KR20220112551A - Touch sensor and touch input device thereof - Google Patents

Abstract

An embodiment of the present invention relates to a touch sensor and a touch input device comprising the same. The touch sensor according to the embodiment of the present invention comprises: a driving electrode comprising a plurality of driving pattern parts arranged along a first direction, and a connection pattern electrically connecting two driving pattern parts adjacent to each other in the plurality of driving pattern parts; and a receiving electrode wherein a first receiving pattern part and a second receiving pattern part disposed with the connection pattern of the driving electrode interposed therebetween are alternately arranged along a second direction perpendicular to the first direction. Therefore, the present invention is capable of having an advantage of improving a touch sensing sensitivity.

Description

TOUCH SENSOR AND TOUCH INPUT DEVICE THEREOF

An embodiment of the present invention relates to a touch sensor and a touch input device including the same.

Various types of input devices are used to operate a computing system. For example, input devices such as buttons, keys, joysticks, and touch screens are being used. Due to the easy and convenient operation of the touch screen, the use of the touch screen is increasing when operating a computing system.

A touch sensor is a type of information input device, and may be provided and used in a display device. For example, the touch sensor may be attached to one surface of the display panel or may be manufactured and used integrally with the display panel. The user may input information by pressing or touching the touch sensor while viewing the image displayed on the screen of the display device.

When the touch sensor is implemented as a single layer or a double layer as the driving electrode and the receiving electrode, when the touch input device on which the touch sensor is mounted is touched in a state (floating state), it is normally caused by LGM (low ground mass). In some cases, a signal to be sensed disappears, or a signal to be sensed is split so that a signal appears as a touch at two or more points.

KR 10-1979891 (2019.05.13)

An embodiment of the present invention provides a touch sensor capable of improving touch sensing sensitivity and a touch input device including the same.

In addition, an embodiment of the present invention provides a touch sensor capable of improving an amount of change in active capacitance included in a signal output from a receiving electrode and reducing an amount of change in dummy capacitance when a driving signal is applied to the driving electrode and the same It provides a touch input device including.

A touch sensor according to an embodiment of the present invention includes a plurality of driving pattern parts arranged in a first direction and a connection pattern for electrically connecting two driving pattern parts adjacent to each other in the plurality of driving pattern parts, a driving electrode ; and a receiving electrode in which first receiving pattern portions and second receiving pattern portions disposed with the connection pattern of the driving electrode interposed therebetween are alternately arranged in a second direction perpendicular to the first direction.

A touch sensor according to another embodiment of the present invention includes a plurality of driving pattern parts each arranged in a first direction and a connection pattern for electrically connecting two driving pattern parts adjacent to each other in the plurality of driving pattern parts , a plurality of driving electrodes; and a first receiving pattern part disposed on each of the driving pattern parts of the odd-numbered driving electrodes among the plurality of driving electrodes, a second receiving pattern part disposed on the driving pattern part of each of the even-numbered driving electrodes, and the odd-numbered driving electrode. and a receiving electrode including a first connection pattern electrically connecting the driving electrodes and a second connection pattern electrically connecting the even-numbered driving electrodes.

A touch input device according to an embodiment of the present invention includes a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes; a driving unit for applying a driving signal to the plurality of driving electrodes of the touch sensor; a sensing unit for sensing received signals from a plurality of receiving electrodes of the touch sensor; and a control unit controlling the driving unit and the sensing unit, wherein each of the plurality of driving electrodes includes a plurality of driving pattern units arranged in a first direction and two driving pattern units adjacent to each other in the plurality of driving pattern units. a second receiving pattern portion and a second receiving pattern portion disposed with a connection pattern of the driving electrode interposed therebetween, wherein each of the plurality of receiving electrodes is perpendicular to the first direction; They are arranged alternately along the direction.

A touch input device according to another embodiment of the present invention includes a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes; a driving unit for applying a driving signal to the plurality of driving electrodes of the touch sensor; a sensing unit for sensing received signals from a plurality of receiving electrodes of the touch sensor; and a control unit for controlling the driving unit and the sensing unit, wherein the plurality of driving electrodes include a plurality of driving pattern units each arranged in a first direction and two driving pattern units adjacent to each other in the plurality of driving pattern units and a connection pattern for electrically connecting the plurality of receiving electrodes, each of a first receiving pattern portion and an even-numbered driving electrode disposed on a driving pattern portion of each of the odd-numbered driving electrodes among the plurality of driving electrodes a second reception pattern portion disposed on the driving pattern portion of , a first connection pattern electrically connecting the odd-numbered driving electrodes, and a second connection pattern electrically connecting the even-numbered driving electrodes.

When the touch sensor according to the embodiment of the present invention and the touch input device including the same are used, there is an advantage in that the touch sensing sensitivity can be improved.

In addition, when a driving signal is applied to the driving electrode, there is an advantage in that the amount of change in active capacitance included in the signal output from the receiving electrode can be improved and the amount of change in the dummy capacitance can be reduced.

1 is a schematic diagram of a touch input device including a touch sensor according to an embodiment of the present invention.
FIG. 2 is a plan view of a part of the touch sensor 10 shown in FIG. 1 .
3 is a plan view of the touch sensor 10 shown in FIG. 2 separated into two layers.
4 is a graph comparing the difference in capacitance change amount (dCm) of the conventional touch sensor and the touch sensor according to the embodiment of the present invention shown in FIG. 2 .
5 is a plan view of a portion of a touch sensor according to another embodiment of the present invention.
6 is a plan view of the touch sensor shown in FIG. 5 separated into two layers.
7 is a plan view of a portion of a touch sensor according to still another embodiment of the present invention.
8 is a plan view of the touch sensor shown in FIG. 7 separated into two layers.
9 is a plan view of a portion of a touch sensor according to still another embodiment of the present invention.
10 is a plan view of the touch sensor shown in FIG. 9 separated into two layers.
11 is a plan view of a portion of a touch sensor according to still another embodiment of the present invention.
12 is a plan view of the touch sensor shown in FIG. 11 separated into two layers.
13 is a modified example of the plurality of receiving electrodes RX0'''', RX1'''', RX2'''', ... shown in FIGS. 11 to 12 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] BRIEF DESCRIPTION OF THE DRAWINGS Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents to those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

A touch input device according to various embodiments of the present document is an electronic device, for example, a smartphone, a tablet personal computer (PC), a vehicle display device, a mobile phone, a video phone, It may include at least one of an e-book reader, a laptop personal computer, a netbook computer, a mobile medical device, a camera, or a wearable device. Here, the wearable device may be an accessory type (eg, watch, ring, bracelet, anklet, necklace, eyeglasses, contact lens, or head-mounted-device (HMD)), a textile or an integrated garment (eg, electronic garment). ), a body attachable type (eg, a skin pad or a tattoo), or a bioimplantable type (eg, an implantable circuit).

1 is a schematic diagram of a touch input device including a touch sensor according to an embodiment of the present invention.

Referring to FIG. 1 , a touch input device 1 according to an embodiment of the present invention may include a touch sensor 10 , a sensing unit 11 , a driving unit 12 , and a control unit 13 .

The driving unit 12 applies a driving signal to the touch sensor 10 under the control of the control unit 13 , and the sensing unit 11 receives the sensing signal received from the touch sensor 10 .

The driving unit 12 may sequentially supply driving signals to the plurality of driving electrodes of the touch sensor 10 .

The sensing unit 11 receives signals output from the plurality of receiving electrodes of the touch sensor 10 . Here, the signal may include information on the amount of capacitance change between the driving electrode and the receiving electrode adjacent to each other, an LGM noise signal, and a display noise signal.

The sensing unit 11 may output a subtracted signal by subtracting two signals among signals output from the plurality of receiving electrodes, and may output the subtracted signal by analog-to-digital conversion. To this end, the sensing unit 11 may include a comparator and an ADC.

The control unit 13 may detect whether a touch has been made and/or a touch position based on a digital signal output from the sensing unit 11 .

In FIG. 1 , the sensing unit 11 , the driving unit 12 , and the control unit 13 are illustrated separately for convenience of description, but the present invention is not limited thereto. For example, at least two or all of the sensing unit 11 , the driving unit 12 , and the control unit 13 may be implemented as one module, unit, or chip.

The touch input device 1 illustrated in FIG. 1 may include a display panel. In this case, the touch sensor 10 may be disposed on the display panel or within the display panel. In some cases, the touch sensor 10 may also be disposed under the display panel. For example, the touch sensor 10 may include an outer surface (eg, an upper surface of an upper substrate or a lower surface of a lower substrate) or an inner surface (eg, a lower surface or a lower surface of the upper substrate) of the upper substrate and/or lower substrate of the display panel. on the upper surface of the substrate). A touch sensor 10 may be coupled to the display panel to configure a touch screen.

The touch sensor 10 may include electrodes having a predetermined shape, and the predetermined electrodes may include a plurality of driving electrodes TX0 to TXn and a plurality of receiving electrodes RX0 to RXm.

A predetermined capacitance 14 (C00, C00, C01, C10, C11,...) are formed.

For the operation of the touch sensor 10 , the capacitance that changes according to the touch on the touch surface from the driving unit 12 and the plurality of receiving electrodes RX0 to RXm for applying a driving signal to the plurality of driving electrodes TX0 to TXn It may include a sensing unit 11 for receiving a sensing signal (or a received signal) including information on the amount of change.

In FIG. 1 , the plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm of the touch sensor 10 are illustrated as forming an orthogonal array, but the present invention is not limited thereto. The electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may have any number of dimensions and application arrangements thereof, including diagonal, concentric circles, and a three-dimensional random arrangement. Here, n and m are positive integers, and may have the same or different values, and sizes may vary according to embodiments.

The plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may be arranged to cross each other. The driving electrode TX includes a plurality of driving electrodes TX0 to TXn extending in a first axial direction, and the receiving electrode RX includes a plurality of receiving electrodes extending in a second axial direction intersecting the first axial direction ( RX0 to RXm).

The plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may be formed on the same layer (1 layer) or formed on different double layers (2 layers). The plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may have a diamond pattern shape.

FIG. 2 is a plan view of a part of the touch sensor 10 shown in FIG. 1 , and FIG. 3 is a plan view showing the touch sensor 10 shown in FIG. 2 separated into two layers.

Referring to FIG. 2 , the touch sensor 10 according to the embodiment of the present invention may be disposed in the active area 101 of the touch input device. The active area 101 may be an area to which a touch is input, or an area corresponding to a display area of a display panel included in the touch input device.

The touch sensor 10 includes a plurality of driving electrodes TX0, TX1, TX2, ... and a plurality of receiving electrodes RX0, RX1, RX2, ....

The plurality of driving electrodes TX0, TX1, TX2,... have a shape extending along the first direction, and the plurality of receiving electrodes RX0, RX1, RX2,...) have a first direction perpendicular to the first direction. It has a shape extending along two directions.

A predetermined capacitance is formed between the plurality of driving electrodes TX0, TX1, TX2, ... and the plurality of receiving electrodes RX0, RX1, RX2, ..., particularly at their intersections. This capacitance is changed when a touch input occurs at or around the corresponding point. Accordingly, by detecting the amount of change in capacitance from the signals output from the plurality of receiving electrodes RX0, RX1, RX2, ..., it is possible to detect whether a touch has been made and a touch input.

Each of the plurality of driving electrodes TX0, TX1, TX2, ... shown in FIG. 2 is, as shown in FIG. 3 , a driving pattern part 311 , a dummy pattern part 313 , and a connection pattern 315 . includes Here, the dummy pattern part 313 may be omitted as an additional configuration. When there is no dummy pattern part 313 , each of the plurality of driving electrodes TX0 , TX1 , TX2 , ... may include a driving pattern part 311 and a connection pattern 315 .

The driving pattern part 311 has a diamond shape or a rhombus shape, and has an opening O having an opened inside. The opening O has a diamond shape or a rhombus shape corresponding to the external shape of the driving pattern part 311 . Due to the opening O, the driving pattern unit 311 may have a diamond or rhombus band shape.

In the drawings, the driving pattern unit 311 is illustrated in a diamond or rhombus shape, but this is only an example, and the driving pattern unit 311 may have a polygonal or rectangular shape, for example.

A dummy pattern part 313 is disposed in the opening O of the driving pattern part 311 .

The dummy pattern part 313 has a diamond shape or a rhombus shape. The external shape of the dummy pattern part 313 has a shape corresponding to that of the driving pattern part 311 . Unlike the driving pattern part 311 , the dummy pattern part 313 does not have an opening therein and has a fully filled shape.

The driving pattern part 311 and the dummy pattern part 313 are spaced apart from each other by a predetermined distance, and the driving pattern part 311 and the dummy pattern part 313 are electrically insulated from each other.

A plurality of driving pattern units 311 in which the dummy pattern units 313 are disposed are arranged along the first direction (or horizontal direction). A connection pattern 315 disposed between the plurality of driving pattern parts 311 electrically connects the driving pattern parts 311 to each other.

The connection pattern 315 connects two adjacent driving pattern parts 311 . One end is connected to the driving pattern part 311 disposed on one side, and the other end is connected to the first pattern part disposed on the other side. The connection pattern 315 may have a bar shape, but is not limited thereto.

The plurality of driving pattern portions 311 , the plurality of dummy pattern portions 313 , and the plurality of connection patterns 315 are disposed together on the same layer (the ^2nd layer of FIG. 3 ). The plurality of driving pattern portions 311 , the plurality of dummy pattern portions 313 , and the plurality of connection patterns 315 may be formed of the same material. For example, the plurality of driving pattern portions 311 , the plurality of dummy pattern portions 313 , and the plurality of connection patterns 315 may be formed of a metal mesh. By patterning the metal mesh according to the shapes of the plurality of driving pattern portions 311 , the plurality of dummy pattern portions 313 , and the plurality of connection patterns 315 , the plurality of driving electrodes TX0, TX1, TX2, ... ) can be formed.

2 to 3, the dummy pattern part 313 is illustrated as being disposed in the opening O inside the driving pattern part 311, but each driving electrode of the present invention is not limited thereto, and the driving pattern part ( 311) and the derby pattern part 313 may have shapes other than diamond or rhombus shapes. The driving pattern part 311 and the derby pattern part 313 may be combined with each other in various shapes to constitute a driving electrode.

On the other hand, each of the plurality of receiving electrodes RX0, RX1, RX2, ... shown in FIG. 2 is, as shown in FIG. 3 , a first receiving pattern unit 331 and a second receiving pattern unit 333 . , a first connection pattern 335 and a second connection pattern 337 .

The first reception pattern part 331 and the second reception pattern part 333 are disposed between two adjacent driving pattern parts 311 in each of the driving electrodes TX0, TX1, TX2,....

The first reception pattern part 331 has an inverted triangular shape, and the second reception pattern part 333 has a triangular shape symmetrical to the first reception pattern part 331 . Here, the first and second reception pattern units 331 and 333 are not limited to triangular shapes. For example, although not shown in the drawings, each of the first and second reception pattern units 331 and 333 may have a shape surrounding the outer periphery of one driving pattern unit 331 , and the driving pattern unit 331 may have a shape. The first and second reception pattern portions surrounding the periphery of may have a rectangular or polygonal shape as a whole.

The first reception pattern unit 331 and the second reception pattern unit 333 may have the same size and shape. The first reception pattern unit 331 and the second reception pattern unit 333 may have the same cross-sectional area.

The second reception pattern unit 333 is disposed below the first reception pattern unit 331 to be spaced apart from each other by a predetermined interval. Alternatively, the second reception pattern unit 333 is disposed to be spaced apart from the first reception pattern unit 331 by a predetermined distance in the second direction perpendicular to the first direction.

A connection pattern 315 of each of the driving electrodes TX0, TX1, TX2, ... may be disposed between the first reception pattern part 331 and the second reception pattern part 333 . The first reception pattern part 331 is disposed on the connection pattern 315 , and the second reception pattern part 333 is disposed below the connection pattern 315 .

A plurality of first reception pattern units 331 and second reception pattern units 333 are alternately arranged along the second direction.

The plurality of first reception pattern portions 331 and the plurality of second reception pattern portions 333 alternately arranged along the second direction are electrically connected by the first connection pattern 335 and the second connection pattern 337 . is connected to Here, the plurality of first reception pattern portions 331 and the plurality of second reception pattern portions 333 may be electrically connected to the first connection pattern 335 and the second connection pattern 337 through conductive vias. .

The first connection pattern 335 and the second connection pattern 337 are formed on a different layer (1 ^st layer) from the layer (2 ^nd layer) in which the first reception pattern part 331 and the second reception pattern part 333 are located. can be placed. This is to prevent an electrical short circuit with the driving electrodes ^TX0 , TX1, TX2, ... located on the second layer where the second reception pattern part 333 is located. An insulating layer may be disposed between the layer ( ^2nd layer) in which the first reception pattern part 331 and the second reception pattern part 333 are located and the other layer ( ^1st layer).

When the first receiving pattern units 331 and the second receiving pattern units 333 adjacent to each other in the vertical direction with the connection pattern 315 therebetween are defined as one group, they are arranged alternately in the second direction. The plurality of first reception pattern units 331 and the plurality of second reception pattern units 333 may be defined as a plurality of groups arranged along the second direction. Under this definition, the first connection pattern 335 includes a first reception pattern part (0-0-1, 2-0-1, ...) and a second reception pattern part ( 0-0-2, 2-0-2,...) are electrically connected. The second connection pattern 337 electrically connects the first reception pattern part 331 and the second reception pattern part 333 of each of the even-numbered groups from the top.

The first connection pattern 335 is a first reception pattern portion (0-0-1, 2-0-1,...) and the second reception pattern unit (0-0-2, 2-0-2,...) are electrically connected. In addition, the first connection pattern 335 includes a second reception pattern unit 0-0-2 located between two driving pattern units 311 adjacent to each other in the left and right directions in one driving electrode TX0 located at an odd-numbered position; , electrically connecting the first receiving pattern unit 2-0-1 located between two driving pattern units adjacent to each other in the left and right direction in the other driving electrode TX3 located at an odd-numbered position after the one driving electrode TX0 do. The odd-numbered driving electrodes TX0, TX2, ... are electrically connected by the first connection pattern 335 .

The second connection pattern 337 includes a first reception pattern part 331 and a second reception pattern part located between two driving pattern parts 311 adjacent in the left and right directions at the even-numbered driving electrodes TX1, ... 333 is electrically connected. In addition, the second connection pattern 337 includes a second reception pattern unit 333 located between two driving pattern units 311 adjacent to each other in the left and right directions in one driving electrode TX1 located at an even-numbered position; In another driving electrode positioned at an even-numbered position after the driving electrode TX1, the first receiving pattern units 3-0-1 positioned between two driving pattern units adjacent to each other in the left and right directions are electrically connected. The even-numbered driving electrodes TX1 , TX3 , ... are electrically connected by the second connection pattern 337 .

A first signal is output through the first connection pattern 335 , and a second signal is output through the second connection pattern 337 . Accordingly, signals of two channels are output to each of the receiving electrodes RX0, RX1, RX2,....

Depending on the driving electrodes TX0, TX1, TX2,... can When a driving signal is applied to the odd-numbered driving electrodes TX0, TX2, ..., the first signal output through the first connection pattern 335 becomes an active channel signal, and through the second connection pattern 337 The output second signal becomes a dummy channel signal. On the other hand, when a driving signal is applied to the even-numbered driving electrodes TX1 , ... , the second signal output through the second connection pattern 337 becomes an active channel signal and through the first connection pattern 335 . The output first signal becomes a dummy channel signal.

For a specific example, in FIG. 3 , a driving signal TX signal is applied to the first driving electrode TX1 , and an object (dotted line) is an intersection point between the first driving electrode TX1 and the zero receiving electrode RX0 . It is assumed that contact with

When a driving signal is applied to the first driving electrode TX1 and an object (dotted line) is located in a partial area including the intersection of the first driving electrode TX1 and the 0 receiving electrode RX0, the first driving electrode ( The capacitance (or active capacitance) formed between the driving pattern part 311 of TX1 and the first reception pattern part 331 of the zero-th reception electrode RX0 is changed. The second signal including the capacitance change amount information is output through the second connection pattern 337 . Here, the second signal may include an LGM noise signal and a display noise signal by the display panel.

In addition, the capacitance (or dummy capacitance) formed between the driving pattern part 311 of the first driving electrode TX1 and the second reception pattern part 0-0 - 2 of the zero receiving electrode RX0 is also changed. . The first signal including the capacitance change amount information is output through the first connection pattern 335 . Here, the first signal may include an LGM noise signal and a display noise signal by the display panel.

Here, since the cross-sectional area of the first reception pattern part 331 and the second reception pattern part 0-0-2 that are in contact with the object (dotted line) is the same, almost the same or similar LGM noise signal may be input to each, and , a display noise signal by the display panel may be input in almost the same way.

The sensing unit 11 illustrated in FIG. 1 subtracts the second signal output through the first connection pattern 335 from the first signal output through the second connection pattern 337 , and thus the first reception pattern The LGM noise signal and the display noise signal input to the unit 331 and the second reception pattern unit 0-0-2 may be canceled. Although the amount of change in the active capacitance included in the second signal, which is the active channel signal, is reduced by subtraction, since the amount of change in the dummy capacitance included in the first signal is relatively small, there is no problem in detecting whether or not there is a touch and/or the touch position. .

In addition, since the first reception pattern unit 331 serves as an AC ground between the driving pattern unit 311 and the second reception pattern unit 0-0-2, the first reception pattern unit 331 is The amount of change in capacitance included in the output second signal may be improved, and the amount of change in capacitance included in the first signal output to the second reception pattern unit 0-0-2 may be reduced. In this regard, it will be described in detail with reference to FIG. 4 .

4 is a graph comparing the difference in capacitance change amount (dCm) of the conventional touch sensor and the touch sensor according to the embodiment of the present invention shown in FIG. 2 .

Referring to FIG. 4 , a conventional touch sensor is a touch sensor disclosed in (Patent Document 1), and has a structure in which a dummy electrode is disposed inside a receiving electrode as well as a driving electrode.

The graph shown in FIG. 4 shows a capacitance change value (①) included in a signal output from an arbitrary reception electrode of a conventional touch sensor according to PET thickness and a dummy reception electrode disposed inside the arbitrary reception electrode. The capacitance variation value (②) included in the output signal, the active capacitance variation value (③) included in the signal output from the arbitrary second reception pattern unit 333 of the touch sensor shown in FIG. 2 and the second reception pattern A dummy capacitance variation value (④) included in a signal output from the first reception pattern unit 331 disposed under the unit 333 is shown.

In the graph of FIG. 4 , PET has a configuration corresponding to a conventional touch sensor and a window layer positioned on the touch sensor of FIG. 2 . For example, when PET compares the ① value, ② value, ③ value, and ④ value at 400 (um), it can be seen that the ③ value of the touch sensor shown in FIG. 2 is increased more than the ① value of the conventional touch sensor. It can be seen that the value ④ of the touch sensor shown in FIG. 2 is further reduced than the value of the conventional touch sensor.

In particular, when the PET thickness (Thickness) is 400 (um), the ④ value of the touch sensor shown in FIG. 2 corresponds to approximately 20-30% of the ③ value, so even if the ④ value is subtracted from the ③ value, 70 to 80% A touch presence and a touch position can be detected through a relatively high capacitance change value of the level.

On the other hand, in the conventional touch sensor, the value of ② corresponds to 70-80% of the value of ①, so if the value of ② is subtracted from the value of ①, only 20-30% of the capacitance change value remains. Therefore, the sensing sensitivity is low and the detection accuracy is lowered.

5 is a plan view of a portion of a touch sensor according to another embodiment of the present invention, and FIG. 6 is a plan view of the touch sensor shown in FIG. 5 separated into two layers.

The touch sensor shown in FIGS. 5 to 6 has the same plurality of driving electrodes TX0, TX1, TX2, ..., but a plurality of receiving electrodes ( There is a difference in RX0', RX1', RX2',...). Therefore, hereinafter, the plurality of receiving electrodes (RX0', RX1', RX2', ...) will be described in detail, and the description of the plurality of driving electrodes (TX0, TX1, TX2, ...) will be described above. be replaced with In addition, in the plurality of receiving electrodes (RX0', RX1', RX2',...), the same part as the plurality of receiving electrodes (RX0, RX1, RX2,...) of the touch sensor shown in FIGS. 2 to 3 . The description is also replaced with the above.

The touch sensor shown in FIGS. 5 to 6 is generated between the first and second receiving pattern units and the first and second connection patterns formed in different layers, compared to the touch sensor shown in FIGS. 2 to 3 . Since the used capacitance can be reduced, there is an advantage that the RC time constant value can be reduced.

The shapes of some of the first and second reception pattern units 331-1, 333-1, 331-2, 333-2, and 331-3 are the first and second reception patterns of the touch sensor illustrated in FIGS. 2 to 3 . It is different from the shape of the pattern parts 331 and 333 .

The plurality of receiving electrodes RX0', RX1', RX2',...) includes a plurality of first receiving pattern units 331-0, 331-1, 331-2,... and a plurality of second receiving patterns. and a plurality of first reception pattern portions 331-0, 331-1, 331-2, ... and a plurality of second reception pattern portions 331-0, 333-1, 333-2, ... The reception pattern units 333-0, 333-1, 333-2, ... are alternately arranged along the second direction.

When one first reception pattern unit 331 - 0 and one second reception pattern unit 333 - 0 constitute one group, a plurality of groups may be arranged along the second direction.

One first reception pattern unit 331-1 among the plurality of first reception pattern units 331-0, 331-1, and 331-2 is to which the first reception pattern unit 331-1 belongs. and a depression pattern portion corresponding to the protrusion pattern portion 333p of the second reception pattern portion 333 - 0 of another group adjacent to the group.

In addition, one second reception pattern unit 333-1 among the plurality of second reception pattern units 333-0, 333-1, and 333-2 includes the one second reception pattern unit 333-1. and a concave pattern portion corresponding to the protruding pattern portion of the first receiving pattern portion 331 - 2 of another group adjacent to the group to which is belongs.

By the protrusion pattern part 333p of the second reception pattern part 333-0 of another group and the protrusion pattern part of the first reception pattern part 331-2 of another group, the second reception pattern part of another group The minimum distance between 333 - 0 and the first receiving pattern part 331 - 2 of another group becomes shorter than the corresponding distance in the touch sensor shown in FIG. 2 . Accordingly, it is possible to reduce the length of the first connection pattern 335 ′ connecting between the second reception pattern unit 333-0 of another group and the first reception pattern unit 331-2 of another group, and further Capacitance formed between the first and second reception pattern portions 331-1 and 333-1 overlapping the first connection pattern 335 ′ but not electrically connected may be reduced.

7 is a plan view of a portion of a touch sensor according to another embodiment of the present invention, and FIG. 8 is a plan view of the touch sensor shown in FIG. 7 separated into two layers.

The touch sensor shown in FIGS. 7 to 8 has the same plurality of driving electrodes TX0, TX1, TX2, ..., but a plurality of receiving electrodes ( There is a difference in RX0'', RX1'', RX2'',...). Therefore, hereinafter, the plurality of receiving electrodes (RX0'', RX1'', RX2'', ...) will be described in detail, and the description of the plurality of driving electrodes (TX0, TX1, TX2, ...) will be Replace with the above. In addition, the plurality of receiving electrodes (RX0, RX1, RX2, ...) of the touch sensor shown in FIGS. 2 to 3 in the plurality of receiving electrodes (RX0'', RX1'', RX2'', ...) The description of the same part as described above is also replaced with the above.

The shape and arrangement of the first and second reception pattern units 331-0, 333-0, 331-1, 333-1, 331-2, 333-2, and 331-3 are shown in FIGS. 2 to 3 . The shape and arrangement of the first and second reception pattern units 331 and 333 of the touch sensor are the same.

When one first reception pattern unit 331 - 0 and one second reception pattern unit 333 - 0 constitute one group, a plurality of groups may be arranged along the second direction.

The first connection pattern 335 ″ is a pattern for electrically connecting odd-numbered groups among a plurality of groups, and overlaps with the first and second reception pattern units 331-1 and 333-1 of the even-numbered group. It is disposed in the , not electrically connected, and has a corresponding pattern 335 - a having a shape corresponding to that of the first and second reception pattern portions 331-1 and 333-1 of the even-numbered group. In addition, the first connection pattern 335 ″ includes the first and second reception pattern portions 331-0, 333-0, 331-2, and 333-2 of odd-numbered groups in the corresponding pattern 335-a. It may include an extension pattern 335 - c extending in the lateral direction.

The second connection pattern 337' is a pattern for electrically connecting even-numbered groups among a plurality of groups, and is located at a position overlapping the first and second reception pattern units 331-2 and 333-2 of the odd-numbered group. It is disposed and not electrically connected, and has a corresponding pattern having a shape corresponding to that of the first and second receiving pattern units 331 - 2 and 333 - 2 of the odd-numbered group. In addition, the second connection pattern 337 ″ may include an extension pattern extending in the direction toward the first and second reception pattern portions 331-1, 333-1, and 331-3 of the even-numbered group in the corresponding pattern. can

The touch sensor shown in Figs. 7 to 8 overlaps the corresponding pattern 335-a and the corresponding pattern 335-a, but is not electrically connected to the touch sensor shown in Figs. Although the capacitance between the first and second reception pattern parts 331-1 and 331-1 is slightly increased, the cross-sectional area of the first connection pattern 335'' increases, so that resistance is reduced.

9 is a plan view of a portion of a touch sensor according to another embodiment of the present invention, and FIG. 10 is a plan view of the touch sensor shown in FIG. 9 separated into two layers.

The touch sensor shown in FIGS. 9 to 10 has the same plurality of driving electrodes TX0, TX1, TX2, ..., but a plurality of receiving electrodes ( There is a difference in RX0''', RX1''', RX2''',...). Therefore, in the following, the plurality of receiving electrodes RX0''', RX1''', RX2''', ...) will be described in detail, and the plurality of driving electrodes TX0, TX1, TX2, ...) The description is replaced with the above.

As shown in FIG. 10, the plurality of receiving electrodes RX0''', RX1''', RX2''', ...) has a plurality of driving electrodes TX0, TX1, TX2, ... It is arranged on a different layer (1 ^st layer) than the arranged layer (2 ^nd layer).

The plurality of receiving electrodes RX0''', RX1''', RX2''', ... are first and second receiving pattern units 331-0, 333-0, 331-1, 333-1, 331-2, 333-2, and 331-3), first connection patterns 335-1 and 335-3, and second connection patterns 337-1 and 337-3 may be included.

The shape and arrangement of the first and second reception pattern units 331-0, 333-0, 331-1, 333-1, 331-2, 333-2, and 331-3 are shown in FIGS. 2 to 3 . The shape and arrangement of the first and second reception pattern units 331 and 333 of the touch sensor are the same.

When one first reception pattern unit 331 - 0 and one second reception pattern unit 333 - 0 constitute one group, a plurality of groups may be arranged along the second direction.

The first connection patterns 335 - 1 and 335 - 3 are patterns for electrically connecting odd-numbered groups among a plurality of groups.

The first connection patterns 335 - 1 and 335 - 3 are 1-1 th electrically connecting the first reception pattern part 331 - 0 and the second reception pattern part 333 - 0 of each of the odd-numbered groups. The connection pattern 335-1, and the first 1-2 electrically connecting the second reception pattern part 333-0 of any one group of the odd-numbered group and the first reception pattern part 331-2 of the next group A connection pattern 335 - 3 may be included.

The 1-2 connection pattern 335-3 includes a first reception pattern part 331-1 and a 2-1 connection pattern 337-1 of an even-numbered group located between any one group of the odd-numbered group and the next group. ) and the second reception pattern unit 333-1, and disposed adjacent to one side of the first reception pattern unit 331-1, the 2-1 connection pattern 337-1, and the second reception group of the even-numbered group. It may have a shape corresponding to the edge shape of the pattern part 333 - 1 .

The second connection patterns 337 - 1 and 337 - 3 are patterns for electrically connecting even-numbered groups among a plurality of groups.

The second connection patterns 337-1 and 337-3 are a 2-1 th pattern electrically connecting the first reception pattern part 331-1 and the second reception pattern part 333-1 of each of the even-numbered groups. A connection pattern 337-1, and a 2-2 connection pattern 337-3 electrically connecting the second reception pattern part 333-1 of any one of the even-numbered groups and the first reception pattern part of the next group ) may be included.

The 2-2 connection pattern 337-3 includes the first reception pattern part 331-2, the 1-1 connection pattern, and the second reception of the odd-numbered group located between any one of the even-numbered groups and the next group. Edge shapes of the first reception pattern portion 331-2, the 1-1 connection pattern, and the second reception pattern portion 333-2 disposed adjacent to the other side of the pattern portion 333-2, and of the odd-numbered group and may have a shape corresponding to .

In the touch sensor according to another embodiment of the present invention shown in FIGS. 9 to 10 , a plurality of receiving electrodes RX0''', RX1''', RX2''', ...) is a plurality of driving electrodes. (TX0, TX1, TX2, ...) is disposed on a different layer, compared with the touch sensor shown in FIGS. 2 to 3, the first connection pattern (335-1, 335-3), and the second connection The patterns 337 - 1 and 337 - 3 are formed through conductive vias through the first and second receiving pattern portions 331 - 0 , 333 - 0 , 331-1 , 333 - 1 , 331 - 2 and 333 - 2 . , 331-3), there is an advantage that it can be integrally formed without being connected to it.

11 is a plan view of a portion of a touch sensor according to another embodiment of the present invention, and FIG. 12 is a plan view of the touch sensor shown in FIG. 11 separated into two layers.

The touch sensor shown in FIGS. 11 to 12 has the same plurality of driving electrodes (TX0, TX1, TX2, ...), but a plurality of receiving electrodes ( There is a difference in RX0'''', RX1'''', RX2'''',...). Accordingly, hereinafter, the plurality of receiving electrodes RX0'''', RX1'''', RX2'''', ...) will be described in detail, and the plurality of driving electrodes TX0, TX1, TX2,.. .) is replaced with the above description.

The plurality of receiving electrodes RX0'''', RX1'''', RX2'''', .. .) is disposed on a different layer (1 ^st layer) than the layer on which it is placed (2 ^nd layer).

The plurality of receiving electrodes RX0'''', RX1'''', RX2'''', ...) includes first and second receiving pattern units 332-0, 332-1, 332-2, It may include a first connection pattern 335''' and a second connection pattern 337'''.

The first and second reception pattern units 332-0, 332-1, and 332-2 are alternately disposed along the second direction.

Each of the first and second reception pattern units 332-0, 332-1, and 332-2 may be disposed on a corresponding driving pattern unit 331 illustrated in FIG. 3 .

Each of the first and second reception pattern parts 332-0, 332-1, and 332-2 has an opening OP corresponding to one driving pattern part 311 and the connection pattern 315 shown in FIG. 3 . can have Accordingly, each of the first and second reception pattern units 332-0, 332-1, and 332-2 may have a shape surrounding the outer periphery of one driving pattern unit 331, and the driving shown in FIG. The first and second reception pattern portions 332-0, 332-1, and 332-2 surrounding the outer portion of the pattern portion 311 may have a rectangular or polygonal shape as a whole.

The first connection pattern 335 ″″ electrically connects two adjacent first reception pattern portions 332 - 0 and 332 - 2 , and the second connection pattern 337 ″″ includes two adjacent second reception pattern portions 332 - 0 and 332 - 2 . The reception pattern units 332-1 are electrically connected.

The first connection pattern 335 ″″ may be disposed adjacent to one side of the second reception pattern part 332-1 positioned between the two adjacent first reception pattern parts 332-0 and 332-2. In addition, the second connection pattern 337 ″″ may be disposed adjacent to the other side of the first reception pattern part 332 - 2 positioned between the two adjacent second reception pattern parts 332-1 .

The touch sensor according to another embodiment of the present invention shown in FIGS. 11 to 12 includes a plurality of receiving electrodes RX0'''', RX1'''', RX2'''', ...). Since it is disposed on a different layer from the driving electrodes TX0, TX1, TX2, ..., of the first connection pattern 335''', and the second connection, compared with the touch sensor shown in FIGS. 2 to 3 , The pattern 337''' is not connected to the first and second receiving pattern portions 332-0, 332-1, and 332-2 through a conductive via, but may be integrally formed. .

13 is a modified example of the plurality of receiving electrodes RX0'''', RX1'''', RX2'''', ... shown in FIGS. 11 to 12 .

The plurality of receiving electrodes illustrated in FIG. 13 may not have an opening OP unlike the plurality of receiving electrodes illustrated in FIG. 12 . Since the plurality of receiving electrodes illustrated in FIG. 13 are disposed on different layers from the plurality of driving electrodes, the opening OP may not be provided.

Features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiment has been mainly described in the above, this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains in the range that does not deviate from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications not illustrated are possible. For example, each component specifically shown in the embodiment can be implemented by deformation|transformation. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (25)

a driving electrode including a plurality of driving pattern units arranged in a first direction and a connection pattern for electrically connecting two driving pattern units adjacent to each other in the plurality of driving pattern units; and
a receiving electrode in which first receiving pattern portions and second receiving pattern portions disposed with the connection pattern of the driving electrode interposed therebetween are alternately arranged in a second direction perpendicular to the first direction;
Including, a touch sensor.
The method of claim 1,
The first reception pattern part and the second reception pattern part are symmetrical to each other based on the connection pattern of the driving electrode, a touch sensor.
The method of claim 1,
The first receiving pattern portion has an inverted triangle shape,
The second receiving pattern portion has a triangular shape,
The first receiving pattern portion and the second receiving pattern portion having the same cross-sectional area, a touch sensor.
The method of claim 1,
The receiving electrode includes a first connection pattern and a second connection pattern,
The first and second connection patterns are disposed on different layers from the first and second reception pattern units,
The first receiving pattern portion and the second receiving pattern portion disposed with the connection pattern of the driving electrode therebetween constitute a group,
The first connection pattern electrically connects the first reception pattern part and the second reception pattern part of each of the odd-numbered groups along the second direction among the plurality of groups, and electrically connects the odd-numbered groups connected to,
The second connection pattern electrically connects the first reception pattern part and the second reception pattern part of each of the even-numbered groups along the second direction among the plurality of groups, and electrically connects the even-numbered groups Connected with a touch sensor.
5. The method of claim 4,
The first receiving pattern portion of one of the plurality of groups has a recessed pattern portion corresponding to the protruding pattern portion of the second receiving pattern portion of the other group adjacent to the first receiving pattern portion of the one group,
The second receiving pattern part of the one group has a recessed pattern part corresponding to the protruding pattern part of the first receiving pattern part of another group adjacent to the second receiving pattern part of the one group,
The first connection pattern connects the protruding pattern part of the second receiving pattern part of the other group and the protruding pattern part of the first receiving pattern part of the another group, the touch sensor.
5. The method of claim 4,
The first connection pattern may include a corresponding pattern arranged to have a shape corresponding to and overlap with the first and second reception pattern portions of the even-numbered group among the plurality of groups; and an extension pattern extending in an odd-numbered direction from the corresponding pattern toward the group.
7. The method according to any one of claims 4 to 6,
The driving electrode is disposed on the same layer as the first and second receiving pattern portion, the touch sensor.
The method of claim 1,
The driving pattern portion has a diamond or rhombus shape,
The driving electrode further includes a dummy pattern part disposed in an opening formed inside the driving pattern part,
The dummy pattern portion has a shape corresponding to the driving pattern portion, a touch sensor.
The method of claim 1,
The first and second receiving pattern portions have a shape surrounding the driving pattern portion,
The first and second receiving pattern portions surrounding the driving pattern portion have a rectangular or polygonal shape as a whole, a touch sensor.
The method of claim 1,
The receiving electrode is disposed on a layer different from the layer on which the driving electrode is disposed,
The first receiving pattern portion and the second receiving pattern portion disposed with the connection pattern of the driving electrode therebetween constitute a group,
The receiving electrode includes a first connection pattern electrically connecting odd-numbered groups among a plurality of groups and a second connection pattern electrically connecting even-numbered groups.
a plurality of driving electrodes, each of which includes a plurality of driving pattern units arranged in a first direction and a connection pattern for electrically connecting two driving pattern units adjacent to each other in the plurality of driving pattern units; and
A first reception pattern part disposed on a driving pattern part of each of the odd-numbered driving electrodes among the plurality of driving electrodes, a second reception pattern part disposed on a driving pattern part of each of the even-numbered driving electrodes, and the odd-numbered driving electrode a receiving electrode including a first connection pattern electrically connecting the electrodes, and a second connection pattern electrically connecting the even-numbered driving electrodes;
Including, a touch sensor.
12. The method of claim 11,
The first and second reception pattern portions have openings corresponding to the driving pattern portions, the touch sensor.
a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes;
a driving unit for applying a driving signal to the plurality of driving electrodes of the touch sensor;
a sensing unit for sensing received signals from a plurality of receiving electrodes of the touch sensor; and
Including; a control unit for controlling the driving unit and the sensing unit;
Each of the plurality of driving electrodes includes a plurality of driving pattern units arranged in a first direction and a connection pattern for electrically connecting two driving pattern units adjacent to each other in the plurality of driving pattern units,
Each of the plurality of receiving electrodes, a first receiving pattern portion and a second receiving pattern portion disposed with the connection pattern of the driving electrode therebetween are alternately arranged in a second direction perpendicular to the first direction, touch input Device.
14. The method of claim 13,
The first reception pattern part and the second reception pattern part are symmetrical to each other based on the connection pattern of the driving electrode, a touch input device.
14. The method of claim 13,
The first receiving pattern portion has an inverted triangle shape,
The second receiving pattern portion has a triangular shape,
The first reception pattern part and the second reception pattern part have the same cross-sectional area.
14. The method of claim 13,
The driving pattern portion has a diamond or rhombus shape,
The driving electrode further includes a dummy pattern part disposed in an opening formed inside the driving pattern part,
The dummy pattern portion has a shape corresponding to the driving pattern portion, a touch input device.
14. The method of claim 13,
The first and second receiving pattern portions have a shape surrounding the driving pattern portion,
The first and second receiving pattern portions surrounding the driving pattern portion have a rectangular or polygonal shape as a whole.
14. The method of claim 13,
The receiving electrode includes a first connection pattern and a second connection pattern,
The first and second connection patterns are disposed on different layers from the first and second reception pattern units,
The first reception pattern part disposed on the connection pattern of the driving electrode and the second reception pattern part disposed under the connection pattern of the driving electrode constitute a group,
The first connection pattern electrically connects the first reception pattern part and the second reception pattern part of each of the odd-numbered groups along the second direction among the plurality of groups, and electrically connects the odd-numbered groups connected to,
The second connection pattern electrically connects the first reception pattern part and the second reception pattern part of each of the even-numbered groups along the second direction among the plurality of groups, and electrically connects the even-numbered groups Connected with a touch input device.
19. The method of claim 18,
The first receiving pattern portion of one of the plurality of groups has a recessed pattern portion corresponding to the protruding pattern portion of the second receiving pattern portion of the other group adjacent to the first receiving pattern portion of the one group,
The second receiving pattern part of the one group has a recessed pattern part corresponding to the protruding pattern part of the first receiving pattern part of another group adjacent to the second receiving pattern part of the one group,
The first connection pattern connects the protruding pattern part of the second receiving pattern part of the other group and the protruding pattern part of the first receiving pattern part of the another group, the touch input device.
19. The method of claim 18,
The first connection pattern may include a corresponding pattern arranged to have a shape corresponding to and overlap with the first and second reception pattern portions of the even-numbered group among the plurality of groups; and an extension pattern extending in an odd-numbered group direction from the corresponding pattern.
21. The method according to any one of claims 18 to 20,
and the driving electrode is disposed on the same layer as the first and second receiving pattern units.
19. The method of claim 18,
When the driving unit sequentially applies a driving signal to the plurality of driving electrodes, the receiving electrode outputs a first signal through the first connection pattern and outputs a second signal through the second connection pattern,
The sensing unit subtracts the first signal and the second signal.
14. The method of claim 13,
The receiving electrode is disposed on a layer different from the layer on which the driving electrode is disposed,
The first receiving pattern portion and the second receiving pattern portion disposed with the connection pattern of the driving electrode therebetween constitute a group,
The receiving electrode includes a first connection pattern electrically connecting odd-numbered groups among a plurality of groups and a second connection pattern electrically connecting even-numbered groups.
a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes;
a driving unit for applying a driving signal to the plurality of driving electrodes of the touch sensor;
a sensing unit for sensing received signals from a plurality of receiving electrodes of the touch sensor; and
Including; a control unit for controlling the driving unit and the sensing unit;
Each of the plurality of driving electrodes includes a plurality of driving pattern units arranged in a first direction and a connection pattern for electrically connecting two driving pattern units adjacent to each other in the plurality of driving pattern units,
The plurality of receiving electrodes may include a first receiving pattern portion disposed on a driving pattern portion of each of the odd-numbered driving electrodes among the plurality of driving electrodes, and a first receiving pattern portion disposed on each of the driving pattern portions of the even-numbered driving electrodes. A touch input device comprising: a second reception pattern part; a first connection pattern electrically connecting the odd-numbered driving electrodes; and a second connection pattern electrically connecting the even-numbered driving electrodes.
25. The method of claim 24,
The first and second reception pattern portions have openings corresponding to the driving pattern portions, the touch input device.

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