TWI545473B - Touch screen panel - Google Patents

Description

Touch screen panel [Priority Notice]

This application declares an application filed in the Korean Intellectual Property Office on August 19, 2010, and its official application is in the order of No. 10-2010-0080442 and submitted on January 18, 2011 at the Korean Intellectual Property Office. The priority and advantages of the present application are hereby incorporated by reference.

Embodiments relate to a touch screen panel provided in an image display device.

The touch screen panel is an input device. The touch screen panel allows a person to select an instruction by his/her finger or tool. The touch screen panel also allows people to enter user commands. This command is displayed on the screen of the image display device.

A touch screen panel is provided on the front side of the image display device. The touch screen panel converts the position of the contacts on the screen into electrical signals from a finger or tool that directly contacts the screen. Therefore, the command selected at the contact position is input to the device as an input signal.

Touch screen panels may increase the range of applications because touch screen panels can replace separate input devices. The separate input device can be a keyboard and a mouse coupled to the image display device.

Known touch screen panels include a resistive touch screen panel, a capacitive touch screen panel, and an infrared touch screen panel.

The capacitive touch screen panel converts the contact position into an electrical signal by sensing changes in electrostatic capacitance. The change in electrostatic capacitance is produced by a conductive sensing pattern coupled to other sensing pattern electrodes or ground electrodes. When a finger or other object touches the touch screen panel, a conductive sensing pattern that is coupled to other sensing pattern electrodes or ground electrodes occurs.

The capacitive touch screen panel includes a plurality of sensing patterns connected to each other in a first direction and a plurality of sensing patterns connected to each other in a second direction crossing the first direction to obtain coordinates of the contact position.

In a normal image display device, the lateral length is different from the longitudinal length such that the touch sensitivity in the first direction may be different from the touch sensitivity in the second direction.

In a normal image display device, the touch sensitivity is determined by the ratio between the basic capacitance and the touch capacitance. When the basic capacitance is small and the touch capacitance is large, the touch sensitivity is improved. Therefore, when the lateral length of the screen is different from the longitudinal length, the sensing patterns in the long sides are connected to each other more than the sensing pattern in the short side.

Therefore, the basic capacitance is increased, so that the touch sensitivity is lowered.

The embodiment thus is directed to a touch screen panel that substantially overcomes one or more problems due to the limitations and disadvantages of the related art.

Therefore, when the first sensing patterns arranged in the same layer are arranged in the first direction, the second sensing patterns are arranged in the second direction, and the bridge pattern for connecting the first or second sensing patterns to each other is formed A feature of the embodiment is to provide a touch screen panel for improving touch sensitivity by making a region of the first sensing pattern different from a region of the second sensing pattern.

Therefore, another feature of the embodiment is to provide a touch screen panel, wherein the touch screen panel is positioned on an upper substrate of a display panel for forming a flat display device, and is formed in the touch screen panel and the bridge pattern. The vertical/horizontal edge elements of the first and second sensing patterns are tilted by a predetermined angle such that sensing pattern interference of pixels having display areas on the display area of the flat panel display panel in stripe form can be avoided to improve visibility .

Therefore, another feature of an embodiment is to provide a touch screen panel in which a dummy pattern is formed between the first and second adjacent sensing patterns, and the virtual pattern structure is optimized to improve pixels corresponding to the dummy pattern. Visibility.

At least one of the above features or advantages may be realized by providing a touch screen panel comprising: a plurality of first sensing patterns connected to each other in a longitudinal direction of the screen, wherein the plurality of The first sensing pattern has at least one retracting unit that is inwardly retracted from each side of the polygon; and a plurality of second sensing patterns that are connected to each other in a short side direction of the screen, wherein the second sensing pattern has At least one protrusion protruding outward from each side of the polygon, wherein the vertical and horizontal edges of the first sensing pattern and the second sensing pattern are inclined by a predetermined angle.

In addition, the first sensing pattern or the second sensing pattern is electrically connected to the adjacent sensing pattern on the same route by the bridge pattern, and the bridge pattern is by excluding the vertical and horizontal directions. Arranged diagonally.

At this time, the bridge pattern is made of a low resistance opaque metal, and the first sensing pattern and the second sensing pattern are made of a transparent conductive material.

In addition, the touch screen panel further includes a plurality of island virtual patterns between the first sensing pattern and the second sensing pattern, and the virtual pattern is composed of the first sensing pattern and the second feeling It is made of a transparent conductive material with the same pattern.

Further, the predetermined angle ranges from 2 degrees to 10 degrees, and at least one protrusion of the second sensing pattern includes a plurality of protrusions, at least one retracting unit of the first sensing pattern includes a plurality of retracting units, and The protrusion of the second sensing pattern is positioned in a space created by the retracting unit of the first sensing pattern.

At least one of the above or other features and advantages can also be achieved by providing the first sensing pattern and the second sensing pattern on an upper substrate of a flat panel display panel, and in more detail, the first sensing pattern and The second sensing pattern is formed in an area where the first and second sensing patterns overlap with a plurality of pixels, wherein the plurality of pixels are provided in a pixel area of the flat panel display panel, and the pitch of the pixels is not by any The pitch of the plurality of first and second sensing patterns due to a factor of an integer.

The touch screen panel may further include a dummy pattern formed between the first sensing pattern and the second sensing pattern, and the dummy pattern is the same as the first sensing pattern and the second sensing pattern Made of transparent conductive material.

The virtual pattern may include a plurality of island virtual patterns, and horizontal edge units and/or vertical edge units of the plurality of virtual patterns are implemented such that the length of the horizontal edge unit and/or the vertical edge unit overlapping the plurality of pixels is minimum of.

The horizontal edge unit and/or the vertical edge unit of the dummy pattern, the first sensing pattern and the second sensing pattern have an angle of about 10 to 80 degrees with respect to an arrangement direction of the pixel, and the dummy pattern has a polygonal shape shape.

The dummy pattern is formed to be coupled to each other between the first sensing pattern and the second sensing pattern.

10‧‧‧Transparent substrate

12a‧‧‧First sensing pattern

12a1‧‧‧indentation unit

12b‧‧‧Second sensing pattern

12b1‧‧‧ Protrusion

12c1‧‧‧ vertical edge

12c2‧‧‧ horizontal edge

14‧‧‧ Bridge pattern

15‧‧‧ position sensing line

16, 16a, 16a'‧‧‧ virtual patterns

20‧‧‧Cushion unit

22‧‧‧ pixels

The above-described features and advantages will be more apparent to those of ordinary skill in the art in view of the description in the exemplary embodiments of the drawings, wherein: 1 illustrates a main plan view of a touch screen panel according to an embodiment; FIG. 2A illustrates a main plan view of a first sensing pattern and a second sensing pattern according to an embodiment; FIG. 2B illustrates an enlargement of a specific portion of FIG. 2A 3A and 3B illustrate views of the shape of the edge unit of the sensing pattern of FIG. 2; FIGS. 4A and 4B illustrate cross-sectional views of the structure of the structure of the dummy pattern according to another embodiment; and FIG. 5 illustrates A cross-sectional view of the structure of the dummy pattern of still another embodiment.

The exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, which, however,

Hereinafter, embodiments implemented by those skilled in the art can be easily described in detail with reference to FIGS. 1 to 3B.

FIG. 1 illustrates a main plan view of a touch screen panel in accordance with an embodiment.

Referring to FIG. 1, a touch screen panel according to an embodiment is a capacitive touch screen panel, and includes a transparent substrate 10, a plurality of first sensing patterns 12a, a second sensing pattern 12b and a position formed on the transparent substrate 10. Sensing line 15. The position sensing line 15 connects the first sensing pattern 12a and the second sensing pattern 12b to the external driving circuit board through the pad unit 20.

The first sensing patterns 12a are formed to be connected to each other using a transparent electrode material such as indium tin oxide (ITO) in the longitudinal direction of the screen. For example, when the long-side direction is the vertical direction (Y-axis direction), the first sensing patterns 12a are formed to be connected to each other in the column direction within the screen. The first sensing pattern 12a can be connected to each of the respective columns of cells Position sensing line 15.

When the long side direction of the screen is the horizontal direction (X-axis direction), the first sensing patterns 12a may be formed to be connected to each other. The first sensing patterns 12a may be formed to be connected to each other in a row direction within the screen. For the sake of convenience, it is assumed that the long side direction of the screen is the column direction.

The first sensing patterns 12a are patternable to be connected to each other in the column direction of the screen. The first sensing pattern 12a may also be formed to have a separated pattern. Therefore, the first sensing patterns 12a arranged in the same column can be connected to each other by a separate bridge pattern.

The second sensing pattern 12b similar to the first sensing pattern 12a is formed using a transparent electrode material. The second sensing patterns 12b are formed to be connected in the short side direction of the screen.

When the short side direction of the screen is the horizontal direction (X-axis direction), the second sensing patterns 12b may be formed to be connected to each other in the row direction within the screen. The second sensing patterns 12b may be connected to the position sensing lines 15 of each row unit, respectively.

The second sensing patterns 12b may be patterned to be connected to each other in the row direction of the screen. The second sensing pattern 12b is also formed to have a separated pattern. Therefore, the second sensing patterns 12b arranged in the same row can be connected through the separated bridge patterns.

In the present embodiment, the structure will be described as follows, in which the first sensing patterns 12a are patterned to be connected to each other in the column direction of the screen and the second sensing patterns 12b are connected to each other through the separated bridge patterns 14.

When the first sensing pattern 12a and the second sensing pattern 12b are positioned on different layers, the first sensing pattern 12a and the second sensing pattern 12b may both be patterned to be connected to each other in the column direction and the row direction, respectively. .

The position sensing line 15 connects the first sensing pattern 12a and the second sensing pattern 12b to an external driving circuit (not shown). Through the pad unit 20, the external drive circuit can be a position sensing circuit.

The position sensing line 15 can be disposed outside the screen displayed by the image. The position sensing line 15 can be made of various low-resistance materials such as molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Al), molybdenum/aluminum/molybdenum (Mo/Al/ Mo), in addition to the transparent material used to form the first and second sensing patterns 12a and 12b. The bridge pattern 14 can be made through the same process as the position sensing line 15 and the same material. When a contact object (such as a person's hand or a touch stick) contacts the touch screen panel, the capacitance changes. The change in capacitance by the contact position is transmitted from the sensing patterns 12a and 12b to the driving circuit (not shown) through the position sensing line 15 and the pad unit 20. The capacitance change is converted into an electrical signal by an X input processing circuit and a Y input processing circuit (not shown). Therefore, the contact position is obtained.

The touch screen panel can be formed on a separate substrate to be attached to the image display device. The touch screen panel can also be formed on a separate substrate to integrate with the display panel of the image display device.

The touch screen panel can be formed on the upper substrate of the organic light emitting display panel or the liquid crystal display panel. Therefore, the touch screen panel can be integrated with the display panel. When the display panel and the touch screen panel are integrated with each other, a thin image display device can be provided.

When the shape and size of the respective patterns of the first sensing pattern 12a and the second sensing pattern 12b are substantially the same, the basic capacitance in the longitudinal direction of the screen and the basic capacitance in the short-side direction of the screen are different from each other. of. Therefore, the touch sensitivity may deteriorate.

When the touch input is made to the touch screen panel, the assumed capacitance change is generated by the sense pattern of the contact. Therefore, the touch capacitance is ΔC and the basic capacitance of the sensing pattern before the touch is Cnode. Therefore, the touch sensitivity is ΔC/Cnode.

The basic capacitance is used for structural problems. Basic capacitors have the main elements, Parasitic capacitance generated between other elements of the display panel located below the touch screen panel. For example, parasitic capacitance may be generated from a cathode formed on the front surface of the organic light emitting display panel. The parasitic capacitance may also be generated by a common electrode formed on the front surface of the liquid crystal display panel. The parasitic capacitance may also be generated by the first sensing pattern 12a and the second sensing pattern 12b.

The parasitic capacitance generated between the grounded signal lines of the display panel, the first sensing pattern 12a and the second sensing pattern 12b may also be auxiliary elements of the basic capacitance.

The touch capacitor is intended to implement a touch screen panel. Therefore, it is meant that the capacitance changed by the generated touch event is used to sense the position.

Therefore, when the basic capacitance is small and the touch capacitance is large, the touch sensitivity of the touch screen panel is improved. When the first sensing patterns 12a are connected to each other in the long-side direction of the screen, they are more than the number of the second sensing patterns 12b connected to each other in the short-side direction. Therefore, the basic capacitance of the first sensing pattern 12a is greater than the basic capacitance of the second sensing pattern 12b. The touch capacitance of the first sensing pattern 12a is the same as the second sensing pattern 12b. In general, when the touch sensitivity in the long side direction of the screen is low, the overall touch sensitivity of the touch screen panel is deteriorated.

In the present embodiment, in order to prevent deterioration of the sensitivity of the touch panel, the respective areas of the first sensing patterns 12a are reduced, so that the large basic capacitance in the long side direction of the screen is reduced. In order to reduce the difference in the basic capacitance in the long side direction and the short side direction of the screen, the second sensing pattern 12b is designed to have an increased area.

The present embodiment modifies the pattern shape of the sensing pattern such that the area of the first sensing pattern 12a is smaller than the area of the second sensing pattern 12b. Modifying the pattern shape of the sensing pattern reduces the difference in basic capacitance in the long side direction and the short side direction of the screen. Therefore, the touch sensitivity of the touch screen panel can be improved.

Examples of the pattern shapes of the first sensing patterns 12a and the second sensing patterns 12b will be referred to the drawings. 2A to 3B are described.

2A is a main plan view illustrating a first sensing pattern and a second sensing pattern, according to an embodiment. Figure 2B illustrates an enlarged plane of a particular portion of Figure 2A.

As described with reference to FIG. 1, the first sensing patterns 12a are patterned to be connected to each other in the column direction (Y-axis direction) of the screen. The second sensing patterns 12b are arranged in the row direction (X-axis direction) of the screen, and are connected to each other in the column direction (Y-axis direction) in the longitudinal direction of the screen. The second sensing patterns 12b are separable from each other by the bridge pattern 14.

Referring to FIG. 2A, the first sensing pattern 12a is patterned to have at least one indentation unit 12a1 that is inwardly retracted from respective sides of the polygon (ie, inwardly patterned in a retracted shape).

The second sensing patterns 12b located adjacent to the first sensing patterns 12a are patterned to have at least one protrusion 12b1 that protrudes outward from respective sides of the polygon (ie, patterned outward in the shape of the protrusions).

The protrusion 12b1 of the second sensing pattern 12b has a shape corresponding to the retracting unit 12a1 of the first sensing pattern 12a. The projection 12b1 is positioned in a space formed by the retracting unit 12a1.

When the first sensing pattern 12a and the second sensing pattern 12b have the same diamond shape, the area of the second sensing pattern 12b is increased as much as the number of the protrusions 12b1. The area of the first sensing pattern 12a is also as much as the number of indentation units 12a1.

When the regions of the respective first sensing patterns 12a are both lowered, the respective capacitances of the respective channels in the longitudinal direction of the screen, that is, the respective channels in the column direction, are reduced to increase the touch sensitivity. The width and number of indented units of the first sensing pattern 12a that are indented inward from the respective sides can be determined experimentally, such as the reduction in the basic capacitance over the range. The range must meet the predetermined touch capacitance required for the touch screen panel.

The basic capacitance of the long side direction of the screen is lowered by lowering the area of the first sensing pattern 12a. The basic capacitance of the short side direction of the screen is increased by increasing the area of the second sensing pattern 12b. Therefore, the size of the basic capacitance in the long side direction and the short side direction of the screen may be accurately matched.

The second sensing patterns 12b are patterned to have protrusions 12b1 that protrude outward from respective sides of the polygon. The polygon may have a diamond shape. As shown in the drawing, the first sensing patterns 12a and the second sensing patterns 12b are closely positioned to each other. Therefore, the space for the increased area of the second sensing pattern 12b can be guaranteed to be as much as the area of the first sensing pattern 12.

The respective protrusions 12b1 of the second sensing patterns 12b may protrude as many as the areas corresponding to the respective retracting units 12a1 of the first sensing patterns 12a. The inwardly retracted indented unit 12a1 of the first sensing pattern 12a and the outwardly protruding protrusion of the second sensing pattern 12b may be similar or substantially identical to each other.

This embodiment is not limited to this. The area of the respective protrusions 12b1 of the second sensing patterns 12b may be smaller than the area of the respective retracting units 21a1 of the first sensing patterns 12a. In this case, the first sensing patterns 12a and the second sensing patterns 12b may be closely arranged to each other.

When there is a considerable difference between the length of the long side of the screen and the length of the short side and there is a considerable difference between the basic capacitances compared thereto, the area of the respective protrusion 12b1 of the second sensing pattern 12b may be larger than The respective regions of the first sensing pattern 12a are indented into the unit 12a1.

When the pattern shapes of the first sensing patterns 12a and the second sensing patterns 12b are changed, the basic capacitances in the long side direction (Y-axis direction) and the short side direction (X-axis direction) of the screen may match each other.

When the touch sensitivities in the long side direction and the short side direction of the screen are similar or identical to each other, errors in position sensing are reduced and accuracy is improved. Therefore, with A touch screen panel with improved touch sensitivity can be provided.

The self-driven capacitive touch screen panel is applied to voltages or currents of respective channels in the long-side direction and the short-side direction of the screen, and senses whether there is a touch event generated by measuring current or voltage. Sensing occurs when a current or voltage is applied at the location where the current or voltage is generated. Therefore, the basic capacitances in the respective directions match each other, so that errors in the sensing position are reduced, and touch sensitivity is improved.

A touch screen panel having a sensing pattern designed to the shape mentioned above is formed directly or attached to the upper substrate of the flat panel display panel. The flat panel display may be an organic light emitting display panel and a liquid crystal display panel.

The bridge pattern 14 for connecting the second sensing patterns 12b to each other is made of a low-resistance metal. The low resistance metal has opacity to block light emitted from the flat panel display panel.

The respective pixels (not shown) formed on the display area of the flat display panel are arranged in a matrix. The bridge pattern 14 can be arranged in a horizontal direction like a pixel (not shown) arranged on the display panel. When the portion of the bridge pattern 14 completely overlaps the pixels formed in the corresponding region, the light emitted from the overlapped pixels is blocked by the bridge pattern. Therefore, dark spots are produced.

To overcome dark spots, in the embodiment shown in Figure 2b, the bridge pattern 14 is obliquely aligned such that overlap with pixels (not shown) is minimized. A pixel (not shown) is formed in a region corresponding to the bridge pattern. Therefore, the dark spots mentioned above may not be generated.

In the present embodiment, the bridge patterns 14 are neither vertically nor horizontally arranged, but arranged in an inclined pattern.

The bridge pattern 14 is formed in another layer by being interposed between the second sensing patterns 12b in the insulating layer. In addition, the bridge pattern 14 is transmitted through the contact hole 15 formed in the insulating layer. The second sensing patterns 12b are electrically connected to each other to be formed.

The insulating layer may be made of yttrium oxide (SiO ₂ ) or hafnium nitride (SiN _x ) and has a refractive index different from that of the transparent conductive material. A transparent material can be used to form the insulating layer and the first and second sensing patterns.

The refractive index of cerium oxide is 1.5, and the refractive index of transparent conductive material (ITO) is 1.97. Therefore, there is a big difference between them.

In the region between the sensing patterns 12a and 12b, that is, in the region where the transparent conductive material is not formed, the difference between the refractive indices is directly apparent. The touch screen panel refracts and reflects light from the display panel and external light. Therefore, the visibility of the display device is deteriorated.

In order to solve this problem, in the embodiment shown in FIG. 2A, in the region 16 between the first sensing pattern 12a and the second sensing pattern 12b adjacent to each other, a plurality of island-shaped dummy patterns 16a may be formed. To prevent the insulation from being found.

At this time, the dummy pattern 16a is made of the same transparent conductive material as the sensing patterns 12a and 12b, and by doing so, the insulating layer is prevented from being exposed because of the refractive index between the transparent conductive material and the insulating layer. The deterioration of visibility caused by the difference can be overcome.

3A and 3B are diagrams illustrating the shape of an edge unit of the sensing pattern of Fig. 2.

FIG. 3A illustrates a problem when the edges of the sensing pattern are formed horizontally and vertically. FIG. 3B shows the edge of the sensing pattern by tilting a predetermined angle according to an embodiment.

Referring to FIG. 3A, a touch screen panel having sensing patterns 12a and 12b is designed to be directly formed or attached to the upper substrate of the flat panel display panel. The flat panel display may be an organic light emitting display panel and a liquid crystal display panel.

The sensing patterns 12a and 12b are formed in a region overlapping a plurality of pixels 22. A plurality of pixels 22 are provided in the pixel area of the flat panel display panel. When parsing for pixel 22 When the degree is high, some interference fringes may be observed on the screen. Pixel 22 is provided in the pixel area of the flat panel display. Interference fringes occur where light passes through the display panel and the touch screen panel.

The size and spacing of the pixels 22 is smaller than that of a display panel having a high resolution. Therefore, the possibility that the light emitted from the display panel is refracted or scattered is increased at the vertical edge 12c1 and the horizontal edge 12c2 of the sensing patterns 12a and 12b of the touch screen panel.

The illustration of Figures 3A through 3B has vertical and horizontal edges 12c1 and 12c2 that are refracted or scattered. In FIGS. 3A to 3B, the vertical and horizontal edges 12c1 and 12c2 of the sensing pattern correspond to the indenting unit of the first sensing pattern. However, the vertical and horizontal edges of the sensing pattern are not limited thereto. The vertical edges (parallel to the Y axis) or the horizontal edges (parallel to the X axis) of the entire edges of the first sensing patterns 12a and the second sensing patterns 12b will also be described.

The reference symbols 16a of FIGS. 3A to 3B are a plurality of island-shaped dummy patterns 16a assigned to the regions formed between the first and second sensing patterns 12a and 12b. As described in FIG. 2, the first and second sensing patterns 12a and 12b are adjacent to each other.

As shown in Figure 3A, the respective pixels 22 formed on the display panel (not shown) are rectangular. When the touch screen panel is incorporated on the display panel, there is a high probability that the columns of pixels of the display panel conform to the vertical and horizontal edges 12c1 and 12c2 of the sensing pattern of the touch screen panel at a particular position on a line. Thus, light generated from pixel 22 is refracted at the vertical and/or horizontal edges of the sensing pattern to create interference fringes.

In the present embodiment, in order to overcome the problem of the interference fringe, the vertical/horizontal edges 12c1 and 12c2 of the sensing pattern of the touch screen panel are tilted by a predetermined angle α such that the columns of the pixels 22 of the display panel (or Row) prevents alignment parallel to the vertical/horizontal edges 12c1 and 12c2. The vertical/horizontal edges 12c1 and 12c2 of the sensing pattern of the touch screen panel are as shown in FIG. 3B.

The edges 12c1 and 12c2 of the sensing pattern are inclined by a predetermined angle to eliminate vertical or horizontal portions. The tilt minimizes the pixels 22 that overlap on the edge lines and minimizes the refracted and scattered light. Therefore, defective interference fringes may be deleted.

The tilt angle α may be neither vertical nor horizontal. However, the tilt angle α may be any angle unless there is a problem in operating the touch sensor. For example, visibility may be reduced by an off-axis of about 2 to 10 degrees.

The optical interference between the sensing patterns 12a and 12b of the touch screen panel and the pixels 22 of the display panel is closely related to the pitch of the pattern. For example, when the pitch of the pixels 22 is a factor that passes through an integer, the plurality of pitches of the sensing patterns 12a and 12b, the pixels of the display panel and the sensing patterns of the touch screen panel are repeated at the same position. Therefore, interference fringes are generated and can be recognized by the human eye. Interference fringes may produce an observable optical law, a Moire pattern.

In the present embodiment, the pitch of the pixels 22 and the pitch of the sensing patterns 12a and 12b are designed to be non-transmissive to the pitch of the plurality of sensing patterns 12a and 12b, so that defective interference fringes may pass through the random The pixels of the pattern and the arrangement of the sensing patterns are removed.

However, in the embodiment shown in Figures 3A and 3B, the virtual pattern has the correct rectangle. In this case, the vertical/horizontal edge elements of the dummy pattern 16a conform to the corresponding pixel 22 (Fig. 3A) or the length is longer (Fig. 3B), wherein the length means that the vertical/horizontal edge unit of the dummy pattern 16a is Overlap with pixels.

In this case, as described above, light generated from the pixels 22 may be refracted through the vertical and/or horizontal edge cells of the dummy pattern 16a to generate interference fringes.

Thus, in another embodiment, the structure of the virtual pattern is optimized to increase the visibility of the corresponding pixel of the virtual pattern to be described.

4A and 4B illustrate cross-sectional views of the structure of a dummy pattern in accordance with another embodiment.

4A and 4B show the above-described virtual pattern of Fig. 3, i.e., in the same area of the enlarged view.

The dummy pattern 16a' according to another embodiment is as shown in FIG. The dummy pattern 16a' is implemented such that the length is minimized, wherein the vertical/horizontal edge elements of the dummy pattern 16a' overlap the pixel 22. Therefore, the dummy pattern 16a overcomes the disadvantages of the dummy pattern 16a as shown in FIG.

By the structure of the dummy pattern 16a', the overlap length of the dummy pattern having the pixels 22 is minimized, so that the interference fringes can be minimized. The interference fringes are generated by the light from the pixel 22, refracted by the edge elements of the virtual pattern.

The vertical and/or horizontal edge cells of the dummy pattern may be inclined by about 10 to 80 degrees with respect to the arrangement direction of the pixels 22 (X-axis or Y-axis).

The dummy pattern 16a' may have a triangle, a diamond, a pentagon, and a hexagon. Figure 4A shows an edge cell of a virtual pattern 16a' having a diamond shape of about 45 degrees. FIG. 4B shows a dummy pattern 16a having a triangle.

Figure 5 illustrates a cross-sectional view of the structure of a dummy pattern in accordance with still another embodiment.

Fig. 5 shows the virtual pattern area as shown in Fig. 3B, i.e., the same area in the enlarged view.

The virtual pattern 16 according to still another embodiment is as shown in FIG. The dummy pattern 16 is different from the embodiment shown in Figures 3 and 4. The dummy pattern 16 is not realized by a plurality of island-shaped dummy patterns, but is integrally connected as a single body between adjacent first and second sensing patterns 12a and 12b.

According to the dummy pattern 16 as shown in FIG. 5, the difference in refraction between the existing island-shaped dummy patterns 16a and 16a' and the scattering of light from the pixels 22 overlapping with the dummy patterns 16a and 16a' may be reduced, so that Improve visibility.

Summarizing and reviewing the related art, the first and second sensing patterns are formed on the same layer. The first sensing pattern or the second sensing pattern is typically connected to a separate low resistance metal bridge Pattern.

In the related art touch screen panel, the bridge pattern is realized by an opaque metal. Therefore, when the pixels of the image display device positioned under the touch screen panel overlap the connection pattern, the pixels are filtered.

As the resolution of image display devices is gradually increasing, the areas of the respective pixels are degraded. Therefore, the number of pixels filtered by the bridge pattern may increase. Depending on the viewing angle, the pixels filtered by the bridge pattern appear as dark spots. Therefore, the visibility of the outside is deteriorated.

According to the current embodiment, in forming the first sensing patterns arranged in the first direction, the second sensing patterns are arranged in the second direction, and the first or second sensing for connecting the same layer in the same layer The pattern of the bridge pattern of the pattern, the regions of the first sensing pattern and the second sensing pattern are different from each other. Therefore, the touch sensitivity may be improved.

Further, the vertical/horizontal edge units of the first and second sensing patterns formed on the touch screen panel are formed by being inclined by a predetermined angle such that pixels having a stripe form in the display area of the flat panel display panel are arranged. The interference of the sensing pattern can be avoided. Therefore, visibility may improve.

The structure of the dummy pattern formed in the region between the adjacent first and second sensing patterns may be optimized such that the visibility of the pixels of the corresponding dummy pattern may be improved.

The exemplary embodiments are disclosed herein, and are not intended to be in Thus, those of ordinary skill in the art will understand that various changes in form and detail can be.

12a‧‧‧First sensing pattern

12b‧‧‧Second sensing pattern

12c1‧‧‧ vertical edge

12c2‧‧‧ horizontal edge

16a‧‧‧virtual pattern

22‧‧‧ pixels

Claims (16)

A touch screen panel includes: a plurality of first sensing patterns arranged in a longitudinal direction of the screen and connected to each other, wherein the plurality of first sensing patterns have indented inward from sides of the polygon At least one retracting unit; a plurality of second sensing patterns arranged in a short side direction of the screen and connected to each other, wherein the second sensing pattern has at least one protruding outward from each side of the polygon and located at the at least one At least one protrusion in the indentation unit; an insulating layer formed on the second sensing patterns; and a plurality of bridge patterns formed by the insulating layer interposed between the second sensing patterns Formed on another layer of the second sensing patterns, and the bridge patterns are connected to the second sensing patterns by a plurality of contact holes formed in the insulating layer; and a plurality of dummy patterns, Formed between the at least one protrusion and the at least one retracting unit to cover the insulating layer exposed between the first sensing patterns and the second sensing patterns; wherein each of the first sensing patterns The area is smaller than each Patterning the second sensing area. The touch screen panel of claim 1, wherein the vertical and horizontal edges of the first sensing pattern and the second sensing pattern are inclined by a predetermined angle. The touch screen panel of claim 2, wherein the predetermined angle ranges from 2 degrees to 10 degrees. The touch screen panel according to claim 1, wherein the first sensing pattern Or the second sensing pattern is electrically connected to the adjacent sensing pattern on the same route by the bridge pattern. The touch screen panel of claim 4, wherein the bridge pattern is obliquely arranged by excluding vertical and horizontal directions. The touch screen panel of claim 4, wherein the bridge pattern is made of a low resistance opaque metal. The touch screen panel of claim 1, wherein the first sensing pattern and the second sensing pattern are made of a transparent conductive material. The touch screen panel of claim 1, wherein at least one protrusion of the second sensing pattern comprises a plurality of protrusions, at least one retracting unit of the first sensing pattern comprises a plurality of retracting units, and The protrusion of the second sensing pattern is positioned in a space created by the retracting unit of the first sensing pattern. The touch screen panel of claim 1, wherein the first sensing pattern and the second sensing pattern are on an upper substrate of the flat panel display panel. The touch screen panel of claim 9, wherein the first sensing pattern and the second sensing pattern are formed in an area where the first and second sensing patterns overlap with a plurality of pixels, wherein the plurality of pixels Pixels are provided in the pixel area of the flat panel display panel, and the pitch of the pixels is not the spacing of the plurality of first and second sensing patterns by any integer factor. The touch screen panel of claim 1, wherein the virtual patterns are made of the same transparent conductive material as the first sensing pattern and the second sensing pattern. The touch screen panel of claim 1, wherein the virtual patterns comprise a plurality of island virtual patterns. According to the touch screen panel of claim 12, wherein the virtual patterns are Horizontal edge cells and/or vertical edge cells are implemented such that the length of the horizontal edge cells and/or vertical edge cells overlapping a plurality of pixels is minimal. The touch screen panel of claim 13, wherein the horizontal edge unit and/or the vertical edge unit of the virtual patterns, the first sensing pattern and the second sensing pattern have an arrangement direction with respect to the pixel An angle of 10 to 80 degrees. The touch screen panel of claim 14, wherein the virtual patterns have a polygonal shape. The touch screen panel of claim 1, wherein the virtual patterns are coupled to each other between the first sensing pattern and the second sensing pattern.