TW201638763A - Electronic device and detection method of touch control - Google Patents

Abstract

An electronic device, including a touch panel and a control unit coupled to the touch panel, is provided. The control unit detects whether a first touch signal is received through the touch panel, wherein an energy value of the first touch signal is between a first threshold and a second threshold, the first threshold is bigger than the second threshold, and the first threshold corresponds to the energy value when detecting a tip touches the touch panel. When determining that the first touch signal is received from the touch panel, the control unit records positioning information corresponding to a position of the first touch signal on the touch panel, and defines a tip detecting area according to the positioning information of the first touch signal. The control unit predicts a position of a second touch signal that its energy value is bigger than the first threshold in the tip detecting area on the touch panel according to the position information of the first touch signal so as to generate predicting position information.

Description

Electronic device and touch detection method

The present invention relates to an electronic device, and more particularly to an electronic device and a touch detection method.

With the increasing use of mobile electronic devices with touch screens/touch panels, users are becoming accustomed to specific application scenarios, such as applications that correspond to notepad functions or graphics functions. A stylus is used to interact with the mobile electronic device. However, in some cases of use, the user often encounters a situation where the operating position is expected to fall, and it is not even possible to successfully write a continuous handwriting, draw a line segment, or even a track jump. In response to such a situation, it is often caused by insufficient accuracy of the touch panel/touch screen to detect the tip of the stylus.

The invention provides an electronic device and a touch detection method thereof, so as to use When using the stylus to interact with the touch panel of the electronic device, a better user experience can be obtained.

The electronic device of the present invention comprises a touch panel and a control unit coupled to the touch panel. The control unit detects whether the first touch signal is received from the touch panel, wherein the energy value of the first touch signal is between the first threshold and the second threshold, wherein the first threshold is greater than the second threshold. And the first threshold corresponds to the energy value detected when the tip touches the touch panel. When the control unit determines to receive the first touch signal from the touch panel, the position information corresponding to the position of the first touch signal on the touch panel is recorded, and the pen point detection area is defined according to the position information of the first touch signal. The control unit predicts the position of the second touch signal whose energy value is greater than or equal to the first threshold value in the pen tip detection area on the touch panel according to the position information of the first touch signal to generate the predicted position information.

A touch detection method suitable for an electronic device having a touch panel includes the following steps. First, detecting whether a first touch signal is received from the touch panel, wherein an energy value of the first touch signal is between a first threshold and a second threshold, wherein the first threshold is greater than the first threshold The second threshold, and the first threshold, correspond to the amount of energy detected when the tip touches the touch panel. Then, when it is determined that the first touch signal is received, a first position information corresponding to the position of the first touch signal is recorded, and a tip detection area is defined according to the first position information of the first touch signal. And generating, according to the first location information, a location of the second touch signal in the pen tip detection area of the touch panel to generate a predicted position information, wherein the energy value of the second touch signal is greater than or equal to the first threshold.

Based on the above, the present invention provides an electronic device and a touch detection method thereof, which can improve the accuracy of the touch panel when detecting interaction with the stylus.

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

10‧‧‧Electronic devices

110‧‧‧Touch panel

120‧‧‧Control unit

121‧‧‧Touch Detection Module

122‧‧‧Analysis sampling module

123‧‧‧ data module

130‧‧‧Processor

EV‧‧‧ energy changes

TS1, TS4‧‧‧ touch signals

P1‧‧‧ position

PP‧‧‧Predicted location information

PI1, PI2‧‧‧Location Information

TD‧‧‧pen detection area

PD‧‧‧ palm detection area

S201~S203, S501~S507‧‧‧ steps

FIG. 1 is a functional block diagram of an electronic device according to an embodiment of the invention.

FIG. 2 is a flow chart of a method for detecting a touch detection according to an embodiment of the invention.

FIG. 3 is a functional block diagram of a control unit in an electronic device according to an embodiment of the invention.

FIG. 4 is a schematic diagram showing the relationship between a pen point detection area, a palm detection area, and a fourth touch signal according to an embodiment of the invention.

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

FIG. 1 is a functional block diagram of an electronic device according to an embodiment of the invention. Referring to FIG. 1 , the electronic device 10 includes a touch panel 110 and a control unit 120 coupled to the touch panel 110 . The control unit 120 can detect whether the first touch signal TS1 is received from the touch panel 110, corresponding to the driver or the controller of the touch panel 110. The energy value of the first touch signal TS1 is between the first threshold and the second threshold, wherein the first threshold is greater than the second threshold, and the first threshold corresponds to when the pointer touches the touch panel 110 The amount of energy detected. When the control unit 120 determines that the first touch signal TS1 is received from the touch panel 110, the first position information PI1 corresponding to the position of the first touch signal TS1 on the touch panel 110 is recorded, and according to the first touch signal TS1. The first location information defines a sharp detection area. The control unit 120 predicts the position information of the second touch signal whose energy value is greater than or equal to the first threshold value in the pen tip detection area on the touch panel 110 according to the first position information of the first touch signal TS1. PP.

In the embodiment, the electronic device 10 further includes a processor 130 for running the operating system, and the processor 130 is coupled to the control unit 120. After the predicted location information PP is generated, the control unit 120 transmits the predicted location information PP (or simultaneously transmits the first location information PI1 and the predicted location information PP) to the processor 130. When the control unit 120 receives the second touch signal from the touch panel 110, the second touch information corresponding to the position of the touch panel is transmitted to the processor 130. The operating system running on the processor 130 and the application operating in the operating system can display the corresponding content corresponding to the second position information PI2 of the second touch signal, for example, a track corresponding to the stroke.

2 is a flow chart of a method for detecting a touch detection method according to an embodiment of the invention. The touch detection method is applicable to an electronic device having a touch panel, such as the electronic device 10 shown in FIG. . Referring to FIG. 2, firstly, in step S201, detecting whether the first touch signal is received from the touch panel, wherein the first touch signal The energy value is between the first threshold and the second threshold, wherein the first threshold is greater than the second threshold, and the first threshold corresponds to the energy value detected when the tip touches the touch panel. Then, in step S202, when it is determined that the first touch signal is received, a first position information corresponding to the position of the first touch signal is recorded, and the pen point detection area is defined according to the first position information of the first touch signal. . And in step S203, the predicted position information is generated according to the first position information predicting the position of the second touch signal in the pen tip detection area on the touch panel, wherein the energy value of the second touch signal is greater than or equal to the first valve. value.

When an object approaches the touch panel 110, the control unit 120 can detect a change in energy at a specific position on the touch panel 110 through the touch panel 110. In the embodiment, the first threshold corresponds to the energy value detected by the touch panel 110 when the pen tip contacts the touch panel 110, and the second threshold corresponds to no object contacting the touch panel 110. The energy value detected by the touch panel 110. The energy value of the first touch signal TS1 is between the first threshold and the second threshold, that is, the first touch signal TS1 corresponds to the tip of the first touch panel 110. The energy value of the second touch signal is greater than or equal to the first threshold, that is, the second touch signal corresponds to the tip of the touch panel 110 actually touching, or even the other touch panel 110 is larger, or A more conductive object. However, in the present invention, it is mainly based on the judgment of the nib.

Briefly, in the present invention, the control unit 120 will detect the position of the pen tip to be touched (ie, the tip of the stylus) on the touch panel 110, and thereby predict the nib of the next stylus. What is the corresponding position? Due to the use of touch The application corresponding to the pen tip of the pen includes text writing, drawing, and the like. Therefore, in the present invention, the position of the pen tip of the stylus and the touch signal of the next second are expected (ie, the user utilizes continuous The touch gesture composed of the touch signals should be not far from the predicted position in the predicted position information PP. Therefore, in the embodiment, the control unit 120 defines a sharp detection area on the touch panel 110 according to the predicted position in the predicted position information P, and enhances the pair in the pen point detection area by a scanning method. The ability to detect the touch signal of the nib. The scanning method includes scanning the nib detection area in a higher speed and in a fine manner such that the touch signal received in the nib detection area (for example, the energy value is greater than or equal to the second threshold) The two touch signals can be transmitted back to the processor 130 (and the operating system operated by the processor 130) more quickly and accurately.

On the other hand, the nib detection area can correspond to the first position information PI1. The circular area defined by setting the radius is a rectangular area defined by the side length of the coordinate position corresponding to the first position information PI1. Alternatively, the pen point detection area may also be defined by the touch panel 110 receiver/transmitter to which the coordinate corresponding to the first position information PI1 belongs. For example, the coordinates corresponding to the first position information PI1 correspond to a receiver of the touch panel 110, and the above-mentioned nib monitoring area may be a receiver adjacent to the receiver in the longitudinal direction and the lateral direction, for example, longitudinally Adjacent 10 receivers and horizontal and adjacent 10 receivers, etc., but the invention is not limited thereto.

3 is a control unit in an electronic device according to an embodiment of the invention. Functional block diagram. Referring to FIG. 3, the control unit 120 includes a touch detection module. 121. Analyze the sampling module 122 and the data module 123. The touch detection module 121 is coupled to the touch panel 110 to detect whether each position on the touch panel 110 has an energy change EV. The analysis sampling module 122 is coupled to the contact detection unit 111. When the touch panel 110 has an energy change EV, and the energy value of the energy change EV is between the first threshold and the second threshold, the sampling mode is analyzed. The group 122 determines that the energy change EV is the first touch signal TS1, and records the position corresponding to the first touch signal TS1 on the touch panel 110, and generates the first position information PI1 according to the position. The data module 123 is coupled to the analysis sampling module 122, and the first position information PI1 corresponding to the position of the first touch signal TS1 on the touch panel 110 is obtained from the analysis sampling module 122, and is generated according to the first position information PI1. Forecast location information PP. The analysis sampling module 122 selectively transmits the first location information PI1 and/or the predicted location information PP to the processor 130 of the operational operating system according to requirements.

When the analysis sampling module 122 determines that the energy value of the energy change EV is greater than or equal to the first threshold, the analysis sampling module 122 determines that the energy change is the second touch signal, and generates according to the second touch signal. The second location information PI2. When the data module 123 receives the second location information PI2, the second location information PI2 is directly transmitted to the processor 130. In the embodiment, the touch detection module 121, the analysis sampling module 122, and the data module 123 can be implemented by software or by a physical circuit, which is not limited in the present invention.

In this embodiment, the control unit 120 continuously passes through the touch panel 110 to determine whether the first touch signal TS1 whose energy value is between the first threshold and the second threshold is received. When the control unit 120 determines to receive the first through the touch panel again, When the touch signal TS1 (or may be referred to as a third touch signal), the control unit 120 adjusts the pen point detection area according to the first touch signal TS1 received by the UI. That is, the center of the pen tip detection area is adjusted to the position corresponding to the received first touch signal TS1. That is to say, each time the control unit 120 detects that the tip of the stylus pen approaches the touch panel 110 again, the control unit 120 adjusts the position of the pen point detection area.

In addition, in an embodiment of the invention, after defining the pen point detection area, the control unit 120 further defines a palm detection area that is larger than the pen point detection area. 4 is a schematic diagram showing the relationship between a pen point detection area, a palm detection area, and a fourth touch signal according to an embodiment of the invention. In FIG. 4, the pen point detection area and the palm detection area are depicted as a circle. Shape, but the invention is not limited thereto.

The center of the palm detection area TD (ie, the position P1 in FIG. 4) is the same as the nib detection area PD, and the size of the palm detection area PD is larger than the size of the nib detection area TD. In other words, the control unit 120 detects the palm touch detection on the touch panel 110 in addition to continuously detecting whether the first touch signal TS1 or the second touch signal is received in the nib detection area TD. Whether the touch signal corresponding to the palm touch touch panel 110 (which may be referred to as a fourth touch signal) is included in the PD domain. The energy value of the fourth touch signal is greater than the third threshold, and the contact area of the fourth touch signal corresponding to the touch panel is greater than a preset area value (eg, greater than 3 on the touch panel 110). The size of the coverage of the receiver/transmitter, and the fourth touch signal corresponds to the palm of the body, and the third threshold will be greater than the first threshold and the second threshold.

When the control unit 120 detects that the palm touch detection area PD on the touch panel 110 includes the fourth touch signal corresponding to the palm touch touch panel 110 (ie, the fourth touch signal TS4 shown in FIG. 4), The control unit 120 can adjust the tip detection according to the position information of the fourth touch signal TS4 and the corresponding position information when the user places the hand on the touch panel and uses the stylus pen to write or draw the usage context. The position of the area TD, whereby the user's writing direction can be predicted more effectively. When the control unit 120 receives the first touch signal TS1 (or the third touch signal) and the fourth touch signal, the control unit 120 can simultaneously select the first touch signal TS1 (or the third touch signal). And the position information corresponding to the fourth touch signal TS4 to adjust the position of the pen point detection area TD (and the palm detection area PD moving with the pen point detection area) on the touch panel 110. Therefore, in this embodiment, the center of the nib detection area TD is not necessarily limited to the position information corresponding to the first touch signal TS1 (or the third touch signal).

FIG. 5 is a flow chart showing the steps of a touch detection method according to an embodiment of the invention. Compared with the embodiment shown in FIG. 2, the touch detection method in the embodiment of FIG. 5 provides a more detailed operation. Referring to FIG. 1 and FIG. 5 simultaneously, first, the control unit 120 continuously determines whether the first touch signal whose energy value is between the first threshold and the second threshold is received through the touch panel 110 (step S501). When the control unit 120 determines that the first touch signal TS1 is received through the touch panel 110, the control unit 120 defines the pen point detection area according to the first touch signal TS1 and the first position information PI1 corresponding to the first touch signal. (Step S502). Moreover, the control unit 120 further generates predicted position information according to the first position information PI1 and the pen point detection area. PP detects the nib detection area in a scan mode (step S503). It should be noted that the location of the predicted location information corresponding to the touch panel 110 will be located within the nib detection area.

Next, the control unit 120 will continuously receive the second touch signal whose energy value is greater than the second threshold value in the pen point detection area (step S504). When the control unit 120 determines that the second touch signal is received in the pen tip detection area, the control unit 120 transmits the position information corresponding to the second touch signal (ie, the second position information PI2) to the operation system. The device 130 (step S505), and continues to determine whether to continue receiving the next second touch signal.

If the control unit 120 determines that the second touch signal is not received in the pen tip detection area (NO in step S504), the control unit 120 further determines whether the third touch signal is received in the pen tip detection area and/or Or receiving the fourth touch signal in the palm detection area (step S506). When the control unit 120 determines that the third touch signal is received in the pen point detection area and/or receives the fourth touch signal in the palm detection area, the control unit 120 is configured according to the third touch signal and/or the fourth touch. The signal adjusts the position of the nib detection area (and the palm detection area) on the touch panel 110.

In summary, the present invention provides an electronic device and a touch detection method thereof, which can intelligently determine a user's handwriting area using a stylus, and can determine a user's next pen down area according to the position of the pen tip and the palm. . In addition, in the present invention, the control unit continuously scans the pen tip detection area instead of the entire touch panel, thereby reducing the scanning time, making the touch panel and the control unit faster and more accurate. Return the information corresponding to the touch signal to the transport As the processor of the operating system.

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

10‧‧‧Electronic devices

110‧‧‧Touch panel

120‧‧‧Control unit

130‧‧‧Processor

TS1‧‧‧ touch signal

PP‧‧‧Predicted location information

PI1, PI2‧‧‧Location Information

Claims (8)

An electronic device includes: a touch panel; a control unit coupled to the touch panel; and wherein the control unit detects whether a first touch signal is received from the touch panel, wherein the first touch An energy value of the signal is between a first threshold and a second threshold, wherein the first threshold is greater than the second threshold, and the first threshold corresponds to when the tip touches the touch panel Detecting the energy value; when the control unit determines to receive the first touch signal from the touch panel, recording a first position information corresponding to the position of the first touch signal on the touch panel, And determining, according to the first position information of the first touch signal, a tip detection area; and the control unit predicting the tip detection on the touch panel according to the first position information of the first touch signal The location of the second touch signal is received in the area to generate a predicted position information, wherein the energy value of the second touch signal is greater than or equal to the first threshold. The electronic device of claim 1, wherein the electronic device further comprises: a processor coupled to the control unit for operating an operating system, wherein the control unit transmits the predicted location information to the And receiving, when the control unit receives the second touch signal from the touch panel, transmitting the second touch signal to the second position information corresponding to the position of the touch panel to the location Processor. The electronic device of claim 1, wherein the control unit further detects whether the device is received through the touch panel after the tip detection area is defined according to the first position information of the first touch signal. a third touch signal having an energy value between the first threshold and the second threshold; and when the control unit detects receiving the third touch signal, adjusting the position according to the third touch signal The position of the nib detection area. The electronic device of claim 3, wherein the control unit defines a palm detection area on the touch panel, wherein a center of the palm detection area overlaps a center of the nib detection area, and the The size of the detection area of the palm is greater than the detection area of the nib; the control unit detects whether a fourth touch signal is received in the palm detection area, wherein the energy value of the fourth touch signal is greater than a third valve. And the fourth touch signal corresponds to a contact area on the touch panel that is greater than a predetermined area value, and the third threshold is greater than the first threshold and the second threshold; and when the When the control unit determines that the fourth touch signal is received by the touch panel, the position of the pen point detection area is adjusted according to the fourth touch signal and the third touch signal. The electronic device of claim 1, wherein the control unit comprises: a touch detection module coupled to the touch panel to detect whether the touch panel has an energy change; An analysis sampling module coupled to the touch detection unit, wherein when the touch panel has an energy change, and the energy value of the energy change is between the first threshold and the second threshold, determining The energy change is the first touch signal, and the record corresponds to the position of the first touch signal on the touch panel; and a data module is coupled to the analysis sampling module, and the analysis sampling module is Obtaining the first location information corresponding to the location of the first touch signal on the touch panel, and generating the predicted location information according to the first location information. A touch detection method is applicable to an electronic device having a touch panel, including: detecting whether a first touch signal is received from the touch panel, wherein an energy value of the first touch signal is between Between the first threshold and a second threshold, wherein the first threshold is greater than the second threshold, and the first threshold corresponds to the energy value detected when the tip touches the touch panel; When it is determined that the first touch signal is received, a first position information corresponding to the position of the first touch signal is recorded, and a first edge detection area is defined according to the first position information of the first touch signal; And generating, according to the first location information, a location of the second touch signal in the nib detection area of the touch panel to generate a predicted position information, wherein the energy value of the second touch signal is greater than or equal to the The first threshold. The touch detection method of claim 6, wherein the touch detection method further comprises: after the step of defining the nib detection area according to the position of the first touch signal, the touch detection method further comprises: Detecting whether a third touch signal whose energy value is between the first threshold and the second threshold is received; and when detecting the third touch signal, according to the location of the third touch signal Adjust the position of the tip detection area. The touch detection method of the seventh aspect of the invention, wherein the step of detecting the nib detection area according to the position of the first touch signal further comprises: The touch panel defines a palm detection area, wherein the center of the palm detection area is the same as the nib detection area, and the size of the palm detection area is larger than the nib detection area; detecting in the palm detection area Receiving a fourth touch signal, wherein the energy value of the fourth touch signal is greater than a third threshold, and the contact area of the fourth touch signal corresponding to the touch panel is greater than a preset An area value, wherein the third threshold is greater than the first threshold and the second threshold; and when determining to receive the fourth touch signal, adjusting the nib according to the fourth touch signal and the third touch signal The location of the detection area.