TW201545034A - Touch apparatus, touch controller thereof and noise detection method - Google Patents

Abstract

A noise detection method including the following steps is provided. During different time periods, plural sets of driving signals are respectively transmitted to driving lines of the touch panel to drive sensing lines of the touch panel to generate plural sets of sensing signals. The plural sets of sensing signals are respectively received and calculated to obtain plural sets of summation signals. One set of summation signals includes first summation signals, and another set of summation signals includes second summation signals. A part or a whole of the first summation signals is replaced by the second summation signals. A signal value of a combination of the first and the second summation signals is calculated to obtain a summation thereof. The summation of the signal value of the combination is smaller than a summation of a signal value of the first summation signals which are not replaced.

Description

Touch device, touch controller and noise detection method

The present invention relates to an electronic device and a controller thereof, and more particularly to a touch device and a touch controller thereof.

There are many ways to detect noise in a communication system. Generally speaking, it can be divided into two methods: pre-assessment and post-event statistics. The so-called pre-evaluation of noise is to evaluate whether there is noise in the signal channel that is transmitted before the signal is transmitted. However, it takes extra time to pre-evaluate the presence of noise, resulting in a decrease in signal transmission rate. In the touch device, pre-evaluation of the presence of noise may cause the touch controller to report a decrease in rate. The so-called post-mortem statistics method is to analyze whether the received data has noise after receiving the transmitted data. However, in the method of post-mortem statistics, the touch controller should process the data fast enough, and must be faster than the data transmission end, so that the touch controller rate is not reduced. In addition, the use of post-mortem statistics to detect noise, but also consider the problem of false positive rate. If the false positive rate is low, the statistical method is better. But this means that the touch controller is used. Circuits that process data can be more complicated. Or, it will cause the touch controller to report a drop rate.

On the other hand, touch devices that currently use multiple scans generally take an inverse matrix operation to obtain the answer of the raw data. This approach simply spreads the noise evenly among the answers and does not actually eliminate system noise. Therefore, if there is a large amount of noise signal, this method can only spread the noise signal evenly among the various solutions, and can not eliminate noise more efficiently. In other words, the conventional multi-scan touch system generally only uses inverse matrix operations to obtain the original data solution, no noise detection capability, and no noise correction capability.

The invention provides a touch device and a touch controller thereof, which can quickly estimate the noise signal and optimize the estimation result.

A touch controller of the present invention is used to drive a touch panel. The touch panel includes a plurality of driving lines and a plurality of sensing lines. The sensing line is electrically connected to the driving line. The touch controller includes a driving circuit and a control circuit. The driving circuit transmits a plurality of first driving signals to the driving lines in a first time interval to drive the sensing lines to generate a plurality of first sensing signals. The driving circuit transmits a plurality of second driving signals to the driving lines in a second time interval to drive the sensing lines to generate a plurality of second sensing signals. The control circuit is configured to receive the first sensing signal in the first time interval, and calculate the first sensing signal to obtain the plurality of first sum signals. Control circuit in the second time In the interval, the second sensing signal is received to calculate the second sensing signal to obtain at least one second sum signal. The control circuit is configured to replace a part or all of the first sum signal with at least one second sum signal, so that the sum of the signal values of the combined second at least one second sum signal and the first sum signal is smaller than The sum of the signal values of the first sum signal before the reorganization.

A touch device of the present invention includes a touch panel and a touch controller. The touch panel includes a plurality of driving lines and a plurality of sensing lines. The sensing line is electrically connected to the driving line. The touch controller is used to drive the touch panel. The touch controller includes a driving circuit and a control circuit. The driving circuit transmits a plurality of first driving signals to the driving lines in a first time interval to drive the sensing lines to generate a plurality of first sensing signals. The driving circuit transmits a plurality of second driving signals to the driving lines in a second time interval to drive the sensing lines to generate a plurality of second sensing signals. The control circuit is configured to receive the first sensing signal in the first time interval, and calculate the first sensing signal to obtain the plurality of first sum signals. The control circuit is configured to receive the second sensing signal in the second time interval, and calculate the second sensing signal to obtain the at least one second sum signal. The control circuit is configured to replace a part or all of the first sum signal with at least one second sum signal, so that the sum of the signal values of the combined second at least one second sum signal and the first sum signal is smaller than The sum of the signal values of the first sum signal before the reorganization.

A method for detecting noise in a touch panel of the present invention. The touch panel includes a plurality of driving lines and a plurality of sensing lines. The sensing line is electrically connected to the driving line. The noise detection method includes the following steps. Passing multiple sets of drives in multiple different time intervals The signal is driven to the drive line to drive the sensing line to generate multiple sets of sensing signals. In different time intervals, multiple sets of sensing signals are respectively received, and multiple sets of sensing signals are calculated to obtain multiple sets of summing signals. Here, one of the plurality of sets of sum signals includes a plurality of first sum signals, and the other of the plurality of sets of sum signals includes at least one second sum signal. The at least one second sum signal is used to replace a part or all of the first sum signal to obtain a combination of the recombined at least one second sum signal and the first sum signal. Calculating a signal value of the combined second at least a second sum signal and the first sum signal to obtain a sum of the signal values. Here, the sum of the signal values of the combined second at least one second sum signal and the first sum signal is smaller than the sum of the signal values of the first sum signal before recombination.

In an embodiment of the present invention, the sum of the combined signal values of the combined second at least second sum signal and the first sum signal is all combinations of the recombined at least one second sum signal and the first sum signal. The sum of the signal values in the smallest.

In an embodiment of the invention, the control circuit is configured to select one or more second sum signals from the at least one second sum signal to replace a part of the first sum signal to obtain at least one of the recombined The combination of the two sum signals and the first sum signal.

In an embodiment of the invention, the unsubstituted first sum signal corresponds to a portion of the sensing line. The at least one second sum signal used to replace the first sum signal corresponds to the remaining portion of the sensing line.

In an embodiment of the invention, the unsubstituted first sum signal The sum of the number and the number of at least one second sum signal used to replace the first sum signal is equal to the number of all sense lines.

In an embodiment of the invention, the control circuit is configured to select all of the second sum signals from the at least one second sum signal to replace all the first sum signals to obtain the recombined at least one second sum signal. And a combination of the first sum signal.

In an embodiment of the invention, the at least one second sum signal used to replace the first sum signal corresponds to all of the sensing lines.

In an embodiment of the invention, the number of the at least one second sum signal used to replace the first sum signal is equal to the number of all sensing lines.

In an embodiment of the invention, the number of the unsubstituted first sum signals is greater than, less than, or equal to the number of the at least one second sum signal used to replace the first sum signal.

In an embodiment of the invention, the time length of the first time interval is greater than, less than or equal to the time length of the second time interval.

In an embodiment of the invention, each of the first driving signals has a first polarity pattern and a second polarity pattern. During the first time interval, one of the first polarity pattern and the second polarity pattern of each of the first driving signals is substantially zero. Each of the second driving signals has a first polarity pattern and a second polarity pattern. In the second time interval, the operations of the first polarity pattern and the second polarity pattern of each of the second driving signals are substantially zero.

Based on the above, the touch device and the touch controller thereof are utilized The second sum signal replaces some or all of the first sum signal, and in addition to quickly and correctly estimating the sum of the noise, the estimation result can also be optimized.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧ touch device

110‧‧‧ touch controller

112‧‧‧Drive circuit

113‧‧‧Drive block

114‧‧‧Control circuit

115‧‧‧Control block

117‧‧‧Storage block

120‧‧‧Touch panel

122‧‧‧ objects

302, 304, 306‧‧‧ areas

X1, X2, X3, Xi, Xn‧‧‧ sensing signals

Y1, Y2, Y3, Yj, Ym‧‧‧ drive signals

TX_1, TX_2, TX_3, TX_J, TX_M‧‧‧ drive lines

RX_1, RX_2, RX_3, RX_I, RX_N‧‧‧ sensing lines

D1, D2, D3, Dj, Dm‧‧‧ output amplifier

ADC1, ADC2, ADC3, ADCi, ADCn‧‧‧ analog-to-digital converters

Vnlcm‧‧‧ display module noise

Vncg‧‧‧Charging noise

Capacitance values of C11, C12, C13, C14, C21, C22, C23, C24, C31, C32, C33, C34, C41, C42, C43, C44‧‧

Chg‧‧‧ Capacitance change

TS1, TS2, TSi, TSn‧‧‧ subinterval

RX Sum_1, RX Sum_2, RX Sum_i, RX Sum_n‧‧‧sum signal

TX Sum_1, TX Sum_2, TX Sum_J, TX Sum_M‧‧‧ drive signal Sum

Steps for S600, S610, S620‧‧‧ noise detection methods

FIG. 1 is a schematic diagram of a touch device according to an exemplary embodiment of the invention.

2 is a schematic partial view of the touch panel of FIG. 1 .

FIG. 3 is a schematic diagram showing the distribution of data of the touch panel of FIG. 1 when it is driven.

FIG. 4 is a diagram showing waveforms of driving signals according to an exemplary embodiment of the present invention.

FIG. 5 is a diagram showing waveforms of driving signals according to another exemplary embodiment of the present invention.

FIG. 6 illustrates a method for optimizing noise detection and results according to an embodiment of the invention.

FIG. 1 is a schematic diagram of a touch device according to an exemplary embodiment of the invention. Referring to FIG. 1 , the touch device 100 of the embodiment includes a touch controller 110 and a touch panel 120 . The touch panel 120 includes a plurality of driving lines TX_1 to TX_M and a plurality of sensing lines RX_1 to RX_N for sensing a touch gesture on the touch panel 120. The touch controller 110 includes a driving circuit 112 and a control circuit 114. Where M and N are positive integers greater than one. The driving circuit 112 is configured to transmit a plurality of driving signals Y1 to Ym to the driving line TX_1 within a time period of a specific time length. To TX_M, a plurality of sensing signals X1 to Xn are generated by driving the sensing lines RX_1 to RX_N. Where m and n are positive integers greater than one. The control circuit 114 is configured to receive the sensing signals X1 to Xn to calculate the signal values of the sensing signals X1 to Xn to obtain a plurality of sum signals RX Sum_1 to RX Sum_n (as indicated by the formula (1)). Where i is a positive integer greater than or equal to 1, less than or equal to n. For example, in a time interval of a certain length of time, the control circuit 114 receives, for example, the sensing signal X1 transmitted by the sensing line RX_1, and calculates the sum of the signal values of the sensing signal X1 to obtain the sensing line RX_1 for a specific length of time. The sum signal RX Sum_1 within the time interval. In this embodiment, the manners of the summation signals RX Sum_2 to RX Sum_n of the remaining sensing lines RX2 to RX_N in the same time interval can be deduced by analogy, and are not described herein again.

In the present exemplary embodiment, the drive circuit 112 includes a drive block 113 and output amplifiers D1 through Dm disposed at its output. The output amplifiers D1 to Dm are for increasing the driving ability of the driving signals Y1 to Ym, and transmitting the driving signals Y1 to Ym to the driving lines TX_1 to TX_M. In the present exemplary embodiment, control circuit 114 includes control block 115 and analog digital converters ADC1 through ADCn disposed at its inputs. The analog-to-digital converters ADC1 to ADCn are used to receive the analog signals X1 to Xn of the analog form transmitted by the sensing lines RX_1 to RX_N, and convert the analog signals X1 to Xn of the analog form into the sensing signals X1 to Xn in the form of digits. Thereafter, it is passed to control block 115 for processing. The control block 115 is configured to calculate the sum of the signal values of the sensing signals X1 to Xn, respectively, to obtain the sum signals RX Sum_1 to RX Sum_n of the sensing lines RX_1 to RX_N in a time interval of a certain length of time. In the present exemplary embodiment, the control block 115 includes a storage block 117. It is used for storing the sensing signals X1 to Xn in digital form and storing the sum signals RX Sum_1 to RX Sum_n obtained by the signal processing.

2 is a schematic partial view of the touch panel of FIG. 1 . Please refer to FIG. 1 and FIG. 2 . FIG. 2 only illustrates four driving lines TX_1 to TX_4 and four sensing lines RX_1 to RX_4 for illustration. The number is not used to limit the present invention. In the present exemplary embodiment, the touch panel 120 is, for example, a capacitive touch panel, and uses mutual capacitance principles to determine touch information of the touch gesture, such as the occurrence of the touch gesture on the touch panel 120. position. As shown in FIG. 2, the sensing lines RX_1 to RX_4 are used to sense the signal value on the touch panel 120. The source may have two sources: one is, for example, the driving gestures TX_1 to TX_4 and the sensing line RX_1 due to the touch gesture. The capacitance value generated by the touch point between RX_4 and its noise, the sum of the two is located at each touch point, and is represented by capacitance values C11 to C44, respectively. Second, for example, the touch panel 120 is externally received. Other noise signals generated by the influence include display liquid crystal module noise Vnlcm and charge noise Vncg. The display module noise Vnlcm is caused by noise generated when the display module (not shown) integrated with the touch panel 120 is driven. The charging noise Vncg is caused by an object 122 (such as a finger or a stylus) that is in contact with the touch panel 120 and a grounding end forming a charging and discharging path, thereby generating a capacitance change Chg to bring noise. The display module noise Vnlcm and the charging noise Vncg are all noise signals generated by external influences, which may cause the touch controller 110 to misjudge the occurrence position of the touch gesture on the touch panel 120. Therefore, it is necessary to quickly and correctly estimate the noise generated by the touch panel 120 in the touch device 100 due to external influences.

FIG. 3 is a schematic diagram showing the distribution of data of the touch panel 120 of FIG. 1 when it is driven. Referring to FIG. 3, the horizontal axis represents a time interval, and the timing thereof is increased from left to right. The vertical axis represents the driving direction of the touch panel 120, and is sequentially scanned from the top to the bottom by the driving line TX_1 to the driving line TX_M. In the present exemplary embodiment, the time interval includes a plurality of time slots TS1 to TSn. In the area 306, the information Cji+Nji corresponding to the intersection of the driving lines TX_1 to TX_M and the sensing lines RX_1 to RX_N on the touch panel 120 of FIG. 1 represents the capacitance value Cji generated by the touch gesture and the touch panel 120 is externally received. The sum of the noise Nji generated by the influence, where j is a positive integer from 1 to M, i is a positive integer from 1 to n, and M, n are positive integers greater than one. The noise Nji includes, for example, a display module noise Vnlcm and a charging noise Vncg. In the area 304, the sum signals RX Sum_1 to RX Sum_n indicated by the positions of the sensing lines RX_1 to RX_N of FIG. 1 represent that the control block 115 calculates the signal values of the sensing signals X1 to Xn in this time interval. Sum. That is to say, the sum signal RX Sum_i represents the sum of the data obtained by the sensing line RX_I from the respective driving lines TX_1 to TX_M in the sub-interval TSi of this time interval. Where I is a positive integer from 1 to N. For example, the sum signal RX Sum_1 represents the sum of C11+N11 to CM1+NM1 in the subinterval TS1 of the time interval. The sum signal RX Sum_1 to RX Sum_n can be expressed by the following formula:

Among them, RX Sum_i represents the sum signal, Cji represents the capacitance value generated by the touch gesture, and Nji represents the noise generated by the touch panel 120 by the external influence. its j is a positive integer from 1 to M, i is a positive integer from 1 to n, and M and n are positive integers greater than one.

In the exemplary embodiment, each of the driving signals Y1 to Ym has a first polarity pattern and a second polarity pattern. During this time interval, the operations of the first polarity pattern and the second polarity pattern of each of the driving signals Y1 to Ym are substantially zero. In this example, the operations of the first polarity pattern and the second polarity pattern of the respective driving signals Y1 to Ym are, for example, summed. That is, in the area 302, the sums TX Sum_1 to TX Sum_M of the respective driving signals indicated by the positions of the driving lines TX_1 to TX_M of FIG. 1 are respectively zero, indicating that the driving signals Y1 to Ym are in this time interval. The sum of the first polarity pattern and the second polarity pattern is substantially zero.

For example, taking four driving signals Y1 to Y4 as an example, in the exemplary embodiment, in the time interval including two sub-intervals TS1 and TS2, the polarity distribution states of the driving signals Y1 to Y4 are as shown in Table 1 below. :

In the above Table 1, "1" indicates that the drive signals Y1 to Y4 have the first polarity pattern in the corresponding sub-interval, and "-1" indicates that the drive signals Y1 to Y4 have the second polarity pattern in the corresponding sub-interval. Therefore, in the column of the drive line TX_1, after the passage of the time interval including the two sub-intervals TS1, TS2, the sum of the first polarity pattern and the second polarity pattern of the drive signal Y1 is substantially zero. Drive line TX_2 to drive The polarity distribution state of the driving signals Y2 to Y4 of the line TX_4 can be deduced by analogy.

Taking the driving signals Y1 to Y4 in the form of a sine wave as an example, FIG. 4 illustrates a waveform of a driving signal according to an exemplary embodiment of the present invention, including a driving signal of the first polarity pattern "1" and a second polarity pattern "-1". The driving signal, the sum of the two is essentially zero. Further, the waveform of the driving signal of the present invention is not limited to the form of a sine wave, and may be in the form of a square wave. Taking a driving signal in the form of a square wave as an example, FIG. 5 illustrates a waveform of a driving signal according to another exemplary embodiment of the present invention, including a driving signal of a first polarity pattern "1" and a driving including a second polarity pattern "-1". The signal, the sum of the two is essentially zero. It should be noted that the first polarity pattern and the second polarity pattern of each of the driving signals Y1 to Ym are represented by "1", "-1", square wave, and sine wave for illustrative purposes only, and the present invention is not limited thereto. .

The polarity distribution pattern of each of the driving signals Y1 to Y4 of the present invention is not limited to that shown in Table 1 above. Taking the four driving signals Y1 to Y4 as an example, in the exemplary embodiment, in the time interval including the four sub-intervals TS1 to TS4, the polarity distribution states of the driving signals Y1 to Y4 are as shown in Table 2 below:

In this example, each of the drive signals Y1 to Y4 includes 4 sub-intervals TS1. After the time interval to TS4 elapses, the sum of the first polarity pattern and the second polarity pattern is substantially zero.

The polarity distribution patterns of the respective driving signals Y1 to Y4 of the present invention are not limited to those shown in Tables 1 and 2 above. Table 3 illustrates the polarity distribution states of the driving signals of another exemplary embodiment of the present invention:

In this example, after the driving signals Y1 to Y4 pass through the time interval including the four sub-intervals TS1 to TS4, the sum of the first polarity pattern and the second polarity pattern is substantially zero. Taking the drive line TX_1 as an example, the drive signal Y1 has two polarity patterns in the same subinterval. For example, the drive signal Y1 has two polarity patterns "1" and "-1" in the sub-interval TS1. After the time interval including the four subintervales TS1 to TS4, the sum of the first polarity pattern and the second polarity pattern of the driving signal Y1 is substantially zero, that is, [(-1)+1+1+1]+[1 +(-1)+(-1)+(-1)]=0. The polarity distribution states of the driving signals Y2 to Y4 of the driving lines TX_2 to TX_4 may be analogy. After the passage of the time interval including the four subintervals TS1 to TS4, the sum of the first polarity pattern and the second polarity pattern of the drive signals Y2 to Y4 is also substantially zero.

The polarity distribution patterns of the respective driving signals Y1 to Y4 of the present invention are also not limited to those shown in Tables 1 to 3 above. Table 4 illustrates the polarity distribution states of the driving signals of another exemplary embodiment of the present invention:

In this example, after each of the drive signals Y1 to Y4 passes through the time interval including the four sub-intervals TS1 to TS4, the operations of the first polarity pattern and the second polarity pattern are substantially zero. In this example, the operation of the first polarity pattern and the second polarity pattern of each of the driving signals Y1 to Y4 is, for example, a difference therebetween. Taking the drive line TX_1 as an example, the drive signal Y1 has two polarity patterns in the same subinterval. For example, the drive signal Y1 has two polarity patterns "1" and "-1" in the sub-interval TS1. After the time interval including the four subintervals TS1 to TS4, the first of the driving signals Y1 The operation of the one polarity pattern and the second polarity pattern is substantially zero, that is, [(-1)+1+1+1]-[(-1)+1+1+1]=0. The polarity distribution state of the driving signals Y2 to Y4 of the driving line TX_2 to the driving line TX_4 can be deduced by analogy. After the passage of the time interval including the four subintervals TS1 to TS4, the operations of the first polarity pattern and the second polarity pattern of the drive signals Y2 to Y4 are also substantially zero.

Although the above Tables 1 to 4 are exemplified by only four drive lines, four drive signals, and time intervals including a specific number of subintervals, the present invention is not limited thereto. The polarity distribution state of the M driving lines and the m driving signals in the time interval of a certain length of time and the operation manner and efficiency thereof can be obtained from the descriptions of the embodiments in Tables 1 to 4, and thus sufficient instructions, suggestions and implementation instructions are obtained, so Let me repeat.

Please refer to Figure 1 and Figure 3. In the exemplary embodiment of FIG. 1, the control circuit 114 calculates the sum of the signal values of the sensing signals X1 to Xn in the time interval of the specific time length, at least in combination with the driving concept disclosed in the foregoing Tables 1 to 4. The sum signal RX Sum_1 to RX Sum_n can be obtained. Then, the control circuit 114 recalculates the sum signals RX Sum_1 to RX Sum_n to obtain the sum NF of the sum signals RX Sum_1 to RX Sum_n, that is, NF=RX Sum_1+RX Sum_2+...+RX Sum_(n-1)+RX Sum_n= . The sum NF obtained by the control circuit 114 calculating the sum signals RX Sum_1 to RX Sum_n represents the noise generated by the touch panel 120 from external influences. Therefore, by using the noise detection method provided by the disclosure, the noise generated by the external influence of the touch panel 120 in the touch device 100 can be quickly and correctly estimated. Then, the control circuit 114 passes the sum signals RX Sum_1 to RX Sum_n to the next level circuit (not shown) for appropriate signal processing (for example, inverse matrix operation) to obtain the original data of the touch information that determines the touch gesture ( Raw data).

The noise detection method proposed in the present disclosure can be combined with the concept of signal selection, in addition to quickly and correctly estimating the sum of noise NF, it can also effectively reduce the sum of noise NF. Specifically, the touch controller 110 can repeatedly execute the noise detection method of the present disclosure in different time intervals to obtain multiple sets of sum signals RX Sum_1 to RX Sum_n. Moreover, the touch controller 110 further selects and calculates the sum signals RX Sum_1 to RX Sum_n corresponding to the sensing lines RX_1 to RX_N from the plurality of sets of sum signals to obtain a smaller noise sum NF.

For example, in the first time interval, the touch controller 110 performs the first noise detection method. At this time, the driving circuit 112 respectively transmits a plurality of first driving signals Y11 to Y1m to the driving lines TX_1 to TX_M to drive the sensing lines RX_1 to RX_N to generate a plurality of first sensing signals X11 to X1n. Next, the control circuit 114 receives the first sensing signals X11 to X1n, and calculates the first sensing signals X11 to X1n to obtain a first group of sum signals. The first group sum signal includes, for example, a plurality of first sum signals RX Sum_11 to RX Sum_1n corresponding to the sensing lines RX_1 to RX_N, respectively.

Then, in the second time interval, the touch controller 110 performs a second noise detection method. The driving circuit 112 transmits a plurality of second driving signals Y21 to Y2m to the driving lines TX_1 to TX_M to drive the sensing lines RX_1 to RX_N to generate a plurality of second sensing signals X21 to X2n. Then, the control circuit 114 receives the second sensing signal. The numbers X21 to X2n are calculated, and the second sensing signals X21 to X2n are calculated to obtain a second group of sum signals. The second group sum signal includes, for example, a plurality of second sum signals RX Sum_21 to RX Sum_2n corresponding to the sensing lines RX_1 to RX_N, respectively. In this exemplary embodiment, the length of time of the first time interval may be greater than, less than, or equal to the length of time of the second time interval.

Then, the control circuit 114 selects one or more first sum signals from the first sum signal RX Sum_11 to RX Sum_1n. In the present embodiment, the control circuit 114 selects (n-1) first sum signals RX Sum_12 to RX Sum_1n, for example, corresponding to the sensing lines RX_2 to RX_N. Next, the control circuit 114 selects one or more second sum signals from the second sum signal RX Sum_21 to RX Sum_2n. In this embodiment, the control circuit 114 selects only one second sum signal RX Sum_21 corresponding to the sensing line RX_1, for example, to replace the first sum signal RX Sum_11. The sum of the signal values of the selected first sum signals RX Sum_12 to RX Sum_1n and the signal values of the selected second sum signal RX Sum_21 is less than that obtained by the control circuit 114 in the first time interval. The sum of the signal values of the first sum signal RX Sum_11 to RX Sum_1n is NF1.

In other words, in the present exemplary embodiment, the control circuit 114 selects and calculates a combination of the second sum signal RX Sum_21 and the first sum signal RX Sum_12 to RX Sum_1n from the plurality of sets of sum signals corresponding to the sensing lines RX_1 to RX_N. A smaller sum of noise NF2 is obtained compared to the noise sum NF1. In the present exemplary embodiment, the control circuit 114 can be used to calculate the signal value of the selected first sum signal RX Sum_12 to RX Sum_1n and the selected second sum signal RX Sum_21. The value of the number to get the sum of the two NF2. The control circuit 114 can also be used to calculate the signal values of the first sum signals RX Sum_11 to RX Sum_1n obtained in the first time interval to obtain the sum NF1 thereof. In other embodiments. The calculation of the sum of the signal values NF1, NF2 can also be calculated by the next stage circuit of the control circuit 114.

In the present exemplary embodiment, the selected first sum signals RX Sum_12 to RX Sum_1n correspond to at least a part of the sensing lines RX_2 to RX_n, and the selected second sum signal RX Sum_21 corresponds to the remaining part of the sensing line RX_1. In addition, in the present exemplary embodiment, the number of selected first sum signals RX Sum_12 to RX Sum_1n is (n-1), and the number of selected second sum signals RX Sum_21 is one, and the number of the two is The sum is equal to the sum n of the total number of sense lines RX_1 to RX_n.

In the present exemplary embodiment, the control circuit 114 selects the first sum signal or the second sum signal mode, for example, a signal value and a second sum of the first sum signal of the same sensing line of at least some of the sensing lines RX_1 to RX_N. The signal value of the signal, and choose the smaller of the two. Taking the sensing line RX_1 as an example, the control circuit 114 compares the signal value of the first sum signal RX Sum_11 with the signal value of the second sum signal RX Sum_21. In this example, the control circuit 114 selects, for example, a second sum signal RX Sum_21 having a smaller signal value to replace the first sum signal RX Sum_11 having a larger signal value to obtain a smaller sum of noise NF2.

In the present exemplary embodiment, the control circuit 114 selects only one second sum signal from the plurality of second sum signals RX Sum_21 to RX Sum_2n, but the number is not used to limit the present invention. In other embodiments, the control circuit 114 can select A portion of the second sum signal, or a total number of second sum signals, is substituted for some or all of the first sum signal to obtain a smaller sum of noise NF2. That is, according to different implementation examples, the number of first sum signals selected by the control circuit 114 may be greater than, less than, or equal to the number of selected second sum signals. In the present exemplary embodiment, the number of first sum signals selected by the control circuit 114 is greater than the number of selected second sum signals, but the invention is not limited thereto.

In the exemplary embodiment, when the second noise detection method is executed, the touch controller 110 completely obtains all the second sum signals RX Sum_21 to RX Sum_2n, indicating the length of time in the first time interval of this example. It is equal to the length of time of the second time interval, but the invention is not limited thereto. In other embodiments, according to actual application requirements, the touch controller 110 does not necessarily have to completely acquire all the second sum signals RX Sum_21 to RX Sum_2n when performing the second noise detection method to accelerate the noise detection. The method of measurement is carried out. In other words, the length of time of the first time interval of this example is greater than the length of time of the second time interval. For example, referring to FIG. 3, when the touch controller 110 executes the first noise detection method in the first time interval, the first time interval includes, for example, the length of time of the n sub-intervals TS1 to TSn for control. Circuit 114 takes n first sum signals RX Sum_11 through RX Sum_1n. Then, when the touch controller 110 performs the second noise detection method in the second time interval, the second time interval includes, for example, a length of time of the number of sub-intervals TS1 to TSi that are less than n. In this example, the control circuit 114 can obtain the i second sum signals RX Sum_21 to RX Sum_2i, and from the i second sum signals RX Sum_21 to RX Sum_2i The second sum signal RX Sum_21 with a smaller signal value is selected to replace the first sum signal RX Sum_11 with a larger signal value to obtain a smaller sum of noise NF2. In an embodiment, the second time interval may also include only the length of time of one sub-interval TS1. In this example, after obtaining the second sum signal RX Sum_21, the control circuit 114 can compare the sizes of the second sum signal RX Sum_21 and the first sum signal RX Sum_11. If the second sum signal RX Sum_21 is small, the first sum signal RX Sum_11 with a larger signal value is replaced to obtain a smaller sum of noise NF2.

In the present exemplary embodiment, the sum of the signal values NF2 is smaller than the sum NF1 of the signal values by the selection of the control circuit 114, but the present invention is not limited thereto. In other embodiments, the selection of the control circuit 114 may also be such that the sum of the signal values of the selected first sum signal and the selected second sum signal signal value NF2 is obtained in the first time interval. The sum of the first sum signal RX Sum_11 to RX Sum_1n and the possible combination of the second sum signals RX Sum_21 to RX Sum_2n obtained in the second time interval is the smallest. That is, the sum of the signal value of the selected first sum signal and the signal value of the selected second sum signal is an optional at least part of the signal value of the first sum signal and optionally at least a portion of the second sum signal The smallest of the sum of the signal values.

In the present exemplary embodiment, in order to quickly and correctly estimate the noise generated by the external influence of the touch panel 120 in the touch device 100, that is, the sum of the estimated signal values NF1 or NF2, the first driving signals Y11 to Y1m and Each of the second driving signals Y21 to Y2m has a first polarity pattern and a second polarity pattern, respectively. a first polarity pattern and a second polarity of each of the first driving signals Y11 to Y1m in the first time interval The operation of the pattern is essentially zero. In the second time interval, the operations of the first polarity pattern and the second polarity pattern of each of the second driving signals Y21 to Y2m are substantially zero.

The following describes the noise detection method and the concept of signal selection proposed by the present disclosure by taking FIG. 1 and FIG. 2 as examples.

For example, the driving circuit 112 drives the sensing lines RX_1 to RX_4 to generate a plurality of first sensing signals X11 to X14 in the first time interval. The driving circuit 114 calculates the first sensing signals X11 to X14 in the first time interval to obtain a plurality of first sum signals A, B, C, and D corresponding to the sensing lines RX_1 to RX_4, respectively. The sum of the signal values of the first sum signals A, B, C, and D, NF3, that is, NF3=A+B+C+D, is representative of the touch controller 110 after performing the first noise detection method. The noise value obtained. Next, the driving circuit 112 drives the sensing lines RX_1 to RX_4 to generate a plurality of second sensing signals X21 to X24 in the second time interval. The driving circuit 114 calculates the second sensing signals X21 to X24 in the second time interval to obtain a plurality of second sum signals A', B', C', D' corresponding to the sensing lines RX_1 to RX_4, respectively. The sum of the signal values of the second sum signal A', B', C', D' NF4, that is, NF4=A'+B'+C'+D', represents that the touch controller 110 is performing the second noise. The estimated noise value after the detection method.

In the present exemplary embodiment, the control circuit 114 replaces some or all of the first sum signals A, B, C, and D with at least one second sum signal A', B', C', D' to The sum of the signal values NF5 of the combined second signal sum A', B', C', D' and the first sum signal A, B, C, D is smaller than the signal of the first sum signal before the recombination The sum of the values is NF3.

In an exemplary embodiment, the control circuit 114 may select one of the second sum signals A', B', C', D' to replace the corresponding first sum of the first sum signals A, B, C, and D. Signal. For example, the control circuit 114 may select the second sum signal A' to replace the first sum signal A to obtain a combination of the recombined first sum signal B, C, D and the second sum signal A' and its signal value. The sum of NF5. The sum of the signal values NF5 is smaller than the sum NF3 of the signal values of the first sum signal before the recombination.

In another exemplary embodiment, the control circuit 114 may select any two of the second sum signals A', B', C', D' to replace the corresponding two of the first sum signals A, B, C, and D. The first sum signal. For example, the control circuit 114 may select the second sum signal A', B' to replace the first sum signal A, B to obtain the recombined first sum signal C, D and the second sum signal A', B' The combination of the sum of its signal values and NF5. Alternatively, the control circuit 114 may select the second sum signal A', C' to replace the first sum signal A, C to obtain the recombined first sum signal B, D and the second sum signal A', C' The sum of the combination and its signal value NF5. The sum of the signal values NF5 is smaller than the sum NF3 of the signal values of the first sum signal before the recombination. In other words, in this embodiment, the second sum signal of the first sum signal used for replacement may be adjacent or not adjacent.

In another exemplary embodiment, the control circuit 114 may select any three of the second sum signals A', B', C', D' to replace the corresponding three of the first sum signals A, B, C, and D. The first sum signal. For example, control circuit 114 may select second sum signal A', B', C' in place of first sum signal A, B, C to obtain The combination of the first sum signal D and the second sum signal A', B', C' after the recombination and the sum of the signal values NF5. Alternatively, the control circuit 114 may select the second sum signal A', B', D' to replace the first sum signal A, B, D to obtain the recombined first sum signal D and the second sum signal A', The combination of B' and D' and the sum of their signal values NF5. The sum of the signal values NF5 is smaller than the sum NF3 of the signal values of the first sum signal before the recombination. In other words, in this embodiment, the second sum signal of the first sum signal used for replacement may be completely adjacent or non-adjacent, partially adjacent or not adjacent.

In another exemplary embodiment, control circuit 114 may select all of the second sum signals A', B', C', D' to replace all of the first sum signals A, B, C, D. In this example, the combined first sum signal and the second sum signal are A', B', C', D' and the sum of their signal values is NF4. The signal value of the second sum signal A', B', C', D' obtained by the touch controller 110 after performing the second noise detecting method is smaller than the first sum signal A, B, C, D Signal value. Therefore, the second sum signals A', B', C', D' are all used to replace the first sum signal A, B, C, D to obtain a brand new signal combination.

In an exemplary embodiment in which the control circuit 114 selects any one, two, or three of the second sum signals A', B', C', D' to replace the first sum signal A, B, C, D, The control controller 110 does not need to completely perform the noise detection method, that is, the time length of the first time interval is greater than the time length of the second time interval.

In addition, in the present exemplary embodiment, the principle that the control circuit 114 selects the second sum signal A', B', C', D' to replace the first sum signal A, B, C, D, for example, may also be after reorganization The combination of the second sum signal and the first sum signal The sum of the values is the sum of the signal values among all combinations of the second sum signal and the first sum signal after the reorganization. Taking Figure 2 as an example, there may be 16 combinations of the combined second sum signal and the first sum signal, including A', B', C', D' and A, B, C, and D. . After the two noise detections, the combined second sum signal and the first sum signal are, for example, A', B, C, and D, and the sum of the signal values NF5 is the signal value of all 16 combinations. The sum of the smallest.

In an exemplary embodiment of the present invention, the manner of finding various combinations of the second sum signal and the first sum signal includes, but is not limited to, Genetic Algorithm, Simulated Annealing, Gradient (Gradient) Descent) and Newton's Method.

Although FIG. 2 is exemplified by only four drive lines and four sense lines, the present invention is not limited thereto. The selection of the noise detection method and the optimization of the results of the M driving lines and the N sensing lines in the time interval of a certain time length can be obtained from the description of the embodiment of FIG. 2, so that sufficient teaching, suggestion and implementation instructions are obtained. No longer.

FIG. 6 illustrates a method for optimizing noise detection and results according to an embodiment of the invention. Referring to FIG. 1 to FIG. 3 , the noise detection and result optimization method of the exemplary embodiment is applicable to at least the touch device 100 of FIG. 1 . The noise detection and result optimization method of the exemplary embodiment includes the following steps. In step S600, a plurality of first driving signals are transmitted to the driving lines in the first time interval to drive the sensing lines to generate a plurality of first sensing signals, and the first sensing signals are received, and the first sensing is calculated. Signal to get multiple first sum signals. In step S610, a plurality of second driving signals are transmitted to the driving line in the second time interval to drive the sensing lines to generate a plurality of second sensing signals. And receiving the second sensing signal, and calculating the second sensing signal to obtain a plurality of second sum signals. In step S620, a part or all of the first sum signal is replaced by a part or all of the second sum signal, so that the signal value of the combined second sum signal and the first sum signal is combined. The sum is less than the sum of the signal values of the first sum signal before reassembly.

In addition, the method for optimizing the noise detection and the result of the embodiment of the present invention can obtain sufficient teaching, suggestion and implementation description from the description of the embodiment of FIG. 1 to FIG. 5, and therefore will not be described again.

In summary, in the exemplary embodiment of the present invention, the touch controller can repeatedly perform the noise detection method in different time intervals to obtain multiple sets of sum signals. The touch controller replaces some or all of the original sum signal with a new sum signal. In addition to quickly and correctly estimating the sum of the noise, the sum of the noise can also be optimized.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ touch device

110‧‧‧ touch controller

112‧‧‧Drive circuit

113‧‧‧Drive block

114‧‧‧Control circuit

115‧‧‧Control block

117‧‧‧Storage block

120‧‧‧Touch panel

X1, X2, X3, Xi, Xn‧‧‧ sensing signals

Y1, Y2, Y3, Yj, Ym‧‧‧ drive signals

TX_1, TX_2, TX_3, TX_J, TX_M‧‧‧ drive lines

RX_1, RX_2, RX_3, RX_I, RX_N‧‧‧ sensing lines

D1, D2, D3, Dj, Dm‧‧‧ output amplifier

ADC1, ADC2, ADC3, ADCi, ADCn‧‧‧ analog-to-digital converters

Claims (24)

A touch controller for driving a touch panel, wherein the touch panel includes a plurality of driving lines and a plurality of sensing lines electrically connected to the driving lines, the touch controller includes: a driving circuit, And transmitting a plurality of first driving signals to the driving lines to drive the sensing lines to generate a plurality of first sensing signals, and in a second time interval, for transmitting in a first time interval a plurality of second driving signals to the driving lines for driving the sensing lines to generate a plurality of second sensing signals; and a control circuit for receiving the first sensing signals during the first time interval Calculating the first sensing signals to obtain a plurality of first sum signals, and in the second time interval, receiving the second sensing signals, and calculating the second sensing signals to obtain at least one a second sum signal, wherein the control circuit is configured to replace a part or all of the first sum signals with the at least one second sum signal to allow the reassembled at least one second sum signal and the One of the first sum signal The sum of the signal value of the signal value less than the sum of the engagement of the plurality of first sum signals before recombination. The touch controller of claim 1, wherein the sum of the combined signal values of the combined second at least one second sum signal and the first sum signals is the at least one second after recombination The sum of the signal values among the sum signal and all combinations of the first sum signals is the smallest. The touch controller of claim 1, wherein the control circuit is configured to select one or more second sum signals from the at least one second sum signal. And replacing a portion of the first sum signal to obtain the combined combination of the at least one second sum signal and the first sum signals. The touch controller of claim 3, wherein the unsubstituted first sum signals correspond to a portion of the sensing lines for replacing the at least one of the first sum signals The two sum signals correspond to the remaining portions of the sensing lines. The touch controller of claim 3, wherein the sum of the number of the first sum signals that are not replaced and the number of the at least one second sum signal used to replace the first sum signals Equal to the number of all the sensing lines. The touch controller of claim 1, wherein the control circuit is configured to select all of the second sum signals from the at least one second sum signal to replace all of the first sum signals to obtain The combination of the at least one second sum signal and the first sum signals after the reorganization. The touch controller of claim 6, wherein the at least one second sum signal used to replace the first sum signals corresponds to all of the sensing lines. The touch controller of claim 6, wherein the number of the at least one second sum signal used to replace the first sum signals is equal to the number of all the sensing lines. The touch controller of claim 1, wherein the number of the first sum signals that are not replaced is greater than, less than, or equal to the at least one second sum signal used to replace the first sum signals. quantity. The touch controller of claim 1, wherein the time length of the first time interval is greater than, less than, or equal to the length of time of the second time interval. The touch controller of claim 1, wherein each of the first driving signals has a first polarity pattern and a second polarity pattern, and in the first time interval, each of the first driving signals One of the first polarity pattern and the second polarity pattern is substantially zero, and each of the second driving signals has the first polarity pattern and the second polarity pattern, and in the second time interval, each of the The operation of the first polarity pattern and the second polarity pattern of the two driving signals is substantially zero. A touch device includes: a touch panel including a plurality of driving lines and a plurality of sensing lines, wherein the sensing lines are electrically connected to the driving lines; and a touch controller for driving the touch panel The touch controller includes a driving circuit for transmitting a plurality of first driving signals to the driving lines in a first time interval to drive the sensing lines to generate a plurality of first sensing signals. And in a second time interval, the plurality of second driving signals are transmitted to the driving lines to drive the sensing lines to generate a plurality of second sensing signals; and a control circuit is in the first time interval. Receiving the first sensing signals, calculating the first sensing signals to obtain a plurality of first sum signals, and receiving the second sensing signals in the second time interval, Calculating the second sensing signals to obtain at least one second sum signal, The control circuit is configured to use the at least one second sum signal to replace a part or all of the first sum signals, so that the reassembled at least one second sum signal and the first sum signals are The sum of the signal values of a combination is less than the sum of the signal values of the first sum signals before the recombination. The touch device of claim 12, wherein the sum of the combined signal values of the combined at least one second sum signal and the first sum signals is the recombined at least one second sum The sum of the signal values among the signals and all combinations of the first sum signals is the smallest. The touch control device of claim 12, wherein the control circuit is configured to select one or more second sum signals from the at least one second sum signal to replace a part of the first sum signals And obtaining the combined combination of the at least one second sum signal and the first sum signals. The touch device of claim 14, wherein the unsubstituted first sum signals correspond to a portion of the sensing lines for replacing the at least one second of the first sum signals The sum signal corresponds to the remaining portions of the sensing lines. The touch device of claim 14, wherein the sum of the number of the first sum signals that are not replaced and the number of the at least one second sum signal used to replace the first sum signals is equal to The total number of these sensing lines. The touch device of claim 12, wherein the control circuit is configured to select all of the second sum signals from the at least one second sum signal to replace all of the first sum signals to obtain a reorganization The at least one second sum The combination of the signal and the first sum signal. The touch device of claim 17, wherein the at least one second sum signal used to replace the first sum signals corresponds to all of the sensing lines. The touch device of claim 17, wherein the number of the at least one second sum signal used to replace the first sum signals is equal to the number of all the sensing lines. The touch device of claim 12, wherein the number of the first sum signals that are not replaced is greater than, less than, or equal to the at least one second sum signal used to replace the first sum signals. Quantity. The touch device of claim 12, wherein the time length of the first time interval is greater than, less than, or equal to the length of time of the second time interval. The touch device of claim 12, wherein each of the first driving signals has a first polarity pattern and a second polarity pattern, and in the first time interval, the first driving signal One of the first polarity pattern and the second polarity pattern is substantially zero, and each of the second driving signals has the first polarity pattern and the second polarity pattern. In the second time interval, each of the second drivers The operation of the first polarity pattern and the second polarity pattern of the signal is substantially zero. A method for detecting a noise of a touch panel, wherein the touch panel includes a plurality of driving lines and a plurality of sensing lines electrically connected to the driving lines, the noise detecting method includes: at different times Within the interval, multiple sets of drive signals are transmitted to the drives a plurality of sets of sensing signals are generated by driving the sensing lines; and the plurality of sets of sensing signals are respectively received in the different time intervals, and the plurality of sets of sensing signals are calculated to obtain a plurality of sets of summing signals, wherein One of the plurality of sets of sum signals includes a plurality of first sum signals, and the other of the plurality of sets of sum signals includes at least one second sum signal; and the at least one second sum signal is used to replace the first sums a part or all of the signal, to obtain a combination of the at least one second sum signal and the first sum signal after the reorganization; and calculating the recombined at least one second sum signal and the first sum The signal value of the combination of the signals to obtain the sum of the signal values, wherein the sum of the combined signal values of the combined at least one second sum signal and the first sum signal is smaller than the first ones before the reorganization The sum of the signal values of the sum signal. The method for detecting a noise according to claim 23, wherein the sum of the combined signal values of the combined at least one second sum signal and the first sum signals is the at least one after the reorganization The sum of the signal values among the two sum signals and all combinations of the first sum signals is the smallest.