TWI646453B - Touch display panel - Google Patents

Abstract

A touch display panel has a display area and a non-display area surrounding the display area. The touch display panel includes a first substrate, a second substrate, a plurality of active components, a frame adhesive, a touch electrode, a conductive layer, and at least one padding structure. The active component is located in the display area. The frame is located in the non-display area and surrounds the display area. The cushion structure is disposed between the active element and the frame rubber, and the cushion structure has a distance from the frame rubber. The pitch is essentially fixed.

Description

Touch display panel

The present invention relates to a display panel, and in particular to a touch display panel.

According to the relative positions of the touch electrodes and the display panel, the touch display panel can be roughly divided into an out-cell, an on-cell, and an in-cell. Compared with external touch-type and integrated touch-control display panels, built-in touch-control display devices have the advantage of being easily thinned, so they are widely used in various electronic products.

At present, when the conventional built-in touch display panel integrates the signals of the touch electrodes and the pixel electrodes on the opposite substrate to the same substrate, it is easy to cause the The contact area of the control electrode is too small, which increases the resistance value and reduces the touch effect. Therefore, a touch display panel capable of increasing the contact area between the conductive layer and the touch electrode is a problem that needs to be solved in the technical field.

The invention provides a touch display panel, which can increase the contact area between the touch electrodes of the touch panel and the conductive layer of the display panel, and reduce the impedance.

The touch display panel of the present invention has a display area and a non-display area surrounding the display area. The touch display panel includes a first substrate, a second substrate, a plurality of active components, a frame adhesive, a touch electrode, a conductive layer, and at least one padding structure. The second substrate is disposed opposite the first substrate. These active devices are located between the first substrate and the second substrate and are located in the display area. The frame adhesive is disposed between the first substrate and the second substrate and is located in the non-display area, and the frame adhesive surrounds the display area. The touch electrodes are disposed on the second substrate. The conductive layer is disposed on the first substrate, and the conductive layer is electrically connected to the touch electrode. At least one padding structure is disposed between the active element and the frame rubber. The padding structure is located between the first substrate and the conductive layer or between the second substrate and the touch electrode. At least one padding structure has a distance from the frame rubber, and the distance is substantially fixed.

In one embodiment of the present invention, the at least one padding structure surrounds the display area.

In an embodiment of the invention, the at least one padding structure is a continuous or discontinuous pattern.

In an embodiment of the present invention, the at least one cushion structure includes at least a first ring structure and at least a second ring structure. The at least one first ring structure and the sealant have a first distance x. At least one second ring structure has a second distance y from the sealant. Both x and y are essentially fixed and x ≠ y.

In an embodiment of the present invention, the touch display panel further includes at least one signal connection pad. At least one signal connection pad is electrically connected to the conductive layer. At least one signal connection pad is disposed on the first substrate and located on a side of the frame adhesive away from the display area.

In an embodiment of the present invention, the at least one height-increasing structure and the frame rubber are in a concentric ring shape and surround the display area.

In an embodiment of the present invention, the at least one elevated structure is an elongated structure.

In an embodiment of the present invention, the at least one padding structure is located between the second substrate and the touch electrode, and the at least one padding structure has a first surface closest to the second substrate. The sealant has a second surface closest to the second substrate. The height of the first surface is greater than or substantially equal to the height of the second surface.

In an embodiment of the present invention, the at least one padding structure is located between the first substrate and the conductive layer, and the conductive layer covering the at least one padding structure has a third surface closest to the second substrate. The height of the third surface is greater than or substantially equal to the height of the second surface.

In an embodiment of the present invention, the at least one padding structure and the conductive layer are integrally formed, or the at least one padding structure and the touch electrode are integrally formed.

Based on the above, because the padding structure is disposed between the active components and the frame rubber and has a distance from the frame rubber, the distance between each padding structure and the frame rubber is substantially fixed. Therefore, the padding structure is against the The contact area of the first substrate or the second substrate can be increased. When the contact area of the padding structure is increased, the area of the conductive layer or the touch electrode provided on the padding structure will also increase, thereby increasing the contact area between the conductive layer and the touch electrode, and reducing the conductive layer and the touch electrode. Between the impedance and enhance the effect of the touch signal.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

Hereinafter, specific embodiments will be described in more detail with reference to the accompanying drawings. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the dimensions of layers and regions are exaggerated for clarity of explanation, and the same or corresponding symbols refer to the same or corresponding elements.

It should be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, and / or sections, and / Or in part should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a "first element," "component," "region," "layer," or "portion" discussed below may be termed a second element, component, region, layer, or section without departing from the teachings herein.

The terminology used herein is for the purpose of describing particular embodiments only and is not limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms including "at least one" unless the content clearly indicates otherwise. "Or" means "and / or". As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It should also be understood that when used in this specification, the terms "including" and / or "including" designate the stated features, regions, wholes, steps, operations, presence of elements and / or components, but do not exclude one or more The presence or addition of other features, areas as a whole, steps, operations, elements, components, and / or combinations thereof.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "down" may include orientations of "down" and "up", depending on the particular orientation of the drawings. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "below" may include orientations above and below.

As used herein, "about", "substantially", or "approximately" includes the stated value and the average value within an acceptable deviation range of a particular value determined by one of ordinary skill in the art, taking into account the measurements and A specific number of measurement-related errors (ie, limitations of the measurement system). For example, "substantially" may mean within one or more standard deviations of the stated value, or within ± 20%, ± 10%, ± 5%.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the related art and the present invention, and will not be interpreted as idealized or excessive Formal meaning unless explicitly defined as such in this article.

Exemplary embodiments are described herein with reference to cross-sectional views that are schematic views of idealized embodiments. Accordingly, variations in the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Therefore, the embodiments described herein should not be construed as limited to the particular shape of the area as shown herein, but include shape deviations caused by, for example, manufacturing. For example, a region shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, the acute angles shown may be round. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.

FIG. 1 is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 2A is a schematic partial cross-sectional view of the touch display panel of FIG. 1 along a section line A-A '. For the sake of clarity, FIG. 1 shows the first substrate 100, the display area AA on the first substrate 100, a non-display area BA surrounding the display area AA, a plurality of active elements T, a plurality of signal lines SL, The pad structure 500, the frame adhesive 300, and the signal connection pad 400 are omitted, and the other components of the second substrate 200 are omitted.

1 and FIG. 2A, the touch display panel 10 has a display area AA and a non-display area BA, and includes a first substrate 100, a second substrate 200 disposed opposite the first substrate 100, a plurality of active elements T, and a conductive The layer 160, a touch electrode 220, and at least one padding structure. In this embodiment, the plurality of active elements T are located between the first substrate 100 and the second substrate 200 and are located in the display area AA. The conductive layer 160 is disposed on the first substrate 100, the touch electrode 220 is disposed on the second substrate 200, and the conductive layer 160 is electrically connected to the touch electrode 220. The frame adhesive 300 is disposed between the first substrate 100 and the second substrate 200 in the non-display area BA, and the frame adhesive 300 surrounds the display area AA. Please also refer to FIG. 3B together. In this embodiment, a plurality of spacers 180 may be selectively disposed between the first substrate 100 and the second substrate 200, such as but not limited to: photo-spacer ) To form a cell gap.

Referring to FIG. 1, the touch display panel 10 has a display area AA and a non-display area BA substantially surrounding the display area AA. The ranges of the display area AA and the non-display area BA shown in FIG. 1 are exemplary, and the present invention is not limited thereto. The ranges of the display area AA and the non-display area BA may vary according to actual applications. In an embodiment of the present invention, the materials of the first substrate 100 and the second substrate 200 may be the same or different. Furthermore, the material of the second substrate 200 on which the touch electrodes 220 are formed is a light-transmitting material, and the material of the first substrate 100 is a light-transmitting or opaque / reflective material. The light-transmitting material is, for example, glass, quartz, organic polymer, or other applicable materials, and the light-opaque / reflective material is, for example, wafer, ceramic, or other applicable materials.

In this embodiment, a plurality of signal lines SL are formed on the first substrate 100 and are located in the display area AA and interlace with each other. The plurality of signal lines SL, for example, a data line, a scan line, a power supply line, or other suitable lines, or at least one of the foregoing lines may belong to different film layers, but the present invention is not limited thereto.

Please refer to FIG. 1 and FIG. 2A, a plurality of active devices T are disposed on the first substrate 100 and located in the display area AA. For example, a plurality of active elements T corresponding to a plurality of staggered signal lines SL are disposed on the first substrate 100 and are electrically connected to the plurality of signal lines SL, for example, the data line and the scanning line are electrically connected to the active element T, respectively. In this embodiment, the active device T, the first electrode 172 electrically connected to the active device T, the light emitting pattern 174 disposed on the first electrode 172, and the second electrode 176 covering the light emitting pattern 174 form a sub-pixel. 170. The active device T includes, but is not limited to, a thin film transistor, and it may include a bottom-gate, a top-gate, or a three-dimensional transistor (vertical TFT), or other suitable transistors. Transistor. Each active device T may include a gate electrode G, a semiconductor pattern CH separated from the gate insulating layer 110 and the gate electrode G, and a source S and a drain electrode D which are electrically connected to two different regions of the semiconductor pattern CH, respectively.

For example, in this embodiment, the touch display panel 10 further includes a conductive structure 112 and a first flat layer 130. The conductive structure 112 extends outward from the drain D and is electrically connected to the drain D. In this embodiment, the conductive structure 112 and the drain electrode D can be selectively formed in the same film layer, but the invention is not limited thereto. The first flat layer 130 covers the active device T and a part of the conductive structure 112. The first flat layer 130 may be a film layer having a single-layer or double-layer structure, and includes a first sub-flat layer 132 and a second sub-flat layer 134. The first electrode 172 is disposed on the first sub-flat layer 132 and is electrically connected to the conductive structure 112 through the first sub-flat layer 132. However, the present invention is not limited thereto. In other embodiments, the first electrode 172 of the sub-pixel 170 may also be electrically connected to the drain electrode D of the active device T by other methods.

In this embodiment, the second sub-flat layer 134 exposes the first electrode 172 through a first opening 136, and the first opening 136 can be used to define pixels. For example, the light-emitting pattern 174 of the sub-pixel 170 is disposed in the first opening 136 and is electrically connected to the first electrode 172. In this embodiment, the light emitting pattern 174 is, for example, an organic light emitting diode layer. The second electrode 176 of the sub-pixel 170 may be disposed on the second sub-flat layer 134 and filled in the first opening 136 to be electrically connected to the light emitting pattern 174.

Please refer to FIG. 2A. In this embodiment, the second substrate 200 is disposed opposite to the first substrate 100. The touch electrodes 220, 230, and 240 are disposed on the second substrate 200 and are located between the first substrate 100 and the second substrate 200. The touch electrodes 220, 230, and 240 are used to sense a change in capacitance caused by the touch of an object, and then determine the touch position of the object, such as a finger or a stylus. In this embodiment, the touch display panel 10 further has a second flat layer 210. The second flat layer 210 covers the touch electrodes 220 and 230 and the second substrate 200. The second flat layer 210 may be a film layer having a single-layer or double-layer structure, and includes a third sub-flat layer 212 and a fourth sub-flat layer 214. The second flat layer 210 has a second opening 216 to expose a part of the touch electrodes 230, so that the touch electrodes 240 are connected to the touch electrodes 220 and 230.

In this embodiment, the touch electrode 240 is disposed on the surface 215 of the fourth sub-flat layer, and the touch electrode 240 may extend to fill the second opening 216 of the second flat layer 210 to be electrically connected to the touch electrode 230. However, the present invention is not limited thereto. For example, the touch electrodes 220, 230, and 240 may be integrally formed. In this embodiment, based on considerations of conductivity, a material of the touch electrodes 220, 230, 240 is, for example, aluminum or silver. However, the present invention is not limited to this. The materials of the touch electrodes 220, 230, and 240 may be metals, alloys, transparent conductive oxides, or a combination of the foregoing materials, and the touch electrodes 220, 230, and 240 may have a single-layer structure. Or multilayer stack structure.

In this embodiment, the touch display panel 10 includes at least one padding structure 500. The padding structure 500 is disposed between the active element T and the frame adhesive 300 and surrounds the display area AA. In this embodiment, as shown in FIG. 2, the padding structure 500 is disposed in the non-display area BA, but the present invention is not limited thereto. The padding structure 500 may also be disposed in the display area AA. In this embodiment, the padding structure 500 is located on the first substrate 100 and between the first substrate 100 and the conductive layer 160. For example, as shown in FIG. 2, the padding structure 500 is formed on the first sub-flat layer 132 and the conductive layer 160 covers the padding structure 500. In other words, the conductive layer 160 may conformally cover the padding structure 500 and is formed between the first substrate 100 and the second substrate 200, and the conductive layer 160 is located at the top surface 502 of the padding structure 500 adjacent to the second substrate 200. It is in contact with the touch electrodes 240 to complete the electrical connection with the touch electrodes 220, 230, 240, but the invention is not limited thereto.

FIG. 2B is a schematic partial cross-sectional view of a touch display panel according to another embodiment of the present invention. Please refer to FIG. 2A and FIG. 2B together. The touch display panel 10 ′ of this embodiment is similar to the touch display panel 10 of FIG. 2A, but the main difference is that the padding structure 500 ′ of this embodiment is formed On the second substrate 200 and between the second substrate 200 and the touch electrode 240 ′. Specifically, the touch electrode 240 'conformally covers the padding structure 500' and is electrically connected to the touch electrodes 220 and 230. The conductive layer 160 is formed on the first flat layer 130, and the conductive layer 160 'is in contact with the touch electrode 240' disposed on the top surface of the pad structure 500 'adjacent to the first substrate 100. The material of the cushion structure 500 'and the spacer 180 may be the same, but the present invention is not limited thereto.

In this embodiment, the touch display panel 10 further includes at least one signal connection pad 400. Please refer to FIG. 1 and FIG. 2A. At least one signal connection pad 400 is disposed on the first substrate 100 and is located in the non-display area BA. For example, the signal connection pad 400 is located on one side of the frame adhesive 300 away from the display area AA, and is adapted to be electrically connected to the wire 120 extending from the other side of the frame adhesive 300 adjacent to the display area AA. For example, please refer to FIG. 2A. The conductive layer 160 is electrically connected to the lead 120, and extends from the side adjacent to the display area AA to the non-display area BA away from one side of the frame 300 away from the display area AA, and is electrically connected to the signal connection pad. 400.

In this embodiment, the touch display panel 10 is, for example, a top-emitting organic light emitting diode display, and the touch electrodes 220 and 230 can transmit the signal of the sensed capacitance change to the first through the touch electrode 240. On the substrate 100, the above signals are exported to the signal connection pad 400 in the non-display area BA. Therefore, the touch signal and the pixel signal can be integrated on the first substrate 100, thereby reducing the use of externally connected components, saving assembly space and reducing costs. For example, the externally connected component may be a flexible circuit board 600, which includes, for example, a driving IC 620, and a connection pad 400 for electrically connecting the signal connection pad 400 and a driving pad 640 of the driving IC 620, but is not limited thereto. The driver IC 620 may not be included, and only the pads 640 and wires to be connected as signals may be included. In addition, in this embodiment, the materials of the touch electrodes 220, 230, and 240 may be metals, alloys, transparent conductive oxides, or a combination of the foregoing materials, and the like, and the touch electrodes 220, 230, and 240 may have a single-layer structure or Multi-layer stack structure. In addition, the touch electrodes 220, 230, and 240 may be integrally formed.

3A is a schematic partial top view of a touch display panel according to an embodiment of the invention. FIG. 3B is a schematic partial cross-sectional view of the touch display panel of FIG. 3A. For the sake of clarity, FIG. 3A shows the first substrate 100, the display area AA, a non-display area BA surrounding the display area AA, a padding structure 500, and a frame 300, and the second substrate 200 and other components are omitted. Draw. In this embodiment, the height-increasing structure 500 is a discontinuous strip-shaped pattern and has a concentric ring shape with the frame adhesive 300 and surrounds the display area AA, but the invention is not limited thereto. In other embodiments, the padding structure 500 may also be a continuous pattern surrounding and surrounding the display area AA.

In this embodiment, please refer to FIG. 3A and FIG. 3B, the frame adhesive 300 surrounds the display area AA, and a plurality of spacers 180 are disposed on the first substrate 100 and located in the display area AA. In this embodiment, the plurality of padding structures 500 are disposed in the non-display area BA to surround the display area AA, but the invention is not limited thereto. The padding structure 500 may also be located at the outermost edge of the display area AA and between the display area AA and the frame 300. Please refer to FIG. 2A and FIG. 3B. In this embodiment, the sealant 300 has a second surface 302 which is one of the inner surfaces 201 closest to the second substrate 200. When the padding structure 500 is located between the first substrate 100 and the conductive layer 160, the conductive layer 160 covering the padding structure 500 has a third surface 162 closest to the second substrate 200. For example, the third surface 162 is formed on the top surface 502 of the padding structure 500 closest to the second substrate 200. As shown in FIG. 2A, the height of the third surface 162 to the first substrate 100 is substantially equal to the height of the second surface 302 to the first substrate 100, or, as shown in FIG. 3B, the height of the third surface 162 to the first substrate 100 is substantially equal to The height from the second surface 302 to the first substrate 100. Thereby, the second substrate 200 can be reliably abutted against the padding structure 500, and the electrical connection contact effect between the conductive layer 160 on the padding structure 500 and the touch electrodes 200 on the second substrate 200 can be improved. In this embodiment, the padding structure 500 and the conductive layer 160 are formed separately, but the padding structure 500 and the conductive layer 160 may be formed at the same time, that is, the padding structure 500 and the conductive layer 160 are integrally formed.

3C is a schematic partial cross-sectional view of a touch display panel according to another embodiment of the present invention. Please refer to FIG. 3B and FIG. 3C together. The touch display panel 10 ′ of this embodiment is similar to the touch display panel 10 of FIG. 3B, but the main difference is that the padding structure 500 ′ of this embodiment is formed. On the second substrate 200 and between the second substrate 200 and the touch electrode 240 ′. Specifically, the padding structure 500 ′ has a first surface 503 closest to the second substrate 200, and the height from the first surface 503 to the first substrate 100 is greater than or substantially equal to the height from the second surface 302 to the first substrate 100. . For example, the first surface 503 of the padding structure 500 'may be, for example, a surface of the padding structure 500' near the second substrate 200. Since the height of the first surface 503 is greater than or substantially equal to the height of the frame adhesive 300 closest to the second surface 302 of the second substrate 200, the padding structure 500 'can reliably abut the first substrate 100 and the second The substrate 200 improves the reliability of the electrical connection between the touch electrodes 240 ′ on the padding structure 500 ′ and the conductive layer 160 ′ on the first substrate 100. In this embodiment, the padding structure 500 'and the touch electrode 240' are formed separately, but the padding structure 500 'and the touch electrode 240' can also be formed at the same time, that is, the padding structure 500 'and the touch electrode 240' are Integrated.

FIG. 3D is a partially enlarged schematic diagram of the touch display panel shown in a region R in FIG. 3A. It should be mentioned that, please refer to FIG. 3A, FIG. 3B and FIG. 3D. In this embodiment, the padding structures 500 are long structures, and the distance k1 between each padding structure 500 and the frame rubber 300 is substantially equal. For example, please refer to FIG. 2A and FIG. 3D. In this embodiment, the distance k1 is the distance from the side of the padding structure 500 closest to the frame rubber 300 to the frame rubber 300. Because each of the padding structures 500 and the frame adhesive 300 are arranged at substantially equal distances, in other words, each of the padding structures 500 is located at a position close to a cell gap, so the conductive layer 160 and the touch electrodes on the padding structure 500 can be improved. 240 contact area and increase the effect of touch signals.

It should be noted that the padding structure 500 of the embodiment of the present invention is preferably a long strip, but the present invention is not limited thereto. When the padding structure 500 is elongated, the contact area between the padding structure 500 and the conductive layer 160 on the padding structure 500 and the touch electrode 240 can be increased, thereby reducing the contact between the conductive layer 160 and the touch electrode 240. Impedance to increase the effect of touch signals.

It must be noted here that the following embodiments follow the component numbers and parts of the previous embodiments, in which the same reference numerals are used to indicate the same or similar components. For the description of parts that omit the same technical content, refer to the foregoing embodiments. The details are not repeated in the following embodiments.

FIG. 4 is a schematic partial top view of a touch display panel according to another embodiment of the present invention. Please refer to FIG. 3A and FIG. 4 together. The touch display panel 10 ″ in this embodiment is similar to the touch display panel 10 in FIG. 3A, but the main difference is that in this embodiment, the padding structure 500 "includes a plurality of first ring structures 510 and a plurality of second ring structures 520. Specifically, compared to the second ring structure 520, the first ring structure 510 is adjacent to the display area AA, and a side of each first ring structure 510 closest to the frame rubber 300 has a first distance from the frame rubber 300. x (for example, distance d1). Compared to the first ring structure 510, the side of each second ring structure 520 closest to the frame rubber 300 has a second distance y (for example, distance d2) from the frame rubber 300, and x and y are substantially Define 値 and x ≠ y. In this embodiment, the first distance x is greater than the second distance y, that is, the distance d1 between each first annular structure 510 and the frame rubber 300 is greater than the distance between each second annular structure 520 and the frame rubber 300. Distance d2, but the present invention is not limited to this. Under this setting, the frame rubber 300 and the display area AA include a plurality of first ring structures 510 and a second ring structure 520 that are arranged along the edge of the display area AA and are concentric with the frame rubber 300, so it can effectively Increase the number of padding structures 500 ", and the contact area of the conductive layer 160 (shown in Figure 2A) on the padding structure 500" and the touch electrode 240 can be increased, thereby reducing the conductive layer 160 and the touch electrode The impedance between 240 increases the effect of the touch signal. In addition, in this embodiment, only the first ring structure 510 and the second ring structure 520 with two concentric rings are selectively included, but the present invention is not limited to this, and more can be designed according to actual needs. The concentric ring structure (eg, three, four, or more turns) of the ring to further increase the reliability of the electrical connection between the conductive layer 160 and the touch electrode 240.

FIG. 5A is a schematic partial top view of a touch display panel according to another embodiment of the present invention. Please refer to FIG. 3A and FIG. 5A together. The touch display panel 10a of this embodiment is similar to the touch display panel 10 of FIG. 3A, but the main difference is that the padding structure 500a of this embodiment is continuous It is in a pattern and has a concentric ring shape with the frame adhesive 300 and surrounds the display area AA. Under the above configuration, the padding structure 500a has a continuous strip-like structure. Compared with a discontinuous pattern, it can further increase the contact area and reduce the conductive layer (not shown) and the touch electrode (not shown). The impedance between them increases the effect of the touch signal.

FIG. 5B is a schematic partial top view of a touch display panel according to another embodiment of the present invention. Please refer to FIG. 3A and FIG. 5B together. The touch display panel 10b of this embodiment is similar to the touch display panel 10 of FIG. 3A, but the main difference is that the padding structure 500b of this embodiment is continuous Pattern, and the shape of the padding structure 500b in a plan view is a ring-shaped rectangle. Specifically, the shapes of the padding structure 500b and the frame rubber 300b are annular rectangles in a plan view, and the padding structure 500b and the frame rubber 300b are in a concentric ring shape and surround the display area AA. With the above configuration, the contact area can be further increased, the impedance between the conductive layer and the touch electrode can be reduced, and the effect of the touch signal can be increased.

In summary, a touch display panel according to an embodiment of the present invention includes a first substrate, a second substrate disposed opposite the first substrate, a plurality of active elements, a conductive layer disposed on the first substrate, and a second substrate disposed on the second substrate. The touch electrode, the frame adhesive, and at least one padding structure are located between the first substrate and the conductive layer or between the second substrate and the touch electrode. The padding structure is disposed between the active components and the frame rubber with a distance from the frame rubber. Since the distance between each padding structure and the frame rubber is substantially fixed, each padding structure is located close to the cell gap. Therefore, the contact area between the pad structure and the second substrate or the first substrate can be increased. When the contact area of the padding structure is increased, the contact area where the conductive layer is electrically connected to the touch electrode is also increased, thereby reducing the impedance between the conductive layer and the touch electrode, and increasing the effect of the touch signal. In addition, when the padding structure is a continuous pattern or a long shape in a plan view, the contact area can be further increased, the impedance between the conductive layer and the touch electrode can be reduced, and the effect of the touch signal can be improved.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

10, 10 ’, 10’ ’, 10a, 10b‧‧‧ touch display panel

100‧‧‧first substrate

110‧‧‧Gate insulation

112‧‧‧ conductive structure

120‧‧‧Wire

130‧‧‧ the first flat layer

132‧‧‧ the first child flat layer

134‧‧‧second child flat layer

136‧‧‧First opening

160、160’‧‧‧conductive layer

162‧‧‧ Third surface

170‧‧‧ sub pixels

172‧‧‧First electrode

174‧‧‧lighting pattern

176‧‧‧Second electrode

180‧‧‧ Spacer

200‧‧‧ second substrate

201‧‧‧ inside

210‧‧‧ second flat layer

212‧‧‧ third sub-flat layer

214‧‧‧Fourth child flat layer

215‧‧‧ surface

216‧‧‧Second opening

220, 230, 240, 240’‧‧‧ touch electrodes

300, 300b‧‧‧Frame glue

302‧‧‧Second surface

400‧‧‧Signal connection pad

500, 500 ’, 500’ ’, 500a, 500b ‧‧‧ padding structure

501‧‧‧ underside

502‧‧‧Top

503‧‧‧first surface

510‧‧‧first ring structure

520‧‧‧Second ring structure

600‧‧‧ flexible circuit board

620‧‧‧Driver IC

640‧‧‧ pad

AA‧‧‧Display Area

A-A’‧‧‧ hatching

BA‧‧‧ Non-display area

CH‧‧‧Semiconductor pattern

D‧‧‧ Drain

d1, d2, k1‧‧‧ distance

G‧‧‧Gate

R‧‧‧ area

S‧‧‧Source

SL‧‧‧Signal line

T‧‧‧active element

x‧‧‧first pitch

y‧‧‧second distance

FIG. 1 is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 2A is a schematic partial cross-sectional view of the touch display panel of FIG. 1 along a section line A-A '. FIG. 2B is a schematic partial cross-sectional view of a touch display panel according to another embodiment of the present invention. 3A is a schematic partial top view of a touch display panel according to an embodiment of the invention. FIG. 3B is a schematic partial cross-sectional view of the touch display panel of FIG. 3A. 3C is a schematic partial cross-sectional view of a touch display panel according to another embodiment of the present invention. FIG. 3D is a partially enlarged schematic diagram of the touch display panel shown in a region R in FIG. 3A. FIG. 4 is a schematic partial top view of a touch display panel according to another embodiment of the present invention. FIG. 5A is a schematic partial top view of a touch display panel according to another embodiment of the present invention. FIG. 5B is a schematic partial top view of a touch display panel according to another embodiment of the present invention.

Claims (10)

A touch display panel has a display area and a non-display area surrounding the display area. The touch display panel includes: a first substrate; a second substrate disposed opposite the first substrate; a plurality of active The component is located between the first substrate and the second substrate and is located in the display area; a frame adhesive is disposed between the first substrate and the second substrate and is located in the non-display area, and the frame adhesive surrounds the display Area; a touch electrode provided on the second substrate; a conductive layer provided on the first substrate, the conductive layer electrically connected to the touch electrode; and at least one padding structure provided on the active substrates Between the element and the sealant, the padding structure is located between the first substrate and the conductive layer or between the second substrate and the touch electrode, wherein the at least one padding structure has a distance from the sealant. The distance is substantially constant. The touch display panel according to item 1 of the scope of patent application, wherein the at least one padding structure surrounds the display area. The touch display panel according to item 2 of the scope of patent application, wherein the at least one padding structure is a continuous or discontinuous pattern. The touch display panel according to item 3 of the scope of patent application, wherein the at least one cushion structure includes at least a first ring structure and at least a second ring structure, the at least one first ring structure and the frame The glue has a first distance x, and the at least one second ring structure and the frame glue have a second distance y. Both x and y are substantially constant and x ≠ y. The touch display panel according to item 1 of the scope of patent application, further comprising: at least one signal connection pad electrically connected to the conductive layer. The at least one signal connection pad is disposed on the first substrate and located away from the frame adhesive. One side of the display area. The touch display panel according to item 2 of the scope of patent application, wherein the at least one padding structure and the frame rubber form a concentric ring and surround the display area. The touch display panel according to item 1 of the scope of patent application, wherein the at least one padding structure is a strip-shaped structure. The touch display panel according to item 1 of the patent application scope, wherein the at least one padding structure is located between the second substrate and the touch electrode, and the at least one padding structure has a position closest to the second substrate. A first surface, the sealant has a second surface closest to the second substrate, and the height of the first surface is greater than or substantially equal to the height of the second surface. The touch display panel according to item 1 of the scope of patent application, wherein the at least one pad structure is located between the first substrate and the conductive layer, and the conductive layer covering the at least one pad structure has the closest One of the third surfaces of the second substrate, the sealant has a second surface closest to the second substrate, and the height of the third surface is greater than or substantially equal to the height of the second surface. The touch display panel according to item 1 of the scope of patent application, wherein the at least one padding structure is integrally formed with the conductive layer, or the at least one padding structure is integrally formed with the touch electrode.