CN104238836A - Touch display device and driving and sensing method thereof - Google Patents

Abstract

The invention provides a touch display device and a driving and sensing method thereof. The touch electrode layer is provided with a plurality of driving lines and a plurality of sensing lines. The display panel has a plurality of frame times. The driving sensing circuit is electrically connected with the touch electrode layer, drives the driving lines and receives a plurality of sensing signals from the sensing lines, and has a full-time driving sensing mode and a partial-time driving sensing mode. At the nth frame time of the display panel, the driving sensing circuit operates in the full-time driving sensing mode, at the (n + 1) th frame time of the display panel, the driving sensing circuit operates in the partial-driving sensing mode, and n is defined as a positive integer. The touch display device and the driving sensing method thereof have the advantages of full-time driving sensing and neutral-time driving sensing at the same time, and further overcome the problems of noise and insufficient neutral time.

Description

Touch display device and driving and sensing method thereof

technical field

The invention relates to a touch display device and a driving and sensing method thereof.

Background technique

With the advancement of technology, touch technology has been widely used in various electronic products. For the touch display device, because the user can perform various functions by touching the display screen of the touch display device, it can simplify the complexity of the user's operation, and is more and more popular among consumers. .

In existing touch display devices, there are roughly two driving and sensing modes for touch electrodes, one is full time driving and sensing mode (full time driving and sensing mode) and the other is driving and sensing in idle time. mode (blanking time driving and sensing mode). Among them, full-time driving sensing can also be called fast asynchronous driving sensing, which means that the touch chip sends a driving signal and receives a sensing signal; The time of the received sensing signal falls within the idle time of the display panel.

Please refer to FIG. 1A , which shows a schematic diagram of performing full-time driving sensing. Since the full-time driving and sensing is continuously driven and sensed, it has a high signal return rate, but in order to avoid being interfered by the display data signal in the display panel, the full-time driving and sensing needs to be performed with a higher voltage. Drive, so it consumes more power. In addition, when the first scan line of the display panel is turned on (as shown by the dotted line a), the noise caused by it will affect the accuracy of the full-time driving sensing, so the corresponding driving sensing signal received at this time is affected by the display noise. Interference makes it difficult to judge the touch signal (as shown in the slashed area). Furthermore, when the display panel displays a special pattern, such as a black and white staggered array pattern, noise will also be generated, so all corresponding driving and sensing signals are also incorrect, thus easily causing malfunction of the touch display device.

In addition, please refer to FIG. 1B , which shows a schematic diagram of the idle time driving sensing. Driving and sensing during the idle time b is less likely to be interfered by the display data signal. Although the signal return rate is lower, the ability to resist noise is better. However, as the resolution of the display panel increases, the idle time will be shortened and the time for driving and sensing the touch chip will be compressed. If the driving sensing cannot be completed within the idle time (as shown by the dotted line), it will also cause malfunction of the touch display device.

Therefore, how to provide a touch display device and its driving and sensing method, which can simultaneously have the advantages of both full-time driving and sensing and idle time driving and sensing, so as to overcome the challenges of noise and insufficient idle time, has become important. one of the subjects.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a touch display device and its drive that can have both the advantages of full-time driving sensing and idle time driving sensing, thereby overcoming the challenges of noise and insufficient idle time. sensing method.

To achieve the above purpose, the touch display device according to the present invention includes a touch electrode layer, a display panel and a driving and sensing circuit. The touch electrode layer has a plurality of driving lines and a plurality of sensing lines. The display panel has multiple frame times. The driving sensing circuit is electrically connected with the touch electrode layer (electrically connected), the driving sensing circuit drives the driving lines and receives a plurality of sensing signals from the sensing lines, the driving sensing circuit has a full-time driving sensing mode and a portion of drive-sensing mode. At the nth frame time of the display panel, the driving sensing circuit operates in the full-time driving sensing mode, at the n+1th frame time of the display panel, the driving sensing circuit operates in the partial driving sensing mode, n Defined as a positive integer.

In order to achieve the above object, according to a driving sensing method of a touch display device of the present invention, the touch display device has a touch electrode layer, a display panel, a drive sensing circuit and a noise detection circuit, and the touch electrode The layer has multiple driving lines and multiple sensing lines, and the display panel has multiple frame times. The driving and sensing circuit is electrically connected to the touch electrode layer, and the noise detection circuit is electrically connected to the driving and sensing circuit. The driving and sensing method includes: driving the driving lines by the driving and sensing circuit, and receiving multiple signals from the sensing lines. sensing signals; and the driving sensing circuit is controlled by the noise detection circuit according to the sensing signals, wherein, at the nth frame time of the display panel, the driving sensing circuit operates in a full-time driving sensing mode, and In the n+1th frame time of the display panel, the driving sensing circuit operates in a part of the driving sensing mode, and n is defined as a positive integer.

In one embodiment, the driving sensing method is applied to a mutual induction capacitive touch panel structure or a self induction capacitive touch panel structure.

In one embodiment, the touch display device further includes a noise detection circuit electrically connected to the driving and sensing circuit, and the noise detecting circuit controls the driving and sensing circuit according to the sensing signals.

In one embodiment, the partial driving sensing mode is an idle time of operating the display panel.

In one embodiment, when the sum of the sensing signals is greater than a threshold, the driving sensing circuit switches from the full-time driving sensing mode to the partial driving sensing mode.

In one embodiment, when the sum of signal differences between two adjacent sensing signals is greater than a threshold, the driving sensing circuit switches from the full-time driving sensing mode to the partial driving sensing mode.

In one embodiment, each sensing signal is compared with a threshold value, and when each sensing signal is greater than the threshold value by an amount greater than a preset value, the driving sensing circuit is switched from the full-time driving sensing mode to the partial driving sensing mode .

In one embodiment, in the partial driving sensing mode, the driving sensing circuit drives part of the driving lines and receives the sensing signals from part of the sensing lines during a gap time, and driving another part of the driving lines and receiving the sensing signals from another part of the sensing lines in another part of the sensing lines during another idle time.

Based on the above, in a touch display device and its driving and sensing method according to the present invention, the driving and sensing are controlled according to the sensing signals when the display panel is in the driving and sensing mode of adjacent frames. The circuit switches between a full-time driving sensing mode and a part driving sensing mode. Wherein, when the noise interference is large, the driving sensing circuit can be switched to a partial driving sensing mode, so as to avoid the noise interference and overcome the problem of insufficient idle time. In addition, when the noise interference is small, the driving sensing circuit can be switched to a full-time driving sensing mode to obtain a higher signal return rate and improve the reliability of touch sensing. Therefore, the touch display device and its driving sensing method of the present invention can simultaneously have the advantages of full-time driving sensing and idle time driving sensing, thereby overcoming the challenges of noise and insufficient idle time.

Description of drawings

1A is a schematic diagram of full-time drive sensing;

FIG. 1B is a schematic diagram of driving sensing during a neutral time;

FIG. 2 is a schematic functional block diagram of a touch display device according to a preferred embodiment of the present invention;

3A is a schematic waveform diagram of a frame signal of the display panel of FIG. 2;

FIG. 3B is a schematic waveform diagram of two adjacent data scanning signals of the display panel of FIG. 2;

4 is a schematic diagram of driving and sensing mode switching;

5A and 5B are schematic diagrams of the first noise detection method;

6A and 6B are schematic diagrams of the second noise detection method;

7A and 7B are schematic diagrams of a third noise detection method;

Fig. 8 is a schematic circuit diagram of a noise detection circuit of the present invention;

9 is a schematic flowchart of a driving and sensing method for a touch display device according to a preferred embodiment of the present invention;

FIG. 10 is another schematic flowchart of a driving and sensing method for a touch display device according to a preferred embodiment of the present invention.

reference sign

1: Touch display device

11: Touch electrode layer

12: Display panel

13: Drive sensing circuit

14: Noise detection circuit

15: Signal processing circuit

16: System circuit

a: dotted line

b: idle time

AMP: operational amplifier

C1: capacitance

D: Counter

D1～D16: signal difference

G: NOR logic gate

S01～S03: Steps

S1: first signal

S2: second signal

Sc1～ScN: Sensing signal

T1: display time

T2: V-neutral time

T3: frame time

T4: H-neutral time

Th: Threshold

Tx: drive signal

R1, R2: resistance

V1: variable voltage

Detailed ways

A touch display device and its driving and sensing method according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

Please refer to FIG. 2 , which is a functional block diagram of a touch display device 1 according to a preferred embodiment of the present invention. The touch display device 1 can be, for example but not limited to, a tablet computer, a smart phone, a global positioning system (global positioning system) or an electronic device with a touch screen. In addition, the touch display device 1 can be applied to a self-inductive capacitive touch panel structure or a mutual inductive capacitive touch panel structure, which is not limited.

The touch display device 1 includes a touch electrode layer 11 , a display panel 12 , a driving sensing circuit 13 and a noise detection circuit 14 . In addition, the touch display device 1 further includes a signal processing circuit 15 and a system circuit 16 .

The touch electrode layer 11 has a plurality of driving lines and a plurality of sensing lines (not shown).

The display panel 12 can be, for example but not limited to, a liquid crystal display panel, or an organic light emitting display panel. Here, a liquid crystal display panel is taken as an example. Wherein, the touch electrode layer 11 can be arranged on a color filter substrate of the liquid crystal display panel and be located on the color filter substrate, or be located between the color filter substrate and a thin crystal transistor substrate of the liquid crystal display panel, so that the touch The display device becomes a TOD (touch on display) touch device. However, in other implementations, the touch electrode layer 11 can also be disposed outside the liquid crystal display panel and on another substrate, so that the touch display device 1 has a single glass touch panel (One Glass Solution, OGS) touch device. In addition, the display panel 12 has multiple frame times.

The driving sensing circuit 13 is electrically connected to the touch electrode layer 11, wherein the driving sensing circuit 13 drives a plurality of driving lines of the touch electrode layer 11, and receives a plurality of sensing signals Sc1˜ScN from the sensing lines. , N is defined as a positive integer. Here, the driving sensing circuit 13 may include a driving circuit and a sensing circuit, the driving circuit is responsible for driving the driving lines, and the sensing circuit is responsible for receiving the sensing signals Sc1˜ScN (touch sensing signals). Wherein, the driving sensing circuit 13 can work in a driving and sensing all the time mode or a partial driving and sensing mode. Here, driving multiple driving lines and receiving multiple sensing signals in the full-time driving sensing mode is operated within the frame time of the display panel 12, wherein driving multiple driving lines and receiving multiple sensing signals is shown in FIG. There is no limitation on how to distribute the frame time, it can be evenly distributed in the time interval, or can be concentrated in a certain period of time, as long as it belongs to the frame time. In addition, there is no limit to the number of times of driving multiple driving lines and receiving multiple sensing signals. If time permits, the more times of driving multiple driving lines and receiving multiple sensing signals, the better the sensitivity to touch. . The driving of multiple driving lines and receiving of multiple sensing signals in the partial driving sensing mode is a blanking time (blanking time) of the display panel 12, wherein driving multiple driving lines and receiving multiple sensing signals can be Completed in different slots. The display time plus the idle time is collectively referred to as a frame time of the display panel 12 . The display time is the time when the display panel 12 can display an image frame (data signal is transmitted), and the idle time is the time when the image frame is not displayed (data signal is not transmitted). Further, the blanking time can be divided into V-blanking time and H-blanking time.

Hereinafter, please refer to FIG. 3A and FIG. 3B to illustrate the V-neutral time and the H-neutral time. 3A is a schematic waveform diagram of a frame signal of the display panel 12 , and FIG. 3B is a schematic waveform diagram of two adjacent data scanning signals of the display panel 12 .

As shown in FIG. 3A , T3 represents a frame time, and T1 represents a display time. During the display time T1, the scan lines are sequentially turned on from the first to the last, so as to respectively transmit data signals to the pixel electrodes of the pixels of the display panel 12 through the data lines. In addition, T2 is a V-gap time (T1+T2=T3), and the V-gap time is the time when the data signal is not transmitted. pass time.

In addition, as shown in FIG. 3B , the H-gap time refers to the time difference between the end of the Nth scanning signal and before the transmission of the N+1th scanning signal (T4 in FIG. 3 is the H-gap time). Therefore, the partial drive sensing mode of the present invention can operate on the V-neutral time and the H-neutral time of the display panel 12 , and is not particularly limited.

Please refer to FIG. 2 again, and please also refer to FIG. 4 , the noise detection circuit 14 is electrically connected to the driving sensing circuit 13 . The noise detection circuit 14 receives and controls the operation of the driving and sensing circuit 13 according to the sensing signals Sc1 -ScN. Wherein, in the driving sensing mode of the adjacent frame time of the display panel 12, the noise detection circuit 14 controls the driving sensing circuit 13 in the full-time driving sensing mode and partial driving sensing mode according to the sensing signals Sc1-ScN to switch between. In other words, as shown in FIG. 4 , the noise detection circuit 14 can control the operation mode of the drive sensing circuit 13 according to the signal conditions of the sensing signals Sc1˜ScN (such as the influence of noise), for example, when the noise detection circuit 14 judges that the sensing signal When Sc1˜ScN are too much affected by the noise, the driving sensing circuit 13 is switched from the full-time driving sensing mode to the partial driving sensing mode. Conversely, when the noise detection circuit 14 judges that the influence of noise in the sensing signals Sc1˜ScN is relatively small, the driving sensing circuit 13 can be switched from the partial driving sensing mode to the full-time driving sensing mode, so that the touch display device 1 simultaneously It combines the advantages of full-time drive sensing and dead-time drive sensing to overcome the challenges of noise and insufficient dead time.

Three noise detection methods are given below to further illustrate how the noise detection circuit 14 judges the signal status of the sensing signals Sc1 -ScN. It should be noted that the following are examples only, and should not be used to limit the present invention. In addition, in the following three kinds of noise detection, the drive sensing circuit 13 is operated in the full-time drive sensing mode as an example to obtain a higher signal return rate, but when the noise detection circuit detects high noise Time to switch to partial drive sensing mode.

The first noise detection method is as follows: please refer to FIG. 5A and FIG. 5B , the noise detection circuit 14 performs signal detection according to the signal sum of the sensing signals Sc1-ScN, for example, the sum of the voltage values of the sensing signals Sc1-ScN. judgment of the situation. Wherein, when the sum of all the sensing signals Sc1-ScN is greater than a threshold value, it means that the touch electrode layer 11 is disturbed, and the noise detection circuit 14 can control the driving sensing circuit 13 in the next frame time interval. time, switch from the full-time driving sensing mode to the partial driving sensing mode.

As shown in Figure 5A, each number is a sensing signal, the sum of the sensing signals is 459, and the threshold is 800 as an example, because the sum of the sensing signals is less than the threshold, so the noise detection circuit 14 judges that within the frame time , the sensing signal is less disturbed by noise, and the switching of the driving sensing mode is not performed.

In addition, as shown in FIG. 5B , the sum of the sensing signals is 1588, and the threshold is 800 as an example. Since the sum of the sensing signals is greater than the threshold, the noise detection circuit 14 judges that the sensing signal is interfered by noise within this frame time. is larger, then the driving sensing circuit 13 is switched from the full-time driving sensing mode to the partial driving sensing mode at the idle time of the next frame time.

In other words, when the sum of the sensing signals Sc1 ˜ ScN is greater than the threshold, the noise detection circuit 14 judges that the sensing signals Sc1 ˜ ScN are affected by noise and cause abnormality. Wherein, the source of the noise is, for example, the interference from external signals or the change of the voltage level of the special display data signal. At this time, the sensing signals Sc1-ScN may not be normal touch signals, so the noise detection circuit 14 is shown in the next figure. During the blank time of the frame time, the driving sensing mode of the driving sensing circuit 13 is switched to switch from the full-time driving sensing mode to the partial driving sensing mode, so that the noise will not interfere with the subsequent display time. to sense the sensing signals Sc1˜ScN, thereby avoiding the influence of noise.

In addition, the second noise detection method is as follows: Please refer to FIG. 6A and FIG. 6B , the noise detection circuit 14 is based on the sum of the signal differences of two adjacent sensing signals Sc1-ScN, for example, two adjacent The sum of the voltage differences of the sensing signals Sc1-ScN is used to determine whether the sensing signals Sc1-ScN are disturbed by noise. Wherein, when the sum of the signal differences of two adjacent sensing signals Sc1-ScN is greater than a threshold, the noise detection circuit 14 controls the driving sensing circuit 13 to be driven and sensed by full-time during the next frame time. Mode switch to partial drive sensing mode. Here, the difference between two adjacent sensing signals refers to the voltage difference between the sensing signals generated by the touch electrodes of two adjacent touch electrode layers 11 , such as the voltages of the sensing signal Sc1 and the sensing signal Sc2. difference, the voltage difference between the sensing signal Sc2 and the sensing signal Sc3, etc., and so on, to mathematically represent the signal difference between two adjacent sensing signals, such as Sc2-Sc1, Sc3-Sc2, ..., ScN-Sc( N-1) etc. When the sum of all the signal differences between the sensing signals Sc1-ScN is greater than the threshold value, the noise detection circuit 14 judges that the sensing signals Sc1-ScN are affected by noise and cause an abnormality, so the driving sensing circuit 13 can be driven The sensing mode is switched to avoid the influence of noise. The above-mentioned difference between two adjacent pairs is only an example rather than a limitation, and any difference can be included in the scope of this embodiment as long as it can increase the judgment accuracy.

As shown in Figure 6A, the signal difference value Sc2-Sc1=0, Sc3-Sc2=0, Sc3-Sc2=D1, ..., Sc12-Sc11=D6 of the sensing signal, the sum of the signal difference value is 0+0+ D1+...+D6, if the sum of them is less than the threshold, the noise detection circuit 14 judges that the sensing signal is less disturbed by noise, and does not switch the driving sensing mode of the driving sensing circuit 13 . In addition, as shown in FIG. 6B , the signal difference Sc2-Sc1=D7, Sc3-Sc2=D8, Sc3-Sc2=D9, ..., Sc12-Sc11=D16 of the sensing signal, the sum of the signal difference is D7+ D8+D9+...+D16, if the sum is greater than the threshold, then the noise detection circuit 14 judges that the sensing signal is greatly disturbed by the noise within the frame time, and will drive the sensing signal during the next frame time. The circuit 13 switches from the full-time driving sensing mode to the partial driving sensing mode.

In addition, the third noise detection method is: please refer to FIG. 7A and FIG. 7B , the noise detection circuit 14 judges the signal status according to each sensing signal Sc1-ScN, for example, the voltage value of each sensing signal Sc1-ScN. Wherein, the noise detection circuit 14 compares each of the sensing signals Sc1-ScN with a threshold, for example, when the signal voltage values of the sensing signals Sc1-ScN are greater than the threshold by a number greater than a preset value, the noise detection circuit 14 controls The driving sensing circuit 13 switches from the full-time driving sensing mode to the partial driving sensing mode during the idle time of the next frame time.

As shown in FIG. 7A, the sensing signal Sc5 and the sensing signal Sc12 are greater than the threshold (Th), so the number of sensing signals greater than the threshold is 2. If the default value is 2 as an example, since the sensing signal greater than the threshold The number of is not greater than the preset value, so the noise detection circuit 14 judges that within this frame time, the sensing signal is less disturbed by noise, and does not switch the driving sensing mode of the driving sensing circuit 13 .

In addition, as shown in FIG. 7B , the sensing signals greater than the threshold are Sc1, Sc2, Sc5, Sc9, and Sc12, and the number is 5 greater than the preset value, so the noise detection circuit 14 judges that the sensing signal is received within the frame time. The interference of noise is relatively large, so the driving sensing circuit 13 is switched from the full-time driving sensing mode to the partial driving sensing mode at the idle time of the next frame time. In other words, the noise detection circuit 14 counts the number of abnormal sensing signals among the sensing signals Sc1-ScN, and when the number is too large, switches the driving sensing mode of the driving sensing circuit 13 to avoid the influence of noise.

Among them, when operating in the full-time driving sensing mode, the driving sensing circuit 13 can perform work such as transmitting driving signals and receiving sensing signals (and signal calculation processing) during display time and idle time, so it can have Higher signal return rate. In addition, when operating in the partial driving sensing mode, the driving sensing circuit 13 performs tasks such as transmitting the driving signal and receiving the sensing signal during the idle time (signal calculation and processing can be performed during the display time), and the driving sensing circuit 13 The driving and sensing of the display is less likely to be disturbed by the display data signal, therefore, the ability to resist noise is better.

Conversely, when the driving sensing circuit 13 operates in the partial driving sensing mode, if the noise detecting circuit 14 judges that no abnormal noise occurs according to the sensing signals Sc1˜ScN, the noise detecting circuit 14 can control the driving sensing circuit 13 to In the blank time of the next frame time, the partial driving sensing mode is switched to the full-time driving sensing mode to obtain a higher signal return rate, thereby improving the reliability of touch sensing. Therefore, the touch display device 1 of the present invention can simultaneously have the advantages of the full-time driving sensing mode and the partial driving sensing mode.

In the partial driving sensing mode of the present invention, during a gap time, the driving sensing circuit 13 drives part of the driving lines and receives the sensing signals from part of the sensing lines, and in another (for example Next) during the idle time, drive another part of the driving line and receive the sensing signals from the other part of the sensing line. For example, in the partial driving sensing mode, the driving sensing circuit 13 can drive half of the driving lines and receive half of the driving lines from the touch electrode layer 11 The sensing signal of the sensing line, and drive the remaining half during the gap time of the n+1th frame time (the nth frame time is adjacent to the n+1th frame time, n is a positive integer) One of the driving lines receives sensing signals from the other half of the sensing lines in the touch electrode layer 11 . For another example, in another embodiment, the driving sensing circuit 13 can also drive one-third of the driving lines and receive one-third of the driving lines from the touch electrode layer 11 The sensing signal of one of the sensing lines drives the remaining two-thirds of the driving lines and receives the sensing signals from the remaining two-thirds of the touch electrode layer 11 in the gap time of the n+1th frame time. Sensing signal of the measuring line. Or in another embodiment, all the touch electrodes of the touch electrode layer 11 are divided into three equal parts, and the drive sensing circuit 13 respectively drives one-third of the drive lines in three consecutive gap times. and receive sensing signals from one-third of the sensing lines. Therefore, in the partial driving sensing mode of the present invention, the touch electrode areas (drive lines, sense lines) of the touch electrode layer 11 are divided into different groups, and these groups are driven at different idle times. For a touch electrode layer with a larger size, because the touch electrode layer 11 has more touch electrodes (driving lines, sensing lines), it is difficult to complete all the touch electrodes in a single gap time. Therefore, through the partial driving and sensing mode of the present invention, by driving and sensing the sensing circuit 13 at different idle times, a part of the touch electrodes are respectively driven and sensed to effectively overcome the inability to operate in one The problem of completing the driving and sensing of all touch electrodes within the gap time (can solve a problem of insufficient gap time).

In addition, the signal processing circuit 15 is electrically connected to the drive sensing circuit 13 , the noise detection circuit 14 and the system circuit 16 . In the partial driving sensing mode, the signal processing circuit 15 processes a part of the sensing signal in one frame time, and processes another part of the sensing signal in another frame time, so as to realize driving in different frame time. The touch electrodes of different parts of the touch electrode layer 11 are sensed. Here, the signal processing circuit 15 can process signals during the display time and/or the idle time, and there is no special limitation.

In addition, the system circuit 16 is electrically connected to the display panel 12 and the signal processing circuit 15 . The system circuit 16 includes main circuits for driving and controlling the display panel 12 (for example, including a data driving circuit, a scanning driving circuit, a timing control circuit . . . ). Here, the system circuit 16 outputs a control signal to control the display panel 12 to perform corresponding actions according to the signal processing result of the signal processing circuit 15 .

In addition, please refer to FIG. 8 , which is a schematic circuit diagram of a noise detection circuit 14 of the present invention.

The noise detection circuit 14 includes an operational amplifier AMP, a variable voltage V1, a capacitor C1, two resistors R1, R2, a counter D and a NOR logic gate G. Wherein, the negative input terminal of the operational amplifier AMP is electrically connected to the variable voltage V1, which is a reference voltage threshold, and its positive input terminal receives the sensing signals Sc1˜ScN. Here, the operational amplifier AMP compares the sensing signals Sc1-ScN with the reference voltage threshold (variable voltage V1), and outputs a high level when the sensing signals Sc1-ScN are greater than the reference voltage, otherwise outputs a low level.

The counter D is electrically connected with the resistor R1, the capacitor C1 and the output terminal of the operational amplifier AMP. The counter D can count the number of transitions from high level to low level, or from low level to high level, in the output of the operational amplifier AMP, and output a first signal S1 accordingly to control the drive The sensing circuit 13 (not shown in the figure) is activated. For example, when the output of the operational amplifier AMP changes from a high level to a low level, the count of the counter D is increased by 1. When the number of counts of the counter D is greater than a certain value, it means that the sensing signals Sc1~ScN are interfered by many noises , therefore, the counter D can output the first signal S1 to notify the driving sensing circuit 13 to switch the driving sensing mode (for example, switching from the full-time driving sensing mode to the partial driving sensing mode), wherein the first signal S1 is a trigger signal for controlling the driving sensing circuit 13 to switch the driving sensing mode.

In addition, one input terminal of the NOR logic gate G is electrically connected to the output terminal of the operational amplifier AMP, the capacitor C1 , the resistor R1 and the resistor R2 , and the other input terminal of the NOR logic gate G receives a driving signal Tx output from the driving sensing circuit 13 . The NOR logic gate G outputs a second signal S2 according to the output of the operational amplifier AMP and the driving signal Tx to control when the driving sensing circuit 13 is ready to switch the driving sensing mode, wherein the second signal S2 is used to control the driving sensing The circuit 13 switches the interval signal of the driving sensing mode. In more detail, when the output of the operational amplifier AMP and the voltage level of the driving signal Tx are both low, the NOR logic gate G outputs the second signal S2 at a high level, thereby indicating that the first signal S1 can be at the low level. The interval control driving sensing circuit 13 switches the driving sensing mode.

For example, in FIG. 4, when the output of the first signal S1 is 1, the driving sensing circuit 13 can switch the driving control mode (such as switching from the full-time driving sensing mode to the partial driving sensing mode), But when the output of the second signal S2 is also 1 (for example, during the blank time of the next frame time), the driving sensing circuit 13 can really enter the partial driving sensing mode (the partial driving sensing mode operates on the display panel 12), otherwise it will still maintain the operation of the full-time drive sensing mode.

In addition, please refer to FIG. 9 , which is a schematic flowchart of a driving and sensing method for a touch display device according to a preferred embodiment of the present invention. In this embodiment, the driving and sensing method is used in conjunction with the touch display device 1 described above. The touch display device 1 has been described in detail above and will not be repeated here. The driving sensing method of the present invention includes step S01 and step S02.

In step S01, the driving and sensing circuit 13 drives the driving lines and receives a plurality of sensing signals Sc1˜ScN from the sensing lines.

In addition, in step S02, the noise detection circuit 14 controls the driving sensing circuit 13 according to the sensing signals Sc1˜ScN, wherein, during the nth frame time of the display panel 12, the driving sensing circuit 13 operates at a In the full-time driving and sensing mode, the driving and sensing circuit operates in a part of the driving and sensing mode during the n+1th frame time of the display panel, and n is defined as a positive integer.

In addition, please refer to FIG. 10 , which is another schematic flowchart of a driving and sensing method for a touch display device according to a preferred embodiment of the present invention.

In addition to the above step S01 and step S02, the driving sensing method may further include step S03, step S03 is: the signal processing circuit 15 processes part of the sensing signals within one frame time, and in another figure Another part of the sensing signals are processed within a frame time.

In addition, other technical features of the driving and sensing method of the touch display device have been described in detail above, and those of ordinary skill in the art to which the present invention pertains can understand the driving and sensing method of the present invention without any difference, so details are not repeated here.

To sum up the above, in a touch display device and its driving and sensing method according to the present invention, when the driving and sensing mode is in the adjacent frame time of the display panel, the driving and sensing circuit is controlled according to the sensing signals to Switch between a full-time drive-sensing mode and a part-time drive-sensing mode. Wherein, when the noise interference is large, the driving sensing circuit can be switched to a partial driving sensing mode, so as to avoid the noise interference and overcome the problem of insufficient idle time. In addition, when the noise interference is small, the driving sensing circuit can be switched to a full-time driving sensing mode to obtain a higher signal return rate and improve the reliability of touch sensing. Therefore, the touch display device and its driving sensing method of the present invention can simultaneously have the advantages of full-time driving sensing and idle time driving sensing, thereby overcoming the challenges of noise and insufficient idle time.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change without departing from the spirit and scope of the present invention shall be included in the scope of the claims.

Claims (10)

1. a touch control display apparatus, is characterized in that, described touch control display apparatus comprises:

One touch control electrode layer, has many drive wires and many sense wires;

One display panel, has multiple picture frame time; And

One driving sensing circuit, is electrically connected with described touch control electrode layer, and described driving sensing circuit drives described many drive wires and receives the multiple sensing signals from described many sense wires, and has a full-time driving sensing modes and part driving sensing modes;

Wherein, in the n-th picture frame time of described display panel, described driving sensing circuit operates in described full-time driving sensing modes, in (n+1)th picture frame time of described display panel, described driving sensing circuit operates in described part and drives sensing modes, and n is defined as a positive integer.

2. touch control display apparatus according to claim 1, is characterized in that, described touch control display apparatus more comprises:

One noise detecting circuit, is electrically connected with described driving sensing circuit, and described noise detecting circuit controls described driving sensing circuit according to described multiple sensing signal.

3. touch control display apparatus according to claim 2, is characterized in that, described part drives sensing modes to operate in a time dead of described display panel.

4. touch control display apparatus according to claim 3, it is characterized in that, when the signal summation of described multiple sensing signal is greater than a threshold value, described noise detecting circuit controls described driving sensing circuit and switches to described part driving sensing modes by described full-time driving sensing modes.

5. touch control display apparatus according to claim 3, it is characterized in that, when the summation of the signal difference of adjacent sensing signal is between two greater than a threshold value, described noise detecting circuit controls described driving sensing circuit and switches to described part by described full-time driving sensing modes and drive sensing modes.

6. touch control display apparatus according to claim 3, it is characterized in that, each described sensing signal compares with a threshold value respectively, when the quantity that each described sensing signal is greater than described threshold value is greater than a preset value, described driving sensing circuit switches to described part by described full-time driving sensing modes and drives sensing modes.

7. touch control display apparatus according to claim 2, it is characterized in that, when described part drives sensing modes, described many drive wires of described driving sensing circuit drive part in a time dead also receive described multiple sensing signal of the part of described many sense wires from part, and in another time dead, drive described many drive wires of another part and the described multiple sensing signal received from another part of described many sense wires of another part.

8. the driving method for sensing of a touch control display apparatus, it is characterized in that, described touch control display apparatus has a touch control electrode layer, a display panel, drives sensing circuit and a noise detecting circuit, described touch control electrode layer has many drive wires and many sense wires, described display panel has multiple picture frame time, described driving sensing circuit is electrically connected with described touch control electrode layer, and described noise detecting circuit is electrically connected with described driving sensing circuit, and described driving method for sensing comprises:

Drive described many drive wires by described driving sensing circuit, and receive the multiple sensing signals from described many sense wires; And

Described driving sensing circuit is controlled according to described multiple sensing signal by described noise detecting circuit, wherein, in the n-th picture frame time of described display panel, described driving sensing circuit operates in a full-time driving sensing modes, in (n+1)th picture frame time of described display panel, described driving sensing circuit operates in a part and drives sensing modes, and n is defined as a positive integer.

9. driving method for sensing according to claim 8, is characterized in that, described driving method for sensing is applied to a mutual inductance inductance capacitance formula Toutch control panel structure or a self-induction inductance capacitance formula Toutch control panel structure.

10. driving method for sensing according to claim 8, is characterized in that, described part drives sensing modes to operate in a time dead of described display panel.