CN112433647A - Method for acquiring channel mapping matrix data of capacitive touch screen - Google Patents
Method for acquiring channel mapping matrix data of capacitive touch screen Download PDFInfo
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- CN112433647A CN112433647A CN202011325916.6A CN202011325916A CN112433647A CN 112433647 A CN112433647 A CN 112433647A CN 202011325916 A CN202011325916 A CN 202011325916A CN 112433647 A CN112433647 A CN 112433647A
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- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
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Abstract
A method for acquiring channel mapping matrix data of a capacitive touch screen comprises the following steps: acquiring original channel data of the capacitive touch screen before channel mapping and a first original value of an original channel; calculating a first area proportion of each original channel on the capacitive touch screen; acquiring mapping channel data of the capacitive touch screen after channel mapping; calculating a second area proportion of each mapping channel corresponding to each original channel on the capacitive touch screen after channel mapping; calculating a proportional weight according to the first area proportion and the second area proportion; calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight; and calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value. The method and the device can realize any channel mapping on any capacitive touch screen.
Description
Technical Field
The invention belongs to the technical field of capacitive touch screens, and particularly relates to a method for acquiring channel mapping matrix data of a capacitive touch screen.
Background
With the continuous development of smart phones, the usage scenarios of smart phones are increasing, so that various requirements for screens are inevitably increased, so that more and more mobile phone screens with various specifications and sizes are generated, and more contents of touch screen data need to be read at a mobile phone end. For some mobile phones, besides touch coordinate data of a touch screen, touch sensing raw data and diff data of a specific channel matrix need to be acquired, so that the mobile phone with the requirement can be provided with the specific touch sensing raw data and the diff value only by matching a specific touch IC with the specific touch screen, the universality of the touch IC and the touch screen is greatly reduced, the cost of the whole screen is increased, and particularly, the OLED-ONCELL display glass with a large number of channels is adopted. In order to provide touch sensing raw data and diff data of a specific channel matrix for a mobile phone host end, the touch sensing raw data and diff data can be realized only after channels are combined, so that the channels are combined, the resources of display glass are wasted, the touch effect is poor, and the touch accuracy is poor.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for acquiring data of a channel mapping matrix of a capacitive touch screen, the method comprising the steps of:
acquiring original channel data of the capacitive touch screen before channel mapping and a first original value of an original channel;
calculating a first area proportion of each original channel on the capacitive touch screen;
acquiring mapping channel data of the capacitive touch screen after channel mapping;
calculating a second area proportion of each mapping channel corresponding to each original channel on the capacitive touch screen after channel mapping;
calculating a proportional weight according to the first area proportion and the second area proportion;
calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight;
and calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value.
Preferably, the expression of the first area ratio is:
ratio_X1＝X/M1；
wherein, ratio _ X1 represents the first area ratio, X represents a physical size of the capacitive touch screen in the X direction, and M1 represents the number of touch sensing units of the capacitive touch screen in the X direction before channel mapping.
Preferably, the expression of the second area ratio is:
ratio_X2＝X/M2；
wherein, ratio _ X2 represents the second area ratio, X represents a physical size of the capacitive touch screen in the X direction, and M2 represents the number of touch sensing units of the capacitive touch screen in the X direction after channel mapping.
Preferably, the expression of the proportional weight is:
WT＝ratio_X2/ratio_X1；
wherein WT represents the scale weight, ratio _ X2 represents the second area scale, and ratio _ X1 represents the first area scale.
Preferably, the calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight includes:
acquiring a first original channel corresponding to the selected mapping channel and a first channel original value corresponding to the first original channel;
acquiring a second original channel adjacent to the first original channel and a second channel original value corresponding to the second original channel;
judging the size relation between the proportional weight and 1;
and calculating the second original value according to the judgment result, the first channel original value and the second channel original value.
Preferably, when the proportional weight is greater than 1, the expression of the second original value is:
H＝I+(WT-1)*J；
wherein H represents the second original value, I represents the first channel original value, WT represents the scaling weight, and J represents the second channel original value.
Preferably, when the proportional weight is less than 1, the expression of the second original value is:
H＝I-(1-WT)*J；
wherein H represents the second original value, I represents the first channel original value, WT represents the scaling weight, and J represents the second channel original value.
Preferably, after the calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value, the method further includes:
and calculating peak of the capacitive touch screen after channel mapping according to the matrix data.
Preferably, after the calculating a peak value of the capacitive touch screen after channel mapping according to the matrix data, the method further includes the steps of:
and calculating the coordinate data of the capacitive touch screen subjected to channel mapping by a gravity center method according to the position of the peak.
According to the method for acquiring the channel mapping matrix data of the capacitive touch screen, any channel mapping can be realized on any capacitive touch screen, so that touch coordinate data can be acquired more conveniently, with low cost and high precision, touch sensing raw data and diff data of any channel matrix can be provided for a mobile phone host, the use scene of the capacitive touch screen is improved, and the use experience of the capacitive touch screen is improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for acquiring data of a channel mapping matrix of a capacitive touch screen according to the present invention;
fig. 2 is a schematic diagram of a capacitive touch screen before and after channel mapping in a method for acquiring channel mapping matrix data of the capacitive touch screen according to the present invention;
FIG. 3 is a schematic diagram of a prior art capacitive touch screen channel map.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, in the embodiment of the present application, the present invention provides a method for acquiring data of a channel mapping matrix of a capacitive touch screen, where the method includes the steps of:
s1: acquiring original channel data of the capacitive touch screen before channel mapping and a first original value of an original channel;
s2: calculating a first area proportion of each original channel on the capacitive touch screen;
s3: acquiring mapping channel data of the capacitive touch screen after channel mapping;
s4: calculating a second area proportion of each mapping channel corresponding to each original channel on the capacitive touch screen after channel mapping;
s5: calculating a proportional weight according to the first area proportion and the second area proportion;
s6: calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight;
s7: and calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value.
In the embodiment of the application, the method includes the steps that original channel data of a capacitive touch screen before channel mapping and a first original value of an original channel are obtained firstly, then a first area proportion of each original channel on the capacitive touch screen is calculated, and then mapping channel data of the capacitive touch screen after channel mapping is obtained; calculating a second area proportion of each mapping channel corresponding to each original channel on the capacitive touch screen after channel mapping; calculating a proportional weight according to the first area proportion and the second area proportion; calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight; and calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value.
In the embodiment of the present application, the expression of the first area ratio is:
ratio_X1＝X/M1；
wherein, ratio _ X1 represents the first area ratio, X represents a physical size of the capacitive touch screen in the X direction, and M1 represents the number of touch sensing units of the capacitive touch screen in the X direction before channel mapping.
In the embodiment of the present application, the expression of the second area ratio is:
ratio_X2＝X/M2；
wherein, ratio _ X2 represents the second area ratio, X represents a physical size of the capacitive touch screen in the X direction, and M2 represents the number of touch sensing units of the capacitive touch screen in the X direction after channel mapping.
In the embodiment of the present application, the expression of the proportional weight is:
WT＝ratio_X2/ratio_X1；
wherein WT represents the scale weight, ratio _ X2 represents the second area scale, and ratio _ X1 represents the first area scale.
In an embodiment of the present application, the calculating a second original value corresponding to each mapping channel according to the first original value and the scaling weight includes:
acquiring a first original channel corresponding to the selected mapping channel and a first channel original value corresponding to the first original channel;
acquiring a second original channel adjacent to the first original channel and a second channel original value corresponding to the second original channel;
judging the size relation between the proportional weight and 1;
and calculating the second original value according to the judgment result, the first channel original value and the second channel original value.
In the embodiment of the present application, when the proportional weight is greater than 1, the expression of the second original value is:
H＝I+(WT-1)*J；
wherein H represents the second original value, I represents the first channel original value, WT represents the scaling weight, and J represents the second channel original value.
In the embodiment of the present application, when the proportional weight is less than 1, the expression of the second original value is:
H＝I-(1-WT)*J；
wherein H represents the second original value, I represents the first channel original value, WT represents the scaling weight, and J represents the second channel original value.
In an embodiment of the present application, after the calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value, the method further includes:
and calculating peak of the capacitive touch screen after channel mapping according to the matrix data.
In this embodiment of the present application, after calculating a peak value of the capacitive touch screen after channel mapping according to the matrix data, the method further includes:
and calculating the coordinate data of the capacitive touch screen subjected to channel mapping by a gravity center method according to the position of the peak.
The present application is described in detail below with specific examples.
As shown in fig. 2, assuming that the physical size of the original capacitive touch screen in the X direction is Xmm, the Y direction is Ymm, the X direction has M1 touch sensing units, the Y direction has N1 touch sensing units, that is, the number of channels of the original capacitive touch screen is M1 × N1, the area of each touch sensing unit is proportional to the original value, the original value of the read original capacitive touch screen is a two-dimensional matrix of M1 × N1, ratio _ X1 ═ X/M1, Z11, and Z12 respectively represent the areas of the first and second touch sensing units in the X direction before mapping, R11, and R12 respectively represent the original values of the first and second touch sensing units in the X direction before mapping, it is now necessary to map the number of channels of the original capacitive touch screen into M2 touch sensing units in the X direction, N2 touch sensing units in the Y direction, and each touch sensing unit after mapping is shown in a dotted line in fig. 2, then, only the area of each mapped touch sensing unit needs to be calculated, and the original value data of each mapped touch sensing unit can be obtained, ratio _ X2 is X/M2, N11, N12 respectively represents the area of the first and second touch sensing units in the mapped X direction, NR11, NR12 respectively represents the original value of the first and second touch sensing units in the mapped X direction, the original value read out from the entire screen after mapping is a matrix of M2N 2, the original value of each corresponding mapped touch sensing unit needs to be reassigned, and the mapped column weight WT is ratio _ X2/ratio _ X1.
After mapping in fig. 2, a new sensing unit N11 has an area of a, B, C, and D, where an area of a is Z11, an area of B is N × Z21, an area of C is E × Z12, an area of D is F × Z22, where N is (Y/N2-Y/N1) (X/M1), F is (Y/N2-Y/N1) (X/M2-X/M1), E is (Y/N1) (X/M2-X/M1), N11 is Z11+ N × Z21+ E Z12+ F Z22, and the value of N11 is obtained to obtain a corresponding value of NR11, and the original values of the remaining sensing units are all assigned to the same original mapping mode, so that each of the original sensing units can be uniformly distributed as original data, and each of the original sensing units can be assigned with a full-screen data size data, and all the original mapping mode is assigned to the original sensing units, therefore, the touch coordinate can be accurately calculated when the finger touches the touch screen.
The original merged channel scheme, as shown in fig. 3, may cause the distribution of the original values of the AB portion of the merged channel compared to other areas to be uneven, and the distribution of the corresponding touch sensing amount may also be uneven when touched by a hand, which may cause poor touch accuracy and poor experience effect, and may cause the interference immunity of the entire touch screen body to be reduced, which may cause the risk of false touch.
When a finger touches a capacitive screen, the capacitance value of the position touched by the finger changes, a corresponding diff matrix can be obtained by subtracting a reference value from an original value, the general position touched is found out according to the obtained diff matrix, namely, the diff position meeting peak is found out, the absolute coordinate of the touch finger on the screen body is calculated by using the diff value of the diff matrix where the peak value is located and the specific gravity of the whole row or column calculation unit, the absolute coordinate value is properly zoomed by taking the resolution of a liquid crystal screen as a standard to obtain the final touch coordinate which is reported to a mobile phone end to be overlapped with the screen, the reporting of the touch coordinate to the mobile phone end is a more conventional requirement, for some mobile phones, the touch sensing original data and the diff data of a specific channel matrix are required to be obtained in addition to the touch coordinate data of the touch screen, and the specific touch sensing original data can be provided for the mobile phones which are required only by using a specific touch screen matched with a specific touch IC The initial data and the diff data can be reported to the host computer by using any touch IC and any touch screen, for example, a mobile phone end needs to obtain a 33 x 15 touch sensing initial data and diff data matrix from the touch screen, but the touch IC and the touch screen body used by the touch screen end are 33 x 13, so that the requirement of the mobile phone end cannot be met without using the channel mapping method of the invention, only the whole touch screen body can be replaced, the invention can achieve the aim without replacing the touch screen body, the 33 x 15 touch sensing initial data and the diff data matrix can be reported to the mobile phone end by using the channel mapping method, the area of each touch sensing unit before mapping is in direct proportion to the initial value, and the relation after mapping is still unchanged, therefore, only by calculating the area ratio of each mapped touch sensing unit to the area ratio of the previously located touch sensing unit, a new touch sensing original data and diff data matrix can be obtained, and thus, any channel mapping is realized.
According to the method for acquiring the channel mapping matrix data of the capacitive touch screen, any channel mapping can be realized on any capacitive touch screen, so that touch coordinate data can be acquired more conveniently, with low cost and high precision, touch sensing raw data and diff data of any channel matrix can be provided for a mobile phone host, the use scene of the capacitive touch screen is improved, and the use experience of the capacitive touch screen is improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A method for acquiring channel mapping matrix data of a capacitive touch screen is characterized by comprising the following steps:
acquiring original channel data of the capacitive touch screen before channel mapping and a first original value of an original channel;
calculating a first area proportion of each original channel on the capacitive touch screen;
acquiring mapping channel data of the capacitive touch screen after channel mapping;
calculating a second area proportion of each mapping channel corresponding to each original channel on the capacitive touch screen after channel mapping;
calculating a proportional weight according to the first area proportion and the second area proportion;
calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight;
and calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value.
2. The method for acquiring data of a channel mapping matrix of a capacitive touch screen according to claim 1, wherein the expression of the first area ratio is:
ratio_X1＝X/M1；
wherein, ratio _ X1 represents the first area ratio, X represents a physical size of the capacitive touch screen in the X direction, and M1 represents the number of touch sensing units of the capacitive touch screen in the X direction before channel mapping.
3. The method of claim 1, wherein the second area ratio is expressed as:
ratio_X2＝X/M2；
wherein, ratio _ X2 represents the second area ratio, X represents a physical size of the capacitive touch screen in the X direction, and M2 represents the number of touch sensing units of the capacitive touch screen in the X direction after channel mapping.
4. The method for acquiring data of a channel mapping matrix of a capacitive touch screen according to claim 1, wherein the expression of the proportional weight is:
WT＝ratio_X2/ratio_X1；
wherein WT represents the scale weight, ratio _ X2 represents the second area scale, and ratio _ X1 represents the first area scale.
5. A method according to claim 1, wherein the calculating a second original value corresponding to each mapping channel according to the first original value and the proportional weight comprises:
acquiring a first original channel corresponding to the selected mapping channel and a first channel original value corresponding to the first original channel;
acquiring a second original channel adjacent to the first original channel and a second channel original value corresponding to the second original channel;
judging the size relation between the proportional weight and 1;
and calculating the second original value according to the judgment result, the first channel original value and the second channel original value.
6. The method of claim 5, wherein when the scaling weight is greater than 1, the second original value is expressed as:
H＝I+(WT-1)*J；
wherein H represents the second original value, I represents the first channel original value, WT represents the scaling weight, and J represents the second channel original value.
7. The method as claimed in claim 5, wherein when the proportional weight is less than 1, the expression of the second original value is:
H＝I-(1-WT)*J；
wherein H represents the second original value, I represents the first channel original value, WT represents the scaling weight, and J represents the second channel original value.
8. A method according to claim 1, wherein after the calculating matrix data of the capacitive touch screen subjected to channel mapping according to the second original value, the method further comprises the following steps:
and calculating peak of the capacitive touch screen after channel mapping according to the matrix data.
9. The method for obtaining the channel mapping matrix data of the capacitive touch screen according to claim 8, wherein after the calculating the peak value of the capacitive touch screen after channel mapping according to the matrix data, the method further comprises the following steps:
and calculating the coordinate data of the capacitive touch screen subjected to channel mapping by a gravity center method according to the position of the peak.
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| CN114327150A (en) * | 2022-01-05 | 2022-04-12 | 深圳康咏科技有限公司 | Method, device and equipment for acquiring touch coordinates and storage medium |
| CN116339546A (en) * | 2023-05-23 | 2023-06-27 | 深圳曦华科技有限公司 | Method and device for processing original data of touch screen, electronic equipment and storage medium |
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