Touch display device

Abstract

The invention provides a touch display device which comprises a touch display panel, a cover plate and a conductor layer. The touch display panel is provided with a display area and a peripheral area outside the display area, and comprises a driving chip and a grounding wire. The driving chip is arranged in the peripheral area. The grounding wire is arranged in the peripheral area and surrounds the display area. The grounding wire is connected with the grounding end of the driving chip. The cover plate is arranged on one side of the touch display panel and overlaps the display area and the peripheral area. The conductor layer is arranged on the cover plate surface, facing the touch display panel, of the cover plate and overlaps at least one part of the grounding wire and the driving chip.

Description

Technical Field

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

[0002] Touch functions have gradually become an indispensable part of many daily life applications, especially mobile devices equipped with touch display panels, such as smart phones and tablet computers, which can be seen everywhere. In order to avoid interference or damage from unexpected charges, touch display devices are generally equipped with electrostatic discharge (ESD) protection circuits around the display area. However, when water droplets are adsorbed on the cover of the touch display device and the water droplets cover the distribution area of ​​the touch display area and the ESD protection circuit at the same time, the capacitive induction at the edge of the touch display area will increase abnormally due to the capacitive coupling effect between the water droplets and the ESD protection circuit, making the touch display panel prone to false alarm points. Summary of the invention

[0003] The present invention is directed to a touch display device which can simultaneously take into account the function of electrostatic protection and the accuracy of touch reporting.

[0004] According to an embodiment of the present invention, a touch display device includes a touch display panel, a cover plate and a conductor layer. The touch display panel is provided with a display area and a peripheral area outside the display area, and includes a driver chip and a ground wire. The driver chip is arranged in the peripheral area. The ground wire is arranged in the peripheral area and surrounds the display area. The ground wire is connected to the ground terminal of the driver chip. The cover plate is arranged on one side of the touch display panel and overlaps the display area and the peripheral area. The conductor layer is arranged on the cover plate surface facing the touch display panel, and overlaps at least a portion of the ground wire and the driver chip.

[0005] In the touch display device according to an embodiment of the present invention, the touch display panel further includes a common potential line, which is arranged in the peripheral area and surrounds the display area. The common potential line is connected to the common potential terminal or another ground terminal of the driver chip. The orthographic projections of the ground line and the common potential line on the cover surface are located within the orthographic projection of the conductor layer on the cover surface.

[0006] In the touch display device according to the embodiment of the present invention, the impedance of the conductor layer is greater than the impedance of the ground line or the common potential line.

[0007] In the touch display device according to an embodiment of the present invention, the touch display panel further includes a touch sensing layer. The touch sensing layer overlaps the display area and is used to perform touch detection actions within a touch time interval of a frame period. Within the touch time interval, a touch sensing signal is applied to the touch sensing layer, and a shielding signal is applied to the conductor layer. The shielding signal has the same frequency as the touch sensing signal and is synchronized with each other.

[0008] In the touch display device according to the embodiment of the present invention, within the sampling period of the touch time interval, the voltage amplitudes of the shielding signal and the touch sensing signal are the same.

[0009] In the touch display device according to the embodiment of the present invention, the slew rate of the shielding signal is different from the slew rate of the touch sensing signal.

[0010] In the touch display device according to the embodiment of the present invention, the charging start voltage of the conductor layer is greater than the charging start voltage of the touch sensing layer.

[0011] In the touch display device according to the embodiment of the present invention, the conductor layer is connected to the common potential terminal of the driving chip.

[0012] In the touch display device according to the embodiment of the present invention, the touch display device further includes an insulating layer, which is disposed on a side of the conductor layer facing away from the cover plate and covers the conductor layer.

[0013] In the touch display device according to the embodiment of the present invention, the touch display device further comprises an adhesive layer. The conductor layer is attached to the surface of the cover plate via the adhesive layer, and the material of the adhesive layer comprises optically transparent adhesive.

[0014] In the touch display device according to the embodiment of the present invention, the conductor layer surrounds the display area.

[0015] In a touch display device according to an embodiment of the present invention, the touch display panel further includes a display medium layer, a touch sensing layer, a second substrate, a first polarizer, and a second polarizer. The display medium layer is disposed on the first substrate and overlaps the display area. The touch sensing layer overlaps the display area and is used to perform a touch detection action within a touch time interval of a frame period. The second substrate overlaps the first substrate. The display medium layer is disposed between the first substrate and the second substrate. The first polarizer is disposed on a side of the first substrate that is opposite to the display medium layer. The second polarizer is disposed on a side of the second substrate that is opposite to the display medium layer.

[0016] In the touch display device according to the embodiment of the present invention, the touch display device further comprises a metal back cover and a backlight module. The metal back cover has a ground potential. The backlight module is arranged between the metal back cover and the touch display panel. The metal back cover has an edge portion that does not overlap with the backlight module and the touch display panel, and the conductor layer also overlaps with the edge portion of the metal back cover.

[0017] In a touch display device according to an embodiment of the present invention, the touch display panel further includes a display medium layer, an encapsulation layer, a touch sensing layer and a planar layer. The display medium layer is disposed on the first substrate and overlaps the display area. The encapsulation layer is used to cover the display medium layer. The touch sensing layer is disposed on the encapsulation layer and is used to perform a touch detection action within a touch time interval of a frame period. The planar layer covers the touch sensing layer.

[0018] Based on the above, in a touch display device of an embodiment of the present invention, a grounding line surrounding the display area is provided in the peripheral area of ​​the touch display panel. The cover plate is provided with a conductor layer on the surface of the cover plate facing the touch display panel. When water droplets are adsorbed on the cover plate near the edge of the display area, the overlapping arrangement of the conductor layer and at least part of the grounding line can effectively suppress the generation of false alarm points on the touch display panel due to the adsorption of water droplets. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 and Figure 2 is a schematic top view of a portion of film layers of a touch display device according to a first embodiment of the present invention;

[0020] Figure 3 yes Figure 1 and Figure 2 A cross-sectional schematic diagram of a touch display device;

[0021] Figure 4 yes Figure 1 and Figure 2 A cross-sectional schematic diagram of a touch display device;

[0022] Figure 5 and Figure 6 is a cross-sectional schematic diagram of a touch display device of a comparative example;

[0023] Figure 7 and Figure 8 yes Figure 1 and Figure 2 A schematic diagram of a touch sensing signal and a shielding signal of a touch display device;

[0024] Fig. 9 yes Figure 2 A schematic top view of another modified embodiment of the conductor layer;

[0025] Fig.10 is a schematic cross-sectional view of a touch display device according to a second embodiment of the present invention;

[0026] Fig.11 yes Fig.10 A cross-sectional schematic diagram of another modified implementation manner of a touch display device.

[0027] Description of Reference Numerals

[0028] 10, 11, 20, 20A: touch display device;

[0029] 100, 100A: touch display panel;

[0030] 101, 102: substrate;

[0031] 120, 120A: display medium layer;

[0032] 130: encapsulation layer;

[0033] 140: touch sensing layer;

[0034] 150: driver chip;

[0035] 150ce1, 150ce2: common potential terminal;

[0036] 150ge: ground terminal;

[0037] 160: flat layer;

[0038] 170: Circuit board;

[0039] 190: Flexible circuit board;

[0040] 200: cover plate;

[0041] 200s: cover surface;

[0042] 220, 220A: conductor layer;

[0043] 230: adhesive layer;

[0044] 240: insulation layer;

[0045] BC: Metal back cover;

[0046] BCp: marginal part;

[0047] BLU: Backlight unit;

[0048] CWR: common potential line;

[0049] DA: display area;

[0050] DP: Display time interval;

[0051] FP: frame period;

[0052] GWR: ground wire;

[0053] PA: peripheral area;

[0054] POL1, POL2: polarizer;

[0055] SS, SS-A: shielding signal;

[0056] T: sampling period;

[0057] TP: touch time interval;

[0058] TS, TS-A: touch sensing signal;

[0059] Vs, Vt: voltage amplitude;

[0060] Vsc, Vtc: charging voltage;

[0061] WD1, WD2: water droplets;

[0062] X, Y, Z: direction. DETAILED DESCRIPTION

[0063] 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.

[0064] Figure 1 and Figure 2 FIG. 1 is a schematic top view of a part of the film layers of the touch display device according to the first embodiment of the present invention. Figure 3 yes Figure 1 and Figure 2 A cross-sectional schematic diagram of a touch display device. Figure 4 yes Figure 1 and Figure 2 A cross-sectional schematic diagram of a touch display device. Figure 5 and Figure 6 is a cross-sectional schematic diagram of a touch display device of a comparative example. Figure 7 and Figure 8 yes Figure 1 and Figure 2 Schematic diagram of touch sensing signals and shielding signals of a touch display device. For the sake of clarity, Figure 1 and Figure 2 Omitted Figure 3 The middle part of the film layer is shown.

[0065] Please refer to Figure 1 In order to release the static charge on the touch display panel 100, the touch display device 10 is provided with a ground wire GWR in the peripheral area PA of the touch display panel 100. The ground wire GWR can surround the display area DA and be electrically connected to the ground terminal 150ge of the driver chip 150 which is also located in the peripheral area PA to be electrically connected to the ground potential. On the other hand, the touch display panel 100 can also be provided with a common potential line CWR in the peripheral area PA of the touch display panel 100, and the common potential line CWR can surround the display area DA. In the present embodiment, the common potential line CWR can be connected to the common potential terminal 150ce1 of the driver chip 150 to be electrically connected to the ground potential, but is not limited thereto. In other embodiments, the common potential line CWR can also be applied with a signal with the same waveform as the touch sensing signal.

[0066] The touch display device 10 includes a driver chip 150 disposed in the peripheral area PA. In the present embodiment, the driver chip 150 includes, for example, a touch display driver integrated circuit (TDDI), but is not limited thereto. For example, the driver chip 150 may be electrically connected to the aforementioned plurality of data lines (not shown) and a plurality of touch signal lines (not shown), and transmit the display signal to each display pixel (i.e., a combination of the aforementioned active element and the pixel electrode) via the data line, or transmit the touch sensing signal to the plurality of driving electrodes of the touch sensing layer 140 via the touch signal line and receive the touch sensing signal from the plurality of sensing electrodes.

[0067] The touch display device 10 may further include a circuit board 170 electrically connected to the driver chip 150. The circuit board 170 may be electrically connected to a pixel driving layer (not shown), a touch sensing layer 140, a ground wire GWR, and a common potential wire CWR on the touch display panel 100 via the driver chip 150. In the present embodiment, the circuit board 170 is, for example, a flexible printed circuit board (FPCB), but is not limited thereto.

[0068] Please refer to Figure 2 , Figure 3 The touch display device 10 includes a touch display panel 100 and a cover plate 200. The cover plate 200 is disposed on one side of the display surface of the touch display panel 100 and overlaps the display area DA and the peripheral area PA. The conductor layer 220 may surround the display area DA, overlap the peripheral area PA and be disposed on a cover plate surface 200s of the cover plate 200 facing the touch display panel 100. In the present embodiment, the conductor layer 220 may be directly formed on the cover plate surface 200s, but is not limited thereto. The conductor layer 220 may be connected to the common potential terminal 150ce2 of the driver chip 150.

[0069] It is particularly noted that the conductor layer 220 overlaps the ground line GWR and the common potential line CWR along the normal direction (e.g., direction Z) of the cover surface 200s. For example, in this embodiment, the conductor layer 220 can completely cover the ground line GWR and the common potential line CWR. That is, the orthographic projections of the ground line GWR and the common potential line CWR on the cover surface 200s are within the orthographic projection of the conductor layer 220 on the cover surface 200s.

[0070] The material of the conductor layer 220 includes, for example, indium tin oxide (ITO), nanosilver, or other suitable metal oxides. In order to allow the static charge on the touch display panel 100 to be discharged through the ground wire GWR and / or the common potential wire CWR, the impedance of the conductor layer 220 can be greater than the impedance of the ground wire GWR and / or the common potential wire CWR.

[0071] Please refer to Figure 3 The touch display panel 100 may include a substrate 101, a substrate 102, a display medium layer 120, a polarizer POL1, and a polarizer POL2. The substrate 101 has a display area DA and a peripheral area PA outside the display area DA. The display medium layer 120 is disposed between the substrate 101 and the substrate 102 and overlaps the display area DA. The polarizer POL1 is disposed on the side of the substrate 101 that is opposite to the display medium layer 120. The polarizer POL2 is disposed on the side of the substrate 102 that is opposite to the display medium layer 120.

[0072] On the other hand, the touch display panel 100 also includes a touch sensing layer 140 for performing touch detection actions within a touch time interval of a frame period. In the present embodiment, the touch sensing layer 140 may be disposed on the substrate 101 and overlapped with the display area DA. More specifically, the touch sensing layer 140 is located between the substrate 101 and the substrate 102, and is integrated with the aforementioned pixel driving layer to form an in-cell touch display panel 100. However, the present invention is not limited thereto. In other embodiments, the touch display panel may be an out-cell or on-cell touch display panel. For example, the touch sensing layer 140 may include a plurality of drive electrodes (not shown), a plurality of sensing electrodes (not shown) and a plurality of touch signal lines (not shown), and these sensing electrodes and these drive electrodes are connected in series with each other via these touch signal lines, respectively.

[0073] On the other hand, since the touch display panel 100 of the present embodiment adopts a non-self-luminous display panel for display, the touch display device 10 may further include a backlight module BLU, and a metal back cover BC is provided on the side of the backlight module BLU facing away from the touch display panel 100. In the present embodiment, the metal back cover BC may have an edge portion BCp that does not overlap the backlight module BLU and the touch display panel 100 (i.e., the portion of the metal back cover BC protruding from the edge of the backlight module BLU and the touch display panel 100 along the direction Y).

[0074] Since the metal back cover BC of the present embodiment has a ground potential, if the conductive layer 220 is not provided, the capacitive coupling effect generated between the water drop WD2 and the metal back cover BC will inevitably cause an abnormal increase in the capacitive induction between the water drop WD2 and the touch sensing layer 140. Therefore, in the present embodiment, the conductive layer 220 may also overlap the edge portion BCp of the metal back cover BC.

[0075] In the present embodiment, the display medium layer 120 is, for example, a liquid crystal layer. That is, the touch display panel 100 of the present embodiment may be a liquid crystal display panel, but is not limited thereto. For example, a pixel driving layer (not shown) may be provided on the substrate 101, and the pixel driving layer may include a plurality of signal lines (such as scan lines and data lines), a plurality of active components (such as thin film transistors) and a plurality of pixel electrodes. Each active component is electrically connected to a corresponding pixel electrode, a scan line and a data line. The active components and pixel electrodes electrically connected to each other may constitute a display pixel.

[0076] In this embodiment, the conductive layer 220 can completely cover the peripheral area PA of the substrate 101. Therefore, no matter where the water droplets are adsorbed on the boundary between the display area DA and the peripheral area PA, the conductive layer 220 can effectively suppress the capacitive coupling between the water droplets and the ground wire GWR, the common potential wire CWR and the driver chip 150 on the substrate 101, thereby improving the accuracy and reliability of the touch reporting point of the touch display device 10.

[0077] Please refer to Figure 5 and Figure 6 First, it is explained that in a comparative example of the touch display device 11, the conductor layer 220 of the present embodiment is not provided on the cover plate 200. Therefore, when a water droplet is adsorbed on the cover plate 200 at a position close to the edge of the display area DA, for example, the positions of the touch sensing layer 140, the ground wire GWR and the common potential wire CWR (such as the position of the water droplet WD1) are overlapped at the same time, the ground wire GWR and the common potential wire CWR will each generate a capacitive coupling effect with the water droplet WD1, resulting in an abnormal increase in the capacitive induction between the water droplet WD1 and the touch sensing layer 140, thereby generating a false alarm point.

[0078] However, in this embodiment, since the touch display device 10 has a conductive layer 220 on the cover plate 200 corresponding to the peripheral area PA, the water droplet WD1 cannot be capacitively coupled with the ground line GWR and the common potential line CWR on the substrate 101 (eg Figure 4 That is, Figure 5 The capacitive coupling effect between the water droplet WD1 and the ground line GWR or the common potential line CWR in the comparative example is replaced by the capacitive coupling effect between the conductive layer 220 and the water droplet WD1 in the present embodiment.

[0079] Please refer to Figure 3 , Figure 4 and Figure 7For example, in a touch time interval TP of a frame period FP, the touch sensing layer 140 is applied with a touch sensing signal TS, and the conductive layer 220 is applied with a shielding signal SS. It is particularly noted that the shielding signal SS and the touch sensing signal TS have the same frequency and are synchronized with each other. That is, the period of the shielding signal SS is the same as the sampling period T of the touch sensing signal TS. In addition, in each sampling period T of the touch time interval TP, the voltage amplitude Vs of the shielding signal SS and the voltage amplitude Vt of the touch sensing signal TS may be the same or similar. It is particularly noted that in a display time interval DP of a frame period FP, the shielding signal SS and the touch sensing signal TS also have the same DC voltage level or ground potential. In other words, the shielding signal SS applied to the conductive layer 220 is substantially the same as the touch sensing signal TS applied to the touch sensing layer 140.

[0080] Since the conductive layer 220 is subjected to the shielding signal SS which is the same as the touch sensing signal TS during the touch time interval TP, the capacitive coupling effect between the water drop WD1 and the conductive layer 220 will not cause a change in the capacitive sensing value between the water drop WD1 and the touch sensing layer 140 , thereby helping to improve the accuracy and reliability of the touch reporting point of the touch display device 10 .

[0081] However, the present invention is not limited thereto. In another variant implementation, if the resistance-capacitance loading effect of the actual circuit is taken into consideration, the waveforms of the touch sensing signal TS-A and the shielding signal SS-A in the touch time interval TP are not perfect square waves (e.g. Figure 8 ). For example, the resistance-capacitance load effect borne by the shielding signal SS-A may be different from (e.g., greater than) the resistance-capacitance load effect borne by the touch sensing signal TS-A. Therefore, the slew rate of the shielding signal SS-A may be different from (e.g., greater than) the slew rate of the touch sensing signal TS-A, so that the waveforms of the touch sensing signal TS-A and the shielding signal SS-A are close to each other, and the voltage Vs of the shielding signal SS-A is equal to the Vt of the touch sensing signal TS-A. In another embodiment, the charging start voltage Vsc of the conductive layer 220 may be different from (e.g., greater than) the charging start voltage Vtc of the touch sensing layer 140.

[0082] Other embodiments will be listed below to explain the present disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the aforementioned embodiments and will not be repeated below.

[0083] Fig. 9 yes Figure 2 A top view schematic diagram of another variant implementation of the conductor layer. Fig. 9 , different from Figure 2 The conductor layer 220A of this embodiment does not completely cover the peripheral area PA of the substrate 101. More specifically, the conductor layer 220A only covers the area in the peripheral area PA where the driver chip 150 is located, that is, Fig. 9 The middle peripheral area PA is located below the display area DA. That is, the distribution area of ​​the conductor layer on the cover plate 200 can be adjusted according to the position of the electronic components on the substrate 101 that are more easily coupled with the water droplet capacitance, and the present invention is not limited thereto.

[0084] Fig.10 is a cross-sectional view of a touch display device according to a second embodiment of the present invention. Fig.10 The touch display device 20 of this embodiment and Figure 3 The main difference between the touch display device 10 and the touch display device 10 is that the types of touch display panels are different. Specifically, in this embodiment, the touch display panel 100A is, for example, a self-luminous display panel. That is, the display medium layer 120A of this embodiment can be an organic light emitting diode (OLED).

[0085] Specifically, in this embodiment, the touch display panel 100A may include an encapsulation layer 130 for covering the display medium layer 120A. The touch sensing layer 140 may be directly disposed on the encapsulation layer 130, and covered with a flat layer 160. That is, the touch display panel 100A of this embodiment may be a Y-OCTA touch display panel, but is not limited thereto.

[0086] It is particularly noted that in this embodiment, in order to ensure that the conductive layer 220 on the cover plate 200 is electrically insulated from the touch display panel 100A, the touch display device 20 may further include an insulating layer 240, which is disposed on the side of the conductive layer 220 facing away from the cover plate 200 and covers the conductive layer 220. The material of the insulating layer 240 includes, for example, silicon oxide, silicon nitride, silicon oxynitride, or other suitable insulating materials. Figure 3 In the touch display device 10 , an insulating layer may also be disposed between the conductive layer 220 and the touch display panel 100 .

[0087] Fig.11 yes Fig.10 A cross-sectional schematic diagram of another variant implementation of the touch display device. Fig.11 , compared to Fig.10The touch display device 20A of this embodiment may further include an adhesive layer 230, and the conductor layer 220 may be attached to the cover surface 200s by the adhesive layer 230. The material of the adhesive layer 230 may include, for example, optical clear adhesive (OCA) or other suitable adhesive materials.

[0088] In summary, in a touch display device according to an embodiment of the present invention, a grounding line surrounding the display area is provided in the peripheral area of ​​the touch display panel. A conductor layer is provided on the cover plate surface facing the touch display panel. When water droplets are adsorbed on the cover plate near the edge of the display area, the overlapping arrangement of the conductor layer and at least part of the grounding line can effectively suppress the generation of false alarm points on the touch display panel due to the adsorption of water droplets.

[0089] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned 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: A touch display panel is provided with a display area and a peripheral area outside the display area, and includes: A driving chip is disposed in the peripheral area; and A grounding line, arranged in the peripheral area and surrounding the display area, the grounding line being connected to a ground terminal of the driving chip; a cover plate, disposed on one side of the touch display panel and overlapping the display area and the peripheral area; and The conductor layer is disposed on a surface of the cover plate facing the touch display panel, and the conductor layer overlaps at least a portion of the ground line and the driving chip.

2. The touch display device according to claim 1, characterized in that: The touch display panel also includes: A common potential line is arranged in the peripheral area and surrounds the display area. The common potential line is connected to the common potential end or another ground end of the driving chip, wherein the orthographic projection of the ground line and the common potential line on the surface of the cover plate is located within the orthographic projection of the conductor layer on the surface of the cover plate.

3. The touch display device according to claim 2, characterized in that: The impedance of the conductor layer is greater than the impedance of the ground line or the common potential line.

4. The touch display device according to claim 1, characterized in that: The touch display panel also includes: The touch sensing layer is arranged to overlap the display area and is used to perform touch detection actions within a touch time interval of a frame period, wherein within the touch time interval, the touch sensing layer is applied with a touch sensing signal, and the conductor layer is applied with a shielding signal, and the shielding signal has the same frequency as the touch sensing signal and is synchronized with each other.

5. The touch display device according to claim 4, characterized in that: In a sampling period of the touch time interval, the voltage amplitude of the shielding signal is the same as that of the touch sensing signal.

6. The touch display device according to claim 4, characterized in that: The slew rate of the shielding signal is different from the slew rate of the touch sensing signal.

7. The touch display device according to claim 4, characterized in that: A charging start voltage of the conductor layer is greater than a charging start voltage of the touch sensing layer.

8. The touch display device according to claim 1, characterized in that: The conductor layer is connected to the common potential end of the driving chip.

9. The touch display device according to claim 1, characterized in that: Also includes: The insulating layer is arranged on a side of the conductor layer facing away from the cover plate and covers the conductor layer.

10. The touch display device according to claim 1, characterized in that: Also includes: The adhesive layer, wherein the conductor layer is attached to the surface of the cover plate via the adhesive layer, and the material of the adhesive layer includes optically transparent glue.

11. The touch display device according to claim 1, characterized in that: The conductor layer surrounds the display area.

12. The touch display device according to claim 1, characterized in that: The touch display panel also includes: A display medium layer is disposed on the first substrate and overlaps the display area; A touch sensing layer is arranged overlapping the display area and is used to perform a touch detection action within a touch time interval of a frame period; A second substrate is arranged overlapping the first substrate, and the display medium layer is arranged between the first substrate and the second substrate; A first polarizer is disposed on a side of the first substrate facing away from the display medium layer; and The second polarizer is arranged on a side of the second substrate facing away from the display medium layer.

13. The touch display device according to claim 12, characterized in that: Also includes: Metal back cover with ground potential; as well as The backlight module is arranged between the metal back cover and the touch display panel, wherein the metal back cover has an edge portion that does not overlap with the backlight module and the touch display panel, and the conductor layer also overlaps with the edge portion of the metal back cover.

14. The touch display device according to claim 1, characterized in that: The touch display panel also includes: A display medium layer is disposed on the first substrate and overlaps the display area; An encapsulation layer, used for covering the display medium layer; A touch sensing layer, disposed on the packaging layer, and used to perform a touch detection action within a touch time interval of a frame period; and The flat layer covers the touch sensing layer.

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