Integrated panel driving method for touch and display drivers

Abstract

This invention discloses a Touch and Display Driver Integration (TDDI) panel driving method, comprising the following steps: (a) the TDDI driver integrated circuit is coupled to an appropriate voltage via external wiring, thereby enabling the TDDI driver integrated circuit to avoid the process maximum voltage limit; and (b) a voltage required for the operation of the gate driver integrated circuit is generated between the first and second terminals of the gate driver integrated circuit.

Description

Technical Field

[0001] This invention relates to panel driving, and more particularly to a touch and display driver integrated (TDD I) panel driving method. Background Technology

[0002] Generally speaking, when the TDD I driver integrated circuit operates on the panel, the touch signal generated by the touch will increase the voltage, which will reduce the operating voltage range of the maximum process voltage. As a result, the TDD I driver integrated circuit cannot operate at the maximum withstand voltage of the device when it is in co-driving operation during touch.

[0003] For example, if the maximum withstand voltage of the MOS transistor element of the TDDI driver integrated circuit is 32V, the TDDI driver integrated circuit cannot operate at the maximum withstand voltage of 32V during touch, but can only operate at the maximum process voltage of 27V to 28V, which is 4V to 5V lower than the maximum withstand voltage of 32V.

[0004] However, if the operating voltage of the gate driver integrated circuit (e.g., 32V or above) exceeds the maximum process voltage (e.g., 27V to 28V), the TDDI driver integrated circuit cannot be used. This problem urgently needs to be addressed. Summary of the Invention

[0005] Therefore, this invention proposes a panel driving method that integrates touch and display drivers to effectively solve the above-mentioned problems encountered in the prior art.

[0006] According to a preferred embodiment of the present invention, a touch and display driver integrated (TDDI) panel driving method is provided, comprising the following steps: (a) the TDDI driver integrated circuit is coupled to an appropriate voltage via external wiring, thereby causing the TDDI driver integrated circuit to avoid the process maximum voltage limit; and (b) a voltage required for the operation of the gate driver integrated circuit is generated between a first terminal and a second terminal of the gate driver integrated circuit.

[0007] In one embodiment, a first terminal of a gate driver integrated circuit is connected to a first external voltage but is not driven by it, and a second terminal of the gate driver integrated circuit is coupled to a TDDI driver integrated circuit and receives a second external voltage that is driven by it. The second external voltage is generated internally by the TDDI driver integrated circuit or generated by the TDDI driver integrated circuit based on an external low voltage.

[0008] In one embodiment, the TDDI driver integrated circuit controls the operation of an external switch such that a first external voltage connected to a first terminal of the gate driver integrated circuit is co-driven, and a second terminal of the gate driver integrated circuit is coupled to the TDDI driver integrated circuit and receives a second external voltage co-driven. The second external voltage is generated internally by the TDDI driver integrated circuit or generated by the TDDI driver integrated circuit based on an external low voltage.

[0009] In one embodiment, a first external voltage is connected to the first terminal of the gate driver integrated circuit but is not driven by it, and the TDDI driver integrated circuit controls the operation of the external switch SW so that the second external voltage connected to the second terminal of the gate driver integrated circuit is driven by it.

[0010] In one embodiment, the TDDI driver integrated circuit controls the operation of the external switch so that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven, and the TDDI driver integrated circuit controls the operation of the external switch so that the second external voltage connected to the second terminal of the gate driver integrated circuit is co-driven.

[0011] In one embodiment, the first terminal of the gate driver integrated circuit is coupled to the TDDI driver integrated circuit and receives a first external voltage that drives it in the same way, while the second terminal of the gate driver integrated circuit is connected to a second external voltage but not driven by it. The first external voltage is generated internally by the TDDI driver integrated circuit or generated by the TDDI driver integrated circuit based on an external high voltage.

[0012] In one embodiment, the TDDI driver integrated circuit controls the operation of an external switch such that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven and the second terminal of the gate driver integrated circuit is connected to a second external voltage but not co-driven.

[0013] In one embodiment, the first terminal of the gate driver integrated circuit is coupled to the TDDI driver integrated circuit and receives a first external voltage that drives it in the same way, while the second terminal of the gate driver integrated circuit is connected to a second external voltage but not driven by it. The first external voltage is generated internally by the TDDI driver integrated circuit or generated by the TDDI driver integrated circuit based on an external high voltage.

[0014] In one embodiment, the first terminal of the gate driver integrated circuit is coupled to the TDDI driver integrated circuit and receives a first external voltage that drives it in the same direction. The TDDI driver integrated circuit controls the operation of an external switch so that the second external voltage connected to the second terminal of the gate driver integrated circuit is driven in the same direction. The first external voltage is generated internally by the TDDI driver integrated circuit or generated by the TDDI driver integrated circuit based on an external high voltage.

[0015] In one embodiment, when the first external voltage and the second external voltage coupled to the first and second terminals of the gate driver integrated circuit are both driven by the same voltage, the noise of the touch sampling data of the TDDI driver integrated circuit is reduced.

[0016] In one embodiment, when the terminal voltage of the internal switch of the TDDI driver integrated circuit does not exceed the maximum process voltage limit, the TDDI driver integrated circuit controls the operation of its internal switch SW to make the first external voltage connected to the first terminal of the gate driver integrated circuit co-driven, and the TDDI driver integrated circuit controls the operation of its other internal switch to make the second external voltage connected to the second terminal of the gate driver integrated circuit co-driven.

[0017] In one embodiment, the voltage connected to the TDDI driver integrated circuit is shared with an internal switch, so that the terminal voltage of the internal switch does not exceed the maximum process voltage limit. The TDDI driver integrated circuit controls the operation of the internal switch so that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven, and the TDDI driver integrated circuit controls the operation of another internal switch so that the second external voltage connected to the second terminal of the gate driver integrated circuit is co-driven.

[0018] Compared to existing technologies, the Touch and Display Driver Integration (TDDI) panel driving method of the present invention allows the TDDI driver integrated circuit to effectively avoid the maximum voltage limit of the process by coupling the appropriate voltage through external wiring. This enables the TDDI driver integrated circuit to operate at the maximum withstand voltage of the device during touch, while the gate driver integrated circuit can also obtain sufficient voltage for its operation so that the TDDI panel can operate normally. Attached Figure Description

[0019] Figure 1 This is a flowchart of a Touch and Display Driver Integration (TDDI) panel driving method in a preferred embodiment of the present invention.

[0020] Figures 2 to 12 These are schematic diagrams illustrating different embodiments of the TDDI panel driving method of the present invention applied to TDDI driver integrated circuits and gate driver integrated circuits.

[0021] Figure 13 This is a schematic diagram showing that only the second external voltage VGL is driven.

[0022] Figure 14 This is a schematic diagram showing that the first external voltage VGH_EXT_big and the second external voltage VGL are driven by the same source.

[0023] Figure 15 and Figure 16 These are schematic diagrams of different embodiments that allow the TDDI driver integrated circuit to operate above the maximum process voltage limit without the need for an external switch.

[0024] Figure 17A and Figure 17B This is one embodiment of a level shift driver.

[0025] Figure 18A and Figure 18B This is another embodiment of a level offset driver.

[0026] Explanation of key component symbols:

[0027] Steps S10, S12...

[0028] TDIC…Touch and Display Driver Integration (TDDI) driver integrated circuit

[0029] GDIC… Gate Driver Integrated Circuit

[0030] TDDI…TDDI drive unit

[0031] PUMP…

[0032] T1…First End

[0033] T2…Second End

[0034] C1…capacitor

[0035] C2…capacitor

[0036] SWH…Internal switch

[0037] SWL…Internal switch

[0038] VGH…VGH PUMP power output

[0039] VGL…VGL PUMP power output

[0040] GND…Ground terminal

[0041] VGH_EXT…External voltage

[0042] VGL_EXT…External voltage

[0043] VGH_EXT_Big…external voltage

[0044] VGL_EXT_Big…external voltage

[0045] VGH_CAP_REF…VGH PUMP pin

[0046] VGL_CAP_REF…VGL PUMP pin

[0047] CTRL1…Touch control signal

[0048] CTRL2…Touch control signal

[0049] SW1…External switch

[0050] SW2…External switch

[0051] Offset1…

[0052] VPP…Voltage range of co-drive signal

[0053] PSUB… substrate voltage

[0054] VDPA…Positive power supply operating voltage

[0055] VDNA…Negative power supply operating voltage

[0056] SW3…Internal switch

[0057] SW4…Internal switch

[0058] CON1…Control Unit

[0059] CON2…Control Unit

[0060] MP…P-type transistor

[0061] MP1…P-type transistor

[0062] MP2…P-type transistor

[0063] MN2…N-type transistor

[0064] VDD…Operating voltage

[0065] VSS…Power supply voltage

[0066] VGL_GD…external voltage

[0067] LS… Level Offset Driver

[0068] OFF…

[0069] ON… (Activate) Detailed Implementation

[0070] A preferred embodiment of the present invention is a touch and display driver integrated (TDDI) panel driving method. In this embodiment, the TDDI panel driving method is applied to a TDDI driver integrated circuit and a gate driver integrated circuit. Through circuit design, the TDDI driver integrated circuit can operate at a voltage higher than the maximum process voltage, and the gate driver integrated circuit can also obtain a voltage higher than the maximum process voltage to operate smoothly, but this is not a limitation.

[0071] Figure 1 A flowchart of the TDDI panel driving method in this embodiment is provided. Figure 1 As shown, the TDDI panel driving method in this embodiment includes the following steps:

[0072] Step S10: The TDDI driver integrated circuit is coupled to an appropriate voltage through external wiring, causing the TDDI driver integrated circuit to avoid the maximum voltage limit of the process; and

[0073] Step S12: Generate the voltage required for the operation of the gate driver integrated circuit between the first and second terminals of the gate driver integrated circuit.

[0074] In practical applications, the appropriate voltage coupled to the TDDI driver integrated circuit via external wiring can be, for example, 5V up to the maximum voltage of the TDDI driver integrated circuit, but is not limited to this; the first terminal (high voltage terminal) of the gate driver integrated circuit can be coupled to a larger external voltage (e.g., Figure 2 The first external voltage VGH_EXT_big) and the second terminal (low voltage terminal) of the gate driver integrated circuit can receive the same external voltage generated by the TDDI driver integrated circuit (e.g., the same external voltage VGH_EXT_big). Figure 2 The second external voltage (VGL) is used to enable co-drive operation during touch without affecting the normal operation of the TDDI panel, but this is not a limitation.

[0075] Next, the TDDI panel driving method of the present invention will be described in different ways when applied to TDDI driver integrated circuits and gate driver integrated circuits through the following various embodiments.

[0076] Figure 2 and Figure 3 These are schematic diagrams illustrating different embodiments of the TDDI panel driving method of the present invention applied to a TDDI driver integrated circuit (TDIC) and a gate driver integrated circuit (GDIC). Figure 2 and Figure 3 As shown, the first terminal (high voltage terminal) T1 of the gate driver integrated circuit GDIC is connected to a large first external voltage VGH_EXT_big, but is not a driver, and the second terminal (low voltage terminal) T2 of the gate driver integrated circuit GDIC is coupled to the TDDI driver integrated circuit TDIC and receives the second external voltage VGL, but this is not a limitation.

[0077] It should be noted that, Figure 2 and Figure 3 The difference is: Figure 2 The second external voltage VGL in the co-drive is generated by the pump inside the TDDI driver integrated circuit TDIC, and Figure 3The second external voltage VGL for co-drive is generated by the TDDI driver integrated circuit TDIC based on the external low voltage VGL_EXT to enable co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited thereto.

[0078] like Figure 4 and Figure 5 As shown, the TDDI driver integrated circuit TDIC controls the operation of the external switch SW1 through the touch control signal CTRL1, so that the first external voltage VGH_EXT_big connected to the first terminal T1 of the gate driver integrated circuit GDIC is co-driven, and the second terminal T2 of the gate driver integrated circuit GDIC is coupled to the TDDI driver integrated circuit TDIC and receives the second external voltage VGL co-driven.

[0079] It should be noted that, Figure 4 and Figure 5 The difference is: Figure 4 The second external voltage VGL in the co-drive is generated by the pump inside the TDDI driver integrated circuit TDIC, and Figure 5 The second external voltage VGL for co-drive is generated by the TDDI driver integrated circuit TDIC based on the external low voltage VGL_EXT to enable co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited thereto.

[0080] like Figure 6 As shown, the first terminal T1 of the gate driver integrated circuit GDIC is connected to a larger first external voltage VGH_EXT_big, but not the same as the driver. The TDDI driver integrated circuit TDIC controls the operation of the external switch SW2 through the touch control signal CTRL2 to make the larger second external voltage VGL_EXT_big connected to the second terminal T2 of the gate driver integrated circuit GDIC the same as the driver, but this is not a limitation.

[0081] like Figure 7 As shown, the TDDI driver integrated circuit TDIC controls the operation of the external switch SW1 through the touch control signal CTRL1, so that the larger first external voltage VGH_EXT_big connected to the first terminal T1 of the gate driver integrated circuit GDIC is co-driven, and the TDDI driver integrated circuit TDIC controls the operation of the external switch SW2 through the touch control signal CTRL2, so that the larger second external voltage VGL_EXT_big connected to the second terminal T2 of the gate driver integrated circuit GDIC is co-driven, but not limited to this.

[0082] like Figure 8 and Figure 9As shown, the first terminal T1 of the gate driver integrated circuit GDIC is coupled to the TDDI driver integrated circuit TDIC and receives the first external voltage VGH that drives it. The second terminal T2 of the gate driver integrated circuit GDIC is connected to a larger second external voltage VGL_EXT_big, but they do not drive it.

[0083] It should be noted that, Figure 8 and Figure 9 The difference is: Figure 8 The first external voltage VGH of the co-drive is generated by the pump inside the TDDI driver integrated circuit TDIC, and Figure 9 The first external voltage VGH for co-drive is generated by the TDDI driver integrated circuit TDIC based on the external high voltage VGH_EXT to enable co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited thereto.

[0084] like Figure 10 As shown, the TDDI driver integrated circuit TDIC controls the operation of the external switch SW1 through the touch control signal CTRL1, so that the larger first external voltage VGH_EXT_big connected to the first terminal T1 of the gate driver integrated circuit GDIC is the same as the driver, and the larger second external voltage VGL_EXT_big connected to the second terminal T2 of the gate driver integrated circuit GDIC is not the same as the driver, but this is not a limitation.

[0085] like Figure 11 and Figure 12 As shown, the first terminal T1 of the gate driver integrated circuit GDIC is coupled to the TDDI driver integrated circuit TDIC and receives the first external voltage VGH that drives it. The TDDI driver integrated circuit TDIC controls the operation of the external switch SW2 through the touch control signal CTRL2, so that the larger second external voltage VGL_EXT_big connected to the second terminal T2 of the gate driver integrated circuit GDIC is driven by it.

[0086] It should be noted that, Figure 11 and Figure 12 The difference is: Figure 11 The first external voltage VGH of the co-drive is generated by the pump inside the TDDI driver integrated circuit TDIC, and Figure 12 The first external voltage VGH of the co-drive is generated by the TDDI driver integrated circuit TDIC based on the external voltage VGH_EXT, but is not limited to this.

[0087] like Figure 13As shown, when only the second external voltage VGL is co-driven by the first external voltage VGL_EXT_big and the second external voltage VGL, which are respectively coupled to the first terminal T1 and the second terminal T2 of the gate driver integrated circuit GDIC, the touch sampling data of the TDDI driver integrated circuit TDIC will have greater noise, but this is not a limitation. Furthermore, the voltage difference between the substrate voltage PSUB and the VGL PUMP power output VGL will be less than or equal to the negative power supply operating voltage VDNA, i.e., PSUB-VGL≤VDNA, but this is not a limitation.

[0088] Compared to Figure 13 ,like Figure 14 As shown, when the first external voltage VGL_EXT_big and the second external voltage VGL, which are respectively coupled to the first terminal T1 and the second terminal T2 of the gate driver integrated circuit GDIC, are both driven by the same voltage, the noise of the touch sampling data of the TDDI driver integrated circuit TDIC will be reduced, but this is not the limitation.

[0089] like Figure 15 As shown, since the output voltage of the TDDI driver integrated circuit TDIC will not cause the terminal voltages of its internal switches SW3 and SW4 to exceed the maximum process voltage, when the terminal voltages of the internal switches SW3 and SW4 of the TDDI driver integrated circuit TDIC do not exceed the maximum process voltage limit, the TDDI driver integrated circuit TDIC sends a control signal CTRL1 through the control unit CON1 to control the operation of its internal switch SW3 so that the first external voltage VGH_EXT_OUT connected to the first terminal T1 of the gate driver integrated circuit GDIC is co-driven, and the TDDI driver integrated circuit TDIC sends a control signal CTRL2 through the control unit CON2 to control the operation of its other internal switch SW4 so that the second external voltage VGL_EXT_OUT connected to the second terminal T2 of the gate driver integrated circuit GDIC is co-driven, but this is not a limitation.

[0090] like Figure 16As shown, since the output voltage of the TDDI driver integrated circuit TDIC will not cause the terminal voltages of its internal switches SWH and SWL to exceed the maximum process voltage, and the external voltages VGH_EXT and VGH of the TDDI driver integrated circuit TDIC share the internal switch SWH, when the terminal voltages of the internal switches SWH and SWL of the TDDI driver integrated circuit TDIC do not exceed the maximum process voltage limit, the TDDI driver integrated circuit TDIC sends a control signal CTRL1 through the control unit CON1 to control the operation of the internal switch SWH so that the first external voltage VGH_EXT_OUT connected to the first terminal T1 of the gate driver integrated circuit GDIC is co-driven, and the TDDI driver integrated circuit TDIC sends a control signal CTRL2 through the control unit CON2 to control the operation of another internal switch SWL so that the second external voltage VGL_EXT_OUT connected to the second terminal T2 of the gate driver integrated circuit GDIC is co-driven, but this is not a limitation.

[0091] Figure 17A and Figure 17B This is an embodiment of a level offset driver LS. For example... Figure 17A and Figure 17B As shown, if the level offset driver LS, coupled to a first external voltage VGH, provides an operating voltage range of 32V; coupled to a positive power supply operating voltage VDPA, it provides an operating voltage range of 32V; and coupled to a second external voltage VGL, it provides an operating voltage range of -16V, then... Figure 17B The level offset driver LS, which is coupled between the positive power supply operating voltage VDPA and the second external voltage VGL, should be able to provide an operating voltage range of 48V. Therefore, the maximum operating voltage that the pump inside the TDDI driver integrated circuit TDIC can provide is VGH-VGL=32V-(-16V)=48V, which is greater than the maximum operating voltage of 40V of the gate driver integrated circuit GDIC. Thus, the gate driver integrated circuit GDIC can also obtain sufficient operating voltage to allow the TDDI panel to operate normally, but this is not the limitation.

[0092] Figure 18A and Figure 18B This is an example of a level offset driver LS coupled to a second external voltage VGL. For example... Figure 18A and Figure 18BAs shown, if the level offset driver LS is coupled to the second external voltage VGL, it can provide an operating voltage range of (-16V), and coupled to the first external voltage VGH, it can provide an operating voltage range of 32V. Therefore, the maximum operating voltage that the pump inside the TDDI driver integrated circuit TDIC can provide is VGH-VGL=32V-(-16V)=48V, which is greater than the maximum operating voltage of the gate driver integrated circuit GDIC of 40V. Therefore, the gate driver integrated circuit GDIC can also obtain sufficient operating voltage to allow the TDDI panel to operate normally, but this is not the limitation.

[0093] Compared to existing technologies, the Touch and Display Driver Integration (TDDI) panel driving method of the present invention allows the TDDI driver integrated circuit to be coupled to an appropriate voltage through external wiring, so that the TDDI driver integrated circuit can operate at the maximum withstand voltage of the device during touch, effectively avoiding the maximum voltage limit of the process. At the same time, the gate driver integrated circuit can also obtain sufficient voltage for its operation, so that the TDDI panel can operate normally.

Claims

1. A method for driving a touch and display driver integrated panel, applied to a touch and display driver integrated driver integrated circuit and a gate driver integrated circuit, wherein a first terminal of the gate driver integrated circuit is externally connected to a first external voltage, and a second terminal of the gate driver integrated circuit is coupled to the touch and display driver integrated driver integrated circuit; or, a first terminal of the gate driver integrated circuit is coupled to the touch and display driver integrated driver integrated circuit, and a second terminal of the gate driver integrated circuit is externally connected to a second external voltage, characterized in that... Includes the following steps: (a) The touch and display driver integrated circuit is coupled to a voltage of 5V to the maximum voltage of the touch and display driver integrated circuit via an external wiring connection, so that the terminal voltage of the internal switch of the touch and display driver integrated circuit does not exceed the maximum process voltage limit; as well as (b) To provide the voltage required for the operation of the gate driver integrated circuit between the first and second terminals of the gate driver integrated circuit.

2. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The first terminal of the gate driver integrated circuit is connected to a first external voltage but not driven by it, and the second terminal of the gate driver integrated circuit is coupled to the touch and display driver integrated circuit and receives a second external voltage driven by it. The second external voltage is generated internally by the touch and display driver integrated circuit or generated by the touch and display driver integrated circuit according to the external low voltage.

3. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The touch and display driver integrated circuit controls the operation of the external switch so that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven, and the second terminal of the gate driver integrated circuit is coupled to the touch and display driver integrated circuit and receives the co-driven second external voltage. The second external voltage is generated internally by the touch and display driver integrated circuit or generated by the touch and display driver integrated circuit according to the external low voltage.

4. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The first terminal of the gate driver integrated circuit is connected to a first external voltage but is not driven by it, and the touch and display driver integrated circuit controls the operation of the external switch so that the second terminal of the gate driver integrated circuit is connected to a second external voltage that is driven by it.

5. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The integrated touch and display driver control circuit controls the operation of external switches so that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven, and the integrated touch and display driver control circuit controls the operation of external switches so that the second external voltage connected to the second terminal of the gate driver integrated circuit is co-driven.

6. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The first terminal of the gate driver integrated circuit is coupled to the touch and display driver integrated circuit and receives a first external voltage driven by the same circuit. The second terminal of the gate driver integrated circuit is connected to a second external voltage but is not driven by the same circuit. The first external voltage is generated internally by the touch and display driver integrated circuit or generated by the touch and display driver integrated circuit according to an external high voltage.

7. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The integrated touch and display driver controls the operation of the external switch so that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven and the second external voltage connected to the second terminal of the gate driver integrated circuit is not co-driven.

8. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The first terminal of the gate driver integrated circuit is coupled to the touch and display driver integrated circuit and receives the first external voltage driven by the same circuit. The touch and display driver integrated circuit controls the operation of the external switch so that the second external voltage connected to the second terminal of the gate driver integrated circuit is driven by the same circuit. The first external voltage is generated internally by the touch and display driver integrated circuit or generated by the touch and display driver integrated circuit according to the external high voltage.

9. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, When the first external voltage and the second external voltage coupled to the first terminal and the second terminal of the gate driver integrated circuit are both driven by the same voltage, the noise of the touch sampling data of the touch and display driver integrated circuit is reduced.

10. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, When the voltage at the terminal of the internal switch of the integrated touch and display driver does not exceed the maximum voltage limit of the process, the integrated touch and display driver controls the operation of the internal switch to make the first external voltage connected to the first terminal of the gate driver integrated circuit co-driven, and the integrated touch and display driver controls the operation of its other internal switch to make the second external voltage connected to the second terminal of the gate driver integrated circuit co-driven.

11. The integrated touch and display driver panel driving method as described in claim 1, characterized in that, The voltage connected to the external integrated circuit of the touch and display driver is shared with the internal switch, so that the voltage at the terminal of the internal switch does not exceed the maximum voltage limit of the process. The integrated integrated circuit of the touch and display driver controls the operation of the internal switch so that the first external voltage connected to the first terminal of the gate driver integrated circuit is co-driven, and the integrated integrated circuit of the touch and display driver controls the operation of another internal switch so that the second external voltage connected to the second terminal of the gate driver integrated circuit is co-driven.

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