TW201324296A - Portable electronic apparatus, touch detecting assembly and touch sensitive device - Google Patents

Abstract

A touch detecting assembly is provided. The touch detecting assembly comprises: a substrate; and a plurality of induction units disposed on the substrate and not intersected with each other. Each induction unit comprises: an induction body, a first electrode and a second electrode. Each induction body has a rectangular shape with a plurality of empty parts arranged on the rectangular shape according to a predetermined pattern to define a passage of current for increasing a resistance between the first electrode and the second electrode. The passage of current extends between a first end and a second end of the induction body, and a cross-sectional area of the passage of current on a plane orthogonal to an extending direction of the passage of current is less than that of the induction body on the plane. With the touch detecting assembly, a resistance required by a detection precision may be obtained, thus improving a linearity of an induction. Furthermore, a touch sensitive device and a portable electronic apparatus are also provided.

Description

Portable electronic device, touch detection component and touch device

The present invention relates to the field of electronic device design and manufacturing technology, and in particular, to a touch detection component, a touch device having the touch detection component, and a portable electronic device.

At present, touch detection components (touch screens) have been applied in electronic devices such as mobile phones, PDAs (personal digital assistants), GPS (Global Positioning System), PMP (MP3, MP4, etc.), and even tablet computers. The touch screen has the advantages of simple, convenient and user-friendly touch operation, so the touch screen is expected to be the best interface for human-computer interaction and has been widely used in portable devices.
Capacitive touch detection components are generally classified into two types: self-capacitance and mutual capacitance. The existing single-layer self-capacitance touch screen is a strip-shaped scan electrode made of ITO (Indium Tin Oxides) on the surface of the glass. ITO is a conductive material with a fixed resistivity, which is relatively uniform on the substrate, as evidenced by the linearity of the resistive screen. These electrodes and the surrounding environment such as the circuit form a pole of a capacitor. When touched by hand or a touch pen, a capacitor is connected in parallel to the circuit, thereby changing the overall capacitance of the scan line. During scanning, the control IC scans each sensing element by a specific scanning method, and determines the position of the touched point according to the change of capacitance before and after the scanning, thereby achieving human-machine dialogue communication. In general, a capacitive touch screen is paired with a TFT (Thin Film Transistor) LCD and placed on top of the LCD.
Figure 1 shows a conventional self-capacitive touch detection element. The self-capacitive touch detection component mainly has double-layered diamond-shaped structure sensing units 100' and 200', and the detection principle is to scan the X-axis and the Y-axis separately, if the capacitance change of a certain intersection is detected beyond the preset range , the intersection of the row and column is used as the touch coordinates. Although the linearity of the self-capacitive touch detection element is good, there are often ghost spots, and it is difficult to achieve multi-touch. In addition, due to the use of a double-layer screen, the structure and cost are greatly increased, and the diamond-shaped structure may have coordinate shifts when the amount of capacitance change is small, which is greatly affected by external interference.
Figure 2a shows another conventional self-capacitive touch detection element. The self-capacitive touch detection element adopts a triangular graphic screen structure. The self-capacitive touch detection element includes a substrate 300', a plurality of triangular sensing units 400' disposed above the substrate 300', and a plurality of electrodes 500' connected to each of the triangular sensing units 400'. Figure 2b shows the detection principle of a triangular self-capacitive touch detection element. As shown in Fig. 2b, the ellipse represents the finger, and S1, S2 represent the contact area of the finger with the two triangular sensing units. Assuming that the coordinate origin is in the lower left corner, the abscissa X = S2 / (S1 + S2) * P, where P is the resolution. When the finger moves to the right, there is a deviation in the X coordinate since S2 does not increase linearly. It can be seen from the above principle that the conventional triangular sensing unit is single-ended detection, that is, detecting only from one direction, and then calculating coordinates in two directions by an algorithm. Although the self-capacitive touch detection element has a simple structure, it is not optimized for the capacitive sensing of the screen, and the capacitance variation is small, resulting in insufficient signal-to-noise ratio. In addition, since the sensing unit is triangular, the area does not increase linearly when the finger moves laterally, so the linearity is poor, resulting in offset calculation of the coordinates, and the linearity is not good enough.
In addition, the capacitance change of the output of the conventional capacitive sensing unit is small, reaching the flying level, and the existence of the stray capacitance of the cable puts higher requirements on the measuring circuit. Moreover, the stray capacitance will vary with temperature, position, internal and external electric field distribution and other factors, and even interfere with the measured capacitance signal. In addition, for a single-layer capacitor, the influence of the Vcom level signal may cause serious interference to the sensing capacitor, wherein the Vcom level signal is a level signal for preventing the LCD screen from aging and not flipping.

The present application is based on the inventors' knowledge of the fact that the sensing elements of conventional single-layer self-capacitive touch screens are strips of bilateral leads. After the size of the screen is determined, the size of the strip is basically determined. The width of the strip sensing element is approximately 5 mm, which widens the linearity, which narrows the channel sensing element. The length of the strip is basically the length of the touch screen. When the length and width of the strip are determined, the resistance between the ends of the strip is determined. Resistor R=P*L/h, where L is the length of the sensing element, h is the height of the sensing element, and P is the square resistance of the ITO (ie, the ITO layer plated on the substrate is made into a square and then The resistance from left to right is a basic parameter of the ITO substrate). The size of the square resistance P is related to the thickness of the ITO layer. There are only a few limited standard values for ITO resistance in the art. Thus, when a substrate having a fixed ITO square resistance is used as a single-layer self-capacitance touch screen, the resistance R of each strip can be calculated. However, since the principle of detecting a finger touch is to calculate the ratio of the resistance, if the resistance R is too large or too small, the detection accuracy is affected, wherein the parameter P is determined by the substrate, and L and h are determined by the size of the touch screen, and cannot be arbitrarily changed during design. Therefore, if the sensing element is made into a simple strip shape, the resistance is often not the most suitable value to measure.
The present invention is intended to solve at least some of the above technical problems, and in particular to at least solve or avoid one of the above disadvantages in conventional self-capacitive touch detection elements.
A first aspect of an embodiment of the present invention provides a touch detecting component, including: a substrate; and a plurality of sensing units disposed on the substrate and not intersecting each other, each of the sensing units including An induction body and a first electrode and a second electrode respectively connected to the sensing body, the sensing body having a plurality of hollow portions, the plurality of hollow portions being arranged in a predetermined rule to define on the sensing body A current path portion that increases resistance between the first and second electrodes.
According to the touch detecting element of the embodiment of the present invention, by providing the hollow portion on the sensing body, the path of the current path portion of the entire sensing body can be made thinner or longer, which is equivalent to the addition of the formula of R=P*L/h. L or reduced h, so that the resistance R between the first electrode and the second electrode becomes large, thereby obtaining the magnitude of the resistance required for the detection accuracy, thereby improving the linearity of the induction.
A second aspect of the embodiments of the present invention further provides a touch device including: a touch detecting component, the touch detecting component according to the first aspect of the present invention; and a control chip, the control A wafer is coupled to the first electrode and the second electrode, the control wafer being configured to apply a level signal to the first electrode and/or the second electrode to be generated between the first and second electrodes a current flowing through the current path portion for charging a self-capacitance generated when the current is touched to the sensing body, for calculating when the sensing body of the at least one sensing unit is detected to be touched Between the first resistance between the first electrode and the self-capacitance of the at least one sensing unit and the second resistance between the second electrode of the at least one sensing unit and the self-capacitance a proportional relationship, and configured to determine, according to a proportional relationship between the first resistance and the second resistance, a touch position at which the sensing body of the at least one sensing unit is touched.
According to the touch device of the embodiment of the invention, the determination of the touch position is achieved by calculating the ratio between the first resistor R1 and the second resistor R2, thereby improving measurement accuracy and improving linearity.
A third aspect of the embodiments of the present invention further provides a portable electronic device, including the touch detection component as described above.
A fourth aspect of the embodiments of the present invention further provides a portable electronic device, including the touch device as described above.
The additional aspects and advantages of the invention will be set forth in part in the description which follows.

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "left", "right", "vertical", "level", The orientation or positional relationship of the "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplified description, and does not indicate or imply that the device or component referred to has The specific orientation, construction and operation in a particular orientation are not to be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.
In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
In the present invention, the first feature "on" or "under" the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is less than the second feature.
The principle of detection of the touch device according to the embodiment of the second aspect of the present invention will first be described below. The touch device according to the embodiment of the present invention includes a touch detecting component 100 and a control wafer 200. As shown in FIG. 5, the touch detecting component 100 includes a substrate 1 and a sensing unit 2 disposed on the substrate 1, wherein the sensing unit 2 includes sensing The body 20 and the first electrode 21 and the second electrode 22 are connected to the sensing body 20. FIG. 5 is a schematic diagram of a touch device according to an embodiment of the present invention. In the embodiment of the present invention, if there are a plurality of sensing units 2, the non-intersecting sensing units 2 may be parallel to each other, or the non-intersecting sensing units 2 may be partially parallel. In an embodiment of the invention, the substrate 1 may be a single layer substrate. However, it should be noted that, for the plurality of sensing units 2, the structure of FIG. 5 is not limited, and the sensing unit 2 may adopt other structures, for example, some or all of the sensing units 2 have certain structures. These can be applied to the present invention in terms of curvature and the like.
The control wafer 200 is connected to the first electrode 21 and the second electrode 22, respectively, and the control wafer 200 is configured to apply a level signal to the first electrode 21 and/or the second electrode 22 to generate the first electrode 21 and the second electrode. The current flowing between the 22 through the current path portion 25 is used to charge the self-capacitance generated when the current is sensed by the current to the sensing body 20, and is used to calculate at least when the sensing body 20 of the at least one sensing unit 2 is detected to be touched. a proportional relationship between a first resistance between the first electrode 21 and the self-capacitance of the sensing unit 2 and a second resistance between the second electrode 22 of the at least one sensing unit 2 and the self-capacitance, and is used according to the first The proportional relationship between the resistance and the second resistance determines a touched position at which the sensing body 20 of the at least one sensing unit 2 is touched.
Specifically, a proportional relationship between the first resistance and the second resistance is between a first detection value and a second detection value obtained by detecting the first electrode and/or the second electrode when charging/discharging the self capacitance The proportional relationship is calculated, and the charging, discharging or detecting of the first electrode and the second electrode may be performed simultaneously as described above, or may be performed separately. When the touch detection element control wafer 200 determines that the corresponding sensing unit is touched according to the first detection value and the second detection value, the touch detection element control wafer 200 calculates the first resistance and the second according to the first detection value and the second detection value. The proportional relationship of the resistances further determines the touch position in the first direction, and determines the touch position in the second direction according to the position of the corresponding sensing unit 2. Finally, the touch detecting element controls the wafer 200 to determine the position of the touch point on the touch detecting element according to the touch position in the first direction and the touch position in the second direction. It should also be noted here that there is no limitation on the order of charging and discharging the sensing unit in the embodiment of the present invention. For example, in one embodiment, all the sensing units 2 can be sequentially charged in a scanning manner. And then, in turn, discharge detection is performed; in another embodiment, the sensing unit 2 can be charged and discharged one by one, for example, after charging one sensing unit 2, and then discharging is detected, the sensing unit is 2 After the processing is completed, the next sensing unit 2 is processed. In one embodiment of the present invention, the touch detecting element controls the wafer 200 to apply a level signal to the first electrode 21 and the second electrode 22 of the sensing unit 2 to charge the self capacitance, and the touch detecting element controls the wafer 200 from the first electrode 21 And/or the second electrode 22 performs charging detection to obtain a first charging detection value and a second charging detection value.
Specifically, the touch device of the embodiment of the invention adopts a novel self-capacitance detection mode, and when the sensing unit is touched, a self-capacitance is generated at a touch point of the sensing unit, and the touch point can divide the sensing unit into two resistors. Considering these two resistors while performing self-capacitance detection, the position of the touch point on the sensing unit can be determined. FIG. 3 is a schematic diagram of a detection principle of a touch device according to an embodiment of the invention. When the finger 300 touches the sensing unit, it is equivalent to dividing the sensing unit into the first and second two resistors R1 and R2, and the proportional relationship between the resistance values of the first resistor R1 and the second resistor R2 and the position of the touch point. Related. For example, as shown in FIG. 3, when the touch point is closer to the first electrode 21, the first resistor R1 is smaller, and the second resistor R2 is larger; otherwise, when the touch point is compared with the second electrode 22 In the near moment, the first resistor R1 is larger, and the second resistor R2 is smaller. Therefore, the position of the touch point on the sensing unit 2 can be determined by detecting the first resistor R1 and the second resistor R2.
In the embodiment of the present invention, the resistance values of the first resistor R1 and the second resistor R2 can be detected in various manners, for example, the detected value of the current, the detected value of the self-capacitance, the detected value of the self-capacitance level signal, and One or more of the charge change amount detection values of the self-capacitance, thereby obtaining the first resistor R1 and the second resistor R2 based on the detected values. In addition, in the embodiment of the present invention, the detection of the detection value may be performed when charging the self-capacitance (ie, obtaining the first charging detection value and the second charging detection value), or may be performed during self-capacitance discharging (ie, obtaining The first discharge detection value and the second discharge detection value). In addition, the detection performed during charging and discharging can be performed in various ways.
It should be noted that at least one of charging and discharging is performed from the first electrode 21 and the second electrode 22, so that two detection values of the difference between the first resistance and the second resistance can be obtained, that is, the first The detected value and the second detected value. That is, a current is required to pass through the first resistor R1 and the second resistor R2 during charging or discharging, so that the detected first detection value and second detection value may reflect between the first resistor R1 and the second resistor R2. Difference.
In an embodiment of the invention, it is generally necessary to charge twice and perform two tests, the charging including the simultaneous charging of the first electrode 21 and the second electrode 22. In some embodiments, two discharges can also be performed. For the sake of convenience, in the following examples, two charges and two tests were performed. It should be noted that performing two charging and two detecting is only one solution of the embodiment of the present invention, and the algorithm is relatively simple. However, those skilled in the art can also increase the number of times of charging and detecting according to the above idea, for example, three times charging and detecting can be performed, and then calculating the first resistor R1 according to the first charging detection value and the second charging detection value, and then according to The second charge detection value and the third charge detection value calculate the second resistance R2.
Specifically, embodiments according to the present invention include, but are not limited to, the following specific measurement methods for detection:
1. First applying a level signal to the first electrode 21 and the second electrode 22 of the sensing unit to charge the self-capacitor (the self-capacitance is generated by the sensing unit being touched); then from the first electrode 21 and/or the second electrode 22 performs charging and detecting to obtain a first charging detection value and a second charging detection value. In this embodiment, since charging is performed from the first electrode 21 and the second electrode 22, the detection may be detected from the first electrode 21, or may be detected from the second electrode 22, or from the first electrode 21 and The second electrodes 22 are respectively detected. It should be noted that, in this embodiment, the charging from the first electrode 21 and the second electrode 22 may be performed simultaneously, or separately, for example, the first electrode 21 and the second electrode 22 are simultaneously applied with the same electric power. The flat signal charges the self-capacitance. In other embodiments, the level signals applied to the first electrode 21 and the second electrode 22 may also be different; or, a level signal may be applied to the first electrode 21 first. Then, the same level signal or a different level signal is applied to the second electrode 22. Similarly, the detection from the first electrode 21 and the second electrode 22 may be performed simultaneously or separately. In the following embodiments, the detection and charging may be performed simultaneously or separately.
2. Applying a level signal to the first electrode 21 or the second electrode 22 of the sensing unit twice to charge the self-capacitor twice; detecting from the first electrode 21 and/or the second electrode 22 after each charging A first charge detection value and a second charge detection value are obtained. In this embodiment, since charging is performed from the first electrode 21 or the second electrode 22, detection is required to be performed from the first electrode 21 and the second electrode 22, respectively, from the first electrode 21 and the second electrode 22 The detection can be performed simultaneously or separately. Further, alternatively, it is also possible to perform charging twice at the first electrode 21 and two times from the first electrode 21, or two times from the second electrode 22, and two times at the second electrode 22. . When charging from one electrode twice, the other electrode is grounded or connected to a high resistance to change the state of the other electrode. For example, when a level signal is applied to the first electrode 21 of the sensing unit twice to charge the self-capacitor twice, wherein the second electrode 22 is grounded during one charging of the two charging, and another charging is performed. The second electrode 22 is connected to a high resistance during the process; when a level signal is applied twice to the second electrode 22 of the sensing unit to charge the self-capacitor twice, one of the two charging processes will be performed. The first electrode 21 is grounded, and the first electrode 21 is connected to a high resistance during another charging process. Thus, even if the first electrode 21 is charged twice, since the state of the second electrode 22 is changed, it is possible to perform two detections at the first electrode 21 to obtain a reaction between the first resistor R1 and the second resistor R2. The first detected value and the second detected value of the proportional relationship.
3. Applying a level signal to the first electrode 21 and the second electrode 22 of the sensing unit to charge the self-capacitor; then controlling the first electrode 21 and/or the second electrode 22 to be grounded to discharge the self-capacitance; thereafter, from the first electrode 21 and/or the second electrode 22 performs discharge detection to obtain the first discharge detection value and the second discharge detection value. In this embodiment, since the self-capacitance is charged from the first electrode 21 and the second electrode 22, discharge or detection can be performed from the first electrode 21 and/or the second electrode 22. Specifically, for example, a level signal may be simultaneously applied to the first electrode 21 and the second electrode 22 to charge the self capacitance, or a level signal may not be applied at the same time. The first electrode 21 may be grounded at both discharges, or both of the second electrode 22 may be grounded.
4. Applying a level signal to the first electrode 21 or the second electrode 22 of the sensing unit to charge the self-capacitor; then controlling the first electrode 21 and the second electrode 22 to ground respectively to discharge the self-capacitance; respectively, respectively, from the first electrode 21 and/or the second electrode 22 performs discharge detection to obtain a first discharge detection value and a second discharge detection value. In this embodiment, since the self-capacitance discharge is performed from the first electrode 21 and the second electrode 22, charging or detecting can be performed from the first electrode 21 and/or the second electrode 22. In this embodiment, both charges may also be performed from the first electrode 21, and the second electrode 22 may be grounded or connected to a high resistance, respectively. Similarly, both charges may be performed from the second electrode 22, and the first electrodes 21 may be grounded or connected to a high resistance, respectively.
5. Apply a level signal to the first electrode 21 or the second electrode 22 of the sensing unit to charge the self-capacitor; then respectively control the first electrode 21 or the second electrode 22 to ground to discharge the self-capacitance, and then respectively from the first electrode 21 and the second electrode 22 perform discharge detection to obtain a first discharge detection value and a second discharge detection value. In this embodiment, since the self-capacitance detection is performed from the first electrode 21 and the second electrode 22, charging or discharging can be performed from the first electrode 21 and/or the second electrode 22. In this embodiment, both charges may also be performed from the first electrode 21, and the second electrode 22 may be grounded or connected to a high resistance, respectively. Similarly, both charges may be performed from the second electrode 22, and the first electrodes 21 may be grounded or connected to a high resistance, respectively.
Alternatively, on the basis of the above embodiment, one detection may be performed at the time of charging to obtain a first charging detection value, and a second detection is performed at the time of discharging to obtain a second discharging detection value, and then according to the first charging detection value. And the second discharge detection value obtains a proportional relationship between the first resistor R1 and the second resistor R2.
It should be noted that, in the embodiment of the present invention, the functions of the first electrode 21 and the second electrode 22 are the same, and the two are interchangeable. Therefore, in the above embodiment, the first electrode 21 may be detected or may be It is detected from the second electrode 22 that a current can pass through the first resistor R1 and the second resistor R2 at the time of detection.
As can be seen from the above description, there are many variations on the above charging and detecting modes of the embodiments of the present invention, but embodiments of the present invention are based on the relationship between the first resistor R1 and the second resistor R2, such as a proportional relationship or Other relationships to determine the location of the touch point. Further, the relationship between the first resistor R1 and the second resistor R2 needs to be detected by charging and/or discharging of the self capacitor. If the sensing unit is not touched, the self-capacitance is not generated with the hand, so the data of the self-capacitance is detected to be small, and the judgment condition of the touch is not satisfied. For this, in the embodiment of the present invention, the scanning is continuously performed, waiting The calculation is started after the finger 300 touches the sensing unit, and details are not described herein again.
In the embodiment of the present invention, the corresponding voltages may be sequentially applied to the plurality of sensing units in a scanning manner, and may also be sequentially detected in a scanning manner during the detection.
It should be noted that the foregoing detection manners are only some preferred manners of the embodiments of the present invention, and those skilled in the art may also expand, modify, and modify according to the above ideas.
FIG. 4 is a flow chart of a touch detection method of a touch device according to an embodiment of the present invention, which will be described below in conjunction with the schematic diagram shown in FIG. 3. The touch detection method includes the following steps:
In step S401, a level signal is applied to both ends of the sensing unit, that is, a level signal is applied to the first electrode 21 and/or the second electrode 22 of the sensing unit. In this embodiment, the same level signal may be applied to the first electrode 21 and the second electrode 22, and different level signals may be applied. In other embodiments, charging may be performed only from the first electrode 21 or the second electrode 22 twice, or charging the second electrode 22 from the first electrode 21 for the second time, or the first time from the first The second electrode 22 is charged for the second time from the first electrode 21.
If the sensing unit is touched by a finger or other object at this time, the sensing unit will generate a self-capacitance C1 (refer to FIG. 3), and the self-capacitance can be charged by the applied level signal. In the embodiment of the present invention, the detection accuracy of the self-capacitance can be improved by charging the self-capacitance.
It should be noted that if a level signal is simultaneously applied to both ends of the sensing unit, the corresponding two capacitance detecting modules CTS are required to be simultaneously detected from the first electrode 21 and the second electrode 22. If it is applied to both ends of the sensing unit, only one capacitance detecting module CTS is needed. In an embodiment of the present invention, the first detection value and the second detection value may be capacitance charge variations ΔQ1 and ΔQ2 detected from the first electrode 21 and/or the second electrode 22. By ΔQ1 and ΔQ2, that is, the amount of charge change from the capacitance is detected, the ratio of the resistances R1 and R2 can be calculated, and the position of the abscissa where the touch point is located and the position where the self-capacitance C1 is located can be calculated.
Step S402, detecting the sensing unit from both ends of the sensing unit to obtain a first detection value and a second detection value. In this embodiment, the detection may be performed while charging or during discharging. In the above example, the first detected value and the second detected value are ΔQ1 and ΔQ2, respectively. Hereinafter, the first detection value and the second detection value are described as an example of the amount of charge change, but other detection values capable of reflecting the relationship between the first resistor R1 and the second resistor R2, such as a level signal, a current, and the like, may also be employed. In the embodiment of the present invention, the detection from the first electrode 21 and the second electrode 22 may be performed simultaneously or separately.
In one embodiment of the present invention, if the detection is performed simultaneously, two capacitance detecting modules CTS are required to simultaneously detect the first electrode 21 and the second electrode 22, so the control wafer includes one or two capacitance detecting modes. Group CTS.
In another embodiment of the present invention, a capacitance detecting module CTS can also be used for detecting. Referring to step S401, after the self-capacitance C1 is filled by the first electrode 21, the capacitance detecting module CTS passes the first The electrode 21 detects the self capacitance C1. Then, the self-capacitance C2 is charged by the second electrode 22, and then the capacitance detecting module CTS detects the self-capacitance C1 through the second electrode 22.
Since the control chip scans the sensing unit with the same phase and level signals, the charge when charging the same self-capacitance C1 is equal to the inverse of their resistance. It is assumed that the amount of change in charge obtained by detecting the sensing unit from the first electrode 21 and the second electrode 22 of the sensing unit is ΔQ1 and ΔQ2, respectively. In the embodiment of the present invention, the capacitance detecting module CTS can be a currently known capacitance detecting module CTS. In one embodiment of the present invention, if two capacitance detecting modules CTS are used, since the two capacitance detecting modules CTS can share a plurality of devices, the overall power consumption of the control wafer is not increased.
Step S403, determining whether the sensing unit is touched according to the first detection value and the second detection value. Specifically, in one embodiment of the present invention, whether or not the touch is touched can be determined by judging whether or not the charge change amounts ΔQ1 and ΔQ2 are greater than a threshold. Of course, in other embodiments of the present invention, other manners of determining may be set, such as determining whether the amount of charge change ΔQ1 and ΔQ2 is less than a threshold, and if so, determining that the sensing unit is touched. Similarly, the threshold also needs to be determined according to the size and type of the touch detecting element, and the size of the sensing unit.
Step S404, if it is determined that the sensing unit is touched, then further calculating a first resistance between the first electrode 21 and the self-capacitance in the corresponding sensing unit and the second electrode 22 and the self-capacitance The proportional relationship between the second resistors. And determining a touch position of the touch object (eg, a finger) according to a proportional relationship between the first resistance and the second resistance. In an embodiment of the invention, the proportional relationship between the first resistance and the second resistance is the first obtained by detecting from the first electrode 21 and/or the second electrode 22 when charging/discharging the self-capacitance The proportional relationship between the detected value and the second detected value is calculated. As above, the coordinate on the sensing unit where C1 is located is ΔQ2/(ΔQ1+∆Q2).
In an embodiment of the invention, if the sensing body of the sensing unit is substantially U-shaped or substantially L-shaped, the position of the touch on the sensing body can be determined by the ratio between the first resistance and the second resistance, which will be combined below. Specific examples are detailed. However, in other embodiments of the present invention, if the sensing body is substantially rectangular, step S404 can only calculate the touch position in the first direction on the sensing body of the sensing unit, and the first direction can be the length of the sensing body. Direction (for example, the level of the sensing unit).
If the sensing body is rectangular, it is also necessary to determine the touch position in the second direction. In an embodiment of the invention, the first direction is the length direction of the sensing body, and the second direction is a direction perpendicular to the first direction, and the sensing body level setting or vertical setting.
Specifically, the centroid algorithm can be used to calculate the touch position of the touch point in the second direction. The following describes the centroid algorithm briefly.
In slider and touchpad applications, it is often desirable to determine the position of a finger (or other capacitive object) above the intrinsic spacing of a particular sensing unit. The contact area of the finger on the slider or touchpad is usually larger than any of the sensing units. In order to use a center to calculate the position after the touch, the array is scanned to verify that the given sensor position is valid, and the requirement for a certain number of adjacent sensing unit signals is greater than the preset touch threshold. After finding the strongest signal, this signal and those adjacent to the touch threshold are used in the calculation center:

Where N _Cent is the label of the sensing unit at the center, n is the number of sensing units that are touched, and i is the serial number of the touched sensing unit, where i is greater than or equal to 2.
For example, when the finger touches the first channel, the capacitance change amount is y1, the capacitance change amount on the second channel is y2, and the capacitance change amount on the third channel is y3. The second channel y2 capacitance changes the most. The Y coordinate can be regarded as:

The embodiment of the first aspect of the present invention proposes a touch detecting element in accordance with the above idea. The touch detecting element 100 according to an embodiment of the present invention is described below with reference to FIGS. 6-41.
The touch detecting element 100 according to an embodiment of the present invention includes a substrate 1 and a plurality of sensing units 2. A plurality of sensing units 2 are disposed on the substrate 1 and do not intersect each other. In an embodiment of the invention, preferably, the disjoint sensing units 2 may be parallel to each other. Alternatively, the disjoint sensing units 2 may also be partially parallel, but at least on the substrate 1 the sensing units 2 do not intersect each other. However, it should be noted that, for the plurality of sensing units 2, the structure shown in FIG. 5 is not limited, and the sensing unit 2 may adopt other structures, for example, part or all of the sensing unit 2 has a certain curvature. Etc., these can be applied to the present invention.
Optionally, the substrate 1 is generally rectangular. Here, "substantially rectangular" is understood to mean that the opposite sides of the substrate 1 may be absolutely parallel, for example, may be at a small angle, and each side of the substrate 1 may not be absolutely straight. Each of the sensing units 2 includes an inductive body 20 and a first electrode 21 and a second electrode 22 connected to the inductive body 20, respectively. The first electrode 21 and the second electrode 22 are respectively connected to corresponding pins of the control wafer 200. The sensing body 20 has a plurality of hollow portions 24 arranged in a predetermined regularity to define a current path portion 25 for increasing the resistance R between the first electrode 21 and the second electrode 22 on the sensing body 20. This current path portion 25 is used for current travel. Preferably, the hollow portion 24 penetrates in the thickness direction of the induction body 20. Since the thickness of the induction body 20 is relatively small, the hollow portion 24 penetrates the induction body 20 to facilitate fabrication and production.
By providing the hollow portion 24 on the inductive body 20, the path of the current path portion 25 of the entire inductive body 20 can be made thinner or longer, which corresponds to an increase in L or a decrease in h in the formula of R=P*L/h, so that The resistance R between the one electrode 21 and the second electrode 22 becomes large, so that the magnitude of the resistance whose detection accuracy satisfies the requirements is obtained, thereby improving the linearity of the induction. Among them, the size and density of the hollow pattern or line will affect the size of the resistor R. In order not to affect the self-capacitance, the hollow pattern or the line is as thin as possible, because the relative area of the finger contacting the sensing body is increased to increase the self-capacitance, and if the hollow pattern or the line is too thick, the finger and the sensing body are reduced. The relative area, which affects the amount of self-capacitance change of the finger touch.
It is to be understood that in the description of the present invention, the arrangement of the plurality of hollow portions 24 in a predetermined regular manner should be understood in a broad sense, that is, the plurality of hollow portions 24 are arranged on the sensing body 20 in an array of a predetermined shape. For example, optionally, the plurality of hollow portions 24 may be arranged in a linear array spaced apart from each other along the length of the sensing body 20; alternatively, the plurality of hollow portions 24 include two types alternately disposed in the longitudinal direction of the sensing body. The hollowed out part of the shape. In particular, the sensing body 20 and the hollow portion 24 will be described in detail in the various embodiments below.
In one embodiment of the invention, the sensing body 20 is generally rectangular and has a first end (ie, the left end of the rectangle in the figure) and a second end (ie, the right end of the rectangle in the figure), the first electrode 21 and the sensing body 20 The first ends are connected and the second electrode 22 is connected to the second end of the sensing body 20. In this embodiment, due to the pattern rule of the rectangular structure, the linearity is good when the finger is moved laterally or longitudinally. In addition, the spacing between the two rectangular structures can be the same, which is convenient for calculation, thereby increasing the calculation speed.
In an embodiment of the present invention, preferably, the hollow portions 24 are evenly spaced apart. For example, when the sensing body 20 is rectangular, the hollow portions 24 are evenly spaced along the length direction of the sensing body 20, which may also be referred to as The hollow portion 24 is evenly spaced along the direction in which the current path portion 25 extends on the inductive body 20, whereby linearity can be increased, calculation is facilitated, and calculation speed and accuracy are improved.
In another embodiment of the present invention, the sensing body 20 includes a first body portion 201 and a second body portion 202. The first body portion 201 and the second body portion 202 may each be rectangular and are referred to as a predetermined angle, such as the first body. The portion 201 and the second body portion 202 may be orthogonal to each other to be formed into a substantially L shape (hereinafter simply referred to as an L-shaped sensing body), and the second end of the first body portion 201 is connected to the first end of the second body portion 202, An electrode 21 is connected to the first end of the first body portion 201 and the second electrode 22 is connected to the second end of the second body portion 202. As described above, the first body portion 201 and the second body portion 202 may be orthogonal to each other. Thereby, the sensing unit design is made more regular, thereby improving the coverage of the touch detecting element, and also improving the linearity of the detection. Alternatively, the first body portion 201 and the second body portion 202 are the same in size, so that the operation speed can be improved.
In still another embodiment of the present invention, the sensing body 20 includes first to third body portions 201, 202, 203. The first body portion 201 and the second body portion 202 are respectively connected to the two ends of the third body portion 203 and located on the same side of the third body portion 203, and the first body portion 201 and the second body portion 202 and the third body portion respectively 203 is a predetermined angle. Preferably, the first to third body portions 201, 202, 203 may all be rectangular, and the first body portion 201 and the second body portion 202 are orthogonal to the third body portion 203, respectively (hereinafter referred to as a substantially U-shaped sensing body). . The first electrode 21 is connected to the first end of the first body portion 201 and the second electrode 22 is connected to the second end of the second body portion 202. Thereby, the sensing unit design is made more regular, thereby improving the coverage of the touch detecting element, and the linearity of detection can be improved. Alternatively, the first body portion 201 and the second body portion 202 are the same in size, so that the operation speed can be improved.
The description will first be made with reference to the touch detecting element 100 having the substantially rectangular sensing body 20 according to an embodiment of the present invention with reference to the description of Figs. 6-17.
The sensing body 20 has a first end and a second end. The first electrode 21 is connected to the first end of the sensing body 20, the second electrode 22 is connected to the second end of the sensing body 20, and the current path portion 25 extends in a curved manner. Between the first and second ends, the length L of the current path portion 25 in the extending direction of the current path portion 25 is larger than the length of the sensing body 20, that is, the flow length of the current is increased, thereby increasing the resistance of the sensing body 20. For example, when the sensing body 20 is rectangular, the length direction thereof is the direction from the first end to the second end. As shown in FIGS. 7-10, the first electrode 21 is connected to the first end of the sensing body 20 (ie, rectangular in the figure). The left end 22 is connected to the second end of the sensing body 20 (i.e., the right end of the rectangle in the figure), wherein the current flow direction is as indicated by the arrow in the figure.
According to the touch detecting element 100 of the embodiment of the present invention, by providing the hollow portion 24 on the sensing body 20, the path of the current path portion 25 is made longer, thereby increasing L in the formula of R=P*L/h, thereby making the first The electric resistance R between the one electrode 21 and the second electrode 22 becomes large, thereby increasing the linearity of induction.
Embodiment 1,
In the present embodiment, the plurality of hollow portions 24 are divided into a first group 24a and a second group 24b which are linearly arranged in the extending direction, and the hollow portion 24a in the first group and the hollow portion 24b in the second group are in the extending direction. Alternately arranged and partially overlapping in a direction orthogonal to the direction of extension, in other words, each of the hollow portions 24a in the first group is disposed between adjacent two hollow portions 24b in the second group, in the first group The hollow portion 24a extends from the upper edge of the sensing body 20 toward the lower edge of the sensing body 20 in the width direction of the sensing body 20, and the hollow portion 24a in the first group is spaced apart from the lower edge of the sensing body 20, in the second group The hollow portion 24b extends from the lower edge of the sensing body 20 toward the upper edge of the sensing body 20 in the width direction of the sensing body 20, and the hollow portion 24b in the second group is spaced apart from the upper edge of the sensing body 20, in the first group The sum of the lengths of the hollow portions 24a and the hollow portions 24b in the second group is larger than the width of the sensing body 20 and partially overlaps as seen from the longitudinal direction of the sensing body 20.
In the first example of the embodiment of the present invention, each of the hollow portions 24 may be rectangular as shown in FIG. That is, in these examples, the first group of hollow portions 24a and the second group of hollow portions 24b are respectively a plurality of spaced apart rectangles, alternately arranged in the left-right direction and partially overlapped in the up-and-down direction. The vertical direction is orthogonal to the direction in which the current path portion 25 extends. Of course, the invention is not limited thereto, and in other examples, each hollow portion 24 may also be generally I-shaped or generally H-shaped, not shown.
In some examples of embodiments of the invention, each of the first set of hollow portions 24a is generally inverted T-shaped, and each of the second set of hollow portions 24b is generally T-shaped. That is, as shown in Fig. 7, the substantially inverted T-shaped hollow portions 24a of the first group are spaced apart from each other in the left-right direction, and the substantially T-shaped hollow portions 24b of the second group are spaced apart from each other in the left-right direction. And the hollow portions 24a in the first group are alternately arranged and partially overlapped in the up and down direction.
Optionally, the upper end of the first set of hollow portions 24a is connected to the upper edge of the sensing body 20, and the lower end of the second set of hollow portions 24b is connected to the lower edge of the sensing body 20, when the control wafer 200 is directed to the first electrode 21 And/or the current direction generated by the application of the level signal by the second electrode 22 is as indicated by the arrow in FIG. 7, the current flows along the curve, so that the path of the current path portion 25 is longer, thereby increasing R=P*L/ L in the formula h further increases the resistance R between the first electrode 21 and the second electrode 22. Of course, the invention is not limited thereto. Optionally, the upper end of the first set of hollow portions 24a may also be coupled to the lower edge of the sensing body 20, and the lower ends of the second set of hollow portions 24b are correspondingly coupled to the upper edge of the sensing body 20 (not shown).
In still other examples of embodiments of the present invention, each of the first set of hollow portions 24a is generally L-shaped, and each of the second set of hollow portions 24b is generally inverted L-shaped, the first set of hollow portions 24a and the second set of hollow portions 24b constitute a plurality of pairs, and the substantially L-shaped hollow portion 24a and the substantially inverted L-shaped hollow portion 24b of each pair of hollow portions 24 are opposed to each other, intersect in the extending direction, and are orthogonal to the The directions of the extension directions partially overlap. That is, as shown in Fig. 8, the substantially L-shaped hollow portions 24a in the first group are spaced apart from each other in the left-right direction, and the substantially inverted L-shaped hollow portions 24b in the second group are spaced apart from each other in the left-right direction. And intersecting with the hollow portion 24a in the first group to form a plurality of pairs of hollow portions opposed to each other, and the hollow portions 24a and 24b in each pair partially overlap in the up and down direction.
Here, it can be understood that the term "cross setting" refers to a substantially L-shaped hollow portion 24a in each pair of hollow portions and a second branch of the substantially inverted L-shaped hollow portion 24b (ie, the horizontal branch in FIG. 8). Projections partially spaced apart from each other in the width direction (up and down direction in FIG. 8) of the induction body 20 and on a plane orthogonal to the width direction of the induction body 20 (horizontal plane in FIG. 8) are partially overlapped. "Partially overlapping in a direction orthogonal to the extending direction" means that the first L-shaped hollow portion 24a and the first branch of the substantially inverted L-shaped hollow portion 24b (the vertical branch in FIG. 8) are in the sensing body 20 Partially overlapping in the width direction.
Optionally, the upper end of the first set of hollow portions 24a is connected to the upper edge of the sensing body 20, and the lower end of the second set of hollow portions 24b is connected to the lower edge of the sensing body 20, when the control wafer 200 is directed to the first electrode 21 And/or the current direction generated by the application of the level signal by the second electrode 22 is as indicated by the arrow in FIG. 8, the current flows along the curve, so that the path of the current path portion 25 is longer, thereby increasing R=P*L/ L in the formula h further increases the resistance R between the first electrode 21 and the second electrode 22. Of course, the invention is not limited thereto. Optionally, the upper end of the first set of hollow portions 24a may also be coupled to the lower edge of the sensing body 20, and the lower ends of the second set of hollow portions 24b are correspondingly coupled to the upper edge of the sensing body 20 (not shown).
In some examples of embodiments of the present invention, the hollow portion 24a in the first group is generally inverted V-shaped, and the hollow portion 24b in the second group is generally V-shaped, and each hollow portion 24a in the first group is in the extending direction The upper two branches of the adjacent two hollow portions 24b in the second group are spanned. That is, as shown in Fig. 9, the substantially inverted V-shaped hollow portions 24a in the first group are spaced apart from each other in the left-right direction, and the substantially V-shaped hollow portions 24b in the second group are mutually in the left-right direction. Interspersed and alternately arranged with the hollow portions 24a in the first group such that the hollow portions 24a in the first group straddle the two branches of the adjacent two hollow portions 24b in the second group located below in the left-right direction .
The upper end of the first group of hollow portions 24a is connected to the upper edge of the sensing body 20, and the lower end of the second group of hollow portions 24b is connected to the lower edge of the sensing body 20. At this time, when the control wafer 200 is directed to the first electrode 21 and / Or the current direction generated by applying the level signal to the second electrode 22 is as indicated by the arrow in FIG. 9, and the current flows along the curve, so that the path of the current path portion 25 is longer, thereby increasing the formula of R=P*L/h. The middle L further increases the resistance R between the first electrode 21 and the second electrode 22.
In some examples of embodiments of the present invention, each of the first set of hollow portions 24a is generally inverted F-shaped, and each of the second set of hollow portions 24b is generally F-shaped, and the first set of hollow portions 24a and the second set of hollow portions 24b constitute a plurality of pairs, and the substantially F-shaped hollow portions in each pair of hollow portions 24 intersect with the substantially inverted F-shaped hollow portions in the extending direction and in a direction orthogonal to the extending direction Partial overlap. That is, as shown in Fig. 10, the substantially inverted F-shaped hollow portions 24a of the first group are spaced apart from each other in the left-right direction, and the substantially F-shaped hollow portions 24b of the second group are spaced apart from each other in the left-right direction. And intersecting with the hollow portion 24a in the first group to form a plurality of pairs of hollow portions opposed to each other, and the hollow portions 24a and 24b in each pair partially overlap in the up and down direction.
Here, it can be understood that the term "cross setting" refers to a substantially inverted F-shaped hollow portion 24a in each pair of hollow portions and a second branch of the substantially F-shaped hollow portion 24b (ie, the level in FIG. 10) The branches are alternately spaced apart from each other in the width direction of the sensing body 20, and are projected on a plane orthogonal to the width direction of the sensing body 20 (up and down direction in FIG. 10) (horizontal plane in FIG. 10) Partial overlap. In other words, for each pair of hollow portions, each short branch portion of the hollow portion 24a is inserted between adjacent short branches of the hollow portion 24b.
Optionally, the upper end of the first set of hollow portions 24a is connected to the upper edge of the sensing body 20, and the lower end of the second set of hollow portions 24b is connected to the lower edge of the sensing body 20, when the control wafer 200 is directed to the first electrode 21 And/or the current direction generated by the application of the level signal by the second electrode 22 is as indicated by the arrow in FIG. 10, the current flows along the curve, so that the path of the current path portion 25 is longer, thereby increasing R=P*L/ L in the formula h further increases the resistance R between the first electrode 21 and the second electrode 22. Of course, the invention is not limited thereto. Optionally, the upper end of the first set of hollow portions 24a may also be coupled to the lower edge of the sensing body 20, and the lower ends of the second set of hollow portions 24b are correspondingly coupled to the upper edge of the sensing body 20 (not shown).
Embodiment 2,
In this embodiment, the sensing body 20 has a first end and a second end, the first electrode 21 is connected to the first end of the sensing body 20, and the second electrode 22 is connected to the second end of the sensing body 20, and the current path portion 25 The length L of the current path portion 25 is extended in a curved manner between the first and second ends so as to be longer than the length of the sensing body 20 in the extending direction of the current path portion 25.
Wherein, the current path portion 25 extends between the first end and the second end and has a cross-sectional area on a plane orthogonal to the extending direction thereof smaller than a cross-sectional area of the sensing body 20 in a plane, in other words, the current path portion 25 is up and down. The width h in the direction is smaller than the width of the sensing body 20. For example, when the sensing body 20 is rectangular, the length direction thereof is the direction from the first end to the second end. As shown in FIGS. 10-14, the first electrode 21 is connected to the first end of the sensing body 20 (ie, the rectangle in the figure). The left end 22 is connected to the second end of the sensing body 20 (i.e., the right end of the rectangle in the figure), wherein the current flow direction is as indicated by the arrow in the figure.
According to the touch detecting element 100 of the embodiment of the present invention, by providing the hollow portion 24 on the sensing body 20, the path of the current path portion 25 is made longer and the width is reduced, that is, the formula of R=P*L/h is added. The length L is simultaneously reduced by the width h, thereby increasing the resistance R between the first electrode 21 and the second electrode 22, thereby increasing the linearity of induction.
In an example of an embodiment of the present invention, the current path portion 25 is adjacent to one side of the sensing body 20 that extends in the extending direction. Alternatively, as shown in Figures 11 and 12, the hollow portion 24 is generally T-shaped or generally inverted L-shaped. Of course, the present invention is not limited thereto, and the hollow portion 24 may also have other shapes such as a generally rectangular shape, a substantially U shape, a substantially H shape, or a substantially I-shape (not shown). Alternatively, the current path portion 25 is adjacent to the upper side of the sensing body 20 and extends in the left-right direction, and the current flows as indicated by the arrows in FIGS. 11 and 12. Of course, the current path portion 25 may also be adjacent to the lower side of the sensing body 20 and extend in the left-right direction (not shown).
In another example of an embodiment of the present invention, the current path portion 25 is adjacent to a center line of the sensing body 20 that extends in the extending direction. Wherein, the plurality of hollow portions 24 are divided into a first group and a second group linearly arranged in the extending direction, and the first group of hollow portions 24a and the second group of hollow portions 24b constitute a plurality of pairs, in the first group of each pair The hollow portion 24a and the hollow portion 24b in the second group face each other in a direction orthogonal to the extending direction, and the current path portion 25 is defined between the first hollow portion 24a and the second group hollow portion 24b.
Specifically, the upper end of the first group of hollow portions 24a is connected to the upper edge of the sensing body 20, and the lower end of the second group of hollow portions 24b is connected to the lower edge of the sensing body 20. At this time, when the control wafer 200 is directed to the first electrode 21 and Or the current direction generated by applying the level signal to the second electrode 22 is as indicated by the arrows in FIGS. 13 and 14, the current flows along the curve, so that the width of the current path portion 25 in the up and down direction is reduced, that is, reduced. R in the formula of R = P * L / h, which in turn causes the resistance R between the first electrode 21 and the second electrode 22 to become large.
Optionally, each of the first set of hollow portions 24a is generally inverted T-shaped, and each of the second set of hollow portions 24b is substantially T-shaped, as shown in FIG. 13, for example, generally inverted T The shaped hollow portion 24a includes a generally first arm and a generally vertical second arm, as will be understood by those of ordinary skill in the art, the first arm can also be offset from the level by a predetermined angle and the second arm can be upright The direction deviates from a predetermined angle (not shown).
Optionally, each of the first set of hollow portions 24a is generally L-shaped, and each of the second set of hollow portions 24b is generally inverted L-shaped, as shown in FIG. For example, the generally L-shaped hollow portion 24a includes a generally first arm and a generally vertical second arm, as will be understood by those of ordinary skill in the art, the first arm can also be offset from the level by a predetermined angle and the second arm It may be offset from the vertical direction by a predetermined angle (not shown).
Of course, the invention is not limited thereto. In some examples of the present invention, the first group of hollow portions 24a and the second group of hollow portions 24b opposed to each other may have other shapes as long as the width of the current path portion 25 is reduced in the up and down direction, for example, generally Rectangular, generally U-shaped (for example, a U-shaped closed end, or a U-shaped closed end), and is also, for example, H-shaped or I-shaped, wherein the H-shaped or I-shaped hollow portion includes a substantially parallel first The arm and the second arm and the third arm coupled between the first arm and the second arm may also be, for example, of other shapes (not shown).
Embodiment 3,
In the present embodiment, the current path portion 25 is two, one of the current path portions 25 is adjacent to one side of the sensing body 20 extending in the extending direction, and the other current path portion 25 is adjacent to the extending direction of the sensing body 20 The other side. Thereby, the total length of the current path portion 25, that is, the length of the flow path of the current is increased and the width is decreased. For example, when the sensing body 20 is rectangular, as shown in FIGS. 15-17, one of the current path portions 25 is adjacent to the upper side of the sensing body 20 and extends in the left-right direction, and the other current path portion 25 is adjacent to the lower side of the sensing body 20 and Extends in the left and right direction.
Alternatively, the plurality of hollow portions 24 are linearly arranged in the extending direction, and each of the hollow portions 24 is substantially X-shaped as shown in FIG. Of course, the invention is not limited thereto. In some examples of the present invention, the plurality of hollow portions 24 linearly arranged along the extending direction may also have other shapes, such as a generally rectangular shape, a generally U-shape (not shown), a generally H-shape (as shown in FIG. 17), or Other shapes such as a substantially I-shape (as shown in FIG. 16), or a combination of the above various shapes, may be sufficient as long as the upper and lower current path portions are formed on the sensing body 20.
According to the touch detecting element 100 of the embodiment of the present invention, by providing the hollow portion 24 on the sensing body 20, the path of the current path portion 25 is made longer and the width is reduced, that is, the formula of R=P*L/h is added. The length L is simultaneously reduced by the width h, thereby increasing the resistance R between the first electrode 21 and the second electrode 22, thereby increasing the linearity of induction.
According to the touch detecting component 100 of the above embodiment of the present invention, the parallel rectangular sensing body 20 can be used to reduce the structural complexity of the device, so that the manufacturing cost can be reduced on the basis of ensuring the detection accuracy.
A touch detecting element 100 according to various embodiments of the present invention having an L-shaped sensing body 20 will be described below with reference to FIGS. 18-29.
The L-shaped sensing body 20 has a first end (such as an L-shaped upper end in FIGS. 18-29) and a second end (such as an L-shaped lower end in FIGS. 18-29), the length direction of which is from the first end to the first end At the two ends, the first electrode 21 is connected to the first end of the inductive body 20, the second electrode 22 is connected to the second end of the inductive body 20, and the current path portion 25 extends in a curved manner between the first and second ends for The length L of the current path portion 25 in the extending direction of the current path portion 25 (i.e., the longitudinal direction of the L-shaped sensing body) is larger than the length of the sensing body 20, and the current flow direction is indicated by an arrow in Figs. 18-29. According to the touch detecting element 100 of the embodiment of the present invention, by providing the hollow portion 24 on the L-shaped sensing body 20, the path of the current path portion 25 is made longer, thereby increasing L in the formula of R=P*L/h, and further The resistance R between the first electrode 21 and the second electrode 22 is made larger, thereby increasing the linearity of induction.
For the sake of clarity, in the following description, the first body portion 201 of the L-shaped sensing body 20 is horizontally extended and the second body portion 202 is vertically extended as an example, that is, the extension of the first body portion 201 The direction is the left-right direction in FIGS. 18-29, and the direction orthogonal to the extending direction is the up-and-down direction in the drawing; the extending direction of the second body portion 202 is the up-and-down direction in FIGS. 18-29, and the extending direction The orthogonal directions are the left and right directions in the figure.
Embodiment 4,
In the present embodiment, the plurality of hollow portions 24 are divided into a first group 24a and a second group 24b which are linearly arranged in the extending direction, and the hollow portion 24a in the first group and the hollow portion 24b in the second group are in the extending direction. Alternately arranged and partially overlapping in a direction orthogonal to the direction of extension.
In the first example of the embodiment of the present invention, each of the hollow portions 24 is rectangular as shown in Fig. 18. That is, in these examples, the first group of hollow portions 24a and the second group of hollow portions 24b are respectively a plurality of spaced apart rectangles and are alternately arranged in the longitudinal direction of the L-shaped sensing body and perpendicular to the length direction. Partially overlapping in the direction, in other words, on the first body portion 201, the first group of hollow portions 24a and the second group of hollow portions 24b are alternately arranged in the left-right direction and partially overlapped in the up-and-down direction, on the second body portion 202 The first group of hollow portions 24a and the second group of hollow portions 24b are alternately arranged in the up and down direction and partially overlapped in the left and right direction. Of course, the invention is not limited thereto, and in other examples, each hollow portion 24 may also be generally I-shaped or generally H-shaped, not shown.
In some examples of embodiments of the invention, each of the first set of hollow portions 24a is generally inverted T-shaped, and each of the second set of hollow portions 24b is generally T-shaped. That is, as shown in Fig. 19, the substantially inverted T-shaped hollow portions 24a in the first group are spaced apart from each other in the longitudinal direction of the L-shaped sensing body, and the substantially T-shaped hollow portions 24b in the second group They are spaced apart from each other in the longitudinal direction of the L-shaped sensing body and alternately arranged with the hollow portions 24a in the first group and partially overlap in the direction perpendicular to the longitudinal direction. In other words, on the first body portion 201, the first group of hollow portions 24a and the second group of hollow portions 24b are alternately arranged in the left-right direction and partially overlapped in the up-and-down direction. At this time, the upper end of the first group of hollow portions 24a and the first portion The upper edge of a body portion 201 is coupled, and the lower end of the second set of hollow portions 24b is coupled to the lower edge of the first body portion 201. On the second body portion 202, the first group of hollow portions 24a and the second group of hollow portions 24b are alternately arranged in the up and down direction and partially overlapped in the left and right direction. At this time, the right end of the first group hollow portion 24a is connected to the right edge of the first body portion 201, and the left end of the second group hollow portion 24b is connected to the left edge of the first body portion 201.
Thereby, the current generated when the control wafer 200 applies the level signal to the first electrode 21 and/or the second electrode 22 flows along the curve, so that the path of the current path portion 25 is longer, thereby increasing R = P * L / L in the formula h further increases the resistance R between the first electrode 21 and the second electrode 22.
In still other examples of embodiments of the present invention, each of the first set of hollow portions 24a is generally L-shaped, and each of the second set of hollow portions 24b is generally inverted L-shaped, the first set of hollow portions 24a and the second set of hollow portions 24b constitute a plurality of pairs, and the substantially L-shaped hollow portion 24a and the substantially inverted L-shaped hollow portion 24b of each pair of hollow portions 24 are opposed to each other, intersect in the extending direction, and are orthogonal to the The directions of the extension directions partially overlap. That is, as shown in Fig. 20, the substantially L-shaped hollow portions 24a in the first group are spaced apart from each other in the longitudinal direction of the L-shaped sensing body, and the substantially inverted L-shaped hollow portions 24b in the second group are in the length. The directions are spaced apart from each other and are arranged to cross the hollow portions 24a in the first group to form a plurality of pairs of hollow portions opposed to each other, and the hollow portions 24a and 24b in each pair partially overlap in a direction perpendicular to the longitudinal direction. In other words, on the first body portion 201, the hollow portions 24a and 24b of each pair are arranged to intersect in the left-right direction and partially overlap in the up-and-down direction. At this time, the upper end of the first group of hollow portions 24a and the first body portion 201 The upper edges are connected, and the lower ends of the second set of hollow portions 24b are connected to the lower edge of the first body portion 201. On the second body portion 202, the hollow portions 24a and 24b in each pair are arranged to intersect in the up and down direction and partially overlap in the left and right direction. At this time, the right end of the first group hollow portion 24a is connected to the right edge of the first body portion 201, and the left end of the second group hollow portion 24b is connected to the left edge of the first body portion 201.
Here, it is to be understood that the term "partially overlapping" means that in the first body portion 201, the first branch of the hollow portions 24a and 24b in each pair (the vertical branch in Fig. 20) is in the left-right direction The projections are spaced apart and their projections on the plane orthogonal to the left-right direction (the vertical plane in Fig. 20) overlap; in the second body portion 202, the first branches of the hollow portions 24a and 24b in each pair ( The vertical branches in Fig. 20 are spaced apart in the up and down direction and their projections on the plane orthogonal to the up and down direction (the horizontal plane in Fig. 20) partially overlap.
Further, it is to be understood that the term "cross setting" means that in the first body portion 201, the second branch of the hollow portions 24a and 24b in each pair (the leveling branch in Fig. 20) is spaced in the up and down direction The projections on the plane orthogonal to the up and down direction (the horizontal plane in FIG. 20) partially overlap; in the second body portion 202, the second branch of the hollow portions 24a and 24b in each pair (Fig. 20) The vertical branches are spaced apart in the left-right direction and their projections on the plane orthogonal to the left-right direction (the vertical plane in Fig. 20) partially overlap.
Thus, when the control wafer 200 applies a level signal to the first electrode 21 and/or the second electrode 22 to generate a current direction as indicated by an arrow in FIG. 20, the current flows along the curve so that the path of the current path portion 25 It is longer, thereby increasing L in the formula of R = P * L / h, thereby making the resistance R between the first electrode 21 and the second electrode 22 large.
In still other examples of embodiments of the present invention, the hollow portion 24a in the first group is generally inverted V-shaped, and the hollow portion 24b in the second group is generally V-shaped, and each of the hollow portions 24a in the first group is extended The two adjacent branches of the adjacent two hollow portions 24b in the second group are traversed in the direction. That is, as shown in Fig. 21, on the first body portion 201, the substantially inverted V-shaped hollow portions 24a in the first group are spaced apart from each other on the left and right, and the substantially V-shaped hollow portions in the second group 24b are spaced apart from each other in the left-right direction and alternately arranged with the hollow portions 24a in the first group such that the hollow portions 24a in the first group straddle two adjacent hollows in the second group located below in the left-right direction Two branches of the portion 24b. On the second body portion 202, the generally inverted V-shaped hollow portions 24a of the first group are spaced apart from each other, and the substantially V-shaped hollow portions 24b of the second group are spaced apart from each other in the up and down direction and are first The hollow portions 24a in the group are alternately arranged such that the hollow portions 24a in the first group straddle the two branches of the adjacent two hollow portions 24b in the second group on the left side thereof in the up and down direction.
Thus, when the control wafer 200 applies a level signal to the first electrode 21 and/or the second electrode 22 to generate a current direction as indicated by an arrow in FIG. 21, the current flows along the curve so that the path of the current path portion 25 It is longer, thereby increasing L in the formula of R = P * L / h, thereby making the resistance R between the first electrode 21 and the second electrode 22 large.
In still other examples of embodiments of the present invention, each of the first set of hollow portions 24a is generally inverted F-shaped, and each of the second set of hollow portions 24b is generally F-shaped, and the first set of hollows The portion 24a and the second set of hollow portions 24b constitute a plurality of pairs, and the substantially F-shaped hollow portion 24b of each pair of hollow portions 24 intersects with the substantially inverted F-shaped hollow portion 24a in the extending direction and is orthogonal to the extending direction The directions overlap partially. That is, as shown in Fig. 22, the substantially inverted F-shaped hollow portions 24a in the first group are spaced apart from each other in the longitudinal direction of the L-shaped sensing body, and the substantially F-shaped hollow portions 24b in the second group are in the L The shape sensing bodies are spaced apart from each other in the longitudinal direction and are arranged to intersect with the hollow portions 24a in the first group to form a plurality of pairs of hollow portions opposed to each other, and the hollow portions 24a and 24b in each pair are in a direction perpendicular to the longitudinal direction Partial overlap. In other words, on the first body portion 201, the hollow portions 24a and 24b of each pair are arranged to intersect in the left-right direction and partially overlap in the up-and-down direction. At this time, the upper end of the first group of hollow portions 24a and the first body portion 201 The upper edges are connected, and the lower ends of the second set of hollow portions 24b are connected to the lower edge of the first body portion 201. On the second body portion 202, the hollow portions 24a and 24b in each pair are arranged to intersect in the up and down direction and partially overlap in the left and right direction. At this time, the right end of the first group hollow portion 24a is connected to the right edge of the first body portion 201, and the left end of the second group hollow portion 24b is connected to the left edge of the first body portion 201.
In the present embodiment, the term "partially overlapping" means that in the first body portion 201, the first branch (the vertical branch in Fig. 22) of the hollow portions 24a and 24b in each pair is spaced in the left-right direction And their projections on the plane orthogonal to the left-right direction (the vertical plane in Fig. 22) partially overlap; in the second body portion 202, the first branch of the hollow portions 24a and 24b in each pair (the first The vertical branches in Fig. 22 are spaced apart in the up and down direction and their projections on the plane orthogonal to the up and down direction (the horizontal plane in Fig. 22) partially overlap.
In the present embodiment, the term "cross setting" means that in the first body portion 201, the second branch of the hollow portions 24a and 24b in each pair (the leveling branch in Fig. 22) is spaced apart in the up and down direction. And the projections on the plane orthogonal to the up and down direction (the horizontal plane in FIG. 22) partially overlap; in the second body portion 202, the second branch of the hollow portions 24a and 24b in each pair (the image in FIG. 22) The vertical branches are spaced apart in the left-right direction and their projections on the plane orthogonal to the left-right direction (the vertical plane in Fig. 22) partially overlap. In other words, for the hollow portions 24a and 24b in each pair, each short branch portion of the hollow portion 24a is inserted between adjacent short branches of the hollow portion 24b.
Thus, when the current direction generated by the control wafer 200 applying the level signal to the first electrode 21 and/or the second electrode 22 is as indicated by the arrow in FIG. 22, the current flows along the curve so that the path of the current path portion 25 It is longer, thereby increasing L in the formula of R = P * L / h, thereby making the resistance R between the first electrode 21 and the second electrode 22 large.
Embodiment 5,
In this embodiment, the sensing body 20 has a first end and a second end, the first electrode 21 is connected to the first end of the sensing body 20, and the second electrode 22 is connected to the second end of the sensing body 20, and the current path portion 25 The length L of the current path portion 25 is extended in a curved manner between the first and second ends so as to be longer than the length of the sensing body 20 in the extending direction of the current path portion 25. Wherein, the cross-sectional area of the current path portion 25 extending between the first end and the second end and in a plane orthogonal to the extending direction thereof is smaller than the cross-sectional area of the sensing body 20 on the plane, in other words, in the first body portion 201 The width h of the current path portion 25 in the vertical direction is smaller than the width of the inductor body 20. On the second body portion 202, the width h of the current path portion 25 in the left-right direction is smaller than the width of the sensing body 20.
According to the touch detecting element 100 of the embodiment of the present invention, by providing the hollow portion 24 on the sensing body 20, the path of the current path portion 25 is made longer and the width is reduced, that is, the equation of R=P*L/h is added. The length L is simultaneously reduced by the width h, thereby increasing the resistance R between the first electrode 21 and the second electrode 22, thereby increasing the linearity of induction.
In an example of an embodiment of the present invention, the current path portion 25 is adjacent to one side of the sensing body 20 that extends in the extending direction. Alternatively, as shown in Figures 23 and 24, the hollow portion 24 is generally T-shaped or inverted L-shaped. Of course, the present invention is not limited thereto, and the hollow portion 24 may also have other shapes such as a rectangle, a substantially U shape, an H shape, or an I-shape (not shown). Optionally, on the first body portion 201, the current path portion 25 is adjacent to the upper side of the sensing body 20 and extends in the left-right direction. On the second body portion 202, the current path portion 25 is adjacent to the right side of the sensing body 20 and is in the up and down direction. The current flow is shown as the direction of the arrows in Figs. 23 and 24. Of course, the present invention is not limited thereto. In another example, on the first body portion 201, the current path portion 25 may also be adjacent to the lower side of the sensing body 20 and extend in the left-right direction. On the second body portion 202, the current The passage portion 25 is adjacent to the left side of the sensing body 20 and extends in the up and down direction, not shown.
In another example of an embodiment of the present invention, the current path portion 25 is adjacent to a center line of the sensing body 20 that extends in the extending direction. Wherein, the plurality of hollow portions 24 are divided into a first group and a second group linearly arranged in the extending direction, and the first group of hollow portions 24a and the second group of hollow portions 24b constitute a plurality of pairs, in the first group of each pair The hollow portion 24a and the hollow portion 24b in the second group face each other in a direction orthogonal to the extending direction, and the current path portion 25 is defined between the first hollow portion 24a and the second group hollow portion 24b.
Specifically, on the first body portion 201, the upper end of the first group of hollow portions 24a is connected to the upper edge of the sensing body 20, and the lower end of the second group of hollow portions 24b is connected to the lower edge of the sensing body 20, in the second body. In the portion 202, the right end of the first set of hollow portions 24a is connected to the right edge of the second body portion 202, and the left end of the second set of hollow portions 24b is connected to the left edge of the second body portion 202. At this time, when the control wafer 200 is oriented The current direction generated by applying the level signal to the first electrode 21 and/or the second electrode 22 is as indicated by the arrows in FIGS. 25 and 26, and the current flows along the curve so that the width of the current path portion 25 in the up and down direction is reduced. That is, h in the formula of R = P * L / h is reduced, thereby making the resistance R between the first electrode 21 and the second electrode 22 large.
Optionally, each of the first set of hollow portions 24a is generally inverted T-shaped, and each of the second set of hollow portions 24b is generally T-shaped, as shown in FIG. Optionally, each of the first set of hollow portions 24a is generally L-shaped, and each of the second set of hollow portions 24b is generally inverted L-shaped, as shown in FIG. Of course, the invention is not limited thereto. In some examples of the present invention, the first set of hollow portions 24a and the second set of hollow portions 24b opposite to each other may also have other shapes, such as rectangular, substantially U-shaped, H-shaped or I-shaped, and the like (not shown). It suffices that the width of the current path portion 25 can be reduced in the vertical direction.
Embodiment 6,
In the present embodiment, the current path portion 25 is two, one of the current path portions 25 is adjacent to one side of the sensing body 20 extending in the extending direction, and the other current path portion 25 is adjacent to the extending direction of the sensing body 20 The other side. As shown in FIGS. 27-29, on the first body portion 201, one of the current path portions 25 is adjacent to the upper side of the first body portion 201 and extends in the left-right direction, and the other current path portion 25 is adjacent to the first body portion 201. Left and extend in the left and right direction. On the second body portion 202, one current path portion 25 is adjacent to the right side of the second body portion 202 and extends in the up and down direction, and the other current path portion 25 is adjacent to the left side of the second body portion 202 and extends in the up and down direction.
Alternatively, the plurality of hollow portions 24 are linearly arranged in the extending direction, and each of the hollow portions 24 is substantially X-shaped as shown in FIG. Of course, the invention is not limited thereto. In some examples of the invention, the plurality of hollowed portions 24 linearly aligned along the direction of extension may also be other shapes, such as rectangular, generally U-shaped (not shown), H-shaped (as shown in Figure 28), or I-shaped. Other shapes, such as shown in FIG. 29, may be, for example, a combination of the above various shapes as long as the two current path portions are formed on the inductive body 20.
According to the touch detecting element 100 of the embodiment of the present invention, by providing the hollow portion 24 on the L-shaped sensing body 20, the path of the current path portion 25 is made longer and the width is reduced, that is, in the formula of R = P * L / h The length L is increased while the width h is decreased, thereby increasing the resistance R between the first electrode 21 and the second electrode 22, thereby increasing the linearity of induction.
The L-shaped sensing body 20 is used in the touch detecting component 100 in the embodiment of the present invention, which can effectively reduce noise and improve linearity of sensing. Not only is the structure simple, it is easy to manufacture and the production cost is reduced.
The touch sensing element 100 having the rectangular and L-shaped sensing body 20 has been described above with reference to FIGS. 6-29. However, after reading the above technical solutions, those skilled in the art can clearly understand the application of the solution. In the case of other shapes, such as a generally U-shaped sensing body 20, the touch sensing element 100 having the generally U-shaped sensing body 20 is therefore not described in detail herein.
It should be noted that, referring to FIGS. 30-41, the substantially U-shaped sensing body 20 includes first to third body portions 201, 202, and 203. The first to third body portions 201, 202, 203 may all be rectangular. For the sake of clarity, the first body portion 201 and the second body portion 202 of the substantially U-shaped sensing body 20 extend vertically and the third body portion 203 is horizontally extended, that is, the first body portion 201, The extending direction of the second body portion 202 is the up-and-down direction in the 30th to 41st directions, and the direction orthogonal to the extending direction is the left-right direction in the drawing. The extending direction of the third body portion 203 is the left-right direction in the 30th to 41st directions, and the direction orthogonal to the extending direction is the up-and-down direction in the drawing.
Wherein the third embodiment shows that the current path portion 25 extends in a curved manner between the first and second ends of the substantially U-shaped sensing body 20 so that the current path portion 25 extends in the direction in which the current path portion 25 extends. The length L is greater than the length of the sensing body 20. Thereby, L in the formula of R = P * L / h is increased, thereby making the resistance R between the first electrode 21 and the second electrode 22 large, thereby improving the linearity of induction.
35-38 illustrate that the current path portion 25 extends in a curved manner between the first and second ends such that the length L of the current path portion 25 is greater than the length of the sensing body 20 in the direction in which the current path portion 25 extends. And the cross-sectional area of the current path portion 25 extending between the first end and the second end and in a plane orthogonal to the extending direction thereof is smaller than the cross-sectional area of the sensing body 20 on the plane, so that the path of the current path portion 25 is longer. And the width is reduced. Thereby, L is added in the formula of R=P*L/h and h is decreased, thereby making the resistance R between the first electrode 21 and the second electrode 22 large, thereby improving the linearity of induction.
FIGS. 39-41 show two current path portions 25, one of which is adjacent to one side of the sensing body 20 extending in the extending direction, and the other current path portion 25 is adjacent to the edge of the sensing body 20. The other side of the direction extends. Thereby, the path of the current path portion 25 is made longer and the width is reduced, that is, the length L is increased in the formula of R=P*L/h while the width h is decreased, thereby increasing the first electrode 21 and the second electrode. The resistance R between 22, thereby increasing the linearity of the induction.
The touch sensing element 100 in the embodiment of the present invention adopts a substantially U-shaped sensing body 20, which is not only simple in structure, but also easy to manufacture, all the leads are on the same side, the design is convenient, the cost of the silver paste is reduced, and the production cost can be reduced.
In some embodiments of the present invention, the touch detecting component 100 may include a plurality of L-shaped sensing units or a substantially U-shaped sensing unit 2, that is, including a plurality of L-shaped sensing bodies or a generally U-shaped sensing body 20, such as 42nd and As shown in Fig. 43, each of the sensing bodies 20 has a different length, and the plurality of sensing bodies 20 are sequentially nested. In the embodiment of the present invention, the sequential nesting refers to the surrounding surrounding sensing body correspondingly surrounding the inner sensing body, which can achieve a large coverage while ensuring accuracy, and reduce the complexity of the operation and improve the touch. Detect the response speed of the component. Of course, those skilled in the art can also arrange the sensing bodies in other sequential nesting manners according to the ideas of FIGS. 42 and 43.
Optionally, the spacing between two adjacent sensing units 2 is equal, so that the two sides of the touch detecting component can be evenly divided by the plurality of sensing units 2, thereby improving the calculation speed and increasing the calculation speed, as shown in FIG. 42. Show.
Of course, in another embodiment of the present invention, the spacing between two adjacent sensing units 2 may also be unequal, as shown in FIG. 43, for example, because the user often touches the center of the touch detecting component 100, The pitch between the sensing units 2 at the center of the touch detecting element 100 is reduced, thereby improving the detection accuracy of the center portion.
It should be noted that the above-mentioned L-shaped sensing body or the generally U-shaped sensing door body 20 is a preferred embodiment of the present invention, which can obtain a large coverage, but other embodiments of the present invention can be applied to the 42nd and 43rd drawings. Some equivalent changes are made, for example, the first body portion 201 and the second body portion 202 in the generally U-shaped sensing body 20 may be non-parallel.
The sensing unit 2 in the touch detecting component 100 of the embodiment of the present invention adopts double-end detection, that is, both ends of the sensing unit 2 have electrodes, and each electrode is connected to a corresponding pin of the control chip 200, when performing touch detection. The positioning of the touch point can be achieved by the sensing unit 2 itself.
Advantageously, embodiments of the present invention achieve a determination of the touch location by calculating the ratio between the first resistor R1 and the second resistor R2, thus, as opposed to current rhombic or triangular designs, since there is no need to calculate from the determination of the touch location The size of the capacitor, and the size of the self-capacitance does not affect the accuracy of the touch position, and the dependence on the accuracy of the self-capacitance detection is reduced, thereby improving the measurement accuracy and improving the linearity. Further, since any one of the first to third body portions of the embodiment of the present invention may have a rectangular shape, the linearity may be further improved with respect to an irregular shape such as a current rhombus or a triangle.
It can be understood by those skilled in the art that, for the sensing unit 2, as long as the length of the sensing body 20 satisfies the requirements of the touch detecting component, and the electrodes at both ends are respectively connected to different pins of the control wafer 200 to be able to charge and discharge the sensing unit. That is, it can be seen that the present invention does not limit the specific structure of the sensing unit. The sensing unit can have a variety of configurations, and those skilled in the art can make variations or improvements to the sensing unit based on the above-described ideas of the present invention, but such structures are included in the scope of the present invention without departing from the above-described ideas of the present invention.
Figure 44 is a schematic diagram of the touch detection element 100 in the touch detection element 100 when the substantially U-shaped sensing unit is touched. As can be seen from FIG. 44, the first electrode is 21, the second electrode is 22, the touch position A is close to the second electrode 22, and the length of the sensing unit 2 is 10 unit lengths, and the sensing unit 2 is evenly divided into 10 The length of the third body portion 203 of the sensing unit 2 is 4 unit lengths, and the lengths of the first body portion 201 and the second body portion 202 are 3 unit lengths. After detecting, it is known that the ratio of the first resistance to the second resistance is 4:1, that is, the length of the first electrode 21 to the touch position (reflected by the first resistor R1) is 80% of the length of all the sensing units. In other words, the touch point is located at a position of 8 unit lengths from the first electrode 21, and it is known that the touch point is located 2 units long from the second electrode 22. When the finger moves, the touch position moves accordingly, so the change of the touch position can determine the corresponding movement trajectory of the finger, thereby judging the user's input instruction.
As can be seen from the above example of Fig. 44, the calculation method of the touch detecting element according to the embodiment of the present invention is very simple, and thus the reaction speed detected by the touch detecting element 100 can be greatly improved.
45 is a schematic diagram of the touch detection element 100 in the touch detection element 100 according to the embodiment of the present invention when the L-shaped sensing unit is touched. As can be seen from FIG. 45, the first electrode is 21, the second electrode is 22, the touch position A is close to the second electrode 22, and the length of the sensing body 20 is 10 unit lengths, and the sensing body is evenly divided into 10 parts. The length of the first body portion 201 is 5 unit lengths, and the length of the second body portion 202 is 5 unit lengths. After detecting, it is learned that the ratio of the first resistor R1 and the second resistor R2 is 9:1, that is, the length of the first electrode 21 to the touch position (reflected by the first resistor R1) is 90% of the length of all the sensing units. In other words, the touch point is located at a position of 9 unit length from the first electrode 21, and it is known that the touch point is located at a position of 1 unit length from the second electrode 22.
As can be seen from Fig. 45, the calculation method of the touch detecting element according to the embodiment of the present invention is very simple, and therefore the reaction speed detected by the touch detecting element can be greatly improved.
In summary, the touch device according to the embodiment of the present invention applies a level signal to the electrodes 21 and 22 at both ends of the sensing unit 2. If the sensing unit 2 is touched, the sensing unit 2 forms a self-capacitance. Therefore, the self-capacitance can be charged by the applied level signal, and the touch position in the first direction is determined according to the proportional relationship between the first resistor R1 and the second resistor R2. For example, in an embodiment of the present invention, the proportional relationship between the first resistance and the second resistance is obtained by detecting from the first electrode and/or the second electrode when charging/discharging the self-capacitance. The proportional relationship between the first detected value and the second detected value is calculated. Therefore, the first detection value and the second detection value generated when the self-capacitance is charged/discharged are detected from the first electrode and/or the second electrode. In this way, the position of the touch point at the sensing unit can be reflected by the first detected value and the second detected value, thereby further determining the position of the touch point at the touch detecting element.
The portable electronic device according to an embodiment of the present invention may include the touch detection element 100 described with reference to the above embodiments. The portable electronic device according to the embodiment of the present invention may include the touch device described with reference to the above embodiments. Other configurations of portable electronic devices, such as frame structures and control components, and the like, and operations are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the scope of the claims and their equivalents.

100’, 200’. . . Diamond structure sensing unit

300’. . . Substrate

400’. . . Triangle sensing unit

500’, 21, 22. . . electrode

S1, S2. . . Contact area

R, R1, R2. . . resistance

100. . . Touch detection component

200. . . Control chip

201, 202, 203. . . Body part

1. . . Substrate

2. . . Sensing unit

20. . . Inductive body

24, 24a, 24b. . . Hollowing

25. . . Current path

300. . . finger

S401, S402, S403, S404. . . step

CTS. . . Capacitance detection module

C1. . . Self capacitance

L. . . length

h. . . width

A. . . Touch location

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from
Figure 1 is a structural diagram of a conventional self-capacitive touch detection component;
Figure 2a is a structural diagram of another conventional self-capacitive touch detection component;
Figure 2b is a schematic diagram of the detection of another conventional self-capacitive touch detection element shown in Figure 2a;
FIG. 3 is a schematic diagram of a detection principle of a touch device according to an embodiment of the present invention; FIG.
4 is a flow chart of a touch detection method of a touch device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a touch device according to an embodiment of the present invention, wherein the sensing body is rectangular;
6-17 are schematic views of different examples of touch detecting elements according to an embodiment of the present invention, wherein the sensing body is rectangular;
18-29 are schematic views of different examples of touch detecting elements according to another embodiment of the present invention, wherein the sensing body is substantially L-shaped;
30-41 are schematic views of different examples of touch detecting elements according to still another embodiment of the present invention, wherein the sensing body is substantially U-shaped;
Figure 42 is a schematic illustration of a touch sensing element in accordance with yet another embodiment of the present invention;
Figure 43 is a schematic illustration of a touch sensing element in accordance with another embodiment of the present invention;
Figure 44 is a diagram showing a sensing unit of a touch detecting element being touched according to an embodiment of the present invention, wherein the sensing body is substantially U-shaped; and Figure 45 is a sensing unit of the touch detecting element according to an embodiment of the present invention. A schematic diagram when touched, wherein the sensing body is generally L-shaped.

1. . . Substrate

2. . . Sensing unit

21, 22. . . electrode

24, 24a, 24b. . . Hollowing

25. . . Current path

Claims (15)

A touch detecting component, comprising:
a substrate; and a plurality of sensing units disposed on the substrate and not intersecting each other, each of the sensing units including an sensing body and a first electrode and a second electrode, the sensing body being rectangular The sensing body has a plurality of hollow portions arranged in a predetermined rule to define a current path portion for increasing resistance between the first and second electrodes on the sensing body And a cross-sectional area of the current path portion extending between the first and second ends of the sensing body and in a plane orthogonal to the extending direction thereof is smaller than a cross-sectional area of the sensing body on the plane. The touch detecting component according to claim 1, wherein the plurality of hollow portions are a first group and a second group linearly arranged along the extending direction, and the hollow portion in the first group One-to-one correspondence with the hollow portions in the second group, alternately arranged in the extending direction, and partially overlapping in a direction orthogonal to the extending direction. The touch detecting element according to claim 2, wherein each of the hollow portions is rectangular, I-shaped or H-shaped. The touch detecting component of claim 2, wherein each of the first set of hollow portions is an inverted T shape, and each of the second set of hollow portions is a T shape. The touch detecting element of claim 2, wherein each of the first set of hollow portions is L-shaped, and each of the second set of hollow portions is inverted L The first set of hollow portions and the second set of hollow portions constitute a plurality of pairs, and the L-shaped hollow portions and the inverted L-shaped hollow portions of each pair of hollow portions are opposed to each other and intersect in the extending direction. The touch detecting component according to claim 2, wherein the hollow portion in the first group is inverted V-shaped, and the hollow portion in the second group is V-shaped, the first group Each of the hollow portions in the hollow portion spans the adjacent two branches of the adjacent two hollow portions in the second group in the extending direction. The touch detecting component of claim 2, wherein each of the first set of hollow portions is an inverted F shape, and each of the second set of hollow portions is F And the first set of hollow portions and the second set of hollow portions constitute a plurality of pairs, and the F-shaped hollow portions and the inverted F-shaped hollow portions of each pair of hollow portions are opposite to each other and intersect in the extending direction. The touch detection element according to claim 1, wherein the hollow portion penetrates in a thickness direction of the induction body. The touch detecting element according to claim 1, wherein the hollow portions are evenly spaced apart. The touch detecting element according to claim 1, wherein the substrate is rectangular. A touch device, comprising:
a touch detecting element, which is a touch detecting element according to any one of claims 1 to 10; and a control wafer, the control wafer being connected to the first electrode and the second electrode, The control wafer is configured to apply a level signal to the first electrode and/or the second electrode to generate a current flowing between the first and second electrodes through the current path portion for passage The current is charged to the self-capacitance generated when the sensing body is touched, and is configured to calculate the first electrode of the at least one sensing unit when detecting that the sensing body of the at least one sensing unit is touched a proportional relationship between the first resistance between the self-capacitances and a second resistance between the second electrode of the at least one sensing unit and the self-capacitance, and for The proportional relationship between the second resistors determines a touched position at which the sensing body of the at least one sensing unit is touched. The touch device of claim 11, wherein a proportional relationship between the first resistor and the second resistor is based on the charging/discharging of the self-capacitor The proportional relationship between the first detected value and the second detected value obtained by the detection of one electrode and/or the second electrode is calculated. The touch device of claim 11, wherein the control chip comprises one or two capacitance detecting modules CTS. A portable electronic device, comprising the touch detecting element according to any one of claims 1-10. A portable electronic device, comprising the touch device according to any one of claims 11-13.