Touch display device

Abstract

The invention provides a touch display device. The touch display device comprises a pixel array substrate, a touch substrate, a display medium layer, a first conducting layer, a second conducting layer and a conducting piece. The touch control substrate is arranged above the pixel array substrate. The display medium layer is arranged between the pixel array substrate and the touch substrate. The first conductive layer is arranged on one side of the touch substrate. The second conductive layer is arranged on the other side of the touch substrate. The conduction piece is arranged along the side wall of the touch substrate so as to be connected between the first conductive layer and the second conductive layer.

Description

Technical Field

[0001] The present invention relates to an electronic device, and in particular to a touch display device. Background Art

[0002] Many electronic products on the market are incorporating touch technology, offering convenient operation and a streamlined design. To combine display and touch functionality, various touch-display integration technologies have been proposed. For example, display and touch electrodes can be shared, contributing to a streamlined product design. Summary of the Invention

[0003] The present invention is directed to a touch display device that combines touch and display functions with good quality.

[0004] According to an embodiment of the present invention, a touch display device includes a pixel array substrate, a touch substrate, a display medium layer, a first conductive layer, a second conductive layer, and a conductive member. The touch substrate is disposed above the pixel array substrate. The display medium layer is disposed between the pixel array substrate and the touch substrate. The first conductive layer is disposed on one side of the touch substrate. The second conductive layer is disposed on the other side of the touch substrate. The conductive member is disposed along a sidewall of the touch substrate to connect between the first and second conductive layers.

[0005] In the touch display device according to the embodiment of the present invention, the touch display device further includes a circuit board bonded to the touch substrate and electrically connected to the second conductive layer and electrically connected to the first conductive layer through the conductive member.

[0006] In a touch display device according to an embodiment of the present invention, a touch substrate includes a first substrate, a second substrate, a first conductive layer, a second conductive layer, and a conductive member. The first substrate is disposed between the pixel array substrate and the second substrate. The first conductive layer is disposed on the first substrate and located between the display medium layer and the first substrate. The second conductive layer is disposed on the second substrate and located between the first and second substrates. The conductive member is disposed along a sidewall of the first substrate to connect the first and second conductive layers.

[0007] In the touch display device according to the embodiment of the present invention, the touch display device further includes optical adhesive disposed between the first substrate and the second substrate.

[0008] In the touch display device according to the embodiment of the present invention, the first substrate extends beyond the display medium layer to have a protruding portion, and the conductive element is connected to the first conductive layer at the protruding portion.

[0009] In the touch display device according to the embodiment of the present invention, the second substrate extends beyond the first substrate to have a protruding portion, and the conductive member is disposed along the sidewall of the first substrate and extends to the protruding portion of the second substrate.

[0010] In the touch display device according to the embodiment of the present invention, the conductive element overlaps on the first substrate and contacts the first conductive layer.

[0011] In the touch display device according to the embodiment of the present invention, the touch display device further includes a water-blocking layer disposed on the first substrate.

[0012] In the touch display device according to the embodiment of the present invention, the touch display device further includes a sealant disposed on the pixel array substrate, surrounding the display medium layer and the touch substrate, and covering the conductive member.

[0013] In the touch display device according to an embodiment of the present invention, the first conductive layer includes a plurality of first strip electrodes, each of which extends along a first direction. An end of each first strip electrode extends beyond the display medium layer, and the conductive member contacts the end of a corresponding first strip electrode.

[0014] In a touch display device according to an embodiment of the present invention, the second conductive layer includes a plurality of second strip electrodes, a plurality of pads, and a plurality of transmission lines. Each second strip electrode extends along a second direction, and the first direction and the second direction intersect but are electrically insulated from each other. Each second strip electrode, the plurality of pads, and the plurality of transmission lines are at different voltage levels.

[0015] In the touch display device according to the embodiment of the present invention, the touch display device further includes a display driving circuit coupled to the pixel array substrate.

[0016] Based on the above, the touch display panel of the present invention uses conductive elements connected between the two substrates to form an electrical transmission path for the touch electrodes. This prevents interference between the touch and display circuit structures. Furthermore, the touch display panel of the present invention uses transparent conductive materials to fabricate the electrodes that perform both display and touch functions. Because transparent conductive materials are not easily corroded by the display dielectric layer, they ensure the life of the electrodes and achieve high product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a plan view of a touch display device according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic cross-sectional view of a touch display device taken along line II';

[0019] Figure 3 Presenting the layout of the first conductive layer and the second conductive layer in some embodiments;

[0020] Figure 4 is an enlarged schematic diagram of some components in a touch display device according to some embodiments of the present invention;

[0021] Figure 5 for Figure 4 A three-dimensional schematic diagram of the structure. DETAILED DESCRIPTION

[0022] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0023] Figure 1 is a schematic plan view of a touch display device according to an embodiment of the present invention, and Figure 2 yes Figure 1 A schematic cross-sectional view of a touch display device along line II'. Figure 1 In order to facilitate the explanation, the outlines of individual components are shown, but in fact, the stacking order of these components can be referred to Figure 2 .like Figure 1 and Figure 2 As shown, the touch display device 100 includes a pixel array substrate 110, a first substrate 120, and a second substrate 130. In direction Z, the pixel array substrate 110, the first substrate 120, and the second substrate 130 are stacked in sequence, and the first substrate 120 is disposed between the pixel array substrate 110 and the second substrate 130. In some embodiments, the pixel array substrate 110 may include a substrate 112 and a pixel array 114 disposed on the substrate 112, wherein the substrate 112 of the pixel array substrate 110 may be an opaque substrate or a transparent substrate. Both the first substrate 120 and the second substrate 130 are transparent substrates that allow display light to pass through. When a user uses the touch display device 100 and / or views the image displayed by the touch display device 100, the second substrate 130 is closer to the user than the pixel array substrate 110.

[0024] The substrate 112, first substrate 120, and second substrate 130 may be made of glass, polymer, or other suitable substrate materials. The substrate polymer may include cyclo-olefin polymers (COP), cyclic olefin copolymer (COC), polymethylmethacrylate (PMMA), or the like. In some embodiments, the substrate 112, first substrate 120, and second substrate 130 may be flexible for use in flexible products.

[0025] The touch display device 100 further includes a display medium layer 140. The display medium layer 140 is disposed between the pixel array substrate 110 and the first substrate 120. In some embodiments, the display medium layer 140 may be an electronic paper display layer. For example, the display medium layer 140 may include electronic paper display materials, and the display medium layer 140 may be encapsulated into layers using encapsulation technologies such as microcups and microcapsules. In order to drive the display medium layer 140, the touch display device 100 further includes a display medium layer 140. Figure 2 The first conductive layer 150 is disposed on the first substrate 120 and is located between the display medium layer 140 and the first substrate 120. For example, the first conductive layer 150 and the pixel array 114 in the pixel array substrate 110 can provide an electric field for driving the display medium layer 140. In some embodiments, the first conductive layer 150 is made of a transparent conductive material. In some embodiments, the first conductive layer 150 contacts the display medium layer 140 without any other film layer interposed therebetween, but the present invention is not limited thereto.

[0026] In addition, the touch display device 100 further includes Figure 2 The second conductive layer 160 is disposed on the second substrate 130 and between the first substrate 120 and the second substrate 130. The first conductive layer 150 and the second conductive layer 160 can be separated by a distance and electrically independent of each other. Therefore, a capacitor is formed between the first conductive layer 150 and the second conductive layer 160, which is used to implement the touch function. Therefore, the first conductive layer 150 is used in conjunction with the pixel array 114 to implement the display function, and is also used in conjunction with the second conductive layer 160 to implement the touch function.

[0027] The touch display device 100 further includes a conductive member 170. In this embodiment, the touch display device 100 includes a touch substrate 102, and the touch substrate 102 includes a first substrate 120, a second substrate 130, a first conductive layer 150, a second conductive layer 160, and a conductive member 170. The first conductive layer 150 is disposed on one side of the touch substrate 102, the second conductive layer 160 is disposed on the other side of the touch substrate 102, and the conductive member 170 is disposed along the side wall of the touch substrate 102 to connect between the first conductive layer 150 and the second conductive layer 160. Specifically, the conductive member 170 is disposed along the side wall S120 of the first substrate 120 to connect between the first conductive layer 150 and the second conductive layer 160. The conductive member 170 overlaps and contacts the first conductive layer 150 on the first substrate 120 and overlaps and contacts the second conductive layer 160 on the second substrate 130. As Figure 1 and Figure 2As shown, the first substrate 120 extends beyond the display medium layer 140 and has a protruding portion 122, and the conductive member 170 is connected to the first conductive layer 150 at the protruding portion 122. The second substrate 130 extends beyond the first substrate 120 and has a protruding portion 132, wherein the conductive member 170 is arranged along the side wall S120 of the first substrate 120 and extends to the protruding portion 132 of the second substrate 130. Figure 2 In the embodiment, the first conductive layer 150 is provided on the back side B120 of the first substrate 120 facing the display medium layer 140. The conductive member 170 may, for example, contact the first conductive layer 150 on the back side B120 of the first substrate 120, extend along the back side B120 to the edge of the first substrate 120, and then extend along the side wall S120 of the first substrate 120 toward the second substrate 130 until it partially covers the protrusion 132 of the second substrate 130. In other words, the conductive member 170 is Figure 2 In addition, a portion of the second conductive layer 160 (eg, the pad 164 ) may be disposed on the protrusion 132 for connection to the conductive member 170 .

[0028] In some embodiments, the touch display device 100 further includes an optical adhesive 180, and the optical adhesive 180 is disposed between the first substrate 120 and the second substrate 130. Specifically, both the first substrate 120 and the optical adhesive 180 are disposed between the first conductive layer 150 and the second conductive layer 160. The optical adhesive 180 can be used to attach the second substrate 130 to the first substrate 120 and allow display light to pass through. The contour of the optical adhesive 180 can be substantially aligned with the first substrate 120. The conductive member 170 can, for example, extend from the protrusion 122 of the first substrate 120 along the sidewalls S120 of the first substrate 120 and the sidewalls S180 of the optical adhesive 180 to the protrusion 132 of the second substrate 130. In some embodiments, the refractive index of the first substrate 120 and the second substrate 130 can be close to or even the same as the refractive index of the optical adhesive 180 to provide good display light transmittance. Figure 2 In the embodiment, the thickness and ratio of each layer (eg, optical adhesive, substrate) are merely examples, and the present invention is not limited thereto. The ratio and thickness of each layer can be adjusted according to the design.

[0029] In some embodiments, the touch display device 100 further includes a water-repellent layer 182. The water-repellent layer 182 is disposed on the first substrate 120, with the water-repellent layer 182 and the first conductive layer 150 disposed on opposite sides of the first substrate 120. For example, the water-repellent layer 182 is disposed on the front side F120 of the first substrate 120, while the first conductive layer 150 is disposed on the back side B120 of the first substrate 120. The water-repellent layer 182 can be used to block intrusive moisture, thereby protecting the display medium layer 140 from deterioration and / or damage caused by moisture. In some embodiments, the water-repellent layer 182 and the first conductive layer 150 are disposed on the same side of the first substrate 120, such as the back side B120. In some embodiments, the water-repellent layer 182 can be disposed on both the front side F120 and the back side B120 of the first substrate 120.

[0030] In some embodiments, the touch display device 100 further includes a circuit board 190. The circuit board 190 is bonded to the second substrate 130 of the touch substrate 102. The circuit board 190 is electrically connected to the second conductive layer 160 and to the first conductive layer 150 via the conductive member 170. In other words, the circuit board 190 is electrically connected to the first conductive layer 150 via a signal transmission path established by the second conductive layer 160 and the conductive member 170 on the second substrate 130. The circuit board 190 can transmit signals to the first conductive layer 150 via the second conductive layer 160 and the conductive member 170, thereby enabling the transmission of touch signals. A touch control circuit chip 191 for touch control can be provided on the circuit board 190 to control, receive, and / or calculate touch signals carried by the first conductive layer 150 and the second conductive layer 160. In some embodiments, the circuit board 190 can be a flexible circuit board.

[0031] In some embodiments, the touch display device 100 further includes a display driver circuit 192, which is bonded to the pixel array substrate 110 and electrically connected to the pixel array 114. Here, the display driver circuit 192 and the circuit board 190 are bonded to the pixel array substrate 110 and the second substrate 130, respectively, and the display driver circuit 192 and the circuit board 190 can be disposed on the same side of the touch display device 100, such as Figure 1 As shown. Because the circuit board 190 is bonded to the second substrate 130 rather than to the first substrate 120, the display driver circuit 192 and the circuit board 190 can be appropriately separated without structural interference. In some embodiments, the sum of the thickness T192 of the display driver circuit 192 and the thickness T190 of the circuit board 190 may not be greater than the spacing distance SD between the pixel array substrate 110 and the second substrate 130. In this way, the external components required for the touch display device 100 to have both display and touch functions can be easily installed. In some embodiments, the thickness T192 of the display driver circuit 192 may be less than the thickness T180 of the optical adhesive 180.

[0032] Furthermore, the circuit board 190 is bonded to the second substrate 130 without performing a bonding step on the first substrate 120. Therefore, the temperature applied during the bonding step does not affect the first substrate 120 and the components thereon, helping to ensure that the components are not damaged during the manufacturing process. For example, the water-blocking layer 182 provided on the first substrate 120 is sensitive to temperature conditions. In some embodiments, the temperature during the bonding step may cause the water-blocking layer 182 to deteriorate. Therefore, embodiments in which the first substrate 120 does not undergo a bonding step help maintain the quality of the water-blocking layer 182.

[0033] In some embodiments, the touch display device 100 further includes a sealant 194. The sealant 194 is disposed on the pixel array substrate 110, surrounding the display medium layer 140, the first substrate 120, and the second substrate 130, and the sealant 194 covers the conductive member 170. The sealant 194 can be disposed along the periphery of the touch display device 100 to block moisture from invading from the side, thereby protecting the display medium layer 140 from damage and / or deterioration caused by moisture. Figure 2 As shown, the sealant 194 can be continuously distributed between the pixel array substrate 110 and the second substrate 130, thereby effectively providing a barrier to lateral moisture. In some embodiments, the sealant 194 can extend to cover the sidewalls S130 of the second substrate 130.

[0034] For the sake of convenience, Figure 1 The first conductive layer 150 and the second conductive layer 160 are omitted. Figure 3 The layout of the first conductive layer and the second conductive layer in some embodiments is presented. Figures 1 to 3 In some embodiments, the first conductive layer 150 may include a plurality of first strip electrodes 152, and each first strip electrode 152 extends along direction X. The second conductive layer 160 includes a plurality of second strip electrodes 162, and each second strip electrode 162 extends along direction Y, and direction X intersects direction Y, and the first strip electrodes 152 and the second strip electrodes 162 are electrically insulated and have different voltage levels to provide a touch sensing function. In some embodiments, the width of the first strip electrode 152 in direction Y may be greater than the width of the second strip electrode 162 in direction X. The first conductive layer 150 and the second conductive layer 160 can provide a touch sensing function and can be regarded as a touch unit. Here, the first strip electrode 152 can also be used in conjunction with Figure 2 The pixel array 114 is used for display function.

[0035] In some embodiments, the ends of each first strip electrode 152 extend beyond the display medium layer 140 and are partially located within the protrusion 122 of the first substrate 120. The conductive member 170 may contact the end of a corresponding first strip electrode 152. In other words, the conductive member 170 contacts the corresponding first strip electrode 152 at the protrusion 122. In some embodiments, the conductive member 170 is disposed at both ends of each first strip electrode 152. In some embodiments, multiple conductive members 170 may be disposed at one end of each first strip electrode 152. In some embodiments, each first strip electrode 152 may extend to the edge of the first substrate 120. In some embodiments, each first strip electrode 152 may be spaced some distance from the edge of the first substrate 120.

[0036] The second conductive layer 160 may further include pads 164, and the pads 164 may be disposed on the protrusion 132 of the second substrate 130 corresponding to the conductive member 170. The conductive member 170 may extend from the end of the first strip electrode 152 to overlap and contact the pads 164 to establish the required signal transmission path. Specifically, the conductive member 170 may extend from the end of a corresponding first strip electrode 152 toward the edge of the first substrate 120, then be disposed along the sidewall S120 of the first substrate 120 and further cover the pads 164 located on the protrusion 132. In some embodiments, the width W164 of the pad 164 may be greater than the width W170 of the conductive member 170, wherein the width W170 of the conductive member 170 can be adjusted as needed, for example, 0.6 mm to 0.8 mm. However, the present invention is not limited to this.

[0037] The second conductive layer 160 may further include a transmission line 166 and a pad 168, which are limited by the area shown in the figure. Figure 1 Only one transmission line 166 and one pad 168 are shown. Figure 2 Transmission line 166 is omitted. Figure 3The pads 168 are omitted. In fact, the number of transmission lines 166 and pads 168 provided in the touch display device 100 is multiple. The transmission lines 166 can be connected between the pads 164 and the corresponding pads 168, and the circuit board 190 can be bonded to the pads 168 to establish the required signal transmission path. In some embodiments, although not shown in the figure, part of the transmission lines 166 can be connected between the second strip electrodes 162 and the corresponding pads 168, so that the second strip electrodes 162 can also be connected to the circuit board 190 through the transmission lines 166 and the corresponding pads 168. In this embodiment, the first conductive layer 150 and the second conductive layer 160 constitute a touch unit, and the transmission lines 166 and pads 168 required for the touch unit are made of the second conductive layer 160, so the circuit board 190 only needs to be bonded to the second substrate 130. A first touch voltage signal on the circuit board 190 is transmitted to the first strip electrodes 152 of the first conductive layer 150 via the pads 168, transmission lines 166, pads 164, and conductive elements 170. A second touch voltage signal on the circuit board 190 is transmitted to the second strip electrodes 162 of the second conductive layer 160 via another conductive line (not shown). The first touch voltage signal and the second touch voltage signal have different potentials to provide touch sensing. Therefore, the pads 168, transmission lines 166, pads 164 of the second conductive layer 160 and the second strip electrodes 162 are at different voltage levels. The pads 168, transmission lines 166, and pads 164 of the second conductive layer 160 are electrically connected to the first conductive layer 150 and the first strip electrodes 152 and are at the same voltage level.

[0038] Each first strip electrode 152 can be made of a conductive material such as a non-elemental metal or metal alloy. For example, each first strip electrode 152 can be made of a transparent conductive material. Transparent conductive materials include, for example, conductive metal oxides, conductive organic materials, or the like. Each first strip electrode 152 that contacts the display medium layer 140 is made of a conductive material such as a non-elemental metal or metal alloy to prevent corrosion of the elemental metal or metal alloy by the material of the display medium layer 140. Therefore, the touch display device 100 can have good quality and an ideal service life. In some embodiments, the first conductive layer 150 is made of a transparent conductive material that allows display light to pass through, so that the touch display device 100 can maintain a good display effect.

[0039] The pads 164, transmission lines 166, and pads 168 are all made of the same film layer as the second strip electrodes 162 to form the second conductive layer 160. The material of the second conductive layer 160 may include elemental metal, metal alloy, or the like. When a user views the display of the touch display device 100, the second conductive layer 160 is closer to the user than the display medium layer 140. The opaque nature of the second conductive layer 160 may affect the display. However, the second strip electrodes 162 can be made of a highly conductive metal and have a thinner line width, or the second strip electrodes 162 can be arranged corresponding to pixel boundaries in the pixel array 114, so that the touch display device 100 can still maintain an ideal display effect. In some embodiments, the second conductive layer 160 can be made of a transparent conductive material. In some embodiments, the material of the second conductive layer 160 includes elemental metal, metal alloy, conductive oxide, organic conductive material, or a combination thereof.

[0040] The conductive member 170 may be made of a conductive material that can conform to a three-dimensional surface, such as a conductive polymer (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)), silver glue, tin glue, or other conductive materials. The conductive member 170 can be fabricated by coating, printing, or deposition, and positioned between the first conductive layer 150 and the second conductive layer 160 along a stepped path. The conductive member 170 may partially cover both the first conductive layer 150 and the second conductive layer 160 to establish a good signal transmission path. In some embodiments, the contact resistance of the conductive member 170 disposed along the three-dimensional surface may be approximately 85 ohms.

[0041] Figure 4 is an enlarged schematic diagram of some components of a touch display device in some embodiments of the present invention, and Figure 5 for Figure 4 For the convenience of description, Figure 4 and Figure 5 The structure shown corresponds to Figure 1 In region A, and Figure 4 and Figure 5 Only the first substrate 120 ′, the first conductive layer 150 ′ and the via 170 ′ are shown, and other components are omitted. Figure 4 and Figure 5 The structure can be used to illustrate Figures 1 to 3 Possible implementations of the first substrate 120, the first conductive layer 150 and the conductive member 170 in the touch display panel 100.

[0042] exist Figure 4 and Figure 5In the embodiment, the first substrate 120' has an edge groove 124, and the conductive member 170' is arranged along the edge groove 124. The edge groove 124 is a concave structure located at the edge of the first substrate 120', and the edge groove 124 gives the first substrate 120' a serrated edge in a plan view. The end of the first conductive layer 150' can be flush with or adjacent to the edge groove 124. In some embodiments, the end of the first conductive layer 150' can be separated from the outermost edge of the first substrate 120' by a distance DS, and the concave depth of the edge groove 124 roughly corresponds to the distance DS. In some embodiments, the profile of the first conductive layer 150' can conform to the profile of the edge groove 124, that is, have a serrated end profile. The conductive member 170' can contact the end of the first conductive layer 150' near the edge groove 124. In some embodiments, the width W170' of the conductive member 170' can roughly correspond to the width W124 of the edge groove 124. In some embodiments, the width W170 ′ of the via 170 ′ may be greater than the width W124 of the edge groove 124 .

[0043] In summary, the touch display device in the embodiment of the present invention uses a transparent conductive material to make the first conductive layer that contacts the display medium layer, so that the first conductive layer is not easily corroded by the material of the display medium layer. In addition, the first conductive layer is a conductive layer that has both touch and sensing functions, which helps to reduce the overall thickness of the touch display device. The touch display device in the embodiment of the present invention uses a conductive member arranged along the side wall of the first substrate to electrically connect the first conductive layer on the first substrate to the second conductive layer on the second substrate. In this way, the circuit board is bonded to the second substrate instead of being bonded to the first substrate. When the driving circuit and the circuit board of the pixel array substrate are arranged on the same side, the space provided for the arrangement of the driving circuit and the circuit board is more flexible and will not interfere with each other. Since the manufacturing step of bonding the circuit board is performed on the second substrate, the components on the first substrate can be free from the temperature and / or pressure of the bonding process, which helps to maintain the quality of the components.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A touch display device, characterized in that: include: pixel array substrate; A touch substrate, the touch substrate being disposed above the pixel array substrate; A display medium layer is provided between the pixel array substrate and the touch substrate; a first conductive layer, disposed on one side of the touch substrate; A second conductive layer is disposed on the other side of the touch substrate; and The conductive element is disposed along the sidewall of the touch substrate to connect the first conductive layer and the second conductive layer.

2. The touch display device according to claim 1, wherein: The touch display device further includes a circuit board bonded to the touch substrate, electrically connected to the second conductive layer, and electrically connected to the first conductive layer through the conductive member.

3. The touch display device according to claim 1, wherein: The touch control substrate includes: a first substrate; a second substrate, wherein the first substrate is disposed between the pixel array substrate and the second substrate; a first conductive layer, disposed on the first substrate and located between the display medium layer and the first substrate; a second conductive layer disposed on the second substrate and located between the first substrate and the second substrate; and The conductive member is disposed along a side wall of the first substrate to connect the first conductive layer and the second conductive layer.

4. The touch display device according to claim 3, wherein: It also includes optical glue, which is arranged between the first substrate and the second substrate.

5. The touch display device according to claim 3, wherein: The first substrate extends beyond the display medium layer to have a protruding portion, and the conductive component is connected to the first conductive layer at the protruding portion.

6. The touch display device according to claim 3, wherein: The second substrate extends beyond the first substrate to have a protruding portion, and the conductive member is disposed along the sidewall of the first substrate and extends to the protruding portion of the second substrate.

7. The touch display device according to claim 3, wherein: The conductive member overlaps the first substrate and contacts the first conductive layer.

8. The touch display device according to claim 3, wherein: The touch display device further includes a water-blocking layer disposed on the first substrate.

9. The touch display device according to claim 1, wherein: The touch display device further includes a sealant disposed on the pixel array substrate, surrounding the display medium layer and the touch substrate, and the sealant covers the conductive element.

10. The touch display device according to claim 1, wherein: The first conductive layer includes a plurality of first strip electrodes, each of which extends along a first direction. An end of each of the first strip electrodes exceeds the display medium layer, and the conductive member contacts an end of a corresponding first strip electrode.

11. The touch display device according to claim 10, wherein: The second conductive layer includes a plurality of second strip electrodes, a plurality of pads and a plurality of transmission lines. Each of the second strip electrodes extends along a second direction and the first direction intersects with the second direction, but the first strip electrode and the second strip electrode are electrically insulated, and each of the second strip electrodes and the plurality of pads and the plurality of transmission lines are at different voltage levels.

12. The touch display device according to claim 1, wherein: The touch display device further includes a display driving circuit connected to the pixel array substrate.

Images