TW202122985A - Electronic system and method thereof for setting erasing area - Google Patents

Abstract

The present invention provides a method for setting erasing area. The method comprises: receiving an attitude of an electronic eraser with regard to a touch screen and pressures; determining whether at least one corner of the electronic eraser touches the touch screen; and determining properties of an erasing area according to a combination of the attitude and the pressures if at least one corner of the electronic eraser does touch the touch screen

Description

Electronic system and method for wiping zone setting

The present invention relates to an electronic eraser, and particularly relates to an electronic eraser and system similar in use experience to traditional erasers.

The blackboard or whiteboard is a common tool in traditional teaching. The user can use the marker pen to write on the whiteboard, and use the eraser to wipe the marker pen's handwriting. Some manufacturers have produced electronic whiteboards that allow users to move on the electronic whiteboard with a stylus. The electronic whiteboard can sense the position of the stylus nib and display the handwriting on the electronic whiteboard to simulate the situation of the marker pen writing on the whiteboard. When the user wants to wipe a part of the area on the electronic whiteboard, he needs to change the setting of the stylus to change the marker mode to the eraser mode. However, compared with the traditional eraser, the area of the stylus pen tip is small, and it cannot wipe a large area of traces. This causes considerable difficulties for users when using the electronic whiteboard. Accordingly, there is a need for a device that can be simulated as a traditional eraser, so that users can easily wipe a large electronic whiteboard area.

When users use a traditional eraser to wipe the blackboard, they usually use one side or corner of the eraser to wipe smaller areas, so as to correct or modify the content in these areas without affecting the surrounding areas. When using an electronic eraser that can wipe a larger area, you also need to retain the same experience. Allow users to perform large-area Wipe, you can also use one side or corner of the electronic eraser to wipe. When using one side or a corner, the wiping effect can be changed according to the pressure applied by the electronic eraser.

The method and electronic system provided by the present invention can be used for the setting of the wiping area. In addition to wiping a large area in a fully bonded manner, the user can also wipe with one side or corner of the electronic eraser. When using one side or a corner, the wiping effect can be changed according to the pressure applied by the electronic eraser.

According to an embodiment of the present invention, there is provided a method for setting a wipe area, including: receiving a posture and contact pressure of an electronic eraser corresponding to a touch screen; determining whether at least one corner of the electronic eraser touches the touch screen; and When at least one corner of the wiping surface of the electronic eraser contacts the touch screen, the attribute of a wiping area is determined according to any combination of the posture and the contact pressure.

In one embodiment, in order to receive the posture and contact pressure more quickly, or to have a higher update rate of the posture of the electronic eraser, the posture and the contact pressure are received from a touch connected to the touch screen. Control processing device, the touch processing device receives the electrical signals emitted by the multiple eraser electrodes of the electronic eraser through the touch electrodes included in the touch screen, so as to respond to the electrical signal and the multiple eraser electrodes The position calculates the posture and the contact pressure.

In one embodiment, in order to support an electronic eraser that can transmit information from a non-touch screen, the wipe area setting method further includes: receiving the contact pressure from the electronic eraser; receiving a plurality of electronic erasers from the touch processing device The eraser electrode corresponds to a plurality of proximity events of the touch screen; and according to the plurality of proximity events, the contact pressure and the plurality of eraser electrodes The position and the contact pressure are calculated.

In one embodiment, in order for the user to experience the electronic eraser gesture to control the directivity of the wipe area, the step of determining the attributes of the wipe area further includes: when only one corner of the wipe surface is in contact with the touch screen At this time, the shape of the wiping area is a directional shape, and the directional shape and the direction of the shape correspond to the posture.

In one embodiment, in order for the user to experience the electronic eraser gesture, the directivity of the wiping area can be controlled, wherein the shape of the wiping area includes a pointing angle, and the angle of the pointing angle corresponds to the wiping surface and the touch screen When the angle between the wiping surface and the touch screen is larger, the angle of the pointing angle is smaller.

In one embodiment, in order to let the user experience the posture of the electronic eraser, the wipe area can be controlled, wherein the size of the wipe area corresponds to one of the following parameters or any combination thereof: the angle between the wipe surface and the touch screen; The contact pressure of the corner; and the average contact pressure of the side where the wiped surface is in contact with the touch screen. In one embodiment, in order for the user to use the contact pressure to control the wiping change rate, the wiping change rate inside the wiping area is consistent, and the wiping change rate corresponds to the contact pressure of the corner. The average contact pressure may be the average value of the contact pressures at the two corners that determine the side. In one embodiment, in order to simulate the wiping scenario of a traditional eraser, the wiping change rate inside the wiping area is inconsistent, and the change of the wiping change rate corresponds to the direction of the directional shape. In one embodiment, in order to reflect that the shape of the electronic eraser is asymmetrical corresponding to the contact angle, the directivity shape is asymmetrical, and the directivity shape corresponds to the two adjacent sides of the corner and the touch Two corners of the screen. In one embodiment, in order to allow the control of the electronic eraser to be applied to a curved touch screen, when the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen.

According to an embodiment of the present invention, there is provided an electronic system for wiping area setting, including: a touch processing device connected to a touch screen; and a host connected to the touch processing device for executing non- The program stored in the volatile memory implements the following steps: receiving the posture and contact pressure of an electronic eraser corresponding to the touch screen; determining whether the electronic eraser touches the touch screen at least one corner; and when the electronic eraser When at least one corner of the wiping surface touches the touch screen, the attribute of a wiping area is determined according to any combination of the posture and the contact pressure.

In one embodiment, in order to receive the posture and the contact pressure more quickly, or to have a higher update rate of the posture of the electronic eraser, the posture and the contact pressure are received from the touch processing device, and the touch The processing device receives the electrical signals emitted by the eraser electrodes of the electronic eraser through the touch electrodes included in the touch screen, and thereby calculates the attitude and the eraser electrodes based on the relative positions between the electrical signals and the eraser electrodes. Contact pressure.

In one embodiment, in order to support an electronic eraser that can transmit information from a non-touch screen, the electronic system further includes: a signal receiver connected to the electronic eraser for receiving the signal from a signal transmitter of the electronic eraser The contact pressure, where the host is connected to the signal receiver, is further used to execute the program stored in the non-volatile memory to implement the following steps: the erase electrodes of the electronic eraser received from the touch processing device correspond to the A plurality of proximity events of the touch screen; and the attitude and the contact pressure are calculated according to the plurality of proximity events, the relative position between the contact pressure and the plurality of eraser electrodes.

In one embodiment, in order for the user to experience the electronic eraser gesture to control the directivity of the wipe area, the step of determining the attributes of the wipe area further includes: when only one corner of the wipe surface is in contact with the touch screen , The shape of the wiping area is a directional shape The shape of the directivity and the direction of the shape correspond to the posture.

In one embodiment, in order for the user to experience the electronic eraser gesture, the directivity of the wiping area can be controlled, wherein the shape of the wiping area includes a pointing angle, and the angle of the pointing angle corresponds to the wiping surface and the touch screen When the angle between the wiping surface and the touch screen is larger, the angle of the pointing angle is smaller.

In one embodiment, in order to let the user experience the posture of the electronic eraser, the wipe area can be controlled, wherein the size of the wipe area corresponds to one of the following parameters or any combination thereof: the angle between the wipe surface and the touch screen; The contact pressure of the corner; and the average contact pressure of the side where the wiped surface is in contact with the touch screen. The average contact pressure may be the average value of the contact pressures at the two corners that determine the side. In one embodiment, in order for the user to use the contact pressure to control the wiping change rate, the wiping change rate inside the wiping area is consistent, and the wiping change rate corresponds to the contact pressure of the corner. In one embodiment, in order to simulate the wiping scenario of a traditional eraser, the wiping change rate inside the wiping area is inconsistent, and the change of the wiping change rate corresponds to the direction of the directional shape. In one embodiment, in order to reflect that the shape of the electronic eraser is asymmetrical corresponding to the contact angle, the directivity shape is asymmetrical, and the directivity shape corresponds to the two adjacent sides of the corner and the touch Two corners of the screen. In one embodiment, in order to allow the control of the electronic eraser to be applied to a curved touch screen, when the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen.

According to an embodiment of the present invention, the electronic device further includes the aforementioned touch screen and an electronic eraser.

100‧‧‧Electronic System

110A, 110B‧‧‧Touch Pen

112‧‧‧hand

115, 115A, 115B‧‧‧electronic eraser

120‧‧‧Touch Panel

121‧‧‧First electrode

122‧‧‧Second electrode

130‧‧‧Touch processing device

140‧‧‧Host

150‧‧‧Display processing device

160‧‧‧Display

210‧‧‧Connect to the Internet

220‧‧‧Drive circuit

230‧‧‧Sensing circuit

240‧‧‧Embedded processor

250‧‧‧Host Interface

310‧‧‧Shell

320‧‧‧Input device

320A‧‧‧First button

320B‧‧‧Second button

330‧‧‧Wipe the surface

341‧‧‧First eraser electrode

342‧‧‧First eraser electrode

343‧‧‧The third eraser electrode

344‧‧‧The fourth eraser electrode

350‧‧‧Sensing electrode

410‧‧‧Drive circuit

420‧‧‧Sensing circuit

440‧‧‧embedded processor

450‧‧‧Battery

460‧‧‧Wireless Charging Module

510‧‧‧The first period

520‧‧‧Second period

521‧‧‧Lighthouse signal transmission period

522‧‧‧Stylus detection period

523‧‧‧Eraser detection period

524‧‧‧Lighthouse signal transmission period

530‧‧‧Time

540‧‧‧Time

611‧‧‧Message Transmission Period

641‧‧‧The first eraser electrode transmission period

642‧‧‧The second erasing electrode transmission period

643‧‧‧The third erasing electrode transmission period

644‧‧‧The fourth eraser electrode transmission period

710-765‧‧‧Step

810-820‧‧‧Step

910‧‧‧Projection area

911‧‧‧Short side

912‧‧‧long side

920‧‧‧Projection area

921‧‧‧Short side

922‧‧‧long side

941, 942, 943, 944‧‧‧ location

1000‧‧‧Three-dimensional reference coordinate system

1010‧‧‧First virtual vector

1020‧‧‧Projection vector

1030‧‧‧Second virtual vector

1102‧‧‧First included angle

1103‧‧‧Second included angle

1110‧‧‧Wipe area

1120‧‧‧Wipe area

1130‧‧‧Wipe area

1210‧‧‧Wipe area

1212‧‧‧pointing

1214‧‧‧Opening angle

1220‧‧‧Wipe area

1230‧‧‧Wipe area

1240‧‧‧Wipe area

1250‧‧‧Wipe area

1260‧‧‧Wipe area

1270‧‧‧Wipe area

1310‧‧‧Wipe area

1311‧‧‧Angle

1312‧‧‧Angle

1510~1540‧‧‧Step

FIG. 1 is a schematic diagram of an electronic system 100 according to an embodiment of the invention.

FIG. 2 is a block diagram of a touch processing device 130 according to an embodiment of the invention.

FIG. 3A is a top view of an electronic eraser 115 according to an embodiment of the invention.

FIG. 3B is a side view of the electronic eraser 115 according to an embodiment of the invention.

FIG. 3C is a bottom view of the electronic eraser 115 according to an embodiment of the invention.

FIG. 3D is a bottom view of the electronic eraser 115 according to an embodiment of the invention.

FIG. 3E is a bottom view of the electronic eraser 115 according to an embodiment of the invention.

FIG. 3F is a bottom view of the electronic eraser 115 according to an embodiment of the invention.

4 is a block diagram of an electronic eraser according to an embodiment of the invention.

FIG. 5A is an operation sequence diagram of the electronic system 100 according to an embodiment of the invention.

Fig. 5B is a variation of the embodiment of Fig. 5A.

Fig. 5C is a variation of the embodiment of Figs. 5A and 5B.

6A~G are operation timing diagrams of the stylus and eraser detection period 520 according to an embodiment of the present invention.

FIG. 7 is a schematic flowchart of an eraser detection method according to an embodiment of the invention.

Fig. 8 is a control method of an electronic eraser according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of two projection areas of the electronic eraser on the touch screen 120 according to an embodiment of the present invention.

FIG. 10 is a schematic diagram of the posture axis of the electronic eraser according to an embodiment of the present invention.

11A~C are posture side views and schematic diagrams of the wiping area according to three embodiments of the present invention.

FIG. 12 is a schematic diagram of the shape of the wiping area according to various embodiments of the present invention.

FIG. 13 is a schematic diagram of symmetrical and asymmetrical wiping area shapes according to various embodiments of the invention.

14A~C are schematic diagrams of the wiping change rate in the wiping area of multiple embodiments of the present invention.

FIG. 15 is a flowchart of a method for setting a wiping area according to an embodiment of the present invention.

Please refer to FIG. 1, which is a schematic diagram of an electronic system 100 according to an embodiment of the present invention. The electronic system 100 includes a host 140, which includes devices that control the overall operation of the electronic system 100, such as a central processing unit, a memory, and an interface for connecting peripheral I/O devices. The interface can include industry standard interfaces such as PCI, PCI-E, SATA, ATA, USB, and UART, or it can include a dedicated interface. The host 140 is connected to a display processing device 150 through the interface, which is used to connect to a display 160 and process the display content of the display 160. The host 140 is also connected to a touch processing device 130 through the interface, which is used to connect to a transparent touch panel 120 formed by a plurality of touch electrodes, and is used to use the touch panel 120 to detect approach or contact (referred to as Proximity) external conductive objects (such as hand 112), stylus 110A and 110B, electronic eraser 115A and electronic eraser 115B, etc. The transparent touch panel 120 includes a plurality of first electrodes 121 parallel to a first axis and a plurality of second electrodes 122 parallel to a second axis. The transparent touch panel 120 can be directly disposed on the display 160, or the touch panel 120 and the liquid crystal display 160 can be integrated to form an in-cell touch panel. The invention does not limit the combination of the transparent touch panel 120 and the display 160. In one embodiment, the touch screen 120 may be collectively referred to as the touch panel 120 and the display 160.

The central processing unit of the host 140 can execute the instructions and data stored in the non-volatile memory for executing the operating system and application programs. The host 140 and the display processing device 150 can individually or jointly control the display of the display 160 or the touch screen 120 according to the instructions of the operating system and the application program. In the present invention, it is collectively called that the host 140 controls the display. When the host 140 executes certain programs, the touch screen 120 will display a drawing area. When the stylus 110A Or when 110B is input in the drawing area, the drawing area will display the handwriting range of the stylus 110A or 110B accordingly. The display content within the handwriting range will change according to the input of the stylus 110A or 110B. Similarly, when the electronic eraser 115A or 115B is input in the drawing area, there will be a wipe area corresponding to the electronic eraser 115A or 115B in the drawing area. The display content in the wipe area will change according to the input of the electronic eraser 115A or 115B.

Please refer to FIG. 2, which is a block diagram of a touch processing device 130 according to an embodiment of the present invention. The touch processing device 130 includes an embedded processor 240 for connecting and controlling a connection network 210, a driving circuit 220, a sensing circuit 230, and a host interface 250. The driving circuit 220 can connect each of the first electrodes 121 and each of the second electrodes 122 through the connection network 210, so as to use these electrodes to send driving signals. The sensing circuit 230 can respectively connect each of the first electrodes 121 and each of the second electrodes 122 through the connection network 210 for sensing signals using these electrodes. The embedded processor 240 can communicate with the host 140 through the host interface 250. The embedded processor 240 can execute program modules stored in the non-volatile memory for detecting the aforementioned proximity objects and proximity events.

Please refer to FIG. 3A, which is a top view of an electronic eraser 115 according to an embodiment of the present invention. The electronic eraser 115 can be a rectangular parallelepiped, which includes a housing 310 for the user to hold, and contains a power module and a circuit that can be charged/wirelessly or can be replaced. The housing 310 may include more than one input device 320 on the top or side, for example, a first button 320A and a second button 320B. One of the buttons or switches can be used to open and close the electronic components inside the electronic eraser 115. In addition to traditional mechanical buttons, the input device 320 may be a scroll wheel, a multi-switch, a touch button, an accelerometer, a gyroscope, a motion sensor, and other devices. The housing 310 may also contain output devices, such as a light signal, a vibrator, and a sounder, for indicating the power or its usage status.

Please refer to FIG. 3B, which is a side view of the electronic eraser 115 according to an embodiment of the present invention. An elastic wiping surface 330 is provided under the casing 310. In addition to contacting the transparent touch panel 120, the wiping surface 330 can be used to wipe the handwriting written on a traditional whiteboard with a marker pen. The housing 310, the input device 320, and the wiping surface 330 may be made of waterproof material, and the connection part thereof may also be waterproof, so that the user can clean the electronic eraser 115.

Please refer to FIG. 3C, which is a bottom view of the electronic eraser 115 according to an embodiment of the present invention. In this embodiment, the wiping surface 330 includes a first eraser electrode 341, a second eraser electrode 342, and a third eraser electrode 343, which are located at three corners of the wiping surface 330, respectively. The wiping surfaces at the three corners can be made of elastic conductive material for the purpose of erasing electrodes.

Please refer to FIG. 3D, which is a bottom view of the electronic eraser 115 according to an embodiment of the present invention. In this embodiment, the wiping surface 330 includes a first eraser electrode 341, a second eraser electrode 342, a third eraser electrode 343, and a fourth eraser electrode 344, which are located at four corners of the wiping surface 330, respectively. The wiping surfaces of the four corners can be made of elastic conductive material for the purpose of erasing electrodes.

In one embodiment, the eraser electrodes 341 to 344 may include force sensors or be a part of the force sensors. These force sensors, such as force sensing resistors, force sensing capacitors and other passive components to sense pressure, or active components to sense pressure.

Regarding the passive force sensor, please refer to the description of the applicant's U.S. Patent Application No. US2015/0153845 and its priority documents. This application uses a stylus as an example, but it can be applied to the electronic eraser 115 of the present invention. For example, Figures 2-5 of the application use at least two signal sources with different frequencies to output a signal with a first frequency and a signal with a second frequency to the first element with a variable impedance value and a constant impedance value. The second element. The first element will be subjected to the pressure of the stylus tip (such as the eraser electrodes 341~344 in this case) to change its impedance value. The pen tip or eraser electrodes 341-344 will send electrical signals to the touch panel 120. A relationship between the amplitude of the first frequency signal and the amplitude of the second frequency signal in the electrical signal may represent the pressure value received by the pen tip or eraser electrodes 341 to 344.

Figures 7A to 7D of the application use a single frequency signal source to respectively output a signal with a first frequency and a signal with a second frequency to a first element with a variable impedance value and a second element with a constant impedance value. . The first element will be pressed by the tip of the stylus (such as the eraser electrodes 341-344 in this case) to change its impedance value. The electronic eraser 115 can respectively calculate the current values output by the first element and the second element, which represent the pressure values received by the pen tip or eraser electrodes 341 to 344.

Regarding the active force sensor, you can refer to the example of the Republic of China Invention Patent Application Publication No. 201339904, which also uses a stylus as an example, but can be applied to the electronic eraser 115 of the present invention. Just replace the stylus tip and signal transmitter with eraser electrodes 341~344.

Compared with the shape of the eraser electrode of FIG. 3C, the shape of the eraser electrode of FIG. 3D is different. The present invention does not limit the shape of the eraser electrodes 341 to 344. In FIG. 3D, the electronic eraser 115 further includes a sensing electrode 350. The sensing electrode 350 may be located on the surface of the wiping surface 330. Although the position of the sensing electrode 350 depicted in FIG. 3D is in the middle of the wiping surface 330, the present invention does not limit the position of the sensing electrode 350. The sensing electrode 350 can be used to receive the beacon signal from the touch panel 120. When the beacon signal is strong, the sensing electrode 350 does not need to be located on the surface of the wiping surface 330, but is disposed on the housing Within 310, the lighthouse signal can be sensed.

Please refer to FIG. 3E, which is a bottom view of the electronic eraser 115 according to an embodiment of the present invention. In this embodiment, the wiping surface 330 includes a first eraser electrode 341, a second eraser electrode 342, and a third eraser electrode 343. None of the three eraser electrodes 341~343 are at the corners of the wiping surface 330 Instead, a triangle is formed on the wiping surface 330. In order to identify the direction of the electronic eraser 115, each side of the triangle formed by the three eraser electrodes 341 to 343 is not equal in length. Accordingly, after detecting the positions of the eraser electrodes 341 to 343, the touch processing device 130 can calculate that the wiping surface 330 of the electronic eraser 115 is projected onto the surface of the touch panel 120.

Please refer to FIG. 3F, which is a bottom view of an electronic eraser 115 according to an embodiment of the present invention. In this embodiment, the wiping surface 330 is an oval shape. In other words, the electronic eraser 115 may be an elliptical cube, which is convenient for the user to hold. The present invention does not limit the shape of the electronic eraser 115 and its wiping surface 330, as long as it is convenient to use.

Please refer to FIG. 4, which is a block diagram of an electronic eraser according to an embodiment of the present invention. The electronic eraser 115 may include a driving circuit 410, a sensing circuit 420, an embedded processor 440, a battery 450, and a wireless charging module 460 connected to the battery 450. The battery 450 is used to supply power to the electronic components inside the electronic eraser 115. The driving circuit 410 is respectively connected to the aforementioned eraser electrodes 341 to 344 for sending electrical signals to the touch panel 120. The sensing circuit 420 is used to connect to the aforementioned sensing electrode 350 to detect the lighthouse signal. The embedded processor 440 is used to connect to the driving circuit 410, the sensing circuit 420, and the aforementioned input devices and output devices, such as the first button 320A and the second button 320B. The embedded processor 440 can execute a program module stored in a non-volatile memory to enable the touch processing device 130 to detect the action of the electronic eraser 115. The wireless charging module 460 can be used to receive a wireless charging signal to charge the battery 450. The wireless charging signal may come from the touch panel 120 or a specific wireless charging template.

Please refer to FIG. 5A, which is an operation sequence diagram of the electronic system 100 according to an embodiment of the present invention. In FIG. 5A, a first period 510 for external object detection and a first time period 510 for touch control are included. The second period 520 of pen and eraser detection. The present invention does not limit the ratio of the first time period 510 to the second time period 520 to be 1:1, nor does it limit that the first time period 510 and the second time period 520 must be interactively performed. When the touch processing device 130 determines that only an external object is in close contact with the control panel 120, the proportion of the second time period 520 can be reduced. When the touch processing device 130 determines that only the touch pen and eraser touch the control panel, the proportion of the first time period 510 can be reduced. The second period 520 includes a beacon signal transmission period 521, a stylus detection period 522, and an eraser detection period 523. In the present invention, the sequence of the stylus detection period 522 and the eraser detection period 523 is not limited, but the stylus detection period 522 and the eraser detection period 523 are after the beacon signal transmission period 521.

Please refer to FIG. 5B, which is a variation of the embodiment in FIG. 5A. In FIG. 5B, another lighthouse signal transmission period 524 is added to the second period 520. After the beacon signal is sent from the time period 521, the stylus pen 110 and the touch processing device 130 perform a process of detecting the stylus pen 110 in the time period 522. After another beacon signal is sent in the time period 524, the electronic eraser 115 and the touch processing device 130 perform the process of detecting the eraser in the time period 523. The stylus detection period 522 and the eraser detection period 523 do not have to be immediately after the period 521 and the period 524, respectively, and a blank (turnaround) period may be included in the middle for the stylus 110 and the electronic eraser 115 to receive processing and processing. ready.

Please refer to FIG. 5C, which is a variation of the embodiment of FIGS. 5A and 5B. In FIG. 5C, the detection of the stylus and the electronic eraser is performed in the disconnected periods 530 and 540, respectively. This is due to the habit of using, when using a stylus, the eraser is often not used. When using the eraser, do not use the stylus. Therefore, when the touch processing device 130 determines that only the touch pen wipes the touch control panel, the proportion of the time periods 510 and 540 can be reduced. When the touch processing device 130 determines that only the wiper is in close contact with the control panel, the proportion of the time periods 510 and 530 can be reduced.

Please refer to FIGS. 6A~G, which are a touch pen and a board according to an embodiment of the present invention The operation timing diagram of the erase detection period 520 can be applied to the eraser 115 in the embodiments of FIGS. 3A to F and FIG. 4. Although these embodiments take the stylus and eraser detection period 520 of FIG. 5A as an example, those of ordinary skill in the art can understand that if the stylus detection period 522 is omitted and the lighthouse signal transmission period 521 is replaced When it becomes the lighthouse signal transmission period 524, it can be applied to the embodiments of FIG. 5B and FIG. 5C.

In the embodiment of FIG. 6A, during the time period 521, the sensing circuit 420 can detect the beacon signal emitted by the touch panel 120 through the sensing electrode 350. Next, in the embodiments of FIGS. 3C, 3E, and 3F, the embedded processor 440 can make the driving circuit 410 transmit through the three erase electrodes 341 to 343, respectively, in the three time periods 641 to 643 to transmit the same first frequency The electrical signal is sent to the touch panel 120. After the beacon signal is sent, the touch processing device 130 can detect the electrical signal through the touch electrodes 121 and 122 on the touch panel 120, so as to find out that the three eraser electrodes 341 to 343 are relative to the touch The position of the panel 120.

Please refer to FIG. 6B, which is a variation of the embodiment in FIG. 6A. The same applies to the embodiments of FIGS. 3C, 3E, and 3F. The embedded processor 440 can enable the driving circuit 410 to transmit the input device 310 and/or the battery 450 through at least one eraser electrode in a period 611 after the three periods 641 to 643. 'S status message. For example, the first frequency is also used to transmit the message, but the present invention does not limit the use of the same signal modulation method to transmit the message. In a change, the driving circuit 410 transmits the above-mentioned message through the three eraser electrodes 341-343 at the same time during the time period 611.

Please refer to FIG. 6C, which is a variation of the embodiment shown in FIG. 6B and is applicable to the embodiment shown in FIG. 3D. The difference from the embodiment in FIG. 6B is that the embedded processor 440 uses four time periods 641 to 644 to enable the driving circuit 410 to emit signals of the same first frequency through the eraser electrodes 341 to 344, respectively. Since the user does not necessarily place the wiping surface 330 of the electronic eraser 115 flat on the touch The panel 120 is used up. The user may only use one corner or one side of the electronic eraser 115 to touch the touch panel 120, so that only one or two of the four eraser electrodes 341 to 344 are in close contact with the control panel 120, and the touch processing device 130 may not be able to receive two Or the electrical signals from three eraser electrodes. Therefore, in the time period 611, the driving circuit 410 transmits the above-mentioned message through the four eraser electrodes 341 to 344 at the same time, so as to ensure that the message sent by at least one eraser electrode can be received.

Please refer to FIG. 6D, which uses signals of two frequencies to shorten the time length of the erase detection period 523. The driving circuit 410 can simultaneously output signals of two frequencies to the two eraser electrodes, for example, output a first frequency signal to the first eraser electrode 341, and simultaneously output a second frequency signal to the third eraser electrode 343. In other words, the aforementioned first erase electrode transfer period 641 and the third erase electrode transfer period 643 can be overlapped. Then, the first frequency signal is output to the second erase electrode 342, and the second frequency signal is output to the fourth erase electrode 344 at the same time. In other words, the aforementioned second erase electrode transfer period 642 and the fourth erase electrode transfer period 644 can be overlapped. The present invention does not limit which two eraser electrodes output at the same time. The above two frequencies may not be the resonance frequencies of each other. After this, the aforementioned message transmission period 611 can also be added.

Please refer to FIG. 6E, which uses signals of four frequencies to shorten the time length of the erasing detection period 523. The driving circuit 410 can simultaneously output signals of four frequencies to the four eraser electrodes 341 to 344, so that the transmission periods 641 to 643 of the eraser electrodes are all overlapped at the same time. The above four frequencies may not be resonance frequencies of other frequencies. After this, the aforementioned message transmission period 611 can also be added. When applicable to the embodiments of FIGS. 3C, 3E, and 3F, it can be reduced from four frequencies to three frequencies.

Please refer to FIG. 6F. In addition to sending an electrical signal for the touch processing device 130 to detect the position, each of the eraser electrodes 341 to 344 can also send an electrical signal representing the pressure received. Such as As mentioned earlier, the related embodiments in Figures 2 to 5 of US2015/0153845, or a variation of the technical solution shown in the example of No. 201339904 can be used. In each erasing electrode transmission period 641 to 644, each erasing electrode 341 to 344 emits an electrical signal containing two frequencies in a minute, which is used to indicate the pressure value of the erasing electrode.

Please refer to FIG. 6G. Like FIG. 6F, each of the eraser electrodes 341 to 344 can emit an electrical signal representing the pressure received. As previously mentioned, the changes of the technical solutions shown in the related embodiments in FIGS. 7A-7D of US2015/0153845 can be used. In each erasing electrode transmission period 641 to 644, each of the erasing electrodes 341 to 344 sends out a modulated electrical signal at a minute, which is used to indicate the pressure value of the erasing electrode.

Please refer to FIG. 7, which is a schematic flowchart of an eraser detection method according to an embodiment of the present invention, which can be applied to the touch processing device 130 shown in FIG. 2.

Step 710: Send a beacon signal through the multiple touch electrodes of a touch panel 120. It can be a beacon signal in time period 521 or 524. It is possible to make the drive circuit 220 transmit a lighthouse signal through all the first electrodes 121, or make the drive circuit 220 transmit a beacon signal through all the second electrodes 122, or make the drive circuit 220 transmit through all the first electrodes 121 and all the first electrodes 121. The second electrode 122 sends out a beacon signal.

Step 721: After a predetermined period of time after step 710, the electrical signals from the first eraser electrode 341 are detected through the multiple touch electrodes 121 and 122 on the touch panel 120, and it is determined that the first eraser electrode 341 is close to the touch The location of the control panel 120.

Step 722: After a predetermined period of time after step 710, detect the electrical signal from the second eraser electrode 342 through the multiple touch electrodes 121 and 122 on the touch panel 120, and determine that the first eraser electrode 342 is close to the touch The location of the control panel 120.

Step 723: Wait a predetermined period of time after step 710, detect electrical signals from the third eraser electrode 343 through the multiple touch electrodes 121 and 122 on the touch panel 120, and determine that the third eraser electrode 343 is close to the touch The location of the control panel 120.

Optional step 724: after step 710, for a predetermined period of time, detect electrical signals from the fourth eraser electrode 344 through the multiple touch electrodes 121 and 122 on the touch panel 120, and determine that the fourth eraser electrode 344 is in close proximity At the position of the touch panel 120.

The above-mentioned steps 721 to 724 can be performed in a time-sharing manner as in FIGS. 6A to 6C and 6F to 6G, or simultaneously as in FIGS. 6D to 6E.

Optional step 730: After a predetermined period of time after step 710, detect the electrical signal emitted from at least one of the eraser electrodes 341 to 344 through the multiple touch electrodes 121 and 122 on the touch panel 120, and according to the The electrical signal determines the status of the input device and/or battery on the electronic eraser 115.

Step 740: It is determined that there are several close positions of the eraser electrodes. If there is only one position, it means that the user only uses one corner of the electronic eraser 115 to wipe the handwriting, and the process goes to step 750/760. If there are two positions, it means that the user uses one side of the electronic eraser 115 to wipe the handwriting, and the process goes to step 755/765.

Optional step 750: Determine the pressure value corresponding to the position. The above-mentioned electrical signal can be demodulated to obtain the pressure of the eraser electrode. The pressure value can also be judged according to the area size of the location.

Optional step 755: determine the pressure values corresponding to the multiple positions. The above-mentioned electrical signal can be demodulated to obtain the pressure received by the plurality of eraser electrodes. It is also possible to determine the corresponding pressure values respectively according to the sum of the area sizes of the multiple positions.

Step 760: Determine a wiping area according to the position (and the pressure value). If the pressure value can be calculated, the area of the wiping area can be changed according to the pressure value. For example, the larger the pressure value, the larger the area of the wiped area. The pressure value and the area value can be directly proportional or have a non-linear relationship.

Step 765: Determine a wiping area according to the multiple positions (and the multiple pressure values). If the sum or average of the pressure values can be calculated, the area of the wiping area can be changed according to the pressure value. For example, the larger the sum or average of the pressure values, the larger the area of the wiped area. The sum or average of the pressure values can be proportional to the area value, or have a non-linear relationship.

In another embodiment, the pressure value may have a proportional or non-linear relationship with the wiping change rate in the wiping area. The so-called wiping change rate here refers to the probability of each pixel in the wiping area being wiped. For example, when the wipe probability is 80%, 80% of the pixels in the wiped area will be wiped off, leaving 20% of the pixels unchanged.

In a further embodiment, the pressure value may have a proportional or non-linear relationship with the wiping change rate in the wiping area. The rate of wiping change referred to here may be the rate of change of each pixel in the wiping area. For example, the red, green, and blue values of the pixel are R, G, and B respectively. When the wipe change rate is 80%, the change rate of the pixel in a certain period of time is 0.2R, 0.2G, 0.2B. The above changes can simulate the wiping effect of a traditional eraser on a traditional whiteboard.

In some embodiments of the application, the electronic eraser can be used as a brush. The input device 310 on the eraser 115 can be used to switch the use mode of the electronic eraser. When the touch processing device 130 receives a state change of the input device 310 in step 730, it needs to notify the operating system and application programs executed by the host 140 in order to change the input mode of the electronic eraser.

In an embodiment, the embedded processor 440 of the electronic eraser 115 can enter the power saving mode. For example, after the electronic eraser 115 is placed under the touch panel 120 to stand still for a period of time, although the beacon signal can be received, if the processor 440 does not receive the signal from the accelerometer, gyroscope, or motion sensor When the signal is activated, the eraser electrode will not send an electrical signal in order to save power.

In another embodiment, the electronic eraser 115 is usually placed near the touch panel 120. Therefore, the electronic eraser 115 may further include a wireless charging module, which uses the lighthouse signal or charging signal sent by the touch panel 120 to charge the battery 450.

Please refer to FIG. 8, which is an electronic eraser control method according to an embodiment of the present invention, which can be applied to the electronic eraser 115 and its processor 440 of FIG. 4.

Step 810: Enable a sensing circuit inside an electronic eraser to sense a lighthouse signal from a touch panel through a sensing electrode of the electronic eraser.

Step 820: After receiving the lighthouse signal, a drive circuit inside the electronic eraser provides electrical signals to at least three eraser electrodes of the electronic eraser. The modulation method of the electrical signal includes one of the following: time-sharing and sequential transmission of electrical signals of the same frequency set through the at least three eraser electrodes; simultaneous transmission of status messages through one or more of the eraser electrodes; simultaneous transmission of at least two eraser electrodes The eraser electrode emits electric signals of different frequency sets; and the at least three eraser electrodes sequentially send out two electric signals of different frequency sets through the at least three eraser electrodes in a time-sharing sequence.

Please refer to FIG. 9, which is a schematic diagram of two projection areas of the electronic eraser on the touch screen 120 according to an embodiment of the present invention. When the shape of the electronic eraser is rectangular, the projection area 910 of the touch screen 120 is also rectangular when it is placed flat on the touch screen 120. The rectangle has two short sides 911 and two long sides 912. The length of the long side 912 is greater than that of the short side 911.

When the electronic eraser touches the same position of the touch screen 120 with the upper left corner, and the remaining part leaves the touch screen 120, the area of the projection area 920 will be smaller than the area of the projection area 910. The length of the long side 922 of the projection area 920 will be shorter than the long side 912 of the projection area 910. Similarly, the length of the short side 921 of the projection area 920 will be shorter than the short side 911 of the projection area 910. In theory, when the upper left corner is still in contact with the touch screen 120, the ratio of the short side 921 to the short side 911 can be compared, and then a first angle between the short side of the electronic eraser and the touch screen 120 can be known. Similarly, by comparing the ratio of the long side 922 to the long side 921, a second angle between the long side of the electronic eraser and the touch screen 120 can be known.

One of the premises for calculating the included angle is to determine that the upper left corner of the electronic eraser touches the touch screen 120. In the embodiments of FIGS. 3C and 3D, the corners of the electronic eraser 115 have eraser electrodes 341. When the touch processing device 130 detects the eraser electrode 341 through the touch screen 120 and the eraser electrode 341 feels a pressure value, it can determine that the upper left corner of the eraser electrode 341 is in contact with the touch screen 120.

As mentioned in the previous specification, the electronic eraser can use a passive force sensor to detect whether the eraser electrode is under pressure. Such as the description of the applicant's US Patent Application No. US2015/0153845 and its priority documents. When the eraser electrode 341 emits an electrical signal including two frequencies or frequency groups, the signal strength of one frequency or frequency group will change according to the variable impedance value in the force sensor. If the touch processing device detects that a proportional value of the signal strength of the two frequencies or frequency groups has changed, it can determine that the force sensor corresponding to the eraser electrode 341 is under pressure. When the touch processing device receives an electrical signal in the period corresponding to the erase electrode 341, or detects a specific frequency representing the erase electrode 341 in the received electrical signal, it can determine the force corresponding to the erase electrode 341 The upper left corner where the sensor is installed does touch Touch the touch screen 120, not just approach the touch screen 120.

In other embodiments, the electronic eraser 115 may have force sensors corresponding to each corner. When the force sensor in the upper left corner feels pressure, the signal transmitter of the electronic eraser 115 can transmit the pressure value to the touch processing device 130 or the signal receiver connected to the host 140 through the signal transmitter. The aforementioned signal transmitter and signal receiver may be wireless transmitters that comply with industry standards, such as wireless local area network (WLAN), Bluetooth, ZigBee, and so on. When the touch processing device 130 or the host 140 receives the non-zero pressure value in the upper left corner transmitted by the electronic eraser and detects the electrical signal sent by the eraser electrode 341, it can determine the force sensing corresponding to the eraser electrode 341 The upper left corner of the device does touch the touch screen 120, not just close to the touch screen 120. The present invention does not limit the touch processing device 130 to determine that it is in contact with the touch screen 120 through the electrical signal emitted by the eraser electrode 341. Two or more messages can be received from different sources, and used to determine that one corner of the electronic eraser touches the touch screen 120.

Furthermore, when the touch processing device 130 can determine that one corner of the electronic eraser 115 is in contact with the touch screen 120, it can also use the same or a different method to determine that the other corner of the electronic eraser 115 is in contact with the touch screen 120. 120. When the two corners are adjacent corners, it can be determined that one side of the electronic eraser 115 is in contact with the touch screen 120. When the two corners are opposite, it can be determined that the bottom surface or the wiping surface of the electronic eraser 115 is in contact with the touch screen 120.

When only one corner of the electronic eraser 115 touches the touch screen 120, the close position of the two adjacent corners of the corner can be further determined. In the embodiment of FIG. 3C or 3D, the touch processing device 130 determines the position of the two eraser electrodes 342 and 343 close to the touch screen 120 according to the electrical signals emitted by the eraser electrodes 342 and 343. In other words, the two corners corresponding to the two eraser electrodes 342 and 343 are suspended, and the two force sensors at these two corners do not Under pressure.

In the above-mentioned embodiment, since among the electrical signals emitted by the eraser electrode 342, a ratio of the signal strength of the two frequencies or frequency groups remains constant. Therefore, it can be determined that the eraser electrode 342 is not stressed. The same method can also be used to determine that the eraser electrodes 343 and 344 are not stressed. In another embodiment, when the force sensor corresponding to the three corners of the electronic eraser 115 is not receiving force, it can be transmitted to the touch processing device 130 or the signal receiver connected to the host 140 through the signal transmitter.

When the two adjacent corners of the eraser electrode 341 touching the touch screen 120 are not stressed, the touch processing device 130 can calculate the position close to the touch screen 120 according to the electrical signals emitted by the corresponding eraser electrodes 342 and 343. Since the distance between the eraser electrode 344 at the diagonal of the eraser electrode 341 of the touch screen 120 and the touch screen 120 is greater than or equal to the distance between the eraser electrode 342 or 343 and the touch screen 120, the touch processing device 130 may not be able to The position of the eraser electrode 344 close to the touch screen 120 is found based on the relatively weak electrical signal.

In the embodiment shown in FIG. 9, the touch processing device 130 can find out according to the electrical signals emitted by the eraser electrodes 341, 342, 343 and 344. The corner corresponding to the position 941 is under pressure, and it can be determined that the eraser electrode 341 is in contact with the touch screen 120. The three corners corresponding to the remaining positions 942, 943, and 944 are not under pressure, and it can be determined that the eraser electrodes 342, 343, and 344 are not in contact with the touch screen 120. The positions 941 and 942 form the short side 921, and the positions 941 and 943 form the long side 922. Since the lengths of the short side 911 and the short side 921 of the electronic eraser 115 are known, the ratio of the short side 921 to 911 can be used to calculate the first angle between the short side 921 and the touch screen 120. Similarly, since the lengths of the long side 912 and the long side 922 of the electronic eraser 115 are known, the ratio of the long sides 922 and 912 can be used to calculate the length of the long side 922 and the touch screen 120. Two included angles.

If the touch processing device 130 can find the corresponding positions 941, 942, 943, and 944, the connection of these four positions can be used as a boundary to form the projection area 920. Although the present invention uses the rectangular electronic eraser 115 of FIG. 3C or 3D as an example, it does not limit the shape of the electronic eraser 115 to a rectangle. In other embodiments, the projection shape formed by the multiple eraser electrodes located at multiple vertices may be any quadrilateral, such as a rhombus, a parallelogram, a trapezoid, a square, and so on. The projection shape can also be any polygon, such as three sides, five sides, six sides, and so on. In one embodiment, the projection area 920 is a wipe area corresponding to an area of a certain drawing application window, or the wipe area can be regarded as a color brush area with a certain background color. For example, when the background color is white, the color of the wipe area corresponding to the projection area 920 can be changed to white.

When the touch processing device 130 knows the projection shape of the electronic eraser 115 in advance, it can be known that the electronic eraser 115 is opposite to the touch screen 120 according to a contact point and the two sides extending from the contact point. In the posture of the touch screen 120. In another embodiment, the electronic eraser 115 may include more than one detection device such as gyroscopes, accelerometers, angular accelerometers, and electronic compasses, and the attitude of the electronic eraser 115 with respect to the ground can be measured. The host 140 may also include more than one detection device such as a gyroscope, an accelerometer, an angular accelerometer, an electronic compass, or a preset value, and the attitude of the touch screen 120 to the ground can be measured. After the electronic eraser 115 transmits the attitude toward the ground to the host 140, the host 140 can calculate the electronic eraser 115 relative to the touch screen according to the two attitudes of the electronic eraser 115 and the touch screen 120 against the ground. The posture of the screen 120.

Please refer to FIG. 10, which is a schematic diagram of the posture axis of the electronic eraser according to an embodiment of the present invention. The XY plane of the three-dimensional reference coordinate system 1000 in FIG. 10 is the plane of the touch screen 120 surface. The Z axis is an axis perpendicular to the XY plane. The origin of the three-dimensional reference coordinate system 1000 can be set to the point where an angle of the electronic eraser 115 contacts the touch screen 120, such as the position 941 in FIG. 9. In this embodiment, the electronic eraser 115 can set a first virtual direction or vector. For example, the two diagonal eraser electrodes 341 and 344 of the electronic eraser 115 can be used as the first virtual vector 1010. When the electronic eraser 115 is placed on the touch screen 120, the first virtual vector 1010 is located on the XY plane. When the electronic eraser 115 touches the touch screen 120 only by the eraser electrode 341, the first virtual vector 1010 is the three-dimensional vector emitted from the position 941. The projection vector 1020 of the first virtual vector 1010 projected on the XY plane may be a vector from position 941 to position 944.

In order to correctly represent the posture of the electronic eraser 115 corresponding to the touch screen 120, a second virtual vector 1030 can be set. The second virtual vector 1030 and the first virtual vector 1010 cannot be parallel to each other. In the embodiment shown in FIG. 10, the second virtual vector 1030 may be a vector extending from the eraser electrode 941 to the upper direction of the Z axis, and the first virtual vector 1010 is perpendicular to each other. When the electronic eraser 115 is placed on the touch screen 120, the second virtual vector 1030 is perpendicular to the XY plane. Those of ordinary skill in the art can understand that through the first virtual vector 1010 and the second virtual vector 1030 in the three-dimensional reference coordinate system shown in FIG. 10, the posture of the electronic eraser 115 relative to the touch screen 120 can be expressed .

The present invention does not limit the relationship between the two virtual vectors 1010 and 1030 relative to the electronic eraser 115, as long as the two virtual vectors are not parallel to each other. In other words, two virtual vectors can be used to represent the posture of the electronic eraser 115 relative to the touch screen 120. When the touch processing device 115 knows in advance the positions of the eraser electrodes of the electronic eraser 115 and the relationship between the two virtual vectors and the electronic eraser, those of ordinary skill in the art can understand that the short side shown in FIG. 9 can be used. 921 and long side 922 to calculate the first virtual The pseudo vector 1010 and the second virtual vector 1030. Conversely, after knowing the first virtual vector 1010 and the second virtual vector 1030 in the three-dimensional reference coordinate system, the data of the short side 921 and the long side 922 can also be calculated. The two are interchangeable.

In an embodiment of the present invention, the size and/or shape of the cursor or the wipe area can be determined according to one of the two virtual vectors 1010 and 1030 mentioned above, or according to the projection vector 1020 of the first virtual vector 1020. In another embodiment, the size and/or shape of the cursor or the wipe area can be determined according to the short side 921 and the long side 922 projected on the touch screen 120. In a further embodiment, the posture of the electronic eraser 110 relative to the touch screen 120 can be calculated according to the posture of the electronic eraser 115 relative to the ground and the posture of the touch screen 120 relative to the ground, to further determine the cursor Or the size and/or shape of the wiping area.

In one embodiment, when the touch screen 120 is a curved surface, the Z axis of the reference coordinate system shown in FIG. 10 is the normal to the position 941. In other words, the postures of the electronic eraser 115 and the touch screen 120 are determined based on the positions 941 where they are in contact with each other to determine the X, Y, and Z three axes of the reference coordinate system.

Please refer to FIGS. 11A to 11C, which are posture side views and schematic diagrams of the wiping area according to three embodiments of the present invention. The left side is a side view of the electronic eraser 115 touching the touch screen 115 on one side, and the right side is a top view of the wipe area of the touch screen 120. In the embodiment shown in FIG. 11A, when the electronic eraser 115 shown in FIG. 3C or 3D is placed flat on the touch screen 120, the wiping area 1110 is like the electronic eraser 115 in the projection area of the touch screen 120. The size ratio of the two is about one to one. However, the wiping area 1110 may be slightly larger than the projection area, and evenly protrude the projection area, so as to prevent the electronic eraser 115 from completely blocking the user's line of sight, so that the user cannot see the edge of the wiping area 1110.

In the embodiment shown in FIG. 11B, when the electronic eraser 115 is in contact with one side When the screen 120 is controlled, the angle between the wiping surface and the touch screen 120 is a first angle 1102. For example, when the long side 922 of the electronic eraser 115 contacts the touch screen 120, the first angle 1102 is the angle between the short side 921 and the touch screen 120. Conversely, when the short side 921 of the electronic eraser 115 contacts the touch screen 120, the first included angle 1102 is the included angle between the long side 922 and the touch screen 120. At this time, the area of the corresponding wiping area 1120 will be smaller than that of the wiping area 1120. In one embodiment, the area of the wiping area 1120 is related to the area of the wiping area 1110 and the first angle 1102. For example, the area of the wiping area 1120 may be a product of a function of the area of the wiping area 1110 and the first included angle 1102. The function can be linear or non-linear.

In the embodiment shown in FIG. 11C, the second included angle 1103 between the electronic eraser 115 and the touch screen 120 is greater than the first included angle 1102. At this time, the area of the wiping area 1130 will be smaller than the wiping area 1120. Similarly, the area of the wiping area 1130 is related to the area of the wiping area 1110 and the second included angle 1103. For example, the area of the wiping area 1120 may be a product of a function of the area of the wiping area 1110 and the second included angle 1103. The function can be linear or non-linear. In one embodiment, the strip-shaped wiping area has a minimum area. When the angle between the wiping surface and the touch screen 120 is greater than a threshold value, the area of the wiping area will not be reduced.

Please refer to FIG. 12, which is a schematic diagram of the shape of the wiping area according to various embodiments of the present invention. In Figure 12, there are three symmetrical wipe areas. The wiping areas 1210, 1220, 1230, 1260, and 1270 are isosceles triangles. The wiping area 1240 is of a water drop shape. The wiping area 1250 is a quadrilateral of arrow clusters. When a single corner of the electronic eraser 115 touches the touch screen 120, the wiping area can be changed into one of the above-mentioned shapes. The shape shown in FIG. 12 is only an example, and the present invention does not limit the shape of the wiping area.

In an embodiment, the pointing angle of the wiping area may correspond to the position 941. In an example, the opening angle 1214 of the pointing angle of the wiping area may correspond to the angle between the short side 921 and the touch screen 120. In another example, the opening angle 1214 of the wiping area may correspond to the angle between the long side 922 and the touch screen 120. In another example, the opening angle 1214 of the pointing angle may correspond to a function value corresponding to the angle between the short side 921 and the touch screen 120 and the angle between the long side 922 and the touch screen 120. For example, the opening angles 1214 of the pointing angles of the wiping areas 1210, 1220, and 1230 are from large to small.

In an embodiment, the direction 1212 of the wiping area may correspond to the projection vector 1020 shown in FIG. 10. The length of the wiping area may correspond to the length of the projection vector 1020. For example, when the angle between the wiping surface of the electronic eraser 115 and the plane of the touch screen is larger, its length is shorter and its area is smaller. The areas of the wiping areas 1230, 1260, and 1270 are from large to small, and the angle between the wiping area and the plane of the touch screen 120 is from small to large. The area of the wiping surface corresponds to the angle between the wiping area and the plane of the touch screen 120. In one embodiment, the wiping area has a minimum area. When the angle between the wiping surface and the touch screen 120 is greater than a threshold value, the area of the wiping area will not be reduced.

Please refer to FIG. 13, which is a schematic diagram of the symmetrical and asymmetrical wiping area shapes according to various embodiments of the present invention. As can be seen in FIG. 13, in addition to the symmetrical isosceles triangle wiping area 1210, it also includes a triangular wiping area 1310 that is not aligned right and left. The top corner of the wiping area 1310 is divided into two angles 1311 and 1312. In an embodiment, the two angles 1311 and 1312 may correspond to the angle between the short side 921 and the touch screen 120 and the angle between the long side 922 and the touch screen 120, respectively. Or vice versa, the two angles 1312 and 1311 may correspond to the angle between the short side 921 and the touch screen 120 and the angle between the long side 922 and the touch screen 120, respectively.

In one embodiment, the wiping area 1310 may include a first wiping area and phase Adjacent to a second wiping area. The shape and size of the first wiping area correspond to the angle between the short side 921 and the touch screen 120. The shape and size of the second wiping area correspond to the angle between the long side 922 and the touch screen 120. In an example, when the angle between the short side 921 and the touch screen 120 corresponds to the angle between the long side 922 and the touch screen 120, the first wiping area is symmetrical to the second wiping area.

Please refer to FIGS. 14A to 14C, which are schematic diagrams of the wiping change rate in the wiping area of various embodiments of the present invention. Among the three diagrams, the darker the color, the greater the rate of wipe change. In the wiping area shown in Figure 14A, the largest wiping change rate is at the tip. The farther away from the tip, the smaller the rate of wiping change. On the contrary, in the wiping area as shown in FIG. 14B, the smallest wiping change rate is at the tip. The closer to the tip, the smaller the rate of wiping change. In the embodiment shown in FIGS. 14A and 14B, the change of the wipe change rate is linear. However, the present invention does not limit the change of the wiping change rate to be linear.

The maximum value and/or minimum value of the wipe change rate can be set. Or according to the pressure of the eraser electrode 341, the maximum value of the wipe change rate is adjusted accordingly. In one embodiment, the wiping change rate of the wiping area may be the same, and the maximum value of the wiping change rate is also based on the pressure of the eraser electrode 341. The rate of wiping change can be between 0% and 100%.

In the four embodiments shown in FIG. 14C, the wiping change rate in all parts of the wiping area is the same, and the wiping change rate of the wiping area is based on the pressure of touching a corner of the touch screen 120. The pressure corresponding to the wiping area on the far right is the largest, and the pressure corresponding to the wiping area on the far left is the smallest.

Those of ordinary skill in the art can understand that the pressure applied to the eraser electrode 341 referred to in the present invention can be equivalent to the pressure applied to a corner of the touch screen 120. According to the principle of equal force and reaction force, it is also possible that the touch screen 120 is subjected to the electronic eraser. 115 of the pressure of the angle.

Please refer to FIG. 15, which is a flowchart of a wiping area setting method according to an embodiment of the present invention. The wiping area setting method can be applied to the host 140 of FIG. 1, and includes the following steps:

Step 1510: Receive the posture and contact pressure of the electronic eraser corresponding to the touch screen. The posture referred to in the present invention refers to the position of the electronic eraser corresponding to the touch screen.

In one embodiment, the host 140 can receive the posture and contact pressure of the electronic eraser calculated by the touch processing device 130 corresponding to the touch screen, wherein the touch processing device 130 is transmitted through the touch screen 120 Each touch electrode receives the electrical signal from each eraser electrode of the electronic eraser to calculate the position, and also obtains the contact pressure through the electrical signal. After knowing the proximity position of each eraser electrode, the posture of the electronic eraser corresponding to the touch screen can be calculated according to the relative position between the eraser electrodes of the electronic eraser.

In an example, the electrical signal of each eraser electrode includes electrical signals of two frequency sets. When the intensity ratio of the electrical signals of the two frequency sets is a preset value, the touch processing device determines that the eraser electrode is The stress is zero. When the intensity ratio of the electrical signals of the two frequency sets is not the preset value, the touch processing device determines that the pressure on the eraser electrode is greater than zero. In an example, the electrical signal emitted by each eraser electrode in a certain period of time contains information about the pressure value that has been modulated. The touch processing device demodulates the electrical signal of the period to obtain pressure value information.

In another embodiment, the host 140 may receive at least one contact from the electronic eraser from a channel other than the touch processing device 130 through a wired or wireless connection. Based on the pressure information, the touch processing device 130 receives the electrical signals of the eraser electrodes of the electronic eraser and the relative positions of the eraser electrodes of the electronic eraser to calculate the posture of the electronic eraser corresponding to the touch screen.

Step 1520: Determine whether at least one corner of the electronic eraser touches the touch screen? It can be determined whether the electronic eraser is in contact with the touch screen according to the contact pressure received in step 1510. When the contact pressure value is all zero, it means that the electronic eraser has not touched the touch screen. The flow can go to step 1540. When at least one corner of the electronic eraser touches the touch screen, the process proceeds to step 1530.

Step 1530: Determine the attribute of the wiping area according to the posture and/or the contact pressure.

In one embodiment, when the electronic eraser contacts the touch screen, the shape of the wipe area is determined. For example, when the wiping surface of the electronic eraser is flat on the touch screen, the shape of the wiping area corresponds to the shape of the wiping surface. When one side of the wiping surface contacts the touch screen, the shape of the wiping area may be a quadrilateral. When a corner of the wiping surface contacts the touch screen, the shape of the wiping area can be a directional shape, and the directional shape and the direction of the shape correspond to the posture.

In one embodiment, the shape includes a pointing angle, and the angle of the pointing angle corresponds to the angle between the wiping surface and the touch screen. Wherein, when the angle between the wiping surface and the touch screen is larger, the angle of the pointing angle is smaller.

In one embodiment, the size of the wiping area corresponds to one of the following parameters or any combination thereof: the angle between the wiping surface and the touch screen; the contact pressure of the corner; the average contact pressure of the side.

In one embodiment, the wiping change rate inside the wiping zone is consistent. In one embodiment, the wipe change rate corresponds to the contact pressure of the corner.

In one embodiment, the wiping change rate inside the wiping zone is inconsistent. In an embodiment, the change of the wipe change rate corresponds to the direction of the shape of the directivity.

In one embodiment, the shape of the directivity is asymmetrical. In one embodiment, the shape of the directivity corresponds to the two angles between the two adjacent sides of the corner and the touch screen.

In one embodiment, when the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen.

Step 1540: Pause for a period of time. When the electronic eraser leaves the touch screen, time can be temporarily reserved for other operation modes of the touch processing device, such as the mode of detecting external conductive objects or the mode of detecting stylus, etc.

According to an embodiment of the present invention, there is provided a method for setting a wipe area, including: receiving a posture and contact pressure of an electronic eraser corresponding to a touch screen; determining whether at least one corner of the electronic eraser touches the touch screen; and When at least one corner of the wiping surface of the electronic eraser contacts the touch screen, the attribute of a wiping area is determined according to any combination of the posture and the contact pressure.

In one embodiment, in order to receive the posture and contact pressure more quickly, or to have a higher update rate of the posture of the electronic eraser, the posture and the contact pressure are received from a touch connected to the touch screen. Control processing device, the touch processing device receives the electrical signals emitted by the multiple eraser electrodes of the electronic eraser through the touch electrodes included in the touch screen, so as to respond to the electrical signal and the multiple eraser electrodes The position calculates the posture and the contact pressure.

In one embodiment, in order to support an electronic eraser that can transmit information from a non-touch screen, the wipe area setting method further includes: receiving the contact pressure from the electronic eraser; and receiving a plurality of electronic erasers from the touch processing device The eraser electrode corresponds to a plurality of proximity events of the touch screen; and the posture and the contact pressure are calculated according to the plurality of proximity events, the relative position between the contact pressure and the plurality of eraser electrodes.

In one embodiment, in order for the user to experience the electronic eraser gesture to control the directivity of the wipe area, the step of determining the attributes of the wipe area further includes: when only one corner of the wipe surface is in contact with the touch screen At this time, the shape of the wiping area is a directional shape, and the directional shape and the direction of the shape correspond to the posture.

In one embodiment, in order for the user to experience the electronic eraser gesture, the directivity of the wiping area can be controlled, wherein the shape of the wiping area includes a pointing angle, and the angle of the pointing angle corresponds to the wiping surface and the touch screen When the angle between the wiping surface and the touch screen is larger, the angle of the pointing angle is smaller.

In one embodiment, in order to let the user experience the posture of the electronic eraser, the wipe area can be controlled, wherein the size of the wipe area corresponds to one of the following parameters or any combination thereof: the angle between the wipe surface and the touch screen; The contact pressure of the corner; and the average contact pressure of the side where the wiped surface is in contact with the touch screen. In one embodiment, in order for the user to use the contact pressure to control the wiping change rate, the wiping change rate inside the wiping area is consistent, and the wiping change rate corresponds to the contact pressure of the corner. The average contact pressure may be the average value of the contact pressures at the two corners that determine the side. In one embodiment, in order to simulate the wiping scenario of a traditional eraser, the wiping change rate inside the wiping area is inconsistent, and the change of the wiping change rate corresponds to the direction of the directional shape, as shown in FIG. 14A or FIG. Example shown in 14B. In an embodiment In order to reflect that the shape of the electronic eraser is asymmetrical to the contact angle, the directional shape is asymmetrical, and the directional shape corresponds to the two adjacent sides of the corner and the two sides of the touch screen. Angle. In one embodiment, in order to allow the control of the electronic eraser to be applied to a curved touch screen, when the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen.

According to an embodiment of the present invention, there is provided an electronic system for wiping area setting, including: a touch processing device connected to a touch screen; and a host connected to the touch processing device for executing non- The program stored in the volatile memory implements the following steps: receiving the posture and contact pressure of an electronic eraser corresponding to the touch screen; determining whether the electronic eraser touches the touch screen at least one corner; and when the electronic eraser When at least one corner of the wiping surface touches the touch screen, the attribute of a wiping area is determined according to any combination of the posture and the contact pressure.

In one embodiment, in order to receive the posture and the contact pressure more quickly, or to have a higher update rate of the posture of the electronic eraser, the posture and the contact pressure are received from the touch processing device, and the touch The processing device receives the electrical signals emitted by the eraser electrodes of the electronic eraser through the touch electrodes included in the touch screen, and thereby calculates the attitude and the eraser electrodes based on the relative positions between the electrical signals and the eraser electrodes. Contact pressure.

In one embodiment, in order to support an electronic eraser that can transmit information from a non-touch screen, the electronic system further includes: a signal receiver connected to the electronic eraser for receiving the signal from a signal transmitter of the electronic eraser The contact pressure, where the host is connected to the signal receiver, is further used to execute the program stored in the non-volatile memory to implement the following steps: the erase electrodes of the electronic eraser received from the touch processing device correspond to the Multiple proximity of touch screen Events; and according to the multiple proximity events, the relative positions between the contact pressure and the multiple eraser electrodes, the posture and the contact pressure are calculated.

In one embodiment, in order for the user to experience the electronic eraser gesture to control the directivity of the wipe area, the step of determining the attributes of the wipe area further includes: when only one corner of the wipe surface is in contact with the touch screen At this time, the shape of the wiping area is a directional shape, and the directional shape and the direction of the shape correspond to the posture.

In one embodiment, in order for the user to experience the electronic eraser gesture, the directivity of the wiping area can be controlled, wherein the shape of the wiping area includes a pointing angle, and the angle of the pointing angle corresponds to the wiping surface and the touch screen When the angle between the wiping surface and the touch screen is larger, the angle of the pointing angle is smaller.

In one embodiment, in order to let the user experience the posture of the electronic eraser, the wipe area can be controlled, wherein the size of the wipe area corresponds to one of the following parameters or any combination thereof: the angle between the wipe surface and the touch screen; The contact pressure of the corner; and the average contact pressure of the side where the wiped surface is in contact with the touch screen. The average contact pressure may be the average value of the contact pressures at the two corners that determine the side. In one embodiment, in order for the user to use the contact pressure to control the wiping change rate, the wiping change rate inside the wiping area is consistent, and the wiping change rate corresponds to the contact pressure of the corner. In one embodiment, in order to simulate the wiping scenario of a traditional eraser, the wiping change rate inside the wiping area is inconsistent, and the change of the wiping change rate corresponds to the direction of the directional shape, as shown in Figure 14A or Example shown in 14B. In one embodiment, in order to reflect that the shape of the electronic eraser is asymmetrical corresponding to the contact angle, the directivity shape is asymmetrical, and the directivity shape corresponds to the two adjacent sides of the corner and the touch Two corners of the screen. In one embodiment, in order to allow the control of the electronic eraser to be applied to a curved touch screen, When the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen.

According to an embodiment of the present invention, the electronic device further includes the aforementioned touch screen and an electronic eraser.

1510~1540‧‧‧Step

Claims (21)

A method for setting the wipe area, including: Receive the posture and contact pressure of an electronic eraser corresponding to a touch screen; Determine whether at least one corner of the electronic eraser touches the touch screen; and When at least one corner of the wiping surface of the electronic eraser contacts the touch screen, the attribute of a wiping area is determined according to any combination of the posture and the contact pressure. For example, the wiping area setting method of the first item of the scope of patent application, wherein the posture and the contact pressure are received from a touch processing device connected to the touch screen, and the touch processing device passes through the touch included in the touch screen. The control electrode receives the electrical signals sent by the multiple eraser electrodes of the electronic eraser, and thereby calculates the posture and the contact pressure according to the relative position between the electrical signal and the multiple eraser electrodes. For example, the wiping area setting method in item 1 of the scope of patent application includes: Receiving the contact pressure from the electronic eraser; The multiple eraser electrodes of the electronic eraser received from the touch processing device correspond to multiple proximity events of the touch screen; and The attitude and the contact pressure are calculated according to the multiple proximity events and the relative positions between the contact pressure and the multiple eraser electrodes. For example, the wiping area setting method of item 1 of the scope of patent application, wherein the step of determining the attributes of the wiping area further includes: When only one corner of the wiping surface is in contact with the touch screen, the shape of the wiping area is a directional shape, and the directional shape and the direction of the shape correspond to the posture. For example, the wiping area setting method of the first item of the scope of patent application, wherein the shape of the wiping area includes a pointing angle corresponding to the angle between the wiping surface and the touch screen, when the wiping surface and the touch screen The larger the screen angle, the smaller the pointing angle. For example, the wiping area setting method of the first item of the scope of patent application, wherein the size of the wiping area corresponds to one of the following parameters or any combination: The angle between the wiping surface and the touch screen; The contact pressure of the corner; and The average contact pressure of the side where the wiping surface is in contact with the touch screen. For example, in the wiping area setting method of item 4 of the scope of patent application, the wiping change rate inside the wiping area is consistent, and the wiping change rate corresponds to the contact pressure of the corner. For example, the wiping area setting method of item 4 of the scope of patent application, wherein the wiping change rate inside the wiping area is inconsistent, and the change of the wiping change rate corresponds to the direction of the directional shape. For example, the wiping area setting method of item 4 of the scope of patent application, wherein the shape of the directivity is asymmetrical, and the shape of the directivity corresponds to the two angles between the two adjacent sides of the corner and the touch screen. For example, the wipe area setting method of item 4 of the scope of patent application, wherein when the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen. An electronic system for setting the wipe area, including: A touch processing device connected to a touch screen; and A host connected to the touch processing device is used to execute the program stored in the non-volatile memory to implement the following steps: Receiving the posture and contact pressure of an electronic eraser corresponding to the touch screen; Determine whether at least one corner of the electronic eraser touches the touch screen; and When at least one corner of the wiping surface of the electronic eraser contacts the touch screen, the attribute of a wiping area is determined according to any combination of the posture and the contact pressure. For example, the electronic system of claim 11, wherein the posture and the contact pressure are received from the touch processing device, and the touch processing device receives a plurality of electronic erasers through the touch electrodes included in the touch screen The electrical signal emitted by the eraser electrode is used to calculate the posture and the contact pressure according to the relative position between the electrical signal and the plurality of eraser electrodes. For example, the electronic system of item 11 of the scope of patent application includes: A signal receiver connected to the electronic eraser for receiving the contact pressure from a signal transmitter of the electronic eraser, The host is connected to the signal receiver, and is further used to execute the program stored in the non-volatile memory to implement the following steps: The multiple eraser electrodes of the electronic eraser received from the touch processing device correspond to multiple proximity events of the touch screen; and The attitude and the contact pressure are calculated according to the multiple proximity events and the relative positions between the contact pressure and the multiple eraser electrodes. For example, the electronic system of item 11 of the scope of patent application, wherein the step of determining the attributes of the wipe area further includes: When only one corner of the wiping surface is in contact with the touch screen, the shape of the wiping area is a directional shape, and the directional shape and the direction of the shape correspond to the posture. For example, the electronic system of item 11 of the scope of patent application, wherein the shape of the wiping area includes a pointing angle, and the pointing angle corresponds to the angle between the wiping surface and the touch screen. When the wiping surface and the touch screen are The larger the angle, the smaller the angle of the pointing angle. For example, the electronic system of item 11 in the scope of patent application, wherein the size of the wipe area corresponds to one of the following parameters or any combination: The angle between the wiping surface and the touch screen; The contact pressure of the corner; and The average contact pressure of the side where the wiping surface is in contact with the touch screen. For example, in the electronic system of item 14 of the scope of patent application, the wipe change rate inside the wipe area is consistent, and the wipe change rate corresponds to the contact pressure of the corner. For example, in the electronic system of item 14 in the scope of patent application, the wiping change rate inside the wiping area is inconsistent, and the change of the wiping change rate corresponds to the direction of the directional shape. For example, the electronic system of item 14 of the scope of patent application, wherein the shape of the directivity is asymmetrical, and the shape of the directivity corresponds to the two angles between the two adjacent sides of the corner and the touch screen. For example, in the electronic system of item 14 of the scope of patent application, when the touch screen is curved, the posture is a partial plane relative to the position where the corner touches the touch screen. For example, the electronic system of one of the 11th to 20th items in the scope of patent application further includes the touch screen and the electronic eraser.

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