KR20130006296A - Panel for sensing touch input - Google Patents

Abstract

PURPOSE: Touch sensing panel is provided to provide precise sensing resolution compared to the number of electrode channels, strong at noise, and determine touch position more precisely, thereby provide improved linearity. CONSTITUTION: Touch extraction area(120) is formed as monolayer in one side of substrate, and includes touch areas generating variation of capacitance by touch. External wire area(130) is arranged in one side of the substrate, and is prepared in the outside of the touch extraction area. Vertical electrode(C11-C18) is extended to the external wire area, and is arranged in longitudinal axes. The vertical electrode comprises sensing sectors. Patches forms a part of the touched area, and comprises conductive material arranged adjacent to the vertical electrodes. The patch comprises a part of transverse electrode. Dummy electrodes are insulated from a part of the vertical electrodes or the patches.

Description

Touch Sensing Panel {PANEL FOR SENSING TOUCH INPUT}

The present invention relates to a touch sensing panel having an improved touch sensitivity, and more particularly, it is possible to more precisely determine a contact position with electrodes of the same area, to reduce the number of required channels, and to reduce the influence of noise. The present invention relates to a touch sensing panel having improved visibility.

As mobile phones equipped with touch screens are widely used and various types of smart phones are popularized, research on touch sensing technology is being actively conducted.

The touch screen, a typical touch sensing device, can be classified into resistive film, capacitive, ultrasonic, infrared, etc. according to its operation method. Among them, the capacitive touch screen is durable and has long life and supports multi-touch function. In recent years, the field of application is expanding.

The capacitive touch screen detects the contact position based on the change in capacitance caused by the user's touch applied to the front of the display window, and has the advantage of being durable and supporting the multi-touch function.

Since the capacitive touch screen is based on the capacitance change caused by the user's touch, the touch screen may not be recognized when the stylus pen or the like is recognized as the capacitance change.

The capacitive touch screen is important in the structure of the touch sensing panel in order to better detect the change in capacitance, and the structure of the panel for detecting the touch of a portion having a small change in capacitance, such as a user's fingernail, is required.

In addition, since the touch detection signal is not distorted during contact, a touch sensing panel capable of accurately determining a user's intended contact position is required.

A typical electrode structure for sensing a multer touch has an electrode pattern of a two-layer structure, which consists of electrode lines arranged in the X-axis direction and electrode lines arranged in the y-axis direction in each layer. Since the electrode pattern of the two-layer structure must form an electrode pattern for each layer and join each layer, the process is complicated and the manufacturing cost increases. Accordingly, the present applicant has developed an electrode pattern to enable multi-touch even when using an electrode pattern having a single layer structure. Since the electrode pattern of the one-layer structure is narrow between adjacent electrodes and internal wirings, when defects such as etching or foreign matter flow in the manufacturing process step, electrodes connected to different channels may be short-circuited with each other to cause product defects. In order to reduce product defects due to short circuits, increasing the distance between the electrodes generates pattern visible shapes due to the difference in transmittance caused by the etching portions and the non-etching portions, and the visibility is deteriorated and it is necessary to overcome them.

Accordingly, one of the objects of the present invention is to provide a touch sensing panel capable of increasing a touch recognition rate even with a low capacitance change caused by a user's touch.

It is yet another object of the present invention to provide a touch sensing panel that can increase the substantial sensing area relative to the number of electrode channels arranged.

Another object of the present invention is to increase linearity without distorting the signal of the touch sensing panel.

It is another object of the present invention to provide a touch sensing panel which can accurately perform a plurality of touch inputs and resists noise.

Another object of the present invention is to provide a touch sensing panel which reduces defect rate by preventing short circuits of electrodes connected to different channels due to etching failure or foreign matter inflow, and improves visibility according to the difference in transparency between the electrode and the non-electrode. have.

The touch sensing panel according to the present invention includes: a touch detection region formed as a single layer on one surface of a substrate and forming a plurality of sensing regions in which capacitance change occurs due to user contact; An external wiring region disposed on one surface of the substrate and provided outside the contact detection region; And a shielding layer disposed on the contact detection region for electrical shielding, wherein the contact detection region extends to the external wiring region, forms a portion of the sensing region, and is arranged on a plurality of longitudinal axes. A plurality of columns of; A plurality of patches of conductive material formed in the same layer as the plurality of columns and forming a portion of the sensing region and arranged adjacent to the plurality of columns; And a plurality of inner wires disposed on the same layer as the plurality of columns and the plurality of patches, electrically connected to each of the plurality of patches, and extending to the outer wiring area, wherein a plurality of inner wires are formed. The first patch located in the row and the second patch located in the second row overlap at least a portion of each orthographic projection about the longitudinal axis.

According to the present invention, the touch sensing panel has a precise sensing resolution compared to the number of disposed electrode channels, and is resistant to noise. In addition, the contact position can be accurately determined, thereby improving linearity. By the dummy electrode according to the present invention, the visibility is improved and the defective rate due to the short circuit can be remarkably improved.

1 is a structural diagram showing a part of a touch sensing panel according to an embodiment of the present invention;
2 is a structural diagram showing various embodiments of the arrangement of the split electrodes according to the present invention;
3 is a structural diagram showing another embodiment of the arrangement of the vertical electrode according to the present invention;
4 is an enlarged partial view of a region in which a plurality of sensing regions of FIG. 1 are formed;
5 is a plot of mutual capacitance as seen in the cross section of some regions of FIG.
6 is an enlarged partial view of a portion of FIG. 1;
7 is a structural diagram showing a part of a touch sensing panel according to another embodiment of the present invention;
8 is a structural diagram illustrating a plurality of sensing regions formed in a partial region of FIG. 7;
FIG. 9 is a top view for identifying a position of a contact object in an enlarged view of the partial region 280 of FIG. 7;
10 is a structural diagram showing a part of a touch sensing panel according to another embodiment of the present invention;
FIG. 11 is an enlarged partial view of a partial region of the panel according to FIG. 10;
12 is a structural diagram showing a part of a touch sensing panel according to another embodiment of the present invention;
13 is a structural diagram showing a part of a touch sensing panel according to another embodiment of the present invention;
14 is a top view of the panel showing the degree of linearity,
15 is a structural diagram showing a touch sensing panel including a shielding layer according to another embodiment of the present invention;
16 is an electrode layout view showing a portion of a contact detection region according to an embodiment of the present invention;
17 is an enlarged layout view of a part of the electrode according to FIG. 16;
18 is an electrode layout view showing a portion of a contact detection area according to an embodiment of the present invention;
19 is a structural diagram showing a part of a vertical electrode according to FIG. 18, and
20 is a structural diagram illustrating another embodiment of the vertical electrode of FIG. 18.

The present invention relates to a touch sensing panel applied to a touch sensing device such as a touch pad or a touch screen. The touch sensing device refers to a device for sensing a user's touch occurring at a specific position on a panel that is provided to be superimposed on a display screen or separated from the display screen. The contact information and the contact position information obtained at this time are used for operation control and screen manipulation of a computer system equipped with a touch sensing device. The touch sensing panel according to the present invention may be mounted or attached to a digital device, and as a digital device, a desktop PC, a notebook, a tablet PC, a kiosk equipped with a large display, a mobile communication terminal, a smartphone, a smart pad, Digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation, e-book terminals, and the like.

The touch sensing panel described herein is not only used as a mutual capacitive multi-touch sensing panel, but also applied to a magnetic capacitive sensing panel or a single-touch sensing panel. Although also described with respect to an orthogonal array of transverse and longitudinal electrodes capable of sensing transverse and longitudinal contact locations, the electrodes may be arranged to include diagonal, sector, concentric, three-dimensional and arbitrary orientations.

As used in this specification (including claims), "adjacent" is used when there are no other components (except boundary regions) between adjacent components. "Neighbor" means that the same component as the neighboring element is not disposed between neighboring components, but other components may be disposed. For example, in the case of " neighboring vertical electrodes, " it means that no other vertical electrode can be disposed between neighboring vertical electrodes, and the horizontal electrode can be disposed. In addition, when the horizontal electrode and the vertical electrode are adjacent to each other, the horizontal electrode and the vertical electrode do not exist between the adjacent horizontal electrode and the vertical electrode, but other components such as internal electrodes may exist. Means that both components that are partially opposite are adjacent to or adjacent to each other but are not exactly aligned on the virtual axis. For example (hereinafter assuming arbitrary electrode patches A and B), if patches A and B face each other, at least some of the orthogonal projections of patches A and B are at an axis perpendicular to the axis passing through patches A and B. This may mean overlapping cases. Patch A may partially face patch B when the orthogonal projections of patch A and B overlap each other.

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

1 is a structural diagram showing a part of a touch sensing panel according to an embodiment of the present invention. FIG. 2 illustrates various embodiments of the arrangement of the split electrodes according to the present invention. FIG. 2 is an enlarged partial view of a partial region of FIG. 1. FIG. 3 illustrates another embodiment of the vertical electrode according to the present invention. An enlarged partial view of a portion of FIG. 1. 4 is an enlarged partial view of a region in which a plurality of sensing regions of FIG. 1 are formed. FIG. 5 is a plot of mutual capacitance as seen in the cross section of some regions of FIG. 1. FIG. 6 is an enlarged partial view of a partial region of FIG. 1.

In the present specification, an exaggerated enlarged part exists to clarify the boundary areas.

Referring to FIG. 1, the touch sensing panel 100 includes a touch detection region 120 in which a plurality of overlapping sensing regions are arranged on a substrate 110, a wiring region 130 provided outside the touch detection region 120, Sensing electrodes (a plurality of vertical electrodes c11, c12, c13,...) And a plurality of horizontal electrodes 11a, 12a, 13a,. 12b, 13b ...)).

As used throughout this specification, a "sense area" does not need to be physically and electrically separated and means an area where capacitance can be changed by a user's touch input. Therefore, the sensing area may be defined in various forms.

The touch detection area 120 is an area where sensing electrodes for sensing a contact location on the substrate 100 are disposed. The wiring area 130 is an area provided in an area other than the contact detection area 120 on the substrate 100. A plurality of wirings (bus lines) 135 may be disposed on the wiring region 130. The plurality of wires 135 connects the electrodes of the touch detection region 120 with the touch sensing circuit unit (not shown). The touch sensing circuit unit may detect and determine a contact position in the contact area through a change in capacitance according to a user's touch. The sensing electrodes can have extension lines for electrical connection. These extension lines may be arranged up to the wiring area 130. 1, the wirings C1 to C8 connected to the respective vertical electrodes and the wirings 11A to 15A and 11B to 15B connected to the respective horizontal electrodes are illustrated. The plurality of wires may act as the channel 135. Each of the plurality of wirings may be formed in the same layer. In addition, the plurality of wires may be disposed on a different layer from the horizontal electrodes or the vertical electrodes, and may be connected to each of the electrodes through a via. In addition, the plurality of wirings may be disposed on the same layer as the horizontal electrodes or the vertical electrodes. In this case, an insulating material or the like may be applied between the wiring and the horizontal electrode or the wiring and the vertical electrode to insulate the electrode from the wiring. Can be.

In FIG. 1, the plurality of vertical electrodes c11, c12, c13,... C10 are arranged at the plurality of horizontal positions X1 to X8 on the contact detection region 120 to form a sensing region. In addition, the vertical electrode may form the sensing region together with the other electrode. The touch sensing circuit unit may detect the position of the x-axis according to the contact using the vertical electrodes. Each vertical electrode may further include extension lines 141 extending to the wiring region 130. 1 is shown so that all the extension lines of the vertical electrodes extend to the wiring area located on the lower side of the panel, some extension lines may extend to the wiring area located on the upper side of the panel to secure space. As shown in FIG. 1, each vertical electrode is connected to different wirings c11 and C1, c12 and C2, ... through each extension line. In another embodiment of the present invention, the vertical electrodes of a specific position may be electrically connected to each other (see FIG. 3).

Although the plurality of vertical electrodes of FIG. 1 are illustrated in a bar shape extending in the vertical direction, the plurality of vertical electrodes may be formed to repeat a predetermined pattern.

The transverse electrodes 11a, 12a, 13a,..., 11b, 12b, 13b,... Of the plurality of vertical positions Y1, Y2, Y3, Y4,. ..) to form a sensing area. In addition, the horizontal electrode may form the sensing region together with the other electrode. The touch sensing circuit unit may sense the position of the y-axis according to the contact using the horizontal electrodes. The horizontal electrodes are preferably disposed adjacent to the vertical electrodes on the same layer as the vertical electrodes c11, c12, c13,... Each of the horizontal electrodes may include split electrodes at specific positions electrically connected to each other, and extension lines 143 and 145 for electrically connecting the split electrodes in the wiring region 130. In the present invention, the split electrodes at a specific position may mean that they are substantially aligned with respect to any one horizontal axis. In other words, the horizontal axis passing through the center of one split electrode of one horizontal electrode means passing through the center of the other split electrodes. In the present invention, the extension lines 143 and 145 of the horizontal electrodes may be referred to as internal wiring, and may be referred to as components separate from the horizontal electrodes. The internal wires may be divided into a first internal wire portion disposed mostly on the contact detection region 120 and a second internal wire portion disposed mostly in the wiring region 130. The split electrodes may be formed simultaneously with the internal wirings, or may be formed simultaneously with the first internal wiring portions.

The plurality of vertical electrodes and the plurality of horizontal electrodes of FIG. 1 are formed of a substantially conductive transparent material such as indium tin oxide (ITO), ZnO, IZO, CNT, and the like, and each electrode is preferably formed of the same material. Some of the extension lines of the transverse electrodes may be formed of metallic material to increase electrical conductivity or to increase thermal resistance when connecting to external wiring through vias. For example, the extension line (first internal wiring portion) disposed in the contact detection region 120 is formed of a conductive transparent material, and the extension line (second internal wiring portion) disposed outside the contact detection region 120. It can also be formed from silver, copper, or the like.

The substrate 110 according to FIG. 1 may be a transparent window. Transparent windows include rigid PET (polyethylene terephthalate), PC (polycarbonate), polyether sulfone (PES), polyimide (PI), and PolyMethly MethaAcrylate (PMMA). It can be formed of a material. The transparent window serves to maintain the appearance of the touch sensing panel, and at least some areas are exposed to the outside to receive contact of a user's body or a conductive object such as a stylus pen. At this time, it is possible to selectively add a protective layer (not shown) in order to prevent damage or destruction of the transparent window due to the contact. For reference, the term 'contact' as used throughout this specification is broadly interpreted to mean that a conductive object is approached by a considerable distance from the contact receiving surface in addition to the direct contact with the contact receiving surface. That is, the touch sensing panel and the touch input sensing apparatus equipped with the same according to the present invention should be interpreted as a panel or a device having a function of recognizing a contact of a conductive object or recognizing a proximity within a considerable distance.

In this embodiment, the sensing electrodes (the plurality of horizontal and vertical electrodes) may be formed on separate substrates, and may be formed through a process of attaching the sensing electrode and the transparent window using an adhesive material such as an optical clear adhesive (OCA). have. That is, the sensing electrode is patterned by forming an ITO-forming surface of an ITO film material having ITO formed on one or both surfaces of polyethylene terephtalete (PET) or thin glass, and attaching the patterned ITO film to a transparent window. Can form them. In an embodiment of patterning both surfaces of an ITO film, the vertical electrode may be patterned on one surface of the film, and the horizontal electrode may be patterned on the other surface of the film. In this case, it is preferable to attach the ITO film to the transparent window so that the vertical electrode is disposed between the transparent window and the film.

In addition, the sensing electrodes (a plurality of horizontal and vertical electrodes) may be directly patterned on one surface of the transparent window so that the horizontal and vertical electrodes may be integrally formed with the transparent window. Accordingly, in the manufacturing process of the touch sensing panel, it is possible to simplify the manufacturing process and increase the yield by omitting the process of attaching the sensing electrodes (horizontal and vertical electrodes) and the window having a high defective rate. By simplifying the process, the production cost of the touch sensing panel can be lowered. Such integration may reduce the thickness of electronic devices to which the touch sensing panel is applied.

Throughout this specification, the expression integrally or integrally has a meaning in which the sensing electrode 120 is directly formed on one surface of the transparent window 110 without a separate adhesive layer such as OCA. Instead of forming a sensing electrode on a separate member in the form of an ITO film and then attaching the sensing electrode to a transparent window, the sensing electrode is formed directly on the transparent window by a method such as sputtering or ion plating and etching. to be. That is, it means any method which does not include the attachment process to a transparent window in a formation process. Therefore, in addition to directly patterning the sensing electrode on an exposed surface of the transparent window, the sensing electrode may be formed on the surface of the transparent window coated with a separate layer such as a shatterproof film or a transparent resin by the above method. It is a concept to include.

In one embodiment, instead of integrally forming all of the sensing electrodes on the substrate (transparent window) at once, they may be integrally formed in a separate process. For example, vertical electrodes may be formed on one surface of the transparent window, an insulating layer may be coated thereon, and horizontal electrodes may be formed thereon. In another embodiment, only some of the sensing electrodes may be integrally formed. For example, only the vertical electrode may be integrally formed in the transparent window, the horizontal electrode may be formed in a separate member in the form of an ITO film, and then the ITO film may be attached to the transparent window.

In the present invention, at least two vertical electrodes may be arranged in a group so as to be adjacent to each other in turn. When the panel according to the present invention operates as a mutual capacitive panel, it is possible to determine the precise position by overlapping or combining signals sensed by the vertical electrodes belonging to the same group, so that the vertical electrodes are advantageously disposed adjacent to each other. In particular, as shown in Figure 1, it is preferable that the two vertical electrodes are adjacent to each other. This will be described later. Although in FIG. 1 two vertical electrodes are shown to be adjacent to each other, for the purpose of dense horizontal position sensing, each vertical electrode may be arranged to be spaced at a constant distance.

When the vertical electrodes according to the present invention are arranged adjacent to each other by pairing, as shown in FIG. 1, each vertical electrode and each of the wirings C1 to C8 may be connected, but as shown in FIG. 3 to reduce the number of channels. Adjacent longitudinal electrodes on which the split electrodes are arranged may be electrically connected to each other. That is, the vertical electrodes C12 and C13, C14 and C15, and C16 and C17 may be electrically connected. The number of channels C101 to C105 (five) when the adjacent vertical electrodes are coupled in this way is smaller than the number of channels C1 to C8 (eight) when not coupled. Since the divided electrodes disposed between the adjacent coupled vertical electrodes face each other, the divided electrodes are separate horizontal electrodes, and thus, it is possible to accurately determine the contact position. In addition, the overlapping sensing region (described later) includes a portion of the vertical electrode C15 adjacent to one of the split electrodes 14a and one sensing region, and one vertical electrode 14a adjacent to the vertical electrode C15. Since a different sensing region is formed together with a part of C16, the position determination according to the overlapping sensing region is also not a problem.

At least two horizontal electrodes of the horizontal electrodes according to the present invention may be arranged to pass through the horizontal axis at any position. Referring to the partial region 50 of the contact detection region 120 of FIGS. 1 and 2, the split electrodes 51 disposed at the Y1 position and the odd-numbered X-axis positions X1, X3, X5, and X7 of the Y-axis. Horizontal electrodes 11a including 53, 55, 57, and split electrodes 52, 54, 56, 58 disposed at Y1 and even X-axis positions X2, X4, X6, X8. The horizontal electrodes 11b share the Y1 axis. In this embodiment, the center alignment axes (the lines bisecting the divided electrodes) of the 11a horizontal electrode and the 11b horizontal electrode are arranged to coincide. That is, the orthogonal projection of the 11a transverse electrode and the orthogonal projection of the 11b transverse electrode substantially overlap with respect to the Y axis.

Referring to FIG. 2A in which the partial region 50 of FIG. 1 is enlarged, the horizontal electrodes are horizontal electrodes 11a, 12a, 13a,... Of the first group 10A adjacent to the left side of the vertical electrodes. And horizontal electrodes 11b, 12b, 13b, ... of the second group 10B adjacent to the right side of the vertical electrodes. Although the horizontal electrodes are illustrated in FIG. 1 as being arranged at regular intervals, as shown in FIG. 2B, two divided electrodes among the divided electrodes belonging to the same horizontal electrode may be arranged to be adjacent to each other. The layouts may all appear in one panel.

When the panel 100 according to the present invention operates as a mutual capacitance panel, a driving signal is applied to one or more of the vertical electrodes c11 to c18 and the first and second horizontal electrode groups 10A and 10B. Can be. In this case, peripheral electric field lines (leakage flux) may be formed between adjacent row zones or column zones, and the like. Accordingly, the division electrode and some sector pairs of the vertical electrode adjacent to or close to the division electrode may form a sensing region in which charge can couple from the driving region to the sensing region. When a finger touches over one of the sensing areas, some of the surrounding electric field lines outside the cover of the panel are blocked by the finger, and the amount of charge that couples in the sensing area is reduced. This reduction in combined charge amount can be part of determining the image upon contact. In the case of mutual capacitive panels, a separate reference ground may be unnecessary.

If the panel according to the invention is a mutual capacitive panel (hereinafter assumed to be a mutual capacitive panel, unless specifically referred to as a "self-capacitive panel"), the first and second horizontal electrode groups 10A, 10B ) May be a driving electrode to which a driving signal is applied, and the plurality of vertical electrodes c11 to c18 may be assumed to be sensing electrodes for sensing a sensing signal.

4 is an enlarged partial view of a region 151 in which a plurality of sensing regions of FIG. 1 are formed when the panel according to the present invention is a mutual capacitance panel.

When the panel according to the present invention is a mutual capacitance panel, a predetermined sector of one split electrode or vertical electrode may be part of two or more kinds of sensing regions. The touch sensing circuit unit (not shown) according to the present invention may accurately determine the contact position by extracting and combining each horizontal position component and vertical position component from overlapping sensing regions sharing a partial region. Referring to FIG. 4, the first sensing region 171 of the plurality of sensing regions may be formed on the first divided electrode 161 included in the corresponding region 171 of the 14a horizontal electrode, and the corresponding region 171 of the c15 vertical electrode. The first sensing sector 166 is included. The second sensing region 172 of the sensing region includes a first split electrode 161 and a second sensing sector 167 included in the corresponding region 172 of the c16 vertical electrode. The third sensing region 173 of the sensing region includes a second split electrode 162 and a second sensing sector 167 corresponding to the region 173 of the 14b horizontal electrode. The fourth sensing region 174 of the sensing region includes the second split electrode 162 and the first sensing sector 166. Based on the first sensing sector, the first and fourth sensing regions 171 and 174 share the first sensing sector. Respective first and second split electrodes 161 and 162 and first and second sensing sectors 166 and 167 are used to extract the horizontal position component and the vertical position component of the contact position. Each sensing region may include an overlapping region, and the touch sensing circuit unit may more accurately determine the position of the contact object by using a combination of mutual capacitance changes sensed in each sensing sector (c15 and c16 vertical electrodes).

In FIG. 4, a plurality of sensing regions including an overlapping region are exemplarily limited to divided electrodes and sensing sectors which are sequentially disposed in the horizontal direction and are arranged up and down. The sensing regions may also be regions adjacent to each other, regions in diagonal directions, and regions disposed between the split electrodes in the same row.

FIG. 5 is a plot of mutual capacitance as seen in cross section TT ′ of a partial region 151 of the contact detection region 120 of FIG. 1. 5 shows a first divided electrode 161 of a 13a horizontal electrode, a first sensing sector 166 of a c15 vertical electrode, a second sensing sector 167 of a c16 vertical electrode, disposed in an overlapping sensing region 151, And a cross-section of the second divided electrode 162 of the 13b horizontal electrode in sequence, and illustrates the amount of change in mutual capacitance sensed in each sensing sector according to the position of the finger. On each electrode, a cover glass 112, which is a kind of substrate, is disposed. It is assumed that the first and second split electrodes 161 and 162 are driving electrodes, and the first and second sensing sectors 166 and 167 are sensing electrodes.

5A and 5B illustrate a case where a contact object makes contact between the first driving electrode 161 and the first sensing electrode 166. Referring to FIG. 5A, when a driving signal is applied to the first driving electrode 161, the change amount of mutual capacitance of '100' is observed at the adjacent first sensing electrode 166, and the neighboring first The amount of mutual capacitance change of '20' is sensed by the two sensing electrodes 167.

Referring to FIG. 5B, the second driving electrode 162 is different at a time different from the time when the driving signal is applied to the first driving electrode 161 (the time difference is very small and the fingers are assumed to be at substantially the same position). When the driving signal is applied, the amount of mutual capacitance change of '5' is observed at the first sensing electrode 166 near the finger, and the amount of mutual capacitance change is not present at the second sensing electrode 167 far from the finger. You can check it.

FIG. 5C illustrates a case in which a finger is located closer to the first sensing electrode 166 than the second sensing electrode 167, and a driving signal is applied to the first and second driving electrodes with a parallax so that each sensing is performed. The amounts observed at the electrodes are superimposed. Referring to FIG. 5C, the mutual capacitance change amount of '60' is observed in the first sensing electrode 166, and the mutual capacitance change amount of '30' is observed in the second sensing electrode 167. The more the contact object is positioned toward one of the driving electrodes, the greater the amount of mutual capacitance change detected by the sensing electrode on the biased side.

FIG. 5D illustrates a case where a finger is positioned between the second sensing electrode 167 and the second driving electrode 162 and superimposes the amount of mutual capacitance change observed on the first and second sensing electrodes. Referring to FIG. 5D, the amount of change in mutual capacitance of '105' is observed in the second sensing electrode 167 near the finger, and the value of '20' in the first sensing electrode 166 far from the finger is observed. The amount of change in capacitance is observed.

As shown in the example of FIG. 5, due to the overlapped sensing regions, the touch sensing resolution is improved, thereby improving linearity.

The degree of linearity may be checked to accurately determine the touch position recognition rate of the user. 13 is a diagram representing linearity. The linearity indicates how smoothly the diagonal position pair is judged when the diagonal touch is made to slide diagonally as shown in FIG. The closer the contact location is determined to be diagonal, the better the linearity. 14 (b) and 14 (c) show the contact position determination results of FIG. 14 (a), and FIG. 14 (c) has better linearity.

In this embodiment, in order to increase the touch sensing resolution, a driving signal may be randomly applied to each horizontal electrode as necessary. For example, after the driving signal is sequentially applied to the horizontal electrodes of the first group, the driving signals are sequentially applied to the horizontal electrodes of the second group (11a electrode, 12a electrode, 13a electrode, ..., 11b Electrodes, 12b electrodes, ...), driving signals are sequentially applied to horizontal electrodes belonging to the same row (11a electrode, 11b electrode, 12a electrode, 12b electrode, ...), or driving electrodes arranged in a diagonal direction The driving signals may be sequentially applied to the fields 11a, 12b, 13a, 14b, ..., and other various embodiments.

Referring to FIG. 4, in order for the mutual capacitive panel according to the present embodiment to obtain an optimum touch sensitivity, an area of the first division electrode 161 and an area of the first sensing sector 166 of the first sensing area 171 are obtained. It may be desirable for the same to be substantially the same. The mutually corresponding areas may not be substantially the same, but the error may be offset by increasing the adjacent boundary region so that the leakage electric field is increased. To this end, it is possible to reduce the width of the area bordered by each electrode, to form a periodic geometric pattern on the vertical electrode, and to form the horizontal electrode to fill the area formed by the vertical electrode. The geometric pattern of the vertical electrode may have a triangular or square shape.

Since the vertical electrode is electrically connected on the contact detection region 120, it may be desirable to operate as the sensing electrode. Sensing electrodes should be minimally affected by noise or other signals. Representative noise in a touch sensing panel includes noise caused by a drive signal applied to a driving electrode and noise caused by an electrical effect caused by an internal circuit of a digital device to which the touch sensing panel is attached.

The wiring for supplying the driving signal to the driving electrode may be disposed as far away from the sensing electrode as possible to reduce the influence of the driving signal noise acting on the vertical electrode. For example, as illustrated in FIGS. 1 and 6, the extension lines 902a, 903a, 904a, 905a, etc. of the first horizontal electrode group 10A adjacent to the left side of the vertical electrode may include the first horizontal electrode group 10A. Place it on the left side. Extension lines 902b, 903b, 904b, and 905b of the second horizontal electrode group 10B adjacent to the right side of the vertical electrode are disposed to the right of the second horizontal electrode group 10B. In this case, the first and second horizontal electrode groups 10A and 10B serve as noise covers for the drive signal.

Since the driving electrode may serve as a cover of external noise, it may be preferable that the driving electrodes are disposed at the outermost portion of the substrate. Referring to FIG. 1, the leftmost side of the substrate is disposed with some electrodes of the first horizontal electrode group, and the rightmost axis of the substrate is disposed with some electrodes of the second horizontal electrode group.

The noise emitted by the display can be corrected in software in the touch controller which interprets the signal sensed in the contact detection area.

In addition, even a small change in capacitance caused by a change in the distance between the touch detection area and the display due to an external impact applied to the transparent window may generate noise, which may cause a shielding layer disposed between the digital device and the touch sensing panel. Can be reduced. See FIG. 15 for this.

The touch sensing panel 100 can also operate as a magnetic capacitive panel. In this embodiment, the reference ground plane is the backside of the substrate, the same layer as each electrode, but separated from the vertical electrodes c10 and the first and second horizontal electrode groups 10A, 10B by a dielectric, or separate It can be formed on a substrate. In the magnetic capacitive panel, each sensing area has a magnetic capacitance with respect to the reference ground which can be changed due to the presence of the contact object. In FIG. 1, the electrodes of each of the vertical electrodes and the first and second horizontal electrode groups may independently sense magnetic capacitance.

7 is a structural diagram illustrating a part of the touch sensing panel 200 according to another embodiment of the present invention. FIG. 7 illustrates a case in which at least two horizontal electrodes of the horizontal electrodes of FIG. 1 are arranged such that the horizontal axes of arbitrary positions pass, and the center alignment axes of each of the two horizontal electrodes are different. Descriptions of the components of FIG. 7 corresponding to those of FIG. 1 will be omitted.

The touch sensing panel 200 according to FIG. 7 includes a touch detection region 220 in which a plurality of overlapping sensing regions are arranged on a substrate, a wiring region provided outside the touch detection region 220, and a touch detection region 220. A plurality of vertical electrodes (c21, c22, c23, ...) (C20), and a plurality of horizontal electrodes (21a, 22a, 23a, ..., 21b, 22b, 23b ...) disposed in the Include.

The touch detection area 220 is where sensing electrodes for sensing a contact position on the touch sensing panel are disposed. The wiring area is an area provided outside the contact detection area 220. A plurality of wirings (bus lines) 235 connecting the electrodes of the touch detection region 220 and the touch sensing circuit unit (not shown) may be formed on the wiring region. The touch sensing circuit unit may detect and determine a touch position in the touch area through the change in capacitance according to the touch of the user. An extension line of the sensing electrodes of the contact detection area 220 may be disposed on the wiring area. In FIG. 7, the wirings CC1, CC3, CC5, and CC7 connected to the vertical electrodes and the wirings 21A to 24A and 21B to 24B connected to the respective horizontal electrodes are illustrated. The plurality of wires may act as the channel 235. Each wire may be formed of a metal material. Each of the plurality of wirings may be formed on the same layer. In addition, the plurality of wires may be disposed on a different layer from the horizontal electrodes or the vertical electrodes, and may be connected to each of the electrodes through a via. In addition, the plurality of wires may be disposed on the same layer as the horizontal electrodes or the vertical electrodes. In this case, an insulating material or the like may be applied to the intersections to prevent unnecessary electrical connections.

In FIG. 7, the plurality of vertical electrodes c21, c22, c23,..., Are arranged to be arranged at a plurality of horizontal positions X1 to X8 on the contact detection region 120 to form a sensing region. In addition, one vertical electrode may form a sensing region mutually with the other electrode. The touch sensing circuit unit may detect the position of the x-axis according to the contact using the vertical electrodes. Each vertical electrode may further include extension lines 241 extending into the wiring area. FIG. 7 is shown so that the extension lines of the odd-numbered vertical electrodes c21, c23, c25, c27 extend into the wiring area located on the lower side of the panel. Extension lines of even-numbered vertical electrodes c22, c24, c26, c28 extend to the top side of the panel (not shown). As shown in FIG. 7, each vertical electrode is connected to different wirings c21 and CC1, c23 and CC3,... Through each extension line.

Although the plurality of vertical electrodes of FIG. 7 are illustrated in a bar shape extending in the vertical direction, the plurality of vertical electrodes may be formed to repeat a predetermined pattern.

The horizontal electrodes 21a, 22a, 23a, ..., 21b, 22b, 23b, ... in FIG. 7 are arranged in the plurality of vertical positions Y1, Y2, Y3, Y4, ... on the contact detection area 220. ) May be arranged to form a sensing area. In addition, one horizontal electrode may form a sensing area together with the other electrode. The touch sensing circuit unit may sense the position of the y-axis according to the contact using the horizontal electrodes. The horizontal electrodes are preferably disposed adjacent to the vertical electrodes on the same layer as the vertical electrodes c21, c22, c23,... Each of the horizontal electrodes may include split electrodes at a specific position electrically connected and extension lines 243 and 245 electrically connecting the split electrodes in a wiring area. The split electrodes and extension lines are preferably formed at the same time.

At least two horizontal electrodes of the horizontal electrodes of the panel 200 illustrated in FIG. 7 may pass through horizontal axes at arbitrary positions, and the center alignment axes of the two horizontal electrodes may be different from each other. Referring to FIG. 7, a horizontal electrode 22a including split electrodes 251, 253, 255, and 257 disposed at a Y4 position and an odd-numbered X-axis position X1, X3, X5, and X7 of the Y axis, The horizontal electrode 11b including the split electrodes 252, 254, 256, and 258 disposed at the Y3 position and the even-numbered X-axis positions X2, X4, X6, and X8 share an arbitrary y axis 290. do. In the present embodiment, the horizontal electrodes can be arranged such that the center alignment axis Y4 of the 22a horizontal electrode (the line dividing the divided electrodes) Y4 and the center alignment axis Y3 of the 22b horizontal electrode are different. In FIG. 7, the horizontal electrodes are formed of the horizontal electrodes 21a, 22a, 23a,... Of the first group 20A adjacent to the left side of the vertical electrodes, and of the second group 20B adjacent to the right side of the vertical electrodes. The horizontal electrodes 21b, 22b, 23b, ... may be classified.

8 is a structural diagram illustrating a plurality of sensing regions formed in the partial region 280 of FIG. 7.

In FIG. 8, it is assumed that the panel 200 according to the present invention operates as a mutual capacitive touch sensing panel. When a driving signal is applied to the 23a horizontal electrode of FIG. 8, a part of the divided electrodes of the 23a horizontal electrode are formed with a portion of the c25 sensing electrode and the first sensing region 281, and a portion of the c26 sensing electrode and the second sensing region. 282 is formed. When a driving signal is applied to the 24b horizontal electrode, a part of the 24b horizontal electrode forms a part of the c25 sensing electrode and the third sensing region 283, and forms a part of the c26 sensing electrode and the fourth sensing region 284. do. When a driving signal is applied to the 23b horizontal electrode, a part of the divided electrodes of the 23b horizontal electrode form a part of the c26 sensing electrode and the fifth sensing region 285, and a part of the c25 sensing electrode and the sixth sensing region 286. To form. Based on the sensing sector 270 which is a partial region of the c25 sensing electrode, the first, fourth, and sixth sensing regions 281, 284, and 286 include some or all of the sensing sector 270. With this overlapping sensing region, sensing resolution can be increased and linearity can be improved.

FIG. 9 is a top view illustrating the position of a contact object in an enlarged view of the partial region 280 of FIG. 7.

In FIG. 9, it is assumed that the panel 200 according to the present invention operates as a mutual capacitive touch sensing panel. A position or B position in FIG. 9 indicates an area where a finger or the like contacts. When a driving signal is applied to the 23a horizontal electrode, both the A and B positions sense the same mutual capacitance decrease in the c25 or c26 vertical electrode. However, when the driving signal is applied to the 23b horizontal electrode, the large mutual capacitance decrease is detected at the c25 or c26 vertical electrode only when the contact object is positioned at the A position. That is, by sensing the mutual capacitance decrease by applying driving signals to the 23a, 23b, and 24b horizontal electrodes, respectively, it is possible to know whether the contact object touches the A position or the B position. Of course, it is also possible to know whether a finger or the like touches both A and B by the combination of the detection values. Although only A and B have been described in the drawings, a more accurate position can be determined by a combination of detection values according to each driving signal.

As described above, the panel according to FIG. 9 may obtain a large number of Y coordinates of the contact position even with a small number of driving electrodes. Therefore, it is possible to reduce the number of channels while maintaining a precise resolution.

10 is a structural diagram illustrating a portion of a touch sensing panel according to another embodiment of the present invention. FIG. 10 particularly shows the case where the vertical electrode of FIG. 7 is a triangular pattern. FIG. 11 is an enlarged partial view of a partial region of the panel according to FIG. 10.

The panel according to FIG. 10 includes a plurality of vertical electrodes c31, c32,..., First groups of horizontal electrodes 31a, 32a, ..., and a second group of horizontal electrodes 31b, 32b. , ...).

The c31 vertical electrode of FIG. 10 extends in the vertical direction and is formed in a triangular pattern on the left side. The c32 vertical electrode is disposed adjacent to the right side of the c31 vertical electrode, extends in the vertical direction, a triangular pattern is formed on the right side, and is arranged to be staggered with the pattern of the c31 vertical electrode. The remaining vertical electrodes c33 and c35 and c34 and c36 are arranged to correspond to the c31 or c32 vertical electrodes.

Referring to FIG. 10, the horizontal electrodes of the first and second groups are arranged to be arranged in the vertical direction. The horizontal electrodes of the first group are disposed to be adjacent to the left side in which the triangular pattern of odd-numbered vertical electrodes are formed at a predetermined distance, and the horizontal electrodes of the second group are adjacent to the right side where the triangular pattern of even-numbered vertical electrodes are formed at a certain distance from each other. Is arranged to. Each of the transverse electrodes may include extension lines 340 to be electrically connected outside of the contact detection region.

FIG. 11 illustrates a plurality of overlapping sensing regions that may be formed in some regions 320 of the panel according to FIG. 10. Referring to FIG. 11, first to fourth sensing regions 331 to 334 may be formed in a sensing region to which one sensing sector 340 of the vertical electrode belongs. When the sensing sector 340 operates as a sensing electrode, a plurality of mutual capacitance change signals according to a predetermined driving signal may be sensed. The touch sensing circuit unit (not shown) may overlap or combine the plurality of signals to make more precise contact position determination.

In the case of the electrode pattern illustrated in FIG. 10, the length of the separation line 315 formed in the boundary region in the sensing region 310 is long, thereby increasing the leakage electric field. Accordingly, the mutual capacitance change detection signal may be stronger than without the pattern, and as a result, the accuracy of the contact input determination may be increased.

According to FIG. 10, it is preferable that the width d1 of the separation line formed in the boundary region of each electrode and the width d2 of the extension line of each horizontal electrode do not exceed the setting value, and the smaller the setting value is, the more preferable. The smaller the setting value is, the less the area of the corresponding driving electrode and the sensing electrode becomes substantially the same in each sensing area. Accordingly, the touch sensing circuit unit (not shown) may make the touch input sensing determination more linearly.

12 is a structural diagram illustrating a part of a touch sensing panel according to another embodiment of the present invention. FIG. 12 illustrates a touch sensing panel in which a pattern of the vertical electrode of FIG. 7 is a rectangular protrusion. 12, unlike in FIG. 10, the vertical electrode has a rectangular protrusion pattern.

12, the center alignment axis of the first group of horizontal electrodes (eg, the center alignment axis 410 of the 42a horizontal electrode) and the center alignment axis of the second group (eg, the center of the 42b horizontal electrode) The transverse electrodes are arranged to be different from the alignment axis 420.

Two or more split electrodes disposed adjacent to each other in accordance with each of the horizontal electrodes according to FIG. 12 may be electrically connected to each other. According to this embodiment, it is possible to precisely determine the contact position while reducing the number of channels. Referring to FIG. 12, an electrode belonging to one column of the 42a horizontal electrodes is composed of four patches 431 to 434. The determination of whether a contact is near each patch may be determined by a combination of driving signals near the contact object to which a predetermined driving signal is applied and a sensing signal at a sensing electrode corresponding to the contact object. For example, when a finger touches an area 441 of FIG. 12, a combination of a detection signal according to a 43a horizontal electrode and a 42b horizontal electrode. The combination of the detection signals according to the 42b horizontal electrode and the 41b horizontal electrode when the finger touches the area 442. The combination of the detection signals according to the 41b horizontal electrode and the 41a horizontal electrode when the finger touches the area 443. The contact can be determined. Since the detection signal according to the position 442 is larger than the mutual capacitance change when the driving signal is applied to the horizontally adjacent 42b horizontal electrodes, and the variation of the mutual capacitance when the driving signal is applied to the diagonally adjacent 41b horizontal electrodes, 443 can be distinguished from the combination of the drive signal according to the position.

13 is a structural diagram showing a part of a touch sensing panel according to another embodiment of the present invention. FIG. 13 illustrates a touch sensing panel in which the pattern of the vertical electrode of FIG. 7 is a trapezoidal protrusion.

Referring to FIG. 13, the horizontal electrodes may be classified into two groups 51a to 53a and 51b to 53b, and have two trapezoidal protrusions connected thereto. Vertical electrodes C51 to C58 are formed to surround the divided electrodes of each horizontal electrode.

15 is a structural diagram illustrating a touch sensing panel including a shielding layer according to another embodiment of the present invention.

Referring to FIG. 15, the touch sensing panel 530 is disposed on the digital device 510. In the touch sensing panel 530, a contact detection region 560 is formed on one surface of the external substrate 570, and a shielding layer 540 is formed on the rear surface of the contact detection region 560. The outer substrate 570 functions as a contact surface of the user and a substrate supporting the contact detection region 560. For normal operation of the capacitive touch sensing panel, the outer substrate 570 is made of a material having a uniform dielectric constant and preferably configured to have a constant thickness. The touch detection area 560 is provided with sensing electrodes that can sense a user's touch. The contact detection region 560 may be integrally formed with the external substrate 570 or attached by an adhesion layer.

Due to its characteristics, the touch sensing panel is installed on the outermost surface of a digital device that can be touched by the user. Therefore, it is electrically influenced by the circuit inside the apparatus or the like. Therefore, it is electrically influenced by a circuit or the like inside the apparatus. In the case of a touch pad panel, electrical noise may be introduced from an electrical circuit located at a rear surface thereof, and in the case of a touch screen panel, electrical noise may be introduced from an electrical circuit and a display device located at a rear surface thereof. In addition, even a small change in capacitance caused by a change in the distance between the touch detection area and the display due to an external impact applied to the transparent window may generate noise. The shielding layer 540 can prevent the malfunction due to such electrical noise, thereby improving the performance of the touch sensing panel.

The shielding layer 540 includes a substrate 541, such as polyethylene terephthalate (PET), on which a conductive thin layer 543, such as ITO, is formed. The conductive thin layer 543 serves to substantially block electrical noise. For electrical shielding, the conductive thin layer 543 should be grounded with GND. For this purpose, the shielding layer 540 can include a wiring 545 connected to the ground. The wiring may be a metallic material such as silver. The shielding layer 540 may include a transparent adhesive layer 547, such as an optical clear adhesive (OCA), to couple with the contact sensing area.

When the touch sensing panel 530 is attached to the digital device 510, it is preferable to form an adhesive part 515 on the outside of the digital device 510 so that the air gap 520 is formed.

FIG. 16 is an electrode layout view of a portion of a contact detection region according to an exemplary embodiment of the present invention, and FIG. 17 is an enlarged layout view of a part of the electrode of FIG. 16. In the touch sensing panel according to the present exemplary embodiment, the touch detecting region of the touch sensing panel of FIG. 7 includes a dummy electrode, and the components of FIG. 16 corresponding to those of FIG. 7 may refer to FIG. 7. Can be.

Referring to FIG. 16, the contact detection area according to the present exemplary embodiment includes a plurality of vertical electrodes 310 and 315, a plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374, and a plurality of internal wirings 380. And a plurality of dummy electrodes 320, 322, and 324. The electrode pattern according to the present embodiment may be repeated in the horizontal axis or vertical axis direction.

The plurality of vertical electrodes 310 and 315 may extend in the longitudinal direction and be disposed in the plurality of horizontal positions to form part of the sensing area independently or together with other electrodes. The plurality of vertical electrodes 310 and 315 may be substantially transparent and formed of a conductive material.

The plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374 may be disposed to be adjacent to the plurality of vertical electrodes 310 and 315 to form part of the sensing area independently or together with other electrodes. The plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374 may be formed on the same layer as the plurality of vertical electrodes 310 and 315. The plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374 may be formed of the same material as the plurality of vertical electrodes 310 and 315, and may be manufactured in the same manufacturing process as the plurality of vertical electrodes 310 and 315. Can be formed.

In this embodiment, orthogonal projections on the longitudinal axis of the first horizontal electrode 360 located in a specific column and orthogonal projections on the longitudinal axis of the second horizontal electrode 370 located in another column may partially overlap. As described above with reference to FIG. 8, various overlapping sensing regions may be formed to improve sensing resolution and linearity.

The plurality of internal wires 380 may be electrically connected to each of the plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374. The plurality of internal wires 380 may extend to an outer area of the contact detection area to electrically connect the horizontal electrodes at a specific position. The plurality of internal wires 380 may be formed on the same layer as the plurality of vertical electrodes 310 and 315 or the plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374. The plurality of internal wires 380 may be formed of the same material as the plurality of vertical electrodes 310 and 315 or the plurality of horizontal electrodes 360, 362, 364, 370, 372 and 374, and the plurality of vertical electrodes 310 may be used. , 315 or the plurality of horizontal electrodes 360, 362, 364, 370, 372, and 374.

The plurality of dummy electrodes 320, 322, 324 are electrically insulated from each other, the plurality of vertical electrodes 310, 315, the plurality of horizontal electrodes 360, 362, 364, 370, 372, 374, and the plurality of interiors. It is electrically insulated from the wiring 380 and can be formed on the same layer as these electrodes and wiring.

Electrodes, wirings, and the like formed in the contact detection region according to the present embodiment may be formed on the same layer. In such single layer electrode patterns, short circuits may occur between electrodes connected to different channels due to poor etching or inflow of foreign matter. When the distance between electrodes is increased to prevent a short circuit, the visibility is deteriorated due to the difference in transmittance between the etching portion and the non-etching portion (electrode, etc.).

The dummy electrode according to the present exemplary embodiment may be disposed between adjacent electrodes to reduce visibility of the pattern due to a difference in transmittance between the etching portion and the non-etching portion, thereby improving visibility. In addition, as shown in FIG. 17, the dummy electrode may prevent a short circuit between electrodes connected to different channels, even if the non-etched portion 330 or the foreign substance 332 is introduced. Such channel short circuit protection serves as a buffer of defects and can significantly reduce the defect rate.

Preferably, the plurality of dummy electrodes 320, 322, and 324 are transparent materials, and in particular, the dummy electrodes 320, 322, and 324 preferably have the same transmittances as the horizontal and vertical electrodes in order to improve visibility. In order to simplify the manufacturing process, the plurality of dummy electrodes 320, 322, and 324 are made of the same material as the vertical and horizontal electrodes, and are preferably formed by the same process.

The dummy electrode may be disposed between the electrodes, for example, between adjacent vertical electrodes 320, between adjacent vertical and horizontal electrodes 322, or between adjacent horizontal electrodes 324 to improve visibility. .

When the vertical electrode, which occupies a relatively larger area than the horizontal electrode, is short-circuited with the electrode of another channel, the sensing ability of the touch sensing panel may be greatly affected. In order to simplify the manufacturing process, dummy electrodes may be disposed only between adjacent vertical electrodes or between adjacent vertical electrodes and horizontal electrodes.

As the size of the dummy electrode becomes larger, the electrode area becomes smaller, so that the area of the dummy electrode, in particular the width 328 of the dummy electrode, preferably has an upper limit value in order to maintain the sensing accuracy or the detection resolution of a predetermined value or more.

The width 328 of the dummy electrode is dependent on the gap between adjacent longitudinal electrodes or the gap between adjacent longitudinal and transverse electrodes. It is preferable that the gap between the pile pile electrodes (vertical or horizontal electrodes) is larger than the average size of the foreign matter. When the size of the introduced foreign matter follows the normal distribution, it is preferable to set the size of the foreign matter corresponding to any particular probability of the normal distribution as the maximum value of the gap between the non-dummy electrodes. As described with reference to FIG. 4, the gap between the dummy electrodes may be determined by the shape or average width of the vertical or horizontal electrodes, or may be determined by the size of the foreign matter.

If the gap between the dummy electrode and the dummy electrode is too small, the defect rate of the process may increase, and the dummy electrode and the dummy electrode may be short-circuited, and further, adjacent dummy electrodes may be short-circuited, so it is desirable to have a minimum value. It is particularly preferable that the minimum value is 10 um.

If the gap between the dummy electrode and the dummy electrode is too large, visibility, detection resolution, detection accuracy, and the like may deteriorate, and it is desirable to have a maximum value. It is especially preferable that the maximum value is 50 μm.

The gap between the adjacent dummy electrodes may be determined by at least one of the shapes of the adjacent dummy electrodes, the average spacing or distribution probability of the foreign substances introduced therein, and the process failure rate (such as a defective etching).

18 is a layout view of electrodes illustrating a portion of a contact detection area according to an exemplary embodiment of the present invention. 19 is a structural diagram illustrating a part of the vertical electrode according to FIG. 18. 20 is a structural diagram illustrating another embodiment of the vertical electrode of FIG. 18.

Referring to FIG. 18, the contact detection area according to the present exemplary embodiment may include a plurality of vertical electrodes 410 and 415, a plurality of horizontal electrodes 460, 462 and 470, and a plurality of dummy electrodes 420 and 422. Can be. The electrode pattern according to the present embodiment may be repeated in the horizontal axis or vertical axis direction.

The plurality of vertical electrodes 410 and 415 extend in the vertical direction and may be disposed in the plurality of horizontal positions to form part of the sensing area independently or together with other electrodes. The plurality of vertical electrodes 410 and 415 may be substantially transparent and formed of a conductive material.

The vertical electrode may include a plurality of protrusions 412 and 413 on the other side of the adjacent vertical electrode. The plurality of protrusions 412 and 413 may have a bar type shape as shown in the drawings, but are not limited thereto.

The first protrusion 412 may have a first angle 451 based on the vertical electrode 420, and the second protrusion 413 adjacent to the first protrusion 412 may have a second angle 455. Can be. The sum of the first and second angles 45, 455 may be substantially 180 degrees. The first and second protrusions 412 and 413 may be repeated in the vertical direction.

One end of the plurality of protrusions may be connected to the vertical electrode and the other end may be in an open shape. As shown in FIG. 18, the other end of the protrusion may have a shape cut perpendicularly to the stretching direction, and may be parallel to the vertical electrode as illustrated in FIG. 20, but is not limited thereto.

The vertical electrode may include a plurality of refractive portions 451, 452, 453, 454, 455, 456, 457, and 458 on the other side of the adjacent vertical electrode. Consecutive angles of the plurality of refractions may be repetitions of a predetermined finite sequence. The predetermined finite sequence may have only 90 degrees as shown in FIG. 12, or 120 degrees as shown in FIGS. 11 and 13, and the first acute angles 451, 90 degrees 452, and 90 degrees as shown in FIG. 19 according to the present embodiment. (453), a first obtuse angle 454 that is flat with the first acute angle 451, a second obtuse angle 455, 90 degrees 456, 90 degrees 457, and a second angle that is flat with the second obtuse angle 454. The two acute angles 458 may be elements.

The plurality of horizontal electrodes 460, 462, 470 may be disposed to be adjacent to the plurality of vertical electrodes 410, 415 to form part of the sensing area independently or together with other electrodes. The plurality of horizontal electrodes 460, 462, and 470 may be formed on the same layer as the plurality of vertical electrodes 410 and 415. The plurality of horizontal electrodes 460, 462, and 470 may be formed of the same material as the plurality of vertical electrodes 410 and 415, and may be formed by the same manufacturing process as the plurality of vertical electrodes 410 and 415.

In this embodiment, orthogonal projections on the longitudinal axis of the first horizontal electrode 460 located in a specific column and orthogonal projections on the longitudinal axis of the second horizontal electrode 470 located in another column may partially overlap. As described above with reference to FIG. 8, various overlapping sensing regions may be formed to improve sensing resolution and linearity.

The horizontal electrode 460 may include at least one recess. The recess may have a shape corresponding to the protrusion of the adjacent vertical electrode. The number of recesses in the horizontal electrode may correspond to the length of the horizontal electrode. That is, it may correspond to the number of protrusions with adjacent vertical electrodes, and may include a plurality of recesses 482 and 483 as in this embodiment.

The plurality of dummy electrodes 420 and 422 are electrically insulated from each other and electrically insulated from the plurality of vertical electrodes 410 and 415 and the plurality of horizontal electrodes 460, 462 and 470, and formed on the same layer as these electrodes. Can be.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

100: touch sensing panel 110: substrate
112: cover glass 120: contact detection area
130: wiring area 135: bus line (channel)
141: extension line 143, 145: extension line

Claims (17)

A contact detection region formed on one surface of the substrate as a single layer and forming a plurality of sensing regions in which capacitance change occurs due to user contact; And
An external wiring region disposed on one surface of the substrate and provided outside the contact detection region;
The contact detection area,
A plurality of vertical electrodes extending to the external wiring region and arranged on a plurality of vertical axes, each vertical electrode having a plurality of sensing sectors;
A plurality of patches of conductive material, forming a portion of the sensing region and arranged adjacent to the plurality of vertical electrodes, each patch being a horizontal electrode of any one of a plurality of horizontal electrodes arranged on a plurality of horizontal axes. Part of the plurality of patches; And
A plurality of dummy electrodes electrically insulated from at least some of the plurality of vertical electrodes and the plurality of patches, each dummy electrode including the plurality of dummy electrodes insulated from each other,
First and second horizontal electrodes of the plurality of horizontal electrodes are disposed on a first horizontal axis,
A first sensing sector of the plurality of sensing sectors of the first vertical electrode of the plurality of vertical electrodes is disposed between the first patch constituting the first electrode and the second patch constituting the second horizontal electrode, Forming a first patch and a first sensing region, forming a second patch and a second sensing region,
The first and second patches are adjacent to each other and face each other,
And at least a portion of the first and second sensing regions overlap. The method of claim 1,
A plurality of internal wires connected to each of the plurality of patches and extending to the external wiring area,
Each of the internal wirings of the plurality of internal wirings includes a first portion on the contact detection region and a second portion on the external wiring region,
The external wiring area includes a plurality of first external wires connected to internal wires connected to patches of the first electrode and a plurality of second external wires connected to internal wires connected to patches of the second electrode. A touch sensing panel comprising an external wiring of the same. The method of claim 2,
The substrate is a transparent window,
At least one of the plurality of vertical electrodes, the plurality of horizontal electrodes, and the plurality of internal wirings is formed integrally with the transparent window. The method of claim 1,
And a second vertical electrode of the plurality of vertical electrodes is adjacent to the first vertical electrode and disposed between the first and second patches. The method of claim 4, wherein
Patches of the first horizontal electrode and the patches of the second horizontal electrode are alternately disposed along the first horizontal axis,
The third patch of the first horizontal electrode is adjacent to each other and partially facing each other,
A third vertical electrode of the plurality of vertical electrodes is adjacent to the second vertical electrode,
The second and third patches are disposed between the second and third vertical electrodes,
And the second and third vertical electrodes are electrically connected to each other. The method of claim 1,
At least one dummy electrode of the plurality of dummy electrodes is disposed between adjacent patches among the plurality of patches, between vertical electrodes adjacent to each other among the plurality of vertical electrodes, and one of the plurality of vertical electrodes adjacent to each other and the plurality of dummy electrodes. A touch sensing panel disposed between at least one of any one of the patches. The method of claim 1,
The distance between the at least one dummy electrode adjacent to each other and any one of the plurality of patches, or the distance between the at least one dummy electrode and the vertical electrode adjacent to each other is 10μm to 50μm. The method of claim 1,
At least one of an interval between adjacent patches among the plurality of patches, an interval between adjacent vertical electrodes among the plurality of vertical electrodes, and an interval between any one of the plurality of vertical electrodes adjacent to each other and one of the plurality of patches. Either gap is substantially constant, the touch sensing panel. The method of claim 8,
The lower limit width of the at least one gap is determined by the size of the foreign matter introduced during the touch sensing panel manufacturing process. The method of claim 8,
The upper limit width of the at least one interval is determined by the average width of the plurality of patches or the average width of the plurality of vertical electrodes. The method of claim 1,
The length of the first dummy electrode or the distance between the first dummy electrode and the second dummy electrode adjacent to the first dummy electrode among the plurality of dummy electrodes may be a distance between foreign substances introduced during the touch sensing panel manufacturing process. And at least one of a distribution probability of the foreign matter and a shape of the first or second dummy electrode. The method of claim 1,
At least one of the plurality of vertical electrodes includes a plurality of protrusions. 13. The method of claim 12,
And a patch adjacent to at least one of the plurality of protrusions comprises at least one recess corresponding to the at least one protrusion. 13. The method of claim 12,
The plurality of protrusions includes a first protrusion of bar type and a second protrusion of bar type adjacent to the first protrusion,
Based on one of the plurality of vertical electrodes, the first protrusion has a slope of a first angle, and the second protrusion has a slope of a second angle,
Wherein the sum of the first and second angles is substantially 180 degrees. The method of claim 1,
The shape of one end of at least one of the plurality of vertical electrodes includes a plurality of refractive portions,
A series of angles of the plurality of refraction portions are repeated a predetermined finite sequence,
The finite sequence is a first obtuse angle, 90 degrees, 90 degrees, the first acute angle, the second acute angle, the sum of the first obtuse angle is 180 degrees, the second acute angle 90 degrees, 90 degrees, the second sum of the second acute angle is 180 degrees Consists of obtuse angle, touch sensing panel. The method of claim 1,
And a shielding layer disposed for electrical shielding on the contact detection region. A display device comprising the touch sensing panel of claim 1.

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