CN107346906B - Wireless system, active pen and mode switching method - Google Patents
Wireless system, active pen and mode switching method Download PDFInfo
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- CN107346906B CN107346906B CN201610297002.0A CN201610297002A CN107346906B CN 107346906 B CN107346906 B CN 107346906B CN 201610297002 A CN201610297002 A CN 201610297002A CN 107346906 B CN107346906 B CN 107346906B
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- 238000000034 method Methods 0.000 title claims description 13
- 230000006698 induction Effects 0.000 claims abstract description 101
- 238000004891 communication Methods 0.000 claims abstract description 49
- 230000001939 inductive effect Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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Abstract
The invention provides an active pen, which comprises a flexible circuit board, a rectifying circuit, a near field communication circuit and a mode selector switch, wherein the flexible circuit board is connected with the rectifying circuit; the flexible circuit board comprises a plurality of induction coils; at least one of the induction coils and an external coil induce an induction current, and one of the induction coils comprises an external coil and an internal coil; the rectifying circuit receives the induction current, rectifies the induction current and provides a rectified current for a load; the mode switch determines an operation mode of the active pen according to an input signal; when the active pen is in a near field communication mode, the inner coil is disconnected from the outer coil through the mode selector switch and connected to the near field communication circuit, and when the active pen is in a charging mode, the inner coil is connected to the outer coil through the mode selector switch.
Description
Technical Field
The present invention relates to an active pen, and more particularly, to an active pen capable of switching operation modes.
Background
Today's portable electronic devices (e.g., tablet computers or smart phones) are widely used in various fields. And the user can use the active pen to operate the portable electronic devices. Generally, active pens are divided into active and passive types. Passive active pens are easy to obtain but are not accurate enough, and active pens can meet the user's requirement for accurate input, but must have a power source, such as a battery, to operate.
The battery of the active pen can be designed to be charged in a wireless charging manner, and a user can place the active pen on a wireless charging pad to charge the active pen. When the active pen is placed on the wireless charging panel, an induction coil of the active pen must be aligned with a charging coil of the wireless charging panel, so as to achieve the best charging efficiency. However, the pen body of the active pen is generally designed to be a cylinder or a corner post, so that the active pen is easy to roll when being placed on the wireless charging board and cannot be aligned accurately, which affects the charging efficiency of the active pen.
Disclosure of Invention
In view of the above, the present invention provides an active pen to solve the above problems.
The invention provides an active pen, which comprises a shell, a flexible circuit board, a rectifying circuit, a near field communication circuit and a mode selector switch. The flexible circuit board is installed in the shell and comprises a plurality of induction coils. At least one of the induction coils induces an external coil to generate an induced current, and one of the induction coils includes an outer coil and an inner coil. The rectifying circuit receives the induction current, rectifies the induction current and provides a rectified current to a load. The mode switch is connected to the outer coil, the inner coil and the near field communication circuit, and determines an operation mode of the active pen according to an input signal, wherein the operation mode comprises a charging mode and a near field communication mode. When the active pen is in the near field communication mode, the inner coil is disconnected with the outer coil through the mode selector switch and is connected to the near field communication circuit so as to communicate with an external electronic device, and when the active pen is in the charging mode, the inner coil is connected to the outer coil through the mode selector switch.
The present invention further provides a method for switching modes, which is used for an active pen, wherein the active pen comprises a plurality of induction coils and a near field communication circuit, one of the induction coils comprises an outer coil and an inner coil, and the method comprises the following steps: determining an operation mode of the active pen according to an input signal through a mode switch; when the mode switch receives the input signal, the inner coil is disconnected with the outer coil through the mode switch and is connected to the near field communication circuit, so that the active pen is in a near field communication mode in the operation mode; and when the mode switch does not receive the input signal, the mode switch connects the inner coil to the outer coil so as to enable the active pen to be in a charging mode in the operation mode.
The invention provides a wireless system, which comprises an active pen and a color wheel. The active pen comprises an induction coil, a near field communication circuit and a control chip. The control chip is used for controlling the near field communication circuit and the induction coil to carry out wireless communication with an electronic device. The color disc comprises a plurality of induction labels, each induction label is provided with identification data, and the identification data are different from each other and correspond to a color. The control chip controls the near field communication circuit and the induction coil to induce one of the induction tags so as to acquire the identification data of the one of the induction tags, and the control chip transmits the identification data to the electronic device through the near field communication circuit and the induction coil.
The invention provides an active pen, which comprises a flexible circuit board and a plurality of induction coils arranged on the flexible circuit board, wherein the flexible circuit board is arranged in a shell of the active pen in a bending mode, and the arrangement positions of the induction coils cover all relative positions of the shell, so that when a user places the active pen on a wireless charging plate, the active pen can be charged without aligning the active pen with the wireless charging plate. Therefore, the problem that in the prior art, when the active pen is placed on a wireless charging panel, the active pen rolls easily and cannot be aligned accurately, and the charging efficiency of the active pen is affected is solved.
Drawings
FIG. 1 is a schematic diagram of an active pen according to an embodiment of the present invention;
FIG. 2 is a block diagram of an active pen according to an embodiment of the present invention; and
FIG. 3 is a cross-sectional view of an active pen and a wireless charging pad according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a flexible circuit board according to another embodiment of the present invention;
FIG. 5 is a cross-sectional view of an active pen and a wireless charging pad according to another embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of an active pen disposed in an electronic device according to another embodiment of the present invention;
FIG. 7 is a diagram of a wireless system in accordance with an embodiment of the present invention;
FIG. 8 is a diagram of an active pen and a portable electronic device according to an embodiment of the present invention; and
fig. 9 is a flowchart of a method for switching modes according to an embodiment of the invention.
Description of reference numerals:
100. 100A, 100B, 100C active pen;
102. 102B a housing;
104. 104A, 104B flexible circuit boards;
106 a control circuit board;
108 load;
110. 110-1, 110-2, 110-3, 110-4, 110-5, 110-6 and 110-n induction coils;
a 110A outer coil;
110B inner coil;
112 a control chip;
114 a rectifier circuit;
116 a power management circuit;
118 near field communication circuitry;
120. 120-1 a first induction coil;
122. 122-1, 122-2 second induction coils;
124 a main rectifier;
126 pairs of rectifiers;
128 a second magnetic element;
200 a wireless charging pad;
300 an electronic device;
301 a receiving groove;
303 a first magnetic element;
400 a wireless system;
500 a portable electronic device;
600 color discs;
601. 602, 603, 604 sensing tags;
A. b, C nodes;
a BT button;
an SW1 mode switching switch;
SW2 charge mode changeover switch;
s1, S2 coverage;
a TX charging coil;
s100, S102, S104, S106, S108, S110, S112, S114 and S116.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
The use of the same reference numbers in the figures indicates the same or like elements. These examples are intended to illustrate the general principles of the invention and should not be taken in a limiting sense. A detailed description of known functions and configurations will be omitted so as not to obscure the subject matter of the present invention.
It is noted that references to "an" or "one" embodiment of the present invention are not necessarily to the same embodiment, and references to at least one of the embodiments. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of an active pen 100 according to an embodiment of the present invention, and fig. 2 is a block diagram of the active pen 100 according to an embodiment of the present invention. The active pen 100 includes a housing 102, a flexible circuit board 104, a control circuit board 106, and a load 108. The housing 102 can accommodate the flexible circuit board 104 and the control circuit board 106 therein. In this embodiment, the housing 102 is a hexagonal cylinder as shown, but is not limited thereto, and may have other shapes, such as a polygonal cylinder or a cylinder. The flexible circuit board 104 is mounted in the housing 102 in a rolling manner, and the flexible circuit board 104 includes a plurality of induction coils 110 for inducing with an external coil (not shown) to generate an induced current, in this embodiment, the flexible circuit board 104 includes 6 induction coils 110-1, 110-2, 110-3, 110-4, 110-5 and 110-6. The control circuit board 106 can receive the induced current to charge the load 108, and in this embodiment, the load 108 is a rechargeable battery, such as a lithium ion battery (Li-ion), but not limited thereto. The load 108 may thus provide the power required for use of the active pen 100.
The control circuit board 106 is electrically connected to the induction coil 110 of the flexible circuit board 104. The control circuit board 106 includes a control chip 112, a rectifying circuit 114, a power management circuit 116, and a near field communication circuit 118. The control chip 112 is electrically connected to the induction coil 110, the near field communication circuit 118 and the rectifying circuit 114. The control chip 112 is used for monitoring the magnetic induction amount of each induction coil 110 and controlling the operation of the rectifying circuit 114 and the near field communication circuit 118. The rectifying circuit 114 rectifies the induced current generated by the induction coil 110 to output the rectified current to the power management circuit 116. Then, the power management circuit 116 converts the rectified current into a proper voltage to supply to the load 108, so as to stably charge the load 108.
Furthermore, the control circuit board 106 of the active pen 100 may further include a mode switch SW1, and the active pen 100 may further include a button BT disposed on the housing 102. For example, as shown in fig. 1, the button BT may be disposed on the right end of the housing 102, and the button BT is electrically connected to the mode switch SW 1. The mode switch SW1 is electrically connected to one of the induction coils 110. For example, as shown in FIG. 2, the mode switch SW1 is connected to the inductive coil 110-1 and the NFC circuit 118, and the inductive coil 110-1 includes an outer coil 110A and an inner coil 110B. In this case, a node a of the mode switch SW1 is connected to the outer coil 110A, a node B is connected to the inner coil 110B, and a node C is connected to the nfc circuit 118.
The button BT may send an input signal to the mode switch SW1, and the mode switch SW1 determines the operation mode of the active pen 100 according to the input signal, which includes a charging mode and a near field communication mode. For example, when the user presses the button BT, the button BT sends the input signal to the mode switch SW1, so that the operation mode of the active pen 100 is in the nfc mode. At this time, the node B of the mode switch SW1 is connected to the node C, i.e., the inner coil 110B is connected to the nfc circuit 118 through the mode switch SW1, so that the inner coil 110B functions as an inductive coil for communication. Therefore, the control chip 112 can control the nfc circuit 118 and the inner coil 110B to communicate with an external electronic device having nfc functionality, such as a laptop, a smart phone, a tablet computer, etc. having the nfc chip.
Furthermore, when the user presses the button BT again, the mode switch SW1 receives the input signal, which causes the operation mode of the active pen 100 to switch to the charging mode. At this time, the node B of the mode switch SW1 is connected to the node a, i.e., the inner coil 110B is connected to the outer coil 110A through the mode switch SW 1. At this time, the outer coil 110A and the inner coil 110B can be used together as an induction coil of a wireless charging receiver.
Referring to fig. 3, fig. 3 is a cross-sectional view of an active pen 100 and a wireless charging pad 200 according to an embodiment of the invention. In this embodiment, the housing 102 is a hexagonal cylinder and has 6 sides. The flexible circuit board 104 is disposed in the housing 102 in a bending manner, so that the induction coils 110 respectively correspond to and face 6 sides of the hexagonal cylinder. When the active pen 100 is placed on the wireless charging pad 200 and in the charging mode, the control chip 112 monitors that the amount of magnetic induction of the induction coil 110-4 is the maximum, i.e., the charging coil TX closest to the wireless charging pad 200. Therefore, the control chip 112 can transmit the induced current generated by the induction coil 110-4 induced by the charging coil TX to the rectifying circuit 114, the rectifying circuit 114 rectifies the induced current into a rectified current and outputs the rectified current to the power management circuit 116, and the current management circuit 116 converts the rectified current into an appropriate voltage and supplies the appropriate voltage to the load 108, so as to stably charge the load 108. It should be noted that, since the housing 102 is a hexagonal cylinder and each side surface is correspondingly provided with an induction coil 110, when a user places the active pen 100 on the wireless charging board 200 for charging, it is not necessary to align the active pen 100 and the wireless charging board 200, and only the active pen 100 is directly placed on the wireless charging board 200.
Referring to fig. 4, fig. 4 is a schematic cross-sectional view of a flexible circuit board 104A according to another embodiment of the invention. As shown in the figure, in this embodiment, the flexible circuit board 104A includes a plurality of first induction coils 120 and a plurality of second induction coils 122, the first induction coils 120 are disposed on an inner side 1041 of the flexible circuit board 104A, and the second induction coils 122 are disposed on an outer side 1043 of the flexible circuit board 104. It is noted that the position of the first induction coil 120 overlaps the position of the second induction coil 122. For example, the coverage S2 of the leftmost second induction coil 122 in fig. 4 overlaps with the coverage S1 of the two left first induction coils 120.
Referring to fig. 2 and 5, fig. 5 is a cross-sectional view of an active pen 100A and a wireless charging pad 200 according to an embodiment of the invention. In this embodiment, the housing 102 is a cylinder, and the flexible circuit board 104A is bent into a ring shape and disposed in the housing 102. As in the foregoing embodiments, when the user wants to place the active pen 100A on the wireless charging pad 200 for charging, the active pen 100A and the wireless charging pad 200 do not need to be aligned, and the active pen 100A can be directly placed on the wireless charging pad 200. As shown in fig. 5, the lowest first induction coil 120-1 among the first induction coil 120 and the second induction coil 122 is induced by the charging coil TX to generate the maximum magnetic induction, so the control chip 112 transmits the induced current generated by the induction coil 120-1 induced by the charging coil TX to the rectifying circuit 114, the rectifying circuit 114 rectifies the induced current into a rectified current and outputs the rectified current to the power management circuit 116, and the current power management circuit 116 converts the rectified current into an appropriate voltage and supplies the appropriate voltage to the load 108, thereby stably charging the load 108.
In addition, a charging mode switch SW2 (shown in fig. 1) may be disposed on the housing 102 for switching the charging mode of the active pen 100A, which includes a normal charging mode and a fast charging mode. The rectifier circuit 114 may include a primary rectifier 124 and a secondary rectifier 126. If the charging mode switch SW2 is not pressed by the user, and the active pen 100A is in the normal charging mode, the control chip 112 only activates the main rectifier 124 to receive a first induced current generated by the first induction coil 120-1 and output a first rectified current, and then the power management circuit 116 receives the first rectified current rectified by the main rectifier 124 to charge the load 108. If the charging mode switch SW2 is pressed by the user, the active pen 100A is in the fast charging mode and the charging mode switch SW2 transmits a switching signal to the control chip 112, the control chip 112 activates the secondary rectifier 126 according to the switching signal. At this time, the main rectifier 124 receives the first induced current generated by the first induction coil 120-1 to output a first rectified current, and the sub-rectifier 126 receives a second induced current and a third induced current generated by the second induction coils 122-1 and 122-2 at two sides of the first induction coil 120-1 to output a second rectified current and a third rectified current. The power management circuit 116 receives the first rectified current, the second rectified current and the third rectified current rectified by the primary rectifier 124 and the secondary rectifier 126, and then converts the first rectified current, the second rectified current and the third rectified current into appropriate voltages to be supplied to the load 108 for charging, so as to achieve the purpose of fast charging. Therefore, the user can select the required charging mode according to the requirement of the user.
Referring to fig. 6, fig. 6 is a cross-sectional view illustrating an active pen 100B disposed in an electronic device 300 according to another embodiment of the invention. In this embodiment, the active pen 100B is inserted into a receiving slot 301 of the electronic device 300. Two charging coils TX and two first magnetic elements 303 are disposed around the receiving slot 301. The inner side of the casing 102B of the active pen 100B is correspondingly provided with two second magnetic elements 128 for generating magnetic attraction with the two first magnetic elements 303, so that the active pen 100B can be positioned when inserted into the receiving slot 301. The active pen 100B includes two induction coils 110 disposed inside the flexible circuit board 104B, and when the active pen 100B is inserted into the receiving slot 301 for positioning, the position pairs of the two induction coils 110 are located at two charging coils TX, so as to achieve the purpose that the two charging coils TX induce the two induction coils 110 to generate an induced current to charge the active pen 100B. The first magnetic element 303 can be one of an N-type magnet or an S-type magnet, and the second magnetic element 128 is the other of an N-type magnet or an S-type magnet.
Referring to fig. 7, fig. 7 is a diagram illustrating a wireless system 400 according to an embodiment of the invention. The wireless system 400 may include a portable electronic device 500, a color wheel 600, and an active pen 100C. The active pen 100C may have an inductive coil 110-1, near field communication circuitry 118, and a control chip 112 as shown in FIG. 2, and the active pen 100C operates in a near field communication mode. The control chip 112 may be used to control the near field communication circuit 118 and the induction coil 110-1 to wirelessly communicate with a near field communication chip (not shown) in the portable electronic device 500.
The color wheel 600 includes a plurality of inductive tags, each of which may be formed by a near field communication coil. In this embodiment, the color wheel 600 includes sensing tags 601, 602, 603, and 604, and each sensing tag has an identification data, each identification data is different from each other and corresponds to a color. For example, sense label 601 corresponds to red, sense label 602 corresponds to green, sense label 603 corresponds to blue, and sense label 604 corresponds to white. When the user wants to write a red word on the portable electronic device 500, the active pen 100C may first approach the inductive tag 601 to sense, and the control chip 112 may sense the inductive tag 601 through the nfc circuit 118 and the induction coil 110-1 to obtain the identification data corresponding to the red color. The control chip 112 then transmits the identification data to the nfc chip of the portable electronic device 500 through the nfc circuit 118 and the induction coil 110-1, and the nfc chip then sends the identification data to a central processing unit (not shown) of the portable electronic device 500, so as to execute corresponding software and control a display screen of the portable electronic device 500, such that a user can use red handwriting when performing touch input on the display screen of the portable electronic device 500 by using the active pen 100C.
Referring to fig. 8, fig. 8 is a schematic diagram of an active pen 100C and a portable electronic device 500 according to an embodiment of the invention. In this embodiment, the control chip 112 of the active pen 100C stores therein a business card data of the user. When the active pen 100C is operated in the nfc mode and the user brings the active pen 100C close to the portable electronic device 500, the control chip 112 transmits the business card data to the portable electronic device 500 through the nfc circuit 118 and the induction coil 110-1, and the cpu of the portable electronic device 500 executes corresponding software to display the business card data on the display screen of the portable electronic device 500. The user can then use the active pen 100C to perform touch control on the display screen to perform functions such as signature, correction or deletion of the business card data.
Referring to fig. 2 and fig. 9, fig. 9 is a flowchart of a method for switching modes according to an embodiment of the invention. In step S100, an operation mode of the active pen is determined according to an input signal through a mode switch SW 1. When the user presses the button BT, the button BT generates the input signal to the mode switch SW1, and when receiving the input signal, the mode switch SW1 connects the nfc circuit 118 and the inner coil 110B, so that the active pen operates a nfc mode of the operation modes. When the user does not press the button BT and the mode switch SW1 does not receive the input signal, the mode switch SW1 connects the inner coil 110B to the outer coil 110A, so that the active pen is in a charging mode of the operation modes. In step S102, when the active pen is in the nfc mode, the induction coil 110-1 induces with an external communication coil (e.g., with a communication coil inside the portable electronic device 500 in fig. 7) to establish a communication path. In step S104, the control chip 112 of the active pen communicates with an electronic device (such as the portable electronic device 500) via the communication path.
In step S106, when the active pen is in the charging mode, the external charging coil (e.g. the aforementioned charging coil TX) is induced by one of the induction coils 110. In step S108, the control chip 112 activates the main rectifier 124 of the rectifying circuit 114, and the main rectifier 124 receives a first induced current of one of the induction coils 110 and outputs a first rectified current. In step S110, the control chip 112 determines whether the active pen is in the fast charging mode or the normal charging mode according to a switching signal generated by the charging mode switch SW 2. In step S112, when the control chip 112 determines that the active pen is in the normal charging mode, the power management circuit 116 only receives the first rectified current rectified by the main rectifier 124 to charge the load 108.
In step S114, when the control chip 112 determines that the active pen is in the fast charging mode, the control chip 112 further activates 114 a secondary rectifier 126 of the rectifying circuit, wherein the secondary rectifier 126 receives a second induced current and a third induced current of the adjacent two of the induction coils 110 and outputs a second rectified current and a third rectified current. In step S116, the power management circuit 116 receives the first rectified current, the second rectified current and the third rectified current rectified by the primary rectifier 124 and the secondary rectifier 126 to charge a load 108.
Compared with the prior art, the active pen provided by the invention comprises the flexible circuit board and the plurality of induction coils arranged on the flexible circuit board, wherein the flexible circuit board is arranged in the shell of the active pen in a bending mode, and the arrangement positions of the induction coils cover all relative positions of the shell, so that when a user places the active pen on a wireless charging plate, the active pen can be charged without aligning the active pen with the wireless charging plate. Therefore, the problem that in the prior art, when the active pen is placed on a wireless charging panel, the active pen rolls easily and cannot be aligned accurately, and the charging efficiency of the active pen is affected is solved.
It will be understood that elements and features recited in the claims may be combined in different ways to produce new claims and also fall within the scope of the invention. Thus, whereas the dependent claims depend only from a single independent claim or from a dependent claim, it will be appreciated that those dependent claims may alternatively depend from any preceding or subsequent claim, and that such novel combinations are to be understood as forming part of the present specification.
While the invention has been described by way of example and in terms of preferred embodiments, it is to be understood that the invention is not so limited. Various substitutions and modifications may be made by one of ordinary skill in the art without departing from the scope and spirit of the invention. Accordingly, the scope of the invention is to be defined and protected by the following claims and their equivalents.
Claims (11)
1. An active pen, comprising:
a housing;
the flexible circuit board is arranged in the shell and comprises a plurality of induction coils, at least one of the induction coils is induced with an external coil to generate an induction current, and one of the induction coils comprises an external coil and an internal coil;
the rectifying circuit receives the induction current, rectifies the induction current and provides a rectified current to a load;
a near field communication circuit; and
a mode switch connected to the outer coil, the inner coil and the near field communication circuit, the mode switch determining an operation mode of the active pen according to an input signal, the operation mode including a charging mode and a near field communication mode;
when the active pen is in the near field communication mode, the inner coil is disconnected with the outer coil through the mode selector switch and is connected to the near field communication circuit so as to communicate with an external electronic device, and when the active pen is in the charging mode, the inner coil is connected to the outer coil through the mode selector switch.
2. The active pen of claim 1, wherein the housing is a corner post, and the flexible printed circuit board is disposed in the housing with a bend such that the induction coils respectively correspond to a plurality of sides of the corner post.
3. The active pen according to claim 2, wherein the housing is a cylinder, the flexible circuit board is disposed in the housing in a ring shape, the induction coil comprises a plurality of first induction coils disposed on an inner side of the flexible circuit board and a plurality of second induction coils disposed on an outer side of the flexible circuit board, and the position of the first induction coil overlaps the position of the second induction coil.
4. The active pen of claim 1, further comprising a power management circuit and a control chip, wherein the housing is provided with a charging mode switch, and the rectifying circuit comprises a main rectifier and a sub-rectifier, when the charging mode switch is not pressed, the control chip only activates the main rectifier to receive a first induced current of one of the induction coils and output a first rectified current, the active pen is in a normal charging mode, the power management circuit receives the first rectified current rectified by the main rectifier to charge the load, and when the charging mode switch is pressed, the active pen is in a fast charging mode, the charging mode switch transmits a switching signal to the control chip, and the control chip activates the sub-rectifier according to the switching signal, the power management circuit receives the first rectified current, the second rectified current and the third rectified current which are rectified by the main rectifier and the auxiliary rectifier, and charges the load.
5. The active pen according to claim 1, wherein the housing further comprises at least one first magnetic element, and when the active pen is disposed on or in an electronic device, the at least one first magnetic element and the at least one second magnetic element of the electronic device attract each other, so that the induction coils are respectively aligned with a plurality of charging coils of the electronic device.
6. A method of switching modes for an active pen comprising a plurality of inductive coils and a near field communication circuit, one of the inductive coils comprising an outer coil and an inner coil, the method comprising:
determining an operation mode of the active pen according to an input signal through a mode switch;
when the mode switch receives the input signal, the inner coil is disconnected with the outer coil through the mode switch and is connected to the near field communication circuit, so that the active pen is in a near field communication mode in the operation mode; and
when the mode switch does not receive the input signal, the mode switch connects the inner coil to the outer coil, so that the active pen is in a charging mode in the operation mode.
7. The method of claim 6, wherein the active pen further comprises a rectifying circuit, a control chip, a power management circuit, and a load, the method further comprising:
when the active pen is in the charging mode, one of the induction coils is used for inducing with an external charging coil;
starting a main rectifier of the rectifying circuit through the control chip, wherein the main rectifier receives a first induction current of an induction coil which is induced by an external charging coil of the induction coil and outputs a first rectified current;
judging whether the active pen is in a fast charging mode or a normal charging mode through the control chip; and
when the control chip judges that the active pen is in the normal charging mode, the power management circuit only receives the first rectified current rectified by the main rectifier so as to charge the load.
8. The method of switching modes of claim 7, further comprising:
when the control chip judges that the active pen is in the fast charging mode, the control chip additionally enables a secondary rectifier of the rectifying circuit, wherein the secondary rectifier receives a second induction current and a third induction current of two adjacent induction coils of the induction coil which is inducted by an external charging coil and outputs a second rectified current and a third rectified current; and
the first rectified current, the second rectified current and the third rectified current rectified by the main rectifier and the auxiliary rectifier are received through the power management circuit, so that a load is charged.
9. The method of switching modes of claim 6, further comprising:
when the active pen is in the near field communication mode, one of the induction coils induces with an external communication coil so as to establish a communication path; and
the active pen further comprises a control chip, wherein the control chip is communicated with an external electronic device through the communication path, and the electronic device comprises the communication coil.
10. The method of claim 7, wherein the step of determining whether the active pen is in the fast charging mode or the normal charging mode via the control chip further comprises:
the control chip judges whether the active pen is in the fast charging mode or the normal charging mode according to a switching signal, wherein the switching signal is generated by a charging mode switch, and the charging mode switch is arranged on the active pen.
11. A wireless system, comprising:
the active pen of claim 1, comprising:
an induction coil;
a near field communication circuit; and
the control chip is used for controlling the near field communication circuit and the induction coil to carry out wireless communication with an electronic device; and
a color wheel, comprising:
the induction tags are provided with identification data, and the identification data are different from each other and correspond to a color;
the control chip controls the near field communication circuit and the induction coil to induce one of the induction tags so as to acquire the identification data of the one of the induction tags, and the control chip transmits the identification data to the electronic device through the near field communication circuit and the induction coil.
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| CN201610297002.0A CN107346906B (en) | 2016-05-06 | 2016-05-06 | Wireless system, active pen and mode switching method |
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| CN107346906B true CN107346906B (en) | 2020-03-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109828682A (en) * | 2017-11-23 | 2019-05-31 | 深圳市优笔触控科技有限公司 | The electromagnetic hand-writing pen that can be write on paper |
| CN109638436B (en) * | 2018-11-30 | 2021-10-01 | 珠海米团科技有限公司 | NFC point-surface induction type antenna, circuit and equipment |
| CN112162649B (en) * | 2020-10-09 | 2022-11-15 | Oppo（重庆）智能科技有限公司 | Active pen and control method thereof, electronic device and control method thereof |
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| CN107346906A (en) | 2017-11-14 |
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