KR20200020757A - Touch sensor panel - Google Patents

Abstract

The present invention relates to a touch sensor panel which improves a touch sensitivity by an object by reducing a basic capacitance by deforming a driving dummy electrode and/or receiving a dummy electrode. The touch sensor panel according to an embodiment of the present invention comprises: a plurality of driving electrodes extending in a first axis direction from a first layer to sense a touch; a plurality of driving dummy electrodes extending in the first axis direction from the first layer and not sensing the touch; a plurality of receiving electrodes extending in a second axis direction intersecting the first axis direction from a second layer to sense the touch; and a plurality of receiving dummy electrodes extending in the second axis direction from the second layer and not detecting the touch, wherein some of capacitive paths between the driving electrode and the receiving electrode are cut off.

Description

Touch Sensor Panel {TOUCH SENSOR PANEL}

The present invention relates to a touch sensor panel, and more particularly, to a touch sensor panel for reducing a basic capacitance by modifying a driving dummy electrode and / or a receiving dummy electrode.

Various types of input devices are used for the operation of the computing system. For example, input devices such as buttons, keys, joysticks, and touch screens are used. Due to the easy and simple operation of the touch screen, the use of the touch screen in the operation of the computing system is increasing.

The touch screen can include a touch sensor panel, which can be a transparent panel with a touch-sensitive surface. Such a touch sensor panel may be attached to the front of the display screen such that the touch-sensitive surface covers the visible side of the display screen. The touch screen allows a user to manipulate the computing system by simply touching the display screen with a finger or the like. In general, the touch screen recognizes the contact and the contact location on the display screen and the computing system can interpret the contact and perform the calculation accordingly.

In general, the touch sensor panel includes a dummy electrode that does not sense a touch of an object in order to overcome visibility. As such, when the dummy electrode is included, the size of the basic capacitance is increased as compared with the case where only the normal electrode is included. In particular, when the patterns of the dummy electrode and the common electrode overlap each other, The size can be quite large, which causes a problem that the touch sensitivity by the object is reduced.

The present invention has been made to solve the above problems, and an object thereof is to improve touch sensitivity by an object by reducing a basic capacitance by modifying a driving dummy electrode and / or a receiving dummy electrode.

The touch sensor panel according to the embodiment of the present invention extends in the first axial direction on the first layer to drive a plurality of driving electrodes for sensing the touch, and extends in the first axial direction on the first layer to not sense the touch. A plurality of driving dummy electrodes, a plurality of receiving electrodes extending in a second axis direction crossing the first axis direction in the second layer, and sensing in a second axis direction in the second layer; It includes a plurality of receiving dummy electrode that does not detect,

Part of the capacitance path between the driving electrode and the receiving electrode is cut off.

According to the touch sensor panel according to the embodiment of the present invention, the driving dummy electrode and / or the receiving dummy electrode are deformed to reduce the basic capacitance, and the touch sensitivity by the object is improved.

1 is a schematic diagram of a capacitive touch sensor panel according to an embodiment of the present invention.
FIG. 2 is a diagram referred to illustrate the arrangement of each electrode when the touch sensor panel according to the embodiment of the present invention includes the driving dummy electrode and the receiving dummy electrode in addition to the driving electrode and the receiving electrode.
3 is a diagram illustrating an example in which a driving dummy electrode and / or a receiving dummy electrode is deformed so that a part of the capacitance path between the driving electrode and the receiving electrode is blocked according to an embodiment of the present invention.
4 and 5 are views referred to to show the shape of the touch sensor panel configured with the dummy electrode modified according to the embodiment of the present invention.
6 is a view referred to describe an experimental example in which the basic capacitance is reduced by blocking a part of the capacitance path between the driving electrode and the receiving electrode according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the 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 is to 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 invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, a touch sensor panel 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a schematic diagram of a capacitive touch sensor panel 1 according to an embodiment of the present invention. As shown in FIG. 1, the capacitive touch sensor panel 1 according to an exemplary embodiment of the present invention has a driving electrode 10, a receiving electrode 20, and a driving electrode 10 between the receiving electrode 10 and the receiving electrode 20. It may be configured to include an insulating layer 300 located in. In this case, the touch sensor panel 1 according to the exemplary embodiment of the present invention may detect a change in capacitance between the driving electrode 10 and the receiving electrode 20 and convert the same into an appropriate electrical signal and output the same.

In this case, as shown in FIG. 1, the driving electrode 10 may be arranged on the first insulating sheet 100, and the receiving electrode 20 may be arranged on the second cutting layer sheet 200. The driving electrode 10 and the receiving electrode 20 may be arranged on surfaces facing each other of the first insulating sheet 100 and the second insulating sheet 200, respectively. The first insulating sheet 100 and / or the second insulating sheet 200 may be an insulating material such as polyethylene terephthalate (PET) or glass. The driving electrode 10 and the receiving electrode 20 may be indium tin oxide (ITO) electrodes, respectively.

According to FIG. 1, the driving electrode 10 and the receiving electrode 20 are disposed on different layers, the driving electrode 10 is disposed under the layer, and the receiving electrode 20 is disposed on the upper layer than the driving electrode 10. Although illustrated as being disposed, the scope of the present invention is not limited thereto, and the same may be applied to the case in which the driving electrode 10 is disposed on the upper layer and the receiving electrode 20 is disposed on the lower layer.

The driving electrode 10 and the receiving electrode 20 may be disposed to cross each other. The touch sensor panel 1 according to the embodiment of the present invention has a predetermined capacitance, that is, a capacitance value at each intersection of the driving electrode 10 and the receiving electrode 20, and an object such as a body part or a stylus is close to each other. If so, the value of the capacitance may be changed. As such, an insulating layer 300 may be included between the driving electrode 10 and the receiving electrode 20 so that mutual capacitance may be formed between the driving electrode 10 and the receiving electrode 20. The insulating layer 300 is an optically transparent adhesive material (OCA: Optical Clear Adhesive) or resin (resin) so that the first insulating sheet 100 and the second insulating sheet 200 can be bonded to each other It may be made of the same material.

In the exemplary embodiment of the present invention, a driving signal may be applied to the driving electrode 10, and the receiving electrode 20 is coupled by a mutual capacitance between the driving electrode 10 and the receiving electrode 20. The drive signal can be received. The mutual capacitance between the driving electrode 10 and the receiving electrode 20 may change according to the contact of a part of an object such as a body or a stylus, and the touch of the object and its position may be sensed by detecting such a change in electrical characteristics. can do.

Hereinafter, a structure capable of reducing the base capacitance of the touch sensor panel 1 according to an exemplary embodiment of the present invention will be described. In general, when the object does not touch the touch sensor panel 1, the basic capacitance generated by the touch sensor panel 1 itself may include only the driving electrode 10 and the receiving electrode 20 as shown in FIG. 1. As shown in FIG. 2, when the driving dummy electrode 11 and the receiving dummy electrode 21 are included in addition to the driving electrode 1 and the receiving electrode 20, the size thereof becomes larger. When the driving dummy electrode 11 and the receiving dummy electrode 21 are included, the size of the basic capacitance becomes considerably larger, thereby lowering the touch sensitivity. Accordingly, in the present invention, the touch dummy panel 11 and / or the receiving dummy electrode 11 may be improved so that the touch sensitivity may be improved even in the touch sensor panel 1 including the driving dummy electrode 11 and the receiving dummy electrode 21. 21 is to implement the modified touch sensor panel (1).

FIG. 2A illustrates each electrode in the case where the touch sensor panel 1 according to the exemplary embodiment of the present invention includes the driving dummy electrode 11 and the receiving dummy electrode 21 in addition to the driving electrode 10 and the receiving electrode 20. It is sectional drawing which shows an arrangement. 2B illustrates the driving electrode 10 and the driving dummy electrode 11 of the touch sensor panel 1 of FIG. 2A, and the receiving electrode 20 of the touch sensor panel 1 of FIG. 2A is illustrated in FIG. 2C. The receiving dummy electrode 21 is shown.

As illustrated in FIG. 2B, the touch sensor panel 1 according to the exemplary embodiment of the present invention extends in the first axial direction from the first layer and includes a plurality of driving electrodes 10a, 10b, 10c, and 10d for sensing a touch. And a plurality of driving dummy electrodes 11a, 11b and 11c extending in the first axial direction from the first layer and not sensing the touch.

As illustrated in FIG. 2C, the touch sensor panel 1 according to the exemplary embodiment of the present invention extends in a second axis direction crossing the first axis direction in the second layer, and thus includes a plurality of receiving electrodes 20a for sensing a touch. , 20b, 20c, and 20d and a plurality of receiving dummy electrodes 21a, 21b, and 21c extending in the second axis direction from the second layer and not sensing the touch.

In this case, the driving dummy electrode 11 and / or the receiving dummy electrode 21 are deformed to cut off some of the capacitance paths between the driving electrode 10 and the receiving electrode 20, thereby reducing the basic capacitance. It will be described in Figure 3 below.

FIG. 3A is assuming that a part of FIG. 2A is enlarged and cut in the A-B direction, and sectional views when cut in the A-B direction are shown in FIGS. 3B to 3D.

As shown in FIG. 3B, at least some of the plurality of receiving dummy electrodes 21 are disposed at positions facing the positions where the plurality of driving electrodes 10 are disposed, and the plurality of driving dummy electrodes 11 are at least partially. May be disposed at a position facing the position where the plurality of receiving electrodes 20 are disposed. The capacitance path at this time is shown by an arrow. That is, it can be seen that the basic capacitance is formed between the driving electrode 10 and the receiving electrode 20 through the receiving dummy electrode 21 and the driving dummy electrode 11.

On the other hand, in FIG. 3C, a part of the driving dummy electrode 11 of FIG. 3B is deformed to partially block the path of the basic capacitance.

As shown in FIG. 3C, a part of the driving dummy electrode 11 may be deformed by cutting, and in particular, a part of the driving dummy electrode 11 may be cut along the outline of the receiving electrode 20 into a plurality of pieces. Can be divided. In this case, the driving dummy electrode is not formed in the region I of the first layer corresponding to the outline of the receiving electrode 20 formed in the second layer. In addition, at least a portion (including Z ′) of the plurality of driving dummy electrodes 11 may be disposed at a position facing the position at which the plurality of receiving electrodes 20 are disposed, and the plurality of driving dummy electrodes 11 may have a remaining position. A portion Z is disposed at a position facing the position where the plurality of receiving electrodes 20 are not disposed. Unlike FIG. 3B, in FIG. 3C, the capacitance is blocked between the first driving dummy electrode Z and the second driving dummy electrode Z ′ disposed in the first layer, thereby reducing the basic capacitance. Can be.

According to an exemplary embodiment of the present invention, as shown in FIG. 3E, a predetermined distance is provided between at least a portion (including Z ′) of the plurality of driving dummy electrodes 11 and an outline of the receiving electrode 20 formed on the second layer. (d) may be spaced more than According to another embodiment of the present invention, as shown in FIG. 3F, at least a portion (including Z ′) of the plurality of driving dummy electrodes 11 and an outline of the receiving dummy electrode 21 formed on the second layer are predetermined. May be spaced apart by more than d. The predetermined distance d described in FIGS. 3E and 3F may be preset and stored in a memory (not shown).

In FIG. 3D, a part of the receiving dummy electrode 21 of FIG. 3B is deformed to partially block the path of the basic capacitance.

As shown in FIG. 3D, a part of the receiving dummy electrode 21 may be deformed by cutting. In particular, a part of the receiving dummy electrode 21 may be cut along the outline of the driving electrode 10 into a plurality of pieces. Can be divided. In this case, the receiving dummy electrode is not formed in the region I 'of the second layer corresponding to the outline of the driving electrode 10 formed in the first layer. At least a portion (including F) of the plurality of receiving dummy electrodes 21 is disposed at a position facing the position where the plurality of driving electrodes 10 are disposed, and the plurality of receiving dummy electrodes 21 is the remaining portion (F). ') Is disposed at a position facing a position where the plurality of driving electrodes 10 are not disposed. Unlike FIG. 3B, in FIG. 3D, the capacitance path between the first receiving dummy electrode F and the second receiving dummy electrode F ′ formed in the second layer is blocked, thereby reducing the basic capacitance. have.

According to the exemplary embodiment of the present invention, as shown in FIG. 3G, a predetermined distance is defined between at least a portion (including F) of the plurality of receiving dummy electrodes 21 and the outline of the driving electrode 10 formed in the first layer. d) may be spaced over. According to another embodiment of the present invention, as shown in FIG. 3H, a predetermined distance between at least a portion (including F) of the plurality of receiving dummy electrodes 21 and the outline of the driving dummy electrode 11 formed in the first layer is predetermined. It may be spaced more than the distance (d). The predetermined distance d described in FIGS. 3G and 3H may be preset and stored in a memory (not shown).

As such, as the deformation of the dummy electrode as illustrated in FIGS. 3C to 3H, the basic capacitance may be reduced, and the touch sensitivity may be improved.

Hereinafter, the shape of the touch sensor panel including the modified dummy electrode and the modified dummy electrode described above will be described.

As shown in FIG. 4A, each of the plurality of driving electrodes 10a includes a plurality of driving electrode pads 100a, 100b, and 100c connected in a first axis direction, and as illustrated in FIG. 4B, a plurality of driving electrodes 10a. Each of the receiving electrodes 20a may be configured by connecting the plurality of receiving electrode pads 200a, 200b, and 200c in a second axis direction.

As illustrated in FIG. 4C, the plurality of driving dummy electrodes 11a and 11b may include at least one driving dummy pad 110a at positions facing the receiving electrode pads 200a. As shown in FIG. 5A, the driving dummy pad 110a surrounds the first driving dummy pad A and the first driving dummy pad A, which are disposed at the center facing the receiving electrode pad 200a. As a result, a plurality of second driving dummy pads B1 and B2 disposed at positions facing the position where the receiving electrode pad 200a is disposed, and a plurality of third driving dummy pads disposed outside the receiving electrode pad 200a ( C). According to an embodiment, at least a portion B2 of the second driving dummy pads B1 and B2 disposed at a position facing the position where the receiving electrode pad 200a is disposed is disposed outside the receiving electrode pad 200a. The size of the third driving dummy pad C may be the same.

As shown in FIG. 4D, the plurality of receiving dummy electrodes 21a and 21b may include at least one receiving dummy pad 210a at a position facing the driving electrode pad 100a. The receiving dummy pad 210a is disposed outside the first receiving dummy pad A ′ and the driving electrode pad 100a disposed at the center of the position facing the driving electrode pad 100a as shown in FIG. 5B. It may include a plurality of second receiving dummy pad (B ', B' '). According to an exemplary embodiment, the sizes of the second receiving dummy pads B ′ and B ″ disposed outside the driving electrode pad 100a may be the same.

 In the case of the present invention, the shape of the driving electrode pad / receiving electrode pad or the driving dummy pad / receiving pad may have various shapes such as a lozenge shape, a hexagon shape, and an octagonal shape.

The shape or position of the driving electrode / receiving electrode is not limited to the illustrated embodiment, and the shape of the driving electrode (and the driving dummy electrode) of the illustrated embodiment is configured as the shape of the receiving electrode (and the receiving dummy electrode), An embodiment in which the shape of the receiving electrode (and receiving dummy electrode) of the embodiment is configured in the shape of the driving electrode (and driving dummy electrode) is also possible. In addition, the shape of the receiving electrode (and receiving dummy electrode) and the driving electrode (and driving dummy electrode) may both be the shape of the receiving electrode (and receiving dummy electrode), or the shape of the driving electrode (and driving dummy electrode) shown. You can also do

Hereinafter, in the touch sensor panel 1 including the driving dummy electrode 11 and the receiving dummy electrode 21, the driving dummy electrode 11 and / or the receiving dummy electrode 21 may be deformed to drive the electrode 10. Experimental example in which the basic capacitance is reduced by blocking a part of the capacitance path between the electrode and the receiving electrode 20 will be described.

FIG. 6A illustrates an example of the touch sensor panel 1 in which the driving dummy electrode 11 and the receiving dummy electrode 21 are not included as shown in FIG. 1. In this case, the magnitude of the basic capacitance is about 0.6 pF.

FIG. 6B is an example of the touch sensor panel 1 including both the driving dummy electrode 11 and the receiving dummy electrode 21 as shown in FIG. 3B. In this case, the magnitude of the basic capacitance represents approximately 4.7 Pf. Can be. That is, it can be seen that the touch sensitivity is reduced due to the significantly larger size of the basic capacitance than in FIG.

On the other hand, in FIG. 6C, both the driving dummy electrode 11 and the receiving dummy electrode 21 are included, and both the driving dummy electrode 11 and the receiving dummy electrode 21 are deformed, thereby driving the driving electrode 10 and the receiving electrode 20. As an example of the touch sensor panel 1 in which some of the capacitive paths are cut off, it can be seen that the magnitude of the basic capacitance is reduced to approximately 0.7 pF in this case, compared to the case of FIG. 6B.

FIG. 6D illustrates that both the driving dummy electrode 11 and the receiving dummy electrode 21 are included, and only the driving dummy electrode 11 is deformed to block a part of the capacitance path between the driving electrode 10 and the receiving electrode 20. As an example of the touch sensor panel 1, it can be seen that in this case, the magnitude of the basic capacitance is reduced to approximately 0.9 pF as compared to the case of FIG. 6B.

6E includes both the driving dummy electrode 11 and the receiving dummy electrode 21, and only the receiving dummy electrode 21 is deformed to block a part of the capacitance path between the driving electrode 10 and the receiving electrode 20. As an example of the touch sensor panel 1, it can be seen that in this case, the magnitude of the basic capacitance is reduced to approximately 0.9 pF as compared with the case of FIG.

In the case of FIGS. 6D and 6E, although the size of the basic capacitance is not significantly reduced in the same manner as in FIG. 6C, it can be seen that the size of the basic capacitance is reduced similarly to the case of FIG. 6C. That is, in the present invention, even if both the driving dummy electrode 11 and the receiving dummy electrode 21 are deformed, or if either the driving dummy electrode 11 or the receiving dummy electrode 21 is deformed, the magnitude of the basic capacitance is increased. By greatly reducing, it can be seen that the touch sensitivity is improved.

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, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be interpreted that the contents related to such a combination and modification are included in the scope of the present invention.

In addition, the above description has been made with reference to the embodiment, which is merely an example, and is not intended to limit the present invention. Those skilled in the art to which the present invention pertains may have illustrated the above without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to these modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

Claims (6)

A plurality of driving electrodes extending in a first axis direction from the first layer to sense a touch;
A plurality of driving dummy electrodes extending from the first layer in the first axis direction and not sensing a touch;
A plurality of receiving electrodes extending in a second axis direction crossing the first axis direction in a second layer to sense a touch; And
And a plurality of receiving dummy electrodes extending in the second axial direction from the second layer to not sense a touch.
The plurality of receiving dummy electrodes are disposed to face the plurality of driving electrodes,
The plurality of driving dummy electrodes are disposed to face the plurality of receiving electrodes.
Each receiving dummy pad constituting each of the plurality of receiving dummy electrodes is not formed in an area of the second layer corresponding to an outline of each driving electrode pad constituting each of the plurality of driving electrodes formed on the first layer,
Each driving dummy pad constituting each of the plurality of driving dummy electrodes is not formed in an area of the first layer corresponding to an outline of each receiving electrode pad constituting each of the plurality of receiving electrodes formed on the second layer. ,
Some of the capacitance paths between the plurality of driving electrodes and the plurality of receiving electrodes are blocked;
Touch sensor panel.
The method of claim 1,
Each driving dummy pad includes pad portions spaced apart from each other,
The pad parts may include first pad parts disposed at the center facing the respective receiving electrode pads, second pad parts disposed at positions surrounding the first pad parts, and positions at the positions surrounding the second pad parts. Third pad portions, and fourth pad portions disposed outside the respective receiving electrode pads,
Touch sensor panel.
The method of claim 2,
The third pad portions and the fourth pad portions are disposed at positions facing each other with respect to the outline of the respective receiving electrode pads, and the sizes of the third pad portions and the fourth pad portions are the same.
Touch sensor panel.
The method of claim 1,
Each receiving dummy pad includes pad portions spaced apart from each other,
The pad parts may include first pad parts disposed at the center of the position facing the driving electrode pads, and second pad parts disposed outside the driving electrode pads.
Touch sensor panel.
The method of claim 1,
Mutual capacitance between the plurality of driving electrodes and the plurality of receiving electrodes is changed,
A touch position of the object with respect to the touch sensor panel is detected based on the change in the mutual capacitance,
Touch sensor panel.
The method of claim 1,
At least one of each of the driving electrode pads, the receiving electrode pads, the driving dummy pads, and the receiving dummy pads has a rhombic shape.
Touch sensor panel.

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