KR20160021686A - Touch detecting apparatus - Google Patents

Abstract

According to one embodiment of the present invention, provided is a touch detection device. The touch detection device includes: a plurality of sensor pads made of conducting material; a sensor node in which one portion of at least three sensor pads is disposed; a plurality of signal wires connected to the sensor pads individually; and a touch detection unit detecting the occurrence of a touch based on an output signal from the signal wires. Two sensor pads among the sensor pads included in the sensor node have a shared area. Therefore, when touches occur at different positions even within one sensor node, the different positions can be determined as touch occurrence positions.

Description

TOUCH DETECTING APPARATUS

The present invention relates to a touch detection apparatus, and more particularly, to a touch detection apparatus capable of detecting an accurate point of occurrence of a touch even if the touch is generated by a touch generating unit having a small cross-sectional area.

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 a perspective view showing a configuration of a conventional touch detection apparatus.

The touch detection device shown in Fig. 1 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.

The signal wiring 23 connects the sensor pad 22 and the driving device 30, and this signal wiring 23 can be patterned with ITO.

Fig. 2 is a plan view showing a configuration of the touch detection device shown in Fig. 1. Fig.

2, a sensor pad 22 is arranged in a plurality of rows and columns in a touch panel 20, and the driving device 30 drives the touch panel 20 based on an output signal from the sensor pads 22, . In FIG. 2, the signal lines 23 for transmitting output signals from the respective sensor pads 22 to the driving device 30 are omitted.

Since the touch generating means forms the touch capacitance in relation to the sensor pad 22, the output signal from the sensor pad 22 in which the touch occurs is different from the case where no touch occurs. The capacitance of the touch capacitance depends on the area of touching the sensor pad 22. The larger the area of the touch capacitance, the larger the capacitance of the touch capacitance. Therefore, the difference in magnitude of the signal output from the sensor pad 22 before and after the touch .

However, since the sensor pads 22 are arranged in a row and a column in a rectangular shape having a predetermined size, the touch generating area May be formed to cover the plurality of sensor pads 22.

For example, assuming that the touch region T formed by the touch generating means covers four sensor pads 22_1, 22_2, 22_3, and 22_4 as shown in FIG. 2, four sensor pads 22_1, 22_2, 22_3, and 22_4) are different from the case where the output signal from each of them is not touch generated.

Assuming that the area of contact with the touch generating means is the largest at the second sensor pad 22_2, the sensor pad having the most difference between the output signals before and after the touch will be the second sensor pad 22_2. Accordingly, the driving device 30 determines that the touch has occurred in the second sensor pad 22_2.

Thus, in the conventional touch detection method, it is determined based on the contact area of the touch generation means that the touch occurred on the sensor pad.

However, if the cross-sectional area of the touch generating means is smaller than the area of the sensor pad 22, the following problems may occur. .

If a touch occurs in the area of the fifth sensor pad 22_5 by the touch generating means, touch may occur at the upper left of the area of the fifth sensor pad 22_5 (Ta) (Tb), and a touch may occur on the right edge (Tc). However, in all three cases, since the capacitances formed between the touch generating means and the sensor pads 22_5 are the same, the driving device 30 judges that a touch is generated in the area of the fifth sensor pad 22_5 in any case I can not help it.

In this case, although touch points are different in all three cases, it is determined that a touch is generated in the central portion of the fifth sensor pad 22_5, which is the center of gravity.

Therefore, there is a need for a technique for improving the accuracy of the touch detection in accordance with the trend of new developments of the touch generation tool with a small finger cross sectional area.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to make it possible to determine different points as touch occurrence points when touches occur at different points within one sensor node.

Another object of the present invention is to precisely detect touch points of a touch through a touch generating means having a small cross-sectional area.

According to an embodiment of the present invention, a plurality of sensor pads are formed of a conductive material. A sensor node in which at least a portion of the at least three sensor pads are disposed; A plurality of signal lines connected to each of the plurality of sensor pads; And a touch detection unit that detects a touch occurrence based on an output signal from the plurality of signal wirings, wherein two sensor pads of the sensor pads included in the sensor node have a shared area .

The sensor node includes a first sensor pad, a second sensor pad, and a third sensor pad. The sensor node includes a single region in which the first, second, and third sensor pads are disposed, And a shared area in which two sensor pads of the sensor pads are disposed together.

The shared area may be implemented for every combination in which two of the three sensor pads are selected.

The single region may include a plurality of slits.

The plurality of slits may extend in a row direction in which the sensor nodes are arranged, and may be repeatedly bent at a predetermined angle with respect to the column direction.

In the shared area, the two sensor pads may be arranged alternately with each other with a comb pattern.

The comb tooth pattern may extend in the column direction of the sensor node, and may be repeatedly bent at a predetermined angle with respect to the column direction.

According to the embodiment of the present invention, since a part of different sensor pads are arranged in one sensor node, it is possible to accurately detect different touch points in one sensor node.

Further, according to the embodiment of the present invention, the touch generation point can be accurately detected even in one sensor node, so that the touch generation means having a narrow cross-sectional area can be used.

1 is an exploded perspective view showing a configuration of a conventional touch detection apparatus.
2 is a plan view showing a configuration of the touch detection device of Fig.
3 is a diagram showing a configuration of a touch detection apparatus according to an embodiment of the present invention.
4 is a diagram for explaining a touch detection method according to an embodiment of the present invention.
5 is a view showing an arrangement of sensor pads in a touch detection apparatus according to an embodiment of the present invention.
6 is a diagram for explaining a touch detection method according to an embodiment of the present invention.
7 is a view showing an arrangement of sensor pads in a touch detection device according to another embodiment of the present invention.
8 is a view showing an arrangement of sensor pads in a touch detection device according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. 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.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

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

3 is a diagram for explaining a configuration of a touch detection apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the touch sensing apparatus according to the embodiment includes a touch panel 100 and a driver 200.

The touch panel 100 includes a plurality of sensor nodes 110 arranged in a plurality of rows and columns. Each sensor node 110 may have a regular shape of a circle, a square, or another polygon, and a plurality of sensor nodes 110 may form a single row.

Each of the sensor nodes 110 is divided into a plurality of sub regions a, b, and c. In each of the sub regions a, b, and c, different sensor pads 111_1, 111_2, and 111_3 At least a part of which is disposed. Preferably, at least a portion of at least three sensor pads 111_1, 111_2, and 111_3 are disposed in one sensor node 110. [ For example, as shown in FIG. 3, when each sensor node 110 is implemented in a rectangular shape and the first sensor node 110_1 is divided into three sub-areas a, b, and c, A part of the first sensor pad 111_1 is disposed in the sub region a and a part of the second sensor pad 111_2 is disposed in the second sub region b, And a part of the sensor pad 111_3 is disposed. The remaining part of the first sensor pad 111_1 is disposed in the second sensor node 110_2 and the third sensor node 110_3 adjacent to the first sensor node 110_1 in the column direction. Likewise, a part of the second sensor pad 111_2 is also arranged in the subarea b of the first sensor node 110_1, while the remaining part is disposed over the second sensor node 110_2 and another sensor node adjacent thereto do. The same applies to the third sensor pad 111_3.

Accordingly, in the embodiment shown in FIG. 3, one sensor pad 111_1, 111_2, and 111_3 are disposed over three sensor nodes, respectively. This is only one embodiment, and it is enough if one sensor pad 111_1, 111_2, 111_3 is disposed over two or more sensor nodes.

For example, the number of sensor pads 111_1, 111_2, and 111_3 disposed in one sensor node 110 and the number of sensor nodes 110 spanning one sensor pads 111_1, 111_2, and 111_3 are the same . For example, the number of the sensor pads 111_1, 111_2, and 111_3 disposed in the first sensor node 110_1 is three and the number of the sensor nodes 110 in which the respective sensor pads 111_1, 111_2, There may also be three. Accordingly, the number of the sensor nodes 110 forming one row becomes equal to the number of the sensor pads 111_1, 111_2, and 111_3.

One of the plurality of sensor pads 111_1, 111_2 and 111_3 disposed in each sensor node 110 is connected to the driving unit 200 through the signal wiring 120. [

Accordingly, each sensor node 110 is connected to the driving unit 200 through one signal line 120, and the number of the sensor nodes 110 forming one row, The number of the pads 111_1, 111_2, and 111_3, and the number of the signal lines 120 connecting one row and the driver 220 may all be the same.

However, this example is only one example, and the number of the sensor pads 111_1, 111_2, and 111_3 constituting one row may be changed depending on the size and shape of the sensor pads 111_1, 111_2, and 111_3, May not coincide with the number of sensor nodes 110. In addition, the number of the signal wirings 120 may not coincide with each other.

According to the structure of the touch detection apparatus shown in FIG. 3, when a touch is generated at different positions within one sensor node 110, the touch detection is recognized as a touch at a different point depending on each position, . This will be described later in detail.

The driving unit 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 be implemented by one or more integrated circuit (IC) chips. 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 connected to the signal line 120, a plurality of capacitors and a plurality of impedance elements and may include a multiplexer for selecting the sensor pads 111_1, 111_2, and 111_3 for touch detection . According to one embodiment, the touch detection unit 210 selects specific sensor pads 111_1, 111_2, and 111_3 through the multiplexer and detects whether or not the touch is selected through signals output from the sensor pads 111_1, 111_2, and 111_3 .

The sensor pads 111_1, 111_2, and 111_3 form a touch capacitance in relation to the touch generating means. Since the signals output from the sensor pads 111_1, 111_2, and 111_3 are different according to the touch capacitance, It is possible to detect whether or not the sensor pads 111_1, 111_2, and 111_3 are touched through signal detection. The touch detection unit 210 receives a signal from the control unit 240, drives circuits for touch detection, and outputs a voltage corresponding to the touch detection result. The touch detection unit 210 may include an amplifier and an analog-to-digital converter, and may convert, amplify or digitize output signal differences of the sensor pads 111_1, 111_2, and 111_3 and store them 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 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.

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.

FIG. 4 is a diagram for explaining a touch detection method in the sensor node 110 of FIG. In FIG. 4, the centers of gravity of the first through third sensor pads 111_1, 111_2, and 111_3 exist in the first through third sensor nodes 110_1, 110_2, and 110_3, respectively.

Referring to FIG. 4, it is assumed that a touch occurs in various areas in the first sensor node 110_1.

First, when a touch occurs in the first region T1, which is the boundary between the first sensor pad 110_1 and the second sensor pad 110_2, the touch generating means and the first sensor pad 111_1, Touch capacitances are formed in all the sensor pads 111_2. As described above, each of the sensor pads 111_1, 111_2, and 111_3 is connected to the driving unit 200 through the signal line 120. When the first sensor pad 111_1 is touched by generation of a touch to the first region T1, And the second sensor pad 111_2. However, since the area covered by the first touch area T1 is larger in the first sensor pad 111_1, the difference in the magnitude of the output signal before and after the touch is generated is larger in the first sensor pad 111_1. The difference in output signal magnitude will be proportional to the area of contact between the touch generating means and the sensor pad. Accordingly, the driving unit 200 is a boundary point between the first sensor pad 111_1 and the second sensor pad 111_2 in the first sensor node 110_1 and is located at a position relatively closer to the first sensor pad 111_1 It is possible to judge that a touch has occurred. The distance between the point at which the touch generating position is determined and the boundary point between the first sensor pad 111_1 and the second sensor pad 111_2 is determined by the area of the second sensor pad 111_2 Lt; RTI ID = 0.0 > area). ≪ / RTI > That is, the driver 200 does not determine that a touch occurs in the center of gravity T1 'of the first sensor pad 111_1, but also finds an accurate touch point in the first sensor node 110_1 .

Next, it is assumed that the touch generation region is a second touch region T2 covering a part of the first sensor pad 111_1, the second sensor pad 111_2, and the third sensor pad 111_3. In this case, since the second sensor area 111_2 has the largest area occupied by the second touch area T2, the touch occurrence position finally determined is the first sensor pad 111_1, the second sensor pad 111_2, And the third sensor pad 111_3 are in contact with each other, and may be a point deviated partly toward the second sensor pad 111_2.

Finally, it is assumed that the touch generation region is a third touch region T3 covering the first sensor pad 111_1 and the third sensor pad 111_3. In this case, the area occupied by the third touch area T3 is wider at the third sensor pad 111_3 than at the first sensor pad 111_1, 111_1 and the third sensor pad 111_3 and may be a point deviated to some extent toward the third sensor pad 111_3.

According to the embodiment of the present invention, even if a touch occurs in one sensor node 110_1, it is finally determined that a touch occurs at different points depending on whether a touch occurs at a certain position. That is, one sensor pads 111_1, 111_2, and 111_3 are disposed over the sensor nodes 110_1, 110_2, and 110_3, and a plurality of sensor pads 111_1, 111_2, 111_3 are disposed in the sensor node 110_1. Therefore, even in one sensor node 110_1, a touch at different points is recognized according to which area the touch is generated.

In other words, in the conventional touch detection apparatus, since only one sensor pad is disposed in one sensor node, the center point of the corresponding sensor node is recognized as a touch generation point regardless of any area in the sensor node. According to an embodiment of the present invention, even in one sensor node, a different point is recognized as a point of occurrence of a touch according to a point at which a touch occurs, and the recognized point of touch can be as close as possible to an actual point of occurrence of a touch.

5 is a view showing an arrangement of sensor pads in a touch detection apparatus according to an embodiment of the present invention.

Referring to FIG. 5, at least some of the three sensor pads 111_1, 111_2, and 111_3 are disposed in one sensor node 110_1. D, e, g, and a total of four regions (a, b, c, d, e, f, g, h, i) A portion of the first sensor pad 111_1 is disposed in the region, a portion of the second sensor pad 111_2 is disposed in the region c, and a portion of the third sensor pad 111_3 is disposed in the i region. A portion of the first sensor pad 111_1 and a portion of the second sensor pad 111_2 are disposed together in the region b and a portion of the first sensor pad 111_1 and the third sensor pad 111_3 is disposed in the region h . A portion of the second sensor pad 111_2 and the third sensor pad 111_3 are disposed in the f region.

In summary, a portion of three sensor pads 111_1, 111_2, and 111_3 is disposed in one sensor node 110_1, and one sensor node 110_1 is divided into a plurality of regions in which the shape of the sensor node is reduced And in some of the three sensor pads 111_1, some of the two sensor pads may be disposed together.

The two areas (b, f, h) where two sensor pads are disposed together may be referred to as a shared area. In this shared area (b, f, h) So that it can be alternately arranged. Conversely, the first through third sensor pads 111_1, 111_2, and 111_3 are individually disposed in some areas (a, c, d, e, g, g, i) can be referred to as a single area.

All combinations of two of the three sensor pads 111_1, 111_2, and 111_3 in which at least a portion is disposed in one sensor node 110_1 may be disposed in the shared areas b, f, and h. In other words, the shared areas b, f, and h can be implemented for all combinations in which two of the three sensor pads 111_1, 111_2, and 111_3 are selected.

the first sensor pad 111_1 and the second sensor pad 111_2 are formed in a comb pattern in the corresponding area and the second sensor pad 111_1 and the second sensor pad 111_2 are formed in a comb tooth pattern between the comb tooth patterns of the first sensor pad 111_1. A comb pattern of the sensor pad 111_2 is disposed.

5, the sensor nodes 110_1 are divided into nine regions, that is, 3x3 regions (a, b, c, d, e, f, the first sensor pad 111_1 is arranged in the area (a, d, g) of one row and the area (e) of the second row and the second column, And the second sensor pad 111_2 and the third sensor pad 111_3 are disposed in the area (i) of the third row. The first sensor pad 111_1 and the second sensor pad 111_2 are disposed together in the area b of the first row and the second column and the first sensor pad 111_1 and the third sensor pad 111_1 are disposed in the area h of the third row and the second column. The sensor pad 111_3 is arranged together and the second sensor pad 111_2 and the third sensor pad 111_3 are arranged together in the area f in the second row and the third column. Each of the sensor pads 111_1, 111_2, and 111_3 must have the same shape for ease of manufacture when the touch panel is implemented. Accordingly, the second sensor node 110_2 adjacent to the first sensor node 110_1 in the column direction, And the third sensor node 110_3 are arranged in a symmetrical manner with respect to the arrangement in the first sensor node 110_1. Specifically, if the second sensor node 110_2 is divided into 3 × 3 regions as in the first sensor node 110_1, the second sensor pad 111_2 is disposed in the third column region and the second row and second column regions And the first sensor pad 111_1 is disposed in the third row and the first column. In addition, although not shown, another sensor pad will be arranged in the first row and the first column. On the other hand, the second sensor pad 111_2 and the first sensor pad 111_1 may be disposed together in the third row and the second column. Similarly, if the third sensor node 110_3 is divided into 3 × 3 regions as in the first sensor node 110_1, the third sensor pad 111_3 is disposed in the third column region and the second row and second column regions , And the first sensor pad 111_1 is disposed in the first row and the first column. Further, although not shown, another sensor pad will be disposed in the third row and the first column. On the other hand, the third sensor pad 111_2 and the first sensor pad 111_1 may be disposed together in the area of the first row and the second column. According to the embodiment shown in FIG. 5, the arrangement of the sensor pads may be changed in a symmetrical manner with each sensor node being alternately turned. That is, in the embodiment shown in FIG. 5, the arrangement pattern of the sensor pads of the odd-numbered sensor nodes in one column is the same pattern, and the arrangement pattern of the sensor pads of the even-numbered sensor nodes is also the same pattern.

The embodiment shown in FIG. 5 is only one embodiment. In the embodiment of the present invention, a part of the plurality of sensor pads 111_1, 111_2, and 111_3 is disposed in one sensor node 110_1, 110_2, and 110_3 It suffices. When the sensor nodes 110_1, 110_2, and 110_3 are divided into a plurality of regions that are the same as the sensor nodes 110_1, 110_2, and 110_3 and are reduced in size, (111_1, 111_2, 111_3) are disposed together.

FIG. 6 is a diagram for explaining a touch detection method of the touch detection apparatus shown in FIG. 5 in brief.

If only one sensor pad is disposed in one sensor node 110_1 as in the related art, it is determined that a touch occurs at the center of the sensor node 110_1 when a touch occurs at a point 'T1' or 'T2' . This is because the touch generation is performed on only one sensor pad, and the center of gravity of the sensor pad is the same as the center of the sensor node 110_1.

However, according to the embodiment of the present invention, when a touch occurs at the 'T1' point, the area of the boundary between the first sensor pad 111_1 and the second sensor pad 111_2 in the area within the first sensor node 110_1 When a touch occurs at a point 'T2', it is determined that a touch occurs in the region of the boundary between the first sensor pad 111_1 and the third sensor pad 111_3 in the area within the first sensor node 110_1 It can be determined that a touch has occurred. That is, according to the embodiment of the present invention, it is possible to accurately determine the point of occurrence of the touch according to the position of the touch occurrence even in the area within one sensor node 110_1.

7 is a view showing an arrangement of sensor pads in a touch detection device according to another embodiment of the present invention.

7, at least some of the three sensor pads 111_1, 111_2, and 111_3 are disposed in one sensor node 110_1 in the same manner as described with reference to FIG. When the sensor node 110_1 is divided into a 3 × 3 shape in a reduced shape of the sensor node 110_1, the first sensor pad 111_1 is provided in four regions a, d, e, and g, A portion of the second sensor pad 111_2 is disposed in the c region, and a portion of the third sensor pad 111_3 is disposed in the i region. A portion of the first sensor pad 111_1 and a portion of the second sensor pad 111_2 are disposed together in the region b and a portion of the first sensor pad 111_1 and the third sensor pad 111_3 is disposed in the region h . A portion of the second sensor pad 111_2 and the third sensor pad 111_3 are disposed in the f region.

The embodiment of FIG. 7 is different from that of FIG. 5 in the form of sensor pads in shared areas (b, f, h) where different sensor pads are arranged together. 5, two sensor pads are formed in comb tooth patterns in the corresponding shared areas b, f, and h, and are arranged alternately with each other. However, in FIG. 7, each comb tooth pattern is formed as a saw tooth pattern .

First, referring to the area (b) of the first row and the second column of the area in the sensor node 110_1, the first sensor pad 111_1 and the second sensor pad 111_2 are formed in a comb pattern, Pattern. Specifically, each comb pattern can be extended by repeating bending at a predetermined angle (0 DEG < < 90 DEG) with respect to the column direction of the sensor node 110_1. The comb tooth patterns of the first sensor pads 111_1 are formed in the saw tooth pattern so that the comb tooth patterns of the second sensor pads 111_2 interposed between the comb tooth patterns of the first sensor pads 111_1 are also matched with the comb tooth patterns of the second sensor pads 111_1, Pattern is preferably formed.

The touch panel may be stacked on or embedded in the display device, and the display device may include a backlight, a polarizing plate, a substrate, a liquid crystal layer, a pixel layer, (Hereinafter referred to as R, G, and B), and colors can be implemented in a liquid crystal display device in units of red, green, and blue (hereinafter, referred to as R, G, and B) pixels.

The pixel layer includes a plurality of pixels including R, G, and B subpixels. When the comb tooth patterns of the sensor pads 111_1, 111_2, and 111_3 disposed on the upper touch panel are formed in a straight line shape, The area overlapping with the R, G, and B subpixels varies depending on each region. As a result, each of the pixels exhibits a difference in color temperature caused by each pixel according to the light transmittance of the signal wiring 120 superimposed on each pixel, and a color difference occurs. According to the embodiment shown in FIG. 7, As the comb pattern of the R, G, and B sub pixels and the comb tooth patterns of the sensor pads 111_1, 111_2, and 111_3 repeatedly bend at certain angles, the comb pattern and the R, G, and B sub pixels overlap each other There is no big difference. Accordingly, the color temperature difference and the color difference according to the region can be minimized.

8 is a view showing an arrangement of sensor pads in a touch detection device according to another embodiment of the present invention.

Referring to FIG. 8, the sensor pads 111_1, 111_2, and 111_3 are disposed in the sensor nodes 110_1, 110_2, and 110_3 in the same pattern as in FIG.

The difference from FIG. 7 is that each of the sensor pads 111_1, 111_2, and 111_3 includes a plurality of slits L.

C, d, e, g, and g in which the sensor pads 111_1, 111_2, and 111_3 are disposed in the sensor node 110_1, respectively, as described above, i, and slits L may be formed in the sensor pads 111_1, 111_2, and 111_3 disposed in such a single region.

In FIG. 8, the slit L is formed in the same shape as the sensor pad pattern, that is, the saw blade pattern, in the shared areas (b, f, h). That is, a pattern in which the slit L is extended in the column direction and repeatedly bending at a predetermined angle (0 DEG < < 90 DEG) with respect to the column direction is exemplified.

The width of the slit L is preferably equal to the spacing between the sensor pads in the shared areas b, f, h.

Since two sensor pads 111_1, 111_2, and 111_3 are alternately arranged in the shared areas b, f, and h, a predetermined gap is formed between the sensor pads 111_1, 111_2, and 111_3. The slits L are formed in the single regions a, c, d, e, g and i, and the width of the slits L is set to two sensor pads 111_1 and 111_2 , And the shared areas b, f, and h have the same pattern, if they are the same as the inter-cell spacing a, c, d, e, g and i.

Accordingly, since the light transmission characteristics between the single areas a, c, d, e, g, and i and the shared areas b, f, h are minimized, the visibility when stacked on the display device can be improved have.

(A, c, d, e, g, i) are arranged alternately in the comb shape in the shared areas (b, f, h) It is preferable that the slits L in the form of a straight line are also formed on the sensor pads 111_1, 111_2, 111_3 in the sensor pads 111_1, 111_2, 111_3.

That is, the patterns of the slits L formed in the sensor pads 111_1, 111_2, and 111_3 in the individual regions a, c, d, e, g, and i are disposed in the shared regions b, h, Is preferably the same as the extending pattern of the sensor pads 111_1, 111_2, 111_3.

Although not shown in the drawing, the signal wiring 120 connected to each of the sensor pads 111_1, 111_2, and 111_3 is also an extension of the sensor pads 111_1, 111_2, and 111_3 disposed in the shared areas b, h, It is preferable to form it in the same manner as the pattern.

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: Touch panel
110: sensor node
111: Sensor pad
120: Signal wiring
200:
210:
220: Touch information processor
230: Memory
240:

Claims (7)

A plurality of sensor pads made of a conductive material;
A sensor node in which at least a portion of the at least three sensor pads are disposed;
A plurality of signal lines connected to each of the plurality of sensor pads; And
And a touch detection section for detecting a touch occurrence based on an output signal from the plurality of signal wirings,
Wherein two sensor pads of the sensor pads included in the sensor node have a shared area. The method according to claim 1,
The sensor node includes first, second, and third sensor pads,
Wherein the sensor node includes a touch area including a single area in which the first, second, and third sensor pads are independently disposed, and a shared area in which two sensor pads of the first, second, Device. The method according to claim 1,
Wherein the shared region is implemented for every combination in which two of the three sensor pads are selected. 3. The method of claim 2,
Wherein the single region includes a plurality of slits. 5. The method of claim 4,
Wherein the plurality of slits extend in a row direction in which the sensor nodes are arranged, and repeatedly bend at a predetermined angle with respect to the column direction. The method according to claim 1,
Wherein in the shared area, the two sensor pads are arranged alternately with each other with a comb pattern. The method according to claim 6,
Wherein the comb tooth pattern extends in a row direction of the sensor node and repeatedly bends at a predetermined angle with respect to the column direction.

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