KR20160137931A - Touch input device - Google Patents

Abstract

The present invention relates to a touch input device. According to the present invention, the touch input device, capable of detecting the pressure of a touch to a touch surface, includes a display panel and a pressure electrode provided under the display panel. If pressure is applied to the touch surface, the display panel is bent. As the display panel is bent, the electrical characteristic detected by the pressure electrode is changed. The size of the pressure applied to the touch surface is detected depending on the variation of the electronic characteristic, and the display panel includes first and second areas. On the assumption that pressure detection sensitivity of the first area is higher than that of the second area, and the display panel is bent at the same degree, the variation of the electrical characteristic detected when pressure is applied to the first area may be greater than the variation of the electrical characteristic detected when pressure is applied to the second area.

Description

A touch input device {TOUCH INPUT DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch input device, and more particularly, to a touch input device including a display panel and a touch input device configured to detect touch pressure of a predetermined size according to a touch position.

Various types of input devices are used for the operation of the computing system. For example, an input device such as a button, a key, a joystick, and a touch screen is used. Due to the easy and simple operation of the touch screen, the use of the touch screen in the operation of the computing system is increasing.

The touch screen may comprise a touch surface of a touch input device including a touch sensor panel, which may be a transparent panel having a touch-sensitive surface. Such a touch sensor panel may be attached to the front of the display screen such that the touch-sensitive surface covers the visible surface of the display screen. The user simply touches the touch screen with a finger or the like so that the user can operate the computing system. Generally, a computing system is able to recognize touch and touch locations on a touch screen and interpret the touch to perform operations accordingly.

At this time, there is a need for a touch input device capable of detecting touch pressure of a predetermined size according to the touch position on the touch screen without deteriorating the performance of the display panel.

The present invention is to provide a touch input device including a display panel capable of detecting a touch pressure of the same size regardless of a position where a pressure is applied when a pressure of the same size is applied.

A touch input device according to an embodiment of the present invention is a touch input device capable of detecting pressure of a touch on a touch surface. And a pressure electrode disposed at a lower portion of the display panel. When a pressure is applied to the touch surface, the display panel is bent, electrical characteristics sensed by the pressure electrode change as the display panel is bent, Wherein the display panel detects a magnitude of a pressure applied to the touch surface in accordance with a change amount of an electrical characteristic, the display panel includes a first area and a second area, and the pressure detection sensitivity of the first area is a pressure detection The change amount of the electrical characteristic sensed when the pressure is applied to the second region is larger than the change amount of the electrical characteristic sensed when the pressure is applied to the first region under the condition that the sensitivity of the display region is higher than that of the display region, .

An electrode sheet according to an embodiment of the present invention is disposed in a touch input device including a display panel and used for pressure detection of a touch on a touch surface of the touch input device, Insulating layer; And a pressure electrode positioned between the first insulating layer and the second insulating layer, wherein when a pressure is applied to a touch surface of the touch input device, the display panel is warped, and when the display panel is warped, Wherein an electrical characteristic sensed by the pressure electrode is changed and a magnitude of a pressure applied to the touch surface is detected according to an amount of change of the electrical characteristic, the display panel includes a first region and a second region, Is higher than the pressure detection sensitivity of the second area and the curvature of the display panel is the same, the pressure in the second area is lower than the variation in the electrical characteristic sensed when the pressure is applied to the first area The amount of change in the electrical characteristics sensed when applied can be made larger.

According to the present invention, it is possible to provide a touch input device including a display panel capable of detecting a touch pressure of the same size regardless of a position where a pressure is applied when a pressure of the same size is applied.

FIG. 1 is a schematic view of a capacitive touch sensor panel according to an embodiment of the present invention and a configuration for its operation.
FIGS. 2A, 2B, and 2C are conceptual diagrams illustrating relative positions of a touch sensor panel with respect to a display panel in a touch input device according to an embodiment of the present invention.
3 is a cross-sectional view of a touch input device configured to detect a touch position and a touch pressure according to an embodiment of the present invention.
4A and 4E are cross-sectional views of a touch input device according to an embodiment of the present invention.
4B, 4C and 4D are cross-sectional views of a part of the touch input device according to the embodiment of the present invention.
4F is a perspective view of the touch input device according to the embodiment of the present invention.
5A is a cross-sectional view of an exemplary electrode sheet including a pressure electrode for attaching to a touch input device according to an embodiment of the present invention.
5B is a cross-sectional view of a portion of the touch input device in which the electrode sheet is attached to the touch input device according to the first method.
5C is a plan view of an electrode sheet for attaching an electrode sheet to a touch input device according to a first method.
5D is a cross-sectional view of a portion of a touch input device in which an electrode sheet is attached to a touch input device according to a second method.
6A and 6B are sectional views of a part of a touch input device according to the first embodiment of the present invention.
7A, 7B, 7C, 7D, 7E and 7F are sectional views of a part of a touch input device according to a second embodiment of the present invention.
8A and 8B are cross-sectional views of the touch input device shown in FIG. 7A when pressure is applied according to the first method in the embodiment of the present invention.
Figs. 8C and 8D are cross-sectional views of the touch input device shown in Fig. 7B when pressure is applied according to the second method in the embodiment of the present invention. Fig.
Figs. 8E and 8F are cross-sectional views of the touch input device shown in Fig. 7C when pressure is applied according to the third method in the embodiment of the present invention. Fig.
FIGS. 8G and 8H are cross-sectional views of the touch input device shown in FIG. 7D when pressure is applied according to the fourth method in the embodiment of the present invention. FIG.
Figs. 8I and 8J are cross-sectional views when pressure is applied to the touch input device shown in Fig. 7E according to the first method in the embodiment of the present invention. Fig.
8K and 8L are sectional views when pressure is applied to the touch input device shown in Fig. 7F according to the second method in the embodiment of the present invention.
9 to 14 illustrate pressure electrodes that can be applied to the first and second embodiments of the present invention, respectively.
FIGS. 15A, 15B, 15C, and 15D illustrate graphs illustrating the pressure electrodes applied to the embodiment of the present invention and the amount of capacitance change according to the touch position of the touch input device having such pressure electrodes.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, a touch input device according to an embodiment of the present invention will be described with reference to the accompanying drawings. Hereinafter, the capacitive touch sensor panel 100 and the pressure detection module 400 are illustrated, but the touch sensor panel 100 and the pressure detection module 400 capable of detecting a touch position and / ) Can be applied.

FIG. 1 is a schematic diagram of a capacitive touch sensor panel 100 according to an embodiment of the present invention and its configuration for operation. 1, a touch sensor panel 100 according to an embodiment of the present invention includes a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm, A driving unit 120 for applying a driving signal to the plurality of driving electrodes TX1 to TXn for operation and a sensing unit 120 for sensing information including a capacitance change amount that varies depending on a touch on the touch surface of the touch sensor panel 100 And a sensing unit 110 for receiving a signal and detecting a touch and a touch position.

As shown in FIG. 1, the touch sensor panel 100 may include a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm. 1, a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm of the touch sensor panel 100 are shown as an orthogonal array. However, the present invention is not limited to this, The driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may have any number of dimensions including its diagonal, concentric and three-dimensional random arrangement, and its application arrangement. Here, n and m are positive integers and may be the same or different from each other, and the size may be changed according to the embodiment.

As shown in FIG. 1, the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be arranged to cross each other. The driving electrode TX includes a plurality of driving electrodes TX1 to TXn extending in a first axis direction and a receiving electrode RX includes a plurality of receiving electrodes extending in a second axis direction intersecting the first axis direction RX1 to RXm).

In the touch sensor panel 100 according to the embodiment of the present invention, the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed in the same layer. For example, a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm may be formed on the same surface of an insulating film (not shown). In addition, the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed in different layers. For example, the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on both sides of an insulating film (not shown), or a plurality of driving electrodes TX1 to TXn A plurality of receiving electrodes RX1 to RXm may be formed on one surface of a first insulating film (not shown) and a second insulating film (not shown) different from the first insulating film.

A plurality of drive electrodes (TX1 to TXn) and a plurality of receiving electrodes (RX1 to RXm) is a transparent conductive material (e.g., tin oxide (SnO ₂₎ and indium oxide _{(In 2 O 3) ITO (} Indium Tin made of such Oxide) or ATO (antimony tin oxide)). However, this is merely an example, and the driving electrode TX and the receiving electrode RX may be formed of another transparent conductive material or an opaque conductive material. For example, the driving electrode TX and the receiving electrode RX may include at least one of silver ink, copper, or carbon nanotube (CNT). The driving electrode TX and the receiving electrode RX may be formed of a metal mesh or may be formed of a nano silver material.

The driving unit 120 according to the embodiment of the present invention may apply a driving signal to the driving electrodes TX1 to TXn. In an embodiment of the present invention, the driving signal may be sequentially applied to one driving electrode at a time from the first driving electrode TX1 to the nth driving electrode TXn. This application of the driving signal can be repeated again. This is merely an example, and driving signals may be simultaneously applied to a plurality of driving electrodes according to an embodiment.

The sensing unit 110 may include information about capacitance Cm 101 generated between the driving electrodes TX1 to TXn and the receiving electrodes RX1 to RXm to which driving signals are applied through the receiving electrodes RX1 to RXm The touch position and the touch position can be detected. For example, the sensing signal may be a signal coupled to the driving electrode TX by a capacitance CM (101) generated between the driving electrode TX and the receiving electrode RX. The process of sensing the driving signal applied from the first driving electrode TX1 to the nth driving electrode TXn via the receiving electrodes RX1 to RXm is referred to as scanning the touch sensor panel 100 can do.

For example, the sensing unit 110 may include a receiver (not shown) connected to each of the reception electrodes RX1 to RXm through a switch. The switch is turned on during a time period in which the signal of the corresponding receiving electrode RX is sensed so that the sensing signal can be sensed from the receiving electrode RX at the receiver. The receiver may be comprised of an amplifier (not shown) and a feedback capacitor coupled between the negative input of the amplifier and the output of the amplifier, i. E., The feedback path. At this time, the positive input terminal of the amplifier may be connected to the ground. In addition, the receiver may further include a reset switch connected in parallel with the feedback capacitor. The reset switch can reset the conversion from current to voltage performed by the receiver. A negative input terminal of the amplifier may be connected to the corresponding receiving electrode RX to receive a current signal including the information about the capacitance (CM) 101, integrate the current signal, and convert the current signal into a voltage. The sensing unit 110 may further include an analog-to-digital converter (ADC) for converting the integrated data to digital data through the receiver. The digital data may then be input to a processor (not shown) and processed to obtain touch information for the touch sensor panel 100. The sensing unit 110 may be configured to include an ADC and a processor together with a receiver.

The control unit 130 may control the operation of the driving unit 120 and the sensing unit 110. For example, the controller 130 generates a driving control signal, and transmits the driving control signal to the driving unit 120 so that the driving signal is applied to the driving electrode TX preset at a predetermined time. The control unit 130 generates a sensing control signal and transmits the sensing control signal to the sensing unit 110. The sensing unit 110 receives a sensing signal from a predetermined receiving electrode RX at a predetermined time to perform a predetermined function can do.

In FIG. 1, the driving unit 120 and the sensing unit 110 may constitute a touch detection device (not shown) capable of detecting whether the touch sensor panel 100 is touched or touched according to the embodiment of the present invention . The touch sensing apparatus according to the embodiment of the present invention may further include a controller 130. [ The touch detection device according to the embodiment of the present invention may be integrated on a touch sensing integrated circuit (IC) (not shown) as a touch sensing circuit in the touch input device 1000 including the touch sensor panel 100 . The driving electrode TX and the receiving electrode RX included in the touch sensor panel 100 are connected to the touch sensing IC through a conductive trace and / or a conductive pattern printed on the circuit board, And may be connected to the driving unit 120 and the sensing unit 110 included. The touch sensing IC can be placed on a circuit board on which a conductive pattern is printed. The touch sensing IC may be mounted on a main board for operating the touch input device 1000 according to an embodiment.

As described above, when a capacitance value C of a predetermined value is generated at each intersection of the driving electrode TX and the receiving electrode RX and an object such as a finger is close to the touch sensor panel 100, The value of the capacity can be changed. In Fig. 1, the electrostatic capacity can represent mutual electrostatic capacity (Cm). The sensing unit 110 senses such electrical characteristics and can detect whether the touch sensor panel 100 is touched and / or touched. For example, it is possible to detect whether or not a touch is made on the surface of the touch sensor panel 100 having a two-dimensional plane including a first axis and a second axis, and / or its position.

More specifically, the position of the touch in the second axial direction can be detected by detecting the driving electrode TX to which the driving signal is applied when the touch to the touch sensor panel 100 occurs. Likewise, the position of the touch in the first axis direction can be detected by detecting the capacitance change from the received signal received through the receiving electrode RX when the touch sensor panel 100 is touched.

Although the mutual capacitance type touch sensor panel has been described in detail as the touch sensor panel 100 in the above description, the touch sensor panel for detecting whether or not the touch input device 1000 according to the embodiment of the present invention is touch- 100 may be fabricated by other methods than the above-described methods such as a self-capacitance method, a surface capacitance method, a projected capacitance method, a resistive film method, a surface acoustic wave (SAW) method, an infrared An optical sensing method, a dispersive signal technology, and an acoustic pulse recognition method.

The touch sensor panel 100 for detecting a touch position in the touch input apparatus 1000 according to the embodiment of the present invention may be located outside or inside the display panel 200. [

The display panel 200 of the touch input device 1000 according to the exemplary embodiment of the present invention may include a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED) Or the like. Accordingly, the user can perform an input action by touching the touch surface while visually checking the screen displayed on the display panel. At this time, the display panel 200 receives input from a central processing unit (CPU) or an application processor (CPU), which is a central processing unit on a main board for operating the touch input apparatus 1000, And may include control circuitry to display the content. At this time, the control circuit for operating the display panel 200 may include a display panel control IC, a graphic controller IC, and other circuits necessary for operating the display panel 200.

FIGS. 2A, 2B, and 2C are conceptual diagrams illustrating relative positions of a touch sensor panel with respect to a display panel in a touch input device according to an embodiment of the present invention. 2A to 2C, an LCD panel is shown as a display panel, but this is merely an example, and any display panel can be applied to the touch input device 1000 according to the embodiment of the present invention.

In this specification, reference numeral 200 denotes a display panel. In FIG. 2 and FIG. 2, reference numeral 200 denotes a display panel as well as a display panel. As shown in FIG. 2A, the LCD panel includes a liquid crystal layer 250 including a liquid crystal cell, a first glass layer 261 including electrodes at both ends of the liquid crystal layer 250, Layer 262 and a second polarizing layer 272 on one surface of the first polarizing layer 271 and the second glass layer 262 on one surface of the first glass layer 261 as a direction opposite to the liquid crystal layer 250 ). It will be apparent to those skilled in the art that the LCD panel may further include other configurations for performing the display function and may be modified.

FIG. 2A shows that the touch sensor panel 100 is disposed outside the display panel 200 in the touch input device 1000. FIG. The touch surface for the touch input device 1000 may be the surface of the touch sensor panel 100. [ In FIG. 2A, the surface of the touch sensor panel 100, which may be a touch surface, may be the upper surface of the touch sensor panel 100. In addition, the touch surface of the touch input device 1000 may be the outer surface of the display panel 200 according to the embodiment. The outer surface of the display panel 200, which may be the touch surface in FIG. 2A, may be the lower surface of the second polarizing layer 272 of the display panel 200. At this time, in order to protect the display panel 200, the lower surface of the display panel 200 may be covered with a cover layer (not shown) such as glass.

Figs. 2B and 2C show that the touch sensor panel 100 is disposed inside the display panel 200 in the touch input device 1000. Fig. 2B, a touch sensor panel 100 for detecting a touch position is disposed between the first glass layer 261 and the first polarizing layer 271. In this case, At this time, the touch surface to the touch input device 1000 may be the upper surface or the lower surface in FIG. 2B as the outer surface of the display panel 200. 2C illustrates a case where the touch sensor panel 100 for detecting a touch position is included in the liquid crystal layer 250. FIG. At this time, the touch surface with respect to the touch input device 1000 may be the upper surface or the lower surface in FIG. 2C as the outer surface of the display panel 200. 2B and 2C, the upper or lower surface of the display panel 200, which may be a touch surface, may be covered with a cover layer (not shown) such as glass.

Although the touch sensor panel 100 according to the exemplary embodiment of the present invention has been described in terms of touch detection and / or touch position detection, the touch sensor panel 100 according to the exemplary embodiment of the present invention can detect touch It is possible to detect the magnitude of the pressure of the touch with the presence and / or position of the touch. It is also possible to detect the pressure magnitude of the touch by further including a pressure detecting module for detecting the touch pressure separately from the touch sensor panel 100. [

3 is a cross-sectional view of a touch input device configured to detect a touch position and a touch pressure according to an embodiment of the present invention.

The touch sensor panel 100 and the pressure detection module 400 for detecting the touch position in the touch input device 1000 including the display panel 200 may be attached to the front surface of the display panel 200. [ Accordingly, it is possible to protect the display screen of the display panel 200 and increase the touch detection sensitivity of the touch sensor panel 100.

In this case, the pressure detecting module 400 may operate separately from the touch sensor panel 100 for detecting the touch position. For example, the pressure detecting module 400 may include a touch sensor panel 100 ) ≪ / RTI > Further, the pressure detection module 400 may be configured to detect the touch pressure by being combined with the touch sensor panel 100 for detecting the touch position. For example, at least one of the driving electrode TX and the receiving electrode RX included in the touch sensor panel 100 for detecting the touch position may be used to detect the touch pressure.

In FIG. 3, the pressure detecting module 400 is coupled with the touch sensor panel 100 to detect a touch pressure. 2, the pressure detecting module 400 includes a spacer layer 420 that separates the touch sensor panel 100 from the display panel 200. [ The pressure sensing module 400 may include a reference potential layer spaced apart from the touch sensor panel 100 through the spacer layer 420. At this time, the display panel 200 can function as a reference potential layer.

The reference potential layer may have any potential that can cause a change in the capacitance 101 generated between the driving electrode TX and the receiving electrode RX. For example, the reference potential layer may be a ground layer having a ground potential. The reference potential layer may be a ground layer of the display panel 200. At this time, the reference potential layer may have a plane parallel to the two-dimensional plane of the touch sensor panel 100.

As shown in FIG. 3, the touch sensor panel 100 and the display panel 200, which is a reference potential layer, are spaced apart from each other. At this time, the spacer layer 420 between the touch sensor panel 100 and the display panel 200 is implemented as an air gap according to a difference in the bonding method between the touch sensor panel 100 and the display panel 200 . The spacer layer 420 may be made of a shock-absorbing material according to an embodiment. Here, the shock-absorbing material may comprise a sponge and a graphite layer. The spacer layer 420 may be filled with a dielectric material according to embodiments. Such a spacer layer 420 may be formed by a combination of an air gap, an impact-absorbing material, and a dielectric material.

At this time, a double adhesive tape (DAT: Double Adhesive Tape) may be used to fix the touch sensor panel 100 and the display panel 200. For example, the touch sensor panel 100 and the display panel 200 are overlapped with each other, and the double-sided adhesive tape 430 is bonded to the edge regions of the touch sensor panel 100 and the touch sensor panel 200 Two layers may be bonded, but the touch sensor panel 100 and the display panel 200 may be spaced apart from each other by a predetermined distance d.

Generally, the capacitance 101 (Cm) between the driving electrode TX and the receiving electrode RX changes even when the touch surface is touched without bending the touch sensor panel 100. [ That is, when touching the touch sensor panel 100, mutual capacitance Cm (101) can be reduced compared to the basic mutual capacitance. This is because, when an object such as a finger is close to the touch sensor panel 100, the object functions as a ground (GND), and the fringing capacitance of the mutual capacitance Cm is absorbed into the object to be. The basic mutual capacitance is a value of the mutual capacitance between the driving electrode TX and the receiving electrode RX when there is no touch to the touch sensor panel 100. [

The touch sensor panel 100 may be bent when a pressure is applied when an upper surface, which is a touch surface of the touch sensor panel 100, is touched by an object. At this time, the value of the mutual capacitance 101 (Cm) between the driving electrode TX and the receiving electrode RX can be further reduced. This is because the distance between the touch sensor panel 100 and the reference potential layer is reduced from d to d 'as the touch sensor panel 100 is bent so that the fringing capacitance of the mutual capacitance 101 (Cm) It is also absorbed into the dislocation layer. In the case where the touch object is an insulator, the change of the mutual capacitance Cm may be caused solely by the distance change (d-d ') between the touch sensor panel 100 and the reference potential layer.

As described above, by configuring the touch input device 1000 including the touch sensor panel 100 and the pressure detection module 400 on the display panel 200, it is possible to simultaneously detect not only the touch position but also the touch pressure have.

However, as shown in FIG. 3, when the touch sensor panel 100 as well as the pressure detection module 400 are disposed on the display panel 200, the display characteristics of the display panel deteriorate. Particularly, when the air gap is included in the upper part of the display panel 200, the visibility and light transmittance of the display panel may be lowered.

Therefore, in order to prevent such a problem from occurring, an air gap is not disposed between the touch sensor panel 100 for detecting the touch position and the display panel 200, and a touch sensor The panel 100 and the display panel 200 may be fully laminated.

4A is a cross-sectional view of a touch input device according to an embodiment of the present invention. The touch sensor panel 100 for detecting the touch position in the touch input apparatus 1000 according to the embodiment of the present invention and the display panel 200 can be completely laminated with an adhesive. Accordingly, display color clarity, visibility and light transmittance of the display panel 200, which can be confirmed through the touch surface of the touch sensor panel 100, can be improved.

 4A and 4E and the description thereof, it is exemplified that the touch sensor panel 100 as the touch input device 1000 according to the second embodiment of the present invention is laminated and adhered on the display panel 200 with an adhesive The touch input apparatus 1000 according to the second embodiment of the present invention may include a case where the touch sensor panel 100 is disposed inside the display panel 200 as shown in FIGS. 2B and 2C. 4A and 4E, the touch sensor panel 100 covers the display panel 200. However, the touch sensor panel 100 is located inside the display panel 200, A touch input device 1000 covered with a cover layer such as a touch pad can be used as the second embodiment of the present invention.

The touch input device 1000 according to the embodiment of the present invention may be applied to various devices such as a cell phone, a PDA (Personal Data Assistant), a smartphone, a tablet PC, an MP3 player, a notebook, And electronic devices including the same touch screen.

The substrate 300 in the touch input apparatus 1000 according to the embodiment of the present invention may include a cover 320 as an outermost mechanism of the touch input apparatus 1000, And / or a mounting space 310 where the battery can be placed, and the like. A central processing unit (CPU), an application processor (CPU), or the like may be mounted on the circuit board for operating the touch input device 1000 as a main board. The circuit board and / or the battery for the operation of the display panel 200 and the touch input device 1000 may be separated through the substrate 300 and the electrical noise generated in the display panel 200 may be cut off.

The touch sensor panel 100 or the front cover layer may be formed wider than the display panel 200, the substrate 300 and the mounting space 310 in the touch input device 1000, The cover 320 may be formed so as to surround the display panel 200, the substrate 300, and the mounting space 310 where the circuit board is located together with the sensor panel 100.

The touch input apparatus 1000 according to the embodiment of the present invention detects a touch position through the touch sensor panel 100 and arranges the pressure detection module 400 between the display panel 200 and the substrate 300 Pressure can be detected. At this time, the touch sensor panel 100 may be located inside or outside the display panel 200. The pressure sensing module 400 may comprise, for example, electrodes 450 and 460.

The electrodes 450 and 460 may be formed on the substrate 300 as shown in FIG. 4B, may be formed on the display panel 200 as shown in FIG. 4C, And may be formed on the display panel 200 and the substrate 300 as shown in FIG.

4E, the electrodes 450 and 460 included in the pressure detecting module 400 may be included in the touch input device 1000 in the form of an electrode sheet 440 including the corresponding electrode, This will be discussed in detail below. Since the electrodes 450 and 460 must be configured to include air gaps between the substrate 300 and the display panel 200, the electrode sheets 440 including the electrodes 450 and 460 in FIG. Are disposed apart from the substrate 300 and the display panel 200.

4F is a perspective view of the touch input device according to the embodiment of the present invention. 4B, in the touch input apparatus 1000 according to the embodiment of the present invention, the pressure detecting module 400 is disposed between the display panel 200 and the substrate 300 and includes electrodes 450 and 460 . Hereinafter, the electrodes 450 and 460 for detecting the pressure are referred to as pressure electrodes so as to be clearly distinguished from the electrodes included in the touch sensor panel 100. At this time, since the pressure electrode is disposed at the lower part of the display panel rather than the upper part thereof, it may be formed of an opaque material as well as a transparent material.

5A is a cross-sectional view of an exemplary electrode sheet including a pressure electrode for attaching to a touch input device according to an embodiment of the present invention. For example, the electrode sheet 440 may include an electrode layer 441 between the first insulating layer 500 and the second insulating layer 501. The electrode layer 441 may include a first electrode 450 and / or a second electrode 460. The first insulating layer 500 and the second insulating layer 501 may be an insulating material such as polyimide, polyethylene terephthalate (PET), or the like. The first electrode 450 and the second electrode 460 included in the electrode layer 441 may include a material such as copper, aluminum (Al), silver (Ag), or the like. According to the manufacturing process of the electrode sheet 440, the electrode layer 441 and the second insulating layer 501 may be bonded with an adhesive (not shown) such as OCA (Optically Clear Adhesive). According to the embodiment, the pressure electrodes 450 and 460 may be formed by placing a mask having a through-hole corresponding to the pressure electrode pattern on the first insulating layer 500, spraying a conductive spray, A conductive material may be printed, or may be formed by etching while a metal material is applied. 5A and the following description, the electrode sheet 440 is illustrated as having a structure including the pressure electrodes 450 and 460 between the insulating layers 500 and 501, but this is merely an example, It may simply include pressure electrodes 450 and 460 only.

The electrode sheet 440 may be spaced apart from the substrate 300 or between the display panel 200 and the spacer layer 420 so that the touch pressure can be detected in the touch input apparatus 1000 according to the embodiment of the present invention. And may be attached to the substrate 300 or the display panel 200.

5B is a cross-sectional view of a portion of the touch input device in which the electrode sheet is attached to the touch input device according to the first method. In FIG. 5B, it is shown that the electrode sheet 440 is attached on the substrate 300 or the display panel 200.

An adhesive tape 430 having a predetermined thickness may be formed along the rim of the electrode sheet 440 in order to hold the spacer layer 420, as shown in Fig. 5C. 5C, the adhesive tape 430 is shown to be formed on all edges of the electrode sheet 440 (e.g., four sides of a tetragon), but the adhesive tape 430 may be formed on at least a part of the edges of the electrode sheet 440 , Three sides of a quadrangle). At this time, as shown in FIG. 5C, the adhesive tape 430 may not be formed in the area including the pressure electrodes 450 and 460. When the electrode sheet 440 is attached to the substrate 300 or the display panel 200 through the adhesive tape 430, the pressure electrodes 450 and 460 are fixed to the substrate 300 or the display panel 200, May be spaced apart. According to the embodiment, the adhesive tape 430 may be formed on the upper surface of the substrate 300 or the lower surface of the display panel 200. Further, the adhesive tape 430 may be a double-sided adhesive tape. In Fig. 5C, only one of the pressure electrodes 450 and 460 is illustrated.

5D is a cross-sectional view of a portion of a touch input device in which an electrode sheet is attached to a touch input device according to a second method. 5D, the electrode sheet 440 can be fixed to the substrate 300 or the display panel 200 with the adhesive tape 431 after positioning the electrode sheet 440 on the substrate 300 or the display panel 200 have. To this end, the adhesive tape 431 may contact at least a portion of the electrode sheet 440 and at least a portion of the substrate 300 or the display panel 200. 5D, the adhesive tape 431 is shown extending from the top of the electrode sheet 440 to the exposed surface of the substrate 300 or the display panel 200. At this time, the adhesive tape 431 may have an adhesive force only on the side of the surface contacting with the electrode sheet 440. 5D, the upper surface of the adhesive tape 431 may not be adhesive.

5D, even if the electrode sheet 440 is fixed to the substrate 300 or the display panel 200 through the adhesive tape 431, the electrode sheet 440 and the substrate 300 or the display panel 200 A predetermined space, that is, an air gap may exist. This is because the electrode sheet 440 is not directly adhered with the adhesive between the substrate 300 or the display panel 200 and the electrode sheet 440 includes the pressure electrodes 450 and 460 having the pattern, ) May not be flat. The air gap in Fig. 5D may also function as a spacer layer 420 for detecting the touch pressure.

Hereinafter, embodiments of the present invention will be described by taking an example in which an electrode sheet 440 is attached to a substrate 300 or a display panel 200 according to a first method as shown in FIG. 5B, 2 method or the like, the electrode sheet 440 is attached to the substrate 300 or the display panel 200 in a spaced apart manner.

Hereinafter, an embodiment of the present invention will be described with respect to a pressure detection module 400 of the type shown in FIG. 4B.

When pressure is applied to the touch sensor panel 100 through the object, the distance between the display panel 200 and the substrate 300 may vary, and thus the capacitance detected at the pressure electrode may vary.

Specifically, the pressure electrodes 450 and 460 may be composed of a single electrode or may be configured to include a first electrode and a second electrode. When the pressure electrode is composed of a single electrode, as the distance between the reference potential layer included in the display panel 200 or the display panel 200 itself and the single electrode becomes closer, the self-capacitance of the single electrode The amount of change is changed, and accordingly, the magnitude of the touch pressure can be detected. When the pressure electrodes 450 and 460 are configured to include the first electrode and the second electrode, any one of the first electrode and the second electrode may be a driving electrode and the other may be a receiving electrode. A driving signal may be applied to the driving electrode and a sensing signal may be obtained through the receiving electrode. When a pressure is applied to the touch sensor panel 100 through the object, the distance between the first electrode and the second electrode, which is disposed inside or outside the display panel 200 or included in the display panel 200 itself, As the distance between the first electrode and the second electrode decreases, the amount of change in mutual capacitance between the first electrode and the second electrode changes, and thus the magnitude of the touch pressure can be detected.

The display panel 200 may include a first area and a second area. Specifically, the first region may be a central region of the display panel 200, and the second region may be an edge region of the display panel 200. In this case, the central area of the display panel 200, that is, the first area may be a predetermined size area based on the center point of the surface of the touch sensor panel 100. In addition, the edge area of the display panel 200, that is, the second area may be a remaining area excluding the center area of the surface of the touch sensor panel 100.

When the pressure is applied to the touch sensor panel through the object, the degree of bending of the touch sensor panel 100 and the display panel 200 varies depending on the position where the pressure is applied. Therefore, even if the same pressure is applied, The magnitude of the touch pressure can be detected differently depending on the position where the pressure is applied.

6A and 6B, when pressure is applied to the display panel 200 in the touch input device 1000 according to the first embodiment of the present invention, The first area a may be bent more than the second areas b and c so that the display panel 200 and the first area a when pressure is applied to the first area a of the display panel 200, (b) and (c) of the display panel 200 are applied to the display panel 200 and the second area (b) of the display panel 200, The distance d2 between the pressure electrodes 450 and 470 disposed under the regions b and c may be larger.

That is, when the pressure electrodes are formed on the substrate 300 as shown in FIGS. 6A and 6B, have the same width, are formed at equal intervals, have the same distance as the reference potential layer, The amount of capacitance change detected in the second regions b and c is larger than the amount of capacitance change detected in the first region a of the display panel 200 even if the same amount of pressure is applied.

Accordingly, the present invention can be applied to a display panel (e.g., a touch panel, a touch panel, a touch panel, a touch panel, or the like) It is necessary to dispose the pressure electrode so that the capacitance change amount detected in the second region (b, c) is larger than the first region (a) of the second region (b).

In other words, when the pressure is applied to the touch sensor panel 100, the distance between the display panel 200 and the substrate 300 changes, and under the same condition, the display panel 200 is placed under the first area of the display panel 200 It is necessary to arrange the pressure electrode so that the capacitance change amount detected by the pressure electrode disposed at the lower portion of the second region of the display panel 200 is larger than the capacitance change amount detected at the pressure electrode.

4B, the reference potential layer may be disposed inside or outside the display panel 200 or may be included in the display panel 200 itself, and the reference potential layer may be included in the reference potential layer, And the pressure electrode disposed at the lower portion of the first region and the pressure electrode disposed at the lower portion of the second region are formed to have the same size as the change in the distance between the reference potential layer and the pressure electrode disposed below the second region It is necessary to arrange the pressure electrode so that the amount of change in capacitance detected by the pressure electrode disposed under the second region is larger in accordance with the change in the distance.

Similarly, for the pressure detecting module 400 of the type shown in FIG. 4C, the reference potential layer may be disposed inside or outside the substrate 300 or may be included in the substrate 300 itself, And the pressure electrode disposed at the lower portion of the first region and the pressure electrode disposed at the lower portion of the second region are formed to have the same size as the change in the distance between the reference potential layer and the pressure electrode disposed below the second region It is necessary to arrange the pressure electrode so that the amount of change in capacitance detected by the pressure electrode disposed under the second region is larger in accordance with the change in the distance.

4D, the distance between the pressure electrode formed on the display panel 200 and the pressure electrode formed on the substrate 300, which is disposed below the first region, The pressure electrode formed on the display panel 200 and the pressure formed on the substrate 300, which are disposed on the reference potential layer and the second region lower than the capacitance change amount detected on the pressure electrode disposed on the lower portion of the first region, It is necessary to dispose the pressure electrode so that the amount of capacitance change detected by the pressure electrode disposed at the lower portion of the second region is larger in accordance with the distance change of the same size as the change of the distance between the electrodes.

Specifically, in order to increase the amount of change in capacitance detected in the second region (b, c) from the first region (a) of the display panel 200, according to the first method in the second embodiment of the present invention The width of the pressure electrode 460 disposed under the first region a may be smaller than the width of the pressure electrodes 450 and 470 disposed under the second region b and c as shown in FIGS.

The distance between the pressure electrode 470 disposed at the lower portion of the first region a and the adjacent pressure electrode of the pressure electrode 470 disposed under the second region b, 450, 460, 480, and 490, respectively.

The distance between the pressure electrode 460 disposed at the lower portion of the first region a and the reference potential layer disposed at the lower portion of the second region b, 450, and 470, respectively.

According to the fourth method, the composition of the material forming the pressure electrode 460 disposed under the first region (a) as shown in Fig. 7 (d) is the same as that of the pressure electrode 450 , 470). ≪ / RTI >

In the above description, when the pressure electrode is composed of a single electrode, the amount of change in capacitance detected in the second region (b, c) is greater than the first region (a) of the display panel 200 according to the first to fourth methods The following embodiment has been described. (B, c) than the first area (a) of the display panel (200) when the pressure electrode is configured to include the first electrode and the second electrode An example will be described with reference to Figs. 7E to 7F.

When the pressure electrode is formed of the first electrode 450, 460, 470 and the second electrode 451, 461, 471 as shown in FIG. 7E according to the first method, The widths of the first electrode 460 and the second electrode 461 may be smaller than the widths of the first and second electrodes 450 and 470 and the second electrodes 451 and 461 disposed under the second regions b and c .

If the pressure electrode is composed of the first electrodes 450, 460, 470 and 480 and the second electrodes 451, 461, 471 and 481 as shown in FIG. 7F according to the second method, The distance between the first electrode 470 disposed on the first region 470 and the electrode adjacent to the second electrode 471 is shorter than the distance between the first electrode 450, 460, 480, 490 disposed under the second region b, May be larger than the distance between the electrodes 451, 461, 481, 491 and the adjacent electrodes.

In the case where the pressure electrode includes the first electrode and the second electrode as described above, the amount of change in the electrostatic capacitance detected in the second region (b, c) rather than the first region (a) according to the third method and the fourth method . This is similar to that described with reference to FIGS. 7C and 7D, so that a detailed description thereof will be omitted.

8A and 8B are cross-sectional views of the touch input device shown in FIG. 7A when pressure is applied according to the first method in the embodiment of the present invention.

The width of the pressure electrode 460 disposed under the first region a in Figures 8A and 8B is formed to be smaller than the width of the pressure electrodes 450 and 470 disposed under the second regions b and c For example. 8A, when the object f is applied with the pressure f in the first region a, the capacitance variation is obtained as the distance between the reference potential layer and the pressure electrode decreases, Can be detected. As shown in FIG. 8B, when a pressure f is applied to the second region b, the electrostatic capacitance variation is obtained as the distance between the reference potential layer and the pressure electrode decreases, The magnitude of the applied touch pressure can be detected. In this case, since the width of the pressure electrode disposed at the lower portion of the second region (b) is larger than the width of the pressure electrode disposed at the lower portion of the first region (a), the capacitance The amount of change can be largely detected. Therefore, even if the distance between the pressure electrode disposed at the lower portion of the first region (a) and the reference potential layer is smaller than the distance between the pressure electrode disposed at the lower portion of the second region (b) and the reference potential layer, The capacitance change amount in the second region (b) and the capacitance change amount in the first region (a) may be the same. Therefore, the magnitude of the touch pressure detected in the first region (a) and the magnitude of the touch pressure detected in the second region (b) may be the same. At this time, if the difference between the magnitude of the pressure detected in the first region (a) and the magnitude of the pressure detected in the second region (b) is within a certain range, it can be determined that the pressure is the same magnitude.

Figs. 8C and 8D are cross-sectional views of the touch input device shown in Fig. 7B when pressure is applied according to the second method in the embodiment of the present invention. Fig.

The pressure electrodes 450, 460, 480, and 470 disposed at the lower portions of the second regions b and c are spaced apart from the adjacent pressure electrodes of the pressure electrode 470 disposed under the first region a in Figs. 8C and 8D. 490 are larger than the distance between the adjacent pressure electrodes. 8C, when a pressure f is applied to the first region a, the electrostatic capacitance variation is obtained as the distance between the reference potential layer and the pressure electrode decreases, Can be detected. As shown in FIG. 8D, when a pressure f is applied to the second region b, the capacitance variation is obtained as the distance between the reference potential layer and the pressure electrode decreases, The magnitude of the applied touch pressure can be detected. In this case, since the distance from the adjacent pressure electrode of the pressure electrode disposed at the lower portion of the second region (b) is smaller than the distance between the adjacent pressure electrode of the pressure electrode disposed at the lower portion of the first region (a) The capacitance change amount can be largely detected in the second region (b). Therefore, even if the distance between the pressure electrode disposed at the lower portion of the first region (a) and the reference potential layer is smaller than the distance between the pressure electrode disposed at the lower portion of the second region (b) and the reference potential layer, The capacitance change amount in the second region (b) and the capacitance change amount in the first region (a) may be the same. Therefore, the magnitude of the touch pressure detected in the first region (a) and the magnitude of the touch pressure detected in the second region (b) may be the same.

Figs. 8E and 8F are cross-sectional views of the touch input device shown in Fig. 7C when pressure is applied according to the third method in the embodiment of the present invention. Fig.

The distance from the reference potential layer of the pressure electrode 460 disposed at the lower portion of the first region a in Figures 8E and 8F to the reference of the pressure electrodes 450 and 470 disposed under the second regions b and c And is formed to be larger than the distance from the dislocation layer. 8E, when the object f is applied with the pressure f in the first region a, the capacitance variation is obtained as the distance between the reference potential layer and the pressure electrode decreases, and the first region a Can be detected. As shown in FIG. 8F, when the pressure f is applied to the second region b, the amount of change in capacitance between the pressure electrodes is obtained as the distance between the reference potential layer and the pressure electrode decreases, the magnitude of the touch pressure applied to the touch panel (b) can be detected. In this case, the distance from the reference potential layer of the pressure electrode disposed under the second region (b) when no pressure is applied is smaller than the distance from the reference potential layer of the pressure electrode disposed below the first region (a) Therefore, the capacitance change amount in the second region (b) can be detected to be larger than the first region (a). Therefore, the reference of the pressure electrode disposed at the lower portion of the first region (a) where the distance from the reference potential layer of the pressure electrode disposed at the lower portion of the second region (b) The capacitance change amount in the second region (b) and the capacitance change amount in the first region (a) may be equal to each other, even if the distance is smaller than the distance from the potential region. Therefore, the magnitude of the touch pressure detected in the first region (a) and the magnitude of the touch pressure detected in the second region (b) may be the same.

FIGS. 8G and 8H are cross-sectional views of the touch input device shown in FIG. 7D when pressure is applied according to the fourth method in the embodiment of the present invention. FIG.

The composition of the material forming the pressure electrode 460 disposed under the first region a in Figures 8G and 8H forms the pressure electrodes 450 and 470 disposed below the second regions b and c And formed so as to be different from the composition of the material. For example, in the same condition, the amount of change in capacitance in the second region (b, c) is larger than the amount of change in capacitance in the first region (a) May be formed differently from the composition of the material forming the pressure electrode disposed below the first region (a). In this case, since the capacitance change amount in the second region (b, c) is larger than the capacitance change amount in the first region (a), the capacitance change amount in the second region (b, c) Can be largely detected. Therefore, even if the distance between the pressure electrode disposed at the lower portion of the first region (a) and the reference potential layer is smaller than the distance between the pressure electrode disposed at the lower portion of the second region (b) and the reference potential layer, The capacitance change amount in the second region (b) and the capacitance change amount in the first region (a) may be the same. Therefore, the magnitude of the touch pressure detected in the first region (a) and the magnitude of the touch pressure detected in the second region (b) may be the same.

Figs. 8I and 8J are cross-sectional views when pressure is applied to the touch input device shown in Fig. 7E according to the first method in the embodiment of the present invention. Fig.

The widths of the first electrode 460 and the second electrode 461 disposed under the first region a in FIGS. 8I and 8J are equal to the widths of the first and second regions 450 and 450, 470 and the second electrodes 451, 471, respectively. 8A, when a pressure f is applied to the first region 'a', the capacitance variation is obtained as the distance between the reference potential layer and the first and second electrodes decreases, It is possible to detect the magnitude of the touch pressure applied to the first region (a). As shown in FIG. 8J, when a pressure f is applied to the second region b, the electrostatic capacitance variation is obtained as the distance between the reference potential layer and the first and second electrodes decreases, the magnitude of the touch pressure applied to the touch panel (b) can be detected. In this case, since the widths of the first and second electrodes disposed at the lower portion of the second region b are larger than the widths of the first and second electrodes disposed at the lower portion of the first region a, The capacitance change amount can be largely detected in the second region (b). Therefore, even if the distance between the first and second electrodes disposed under the first region (a) and the reference potential layer is smaller than the distance between the first and second electrodes disposed below the second region (b) and the reference potential layer , The capacitance change amount in the second region (b) and the capacitance change amount in the first region (a) may be the same for the same-sized pressure. Therefore, the magnitude of the touch pressure detected in the first region (a) and the magnitude of the touch pressure detected in the second region (b) may be the same.

8K and 8L are sectional views when pressure is applied to the touch input device shown in Fig. 7F according to the second method in the embodiment of the present invention.

The distance between the first electrode 470 disposed at the lower portion of the first region a and the adjacent electrode of the second electrode 471 in Figures 8K and 8L corresponds to the distance Is formed to be larger than the distance between the electrodes 450, 460, 480, and 490 and the adjacent electrodes of the second electrodes 451, 461, 481, and 491. [ 8K, when a pressure f is applied to the first region 'a', the electrostatic capacitance change amount is obtained as the distance between the reference potential layer and the first and second electrodes decreases, It is possible to detect the magnitude of the touch pressure applied to the first region (a). As shown in FIG. 8L, when a pressure f is applied to an object in the second region b, the electrostatic capacitance variation is obtained as the distance between the reference potential layer and the first and second electrodes decreases, the magnitude of the touch pressure applied to the touch panel (b) can be detected. In this case, since the distance between the first and second electrodes disposed at the lower portion of the second region (b) is shorter than the distance between adjacent electrodes of the first and second electrodes disposed at the lower portion of the first region (a) The capacitance change amount in the second region (b) can be detected to be larger than the first region (a). Therefore, even if the distance between the first and second electrodes disposed under the first region (a) and the reference potential layer is smaller than the distance between the first and second electrodes disposed below the second region (b) and the reference potential layer , The capacitance change amount in the second region (b) and the capacitance change amount in the first region (a) may be the same for the same-sized pressure. Therefore, the magnitude of the touch pressure detected in the first region (a) and the magnitude of the touch pressure detected in the second region (b) may be the same.

In the case where the pressure electrode includes the first electrode and the second electrode as described above, when the pressure is applied to the touch input device according to the third method and the fourth method, as shown in Figs. 8E, 8F, 8G, 8H And therefore, a detailed description thereof will be omitted.

6 to 8, the display panel 200 and the substrate 300 are spaced apart from each other by the thickness of the adhesive tape 430 in the pressure detecting module 400, A portion of the substrate 300 that is in contact with the tape 430 protrudes toward the substrate 300 or a portion of the substrate 300 that contacts the adhesive tape 430 protrudes toward the display panel 200, Can be separated from the adhesive tape 430 by a thickness or more.

9 to 14 illustrate pressure electrodes that can be applied to the first and second embodiments of the present invention, respectively.

Fig. 9 illustrates a pressure electrode that can be applied to the first embodiment of the present invention.

According to an embodiment of the present invention, the pressure electrode may have a lattice shape as shown in Fig. 9 (a) or a swirl shape as shown in Fig. 9 (b). Further, the pressure electrode may have a comb shape as shown in FIG. 9 (c) or may have a trident shape as shown in FIG. 9 (d).

10 illustrates a pressure electrode that can be applied to the first method in the second embodiment of the present invention.

According to an embodiment of the present invention, the pressure electrode may be formed in a lattice shape as shown in FIG. 10 (a) or in a spiral shape as shown in FIG. 10 (b). Also, the pressure electrode may be formed in a comb shape as shown in FIG. 10 (c) or in a trident shape as shown in FIG. 10 (d). In this case, the width of the pressure electrode 600 disposed under the first region in FIGS. 10A, 10B, 10C, and 10D is set to be the width of the pressure electrode 610 disposed under the second region . ≪ / RTI > Accordingly, when the same pressure is applied, the magnitude of the touch pressure detected in the second region may be the same as the magnitude of the touch pressure detected in the first region.

11 illustrates a pressure electrode that can be applied to the second method in the second embodiment of the present invention.

According to the embodiment of the present invention, the pressure electrode may be formed in a lattice shape as shown in FIG. 11 (a) or in a spiral shape as shown in FIG. 11 (b). Also, the pressure electrode may be formed in a comb shape as shown in FIG. 11 (c) or in a trident shape as shown in FIG. 11 (d). In this case, the distance from the adjacent pressure electrode of the pressure electrode 700 disposed under the first region of (a), (b), (c) and (d) May be formed to be larger than the distance between the adjacent pressure electrodes of the first electrode 710. Accordingly, when the same pressure is applied, the magnitude of the touch pressure detected in the second region may be the same as the magnitude of the touch pressure detected in the first region.

Fig. 12 illustrates a pressure electrode that can be applied to the third method in the second embodiment of the present invention.

According to an embodiment of the present invention, the pressure electrode may be formed in a lattice shape as shown in FIG. 12 (a) or in a spiral shape as shown in FIG. 12 (b). Also, the pressure electrode may be formed in a comb shape as shown in FIG. 12 (c), or may be formed in a trident shape as shown in FIG. 12 (d). In this case, the distance from the reference potential layer of the pressure electrode 800 disposed under the first region of FIGS. 12A, 12B, 12C, May be formed to be larger than the distance from the reference potential layer of the second electrode layer 810. Accordingly, when the pressure of the same size is applied, the magnitude of the touch pressure detected in the second region may be the same as the magnitude of the touch pressure detected in the first region.

13 illustrates a pressure electrode that can be applied to the fourth method in the second embodiment of the present invention.

According to the embodiment of the present invention, the pressure electrode may be formed in a lattice shape as shown in FIG. 13 (a) or in a spiral shape as shown in FIG. 13 (b). Also, the pressure electrode may be formed in a comb shape as shown in FIG. 13C or a triangular shape as shown in FIG. 13D. In this case, the composition of the material forming the pressure electrode 900 disposed under the first region of FIGS. 13A, 13B, 13C and 13D is the same as that of the pressure electrode 910). ≪ / RTI > Accordingly, when the pressure of the same size is applied, the magnitude of the touch pressure detected in the second region may be the same as the magnitude of the touch pressure detected in the first region.

14, the pressure electrode may have a structure in which electrodes are formed only in regions other than the center, as shown in FIGS. 14A, 14B, 14C, 14D and 14E .

Although the pressure electrode has been described above, the pressure electrode according to the embodiment of the present invention can be implemented by various methods other than the above-described method.

FIGS. 15A, 15B, 15C and 15D illustrate the pressure electrode applied to the embodiment of the present invention and graphs showing the amount of change in capacitance according to the touch position of the touch input device 1000 having such a pressure electrode do.

FIG. 15B illustrates a graph illustrating a capacitance change amount according to a touch position with respect to a same-sized pressure in the touch input apparatus 1000 having the pressure electrode according to the first embodiment as shown in FIG. 15A. According to FIGS. 10A and 10B, when the touch pressure is applied to the center of the touch input device 1000, the amount of change in capacitance is greatest. Also, it can be seen that the capacitance change amount becomes smaller as the object moves to the edge of the touch input apparatus 1000.

FIG. 15D illustrates a graph illustrating a capacitance change amount according to a touch position with respect to a pressure of the same magnitude in the touch input apparatus 1000 having the pressure electrode according to the embodiment, as shown in FIG. 15C. 10C and 10D, it can be seen that the capacitance change amount is constant regardless of the touch position.

Although the first area is described as the center area of the display panel and the second area is described as the edge area of the display panel in the above description, the present invention is not limited to this, and when the sensitivity of the pressure detection is different according to the position of the display panel, The region can be set as the first region, and the region having the low pressure detection sensitivity can be set as the second region.

The features, structures, effects and the like described in the embodiments are included in one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons 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 taken by way of illustration, It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

1000: Touch input device
100: touch sensor panel
120:
110:
130:
200: Display panel
300: substrate
400: Pressure detection module
420; Spacer layer
450, 460: pressure electrode

Claims (17)

A touch input device capable of detecting pressure of a touch on a touch surface,
A display panel; And
And a pressure electrode disposed at a lower portion of the display panel,
When the pressure is applied to the touch surface, the display panel is bent,
As the display panel is warped, the electrical characteristics sensed by the pressure electrode change,
Detecting a magnitude of a pressure applied to the touch surface according to a change amount of the electrical characteristic,
Wherein the display panel includes a first region and a second region,
The pressure detection sensitivity of the first region is higher than the pressure detection sensitivity of the second region,
Wherein a change amount of an electrical characteristic sensed when a pressure is applied to the second region is larger than a change amount of the electrical characteristic sensed when a pressure is applied to the first region under a condition that the display panel is warped,
Touch input device. The method according to claim 1,
Wherein when the pressure is applied, the first region is bent more than the second region,
Touch input device. 3. The method according to claim 1 or 2,
Wherein the pressure electrode comprises at least one single pressure electrode,
Wherein an electrical characteristic sensed by the single pressure electrode changes as pressure is applied to the touch surface,
Touch input device. 3. The method according to claim 1 or 2,
Wherein the pressure electrode is formed on the display panel,
Touch input device. 3. The method according to claim 1 or 2,
The width of the pressure electrode disposed below the first region is smaller than the width of the pressure electrode disposed below the second region,
Touch input device. 3. The method according to claim 1 or 2,
Wherein a distance between the pressure electrode disposed at the lower portion of the first region and the adjacent pressure electrode is greater than a distance between the pressure electrode disposed at the lower portion of the second region and the adjacent pressure electrode,
Touch input device. 3. The method according to claim 1 or 2,
Wherein the composition of the material forming the pressure electrode disposed below the first region is different from the composition of the material forming the pressure electrode disposed below the second region,
Touch input device. 3. The method according to claim 1 or 2,
The pressure electrode is formed in the form of a pressure electrode sheet,
Wherein the pressure electrode sheet includes a first insulating layer and a second insulating layer,
Wherein at least one of the first insulating layer and the second insulating layer is formed of one of polyimide and polyethylene terephthalate,
Touch input device. 3. The method according to claim 1 or 2,
Wherein the pressure electrode is made of at least one of copper, aluminum (A1), and silver (Ag)
Touch input device. An electrode sheet disposed on a touch input device including a display panel and used for detecting a pressure of a touch on a touch surface of the touch input device,
A first insulating layer and a second insulating layer; And
And a pressure electrode positioned between the first insulating layer and the second insulating layer,
When a pressure is applied to a touch surface of the touch input device, the display panel is bent,
As the display panel is warped, the electrical characteristics sensed by the pressure electrode change,
The magnitude of the pressure applied to the touch surface is detected according to the change amount of the electrical characteristic,
Wherein the display panel includes a first region and a second region,
The pressure detection sensitivity of the first region is higher than the pressure detection sensitivity of the second region,
Wherein a change amount of an electrical characteristic sensed when a pressure is applied to the second region is larger than a change amount of an electrical characteristic sensed when pressure is applied to the first region under the same condition of the warp of the display panel,
Electrode sheet. 11. The method of claim 10,
Wherein when the pressure is applied, the first region is bent more than the second region,
Electrode sheet. The method according to claim 10 or 11,
Wherein the pressure electrode comprises at least one single pressure electrode,
Wherein an electrical characteristic sensed by the single pressure electrode changes according to the distance change,
Electrode sheet. The method according to claim 10 or 11,
Wherein the electrode sheet is attached on the display panel,
Electrode sheet. The method according to claim 10 or 11,
Wherein a width of the pressure electrode disposed in the first region is smaller than a width of the pressure electrode disposed in the second region,
Electrode sheet. The method according to claim 10 or 11,
And a distance between the adjacent pressure electrodes of the pressure electrodes disposed in the first area is larger than a distance between adjacent pressure electrodes of the pressure electrodes disposed in the second area.
Electrode sheet. The method according to claim 10 or 11,
Wherein the composition of the material forming the pressure electrode disposed in the first region is different from the composition of the material forming the pressure electrode disposed in the second region.
Electrode sheet. The method according to claim 10 or 11,
Wherein the pressure electrode is made of at least one of copper, aluminum (A1), and silver (Ag)
Electrode sheet.

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