TWM503605U - Touch display device - Google Patents

Abstract

A touch display device includes a display device, a touch sensing element and a shielding structure. The display device includes a common electrode. The touch sensing element includes a sensing electrode. The shielding structure is disposed between the common electrode and the sensing electrode, wherein a wire resistance of the shielding structure is smaller than 500 ohms.

Description

Touch display device

The present invention relates to a display device, and more particularly to a touch display device.

In recent years, touch-sensitive display devices have been widely used in a wide variety of electronic products, such as global positioning system (GPS), personal digital assistant (PDA), cellular phone, and palmtop computer ( Hand-held PCs, etc., to replace traditional input devices (such as keyboards and mice), this design has changed dramatically, which not only enhances the human-machine interface affinity of these electronic devices, but also omits the tradition. Enter the device to free up more space for installing large display panels for users to browse the data.

The touch display device includes a touch panel and a display panel disposed under the touch panel. If an Electrostatic Discharge (ESD) phenomenon occurs in the display panel, static electricity may be introduced into the display panel through the common electrode, and even damage to the driving wafer may result in poor display of the screen. In addition, for the capacitive touch display device, the electronic signal from the common electrode of the display panel may interfere with the sensing capability of the touch component of the touch panel, thereby causing misjudgment of the touch point. therefore, For a touch display device integrated with a touch panel, the noise suppression and electrostatic discharge protection effect is improved through a shielding structure disposed between the touch panel and the display panel.

The novel creation provides a touch display device in which the shielding structure improves the ability of noise suppression and electrostatic discharge protection.

The touch display device of the present invention comprises a display, a touch sensing component and a shielding structure. The display includes a common electrode. The touch sensing component includes a touch electrode. The shielding structure is disposed between the common electrode and the touch electrode, wherein the measured line impedance of the shielding structure is less than 500 ohms.

In an embodiment of the present invention, the shielding structure has a conductive layer and a connection pad, and the connection pad is disposed on one side of the conductive layer, and the measured line impedance is between the conductive layer and the connection pad. The measured maximum line impedance.

In an embodiment of the present invention, the shielding structure further includes a ring-shaped electrode disposed on a periphery of the conductive layer, and the ring-shaped electrode has a connection pad.

In an embodiment of the present invention, the impedance of the annular electrode is less than the impedance of the conductive layer.

In an embodiment of the present invention, the annular electrode is a plurality of secondary electrodes separated from each other, and the conductive layer includes a plurality of patterned electrodes separated from each other.

In an embodiment of the present invention, each of the above electrodes has a connection pad.

In an embodiment of the present invention, the measurement points measured between the conductive layer and the connection pad are at the edges of the patterned electrodes having a diagonal relationship and at the edges of the annular electrodes.

In an embodiment of the present invention, the measurement point measured between the conductive layer and the connection pad is a position of a center point of the conductive layer and a ring-shaped electrode farthest from a center point of the conductive layer.

In an embodiment of the present invention, the conductive layer is a grid electrode.

In an embodiment of the present invention, a substrate is further disposed between the common electrode and the touch electrode, wherein the shielding structure is disposed on the substrate.

In an embodiment of the present invention, the substrate comprises a polyethylene terephthalate substrate or a glass substrate.

In an embodiment of the present invention, a cover plate is further disposed, and the touch sensing component is disposed on the inner surface of the cover plate, and the cover plate covers the shielding structure and the display.

In an embodiment of the present invention, the display includes a color filter substrate, the touch sensing component is disposed on the outer surface of the color filter substrate, and the shielding structure is disposed on the inner surface of the color filter substrate, and is shielded. The structure is disposed between the common electrode and the color filter substrate.

In an embodiment of the present invention, the common electrode is disposed on the shielding structure.

In an embodiment of the present invention, the display includes a package cover The shielding member is disposed on the outer surface of the package cover, the shielding structure is disposed on the inner surface of the package cover, and the shielding structure is disposed between the common electrode and the package cover.

In an embodiment of the novel creation, the display includes a color filter The light substrate, the touch sensing element and the shielding structure are sequentially disposed on the inner surface of the color filter substrate, and the shielding structure is disposed between the common electrode and the color filter substrate.

In an embodiment of the novel creation, the display includes a color filter The light substrate and the active array substrate, the touch sensing element and the shielding structure are disposed on the color filter substrate, and the common electrode is disposed on the active array substrate.

In an embodiment of the novel creation, the touch sensing component is configured The outer surface of the color filter substrate is disposed on the inner surface of the color filter substrate.

In an embodiment of the novel creation, the touch sensing component and the screen The masking structures are sequentially disposed on the inner surface of the color filter substrate.

Based on the above, the touch display device of the present invention includes a display and a touch The sensing component and the shielding structure disposed between the display and the touch sensing component are controlled, and the measured line impedance of the shielding structure is less than 500 ohms. The shielding structure is provided to improve the noise suppression capability of the touch electrode and the electrostatic discharge protection capability of the common electrode, so that the touch display device has good touch and display quality.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

10, 10A, 10B, 10C, 10D‧‧‧ touch display device

100‧‧‧ display

110, 120, 302, 500‧‧‧ substrates

112‧‧‧Active component layer

114‧‧‧ pixel electrodes

120a, 120b, 500a, 500b‧‧‧ surface

122‧‧‧Color filter layer

130‧‧‧Common electrode

140‧‧‧Display media layer

150, 160, 230‧‧ ‧ protective layer

200‧‧‧Touch sensing components

210‧‧‧Touch electrode

220‧‧‧Transmission line

300‧‧‧Shielding structure

310, 310a, 310b‧‧‧ conductive layer

312, 312a-312d‧‧‧ patterned electrodes

320, 320a‧‧‧ ring electrode

322a-322d‧‧‧electrode

330, 330a-330d‧‧‧ connection pads

400‧‧‧ Covering board

410‧‧‧Decorative layer

C‧‧‧ center point

D‧‧‧ Corner

1A is a schematic exploded view of a touch display device according to an embodiment of the present invention, FIG. 1B is a top view of the shield structure of FIG. 1A, and FIG. 1C is taken along line I-I' of FIG. 1B. Schematic diagram of the section.

2 is a schematic exploded view of a touch display device according to an embodiment of the present invention.

3A is a top plan view of a shield structure according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along I-I' of FIG. 3A.

4A is a top plan view of a shield structure according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along I-I' of FIG. 4A.

FIG. 5 is a top plan view of a shielding structure according to an embodiment of the present invention.

FIG. 6 is a schematic exploded view of a touch display device according to an embodiment of the present invention.

FIG. 7 is a schematic exploded view of a touch display device according to an embodiment of the present invention.

FIG. 8 is a schematic exploded view of a touch display device according to an embodiment of the present invention.

FIG. 9 is a schematic exploded view of a touch display device according to an embodiment of the present invention.

10 is a comparative example, Comparative Example 1 to Comparative Example 3, and Experimental Example 1 and Experimental Example The shielding structure of 2 is measured by the noise value measured under grounded and ungrounded conditions.

Fig. 11 is a graph showing the relationship between the shielding structure and the shielding ratio of Comparative Example, Comparative Example 1 to Comparative Example 3, and Experimental Example 1 and Experimental Example 2.

1A is a schematic exploded view of a touch display device according to an embodiment of the present invention, FIG. 1B is a top view of the shield structure of FIG. 1A, and FIG. 1C is taken along line I-I' of FIG. 1B. Schematic diagram of the section. Referring to FIG. 1A , the touch display device 10 includes a display 100 , a touch sensing component 200 , and a shielding structure 300 . In the embodiment, the display 100 includes a substrate 110, an active device layer 112, a pixel electrode 114, a display dielectric layer 140, a common electrode 130, a color filter layer 122, and a substrate 120. The substrate 110 is, for example, an active device array substrate, which may be a glass substrate. The active device layer 112 is, for example, a gate including a gate, a channel layer, a source and a drain, a scan line electrically connected to the gate, and a data line electrically connected to the source and a protective layer covering the element. The pixel electrode 114 is, for example, disposed on the protective layer and electrically connected to the drain via a contact window in the protective layer. The substrate 120 is, for example, a color filter substrate. The color filter layer 122 is disposed on the substrate 120, for example, and the common electrode 130 is disposed on the color filter layer 122, for example. The display medium layer 140 is, for example, disposed between the pixel electrode 114 and the common electrode 130. In the present embodiment, the display medium layer 140 is, for example, a liquid crystal layer, but the novel creation is not limited thereto.

In this embodiment, the touch display device 10 includes, for example, a cover plate. 400. The cover panel 400 is located at the outermost side of the touch display device 10 and covers the display 100, the touch sensing component 200, and the shielding structure 300. The cover plate 400 may be a composite stack of tempered glass, poly(methyl methacrylate), PMMA, polycarbonate (PC), and polyethylene terephthalate (PET). A layer, a composite plastic substrate, an ultraviolet curable resin (for example, ORGA resin), or other hard light-transmitting material having high mechanical strength is provided with protection properties such as scratch resistance and high mechanical strength.

In this embodiment, the touch sensing device 200 is disposed on the inner surface of the cover plate 400 and includes a touch electrode 210 , a conductive line 220 , and a protective layer 230 . The protective layer 230 covers the touch electrode 210 . And conductive line 220. The conductive line 220 is electrically connected to the touch electrode 210 and is, for example, further connected to an external component such as a flexible printed circuit board.

The touch electrode 210 includes, for example, a plurality of first sensing members (not shown) and a plurality of second sensing members (not shown), wherein the plurality of first sensing members are driving sensing members, and the plurality of The second sensing component is a sensing sensing component, and the touch point is determined by a change in capacitance between the first sensing component and the second sensing component. Each of the first sensing elements includes a plurality of first conductive units and a plurality of first connecting portions, wherein the adjacent two first conductive units are electrically connected by the at least one first connecting portion. Each of the second sensing elements includes a plurality of second conductive units and a plurality of second connecting portions, wherein the adjacent two second conductive units are electrically connected by the at least one second connecting portion. In other embodiments, the touch electrode 210 can be a single-layer electrode structure, wherein the touch mechanism can be driven by a capacitive drive or a mutual capacitive drive, and the shape is not limited, for example, a patterned grid pattern can be formed. case.

The protective layer 230 may be a single layer structure or a multilayer stacked structure, for example, Or a single layer of inorganic layer, such as yttrium oxide; or a single layer of organic layer, such as photoresist; or a multi-layered inorganic layer with a single organic layer, such as yttria/tantalum nitride composite inorganic layer with photoresist Floor. In addition, the coverage of the protective layer 230 can completely cover the touch electrodes 210 and the conductive lines 220, and expose the bonding regions of the conductive lines 220 and external components (such as flexible printed circuit boards).

In this embodiment, the touch display device 10 includes, for example, a decorative layer. 410, the decorative layer 410 overlaps part of the touch electrodes 210 and the conductive lines 220 in the thickness direction of the touch electrodes 210, so that the conductive lines 220 can be shielded to prevent the user from perceiving the presence of the conductive lines 220. In other words, when the user is viewed from the side of the touch surface (i.e., the outer surface of the cover panel 400), the presence of the conductive line 220 is not easily perceived.

The decorative layer 410 is composed of a light-shielding material defined as a material through which light is lost through its interface for shielding components or light that are not to be seen in the device. Further, the decorative layer 410 may have an appearance that provides the beautification of the touch display device 10. The material of the decorative layer 410 may include ceramics, diamond-like carbon, ceramics, organic materials, mixtures of organic and inorganic materials, organic-inorganic hybrid compounds, or composite laminates thereof. The decorative layer 410 may be a single layer structure of a single material, a multilayer stack structure, or a multilayer stack structure of a plurality of materials. The thickness of the decorative layer 410 may range from 0.5 micrometers to 50 micrometers, but is not limited thereto. For example, the material of the decorative layer 410 may be a high temperature resistant (greater than 100 ° C) photosensitive resin (such as photoresist) or high temperature resistant Photosensitive resin (such as ink). When the decorative layer 410 is a multi-layer stack structure, the color of each layer structure may be different. For example, the decorative layer exposed on the outer side and seen by the user may be a light color (for example, white), and a dark decorative layer may be stacked. (for example, black) to improve its opacity, but not limited to this.

Referring to FIG. 1A to FIG. 1C , the shielding structure 300 is disposed between the common electrode 130 and the touch electrode 210 , wherein the measured line impedance of the shielding structure 300 is less than 500 ohms. In the present embodiment, the shielding structure 300 is attached to the display 100 and the touch sensing component 200 via a glue layer (not shown), for example, the glue layer is, for example, an optical glue. The shielding structure 300 includes, for example, a substrate 302, a conductive layer 310, and an annular electrode 320. The substrate 302 may be a film substrate such as a polyethylene terephthalate (PET) substrate, or a hard transparent substrate such as a glass substrate.

The conductive layer 310 is disposed on the substrate 302. In the present embodiment, the conductive layer 310 is, for example, a full-surface electrode layer. The material of the electrode layer may include a transparent oxide such as Indium tin oxide (ITO), Indium-Zinc Oxide (IZO), or Zinc Oxide Gallium (GZO), but is not limited thereto. The ring-shaped electrode 320 is disposed on the periphery of the conductive layer 310. In the present embodiment, the ring-shaped electrode 320 is, for example, a continuous annular pattern. The impedance of the ring electrode 320 is smaller than the impedance of the conductive layer 310, and the material thereof is, for example, silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), titanium (Ti), molybdenum (Mo), and the like. At least one of a composite laminate or an alloy of the above materials.

The shield structure 300 includes a connection pad 330 that is coupled to a ground element, such as a flexible circuit board. The connection pad 330 is disposed, for example, on the conductive layer 310. One side. In the present embodiment, the connection pad 330 is a part of the ring-shaped electrode 320, whereby the ring-shaped electrode 320 is connected to the ground element, and thus the ring-shaped electrode 320 has substantially a ground potential. Specifically, the measured line impedance of the present case is defined as the maximum line impedance measured by the energy between the conductive layer 310 and the ground potential, that is, the conductive layer 310 and the ring electrode 320 having the longest distance. The measured impedance. In the present embodiment, the conductive layer 310 having the farthest distance and the ring-shaped electrode 320 are, for example, the center point C of the conductive layer 310 and the corner D of the ring-shaped electrode 320, and thus the line impedance is, for example, the center of the conductive layer 310. The impedance obtained between the point C and the two points D at the corner of the ring electrode 320. That is to say, in the present embodiment, the line impedance between the center point C of the conductive layer 310 and the two points of the corner D of the ring-shaped electrode 320 is less than 500 ohms, so the line impedance of the shield structure 300 is less than 500 ohms. On the other hand, since the impedance of the ring-shaped electrode 320 is smaller than the impedance of the conductive layer 310, the noise received by the conductive layer 310 can be conducted to the ring-shaped electrode 320 and then vented to the ground, so that the measured impedance is substantially The impedance of the noise venting path. As can be seen from the above description, the line impedance is different from the surface impedance, and the surface impedance is only the impedance value of the material itself, and is independent of the above-mentioned connection pads and the signal venting path. In other embodiments, the shield structure 300 includes only the conductive layer 310, and the line impedance from the center point C of the conductive layer 310 to the connection point of the ground element connection is less than 500 ohms.

In particular, it is covered by the conductive layer 310 as compared with the embodiment. The entire substrate 302 is taken as an example. In another embodiment, the touch display device 10 of FIG. 2 has a main function of the conductive layer 310 of the shielding structure 300 to prevent the touch electrode 210 from being disturbed and causing malfunction. Layer 310 can only correspond to touch The control electrode 210 is disposed.

In the present embodiment, the conductive layer 310 and the annular electrode 320 have a structure as shown in FIG. 1B as an example, but the novel creation is not limited thereto. 3A is a top plan view of a shield structure according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along I-I' of FIG. 3A. Referring to FIG. 3A and FIG. 3B , in the shielding structure 300 of the embodiment, the conductive layer 310 a is, for example, a patterned electrode layer, and thus the conductive layer 310 a is, for example, a plurality of patterned electrodes 312 separated from each other. The patterned electrodes 312 are electrically connected to each other via the ring-shaped electrodes 320 disposed thereon. In the present embodiment, the conductive layer 310 includes four patterned electrodes 312 as an example, but the novel creation is not limited thereto. In the present embodiment, the conductive layer 310 having the furthest distance and the connection pad 330 are, for example, the corner C of the patterned electrode 312 having a diagonal relationship and the corner D of the ring-shaped electrode 320. That is, in the present embodiment, the line impedance between the corner C of the patterned electrode 312 and the two points of the corner D of the ring electrode 320 is less than 500 ohms. In this embodiment, when a signal is transmitted to the conductive layer 310a, the signal can be dispersed to the patterned electrodes 312, and thus vented to the connection pad 330 at a faster rate. In other words, the conductive layer 310a having the plurality of patterned electrodes 312 can further enhance the ability of the shield structure 300 to vent the signal compared to the entire conductive layer 310 as shown in FIG. 1B.

4A is a top plan view of a shield structure according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along I-I' of FIG. 4A. Referring to FIG. 4A and FIG. 4B, in the shielding structure 300 of the embodiment, the conductive layer 310a is, for example, a plurality of patterned electrodes 312a-312d, and the ring-shaped electrode 320a includes, for example, a plurality of The separated sub-electrodes 322a-322d, the sub-electrodes 322a-322d, for example, each have a connection pad 330a-330d. The sub-electrodes 322a to 322d are disposed, for example, on the periphery of the conductive layer 310a, and are arranged substantially in a ring shape. In the present embodiment, the conductive layer 310a and the connection pad 330 having the furthest distance are, for example, the corners C of the respective patterned electrodes 312a-312d and the corners D of the corresponding secondary electrodes 322a-322d. That is, in the present embodiment, the line impedance between the corner C of the patterned electrodes 312a-312d and the two points of the corners D of the secondary electrodes 322a-322d is less than 500 ohms. In this embodiment, the sub-electrodes 322a-322d and the patterned electrodes 312a-312d have, for example, a one-to-one relationship. In other words, the signals received by the patterned electrodes 312a-312d are respectively via the corresponding sub-electrodes 322a-322d. The connection pads 330a-330d are vented. In this way, the ability of the shield structure 300 to vent the signal can be improved.

In the above embodiments, the conductive layer 310, 310a is a transparent conductive layer or a patterned transparent conductive layer as an example, but the novel creation is not limited thereto. FIG. 5 is a top plan view of a shielding structure according to an embodiment of the present invention. Referring to FIG. 5, in the embodiment, the shielding structure 300 includes a substrate 302 and a conductive layer 310b. The conductive layer 310b is a grid electrode, and the grid electrode has a line width of between 0.1 um and 20 um, and the line width is preferably between 1 um and 10 um. The material of the grid electrode may be a transparent conductive material, a metal, a nanowire, a terpene, a graphene or a composite layer of the above materials, wherein the metal includes silver (Ag), aluminum (Al), copper (Cu). At least one of chromium (Cr), titanium (Ti), molybdenum (Mo), a composite laminate of the above materials, or an alloy of the above materials. For example, the composite laminate can be a three-layer structure of molybdenum/aluminum/molybdenum or indium tin oxide/silver/indium tin oxide. In this embodiment, due to The impedance of the conductive layer 310b having a lattice structure is substantially lower than that of the entire surface or the patterned conductive layer, so that the ability of the shield structure 300 to vent the signal can be improved.

The touch display device 10A of FIG. 6 is substantially similar to the touch display device 10 of FIG. 1A . The difference between the touch display device 10 and the shield structure 300 is disposed on the opposite surfaces 120 a , 120 b of the same substrate 120 . In the embodiment, the substrate 120 is disposed between the touch sensing element 200 and the display 100, and the substrate 120 is a color filter substrate. The touch sensing component 200 is located on the outer surface 120a of the substrate 120, for example, and the shielding structure 300 is located on the inner surface 120b of the substrate 120, and the shielding structure 300 is disposed between the common electrode 130 and the substrate 120. In detail, in the touch sensing device 200, the touch electrodes 210 and the conductive lines 220 are disposed on the outer surface 120a of the substrate 120, for example, the protective layer 230 is disposed on the outer surface 120a of the substrate 120 and covers the touch. Control electrode 210 and conductive line 220. For the shielding structure 300 and the display 100, the conductive layer 310 and the annular electrode 320 are disposed on the inner surface 120b of the substrate 120, for example, the protective layer 150 is disposed on the inner surface 120b of the substrate 120 and covers the conductive layer 310 and Ring electrode 320. The conductive layer 310 is formed on the inner surface 120b of the substrate 120, for example, by plating. In the present embodiment, the color filter layer 122 is disposed on the protective layer 150, for example. Furthermore, since the common electrode 130 is disposed on the color filter layer 122, for example, the shield structure 300 is disposed between the common electrode 130 and the touch electrode 210. That is, in the present embodiment, the shield structure 300 is integrated in the display 100. In particular, when the touch display device 10 includes an organic light emitting diode display (not shown), the substrate 120 may also be a package cover of the organic light emitting diode display. The board, that is, the touch sensing element 200 and the shielding structure 300 are integrated in the package cover of the organic light emitting diode display.

The touch display device 10B of FIG. 7 is substantially similar to the touch display device of FIG. 1A. The difference between the two is mainly to integrate the touch sensing component 200 and the shielding structure 300 into the display 100. In detail, in the embodiment, the substrate 120 is disposed between the cover plate 400 and the touch sensing element 200 and the display 100, for example. That is, the cover plate 400 is located on one side of the substrate 120, and the touch sensing element 200 and the display 100 are located on the other side of the substrate 120. In this embodiment, the touch sensing device 200 and the shielding structure 300 are sequentially disposed on the inner surface 120b of the substrate 120, and the shielding structure 300 is disposed between the common electrode 130 and the substrate 120. The substrate 120 is, for example, a color filter substrate in the display 100. In detail, the touch electrodes 210 and the conductive lines 220 are disposed on the inner surface 120 b of the substrate 120 , for example, and the protective layer 230 is disposed on the inner surface of the substrate 120 and covers the touch electrodes 210 and the conductive lines 220 . The conductive layer 310 and the ring-shaped electrode 320 are disposed on the protective layer 230, for example, and the protective layer 160 covers the conductive layer 310 and the ring-shaped electrode 320, for example. The color filter layer 122 is disposed on the protective layer 160, for example, and the common electrode 130 is disposed on the color filter layer 122, for example. That is, in the present embodiment, the touch sensing component 200 and the shielding structure 300 are disposed between the substrate 110 and the substrate 120 such that the touch sensing component 200 and the shielding structure 300 are integrated into the display 100.

The touch display device 10C of FIG. 8 is substantially similar to the touch display device of FIG. 10A, the difference between the two is mainly that the touch display device 10C includes an In-Plane Switching (IPS) display element. In this embodiment, the display 100 The color filter substrate 120 and the active array substrate 110 are disposed. The touch sensing device 200 and the shielding structure 300 are disposed on the color filter substrate 120, and the common electrode 130 and the pixel electrode 114 are disposed on the active array substrate 110. The touch sensing component 200 is disposed on the outer surface 120a of the color filter substrate 120, and the shield structure 300 is disposed on the inner surface 120b of the color filter substrate 120. In this embodiment, the common electrode 130 is located on the substrate 110, so the distance between the touch electrode 210 and the common electrode 130 is increased, so that the probability that the signal of the common electrode 130 interferes with the touch electrode 210 is reduced, and the setting of the shielding structure 300 is matched. Can improve the shielding ability.

The touch display device 10D of FIG. 9 is substantially similar to the touch display device 10A of FIG. 6 . The difference between the two is mainly that the touch electrode 210 and the conductive layer 310 are disposed on the other substrate 500 . In detail, in the present embodiment, the touch display device 10 includes a substrate 500, which may be a rigid transparent substrate such as a glass substrate, or a polyethylene terephthalate (PET) substrate such as a polyethylene terephthalate (PET) substrate. A film substrate, such as a film substrate containing a material such as polyamidamine or a cyclic olefin copolymer, which is resistant to higher temperatures. The touch electrodes 210 and the conductive layer 310 are disposed on the opposite surfaces 500a and 500b of the substrate 500, for example. The touch electrode 210 is bonded to the cover plate 400 via an adhesive layer, and the conductive layer 310 is bonded to the display 100 via an adhesive layer, wherein the material of the adhesive layer may be a viscous resin or a glue. In other words, in the present embodiment, the touch sensing device 200 and the shielding structure 300 are disposed on the same substrate 500, and are respectively bonded to the cover panel 400 and the display 100 to be integrated into the touch display device 10D. In other embodiments, the shielding structure 300 can be disposed on another substrate and then bonded to the substrate 500 through the adhesive layer. In addition, the touch sensing component 200 The shielding structure 300 can be disposed on the surface of the protective layer 230, or the shielding structure 300 can be disposed on the other substrate, and then bonded to the touch sensing element 200 through the adhesive layer.

Furthermore, in the above embodiment, the first sensing of the touch electrode 210 is The piece and the second sensing element are located on the same surface of the same substrate, but the novel creation is not limited thereto. That is, in another embodiment, when the first sensing element and the second sensing element are respectively located on opposite surfaces of the same substrate, or are respectively located on different substrates, wherein the first sensing element is compared to the first sensing element The second sensing element is closer to the display 100, and the shielding structure 300 is disposed between the second sensing element and the display 100.

In the above embodiments, the touch display device 10, 10A, 10B, 10C, The 10D includes a display 100, a touch sensing component 200, and a shielding structure 300 disposed between the common electrode 130 and the touch electrode 210, and the measured line impedance of the shielding structure 300 is less than 500 ohms. For a touch display device with integrated touch sensing components, it is necessary to simultaneously consider the electrostatic protection of the touch electrodes and the noise interference between the touch electrodes and the common electrodes. Therefore, the shielding structure is required to provide noise suppression. With electrostatic discharge protection effect. The present invention defines a shield structure 300 having a line impedance range of less than 500 ohms, which provides an optimized guideline 300. In this way, the shielding structure 300 can avoid the mutual influence of the touch electrode 210 and the common electrode 130, so that the touch display devices 10, 10A, 10B, 10C, and 10D have good touch and display quality.

Next, the shielding effect of the shielding structure of the present case will be explained experimentally.

In one experiment, the line impedance of the shield structure was measured. First, prepare the Subo The glass, the transparent conductive layer, and the transparent conductive layer in which the ring-shaped electrode was disposed were used as the shielding structures of Comparative Example, Comparative Example 1 to Comparative Example 3, and Experimental Example 1 and Experimental Example 2, respectively. Next, the line resistances of the shield structures of Comparative Examples 1 to 3 and Experimental Examples 1 and 2 were measured, and in detail, in Comparative Examples 1 to 3, the center point and the corner of the transparent conductive layer were measured. In the experimental example 1 and the experimental example 2, the impedance between the center point C of the conductive layer 310 and the corner D of the ring-shaped electrode 320 was measured as shown in Fig. 1B, and the results are shown in Table 1. .

In another experiment, the shielding effect of the shield structure was measured. First, the shielding structures of Comparative Example, Comparative Example 1 to Comparative Example 3, and Experimental Example 1 and Experimental Example 2 were placed on a wave source generator. Then, under the condition that the shielding structure is grounded and ungrounded, the noise measurement is performed on the user touch surfaces of the shielding structures of the comparative example, the comparative example 1 to the comparative example 3, and the experimental example 1 and the experimental example 2, respectively. The measurement points are, for example, the center points of the plain glass, the transparent conductive layer, and the transparent conductive layer in which the ring electrodes are disposed, and the results are shown in Table 1.

10 is a comparative example, Comparative Example 1 to Comparative Example 3, and Experimental Example 1 and The shielding structure of the test example 2 has a relationship of noise values measured under grounded and ungrounded conditions, respectively. It can be seen from FIG. 10 that when the shielding structure is not grounded, the noise measurement is performed on the touch surface of the user, and the measured noise value is greater than 1V. Conversely, after the shield structure is grounded, the measured noise value drops significantly, both below 0.6V.

Fig. 11 is a graph showing the relationship between the shielding structure and the shielding ratio of Comparative Example, Comparative Example 1 to Comparative Example 3, and Experimental Example 1 and Experimental Example 2. As can be seen from Figure 11, only through Under the condition that the conductive layer is grounded (ie, Comparative Example 1 to Comparative Example 3), the noise shielding rate is about 60%. However, after the ring-shaped electrode was disposed on the transparent conductive layer (ie, Experimental Example 1 and Experimental Example 2), the line resistance can be reduced to 500 ohm or less, thereby increasing the noise shielding rate to 80%. Therefore, it can be seen from the above experiment that the shielding structure has a line impedance of less than 500 ohms to provide a better shielding effect.

In summary, the touch display device of the present invention includes a display, a touch sensing component, and a shielding structure disposed between the display and the touch sensing component. For a touch display device with integrated touch sensing components, it is necessary to simultaneously consider the electrostatic protection of the touch electrodes and the noise interference between the touch electrodes and the common electrodes. Therefore, the shielding structure is required to provide noise suppression. With electrostatic discharge protection effect. This case provides guidelines for an optimized shielding structure, that is, the measured line impedance of the shielding structure is less than 500 ohms. That is to say, if the shielding structure is disposed under the range, the interaction between the touch sensing component and the common electrode can be avoided, thereby improving the noise suppression capability and the electrostatic discharge protection capability, so that the touch display device has good touch. Control and display quality. On the other hand, the shielding structure of the present invention can be easily combined with the structure and process of the existing touch display device, so that the manufacturing cost of the touch display device is not greatly changed or increased.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

300‧‧‧Shielding structure

310‧‧‧ Conductive layer

320‧‧‧Ring electrode

330‧‧‧Connecting mat

C‧‧‧ center point

D‧‧‧ Corner

Claims (20)

A touch display device includes: a display including a common electrode; a touch sensing component including a touch electrode; and a shielding structure disposed between the common electrode and the touch electrode, wherein the shielding The measured line impedance of the structure is less than 500 ohms. The touch display device of claim 1, wherein the shielding structure comprises a conductive layer and a connection pad, the connection pad is disposed on one side of the conductive layer, and the measured line impedance is The maximum line impedance measured by the energy between the conductive layer and the connection pad. The touch display device of claim 2, wherein the shielding structure further comprises a ring-shaped electrode disposed on a periphery of the conductive layer, and the ring-shaped electrode has the connection pad. The touch display device of claim 3, wherein the impedance of the annular electrode is smaller than the impedance of the conductive layer. The touch display device of claim 3, wherein the annular electrode comprises a plurality of secondary electrodes separated from each other, and the conductive layer comprises a plurality of patterned electrodes separated from each other. The touch display device of claim 5, wherein each of the secondary electrodes has the connection pad. The touch display device of claim 5, wherein the measurement points measured between the conductive layer and the connection pad are each of the patterns having a diagonal relationship. The edge of the electrode is at the edge of the annular electrode. The touch display device of claim 2, wherein the measurement point measured between the conductive layer and the connection pad is a center point of the conductive layer and a farthest from a center point of the conductive layer. A position of the ring electrode. The touch display device of claim 2, wherein the conductive layer is a grid electrode. The touch display device of claim 1, further comprising a substrate disposed between the common electrode and the touch electrode, wherein the shielding structure is disposed on the substrate. The touch display device of claim 10, wherein the substrate comprises a polyethylene terephthalate substrate or a glass substrate. The touch display device of claim 10, further comprising a cover plate, the touch sensing component is disposed on an inner surface of the cover plate, and the cover plate covers the shielding structure and the display. The touch display device of claim 1, wherein the display comprises a color filter substrate, the touch sensing component is disposed on an outer surface of the color filter substrate, and the shielding structure is disposed in the color The inner surface of the filter substrate is disposed, and the shielding structure is disposed between the common electrode and the color filter substrate. The touch display device of claim 13, wherein the common electrode is disposed on the shielding structure. The touch display device of claim 1, wherein the display comprises a package cover, and the touch sensing component is disposed on the outer surface of the package cover The shielding structure is disposed on an inner surface of the package cover, and the shielding structure is disposed between the common electrode and the package cover. The touch display device of claim 1, wherein the display comprises a color filter substrate, and the touch sensing component and the shielding structure are sequentially disposed on an inner surface of the color filter substrate. And the shielding structure is disposed between the common electrode and the color filter substrate. The touch display device of claim 1, wherein the display comprises a color filter substrate and an active array substrate, the touch sensing component and the shielding structure are disposed on the color filter substrate, and The common electrode is disposed on the active array substrate. The touch display device of claim 17, wherein the touch sensing component is disposed on an outer surface of the color filter substrate, and the shielding structure is disposed on an inner surface of the color filter substrate. on. The touch display device of claim 17, wherein the touch sensing component and the shielding structure are sequentially disposed on an inner surface of the color filter substrate. The touch display device of claim 1, further comprising a substrate disposed between the common electrode and the touch electrode, wherein the shielding structure is disposed on the substrate.