KR20170082001A - Display Device using Haptic Feedback Actuator - Google Patents

Display Device using Haptic Feedback Actuator Download PDF

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Publication number
KR20170082001A
KR20170082001A KR1020160001109A KR20160001109A KR20170082001A KR 20170082001 A KR20170082001 A KR 20170082001A KR 1020160001109 A KR1020160001109 A KR 1020160001109A KR 20160001109 A KR20160001109 A KR 20160001109A KR 20170082001 A KR20170082001 A KR 20170082001A
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KR
South Korea
Prior art keywords
haptic feedback
piezoelectric
electrostrictive polymer
cover layer
display device
Prior art date
Application number
KR1020160001109A
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Korean (ko)
Inventor
최승태
Original Assignee
울산대학교 산학협력단
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Publication date
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Priority to KR1020160001109A priority Critical patent/KR20170082001A/en
Publication of KR20170082001A publication Critical patent/KR20170082001A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

The present invention relates to a device capable of providing haptic feedback and a display device using the same, and can provide efficient haptic feedback regardless of the area of a display device using a plurality of haptic feedback drivers spaced apart from each other by a predetermined distance , It is possible to provide efficient haptic feedback by using compensation interference of a plurality of haptic feedback actuators.

Description

Technical Field [0001] The present invention relates to a display device using a haptic feedback driver,

The present invention relates to a device capable of providing haptic feedback and a display device using the same, and more particularly, to a haptic feedback driver capable of providing efficient haptic feedback through compensation interference using a plurality of haptic feedback drivers spaced apart from each other by a predetermined distance And a display device using the same.

As the flat display device is developed, the display area is increasing. As a result, large-sized displays with a size of 100 inches or more are mass-produced and released to the market. Along with the development of a flat display device, a touch interface is combined to provide an intuitive user interface.

Haptic feedback technology is applied to screens and display devices as a technique for providing feedback according to the input of a touch interface.

Conventionally, when a touch input is sensed by using an electric motor, the haptic feedback technology generates vibration by the driving force of the electric motor, thereby providing haptic feedback to the user.

However, since the haptic feedback by the electric motor generates the vibration in the entire apparatus, the driving force must be increased as the display area increases, and the driving force must be increased by increasing the size and power of the electric motor And the size of the display device is increased.

Actuators using piezoelectric devices and piezoelectric or electrostrictive polymers have been spotlighted as means for replacing electric motors, but technology has yet to be developed to provide efficient haptic feedback for large area display devices .

It is an object of the present invention to provide a display device capable of providing efficient haptic feedback irrespective of the area of a display device.

It is another object of the present invention to provide a display device capable of providing efficient haptic feedback through a plurality of combinations of haptic feedback driving periods.

According to an aspect of the present invention, there is provided a haptic feedback display device including a cover layer and a plurality of haptic feedback actuators spaced apart from each other on the cover layer.

Further, the cover layer may be a display panel including any one of a touch screen, a flexible screen, and a project screen.

The controller may further include a controller for controlling the driving force of the haptic feedback driver, and the controller may generate vibration through the haptic feedback driver disposed at the periphery when the touch is detected in the cover layer.

In addition, when the touch is detected between the plurality of haptic feedback drivers, the controller may generate compensation interference so that the amplitude of the vibration generated by the two or more haptic feedback actuators disposed in the peripheral portion has a maximum value at a portion where the touch is sensed have.

In addition, the controller may control the haptic feedback driver to generate vibration having a predetermined frequency.

In addition, the frequency may be 50 to 250 Hz.

In addition, the haptic feedback driver may include a piezoelectric or electrostrictive polymer actuator.

In addition, the piezoelectric or electrostrictive polymer actuator may include a piezoelectric or electrostrictive polymer film and electrodes disposed on both sides of the piezoelectric or electrostrictive polymer film.

In addition, the piezoelectric or electrostrictive polymer actuator may have a plurality of piezoelectric or electrostrictive polymer films laminated, and positive and negative electrodes may be alternately arranged between the laminated surfaces of the piezoelectric or electrostrictive polymer films.

In addition, the piezoelectric or electrostrictive polymer film may be formed of a PVDF-based film.

In addition, the electrode may be a transparent electrode.

In addition, the piezoelectric or electrostrictive polymer film may be continuously and uniformly formed on the cover layer, and the electrodes may be formed on both sides of the piezoelectric or electrostrictive polymer film.

The haptic feedback driver according to the embodiment of the present invention can provide efficient haptic feedback regardless of the area of the display device using a plurality of haptic feedback drivers spaced apart from each other by a predetermined distance.

Also, the display device according to the embodiment of the present invention can provide efficient haptic feedback by using compensation interference of a plurality of haptic feedback drivers.

1 is a view illustrating a haptic feedback display device according to an embodiment of the present invention.
FIG. 2 is a view illustrating an operation principle of a haptic feedback driver according to an embodiment of the present invention.
3A to 3D are views showing embodiments of a haptic feedback driver.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

1 is a view illustrating a haptic feedback display device 100 according to an embodiment of the present invention.

1, a haptic feedback display device 100 according to an exemplary embodiment of the present invention includes a cover layer 110 having a predetermined area and a plurality of haptic feedback A driver 120 may be included.

The cover layer 110 may comprise either a touch screen, a flexible screen, or a project screen. The cover layer 110 may be formed of a separate film, and the cover layer 110 itself may be a screen or a flat panel display panel.

When a separate cover layer 110 is provided, it is preferable that the cover layer 110 be made of a transparent material in order to reduce the distortion of the image projected from the screen or the display panel.

The cover layer 110 may be made of a flexible and highly elastic material so as to efficiently transmit the vibration generated by the haptic feedback driver 120 to a local region. The flexible and resilient cover layer 110 can vibrate according to the frequency generated by the haptic feedback driver 120, thereby providing efficient haptic feedback.

The haptic feedback actuators 120 are spaced apart from each other, and separate electrodes 122 (see FIG. 3A) are connected to the respective haptic feedback actuators 120, so that they can be individually driven. Since the haptic feedback driver 120 is individually driven to generate vibration, it is possible to generate local vibration at a portion requiring haptic feedback, thereby minimizing the power required to provide haptic feedback.

In addition, uniform haptic feedback can be provided regardless of the area of the display device by disposing a plurality of haptic feedback drivers 120 over the entire device area.

The haptic feedback display device 100 according to the embodiment of the present invention may further include a controller (not shown) for controlling the haptic feedback driver 120. [

Referring to FIG. 2, the principle of providing the haptic feedback display device 100 according to the present invention will be described.

FIG. 2 is a view showing the operation principle of the haptic feedback driver 120 according to the embodiment of the present invention.

As shown in FIG. 2, when a touch is sensed on the cover layer 110, the controller may generate vibration through the haptic feedback actuators 120a to 120d disposed in the peripheral portion.

The controller can individually control the vibrations of the haptic feedback actuators 120a to 120d according to the touch sensed position. Specifically, when the touch is sensed between the plurality of haptic feedback actuators 120a to 120d, the control unit controls the amplitude of the vibration generated by the two or more haptic feedback actuators disposed at the periphery to have a maximum value in the touch sensed portion (T) It is possible to generate compensation interference.

The vibrations generated by the plurality of haptic feedback actuators 120a to 120d spread in the form of wavelengths and overlap each other in the middle region. The superimposed wavelengths can be reduced or canceled by increasing or decreasing the amplitude by mutual compensation depending on the frequency and the phase.

That is, if the frequency and the phase are adjusted so that a plurality of wavelengths can compensate each other and the maximum amplitude point is matched, the amplitude increases, and efficient vibration can be generated even with a small power.

As shown in FIG. 2, the wavelengths generated by the plurality of haptic feedback actuators 120a to 120d are mutually superimposed in the touch sensed portion T, and the maximum amplitude point of the wavelengths is superimposed on the touch sensed portion T ) So that the amplitude has the maximum value. Therefore, the haptic feedback display device 100 according to the embodiment of the present invention can provide efficient haptic feedback even when a touch is detected on the cover layer 110 on which the haptic feedback driver 120 is not disposed.

The controller may provide different haptic feedback depending on the position, area, pressure, and input state of the sensed touch by adjusting the amplitude and frequency of the vibration generated by the haptic feedback driver 120. [

For this, the haptic feedback display device 100 according to the embodiment of the present invention may further include a touch sensing unit (not shown) capable of sensing the position, area, and pressure of the touch.

In addition, the controller may control the haptic feedback driver 120 to generate vibration having a predetermined frequency. The frequency of the vibration generated by the haptic feedback driver 120 may be in the range of 50 to 250 Hz, preferably 200 Hz, as a frequency at which the human can perceive the vibration most sensitively with the hand tip.

3A-3D are diagrams illustrating embodiments of a haptic feedback driver 120. FIG.

3A to 3 D, the haptic feedback driver 120 according to the embodiment of the present invention includes a piezoelectric or electrostrictive polymer film 121 and a piezoelectric or electrostrictive polymer film 121 on both sides thereof. And may include an electrode 122 formed thereon.

3A, a haptic feedback driver 120 according to an embodiment of the present invention may include a piezoelectric or electrostrictive polymeric film 121 and electrodes 122 disposed on both sides of the piezoelectric or electrostrictive polymeric film. have.

The piezoelectric or electrostrictive polymer film 121 may be made of a piezoelectric polymer or an electrostrictive polymer material, and preferably a PVDF-based piezoelectric polymer material.

Piezoelectric polymers or electrostrictive polymers have a strain ranging from several percent to several tens percent under electrical stimulation. As with other polymer materials, it is easy to apply to sensors and actuators because they can be easily manufactured in various forms. Do.

In particular, the present invention relates to an electrostriction polymer actuator using poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) or poly (vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) A relaxor ferroelectric polymer actuator can cause a strain of up to 5 to 7% under an electric field of about 20 to 150 V / μm.

3B, the haptic feedback driver 120 according to the embodiment of the present invention includes a piezoelectric / electrostrictive polymer film 121 and a piezoelectric / The electrodes 122 of the pole and the pole may be alternately arranged on the lamination.

The piezoelectric or electrostrictive polymer material has a strain increase in proportion to the electric field (V / μm). When the piezoelectric or electrostrictive polymer film 121 is formed as a thin film and laminated, and the positive and negative electrodes 122 are arranged alternately between the laminated surfaces, even if the same voltage is applied, the piezoelectric or electrostrictive polymer film 121 ) Is thin, the electric field is increased. Therefore, the haptic feedback driver 120 in which the piezoelectric or electrostrictive polymer film 121 and the electrode 122 are alternately stacked can increase the strain of the driving voltage and utilize the power efficiently.

The piezoelectric or electrostrictive polymer film 121 is continuously and uniformly formed on the cover layer 110 and the electrodes 122 are separated from each other on both sides of the piezoelectric or electrostrictive polymer film 121 as shown in FIGS. .

When the piezoelectric or electrostrictive polymer film 121 is continuously and uniformly formed on the cover layer 110 as in the embodiment shown in FIGS. 3c to 3d, the area where the piezoelectric or electrostrictive polymer film 121 is formed and the area It is possible to prevent image distortion due to the difference in transmission amount and refractive index.

At this time, the electrodes 122 are formed to be spaced apart from each other on both sides of the piezoelectric or electrostrictive polymer film 121, and an electric field is formed between the electrodes 122, so that a separate haptic feedback driver 120 can be formed.

The electrode 122 according to the embodiment of the present invention may be composed of a transparent electrode 122 to prevent image distortion. As the material of the transparent electrode 122, a transparent conducting oxide (TCO), a silver nanowire, a carbon nanotube (CNT), a graphene, a conducting polymer, Indium tin oxide (ITO), or the like can be used.

The features, structures, effects and the like described in the foregoing embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified and implemented. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

100: haptic feedback display device
110: Cover layer
120: Haptic feedback driver
121: Piezoelectric or electrostrictive polymer film
122; electrode

Claims (12)

A cover layer; And
And a plurality of haptic feedback actuators spaced apart from each other on the cover layer.
The method according to claim 1,
The cover layer
A haptic feedback display device, which is a display panel comprising any one of a touch screen, a flexible screen, and a project screen.
3. The method of claim 2,
Further comprising a control unit for controlling a driving force of the haptic feedback driver,
Wherein,
And a vibration is generated through a haptic feedback driver disposed at a peripheral portion when a touch is detected on the cover layer.
The method of claim 3,
Wherein,
And generates compensation interference so that the amplitude of the vibration generated by the two or more haptic feedback actuators disposed at the periphery has a maximum value at a portion where the touch is sensed when a touch is detected between the plurality of haptic feedback actuators.
The method of claim 3,
Wherein the controller controls the haptic feedback driver to generate vibration having a predetermined frequency.
6. The method of claim 5,
Wherein the frequency is 50 to 250 Hz.
The method according to claim 1,
Wherein the haptic feedback driver comprises a piezoelectric or electrostrictive polymer actuator.
8. The method of claim 7,
Wherein the piezoelectric or electrostrictive polymer actuator comprises:
Piezoelectric or electrostrictive polymer films; And
And electrodes disposed on both sides of the piezoelectric or electrostrictive polymer film.
8. The method of claim 7,
Wherein the piezoelectric or electrostrictive polymer actuator comprises:
A plurality of piezoelectric or electrostrictive polymer films are laminated,
Wherein a positive electrode and a negative electrode are alternately arranged in layers between the laminated surfaces of the piezoelectric or electrostrictive polymer films.
10. The method according to claim 8 or 9,
The above-mentioned piezoelectric or electrostrictive polymer film may be,
A haptic feedback display device comprising a PVDF-based film.
10. The method according to claim 8 or 9,
Wherein the electrode comprises a transparent electrode.
10. The method according to claim 8 or 9,
Wherein the piezoelectric or electrostrictive polymer film is continuously and uniformly formed on the cover layer,
Wherein the electrodes are spaced apart from each other on both sides of the piezoelectric or electrostrictive polymer film.

KR1020160001109A 2016-01-05 2016-01-05 Display Device using Haptic Feedback Actuator KR20170082001A (en)

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Application Number Priority Date Filing Date Title
KR1020160001109A KR20170082001A (en) 2016-01-05 2016-01-05 Display Device using Haptic Feedback Actuator

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KR1020160001109A KR20170082001A (en) 2016-01-05 2016-01-05 Display Device using Haptic Feedback Actuator

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109474720A (en) * 2018-11-06 2019-03-15 深圳天珑无线科技有限公司 A kind of control method of mobile terminal and mobile terminal
EP3582076A1 (en) * 2018-06-12 2019-12-18 Immersion Corporation Devices and methods for providing localized haptic effects to a display screen
US20220221936A1 (en) * 2021-01-12 2022-07-14 Industry-Academic Cooperation Foundation, Yonsei University Method for Providing Haptic Feedback

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3582076A1 (en) * 2018-06-12 2019-12-18 Immersion Corporation Devices and methods for providing localized haptic effects to a display screen
US11100771B2 (en) 2018-06-12 2021-08-24 Immersion Corporation Devices and methods for providing localized haptic effects to a display screen
CN109474720A (en) * 2018-11-06 2019-03-15 深圳天珑无线科技有限公司 A kind of control method of mobile terminal and mobile terminal
US20220221936A1 (en) * 2021-01-12 2022-07-14 Industry-Academic Cooperation Foundation, Yonsei University Method for Providing Haptic Feedback
US11726573B2 (en) * 2021-01-12 2023-08-15 Industry-Academic Cooperation Foundation, Yonsei University Method for providing haptic feedback

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