haptic feedback using a hybrid actuator according to the present invention.

11 is a side cross-sectional view showing an operating state of a hybrid actuator in the implementation of amplified vibration haptic feedback.

<Explanation of symbols for the main parts of the drawings>

1: Mixed Actuator According to the Present Invention

2: finger 3: notebook

4: mobile phone 5: user input device

6: display device 10: vibration generating means

11: top plate 12: piezoelectric member

13: combined piezoelectric member 14: first terminal

15: first horizontal member 16: first vertical member

20: Bottom 21: Weight

24: second terminal 25: second horizontal member

26: second vertical member 27: third vertical member

30: electromagnetic force generating means 31: permanent magnet

32: electromagnet 40: fixing means

41: case 42: coupling groove

100: vibration haptic providing device 110: control means

120: circuit board 130: wiring

300: touch pad 400: touch screen

Claims (19)

Vibration generating means for generating vibration in accordance with the strength of the applied power; A lower plate having elasticity spaced apart from a lower portion of the vibration generating means; Electromagnetic force generating means provided between the vibration generating means and the lower plate and vibrating the lower plate through a magnetic force caused by electromagnetic induction; And And a fixing means for fixing one end of the vibration generating means and one end of the lower plate so that the vibration generating means and the lower plate are spaced apart from each other. The method of claim 1, The vibration generating means, An upper plate having elasticity; And And a piezoelectric member vibrating according to the strength of the power provided provided on one side of the upper plate. The method of claim 1, The vibration generating means, A pair of piezoelectric members are joined and made, And each piezoelectric member is a combined piezoelectric member that generates vibration by receiving power to operate in a different vibration mode. The method of claim 1, The vibration generating means, An upper plate having elasticity; And And an electroactive polymer vibrating according to the strength of the power provided provided on one side of the upper plate. The method of claim 1, The electromagnetic force generating means, A permanent magnet provided on any one of a lower end side of the vibration generating unit and an upper end side of the lower plate; Mixed vibration actuator and electromagnetic force generating means comprising a; electromagnet provided to face each other with the permanent magnet on the other one of the lower end surface side of the vibration generating means and one side of the upper surface of the lower plate. The method of claim 5, One side of the lower plate is a mixed actuator using vibration generating means and electromagnetic force generating means characterized in that the weight is further provided to increase the vibration force. The method of claim 1, The fixing means, Mixed type actuator using the vibration generating means and the electromagnetic force generating means, characterized in that it further comprises a case for accommodating the vibration generating means, the lower plate and the electromagnetic force generating means. The method of claim 1, The vibration generating means and the electromagnetic force generating means, the vibration is characterized in that a power source having a frequency of 1Hz to 50Hz is provided and controlled so that the vibration generating means and the lower plate vibrates at least once to provide a user with a button click feeling Hybrid actuator using generating means and electromagnetic force generating means. The method of claim 1, The electromagnetic force generating means is a mixed-actuator using the vibration generating means and the electromagnetic force generating means, characterized in that for vibrating at a frequency of 100Hz to 300Hz corresponding to the natural frequency of the lower plate so that the lower plate is resonated and amplified. 10. A vibration haptic providing apparatus for providing a vibration haptic feedback to a user by providing a plurality of hybrid actuators according to any one of claims 1 to 9. 11. The method of claim 10, Vibration haptic providing device further comprises a control means for controlling each of the power supply to the vibration generating means and the electromagnetic force generating means of the plurality of hybrid actuator. The user input device according to claim 11, wherein the vibration haptic providing device is provided under the touch pad to provide a vibration haptic feedback to the user. 12. A display apparatus according to claim 11, wherein the vibration haptic providing device is provided under the touch screen to provide vibration haptic feedback to the user. The method of claim 13, And a control means for controlling the power provided to the vibration generating means and the electromagnetic force generating means of the plurality of mixed actuators so that the vibration haptic providing device vibrates in cooperation with the graphic displayed by the display device. In the control method of the mixed actuator according to any one of claims 1 to 9, Transmitting a vibration request signal to a control means by a user's button input; The control means comprises the steps of providing and controlling a power of a predetermined frequency to the vibration generating means and the electromagnetic force generating means so that the vibration generating means and the lower plate vibrate at least once each in accordance with the vibration request signal; And Vibrating the vibration generating means and the lower plate at least once each by providing and controlling the power of the predetermined frequency; Control method of a mixed-type actuator using the vibration generating means and the electromagnetic force generating means, characterized in that to provide the user with a button click feeling. The method of claim 15, The vibration in the step of vibrating the vibration generating means and the lower plate at least once, Control method of a mixed actuator using the vibration generating means and the electromagnetic force generating means, characterized in that generated by at least one of the deformation force of the vibration generating means and the magnetic force of the electromagnetic force generating means. The method of claim 15, The predetermined frequency is a control method of a mixed actuator using vibration generating means and electromagnetic force generating means, characterized in that 1Hz to 50Hz. In the control method of the mixed actuator according to any one of claims 1 to 9, Transmitting a vibration request signal to the control means by a user setting condition or a button input; Controlling and supplying power to the electromagnetic force generating means by the control means in accordance with the vibration request signal; And And generating the amplified vibration by resonating the lower plate as the electromagnetic force generating means receives the power and vibrates the lower plate at a predetermined frequency corresponding to the natural frequency of the lower plate. A control method of a mixed actuator using vibration generating means and electromagnetic force generating means characterized in that the amplified vibration haptic feedback is implemented. The method of claim 18, The predetermined frequency is a control method of a mixed actuator using vibration generating means and electromagnetic force generating means, characterized in that 100Hz to 300Hz.

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