TWI684971B - Touch display driving method, touch display device and information processing device - Google Patents

Abstract

A touch display driving method includes: using a synchronization signal generating unit to transmit a display synchronization signal to a display driving unit, and transmitting a touch synchronization signal to a touch control unit, wherein the display driving unit is used to The display data provided by a buffer unit drives a display array. The touch control unit is used to drive a touch sensing array. During a display driving period, the synchronization signal generating unit sets the display synchronization signal to be effective so that The display driving unit can extract the display data from the buffer unit and set the touch synchronization signal to invalid to disable the touch control unit; and during a touch detection period, enable the synchronization signal generation unit The touch synchronization signal is set to be effective to enable the touch control unit to perform touch detection on the touch sensing array, and the display synchronization signal is set to be invalid to disable the display driving unit.

Description

Touch display driving method, touch display device and information processing device

The invention relates to a touch display device, in particular to a touch display device which can prevent the touch scan frame rate from being jointly affected when the display scan frame rate decreases.

The touch display device includes a touch display panel and a controller, wherein the touch display panel includes a display array and a touch sensing array composed of a plurality of touch sensors, and the controller The specification of the control display device generates a timing control signal. Figure 1 shows a waveform diagram of a timing control signal. As shown in FIG. 1, each scanning cycle of the timing control signal (TS) includes a touch period T and a display period D to perform a touch sensing operation on the touch sensing array and the The display array performs a screen display operation.

In addition, since the number of sensing elements of a general touch sensing array is much smaller than the number of pixels of a display array, the time of the touch period T usually only needs to be a small part of the display period D to satisfy one touch Control the scanning frame rate requirements of the sensing array. Generally speaking, the scanning frame rate of a touch sensing array can be equal to the scanning frame rate of a display array, or twice the scanning frame rate of a display array. For example, if the scan frame rate of a display array is 60 Hz, the scan frame rate of a touch sensing array is 60 Hz or 120 Hz.

However, based on certain specific requirements, the scan frame rate of some display arrays will be adjusted to 30 Hz or 90 Hz. In short, in the actual application of the touch display device, the scan frame rate of the display array of the display array is not fixed, but will be dynamically adjusted between 30 Hz and 90 Hz. Therefore, if the scanning frame rate of a touch sensing array is fixed at one and two times the scanning frame rate of a display array, when the scanning frame rate of the display array is adjusted down, the The scan frame rate may be too low to properly detect a touch operation.

Therefore, there is an urgent need for a novel touch display driving method in the art.

The main purpose of the present invention is to propose a touch display driving method, which can be A synchronization signal generating unit standing outside a display driving unit and a touch control unit sends a display synchronization signal for driving the display driving unit and a touch synchronization signal for driving the touch control unit to The display scan frame rate of a display drive circuit and the touch scan frame rate of a touch drive circuit can be independent of each other, so as to ensure that the touch scan frame rate is not insufficient when a variable display scan frame rate is provided.

To achieve the above object, a touch display driving method is proposed, which includes the following steps: (1) using a synchronization signal generating unit to transmit a display synchronization signal to a display driving unit, and transmitting a touch synchronization signal to a touch Control control unit, wherein the display drive unit is used to drive a display array of a touch display panel according to the display data provided by a buffer unit, and the touch control unit is used to drive a touch of the touch display panel Sensing array; (2) During a display driving period, enable the synchronization signal generating unit to set the display synchronization signal to be effective to enable the display driving unit to extract the display data from the buffer unit, and the touch Setting the control synchronization signal to invalid to disable the touch control unit; and (3) during a touch detection period, enabling the synchronization signal generation unit to set the touch synchronization signal to be effective to enable the touch control unit to The touch sensing array performs touch detection and sets the display synchronization signal to be invalid to stop the display driving unit from extracting the display data from the buffer unit.

In one embodiment, the buffer unit is a first-in first-out register, and a buffer capacity of the first-in first-out register is determined by a maximum time during the touch detection period and the display data is written to the first-in first-out The data writing speed of the register is determined.

In one embodiment, the display driving unit, the touch control unit, the buffer unit and the synchronization signal generating unit are integrated into a touch display driving chip, and initialization or resetting is completed on the touch display driving chip After that, the display synchronization signal is preset to be valid and the touch synchronization signal is preset to be invalid.

In addition, the present invention further proposes a touch display device having a touch display panel and a drive control circuit for driving the touch display panel. The drive control circuit includes a first A first-in first-out buffer, a control unit, a synchronization signal generating unit, a display driving unit, and a touch control unit, and the control unit is used to execute a touch display driving method, the method includes: (1) using The synchronization signal generating unit transmits a display synchronization signal to the display driving unit, and transmits a touch synchronization signal to the touch control unit, wherein the display driving unit is used for display provided by the first-in first-out register Data drives a display array of the touch display panel, the touch control unit is used to drive a touch sensing array of the touch display panel; (2) during a display driving period, the synchronization signal generating unit will The display synchronization signal is set to be effective to enable the display driving unit to extract the display data from the first-in first-out register, and the touch synchronization signal is set to be invalid to disable the touch control unit; and (3 ) During a touch detection period, enable the synchronization signal generation unit to set the touch synchronization signal to be effective to enable the touch control unit to perform touch detection on the touch sensing array, and set the display synchronization signal to Disable to stop the display driving unit from extracting the display data from the first-in first-out register.

In one embodiment, the first-in first-out register is coupled to a display controller to receive the display data.

In one embodiment, a buffer capacity of the first-in first-out buffer is determined by a maximum time during the touch detection period and a data writing speed in which the display data is written into the first-in first-out buffer.

In one embodiment, after the drive control circuit completes initialization or resetting, the display synchronization signal is preset to be valid and the touch synchronization signal is preset to be invalid.

In addition, the present invention further provides an information processing device having the aforementioned touch display device.

In a possible embodiment, the information processing device may be a smart phone, a tablet computer, a notebook computer, or an all-in-one computer.

<this invention>

S1‧‧‧ A synchronization signal generation unit is used to transmit a display synchronization signal to a display drive unit, and a touch synchronization signal to a touch control unit, wherein the display drive unit is provided by a buffer unit Display data drives a display array of a touch display panel, the touch control unit is used to drive a touch sensing array of the touch display panel

S2‧‧‧ During a display driving period, the synchronization signal generating unit sets the display synchronization signal to be effective to enable the display driving unit to extract the display data from the buffer unit and set the touch synchronization signal Disable to disable the touch control unit

S3‧‧‧ During a touch detection period, the synchronization signal generating unit sets the touch synchronization signal to be effective to enable the touch control unit to perform touch detection on the touch sensing array and synchronize the display The signal is set to invalid to stop the display driving unit from extracting the display data from the buffer unit

1‧‧‧Touch display drive circuit

2‧‧‧Display controller

3‧‧‧Touch display panel

10‧‧‧First in first out register

11‧‧‧Control unit

12‧‧‧ Synchronization signal generation unit

13‧‧‧Display drive unit

14‧‧‧Touch control unit

<Learning>

no

Figure 1 shows the signal waveform of the timing control signal; FIG. 2 shows a flowchart of a touch display driving method of the present invention; and FIG. 3 shows an architecture diagram of a group of touch display devices using the touch display driving method of the present invention.

In order to enable your review committee to further understand the structure, features, purposes, and advantages of the present invention, the drawings and the detailed description of the preferred embodiments are attached as follows.

[Please refer to FIG. 2, which illustrates a flowchart of an embodiment of the touch display driving method of the present invention. As shown in FIG. 2, the touch display driving method includes: using a synchronization signal generating unit to transmit a display synchronization signal to a display driving unit, and transmitting a touch synchronization signal to a touch control unit, wherein the The display driving unit is used to drive a display array of a touch display panel according to the display data provided by a buffer unit, and the touch control unit is used to drive a touch sensing array of the touch display panel (step S1 ); During a display drive, the synchronization signal generation unit sets the display synchronization signal to be effective to enable the display drive unit to extract the display data from the buffer unit, and the touch synchronization signal is set to invalid Disabling the touch control unit (step S2); and during a touch detection period, causing the synchronization signal generating unit to set the touch synchronization signal to be effective to enable the touch control unit to the touch sensing array Perform touch detection and set the display synchronization signal to invalid to stop the display driving unit from extracting the display data from the buffer unit (step S3).

In step S1, the buffer unit is a first-in first-out buffer, and a buffer capacity of the first-in first-out buffer is determined by a maximum time during the touch detection period and the display data is written to the first-in first-out buffer The data writing speed of the device is determined.

In addition, preferably, the display driving unit, the touch control unit, the buffer unit and the synchronization signal generating unit are integrated into a touch display driving chip, and initialization or resetting is completed on the touch display driving chip After that, the display synchronization signal is preset to be valid and the touch synchronization signal is preset to be invalid.

In addition, in order to highlight the technical features of the present invention, the present invention further provides a touch display device. Please refer to FIG. 3, which illustrates a block diagram of an embodiment of the touch display device of the present invention. As shown in FIG. 3, the touch display device has a touch display panel 3 and is used to drive the touch display panel One of the three drive control circuits 1, the drive control circuit 1 includes a first-in first-out register 10, a control unit 11, a synchronization signal generation unit 12, a display drive unit 13 and a touch control unit 14, and the control The unit 11 is used to execute a touch display driving method. The method includes: (1) using the synchronization signal generating unit 12 to transmit a display synchronization signal to the display driving unit 13 and transmitting a touch synchronization signal to the touch control unit 14 Among them, the display driving unit 13 is used to drive a display array of the touch display panel 3 according to the display data provided by the first-in first-out register 10, and the touch control unit 14 is used to drive a touch of the touch display panel 3 Sensing array; (2) During a display driving period, the synchronization signal generating unit 12 sets the display synchronization signal to be effective to enable the display driving unit 13 to extract the display data from the first-in first-out buffer 10, and Disable the touch synchronization signal to disable the touch control unit 14; and (3) During a touch detection period, enable the synchronization signal generation unit 12 to set the touch synchronization signal to be effective to enable the touch control unit 14 Perform touch detection on the touch sensing array, and set the display synchronization signal to invalid to stop the display driving unit 13 from extracting the display data from the first-in first-out buffer 10.

In addition, the first-in first-out buffer 10 is coupled to a display controller 2 to receive the display data.

In addition, a buffer capacity of the first-in first-out buffer 10 may be determined by a maximum time during the touch detection period and a data writing speed at which the display data is written into the first-in first-out buffer 10.

In addition, preferably, after the drive control circuit 1 completes initialization or resetting, the display synchronization signal is preset to be valid and the touch synchronization signal is preset to be invalid. In addition, during operation, the control unit 11 periodically enters an alternating active state by causing the display synchronization signal and the touch synchronization signal to provide a variable display frame rate and ensure that the touch sensing frame rate does not insufficient.

According to the above description, the present invention further provides an information processing device with a touch display device as shown in FIG. 3.

In a possible embodiment, the information processing device may be a smart phone, a tablet computer, a notebook computer, or an all-in-one computer.

In this way, the above has fully and clearly explained the principles, technical means and technical spirit of the present invention; and, through the above, the present invention has the following advantages: the touch display driving method of the present invention can enable display by a simple control circuit The display scan frame rate of the drive circuit and the touch scan frame rate of the touch drive circuit can be independent of each other, so as to ensure that the touch scan frame rate is not insufficient when a variable display scan frame rate is provided.

It must be emphasized that the aforementioned disclosure in this case is a preferred embodiment, and any part of the modification or modification that originates from the technical idea of this case and is easily inferred by those who are familiar with the art, does not deviate from the patent of this case. Power category.

In summary, regardless of the purpose, means and efficacy of this case, it shows that it is very different from the conventional technology, and its first invention is practical and practical, and it does meet the patent requirements of the invention. I urge your review committee to investigate and give the patent as soon as possible. Society is for supreme prayer.

S1‧‧‧ A synchronization signal generation unit is used to transmit a display synchronization signal to a display drive unit, and a touch synchronization signal to a touch control unit, wherein the display drive unit is provided by a buffer unit Display data drives a display array of a touch display panel, the touch control unit is used to drive a touch sensing array of the touch display panel

S2‧‧‧ During a display driving period, the synchronization signal generating unit sets the display synchronization signal to be effective to enable the display driving unit to extract the display data from the buffer unit and set the touch synchronization signal Disable to disable the touch control unit

S3‧‧‧ During a touch detection period, the synchronization signal generating unit sets the touch synchronization signal to be effective to enable the touch control unit to perform touch detection on the touch sensing array and synchronize the display The signal is set to invalid to stop the display driving unit from extracting the display data from the buffer unit

Claims (9)

A touch display driving method includes the following steps: (1) using a synchronization signal generating unit to transmit a display synchronization signal to a display driving unit, and transmitting a touch synchronization signal to a touch control unit, wherein the display driving The unit is used to drive a display array of a touch display panel according to the display data provided by a cache unit, and the touch control unit is used to drive a touch sensing array of the touch display panel; (2) During a display driving period, enable the synchronization signal generating unit to set the display synchronization signal to be valid to enable the display driving unit to extract the display data from the buffer unit, and set the touch synchronization signal to be invalid to disable The touch control unit; and (3) during a touch detection period, causing the synchronization signal generation unit to set the touch synchronization signal to be effective to enable the touch control unit to perform touch detection on the touch sensing array And set the display synchronization signal to invalid to stop the display drive unit from extracting the display data from the buffer unit. The touch display driving method as described in item 1 of the patent application scope, wherein the buffer unit is a first-in first-out buffer, and a buffer capacity of the first-in first-out buffer is determined by a maximum time during the touch detection period And a data writing speed at which the display data is written to the first-in first-out buffer is determined. The touch display driving method as described in item 1 of the patent application range, wherein the display driving unit, the touch control unit, the buffer unit and the synchronization signal generating unit are integrated in a touch display driving chip, and After the touch display driver chip is initialized or reset, the display synchronization signal is preset to be valid and the touch synchronization signal is preset to be invalid. A touch display device has a touch display panel and a drive control circuit for driving the touch display panel. The drive control circuit includes a first-in first-out register, a control unit, and a synchronization signal generation unit. A display driving unit and a touch control unit, and the control unit is used to execute a touch display driving method, the method includes: (1) The synchronization signal generating unit is used to transmit a display synchronization signal to the display driving unit, and a touch synchronization signal to the touch control unit, wherein the display driving unit is used for the first-in first-out register The provided display data drives a display array of the touch display panel, and the touch control unit is used to drive a touch sensing array of the touch display panel; (2) During a display driving period, the synchronization The signal generating unit sets the display synchronization signal to be effective to enable the display driving unit to extract the display data from the first-in first-out register, and sets the touch synchronization signal to be invalid to disable the touch control unit And (3) During a touch detection period, the synchronization signal generation unit sets the touch synchronization signal to be effective to enable the touch control unit to perform touch detection on the touch sensing array and display the display The synchronization signal is set to be invalid to stop the display driving unit from extracting the display data from the first-in first-out register. The touch display device as described in item 4 of the patent application scope, wherein the first-in first-out register is coupled to a display controller to receive the display data. The touch display device as described in item 4 of the patent application scope, wherein a buffer capacity of the first-in first-out buffer is determined by a maximum time during the touch detection period and the display data is written to the first-in first-out The data writing speed of the register is determined. The touch display device according to item 4 of the patent application scope, wherein after the drive control circuit is initialized or reset, the display synchronization signal is preset to be effective and the touch synchronization signal is preset Is invalid. An information processing device having the touch display device as described in any one of the patent application items 4-7. The information processing device as described in item 8 of the patent application scope is a device selected by the group consisting of a smart phone, a tablet computer, a notebook computer and an all-in-one computer.

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