TWI621981B - Touch panel and sensing method of touch panel - Google Patents

Abstract

A sensing method of a touch panel. The touch panel includes N control lines, M sets of sensing lines, and a touch sensing array having a plurality of sensors arranged in M columns and N rows. The N control lines are coupled to the N rows of sensors. The M sets of sensing lines are coupled to the M columns of sensors. The sensing method includes the steps of: alternately driving the N control lines to enable the N rows of sensors to detect a touch event in turn, wherein one P control line is driven to make each column sense There will be P sensors enabled at the same time, and P is a positive integer greater than 1 and less than N; and via the corresponding one of the sensing lines, the P sensors that receive the induced energy are generated. P sensing results, and generating a sensing output based on the P sensing results.

Description

Touch panel and sensing method of touch panel

The present invention relates to a touch panel sensing mechanism, and more particularly to a touch panel and a sensing method thereof for simultaneously detecting a touch event of a plurality of line sensors of a touch sensing array during a driving cycle.

A conventional touch panel uses a touch sensing array to detect touch events on the touch panel. However, once the distance between the finger and the touch sensing array increases, the induced electric field between the finger and the touch sensing array is reduced, and the signal-to-noise ratio of the touch sensing array is greatly reduced (signal-to- Noise, SNR). For example, when the user manipulates the touch panel with gloves, the user will obviously feel the decrease in touch sensitivity.

Therefore, there is a need for an innovative touch panel sensing mechanism that provides a good signal to noise ratio for a variety of control situations.

In view of the above, one of the objectives of the present invention is to provide a touch panel and a sensing method thereof for simultaneously detecting a touch event in a plurality of line sensors of a touch sensing array during a driving cycle. The above question.

According to an embodiment of the invention, a sensing method of a touch panel is disclosed. The touch panel includes a touch sensing array, N control lines, and M sets of sensing lines. The touch sensing array includes a plurality of sensors arranged in M columns and N rows. The N control lines are respectively coupled to the N rows of sensors, and the M sets of sensing lines are respectively coupled to the M rows of sensors. Both M and N are positive integers greater than one. The sensing method includes the steps of: alternately driving the N control lines to enable the N rows of sensors to detect a touch event on the touch panel, wherein one P control line is driven at a time. So that there will be P sensors in each column of sensors simultaneously enabled, and P is a positive integer greater than 1 and less than N; and coupled for each column of sensors via the column sensor a group of sensing lines, the P sensors that are simultaneously enabled are detected to detect P sensing results generated by the touch event, and corresponding to the P sensing results are generated by the column sensor One of the sensing outputs.

According to an embodiment of the invention, a touch panel is disclosed. The touch panel comprises a touch sensing array, N control lines, M sets of sensing lines, a control circuit and a sensing circuit. The touch sensing array includes a plurality of sensors arranged in M rows and N rows to detect a touch event on the touch panel, wherein M and N are positive integers greater than 1. The N control lines are respectively coupled to the N rows of sensors. The M sets of sensing lines are respectively coupled to the M columns of sensors. The control circuit is coupled to the N control lines for alternately driving the N control lines to enable the N rows of sensors to detect the touch event in turn, wherein the control circuit drives the P strips at the same time. The control lines are such that there are P sensors in each column of sensors that are simultaneously enabled, and P is a positive integer greater than one and less than N. The sensing circuit is coupled to the M sets of sensing lines, wherein for each column of sensors, the sensing circuit is coupled to the one set of sensing lines via the column sensor, and receives the P cells that are simultaneously enabled. The sensor detects P sensing results generated by the touch event, and generates a sensing output corresponding to the column sensor according to the P sensing results.

The touch panel sensing mechanism provided by the present invention can simultaneously drive/enable multiple rows of sensors in the touch sensing array in a single driving cycle, thereby equivalently expanding the size and increasing touch of the touch sensing array. Control the sensing range. Therefore, the touch panel using the touch panel sensing mechanism provided by the present invention can maintain a good signal to noise ratio under various control situations.

The touch panel sensing mechanism provided by the present invention can simultaneously drive/enable multiple rows of sensors in the touch sensing array in a single drive cycle, and can be used in each column of sensors. A plurality of sensing results corresponding to the plurality of sensors are used as a sensing output corresponding to a single sensing point on the touch sensing array. In other words, for each column sensor of the touch sensing array, one of the sensing outputs generated by a driving/sensing operation may come from a plurality of sensing results of the plurality of sensors. This means that the touch panel sensing mechanism provided by the present invention equivalently expands the size of the touch sensing array, wherein one of the sensing outputs corresponding to the single sensing point may include sensing results of the plurality of sensors. Rather than the sensing result of a single sensor. Therefore, even if the distance between the touch object (such as a finger or a stylus) and the touch sensing array is increased, a good signal to noise ratio can be maintained. The touch panel using the touch panel sensing mechanism provided by the present invention can have a wide touch sensing range. Further explanation is as follows.

Please refer to FIG. 1 , which is a schematic diagram of an embodiment of a touch panel of the present invention. The touch panel 100 can include, but is not limited to, a touch sensor array 110, N control lines CL ₁ to CL _N , M sets of sensing lines {SL ₁ } to {SL _M }, and a control. The circuit 120 and a sensing circuit 130, wherein M and N are both positive integers greater than one. In this embodiment, the touch sensing array 110 can include a plurality of sensors S _1,1 ～S _M,N (such as a plurality of capacitive touch sensors) arranged in M columns and N rows, and It can be used to detect a touch event TE on the touch panel 100. The N control lines CL ₁ to CL _N are respectively coupled to the N columns of sensors in the touch sensing array 110, wherein the M sensors in the same row are coupled to the same strip. Control line. That is, the plurality of sensors S _1,1 , S _2,1 , . . . , S _M,1 are all coupled to the control line CL ₁ , and the plurality of sensors S _1,2 , S _2,2 , . S _{M, 2} are both coupled to the control line CL ₂ , and so on. In addition, the M sets of sensing lines {SL ₁ } ～{SL _M } are respectively coupled to the M rows of sensors in the touch sensing array 110, wherein the N sensors in the same column Both are coupled to the same set of sensing lines. That is, the plurality of sensors S _1,1 , S _1,2 , . . . , S _1,N are all coupled to a set of sensing lines {SL ₁ }, a plurality of sensors S _2,1 , S _{2 , 2} , ..., S _{2, N} are all coupled to a set of sensing lines {SL ₂ }, and so on.

The control circuit 120 is coupled to the N control lines CL ₁ -CL _N and can enable/activate the N-line sensor to detect the touch by driving the N control lines CL ₁ -CL _N Event TE. In this embodiment, the control circuit 120 can alternately drive the N control lines CL ₁ -CL _N to enable/enable the N-line sensor to detect the touch event TE in turn, wherein each sensor can be The touch event TE is detected and enabled to generate a sensing result, and the control circuit 120 can simultaneously drive the P control lines (P is a positive integer greater than 1 and less than N) at a time to make each column sense There will be P sensors in the device that are enabled at the same time.

Next, the sensing circuit 130 coupled to the M sets of sensing lines {SL ₁ } to {SL _M } can be coupled to a set of sensing lines via each column of sensors, and receive the same in the column of sensors. The P sensing results generated by the P sensors in response to the touch event TE (ie, detecting the sensing result generated by the touch event TE), and based on the P sensing results A sensing output corresponding to the column sensor is generated. For example, the sensing circuit 130 may add the P sensing results (or perform other arithmetic processing, such as a weighting operation) on the P sensing results, and generate the sensing output accordingly.

In this embodiment, the sensing circuit 130 can receive corresponding P sensing results (represented by a set of sensing results {SR ₁ }) via the set of sensing lines {SL ₁ }, and generate a sense accordingly. Measuring output SO ₁ ; sensing circuit 130 may receive corresponding P sensing results (represented by a set of sensing results {SR ₂ }) via the set of sensing lines {SL ₂ }, and generate a sensing accordingly Output SO ₂ ; and so on. After the M sense outputs SO ₁ -SO _{M are} generated, the sensing circuit 130 can recognize the touch event TE (such as determining the touch position of the touch object) according to the M sense outputs SO ₁ -SO _M .

In some embodiments, the P control lines that are simultaneously driven by the control circuit 120 can be adjacent to each other. For example (but the invention is not limited thereto), the control circuit 120 may alternately drive the N control lines CL ₁ -CL _N according to a driving sequence, wherein the control circuit 120 is in at least one of the driving sequences Two control lines (P=2) adjacent to each other can be driven at the same time, thereby simultaneously enabling two rows of sensors adjacent to each other. The control circuit 120 can sequentially drive the plurality of control lines CL ₁ and CL ₂ , the plurality of control lines CL ₂ and CL ₃ , ..., the plurality of control lines CL _N-1 and CL _N and the plurality of control lines according to the driving sequence. In a practical example of CL _N and CL ₁ , for a column of sensors comprising a plurality of sensors S _1,1 , S _1,2 ,..., S _1,N , a plurality of sensors S _{1 , 1} and S _{1, 2} will be enabled/enabled in a first driving cycle, and the plurality of sensors S _{1, 2} and S _{1, 3} will be adjacent to the second driving of the first driving cycle It is enabled/enabled during the cycle, and so on.

In addition, when a plurality of sensors S _1,1 and S _1,2 are enabled, the sensing circuit 130 can receive a plurality of sensors S _1,1 and S _{1,2 to} detect the touch event TE Sensing result (that is, the set of sensing results {SR ₁ } includes sensing results generated by the plurality of sensors S _1,1 and S _1,2 ), and accordingly generating a sensing output SO ₁ ; When a plurality of sensors S _{1, 2} and S _{1, 3} are enabled, the sensing circuit 130 can receive a plurality of sensors S _{1, 2} and S _{1, 3 to} detect the sensing result generated by the touch event TE. (That is, the set of sensing results {SR ₁ } includes the sensing results produced by the plurality of sensors S _1,2 and S _1,3 ), and accordingly the sensing output SO _{1 is} generated. In short, in response to the driving operation of each driving cycle, the sensing circuit 130 can receive the sensing results generated by the plurality of sensors enabled in the column of sensors as the set of sensing results {SR ₁ } And generating a sensing output SO ₁ according to the set of sensing results {SR ₁ }. Since the sensing circuit 130 can generate the sensing output SO ₁ according to the driving operation of each driving cycle, the sensing output SO ₁ can be regarded as a sense corresponding to a single sensing point activated by the detection of the touch event TE. Measure the output.

Similarly, the plurality of sensing outputs SO ₂ ～ SO _M can be regarded as a sensing output corresponding to a single sensing point enabled for detection of the touch event TE. It is worth noting that since the sensing circuit 130 can generate a sensing output as a sensing point of a single sensing point according to the sensing results of a plurality of sensors, such as a plurality of sensors adjacent to/adjacent to each other. The output is increased, so that the intensity of the sensing signal corresponding to the single sensing point can be increased, thereby improving the signal-to-noise ratio of the touch panel 100.

The above description is for illustrative purposes only and is not intended to be a limitation of the invention. In a design change, the control circuit 120 can drive only one boundary control line (control line CL ₁ /CL _N ) in one drive cycle. For example, in the case where the control circuit 120 drives the N control lines CL ₁ to CL _N in turn according to a driving sequence and simultaneously drives two control lines at least once in at least one driving cycle of the driving sequence, the driving sequence The control lines driven by each of the plurality of driving cycles may be "CL ₁ and CL ₂ , CL ₂ and CL ₃ , ..., CL _N-1 and CL _N , CL _N " or "CL ₁ , CL ₁ and CL ₂ , CL ₂ and CL ₃ , ..., CL _N-1 and CL _N ′′, wherein the control circuit 120 can drive only one boundary control line (control line CL ₁ /CL _N ) in one driving cycle.

In another design variation, the control lines that are simultaneously driven by the control circuit 120 do not have to be adjacent to each other. In yet another design variation, the control circuit 120 can alternately drive the N control lines CL ₁ -CL _N by simultaneously driving more than two control lines at a time. In short, as long as the multiple control lines are simultaneously driven to drive the multi-line sensors in turn, and then the sensing results generated by the plurality of sensors in each column of sensors are generated. The touch panel sensing mechanism of the sense output, the design related changes all fall within the scope of the present invention in accordance with the spirit of the present invention.

FIG. 2 is a flow chart of an embodiment of a sensing method of the touch panel of the present invention, wherein the sensing method is applicable to the touch panel 100 shown in FIG. 1 . For convenience of explanation, the sensing method shown in FIG. 2 is explained in conjunction with the touch panel 100 shown in FIG. 1. However, this is not intended to be a limitation of the present invention. The sensing method shown in Fig. 2 can be summarized as follows.

Step 210: Start.

Step 220: alternately driving the N control lines CL ₁ ～ CL _N to enable the N-line sensors to detect the touch event TE on the touch panel 100 in turn, wherein there are N control lines CL ₁ ～ The P control lines among the CL _N are driven such that P sensors among each column of sensors are simultaneously enabled, and P is a positive integer greater than 1 and less than N.

Step 230: Receive, for each column of sensors, a pair of sensing lines coupled to the column sensor, and receive P sensings generated by the P sensors that are simultaneously enabled to detect the touch event TE. result. For example, the sensing circuit 130 can receive, via the set of sensing lines {SL ₁ }, a plurality of sensors S _1,1 , S _1,2 , . . . , S _{1,N in} one of the sensors. A plurality of sensing results respectively generated by a plurality of sensors.

Step 240: Generate a sensing output corresponding to the column sensor according to the P sensing results.

It should be noted that in step 220, a part of the P control lines respectively driven by the adjacent two driving periods may be identical. For example (but the invention is not limited thereto), the control circuit 120 may alternately drive the N control lines CL ₁ -CL _N according to a driving sequence, wherein in a first driving period of the driving sequence, the control The circuit 120 can simultaneously drive one of the N control lines CL ₁ -CL _N and the (P−1) second control line, and adjacent to the first driving period among the driving sequences In a second driving cycle, the control circuit 120 can simultaneously drive the (P−1) second control line and the third control line among the N control lines, wherein the third control line is different from the first Control line.

In an implementation example, the first control line may be adjacent to the (P−1) second control line, and the (P−1) second control line may be adjacent to the third control line. For example, in a case where the control circuit 120 simultaneously drives two control lines (P=2) among the N control lines CL ₁ to CL _N at a time, the first control line may be the control line CL ₁ , the ( The P−1) strip second control line may be the control line CL ₂ , and the third control line may be the control line CL ₃ . In another implementation example, the first control line or the third control line may not be adjacent to the (P−1) second control line. For example, in a case where the control circuit 120 simultaneously drives two control lines (P=2) among the N control lines CL ₁ to CL _N at a time, the first control line may be the control line CL _N-1 , The (P−1) second control line may be the control line CL _N , and the third control line may be the control line CL ₁ .

Since the skilled artisan will understand the operation details of the sensing method shown in FIG. 2 after reading the relevant paragraphs of FIG. 1, further description will not be repeated here.

In order to facilitate the understanding of the technical features of the present invention, the details of the sensing mechanism of the touch panel of the present invention will be further described by using one example of the touch panel 100 shown in FIG. It should be noted that it is also feasible to apply the touch panel sensing mechanism of the present invention to other circuit implementations based on the touch panel 100 shown in FIG. Please refer to FIG. 3 , which is a schematic diagram of an implementation example of one of the touch panels 100 shown in FIG. 1 . In this implementation, the touch panel 300 may include a control circuit 320, CL _N and M sense of a processing circuit 330, and FIG. 1 of the touch sensing array 110, N control lines CL ₁ ~ group The measurement lines {SL ₁ } to {SL _M }, wherein the control circuit 120 and the processing circuit 130 shown in FIG. 1 can be implemented by the control circuit 320 and the processing circuit 330, respectively. In addition, each set of sensing lines may include N sensing lines respectively coupled to N sensors among the corresponding one of the columns of sensors. Specifically, the set of sensing lines {SL ₁ } may include N sensing lines SL _1,1 -SL _1,N , which are respectively coupled to N sensors S _1,1 -S _1,N ; The group sensing line {SL ₂ } may include N sensing lines SL _2,1 to SL _2,N , which are respectively coupled to N sensors S _2,1 to S _2,N ; and so on.

The control circuit 320 can generate a driving signal SD (such as a modulated triangular wave signal or a modulated square wave signal) to the P-line sensor. A strip control line (P is a positive integer greater than 1 and less than N) to simultaneously enable P sensors in each column of sensors. The sensing circuit 330 can include, but is not limited to, a selection circuit 332 coupled to the processing circuit 334 and the M sets of sensing lines {SL ₁ } to {SL _M }. For each column of sensors, when the control circuit 320 simultaneously enables the P sensors in the column of sensors to detect the touch event TE, the selection circuit 332 can enable the P senses of the enablement. The P sense lines coupled to the device are coupled to the processing circuit 334 to transmit the P sensed results generated by the P sensors that are enabled to the processing circuit 334, and will not be enabled (NP The (NP) sense lines to which the sensors are coupled are uncoupled from the 334 processing circuit. In this way, the processing circuit 334 can receive the P sensing results to generate a corresponding one of the sensing outputs.

For example, but the invention is not limited thereto, the selection circuit 332 may include M multiplexer circuits 332_1 ～ 332_M (labeled as “MUX” respectively), which are respectively coupled to the M sets of sensing lines { SL ₁ }~{SL _M }. Processing circuit 334 can include M analog-to-digital converters (or integrating circuits) 334_1-334_M, each of which is labeled "ADC." Taking a column of sensors RS1 including N sensors S _1,1 ～S _1,M as an example, the multiplexer circuit 332_1 can generate the set of sensing results {SR ₁ } generated by the column sensor RS1. The analog to digital converter 334_1 is coupled to the analog digital converter 334_1 for outputting the sensed output SO ₁ .

In some embodiments, the selection circuit 330 can also couple the (NP) sensing lines to which the (NP) sensors that are not enabled are coupled to a reference signal (not shown in FIG. 3). Medium), wherein the reference signal and the driving signal SD can have the same waveform. Please refer to Figure 4 together with Figure 3. 4 is a schematic diagram of an embodiment of a partial circuit architecture of the multiplexer circuit 332_1 and the analog-to-digital converter 334_1 corresponding to the column sensor RS1 shown in FIG. For the sake of brevity, FIG. 4 only shows a part of the circuit elements corresponding to the plurality of sensors S _1,1 S S _1,3 located in the column sensor RS1. It should be noted that in some embodiments, part or all of the plurality of multiplexer circuits 332_2 ～ 332_M may also adopt the circuit architecture shown in FIG. 4, and/or a plurality of analog digital converters 334_2-334_M. Some or all of the circuit architectures shown in Figure 4 can also be used.

In the embodiment shown in FIG. 4, the multiplexer circuit 332_1 may include, but is not limited to, a plurality of switches SW0 to SW3, and the analog digital converter 334_1 may include, but is not limited to, a signal amplifier 336_1 and a capacitor. C1, wherein the signal amplifier 336_1 can have an input terminal T _I1 , an input terminal T _{I2 ,} and an output terminal T _OUT . The switch SW0 can selectively couple the input terminal T _I1 to one of the reference signal V _RT and a reference signal V _RD , wherein the reference signal V _RT can have the same/similar waveform as the driving signal SD, and the reference signal V _RD can be implemented by a reference voltage such as a certain voltage or a ground voltage. The switch SW1 can selectively couple the sensor S _1,1 to one of the input terminal T _I2 , the reference signal V _RT and the reference signal V _RD . The switch SW2 can selectively couple the sensor S _1,2 to one of the input terminal T _I2 , the reference signal V _RT and the reference signal V _RD . The switch SW3 can selectively couple the sensor S _1,3 to one of the input terminal T _I2 , the reference signal V _RT and the reference signal V _RD . In addition, the capacitor C1 can be coupled between the input terminal T _I2 and the output terminal T _OUT .

For each sensor, when the sensor is enabled/enabled, a corresponding switch can be coupled between the sensor and the input terminal T _I2 ; when the sensor is not enabled / When enabled, the corresponding switch can be coupled between the sensor and the reference signal V _RT . In the case where the sensor is not enabled, the reference signal V _RT may be similar to the drive signal SD (which may be used to drive a control line coupled to the enabled sensor adjacent to the sensor) the same waveform as /, therefore, the reference signal V _RT is not coupled to the enabling of the sensor reduces signal interference between adjacent sensors with the sensor.

In order to facilitate the understanding of the operation details of the plurality of switches SW0 to SW3 shown in FIG. 4, the following operation is performed by the control circuit 320 shown in FIG. 3 in accordance with a driving sequence to drive the N control lines CL ₁ to CL _N in turn. For example, the control lines driven by the driving cycles in the plurality of driving cycles may be "CL ₁ and CL ₂ , CL ₂ and CL ₃ , ..., CL _N-1 and CL _N , CL _{N-, respectively. 1} and CL _N ". However, this is for convenience of explanation only and is not intended to be a limitation of the present invention. Please refer to Figure 5 and Figure 6 together with Figure 3. FIG. 5 is a schematic diagram showing an embodiment in which the multiplexer circuit 332_1 and the analog-to-digital converter 334_1 shown in FIG. 4 operate in a first driving cycle, and FIG. 6 shows a fourth diagram. A schematic diagram of an embodiment of the multiplexer circuit 332_1 and the analog-to-digital converter 334_1 operating in a second drive cycle, wherein the second drive cycle is adjacent (eg, continued) to the first drive cycle.

First, in the first driving cycle, the control circuit 320 can generate the driving signal SD to the plurality of control lines CL ₁ and CL ₂ to enable the plurality of sensors S _1,1 and S _{1,2 to} detect the touch event TE. . The switch SW0 can couple the input terminal T _I1 to the reference signal V _RD so that the analog digital converter 334_1 can perform a signal conversion operation (or a signal integration operation). The switch SW1 can couple the sensor S _1,1 to the input terminal T _I2 to transmit the sensing result SR _{1,1 of the} sensor S _1,1 to the analog digit converter 334_1. Similarly, the switch SW2 can couple the sensor S _1,2 to the input terminal T _I2 to transmit the sensing result SR _{1,2 of the} sensor S _1,2 to the analog digital converter 334_1. In order to reduce noise interference, the switch SW3 can couple the sensors S _{1, 3} to the reference signal V _RT . The analog digital converter 334_1 can collect the sensing result SR _1,1 and the sensing result SR _1,2 and accordingly generate the sensing output SO ₁ .

In the second driving cycle, the control circuit 320 can generate the driving signal SD to the plurality of control lines CL ₂ and CL ₃ so that the plurality of sensors S _{1, 2} and S _{1, 3} detect the touch event TE. The switch SW2 can couple the sensor S _1,2 to the input terminal T _I2 to transmit the sensing result SR _{1,2 of the} sensor S _1,2 to the analog digital converter 334_1. The switch SW3 can couple the sensors S _1,3 to the input terminal T _I2 to transmit the sensing results SR _{1,3 of the} sensors S _1,3 to the analog digital converter 334_1. Similarly, the switch SW1 can couple the sensor S _1,1 to the reference signal V _RT to reduce noise interference. The analog digital converter 334_1 can collect the sensing result SR _1,2 and the sensing result SR _1,3 and accordingly generate the sensing output SO ₁ .

Based on the above operation, the control circuit 320 equivalently drives 2N control lines among the drive sequences. Therefore, the touch sensing array 110 can be regarded as a touch sensing array having a plurality of sensors arranged in M columns and 2N rows, wherein one sensing output generated according to each driving cycle can come from Sensing results of two sensors. Therefore, in the case that the control circuit 320 drives the P control lines at the same time to enable the N rows of sensors in turn, the touch sensing array 110 can be expanded to be arranged in M columns and (P×N). A touch sensing array of a plurality of sensors, wherein one of the sensing outputs generated from each of the driving cycles may be derived from the sensing results of the P sensors. Therefore, the signal-to-noise ratio of the touch panel 300 can be greatly improved.

Please note that the above description is for illustrative purposes only and is not intended to be a limitation of the invention. In a design change, at least one of the plurality of multiplexer circuits 332_1 ～ 332_M shown in FIG. 3 can be implemented by a circuit architecture different from that shown in FIG. In another design variation, at least one of the plurality of analog-to-digital converters 334_1-334_M shown in FIG. 3 can be implemented by a circuit architecture different from that shown in FIG. In yet another design variation, the number of sensing lines among the respective sets of sensing lines shown in FIG. 3 is not limited to N. For example, at least one of the complex array sensing lines {SL ₁ } to {SL _M } shown in FIG. ₁ can be implemented by a single sensing line.

In summary, the touch panel sensing mechanism provided by the present invention can simultaneously drive/enable multiple rows of sensors in the touch sensing array in a single driving cycle, thereby equivalently expanding the touch sensing array. Size and increase touch sensing range. Therefore, the touch panel using the touch panel sensing mechanism provided by the present invention can maintain a good signal to noise ratio under various control situations. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100, 300‧‧‧ touch panel
110‧‧‧Touch Sensing Array
120, 320‧‧‧ control circuit
130, 330‧‧‧Sensor circuit
210-240‧‧‧ steps
332‧‧‧Selection circuit
332_1~332_M, MUX‧‧‧ multiplexer circuit
334‧‧‧Processing Circuit
334_1~334_M, ADC‧‧‧ analog digital converter
336_1‧‧‧Signal Amplifier
SW0~SW3‧‧‧ switch
C1‧‧‧ capacitor
T_I1, T_I2‧‧‧ input
T_OUT‧‧‧ output
TE‧‧‧ touch event
CL₁~CL_N‧‧‧ control line
S_1,1~S_M,N‧‧‧ sensor
{SR₁}~{SR_M}‧‧‧A set of sensing results
{SL₁}~{SL_M}‧‧‧A set of sensing lines
SO₁~SO_M‧‧‧ sensing output
RS1‧‧‧ column sensor
SD‧‧‧ drive signal
V_RT, V_RD‧‧‧ reference signal

FIG. 1 is a schematic view of an embodiment of a touch panel of the present invention. FIG. 2 is a flow chart of an embodiment of a sensing method of the touch panel of the present invention. FIG. 3 is a schematic diagram showing an example of the implementation of the touch panel shown in FIG. 1. Fig. 4 is a view showing an embodiment of a partial circuit architecture of a multiplexer circuit and an analog digital converter corresponding to one of the columns of the sensor shown in Fig. 3. FIG. 5 is a schematic diagram showing an embodiment in which the multiplexer circuit and the analog-to-digital converter shown in FIG. 4 operate in a first driving cycle. FIG. 6 is a schematic diagram showing an embodiment in which the multiplexer circuit and the analog-to-digital converter shown in FIG. 4 operate in a second driving period.

Claims (10)

A touch panel sensing method includes a touch sensing array, N control lines, and M sets of sensing lines, wherein the touch sensing array includes a plurality of sensings arranged in M columns and N rows The N control lines are respectively coupled to the N rows of sensors, and the M sets of sensing lines are respectively coupled to the M columns of sensors, and M and N are positive integers greater than 1; the sensing method includes the following steps: Alternatingly driving the N control lines to enable the N rows of sensors to detect a touch event on the touch panel, wherein one P control line is driven to make each column sensor There will be P sensors enabled at the same time, and P is a positive integer greater than 1 and less than N; and for each column of sensors: a set of sensing lines coupled via the column sensor, receiving The P sensors that are enabled at the same time detect the P sensing results generated by the touch event; and generate a sensing output corresponding to the column sensor according to the P sensing results; Each set of sensing lines includes N sensing lines respectively coupled to N sensors in a corresponding one of the rows of sensors; The step of receiving, by the set of sensing lines coupled to the column of sensors, the P sensors that are simultaneously enabled to detect the P sensing results generated by the touch event comprises the following steps: The P sense lines coupled to the P sensors are coupled to a processing circuit to receive the P sensed results by using the processing circuit; and the (NP) sensors that are not enabled The coupled (NP) sense lines are separated from the processing circuitry. The sensing method of claim 1, wherein the P control lines are adjacent to each other. The sensing method of claim 1, wherein the N controls are alternately driven The step of dividing the line includes: driving a first control line and (P-1) second control line of the N control lines simultaneously in a first driving cycle; and adjacent to the first driving Driving the (P-1) second control line and the third control line of the N control lines simultaneously in a second driving period of the cycle, wherein the third control line is different from the first control line . The sensing method of claim 1, wherein the step of alternately driving the N control lines comprises the steps of: generating, for each column of sensors: the driving signal to the P sensing of the enabling. And the (NP) sensing lines coupled to the (NP) sensors that are not enabled are coupled to a reference signal, wherein the reference signal and the driving The signals have the same waveform. The sensing method of claim 1, wherein the step of generating the sensing output corresponding to the column sensor according to the P sensing results comprises the following steps: the P sensing results are Plus, and accordingly generate the sensed output. A touch panel includes: a touch sensing array comprising a plurality of sensors arranged in M rows and N rows for detecting a touch event on the touch panel, wherein M and N are both a positive integer greater than 1; N control lines respectively coupled to the N rows of sensors; M sets of sensing lines respectively coupled to the M columns of sensors, wherein each set of sensing lines includes N sensing lines, the N The sensing lines are respectively coupled to the N sensors in the corresponding one of the columns of sensors; a control circuit coupled to the N control lines for alternately driving the N control lines to enable the N rows of sensors to detect the touch event in turn, wherein the control circuit simultaneously drives the P a control line such that P sensors in each column of sensors are simultaneously enabled, and P is a positive integer greater than 1 and less than N; and a sensing circuit coupled to the M sets of sensing lines The sensing circuit is coupled to the one set of sensing lines via the column sensor, and the P sensors that are simultaneously enabled are detected by the touch sensor to detect the touch event. P sensing results, and generating a sensing output corresponding to the column sensor according to the P sensing results; the sensing circuit includes: a processing circuit, configured to receive the P sensing results to generate The sensing output is coupled to the M-series sensing line and the processing circuit, wherein the selecting circuit couples the P sensing lines to which the P sensors are coupled Connected to the processing circuit to transmit the P sensed results to the processing circuit, and will not enable (NP) sense The (N-P) sense line coupled to the detector is separated from the processing circuit. The touch panel of claim 6, wherein the P control lines are adjacent to each other. The touch panel of claim 6, wherein in a first driving cycle, the control circuit simultaneously drives a first control line and (P-1) of the N control lines. a second control line; in a second driving period adjacent to the first driving period, the control circuit simultaneously drives the (P-1) second control line and a third control among the N control lines a line; the third control line is different from the first control line. The touch panel of claim 6, wherein the control circuit generates a drive The P signal control line to which the P sensors are coupled, and the selection circuit is the (NP) sense coupled to the (NP) sensors that are not enabled The test line is coupled to a reference signal; the reference signal has the same waveform as the drive signal. The touch panel of claim 6, wherein the sensing circuit adds the P sensing results and generates the sensing output accordingly.