WO2018058340A1

WO2018058340A1 - Touch chip and method for touch chip in detecting touched point on touchscreen

Info

Publication number: WO2018058340A1
Application number: PCT/CN2016/100459
Authority: WO
Inventors: 陈小祥
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2016-09-28
Filing date: 2016-09-28
Publication date: 2018-04-05
Also published as: CN106462310B; CN106462310A

Abstract

A touch chip and a method for detecting a touched point on a touchscreen. The method comprises: a touch chip outputs a drive signal to S drive channels of a touchscreen in a current scan cycle (S210), the touchscreen having M drive channels, M being a positive integer, and S being a positive integer less than M; when the touch chip outputs the drive signal to each drive channel of the S drive channels, the touch chip receives a sensing signal outputted by N sensing channels of the touchscreen (S220), N being a positive integer; and the touch chip detects a touched point on the touchscreen on the basis of the sensing signal outputted by the N sensing channels and received by the touch chip when the touch chip outputs the drive signal to the S drive channels (S230). The touch chip and the method for detecting the touched point on the touchscreen effectively reduce the time for detecting the touched point on the touchscreen, thus increasing the report rate of the touchscreen and reducing the power consumption of the touch chip.

Description

Method for detecting touch point of touch screen by touch chip and touch chip

Technical field

The present invention relates to the field of electronic products, and in particular, to a touch chip in an electronic product and a method for detecting a touch point of the touch screen by the touch chip.

Background technique

In the existing electronic products, for a touch screen, such as a capacitive touch screen, the touch chip is required to output one or more signals to each driving line of the touch screen for driving in each scanning period, that is, to drive all the driving lines. Scan and receive signals from the corresponding sensing lines, and then detect touch points on the touch screen according to the amount of signal changes, such as calculating the position of the finger touch on the touch screen.

This method of scanning all the screens requires more scanning time, which affects the reporting rate of the touch screen. At the same time, due to the long scanning time, the chip consumes a large amount of power during the scanning process.

Summary of the invention

The invention provides a touch chip and a method for detecting a touch point of the touch screen, which can effectively shorten the detection time of the touch point of the touch screen, thereby improving the report rate of the touch screen and saving the power consumption of the touch chip.

In a first aspect, the present invention provides a method for detecting a touch point of a touch screen, including: the touch chip outputs a driving signal to the S driving channels of the touch screen during a current scanning period, the touch screen has M driving channels, and M is positive An integer, S is a positive integer smaller than M; when the touch chip outputs a driving signal to each of the S driving channels, the touch chip receives the N sensing channels output of the touch screen Inductive signal, N is a positive integer; the touch chip detects the sensing signal output by the N sensing channels received by the touch chip when the driving chip outputs a driving signal to the S driving channels. Touch points on the touch screen.

In the embodiment of the present invention, the touch chip only needs to output a driving signal to a part of the driving channel of the touch screen, and then receive the sensing signals output by all the sensing channels of the touch screen, and then detect the touch points on the touch screen according to the sensing signals, so that the touch chip does not need to be used. Full-screen scanning of the touch screen can effectively shorten the detection time of the touch point on the touch screen, thereby improving the reporting rate of the touch screen and reducing the power consumption of the touch chip.

In a possible implementation manner, S=M/2, K=N, any two of the S driving channels The drive channels are not adjacent.

In a possible implementation manner, the method further includes: when the touch chip detects that an i-th driving channel of the S driving channels has a touch point at a corresponding position on the touch screen, The touch chip outputs a driving signal to the driving channel adjacent to the ith driving channel of the M driving channels during the current scanning period, where i is a positive integer less than or equal to S; the touch chip And receiving, by the touch chip, a sensing signal output by the N sensing channels when the driving chip outputs a driving signal to the driving channel adjacent to the ith driving channel; the touch chip is configured according to the touch chip When the driving channels adjacent to the driving channels output the driving signals, the sensing signals output by the N sensing channels received by the touch chip detect the touch points on the touch screen.

In the embodiment of the present invention, the touch chip outputs a driving signal only to one of the driving channels of all the driving channels of the touch screen in each scanning period, and when a driving channel of the half of the driving channels is detected, corresponding to the touch screen is detected. When there is a touch point, the driving signal is outputted to the driving channel adjacent to the driving channel, and then the sensing signals outputted by all the sensing channels of the touch screen are obtained when the driving signals of the adjacent driving channels are input, and then the sensing signals are detected according to the sensing signals. Touch the point. In this way, finer detection of touch points on the touch screen can be performed.

In a possible implementation manner, the method further includes: the touch chip outputting a driving signal to the MS driving channels except the S driving channels in the M driving channels in a next scanning period; The sensing chip outputs a sensing signal output by the N sensing channels when the touch chip outputs a driving signal to each of the MS driving channels; the touch chip is according to the touch chip When the driving signals are output to the MS driving channels, the sensing signals output by the N sensing channels received by the touch chip detect touch points on the touch screen.

In the embodiment of the present invention, the touch chip outputs a driving signal to the other half of the driving channels of the touch screen in the next scanning period, and then receives the sensing signals output by all the sensing channels of the touch screen, and detects the touch on the touch screen according to the sensing signals. Point, it can be ensured that the touch point located at the position corresponding to the other half of the driving channel is scanned in the scanning period when the previous period is not detected, thereby reducing the missed detection rate of the touched point, thereby improving the reporting rate. .

In a possible implementation, the method further includes: when the touch chip detects that the jth driving channel of the MS driving channels has a touch point at a corresponding position on the touch screen, The touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel among the M driving channels in the next scanning period, where j is a positive integer less than or equal to MS; the touch The chip receives the driving pass of the touch chip adjacent to the jth driving channel The sensing signal outputted by the N sensing channels when the driving signal is output; when the touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel, the touch chip The sensing signals output by the N sensing channels received by the chip detect touch points on the touch screen.

In the embodiment of the present invention, when it is detected that a driving channel of the other half of the driving channels has a touch point at a corresponding position on the touch screen, the driving signal is output to the driving channel adjacent to the driving channel, and then the driving signals are obtained. The sensing signals output by all the sensing channels of the touch screen when the driving signals are input to the adjacent driving channels, and then the touch points on the touch screen are detected according to the sensing signals. In this way, finer detection of touch points on the touch screen can be performed.

In a second aspect, the present invention provides another method for detecting a touch point of a touch screen, comprising: the touch chip outputting a driving signal to the M driving channels of the touch screen during a current scanning period, where M is a positive integer; when the touch chip When the driving signal is output to each of the M driving channels, the touch chip receives the sensing signals output by the K sensing channels of the touch screen, the touch screen has N sensing channels, and N is a positive integer. K is a positive integer smaller than N; the touch chip outputs an induction signal of the K sensing channels received by the touch chip when the touch chip outputs a driving signal to the M driving channels, A touch point on the touch screen is detected.

In the embodiment of the present invention, the touch chip outputs a driving signal to all driving channels of the touch screen, and then receives only the sensing signals outputted by the sensing channels of the touch screen, and then detects the touch points on the touch screen according to the sensing signals, so that the touch chip does not need to be used. The touch screen performs full-screen scanning, thereby effectively reducing the detection time of the touch points on the touch screen, thereby increasing the reporting rate of the touch screen and reducing the power consumption of the touch chip.

In a possible implementation manner, K=N/2, and any two of the K sensing channels are not adjacent.

In a possible implementation manner, the method further includes: when the touch chip detects that an i-th driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, The touch chip outputs a driving signal to the driving channel adjacent to the i-th driving channel among the i-th driving channel and the M driving channels during the current scanning period, where i is less than or equal to M An integer; when the touch chip receives the driving signal from the driving channel adjacent to the ith driving channel and the ith driving channel, the N sensing channels are Sensing signals of the NK outputs outside the sensing channels; the touch chips are re-driven to the i-th driving channel and the i-th driving channel according to the touch chips When the driving signal is output, the sensing signals output by the N-K sensing channels received by the touch chip detect a touch point on the touch screen.

In the embodiment of the present invention, the touch chip only receives the sensing signal outputted by the sensing channel of the touch screen in each scanning period, and when detecting, according to the sensing signals, a driving channel has a touch point corresponding to the position on the touch screen, The driving channel of the touch screen and its adjacent driving channel output a driving signal, and then receive the sensing signal outputted by the other half of the sensing channel, and then detect the touch point on the touch screen according to the sensing signals. In this way, finer detection of touch points on the touch screen can be performed.

In a possible implementation, the method further includes: the touch chip outputs a driving signal to the M driving channels in a next scanning period; the touch chip receives the touch chip and returns the Each of the M driving channels outputs a driving signal, and the sensing signals output by the NK sensing channels of the N sensing channels except the K sensing channels; the touch chip according to the touch When the chip re-outputs the driving signal to the M driving channels, the sensing signals output by the NK sensing channels received by the touch chip detect touch points on the touch screen.

In a possible implementation manner, the method further includes: when the touch chip detects that a jth driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, The touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel among the jth driving channel and the M driving channels in the next scanning period, where j is less than or equal to MS a positive integer; the sensing of the output of the K sensing channels when the touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel and the jth driving channel a signal that is received by the touch chip when the touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel and the jth driving channel. The sensing signals output by the sensing channels detect touch points on the touch screen.

In the embodiment of the present invention, when the sensing signal outputted by the sensing channel of the other half detects that a driving channel of all the driving channels has a touched point at a corresponding position on the touch screen, the driving channel and the adjacent one of the driving channels are adjacent to the driving channel. The driving channel re-outputs the driving signal, and then receives the sensing signals outputted by the sensing channels other than the other half sensing channels of all the sensing channels of the touch screen, and then detects the touch points on the touch screen according to the sensing signals. In this way, finer detection of touch points on the touch screen can be performed.

In a third aspect, the present invention provides a touch chip, the touch chip comprising a module for performing the method in the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, the present invention provides a touch chip, the touch chip comprising a module for performing the method in any of the possible implementations of the second aspect or the second aspect.

In a fifth aspect, the present invention provides a touch device, comprising the touch chip of the third aspect or the sixth aspect, and a touch screen, the touch screen comprising a driving channel and a sensing channel, wherein the driving channel is configured to receive the touch a driving signal outputted by the driving unit of the chip, the sensing channel is configured to sense a coupling signal of the driving signal on the driving channel, and output the coupling signal as an sensing signal to the sensing unit of the touch chip.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic structural diagram of a touch screen to which a method of detecting a touch point of a touch screen can be applied according to an embodiment of the present invention.

2 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

3 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

4 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

FIG. 5 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

6 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

7 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

FIG. 8 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

9 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

FIG. 10 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

11 is a schematic flow chart of a method of detecting a touch point of a touch screen according to an embodiment of the present invention.

FIG. 12 is a schematic block diagram of a touch chip according to an embodiment of the present invention.

FIG. 13 is a schematic block diagram of a touch chip according to an embodiment of the present invention.

Figure 14 is a schematic block diagram of a touch chip in accordance with one embodiment of the present invention.

Figure 15 is a schematic block diagram of a touch device in accordance with one embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

For ease of understanding, an exemplary diagram of a system architecture of a touch screen and a touch chip capable of applying the method of detecting a touch point of a touch screen according to an embodiment of the present invention is first described. It should be understood that the method for detecting the touch point of the touch screen in the embodiment of the present invention is not limited to the system architecture shown in FIG. 1 , that is, the method for detecting the touch point of the touch screen in the embodiment of the present invention can detect the touch of the touch screen shown in FIG. 1 . Points, which can also be used to detect touch points of touch screens of other structures.

The system shown in FIG. 1 includes a touch screen 110 and a touch chip 120. A touch screen can also be referred to as a touch panel. The touch screen 110 can be a capacitive touch screen, and more specifically can be a projected mutual capacitance touch screen. The touch screen 110 includes M driving channels and N sensing channels. The touch chip 120 includes a driving circuit 121 and a sensing circuit 122. In the present invention, the driving circuit can also be referred to as a driving unit, and the sensing circuit can also be referred to as a sensing unit.

The touch chip 120 can also be referred to as a touch controller or a touch detection module, and includes a driving circuit 121 connected to the M driving channels of the touch screen 110. The sensing circuit 122 of the touch chip 120 is connected to the N sensing channels of the touch screen 110.

The driving circuit 121 of the touch chip 120 is configured to output driving signals to the M driving channels of the touch screen 110. The sensing circuit 122 of the touch chip 120 is configured to receive or sense the sensing signals output by the N sensing channels of the touch screen.

The M driving channels of the touch screen 110 are used to input the driving signals output by the driving circuit 121 of the touch chip 120. The N sensing channels of the touch screen 110 are used to output the driving circuit 121 of the touch chip 120 to a driving channel of the touch screen 110. When the driving signal is applied, the sensing signal is output to the sensing circuit 122 of the touch chip 120.

At present, when the touch chip 120 detects the touch point on the touch screen 110, the driving circuit 121 of the touch chip 120 outputs a driving signal to any one of the M driving channels of the touch screen 110 in one scanning period. The drive channel of touch screen 110 receives a drive signal. Since there is a coupling capacitor between the driving channel and the sensing channel on the touch screen, the sensing channel senses a signal from the driving channel, that is, a coupling signal that generates a driving signal on the sensing channel, and the coupling signal is also referred to as an sensing signal in the present invention. Then, the N sensing channels of the touch screen 110 are sequentially touched The sensing circuit of the chip 120 outputs the sensing signal on the sensing channel, and the sensing circuit of the touch chip 120 receives the sensing signal outputted by each sensing channel. Finally, the touch chip 120 can detect touch points on the touch screen after all the sensing signals received from the M sensing channels of the touch screen 110 are outputted by the driving circuit 121 of the touch chip 120 to the M driving channels of the touch screen 110 respectively. , calculate the position of the touch point.

It is assumed that the driving circuit 121 of the touch chip 120 outputs a driving signal to a driving channel of the touch screen 110 for a duration of T. In the T time, the N sensing channels of the touch screen 110 output a total of N sensing signals to the sensing circuit of the touch chip 120. signal. Therefore, after the driving circuit 121 of the touch chip 120 outputs the driving signals to the M driving channels of the touch screen 110, the sensing circuit of the touch chip 120 receives the M*N sensing signals output by the M sensing channels of the touch screen 110. The time is T*M.

The embodiment of the invention provides a method for detecting a touch point of a touch screen. A schematic flowchart of the method is shown in FIG. 2 . It should be understood that FIG. 2 illustrates the steps or operations of the method for detecting the touch point of the touch screen, but the steps or operations are merely examples. The method for detecting the touch point of the touch screen in the embodiment of the present invention may also perform other operations or in FIG. 2 . Deformation of each operation. Moreover, the various steps in FIG. 2 may be performed in a different order than that presented in FIG. 2, and it is possible that not all operations in FIG. 2 are to be performed.

S210: The touch chip outputs a driving signal to the S driving channels of the touch screen during the current scanning period, and the touch screen has M driving channels. Where M is a positive integer and S is a positive integer less than M.

In this step, the touch chip outputs a driving signal to the S driving channels of the M driving channels of the touch screen, and does not output the driving signals to the remaining M-S channels. The touch chip can be the touch chip 120 in FIG. 1 , and the touch screen can be the touch screen 110 in FIG. 1 . The step may specifically be that the driving circuit of the touch chip sequentially outputs driving signals to the S driving channels of the touch screen.

S is a positive integer smaller than M, which means that the touch chip has a total of M driving channels, and the touch chip outputs driving signals only to a part of the driving channels of the touch screen.

S220: When the touch chip outputs a driving signal to each of the S driving channels, the touch chip receives the sensing signals output by the N sensing channels of the touch screen. Where N is a positive integer.

The touch screen has a total of N sensing channels, so here the touch chip receives the sensing signals output by all the sensing channels of the touch screen.

When the touch chip receives the driving signal outputted by the touch chip to each of the S driving channels, the sensing signal outputted by all the sensing channels of the touch screen may specifically refer to the touch chip touch The first driving channel of the S driving channels of the touch screen outputs a driving signal, and the touch chip receives the sensing signals output by all the sensing channels of the touch screen, and then the touch chip outputs the second driving channel to the S driving channels of the touch screen. The driving chip receives the sensing channel outputted by all the sensing channels of the touch screen until the touch chip outputs a driving signal to the S driving channel of the S driving channels of the touch screen, and the touch chip receives all the sensing channel outputs of the touch screen. Inductive channel.

S230: The touch chip detects a touch point on the touch screen according to the sensing signal outputted by the N sensing channels received by the touch chip when the touch chip outputs a driving signal to the driving channels in the S driving channels.

The touch chip detects the touch point on the touch screen according to the sensing signal received in S220, and specifically calculates the position of the touch point on the touch screen.

Therefore, the sensing signal used by the touch chip to detect the touch point on the touch screen is not obtained by full-screen scanning, but only partial scanning of all the sensing signals that need to be scanned in the full-screen scanning is compared with the full-screen scanning. The signal can therefore effectively shorten the detection time of the touch point on the touch screen, thereby increasing the reporting rate of the touch screen and reducing the power consumption of the touch chip.

In the embodiment of the present invention, optionally, the touch chip can output a driving signal to only half of the M driving channels of the touch screen in one scanning period, that is, S=M/2. The two driving channels of the S driving channels may be driving channels that are not adjacent to each other among the M driving channels of the touch screen. For example, the S driving channels may be driving channels of all odd-numbered bits after sorting the M driving channels of the touch screen, or may be driving channels of all even-numbered bits.

In this way, even if the touch chip outputs a driving signal of length T to one of the driving channels of the S driving channels, and the sensing signal of all sensing channels output by the touch chip receiving the touch screen, the touch chip outputs to all of the S driving channels. After the driving signal, all the sensing signals received by the touch chip from all the sensing channels of the touch screen are only M*N/2, and the whole process time is M*T/2. It can be seen that the method of the embodiment of the present invention can effectively shorten the detection time and reduce the number of data used for calculating the position of the touch point, thereby improving the report rate of the touch screen and reducing the power consumption of the touch chip.

In the example of the present invention, the touch chip outputs a driving signal to the S driving channels of the touch screen, and receives sensing signals from all sensing channels of the touch screen, and after detecting the touch point according to the sensing signals, the touch chip can be in the next scanning cycle. The MS driving channels of the touch screen are outputted by the MS driving channels except the S driving channels, and then receive the sensing signals output by all the sensing channels of the touch screen, and then detect the touch points on the touch screen according to the sensing signals. This can make Touch points located on any of the S drive channels can be detected during the scan period, thereby reducing the missed detection rate of the touch points.

In the embodiment of the present invention, whether the touch chip outputs a driving signal to the S driving channels of the touch screen, receives the sensing signals output by all the sensing channels of the touch screen, and detects the touch point of the touch screen according to the sensing signals, or is the touch chip facing the touch screen. In addition, the MS driving channels output driving signals, receive sensing signals outputted by all sensing channels of the touch screen, and detect touch points of the touch screen according to the sensing signals, when the touch chip detects that a driving channel has touch points on corresponding positions on the touch screen. The touch chip can output a driving signal to the driving channels adjacent to the driving channel among the M driving channels of the touch screen, and receive the sensing signals outputted by all the sensing channels of the touch screen, and finally detect the touch points according to the sensing signals. Specifically, the position of the touch point can be calculated based on the sensing signals and the sensing signals received between them.

It should be understood that the adjacent driving channels of a certain driving channel in the embodiment of the present invention may be a driving channel directly adjacent to the driving channel, or may be an indirectly adjacent driving channel. The adjacent driving channel, such as the first driving channel, may include a second driving channel directly adjacent to the first driving channel, and may further include a driving channel not directly adjacent to the first driving channel but directly adjacent to the second driving channel .

Optionally, when the touch chip detects that a driving channel has a touch point at a corresponding position on the touch screen, the touch chip can output a driving signal to the driving channel adjacent to the driving channel among the M driving channels of the touch screen. The specific step may be: the touch chip outputs a driving signal to the driving channel, the touch chip receives the sensing signal outputted by all the sensing channels, and detects, according to the N sensing signal, a touch point corresponding to the driving channel on the touch screen, The adjacent driving channel of the driving channel outputs a driving signal for subsequent processes; or the touch chip outputs a driving signal to the S driving channels, and the touch chip receives the sensing signals output by all the sensing channels according to the N*S The sensing signals detect that there is a touch point at a position corresponding to the driving channel on the touch screen, and then output a driving signal to the adjacent driving channel of the driving channel for subsequent processes.

It should be understood that the touch chip only outputs driving signals to a part of the driving channels of the touch screen, but the S driving channels are not limited to half the number of driving channels on the touch screen, and even half of the driving channels are not limited to two or two. Adjacent drive channels. For example, the S driving channels may include all driving channels located in the middle of the touch screen and partial driving channels on the edge of the touch screen, may also be driven in a non-fixed interval arrangement, or may be driven in a “regular” arrangement, such as “ 1, 3, 4, 7, 9, 10, 13, 15, 16, 19..." or "1, 2, 5, 6, 8, 10, 12, 14, 16, 17". The present invention does not limit the range of S drive channels.

A method of detecting a touch point of a touch screen according to an embodiment of the present invention will be described in detail below with reference to FIGS. 3 and 4.

As shown in FIG. 3, the touch screen 310 has 10 driving channels, which are respectively Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9 and Y10, and the touch screen 310 has 8 sensing channels, respectively X1. X2, X3, X4, X5, X6, X7 and X8. The intersection of the driving channel and the sensing channel in FIG. 3 indicates that the touch chip receives the sensing signal received and outputted by the sensing channel when the touch chip outputs a driving signal to the driving channel. The black circle in Figure 3 represents the touch points on the touch screen.

In the first cycle, the touch chip 320 outputs a driving signal to the driving channel Y1 of the touch screen 310, receives the sensing signals output by the eight sensing channels of the touch screen 310, and detects no touch points on the driving channel Y1 according to the eight sensing signals. The touch chip 320 outputs a driving signal to the driving channel Y3, receives sensing signals output by the eight sensing channels, and detects no touch points on the driving channel Y3 according to the eight sensing signals. The touch chip 320 outputs a driving signal to the driving channel Y5, receives sensing signals output by the eight sensing channels, and detects a touch point on the driving channel Y5 according to the eight sensing signals.

After detecting the touch point on the driving channel Y5, the touch chip 320 outputs a driving signal to the driving channel Y4, receives the sensing signals output by the eight sensing channels, and detects the touch point of the Y4 according to the eight sensing signals; the touch chip 320 The driving channel Y6 outputs a driving signal, receives the sensing signals output by the eight sensing channels, and detects no touch points on the Y6 according to the eight sensing signals.

The touch chip 320 continues to output a driving signal to the driving channel Y7, and receives sensing signals output by the eight sensing channels, and detects no touch points on the driving channel Y7 according to the eight sensing signals. The touch chip 320 continues to output a driving signal to the driving channel Y9, and receives sensing signals output by the eight sensing channels, and detects no touch points on the driving channel Y9 according to the eight sensing signals. The first cycle of touch detection ends.

As can be seen from FIG. 3, the touch chip 320 does not need to output a driving signal to all driving channels to detect a touch point on the touch screen 310.

In the next cycle, as shown in FIG. 4, the touch chip 320 outputs a driving signal to the driving channel Y2 of the touch screen 310, and receives the sensing signals output by the eight sensing channels of the touch screen 310, and detects that there is no driving channel Y2 according to the eight sensing signals. Touch the point. The touch chip 320 outputs a driving signal to the driving channel Y4, receives sensing signals output by the eight sensing channels, and detects a touch point on the driving channel Y4 according to the eight sensing signals. The same reference numerals in Fig. 4 as those in Fig. 3 denote the same The meaning, for the sake of brevity, will not be repeated here.

After detecting the touch point on the driving channel Y4, the touch chip 320 outputs a driving signal to the driving channel Y3, receives the sensing signals output by the eight sensing channels, and detects no touch points on the Y3 according to the eight sensing signals; the touch chip 320 The driving signal is output to the driving channel Y5, and the sensing signals output by the eight sensing channels are received, and the touch points of Y5 are detected according to the eight sensing signals.

The touch chip 320 continues to output a driving signal to the driving channel Y6, receives the sensing signals output by the eight sensing channels, and detects no touch points on the driving channel Y6 according to the eight sensing signals. The touch chip 320 outputs a driving signal to the driving channel Y8, and receives sensing signals output by the eight sensing channels, and detects no touch points on the driving channel Y8 according to the eight sensing signals. The touch chip 320 continues to output a driving signal to the driving channel Y10, and receives sensing signals output by the eight sensing channels, and detects no touch points on the driving channel Y10 according to the eight sensing signals.

As can be seen from FIG. 4, the touch chip 320 also does not need to output a driving signal to all driving channels to detect a touch point on the touch screen 310.

As shown in FIG. 3 and FIG. 4, when there is no touch point on all the driving channels, the touch chip only needs to output driving signals to half of the driving channels in one cycle, and the number of driving channels with touch points increases. The number of drive channels required for the touch chip to output a drive signal is increased. As long as there are not touch points on all of the half of the driving channels, the number of driving signals required by the touch chip to output the driving signal is always smaller than the total number of driving channels of the touch screen.

In the embodiment of the present invention, the touch chip can alternately output driving signals to the S driving channels and the other MS driving channels in different scanning periods, for example, alternately output driving signals to the odd driving channels and the even driving channels (for example, in an odd scanning period). The driving signal is output to the odd driving channel, and the driving signal is output to the even driving channel in the even scanning period, and then the sensing signals output by the N sensing channels are respectively received, and finally the touch points on the touch screen are calculated according to the sensing signals, thereby not only saving each The scan time of the scan cycle, and can reduce the missed detection rate of the touch point.

The embodiment of the invention further provides a method for detecting a touch point of a touch screen, and a schematic flowchart of the method is shown in FIG. 5 . It should be understood that FIG. 5 illustrates the steps or operations of the method for detecting the touch point of the touch screen, but the steps or operations are merely examples. The method for detecting the touch point of the touch screen may also perform other operations or the method in FIG. 5 . Deformation of each operation. Moreover, the various steps in FIG. 5 may be performed in a different order than that presented in FIG. 5, and it is possible that not all operations in FIG. 5 are to be performed.

S510, the touch chip outputs driving to the M driving channels of the touch screen during the current scanning period. signal. Where M is a positive integer, indicating that the touch screen has a total of M drive channels.

S520: When the touch chip outputs a driving signal to each of the M driving channels, the touch chip receives the sensing signals output by the K sensing channels of the touch screen.

Where N is a positive integer, indicating that the touch screen has a total of N sensing channels; K is a positive integer less than N, indicating the sensing signal outputted by the touch chip to a portion of the sensing channel receiving the touch screen.

S530: The touch chip detects a touch point on the touch screen according to the sensing signal outputted by the K sensing channels received by the touch chip when the driving chip outputs the driving signal to the M driving channels.

In other words, in the implementation of the present invention, when the touch chip outputs a driving signal to all driving channels of the touch screen, it only needs to receive the sensing signal outputted by the partial sensing channel, and then the position of the touch point on the touch screen can be detected.

Therefore, in the embodiment of the present invention, the touch chip does not need to perform full-screen scanning on the touch screen, thereby effectively reducing the detection time of the touch point on the touch screen, thereby improving the reporting rate of the touch screen and reducing the power consumption of the touch chip. .

In the embodiment of the present invention, optionally, when the touch chip can output a driving signal to all the driving channels of the touch screen in one scanning period, it can receive only the sensing signals output by half of the sensing channels of the N sensing channels of the touch screen. That is, K = N/2. The two sensing channels of the K sensing channels may be sensing channels that are not adjacent to each other among the N sensing channels of the touch screen. For example, the K sensing channels may be all odd-numbered sensing channels that sort the N sensing channels of the touch screen, or may be all even-numbered sensing channels.

In this way, after the touch chip outputs the driving signals to all the driving channels, the sensing chip receives at most M*N/2 of all the sensing signals from the K sensing channels of the touch screen. It can be seen that the method of the embodiment of the present invention can effectively shorten the detection time and reduce the number of data used for calculating the position of the touch point, thereby improving the report rate of the touch screen and reducing the power consumption of the touch chip.

In the example of the present invention, the touch chip outputs a driving signal to all the driving channels of the touch screen, and receives the sensing signals from the partial sensing channels of the touch screen, and after detecting the touch points according to the sensing signals, the touch chip can be directed to the touch screen in the next scanning period. All driving channels output driving signals, and then receive sensing signals output from other sensing channels of the touch screen, and then detect touch points on the touch screen according to the sensing signals.

In the embodiment of the present invention, optionally, when the touch chip outputs a driving signal to all driving channels of the touch screen, receives sensing signals output by the K sensing channels of the touch screen, and detects touch points of the touch screen according to the sensing signals, if the touch is The chip detects a corresponding bit of a driving channel on the touch screen When the touch point is set, the touch chip can re-output the driving signal to the driving channel and the adjacent driving channel of the driving channel, and then receive the sensing signals output by the other NK sensing channels of the touch screen, and finally according to the sensing signals. The touch point is detected, and specifically, the position of the touch point is calculated according to the received signal received twice.

Similarly, when the touch chip outputs a driving signal to all driving channels of the touch screen, receives sensing signals output by another NK sensing channels of the touch screen, and detects touch points of the touch screen according to the sensing signals, if the touch chip detects When a driving channel has a touch point at a corresponding position on the touch screen, the touch chip can re-output a driving signal to the driving channel and the adjacent driving channel of the driving channel, and then receive another K sensing channel outputs of the touch screen. The sensing signal is finally detected by the sensing signal according to the sensing signals, and specifically, the position of the touch point is calculated according to the sensing signals received twice.

It should be understood that the touch chip only receives the sensing signal outputted by the partial sensing channel of the touch screen, but the K sensing channels are not limited to half of the sensing channels on the touch screen, and even half of the sensing channels are not limited to two or two. Non-adjacent sensing channels. For example, the K sensing channels may include all sensing channels located in the middle of the touch screen and partial sensing channels on the edge of the touch screen. The present invention does not limit the range of the K sensing channels.

A method of detecting a touch point of a touch screen according to an embodiment of the present invention will be described in detail below with reference to FIGS. 6 and 7. The same reference numerals in FIG. 6 and FIG. 7 as those in FIG. 3 denote the same or similar meanings, and are not described herein again for detection.

In the first cycle, the touch chip 320 sequentially outputs driving signals to the driving channels Y1, Y2, and Y3 of the touch screen 310, and then receives sensing signals sequentially outputted by the sensing channels X1, X3, X5, and X7 of the touch screen 310, according to the received signals. The sensing signal detects no touch points on the drive channels Y1, Y2, and Y3. The touch chip 320 outputs a driving signal to the driving channel Y4, receives sensing signals output from the sensing channels X1, X3, X5, and X7, and detects touch points on the driving channel Y4 according to the four sensing signals. The touch chip 320 outputs a driving signal to the driving channel Y5, and receives sensing signals outputted by the sensing channels X1, X3, X5, and X7, and detects driving channels according to the four sensing signals. Touch point on Y5. The touch chip 320 sequentially outputs driving signals to the driving channels Y6 to Y10 of the touch screen 310, and then receives sensing signals sequentially outputted by the sensing channels X1, X3, X5 and X7 of the touch screen 310, and sequentially detects the driving channel Y6 according to the received sensing signals. There is no touch point on Y10.

Because the touch chip 320 detects that there are touch points on the drive channels Y4 and Y5, as shown in FIG. 7, the touch chip outputs drive signals to Y3, Y4, Y5, and Y6, and receives four other sensing channels X2 and X4. The sensing signals output by X6 and X8 detect the touch points on the touch screen according to the received sensing signals.

The present invention also proposes another method of detecting a touch point of a touch screen, and a schematic flowchart of the method is shown in FIG. It should be understood that FIG. 8 illustrates the steps or operations of the method for detecting the touch point of the touch screen, but the steps or operations are merely examples. The method for detecting the touch point of the touch screen may also perform other operations or the method in FIG. 8 . Deformation of each operation. Moreover, the various steps in FIG. 8 may be performed in a different order than that presented in FIG. 8, and it is possible that not all operations in FIG. 8 are to be performed.

S810, the touch chip outputs a driving signal to the S driving channels of the touch screen in the current scanning period, and the touch screen has M driving channels.

Wherein, M is a positive integer, and S is a positive integer smaller than M, indicating that the touch chip outputs a driving signal only to a part of the driving channels of the touch screen.

S820: When the touch chip outputs a driving signal to each of the S driving channels, the touch chip receives the sensing signals output by the K sensing channels of the touch screen, and the touch screen has N sensing channels.

Where N is a positive integer and K is a positive integer less than N, indicating that the touch chip only receives the sensing signal outputted by the partial sensing channel of the touch screen.

S830, the touch chip outputs a driving signal to the M-S driving channels of the S driving channels in the M driving channels of the touch screen in the next scanning period.

S840, when the touch chip outputs a driving signal to each of the M-S driving channels, the touch chip receives the sensing signals output by the N-K sensing channels of the touch screen.

The S850, the touch chip outputs a driving signal to the S driving channels when the touch chip outputs the driving signal, and the sensing signals output by the K sensing channels received by the touch chip, and the touch chip outputs the driving signal to the MS driving channels, and the touch chip The sensing signals output by the received NK sensing channels detect touch points on the touch screen.

In the embodiment of the present invention, the touch chip outputs a driving signal only to a part of the driving channels of all the driving channels of the touch screen, and only receives the sensing signal outputted by the partial sensing channel, and then outputs a driving signal to another driving channel for the next time. Receiving the sensing signal outputted by another part of the sensing channel, the touch chip can detect the touch point without detecting the sensing signal outputted by the driving channel when all the driving channels of the touch screen are input, thereby shortening the detection time and reducing the detection power consumption. When there is a touch point on the touch screen, the touch point is not missed.

Moreover, in the scenario that the touch chip cannot receive the sensing signals output by all the sensing channels at one time, the method of the embodiment of the present invention can also acquire all the data in stages, thereby completing the detection of the touch points.

Optionally, S=M/2, K=N/2, that is, the touch chip can output the driving signal to only half of the driving channels of the touch screen and receive the sensing signals output by half of the sensing channels.

The two driving channels of the S driving channels may not be adjacent, and any two sensing channels of the K sensing channels may not be adjacent.

Optionally, when the touch chip detects that the i-th driving channel of the S driving channels has a touch point at a corresponding position on the touch screen, the touch chip may be in the current scanning period to the touch screen. The drive channels adjacent to the i-th drive channel of the M drive channels respectively output two drive signals, and i is a positive integer less than or equal to S. Then, the touch chip receives the first output of the driving signal to the driving channel adjacent to the i-th driving channel, and the sensing signal outputted by the K sensing channels of the touch screen and the touch chip are adjacent to the i-th driving channel. The sensing signal output by the NK sensing channels when the driving channel outputs the driving signal for the second time. At this time, the touch chip needs to re-output the driving signal to the i-th driving channel, and then the touch chip receives the sensing signal output by the N-K sensing channels when the touch chip outputs the driving signal to the i-th driving channel. Finally, the touch chip detects the touch point of the touch screen according to all the sensing signals.

Similarly, when the touch chip detects that the jth driving channel of the MS driving channels has a touch point at a corresponding position on the touch screen, the touch chip may be in the next scanning period. The driving channels adjacent to the jth driving channel of the M driving channels of the touch screen respectively output driving signals twice, and j is a positive integer smaller than or equal to MS. Then, the touch chip receives the first output driving signal of the touch chip to the driving channel adjacent to the jth driving channel, and the sensing signal outputted by the NK sensing channels of the touch screen and the touch chip are adjacent to the jth driving channel. The sensing signal output by the K sensing channels when the driving channel outputs the driving signal for the second time. At this time, the touch chip further needs to output a driving signal to the jth driving channel, and then the touch chip receives the sensing signal output by the other K sensing channels when the touch chip outputs the driving signal to the jth driving channel. Finally, the touch chip detects the touch point of the touch screen according to all the sensing signals.

In the embodiment of the present invention, the touch chip can output channel signals to all driving channels in each scanning period, and then alternately receive sensing signals output by K sensing channels and another NK sensing channels in consecutive scanning periods. For example, the sensing signals of the odd-numbered sensing channels and the even-numbered sensing channels are alternately received, and finally the touch points on the touch screen are calculated according to the sensing signals, which not only saves the scanning time of each scanning cycle, but also reduces the missed detection rate of the touched points.

A method of detecting a touch point of a touch screen according to another embodiment of the present invention will be described in detail below with reference to FIGS. 9 and 10. The same reference numerals in FIGS. 9 and 10 as those in FIG. 3 denote the same meanings, and are not described herein again for the sake of brevity.

As shown in FIG. 9, in the first cycle, the touch chip 320 outputs a driving signal to the driving channel Y1 of the touch screen 310, and receives sensing signals output from the sensing channels X1, X3, X5, and X7 of the touch screen 310. The touch chip 320 outputs a driving signal to the driving channel Y3, and receives sensing signals output from the sensing channels X1, X3, X5, and X7. The touch chip 320 outputs a driving signal to the driving channel Y5 of the touch screen 310 to receive the sensing signals output by the sensing channels X1, X3, X5 and X7 of the touch screen 310. The touch chip 320 outputs a driving signal to the driving channel Y7, and receives sensing signals output from the sensing channels X1, X3, X5, and X7. The touch chip 320 outputs a driving signal to the driving channel Y9, and receives sensing signals output from the sensing channels X1, X3, X5, and X7.

As shown in FIG. 10, in the next cycle, the touch chip 320 outputs a driving signal to the driving channel Y2 of the touch screen 310, and receives sensing signals output from the sensing channels X2, X4, X6 and X8 of the touch screen 310. The touch chip 320 outputs a driving signal to the driving channel Y4, and receives sensing signals output from the sensing channels X2, X4, X6 and X8. The touch chip 320 outputs a driving signal to the driving channel Y6 of the touch screen 310 to receive the sensing signals output by the sensing channels X2, X4, X6 and X8 of the touch screen 310. The touch chip 320 outputs a driving signal to the driving channel Y8, and receives sensing signals output from the sensing channels X2, X4, X6 and X8. The touch chip 320 outputs a driving signal to the driving channel Y10, and receives sensing signals output from the sensing channels X2, X4, X6 and X8.

The touch chip 320 detects touch points on the touch screen according to all the sensing signals received in the above process. The scan results for two cycles are shown in Figure 11. As can be seen from Fig. 11, the touch point can be detected without scanning all signals.

A touch chip according to an embodiment of the present invention will be described below with reference to FIGS. 12 to 15. It should be understood that the touch chips shown in FIG. 12 to FIG. 15 are only examples. The touch chips of the embodiments of the present invention may further include other modules or units, or include functions similar to those of the modules in FIG. 12 to FIG. Module, or It is not intended to include all of the modules in Figures 12 through 15.

FIG. 12 is a schematic block diagram of a touch chip 1200 according to an embodiment of the invention. The touch chip 1200 includes a driving unit 1210, a processing unit 1220, and a sensing unit 1230.

The driving unit 1210 is configured to output a driving signal to the S driving channels of the touch screen during the current scanning period, the touch screen has M driving channels, M is a positive integer, and S is a positive integer smaller than M.

The sensing unit 1230 is configured to receive, when the driving unit outputs a driving signal to each of the S driving channels, an sensing signal output by the N sensing channels of the touch screen, where N is a positive integer.

The processing unit 1220 is configured to detect a touch point on the touch screen according to the sensing signal output by the N sensing channels received by the sensing unit when the driving unit outputs the driving signal to the S driving channels.

Optionally, as an embodiment, S=M/2, any two of the S driving channels are not adjacent.

Optionally, as an embodiment, when the processing unit detects that the i-th driving channel of the S driving channels has a touch point at a corresponding position on the touch screen, the driving unit is further used to The driving signal is output to at least one of the M driving channels adjacent to the i-th driving channel in the current scanning period, where i is a positive integer less than or equal to S.

Correspondingly, the sensing unit is further configured to receive an induction signal output by the N sensing channels when the driving unit outputs a driving signal to a driving channel adjacent to the ith driving channel.

Correspondingly, the processing unit is further configured to: when the driving unit outputs a driving signal to the driving channel adjacent to the ith driving channel, the sensing signals output by the sensing channels are sent by the N sensing channels, A touch point on the touch screen is detected.

Optionally, as an embodiment, the driving unit is further configured to output a driving signal to the M-S driving channels except the S driving channels among the M driving channels in a next scanning period.

Correspondingly, the sensing unit is further configured to receive the driving unit to the M-S driving channels The sensing signals output by the N sensing channels when each driving channel outputs a driving signal.

Correspondingly, the processing unit is further configured to detect, according to the sensing signal output by the N sensing channels received by the sensing unit, when the driving unit outputs a driving signal to the MS driving channels, detecting the touch screen Touch the point.

Optionally, as an embodiment, when the processing unit detects that the jth driving channel of the MS driving channels has a touch point at a corresponding position on the touch screen, the driving unit is further used to Driving a drive signal to at least one of the M drive channels adjacent to the jth drive channel in a next scan period, where j is a positive integer less than or equal to MS.

Correspondingly, the sensing unit is further configured to receive an induction signal output by the N sensing channels when the driving unit outputs a driving signal to a driving channel adjacent to the jth driving channel.

Correspondingly, the processing unit is further configured to: when the driving unit outputs a driving signal to the driving channel adjacent to the jth driving channel, the sensing signal output by the N sensing channels received by the sensing unit, A touch point on the touch screen is detected.

It should be understood that the foregoing and other operations and/or functions of the respective units of the touch chip of the embodiment of the present invention shown in FIG. 12 are respectively implemented in order to implement the corresponding flow of the touch point method for detecting the touch screen in FIG. 2, for the sake of brevity, Let me repeat.

FIG. 13 is a schematic block diagram of a touch chip 1300 according to an embodiment of the invention. The touch chip 1300 includes a driving unit 1310, a processing unit 1320, and a sensing unit 1330.

The driving unit 1310 is configured to output a driving signal to the M driving channels of the touch screen during the current scanning period, where M is a positive integer.

The sensing unit 1330 is configured to receive, when the driving unit outputs a driving signal to each of the M driving channels, an sensing signal output by the K sensing channels of the touch screen, where the touch screen has N sensing Channel, N is a positive integer, and K is a positive integer less than N.

The processing unit 1320 is configured to detect a touch point on the touch screen according to the sensing signal output by the K sensing channels received by the sensing unit when the driving unit outputs a driving signal to the M driving channels.

Optionally, as an embodiment, K=N/2, any two of the K sensing channels are not adjacent.

Optionally, as an embodiment, when the processing unit detects that the i-th driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, the driving unit is further used to The driving signal is output to the M driving channels during the current scanning period, and i is a positive integer less than or equal to M.

Correspondingly, the sensing unit is further configured to receive, when the driving unit outputs a driving signal to the Mth driving channel, the sensing signals of the NK outputs of the N sensing channels except the K sensing channels. .

Correspondingly, the processing unit is further configured to: when the driving unit outputs a driving signal to the Mth driving channel, the sensing signal output by the NK sensing channels received by the sensing unit is detected on the touch screen Touch point.

Optionally, as an embodiment, the driving unit is further configured to output a driving signal to the M driving channels in a next scanning period.

Correspondingly, the sensing unit is further configured to receive, when the driving unit outputs a driving signal to each of the M driving channels, the NK of the N sensing channels except the K sensing channels. The sensing signal output by the sensing channel.

Correspondingly, the processing unit is further configured to detect, according to the sensing signal output by the NK sensing channels received by the sensing unit, when the driving unit outputs a driving signal to the M driving channels, detecting the touch screen Touch the point.

Optionally, as an embodiment, when the processing unit detects that the jth driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, the driving unit is further used to The driving signal is output to the M driving channels in the next scanning period, and j is a positive integer smaller than or equal to MS.

Correspondingly, the sensing unit is further configured to receive an induction signal output by the K sensing channels when the driving unit outputs a driving signal to the Mth driving channel.

Correspondingly, the processing unit is further configured to detect the sensing signal output by the K sensing channels received by the sensing unit when the driving unit outputs a driving signal to the jth driving channel, and detect the touch screen Touch point.

It should be understood that the foregoing and other operations and/or functions of the respective units of the touch chip of the embodiment of the present invention shown in FIG. 13 are respectively used to implement the corresponding flow of the touch point method for detecting the touch screen in FIG. 5 . For the sake of brevity, it will not be repeated here.

FIG. 14 is a schematic block diagram of a touch chip 1400 according to an embodiment of the present invention. The touch chip 1400 includes a driving unit 1410, a processing unit 1420, and a sensing unit 1430.

The driving unit 1410 is configured to output a driving signal to the S driving channels of the touch screen during the current scanning period, the touch screen has M driving channels, M is a positive integer, and S is a positive integer smaller than M.

The sensing unit 1430 is configured to receive, when the driving unit outputs a driving signal to each of the S driving channels, an sensing signal output by the K sensing channels of the touch screen, where the touch screen has N sensing Channel, N is a positive integer, and K is a positive integer less than N.

The processing unit 1420 is configured to detect a touch point on the touch screen according to the sensing signal output by the K sensing channels received by the sensing unit when the driving unit outputs a driving signal to the S driving channels.

The driving unit 1410 is further configured to output a driving signal to the M-S driving channels except the S driving channels among the M driving channels of the touch screen in the next scanning period.

The sensing unit 1430 is further configured to receive an induction signal output by the N-K sensing channels of the touch screen when the driving unit outputs a driving signal to each of the M-S driving channels.

The processing unit 1420 is further configured to detect a touch point on the touch screen according to the sensing signal output by the N-K sensing channels received by the sensing unit when the driving unit outputs a driving signal to the M-S driving channels.

In the embodiment of the present invention, the touch chip outputs a driving signal only to a part of the driving channels of all the driving channels of the touch screen, and only receives the sensing signal outputted by the partial sensing channel, and then outputs a driving signal to another driving channel for the next time. Receives the sensing signal from the output of another part of the sensing channel. This makes the detection time and the detection power consumption shorter when there is no touch point on the touch screen, and the touch point is not missed when there is a touch point on the touch screen.

Optionally, as an embodiment, S=M/2, K=N/2, any two of the S driving channels are not adjacent, and any two of the K sensing channels are inductive The channels are not adjacent.

Optionally, as an embodiment, when the processing unit detects that the i-th driving channel of the S driving channels has a touch point at a corresponding position on the touch screen, the driving unit is further configured to be used in And driving a driving signal to the driving channel adjacent to the i-th driving channel among the M driving channels of the touch screen in the current scanning period, where i is a positive integer less than or equal to S.

Correspondingly, the sensing unit is further configured to: when the driving unit outputs a driving signal to a driving channel adjacent to the i-th driving channel, the K sensing channels and the NK sensing channels of the touch screen The sensed signal output.

Correspondingly, the driving unit is further configured to re-output a driving signal to the ith driving channel.

Correspondingly, the sensing unit is further configured to receive an induction signal output by the N-K sensing channels when the driving unit outputs a driving signal to the ith driving channel.

Correspondingly, the processing unit is further configured to: when the driving unit outputs a driving signal to the driving channel adjacent to the i-th driving channel, the K sensing channels and the NK received by the sensing unit The sensing signal outputted by the sensing channel, and detecting the touch of the touch screen according to the sensing signal output by the NK sensing channels received by the sensing unit when the driving unit re-inputs the driving signal to the ith driving channel point.

Optionally, as an embodiment, when the processing unit detects that the jth driving channel of the MS driving channels has a touch point at a corresponding position on the touch screen, the driving unit is further configured to be used in Outputting a driving signal to a driving channel adjacent to the jth driving channel among the M driving channels of the touch screen in the next scanning period, where j is a positive integer less than or equal to MS;

Correspondingly, the sensing unit is further configured to: when the driving unit outputs a driving signal to a driving channel adjacent to the jth driving channel, the NK sensing channels and the K sensing channels of the touch screen The sensed signal output.

Correspondingly, the driving unit is further configured to re-output a driving signal to the jth driving channel;

Correspondingly, the sensing unit is further configured to receive an induction signal output by the K sensing channels when the driving unit re-outputs a driving signal to the jth driving channel.

Correspondingly, the processing unit is further configured to: when the driving unit outputs a driving signal to a driving channel adjacent to the jth driving channel, the NK sensing channels and the K devices received by the sensing unit Inductive signal outputted by the sensing channel, and detecting a touch of the touch screen according to a sensing signal output by the K sensing channels received by the sensing unit when the driving unit re-inputs a driving signal to the jth driving channel point.

It should be understood that the foregoing and other operations and/or functions of the respective units of the touch chip of the embodiment of the present invention shown in FIG. 14 are respectively implemented in order to implement the corresponding flow of the touch point method for detecting the touch screen in FIG. Let me repeat.

FIG. 15 is a schematic block diagram of a touch device 1500 according to an embodiment of the present invention. Touch chip The 1500 includes a touch screen 1510 and a touch chip 1520.

The touch screen 1510 includes a driving channel for receiving a driving signal outputted by a driving unit of the touch chip, and a sensing channel for sensing a coupling signal of a driving signal on the driving channel, and The coupled signal is output as an inductive signal to the sensing unit of the touch chip.

The touch chip 1520 can be the touch chip 1200 as shown in FIG. 12 , or the touch chip 1300 shown in FIG. 13 , or the touch chip 1400 shown in FIG. 14 . For the sake of brevity, it will not be repeated here.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The function is implemented in the form of a software functional unit and sold or made as a standalone product When used, it can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A touch chip, comprising:

a driving unit, configured to: output a driving signal to the S driving channels of the touch screen during the current scanning period, the touch screen has M driving channels, M is a positive integer, and S is a positive integer smaller than M;

The sensing unit is configured to: when the driving unit outputs a driving signal to each of the S driving channels, receive an sensing signal output by the N sensing channels of the touch screen, where N is a positive integer;

The processing unit is configured to: when the driving unit outputs a driving signal to the S driving channels, the sensing signals output by the N sensing channels received by the sensing unit detect a touch point on the touch screen.
The touch control chip of claim 1 , wherein S=M/2, any two of the S driving channels are not adjacent.
The touch control chip according to claim 2, wherein when the processing unit detects that the i-th driving channel of the S driving channels has a touch point at a corresponding position on the touch screen, The driving unit is further configured to output a driving signal to the at least one driving channel adjacent to the i-th driving channel among the M driving channels during the current scanning period, where i is a positive integer less than or equal to S;

The sensing unit is further configured to receive an induction signal output by the N sensing channels when the driving unit outputs a driving signal to a driving channel adjacent to the ith driving channel;

The processing unit is further configured to: when the driving unit outputs a driving signal to the driving channel adjacent to the i-th driving channel, the sensing signal output by the N sensing channels received by the sensing unit, the detecting station The touch point on the touch screen.
The touch control chip according to claim 2 or 3, wherein the driving unit is further configured to output, to the MS driving channels except the S driving channels, among the M driving channels in a next scanning period. Drive signal

The sensing unit is further configured to receive an induction signal output by the N sensing channels when the driving unit outputs a driving signal to each of the M-S driving channels;

The processing unit is further configured to detect a touch point on the touch screen when the driving unit outputs a driving signal to the M-S driving channels, and the sensing signals output by the N sensing channels received by the sensing unit.
The touch chip according to claim 4, wherein the processing unit checks When the jth driving channel of the MS driving channels is detected to have a touch point at a corresponding position on the touch screen, the driving unit is further configured to be in the M driving channels in the next scanning period. And driving, by the at least one driving channel adjacent to the jth driving channel, a driving signal, where j is a positive integer less than or equal to MS;

The sensing unit is further configured to receive an induction signal output by the N sensing channels when the driving unit outputs a driving signal to a driving channel adjacent to the jth driving channel;

The processing unit is further configured to detect the sensing signal output by the N sensing channels received by the sensing unit when the driving unit outputs a driving signal to the driving channel adjacent to the jth driving channel. Touch points on the touch screen.
A touch chip, comprising:

a driving unit, configured to: output a driving signal to the M driving channels of the touch screen during the current scanning period, where M is a positive integer;

The sensing unit is configured to: when the driving unit outputs a driving signal to each of the M driving channels, receive an sensing signal output by the K sensing channels of the touch screen, where the touch screen has N sensing Channel, N is a positive integer, and K is a positive integer less than N;

The processing unit is configured to: when the driving unit outputs a driving signal to the M driving channels, the sensing signals output by the K sensing channels received by the sensing unit detect a touch point on the touch screen.
The touch control chip according to claim 6, wherein K=N/2, and any two of the K sensing channels are not adjacent.
The touch control chip according to claim 7, wherein the processing unit detects that the i-th driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, the driving The unit is further configured to output a driving signal to the driving channel adjacent to the i-th driving channel among the i-th driving channel and the M driving channels during the current scanning period, where i is less than or equal to M Positive integer

The sensing unit is further configured to receive, when the driving unit outputs a driving signal to the driving channel adjacent to the ith driving channel and the ith driving channel, wherein the N sensing channels are Inductive signals of NK outputs outside the K sensing channels;

The processing unit is further configured to: when the driving unit outputs a driving signal to the driving channel adjacent to the ith driving channel and the ith driving channel, the NK sensing received by the sensing unit The sensing signal outputted by the channel detects a touch point on the touch screen.
The touch control chip according to claim 7 or 8, wherein the driving unit is further configured to output a driving signal to the M driving channels in a next scanning period;

The sensing unit is further configured to receive, when the driving unit outputs a driving signal to each of the M driving channels, the NK sensing channels of the N sensing channels except the K sensing channels Inductive signal output;

The processing unit is further configured to detect a touch point on the touch screen when the driving unit outputs a driving signal to the M driving channels, the sensing signals output by the N-K sensing channels received by the sensing unit.
The touch control chip according to claim 9, wherein the processing unit detects that the jth driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, The driving unit is further configured to output a driving signal to the driving channel adjacent to the jth driving channel among the jth driving channel and the M driving channels in the next scanning period, where j is less than or equal to a positive integer of MS;

The sensing unit is further configured to receive an induction signal output by the K sensing channels when the driving unit outputs a driving signal to the driving channels adjacent to the jth driving channel and the jth driving channel;

The processing unit is further configured to: when the driving unit outputs a driving signal to the driving channel adjacent to the jth driving channel and the jth driving channel, the K sensing channels received by the sensing unit The sensed signal is output to detect a touch point on the touch screen.
A touch device, comprising: a touch screen and the touch chip according to any one of claims 1 to 10;

The touch screen includes a driving channel for receiving a driving signal outputted by a driving unit of the touch chip, and a sensing channel for sensing a coupling signal of a driving signal on the driving channel, and The coupled signal is output as an inductive signal to the sensing unit of the touch chip.
A method for detecting a touch point of a touch screen, comprising:

The touch chip outputs a driving signal to the S driving channels of the touch screen during the current scanning period, the touch screen has M driving channels, M is a positive integer, and S is a positive integer smaller than M;

When the touch chip outputs a driving signal to each of the S driving channels, the touch chip receives the sensing signals output by the N sensing channels of the touch screen, where N is a positive integer;

The touch chip detects a touch point on the touch screen according to the sensing signal output by the N sensing channels received by the touch chip when the touch chip outputs a driving signal to the S driving channels.
The method of claim 12, wherein S = M/2, any two of the S drive channels are not adjacent.
The method of claim 13 wherein the method further comprises:

When the touch chip detects that the i-th driving channel of the S driving channels has a touch point at a corresponding position on the touch screen, the touch chip sends the M driving in the current scanning period. a driving channel adjacent to the i-th driving channel in the channel outputs a driving signal, where i is a positive integer less than or equal to S;

The sensing chip outputs the sensing signals output by the N sensing channels when the touch chip outputs a driving signal to the driving channel adjacent to the ith driving channel;

When the touch chip outputs a driving signal to the driving channel adjacent to the i-th driving channel, the sensing signal output by the N sensing channels received by the touch chip detects the Touch points on the touch screen.
The method according to claim 13 or 14, wherein the method further comprises:

The touch chip outputs a driving signal to the M-S driving channels of the M driving channels except the S driving channels in a next scanning period;

The touch chip receives an induction signal output by the N sensing channels when the touch chip outputs a driving signal to each of the M-S driving channels;

The touch sensor detects a touch point on the touch screen when the touch chip outputs a driving signal to the M-S driving channels, and the sensing signals output by the N sensing channels received by the touch chip.
The method of claim 15 wherein the method further comprises:

When the touch chip detects that the jth driving channel of the MS driving channels has a touch point at a corresponding position on the touch screen, the touch chip sends the M to the M in the next scanning period. a driving channel adjacent to the jth driving channel in the driving channel outputs a driving signal, where j is a positive integer less than or equal to MS;

The touch chip receives an induction signal output by the N sensing channels when the touch chip outputs a driving signal to a driving channel adjacent to the jth driving channel;

The touch chip is adjacent to the driving channel of the j-th driving channel according to the touch chip When the driving signal is output, the sensing signals output by the N sensing channels received by the touch chip detect a touch point on the touch screen.
A method for detecting a touch point of a touch screen, comprising:

The touch chip outputs a driving signal to the M driving channels of the touch screen during the current scanning period, where M is a positive integer;

When the touch chip outputs a driving signal to each of the M driving channels, the touch chip receives the sensing signals output by the K sensing channels of the touch screen, and the touch screen has N sensing signals. Channel, N is a positive integer, and K is a positive integer less than N;

The touch chip detects a touch point on the touch screen according to the sensing signal output by the K sensing channels received by the touch chip when the touch chip outputs a driving signal to the M driving channels.
The method according to claim 17, wherein K=N/2, any two of the K sensing channels are not adjacent.
The method of claim 18, wherein the method further comprises:

When the touch chip detects that the i-th drive channel of the M drive channels has a touch point at a corresponding position on the touch screen, the touch chip is to the i-th in the current scan period. a drive channel and a drive channel adjacent to the i-th drive channel of the M drive channels output a drive signal, where i is a positive integer less than or equal to M;

When the touch chip receives the driving signal from the driving channel adjacent to the ith driving channel and the ith driving channel, the N sensing channels are divided into the K sensing channels. Inductive signals of NK outputs outside the sensing channel;

The NK sensor received by the touch chip when the touch chip outputs a driving signal to the driving channel adjacent to the ith driving channel and the ith driving channel. The sensing signal outputted by the channel detects a touch point on the touch screen.
The method according to claim 18 or 19, wherein the method further comprises:

The touch chip outputs a driving signal to the M driving channels in a next scanning period;

When the touch chip receives the driving signal from the driving chip to the driving channel of each of the M driving channels, the NK sensing channels of the N sensing channels except the K sensing channels Inductive signal output;

The sensing chip outputs the sensing signal output by the N-K sensing channels received by the touch chip when the touch chip outputs a driving signal to the M driving channels, and detects the Touch points on the touch screen.
The method of claim 20, wherein the method further comprises:

When the touch chip detects that the jth driving channel of the M driving channels has a touch point at a corresponding position on the touch screen, the touch chip goes to the jth in the next scanning period. a driving channel and a driving channel adjacent to the jth driving channel among the M driving channels, wherein j is a positive integer less than or equal to MS;

The sensing chip outputs a sensing signal output by the K sensing channels when the touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel and the jth driving channel;

The K sensor receives the K sensor when the touch chip outputs a driving signal to the driving channel adjacent to the jth driving channel and the jth driving channel. The sensing signal outputted by the channel detects a touch point on the touch screen.