WO2020150984A1 - 接触面积的计算方法、装置、触控芯片、电子设备 - Google Patents
接触面积的计算方法、装置、触控芯片、电子设备 Download PDFInfo
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- WO2020150984A1 WO2020150984A1 PCT/CN2019/073093 CN2019073093W WO2020150984A1 WO 2020150984 A1 WO2020150984 A1 WO 2020150984A1 CN 2019073093 W CN2019073093 W CN 2019073093W WO 2020150984 A1 WO2020150984 A1 WO 2020150984A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- the embodiments of the present application relate to the field of data processing technology, and in particular to a method, device, touch chip, and electronic device for calculating a contact area.
- the capacitive touch screen realizes the determination of the two-dimensional coordinate position of the finger Touch by detecting the change of the capacitance of the screen body, and is currently widely used in interactive electronic products.
- touch technology is constantly innovating and developing. At this stage, the technology is not only satisfied with determining the position of the finger’s touch, but also presents the realization through multiple information. The trend of stereo touch to improve the operating efficiency of mobile phones.
- one of the technical problems solved by the embodiments of the present invention is to provide a method, device, touch chip, and electronic device for calculating the contact area to overcome the above-mentioned defects in the prior art.
- the embodiment of the application provides a method for calculating the contact area, which includes:
- the area of the contacted area on the touch screen is calculated.
- calculating the area of the touched area on the touch screen according to the determined capacitive touch sensing detector and the contact area calculation model includes:
- the area of the touched area on the touch screen is calculated according to the variables required for calculating the contact area and the contact area calculation model.
- variable required to calculate the contact area is related to the change in the capacitance value of the capacitive touch-sensitive detector and the rated area of the capacitive touch-sensitive detector.
- it further includes: establishing the capacitance value change of the capacitive touch sensing detector according to a fitting model and fitting with the actual area of the capacitive touch sensing detector being contacted Relationship; According to the fitting relationship and the rated area of the capacitive touch sensor detector, a variable required for calculating the contacted area is generated.
- the method before calculating the area of the contacted area on the touch screen according to the determined capacitive touch sensor detector and the contact area calculation model, the method further includes: The number of capacitive touch sensing detectors determines the contact area calculation model to be used when calculating the area of the touched area on the touch screen.
- the contact area calculation model to be used when calculating the area of the contacted area on the touch screen is determined, including : If the determined number of capacitive touch sensing detectors is 1, it is determined that the contact area calculation model to be used when calculating the area of the contacted area on the touch screen is the first contact area calculation model.
- the contact area calculation model to be used when calculating the area of the contacted area on the touch screen is determined, including : If the number of the determined capacitive touch sensing detectors is multiple, it is determined that the contact area calculation model to be used when calculating the area of the contacted area on the touch screen is the second contact area calculation model.
- a second contact area calculation model is established according to the capacitance change of the most edge capacitive touch sensing detector and the rated area of the middle capacitive touch sensing detector.
- a third contact area calculation model is established according to the contact area formed on the multiple capacitive touch sensing detectors.
- the method further includes: performing limit processing on the calculated area of the touched area on the touch screen.
- An embodiment of the present application also provides a contact area calculation device, which includes:
- the calibration unit is used to obtain the capacitance value change of the capacitive touch sensing detector on the touch screen, and determine the capacitance touch sensing detector whose capacitance value change exceeds the first threshold to calibrate the touched area;
- the area calculation unit is used to calculate the area of the touched area on the touch screen according to the determined capacitive touch sensing detector and the contact area calculation model.
- An embodiment of the present application also provides a touch control chip, which includes the computing device described in any embodiment of the present application.
- An embodiment of the present application also provides an electronic device, which includes the touch chip described in any of the embodiments.
- the capacitance value change of the capacitive touch sensing detector on the touch screen is obtained, and the capacitance touch sensing detector whose capacitance value change exceeds a first threshold is determined to calibrate the touched area;
- the determined capacitive touch sensor detector and the contact area calculation model calculate the area of the contacted area on the touch screen, and realize the stereo touch based on the area of the contacted area.
- FIG. 1 is a schematic flow chart of the method for calculating the contact area in Embodiment 1 of this application;
- FIG. 2 is a schematic flow chart of the method for calculating the contact area in the second embodiment of the application
- FIG. 3 is a schematic flow chart of the method for calculating the contact area in the third embodiment of the application.
- FIG. 4 is a schematic flow chart of the method for calculating the contact area in the fourth embodiment of the application.
- the capacitance value change of the capacitive touch sensing detector on the touch screen is obtained, and the capacitance touch sensing detector whose capacitance value change exceeds a first threshold is determined to calibrate the touched area;
- the determined capacitive touch sensor detector and the contact area calculation model calculate the area of the contacted area on the touch screen, and realize the stereo touch based on the area of the contacted area.
- Figure 1 is a schematic flow chart of the method for calculating the contact area in the first embodiment of the application; as shown in Figure 1, it includes:
- S101 Obtain a change in the capacitance value of a capacitive touch sensing detector on the touch screen, and determine a capacitive touch sensing detector whose change in capacitance value exceeds a first threshold to calibrate the touched area;
- the effective touch area on the touch screen is divided into several capacitive touch sensor detectors.
- a capacitive touch sensor detector can also be called A pitch.
- the capacitance of each capacitive touch sensor detector is affected by an external electric field or the environment changes, its corresponding capacitance value will change. For example, when a finger touches or approaches the touch screen, the actual touch The capacitance value of the capacitive touch sensing detector changes drastically.
- the shape of the capacitive touch sensor detector is not particularly limited, and may be any regular or irregular shape such as a rectangle, a square, a rhombus, and a triangle.
- a first threshold is set, and capacitive touch sensing detectors whose capacitance value changes over the first threshold constitute the touched area, or, also known as To calibrate the capacitive touch sensing detector whose capacitance value exceeds the first threshold value as the touched area.
- the above-mentioned change in the capacitance value can be reflected by the absolute value of the capacitance value difference before and after the touch, or directly by subtracting the capacitance signal amount after the touch from the capacitance signal amount before the touch. Response; Therefore, when using different ways to represent the change in capacitance value, the above-mentioned first threshold can be set adaptively.
- S102 Calculate the area of the touched area on the touch screen according to the determined capacitive touch sensor detector and the contact area calculation model.
- the calculation of the area of the touched area on the touch screen according to the determined capacitive touch sensor detector and the contact area calculation model in step S102 may specifically include:
- S112 Determine a variable required for calculating the contact area according to the determined change in the capacitance of the capacitive touch sensing detector
- the capacitance change of the capacitive touch sensor detector is also The more violent the finger is, the more capacitive touch sensing detectors are touched, that is, the more capacitive touch sensing detectors whose capacitance value change exceeds the set first threshold.
- the value of the maximum area is a statistical constant or fixed for a specific touch screen.
- the capacitance value change of the capacitive touch sensing detector and the fitting relationship with the actual contact area of the capacitive touch sensing detector can be established according to the fitting model; according to the fitting relationship and The rated area of the capacitive touch sensing detector generates variables required for calculating the contacted area.
- the fitting relationship may be a linear fitting relationship, or it may be another relationship that can reflect the change of the actual contact area of a single capacitive touch sensor detector and the corresponding capacitance difference.
- the variables required to calculate the contact area are related to the contact area calculation model. If it is based on the assumption that the contact area is described in a rectangular box, the contact area calculation model can be a rectangular area calculation model.
- the variables required to calculate the contact area are length, width.
- the variables required to calculate the contact area are side length; if it is based on the circular area calculation model, the variables required to calculate the contact area are radius and central angle.
- the contact area calculation model can be determined according to actual application scenarios.
- the contacted area is calibrated through step S101, the shape of the contacted area can be initially determined. Therefore, when determining the contact area calculation model, the contacted area shape can also be referred to, so that subsequent calculations The contact area is more accurate to meet the needs of different upper-level applications.
- the number of required variables can be flexibly set according to actual requirements, and it may also be one or two or more.
- S122 Calculate the area of the touched area on the touch screen according to the variables required for calculating the contact area and the contact area calculation model.
- the variables required for calculating the contact area can be used as the input of the contact area calculation model, so as to obtain the output of the contact area calculation model, which is the area of the contacted area on the touch screen.
- the output of the contact area calculation model which is the area of the contacted area on the touch screen.
- Figure 2 is a schematic flow chart of the method for calculating the contact area in the second embodiment of this application; as shown in Figure 2, it includes:
- S201 According to the determined number of capacitive touch sensing detectors, determine a contact area calculation model to be used when calculating the area of the contacted area on the touch screen.
- the number of capacitive touch sensing detectors in the contacted area may be one or more than one, so in order to deal with the difference in the number of capacitive touch sensing detectors, different contacts are set.
- Area calculation model considering that in actual applications, the number of capacitive touch sensing detectors in the contacted area may be one or more than one, so in order to deal with the difference in the number of capacitive touch sensing detectors, different contacts are set.
- step S201 according to the determined capacitive touch sensing
- the number of detectors when determining the contact area calculation model to be used when calculating the area of the touched area on the touch screen, if the determined number of capacitive touch sensing detectors is 1, it is determined
- the contact area calculation model to be used for the area of the touched area on the touch screen is the first contact area calculation model, which is directly based on the situation when a single capacitive touch sensor is contacted, that is, when The contact area only includes one capacitive touch sensing detector, and the first contact area model is used to determine the size of the contacted area on the single capacitive touch sensing detector.
- step S201 according to the determined number of capacitive touch sensing detectors, when determining the contact area calculation model to be used when calculating the area of the touched area on the touch screen, if the determined capacitive touch sensing If the number of detectors is multiple, it is determined that the contact area calculation model to be used when calculating the area of the contacted area on the touch screen is the second contact area calculation model.
- the establishment of the second contact area calculation model is specifically implemented by the following steps: determining the capacitive touch sensor detector at the extreme edge of the contacted area and its variation; according to the capacitive touch at the extreme edge.
- the capacitance change of the sensing detector and the rated area of the capacitive touch sensing detector in the middle establish a second contact area calculation model.
- step S201 according to the determined number of capacitive touch sensing detectors, when determining the contact area calculation model to be used when calculating the area of the touched area on the touch screen, if the determined capacitive touch sensing If the number of detectors is multiple, the contact area formed on each of the multiple capacitive touch-sensitive detectors can be determined first; according to the contact area formed on the multiple capacitive touch-sensitive detectors, establish The third contact area calculation model. Alternatively, the contact area formed by each capacitive touch sensing detector may be obtained based on the first contact area calculation model, and then the contact area formed by each capacitive touch sensing detector may be added to establish a third contact area calculation model.
- only the first contact area calculation model can be set, or only the second contact area calculation model can be set, or the first contact area calculation model and The above-mentioned second contact area calculation model.
- S202 Obtain a change in the capacitance value of the capacitive touch sensing detector on the touch screen, and determine the capacitive touch sensing detector whose capacitance value change exceeds a first threshold to calibrate the touched area;
- step S202 is similar to step S101 described above, and details are not repeated here.
- S203 Calculate the area of the touched area on the touch screen according to the determined capacitive touch sensor detector and the contact area calculation model.
- the variable required for the first calculation of the contact area model is determined according to the change in the capacitance of the capacitive touch-sensitive detector, and This variable is input into the first calculated contact area model, thereby calculating the area of the contacted area formed on the one capacitive touch sensing detector.
- the variables are length and width, that is, the length and width formed by contact on the capacitive touch sensor, and the product of length and width is used to obtain the The area of the touched area formed on the capacitive touch sensor.
- the variables required for the second calculation of the contact area model are determined according to the changes in the capacitance of these capacitive touch-sensitive detectors.
- the variable is input into the second calculated contact area model, thereby calculating the area of the contacted area formed by the at least two capacitive touch sensing detectors.
- the second calculated contact area model is established based on the following technical process: according to the capacitive touch sensor at the edge of the touched area and its change, and according to the capacitive change at the edge of the capacitive touch sensor and the middle The rated area of the capacitive touch sensor detector; determine the rated area of the capacitive touch sensor detector at the edge of the touched area and the capacitive touch sensor detector in the middle, and input them into the second calculated contact area model, thereby Get the area of the contacted area.
- the number of capacitive touch sensing detectors at the edge and the number of capacitive touch sensing detectors in the middle can be determined according to actual application scenarios.
- the capacitive touch sensing detector at the edge is the leftmost one in the calibrated touched area.
- One column, the rightmost column of capacitive touch sensor detectors, and all the columns between the leftmost and rightmost capacitive touch sensor detectors are regarded as the middle capacitive touch sensor detectors.
- the marginal capacitive touch sensor detector can also be the capacitive touch sensor on the uppermost row and the lowermost row in the calibrated touched area, and is located between the uppermost side and the lowermost side.
- All rows of capacitive touch sensing detectors are regarded as the middle capacitive touch sensing detectors, or the edge capacitive touch sensing detectors are regarded as the top row, the bottom row, the leftmost column, and the rightmost One column of capacitive touch-sensitive detectors on the side.
- the most edge capacitive touch sensor detector is not specifically a row or column of capacitive touch sensor detectors, but can also be multiple rows or columns of capacitive touch sensor detectors.
- the middle edge node The number can be adjusted adaptively. Preferably, in practical applications, if the capacitance value of the most marginal capacitive touch sensor in the calibrated touched area exceeds the first threshold, it indicates that the marginal capacitive touch sensor is touched but may not It is not completely touched. At this time, the other capacitive touch sensing detectors between the most edge capacitive touch sensing detectors are almost completely contacted. Therefore, the sum of the contacted areas of the capacitive touch sensing detectors in the middle is actually the same.
- the product of the number and the rated area of a single capacitive touch sensitive detector similarly use the first area model to calculate the touched area on each of the most edge capacitive touch sensor detectors, and then add the sum of the touched area of the capacitive touch sensor detector in the middle to get the touched area The area of the area.
- Figure 3 is a schematic flow chart of the method for calculating the contact area in the third embodiment of the application; in this embodiment, taking only any one capacitive touch sensor detector A on the touch screen as an example, how to calculate the capacitive touch
- the change in the capacitance value of the capacitive touch-sensitive detector A refers to the change in the capacitance value of the capacitive touch-sensitive detector A when the touch screen is touched, which can be specifically determined by the detection circuit.
- the rated area of the capacitive touch sensor detector A is finalized, the rated area is actually a fixed value or a known parameter.
- the capacitive touch sensor detector A is completely touched so that the capacitance change can be determined by experimental data, for example, by covering the capacitive touch sensor detector A completely with a grounded copper pillar as large as the capacitive touch sensor detector A, thereby confirming that it is completely touched When the capacitance value changes.
- the capacitance value of each capacitive touch sensing detector before being touched may be different. Therefore, for different capacitive touch sensing detectors, the capacitance when it is completely touched The value change may differ numerically.
- l touch1 the contact length along the drive channel or the sensing channel
- D 0 the amount of change in capacitance corresponding to a single capacitive touch sensing detector when it is completely touched, or as mentioned above, it is also called the maximum change in capacitance of a single capacitive touch sensing detector;
- f 1 (l touch1 ) the functional relationship between l touch1 and the capacitance value of a single capacitive touch sensor detector
- the contact length along the driving channel or the sensing channel can be expressed as:
- L 0 The rated length or width of a single capacitive touch sensor detector (usually a known quantity). If the drive channel is set vertically and the sensing channel is set horizontally, when calculating the contact length along the direction of the drive channel or the sensing channel, L 0 in the above formula respectively represents the length of a single capacitive touch sensing detector along the driving channel and the length along the detection channel. In other scenarios, if the capacitive touch sensing detector is square, l 0 represents the side length.
- f 2 (D) the relationship function between the capacitance value of a single capacitive touch sensor detector and the contact length l touch1 .
- f 2 (D) is the inverse function of f 1 (l touch1 ).
- step S302 the fitting relationship in step S302 is established through a linear fitting model. Therefore, the capacitance value change of the capacitive touch sensing detector A and the simulation of the actual area contacted by the capacitive touch sensing detector A can be established.
- the joint relationship is: Put into formula (2) to get:
- S304 Calculate the area of the touched area on the capacitive touch sensing detector A according to the variables required for calculating the contact area and the first contact area calculation model.
- the contact area calculation model is a rectangular area calculation model
- the contact lengths l touch1_driver and l touch1_sensor along the driving channel and the sensing channel can be calculated in the capacitive touch sensor by multiplying Area S of the contacted area on A:
- the steps of establishing the above-mentioned fitting relationship are not necessarily included in the calculation method flow of the contact area. In fact, it can also be established in advance, and the above-mentioned fitting relationship can be directly called during the calculation of the contact area. .
- FIG. 4 is a schematic flow chart of the method for calculating the contact area in the fourth embodiment of the application; in this embodiment, a plurality of (for example, three, denoted as B1, B2, and B3) on the touch screen are touched by capacitive touch sensing
- the detector is taken as an example to illustrate how to calculate the actual contact area on the touch screen.
- the capacitive touch sensing detectors B1, B2, B3 form the contacted area along the detection channel direction; as shown in Figure 4, it includes:
- the capacitance value changes of the capacitive touch sensing detectors B1, B2, B3, the rated area of the capacitive touch sensing detectors B1, B2, B3, and the capacitance when the capacitive touch sensing detectors B1, B2, and B3 are completely touched
- the acquisition of the value change is the same as that in the embodiment of FIG. 3 described above.
- S402 Establish a fitting function according to the changes in capacitance values of the capacitive touch sensing detectors B1 and B3 and the actual contact areas of the capacitive touch sensing detectors B1 and B3 respectively;
- the description of establishing the fitting function for the capacitive touch sensing detectors B1 and B3 is similar to the description of steps 303-304 in FIG. 3 above.
- the capacitance value of the most marginal capacitive touch sensor in the calibrated touched area exceeds the first threshold, it means that the marginal capacitive touch sensor is touched but It may not be completely touched.
- the other capacitive touch-sensing detectors between the most edge capacitive touch-sensitive detectors are almost completely touched. Therefore, the capacitive touch-sensitive detectors B1 and B3 are the most edge nodes, and the capacitive touch-sensitive detectors
- the touch-sensitive detector B2 serves as the middle capacitive touch-sensitive detector. It can be considered that the capacitive touch sensor detector is almost completely contacted, but the capacitive touch sensor detectors B1 and B3 are not completely contacted. Therefore, it can be determined through steps S402 and S403 and the rated area of the capacitive touch sensor detectors B1 and B3
- the variable l touch used to calculate the contacted area is
- N The number of capacitive touch sensing detectors in the calibrated touched area
- S404 Calculate the area of the contacted area formed by the capacitive touch sensing detectors B1, B2, B3 according to the variables required for calculating the contacted area and the second contact area calculation model.
- the area of the touched area formed by the capacitive touch sensing detectors B1, B2, and B3 can be calculated:
- it further includes: performing limit processing on the calculated area of the touched area on the touch screen, for example, for the touched area calculated in FIG. 3 or FIG. 4
- the area of the area for example, for the single capacitive touch sensing detector in FIG. 3, if the calculated area of the contacted area exceeds its rated area s 0 , the calculated area of the contacted area is directly replaced by the rated area.
- the middle capacitive touch sensor cannot be determined in the whole of the initially calibrated contacted area, or there is no middle capacitive touch sensor, you can refer to the third embodiment above to calculate each The actual contact area of the capacitive touch sensing detector is then summed to obtain the area of the contacted area. In other application scenarios, if the middle capacitive touch sensing detector can be determined, the area of the contacted area is calculated with reference to the solution of the fourth embodiment.
- An embodiment of the present application also provides a contact area calculation device, which includes:
- the calibration unit is used to obtain the capacitance value change of the capacitive touch sensing detector on the touch screen, and determine the capacitance touch sensing detector whose capacitance value change exceeds the first threshold to calibrate the touched area;
- the area calculation unit is used to calculate the area of the touched area on the touch screen according to the determined capacitive touch sensing detector and the contact area calculation model.
- An embodiment of the present application also provides a touch control chip, which includes the computing device described in any embodiment of the present application.
- An embodiment of the application also provides an electronic device, which includes the touch chip described in any of the embodiments.
- the area of the contacted area and the coordinates of the contacted area are calculated, they are sent to the host computer for different The execution of functions, such as the control of handwriting thickness.
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Abstract
一种接触面积的计算方法、装置、触控芯片、电子设备，接触面积的计算方法包括：获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域（S101）；根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积（S102）。接触面积的计算方法基于被接触区域的面积实现立体触控。
Description
本申请实施例涉及数据处理技术领域，尤其涉及一种接触面积的计算方法、装置、触控芯片、电子设备。
电容式触摸屏是通过检测屏体电容的变化来实现对手指Touch二维坐标位置的确定，目前被广泛应用于交互式电子产品中。
然而，随着用户对触控的便捷性、操作性能的不断追求，触控技术也在不断革新和发展，使得现阶段该技术不仅仅满足于对手指Touch位置的确定，并呈现通过多元信息实现立体触控的趋势，以提高手机的操作效率。
因此，亟待提供一种可实现立体触控的方案。
发明内容
有鉴于此，本发明实施例所解决的技术问题之一在于提供一种接触面积的计算方法、装置、触控芯片、电子设备，用以克服现有技术中的上述缺陷。
本申请实施例提供了一种接触面积的计算方法，其包括：
获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；
根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
可选地，在本申请的任一实施例中，根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积，包括：
根据确定出的电容触摸感应检测器的电容值变化，确定计算接触面积所需的变量；
根据所述计算接触面积所需的变量以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
可选地，在本申请的任一实施例中，计算接触面积所需的变量关联于在所述电容触摸感应检测器的电容值变化以及所述电容触摸感应检测器的额定面积。
可选地，在本申请的任一实施例中，还包括：根据拟合模型建立所述电容触摸感应检测器的电容值变化以及与所述电容触摸感应检测器被接触的实际面积的拟合关系；根据所述拟合关系以及所述电容触摸感应检测器的额定面积，生成用于计算被接触面积所需的变量。
可选地，在本申请的任一实施例中，根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积之前，还包括：根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型。
可选地，在本申请的任一实施例中，根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型，包括：若所述确定出的电容触摸感应检测器的数量为1，则确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型为第一接触面积计算模型。
可选地，在本申请的任一实施例中，根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型，包括：若所述确定出的电容触摸感应检测器的数量为多个，则确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型为第二接触面积计算模型。
可选地，在本申请的任一实施例中，还包括：
确定被接触区域最边缘的电容触摸感应检测器及其变化量；
根据所述最边缘的电容触摸感应检测器的电容变化量以及中间的电容触摸感应检测器的额定面积建立第二接触面积计算模型。
可选地，在本申请的任一实施例中，还包括：
确定在多个电容触摸感应检测器中每个电容触摸感应检测器上形成的接触面积；
根据在对多个电容触摸感应检测器形成的接触面积，建立第三接触面积计算模型。
可选地，在本申请的任一实施例中，还包括：对计算出的所述触控屏上被接触区域的面积进行限值处理。
本申请实施例还提供一种接触面积的计算装置，其包括：
标定单元，用于获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；
面积计算单元，用于根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
本申请实施例还提供一种触控芯片，其包括本申请任一实施例中所述的计算装置。
本申请实施例还提供一种电子设备，其包括任一实施例中所述的触控芯片。
本申请实施例提供的技术方案中，通过获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积，基于被接触区域的面积实现立体触控。
后文将参照附图以示例性而非限制性的方式详细描述本申请实施例的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1为本申请实施例一中接触面积的计算方法流程示意图；
图2为本申请实施例二中接触面积的计算方法流程示意图；
图3为本申请实施例三中接触面积的计算方法流程示意图；
图4为本申请实施例四中接触面积的计算方法流程示意图。
实施本发明实施例的任一技术方案必不一定需要同时达到以上的所有优点。
下面结合本发明实施例附图进一步说明本发明实施例具体实现。
本申请实施例提供的技术方案中，通过获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积，基于被接触区域的面积实现立体触控。
图1为本申请实施例一中接触面积的计算方法流程示意图；如图1所示， 其包括：
S101、获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；
本实施例中，对于触控屏来说，为了精确地实现触控以及坐标定位，触控屏上的有效触控区域划分为若干个电容触摸感应检测器，一个电容触摸感应检测器又可以称之一个pitch，每个电容触摸感应检测器的电容在有外加电场影响或者环境变化时时，其对应的电容值会发生变化，比如，当有手指接触到或者靠近触控屏时，实际接触处的电容触摸感应检测器的电容值变化较为剧烈。此处，需要说明的是，电容触摸感应检测器的形状不作特别限定，可以是矩形、正方形、菱形、三角形等任意规则或者不规则的形状。
因此，为了准确地确定出触控屏上被接触区域，本实施例中，设置了第一阈值，电容值变化超过该第一阈值的电容触摸感应检测器组成被接触区域，或者，又称之为将电容值变化超过该第一阈值的电容触摸感应检测器标定为被接触区域。
此处，需要说明的是，上述电容值的变化可以通过触控前后电容值差值的绝对值来反映，也可以为通过触控前的电容信号量减去触控后的电容信号量来直接反应；因此，当采用不同的方式来表示电容值的变化时，可以适应性的设置上述第一阈值。
S102、根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
本实施例中，步骤S102中根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积时，具体可以包括：
S112、根据确定出的电容触摸感应检测器的电容值变化，确定计算接触面积所需的变量；
本实施例中，根据外加电场对电容触摸感应检测器的影响，可以概括为外加电场越强，电容触摸感应检测器受到的影响也就越大，对应地，电容触摸感应检测器的电容变化也就越剧烈，手指接触到更多个电容触摸感应检测器，即电容值变化超过设定第一阈值的电容触摸感应检测器数量也就越多。以此为例，为了准确反映接触面积与电容触摸感应检测器的关系，本实施例中，在确定计算接触面积所需的变量时，不但考虑电容触摸感应检测器的电容值变化，还综合考虑到单个所述电容触摸感应检测器的额定面积，即单个电容触摸感应检测器的最大面积，该最大面积对于特定的触控屏来说，其值是一个统计常量或者 固定不变。
在一具体应用场景中，可以根据拟合模型建立所述电容触摸感应检测器的电容值变化以及与所述电容触摸感应检测器被接触的实际面积的拟合关系；根据所述拟合关系以及所述电容触摸感应检测器的额定面积，生成用于计算被接触面积所需的变量。该拟合关系可为线性拟合关系，也可以为其它可以反应出单个所述电容触摸感应检测器的实际接触面积与对应电容差值的变化关系即可。具体计算接触面积所需的变量与接触面积计算模型有关，如果是基于假设接触区域以矩形框进行描述，则接触面积计算模型可以为矩形面积计算模型，计算接触面积所需的变量则为长度、宽度。如果基于其他接触面积计算模型比如正方形面积计算模型，则计算接触面积所需的变量则为边长；如果基于圆形面积计算模型，则计算接触面积所需的变量则为半径以及圆心角。当然，在具体实施时，可以根据实际应用场景来确定接触面积计算模型。
另外，由于通过步骤S101标定出了被接触的区域，因此，可以初步确定出被接触的区域形状，因此，在确定接触面积计算模型时，还可以参考被接触的区域形状，从而使得后续计算得到的接触面积更加准确，以满足不同上层应用的需求。
本实施例中，所需变量的个数根据实际需求灵活设置，也可以是一个或者两个或者多个。
S122、根据所述计算接触面积所需的变量以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
本实施例中，可以将计算接触面积所需的变量作为所述接触面积计算模型的输入，从而得到所述接触面积计算模型的输出，即为所述触控屏上被接触区域的面积。有关计算所述触控屏上被接触区域的面积的详细示例性描述可参见下述实施例的记载。
图2为本申请实施例二中接触面积的计算方法流程示意图；如图2所示，其包括：
S201、根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型。
本实施例中，考虑到在实际应用时，被接触区域的电容触摸感应检测器数量可能是1个，或者超过1个，所以为了针对电容触摸感应检测器的数量的不 同，设置了不同的接触面积计算模型。
比如，在一具体应用场景中，按照被接触区域的电容触摸感应检测器数量为1，或者至少为2，分别设置了不同的接触面积计算模型，因此，步骤S201中根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型时，若所述确定出的电容触摸感应检测器的数量为1，则确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型为第一接触面积计算模型，所述第一接触面积计算模型直接基于单个电容触摸感应检测器被接触的情形，即当被接触区域只包括1个电容触摸感应检测器，则该第一接触面积模型是用来确定该单个电容触摸感应检测器上被接触的面积大小。
因此，步骤S201中根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型时，若所述确定出的电容触摸感应检测器的数量为多个，则确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型为第二接触面积计算模型。进一步地，在一种应用场景中，具体通过如下步骤来实现第二接触面积计算模型的建立：确定被接触区域最边缘的电容触摸感应检测器及其变化量；根据所述最边缘的电容触摸感应检测器的电容变化量以及中间的电容触摸感应检测器的额定面积建立第二接触面积计算模型。
或者，步骤S201中根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型时，若所述确定出的电容触摸感应检测器的数量为多个，则可以首先确定在多个电容触摸感应检测器中每个电容触摸感应检测器上形成的接触面积；根据在对多个电容触摸感应检测器形成的接触面积，建立第三接触面积计算模型。或者又可以为基于上述第一接触面积计算模型得到各个电容触摸感应检测器形成的接触面积，再对各个电容触摸感应检测器形成的接触面积进行加和运算，以建立第三接触面积计算模型。
需要说明的是，可以根据使用场景的需求，可以只设置上述第一接触面积计算模型，或者，也可以只设置上述第二接触面积计算模型，或者，也可以同时设置第一接触面积计算模型和上述第二接触面积计算模型。
S202、获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；
本实施例中，步骤S202类似上述步骤S101，详细不再赘述。
S203、根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
在一种应用场景中，若被接触的区域中只包括1个电容触摸感应检测器，则根据该电容触摸感应检测器的电容值变化，确定出第一计算接触面积模型所需的变量，将该变量输入到第一计算接触面积模型中，从而计算出在该1个电容触摸感应检测器上形成的被接触区域的面积。比如，第一计算接触面积模型为矩形面积计算模型，则该变量为长度和宽度，即在该一个电容触摸感应检测器上由于被接触形成的长度和宽度，再利用长度和宽度乘积从而得到在该1个电容触摸感应检测器上形成的被接触区域的面积。
在另外一种应用场景中，若被接触的区域中包括至少2个电容触摸感应检测器，则根据这些电容触摸感应检测器的电容值变化，确定出第二计算接触面积模型所需的变量，将该变量输入到第二计算接触面积模型中，从而计算出在该至少2个电容触摸感应检测器形成的被接触区域的面积。则若第二计算接触面积模型基于如下技术处理过程建立：根据被接触区域最边缘的电容触摸感应检测器及其变化量，以及根据所述最边缘的电容触摸感应检测器的电容变化量以及中间的电容触摸感应检测器的额定面积；则确定出被接触区域最边缘的电容触摸感应检测器以及中间的电容触摸感应检测器的额定面积，并将其输入到第二计算接触面积模型中，从而得到被接触区域的面积。
其中，最边缘的电容触摸感应检测器以及中间的电容触摸感应检测器的数量，可以根据实际应用场景来确定，比如，最边缘的电容触摸感应检测器为标定的被接触区域中最左侧的一列、最右侧的一列电容触摸感应检测器，而位于最左侧、最右侧之间的所有列的电容触摸感应检测器则视为中间的电容触摸感应检测器。当然，在其他实施场景中，最边缘的电容触摸感应检测器也可以为标定的被接触区域中最上侧一行、最下侧一行的电容触摸感应检测器，而位于最上侧、最下侧之间的所有行的电容触摸感应检测器则视为中间的电容触摸感应检测器，或则，最边缘的电容触摸感应检测器还以为最上侧一行、最下侧一行、最左侧的一列、最右侧的一列的电容触摸感应检测器。
此处，需要说明的是，最边缘的电容触摸感应检测器并不特定为一行或者一列电容触摸感应检测器，也可以是多行或者多列电容触摸感应检测器，对应地，中间的边缘节点的数量可适应性调整。优选地，在实际应用中，如果标定的被触控区域中，最边缘的电容触摸感应检测器的电容值变化超过了第一阈值， 则表明最边缘的电容触摸感应检测器被接触但可能并未完全被接触，那此时，最边缘的电容触摸感应检测器之间的其他电容触摸感应检测器几乎完全被接触，因此，这些中间的电容触摸感应检测器的被接触面积总和实际上就是其数量与单个电容触摸感应检测器的额定面积的乘积。再通过类似利用上述第一面积模型分别计算出每个最边缘的电容触摸感应检测器上的被接触面积，再与中间的电容触摸感应检测器的被接触面积总和加和运算，从而得到被接触区域的面积。
图3为本申请实施例三中接触面积的计算方法流程示意图；本实施例中，以只接触到触控屏上的任一一个电容触摸感应检测器A为例说明如何计算在该电容触摸感应检测器上实际的接触面积，即电容触摸感应检测器A由于被触控其对应的电容值变化超过第一阈值，如图3所示，其包括：
S301、获取电容触摸感应检测器A的电容值变化、电容触摸感应检测器A的额定面积、电容触摸感应检测器A完全被接触时的电容值变化；
本实施例中，如前所述，电容触摸感应检测器A的电容值变化是指触控屏被触摸时该电容触摸感应检测器A的电容值变化，具体可以通过检测电路确定出。电容触摸感应检测器A的额定面积在触控屏定型之后，该额定面积实际上是固定值，或者是已知参数。电容触摸感应检测器A完全被接触使得电容变化可以通过实验数据来确定，比如通过将与电容触摸感应检测器A等大的接地铜柱完全覆盖电容触摸感应检测器A，从而确定其完全被接触时的电容值变化。需要说明的是，由于触控屏加工工艺等影响，每个电容触摸感应检测器未被接触前的电容值可能存在差异，因此，对于不同的电容触摸感应检测器，其完全被接触时的电容值变化在数值上可能不同。
S302、根据拟合模型建立所述电容触摸感应检测器A的电容值变化以及与所述电容触摸感应检测器A被接触的实际面积的拟合关系；
本实施例中，对于单个电容触摸感应检测器而言，当被手指完全覆盖时，其对应的电容值变化量基本恒定并达到一个最大值，而当手指与单个电容触摸感应检测器的接触的面积变小时，对应的电容值变化量也会变小；因此电容量变化与接触面积存在以下函数关系：
D＝f
1(l
touch1)*D
0 (1)
D：触摸屏被接触时电容触摸感应检测器的电容值变化；
l
touch1：沿着驱动通道或者感应通道方向的接触长度；
D
0：单个电容触摸感应检测器被完全接触时对应的电容值变化量，或者如 前所述又称之为单个电容触摸感应检测器的电容值最大变化量；
f
1(l
touch1)：l
touch1与单个电容触摸感应检测器的电容值的函数关系；
实际上，当采用矩形面积计算模型，沿着驱动通道或者感应通道方向的接触长度可表示为：
l
touch1＝f
2(D)*l
0 (2)
l
0：单个电容触摸感应检测器的额定长度或者宽度(通常为已知量)，如果驱动通道为纵向设置，感应通道为横向设置，在计算沿着驱动通道或者感应通道方向的接触长度时，上述公式中的l
0分别表示单个电容触摸感应检测器沿着驱动通道的长度、沿着检测通道的长度。在其他场景中，如果电容触摸感应检测器成正方形，则l
0表示边长长度。
f
2(D)：单个电容触摸感应检测器的电容值与接触长度l
touch1的关系函数。
对照上述公式(1)(2)，f
2(D)为f
1(l
touch1)的反函数。
具体地，通过线性拟合模型建立步骤S302中的拟合关系，因此，可以建立所述电容触摸感应检测器A的电容值变化以及与所述电容触摸感应检测器A被接触的实际面积的拟合关系为：
带入公式(2)中得到：
S303、根据所述拟合关系以及所述电容触摸感应检测器A的额定面积，生成用于计算被接触面积所需的变量；
参见上述f
2(D)建立的拟合关系以及所述电容触摸感应检测器A的额定面积，生成用于计算被接触面积所需的变量l
touch1，即将沿着驱动通道以及感应通道方向的接触长度l
touch1_driver、l
touch1_sensor作为计算被接触面积所需的变量。
S304、根据所述计算接触面积所需的变量以及第一接触面积计算模型，计算在所述电容触摸感应检测器A上被接触区域的面积。
如前所述，由于接触面积计算模型为矩形面积计算模型，因此，沿着驱动通道以及感应通道方向的接触长度l
touch1_driver、l
touch1_sensor做乘法运算，即可可以计算在所述电容触摸感应检测器A上被接触区域的面积S：
S＝l
touch1_driver*l
touch1_sensor
需要说明的是，建立上述拟合关系的步骤并非一定要包括在接触面积的计算方法流程中，实际上，也可以预先建立好，在进行接触面积的计算过程中直接调用上述拟合关系即可。
图4为本申请实施例四中接触面积的计算方法流程示意图；本实施例中， 以接触到触控屏上的多个(比如为3个，分别记为B1、B2、B3)电容触摸感应检测器为例说明如何计算在该触控屏上实际的接触面积，电容触摸感应检测器B1、B2、B3组成沿着检测通道方向的被接触区域；如图4所示，其包括：
S401、获取电容触摸感应检测器B1、B2、B3的电容值变化、电容触摸感应检测器B1、B2、B3的额定面积、电容触摸感应检测器B1、B2、B3完全被接触时的电容值变化；
本实施例中，电容触摸感应检测器B1、B2、B3的电容值变化、电容触摸感应检测器B1、B2、B3的额定面积、电容触摸感应检测器B1、B2、B3完全被接触时的电容值变化的获取，跟上述图3实施例中的相同。
S402、分别根据电容触摸感应检测器B1、B3的电容值变化以及与电容触摸感应检测器B1、B3接触的实际面积，建立拟合函数；
S403、根据所述拟合函数以及电容触摸感应检测器B1、B3的额定面积，生成用于计算被接触面积所需的变量；
本实施例中，针对电容触摸感应检测器B1、B3建立拟合函数的描述类似与上述图3中步骤303-304的描述。
本实施例中，如前所述，如果标定的被触控区域中，最边缘的电容触摸感应检测器的电容值变化超过了第一阈值，则表明最边缘的电容触摸感应检测器被接触但可能并未完全被接触，那此时，最边缘的电容触摸感应检测器之间的其他电容触摸感应检测器几乎完全被接触，因此，电容触摸感应检测器B1、B3作为最边缘节点，而电容触摸感应检测器B2作为中间的电容触摸感应检测器。则可认为电容触摸感应检测器几乎被完全接触，而电容触摸感应检测器B1、B3未被完全接触，因此，可通过步骤S402、S403，以及电容触摸感应检测器B1、B3的额定面积，确定用于计算被接触面积所需的变量l
touch：
l
touch2＝(f
2(D
first)+f
2(D
last)+(N-2))*l
0(N≥2)
f
2(D
first)：最左侧的单个电容触摸感应检测器的电容变化与接触长度l
touch2的关系函数；
f
2(D
last)：最右侧的单个电容触摸感应检测器的电容变化与接触长度l
touch2的关系函数；
N：标定的被接触区域中的电容触摸感应检测器数；
S404、根据用于计算被接触面积所需的变量以及第二接触面积计算模型，计算所述电容触摸感应检测器B1、B2、B3构成的被接触区域的面积。
分别计算出沿着驱动通道以及感应通道方向的接触长度l
touch2_driver、l
touch2_sensor即可以计算出所述电容触摸感应检测器B1、B2、B3构成的被接触区域的面积：
S＝l
touch2_driver*l
touch2_sensor
可选地，在本申请的任一实施例中，还包括：对计算出的所述触控屏上被接触区域的面积进行限值处理，比如针对图3或者图4中计算出的被接触区域的面积，比如对于图3中的单个电容触摸感应检测器来说，计算出的被接触区域的面积超过其额定面积s
0，则直接用额定面积代替计算出的被接触区域的面积。
在其他应用场景中，如果初步标定的被接触区域整体中无法确定出中间的电容触摸感应检测器，或者又称之不存在中间的电容触摸感应检测器，则可以参照上述实施例三计算每个电容触摸感应检测器被接触的实际面积再进行求和运算，从而得到被接触区域的面积。在其他应用场景中，如果可以确定出中间的电容触摸感应检测器，则参照上述实施例四的方案计算被接触区域的面积。
本申请实施例还提供一种接触面积的计算装置，其包括：
标定单元，用于获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；
面积计算单元，用于根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
本申请实施例还提供一种触控芯片，其包括本申请任一实施例中所述的计算装置。
本申请实施例还提供一种电子设备，其包括任一实施例中所述的触控芯片，当计算出被接触区域的面积以及被接触区域的坐标，则将其发送给上位机以进行不同功能的执行，比如笔迹粗细的控制。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。
Claims (13)
- 一种接触面积的计算方法，其特征在于，包括：获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
- 根据权利要求1所述的方法，其特征在于，根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积，包括：根据确定出的电容触摸感应检测器的电容值变化，确定计算接触面积所需的变量；根据所述计算接触面积所需的变量以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
- 根据权利要求2所述的方法，其特征在于，计算接触面积所需的变量关联于在所述电容触摸感应检测器的电容值变化以及所述电容触摸感应检测器的额定面积。
- 根据权利要求3所述的方法，其特征在于，还包括：根据拟合模型建立所述电容触摸感应检测器的电容值变化以及与所述电容触摸感应检测器被接触的实际面积的拟合关系；根据所述拟合关系以及所述电容触摸感应检测器的额定面积，生成用于计算被接触面积所需的变量。
- 根据权利要求1所述的方法，其特征在于，根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积之前，还包括：根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型。
- 根据权利要求5所述的方法，其特征在于，根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型，包括：若所述确定出的电容触摸感应检测器的数量为1，则确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型为第一接触面积计算模型。
- 根据权利要求5所述的方法，其特征在于，根据确定出的电容触摸感应检测器的数量，确定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型，包括：若所述确定出的电容触摸感应检测器的数量为多个，则确 定在计算所述触控屏上被接触区域的面积时要使用的接触面积计算模型为第二接触面积计算模型。
- 根据权利要求7所述的方法，其特征在于，还包括：确定被接触区域最边缘的电容触摸感应检测器及其变化量；根据所述最边缘的电容触摸感应检测器的电容变化量以及中间的电容触摸感应检测器的额定面积建立第二接触面积计算模型。
- 根据权利要求7所述的方法，其特征在于，还包括：确定在多个电容触摸感应检测器中每个电容触摸感应检测器上形成的接触面积；根据在对多个电容触摸感应检测器形成的接触面积，建立第三接触面积计算模型。
- 根据权利要求1-9任一项所述的方法，其特征在于，还包括：对计算出的所述触控屏上被接触区域的面积进行限值处理。
- 一种接触面积的计算装置，其特征在于，包括：标定单元，用于获取触控屏上电容触摸感应检测器的电容值变化，并确定电容值的变化超过第一阈值的电容触摸感应检测器，以标定被接触区域；面积计算单元，用于根据确定出的电容触摸感应检测器以及接触面积计算模型，计算所述触控屏上被接触区域的面积。
- 一种触控芯片，其特征在于，包括权利要求11所述的计算装置。
- 一种电子设备，其特征在于，包括权利要求12所述的触控芯片。
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