KR20150096104A - Display Device Having Tri-axis Sensing Type Capacitive Touch Screen - Google Patents

Abstract

According to the present invention, a display device including a triple-axis capacitive touchscreen includes: a window (10) which is applied directly with a conductor′s touch and elastically and resiliently adjusts the position to the original position in the vertical direction when an external force is applied by the touch; a display unit (20) which is laminated on the lower part of the window and adjusts the position in the vertical direction linked to the change in the vertical position of the window (10); and a triple-axis capacitive touchscreen (30) including a location sensor (31) which detects the location of the touch applied to the window (10) to generate a first input signal corresponding to the corresponding touch location and a capacitive pressure sensor (32) which detects the touch pressure applied to the window (10) to generate a second input signal in response to the corresponding touch pressure and combining the first and second input signals to generate the final target input signal. The capacitive location sensor (31) is installed on the upper part, lower part, or the inside of the display unit (20). The capacitive pressure sensor (32) includes: a first electrode (32a) which adjusts the position in the vertical position linked to the vertical position movement of the window (10) and a second electrode (32b) which is installed and fixed in a location spaced apart from the first electrode (32a) by a predetermined distance (d). The second input signal is generated by a change in the capacitance according to the change of the recoverable distance (d) between the first and second electrodes (32a, 32b) occurred by the vertical position change of the first electrode (32a) linked to that of the window (10).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device having a capacitive touch screen,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device having a three-axis recognizable capacitive touch screen, and more particularly, to a capacitive type position sensor for detecting a touch position and a capacitive pressure sensor for detecting a touch pressure And a display device having a three-axis recognizable capacitive touch screen for generating a final input signal by combining an input signal with respect to a touch position detected by both detection sensors and a touch pressure.

The touch screen, which is one of the input devices, can be used for a variety of portable terminals such as a mobile phone, an MP3 player, a PDA, a PMP, a PSP, a portable game machine, and a DMB receiver from various monitors such as a navigation device, an industrial terminal, Of course, it is widely used as an input device for various electric and electronic devices ranging from a refrigerator, a microwave oven, and a washing machine to various home appliances.

The touch screen has been developed in various ways such as a resistance film type and a capacitance type according to its structure and operation principle, and recently, a capacitance type is widely applied in a smart phone.

The capacitive touch screen detects the capacitance generated when a finger such as a finger touches (makes it close), determines the position of the finger at which position the finger comes in contact (within a certain distance) A touch screen provided with a capacitive position sensor for generating a corresponding input signal, and an electrostatic discharge generating circuit for generating an input signal corresponding to the touch pressure from the magnitude of capacitance change occurring differently depending on the magnitude of the finger touch pressure, Capacity type pressure sensor ', and' capacitive type position sensor 'is mainly applied to a touch screen of a smart phone.

As a conventional technology relating to a capacitive pressure sensor type touch screen (input device), there are known an input device of Korean Patent No. 10-0661000 and a capacitive type electrostatic charger using a nanofibrous web of Korean Patent No. 10-1248410 Capacity pressure sensor '.

As another example of the conventional technology related to the capacitive touch screen, Korean Patent No. 10-1097869 'Capacitive Hybrid Touch Screen' has been proposed. The hybrid touch screen is a touch screen that recognizes three axes instead of two axes (Position detecting-touch screen module) for detecting a touch position (XY axis of the plane coordinate) of a conductor (e.g., a finger) to generate a first input signal, and a capacitance type position sensor And a capacitance type pressure sensor (pressure detection-touch screen module) for detecting a touch pressure (Z-axis) transmitted from a touch to the capacitance type position sensor and generating a second input signal.

The three-axis recognized capacitive touch screen includes a first input signal (XY axis) relating to a touch position from the capacitive position sensor and a second input signal Z (XY axis) relating to a touch pressure from the capacitive pressure sensor. Axis) to generate a desired final input signal. According to the touch screen of this' 869, the conventional touch sensor of the capacitive type position sensor which detects only the position to generate the input signal improves the simplicity of the input contents It was possible.

2. Description of the Related Art [0002] In general, touch screens are vertically stacked together with a display device (e.g., LCD) for displaying predetermined contents, and devices incorporating touch screens and display devices are widely proposed. 10-0493921, 'Capacitive input / display device' of Korean Patent No. 10-0894250, 'Touch screen integrated liquid crystal display device' of Korean Patent No. 10-1131314, and Korean patent 10-1067164 " Touch Screen Integrated Display Device ".

Among the devices in which the touch screen and the display devices are integrated, for example, a touch screen is embedded in the display device or the electrode of the display device is used as the electrode of the touch screen, for example, CELL, and IN-CELL type liquid crystal display devices have been proposed. Examples of such liquid crystal display devices include 'touch screen panel built-in liquid crystal display device' of Korean Patent No. 10-1230196 and 'touch panel built-in liquid crystal display ', A' touch screen built-in liquid crystal display device 'of Korean Patent No. 10-1260665, and a' touch sensor built-in display device 'of Korean Patent Publication No. 10-2013-0033641.

The conventional capacitive pressure sensor 100, which is known from the above-mentioned 'Korean Patent No. 10-0661000' input device and applied to the touch screen as shown in FIG. 5, (Elastic layer) 130 formed of elastic silicone rubber or spring or the like is interposed between the lower electrode 110 and the upper electrode 120 stacked on the lower electrode 110 and the upper electrode 120. A window 140 for protecting the lower electrode is laminated on the upper electrode 120 and a substrate 150 for providing a ground for fixing the lower electrode 120 is formed on the lower side of the lower electrode 120. [ ) Are stacked.

Such a conventional capacitive pressure sensor 100 is applied to an elastic spacer 130 (elastic layer) that elastically changes a certain distance d between the lower electrode 110 and the upper electrode 120 Is essential. That is, the elastic spacer 130 maintains the distance d between the lower electrode 110 and the upper electrode 120 when no external pressure is applied. When the external pressure is applied to the lower electrode 110 and the upper electrode 120, The distance d between the lower electrode and the upper electrode is changed (shortened) so that the capacitance between the lower electrode and the upper electrode is changed (increased) so that an input signal is generated corresponding to the capacitance change. Thereby restoring the distance d between the electrodes to the original distance. Therefore, in the case of the conventional capacitive pressure sensor 100, the elaborateness of the elastic spacer 130 is a major factor for determining the quality of the touch screen.

The conventional capacitive pressure sensor type touch screen in which the elastic spacer 130 is applied between the lower electrode and the upper electrode as described above has the following problems.

First, in order to maintain an appropriate level of quality for the capacitive pressure sensor, the elastic characteristics of the elastic spacer 130 (for example, elastic silicone rubber or spring) must be precisely set, and the elasticity of the lower electrode 110 and the upper electrode Lt; RTI ID = 0.0 > 120 < / RTI >

Secondly, the elastic characteristics of the elastic spacer 130 may be altered by repeated expansion and contraction according to the accumulation of the use period, and malfunction may occur in the input operation of the touch screen.

Third, since the thickness of the elastic spacer 130 is not easily reduced due to the characteristic of the elastic spacer 130 mediated between the lower electrode 110 and the upper electrode 120, it is difficult to reduce the thickness of the capacitive pressure sensor , And as a result, a final product (e.g., a smart phone) having a capacitive pressure sensor to which the elastic spacer 130 is applied is not favorable for miniaturization of the product.

Fourthly, due to the elastic characteristics of the elastic rubber or the spring serving as the material of the elastic spacer 130, the change reaction of the distance d due to the change of the external pressure may be delayed, and as a result, And malfunction may occur due to a delay in the return of the electrode due to the reaction delay of the elastic spacer 130 in the continuous operation, for example.

Fifth, in the case of a conventional technology in which a capacitive pressure sensor is laminated between a housing and a window mounted thereon, the window must be spaced from the housing in order to operate the capacitive pressure sensor. In this case, Entering can cause malfunctions.

It is an object of the present invention to provide a three-axis recognizable capacitive touch screen in which a capacitance type position sensor for detecting the position of the XY-axis plane coordinate and a capacitive pressure sensor for detecting the pressure in the Z- Regarding one display device, as a capacitive pressure sensor, an elastic spacer (elastic layer) is mediated between upper and lower electrodes (lower electrode and upper electrode) to elastically change a certain distance between upper and lower electrodes In order to solve the above-mentioned problems in applying the structure of the present invention.

According to the present invention, there is provided a display device having a three-axis recognizable capacitive touch screen.

A display device according to the present invention includes a window, a display portion, and a three-axis recognizable capacitive touch screen.

The touch of the conductor is directly applied to the window, and when an external force is applied by the touch, the window is resiliently displaced upward and downward resiliently.

The display unit is stacked on the lower side of the window and is vertically displaced in conjunction with the vertical displacement of the window.

The three-axis recognized capacitive touch screen includes a capacitive position sensor and a capacitive pressure sensor.

Wherein the capacitive position sensor detects a touch position applied to the window to generate a first input signal corresponding to the touch position, the capacitive pressure sensor detects a touch pressure applied to the window, And combines the first input signal and the second input signal to produce a desired final input signal.

In the present invention, the combination of the first input signal and the second input signal to generate the final input signal means that the final input signal is generated by using only the first input signal, using only the second input signal, ≪ / RTI >

The capacitive type position sensor is installed on the upper portion, the lower portion, or the inside of the display portion.

The capacitive pressure sensor includes a first electrode which is displaced upward and downward relative to a vertical displacement of the window and a second electrode which is fixedly spaced apart from the first electrode by a predetermined distance, The second input signal is generated from a change in capacitance due to the restorable distance change between the first electrode and the second electrode due to the up-and-down displacement of the first electrode.

One electrode of the first electrode and the second electrode may be a single electrode, and the other electrode may be divided into a plurality of electrodes.

The first electrode may not be formed separately, and an electrode applied to the display unit or an electrode applied to the capacitive position sensor may be used as the first electrode.

The space between the first electrode and the second electrode spaced apart by the distance may be formed as an empty space filled with air, or a displacement of the first electrode through the buffer spring, flexible silicone or tape It can be buffered.

According to the display device having a three-axis recognizable capacitive touch screen according to the present invention, in constructing the capacitive pressure sensor constituting a part of the three-axis recognizable capacitive touch screen, the application of the elastic spacer between the upper and lower electrodes The distance between the upper and lower electrodes of the capacitive pressure sensor can be restored by using the inherent elastic characteristics of a window (for example, tempered glass) laminated on the uppermost layer for the purpose of protecting the elements of the display device of the present invention A complicated process of precisely setting the elastic characteristics of the elastic spacer and mediating it between the upper and lower electrodes can be eliminated and it is possible to eliminate the complicated process of resiliently changing the distance between the upper and lower electrodes The operation of varying the elasticity of the window is substantially semi-permanently ensured by the inherent elastic characteristics of the window, It is possible to shorten the distance between the upper and lower electrodes compared with the case where the elastic spacer is applied, so that it is not only useful for miniaturization of the final product (for example, smart phone) but also because of the inherent elastic characteristics There is an effect that the reaction of changing the distance between the upper and lower electrodes according to the change of the pressure can be realized quickly and uniformly without delay so that the reactivity of the touch screen provided in the display device can be improved.

1 is a schematic diagram of a display device having an exemplary three-axis recognized capacitive touch screen according to the present invention,
2 is a schematic diagram of another exemplary display device according to the present invention,
3 is an exploded view of an exemplary capacitive pressure sensor applied to the present invention,
4 is an operational diagram of an exemplary display device according to the present invention;
5 is a schematic diagram of a conventional capacitive pressure sensor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device having a three-axis recognizable capacitive touch screen according to the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are merely illustrative of the display device according to the present invention, and are not intended to limit the scope of the present invention.

1 to 3, a display device 1 having a three-axis recognizing capacitive touch screen according to the present invention basically includes a window 10, a display portion 20, and a capacitive touch screen (30), wherein the capacitive touch screen (30) includes a capacitive position sensor (31) and a capacitive pressure sensor (32).

The window 10 is used to protect a display panel (e.g., LCD) of a display device or a touch panel of a touch screen or the like in electrical and electronic devices such as a smart phone And is a transparent thin plate-like high strength member covering the upper surface of the display and input device.

In the display device 1 of the present invention, generation of the capacitance in the capacitive position sensor 31 is performed by touching a conductor such as a finger to the window 10, that is, By approaching the conductor within a certain distance.

The window 10 is rigidly mounted to the housing 2 of the smartphone by being joined to and supported by the housing 2 of the smartphone with its outer rim portion positioned below as illustrated in Fig.

When an external force is applied to the touch region of the window 10 from top to bottom according to the intrinsic inherent elastic characteristics of the window 10, the window 10 is bent in a downwardly convex shape by an area not supported by the housing 2, 10 is displaced downward and the window 10 is restored to its original position by the elasticity thereof when the external pressure applied is extinguished, and the resilient and elastic resilience of the window 10 The displacement remains substantially non-dense without denaturation unless the window 10 is broken.

As the material of the window 10 to be applied to the present invention, a transparent 'tempered glass' such as 'Gorilla glass' which is widely used at present in a smart phone or the like is preferable, and the above- Other materials, such as transparent 'plastic panels', may be applied to transparent materials with inherent elastic properties that can be provided.

The display unit 20 is a general display device such as an LCD that is widely applied to a smart phone or the like and displays contents related to use of a smartphone. In accordance with an aspect of the present invention, And is vertically displaced in conjunction with the vertical displacement of the window 10.

That is, the display unit 20 is mounted in the housing 2 of the smartphone, but is physically constrained only to the window 10 and is not constrained to the housing 2 so that when the window 10 is displaced up and down, (20) are also displaced up and down. Therefore, the housing 2 of the smartphone, which is located around the display unit 20, is designed to guide the display unit 20 without interfering with the vertical movement of the display unit 20. [

The configuration and operation of the display unit 20 itself as a display device installed in a smart phone or the like are not directly related to the present invention and the technology of the relevant field can be applied to the present invention and a detailed description thereof will be omitted.

The capacitive touch screen 30 is a three-axis recognizable capacitive touch screen capable of recognizing a touch position (XY axis) and a touch pressure (Z axis). As described above, the capacitance type position sensor 31 And a capacitive pressure sensor 32,

The capacitance type position sensor 31 detects a touch position applied to the window 10 to generate a first input signal corresponding to the touch position and the capacitance type pressure sensor 32 detects a touch And generates a second input signal corresponding to the touch pressure.

According to the capacitive touch screen 30 applied to the present invention, when pressure is applied while touching a predetermined position of the window 10 with a conductor such as a finger as described in Korean Patent No. 10-1097869, The capacitance position sensor 31 generates a first input signal corresponding to the touch position, the capacitive pressure sensor 32 generates a second input signal corresponding to the touch pressure, And a second input signal to generate a desired final input signal corresponding to the touch and the pressure.

The first input signal generated by the capacitive position sensor 31 is a relatively large number of input signals ranging up to several tens and the second input signal generated by the capacitive pressure sensor 32 is the The size is a relatively small number of input signals such as, for example, two steps (pressure below a certain reference value and pressure above a reference value) or three steps (pressure at a certain section, pressure below a certain section, .

Therefore, according to the present invention in which the capacitive touch screen 30 is applied, only the first input signal can be used as the final input signal in the case where only the touch position is required, depending on the characteristics of the final input signal, When only the pressure is required, only the second input signal can be used as a desired final input signal. When both the touch position and the touch pressure are required, the first input signal and the second input signal are combined (i.e., It is possible to generate a desired final input signal. Thus, by building related software to utilize these various combinations of input signals, it is possible to appropriately generate various input signals according to needs.

When a capacitive touch screen 30 according to the present invention is used as a keypad of a smart phone for inputting Korean characters, for example, when a screen position corresponding to one key is pressed with a weak pressure, "a" When the screen position is set to medium pressure, "k" is input, and if the same screen position is pressed with a strong pressure, "ㄲ" can be input.

The capacitive position sensor 31 for detecting the XY coordinate position in the three-axis recognizing capacitive touch screen 30 applied to the display device 1 of the present invention is provided on the upper, Install it. That is, the capacitance type position sensor 31 can be formed independently of the display portion 20 and laminated and bonded to the upper or lower portion of the display portion 20 in an insulated state or embedded in the display portion 20.

More specifically, the full capacity type position sensor 31 is disposed below the window 10 and does not interfere with the upward and downward displacement of the display unit 10 interlocked with the window 10, G2, ON-CELL, and IN-CELL as long as the first electrode 32a of the first window 32 does not interfere with the vertical movement of the window 10. [

The embodiment shown in Fig. 1 schematically shows the case where the capacitive position sensor 31 is embedded in the display unit 20. Fig. When the capacitive position sensor 31 is positioned above the display unit 20, by applying the electrodes of the capacitive position sensor 31 as a transparent electrode, the capacitive position sensor 31 is placed on the display unit 20, It is possible to minimize the degradation of the sharpness of the display panel 20.

As is widely known, the capacitive position sensor 31 can be formed by, for example, coating ITO (Indium Tin Oxide) with upper X-axis electrodes and lower Y-axis electrodes insulated in a vertical matrix arrangement . Of course, the electrode of the capacitance type position sensor 31 may be formed as a single layer electrode instead of the upper and lower layers.

The configuration of the capacitance type position sensor 31 itself is not directly related to the present invention, and the conventional technique can be applied to the present invention, and a detailed description thereof will be omitted.

The capacitive pressure sensor 32 for detecting the touch pressure (Z axis) in the three-axis recognizable capacitive touch screen 30 applied to the display device 1 of the present invention is configured such that the first and second electrodes (32a) and a second electrode (32b).

The first electrode 32a is one side (upper side) electrode necessary for constituting a well-known capacitive pressure sensor, and the second electrode 32b is one side (lower side) electrode necessary for constituting a well-known capacitive pressure sensor. And the upper and lower electrodes 32a and 32b may be formed of a conductive material such as a coating of ITO, copper (copper), or silver.

The first electrode 32a is a moving electrode which is displaced upward and downward in conjunction with the vertical displacement of the window 10 and the second electrode 32b is a moving electrode of a distance d from the first electrode 32a downward, Is a process electrode spaced apart and fixed to the base surface (3).

1, the first electrode 32a is laminated and adhered to the bottom surface of the display unit 20, and the first electrode 32a is formed by vertically displacing the window 10, And is displaced up and down in association with the vertical displacement of the arm 20.

The distance d between the second electrode 32b fixed to the lower side of the first electrode 32a and the first electrode 32a at a predetermined distance d is smaller than the distance d between the second electrode 32b and the first electrode 32a, Depending on the pressure, thereby causing a capacitance change between the first electrode and the second electrode, from which a second input signal is generated.

That is, as shown in FIG. 4B, when the touch pressure P is applied from above to displace the position of the first electrode 32a downward, the gap between the first electrode 32a and the second electrode 32b The distance d between the first electrode 32a and the second electrode 32b varies (decreases) with the change of the distance, and the formula of C = μA / d (where C is capacitance, (D) is the capacitance between the two electrodes, which is proportional to the magnitude of the touch pressure. In this case, the capacitance change corresponds to the magnitude of the change in the distance d between the two electrodes The capacitance type pressure sensor 31 can identify the magnitude of the applied pressure and generate different input signals.

When the touch pressure on the window 10 disappears, the first electrode 32a is moved to the original position by the upward movement of the display unit 20 and the upward movement of the first electrode 32a due to the elastic restoration of the window 10, Position, and the first electrode 32a and the second electrode 32b maintain the original predetermined distance d again (Fig. 4A).

The specific arrangement and arrangement of the first electrode 32a and the second electrode 32b of the capacitive pressure sensor 32 are determined by the relationship between the capacitance of the first electrode 32a and the second electrode 32b, A 'single electrode' covering the entire bottom surface of the display unit 20 is used as the first electrode 32a, and a 'single electrode' is used as the second electrode 32b A plurality of electrodes (for example, six electrodes) are arranged along the outer edge of the display unit 20. The first electrode 32a may include a plurality of Electrode 'may be applied to the second electrode 32b and the' single electrode 'may be applied to the second electrode 32b.

In FIG. 3, a point where the first electrode 32a and the second electrode 32b are overlapped with each other (six points where the second electrode is located in the case of the embodiment shown in FIG. 3) Sensing point " that causes a capacitance change due to the vertical displacement, and detects the magnitude of the applied touch pressure from the combination of capacitance change amounts measured at these sensing points.

The first electrode 32a of the capacitance type pressure sensor 32 is not separately formed if the display device 1 of the present invention is normally operated in constructing the display device 1 of the present invention, An electrode applied to the display portion 20 or an electrode applied to the capacitance type position sensor 31 can be used as the first electrode 32a. If the first electrode 32a is not separately formed but is used in combination with other existing electrodes, the thickness of the display device 1 of the present invention can be reduced. As a result, Can be reduced.

As described in the background art, in the conventional capacitive pressure sensor, the elastic spacers 130 (refer to FIG. 5) mediated between the upper and lower electrodes maintain a constant distance d between the upper and lower electrodes, The capacitive pressure sensor 32 applied to the present invention has a function of restricting the distance d between the first electrode 32a and the second electrode 32b, The window 10 performs the action of resiliently varying the distance d in a resilient manner, rather than the conventional elastic spacer 130.

Therefore, the space between the first electrode 32a and the second electrode 32b that are vertically spaced apart is not the elastic spacer 130 of FIG. 5 stacked, but only the air 33 is charged As shown in FIG. 2, only the air 33 can be held in the filled space, and the buffer spring 34 can be mounted on the rim portion. As shown in FIG. 3, The silicon 35 may be filled or the flexible tape 36 may be adhered to the air 33, the silicon 35 and the tape 36 filled in the space.

The buffer spring 34, the silicon 35 and the tape 36 mediated by the space between the first electrode 32a and the second electrode 32b are connected to the first electrode 32a displaced downward by the touch pressure, But does not act to provide resilience to restore the first electrode 32a to its original position, but rather acts to buffer the movement downward of the first electrode 32a only while accepting the meaning of the displacement of the first electrode 32a downward Only.

The display device 1 having the three-axis recognizing capacitive touch screen according to the present invention as described above can be applied to a display device which is dependent on the vertical displacement of the window 10, The first electrode 32a is displaced up and down by the vertical displacement of the first electrode 32 to cause a change in capacitance due to a change in distance between the first electrode and the second electrode and to generate a second input signal therefrom The operation of elastically varying the distance between the first electrode and the second electrode in a resilient manner due to the inherent elastic characteristics of the window 10 represented by the tempered glass is maintained almost semipermanently The distance between the first electrode and the second electrode due to the touch pressure is reduced and the thickness of the first electrode can be reduced by reducing the distance between the first electrode and the second electrode without causing a malfunction due to the modification of the elastic characteristics,So that the reaction is improved and the manufacturing process can be simplified and the cost can be reduced.

In addition, in the prior art in which the window is separated from the housing in order to stack the capacitive pressure sensor between the housing and the window mounted on the housing, foreign substances may flow into the separated space between the window and the housing, The present invention is applicable to a case where a space 10 is provided between the window 10 and the housing 2 without the capacitive pressure sensor 32 installed between the window 10 and the housing 2, There is no fear of malfunction due to the inflow of foreign matter into this space.

1: Display device of the present invention
2: Housing of Smartphone
3:
10: Windows
20:
30: 3-axis sensing capacitive touch screen
31: Capacitive Position Sensor
32: Capacitive pressure sensor
32a: first electrode
32b: second electrode
33: air
34: buffer spring
35: Silicon
36: tape

Claims (4)

A window 10 to which a touch of a conductor is directly applied and which is resiliently displaced up and down in an original manner when an external force is applied by a touch;
A display unit 20 stacked on the lower side of the window 10 and displaced up and down in conjunction with the vertical displacement of the window 10; And
A capacitive position sensor 31 for detecting a touch position applied to the window 10 and generating a first input signal corresponding to the touch position, and a touch sensor 32 for detecting a touch pressure applied to the window 10, And a capacitive pressure sensor (32) for generating a second input signal corresponding to the first input signal and the second input signal, wherein the first input signal and the second input signal are combined to produce a desired final input signal, Type touch screen (30); Lt; / RTI >
Here, the capacitive position sensor 31 is installed in the upper portion, the lower portion, or the inside of the display portion 20;
The capacitive pressure sensor 32 includes a first electrode 32a displaced upward and downward in conjunction with a vertical displacement of the window 10 and a second electrode 32a spaced apart from the first electrode 32a by a predetermined distance d. And a second electrode 32b is provided between the first electrode 32a and the second electrode 22b due to the vertical displacement of the first electrode 32a generated in conjunction with the vertical displacement of the window 10. [ Wherein the second input signal is generated from a capacitance change in accordance with a change in the distance (d) that can be recovered by the first touch sensor. The method according to claim 1,
Wherein one electrode of the first electrode (32a) and the second electrode (32b) is a single electrode, and the other electrode is divided into a plurality of divided electrodes. A display device having a touch screen. 3. The method according to claim 1 or 2,
An electrode applied to the display unit 20 or an electrode applied to the capacitive position sensor 31 may be used as the first electrode 32a without forming the first electrode 32a separately. , A three-axis-recognized capacitive touch screen. 3. The method according to claim 1 or 2,
The space between the first electrode 32a and the second electrode 32b spaced apart by the distance d may be an empty space filled with the air 33 or a space between the buffer spring 34 and the flexible silicon 35 ) Or the tape (36) to buffer the displacement of the first electrode (32a) downward.

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