TWI653555B - Stylus and electronic system thereof - Google Patents

Abstract

The present application provides a stylus for receiving a wireless radio frequency signal emitted by a touch panel or a screen, comprising: a touch pen holder with an outer covering insulating material for holding by a user's hand; Receiving the wireless radio frequency signal; and a receiving circuit connected to the electrode, the receiving circuit being received in the stylus pen.

Description

Stylus and its electronic system

The present invention relates to touch electronic systems, and more particularly to styluses and electronic systems thereof.

The stylus can detect electrical signals from the touch panel/screen to perform certain functions. The electrical signals emitted by the touch panel can be called beacons. The beacon signal can be emitted by the electrodes of at least one touch panel. In some examples, the touch panel can emit a beacon signal through a plurality of parallel electrodes for detection by the stylus.

In one example, the stylus can utilize the beacon signal to perform a wake-up function. Since the stylus may use an electrical energy storage device to provide energy, in order to save energy consumption, the stylus may often enter a power saving mode. When the stylus detects the beacon signal, it can enter a more power-consuming mode of operation.

In another example, the stylus can utilize the beacon signal to perform signal synchronization functions. Since the touch processing device controlling the touch panel may perform different detection modes by using different time periods, for example, mutual capacitance detection of passive external conductive objects such as fingers during a certain period of time. The electrical signal emitted by the active stylus is detected during another period. It is also possible to coordinate multiple active styluses to emit electrical signals at different times. All of these require the touch processing device to utilize the beacon signal as a synchronization signal for notifying the stylus.

According to experience, most users spend most of their time holding the stylus by letting the pen tip leave the touch panel to think or move the hand. Since the stylus mostly uses the electrode of the pen tip to receive the above-mentioned beacon signal, when the pen tip is too far away from the touch panel, the stylus pen will not receive it, and will enter the power saving mode after a period of time. However, the user does not know that the stylus on the hand has entered a power saving state. When the user touches the stylus in the power saving to the touch panel, since it still takes a period of time to return to the normal working state, the stylus of the stylus just touching the touch panel does not appear and is brought to the use. Bad experience.

Of course, the emission intensity of the beacon signal can be enhanced to increase the beacon signal reception capability of the stylus. However, the electronic device of the touch panel may also use an electrical energy storage device to provide energy, and enhancing the emission intensity of the beacon signal may reduce the use time of the electronic device. In addition, enhancing the emission intensity of the beacon signal will increase the probability that the touch panel will interfere with other electronic devices. Therefore, how to improve the beacon signal receiving capability of the stylus suspended above the touch panel is a main concern of the present application.

Please refer to FIG. 1 , which is a schematic diagram of current flow of a conventional stylus and a touch panel. In FIG. 1, the surface of the pen or body of the conventional stylus 110 is a conductor that is connected to the local ground of the stylus circuit. There is a capacitance A between the tip of the touch panel/screen 120 and the stylus 110 and the pen, and the capacitor B is also provided between the stylus 110 and the ground, and the capacitor C is also provided between the electronic device and the ground.

The touch panel/screen 120 can include a plurality of parallel first electrodes 121 and a plurality of parallel second electrodes 122. The plurality of intersections of the two electrodes form sensing points of mutual capacitive touch. The beacon signal may be emitted through some or all of the first electrode 121 and/or the second electrode 122, or may be emitted by a specific other electrode. The present invention does not limit the beacon signal or radio frequency The signal is emitted by the first electrode 121 and/or the second electrode 122.

In FIG. 1, only one power circuit affects the ability of the circuit on the stylus 110 to detect the beacon signal. This loop is a circuit formed by sequentially connecting three capacitors A, B, and C in series. The voltage of this loop is provided by the beacon signal. The intensity of the signal that the stylus 110 can detect is approximately the potential difference between the potential received from the capacitor A and the ground potential of the stylus itself. Therefore, the closer the stylus 110 is to the touch panel 120, the stronger the detected signal, and vice versa.

Please refer to FIG. 2 , which is a schematic diagram of current flow of a conventional stylus and a touch panel. In FIG. 2, the surface of the pen or body of the conventional stylus 110 is a conductor that is connected to the ground potential of the stylus circuit. There is a capacitance A between the tip of the touch panel/screen 120 and the stylus 110 and the pen, and the capacitor B is also provided between the stylus 110 and the ground, and the capacitor C is also provided between the electronic device and the ground. A hand 130 holds the conductor of the stylus 110 pen or the pen body to form a capacitor D, and has a capacitance E between the human body and the ground.

In FIG. 2, when the hand 130 holding the pen 110 is far away from the touch panel, the capacitance between the hand and the touch panel is small. Therefore, the signal strength that the stylus 110 can detect is also about the capacitance. The potential difference between the potential received by A and the ground potential of the stylus itself. The closer the stylus 110 is to the touch panel 120, the stronger the detected signal, and vice versa.

Please refer to FIG. 3 , which is a schematic diagram of current flow of a conventional stylus and a touch panel. Compared with FIG. 2, the hand 130 of FIG. 3 contacts the touch panel 120, forming a capacitance F. Since the touch panel 120 is additionally coupled to the stylus 110 through the capacitor F, the hand 130, and the capacitor D, when the hand 130 is a good conductor and receives the beacon signal of the touch panel 120, the stylus 110 itself is grounded by the hand. 130 contact coupling, the potential is pulled close to the potential of the beacon signal received from capacitor D. Because the potential of the lighthouse signal received by the stylus 110 from the capacitor A is greater than its own ground potential. As the image is pulled closer, the potential difference becomes small, so the intensity of the beacon signal detected by the stylus becomes very weak.

Even if the hand 130 holding the pen 110 does not touch the touch panel, the capacitance F between the hand 130 and the touch panel 120 will have a considerable influence on the ground potential of the capacitor pen itself within a considerable distance. The closer the pen 110 is to the touch panel 120, the closer the ground potential of the stylus 110 itself is to the lighthouse signal emitted by the touch panel 120. Therefore, when the distance between the stylus 110 and the touch panel 120 is fixed, the closer the hand 130 is to the touch panel 120, the weaker the signal detected by the stylus 110 is, and vice versa.

Therefore, how to improve the beacon signal receiving capability of the stylus suspended above the touch panel is one of the problems to be solved by the present application, especially when the hand touches the touch panel/screen of the stylus, the stylus The problem of the beacon signal was not detected in time.

According to an embodiment of the present application, a stylus is provided for receiving a wireless radio frequency signal emitted by a touch panel or a screen, comprising: a touch pen with an outer covering insulating material for the user's hand Holding; an electrode to receive the wireless RF signal; and a receiving circuit connected to the electrode, the receiving circuit is received in the stylus.

In one embodiment, in order to insulate the stylus from the user's hand to enhance the ability of the receiving circuit to receive the beacon signal or the radio frequency signal, the stylus is integrally constructed of an insulating material.

In an embodiment, in order to facilitate the stylus to receive the lighthouse signal or the wireless radio frequency signal, the electrode is one of or any combination thereof: one end electrode of a pointed segment of the stylus; and a first part surrounding the pen tip segment a ring-shaped electrode; and a second ring-shaped electric circuit surrounding the stylus pen a pole, wherein the nib segment is a portion where the cross-sectional area of the stylus gradually becomes smaller. In the above embodiment, in order to reduce the resistance of the electrode to improve the receiving capability, the first ring-shaped electrode includes a plurality of independent electrodes disposed around the pen tip segment. In the above embodiment, in order to reduce the resistance of the electrode to improve the receiving capability, the second ring-shaped electrode includes a plurality of independent electrodes disposed around the stylus.

In an embodiment, in order to synchronize the signal interaction between the stylus and the touch panel or the screen, the stylus further includes a driving circuit, and a processing circuit for connecting the driving circuit and the a receiving circuit, after the receiving circuit receives the wireless RF signal, the processing circuit causes the driving circuit to send a driving signal through at least one end electrode of the tip of the stylus, so that the touch panel or the screen is connected A touch processing device can analyze the driving signal to know a relative position of the stylus to the touch panel or the screen. In the above embodiment, in order to simplify the design of the stylus to use the passive component, the power source of the processing circuit, the receiving circuit and the driving circuit is a wireless radio frequency signal sensed by the electrode. In the above embodiment, in order to increase the intensity and modulation capability of the stylus control driving signal, the stylus further includes a battery for supplying power to the processing circuit, the receiving circuit and the driving circuit.

According to an embodiment of the present application, an electronic system includes an electronic device having a touch panel or a screen, and a stylus for receiving a wireless transmission from the touch panel or the screen The RF signal comprises: a touch pen holder with an outer covering insulating material for holding by the user's hand; an electrode for receiving the radio frequency signal; and a receiving circuit connecting the electrode, the receiving circuit is received by the receiving circuit Among the stylus bars.

According to the stylus provided by the above embodiments, since the stylus is in an insulating relationship with the hand held by the hand, the receiving touch can be enhanced when the hand approaches or touches the touch panel or the screen. The ability of a beacon signal from a panel or screen. Accordingly, the stylus can be activated at a distance from the touch panel or the screen, thereby avoiding or reducing the consumption of the stylus in sleep when it first contacts the touch panel or the screen. Time to improve user experience.

110‧‧‧ stylus

120‧‧‧Touch panel or screen

121‧‧‧First electrode

122‧‧‧second electrode

130‧‧‧Hands

410‧‧‧ stylus

600‧‧‧Electronic system

610‧‧‧ stylus

611‧‧‧ pen tip

612‧‧‧End electrode

613‧‧‧First ring electrode

614‧‧‧second ring electrode

615‧‧‧Touch pen

616‧‧‧ receiving circuit

617‧‧‧ drive circuit

618‧‧‧Processing circuit

619‧‧‧Battery

620‧‧‧Electronic devices

630‧‧‧Touch panel or screen

640‧‧‧Touch processing device

650‧‧‧Central Processing Unit

A~F, D’‧‧‧ capacitor

FIG. 1 is a schematic diagram of current flow of a conventional stylus and a touch panel.

2 is a schematic diagram of current flow of a conventional stylus and a touch panel.

FIG. 3 is a schematic diagram of current flow of a conventional stylus and a touch panel.

FIG. 4 is a schematic diagram of current flow of a stylus and a touch panel according to an embodiment of the present application.

FIG. 5 is a schematic diagram of current flow of a stylus and a touch panel according to an embodiment of the present application.

6 is a schematic diagram of an electronic system in accordance with an embodiment of the present invention.

The invention will be described in detail below with some embodiments. However, the invention may be applied to other embodiments in addition to the disclosed embodiments. The scope of the present invention is not limited by the embodiments, which are subject to the scope of the claims. To provide a clearer description and to enable those skilled in the art to understand the invention, the various parts of the drawings are not drawn according to their relative dimensions, and the ratio of certain dimensions to other related dimensions will be highlighted. The exaggerated and irrelevant details are not completely drawn to illustrate the simplicity of the illustration.

Please refer to FIG. 4 , which is a schematic diagram of current flow of a stylus and a touch panel according to an embodiment of the present application. The exterior of the stylus 410 is an insulating material, or a portion of the stylus 410 that is in contact with the hand 130 is an insulating material. Compared with the current loop of Figure 2, due to the diagram The stylus 410 of the embodiment is electrically uncoupled from the hand 130, so the capacitance D' between the stylus 410 and the hand 130 is smaller than the capacitance D in FIG. When the hand 130 holding the pen 410 is far away from the touch panel 120, the capacitance between the hand 130 and the touch panel 120 is small. Therefore, the signal strength that the stylus 410 can detect is also about from the capacitor A. The potential difference between the received potential and the ground potential of the stylus 410 itself. The closer the stylus 410 is to the touch panel 120, the stronger the detected signal, and vice versa.

Please refer to FIG. 5 , which is a schematic diagram of current flow of a stylus and a touch panel according to an embodiment of the present application. Compared with FIG. 4, the hand 130 of FIG. 5 contacts the touch panel 120, forming a capacitance F. Since the touch panel 120 is additionally coupled to the stylus 410 through the capacitor F, the hand, and the capacitor D, when the hand 130 is a good conductor and receives the beacon signal of the touch panel 120, the ground potential of the stylus 410 itself is not with the hand. 130 contact coupling, at most capacitive coupling, the ground potential of stylus 410 itself is little affected by the potential of the beacon signal received from capacitor D'. Therefore, the signal strength that the stylus 410 can detect is also approximately the potential difference between the potential received from the capacitor A and the ground potential of the stylus 410 itself. The closer the stylus 410 is to the touch panel 120, the stronger the detected signal, and vice versa.

Similarly, the hand 130 holding the pen 410 does not touch the touch panel, and even within a considerable distance, the light source signal received by the capacitance F between the hand 410 and the touch panel 130 has a limited influence on the capacitive pen itself. The closer the stylus 410 is to the touch panel 120, the stronger the detected signal, and vice versa. Therefore, compared with the embodiment of FIG. 3, in the same case, when the stylus 410 and the hand 130 have an insulating substance, the intensity of the lighthouse signal detected by the stylus 410 of the embodiment of FIG. 5 is relatively A lot better. In other words, the stylus 410 can detect the beacon signal further away from the touch panel/screen 120. Or enjoy a better distance from the touch panel/screen 120 The signal-to-noise ratio, that is, the beacon signal receiving capability of the stylus 410 suspended above the touch panel 120 is improved.

In order to insulate the stylus 410 from the hand 130, in one embodiment, the pen body structure of the stylus 410 is an insulating material. In an embodiment, the outer surface of the stylus 410 is covered with an insulating material.

In order to be applicable to various styluses 410 that emit electrical signals, in one embodiment, the stylus 410 can be a stylus that actively emits electrical signals. In another embodiment, the stylus 410 can be an inductive stylus that passively emits electrical signals.

In order to sense the beacon signal, the stylus 410 can be used to arrange the sensing electrodes closer to the touch panel/screen 120 when in use. In an embodiment, the stylus 410 can sense the beacon signal using the electrodes of the nib segment. In one embodiment, the stylus 410 can sense the beacon signal using a ring-shaped electrode that surrounds the tip segment. In an embodiment, the stylus 410 can sense the beacon signal using electrodes behind the nib segment.

A person skilled in the art can also easily infer that the stylus 410 is not limited to receiving the beacon signal of the touch panel, and can also receive the driving signal transmitted by the touch panel 120 through the driving electrode. The beacon signal or the drive signal can be used not only as a trigger, but also to transmit information to the stylus 410 in an analog or digital manner.

Please refer to FIG. 6, which is a schematic diagram of an electronic system 600 in accordance with an embodiment of the present invention. The electronic system 600 includes a stylus 610 and an electronic device 620. The electronic device 620 includes a touch panel or screen 630 , a touch processing device 640 connected to the touch panel or screen 630 , and a central processing unit 650 connected to the touch processing device 640 . The touch panel or screen 630 includes a plurality of parallel first electrodes and a plurality of parallel second electrodes. More of these two electrodes The intersection points form the sensing points of the mutual capacitive touch. The beacon signal emitted by the touch processing device 640 may be transmitted through some or all of the first electrode and/or the second electrode, or may be emitted by a specific other electrode. The invention does not define that the beacon signal or the radio frequency signal is emitted by the first electrode and/or the second electrode. In an embodiment, after the beacon signal or the radio frequency signal is sent to synchronize the stylus 610, the touch processing device 640 also receives the electrical signal sent by the stylus 610 through the first electrode and the second electrode, so that Knowing the relative position of the stylus 610 and the touch panel or the screen 630, it is also possible to know the state of the stylus 610, such as the pressure on the stylus tip and the button or sensors on the stylus. status. Then, the touch processing device 640 reports the information related to the stylus 610 to the operating system and the application software executed by the central processing unit 650.

The stylus 610 includes a pointed segment 611 and a stylus 615. The nib segment 611 is a portion whose cross-sectional area is gradually reduced, and may include an end electrode 612 and/or a first annular electrode 613 surrounding the nib segment 611. The stylus 610 can include a second annular electrode 614 surrounding the stylus 615. The first ring-shaped electrode 613 can be a single electrode or comprise a plurality of independent electrodes. The second annular electrode 614 can be a single electrode or comprise a plurality of separate electrodes. The outer layer of the stylus pen 615 is covered with an insulating material for the user's hand to hold. In one example, the stylus pen 615 is constructed of an insulating material as a whole. The invention does not limit the cross-sectional area of the pen tip segment 611 and the stylus pen 615 to be circular, and the cross-sectional area thereof may be other shapes. Therefore, the cross section of the first annular electrode 613 and the second annular electrode 614 may be a circular or other latching shape.

The receiving pen 615 can be internally provided with a receiving circuit 616. The receiving circuit 616 can be connected to all or one of the end electrode 612, the first ring electrode 613 and the second ring electrode 614 for receiving. a radio frequency signal sent by the touch panel or screen 630 number.

A driving circuit 617 and a processing circuit 618 connected to the driving circuit 617 and the receiving circuit 616 can be disposed inside the stylus pen 615. After the receiving circuit 616 receives the beacon signal or the radio frequency signal, the processing circuit 618 causes the driving circuit 617 to send a driving signal through at least one end electrode 612 of the tip segment 611 of the stylus 610, so that the touch is connected. The touch processing device 640 of the control panel or the screen 630 can analyze the driving signal to know a relative position of the stylus 610 and the touch panel or the screen 640.

In one embodiment, the power source of the processing circuit 618, the receiving circuit 616, and the driving circuit 617 is a wireless radio frequency signal sensed by an electrode connected to the receiving circuit 616. In another embodiment, the stylus 610 further includes a battery 619 for supplying power to the processing circuit 618, the receiving circuit 616, and the driving circuit 617.

According to an embodiment of the present application, a stylus is provided for receiving a wireless radio frequency signal emitted by a touch panel or a screen, comprising: a touch pen with an outer covering insulating material for the user's hand Holding; an electrode to receive the wireless RF signal; and a receiving circuit connected to the electrode, the receiving circuit is received in the stylus.

In one embodiment, in order to insulate the stylus from the user's hand to enhance the ability of the receiving circuit to receive the beacon signal or the radio frequency signal, the stylus is integrally constructed of an insulating material.

In an embodiment, in order to facilitate the stylus to receive the lighthouse signal or the wireless radio frequency signal, the electrode is one of or any combination thereof: one end electrode of a pointed segment of the stylus; and a first part surrounding the pen tip segment a ring-shaped electrode; and a second annular electrode surrounding the stylus pen, wherein the pen tip segment is a portion where the cross-sectional area of the stylus is gradually reduced. In the above embodiment, In order to reduce the resistance of the electrode to enhance the receiving capability, the first ring-shaped electrode includes a plurality of independent electrodes disposed around the pen tip segment. In the above embodiment, in order to reduce the resistance of the electrode to improve the receiving capability, the second ring-shaped electrode includes a plurality of independent electrodes disposed around the stylus.

In an embodiment, in order to synchronize the signal interaction between the stylus and the touch panel or the screen, the stylus further includes a driving circuit, and a processing circuit for connecting the driving circuit and the a receiving circuit, after the receiving circuit receives the wireless RF signal, the processing circuit causes the driving circuit to send a driving signal through at least one end electrode of the tip of the stylus, so that the touch panel or the screen is connected A touch processing device can analyze the driving signal to know a relative position of the stylus to the touch panel or the screen. In the above embodiment, in order to simplify the design of the stylus to use the passive component, the power source of the processing circuit, the receiving circuit and the driving circuit is a wireless radio frequency signal sensed by the electrode. In the above embodiment, in order to increase the intensity and modulation capability of the stylus control driving signal, the stylus further includes a battery for supplying power to the processing circuit, the receiving circuit and the driving circuit.

According to an embodiment of the present application, an electronic system includes an electronic device having a touch panel or a screen, and a stylus for receiving a wireless transmission from the touch panel or the screen The RF signal comprises: a touch pen holder with an outer covering insulating material for holding by the user's hand; an electrode for receiving the radio frequency signal; and a receiving circuit connecting the electrode, the receiving circuit is received by the receiving circuit Among the stylus bars.

According to the stylus provided by the above embodiments, since the stylus is in an insulating relationship with the hand held, the lighthouse of the receiving touch panel or the screen can be enhanced when the hand approaches or touches the touch panel or the screen. The ability of the signal. According to this, it can be compared to the touch panel or the screen. Keep the stylus active in a far place, thereby avoiding or reducing the time it takes for the stylus in sleep to return to activation when it first touches the touch panel or screen, thereby improving the user experience.

Claims (10)

A stylus for receiving a wireless radio frequency signal emitted by a touch panel or a screen, comprising: a touch pen holder covered with an insulating material for holding by a user's hand; and an electrode for receiving the wireless The radio frequency signal, wherein the touch panel or the screen comprises a plurality of parallel first electrodes and a plurality of parallel second electrodes, the wireless radio frequency signal is sent through part or all of the first electrode or the second electrode; A receiving circuit of the electrode, the receiving circuit being received in the stylus pen. For example, in the stylus of claim 1, the stylus of the above-mentioned stylus is made of an insulating material. The stylus according to claim 1, wherein the electrode is one of the electrodes or any combination thereof: an end electrode of a pointed segment of the stylus; a first annular electrode surrounding the pen tip segment; And a second annular electrode surrounding the stylus pen, wherein the pen tip segment is a portion where the cross-sectional area of the stylus is gradually reduced. The stylus of claim 3, wherein the first annular electrode comprises a plurality of independent electrodes disposed around the pen tip segment. The stylus of claim 3, wherein the second ring electrode comprises a plurality of individual A vertical electrode is disposed around the stylus. The stylus of claim 1 further includes: a driving circuit; and a processing circuit for connecting the driving circuit and the receiving circuit, after the receiving circuit receives the wireless RF signal, The processing circuit causes the driving circuit to emit a driving signal through at least one end electrode of the tip of the stylus, so that a touch processing device connected to the touch panel or the screen can analyze the driving signal to learn the touch. A relative position of the pen to the touch panel or screen. The stylus according to claim 6, wherein the processing circuit, the receiving circuit and the driving circuit are powered by a radio frequency signal induced by the electrode. A stylus as claimed in claim 6 further includes a battery for supplying power to the processing circuit, the receiving circuit and the driving circuit. An electronic system comprising: an electronic device having a touch panel or a screen, wherein the touch panel or screen comprises a plurality of parallel first electrodes and a plurality of parallel second electrodes; and a stylus, wherein the The stylus is configured to receive a radio frequency signal sent by the touch panel or the screen, where the radio frequency signal is sent through part or all of the first electrode or the second electrode, and includes: The outer cover is covered with a touch pen of insulating material for holding by the user's hand; an electrode for receiving the wireless radio frequency signal; and a receiving circuit for connecting the electrode, the receiving circuit is received in the stylus pen . The electronic system of claim 9, wherein the stylus further comprises: a driving circuit; and a processing circuit for connecting the driving circuit and the receiving circuit, when the receiving circuit receives the After the wireless RF signal, the processing circuit causes the driving circuit to send a driving signal through at least one end electrode of the tip of the stylus, so that a touch processing device connected to the touch panel or the screen can analyze the driving signal. To know the relative position of the stylus and the touch panel or the screen.