KR20150118861A - Touch detecting apparatus - Google Patents

Abstract

According to an embodiment of the present invention, provided is a touch detecting device which comprises: a plurality of sensor pads arranged in rows and columns; a plurality of signal wires for connecting each sensor pad to a driving device; and a plurality of sub pads for covering two sensor pads, wherein the sub pads are arranged on upper portions of the sensor pads.

Description

TOUCH DETECTING APPARATUS

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch detection apparatus, and more particularly, to a touch detection apparatus capable of detecting whether or not a touch is made with respect to an area between sensor pads spaced apart from each other.

The touch screen panel is a device for inputting a command of a user by touching a character or a figure displayed on the screen of the image display device with a finger or other contact means of a person, and is attached and used on the image display device. The touch screen panel converts a contact position that is touched by a human finger or the like into an electrical signal. The electrical signal is used as an input signal.

1 is an exploded top view of an example of a conventional capacitive touch screen panel.

1, a touch screen panel 10 includes a transparent substrate 12 and a first sensor pattern layer 13, a first insulating layer 14, and a second sensor pattern layer (not shown) sequentially formed on a transparent substrate 12 15, a second insulating film layer 16, and a metal wiring 17.

The first sensor pattern layer 13 may be connected on the transparent substrate 12 along the lateral direction and connected to the metal wiring 17 on a row-by-row basis.

The second sensor pattern layer 15 may be connected to the first insulating layer 14 along the column direction and alternately arranged with the first sensor pattern layer 13 so as not to overlap the first sensor pattern layer 13 . In addition, the second sensor pattern layer 15 is connected to the metal wiring 17 on a row basis.

When a human finger or a contact means is brought into contact with the touch screen panel 10, a change in capacitance according to the contact position is transmitted to the drive circuit side through the first and second sensor pattern layers 13 and 15 and the metal wiring 17 do. Then, the contact position is determined as the change in capacitance transferred is converted into an electrical signal.

However, the touch screen panel 10 must have a separate pattern of transparent conductive material such as indium tin oxide (ITO) on each of the sensor pattern layers 13 and 15, The insulating layer 14 must be provided to increase the thickness.

In addition, since the touch detection can be performed by accumulating the changes of capacitance slightly generated by the touch several times, it is necessary to detect the capacitance change at a high frequency. In order to sufficiently accumulate the capacitance change within a predetermined time, a metal wiring is required to maintain a low resistance, which thickens the bezel at the edge of the touch screen and generates an additional mask process.

In order to solve such a problem, a touch detection apparatus as shown in Figs. 2 and 3 has been proposed.

The touch detection apparatus shown in Figs. 2 and 3 includes a touch panel 20, a driving device 30, and a circuit board 40 connecting the two.

The touch panel 20 includes a plurality of sensor pads 22 formed on a substrate 21 and arranged in the form of a polygonal matrix and a plurality of signal wirings 23 connected to the sensor pads 22.

Each signal wiring 23 has one end connected to the sensor pad 22 and the other end extending to the lower edge of the substrate 21. The sensor pad 22 and the signal wiring 23 can be patterned on the cover glass 50. [

The driving device 30 sequentially selects a plurality of sensor pads 22 one by one to measure the electrostatic capacitance of the corresponding sensor pad 22, thereby detecting whether or not a touch is generated. More specifically, when a touch occurs on the sensor pad 22, a touch capacitance is formed between the touch generating tool (e.g., a finger) and the sensor pad 22. The touch pad 22 The response signal output from the output terminal of the output terminal becomes different. According to this principle, whether or not the sensor pad 22 is touched is detected, and when all the sensor pads 22 are operated, it is possible to grasp the touch point and the touch point.

However, as shown in Fig. 3, the plurality of sensor pads 22 are arranged apart from each other. Therefore, when a touch occurs in any one of the plurality of sensor pads 22, the detection of the corresponding touch and the detection of the touch occurrence point can be performed. However, the interval A between the sensor pads 22, That is, when a touch occurs in an area where the signal wiring 23 is to be arranged, it is difficult to recognize whether or not the touch is generated, and it is difficult to grasp the point where the touch is generated.

Accordingly, there is a need for development of a touch detection apparatus with improved accuracy with which it is possible to detect whether a touch is generated with respect to the interval A between the sensor pads 22.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional art, and it is an object of the present invention to provide a touch detection device comprising a plurality of sensor pads spaced apart from each other, do.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a plurality of sensor pads arranged in a plurality of rows and columns; A plurality of signal lines for connecting each of the sensor pads to a driving device; And a plurality of sub-pads disposed on the plurality of sensor pads and formed to cover at least two sensor pads.

The subpad may be maintained in a floating state.

The subpad may have an edge pattern and a plurality of isolated patterns spaced apart from the edge pattern by a predetermined distance.

The plurality of sensor pads and signal lines may be disposed on a first layer, and the plurality of sub-pads may be disposed on a second layer that is insulated from the first layer and stacked on the first layer.

At least one side of the plurality of sides constituting the plurality of sensor pads may be formed as a saw blade pattern composed of a plurality of line segments forming a certain angle with respect to the column direction.

Each of the plurality of signal wirings connected to the driving device may be extended and bent so as to be parallel to the saw pattern of the one side of the adjacent sensor pads.

When a touch occurs on the upper part of the sub pad, a capacitance may be formed between the sub pad and the sensor pads covered by the sub pad.

According to the embodiment, it is possible to obtain a touch detection apparatus capable of detecting touched areas between sensor pads in a touch detection apparatus including a plurality of sensor pads, and having improved visibility.

1 is an exploded top view of a conventional touch screen panel.
2 is an exploded top view of a conventional touch detection device.
3 is a plan view of a conventional touch detection apparatus.
4 is a diagram showing a configuration of a touch detection apparatus according to an embodiment of the present invention.
5 is a perspective view showing a configuration of a touch detection apparatus according to an embodiment of the present invention.
6 and 7 are circuit diagrams for explaining the touch detection operation of the touch detection apparatus according to an embodiment of the present invention.
8 is a diagram showing a configuration of a touch detection apparatus according to another embodiment of the present invention.
9 is a diagram showing a configuration of a touch detection apparatus according to another embodiment of the present invention.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software . When a part is "connected" to another part, it includes not only a direct connection but also a connection with another system in the middle.

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

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a diagram showing a configuration of a touch detection apparatus according to an embodiment of the present invention.

Referring to FIG. 4, the touch detection apparatus includes a touch panel 100 and a driving apparatus 200.

The touch panel 100 includes a first layer 110 and a second layer 120. The first layer 110 includes a plurality of signal pads 111 and a plurality of signal pads 112 connected to the respective sensor pads 111. The plurality of sensor pads 111 are arranged to form a plurality of rows and columns.

The plurality of sensor pads 111 may be rectangular or rhombic, and may be in the form of a uniform polygon. The sensor pads 111 may be arranged in the form of a matrix of adjacent polygons.

The second layer 120 is disposed on top of the first layer 110. The second layer 120 includes a plurality of sub-pads 121. The plurality of sub-pads 121 are arranged to form a plurality of rows and columns. Each of the sub-pads 121 is disposed so as to cover the gap between the adjacent two sensor pads 111. At least a portion of each subpad 121 covers at least two sensor pads 111 of the adjacent sensor pads 111. The sub pad 121 may be disposed so as to cover two sensor pads 111 spaced apart from each other in the row direction and between the two sensor pads 111 adjacent to each other in the column direction, And two sensor pads 111 spaced apart from each other in the row direction and spaced therebetween and two sensor pads 111 spaced adjacent in the column direction, And the gap therebetween.

The center of the sub pad 121 may be disposed between two adjacent sensor pads 111. The arrangement relationship between the first layer 110 and the second layer 120 will be described with reference to FIG.

The driving device 200 may include a touch detection unit 210, a touch information processing unit 220, a memory 230, a control unit 240, and the like, and may include one or more integrated circuit Lt; / RTI >

The touch detection unit 210, the touch information processing unit 220, the memory 230, and the control unit 240 may be separated, or two or more components may be integrated.

The touch detection unit 210 may include a plurality of switches and a plurality of capacitors connected to the sensor pad 111 and the signal line 112. The touch detection unit 210 receives signals from the control unit 240 to drive circuits for touch detection, And outputs a voltage corresponding to the detection result. The touch detection unit 210 may include an amplifier and an analog-to-digital converter. The touch sensing unit 210 may convert, amplify or digitize the voltage variation of the sensor pad 111 and store the same in the memory 230.

The touch information processing unit 220 processes the digital voltage stored in the memory 230 to generate necessary information such as touch state, touch area, and touch coordinates.

The memory 230 stores the digital voltage based on the difference in the voltage change detected from the touch detection unit 210, predetermined data used for touch detection, area calculation, touch coordinate calculation, or data received in real time.

The control unit 240 controls the touch detection unit 210 and the touch information processing unit 220 and may include a micro control unit (MCU), and may perform predetermined signal processing through the firmware.

5 is a perspective view showing the configuration of a touch panel 100 according to an embodiment of the present invention, and is a diagram for explaining the arrangement relationship of the first layer 110 and the second layer 120. As shown in FIG.

Referring to FIG. 5, the first layer 110 and the second layer 120 are disposed one above the other. In FIG. 5, the second layer 120 is disposed above the first layer 110. However, it should be understood that the second layer 120 is disposed in the opposite direction.

5, a first insulating layer 510, a first layer 110, a second insulating layer 520, a second layer 120, an adhesive film 530, a glass plate (not shown) 540 are stacked.

The second layer 120 may be disposed on the first layer 110. The first layer 110 and the second layer 120 may be formed of a transparent conductive material such as indium-tin-oxide (ITO).

The first insulating layer 510 and the second insulating layer 520 provide insulation between the first layer 110 and the second layer 120 and between the first layer 110 and other circuit components. The first insulating layer 510 and the second insulating layer 520 may be formed of transparent plastic or the like and preferably made of polyethylene terephthalate (PET) having excellent heat resistance and rigidity . When the touch panel 100 according to an embodiment of the present invention is disposed on a display device, the first insulating layer 510 may be a cover glass of the display device.

The adhesive film 530 is a component for bonding between components, and it is preferable to use a material excellent in antistatic function. For example, the adhesive film 530 may be implemented with an optically clear adhesive (OCA) film. The adhesive layer 530 may be interposed only between the second layer 120 and the glass plate 540. The adhesive layer 530 may be interposed between the first layer 110 and the second insulation layer 520, An additional adhesive layer (or an adhesive film) may be further formed.

The glass plate 550 serves as a medium for protecting the touch panel from the outside and forming a capacitance between the touch generating tool (e.g., a human finger, etc.) and the sensor pad 111.

Hereinafter, a touch detection operation of the touch detection apparatus according to an embodiment of the present invention will be described.

6 is a circuit diagram for explaining a touch detection operation according to an embodiment of the present invention.

6, the touch detection unit 210 includes a transistor 211 connected to the sensor pad 111 through the signal line 112 and connected to the output terminal N1 of the sensor pad 111 and performing a switching operation, , A parasitic capacitance Cp, a driving capacitance Cdrv, and a common voltage capacitance Cvcom.

The transistor 211 is turned on or off by a control signal Vg as a field effect transistor, for example, to supply and cut off the charging signal Vb to the sensor pad 111. [ The control signal Vg and the charge signal Vb may be controlled by the control unit 240 (see FIG. 4), and other elements capable of performing the switching operation instead of the transistor 211 may be used.

The parasitic capacitance Cp is the parasitic capacitance associated with the sensor pad 111. [ The common voltage electrostatic capacity Cvcom is applied between the common electrode (not shown) of the display device and the touch panel 100 when the touch panel 100 (see FIG. 4) is mounted on a display device Is the capacitance formed. A common voltage Vcom such as a square wave is applied to the common electrode by the display device. The common voltage capacitance Cvcom may be included in the parasitic capacitance Cp as a kind of parasitic capacitance. The common voltage capacitance Cvcom may be a parasitic capacitance Cp).

The driving electrostatic capacitance Cdrv is a capacitance formed in a path for supplying an alternating voltage Vdrv alternating at a predetermined frequency for each sensor pad 111. [ The alternating voltage Vdrv applied to the driving electrostatic capacitance Cdrv is preferably a square wave signal.

Meanwhile, as shown in FIG. 6, the touch generating tool F may touch a gap between a plurality of sensor pads 111_1 and 111_2 to generate a touch. At this time, assuming that the sub pad 121 is not provided, no touch capacitance is formed between the touch generating tool F and the sensor pads 111_1 and 111_2. As described later, it is determined whether a touch is generated by measuring a change in the touch capacitance. If the touch capacitance between the touch generating tool F and the sensor pads 111_1 and 111_2 is not formed, Which leads to an error in touch detection.

However, according to the embodiment of the present invention, since the sub pad 121 is formed to cover the space between the sensor pads 111_1 and 111_2, a touch occurs in the free space between the sensor pads 111_1 and 111_2 The touch capacitance Ct2 is formed between the touch generation tool F and the sub pad 121 and another touch capacitance Ct2_1 is generated between the sub pad 121 and the sensor pads 111_1 and 111_2. Ct2_2) are formed. That is, even if a touch occurs in a region between the plurality of sensor pads 111_1 and 111_2, the touch capacitances Ct2, Ct2_1 and Ct2_2 are formed because the sub pad 121 is disposed at the corresponding point, Lt; / RTI > The sub pad 121 may be maintained in a floating state not connected to any signal as shown in the figure.

The touch detection operation when a touch occurs in an area between adjacent sensor pads 111_1 and 111_2 will be described in detail with reference to FIG.

The combined capacitance of the touch capacitances Ct2, Ct2_1 and Ct2_2 formed by the touch generating tool F, the sub pad 121 and the sensor pads 111_1 and 111_2, that is, the touch generating tools F Quot; Ct " to describe the composite electrostatic capacitance that can be equivalently connected to the sensor pad 111_2 by the touch of the touch sensor 111_2, and the operation of the touch detection unit 210 of FIG. 6 will be described.

First, the transistor 211 is turned on by the control signal Vg and the charging signal Vb is supplied. At this time, the output voltage Vo of the sensor pad 111_2 becomes the charging voltage Vb, and the charging voltage Vb is also applied to the parasitic capacitance Cp, the driving capacitance Cdrv and the common voltage capacitance Cvcom. The charge is charged.

When the charging of the sensor pad 111_2 is completed by the charging signal Vb, the transistor 211 is turned off. Thus, the charges charged in the touch capacitance Ct, the parasitic capacitance Cp, the drive capacitance Cdrv, and the common voltage capacitance Cvcom are isolated. At this time, in order to stably isolate the charged charge, the input terminal of the operational amplifier A may be formed with a high impedance.

A state in which the charge charged to the sensor pad 111_2 is isolated is referred to as a floating state.

In this floating state, when the alternating voltage Vdrv applied to the driving capacitance Cdrv rises from a low level to a high level, the output voltage Vo of the sensor pad 111_2 rises momentarily, When the alternating voltage Vdrv falls from the high level to the low level, the output voltage Vo of the sensor pad 111_2 drops instantaneously. The rise and fall of the output voltage Vo have different values depending on the capacitance connected to the sensor pad 111_2.

Only the driving capacitance Cdrv and the parasitic capacitance Cp can be equalized in a state of being connected to the sensor pad 111_2 when the touch is not generated and the driving capacitance Cdrv and the parasitic capacitance Cp And the touch capacitance Ct is connected to the sensor pad 111_2.

Therefore, it is possible to detect whether or not the touch is generated by observing the change in the magnitude of the output voltage Vo of the sensor pad 111_2.

Hereinafter, touch detection in the case where a touch by the touch generating tool F occurs in the interval between the neighboring sensor pads 111_1 and 111_2 will be described.

FIG. 7 is a detailed view illustrating a layout structure between a sensor pad and a subpad according to an embodiment of the present invention. Referring to FIG.

7, the sub pad 121 is disposed to cover all of the adjacent sensor pads 111_1 and 111_2, and the layer in which the sensor pads 111_1 and 111_2 are disposed and the subpad 121 is disposed. Spaced apart.

The touch generating tool F may generate a touch on the upper portion of one of the first sensor pad 111_1 and the second sensor pad 111_2 adjacent to each other when viewed from the side, (B), not the upper part of the sensor pad of the first sensor pad 111_1 and the second sensor pad 111_2 but the area between them.

Since the touch generating tool F is present in the upper area of the first sensor pad 111_1, the touch generating tool F may be located in the first area corresponding to the overlap area where the first sensor pad 111_1 is covered A touch capacitance Ct1 is formed. The second touch capacitance Ct2 is formed between the touch generating tool F and the sub pad 121 since the touch generating tool F covers the upper portion of the sub pad 121. [ On the other hand, between the sub pad 121 and the first sensor pad 111_1, which are kept in a floating state, and between the sub pad 121 and the second sensor pad 111_2, a third touch capacitance Ct2_1 and a fourth touch capacitance The capacitance Ct2_2 is formed.

As a result, in the case of A, the first touch pad 111_1 is equivalent to the first touch capacitance Ct1, the second touch capacitance Ct2 and the third touch capacitance Ct3 connected to each other, And the second touch capacitance Ct2 and the fourth touch capacitance Ct4 are connected to the second switch 111_2.

That is, synthesized capacitances of different sizes are connected to the first sensor pad 111_1 and the second sensor pad 111_2 by the generation of the touch. Accordingly, when the first sensor pad 111_1 and the second sensor pad 111_2 are touched, the output voltage change is detected from all the two sensor pads 111_1 and 111_2. If the difference in magnitude between the third touch capacitance Ct2_1 and the fourth touch capacitance Ct2_2 is negligible with respect to the magnitude of the first touch capacitance Ct1, The influence of the touch capacitance Ct1 is further exerted, so that the change in the output voltage is relatively larger. As a result, it is determined that the touch generation is made close to the first sensor pad 111_1.

On the other hand, in case of B, the touch generating tool F is present between the first sensor pad 111_1 and the second sensor pad 111_2. That is, since the touch generating tool F does not overlap with the upper area of the sensor pads 111_1 and 111_2 at all, there is no capacitance directly formed between the touch generating tool F and the sensor pads 111_1 and 111_2. However, the second touch capacitance Ct2 is still formed depending on the relationship between the touch generating tool F and the sub pad 121. Accordingly, the sub pad 121 and the two sensor pads 111_1 and 111_2 are formed, The third touch capacitance Ct2_1 and the fourth touch capacitance Ct2_2 are formed between the first touch capacitance Ct2_1 and the second touch capacitance Ct2_2.

The second touch capacitance Ct2 and the third touch capacitance Ct2_1 are affected by the first sensor pad 111_1 and the second touch capacitance Ct2 is applied to the second sensor pad 111_2. And the fourth touch capacitance Ct2_2.

The third touch capacitance Ct2_1 and the fourth touch capacitance Ct2_2 are different from each other depending on which of the first sensor pad 111_1 and the second sensor pad 111_2 is closer to the sensor pad. .

 6 is performed on the first sensor pad 111_1 and the second sensor pad 111_2 and the magnitude of the output voltage change of each of the sensor pads 111_1 and 111_2 is observed, It becomes a region between the first sensor pad 111_1 and the second sensor pad 111_2 so that it is possible to know which sensor pad is closer to the sensor pad.

That is, assuming that the sub pad 121 is absent, the touch capacitance is not formed when a touch occurs in the area between the sensor pads 111_1 and 111_2, 121 of the sensor pads 111_1 and 111_2 can detect the occurrence of a touch even if a touch occurs in the area between the sensor pads 111_1 and 111_2 and can detect an increase or decrease in the output voltage Vo of the sensor pads 111_1 and 111_2 It is possible to accurately grasp the position of the touch occurrence.

8 is a diagram showing a configuration of a touch detection apparatus according to another embodiment of the present invention.

8, each of the plurality of sub-pads 121 disposed on the second layer 120 on the first layer 110 on which the plurality of sensor pads 111 are formed has a pattern different from that described with reference to Fig. .

Specifically, each of the sub-pads 121 may be formed of a plurality of isolated patterns 121_2a and 121_2b disposed within the edge pattern 121_1 and the edge pattern 121_1 at a certain distance from the edge pattern 121_1. have. Although FIG. 8 shows two isolated patterns 121_2a and 121_2b, the number of isolated patterns 121_2a and 121_2b may be three or more.

As described above, the sub pad 121 is maintained in a floating state not connected to any signal, so that the isolation patterns 121_2a and 121_2b are also maintained in a floating state. Since the isolated patterns 121_2a and 121_2b are required to form the touch capacitance with the touch generating means and also form the touch capacitance with the sensor pad 111, a part of the isolated patterns 121_2a and 121_2b is connected to the sensor pad 111 .

In addition, when a touch occurs in a region between a plurality of isolated patterns 121_2a and 121_2b formed on one subpad 121, it is difficult to detect the corresponding touch point. Therefore, the interval between the isolated patterns 121_2a and 121_2b Sectional area smaller than the minimum cross-sectional area of the generating means.

8, the touch generated by the touch generating means occurs in the area T between the first sensor pad 111_1 and the second sensor pad 111_2. However, when the touch area T is very narrow It is assumed that the first isolation pattern 121_2a of the sub pad 121 formed to cover the first sensor pad 111_1 and the second sensor pad 111_2 overlaps only the upper area of the edge pattern 121_1 . First, a touch capacitance is formed between the touch generating means and the edge pattern 121_1 by the generation of a touch, and a touch capacitance is formed between the edge pattern 121_1 and the first sensor pad 111_1, the edge pattern 121_1, (111_2). It can be determined that the touch region T is located between the first sensor pad 111_1 and the second sensor pad 111_2 through the detection of the capacitance. On the other hand, a touch capacitance is formed between the touch generating means and the first isolation pattern 121_2a by the generation of a touch, and a capacitance is also formed between the first sensor pad 111_1 and the first isolation pattern 121_2a . On the other hand, since the second isolation pattern 121_2b does not overlap with the touch region T, a touch capacitance is not formed between the second isolation pattern 121_2b and the touch generating means. Accordingly, a capacitance is not formed between the second isolation pattern 121_2b and the second sensor pad 111_2. Accordingly, it is possible to accurately determine the touch generation point as the upper region of the first isolation pattern 121_2a among the regions between the first sensor pad 111_1 and the second sensor pad 111_2. That is, according to the embodiment shown in FIG. 8, even when the touch generating means having a narrow cross-sectional area is used, an accurate touch generation point can be determined in an area between the sensor pads 111_1 and 111_2.

9 is a diagram showing a configuration of a touch detection apparatus according to another embodiment of the present invention.

Referring to FIG. 9, it can be seen that the patterns of the sensor pads and the signal lines are different from those of the embodiments described with reference to FIGS.

In particular, at least one side of the sensor pads 911 disposed in the first layer 910 may be formed in a saw-tooth pattern. The side formed by the saw blade pattern may be a side parallel to the column direction among the sides constituting the sensor pad 911.

In other words, one side of the sensor pad 911 may include one or more line segments 911_1 and 911_2 forming a certain angle with respect to a straight line parallel to the column direction. One or more line segments 911_1 and 911_2 may be in contact with each other to form a protrusion outside the sensor pad 911 or a recess may be formed inward.

On the other hand, the signal lines 912 connected to the respective sensor pads 911 can be extended and bent so as to be parallel to one side of the adjacent sensor pads 911. For example, the signal wiring 912 may be formed in a saw blade pattern that extends and bends at a predetermined angle so as to be parallel to the projection or recess formed on one side of the sensor pad 911.

As in the present embodiment, when one side of the sensor pad 911 is formed as a saw blade pattern, the linear area in the pattern of the sensor pad 911 is reduced. When the straight line region is extended to the sensor pad 911, an electrostatic discharge (ESD) is concentrated on a region where a straight line and a straight line meet, thereby causing damage to the sensor pad 911. As shown in FIG. 9, When the straight line area is reduced, phenomena such as breakage due to electrostatic discharge (ESD) are reduced.

Meanwhile, the touch detection device including the touch panel 900 may be stacked on the display device or may be embedded therein. At this time, a pixel layer is disposed under the touch panel 900.

The pixel layer means a color filter formed on a surface (upper surface or lower surface) of a liquid crystal layer for displaying an image and is a color filter formed by a pixel unit of red, green and blue (hereinafter referred to as R, G and B) So that color can be implemented. At this time, the pixel layer includes a plurality of pixels including R, G, and B subpixels.

The sensor pad 911 and the signal wiring 912 are arranged so as to cover the red, green and blue pixels included in the pixel layer. There is a difference in the degree of covering or covering. Since the intervals between the sensor pads 911 and the signal wirings 912 are different from region to region, each pixel has a different color temperature depending on the light transmittance of the sensor pads 911 and the signal wirings 912 And the color difference is generated at an arbitrary position.

9, the gap between the sensor pad 911 and the signal wiring 912 does not differ from region to region, and one side of the sensor pad 911 having a certain angle with respect to the column direction The R, G, and B subpixels evenly pass through the unit pixel, so that the color temperature difference from each pixel is eliminated. On the other hand, the rainbow phenomenon in which the color difference is minimized and scattered by rainbow light can be prevented.

9 shows that the sensor pad 911 is a saw blade pattern and the sub pad 121 is rectangular. However, the sub pad 121 may also be formed in a saw blade pattern like at least one sensor pad 911 have. According to this, the visibility of the display device applied together with the present touch detection device can be further improved.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100, 900: Touch panel
110, 910: first layer
111, 911: sensor pad
112, 912: signal wiring
120: Second layer
121: Subpad
200: Driving device
210:
220: Touch information processor
230: Memory
240:
510: first insulating layer
520: second insulating layer
530: Adhesive film
540: Glass plate

Claims (7)

A plurality of sensor pads arranged in a plurality of rows and columns;
A plurality of signal lines for connecting each of the sensor pads to a driving device; And
And a plurality of sub-pads disposed on the plurality of sensor pads and formed to cover at least two sensor pads. The method according to claim 1,
And the subpad is held in a floating state. The method according to claim 1,
Wherein the subpad has an edge pattern and a plurality of isolated patterns spaced apart from the edge pattern by a predetermined distance. The method according to claim 1,
Wherein the plurality of sensor pads and the signal wiring are disposed in a first layer,
Wherein the plurality of sub-pads are disposed on a second layer which is insulated from the first layer and stacked on the upper layer. The method according to claim 1,
Wherein at least one side of the plurality of sides constituting the plurality of sensor pads is formed as a saw blade pattern composed of a plurality of line segments forming a certain angle with respect to the column direction. 6. The method of claim 5,
Wherein each of the plurality of signal wirings connected to the driving device is extended and bent so as to be in parallel with the saw blade pattern of the one side of the adjacent sensor pads. The method according to claim 1,
And a capacitance is formed between the sub pads and the sensor pads covered by the sub pads when a touch occurs on the sub pads.

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