Touch display device

Abstract

The present application provides a touch display device including 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 driving chip and a ground line. The driving chip is disposed in the peripheral area. The ground line is disposed in the peripheral area and surrounds the display area. The ground line is connected to a ground terminal of the driving chip. The cover plate is disposed on one side of the touch display panel and overlaps the display area and the peripheral area. The conductor layer is disposed on a cover plate surface of the cover plate facing the touch display panel and overlaps at least a portion of the ground line and the driving chip.

Description

Technical Field

[0001] This invention relates to a touch display technology, and more particularly to a touch display device. Background Technology

[0002] Touch functionality has gradually become an indispensable part of many daily applications, especially in mobile devices equipped with touch display panels, such as smartphones and tablets, which are ubiquitous. To avoid interference or damage from unexpected charges, touch display devices typically have electrostatic discharge (ESD) protection circuits around the display area. However, when water droplets adhere to the cover of the touch display device and simultaneously cover both the touch display area and the ESD protection circuit distribution area, the capacitive sensing at the edge of the touch display area will abnormally increase due to the capacitive coupling effect between the water droplet and the ESD protection circuit, making the touch display panel prone to false alarms. Summary of the Invention

[0003] This invention relates to a touch display device that can simultaneously provide electrostatic protection and improve 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 conductive layer. The touch display panel has a display area and a peripheral area outside the display area, and includes a driver chip and a ground wire. The driver chip is disposed within the peripheral area. The ground wire is disposed within 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 disposed on one side of the touch display panel and overlaps the display area and the peripheral area. The conductive layer is disposed on the surface of the cover plate facing the touch display panel and overlaps at least a portion of the ground wire and the driver chip.

[0005] In a touch display device according to an embodiment of the present invention, the touch display panel further includes a common potential line disposed within a peripheral area and surrounding the display area. The common potential line is connected to the common potential terminal of the driving chip or another ground terminal. The orthographic projection of the ground line and the common potential line onto the cover plate surface lies within the orthographic projection of the conductor layer onto the cover plate surface.

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

[0007] In a 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 is disposed over an overlapping display area and is used to perform a touch detection operation 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 and the touch sensing signal have the same frequency and are synchronized.

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

[0009] In a touch display device according to an 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 a touch display device according to an 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 a touch display device according to an embodiment of the present invention, a conductor layer is connected to the common potential terminal of a driver chip.

[0012] In a touch display device according to an embodiment of the present invention, the touch display device further includes an insulating layer disposed on the side of the conductor layer opposite to the cover plate and covering the conductor layer.

[0013] In a touch display device according to an embodiment of the present invention, the touch display device further includes 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 includes an optically transparent adhesive.

[0014] In a touch display device according to an embodiment of the present invention, a 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 touch detection during the 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 the side of the first substrate facing away from the display medium layer. The second polarizer is disposed on the side of the second substrate facing away from the display medium layer.

[0016] In a touch display device according to an embodiment of the present invention, the touch display device further includes a metal back cover and a backlight module. The metal back cover has a ground potential. The backlight module is disposed between the metal back cover and the touch display panel. The metal back cover has edge portions that do not overlap with the backlight module and the touch display panel, and a conductor layer also overlaps with the edge portions 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 planarization layer. The display medium layer is disposed on a first substrate and overlaps the display area. The encapsulation layer covers the display medium layer. The touch sensing layer is disposed on the encapsulation layer and is used to perform touch detection operations within a touch time interval of one frame period. The planarization layer covers the touch sensing layer.

[0018] Based on the above, in a touch display device according to an embodiment of the present invention, a grounding wire 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 adhere to the cover plate near the edge of the display area, the overlapping arrangement of the conductor layer and at least a portion of the grounding wire effectively suppresses false alarms caused by water droplet adhesion to the touch display panel. Attached Figure Description

[0019] Figure 1 and Figure 2 This is a top view schematic diagram of a portion of the film layer 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 This is a cross-sectional schematic diagram of a comparative example of a touch display device;

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

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

[0025] Figure 10 This is a cross-sectional schematic diagram of a touch display device according to a second embodiment of the present invention;

[0026] Figure 11 yes Figure 10 A cross-sectional schematic diagram of another modified embodiment of the touch display device.

[0027] Explanation of reference numerals in the attached figures

[0028] 10, 11, 20, 20A: Touch display devices;

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

[0030] 101, 102: substrate;

[0031] 120, 120A: Display media layer;

[0032] 130: Encapsulation layer;

[0033] 140: Touch sensing layer;

[0034] 150: Driver chip;

[0035] 150ce1, 150ce2: Common potential terminals;

[0036] 150ge: Grounding terminal;

[0037] 160: Flat layer;

[0038] 170: Circuit board;

[0039] 190: Flexible circuit board;

[0040] 200: Cover plate;

[0041] 200s: Cover plate surface;

[0042] 220, 220A: Conductor layer;

[0043] 230: Adhesive layer;

[0044] 240: Insulation layer;

[0045] BC: Metal back cover;

[0046] BCp: Edge portion;

[0047] BLU: Backlight module;

[0048] CWR: Common Potential Line;

[0049] DA: Display area;

[0050] DP: Displays the time range;

[0051] FP: Frame Period;

[0052] GWR: Grounding wire;

[0053] PA: Surrounding area;

[0054] POL1, POL2: Polarizing film;

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

[0056] T: Sampling period;

[0057] TP: Touch time interval;

[0058] TS, TS-A: Touch sensing signals;

[0059] Vs, Vt: Voltage amplitude;

[0060] Vsc, Vtc: Charging voltage;

[0061] WD1, WD2: Water droplets;

[0062] X, Y, Z: Direction. Detailed Implementation

[0063] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0064] Figure 1 and Figure 2 This is a top view schematic diagram of a portion of the film layer of a 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 This is a cross-sectional schematic diagram of a comparative example of a touch display device. Figure 7 and Figure 8 yes Figure 1 and Figure 2 A schematic diagram of the touch sensing signals and shielding signals of a touch display device. For clarity, Figure 1 and Figure 2 Omitted Figure 3 The middle portion of the membrane layer is shown.

[0065] Please refer to Figure 1 To release static charge on the touch display panel 100, the touch display device 10 includes a grounding line GWR within its peripheral area PA. The grounding line GWR surrounds the display area DA and is electrically connected to the ground terminal 150ge of the driver chip 150, also located within the peripheral area PA, to connect to the ground potential. Alternatively, the touch display panel 100 may also include a common potential line CWR within its peripheral area PA, which surrounds the display area DA. In this embodiment, the common potential line CWR can be connected to the common potential terminal 150ce1 of the driver chip 150 to connect to the ground potential, but this is not a limitation. In other embodiments, the common potential line CWR may be subjected to a signal with the same waveform as the touch sensing signal.

[0066] The touch display device 10 includes a driver chip 150 disposed within the peripheral area PA. In this embodiment, the driver chip 150 may include, 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 multiple data lines (not shown) and multiple touch signal lines (not shown), and may transmit display signals to each display pixel (i.e., the aforementioned combination of active elements and pixel electrodes) via the data lines, or transmit touch sensing signals to multiple driving electrodes of the touch sensing layer 140 via the touch signal lines and receive touch sensing signals from multiple sensing electrodes.

[0067] The touch display device 10 may further include a circuit board 170 electrically connected to a driver chip 150. The circuit board 170 may be electrically connected via the driver chip 150 to a pixel driving layer (not shown), a touch sensing layer 140, a ground line GWR, and a common potential line CWR on the touch display panel 100. In this 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. A conductor layer 220 surrounds the display area DA, overlaps the peripheral area PA, and is disposed on the cover plate surface 200s of the cover plate 200 facing the touch display panel 100. In this embodiment, the conductor layer 220 may be formed directly 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] Of particular note is that the conductor layer 220 overlaps the ground wire GWR and the common potential line CWR along the normal direction (e.g., direction Z) of the cover plate surface 200s. For example, in this embodiment, the conductor layer 220 can completely cover the ground wire GWR and the common potential line CWR. That is, the orthogonal projection of the ground wire GWR and the common potential line CWR on the cover plate surface 200s is within the orthogonal projection of the conductor layer 220 on the cover plate surface 200s.

[0070] The material of the conductor layer 220 includes, for example, indium tin oxide (ITO), nano-silver, or other suitable metal oxides. In order to allow static charges on the touch display panel 100 to be discharged via the ground line GWR and / or the common potential line CWR, the impedance of the conductor layer 220 may be greater than the impedance of the ground line GWR and / or the common potential line 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, and polarizers POL1 and 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 substrates 101 and 102 and overlaps the display area DA. Polarizer POL1 is disposed on the side of the substrate 101 opposite to the display medium layer 120. Polarizer POL2 is disposed on the side of the substrate 102 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 one frame period. In this embodiment, the touch sensing layer 140 may be disposed on the substrate 101, and an overlapping display area DA is provided. 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 driving 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 driving electrodes are respectively connected in series with each other via these touch signal lines.

[0073] On the other hand, since the touch display panel 100 in this embodiment uses a non-self-emissive display panel, the touch display device 10 may also 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 this embodiment, the metal back cover BC may have a portion BCP that does not overlap with the edge portion BCP of the backlight module BLU and the touch display panel 100 (i.e., the portion of the metal back cover BC that protrudes from the edge of the backlight module BLU and the touch display panel 100 along the Y direction).

[0074] Since the metal back cover BC in this embodiment has a ground potential, without the conductor layer 220, the capacitive coupling effect between the water droplet WD2 and the metal back cover BC would inevitably cause an abnormal increase in the capacitive sensing amount between the water droplet WD2 and the touch sensing layer 140. Therefore, in this embodiment, the conductor layer 220 can also be superimposed on the edge portion BCp of the metal back cover BC.

[0075] In this embodiment, the display medium layer 120 is, for example, a liquid crystal layer. That is, the touch display panel 100 in this embodiment can 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. The pixel driving layer may include multiple signal lines (e.g., scan lines and data lines), multiple active elements (e.g., thin-film transistors), and multiple pixel electrodes. Each active element is electrically connected to a corresponding pixel electrode, a scan line, and a data line. The active elements and pixel electrodes electrically connected to each other can constitute a display pixel.

[0076] In this embodiment, the conductor layer 220 can completely cover the peripheral area PA of the substrate 101. Therefore, regardless of where the water droplet adheres at the junction of the display area DA and the peripheral area PA, the conductor layer 220 can effectively suppress the capacitive coupling between the water droplet and the ground line GWR, common potential line CWR and driver chip 150 on the substrate 101, thereby improving the accuracy and reliability of the touch reporting of the touch display device 10.

[0077] Please refer to Figure 5 and Figure 6 First, it should be noted that in a comparative example of the touch display device 11, the cover plate 200 does not have the conductor layer 220 of this embodiment. Therefore, when a water droplet adheres to the cover plate 200 near the edge of the display area DA, for example, when the touch sensing layer 140, the ground line GWR, and the common potential line CWR overlap (such as the location of the water droplet WD1), the ground line GWR and the common potential line CWR will each generate a capacitive coupling effect with the water droplet WD1, causing an abnormal increase in the capacitive sensing amount between the water droplet WD1 and the touch sensing layer 140, resulting in a false alarm.

[0078] However, in this embodiment, since the touch display device 10 has a conductor layer 220 on the cover plate 200 corresponding to the peripheral area PA, the water droplet WD1 cannot be coupled to the ground line GWR and the common potential line CWR capacitor on the substrate 101 (e.g. Figure 4 (As shown). That is to say, Figure 5 In the comparative example, the capacitive coupling effect between the water droplet WD1 and the ground wire GWR or the common potential line CWR is replaced by the capacitive coupling effect between the conductor layer 220 and the water droplet WD1 in this embodiment.

[0079] Please refer to Figure 3 , Figure 4 and Figure 7For example, within the touch time interval TP of one frame period FP, the touch sensing layer 140 is applied with a touch sensing signal TS, while the conductor layer 220 is applied with a shielding signal SS. It is particularly noteworthy that the shielding signal SS and the touch sensing signal TS have the same frequency and are synchronized. That is, the period of the shielding signal SS is the same as the sampling period T of the touch sensing signal TS. Furthermore, within 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. Specifically, within the display time interval DP of one 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 conductor layer 220 is substantially the same as the touch sensing signal TS applied to the touch sensing layer 140.

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

[0081] However, the present invention is not limited thereto. In another modified embodiment, considering the resistance-capacitance loading effect of the actual circuit, the waveforms of the touch sensing signal TS-A and the shielding signal SS-A within the touch time interval TP are not perfect square waves (e.g., Figure 8 (As shown). For example, the resistive-capacitive load effect experienced by the shielding signal SS-A may be different from (e.g., greater than) the resistive-capacitive load effect experienced 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 nearly identical, 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 conductor layer 220 may be different from (e.g., greater than) the charging start voltage Vtc of the touch sensing layer 140.

[0082] The following examples illustrate this disclosure in detail, wherein the same components will be labeled with the same symbols, and descriptions of the same technical content will be omitted. For the omitted parts, please refer to the foregoing examples, which will not be repeated below.

[0083] Figure 9 yes Figure 2 A top view schematic diagram of another modified embodiment of the conductor layer. Please refer to... Figure 9 Unlike Figure 2 The conductor layer 220A in this embodiment does not completely cover the peripheral area PA of the substrate 101. More specifically, the conductor layer 220A only covers the area within the peripheral area PA where the driver chip 150 is located, i.e. Figure 9 The PA region in the middle peripheral area is located in the area below the DA region. In other words, 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 to the droplet capacitor, and the present invention does not impose any limitations on this.

[0084] Figure 10 This is a cross-sectional schematic diagram of a touch display device according to a second embodiment of the present invention. Please refer to... Figure 10 The touch display device 20 in this embodiment and Figure 3 The main difference between the touch display device 10 and the other one is the type of touch display panel. Specifically, in this embodiment, the touch display panel 100A is, for example, a self-emissive display panel. That is, the display medium layer 120A in this embodiment can be an organic light-emitting diode (OLED).

[0085] In detail, in this embodiment, the touch display panel 100A may include an encapsulation layer 130 to cover the display medium layer 120A. The touch sensing layer 140 may be directly disposed on the encapsulation layer 130, and a planarization layer 160 may be covered thereon. That is to say, the touch display panel 100A in this embodiment may be a Y-OCTA touch display panel, but is not limited thereto.

[0086] Specifically, in this embodiment, to ensure electrical insulation between the conductor layer 220 on the cover plate 200 and the touch display panel 100A, the touch display device 20 may further include an insulating layer 240, disposed on the side of the conductor layer 220 facing away from the cover plate 200, and covering the conductor layer 220. The material of the insulating layer 240 includes, for example, silicon oxide, silicon nitride, silicon oxynitride, or other suitable insulating materials. Similarly, in Figure 3 In the touch display device 10, an insulating layer may also be provided between the conductor layer 220 and the touch display panel 100.

[0087] Figure 11 yes Figure 10 A cross-sectional schematic diagram of another modified embodiment of the touch display device. Please refer to... Figure 11 Compared to Figure 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 plate surface 200s by means of the adhesive layer 230. The material of the adhesive layer 230 may include, for example, optically clear adhesive (OCA) or other suitable adhesives.

[0088] In summary, in a touch display device according to an embodiment of the present invention, a grounding wire surrounding the display area is provided in the peripheral area of ​​the touch display panel. A conductive layer is provided on the surface of the cover plate facing the touch display panel. When water droplets adhere to the cover plate near the edge of the display area, the overlapping arrangement of the conductive layer and at least a portion of the grounding wire effectively suppresses false alarms caused by water droplet adhesion to the touch display panel.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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 includes a display area and a peripheral area outside the display area, and further includes: The driver chip is located within the peripheral area; A grounding wire is disposed within the peripheral area and surrounds the display area, and the grounding wire is connected to the ground terminal of the driver chip; A common potential line is disposed within the peripheral area and surrounds the display area; the common potential line is connected to the common potential terminal of the driver chip or another ground terminal; and A touch sensing layer is disposed overlapping the display area and is used to perform touch detection actions within the touch time interval of the frame period; A cover plate is disposed on one side of the touch display panel and overlaps the display area and the peripheral area; and A conductor layer is disposed on the surface of the cover plate facing the touch display panel. The conductor layer overlaps at least a portion of the ground wire and the driving chip. The impedance of the conductor layer is greater than the impedance of the ground wire or the common potential line. During 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 it. The slew rate of the shielding signal is different from the slew rate of the touch sensing signal. During the display time interval of the frame period, the shielding signal and the touch sensing signal have the same DC voltage level or ground potential.

2. The touch display device according to claim 1, characterized in that, The orthographic projection of the grounding wire and the common potential wire onto the surface of the cover plate lies within the orthographic projection of the conductor layer onto the surface of the cover plate.

3. The touch display device according to claim 1, characterized in that, During the sampling period of the touch time interval, the voltage amplitude of the shielding signal is the same as that of the touch sensing signal.

4. The touch display device according to claim 1, characterized in that, The charging start voltage of the conductor layer is greater than the charging start voltage of the touch sensing layer.

5. The touch display device according to claim 1, characterized in that, The conductor layer is connected to the common potential terminal of the driver chip.

6. The touch display device according to claim 1, characterized in that, Also includes: An insulating layer is disposed on the side of the conductor layer opposite to the cover plate and covers the conductor layer.

7. The touch display device according to claim 1, characterized in that, Also includes: An 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 an optically transparent adhesive.

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

9. 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 disposed overlapping the display area and is used to perform touch detection actions within the touch time interval of the frame period; The second substrate is disposed on top of the first substrate, and the display medium layer is disposed between the first substrate and the second substrate; A first polarizer is disposed on the side of the first substrate opposite to the display medium layer; and The second polarizer is disposed on the side of the second substrate opposite to the display medium layer.

10. The touch display device according to claim 9, characterized in that, Also includes: Metal back cover with grounding potential; as well as A backlight module is disposed 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 edge portion of the backlight module and the touch display panel, and the conductor layer also overlaps with the edge portion of the metal back cover.

11. 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 is used to cover the display medium layer; A touch sensing layer, disposed on the encapsulation layer, is used to perform touch detection actions within the touch time interval of the frame period; and A flat layer that covers the touch sensing layer.

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