KR20130109027A - Haptic actuating touch screen - Google Patents

Abstract

PURPOSE: A haptic sense-generable touch screen can provide button feelings or various touch feelings by vibrating a substrate of a touch panel based on electrostatic force generated in portions where a hand is touched. CONSTITUTION: A touch panel comprises a substrate with electrodes (203,207). An additional electrode (211) generates haptic sense on the touched portions of the touch panel using electrostatic force generated between the electrodes. The additional electrode is formed above an upper substrate of a display panel. The touch panel is formed above the additional electrode and is an analog resistive type or a capacitive overlay type.

Description

Touch screen to create a touch {HAPTIC ACTUATING TOUCH SCREEN}

The present invention relates to a touch screen implementation technology that provides a button feeling or various touch feelings in the place where the user touches locally when the user interacts with an object represented on the touch screen.

Various types of digital terminals such as mobile phones, navigation, digital information displays (DIDs), and tablets that are currently being released basically provide a touch interface. As a method for enhancing the user experience by interworking with the touch interface, a recently emerging technology is a haptic technology that provides a touch. Haptic technology can provide a more realistic user interface by generating various types of tactile sensations when a user interacts with a digital object, thereby providing feedback in a fused form of visual and haptic to the user.

As a conventional method for providing a touch, a motor method is the most common. Motor systems have been used in a variety of mobile devices because of their fast response speed, low power and ease of tactile output control. However, in the case of providing the tactile feeling by the motor method, there is a difficulty in arranging the module due to the size of the tactile module, and the thickness of the mechanism itself is thick. In particular, the conventional technique using the motor method is a structure in which vibration propagates through the entire apparatus, so it is difficult to provide a localized haptic sense only in the place where the user can reach it locally, so it is applied to navigation, DID, monitor, etc., rather than a portable electronic device. It's hard to do.

In order to overcome these disadvantages, a film type tactile module technology that can be mounted on a display panel has recently emerged. The film type tactile module is largely divided into the case of using the deformation of the material itself using the electroactive polymer material and the case of using the electrostatic force. In the case of using an electroactive polymer material, it is possible to implement a tactile module having a film-type, low power, and fast reaction speed according to the characteristics of the polymer. At this time, since it is difficult to produce sufficient output only by deformation of the polymer material, an additional device having a certain weight may be used. Eventually, the deformation of the electroactive polymers causes the attachment to be exercised, and the user is provided with tactile feeling due to the movement of the attachment. In this case, therefore, an electroactive polymer layer and an additional device are required to produce sufficient output.

The conventional method using the electrostatic force is to charge the same or different charges to each substrate while the two substrates coated with a conductive material face each other, the electrostatic force generated, ie instantaneous attraction between them It is a principle that generates the touch by force. As described above, an actuator device composed of two substrates is independently configured above or below the touch panel. In practical applications, an additional insulation layer is required to be inserted between the substrates to prevent conduction.

In the above-described prior arts, in order to simultaneously provide location recognition and tactile feedback by touch, a plurality of substrates, electrode layers, and insulating layers must be inserted in addition to or above the existing touch panel. However, when such a structure is inserted into the touch screen, there is a problem that the yield of the product is lowered, the unit price is increased, and the light transmittance is lowered.

The present invention has been proposed to solve the above problems, and when the user interacts with the object represented on the touch-type display, a touch screen that generates a local touch or a variety of touch at the touch of the user's hand It aims to provide.

In particular, the present invention minimizes the additional structure for the generation of touch by simultaneously using one electrode layer constituting the existing touch panel as an electrode layer for transmitting the touch, thereby reducing yield and light transmittance on touch screen manufacturing. It is an object to provide a touch screen that can be prevented.

The touch screen for generating a tactile touch according to an embodiment of the present invention for achieving this object is generated between a touch panel including one or more substrates each formed with one or more electrodes and a specific one of the one or more electrodes. And an additional electrode which generates touch to the touched portion on the touch panel by using an electrostatic force.

The additional electrode may be formed on the upper substrate of the display panel, and the touch panel may be formed on the additional electrode.

The touch panel may be a resistive touch panel or a capacitive touch panel.

Touch screen for generating a touch of the resistive film type according to an embodiment of the present invention, the first and second substrate; First and second electrodes formed on the bottom surface of the first substrate and the top surface of the second substrate, respectively; A spacer formed between the first and second electrodes such that the first and second electrodes maintain a predetermined distance; A third electrode formed under the second substrate and generating touch to a touched portion on the first substrate by using an electrostatic force generated between the second electrode and the second electrode; And an adhesive layer for adhering a portion of the third electrode to the second substrate such that the third electrode is spaced apart from the second substrate by a predetermined distance.

When touched by an external object, the touched portion of the first substrate may contact the second substrate, and the second substrate may be bent by an electrostatic force generated between the third electrode and the third electrode.

The third electrode may be formed on the upper substrate of the display panel.

A touch screen for generating a capacitive touch according to an embodiment of the present invention, the first and second substrates; A first electrode formed between the first and second substrates; A second electrode formed on the lower surface of the second substrate; A third electrode formed under the second electrode and generating touch to a touched portion on the first substrate by using an electrostatic force generated between the first or second electrode; An insulating layer formed between the second and third electrodes; And an adhesive layer bonding one of the second and third electrodes to a portion of the insulating layer so that the third electrode is spaced apart from the second electrode by a predetermined interval.

The first or second electrode may be formed as an electrode layer having a predetermined pattern shape, and the insulating layer may be formed as a dot spacer of a touch panel.

A touch screen for generating a capacitive touch according to another embodiment of the present invention includes a first substrate and a first electrode constituting a touch panel having a DPW (Direct Patterned Window) structure; A second electrode formed under the first electrode and generating touch to a touched portion on the first substrate by using an electrostatic force generated between the first electrode and the first electrode; An insulating layer formed between the first and second electrodes; And an adhesive layer bonding one of the first and second electrodes to a portion of the insulating layer so that the second electrode is spaced apart from the first electrode by a predetermined distance.

The first electrode may be formed as an electrode layer having a predetermined pattern shape, and the insulating layer may be formed as a dot spacer of a touch panel.

According to the present invention, by vibrating the substrate of the touch panel using the electrostatic force generated in the place where the user's hand touches, it is possible to implement a touch screen that provides a sense of button or a variety of touch locally.

In addition, by using a single electrode layer constituting the existing touch panel as an electrode layer for transmitting the touch at the same time to minimize the added structure for the generation of touch, it is possible to prevent a decrease in yield and light transmittance on the touch screen manufacturing. have.

1 is a view showing a conventional resistive touch panel structure.
2A and 2B are diagrams illustrating a resistive touch screen according to an embodiment of the present invention.
3A and 3B are views for explaining a principle of generating a touch when an external object comes into contact with the touch screen according to the embodiment of FIGS. 2A and 2B.
4 is a block diagram of a resistive touch screen according to another embodiment of the present invention.
5 is a configuration diagram of a touch screen for generating a capacitive touch according to another embodiment of the present invention.
6 is a block diagram of a touch screen for generating a capacitive touch according to another embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a conventional resistive touch panel structure.

Referring to FIG. 1, the conventional touch panel 10 includes a first substrate 101, a first electrode 103, a spacer 105, a second electrode 107, and a second substrate 109.

The first substrate 101 coated with the first electrode 103 may be formed of a flexible film so as to be in contact with the second substrate 109 when the user touches it. The second substrate 109 may be formed of a glass substrate or a film. The first and second electrodes 103 and 107 may be formed of a transparent conductive material such as ITO on the first and second substrates 101 and 109, respectively. The spacer 105 is generally formed of a polymer material and allows the first electrode 103 and the second electrode 107 to be spaced apart without energization.

In the present invention, instead of independently configuring a touch device that is separate from the existing touch panel as shown in FIG. 1, the touch panel is used for generating a touch by simultaneously using the substrate and the electrode layer used in the touch panel as the substrate and the electrode layer for generating the touch. Implement a structure that minimizes additional configuration. The principle of generating the tactile feeling is to use attraction and repulsive force generated between one of the electrode layers of the touch panel and one additional electrode layer. In this case, one of the substrates constituting the touch panel may be used as the vibrating substrate generating the touch.

2A and 2B are configuration diagrams of a touch screen for generating a touch of a resistive film according to an embodiment of the present invention. 2A is a perspective view and FIG. 2B is a sectional view.

2A and 2B, the touch screen 20 for generating a tactile touch according to an embodiment of the present invention may include first and second substrates 201 and 209 and a bottom surface of the first substrate 201. The first electrode 203 formed on the second electrode 203, the second electrode 207 formed on the upper surface of the second substrate 209, and the first and second electrodes 203 and 207 at regular intervals. A spacer 205 formed between the second electrodes 203 and 207, a first adhesive layer 204 for bonding a part of the first and second electrodes 203 and 207, and a second substrate 209 to be formed under the spacer 205. The third electrode 211, the third substrate 213, and the third electrode which generate touch to the touched portion on the first substrate 201 using the electrostatic force generated between the second electrode 209. The second adhesive layer 210 may be bonded to the second substrate 209 and a portion of the third electrode 211 so that the 211 is positioned below the second substrate 209 by a predetermined interval. This is a structure in which a third electrode 211 and a third substrate 213 are added to the resistive touch panel structure of FIG. 1.

The method of recognizing touch positions is the same as a conventional touch panel driving method, and when transmitting a touch, the second electrode is formed by using an electrostatic force between the second electrode 207 of the touch panel and the third electrode 211 added for the tactile touch. The second substrate 209 coated with 207 may move to generate a touch on the touched object. In this case, the second substrate 209 is advantageously formed as thin as possible to bend much by the electrostatic force, and may be formed of a plastic, glass, polymer substrate, or the like. The third substrate 213 may be configured to be thicker or harder than the second substrate 209 so as not to bend when generating an electrostatic force so that the maximum force acts on the second substrate 209.

Adhesive layers (or double-sided tapes) 204 and 210 may be formed between the first electrode 203 and the second electrode 207, and between the second substrate 209 and the third electrode 211. Here, the second substrate 209 and the third electrode 211 are spaced apart by a predetermined interval by the second adhesive layer 210 and the second substrate 209 can vibrate through this space. This space may be air or may be filled with electroactive polymers or other materials of low resistance.

3A and 3B are views for explaining a principle of generating a touch when an external object comes into contact with the touch screen according to the exemplary embodiment of FIGS. 2A and 2B.

As shown in FIG. 3A, the method of recognizing a touch position is the same as the operation method of a conventional resistive touch panel. When the potential difference is applied to one electrode layer in the x-axis direction and contacted by the other electrode layer, the change in resistance or potential difference is measured to recognize the position on the x-axis, and the position of the y-axis is similarly recognized. Since the touch recognition method is well known in the art, a detailed description thereof will be omitted.

As shown in FIG. 3B, the method of generating the tactile feeling may include applying the same kind of charge to the second electrode 207 and the third electrode 211, which are one of the electrodes used for the touch position recognition, or different charges. By applying the force and repulsive force of the electric field. That is, the electric potentials of V1-, V1 + and V2- are the same and the same kind of electric charge is applied, and the electric charge is applied so that V2 + is the same as or different from the V2- electric potential.

Alternatively, as the method of using only attraction force, one of V2 + or V2- is fixed to 0V or an arbitrary potential, and a method of generating an attraction force is repeated by applying a charge to the other. Through these methods, a repulsive force or attractive force is generated by the electric field generated between the two electrodes 207 and 211 to cause the second substrate 207 to move. When the attraction and repulsive force or attraction repeatedly occurs, the second substrate 207 vibrates, and the vibration is transmitted to the touched object (finger) on the first substrate 201 as a touch. At this time, since the finger is in contact with the second substrate 207 by the pressing force, the touch can be locally transmitted only to the touched position, that is, the finger touching the second substrate 207.

The above touch function and the function of generating the touch may be performed sequentially or simultaneously. In order to process the actual touch function and the function to generate the touch at a high speed, the potentials of V1- and V1 + may not be the same even when the touch occurs, and may have a potential difference of several V to several tens of V. Although there is a potential difference between V1- and V1 +, the tactile potential difference (potential difference between V2- and V2 +) has a potential difference of several hundreds or thousands of V, and thus the influence of the potential difference between V1- and V1 + for performing a touch function is insignificant.

FIG. 4 is a diagram illustrating a resistive touch screen according to another embodiment of the present invention, in which the third substrate 213 of FIGS. 2A and 2B is configured as the upper substrate 401 of the display panel. .

In fact, in a display device having a touch recognition function, the touch panel may be formed on the display panel and used as a touch screen. In this case, as shown in FIG. 4, when the upper substrate 401 of the display panel is used as an additional substrate of the touch panel for providing a touch, the structure added to generate a touch to the existing touch screen structure may be a third structure. Only the electrode 211 is provided. Using this structure, the existing touch panel mass production line can be used as it is, and thus the touch panel can be manufactured without a decrease in production yield. This can be applied very advantageously in the manufacture of the actual product.

5 is a configuration diagram of a touch screen for generating a capacitive touch according to another embodiment of the present invention.

Referring to FIG. 5, a touch screen 50 for generating a touch according to another embodiment of the present invention may be provided between the first and second substrates 501 and 505 and the first and second substrates 501 and 505. The first electrode 503 is formed, the second electrode 507 is formed on the lower surface of the second substrate 505, formed under the second electrode, and the first or second electrodes 503, 507 The insulating layer 511 formed between the third electrode 513 and the second and third electrodes 507 and 513 to generate a touch on the touched portion on the first substrate 501 by using the electrostatic force generated between them. And an adhesive layer 509 for bonding a portion of the second electrode 507 and the insulating layer 511 so that the third electrode 513 is spaced apart from the second electrode 507 by a predetermined interval.

Here, the first electrode 503 and the second electrode 507 may be formed as an electrode layer in the form of a pattern for effective capacitance change measurement when contacting an external object.

The driving principle for generating a tactile feel is similar to that of a resistive touch panel. When an external object approaches or contacts the first substrate 501, first, a touch position is recognized by a capacitive touch panel, and one of the first electrode 503 or the second electrode 507 and the third electrode 513 are first recognized. ) To generate an electrostatic force, and transfers the touch by moving the first substrate 501 or the second substrate 505 by using the repulsive force and attraction force generated between the two electrodes (503, 507, 513).

Meanwhile, in the embodiment of FIG. 5, the touch panel parts 501, 503, 505, and 507 are used as one moving substrate. In this case, the thickness of the first substrate 501 and the second substrate 505 needs to be made as thin as possible in order to transmit the touch more effectively, and not only the first electrode 503 is disposed between the two substrates 501 and 505. An adhesive layer may be further inserted above or below the first electrode 503. In the structure of FIG. 5, since the second electrode 507 and the third electrode 513 face each other, the second electrode 507 and the third electrode 513 are used when the second electrode 507 is used to generate a touch. An insulating layer 511 is required in between. The insulating layer 511 may be formed on the upper surface of the third electrode 513 or the lower surface of the second electrode 507 as shown in FIG. 5.

6 is a configuration diagram of a touch screen for generating a capacitive touch according to another embodiment of the present invention.

Referring to FIG. 6, a touch screen 60 that generates a tactile touch according to another embodiment of the present invention may include a first substrate 601 and a first electrode constituting a touch panel having a direct patterned window (DPW) structure. 603 and a second electrode 609 formed under the first electrode 603 to generate a touch on a touched portion on the first substrate 601 by using an electrostatic force generated between the first electrode 603 and the first electrode 603. ), The insulating layer 607 formed between the first and second electrodes 603 and 609, and the second electrode 609 are spaced apart from each other by a predetermined distance below the first electrode 609. And an adhesive layer 605 for bonding a portion of the insulating layer 607.

In the present embodiment, the touch panel has a DPW structure, which is simpler than the structure of the conventional capacitive touch panel as shown in FIG. 5, so that the touch panel may be implemented using only the first substrate 601 and the first electrode 603. Can be. In addition, the adhesive layer 605, the insulating layer 607, the second electrode 609, and the second substrate 611 may be formed to locally generate a touch on the touch panel.

5 and 6, when the upper substrate of the display panel is used as additional substrates 515 and 611, a touch screen that provides a tactile touch with a very simple structure may be implemented. In addition, the insulating layers 511 and 607 may be configured not only in a layer structure covering the entire substrate, but also in the same shape as the dot spacer 105 of FIG. 1, thereby further improving transmittance. In this case, however, the dot spacing must be tight so that no electric current flows between the two electrodes with the insulating layer interposed therebetween.

The foregoing description is merely illustrative of the present invention, and various modifications may be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed according to the following claims, and all the techniques within the scope of equivalents should be construed as being included in the scope of the present invention.

101, 201, 501, 601: first substrate
103, 203, 503, 603: first electrode
107, 207, 507, 609: second electrode
109, 209, 505, 611: second substrate
211 and 513: third electrode 213 and 515: third substrate
105, 205: spacer 204, 210, 509, 605: adhesive layer
401: Display Upper Substrate 511, 607: Insulation Layer

Claims (17)

A touch panel including at least one substrate on which at least one electrode is formed; And
An additional electrode generating touch to a touched portion on the touch panel by using an electrostatic force generated between the one or more electrodes;
Touch screen for generating a tactile touch comprising a. The method of claim 1,
The additional electrode is formed on the upper substrate of the display panel, and the touch panel is formed on the additional electrode.
Touch screen to create a touch. The method of claim 1,
The touch panel may be a resistive touch panel or a capacitive touch panel.
Touch screen to create a touch. First and second substrates;
First and second electrodes formed on the bottom surface of the first substrate and the top surface of the second substrate, respectively;
A spacer formed between the first and second electrodes such that the first and second electrodes maintain a predetermined distance;
A third electrode formed under the second substrate and generating touch to a touched portion on the first substrate by using an electrostatic force generated between the second electrode and the second electrode; And
An adhesive layer for adhering a portion of the third electrode and the third electrode such that the third electrode is spaced apart from the second substrate by a predetermined distance;
Touch screen for generating a tactile touch comprising a. 5. The method of claim 4,
The space for vibrating the second substrate is formed by the adhesive layer, characterized in that
Touch screen to create a touch. 5. The method of claim 4,
When touched by an external object, the touched portion of the first substrate is in contact with the second substrate, and the second substrate is bent by the electrostatic force generated between the third electrode.
Touch screen to create a touch. 5. The method of claim 4,
Wherein the first substrate is formed of a flexible film, the second substrate is formed of plastic, glass, or polymer, and the first and second electrodes are formed of a transparent conductive material.
Touch screen to create a touch. 5. The method of claim 4,
The third electrode is formed on the upper substrate of the display panel
Touch screen to create a touch. First and second substrates;
A first electrode formed between the first and second substrates;
A second electrode formed on the lower surface of the second substrate;
A third electrode formed under the second electrode and generating touch to a touched portion on the first substrate by using an electrostatic force generated between the first or second electrode;
An insulating layer formed between the second and third electrodes; And
An adhesive layer bonding one of the second and third electrodes to a portion of the insulating layer such that the third electrode is spaced apart from the second electrode by a predetermined distance;
Touch screen for generating a tactile touch comprising a. The method of claim 9,
The insulating layer is formed on an upper surface of the third electrode, and the adhesive layer is formed between the second electrode and the insulating layer.
Touch screen to create a touch. The method of claim 9,
The first or second electrode is characterized in that formed as an electrode layer of a predetermined pattern form
Touch screen to create a touch. The method of claim 9,
The insulating layer is formed in the same shape as the dot spacer of the touch panel
Touch screen to create a touch. The method of claim 9,
The third electrode is formed on the upper substrate of the display panel
Touch screen to create a touch. A first substrate and a first electrode constituting a touch panel having a DPW (Direct Patterned Window) structure;
A second electrode formed under the first electrode and generating touch to a touched portion on the first substrate by using an electrostatic force generated between the first electrode and the first electrode;
An insulating layer formed between the first and second electrodes; And
An adhesive layer bonding one of the first and second electrodes to a portion of the insulating layer such that the second electrode is spaced apart from the first electrode by a predetermined distance;
Touch screen for generating a tactile touch comprising a. The method of claim 14,
The insulating layer is formed on an upper surface of the second electrode, and the adhesive layer is formed between the first electrode and the insulating layer.
Touch screen to create a touch. The method of claim 14,
The insulating layer is formed in the same shape as the dot spacer of the touch panel
Touch screen to create a touch. The method of claim 14,
The second electrode is formed on the upper substrate of the display panel
Touch screen to create a touch.

Images