TWI453636B - Touch sensing method and electronic apparatus using the same - Google Patents

Description

Touch sensing method and electronic device using the same

The present invention relates to a sensing method and an electronic device using the same, and more particularly to a touch sensing method and an electronic device using the same.

In this age of information technology, the reliance on electronic products, including electronic products such as notebook computers, mobile phones, personal digital assistants (PDAs), digital music players, etc., is in line with our daily routine. Life has an inseparable relationship. Each of the foregoing electronic products has an input interface for the user to input commands into the electronic product, so that the internal system of the electronic product can spontaneously run the instructions issued by the user. At this stage, the most widely used input interfaces are keyboards and mice.

From a user's point of view, sometimes using traditional input interfaces (such as keyboards and mice) can be quite inconvenient. In order to solve the above problems, manufacturers have begun to install touch input interfaces (such as touch panels or touch panels) in electronic products to replace traditional keyboards and mice. At present, the user's instruction is usually issued through physical contact or an inductive relationship between the user's finger or the stylus and the touch input interface.

However, in some applications, unexpected problems can occur with touch devices. For example, in the case of a low ground state, the touch device may generate an unnecessary hollow effect. FIG. 1 is a schematic diagram showing the hollow effect of the related art. Referring to FIG. 1, the low ground state indicates that the touch device does not have a reference ground. That is to say, at this time, the touch device is placed on a car holder or a table and is not connected to a power core. When the touch panel 11 of the touch device is in a low ground state, the user gesture touches only a large area 20 corresponding to a single point on the touch panel 11, and the touch sensing controller (not shown) may The two error points P1 and P2 are reported. This phenomenon is called the hollow effect. The hollow effect causes a single touch contact to be separated into multiple touch contacts. Therefore, how to prevent the touch sensing controller from reporting the wrong point is an important issue today.

The invention provides a touch sensing method, which can prevent the touch controller from reporting a wrong point.

The present invention provides an electronic device that prevents a touch controller from reporting a false point.

The present invention provides a touch sensing method suitable for an electronic device including a touch panel. The touch sensing method includes the steps of: driving a touch panel in a mutual capacitance mode and a self capacitance mode; sensing a gesture applied to the touch panel, wherein the gesture is formed on the touch panel At least one touch area; determining at least one geometric center of the at least one touch area according to the self-mode data obtained from the self-inductance mode; and determining at least one geometric center according to the at least one touch area; At least one touch position associated with the gesture on the touch panel.

In an embodiment of the invention, the electronic device is not connected to the power line.

In an embodiment of the invention, at least one geometric center is located inside the at least one touch area.

In an embodiment of the invention, the gesture forms a plurality of touch regions on the touch panel. Each touch area has a geometric center.

In an embodiment of the invention, the step of determining at least one geometric center of the at least one touch area comprises: based on the self-mode data obtained from the self-inductance mode or the mutual-mode data obtained from the mutual inductance mode, Determine the geometric center of the touch area.

In an embodiment of the invention, determining the at least one touch position associated with the gesture comprises the step of determining a touch position associated with the gesture on the touch panel according to the geometric center of the touch area.

In an embodiment of the invention, the touch areas are separated from one another.

The present invention provides an electronic device including a touch panel, a touch panel driving module, and a touch sensing controller. The touch panel senses a gesture applied thereto, and the gesture forms at least one touch area on the touch panel. The touch panel driving module is connected to the touch panel, and drives the touch panel by the mutual inductance mode and the self-inductance mode. The touch sensing controller is connected to the touch panel and the touch panel driving module. The touch sensing controller determines at least one geometric center of the at least one touch area according to the self-mode data obtained from the self-inductance mode, and determines the touch panel and the gesture according to at least one geometric center of the at least one touch area At least one touch location associated.

In an embodiment of the invention, the touch sensing controller determines the geometric center of the touch area according to the self-mode data obtained from the self-inductance mode or the mutual mode data obtained from the mutual inductance mode.

In an embodiment of the invention, the touch sensing controller determines the touch position associated with the gesture on the touch panel according to the geometric center of the touch area.

The above described features and advantages of the present invention will be more apparent from the following description.

2 is a block diagram of an electronic device according to an embodiment of the present invention. Referring to FIG. 2, the electronic device 100 of the embodiment has a multi-touch function for sensing a user's gesture. The electronic device 100 includes a touch panel 110 , a touch sensing controller 120 , and a touch panel driving module 130 . The touch panel 110 is configured to sense a user gesture applied thereto, and the touch sensing controller 120 is connected to the touch panel 110 and is used to control the electronic device 100 to perform the electronic device 100 to perform a gesture related to the user. Various features. The touch panel driving module 130 drives the touch panel 110 to sense a user's gesture. In order to prevent the touch sensing controller 120 from reporting the wrong touch position, a touch sensing method combining the self-inductance mode and the mutual sensing mode is used in the electronic device 100 to sense the user's gesture in the electronic device 100. .

3 is a timing diagram of each sensing time frame in accordance with an embodiment of the present invention. Referring to FIG. 2 and FIG. 3 , the touch panel driving module 130 of the embodiment drives the touch panel 110 to sense the user's gesture in the mutual sensing mode during the first period of each sensing time frame. And sensing the user's gesture in the self-inductance mode during the second period of each sensing time frame. The touch sensing controller 120 receives the self-modulation data obtained by the self-inductance mode and the mutual inductance mode, respectively. And the mutual mode data to determine the touch position associated with the user gesture. In this embodiment, the first period of the sensing time frame is greater than the second period.

Here, the electronic device 100 can be a portable product (such as a mobile phone, a video camera, a notebook computer, a game machine, a watch, a music player, an email transceiver, a map navigator, a digital photo frame, etc.) , audio and video products (such as video players, etc.), screens, TVs, billboards or projector panels.

4 is a schematic diagram of a touch panel of an electronic device operating in a low ground state according to an embodiment of the invention. FIG. 5 is a flow chart of a touch sensing method according to an embodiment of the invention. Referring to FIG. 2 to FIG. 5, the low ground state indicates that the touch device is placed on the vehicle mount or the table when the power cord is not connected, so there is no reference ground in this embodiment. In step S500, the touch panel driving module 130 drives the touch panel 110 by the mutual inductance mode in the first period of each sensing frame or the self-inductance mode in the second period. Therefore, in step S502, the touch panel 110 senses the gesture applied thereto, so that the touch sensing controller 120 receives the self-modulation data and the mutual mode data obtained from the self-inductance mode and the mutual inductance mode, respectively. In this embodiment, the gesture forms a large area of the touch area 200 on the touch panel 110. If the touch sensing controller 120 determines the touch position related to the gesture based only on the mutual mode data, a hollow effect may occur, thereby causing the touch sensing controller 120 to incorrectly report the two points P1 and P2, and Think of these two points as the touch locations associated with the gesture. In order to avoid the occurrence of a hollow effect, the touch sensing controller 120 determines the touch position associated with the gesture based on at least one of the self-modulation data.

In step S504, the touch sensing controller 120 is based on the self-inductance mode. The self-modulation data obtained by the formula determines the geometric center C of the touch region 200. For example, the X coordinate of the geometric center C is determined according to the sensing waveform of the X-axis self-modulation data, and substantially corresponds to the sensing waveform peak of the X-axis; similarly, the Y coordinate of the geometric center C substantially corresponds to The peak value of the sensed waveform on the Y-axis. Therefore, the coordinate point of the geometric center C can be determined by this. It should be noted that the coordinates of the geometric center C correspond to the peaks of the sensing waveforms for illustrative purposes only, and the invention is not limited thereto.

Next, in step S506, the touch sensing controller 120 determines the touch position related to the gesture on the touch panel 110 according to the geometric center C of the touch area 200. For a single touch area, the geometric center C is located inside the single touch area 200. The touch sensing controller 120 returns a single point P, and replaces the points P1 and P2 with the point P as the touch position. Therefore, it is possible to accurately judge the touch position and avoid the occurrence of a hollow effect.

In the embodiment, the electronic device 100 is in a low ground state, and a touch point is touched on the touch panel 110. However, the touch sensing method of the present invention can also be applied to a case where a plurality of points are touched on the touch panel 110.

6 is a schematic diagram of a touch panel of an electronic device operating in a low ground state according to another embodiment of the present invention. FIG. 7 is a flow chart of a touch sensing method according to another embodiment of the present invention. Referring to FIG. 2, FIG. 6, and FIG. 7, the electronic device 100 still operates in a low ground state, and multiple points are touched on the touch panel 110. In the present embodiment, two touch regions 200a and 200b separated from each other are illustrated.

In step S700, the touch panel driving module 130 uses each sense The touch panel 110 is driven by the mutual inductance mode in the first period of the time frame or the self-inductance mode in the second period. Therefore, in step S702, the touch panel 110 senses the gesture applied thereto, so that the touch sensing controller 120 receives the self-modulation data and the mutual mode data obtained from the self-inductance mode and the mutual inductance mode, respectively.

In this embodiment, the touch regions 200a and 200b have geometric centers C1 and C2, respectively. The common geometric center C' of the touch areas 200a and 200b is determined according to the geometric centers C1 and C2 and is located on the line between the geometric centers C1 and C2. In step S704, the touch sensing controller 120 determines the geometric centers C1 and C2 based on the self-modulated data obtained from the self-inductive mode. That is to say, according to the sensing waveform of the self-modulation data, the X coordinate and the Y coordinate of the geometric center C1 can be determined, and the X coordinate and the Y coordinate substantially correspond to the left peak of the X-axis sensing waveform and the Y-axis. The upper peak of the sensed waveform is shown in Figure 6. Similarly, the X coordinate and the Y coordinate of the geometric center C2 substantially correspond to the right peak of the sensed waveform of the X axis and the lower peak of the sensed waveform of the Y axis.

Next, in step S706, the touch sensing controller 120 determines the touch position related to the gesture on the touch panel according to the geometric centers C1 and C2 of the touch areas 200a and 200b. The touch sensing controller 120 reports the two correct points P1' and P2' as the touch positions. It should be noted that the touch areas 200a and 200b in FIG. 6 are both small enough that the hollow effect does not occur. In other words, the geometric centers C1 and C2 can also be determined by the touch sensing controller 120 according to the mutual mode data obtained from the mutual inductance mode in step S704.

In addition, in this embodiment, the touch areas 200a and 200b are common. The geometric center C' does not fall on the peak of any of the sensed waveforms, and the coordinates of the common geometric center C' are not recognized as the touched position.

In summary, in the exemplary embodiment of the present invention, the touch sensing method combines the self-inductance mode and the mutual inductance mode in each sensing time frame. In the low ground state, the touch sensing controller determines the touch position associated with the user gesture according to at least one of the self-mode data obtained from the self-inductance mode to avoid returning the wrong touch position due to the hollow effect.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

11, 110‧‧‧ touch panel

20,200‧‧‧ touch area

100‧‧‧Electronic devices

120‧‧‧Touch Sensing Controller

130‧‧‧Touch panel driver module

C, C1, C2, C’‧‧‧ Geometric Center

P, P1, P2, P1', P2'‧‧ points

Steps of S500, S502, S504, S506‧‧‧ Touch Sensing Methods

Steps of S700, S702, S704, S706‧‧‧ Touch Sensing Methods

FIG. 1 is a schematic view showing a hollow effect in the related art.

2 is a block diagram of an electronic device according to an embodiment of the present invention.

3 is a timing diagram of each sensing time frame in accordance with an embodiment of the present invention.

4 is a schematic diagram of a touch panel of an electronic device operating in a low ground state according to an embodiment of the invention.

FIG. 5 is a flow chart of a touch sensing method according to an embodiment of the invention.

6 is a schematic diagram of a touch panel of an electronic device operating in a low ground state according to another embodiment of the present invention.

FIG. 7 is a flow chart of a touch sensing method according to another embodiment of the present invention.

Steps of S700, S702, S704, S706‧‧‧ Touch Sensing Methods

Claims (14)

A touch sensing method is applicable to an electronic device including a touch panel. The touch sensing method includes: driving the touch panel in a mutual inductance mode and a self-inductance mode; and sensing is applied to the touch panel. a gesture on the panel, wherein the gesture forms at least one touch area on the touch panel; if the at least one touch area is greater than a threshold area, determining according to one of the self-mode data obtained from the self-inductance mode At least one geometric center of the at least one touch area, wherein a hollow effect occurs if the at least one touch area is larger than the threshold area; and determining the touch according to the at least one geometric center of the at least one touch area At least one touch position on the control panel associated with the gesture, wherein the self-module data is not generated by a mutual mode material from the mutual inductance mode. The touch sensing method of claim 1, wherein the electronic device is not connected to a power line. The touch sensing method of claim 1, wherein the at least one geometric center is located inside the at least one touch area. The touch sensing method of claim 1, wherein the gesture forms a plurality of touch areas on the touch panel, each touch area having a geometric center. The touch sensing method of claim 4, wherein the step of determining the at least one geometric center of the at least one touch area comprises: if each touch area is not greater than the threshold area, according to the The self-mode data obtained from the self-inductance mode or the mutual model obtained from the mutual inductance mode And determining the geometric centers of the touch regions. The touch sensing method of claim 5, wherein the determining the at least one touch position associated with the gesture comprises: determining the touch based on the geometric centers of the touch regions The touch area associated with the gesture on the panel. The touch sensing method of claim 4, wherein the touch regions are separated from each other. An electronic device includes: a touch panel that senses a gesture applied thereto, wherein the gesture forms at least one touch area on the touch panel; and a touch panel driving module is coupled to the touch The touch panel is driven by a mutual sensing mode and a self-inductive mode; and a touch sensing controller is connected to the touch panel and the touch panel driving module, if the at least one touch The area is greater than a threshold area, and at least one geometric center of the at least one touch area is determined according to one of the self-mode data obtained from the self-inductance mode, wherein a hollow effect occurs if the at least one touch area is larger than the threshold area And determining, according to the at least one geometric center from the at least one touch area, at least one touch position associated with the gesture on the touch panel, wherein the self-mode data is not a mutual mode from the mutual inductance mode Data generated. The electronic device of claim 8, wherein the electronic device is not connected to a power line. The electronic device of claim 8, wherein the at least one geometric center is located inside the at least one touch area. The electronic device of claim 8, wherein the gesture forms a plurality of touch regions on the touch panel, each touch region having a geometric center. The application of the electronic apparatus of item 11 patentable scope, wherein the touch area if each region is not greater than the threshold, the touch sensing control in accordance with information obtained from the mold of the self-mode or from the self-inductance The mutual mode data obtained by the mutual inductance mode determines the geometric centers of the touch regions. The electronic device of claim 12, wherein the touch sensing controller determines the touch locations associated with the gesture on the touch panel according to the geometric centers of the touch regions . The electronic device of claim 11, wherein the touch regions are separated from each other.