TWI463365B - 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 began 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.

For smart phones, the capacitive touch input interface usually has high sensitivity, and battery charging is an important issue. Generally use a Universal Serial Bus (USB) interface The transformer is used to charge the battery. However, the charging voltage output from the AC power supply can easily bring AC noise into the touch sensing controller of the smart phone, which leads to a false return. 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: obtaining a mutual-mode data by sensing a gesture applied to the touch panel in a mutual capacitance mode during a first period of the sensing time frame. During the second period of the sensing time frame, the self-mode data is obtained by sensing the gesture applied to the touch panel in the self capacitance mode; and according to the self-modulation data or The mutual mode data determines the touch position associated with the gesture on the touch panel.

In an embodiment of the invention, the touch sensing method further includes the step of determining whether the electronic device is connected to the AC power supply. If the electronic device is not connected to the AC power supply, the touch position related to the gesture on the touch panel is determined according to the mutual mode data.

In an embodiment of the present invention, if the electronic device is connected to the AC power supply, the touch sensing method further includes the following steps: determining the self-mode data and Whether the mutual model data is the same. If the self-mode data is the same as the mutual-mode data, the touch position related to the gesture on the touch panel is determined according to the mutual-mode data.

In an embodiment of the present invention, if the self-mode data and the mutual-mode data are different, the touch position associated with the gesture on the touch panel is determined according to the self-mode data.

The invention provides an electronic device comprising a touch panel and a touch sensing controller. The touch panel includes a plurality of sensing blocks, and senses a gesture applied thereto according to a change in the sensing block capacitance value. The touch panel senses a gesture applied to the touch panel in the mutual inductance mode during the first period of sensing the frame; and senses the touch applied in the self-inductance mode during the second period of sensing the frame Control panel gestures. The touch sensing controller is connected to the touch panel, and determines a touch position related to the gesture on the touch panel according to the self-mode data or the mutual-mode data.

In an embodiment of the present invention, the touch sensing controller further determines whether the electronic device is connected to the AC power supply, and if the electronic device is not connected to the AC power supply, the touch sensing controller is configured according to the mutual mode data. Determine the touch position associated with the gesture on the touch panel.

In an embodiment of the present invention, if the electronic device is connected to the AC power supply, the touch sensing controller determines whether the self-mode data and the mutual-mode data are the same, and if the self-mode data and the mutual-mode data are the same, The control sensor controller determines the touch position related to the gesture on the touch panel according to the mutual mode data.

In an embodiment of the present invention, if the self-mode data and the mutual-mode data are different, the touch-sensing controller determines the touch panel according to the self-mode data. Gesture-related touch locations.

In an embodiment of the invention, the first period of the sensing time frame is greater than the second period.

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

1A is a block diagram of an electronic device in accordance with an embodiment of the present invention. Referring to FIG. 1A, 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 and a touch sensing controller 120. 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. 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. .

FIG. 1B is a timing diagram of each sensing time frame according to an embodiment of the present invention. Referring to FIG. 1A and FIG. 1B , the touch panel of the embodiment senses a user's gesture in the mutual inductance mode during the first period of each sensing time frame, and the second frame in each sensing time frame. During the period, the user's gesture is sensed in the self-inductance mode. In this embodiment, the first period of the sensing time frame is longer than the second period.

Here, the electronic device 100 can be a portable product (such as a mobile phone, photo Video recorders, notebook computers, game consoles, watches, music players, e-mail transceivers, map navigators, digital photo frames, etc.), audio and video products (such as video players, etc.), screens, TVs, billboards or Projector panel.

FIG. 2 is a schematic diagram showing the operation of the touch panel of the electronic device according to an embodiment of the present invention under normal conditions. Referring to FIG. 1 and FIG. 2 , in the embodiment, the touch panel 110 senses a gesture of the user in the mutual sensing mode during the first period of sensing the frame. The touch panel 110 of the present embodiment includes a plurality of sensing blocks 112 for sensing the gesture 200 applied thereto. The touch panel 110 senses the gesture 200 according to a change in the capacitance value of the sensing block 112 in the mutual inductance mode. The touch panel 110 is driven by the plurality of scan signals TX and outputs a plurality of sensing signals RX to the touch sensing controller 120. The touch sensing controller 120 determines the correct touch position P related to the gesture 200 on the touch panel 110 according to the mutual mode data, wherein the mutual mode data is obtained by sensing the touch panel 110 in the mutual inductance mode. As shown in FIG. 2, the block touched by the gesture 200 is a black block and an adjacent gray block. When the electronic device 100 is operating under normal conditions, the touch sensing controller 120 can correctly determine that the block touched by the gesture 200 corresponds to the correct touch position on the touch panel 110 according to the mutual mode data. Therefore, no erroneous touch position is judged in this embodiment.

FIG. 3 is a schematic diagram showing the operation of the touch panel of the electronic device in a charging state according to an embodiment of the invention. Referring to FIG. 1 and FIG. 3 , in the embodiment, the touch panel 110 still senses the gesture of the user in the mutual inductance mode. In the case of charging, the electronic device 100 is connected to the AC power supply 300 to charge the battery. However, the AC power supply 300 It is easy to bring AC noise into the touch sensing controller 120. That is to say, in the mutual inductance mode, in addition to the touched block, the sensing blocks of the other touch panel 110 are affected by the communication noise, so that the touch sensing controller 120 touches the block touched by the gesture 200. The corresponding plurality of sensing blocks generate an erroneous judgment. Therefore, due to the relationship of the communication noise, the touch position of the erroneous judgment surrounded by the broken line is generated.

FIG. 4 is a schematic diagram showing the operation of the touch panel of the electronic device in a charging state according to another embodiment of the present invention. Referring to FIG. 1 and FIG. 4 , in the embodiment, the touch panel 110 senses a gesture of the user in the self-inductance mode during the second period of the sensing time frame. Similarly, during this time, the AC noise is still easily entered into the touch sensing controller 120 via the AC power supply 300 while charging. However, according to the characteristics of the self-inductance mode and the illustration of FIG. 4 , even if the alternating noise enters the touch sensing controller 120 , the touch sensing controller 120 can send the scan signal to the touch panel 110 from the Y axis. In a row, the correct touch position corresponding to the block touched by the gesture 200 is correctly determined on the touch panel 110 through the self-mode data received on the X-axis. Therefore, in the present embodiment, no erroneous touch position judgment is generated.

FIG. 5 is a flow chart of a touch sensing method according to an embodiment of the invention. Referring to FIG. 1A and FIG. 5 , the touch sensing method of the embodiment combines a self-inductance mode and a mutual sensing mode to sense a user's gesture and prevent the touch sensing controller 120 from reporting an incorrect touch position. . In step S500, the touch panel 110 first senses the gesture 200 applied to the touch panel 110 in the mutual inductance mode during the first period of the sensing time frame. Next, in step S502 In the second period of the sensing time frame, the same gesture 200 is sensed in the self-inductance mode. It should be noted that the order in which the gestures are sensed using the self-inductance mode and the mutual inductance mode is merely illustrative, and the present invention is not limited thereto. In step S504, after receiving the self-modulation data and the mutual-mode data in the sensing time frame, the touch sensing controller 120 determines the touch related to the gesture 200 on the touch panel 110 according to the self-mode data or the mutual-mode data. Touch the position.

6 is a flow chart of a touch sensing method according to another embodiment of the present invention. Referring to FIG. 1A , FIG. 1B and FIG. 6 , in step S600 , the touch sensing controller 120 determines whether the electronic device 100 is connected to the AC power supply. If not connected, it means that the electronic device 100 works under normal conditions. Therefore, in step S602, the touch sensing controller 120 determines the touch position related to the gesture on the touch panel according to the mutual mode data, wherein the mutual mode The data was taken during the first period of the sensing time frame. Next, the method performs step S610, and the correct touch position associated with the gesture 200 is correctly reported.

If the electronic device 100 is connected to the AC power supply, it means that the electronic device 100 is working on charging. In this case, the touch sensing controller 110 compares the mode data with the self mode data in step S604, and then determines whether the self mode data and the mode data are the same in step S606.

If the self-modulation data is the same as the mutual-mode data, the method performs step S602, and the touch-sensing controller 120 still determines the touch position associated with the gesture 200 according to the mutual-mode data. Therefore, in step S610, the correct touch position associated with the gesture 200 is correctly reported.

Conversely, if the self-modulation data is not the same as the mutual-mode data, it means that the mutual-mode data is affected by the communication noise and some errors are generated. In this situation, The method performs step S608, and the touch sensing controller 120 determines the touch position related to the gesture 200 according to the self-mode data, wherein the self-mode data is acquired in the second period of the sensing time frame. Therefore, in step S610, the correct touch position associated with the gesture 200 is also correctly reported. That is, the touch sensing controller 120 determines the touch position according to the self-modulation data in the charging situation, and the false touch point (ghost point), as shown in FIG. 3, is surrounded by a dotted line. The location is therefore eliminated.

In summary, in an 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 different situations, the touch sensing controller determines the touch position related to the user's gesture based on the data obtained in different modes to prevent the wrong touch position from being reported.

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.

100‧‧‧Electronic devices

110‧‧‧Touch panel

112‧‧‧Sensing block

120‧‧‧Touch Sensing Controller

200‧‧‧ gestures

300‧‧‧AC power supply

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

Steps of S600, S602, S604, S606, S608, S610‧‧‧ touch sensing method

TX‧‧‧ scan signal

RX‧‧‧ sensing signal

1A is a block diagram of an electronic device in accordance with an embodiment of the present invention.

FIG. 1B is a timing diagram of each sensing time frame according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing the operation of the touch panel of the electronic device according to an embodiment of the present invention under normal conditions.

3 illustrates a touch panel worker of an electronic device according to an embodiment of the present invention A schematic diagram of the charging condition.

FIG. 4 is a schematic diagram showing the operation of the touch panel of the electronic device in a charging state according to another embodiment of the present invention.

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

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

Steps of S600, S602, S604, S606, S608, S610‧‧‧ touch sensing method

Claims (10)

A touch sensing method is applicable to an electronic device including a touch panel, the touch sensing method comprising: sensing in a mutual inductance mode during a first period of a sensing time frame Applying a gesture to the touch panel to obtain a mutual mode data; during a second period of the sensing time frame, obtaining a gesture applied to the touch panel in a self-inductance mode Self-modulating data; and determining, according to the self-modulating data or the mutual-mode data, a touch position associated with the gesture on the touch panel. The touch sensing method of claim 1, further comprising: determining whether the electronic device is connected to an AC power supply, wherein if the electronic device is not connected to the AC power supply, according to the mutual The mode data determines the touch position associated with the gesture on the touch panel. The touch sensing method of claim 2, wherein if the electronic device is connected to the AC power supply, the touch sensing method further comprises: determining whether the self-mode data and the mutual mode data are the same If the self-modulation data is the same as the mutual-mode data, determining the touch position associated with the gesture on the touch panel according to the mutual-mode data. The touch sensing method of claim 3, wherein if the self-mode data is different from the mutual-mode data, determining, according to the self-modulation data, the touch associated with the gesture on the touch panel Touch the position. The touch sensing method of claim 1, wherein the first period of the sensing time frame is greater than the second period. An electronic device includes: a touch panel including a plurality of sensing blocks, and sensing a gesture applied thereto according to the change in capacitance values of the sensing blocks, wherein the touch panel is in a sensing manner Sensing the gesture applied to the touch panel in a mutual inductance mode during a first period of the frame, and sensing in the self-inductance mode during a second period of the sensing time frame The touch panel is connected to the touch panel, and the touch panel is connected to the touch panel, and the touch position associated with the gesture on the touch panel is determined according to the self-mode data or the mutual-mode data. . The electronic device of claim 6, wherein the touch sensing controller further comprises determining whether the electronic device is connected to an AC power supply, and if the electronic device is not connected to the AC power supply, The touch sensing controller determines the touch position associated with the gesture on the touch panel according to the mutual mode data. The electronic device of claim 7, wherein if the electronic device is connected to the AC power supply, the touch sensing controller determines whether the self-mode data and the mutual mode data are the same, and if The self-modulation data is the same as the mutual-mode data, and the touch-sensing controller determines the touch position associated with the gesture on the touch panel according to the mutual-mode data. The electronic device of claim 8, wherein the touch sensing controller determines the gesture on the touch panel according to the self-mode data if the self-mode data is different from the mutual-mode data. The relevant touch position. The electronic device of claim 6, wherein the first period of the sensing time frame is greater than the second period.