CN102541337B - Multi-stage scanning touch position detection device and method - Google Patents

Abstract

A multi-stage scanning touch position detection device and method, the device comprises: a scan line connection circuit for controlling the interconnection configuration between a first scan line group and a second scan line group to plan the equivalent resolution distribution of a sensor, wherein the second scan line group is coupled to the sensor; a touch scanning unit for selecting a portion of scan lines from the first scan line group to detect a staged touch coordinate; and a touch coordinate determination unit having a plurality of working stages, for controlling the scan line connection circuit and the touch scanning unit according to the working stages, and combining the staged touch coordinates detected in each of the working stages.

Description

Multi-stage scanning touch position detection device and method

technical field

The present invention relates to a device and method for a touch display module, in particular to a multi-stage scanning touch position detection device and method for a touch display module.

Background technique

Press, the current touch display module generally uses the X-Y array fixed-frequency scanning method (for example, one of the plurality of Y scanning lines is selected in turn as the power supply end, and one of the plurality of X scanning lines is selected in turn as the receiving end to receive an analog Sensing signal) to detect a touch position. However, when the size of the touch display module becomes larger, that is, when the number of Y scanning lines and X scanning lines becomes larger, the traditional X-Y array scanning method becomes inefficient—the number of pins of the control IC is greatly increased. , and the display screen of the touch display module is easily disturbed by its fixed-frequency touch scanning.

Contents of the invention

The object of the present invention is to provide a multi-stage scanning touch position detection device.

Another object of the present invention is to provide a multi-stage scanning touch position detection method.

In order to achieve the above object, the multi-stage scanning touch position detection device provided by the present invention has:

A scan line connection circuit, used to control the interconnection configuration between a first scan line group and a second scan line group according to a scan line connection control signal, so as to plan an equivalent resolution distribution of a sensor, wherein the The second scan line group is coupled to the sensor;

A touch scanning unit is used to select a part of the scan lines from the first scan line group according to a resolution planning signal to detect a staged touch coordinate, and send the stage by a first coordinate signal coordinates of sexual touching; and

A touch coordinate determining unit, which has a plurality of working stages, is used to: determine the state of the scanning line connection control signal and the state of the resolution planning signal according to the working stage; through the first coordinate signal reading the phased touch coordinates; and combining the phased touch coordinates detected in each of the working phases.

The multi-stage scanning touch position detection device provided by the present invention also has:

A scan line combination circuit for selecting a part of a third scan line group to be connected to a second scan line group according to a scan line combination circuit control signal to select a sub-region from a sensor, wherein the third scan line group a scan line group coupled to the sensor;

A scan line connection circuit, used to control the interconnection configuration between a first scan line group and the second scan line group according to a scan line connection control signal, so as to plan the equivalent resolution distribution of the sub-area;

A touch scanning unit is used to select a part of the scan lines from the first scan line group according to a resolution planning signal to detect a staged touch coordinate, and send the stage by a first coordinate signal coordinates of sexual touching; and

A touch coordinate determining unit has a scanning line combination circuit operation stage and a sub-region scanning stage, wherein the sub-region scanning stage has a plurality of working stages, and the touch coordinate determining unit is used to: operate on the scanning line combination circuit The stage determines the state of the control signal of the scanning line combination circuit and generates a sub-area coordinate; in the sub-area scanning stage, the state of the scanning line connection control signal and the state of the resolution planning signal are determined according to the working stage , and read the phased touch coordinates from the first coordinate signal; and combine the sub-region coordinates with the phased touch coordinates detected in each of the working stages.

In the multi-stage scanning touch position detection device, the sensor is a resistive, capacitive, acoustic or electromagnetic array touch sensor.

In the multi-stage scanning touch position detection device, the equivalent resolution distribution is a uniform distribution or a non-uniform distribution.

In the multi-stage scanning touch position detection device, the touch scanning unit includes an analog-to-digital converter.

In the multi-stage scanning touch position detection device, the scanning line combining circuit is integrated in the sensor in a chip-on-glass manner.

The multi-stage scanning touch position detection method provided by the present invention, the steps include:

Detecting a first coordinate of a touch event of a sensor with a first equivalent resolution distribution;

detecting a second coordinate of the touch event distributed over a local area of the sensor corresponding to the first coordinate with a second equivalent resolution; and

combining the first coordinate and the second coordinate.

The multi-stage scanning touch position detection method provided by the present invention, its steps also include:

selecting a sub-area from a sensor in a sub-area scanning manner, wherein the sub-area corresponds to a sub-area coordinate;

Detecting first coordinates of a touch event in the sub-area with a first equivalent resolution distribution;

detecting second coordinates of the touch event distributed in a local area of the sub-area corresponding to the first coordinates with a second equivalent resolution; and

Combining the sub-region coordinates, the first coordinates, and the second coordinates.

The touch position detection method includes the step of detecting the sensors with 1×1 equivalent resolution distribution.

In the touch position detection method, the first equivalent resolution distribution is a uniform distribution or a non-uniform distribution.

In the touch position detection method, the second equivalent resolution distribution is a uniform distribution or a non-uniform distribution.

The multi-stage scanning touch position detection device provided by the present invention improves the detection efficiency of the touch position, reduces operating power consumption, reduces the number of pins of the control IC, reduces electromagnetic wave interference, and reduces interference to the display screen.

The multi-stage scanning touch position detection method provided by the present invention improves the detection efficiency of the touch position, reduces operating power consumption, reduces the number of pins of the control IC, reduces electromagnetic wave interference, and reduces interference to the display screen.

Description of drawings

FIGS. 1( a ) to 1 ( c ) illustrate conceptual illustrations of detecting a touch position on a touch display module by using multi-stage scanning in the present invention.

2( a ) to 2 ( b ) illustrate conceptual illustrations of coordinate combinations of the present invention.

FIG. 3 is a circuit block diagram of a preferred embodiment of the multi-stage scanning touch position detection device of the present invention.

FIG. 4 is a circuit block diagram of another preferred embodiment of the multi-stage scanning touch position detection device of the present invention.

Detailed ways

The present invention proposes a novel touch position detection mechanism, which can detect a touch position by a multi-stage scanning method, so as to solve the problems faced by the touch display module in the prior art.

The multi-stage scanning touch position detection device provided by the present invention has a scanning line connection circuit, a touch scanning unit, and a touch coordinate determining unit.

The scan line connection circuit is used to control the interconnection configuration between a first scan line group and a second scan line group according to a scan line connection control signal, so as to plan an equivalent resolution distribution of a sensor, wherein the The second scan line group is coupled to the sensor.

The touch scanning unit is used to select a part of scanning lines from the first scanning line group according to a resolution planning signal to detect a staged touch coordinate, and send the stage by a first coordinate signal Sexual touch coordinates.

The touch coordinate determining unit has a plurality of working stages, and it is used to: determine the state of the scanning line connection control signal and the state of the resolution planning signal according to the working stage; through the first The coordinate signal reads the phased touch coordinates; and combines the phased touch coordinates detected in each of the working phases.

Another multi-stage scanning touch position detection device of the present invention has a scan line combination circuit, a scan line connection circuit, a touch scan unit, and a touch coordinate determination unit.

The scan line combination circuit is used for selecting a part of a third scan line group to be connected to a second scan line group according to a scan line combination circuit control signal, so as to select a sub-region from a sensor, wherein the third scan line group A scan line group is coupled to the sensor.

The scan line connection circuit is used to control the interconnection configuration between a first scan line group and the second scan line group according to a scan line connection control signal, so as to plan the equivalent resolution distribution of the sub-region.

The touch scanning unit is used to select a part of scanning lines from the first scanning line group according to a resolution planning signal to detect a staged touch coordinate, and send the stage by a first coordinate signal Sexual touch coordinates.

The touch coordinate determining unit has a scanning line combination circuit operation phase and a sub-area scanning phase, wherein the sub-area scanning phase has a plurality of working phases. The touch coordinate determination unit is used to: determine the state of the control signal of the scan line combination circuit and generate a sub-region coordinate during the operation phase of the scan line combination circuit; The status of the scanning line connection control signal and the status of the resolution planning signal, and reading the phased touch coordinates from the first coordinate signal; The phased touch coordinates detected by the phase.

The multi-stage scanning touch position detection method of the present invention has the following steps:

Step a) Detecting a first coordinate of a touch event of a sensor with a first equivalent resolution distribution.

Step b) detecting the second coordinates of the touch event distributed in a local area of the sensor corresponding to the first coordinates with a second equivalent resolution.

Step c) combining the first coordinate and the second coordinate.

Another multi-stage scanning touch position detection method of the present invention has the following steps:

Step a) Selecting a sub-area from a sensor in a partition scanning manner, wherein the sub-area corresponds to a sub-area coordinate.

Step b) detecting first coordinates of a touch event in the sub-area with a first equivalent resolution distribution.

Step c) detecting the second coordinates of the touch event distributed in a local area of the sub-area corresponding to the first coordinates with a second equivalent resolution.

Step d) combining the sub-region coordinates, the first coordinates, and the second coordinates.

In order to further understand the structure, features and purpose of the present invention, a detailed description will be given in conjunction with the accompanying drawings and preferred specific embodiments.

Please refer to FIGS. 1( a ) to 1 ( c ), which are schematic diagrams illustrating the concept of detecting a touch position on a touch display module by using multi-stage scanning in the present invention. Figure 1a represents stage 1: making the touch display module equivalent to a touch plane with 1×1 resolution and performing touch detection; Figure 1b represents stage 2: making the touch display module equivalent to a 2×2 resolution touch plane and touch detection; Figure 1c represents the third stage: making the touch display module equivalent to a touch plane composed of 4 sub-touch planes with 2×2 resolution , and perform touch detection, wherein, the symbol X appearing in each figure is used to mark a touch event that occurs at the bottom right of the touch display module. After the touch event occurs, the three-stage embodiment of the present invention first detects the touch event through stage one, then detects a first coordinate through stage two, and then detects a second coordinate through stage three , and then determine the touch position of the touch event by combining the first coordinate and the second coordinate.

The aforementioned concept of coordinate combination can be further illustrated by Fig. 2(a)-2(b). As shown in Figure 2(a), the coordinate matrix of the touch plane can be decomposed into the sum of three matrices, in which the first matrix represents the coordinate space of stage 1, and all its coordinate elements are (0, 0); the second matrix Represents the coordinate space of stage 2. The sub-matrix on the upper left is composed of 4 identical elements (0, 0), (0, 0), (0, 0), and (0, 0), and the sub-matrix on the upper right It is composed of 4 identical elements (0, 2), (0, 2), (0, 2), (0, 2), and the lower left sub-matrix is composed of (2, 0), (2, 0) , (2, 0), (2, 0) are composed of 4 identical elements, and the lower right sub-matrix is composed of (2, 2), (2, 2), (2, 2), (2, 2 ) consists of 4 identical elements; and the third matrix represents the coordinate space of stage three, and its upper left, upper right, lower left, and lower right sub-matrices are composed of (0, 0), (0, 1), ( 1,0), (1,1) are composed of four different elements.

The first matrix corresponds to FIG. 1( a ), that is, it represents a touch plane with 1×1 equivalent resolution in such a way that all elements are (0, 0). This second matrix corresponds to Fig. 1(b), that is to say, all elements of the upper left sub-matrix are (0, 0), all elements of the upper right sub-matrix are (0, 2), and the lower left sub-matrix All the elements of the matrix are (2, 0), and all the elements of the lower right sub-matrix are (2, 2) represent a touch plane with 2×2 equivalent resolution. This third matrix is corresponding to Fig. 1 (c), that is to say it is with 4 identical sub-matrices (by (0,0), (0,1), (1,0), (1,1) A total of 4 different elements) represents a touch plane composed of 4 sub-touch planes with 2×2 equivalent resolution.

In Figure 2(b), the relevant coordinates corresponding to the symbol X in Figure 1(a)~1(c) are marked with the bottom line - (2,3) , (0,0) , (2,2) , (0,1) , and the relationship between the relevant coordinates can be expressed as (2,3)=(2,2)+(0,1). That is, when the X touch event is detected with an equivalent resolution of 1×1 through stage one, this embodiment generates the coordinates of (0,0); and then through stage two with an equivalent resolution of 2×2 Scan at a high rate to generate coordinates (2, 2) corresponding to X; after entering stage 3, scan the block detected in stage 2 with an equivalent resolution of 2×2 to generate coordinates (0, 1) corresponding to X ), and then the touch coordinate (2, 3) of the touch event is determined by the combination of (2, 2) and (0, 1).

Generally speaking, it is assumed that a coordinate matrix M _JK has a resolution of J×K, where J and K are both positive integers. If J=N ₁ ×N ₂ is a decomposition mode of J, and K=L ₁ ×L ₂ is a decomposition mode of K, then its resolution can be expressed as N ₁ ×N ₂ ×L ₁ ×L ₂ =(1 ×1)×(N ₁ ×L ₁ )×(N ₂ ×L ₂ ), where N ₁ , N ₂ , L ₁ , and L ₂ are all positive integers. Scanning at a resolution of 1×1—the obtained coordinates are (0,0), scanning at a resolution of N ₁ ×L ₁ —the obtained coordinates are (x ₁ ,y ₁ ), and N ₂ × The resolution of L ₂ scans the sub-block pointed to by (x ₁ , y ₁ ) - the obtained coordinates are (x ₂ , y ₂ ), which can cover any element (x, y) of the coordinate matrix M _JK ),in

x=N ₂ x ₁ +x ₂ , y=L ₂ y ₁ +y ₂ , and

0≤x≤J _- 1 _, 0≤y≤K- _{1, 0≤x1≤N1-1 ,} 0≤y1≤L1-1 _{, 0≤x2≤N2-1,0≤y2} ≤L ₂ -1.

Taking the coordinates (J-1, K-1) of the lower right corner of the coordinate matrix M _JK as an example, the corresponding (x ₁ , y ₁ )=(N ₁ -1, L ₁ -1), (x ₂ , y ₂ )=(N ₂ -1, L ₂ -1), and at this time N ₂ x ₁ +x ₂ =N ₂ (N ₁ -1)+N ₂ -1=N ₁ N ₂ -1=J- 1, and L ₂ y ₁ +y ₂ =L ₂ (L ₁ -1)+L ₂ -1=L ₁ L ₂ -1=K-1.

In the case that both J and K are much greater than 1, the sum of the average detection times of the above-mentioned three-stage scanning will be far less than the average detection times of scanning with J×K resolution, which is proved as follows:

Average number of detections scanned with J×K resolution = (1+2+3+...+JK)/JK=(1+JK)/2=(1+N ₁ L ₁ N ₂ L ₂ )/2; And the sum of the average detection times of the three-stage scanning=1+N ₁ L ₁ /2+N ₂ L ₂ /2=(2+N ₁ L ₁ +N ₂ L ₂ )/2. When both J and K are much greater than 1, (2+N ₁ L ₁ +N ₂ L ₂ )/2 is much smaller than (1+N ₁ L ₁ N ₂ L ₂ )/2. Taking N ₁ =4, L ₁ =5, N ₂ =5, L ₂ =3 as an example, (2+N ₁ L ₁ +N ₂ L ₂ )/2=37/2 is much smaller than (1+N ₁ L ₁ N ₂ L ₂ )/2=301/2.

It is also known that ab=k, a>0, b>0, k is a constant, when a=b, a+b will have a minimum value, so a preferred embodiment of the present invention is to make (N ₁ ×L ₁ ) is as equal to (N ₂ ×L ₂ ) as possible to optimize the sum of the average detection times.

Based on the aforementioned principles, the present invention is applicable to multi-touch applications. Take two simultaneous touches as an example, the two touch coordinates are: (x(1), y(1))=(N ₂ x ₁ (1)+x ₂ (1), L ₂ y ₁ (1) +y ₂ (1)), and (x(2), y(2))=(N ₂ x ₁ (2)+x ₂ (2), L ₂ y ₁ (2)+y ₂ (2)) .

In addition, the present invention can also define the equivalent resolution distribution of the sensor as a non-uniform distribution, for example: in the third stage, the block specified by the second stage is defined as having an equivalent resolution of _N2 × _L2 , while other Blocks not designated by stage 2 have an equivalent resolution of N ₁ ×L ₁ −1, or 1×1, or are not scanned or powered off. Furthermore, the number of stages of the present invention can be adjusted according to needs, for example, the number of stages can be increased when applied to a large-size touch display module, and the number of stages can be reduced when applied to a small-size touch display module.

In addition, the present invention has excellent expandable characteristics, making it especially suitable for super-sized touch applications. The reason is illustrated by the following example:

If the resolution of the touch display module is 2J×2K, and the present invention has constructed a J×K scanning module, it only needs to add a scan line combination circuit capable of partition scanning to realize the 2J×2K touch display module. The plane is divided into upper left (the corresponding coordinates are (0, 0)), upper right (the corresponding coordinates are (0, K)), lower left (the corresponding coordinates are (J, 0)), lower right (the corresponding coordinates are ( J, K)) totally 4 J×K sub-touch planes. At this time, the entire scanning work can be divided into the first stage of generating {(0, 0), (0, K), (J, 0), (J, K)} coordinate space, generating {(0, 0), ...(J-1, K-1)} the second stage of the coordinate space, and adding the coordinates generated in the first stage to the coordinates generated in the second stage to obtain the touch coordinates of the 2J×2K touch plane (its coordinate space is {(0, 0), ... (2J-1, 2K-1)}) coordinate accumulation stage. Taking the bottom right corner of the 2J×2K touch plane as an example, the coordinates generated in the first stage are (J, K), and the coordinates generated in the second stage are (J-1, K-1), And (J, K)+(J-1, K-1)=(2J-1, 2K-1) is indeed equal to the coordinates of the bottom right corner of the 2J×2K touch plane.

According to the foregoing description, the present invention proposes a preferred embodiment, and its circuit block diagram is shown in FIG. 3 . As shown in FIG. 3 , the preferred embodiment includes a touch coordinate determination unit 300 , a scan line connection circuit 310 , a sensor 320 , and a touch scan unit 330 .

The touch coordinate determining unit 300 has a plurality of working stages, which are: controlling the scanning line connection circuit 310 via the scanning line connection control signal S _CON to define the equivalent resolution distribution of each working stage; The signal S _PRGM determines the coordinate space of the touch scanning unit 330 in each of the working stages; the stepwise touch coordinates generated by the touch scanning unit 330 in each of the working stages are read through the first coordinate signal S _COOR1 ; And combine the stepwise touch coordinates to send a touch coordinate via the second coordinate signal S _COOR2 .

The scan line connection circuit 310 is used to form a plurality of interconnections between the _X2 scan line and the _X1 scan line, and between the _Y2 scan line and the _Y1 scan line under the control of the scan line connection control signal S _CON Configure to define the equivalent resolution distribution of the sensor 320 in each of the working stages, such as the aforementioned 1 (1×1), 1 (N ₁ ×L ₁ ), and N ₁ L ₁ (N ₂ ×L ₂ ) scanning space, etc. In addition, the present invention can also define the equivalent resolution distribution of the sensor 320 as a non-uniform distribution, for example: in the third stage, the block designated by the second stage is defined to have an equivalent resolution of _N2 × _L2 , Other blocks not designated by stage 2 have an equivalent resolution of N ₁ ×L ₁ −1 or 1×1, or are not scanned or are powered off.

The sensor 320 is an array touch sensor, which can be a resistive, capacitive, acoustic, or electromagnetic touch sensor. The sensor 320 preferably (but not limited to) obtains a driving power through the Y ₂ scanning line and sends out an analog sensing signal through the X ₂ scanning line. Since the sensing principle of the array touch sensor is already known and not the focus of the present invention, it is not intended to be described in detail here.

The touch scanning unit 330 is used to determine the coordinate space of each working stage according to the resolution planning signal S _PRGM , so as to selectively send the driving power from the part _Y1 scanning line and the part _X1 The scan line receives the analog sensing signal. After the analog sensing signal is converted into a digital signal by an analog-to-digital converter (not shown in the figure), it is used to detect each of the stepwise touch coordinates. After detecting each of the phased touch coordinates, the touch scanning unit 330 sends each of the phased touch coordinates through the first coordinate signal S _COOR1 . In addition, the touch scanning unit 330 can produce a frequency hopping effect due to scanning in stages - each stage has a different scanning frequency. The frequency hopping effect can not only reduce operating power consumption and electromagnetic interference, but also avoid display Other fixed frequency of the module, so as to avoid disturbing the display picture.

In addition, the circuit in FIG. 3 can be applied to a sensor with a larger scanning size only by adding a scanning line combination circuit. Please refer to FIG. 4 for a circuit block diagram of a preferred embodiment. As shown in FIG. 4 , the preferred embodiment includes a touch coordinate determination unit 400 , a scan line connection circuit 410 , a scan line combination circuit 420 , a sensor 430 , and a touch scan unit 440 .

The touch coordinate determining unit 400 has a scanning line combination circuit operation phase and a sub-area scanning phase, wherein the sub-area scanning phase has a plurality of working phases as described in FIG. 3 . The touch coordinate determining unit 400 is: controlling the scan line combination circuit 420 via the scan line combination circuit control signal S _MUX to select one of a plurality of sub-regions of the sensor 430 during the operation phase of the scan line combination circuit, wherein the touch The touch coordinate determining unit 400 presets a sub-area coordinate for each of the sub-areas; the scan line connection circuit 410 is controlled by the scan line connection control signal S _CON so that during the sub-area scanning phase, a sub-area In the area, the equivalent resolution distribution of the sensor 430 in each of the working stages is defined; the coordinate space of the touch scanning unit 440 in each of the working stages is determined through the resolution planning signal S _PRGM ; through the first coordinate signal S _COOR1 reads the stepwise touch coordinates generated _by the touch scanning unit 440 in each of the working stages; Send a touch coordinate.

The scan line connection circuit 410 is used to form a plurality of interconnections between the _X2 scan line and the _X1 scan line, and between the _Y2 scan line and the _Y1 scan line under the control of the scan line connection control signal S _CON Configure to define the equivalent resolution distribution of the sensor 430 in each of the working stages, such as the aforementioned 1 (1×1), 1 (N ₁ ×L ₁ ), N ₁ L ₁ (N ₂ × L ₂ ) scan space, etc. In addition, the present invention can also define the equivalent resolution distribution of the sensor 420 as a non-uniform distribution, for example: in the third stage, the block designated by the second stage is defined as having an equivalent resolution of _N2 × _L2 , Other blocks not designated by stage 2 have an equivalent resolution of N ₁ ×L ₁ −1 or 1×1, or are not scanned or are powered off.

The scanning line combining circuit 420 is controlled by the scanning line combining circuit control signal _SMUX , so that the _X2 scanning line is connected to a part of the _X3 scanning line, and the _Y2 scanning line is connected to a part of the _Y3 scanning line, so that A said sub-region is selected from the sensor 430 .

The sensor 430 is an array touch sensor, which can be a resistive, capacitive, acoustic, or electromagnetic touch sensor. The sensor 430 preferably (but not limited to) obtains a driving power through the _Y3 scanning line and sends out an analog sensing signal through the _X3 scanning line. Since the sensing principle of the array touch sensor is already known and not the focus of the present invention, it is not intended to be described in detail here.

The touch scanning unit 440 is used to determine the coordinate space of each working stage according to the resolution planning signal S _PRGM , so as to selectively send the driving power from the scanning line of the part _Y1 and the scanning line from the part _X1 . The scan line receives the analog sensing signal. After the analog sensing signal is converted into a digital signal by an analog-to-digital converter (not shown in the figure), it is used to detect each of the stepwise touch coordinates. After detecting each of the phased touch coordinates, the touch scanning unit 440 sends each of the phased touch coordinates through the first coordinate signal S _COOR1 .

It should be emphasized that the known high-resolution touch display module uses an IC with a high number of pins, and the number of signals connected to the external connection of the glass machine board is also very large, which is not conducive to the development and production of its products. However, according to the design of FIG. 4 of the present invention, the scanning line combination circuit 420 can be realized in the form of COG (Chip on Glass-chip on glass), or directly integrated on the glass machine board (or soft board), and then use a connecting means (such as a flexible board) is connected to the main control circuit; in addition, through the scan line combination circuit 420, the high-resolution structure can also be simplified, thereby reducing the cost. Furthermore, designing the scan line combination circuit 420 on a sensor board can greatly reduce the number of signal lines connected to the sensor board, thereby improving the anti-noise capability and reducing the difficulty of manufacturing process; and using the scan line combination circuit 420 scanning line combination mode can also support various sizes and resolutions.

1 to 3, the present invention further proposes a multi-stage scanning touch position detection method, the steps of which include: detecting a touch event with a 1×1 equivalent resolution distribution (step a); Detecting a first coordinate with a first equivalent resolution distribution (step b); detecting a second coordinate at a local area corresponding to the first coordinate with a second equivalent resolution distribution (step c); and combining the The first coordinate and the second coordinate to generate a touch coordinate (step d). The principle involved in each step of the method of the present invention has been disclosed in the foregoing description, so it is not repeated here.

Moreover, through the disclosure of the aforementioned FIG. 4 , the present invention further proposes a multi-stage scanning touch position detection method, the steps of which include: detecting a touch event of a sensor with a 1×1 equivalent resolution distribution (step a ); select a sub-area of the sensor in a sub-area scanning manner, wherein the sub-area corresponds to a sub-area coordinate (step b); detect the sub-area with a first equivalent resolution distribution in the sub-area The first coordinate of the touch event (step c); the second coordinate of the touch event is detected in a local area of the sub-region corresponding to the first coordinate with the second equivalent resolution (step d) ; and combining the sub-region coordinates, the first coordinates, and the second coordinates (step e). Since the principle involved in each step of the method of the present invention has been disclosed in the foregoing description, it will not be repeated here.

As can be seen from the detailed description above, the multi-stage scanning touch position detection mechanism of the present invention can not only switch the equivalent resolution distribution of a touch area, but also close the untouched area, and only touch the touched area. Control scanning, analog-to-digital conversion and coordinate calculation, so it can improve touch scanning efficiency and reduce operating power consumption. In addition, because the scan line combination circuit of the present invention can be directly implemented in the sensor and then electrically connected to the core control circuit through a connection means such as a flexible printed circuit board, the present invention is particularly suitable for large-sized, high-precision touch display modules. Furthermore, the setting of the equivalent resolution distribution can cause the capacitive sensor to produce a capacitive parallel effect, and this effect is combined with turning off or reducing the scanning frequency of the untouched area, and changing the scanning frequency under different equivalent resolutions—that is, jumping Frequency, can avoid fixed frequency noise interference, thereby reducing the number of malfunctions.

In summary, the multi-stage scanning touch position detection device and method of the present invention can detect touch positions more efficiently, reduce operating power consumption, reduce the number of pins of the control IC, reduce electromagnetic wave interference, and reduce the impact on the display. interference of the picture, and the device has scalability, which is suitable for the application of large-size touch display modules. Compared with the known touch detection methods, the present invention has breakthrough effects.

The description of the present invention is only a preferred embodiment, and all partial changes or modifications derived from the technical idea of the present invention and easily deduced by those skilled in the art all fall within the scope of the claims of the present invention.

Claims (15)

1. a multi-stage scanning touch position arrangement for detecting, it has:

Scan line connecting circuit, in order to scan the interconnection configuration between line-group according to scan line connection control signal control one first scanning line-group and one second, to plan the equivalent resolution distribution of a sensor, the second wherein said scanning line-group and this sensor couple;

One touching scanning element, in order to select a part of sweep trace to detect one-phase touch coordinate according to a resolution planning signal in the described first scanning line-group, and sends described interim touch coordinate by one first coordinate signal; And

One touch coordinate determining means, has a plurality of working stage, in order to: determine the state of described sweep trace connection control signal and the state of described resolution planning signal according to described working stage; Interim touch coordinate described in reading via the first described coordinate signal; And add up the described interim touch coordinate detected at each described working stage.

2. multi-stage scanning touch position arrangement for detecting according to claim 1, wherein, described sensor is the array touch sensing of resistance-type, condenser type, sound wave type or electromagnetic type.

3. multi-stage scanning touch position arrangement for detecting according to claim 1, wherein, this equivalent resolution distribution is one to be uniformly distributed or a uneven distribution.

4. multi-stage scanning touch position arrangement for detecting according to claim 1, wherein, this touching scanning element comprises an analog-to-digital converter.

5. a multi-stage scanning touch position arrangement for detecting, it has:

Scan line combination circuit, in order to select the some of a three scan line group to be connected to one second scanning line-group according to scan line combination circuit control signal, to select a subregion from a sensor, wherein this three scan line group and this sensor couple;

Scan line connecting circuit, in order to scan the interconnection configuration between line-group according to scan line connection control signal control one first scanning line-group and described second, to plan the equivalent resolution distribution of this subregion;

One touching scanning element, in order to select a part of sweep trace to detect one-phase touch coordinate according to a resolution planning signal in the described first scanning line-group, and sends described interim touch coordinate by one first coordinate signal; And

One touch coordinate determining means, there is scan line combination circuit operation stage and a subregion sweep phase, wherein this subregion sweep phase has a plurality of working stage, this touch coordinate determining means in order to: this scan line combination circuit operation stage determine described scan line combination circuit control signal state and produce a subregion coordinate; The state of described sweep trace connection control signal and the state of described resolution planning signal is determined according to described working stage at this subregion sweep phase, and the interim touch coordinate described in reading from the first described coordinate signal; And the described interim touch coordinate adding up this subregion coordinate and detect at each described working stage.

6. multi-stage scanning touch position arrangement for detecting according to claim 5, wherein, described sensor is the array touch sensing of resistance-type, condenser type, sound wave type or electromagnetic type.

7. multi-stage scanning touch position arrangement for detecting according to claim 5, wherein, this equivalent resolution distribution is one to be uniformly distributed or a uneven distribution.

8. multi-stage scanning touch position arrangement for detecting according to claim 5, wherein, this touching scanning element comprises an analog-to-digital converter.

9. multi-stage scanning touch position arrangement for detecting according to claim 5, wherein, this scan line combination circuit is integrated in this sensor in the mode of glass flip chip.

10. a multi-stage scanning touch position method for detecting, its step comprises:

With the first coordinate of a touch event of the first equivalent resolution distribution detecting one sensor;

The regional area being distributed in the described sensor corresponding with this first coordinate with the second equivalent resolution detects the second coordinate of this touch event; And

Add up this first coordinate and this second coordinate.

11. touch position method for detecting according to claim 10, wherein, comprise with the step of the described sensor of equivalent resolution distribution detecting of 1 × 1.

12. 1 kinds of multi-stage scanning touch position method for detecting, its step comprises:

Select a subregion in the mode of a subarea-scanning from a sensor, wherein said subregion corresponds to a subregion coordinate;

With the first coordinate of the described subregion one touch event of the first equivalent resolution distribution detecting;

The regional area being distributed in the described subregion corresponding with this first coordinate with the second equivalent resolution detects the second coordinate of this touch event; And

Add up this subregion coordinate, this first coordinate and this second coordinate.

13. touch position method for detecting according to claim 12, wherein, comprise with the step of the described sensor of equivalent resolution distribution detecting of 1 × 1.

14. touch position method for detecting according to claim 12, wherein, this first equivalent resolution is distributed as one and is uniformly distributed or a uneven distribution.

15. touch position method for detecting according to claim 12, wherein, this second equivalent resolution is distributed as one and is uniformly distributed or a uneven distribution.