TWI828315B - Touch and display driver integration (tddi) panel driving method - Google Patents

Touch and display driver integration (tddi) panel driving method Download PDF

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TWI828315B
TWI828315B TW111134770A TW111134770A TWI828315B TW I828315 B TWI828315 B TW I828315B TW 111134770 A TW111134770 A TW 111134770A TW 111134770 A TW111134770 A TW 111134770A TW I828315 B TWI828315 B TW I828315B
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integrated circuit
tddi
driving integrated
voltage
external
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TW202411738A (en
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郭博學
陳建儒
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瑞鼎科技股份有限公司
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Abstract

The invention discloses a touch and display driver integrated (TDDI) panel driving method comprising the following steps of: (a) coupling a TDDI driver IC to an appropriate voltage through an external wire, so that the TDDI driver IC avoids a maximum process voltage limit; and (b) generating a voltage required for operating a gate driver IC between a first terminal and a second terminal of the gate driver IC.

Description

觸控與顯示驅動器整合面板驅動方法Touch and display driver integrated panel driving method

本發明係與面板驅動有關，特別是關於一種觸控與顯示驅動器整合(TDDI)面板驅動方法。The present invention relates to panel driving, and in particular to a touch and display driver integration (TDDI) panel driving method.

一般而言，當TDDI驅動積體電路對面板運作時，由於觸控產生的觸控訊號會增加電壓，相對會降低製程最大電壓的可運作電壓範圍，因而導致TDDI驅動積體電路在觸控期間進行同驅運作時無法完全運作在元件最大耐壓。Generally speaking, when the TDDI driving integrated circuit operates on the panel, the touch signal generated by the touch will increase the voltage, which will relatively reduce the operating voltage range of the maximum voltage of the process, thus causing the TDDI driving integrated circuit to operate during the touch operation. When performing co-drive operation, the device cannot fully operate at the maximum withstand voltage of the device.

舉例來說，若TDDI驅動積體電路的MOS電晶體元件的最大耐壓為32V，當TDDI驅動積體電路在觸控期間即無法以最大耐壓32V進行同驅運作時，而僅能以比最大耐壓32V低4V至5V的製程最大電壓27V至28V進行同驅運作。For example, if the maximum withstand voltage of the MOS transistor element of the TDDI driving integrated circuit is 32V, when the TDDI driving integrated circuit cannot perform co-drive operation with the maximum withstand voltage of 32V during touch, it can only operate with a ratio of The maximum withstand voltage is 32V and the process with a low voltage of 4V to 5V has a maximum voltage of 27V to 28V for co-drive operation.

然而，若閘極驅動積體電路的運作電壓(例如32V或以上)超過製程最大電壓(例如27V至28V)，則此時TDDI驅動積體電路就無法使用。此一問題亟待進一步加以解決。However, if the operating voltage of the gate driving integrated circuit (for example, 32V or above) exceeds the maximum process voltage (for example, 27V to 28V), the TDDI driving integrated circuit cannot be used at this time. This issue urgently needs to be further resolved.

因此，本發明提出一種觸控與顯示驅動器整合面板驅動方法，藉以有效解決先前技術所遭遇到之上述問題。Therefore, the present invention proposes a touch and display driver integrated panel driving method to effectively solve the above-mentioned problems encountered in the prior art.

根據本發明之一較佳具體實施例為一種觸控與顯示驅動器整合(TDDI)面板驅動方法，包括下列步驟：(a)TDDI驅動積體電路透過外部接線耦接適當電壓，致使TDDI驅動積體電路避開製程最大電壓限制；以及(b)使閘極驅動積體電路的第一端與第二端之間產生閘極驅動積體電路運作所需電壓。A preferred embodiment according to the present invention is a touch and display driver integrated (TDDI) panel driving method, which includes the following steps: (a) The TDDI driving integrated circuit is coupled to an appropriate voltage through external wiring, so that the TDDI driving integrated circuit The circuit avoids the maximum voltage limit of the process; and (b) generates a voltage required for the operation of the gate driving integrated circuit between the first end and the second end of the gate driving integrated circuit.

於一實施例中，閘極驅動積體電路的第一端外接第一外部電壓但不同驅且閘極驅動積體電路的第二端耦接TDDI驅動積體電路並接收同驅的第二外部電壓，第二外部電壓係由TDDI驅動積體電路內部產生或由TDDI驅動積體電路根據外部低電壓產生。In one embodiment, the first end of the gate driving integrated circuit is externally connected to a first external voltage but is not driven, and the second end of the gate driving integrated circuit is coupled to the TDDI driving integrated circuit and receives a second external voltage with the same drive. voltage, the second external voltage is generated internally by the TDDI driving integrated circuit or generated by the TDDI driving integrated circuit according to an external low voltage.

於一實施例中，TDDI驅動積體電路控制外部開關的運作使閘極驅動積體電路的第一端外接的第一外部電壓為同驅且閘極驅動積體電路的第二端耦接TDDI驅動積體電路並接收同驅的第二外部電壓，第二外部電壓係由TDDI驅動積體電路內部產生或由TDDI驅動積體電路根據外部低電壓產生。In one embodiment, the TDDI driving integrated circuit controls the operation of the external switch so that the first external voltage connected to the first end of the gate driving integrated circuit is co-driven and the second end of the gate driving integrated circuit is coupled to the TDDI The driving integrated circuit receives a co-driven second external voltage. The second external voltage is generated internally by the TDDI driving integrated circuit or is generated by the TDDI driving integrated circuit according to an external low voltage.

於一實施例中，閘極驅動積體電路的第一端外接第一外部電壓但不同驅且TDDI驅動積體電路控制外部開關SW的運作使閘極驅動積體電路的第二端外接的第二外部電壓為同驅。In one embodiment, the first terminal of the gate driving integrated circuit is externally connected to the first external voltage but is not driven, and the TDDI driving integrated circuit controls the operation of the external switch SW so that the second terminal of the gate driving integrated circuit is externally connected to the third external voltage. Two external voltages are co-driven.

於一實施例中，TDDI驅動積體電路控制外部開關的運作使閘極驅動積體電路的第一端外接的第一外部電壓為同驅且TDDI驅動積體電路控制外部開關的運作使閘極驅動積體電路的第二端外接的第二外部電壓為同驅。In one embodiment, the TDDI driving integrated circuit controls the operation of the external switch so that the first external voltage externally connected to the first end of the gate driving integrated circuit is co-driven and the TDDI driving integrated circuit controls the operation of the external switch such that the gate The second external voltage connected to the second terminal of the driving integrated circuit is co-driven.

於一實施例中，閘極驅動積體電路的第一端耦接TDDI驅動積體電路並接收同驅的第一外部電壓且閘極驅動積體電路的第二端外接第二外部電壓但不同驅，第一外部電壓係由TDDI驅動積體電路內部產生或由TDDI驅動積體電路根據外部高電壓產生。In one embodiment, the first terminal of the gate driving integrated circuit is coupled to the TDDI driving integrated circuit and receives a first external voltage of the same driver, and the second terminal of the gate driving integrated circuit is externally connected to a second external voltage but different Drive, the first external voltage is generated internally by the TDDI driving integrated circuit or generated by the TDDI driving integrated circuit according to an external high voltage.

於一實施例中，閘極驅動積體電路的第一端耦接TDDI驅動積體電路並接收同驅的第一外部電壓且閘極驅動積體電路的第二端外接第二外部電壓但不同驅，第一外部電壓係由TDDI驅動積體電路內部產生或由TDDI驅動積體電路根據外部高電壓產生。In one embodiment, the first terminal of the gate driving integrated circuit is coupled to the TDDI driving integrated circuit and receives a first external voltage of the same driver, and the second terminal of the gate driving integrated circuit is externally connected to a second external voltage but different Drive, the first external voltage is generated internally by the TDDI driving integrated circuit or generated by the TDDI driving integrated circuit according to an external high voltage.

於一實施例中，閘極驅動積體電路的第一端耦接TDDI驅動積體電路並接收同驅的第一外部電壓且TDDI驅動積體電路控制外部開關的運作使閘極驅動積體電路的第二端外接的第二外部電壓為同驅，第一外部電壓係由TDDI驅動積體電路內部產生或由TDDI驅動積體電路根據外部高電壓產生。In one embodiment, the first terminal of the gate driving integrated circuit is coupled to the TDDI driving integrated circuit and receives the first external voltage of the co-driver, and the TDDI driving integrated circuit controls the operation of the external switch so that the gate driving integrated circuit The second external voltage connected to the second terminal is co-driven, and the first external voltage is generated internally by the TDDI driving integrated circuit or generated by the TDDI driving integrated circuit according to an external high voltage.

於一實施例中，當閘極驅動積體電路的第一端與第二端分別耦接的第一外部電壓及第二外部電壓均為同驅時，則TDDI驅動積體電路進行觸控取樣的資料的雜訊變小。In one embodiment, when the first external voltage and the second external voltage respectively coupled to the first end and the second end of the gate driving integrated circuit are both co-driven, the TDDI driving integrated circuit performs touch sampling. The noise of the data becomes smaller.

於一實施例中，當TDDI驅動積體電路的內部開關的端電壓不超出製程最大電壓限制時，TDDI驅動積體電路控制其內部開關SW的運作使閘極驅動積體電路的第一端外接的第一外部電壓為同驅且TDDI驅動積體電路控制其另一內部開關的運作使閘極驅動積體電路的第二端外接的第二外部電壓為同驅。In one embodiment, when the terminal voltage of the internal switch of the TDDI driving integrated circuit does not exceed the maximum voltage limit of the process, the TDDI driving integrated circuit controls the operation of its internal switch SW so that the first terminal of the gate driving integrated circuit is externally connected. The first external voltage is co-driver and the TDDI drive integrated circuit controls the operation of its other internal switch so that the second external voltage connected to the second end of the gate drive integrated circuit is co-driver.

於一實施例中，TDDI驅動積體電路外接的電壓共用內部開關，使內部開關的端電壓不超出製程最大電壓限制，TDDI驅動積體電路控制內部開關的運作使閘極驅動積體電路的第一端外接的第一外部電壓為同驅且該TDDI驅動積體電路控制另一內部開關的運作使閘極驅動積體電路的第二端外接的第二外部電壓為同驅。In one embodiment, the external voltage of the TDDI driving integrated circuit shares the internal switch so that the terminal voltage of the internal switch does not exceed the maximum voltage limit of the process. The TDDI driving integrated circuit controls the operation of the internal switch so that the gate drives the third gate of the integrated circuit. The first external voltage connected to one end is co-driver and the TDDI drive integrated circuit controls the operation of another internal switch so that the second external voltage connected to the second end of the gate drive integrated circuit is co-driver.

相較於先前技術，本發明之觸控與顯示驅動器整合(TDDI)面板驅動方法讓TDDI驅動積體電路透過外部接線耦接適當電壓來有效避開製程最大電壓限制，使得TDDI驅動積體電路在觸控期間能以元件最大耐壓進行同驅運作，同時閘極驅動積體電路亦可獲得其運作所需的足夠電壓而讓TDDI面板能夠正常運作。Compared with the prior art, the touch and display driver integrated (TDDI) panel driving method of the present invention allows the TDDI driving integrated circuit to be coupled to an appropriate voltage through external wiring to effectively avoid the maximum voltage limit of the process, so that the TDDI driving integrated circuit can During touch, co-drive operation can be performed at the maximum withstand voltage of the component. At the same time, the gate drive integrated circuit can also obtain sufficient voltage required for its operation, allowing the TDDI panel to operate normally.

根據本發明之一較佳具體實施例為一種觸控與顯示驅動器整合(TDDI)面板驅動方法。於此實施例中，TDDI面板驅動方法係應用於TDDI驅動積體電路與閘極驅動積體電路，透過電路設計讓TDDI驅動積體電路能夠運作於製程最大電壓以上，閘極驅動積體電路亦可獲得大於最大製程電壓以上的電壓以順利運作，但不以此為限。A preferred embodiment according to the present invention is a touch and display driver integration (TDDI) panel driving method. In this embodiment, the TDDI panel driving method is applied to the TDDI driving integrated circuit and the gate driving integrated circuit. Through circuit design, the TDDI driving integrated circuit can operate above the maximum voltage of the process, and the gate driving integrated circuit also A voltage greater than the maximum process voltage can be obtained to operate smoothly, but is not limited to this.

請參照圖1，圖1繪示此實施例中之TDDI面板驅動方法之流程圖。如圖1所示，此實施例中之TDDI面板驅動方法包括下列步驟：Please refer to FIG. 1 , which illustrates a flow chart of the TDDI panel driving method in this embodiment. As shown in Figure 1, the TDDI panel driving method in this embodiment includes the following steps:

步驟S10：TDDI驅動積體電路透過外部接線耦接適當電壓，致使TDDI驅動積體電路避開製程最大電壓限制；以及Step S10: The TDDI driving integrated circuit is coupled to the appropriate voltage through external wiring, so that the TDDI driving integrated circuit avoids the maximum voltage limit of the process; and

步驟S12：使閘極驅動積體電路的第一端與第二端之間產生閘極驅動積體電路運作所需電壓。Step S12: Generate a voltage required for the operation of the gate driving integrated circuit between the first end and the second end of the gate driving integrated circuit.

於實際應用中，TDDI驅動積體電路透過外部接線所耦接的適當電壓可以是例如5V至TDDI驅動積體電路的最大電壓，但不以此為限；閘極驅動積體電路的第一端(高壓端)可耦接較大的外部電壓(例如圖2中之第一外部電壓VGH_EXT_big)且閘極驅動積體電路的第二端(低壓端)可接收TDDI驅動積體電路產生的同驅的外部電壓(例如圖2中之第二外部電壓VGL)，藉以在觸控期間進行同驅運作而不會影響TDDI面板的正常運作，但不以此為限。In practical applications, the appropriate voltage coupled to the TDDI driving integrated circuit through external wiring can be, for example, 5V to the maximum voltage of the TDDI driving integrated circuit, but is not limited to this; the first terminal of the gate driving integrated circuit The (high-voltage end) can be coupled to a larger external voltage (such as the first external voltage VGH_EXT_big in Figure 2) and the second end (low-voltage end) of the gate driving integrated circuit can receive the co-drive generated by the TDDI driving integrated circuit. An external voltage (such as the second external voltage VGL in Figure 2) is used to perform co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited to this.

接下來，將分別透過下列各種不同的實施例來說明本發明之TDDI面板驅動方法應用於TDDI驅動積體電路與閘極驅動積體電路之不同情況。Next, different situations in which the TDDI panel driving method of the present invention is applied to TDDI driving integrated circuits and gate driving integrated circuits will be described through the following various embodiments.

請參照圖2及圖3，圖2及圖3分別繪示本發明之TDDI面板驅動方法應用於TDDI驅動積體電路TDIC與閘極驅動積體電路GDIC之不同實施例之示意圖。如圖2及圖3所示，閘極驅動積體電路GDIC的第一端(高壓端)T1外接較大的第一外部電壓VGH_EXT_big但不同驅且閘極驅動積體電路GDIC的第二端(低壓端)T2耦接TDDI驅動積體電路TDIC並接收同驅的第二外部電壓VGL，但不以此為限。Please refer to FIGS. 2 and 3 , which respectively illustrate different embodiments of the TDDI panel driving method of the present invention applied to a TDDI driving integrated circuit TDIC and a gate driving integrated circuit GDIC. As shown in Figure 2 and Figure 3, the first terminal (high voltage terminal) T1 of the gate driving integrated circuit GDIC is externally connected to a larger first external voltage VGH_EXT_big but is not driven and the second terminal (high voltage terminal) of the gate driving integrated circuit GDIC ( The low voltage terminal (T2) is coupled to the TDDI driver integrated circuit TDIC and receives the second external voltage VGL of the co-driver, but is not limited to this.

需說明的是，圖2與圖3不同之處在於：圖2中之同驅的第二外部電壓VGL係由TDDI驅動積體電路TDIC內部的泵PUMP產生，而圖3中之同驅的第二外部電壓VGL係由TDDI驅動積體電路TDIC根據外部低電壓VGL_EXT產生，藉以在觸控期間進行同驅運作而不會影響TDDI面板的正常運作，但不以此為限。It should be noted that the difference between Figure 2 and Figure 3 is that the second external voltage VGL of the co-driver in Figure 2 is generated by the pump PUMP inside the TDDI driver integrated circuit TDIC, while the second external voltage VGL of the co-driver in Figure 3 The second external voltage VGL is generated by the TDDI driver integrated circuit TDIC according to the external low voltage VGL_EXT, so as to perform co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited to this.

請參照圖4及圖5，TDDI驅動積體電路TDIC透過觸控控制訊號CTRL1控制外部開關SW1的運作使閘極驅動積體電路GDIC的第一端T1外接的第一外部電壓VGH_EXT_big為同驅且閘極驅動積體電路GDIC的第二端T2耦接TDDI驅動積體電路TDIC並接收同驅的第二外部電壓VGL。Please refer to Figure 4 and Figure 5. The TDDI drive 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 externally connected to the first terminal T1 of the gate drive integrated circuit GDIC is co-driven and The second terminal T2 of the gate driving integrated circuit GDIC is coupled to the TDDI driving integrated circuit TDIC and receives the co-driven second external voltage VGL.

需說明的是，圖4與圖5不同之處在於：圖4中之同驅的第二外部電壓VGL係由TDDI驅動積體電路TDIC內部的泵PUMP產生，而圖5中之同驅的第二外部電壓VGL係由TDDI驅動積體電路TDIC根據外部低電壓VGL_EXT產生，藉以在觸控期間進行同驅運作而不會影響TDDI面板的正常運作，但不以此為限。It should be noted that the difference between Figure 4 and Figure 5 is that the second external voltage VGL of the co-driver in Figure 4 is generated by the pump PUMP inside the TDDI driver integrated circuit TDIC, while the third external voltage VGL of the co-driver in Figure 5 The second external voltage VGL is generated by the TDDI driver integrated circuit TDIC according to the external low voltage VGL_EXT, so as to perform co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited to this.

請參照圖6，閘極驅動積體電路GDIC的第一端T1外接較大的第一外部電壓VGH_EXT_big但不同驅且TDDI驅動積體電路TDIC透過觸控控制訊號CTRL2控制外部開關SW2的運作使閘極驅動積體電路GDIC的第二端T2外接的較大的第二外部電壓VGL_EXT_big為同驅，但不以此為限。Please refer to Figure 6. The first terminal T1 of the gate driving integrated circuit GDIC is externally connected to a larger first external voltage VGH_EXT_big but is not driven and the TDDI driving integrated circuit TDIC controls the operation of the external switch SW2 through the touch control signal CTRL2 to make the gate The larger second external voltage VGL_EXT_big externally connected to the second terminal T2 of the pole driving integrated circuit GDIC is co-driven, but is not limited to this.

請參照圖7，TDDI驅動積體電路TDIC透過觸控控制訊號CTRL1控制外部開關SW1的運作使閘極驅動積體電路GDIC的第一端T1外接的較大的第一外部電壓VGH_EXT_big為同驅且TDDI驅動積體電路TDIC透過觸控控制訊號CTRL2控制外部開關SW2的運作使閘極驅動積體電路GDIC的第二端T2外接的較大的第二外部電壓VGL_EXT_big為同驅，但不以此為限。Please refer to Figure 7. The TDDI drive integrated circuit TDIC controls the operation of the external switch SW1 through the touch control signal CTRL1, so that the first terminal T1 of the gate drive integrated circuit GDIC is connected to the larger first external voltage VGH_EXT_big as co-driver and The TDDI drive 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 externally connected to the second terminal T2 of the gate drive integrated circuit GDIC is co-driven, but it is not used as a co-driver. limit.

請參照圖8及圖9，閘極驅動積體電路GDIC的第一端T1耦接TDDI驅動積體電路TDIC並接收同驅的第一外部電壓VGH且閘極驅動積體電路GDIC的第二端T2外接較大的第二外部電壓VGL_EXT_big但不同驅。Please refer to Figure 8 and Figure 9. The first terminal T1 of the gate driving integrated circuit GDIC is coupled to the TDDI driving integrated circuit TDIC and receives the first external voltage VGH of the co-driver and the second terminal T1 of the gate driving integrated circuit GDIC T2 is externally connected to a larger second external voltage VGL_EXT_big but is not driven.

需說明的是，圖8與圖9不同之處在於：圖8中之同驅的第一外部電壓VGH係由TDDI驅動積體電路TDIC內部的泵PUMP產生，而圖9中之同驅的第一外部電壓VGH係由TDDI驅動積體電路TDIC根據外部高電壓VGH_EXT產生，藉以在觸控期間進行同驅運作而不會影響TDDI面板的正常運作，但不以此為限。It should be noted that the difference between Figure 8 and Figure 9 is that the first external voltage VGH of the co-driver in Figure 8 is generated by the pump PUMP inside the TDDI driver integrated circuit TDIC, while the first external voltage VGH of the co-driver in Figure 9 An external voltage VGH is generated by the TDDI driver integrated circuit TDIC according to the external high voltage VGH_EXT, so as to perform co-drive operation during touch without affecting the normal operation of the TDDI panel, but is not limited to this.

請參照圖10，TDDI驅動積體電路TDIC透過觸控控制訊號CTRL1控制外部開關SW1的運作使閘極驅動積體電路GDIC的第一端T1外接的較大的第一外部電壓VGH_EXT_big為同驅且閘極驅動積體電路GDIC的第二端T2外接較大的第二外部電壓VGL_EXT_big但不同驅，但不以此為限。Please refer to Figure 10. The TDDI driving 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 externally connected to the first terminal T1 of the gate driving integrated circuit GDIC is co-driven and The second terminal T2 of the gate driving integrated circuit GDIC is externally connected to a larger second external voltage VGL_EXT_big but is not driven, but is not limited to this.

請參照圖11及圖12，閘極驅動積體電路GDIC的第一端T1耦接TDDI驅動積體電路TDIC並接收同驅的第一外部電壓VGH且TDDI驅動積體電路TDIC透過觸控控制訊號CTRL2控制外部開關SW2的運作使閘極驅動積體電路GDIC的第二端T2外接的較大的第二外部電壓VGL_EXT_big為同驅。Please refer to Figure 11 and Figure 12. The first terminal T1 of the gate driving integrated circuit GDIC is coupled to the TDDI driving integrated circuit TDIC and receives the first external voltage VGH of the co-driver, and the TDDI driving integrated circuit TDIC controls the touch signal through CTRL2 controls the operation of the external switch SW2 so that the larger second external voltage VGL_EXT_big externally connected to the second terminal T2 of the gate driving integrated circuit GDIC is co-driven.

需說明的是，圖11與圖12不同之處在於：圖11中之同驅的第一外部電壓VGH係由TDDI驅動積體電路TDIC內部的泵PUMP產生，而圖12中之同驅的第一外部電壓VGH係由TDDI驅動積體電路TDIC根據外部電壓VGH_EXT產生，但不以此為限。It should be noted that the difference between Figure 11 and Figure 12 is that the first external voltage VGH of the co-driver in Figure 11 is generated by the pump PUMP inside the TDDI driving integrated circuit TDIC, while the first external voltage VGH of the co-driver in Figure 12 An external voltage VGH is generated by the TDDI driving integrated circuit TDIC according to the external voltage VGH_EXT, but is not limited to this.

請參照圖13，當閘極驅動積體電路GDIC的第一端T1與第二端T2分別耦接的第一外部電壓VGL_EXT_big及第二外部電壓VGL之中僅有第二外部電壓VGL同驅時，會使得TDDI驅動積體電路TDIC進行觸控取樣的資料具有較大的雜訊，但不以此為限。此外，基板電壓PSUB與VGL PUMP電源輸出VGL之間的電壓差會小於或等於負電源工作電壓VDNA，亦即PSUB-VGL≤VDNA，但不以此為限。Please refer to Figure 13. When the first external voltage VGL_EXT_big and the second external voltage VGL respectively coupled to the first terminal T1 and the second terminal T2 of the gate driving integrated circuit GDIC, only the second external voltage VGL is co-driven. , which will cause the touch sampling data of the TDDI driver integrated circuit TDIC to have greater noise, but it is not limited to this. In addition, the voltage difference between the substrate voltage PSUB and the VGL PUMP power supply output VGL will be less than or equal to the negative power supply operating voltage VDNA, that is, PSUB-VGL ≤ VDNA, but it is not limited to this.

相較於圖13，亦請參照圖14，當閘極驅動積體電路GDIC的第一端T1與第二端T2分別耦接的第一外部電壓VGL_EXT_big及第二外部電壓VGL均為同驅時，會使TDDI驅動積體電路TDIC進行觸控取樣的資料的雜訊變小，但不以此為限。Compared with Figure 13, please also refer to Figure 14, when the first external voltage VGL_EXT_big and the second external voltage VGL respectively coupled to the first terminal T1 and the second terminal T2 of the gate driving integrated circuit GDIC are both co-driven. , will make the noise of the data used for touch sampling by the TDDI driving integrated circuit TDIC smaller, but it is not limited to this.

請參照圖15，由於TDDI驅動積體電路TDIC的輸出電壓不會讓其內部開關SW3與SW4的端電壓超過製程最大電壓，因此，當TDDI驅動積體電路TDIC的內部開關SW3與SW4的端電壓不超出製程最大電壓限制時，TDDI驅動積體電路TDIC透過控制單元CON1發出控制訊號CTRL1控制其內部開關SW3的運作使閘極驅動積體電路GDIC的第一端T1外接的第一外部電壓VGH_EXT_OUT為同驅且TDDI驅動積體電路TDIC透過控制單元CON2發出控制訊號CTRL2控制其另一內部開關SW4的運作使閘極驅動積體電路GDIC的第二端T2外接的第二外部電壓VGL_EXT_OUT為同驅，但不以此為限。Please refer to Figure 15. Since the output voltage of the TDDI driving integrated circuit TDIC will not cause the terminal voltages of its internal switches SW3 and SW4 to exceed the maximum process voltage, therefore, when the TDDI drives the terminal voltages of the internal switches SW3 and SW4 of the integrated circuit TDIC, When the maximum voltage limit of the process is not exceeded, the TDDI drive 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 drive integrated circuit GDIC is The co-driven and TDDI driving 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 driving integrated circuit GDIC is co-driven. But it is not limited to this.

請參照圖16，由於TDDI驅動積體電路TDIC的輸出電壓不會讓其內部開關SWH與SWL的端電壓超過製程最大電壓，且TDDI驅動積體電路TDIC外接的電壓VGH_EXT與VGH共用內部開關SWH，因此，當TDDI驅動積體電路TDIC的內部開關SWH與SWL的端電壓不超出製程最大電壓限制時，TDDI驅動積體電路TDIC透過控制單元CON1發出控制訊號CTRL1控制內部開關SWH的運作使閘極驅動積體電路GDIC的第一端T1外接的第一外部電壓VGH_EXT_OUT為同驅且TDDI驅動積體電路TDIC透過控制單元CON2發出控制訊號CTRL2控制另一內部開關SWL的運作使閘極驅動積體電路GDIC的第二端T2外接的第二外部電壓VGL_EXT_OUT為同驅，但不以此為限。Please refer to Figure 16. Since the output voltage of the TDDI driving 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 driving integrated circuit TDIC share the internal switch SWH, Therefore, when the terminal voltages of the internal switches SWH and SWL of the TDDI driving integrated circuit TDIC do not exceed the maximum voltage limit of the process, the TDDI driving integrated circuit TDIC sends a control signal CTRL1 through the control unit CON1 to control the operation of the internal switch SWH to drive the gate. The first external voltage VGH_EXT_OUT connected to the first terminal T1 of the integrated circuit GDIC is co-driven and the TDDI drives the integrated circuit TDIC. It sends a control signal CTRL2 through the control unit CON2 to control the operation of another internal switch SWL, so that the gate drives the integrated circuit GDIC. The second external voltage VGL_EXT_OUT externally connected to the second terminal T2 is co-driven, but is not limited to this.

請參照圖17A及圖17B，圖17A及圖17B繪示位準偏移驅動器LS之一實施例。如圖17A及圖17B所示，若位準偏移驅動器LS耦接第一外部電壓VGH可提供32V的運作電壓範圍、耦接正電源工作電壓VDPA可提供32V的運作電壓範圍、耦接第二外部電壓VGL可提供(-16V)的運作電壓範圍，則圖17B中之耦接於正電源工作電壓VDPA與第二外部電壓VGL之間的位準偏移驅動器LS應可提供48V的運作電壓範圍，因此TDDI驅動積體電路TDIC內部的泵PUMP可提供的最大運作電壓為VGH-VGL=32V-(-16V)=48V，已大於閘極驅動積體電路GDIC的最大運作電壓40V，故閘極驅動積體電路GDIC亦可獲得足夠的運作電壓而讓TDDI面板能夠正常運作，但不以此為限。Please refer to FIGS. 17A and 17B , which illustrate an embodiment of the level shift driver LS. As shown in Figure 17A and Figure 17B, if the level offset driver LS is coupled to the first external voltage VGH, it can provide an operating voltage range of 32V, coupled to the positive power supply operating voltage VDPA, it can provide an operating voltage range of 32V, and coupled to the second external voltage VGH, it can provide an operating voltage range of 32V. The external voltage VGL can provide an operating voltage range of (-16V), so the level offset driver LS in Figure 17B 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. , so the maximum operating voltage that the pump PUMP inside the TDDI drive integrated circuit TDIC can provide is VGH-VGL=32V-(-16V)=48V, which is greater than the maximum operating voltage of the gate drive integrated circuit GDIC 40V, so the gate Driving the integrated circuit GDIC can also obtain sufficient operating voltage to allow the TDDI panel to operate normally, but it is not limited to this.

請參照圖18A及圖18B，圖18A及圖18B繪示耦接第二外部電壓VGL的位準偏移驅動器LS之實施例。如圖18A及圖18B所示，若位準偏移驅動器LS耦接第二外部電壓VGL可提供(-16V)的運作電壓範圍、耦接第一外部電壓VGH可提供32V的運作電壓範圍，因此TDDI驅動積體電路TDIC內部的泵PUMP可提供的最大運作電壓為VGH-VGL=32V-(-16V)=48V，已大於閘極驅動積體電路GDIC的最大運作電壓40V，故閘極驅動積體電路GDIC亦可獲得足夠的運作電壓而讓TDDI面板能夠正常運作，但不以此為限。Please refer to FIGS. 18A and 18B , which illustrate an embodiment of the level shift driver LS coupled to the second external voltage VGL. As shown in Figure 18A and Figure 18B, if the level shift driver LS is coupled to the second external voltage VGL, it can provide an operating voltage range of (-16V), and if it is coupled to the first external voltage VGH, it can provide an operating voltage range of 32V. Therefore, The maximum operating voltage that the pump PUMP inside the TDDI drive integrated circuit TDIC can provide is VGH-VGL=32V-(-16V)=48V, which is greater than the maximum operating voltage of the gate drive integrated circuit GDIC of 40V, so the gate drive voltage is The body circuit GDIC can also obtain sufficient operating voltage to allow the TDDI panel to operate normally, but is not limited to this.

相較於先前技術，本發明之觸控與顯示驅動器整合(TDDI)面板驅動方法讓TDDI驅動積體電路透過外部接線耦接適當電壓，使得TDDI驅動積體電路在觸控期間能以元件最大耐壓進行同驅運作而有效避開製程最大電壓限制，同時閘極驅動積體電路亦可獲得其運作所需的足夠電壓而讓TDDI面板能夠正常運作。Compared with the prior art, the touch and display driver integrated (TDDI) panel driving method of the present invention allows the TDDI driving integrated circuit to be coupled to an appropriate voltage through external wiring, so that the TDDI driving integrated circuit can operate with the maximum endurance of the device during touch. The voltage is co-driven and operates effectively to avoid the maximum voltage limit of the process. At the same time, the gate drive integrated circuit can also obtain sufficient voltage required for its operation so that the TDDI panel can operate normally.

S10、S12:步驟 TDIC:觸控與顯示驅動器整合(TDDI)驅動積體電路 GDIC:閘極驅動積體電路 TDDI:TDDI驅動單元 PUMP:泵 T1:第一端 T2:第二端 C1:電容 C2:電容 SWH:內部開關 SWL:內部開關 VGH:VGH PUMP電源輸出 VGL:VGL PUMP電源輸出 GND:接地端 VGH_EXT:外部電壓 VGL_EXT:外部電壓 VGH_EXT_Big:外部電壓 VGL_EXT_Big:外部電壓 VGH_CAP_REF:VGH PUMP接腳 VGL_CAP_REF:VGL PUMP接腳 CTRL1:觸控控制訊號 CTRL2:觸控控制訊號 SW1:外部開關 SW2:外部開關 Offset1:偏移 VPP:同驅訊號的電壓區間 PSUB:基板電壓 VDPA:正電源工作電壓 VDNA:負電源工作電壓 SW3:內部開關 SW4:內部開關 CON1:控制單元 CON2:控制單元 MP:P型電晶體 MP1:P型電晶體 MP2:P型電晶體 MN2:N型電晶體 VDD:工作電壓 VSS:電源電壓 VGL_GD:外部電壓 LS:位準偏移驅動器 OFF:關閉 ON:開啟 S10, S12: steps TDIC: Touch and display driver integration (TDDI) driver integrated circuit GDIC: gate drive integrated circuit TDDI:TDDI drive unit PUMP: pump T1: first end T2: Second end C1: Capacitor C2: Capacitor SWH: internal switch SWL: internal switch VGH:VGH PUMP power output VGL:VGL PUMP power output GND: ground terminal VGH_EXT: external voltage VGL_EXT: external voltage VGH_EXT_Big: external voltage VGL_EXT_Big: external voltage VGH_CAP_REF: VGH PUMP pin VGL_CAP_REF:VGL PUMP pin CTRL1: Touch control signal CTRL2: Touch control signal SW1: external switch SW2: External switch Offset1:offset VPP: voltage range of co-drive signal PSUB: Substrate voltage VDPA: Positive power supply operating voltage VDNA: Negative power supply operating voltage SW3: Internal switch SW4: Internal switch CON1:Control unit CON2: Control unit MP: P-type transistor MP1:P-type transistor MP2:P-type transistor MN2: N-type transistor VDD: working voltage VSS: power supply voltage VGL_GD: external voltage LS: Level shift driver OFF: turn off ON: turn on

圖1繪示本發明之一較佳具體實施例中之觸控與顯示驅動器整合(TDDI)面板驅動方法之流程圖。FIG. 1 illustrates a flow chart of a touch and display driver integration (TDDI) panel driving method in a preferred embodiment of the present invention.

圖2至圖12分別繪示本發明之TDDI面板驅動方法應用於TDDI驅動積體電路與閘極驅動積體電路之不同實施例之示意圖。2 to 12 respectively illustrate different embodiments of the TDDI panel driving method of the present invention applied to a TDDI driving integrated circuit and a gate driving integrated circuit.

圖13繪示僅第二外部電壓VGL同驅之示意圖。FIG. 13 shows a schematic diagram of co-driver with only the second external voltage VGL.

圖14繪示第一外部電壓VGH_EXT_big與第二外部電壓VGL均同驅之示意圖。FIG. 14 is a schematic diagram showing that the first external voltage VGH_EXT_big and the second external voltage VGL are both driven together.

圖15及圖16分別繪示不用外接開關也可讓TDDI驅動積體電路運作在製程最大電壓限制以上之不同實施例之示意圖。Figures 15 and 16 respectively illustrate different embodiments that allow the TDDI driver integrated circuit to operate above the maximum voltage limit of the process without using an external switch.

圖17A及圖17B繪示位準偏移驅動器(Level shift driver)之一實施例。17A and 17B illustrate an embodiment of a level shift driver.

圖18A及圖18B繪示位準偏移驅動器之另一實施例。Figures 18A and 18B illustrate another embodiment of a level shift driver.

S10、S12:步驟 S10, S12: steps

Claims (12)

一種觸控與顯示驅動器整合(TDDI)面板驅動方法，包括下列步驟：(a)TDDI驅動積體電路透過外部接線耦接適當電壓，致使該TDDI驅動積體電路避開製程最大電壓限制；以及(b)使閘極驅動積體電路的第一端與第二端之間具有該閘極驅動積體電路運作所需電壓；其中，該閘極驅動積體電路的該第一端外接第一外部電壓且該閘極驅動積體電路的該第二端耦接該TDDI驅動積體電路。 A touch and display driver integrated (TDDI) panel driving method includes the following steps: (a) TDDI driving integrated circuit is coupled to an appropriate voltage through external wiring, causing the TDDI driving integrated circuit to avoid the maximum voltage limit of the process; and ( b) The voltage required for the operation of the gate driving integrated circuit is provided between the first end and the second end of the gate driving integrated circuit; wherein, the first end of the gate driving integrated circuit is externally connected to a first external voltage and the second terminal of the gate driving integrated circuit is coupled to the TDDI driving integrated circuit. 如請求項1所述的TDDI面板驅動方法，其中該閘極驅動積體電路的該第一端外接的該第一外部電壓為不同驅且該閘極驅動積體電路的該第二端接收同驅的第二外部電壓，該第二外部電壓係由該TDDI驅動積體電路內部產生或由該TDDI驅動積體電路根據外部低電壓產生。 The TDDI panel driving method according to claim 1, wherein the first external voltage connected to the first end of the gate driving integrated circuit is a different drive and the second end of the gate driving integrated circuit receives the same voltage. A second external voltage is driven, and the second external voltage is generated internally by the TDDI driving integrated circuit or is generated by the TDDI driving integrated circuit according to an external low voltage. 如請求項1所述的TDDI面板驅動方法，其中該TDDI驅動積體電路控制外部開關的運作使該閘極驅動積體電路的該第一端外接的該第一外部電壓為同驅且該閘極驅動積體電路的該第二端接收同驅的第二外部電壓，該第二外部電壓係由該TDDI驅動積體電路內部產生或由該TDDI驅動積體電路根據外部低電壓產生。 The TDDI panel driving method as described in claim 1, wherein the TDDI driving integrated circuit controls the operation of the external switch so that the first external voltage externally connected to the first end of the gate driving integrated circuit is co-driven and the gate The second terminal of the TDDI driving integrated circuit receives a co-driven second external voltage. The second external voltage is generated internally by the TDDI driving integrated circuit or is generated by the TDDI driving integrated circuit according to an external low voltage. 如請求項1所述的TDDI面板驅動方法，其中該閘極驅動積體電路的該第一端外接的該第一外部電壓為不同驅且該 TDDI驅動積體電路控制外部開關的運作使該閘極驅動積體電路的該第二端外接的第二外部電壓為同驅。 The TDDI panel driving method as claimed in claim 1, wherein the first external voltage externally connected to the first end of the gate driving integrated circuit is a different drive and the The TDDI driving integrated circuit controls the operation of the external switch so that the second external voltage connected to the second end of the gate driving integrated circuit is co-driven. 如請求項1所述的TDDI面板驅動方法，其中該TDDI驅動積體電路控制外部開關的運作使該閘極驅動積體電路的該第一端外接的該第一外部電壓為同驅且該TDDI驅動積體電路控制外部開關的運作使該閘極驅動積體電路的該第二端外接的第二外部電壓為同驅。 The TDDI panel driving method as described in claim 1, wherein the TDDI driving integrated circuit controls the operation of the external switch so that the first external voltage externally connected to the first end of the gate driving integrated circuit is co-driven and the TDDI The driving integrated circuit controls the operation of the external switch so that the second external voltage externally connected to the second end of the gate driving integrated circuit is co-driven. 如請求項1所述的TDDI面板驅動方法，其中該TDDI驅動積體電路控制外部開關的運作使該閘極驅動積體電路的該第一端外接的該第一外部電壓為同驅且該閘極驅動積體電路的該第二端外接第二外部電壓但不同驅。 The TDDI panel driving method as described in claim 1, wherein the TDDI driving integrated circuit controls the operation of the external switch so that the first external voltage externally connected to the first end of the gate driving integrated circuit is co-driven and the gate The second terminal of the extremely driven integrated circuit is externally connected to a second external voltage but is not driven. 如請求項1所述的TDDI面板驅動方法，其中當該閘極驅動積體電路的該第一端與該第二端分別耦接的該第一外部電壓及第二外部電壓均為同驅時，則該TDDI驅動積體電路進行觸控取樣的資料的雜訊變小。 The TDDI panel driving method according to claim 1, wherein when the first external voltage and the second external voltage respectively coupled to the first end and the second end of the gate driving integrated circuit are both co-driven , then the noise of the data used for touch sampling by the TDDI driver integrated circuit becomes smaller. 如請求項1所述的TDDI面板驅動方法，其中當該TDDI驅動積體電路的內部開關的端電壓不超出該製程最大電壓限制時，該TDDI驅動積體電路控制其內部開關的運作使該閘極驅動積體電路的該第一端外接的該第一外部電壓為同驅且該TDDI驅動積體電路控制其另一內部開關的運作使該閘極驅動積體電路的該第二端外接的第二外部電壓為同驅。 The TDDI panel driving method as described in claim 1, wherein when the terminal voltage of the internal switch of the TDDI driving integrated circuit does not exceed the maximum voltage limit of the process, the TDDI driving integrated circuit controls the operation of the internal switch so that the gate The first external voltage connected to the first terminal of the gate driving integrated circuit is co-driven and the TDDI driving integrated circuit controls the operation of its other internal switch so that the second terminal of the gate driving integrated circuit is externally connected. The second external voltage is co-driven. 如請求項1所述的TDDI面板驅動方法，其中該TDDI驅動積體電路外接的電壓共用內部開關，使其內部開關的端電壓不超出該製程最大電壓限制，該TDDI驅動積體電路控制該內部開關的運作使該閘極驅動積體電路的該第一端外接的該第一外部電壓為同驅且該TDDI驅動積體電路控制另一內部開關的運作使該閘極驅動積體電路的該第二端外接的第二外部電壓為同驅。 The TDDI panel driving method as described in claim 1, wherein the external voltage of the TDDI driving integrated circuit shares an internal switch so that the terminal voltage of the internal switch does not exceed the maximum voltage limit of the process, and the TDDI driving integrated circuit controls the internal switch. The operation of the switch causes the first external voltage externally connected to the first terminal of the gate driving integrated circuit to be co-driven and the TDDI driving integrated circuit controls the operation of another internal switch to cause the gate driving integrated circuit to The second external voltage connected to the second terminal is co-driven. 一種觸控與顯示驅動器整合(TDDI)面板驅動方法，包括下列步驟：(a)TDDI驅動積體電路透過外部接線耦接適當電壓，致使該TDDI驅動積體電路避開製程最大電壓限制；以及(b)使閘極驅動積體電路的第一端與第二端之間具有該閘極驅動積體電路運作所需電壓；其中，該閘極驅動積體電路的該第一端耦接該TDDI驅動積體電路且該閘極驅動積體電路的該第一端及該第二端分別外接第一外部電壓及第二外部電壓。 A touch and display driver integrated (TDDI) panel driving method includes the following steps: (a) TDDI driving integrated circuit is coupled to an appropriate voltage through external wiring, causing the TDDI driving integrated circuit to avoid the maximum voltage limit of the process; and ( b) The voltage required for the operation of the gate driving integrated circuit is provided between the first end and the second end of the gate driving integrated circuit; wherein, the first end of the gate driving integrated circuit is coupled to the TDDI The integrated circuit is driven and the first end and the second end of the gate driving integrated circuit are externally connected to a first external voltage and a second external voltage respectively. 如請求項10所述的TDDI面板驅動方法，其中該閘極驅動積體電路的該第一端外接的該第一外部電壓為同驅且該閘極驅動積體電路的該第二端外接的該第二外部電壓為不同驅，該第一外部電壓係由該TDDI驅動積體電路內部產生或由該TDDI驅動積體電路根據外部高電壓產生。 The TDDI panel driving method according to claim 10, wherein the first external voltage connected to the first end of the gate driving integrated circuit is co-driven and the second end of the gate driving integrated circuit is externally connected. The second external voltage is different driven, and the first external voltage is generated internally by the TDDI driving integrated circuit or generated by the TDDI driving integrated circuit according to an external high voltage. 如請求項10所述的TDDI面板驅動方法，其中該閘極 驅動積體電路的該第一端外接的該第一外部電壓為同驅且該TDDI驅動積體電路控制外部開關的運作使該閘極驅動積體電路的該第二端外接的該第二外部電壓為同驅，該第一外部電壓係由該TDDI驅動積體電路內部產生或由該TDDI驅動積體電路根據外部高電壓產生。 The TDDI panel driving method as described in claim 10, wherein the gate The first external voltage connected to the first end of the driving integrated circuit is co-driven and the TDDI driving integrated circuit controls the operation of the external switch so that the second external voltage connected to the second end of the gate driving integrated circuit is The voltage is co-driven, and the first external voltage is generated internally by the TDDI driving integrated circuit or generated by the TDDI driving integrated circuit according to an external high voltage.
TW111134770A 2022-09-14 2022-09-14 Touch and display driver integration (tddi) panel driving method TWI828315B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201316235A (en) * 2011-09-23 2013-04-16 Apple Inc Multi-mode voltages for touchscreens
US20210335301A1 (en) * 2018-02-26 2021-10-28 Chongqing Boe Optoelectronics Technology Co., Ltd. Gate drive circuit, touch display device and driving method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201316235A (en) * 2011-09-23 2013-04-16 Apple Inc Multi-mode voltages for touchscreens
US20210335301A1 (en) * 2018-02-26 2021-10-28 Chongqing Boe Optoelectronics Technology Co., Ltd. Gate drive circuit, touch display device and driving method

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