KR20150045676A - Touch panel and display device using the same - Google Patents

Abstract

The present invention relates to a touch panel, and in particular, to provide a touch panel and a display device using the touch panel, which can increase a capacitance in the edge portion by forming a dummy pattern in an edge portion of the touch panel . To this end, a touch panel according to the present invention includes: a substrate; A plurality of driving electrodes formed on the substrate and receiving drive pulses; A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And an edge intersecting region formed at an edge portion of the substrate among the intersecting regions where the driving electrodes and the receiving electrodes cross each other and are formed of a metal material so that the capacitances of the edge intersecting regions Lt; / RTI >

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch panel,

The present invention relates to a touch panel, and more particularly, to a touch panel attached to a top surface of a panel and a display using the same.

The touch panel includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescent display (ELD) Such as an electrophoretic display (EPD), and is a type of an input device for allowing a user to directly input information by touching the screen with a finger or a pen while viewing the display device.

The touch panel may be configured in various forms according to the arrangement position in the display device.

First, the touch panel may be configured as a form (in-cell type) in which two electrodes constituting the touch panel are formed on the same layer of the TFT substrate constituting the liquid crystal display device.

Secondly, the touch panel is formed in a form (an add-on type) in which a film on which a touch electrode is formed is attached to the tempered glass, or after the touch electrode is formed on the tempered glass itself, It is possible.

Although the touch panel of the in-cell type is generally applied to a liquid crystal display device, the touch panel of the add-on type can be attached to the upper surface of the panel constituting the display device regardless of the type of the display device.

FIG. 1 is an exemplary view showing the appearance of a conventional display device, and FIG. 2 is an exemplary view showing a layout structure of driving electrodes and receiving electrodes of a conventional touch panel.

Conventionally, since a product has been developed focusing on the functions of the touch panel as described above, studies on a bezel corresponding to a non-display area of a panel or a display device have not been actively conducted. Therefore, as shown in Fig. 1 (a), the width of the bezel is wide.

However, in recent years, not only a function of a display device but also a design of a display device have been actively researched. Particularly, researches on a design capable of reducing the width of the bezel have been actively conducted. Therefore, as shown in Fig. 1 (b), a display device has been developed in a form in which the width of the bezel is reduced compared with the conventional one.

As shown in Fig. 1, the bezel refers to an outline of a display device, and refers to a non-display area in which no image is output. As shown in Fig. 1, the bezel may be a non-display area in a state where a case or the like is mounted, or may be a non-display area of the panel itself. Generally, since the width of the bezel of the display device depends on the width of the bezel of the panel, researches for reducing the width of the bezel of the panel have been actively conducted.

On the other hand, in recent years, as the functions of the display apparatus have diversified, display apparatuses have been developed in such a direction as to increase the size of the display region in which the image is output.

Particularly, the design of a display device in the direction of reducing the width of the bezel is being developed so that the size of the display area can be increased while maintaining the size of the display device itself.

However, the conventional display device has a limitation in reducing the width of the bezel.

For example, the conventional touch panel 30 including five driving electrodes TX1 to TX5 for receiving driving pulses and five receiving electrodes RX1 to RX5 for receiving a sensing signal is shown in Fig. 2 As shown in a), twenty touch coordinates 36 may be generated.

Here, as shown in the enlarged quadrangle (x) of FIG. 2A, in the capacitive touch panel, the driving electrode TX3 and the receiving electrode RX4 intersect each other. Generally, the touch sensitivity in a region where the driving electrode and the receiving electrode intersect (hereinafter, simply referred to as an intersecting region) u is smaller than the touch sensitivity in a region u 'in which the driving electrode and the receiving electrode are simply adjacent to each other It is better than sensitivity.

2 (a), in the conventional touch panel, a region where the driving electrode and the receiving electrode cross each other, that is, an area indicated by the touch coordinates 36, (A / A: Active Area), and its outer region is formed in a bezel. That is, in the touch panel, the driving electrode and the receiving electrode are formed so as to cross each other, but an area not included in the display area A / A is called an over scan area, and an overscan area is a bezel, As shown in Fig. That is, the larger the overscan region, the greater the width of the bezel.

Meanwhile, in order to reduce the width of the bezel, the conventional touch panel may be configured such that the overscan region is cut off, as shown in FIG. 2 (b).

That is, the touch panel 30 'shown in FIG. 2B has the same number of touch coordinates 36' as the touch panel 30 shown in FIG. 2 (a) As shown in Fig. However, the overscan area formed on the bezel of the touch panel 30 'shown in FIG. 2 (b) is different from the overscan area of the touch panel 30 shown in FIG. 2 (a) And is cut to be very small. Therefore, the width of the bezel can be reduced since the portion occupied by the overscan region is reduced.

However, as shown in the enlarged quadrangle (y) of FIG. 2 (b), the driving electrode and the receiving electrode formed at the outermost edge of the touch panel (hereinafter simply referred to as an edge portion) The intersection area and the area where the driving electrode and the reception electrode are adjacent to each other are formed in the central part of the touch panel (hereinafter, simply referred to as a "center part") as shown in an enlarged quadrangle (x) The area where the driving electrode and the receiving electrode intersect, and the area where the driving electrode and the receiving electrode are adjacent to each other.

In this case, the numerical value of the capacitance of the edge portion E becomes significantly smaller than the numerical value of the capacitance of the center portion C.

Therefore, assuming that the touch panel 30 'shown in FIG. 2 (b) forms 20 touch coordinates 36' by four driving electrodes and five receiving electrodes as described above Touch senses in the eight touch coordinates formed at the outermost edge of the display area A / A, that is, the edge E corresponding to the right and left sides of the touch panel 30 ' The touch sensitivity at the twelve touch coordinates formed at the central portion C of the touch screen is less than that of the touch screen.

Therefore, there is a limit in reducing the over scan area formed on the outer edge of the touch panel.

2 (b), in the touch panel 30 'in which the over scan area not included in the display area A / A is minimized, the touch panel 30' The touch sensitivity at the edge portion E is smaller than the capacitance at the center portion C of the touch panel 30 'because the capacitance at the edge portion E of the touch panel 30' becomes smaller than the capacitance at the center portion C of the touch panel 30 ' ) Is lower than the touch sensitivity in the case of the touch sensor.

In addition, the edge portion E may be formed in the vertical direction even though the edge portion E does not exist in the vertical direction of the panel 30 or 30 'shown in FIG. In this case, the touch sensitivity at the edge portion E in the up and down direction may also be lower than the touch sensitivity at the center portion C.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and provides a touch panel and a display device using the touch panel capable of increasing a capacitance at the edge portion by forming a dummy pattern in an edge portion of the touch panel do.

It is another object of the present invention to provide a touch panel and a display device using the same that can reduce a capacitance at the center by forming a ground pattern at the center of the touch panel do.

According to an aspect of the present invention, there is provided a touch panel including: a substrate; A plurality of driving electrodes formed on the substrate and receiving drive pulses; A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And an edge intersecting region formed at an edge portion of the substrate among the intersecting regions where the driving electrodes and the receiving electrodes cross each other and are formed of a metal material so that the capacitances of the edge intersecting regions Lt; / RTI >

According to an aspect of the present invention, there is provided a display device including: a panel; And a touch panel attached to the panel, wherein the touch panel includes: a plurality of driving electrodes formed on the substrate and receiving a driving pulse; A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And an edge intersecting region formed at an edge portion of the substrate among the intersecting regions where the driving electrodes and the receiving electrodes cross each other and are formed of a metal material so that the capacitances of the edge intersecting regions Lt; / RTI >

According to another aspect of the present invention, there is provided a touch panel including: a substrate; A plurality of driving electrodes formed on the substrate and receiving drive pulses; A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And a center electrode formed in each of the center electrode intersection areas formed at the central part of the substrate among the intersection areas in which the driving electrodes and the reception electrodes intersect and is formed of a metal material to reduce the capacitance of the center electrode intersection area And ground patterns.

According to another aspect of the present invention, there is provided a display device comprising: a panel; And a touch panel attached to the panel, wherein the touch panel comprises: a substrate; A plurality of driving electrodes formed on the substrate and receiving drive pulses; A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And a center electrode formed in each of the center electrode intersection areas formed at the central part of the substrate among the intersection areas in which the driving electrodes and the reception electrodes intersect and is formed of a metal material to reduce the capacitance of the center electrode intersection area And ground patterns.

According to the present invention, since the dummy pattern is formed at the edge of the touch panel, the capacitance at the edge portion can be increased, so that the difference between the capacitance at the edge portion and the capacitance at the center portion of the touch panel Can be reduced. Accordingly, the difference between the touch sensitivity at the center portion and the touch sensitivity at the edge portion can be reduced.

According to the present invention, since the ground pattern is formed at the central portion of the touch panel, the capacitance at the center portion can be reduced, and the difference between the capacitance at the center portion and the capacitance at the edge portion of the touch panel is reduced . Accordingly, the difference between the touch sensitivity at the center portion and the touch sensitivity at the edge portion can be reduced.

1 is an exemplary view showing the appearance of a conventional display device.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch panel.
3 is a view schematically showing a configuration of a display device according to the present invention.
4 is an exemplary view for explaining a touch panel according to the first embodiment of the present invention;
Fig. 5 is an enlarged view of each part of the touch panel shown in Fig. 4; Fig.
6 is an exemplary view for explaining a touch panel according to a second embodiment of the present invention;
FIG. 7 is an enlarged view of each portion of the touch panel shown in FIG. 6; FIG.

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

Hereinafter, the present invention will be described with reference to a liquid crystal display device for convenience of explanation, but the present invention is not limited thereto. That is, the present invention can be applied to various display devices that can be configured as an add-on type touch panel.

3 is a view schematically showing a configuration of a display device according to the present invention.

3, the panel 100 in which pixels are formed for each intersection region of the gate line and the data line, and the driving electrode lines 133 connected to the driving electrodes are formed on the bezel A touch panel 130 mounted on the top surface of the panel 100, a driving unit 200 for driving the panel 100, and a touch panel 130, And a touch IC 300 for driving the touch IC 300.

First, the panel 100 is attached to the touch panel 130 by a bonding part such as UV resin, OCR (Optically Clear Resin), or OCA (Optically Clear Adhesive).

When the panel 100 is a liquid crystal panel, a lower substrate (TFT substrate) of the panel 100 is provided with a plurality of data lines, a plurality of gate lines crossing the data lines, A plurality of TFTs (Thin Film Transistors) formed at intersections of the gate lines, a plurality of pixel electrodes for charging the data voltage to the pixels, and a common electrode for driving the liquid crystal filled in the liquid crystal layer together with the pixel electrodes are formed do. The pixels are arranged in a matrix form by an intersection structure of the data lines and the gate lines.

A black matrix (BM) and a color filter are formed on an upper substrate (CF substrate) of the panel 100.

Polarizing plates POL1 and POL2 are attached to the upper glass substrate and the lower glass substrate of the panel 100 and an alignment film for setting the pretilt angle of the liquid crystal is formed on the inner surface in contact with the liquid crystal. A column spacer CS for maintaining a cell gap may be formed between the upper glass substrate and the lower glass substrate of the panel 100.

However, as described above, the panel 100 may be formed in various types and shapes other than the liquid crystal panel.

The panel 100 is divided into a display area S for outputting an image and a non-display area K, that is, a bezel, which is formed outside the display area S and does not output an image.

The touch panel 130 performs a function of sensing whether a user touches the touch panel 130. Particularly, the touch panel 130 applied to the present invention is a capacitive touch panel using a mutual method. to be. The touch panel 130 of the capacitive type using the mutual method includes driving electrodes TX1 to TX4 and receiving electrodes RX1 to RX5.

The touch panel 130 includes a display area S of the panel 100 and a bezel K. [ In FIG. 3, for convenience of explanation, '130', which designates the touch panel 130, is shown at a position corresponding to the display area S, And a bezel (B) outside the region (S).

The touch panel 130 includes the driving electrode wires 133 and the receiving electrode wires 134 formed on the display area S and the bezel K. [

The driving electrodes 131 and the receiving electrodes 132 are formed on a glass substrate in a lattice form.

The driving electrode wires 133 connected to the driving electrodes 131 and the receiving electrode wires 134 connected to the receiving electrodes 132 are formed on the bezel K. [ The driving electrode lines 133 and the receiving electrode lines 134 may be connected to the touch IC 300 through the driving unit 200 or directly to the touch IC 300.

The driving electrode lines 133 may be formed of a plurality of layers in the bezel K.

The driving unit 200 drives the panel 100 and includes a gate driver for inputting a scan pulse to a gate line formed on the panel 100, A data driver for inputting the data voltage into the data line, and a timing controller for controlling the functions of the gate driver and the data driver.

First, the data driver converts the digital image data transmitted from the timing controller into a data voltage, and supplies the data voltage of one horizontal line to the data line (data line) for each horizontal period in which a pull-up signal Lines.

The data driver converts the image data into the data voltage using gamma voltages supplied from a gamma voltage generator (not shown), and outputs the data voltage to the data line. To this end, the data driver 300 includes a shift register unit, a latch unit, a digital-analog converter (DAC), and an output buffer.

The shift register unit outputs a sampling signal using data control signals (SSC, SSP, etc.) received from the timing controller.

The latch unit latches the digital image data (Data) sequentially received from the timing controller, and simultaneously outputs the latched digital image data (Data) to the digital-analog converter (DAC).

The digital-to-analog converter converts the image data transmitted from the latch unit into a data voltage of positive or negative polarity and outputs the same. That is, the digital-to-analog converter converts the image data into a positive polarity signal or a negative polarity signal according to the polarity control signal POL transmitted from the timing controller, using the gamma voltage supplied from the gamma voltage generator (not shown) Polarity data voltage and outputs the data voltage to the data lines.

The output buffer outputs the positive or negative polarity data voltage transmitted from the digital-analog converter to the data lines (DL) of the panel in accordance with the source output enable signal (SOE) transmitted from the timing controller do.

Second, the timing controller uses a timing signal input from an external system (not shown), that is, a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, and a data enable signal DE, A data control signal DCS for controlling the operation timing of the data driver, and generates image data to be transmitted to the data driver.

The timing controller may include a receiver for receiving input image data and timing signals from the external system, a control signal generator for generating various control signals, a rearrangement unit for rearranging the input image data, A data arrangement unit for outputting the image data, and an output unit for outputting the control signals and the image data.

That is, the timing controller rearranges input image data input from the external system according to the structure and characteristics of the panel 100, and transmits the rearranged image data to the data driver. Such a function can be executed in the data arrangement section.

The timing controller uses the timing signals transmitted from the external system, that is, the vertical synchronization signal (Vsync), the horizontal synchronization signal (Hsync), and the data enable signal (DE) Generates a gate control signal (GCS) for controlling the control signal (DCS) and the built-in gate driver, and transmits the control signals to the data driver and the embedded gate driver. This function can be executed in the control signal generation unit.

The gate control signals GCS generated by the control signal generator include a gate output enable signal GOE, a gate start signal VST, a clock signal CLK, and the like.

The data control signals generated by the control signal generator include a source start pulse SSP, a source shift clock signal SSC, a source output enable signal SOE, and a polarity control signal POL.

Third, the gate driver sequentially supplies a pull-up signal (scan pulse) to each of the gate lines using gate control signals (GCS) supplied from the timing controller.

The gate control signal GCS may include at least two clocks (CKL) and at least two or more power sources.

The pull-up signal (scan pulse) refers to a voltage capable of turning on the switching thin film transistor connected to the gate lines. The voltage that can turn off the switching thin film transistor is called a pull-down signal, and the pull-up signal and the pull-down signal are collectively referred to as a scan signal.

When the thin film transistor is of the N type, the pull-up signal is a high level voltage and the pull-down signal is a low level voltage. When the thin film transistor is of the P type, the pull-up signal is a low level voltage and the pull-down signal is a high level voltage.

The gate driver sequentially outputs the pull-up signal to the gate lines using the clocks and power supplies supplied from the timing controller.

The gate driver may include a shift register for sequentially outputting the pull-up signal to a plurality of gate lines, a clock supply line for supplying various clocks to the shift register, And a power supply line unit for the power supply line.

Here, the gate driver, the data driver, and the timing controller included in the driving unit 200 may be formed of one chip (DDI) as shown in FIG. 3, , The data driver and the timing controller may be formed of the chip (DDI), and the gate driver may be formed in a form (GIP) formed on the panel.

That is, the driving unit 200 may be configured in various forms.

Finally, the touch IC 300 senses whether the touch panel 130 is touched by using a sensing signal received through the receiving electrode after applying a driving pulse to the driving electrode 131 . To this end, the touch IC 300 includes a driving pulse unit 310 for outputting a driving pulse and a receiving unit 320 for receiving a sensing signal.

The touch IC 300 may be connected to the driving electrode lines 133 and the receiving electrode lines 134 through the driving unit 200. The driving electrode lines 133 and the receiving electrode lines 134, < / RTI >

FIG. 4 is an exemplary view for explaining a touch panel according to the first embodiment of the present invention, showing only the display area S among the touch panels 130 shown in FIG. That is, the touch panel 130 includes a display area S and a bezel K, and the touch panel shown in FIG. 4 shows a display area S.

In the touch panel according to the first embodiment of the present invention, the width of the bezel B is basically minimized in order to reduce the width of the bezel K. First, the following terms are defined as follows.

First, a portion where the intersection region of the driving electrode 131 and the receiving electrode 132 is formed at the outermost portion of the touch panel 130 is simply referred to as an edge portion E. For example, in FIG. 4, the edge E may be the left and right ends of the touch panel 130. In this case, the upper and lower ends of the touch panel 130 correspond to the outermost portion of the touch panel 130, and the upper and lower ends of the touch panel 130 are located at intersections of the driving electrode 131 and the receiving electrode 132 The upper and lower ends of the touch panel 130 shown in FIG. 4 are not included in the edge portion E but correspond to a central portion to be described below.

Secondly, a crossing region formed at the edge portion E of the crossing regions of the driving electrode 131 and the receiving electrode 132 is referred to as an edge crossing region 180. In FIG. 4, the edge crossing region 180 is indicated by a circle.

Third, a region of the touch panel 130 excluding the edge portion, that is, a center portion of the touch panel 130 is simply referred to as a center portion C.

Fourth, an intersection region formed at the central portion C among the intersections of the driving electrode 131 and the receiving electrode 132 is referred to as a center intersection region. In FIG. 4, the center intersection area is indicated by a circle.

In the touch panel according to the first embodiment of the present invention, a dummy pattern D is formed in the edge portion intersection region 180 of the intersection regions of the driving electrode 131 and the reception electrode 132 .

The edge intersecting region 180 may be a crossing region formed between the driving electrode 131 and the receiving electrode 132 as shown in FIG. It says. The crossing region refers to a region (u) where the driving electrode and the receiving electrode cross each other, as described with reference to Fig. 2 (a) in the description of the prior art.

For example, in the touch panel 130 shown in FIG. 4, four driving electrodes TX1 to TX4 and five receiving electrodes RX1 to RX5 are formed. Thus, in a total of 20 intersecting regions The driving electrodes and the receiving electrodes are crossed.

Of the crossing areas, the edge intersecting area 180 is eight and is indicated by a circle.

Of the intersection areas, the center intersection area 190 is twelve and is indicated by triangle.

Each of the edge portion crossing regions 180 and the center portion crossing regions 190 may correspond to one touch coordinate. In this case, when either the edge intersection regions 180 and the intersection regions of the center portion intersection regions 190 are touched or the periphery of any one of the intersection regions is touched, the touch IC 300 or the driving unit 200 can recognize that a touch is generated in the touch coordinates corresponding to the intersecting area.

At least one of the dummy patterns D is formed in each of the edge portion crossing regions 180. For example, as shown in FIG. 5C, the two dummy patterns D are formed in the edge intersecting region 180 with a bridge formed so as to overlap with the receiving electrode May be formed on both sides of the bridge. In this case, the two dummy patterns D are formed in the same layer as the bridge. The bridge performs a function of electrically connecting two driving electrode portions formed on both sides of the receiving electrode in the edge crossing region 180. The two driving electrode portions form one driving electrode TX.

In the first embodiment of the present invention, the reason why the dummy patterns D are formed in the edge portion crossing region 180 is to increase the capacitance of the edge portion crossing region 180.

In general, in the case of a mutual capacitance type touch panel as in the present invention, the touch performance is determined by the amount of change in fringe capacitance between the driving electrode TX and the receiving electrode RX before and after touching . In this case, the larger the variation of the fringe capacitance is, the better the perception sensitivity is. Therefore, the driving electrode and the receiving electrode must have a structure in which the fringe capacitance can be generated.

However, in the touch panel 130 according to the present invention, since a part of the driving electrode and the receiving electrode formed on the existing bezel K are cut to reduce the width of the bezel, 180 are reduced.

In order to compensate for the decreased fringe capacitance, in the first embodiment of the present invention, the dummy pattern D is formed in the edge portion crossing region 180 as shown in FIG.

In order to compensate for the fringe cap formation in the edge intersection region 180, each of the edge intersection regions 180 is provided with a dummy pattern D are formed.

The structure and function of the dummy pattern D will be described with reference to Fig.

5 is an enlarged view showing each part of the touch panel shown in Fig. 4. Fig. 5 (a) is an enlarged view showing area A shown in Fig. 5, (C) is an exemplary view showing a cross section of the edge portion crossing region, and may be, for example, a cross section of the region shown in (a) or (b).

3 to 5, the structure of the touch panel 130 according to the present invention includes a substrate 110, a plurality of driving electrodes TX1 to TX4 A plurality of receiving electrodes RX1 to TX5 formed on the substrate so as to intersect with the driving electrodes and a plurality of receiving electrodes RX1 to TX5 crossing the driving electrodes and the receiving electrodes, And a dummy pattern D formed of a metal material and increasing the capacitance of the edge portion crossing region 180. The dummy patterns D are formed in each of the edge portion crossing regions 180 formed in the edge portion crossing regions 180. [

5, the receiving electrode RX forming the edge portion crossing region 180 includes first receiving electrode portions RX5 'and RX', a second receiving electrode portion RX5 ' ', RX' ') and third receiving electrode units RX5' '' and RX '' 'for connecting the first receiving electrode unit and the second receiving electrode unit.

To be more specific, each of the receiving electrodes includes a first receiving electrode unit RX ', a second receiving electrode unit RX' ', and a third receiving electrode unit RX' ''. 5A and 5B show a first receiving electrode unit RX5 'forming the fifth receiving electrode RX5 as an example of the first receiving electrode unit RX' As an example of the second receiving electrode unit RX '', a second receiving electrode unit RX5 '' for forming the fifth receiving electrode RX5 is shown, and the third receiving electrode unit RX ' ', A third receiving electrode unit RX5' '' for forming the fifth receiving electrode RX5 is shown.

The driving electrode TX forming the edge portion intersection region 180 includes a first driving electrode portion TX1 ', TX3', TX ', a second driving electrode portion TX1' ', TX' ', And a bridge 143 connecting the first driving electrode unit and the second driving electrode unit.

To be more specific, each of the driving electrodes includes a first driving electrode portion TX ', a second driving electrode portion TX' ', and a bridge 143. 5A shows a first driving electrode portion TX1 'for forming a first driving electrode TX1 as an example of the first driving electrode portion TX' As an example of the electrode portion TX '', a second driving electrode portion TX1 '' for forming the first driving electrode TX1 is shown. 5B shows a first driving electrode portion TX3 'forming the third driving electrode TX3 as an example of the first driving electrode portion TX' As an example of the second drive electrode portion TX '', a second drive electrode portion TX3 '' for forming the third drive electrode TX3 is shown.

The third receiving electrode units RX5 '' 'and RX' '' are formed to overlap with the bridge 143 and intersect the first driving electrode unit and the second driving electrode unit.

In each of the edge crossing regions 180, two dummy patterns D may be formed. For example, the first dummy patterns D1 and the second dummy patterns D2 are formed in each of the edge portion crossing regions 180 shown in FIGS. 5A and 5B.

In this case, the two dummy patterns D1 and D2 are formed in the edge intersecting region 180 in such a manner that they face each other with the receiving electrode RX crossing the driving electrode TX sandwiched therebetween Respectively. For example, in each of the edge intersecting regions 180 shown in FIGS. 5A and 5B, the third receiving electrode unit RX5 '' 'is connected to the driving electrodes TX1 and TX3, And the third driving electrode unit RX5 '' ', which intersect the first driving electrode unit TX1' and TX3 'and the second driving electrode unit TX1' 'and TX3' ', The first dummy pattern D1 and the second dummy pattern D2 are formed to face each other.

The dummy pattern D is electrically insulated from the driving electrodes, the receiving electrodes, and other adjacent dummy patterns.

For example, as shown in FIG. 5 (c), the first dummy pattern D1 and the second dummy pattern D2 are formed on the first driving electrode portion and the second driving electrode portion, 2 driving electrode portion. The first dummy pattern D1 and the second dummy pattern D2 are insulated from the first receiving electrode portion and the second receiving electrode portion forming the receiving electrode. In addition, the first dummy pattern D1 is insulated from the second dummy pattern D2.

The dummy pattern D is formed so as to overlap the driving electrodes and the spaces P spaced apart from each other by a predetermined distance.

As shown in FIG. 5C, the first dummy pattern D1 includes a first side surface and a second side surface with the receiving electrode connection portion RX '' ' And the second dummy pattern D2 is formed to overlap with the second driving electrode portion on the second side. The second driving electrode portion TX 'overlaps the second driving electrode portion TX'.

As shown in FIG. 5A, the second dummy pattern D2 includes a third dummy pattern D2 having a third receiving electrode portion RX5 'and a second driving electrode portion TX1' A third space dummy pattern 210 formed to overlap with the space, and a fourth space where the second reception electrode unit RX5 " and the second driving electrode unit TX1 " are spaced apart from each other The third space dummy pattern 210 and the fourth space dummy pattern 230 are formed to overlap with the fourth space dummy pattern 230 and the second driving electrode unit TX1 ' And a second connection dummy pattern 220 for connecting the first connection dummy pattern and the second connection dummy pattern.

5 (a), the first dummy pattern D1 may include a first dummy pattern D1, a second dummy pattern D1, and a second dummy pattern D1. A first space dummy pattern formed so as to overlap with one space P, and a second space overlapping the second receiving electrode unit RX5 '' and the second space where the first driving electrode unit TX1 ' And a first connection dummy pattern formed to overlap the first driving electrode part TX1 'and connecting the first space dummy pattern and the second space dummy pattern.

The dummy patterns increase the capacitance of the edge portion crossing region 180 in brief.

Generally, the capacitance is formed by an insulator formed between the conductors.

For example, in FIG. 5C, when the touch panel without the dummy pattern D2 is referred to as a conventional touch panel, in the conventional touch panel, the second driving electrode portion TX ' And the bridge 143 corresponds to the sum of the capacitance of the insulating film 150 and the capacitance of the substrate 110 and the air Z. [ In this case, when the capacitance of the insulating film 150 is referred to as a first capacitance C1, the capacitance of the substrate 110 is referred to as a second capacitance C 2, and the capacitance of the air Z is referred to as a third capacitance C 3 , The capacitances of the second driving electrode unit TX '' and the bridge 143 are 1 / (1 / C1 + 1 / C2 + 1 / C3).

However, in the touch panel according to the first embodiment of the present invention in which the second dummy pattern D2 is formed on the same layer as the bridge 143 as shown in FIG. 5C, The capacitance between the second driving electrode portion TX '' and the bridge 143 becomes 1 / (1 / C2 + 1 / C3). The capacitance between the second driving electrode portion TX '' and the bridge 143 is substantially the capacitance between the second dummy pattern D2 and the bridge 143. [

In this case, the capacitance (= 1 / (1 / (1 / (C1 + 1)) of the touch panel according to the first embodiment of the present invention is larger than the capacitance / C2 + 1 / C3)) is larger.

Accordingly, in the touch panel according to the first embodiment of the present invention, the capacitance in the edge crossing region 180 is increased, so that the touch sensitivity in the edge crossing region 180 can be increased have.

The sectional structure and manufacturing method of the touch panel 130 according to the present invention will be described with reference to FIG. 5 (c).

First, a black matrix (not shown) is formed on the edge of the substrate 110. The substrate 110 may be a transparent glass substrate or a transparent synthetic resin.

Next, an optical design layer 139 is formed on the entire surface of the substrate 110 including the black matrix (not shown).

The optical design layer 139 functions to improve the characteristics of light output to the outside through the substrate 110. That is, the refractive index of light passing through the substrate 110 can be improved by the optical design layer 139. The optical design layer 139 may be formed of a material such as Nb ₂ O _x or S _i O _x .

Next, on the optical design layer 139, the first dummy pattern D1, the second dummy pattern D2, and the bridge 143 are formed.

The bridge 143 electrically connects the first driving electrode portion and the second driving electrode portion forming the driving electrode 131 in the crossing region where the driving electrode 131 and the receiving electrode 132 cross each other And performs a connection function.

Next, an insulating film 150 is coated on the first dummy pattern, the second dummy pattern, and the bridge.

Next, contact holes are formed in regions of the insulating layer 150 corresponding to both ends of the bridge 143.

Next, the third receiving electrode unit RX '' 'is formed in a region of the insulating layer 150 corresponding to the bridge 143.

Next, a first driving electrode portion (RX '' ') electrically connected to the bridge (143) through a first contact hole of the contact holes is formed on the first side surface with the third receiving electrode portion And a second driving electrode portion TX '' electrically connected to the bridge 143 through a second contact hole of the contact holes is formed on the second side. That is, the first driving electrode portion TX 'and the second driving electrode portion TX' 'are electrically connected by the bridge 143.

Lastly, in order to protect the first driving electrode portion TX ', the second driving electrode portion TX' ', and the third receiving electrode portion RX' '', a protective layer 181 is formed do. The protective layer 150 may be formed of the same material as the PAC.

The touch panel 130 according to the first embodiment of the present invention manufactured through the process described above can be applied to a bonding part such as UV resin, OCR (Optically Clear Resin) or OCA (Optically Clear Adhesive) And may be attached to the panel 100 by means of an adhesive.

FIG. 6 is an exemplary view for explaining a touch panel according to a second embodiment of the present invention, showing only a display area S among the touch panels 130 shown in FIG. That is, the touch panel 130 includes a display area S and a bezel K, and the touch panel shown in FIG. 6 shows a display area S. In the following description, the same or similar contents as those described with reference to Figs. 3 to 5 are omitted or briefly described.

The width of the bezel B is minimized in order to reduce the width of the bezel K, basically in the touch panel according to the second embodiment of the present invention.

In the touch panel according to the first embodiment of the present invention, a ground pattern G is formed in the center portion intersection region 190 among intersections of the driving electrode 131 and the receiving electrode 132.

The center intersection region 180 refers to an intersection region formed at the central portion C of the intersection regions of the driving electrode 131 and the reception electrode 132 as shown in FIG.

For example, in the touch panel 130 shown in FIG. 6, four driving electrodes TX1 to TX4 and five receiving electrodes RX1 to RX5 are formed. Therefore, in a total of 20 intersecting regions The driving electrodes and the receiving electrodes are crossed.

Of the crossing areas, the edge intersecting area 180 is eight and is indicated by a circle.

Of the intersection areas, the center intersection area 190 is twelve and is indicated by triangle.

Each of the edge portion crossing regions 180 and the center portion crossing regions 190 may correspond to one touch coordinate. In this case, when either the edge intersection regions 180 and the intersection regions of the center portion intersection regions 190 are touched or the periphery of any one of the intersection regions is touched, the touch IC 300 or the driving unit 200 can recognize that a touch is generated in the touch coordinates corresponding to the intersecting area.

At least one of the ground patterns G is formed in each of the center intersecting regions 190.

For example, as shown in FIG. 7 (b), the two ground patterns G are formed in the center intersecting region 190 with a bridge formed so as to overlap with the receiving electrode, And may be formed on both sides of the bridge. In this case, the two ground patterns G1 and G2 are formed in the same layer as the bridge 143. The bridge 143 electrically connects the two driving electrode units formed on both sides of the receiving electrode in the center intersecting region 190. The two driving electrode portions form one driving electrode TX.

In the second embodiment of the present invention, the reason why the ground patterns G are formed in the center portion crossing region 190 is to reduce the capacitance of the center portion crossing region 190.

In general, in the case of a mutual capacitance type touch panel as in the present invention, the touch performance is determined by the amount of change in fringe capacitance between the driving electrode TX and the receiving electrode RX before and after touching . In this case, the larger the variation of the fringe capacitance is, the better the perception sensitivity is. Therefore, the driving electrode and the receiving electrode must have a structure in which the fringe capacitance can be generated.

However, in the touch panel 130 according to the present invention, since a part of the driving electrode and the receiving electrode formed on the existing bezel K are cut to reduce the width of the bezel, 180 are reduced.

Accordingly, the touch sensitivity in the edge intersecting region 180 is lower than the touch sensitivity in the center intersecting region 190.

In order to keep the touch sensitivity in the center portion crossing region 190 similar to the touch sensitivity in the edge portion crossing region 180, in the second embodiment of the present invention, the capacitance of the center portion crossing region is reduced A ground pattern G is formed in the center portion crossing region 190. [

The touch sensitivity in the center portion crossing region 190 and the touch sensitivity in the edge portion crossing region 180 can be reduced by decreasing the capacitance in the edge portion crossing region 180. [ And the like.

To this end, in a first embodiment of the present invention, the dummy pattern D is added to the edge portion crossing region 180 to increase the capacitance of the edge portion crossing region 180, The touch sensitivity in the center portion intersection region 190 is maintained at a similar level.

In the second embodiment of the present invention, the capacitance of the center portion crossing region 190 is reduced by adding the ground pattern G to the center portion crossing region 190, And the touch sensitivity in the center portion intersection region 190 is maintained at a similar level.

The configuration and function of the ground pattern G will be described with reference to Figs. 6 and 7. Fig.

FIG. 7 is an enlarged view showing each part of the touch panel shown in FIG. 6, wherein FIG. 7A is an enlarged view showing the F region shown in FIG. 6, and FIG. 7B is a cross- As an example, it may be, for example, a cross section of the area shown in (a).

3, 6 and 7, the structure of the touch panel 130 according to the present invention includes a substrate 110, a plurality of driving electrodes (not shown) formed on the substrate, TX1 to TX4), a plurality of receiving electrodes (RX1 to TX5) formed on the substrate so as to intersect with the driving electrodes, and a plurality of driving electrodes Formed in each of the formed central intersection regions 190 and formed of a metal material to reduce the capacitance of the center portion crossing region 190. [

The ground patterns G are connected to a ground (ground) via a ground pad GP.

7, the receiving electrode RX forming the center portion crossing region 190 includes first receiving electrode portions RX3 'and RX', a second receiving electrode portion RX '', And RX '', and third receiving electrode units RX3 '' and RX '' 'for connecting the first receiving electrode unit and the second receiving electrode unit.

To be more specific, each of the receiving electrodes includes a first receiving electrode unit RX ', a second receiving electrode unit RX' ', and a third receiving electrode unit RX' ''. 7A shows a first receiving electrode unit RX3 'forming the third receiving electrode RX3 as an example of the first receiving electrode unit RX' As an example of the electrode portion RX '', a second receiving electrode portion RX3 '' for forming the third receiving electrode RX3 is shown, and the second receiving electrode portion RX3 '' for forming the third receiving electrode RX ' As an example, a third receiving electrode unit RX3 '' 'for forming the third receiving electrode RX3 is shown.

The driving electrode TX forming the center portion intersection region 190 includes a first driving electrode portion TX 3 ', TX', a second driving electrode portion TX 3 '', TX '' ' And a bridge 143 connecting the electrode unit and the second driving electrode unit.

To be more specific, each of the driving electrodes includes a first driving electrode portion TX ', a second driving electrode portion TX' ', and a bridge 143. 7A shows a first driving electrode unit TX3 'forming an example of the first driving electrode unit TX' as a third driving electrode TX3, As an example of the electrode portion TX '', a second driving electrode portion TX3 '' for forming the third driving electrode TX3 is shown.

The third receiving electrode units RX3 '' 'and RX' '' are formed to overlap with the bridge 143 and intersect the first driving electrode unit and the second driving electrode unit.

In each of the center intersecting regions 190, two ground patterns G may be formed. For example, a first ground pattern G1 and a second ground turn G2 are formed in the center intersecting region 190 shown in FIGS. 7A and 7B.

In this case, the two ground patterns G1 and G2 are formed in the central intersecting region 190 to face each other with the receiving electrode RX crossing the driving electrode TX therebetween . For example, in the center intersecting region 190 shown in FIG. 7A, the third receiving electrode unit RX3 '' 'is connected to a first driving electrode unit (not shown) forming the driving electrode TX3 The first ground pattern G1 and the second ground pattern G3 are formed across the third receiving electrode unit RX3 '' 'across the second driving electrode unit TX3' and the second driving electrode unit TX3 ' (G2) are formed facing each other.

The ground pattern G is electrically insulated from the driving electrodes and the receiving electrodes. However, the ground pattern G is electrically connected to other adjacent ground patterns.

For example, as shown in FIG. 7 (b), the first ground pattern G1 and the second ground pattern G2 may be formed by the first driving electrode portion forming the driving electrode, 2 driving electrode portion. The first ground pattern G1 and the second ground pattern G2 are insulated from the first receiving electrode portion and the second receiving electrode portion forming the receiving electrode.

However, the dummy pattern D is connected to another adjacent ground pattern G as shown in FIG. 6, and is connected to the ground through the ground pad GP.

The ground pattern G is formed so as to overlap the driving electrodes and the spaces P spaced apart from each other by a predetermined distance.

7B, the first ground pattern G1 is formed on the first side surface and the second side surface, which are bounded by the receiving electrode connection portion RX '' ' And the second ground pattern G2 is formed so as to overlap the second driving electrode portion on the second side surface.

7A, the second ground pattern G2 includes a third ground pattern G2, a third ground pattern G3, and a third ground pattern G3. A third space ground pattern 240 formed so as to overlap the space, and a fourth space where the second receiving electrode portion RX3 " and the second driving electrode portion TX3 " are spaced apart from each other The third space ground pattern 240 and the fourth space ground pattern 260 are formed so as to overlap the fourth space ground pattern 260 and the second driving electrode portion TX3 ' And a second connection ground pattern (250). In this case, the third space ground pattern 240 and the fourth space ground pattern 260 are connected to another adjacent ground pattern through the pattern connecting portion 270.

7 (a), the first ground pattern G1 includes a first ground electrode pattern RX3 'and a first driving electrode pad TX3' that are spaced apart from each other. A first space ground pattern formed so as to overlap with one space P and a second space where the second receiving electrode portion RX3 '' and the first driving electrode portion TX3 'are spaced apart from each other And a first connection ground pattern formed to overlap the first space ground pattern and the first driving electrode part TX3 'and connecting the first space ground pattern and the second space ground pattern. In this case, the first space ground pattern and the second space ground pattern are connected to other ground patterns adjacent to each other through the pattern connecting portion.

The principle of reducing the capacitance of the center portion crossing region 190 will be briefly described as follows.

Generally, the capacitance is formed by an insulator formed between the conductors.

For example, in FIG. 7B, when the touch panel without the ground pattern G2 is referred to as a conventional touch panel, in the conventional touch panel, the second driving electrode portion TX ' And the bridge 143 corresponds to the sum of the capacitance of the insulating film 150 and the capacitance of the substrate 110 and the air Z. [ In this case, when the capacitance of the insulating film 150 is referred to as a first capacitance C1, the capacitance of the substrate 110 is referred to as a second capacitance C 2, and the capacitance of the air Z is referred to as a third capacitance C 3 , The capacitances of the second driving electrode unit TX '' and the bridge 143 are 1 / (1 / C1 + 1 / C2 + 1 / C3).

However, in the touch panel according to the second embodiment of the present invention in which the second ground pattern G2 is formed on the same layer as the bridge 143 as shown in FIG. 7 (b) The capacitance between the second driving electrode portion TX '' and the bridge 143 is determined by the capacitance A1 (a) between the second driving electrode portion TX '' and the second ground pattern G2, And a capacitance A1 (b) between the second ground pattern G2 and the bridge 143. [ That is, the capacitance between the second driving electrode portion TX '' and the bridge 143 in the touch panel according to the second embodiment of the present invention is 1 / (1 / A1 (a) + 1 / A1 (b)).

In this case, the capacitance (= 1 / (1 / (1 / (C1 / 1)) in the touch panel according to the second embodiment of the present invention is larger than the capacitance / A1 (a) + 1 / A1 (b)) becomes smaller.

Accordingly, in the touch panel according to the second embodiment of the present invention, the capacitance in the center portion crossing region 180 is reduced, so that the touch sensitivity in the center portion crossing region 190 can be reduced, Accordingly, the touch sensitivity in the center portion crossing region 190 and the touch sensitivity in the edge portion crossing region 180 can be formed at a similar level.

The sectional structure and manufacturing method of the touch panel 130 according to the second embodiment of the present invention are different from the sectional structure and manufacturing method of the touch panel 130 described with reference to FIG. The patterns D are connected to each other and connected to the ground pad GP. Therefore, a detailed description thereof will be omitted.

The contents of the present invention are summarized as follows.

The first embodiment of the present invention has the following features.

The first embodiment of the present invention compensates for the capacitance characteristics of the edge portion in realizing the narrow bezel touch.

In recent years, it has become a trend to reduce the size of the bezel in order to make the screen larger, while maintaining the size of the display device. However, there is a limit in the process of reducing the bezel in the structure currently applied to the touch panel, and the touch sensitivity characteristic of the center portion and the edge portion is decreased due to the structural problem.

Generally, when a Narrow bezel is applied, the capacitance between the driving electrode and the receiving electrode may be different because the electrode structure between the center portion and the edge portion is different.

The first embodiment of the present invention is intended to form the capacitance of the edge portion at a level equivalent to the capacitance of the center portion.

In the first embodiment of the present invention, a dummy pattern is formed under the space of the edge portion. According to the first embodiment of the present invention, the capacitance between the driving electrode and the receiving electrode in the central portion has a level similar to the capacitance between the driving electrode and the receiving electrode in the edge portion. In this case, the influence on the capacitance at the center portion and the edge portion is reduced, and the touch sensitivity can be similarly formed.

In more detail, in the first embodiment of the present invention, the dummy pattern is designed in the space, and in particular, the gap between the bridge and the dummy pattern is adjusted so that the capacitance between the driving electrode and the receiving electrode is reduced, And a capacitance similar to the capacitance between the receiving electrode and the receiving electrode. Further, according to the first embodiment of the present invention, since the dummy pattern is formed under the insulating film, the visibility of the space can be improved.

That is, according to the first embodiment of the present invention, the capacitances at the center portion and the edge portion can be formed similarly. Further, according to the first embodiment of the present invention, by adjusting the distance between the bridge and the dummy pattern, the space distance, and the width of the dummy pattern, the capacitance of the edge portion can be adjusted and the optical characteristics can be improved.

The second embodiment of the present invention has the following features.

In the second embodiment of the present invention, the noise at the center portion is reduced, so that the capacitance at the center portion can be formed at a level similar to the capacitance at the edge portion.

To this end, the ground pattern is added to the center portion, so that the capacitance between the driving electrode and the receiving electrode can be reduced.

According to the second embodiment of the present invention, since the ground pattern is designed in the central space, the capacitance between the driving electrode and the receiving electrode at the center can be formed at a level similar to the capacitance between the driving electrode and the receiving electrode at the edge have.

In the second embodiment of the present invention, the RC (resistance and capacitance) at the center portion is reduced by the design of the ground pattern, whereby the touch performance can be improved. It is advantageous for touch performance, and the freedom of edge design can be increased.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: panel 130: touch panel
200: driver 300: touch IC
E: edge portion C: center portion
D: Dummy pattern G: Ground pattern

Claims (10)

Board;
A plurality of driving electrodes formed on the substrate and receiving drive pulses;
A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And
Wherein the driving electrode and the reception electrode are formed in each of the edge intersection regions formed at the edge portion of the substrate among the intersection regions where the driving electrodes and the reception electrodes cross each other, Wherein the dummy patterns include a plurality of dummy patterns. The method according to claim 1,
The two dummy patterns,
Wherein the touch panel is formed to face each other with the receiving electrode crossing the driving electrode in the edge crossing area. The method according to claim 1,
Wherein the dummy pattern is electrically insulated from the driving electrodes, the receiving electrodes, and other adjacent dummy patterns. The method according to claim 1,
In the dummy pattern,
Wherein the driving electrode and the receiving electrode are formed to overlap with spaces spaced apart from each other by a predetermined distance and the driving electrode. The method according to claim 1,
The receiving electrode forming the edge portion crossing region includes a first receiving electrode portion, a second receiving electrode portion, and a third receiving electrode portion connecting the first receiving electrode portion and the second receiving electrode portion,
The driving electrode forming the edge portion crossing region includes a first driving electrode portion, a second driving electrode portion, and a bridge connecting the first driving electrode portion and the second driving electrode portion,
Wherein the third receiving electrode portion is formed to overlap with the bridge and intersects the first driving electrode portion and the second driving electrode portion,
The first dummy pattern is formed to overlap with the first driving electrode portion on the first side of the first side surface and the second side surface with the receiving electrode connection portion as a boundary,
Wherein the first dummy pattern is formed so as to overlap with the second driving electrode portion on the second side. 6. The method of claim 5,
The first dummy pattern may include:
A first space dummy pattern formed on the first receiving electrode portion and the first driving electrode portion so as to overlap the first space;
A second space dummy pattern formed to overlap the second reception electrode portion and the second space spaced apart from the first driving electrode portion; And
And a first connection dummy pattern formed to overlap with the first driving electrode portion and connecting the first space dummy pattern and the second space dummy pattern,
The second dummy pattern may include:
A third space dummy pattern formed to overlap with a third space where the first receiving electrode portion and the second driving electrode portion are spaced apart;
A fourth space dummy pattern formed to overlap with a fourth space where the second receiving electrode portion and the second driving electrode portion are spaced apart; And
And a second connection dummy pattern formed to overlap the second driving electrode portion and connecting the third space dummy pattern and the fourth space dummy pattern. panel; And
And a touch panel attached to the panel,
The touch panel includes:
A plurality of driving electrodes formed on the substrate and receiving drive pulses;
A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And
Wherein the driving electrode and the reception electrode are formed in each of the edge intersection regions formed at the edge portion of the substrate among the intersection regions where the driving electrodes and the reception electrodes cross each other, Wherein the dummy patterns include dummy patterns. Board;
A plurality of driving electrodes formed on the substrate and receiving drive pulses;
A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And
A ground electrode formed on each of central intersecting regions formed at the central portion of the substrate and formed of a metal material to reduce a capacitance of the center intersecting region among the intersecting regions where the driving electrodes and the receiving electrodes intersect, A touch panel comprising patterns. 9. The method of claim 8,
And the ground patterns are connected to the ground. panel; And
And a touch panel attached to the panel,
The touch panel includes:
Board;
A plurality of driving electrodes formed on the substrate and receiving drive pulses;
A plurality of receiving electrodes formed on the substrate to cross the driving electrodes; And
A ground electrode formed on each of central intersecting regions formed at the central portion of the substrate and formed of a metal material to reduce a capacitance of the center intersecting region among the intersecting regions where the driving electrodes and the receiving electrodes intersect, A display device comprising patterns.

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