CN109933244B - Touch screen sensor for large-size touch screen and touch identification method - Google Patents
Touch screen sensor for large-size touch screen and touch identification method Download PDFInfo
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Abstract
The invention provides a touch screen sensor for a large-size touch screen and a touch identification method, wherein the method comprises the following steps: the touch IC collects the area induction quantity of the area induction electrode and the coordinate induction quantity of the coordinate induction electrode in real time; judging whether touch occurs according to the area induction quantity and the coordinate induction quantity; if the touch occurs, judging the area where the touch occurs according to the area induction quantity, and calculating the position coordinate of the touch according to the coordinate induction quantity; the method has the advantages that the coordinate calculation is carried out in a mode of combining the area identification and the coordinate identification, the touch position can be accurately identified, the position coordinate is obtained, the method is simple, the reliability is high, and the overall cost can be reduced.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a touch screen sensor for a large-size touch screen and a touch identification method.
Background
At present, the market demands for large-size display touch schemes are increased, according to the conventional design scheme in the industry, a 5.5-inch universal mobile phone screen touch scheme is provided, the number of capacitive channels is M + N (M is the number of driving electrodes, and N is the number of sensing electrodes), each driving electrode and each sensing electrode need to be connected to one pin on a touch IC (touch chip), generally, N in the design scheme of a 5.5-inch screen is greater than 12, taking M =24 and N =13 as an example, if the length of a single direction of the touch screen, such as the length in a transverse direction or a longitudinal direction, is increased by one time, the number of channels in the direction is also increased by one time, assuming that the number N =13 of sensing electrodes is increased by one time, to 26, the total number of channels is increased to 50, the package external dimension of the touch IC with 50 electrode pins in the industry needs to be more than 7 × 7mm, the wafer cost, the package cost, and the physical space occupied by the device are correspondingly increased, so that the development cost of the touch IC is increased, and more physical space is occupied.
Disclosure of Invention
The invention aims to provide a touch screen sensor and a touch identification method for a large-size touch screen, aiming at the problems of the prior art that the touch IC pins are increased, the occupied space is large and the cost is increased due to the increase of the size of the touch screen, and the problems can be effectively solved.
In order to solve one of the above technical problems, the present invention provides a touch screen sensor for a large-sized touch screen, including a touch IC, a first electrode layer and a second electrode layer, wherein the first electrode layer is divided into N regions, and the first electrode layer includes a plurality of first electrodes for calculating a touch position and first region electrodes for identifying a touch region;
the first area electrode is inserted between the first electrodes;
the first area electrodes are respectively connected to pins of the touch IC through first signal lines, and the first area electrodes in the same area are connected to the same pins;
the first electrodes in each area are sequentially numbered, and N first electrodes with the same number in N areas are connected to the same corresponding pin of the touch IC through a second signal line;
the touch IC is used for acquiring the area induction quantity of the first area electrode and the coordinate induction quantity of the first electrode in real time, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity, and if touch occurs, judging the area where touch occurs according to the area induction quantity and calculating the position coordinate of touch according to the coordinate induction quantity.
Further, the second electrode layer is divided into W areas, the second electrode layer includes a plurality of second electrodes for sensing a touch position and second area electrodes for identifying the touch area, and a value range of W is 2 to 10.
Further, the first electrode layer is an induction electrode layer and the second electrode layer is a driving electrode layer; or the first electrode layer is a driving electrode layer and the second electrode layer is an induction electrode layer.
Further, the value range of N is 2-10.
Further, the first electrode layer is an induction electrode layer and the second electrode layer is a driving electrode layer; the number of the coordinate sensing electrodes in each area of the sensing electrode layer is the same, or the number of the coordinate sensing electrodes in each area of the sensing electrode layer is different.
Further, the driving electrode layer comprises a plurality of driving electrodes, the plurality of driving electrodes are regularly arranged along a first direction, the plurality of coordinate sensing electrodes are regularly arranged along a second direction, and the first direction is vertical to the second direction;
the plurality of driving electrodes are respectively connected to pins of the touch IC through third signal lines;
the driving electrode layer and the sensing electrode layer are arranged in different layers.
On the other hand, a touch recognition method is provided, which is applied to the touch screen sensor, wherein the first electrode layer is an induction electrode layer and the second electrode layer is a driving electrode layer; the method comprises the following steps:
the touch IC collects the area induction quantity of the area induction electrode and the coordinate induction quantity of the coordinate induction electrode in real time;
judging whether touch occurs according to the area induction quantity and the coordinate induction quantity;
and if the touch occurs, judging the area where the touch occurs according to the area induction quantity and calculating the position coordinate of the touch according to the coordinate induction quantity.
Further, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity comprises the following steps:
comparing and calculating the area induction quantity and the area reference quantity when no touch occurs to obtain an area variation quantity;
comparing and calculating the coordinate induction quantity and the coordinate reference quantity when no touch occurs to obtain a coordinate variation quantity;
and if the area variation is larger than a preset area induction threshold value and the coordinate variation is larger than a preset coordinate induction threshold value, determining that the touch occurs, wherein the area where the area induction electrode with the area variation larger than the preset area induction threshold value is located is the area where the touch occurs.
Further, if the area variation of the two area sensing electrodes is greater than the preset area sensing threshold, comparing the area variation of the two area sensing electrodes, and determining the area where the area sensing electrode with the greater area variation is located as the area where the touch occurs.
Further, calculating location coordinates of the touch, comprising:
calculating to obtain an average pixel quantity according to the pixel value in the vertical direction of the coordinate sensing electrode and the area width proportion;
assigning the average pixel amount to each coordinate sensing electrode;
calculating an initial coordinate by adopting a gravity center algorithm according to the coordinate induction quantity and the pixel quantity of the touched coordinate induction electrode;
and calculating the horizontal coordinate offset according to the area where the touch occurs and the area width proportion, and calculating the coordinate of the touch position according to the horizontal coordinate offset.
Further, the abscissa of the touch position is calculated by the following formula:
X’= X + D’；
where X is the abscissa of the initial coordinate, X 'is the abscissa of the touched position, and D' is the abscissa offset of the corresponding region.
One embodiment provides a touch screen sensor for a large-sized touch screen, including a touch IC, a sensing electrode layer and a driving electrode layer, wherein the sensing electrode layer is divided into N regions, and the sensing electrode layer includes a plurality of coordinate sensing electrodes for sensing a touch position and a region sensing electrode for identifying a touch region;
the regional induction electrodes are respectively connected to pins of the touch IC through first signal lines, and the regional induction electrodes in the same region are connected to the same pin;
the coordinate sensing electrodes in each area are sequentially numbered, and N coordinate sensing electrodes with the same number in N areas are connected to the same corresponding pin of the touch IC through a second signal line;
the touch IC is used for acquiring the area induction quantity of the area induction electrode and the coordinate induction quantity of the coordinate induction electrode in real time, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity, judging the area where the touch occurs according to the area induction quantity if the touch occurs, and calculating the coordinate of the touch position according to the coordinate induction quantity.
Herein, the "large-sized touch screen" refers to a touch screen of 6 inches or more. In some specific application examples, the "large-size touch screen" particularly refers to a touch screen of 10 inches or more. Wherein, 6 inches touch screen means that the diagonal of the screen of the touch screen is 6 inches long.
The touch screen sensor for the large-size touch screen and the touch identification method provided by the invention at least have the following beneficial effects: (1) the touch screen is subjected to regional identification by the mode of setting the regional induction electrodes, and the method is applied to the large-size touch screen, can reduce the number of pins of the touch IC connected with the coordinate induction electrodes, reduce the volume of the touch IC, save the space, reduce the production cost and reduce the overall cost; (2) the method has the advantages that the coordinate calculation is carried out in a mode of combining the area identification and the coordinate identification, the touch position can be accurately identified, the position coordinate is obtained, the method is simple, and the reliability is high. (3) The method can realize that the mobile phone IC with less channels drives the touch screen with large size without redeveloping the touch IC, and simultaneously keeps the precision unaffected. In short, the invention provides a technical scheme of channel multiplexing, and a small IC can support a large screen.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a touch screen sensor for a large-size touch screen according to the present invention, which shows an embodiment in which the number of coordinate sensing electrodes is uniformly distributed in each area, wherein the number of coordinate sensing electrodes in each of three areas ABC is 13;
fig. 2 is a schematic structural diagram of a touch screen sensor for a large-size touch screen in an application scenario, which shows a wiring relationship among a touch IC, a coordinate sensing electrode, a region sensing electrode, and a driving electrode;
FIG. 3 is a schematic diagram of another embodiment of a touch screen sensor for a large-size touch screen according to the present invention;
FIG. 4 is a flowchart of an embodiment of a touch recognition method provided by the present invention;
FIG. 5 is a schematic diagram of a capacitive field when no touch occurs in the touch recognition method according to the present invention;
fig. 6 is a schematic diagram of an induction amount when no touch occurs in the touch recognition method provided by the present invention;
FIG. 7 is a schematic diagram illustrating a capacitance field when a touch occurs in the touch recognition method provided by the present invention;
fig. 8 is a schematic diagram of an induction amount when a touch occurs in the touch recognition method provided by the present invention;
fig. 9 is a schematic structural diagram of another application scenario of the touch screen sensor for a large-size touch screen according to the present invention, which shows an embodiment in which the number of coordinate sensing electrodes in each area is non-uniformly distributed, wherein the number of coordinate sensing electrodes in three areas JKL is sequentially 12,12, and 13;
fig. 10 is an exploded schematic view of another embodiment of a touch screen sensor for a large-size touch screen according to the present invention, in which the sensing electrode layer is divided into three regions, i.e., a first region M, a second region N, and a third region O, and the driving electrode layer is divided into two regions, i.e., a fifth region P and a sixth region Q;
FIG. 11 is a plan view of an induction electrode layer of the touch screen sensor of FIG. 10 for a large-sized touch screen;
FIG. 12 is a plan view of a driving electrode layer of the touch screen sensor for a large-sized touch screen of FIG. 10;
FIG. 13 is a plan view of the touch screen sensor of FIG. 10 for a large-size touch screen;
fig. 14 is a schematic diagram for explaining division of a touch screen VA (View area);
description of reference numerals: touch IC-100; a coordinate sensing electrode-101; a regional sense electrode-102; a drive electrode-103; region identification electrode-104.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1 and 2, the present embodiment provides a touch screen sensor for a large-sized touch screen, including a touch IC100, a sensing electrode layer divided into N areas, and a driving electrode layer, the sensing electrode layer including a plurality of coordinate sensing electrodes 101 for sensing a touch position and area sensing electrodes 102 for recognizing a touch area;
the area sensing electrodes 102 are respectively connected to pins of the touch IC100 through first signal lines, and the area sensing electrodes 102 located in the same area are connected to the same pin;
the coordinate sensing electrodes 101 in each region are sequentially numbered, and the N coordinate sensing electrodes 101 with the same number in the N regions are connected to the same corresponding pin of the touch IC100 through a second signal line;
the touch IC is used for acquiring the area induction quantity of the area induction electrode 102 and the coordinate induction quantity of the coordinate induction electrode 101 in real time, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity, judging the area where the touch occurs according to the area induction quantity if the touch occurs, and calculating the position coordinate of the touch according to the coordinate induction quantity. In other words, the position coordinates of the touch are calculated according to the coordinate induction quantity, and the area where the touch occurs is judged by combining the area induction quantity, so that coordinate positioning is performed together.
The touch screen sensor of the embodiment is a sensor of a mutual-capacitance touch screen. The induction electrode layer and the driving electrode layer are arranged in two layers, namely the induction electrode layer and the driving electrode layer are arranged on different layers.
Specifically, the present embodiment is described by taking as an example that three regions are divided and the areas of the three regions are the same.
Referring to fig. 1 and 2, the coordinate sensing electrodes 101 in each area are numbered sequentially, and 3 coordinate sensing electrodes 101 with the same number in 3 areas are connected to the same pin of the touch IC100 through a second signal line.
Specifically, the sensing electrode layer is divided into three regions, namely a first region a, a second region B and a third region C, 13 coordinate sensing electrodes are arranged in each region, the numbers are RX1 and RX2 … … RX13 respectively, the coordinate sensing electrodes with the same number are connected to the same pin of the touch IC100 through a second signal line, that is, RX1 in the 3 regions are connected to the same pin of the touch IC100, and so on.
The area sensing electrodes 102 are interposed between the coordinate sensing electrodes, the area sensing electrodes in the same area are connected to the same pin on the touch IC, for example, all the area sensing electrodes 102 in the first area a are connected to the same pin on the touch IC as RX14, all the area sensing electrodes in the second area B are connected to the same pin on the touch IC as RX15, and all the area sensing electrodes in the third area C are connected to the same pin of the touch IC as RX 16.
The picture of the sensor that this embodiment provided transversely includes 39 coordinate sensing electrodes, according to traditional scheme, needs correspond to be connected to 39 pins, adopts the scheme that this embodiment provided, only needs 13 pins to connect coordinate sensing electrode, and regional sensing electrode is connected to 3 pins, and 16 pins can satisfy the demand altogether, and touch-control IC's pin quantity has significantly reduced, and then has reduced touch-control IC's size, reduction in production cost.
Through the arrangement, channels among the touch IC, the coordinate induction electrodes, the area induction electrodes and the driving electrodes are ingeniously multiplexed, and the touch of a display screen of more than 10 inches can be controlled by using the mobile phone touch IC.
Further, the number of the regions may be set according to the size of the actual touch screen, and as a preferred embodiment, the value range of N is 2 to 10.
Further, the areas of the respective regions may be the same or different, and in a preferred embodiment, the areas of the respective regions are the same, and calculating the coordinates by using the centroid algorithm requires averaging pixels to each coordinate sensing electrode, so that the areas of the respective regions are the same, thereby simplifying the calculation.
Further, referring to fig. 3, the driving electrode layer includes a plurality of driving electrodes 103, the plurality of driving electrodes 103 are regularly arranged along a first direction, the plurality of coordinate sensing electrodes 101 are regularly arranged along a second direction, and the first direction is perpendicular to the second direction; the first direction is the lateral direction as shown in the figure, the second direction is the longitudinal direction as shown in the figure,
the plurality of driving electrodes 103 are respectively connected to pins of the touch IC through third signal lines;
the driving electrode layer and the sensing electrode layer are arranged in different layers.
The working principle of the touch screen sensor provided by the embodiment is as follows:
if a touch occurs in any one area, for example, the coordinate sensing electrode RX1 in any one area is touched, the pins corresponding to the touch IC can receive the sensing quantity, and then it is determined which area has touched through the sensing quantity of the area sensing electrode, after the area is determined, an initial coordinate is calculated by using a gravity center algorithm according to the sensing quantity and the pixel quantity, and then the calculated initial coordinate is calculated by adding the corresponding offset to the abscissa according to the area where the touch is located, so as to obtain the position coordinate of the touch.
If the touch happens to be at the junction of the two areas, the corresponding two area sensing electrodes can feel the touch, at the moment, the sensing quantities of the two area sensing electrodes are compared, and the area where the area sensing electrode with the larger sensing quantity is located is selected as the touch area to be calculated.
Please refer to example two for a specific method.
According to the precision requirement in the industry, when designing the sensor of the mutual capacitance touch screen, the coordinate positioning is carried out according to the sensitivity induced by the nodes, the sensor is designed by dividing the VA area of the touch screen into a plurality of rows and a plurality of columns, the unit of which each row and each column are intersected is called as a node, and when designing the area of the node, the X/Y length interval of the node is 5mm-9 mm. As shown in fig. 14, X is 5mm and Y is 6mm, so if only TX 24 and RX16 are used in an IC, the maximum supportable area of the node for normal performance is TX 9mm =24 mm = 9=216mm in the X direction (the rectangular length direction); the Y direction (width direction of rectangle) RX 9mm =16 mm 9=144mm, and the corresponding dimension is about 10.2 inches at the maximum. It should be noted that fig. 14 is only schematic, and 24 TX and 16 RX are not provided in fig. 14. However, there is actually a demand for more touch screens of 10.2 inches or more, and if the same accuracy requirement is achieved, the number of channels can only be increased, and ICs are newly developed, which increases the IC cost. However, according to the above description, the present embodiment can solve this technical problem.
The touch screen sensor for the large-size touch screen provided by the embodiment can be used for identifying the touch screen in different areas by setting the area sensing electrodes, is applied to the large-size touch screen, can reduce the number of pins for connecting the touch IC with the coordinate sensing electrodes, reduces the size of the touch IC, saves space, reduces production cost and can reduce overall cost.
Example two
Referring to fig. 4, the present embodiment provides a touch recognition method applied to a touch screen sensor according to the first embodiment, in particular, the method includes:
step S201, a touch IC collects area induction quantity of the area induction electrode and coordinate induction quantity of the coordinate induction electrode in real time;
step S202, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity;
step S203, if touch occurs, judging the area where the touch occurs according to the area induction quantity, and calculating the position coordinate of the touch according to the coordinate induction quantity.
Specifically, step S201 is executed, the touch IC collects the area sensing amount of the area sensing electrode and the coordinate sensing amount of the coordinate sensing electrode in real time, referring to fig. 5 and 6, fig. 5 is the distribution of the capacitance field when no touch occurs, a relatively stable state is formed between each node driving electrode TX and the sensing electrode RX, the sensing amount when no touch occurs is Raw-cap0, TQ is a preset area sensing threshold, and TS is a preset coordinate sensing threshold.
Referring to fig. 7 and 8, when a touch occurs, the finger will suck a part of the magnetic lines of the capacitive field (see the dotted line in the figure), and the induction amount after the touch becomes small as Raw-cap 1.
Further, step S202 is executed, and whether a touch occurs is determined according to the area induction quantity and the coordinate induction quantity, which specifically includes:
step S2021, comparing and calculating the area induction quantity and the area reference quantity when no touch occurs to obtain an area variation quantity;
step S2022, comparing and calculating the coordinate induction quantity and the coordinate reference quantity when no touch occurs to obtain a coordinate variation quantity;
step S2023, if the area variation is greater than a preset area sensing threshold and the coordinate variation is greater than a preset coordinate sensing threshold, determining that a touch has occurred.
The variation is the difference between the sensing quantity of no touch, which is Raw-cap0, and the sensing quantity of touch, which is Raw-cap 1. And when the area variation is larger than a preset area induction threshold and the coordinate variation is larger than a preset coordinate induction threshold, determining that the touch occurs. For example, in some application examples, the preset area sensing threshold and the preset coordinate sensing threshold are 30% -60% of the maximum sensing amount of the finger touch. In other application examples, the preset area sensing threshold and the preset coordinate sensing threshold are 20% -80% of the maximum sensing amount of the finger touch.
Further, the area where the area sensing electrode with the area variation larger than the preset area sensing threshold is located is the area where the touch occurs. Taking the sensor provided in the first embodiment as an example, if the first area a is touched, the area variation collected by the pin connected to the area sensing electrode RX14 is greater than the preset area threshold, and the second area B and the third area C are the same.
Further, if the finger just presses the border between the two areas, the corresponding two area sensing coordinates can be sensed, namely, the area variation of the two area sensing electrodes is larger than the preset area sensing threshold value, at the moment, the two area variation values are compared, and the area where the area sensing electrode with the larger area variation value is located is determined to be the area where the touch occurs. If a finger is pressed on the boundary between the first area a and the second area B, both the area sensing electrodes RX14 and RX15 can sense the change amount of the two areas, and the area where the area sensing electrode with the larger change amount of the area is located is selected as the area where the touch occurs.
Further, after determining the area where the touch is located, calculating the position coordinates of the touch, specifically including:
calculating to obtain an average pixel quantity according to the pixel value in the vertical direction of the coordinate sensing electrode and the area width proportion;
assigning the average pixel amount to each coordinate sensing electrode and area sensing electrode;
calculating an initial coordinate by adopting a gravity center algorithm according to the coordinate induction quantity and the pixel quantity of the touched coordinate induction electrode;
and calculating the horizontal coordinate offset according to the area where the touch occurs and the area width proportion, and calculating the position coordinate of the touch according to the horizontal coordinate offset.
In the above embodiment, the pixels are equally distributed to each of the coordinate sensing electrodes in the respective areas. In alternative embodiments, however, pixels are allocated to each coordinate sensing electrode within an area in an unequal manner, in other words, the width of each coordinate sensing electrode may not be the same.
Further, the abscissa of the touched position is calculated by the following formula (1):
X’= X + D’ （1）；
wherein, X is the abscissa of the initial coordinate, namely the actually obtained coordinate, X 'is the abscissa of the touched position, namely the reported coordinate, and D' is the abscissa offset of the corresponding area. D' is an abscissa offset amount corresponding to an area where the touch occurs.
In this embodiment, the number of coordinate sensing electrodes is uniformly distributed in each region, where the number of coordinate sensing electrodes in three regions ABC is 13, the areas of the three regions ABC are the same, and the pixel amounts are the same, so that the abscissa of the touched position can also be calculated by the following formula:
X’= X + （Q * i）（2）；
wherein, X is the abscissa of the initial coordinate, namely the actually obtained coordinate, X' is the abscissa of the touched position, namely the reported coordinate, Q is the average pixel quantity, Q i is the abscissa offset, and i is 0,1, 2. As described later, Q is 640.
Referring to table 1, assuming that a horizontal pixel is 1920, three regions are divided, and the areas of the three regions are the same, 1920/3=640, and an average pixel amount is 640, the average pixel amount is allocated to each coordinate sensing electrode, and the pixel amount is allocated as follows:
| RX1 | RX2 | RX3 | RX4 | RX5 | RX6 | RX7 | RX8 | RX9 | RX10 | RX11 | | RX13 | RX14 | |
| 0 | 49 | 98 | 148 | 197 | 246 | 295 | 345 | 394 | 443 | 492 | 542 | 591 | 640 |
TABLE 1
In other words, the first area a has a trigger, and the reported coordinate = the actually obtained coordinate. And triggering the second area B, and reporting the coordinate = to actually obtain the coordinate + offset 640 x 1. And triggering the third area C, and reporting the coordinate = the actually obtained coordinate + offset 640 x 2.
According to the pixel quantity and the induction quantity of each coordinate induction electrode, a gravity center algorithm is adopted to calculate and obtain an initial coordinate, and the gravity center algorithm is an algorithm commonly used in the touch control technical field and is well known by persons skilled in the art, and is not described herein again. If the touch occurs in the first area, the calculated initial coordinate is the position coordinate of the actual touch, if the touch occurs in the second area, the abscissa of the calculated initial coordinate plus the offset 640 x1 is the position coordinate of the actual touch, if the touch occurs in the third area, the abscissa of the calculated initial coordinate plus the offset 640 x2 is the position coordinate of the actual touch, and the ordinate of the actual touch position is the same as the ordinate of the calculated initial coordinate.
The touch identification method provided by the embodiment adopts a mode of combining area identification and coordinate identification, can accurately identify the touch position and obtain the position coordinate, and is simple and high in reliability.
EXAMPLE III
Next, a touch panel sensor according to a third embodiment of the present invention will be described with reference to fig. 9. Unless otherwise specified, the configuration of the touch screen sensor according to the third embodiment is the same as the configuration described with reference to fig. 1 to 8 in the first embodiment. Hereinafter, the configuration of the touch panel sensor according to the third embodiment, which is different from that of the first embodiment, will be mainly described, and the same configuration as that of the touch panel sensor according to the first embodiment will be omitted.
Referring to fig. 9, the present embodiment provides a touch screen sensor for a large-size touch screen, and different from the first embodiment, a sensing electrode of the touch screen sensor provided in the present embodiment is divided into three regions, the first region and the second region have the same area, the third region has an area different from that of the first region and the second region, 12 coordinate sensing electrodes are respectively disposed in the first region and the second region, 13 coordinate sensing electrodes are disposed in the third region, the coordinate sensing electrodes with the same number in the three regions are connected to the same pin of a touch IC, and the 13 th coordinate sensing electrode in the third region is separately connected to one pin of the touch IC.
Assuming that the width ratio of the three regions is 3:3:4, the horizontal pixels are 1920, the abscissa offset of the first region is 0, the abscissa offset of the second region is 1920 × 3/(3+3+4) =570, and the abscissa offset of the third region is 1920 × (3+ 3)/(3 +3+4) =1140, the initial coordinates are obtained by calculation, and then the abscissa offset is added to the region where the touch is located, so that the touch position abscissa can be obtained.
Example four
Next, a touch panel sensor according to a fourth embodiment of the present invention will be described with reference to fig. 10 to 13. In addition, unless otherwise specified, the configuration of the touch screen sensor according to the fourth embodiment is the same as the configuration described with reference to fig. 1 to 8 in the first embodiment. Hereinafter, the configuration of the touch panel sensor according to the fourth embodiment, which is different from that of the first embodiment, will be mainly described, and the same configuration as that of the touch panel sensor according to the first embodiment will be omitted.
On the basis of the first embodiment, the driving electrode layer may be divided into W areas, W is greater than or equal to 2, and the driving electrode layer includes a plurality of driving electrodes for sensing a touch position and area recognition electrodes for recognizing a touch area.
Specifically, referring to fig. 10 to 13, the sensing electrode layer is divided into three regions, namely a first region M, a second region N and a third region O, each of the first region M, the second region N and the third region O is provided with 13 coordinate sensing electrodes, which are respectively numbered RX1 and RX2 … … RX13, the coordinate sensing electrodes with the same number are connected to the same pin of the touch IC100 through a second signal line, that is, RX1 in 3 regions is connected to the same pin of the touch IC100, and so on.
The driving electrode layer is divided into two regions, namely a fifth region P and a sixth region Q, 13 driving electrodes are respectively arranged in the fifth region P and the sixth region Q, the numbers are TX1 and TX2 … … TX13, the driving electrodes with the same number are connected to the same pin of the touch IC100 through signal lines, that is, TX1 in 2 regions is connected to the same pin of the touch IC100, and so on.
The area sensing electrodes 102 are interposed between the coordinate sensing electrodes, the area sensing electrodes in the same area are connected to the same pin on the touch IC, for example, all the area sensing electrodes 102 in the first area a are connected to the same pin on the touch IC as RX14, all the area sensing electrodes in the second area B are connected to the same pin on the touch IC as RX15, and all the area sensing electrodes in the third area C are connected to the same pin of the touch IC as RX 16.
Similarly, on the fifth region P and the sixth region Q of the driving electrode layer, region identification electrodes (not numbered) are interposed between the driving electrodes, the region identification electrodes in the same region are connected to the same pin on the touch IC, for example, all the region identification electrodes in the fifth region P are connected to the same pin on the touch IC as TX16, and all the region identification electrodes in the sixth region Q are connected to the same pin on the touch IC as TX 15.
The sensor that this embodiment provided includes 39 coordinate sensing electrodes, 26 drive electrodes, according to traditional scheme, need correspond to be connected to 65 pins, adopt the scheme that this embodiment provided, only need 13 pins to connect coordinate sensing electrodes, 3 regional sense electrodes are connected to the pin, 13 drive electrodes of drive electrode layer are connected to the pin, 2 regional discernment electrodes of drive electrode layer are connected to the pin, totally 31 pins can satisfy the demand, touch IC's pin quantity has significantly reduced, and then touch IC's size has been reduced, and production cost is reduced.
Through the arrangement, channels among the touch IC, the coordinate induction electrodes, the area induction electrodes and the driving electrodes are ingeniously multiplexed, and the touch of a display screen of more than 10 inches can be controlled by using the mobile phone touch IC.
Further, the areas of the respective regions may be the same or different, and in a preferred embodiment, the areas of the respective regions are the same, and calculating the coordinates by using the centroid algorithm requires averaging pixels to each coordinate sensing electrode, so that the areas of the respective regions are the same, thereby simplifying the calculation.
Compared with the first embodiment, the touch screen sensor of the present embodiment can reduce the pin count of the touch IC.
The second embodiment has described the calculation principle and formula of the abscissa of the touch position, and the ordinate of the actual touch position in the second embodiment is the same as the ordinate of the initial coordinate obtained by calculation. In this embodiment, the ordinate of the touch position needs to calculate the ordinate offset according to the area where the touch occurs and the area height ratio, and the principle is similar to the calculation principle and formula of the abscissa of the touch position described in the second embodiment.
In this embodiment, the number of driving electrodes is uniformly distributed in each region, where the number of driving electrodes in the fifth region P and the sixth region Q is 13, the areas of the fifth region P and the sixth region Q are the same, and the pixel number is the same, so that the ordinate of the touched position can also be calculated by the following formula (3):
Y’= Y + （U * i）（3）；
y is an abscissa of the initial coordinate, that is, an actually obtained coordinate, Y' is an abscissa of the touched position, that is, a reported coordinate, U is an average pixel amount, U × i is an abscissa offset, and i is 0 and 1. As described later, U is 540.
Assuming that the vertical pixel is 1080, 2 regions are divided, and the areas of the 2 regions are the same, 1080/2=540 and the average pixel amount is 540, the average pixel amount is assigned to each drive electrode.
According to the pixel quantity and the induction quantity of each driving electrode, a gravity center algorithm is adopted to calculate and obtain an initial coordinate, and the gravity center algorithm is an algorithm commonly used in the touch control technical field and is well known by persons skilled in the art, and is not described herein again. If the touch occurs in the fifth region P, the calculated initial coordinate is the position coordinate of the actual touch, and if the touch occurs in the sixth region Q, the calculated ordinate of the initial coordinate plus the offset 540 × 1 is the position coordinate of the actual touch.
Thereby, the abscissa of the actual touch position and the ordinate of the actual touch position can be obtained.
EXAMPLE five
According to another embodiment, there is provided a touch screen sensor for a large-sized touch screen, including a touch IC, a first electrode layer divided into N regions, the first electrode layer including a plurality of first electrodes for calculating a touch position and first region electrodes for recognizing a touch region;
the first area electrodes are respectively connected to pins of the touch IC through first signal lines, and the first area electrodes in the same area are connected to the same pins;
the first electrodes in each area are sequentially numbered, and N first electrodes with the same number in N areas are connected to the same corresponding pin of the touch IC through a second signal line;
the touch IC is used for acquiring the area induction quantity of the first area electrode and the coordinate induction quantity of the first electrode in real time, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity, and if touch occurs, judging the area where touch occurs according to the area induction quantity and calculating the position coordinate of touch according to the coordinate induction quantity.
The first area electrode is interposed between the first electrodes. The "first area electrode is interposed between the first electrodes" includes at least two cases. In the first case, as shown in fig. 1, the first area electrode (area sensing electrode 102) is inserted inside the first electrode (coordinate sensing electrode 101), and in the second case, as shown in fig. 2, the first area electrode (numbered RX14, RX15, RX16, respectively) is inserted between the adjacent first electrodes (numbered RX1, RX2 … …, RX13, respectively).
Among them can be so: the second electrode layer is divided into W areas, and the second electrode layer comprises a plurality of second electrodes for sensing touch positions and second area electrodes for identifying touch areas.
Among them can be so: the first electrode layer is an induction electrode layer, and the second electrode layer is a driving electrode layer. Or it may be such that: the first electrode layer is a driving electrode layer, and the second electrode layer is an induction electrode layer.
The first embodiment describes the case where the first electrode layer is a sense electrode layer and the second electrode layer is a drive electrode layer, but this may be the case: the first electrode layer is a driving electrode layer, and the second electrode layer is an induction electrode layer.
In some alternative embodiments, the first electrode layer is a driving electrode layer, the second electrode layer is a sensing electrode layer, the first electrode layer is divided into N regions, and the second electrode layer is not divided into regions.
In some other alternative embodiments, the first electrode layer is a driving electrode layer, the second electrode layer is an induction electrode layer, the first electrode layer is divided into N regions, and the second electrode layer is divided into W regions.
The principles of the touch recognition method using the first electrode layer and the second electrode layer may be referred to in the second embodiment and the fourth embodiment.
Wherein, the value range of W and N is preferably 2-10, but can be larger.
It should be noted that the application provides a touch identification method, which comprises a touch identification method of a double-layer mutual capacitance subarea touch screen, a multi-layer mutual capacitance subarea touch screen and a double-layer uniform subarea mutual capacitance touch screen, and calculates the position coordinates of touch. Of course, those skilled in the art will readily recognize that the touch recognition methods provided herein may also be used for touch coordinate calculation of touch screens of other partitions, not exhaustive herein.
As described above, the touch recognition method, i.e., the touch coordinate calculation of the divisional touch screen, is described herein, and the specific patterns of the coordinate sensing electrodes, the area sensing electrodes, and the driving electrodes are not described in detail. The specific pattern of the coordinate sensing electrodes, the area sensing electrodes and the driving electrodes may adopt various existing patterns, which are not limited herein. Specific patterns of the coordinate sensing electrodes, the area sensing electrodes, and the driving electrodes may refer to, for example, chinese utility model patent application 2019203725947 and chinese utility model patent application 2019203725970 of the present applicant. Both of these utility patent applications are incorporated herein by reference in their entirety.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (5)
1. A touch screen sensor for a large-sized touch screen comprises a touch IC, a first electrode layer and a second electrode layer, wherein the first electrode layer is divided into N areas, and comprises a plurality of first electrodes for calculating touch positions and first area electrodes for identifying touch areas;
the first area electrode is inserted between the first electrodes;
the first area electrodes are respectively connected to pins of the touch IC through first signal lines, and the first area electrodes in the same area are connected to the same pins;
the first electrodes in each area are sequentially numbered, and N first electrodes with the same number in N areas are connected to the same corresponding pin of the touch IC through a second signal line;
the touch IC is used for acquiring the area induction quantity of the first area electrode and the coordinate induction quantity of the first electrode in real time, judging whether touch occurs according to the area induction quantity and the coordinate induction quantity, if so, judging the area where the touch occurs according to the area induction quantity and calculating the position coordinate of the touch according to the coordinate induction quantity,
the second electrode layer is divided into W areas, the second electrode layer comprises a plurality of second electrodes used for sensing touch positions and second area electrodes used for identifying touch areas, the value range of W is 2-10, the first electrode layer is an induction electrode layer, and the second electrode layer is a driving electrode layer; or the first electrode layer is a driving electrode layer and the second electrode layer is an induction electrode layer, the driving electrode layer comprises a plurality of driving electrodes, the plurality of driving electrodes are regularly arranged along a first direction, the induction electrode layer comprises a plurality of coordinate induction electrodes for inducing touch positions, the plurality of coordinate induction electrodes are regularly arranged along a second direction, and the first direction is vertical to the second direction;
the plurality of driving electrodes are respectively connected to pins of the touch IC through third signal lines, and W driving electrodes with the same serial number in W areas are connected to the same corresponding pin of the touch IC through the third signal lines;
the driving electrode layer and the sensing electrode layer are arranged in different layers,
the abscissa of the touch position is calculated by the following formula:
X’＝X+D’；
wherein X is an abscissa of the initial coordinate, X 'is an abscissa of the touched position, D' is an abscissa offset of the corresponding region,
the ordinate of the position of the touch is calculated by the following formula:
Y’＝Y+(U*i)；
wherein Y is the ordinate of the initial coordinate, namely the actually obtained coordinate, Y' is the ordinate of the touch position, namely the reported coordinate, U is the average pixel quantity, U x i is the ordinate offset, i is a natural number,
the touch screen sensor for the large-size touch screen is a touch screen sensor for a double-layer uniformly-partitioned mutual-capacitance touch screen without a fold line.
2. The touch screen sensor for large-sized touch screens of claim 1, wherein N ranges from 2 to 10.
3. The touch screen sensor for a large-sized touch screen according to claim 1, wherein the number of the coordinate sensing electrodes of each area of the sensing electrode layer is the same or the number of the coordinate sensing electrodes of each area of the sensing electrode layer is different.
4. A touch recognition method applied to the touch screen sensor according to any one of claims 1 to 3, wherein the first electrode layer is an induction electrode layer and the second electrode layer is a drive electrode layer; the method comprises the following steps:
the touch IC collects the area induction quantity of an area induction electrode and the coordinate induction quantity of the coordinate induction electrode in real time;
judging whether touch occurs according to the area induction quantity and the coordinate induction quantity;
if the touch occurs, judging the area where the touch occurs according to the area induction quantity and calculating the position coordinate of the touch according to the coordinate induction quantity,
judging whether touch occurs according to the area induction quantity and the coordinate induction quantity, and the method comprises the following steps:
comparing and calculating the area induction quantity and the area reference quantity when no touch occurs to obtain an area variation quantity;
comparing and calculating the coordinate induction quantity and the coordinate reference quantity when no touch occurs to obtain a coordinate variation quantity;
if the area variation is larger than a preset area sensing threshold and the coordinate variation is larger than a preset coordinate sensing threshold, determining that the touch occurs, wherein the area where the area sensing electrode with the area variation larger than the preset area sensing threshold is located is the area where the touch occurs,
calculating location coordinates of the touch, including:
calculating to obtain an average pixel quantity according to the pixel value in the vertical direction of the coordinate sensing electrode and the area width proportion;
assigning the average pixel amount to each coordinate sensing electrode;
calculating an initial coordinate by adopting a gravity center algorithm according to the coordinate induction quantity and the average pixel quantity of the coordinate induction electrode which is touched;
calculating the abscissa offset according to the area where the touch occurs and the area width ratio, calculating the coordinates of the touched position according to the abscissa offset,
the abscissa of the touch position is calculated by the following formula:
X’＝X+D’；
wherein X is an abscissa of the initial coordinate, X 'is an abscissa of the touched position, D' is an abscissa offset of the corresponding region,
the ordinate of the position of the touch is calculated by the following formula:
Y’＝Y+(U*i)；
wherein Y is the ordinate of the initial coordinate, namely the actually obtained coordinate, Y' is the ordinate of the touch position, namely the reported coordinate, U is the average pixel quantity, U x i is the ordinate offset, i is a natural number,
the touch identification method is used for the double-layer equally-partitioned mutual-capacitance touch screen of the non-folding screen without the fold line.
5. The touch recognition method of claim 4, wherein if the area variation of the two area sensing electrodes is greater than the preset area sensing threshold, the two area variation are compared, and the area where the area sensing electrode with the greater area variation is located is determined as the area where the touch occurs.
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