WO2020029251A1

WO2020029251A1 - Handwriting sensing system and charging device thereof, and handwriting board

Info

Publication number: WO2020029251A1
Application number: PCT/CN2018/099973
Authority: WO
Inventors: 陈增源
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-02-13
Also published as: CN112640245A

Abstract

A charging device (40), the charging device (40) being provided in a handwriting board (20). The charging device (40) comprises a first connection port (41) and a second connection port (42), the first connection port (41) being electrically connected to an external power supply and to a rechargeable battery (22) of the handwriting board (20). The second connection port (42) is electrically connected to the first connection port (41) and a stylus (30), the stylus (30) matching the handwriting board (20). The second connection port (42) is used for outputting a charging voltage to a rechargeable battery (31) of the stylus (30). Further provided are a handwriting sensing system (100) and a handwriting board (20).

Description

Handwriting induction system, charging device thereof, and tablet

Technical field

The present application relates to the technical field of charging circuits, and in particular, to a handwriting sensing system, a charging device thereof, and a tablet.

Background technique

The existing electronic tablet has a built-in rechargeable battery and uses an independent charging circuit for charging, and the stylus used with it is powered by a dry battery or a rechargeable battery. However, for a handwriting sensing system having a stylus using a dry battery, there is a disadvantage that the battery needs to be frequently replaced. For a handwriting sensing system with a stylus using a rechargeable battery, two power adapters are needed to charge the stylus and the stylus respectively, which has the disadvantage of being inconvenient to charge and carrying the power adapter.

Summary of the invention

The present application provides a handwriting induction system, a charging device and a handwriting pad thereof, which can simultaneously charge the handwriting pad and the stylus of the handwriting induction system through a power adapter, which can facilitate the charging of the handwriting induction system .

In a first aspect, the present application provides a charging device disposed in a tablet. The charging device includes:

The first connection interface is respectively electrically connected to an external power source and a rechargeable battery of the tablet; and

A second connection interface, which is electrically connected to the first connection interface and a stylus, respectively, wherein the stylus is used in combination with the stylus;

The second connection interface is used to output a charging voltage to a rechargeable battery of the stylus.

In a second aspect, the present application provides a tablet including a casing, a rechargeable battery provided inside the casing, and the charging device described in the first aspect.

In a third aspect, the present application provides a handwriting sensing system, including a stylus pen and the handwriting pad described in the second aspect.

The charging device provided in this application integrates the charging structure of the stylus board and the stylus pen, which not only solves the disadvantages of the traditional stylus pen that needs to be powered by a dry battery, but also can charge the stylus board and the stylus pen of the handwriting induction system at the same time, reducing handwriting. The number of power adapters required for the induction system also makes charging and accessories of the handwriting induction system easier and more convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a handwriting sensing system according to a first embodiment of the present application. The handwriting sensing system includes a tablet, a stylus, and a charging device.

FIG. 2 is a schematic structural diagram of a charging device according to a first embodiment of the present application.

FIG. 3 is a schematic structural diagram of a charging device according to a second embodiment of the present application.

FIG. 4 is a schematic structural diagram of a tablet according to a second embodiment of the present application.

FIG. 5 is a schematic structural diagram of a tablet according to a third embodiment of the present application.

FIG. 6 is a schematic structural diagram of a charging device according to a third embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the implementations in this application, all other implementations obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

Please refer to FIG. 1, which is a schematic diagram of a handwriting sensing system 100 according to a first embodiment of the present application. The handwriting sensing system 100 may include a tablet 20, a stylus 30, and a charging device 40. The stylus 30 is used in combination with the stylus 20, and the working principle of the stylus 20 and the stylus 30 can refer to related technologies. Since this part is not the focus of the invention of this application, it is not described here. Detailed introduction.

Please refer to FIG. 2 together. The tablet 20 includes at least a housing 21 and a first rechargeable battery 22, a main board 23, and a tablet load 24 provided inside the housing 21, wherein the first rechargeable battery 22 It is electrically connected to the main board 23 and the tablet load 24 respectively. The first rechargeable battery 22 is used to supply power to the tablet load 24 so that the tablet 20 can work.

The stylus pen 30 includes a second rechargeable battery 31 and a stylus pen load 32 electrically connected to the second rechargeable battery 31. The second rechargeable battery 31 is used to supply power to the stylus pen load 32 so that the stylus pen load 32 The stylus 30 is capable of working.

In this embodiment, the charging device 40 is disposed on the main board 23 and is used to charge the first rechargeable battery 22 and the second rechargeable battery 31 respectively.

In this embodiment, the charging device 40 includes at least a first connection interface 41 and a second connection interface 42, wherein the first connection interface 41 is electrically connected to an external power source 50 and the first rechargeable battery 22, respectively. The second connection interface 42 is electrically connected to the first connection interface 41 and the stylus 30, respectively. The first connection interface 41 is configured to receive a charging voltage provided by the external power source, and the second connection interface is configured to output a charging voltage to a rechargeable battery of the stylus.

In this embodiment, one end of the stylus pen 30 is provided with a third connection interface 33 electrically connected to the second rechargeable battery 31, and the third connection interface 33 is also electrically connected to the second connection interface 42. Therefore, an electrical connection between the second connection interface 42 and the stylus 30 is achieved.

In this embodiment, when the first connection interface 41 is connected to the external power source 50 and receives power from the external power source 50, the first connection interface 41 uses a charging voltage provided by the external power source to The first rechargeable battery 22 is charged, the second connection interface 42 obtains a charging voltage provided by the external power source through the first connection interface 41, and provides the first connection point of the stylus 30 through the third connection interface 33. The two rechargeable batteries 31 are charged.

In this embodiment, as shown in FIG. 1, the first connection interface 41 may be a voltage input interface provided on the housing 21 of the tablet 20, such as a 5V USB interface, wherein the USB interface It may include, but is not limited to, a Micro USB interface, a Type-c interface, a Type-b interface, and a 30-pin interface. The first connection interface 41 can be electrically connected to the external power source 50 through an external power adapter (not shown).

The second connection interface 42 may be a voltage output interface provided on the housing 21 of the tablet 20. In this embodiment, the second connection interface 42 is electrically connected to the stylus 30 separately. As shown in FIG. 1, the second connection interface 42 is a receiving seat disposed on the housing 21 of the tablet 20, and is configured to receive the stylus 30. For example, the second connection interface 42 may be a female connector of a charging connector, and accordingly, the third connection interface 33 may be a male connector of a charging connector that cooperates with the female connector of the charging connector.

In one embodiment, the second connection interface 42 may include a base body and a first metal contact provided on an inner wall of the base body. Accordingly, the third connection interface 33 of the stylus 30 may be It is a second metal contact provided on one end of the stylus 30. As such, when the one end of the stylus pen 30 is inserted into the base of the second connection interface 42, the first metal contact of the second connection interface 42 and the second metal contact of the stylus 30 The electrical connection is made, so that the second connection interface 42 can be electrically connected to the stylus pen 30, so that the charging device 40 can charge the second rechargeable battery 31 of the stylus pen 30.

Optionally, in another implementation manner, the second connection interface 42 may include a base body and a first induction coil disposed in the base body. Accordingly, the third connection of the stylus 30 The interface 33 may be a second induction coil provided at one end of the stylus 30. In this way, when the one end of the stylus pen 30 is inserted into the base of the second connection interface 42, the first induction coil of the second connection interface 42 passes through the second induction coil of the stylus pen 30. Electrical connection is performed by electromagnetic induction, so that the second connection interface 42 can be electrically connected to the stylus pen 30, so that the charging device 40 can charge the second rechargeable battery 31 of the stylus pen 30.

Optionally, in other embodiments, the second connection interface 42 may also be electrically connected to the stylus pen 30 in a wired manner.

The charging device 40 provided in this application integrates the charging structure of the stylus board and the stylus pen, which not only solves the disadvantages of the traditional stylus pen that needs to be powered by a dry battery, but also can charge the stylus board and the stylus pen of the handwriting induction system at the same time, reducing The number of power adapters required by the handwriting sensing system also makes charging and accessories of the handwriting sensing system easier and more convenient.

Please refer to FIG. 2 again, the charging device 40 may further include a conversion circuit 43 and a control module 44, wherein the conversion circuit 43 is electrically connected between the first rechargeable battery 22 and the second connection interface 42, The conversion circuit 43 is configured to convert an output voltage of the first rechargeable battery 22 into a charging voltage for charging the second rechargeable battery 31. In this embodiment, the conversion circuit 43 may specifically be a boosting circuit for boosting the output voltage of the first rechargeable battery 22 of the tablet 20 to output a voltage suitable for the second The voltage charged by the rechargeable battery 31 is, for example, 5V.

In this embodiment, the control module 44 is electrically connected to the conversion circuit 43 and the first connection interface 41. The control module 44 is configured to detect that the first connection interface 41 has not received the When the external power source 50 supplies power, the conversion circuit 43 is enabled, and the conversion circuit 43 is controlled to convert the output voltage of the first rechargeable battery 22 of the tablet 20 into a voltage for charging the second rechargeable battery 31. The enabling is that the control module 44 controls the operation of the conversion circuit 43 and makes the first rechargeable battery 22 and the second connection interface 42 electrically connected.

Optionally, in another implementation manner, the control module 44 is further electrically connected to the second connection interface, and the control module 44 is configured to detect that the first connection interface 41 has not received the When power is supplied from an external power source 50 and the second connection interface 42 is detected to be electrically connected to the third connection interface 33 of the stylus 30, the conversion circuit 43 is enabled, and the conversion circuit 43 is controlled to write the handwriting The output voltage of the first rechargeable battery 22 of the board 20 is converted into a voltage for charging the second rechargeable battery 31, so that the charging of the stylus pen 30 is more intelligent.

In this embodiment, the control module 44 is further configured to disable the conversion circuit 43 and control the conversion circuit 43 to stop when detecting that the first connection interface 41 receives power from the external power source 50. The output voltage of the first rechargeable battery 22 of the tablet 20 is converted into a voltage for charging the second rechargeable battery 31. The disabling is that the control module 44 controls the conversion circuit 43 to stop working and disconnects the electrical connection between the first rechargeable battery 22 and the second connection interface 42.

As such, when an external power source 50 is present, the charging device 40 may preferentially use the input voltage of the external power source 50 to charge the second rechargeable battery 31 to improve the charging efficiency of the second rechargeable battery 31. When there is no external power source 50, the output voltage of the first rechargeable battery 22 of the tablet 20 is used to charge the second rechargeable battery 31, so that it is possible to avoid having sufficient power in the external power source 50 or the tablet 20 However, if the power adapter provided with the stylus pen 30 is not carried, the phenomenon that the second rechargeable battery 31 of the stylus pen 30 cannot be charged and affects the continued use of the entire handwriting sensing system 100 occurs. By using the charging device 40 provided in this application, the stylus pen 30 can be flexibly charged, so as to adapt to the requirements of various use situations, thereby improving the user experience.

In this embodiment, the control module 44 may be a single-chip microcomputer or a microprocessor, and may include a first detection port and a second detection port. The charging device 40 may further include a first detection module and a second detection module. The first detection module is electrically connected to the first detection port. The first detection module may be configured to detect the first connection interface 41. Whether to receive power from the external power source 50 and generate a corresponding first detection signal according to a detection situation. The second detection module is electrically connected to the second detection port, and the second detection module may be configured to detect whether the second connection interface 42 is electrically connected to the third connection interface 33 of the stylus 30, and according to The detection condition generates a corresponding second detection signal. The control module 44 may receive the first detection signal through the first detection port and the second detection signal through the second detection port, so that the control module 44 may The detection signal makes a corresponding control decision on the working state of the conversion circuit 43.

In this embodiment, the charging device 40 further includes a first charging circuit 45. The first charging circuit 45 is electrically connected between the first connection interface 41 and the first rechargeable battery 22. The first charging circuit 45 receives a charging voltage provided by the first connection interface 41 and supplies the charging voltage to The first rechargeable battery 22 is charged.

In one embodiment, as shown in FIG. 2, the stylus pen 30 may further include a second charging circuit 34. The second charging circuit 34 is electrically connected between the third connection interface 33 and the second rechargeable battery 31. The second charging circuit 34 receives the signals through the third connection interface 33 and the second connection interface 42. The charging voltage provided by the external power source 50, or the charging voltage provided by the first rechargeable battery 22 is received through the third connection interface 33, the second connection interface 42 and the conversion circuit 43 and is supplied to the The second rechargeable battery 31 is charged.

Optionally, in another embodiment, as shown in FIG. 3, the charging device 40 ′ may further include the second charging circuit 34, and an input terminal of the second charging circuit 34 is respectively connected to the first The interface 41 and the conversion circuit 43 are electrically connected, and the output terminal of the second charging circuit 34 is electrically connected to the second connection interface 42. The second connection interface 42 may include a base and a first metal contact provided on an inner wall of the base. Accordingly, the third connection interface 33 of the stylus 30 may be provided on the stylus. 30 second metal contact at one end. As such, when the one end of the stylus pen 30 is inserted into the base of the second connection interface 42, the first metal contact of the second connection interface 42 and the second metal contact of the stylus 30 Point electrical connection. The second charging circuit 34 is configured to receive the charging voltage provided by the first connection interface 41 or the conversion circuit 43 and charge the second through the second connection interface 42 and the third connection interface 33. The battery 31 is charged. In this way, the second charging circuit 34 for charging the second rechargeable battery 31 of the stylus pen 30 can be set on the handwriting board 20, so that the stylus pen 30 has a simpler structure and an overall weight. It is lighter and easier for users to use, which can improve the user experience.

Please refer to FIG. 1 again, the housing 21 may further be provided with a fixing base 25 for detachably fixing the stylus pen 30 so that the stylus pen 30 is not used when the stylus pen 30 is not used. The stylus pen 30 is stored on the stylus board 20 to avoid the situation where the stylus pen 30 is stored or carried separately from the stylus board 20 and the stylus pen 30 is lost.

In one embodiment, the opening of the fixing base 25 can face and face the opening of the second connection interface 42, and the distance between the fixing base 25 and the second connection interface 42 is greater than the distance between the fixing base 25 and the second connection interface 42. The length of the stylus 30. In this way, when the stylus pen 30 is stored in the fixing base 25 or when the stylus pen 30 is inserted into the second connection interface 42 for charging, the stylus pen 30 can share part of the storage space, so The space occupied by the stylus 30 during storage and charging is reduced.

Optionally, in another implementation manner, the opening of the fixing base 25 may not face or face the opening of the second connection interface 42. For example, the fixing base 25 may face the second connection interface. The connection interface 42 has two openings facing the same direction, or the fixing base 25 and the second connection interface 42 can be arranged side by side, and the openings of the two are facing the same direction and are parallel to each other.

In one embodiment, as shown in FIG. 4, the housing 21 of the tablet 20 ′ may further be provided with a receiving slot 26, which is used to receive a stylus 30 used with the tablet 20. The second connection interface 42 of the charging device 40 may be disposed at one end in the receiving slot 26, and the fixing seat 25 may be disposed at the other end in the receiving slot 26. By arranging the stylus pen 30, the second connection interface 42 and the fixing base 25 connecting or fixing the stylus pen 30 in the receiving groove 26 of the housing 21, the stylus pen 30, the first The two connection interfaces 42 and the fixing seat 25 protrude from the surface of the casing 21 and are damaged.

In another embodiment, as shown in FIG. 5, the housing 21 of the tablet 20 ″ may include a main body 211 and a cover 212, and the fixing base 25 and the second connection interface 42 may be disposed on the main body. 211 or cover 212.

In some embodiments, when the fixing base 25 and the second connection interface 42 are simultaneously provided on the body 211, the body 211 may further be provided with a receiving slot 26 as shown in FIG. 4. Optionally, when the fixing base 25 and the second connection interface 42 are provided on the body 211 at the same time, the cover 212 may further be provided with the fixing base 25 and the second connection. When the main body 211 and the cover 212 are closed, the fixing groove 25 and the second connection interface 42 are received in the receiving grooves of the interface 42.

Optionally, in other embodiments, when the fixing seat 25 and the second connection interface 42 are simultaneously provided on the cover body 212, the cover body 212 may further be provided as shown in FIG. 4的槽槽 26。 The receiving slot 26. Optionally, when the fixing base 25 and the second connection interface 42 are provided on the cover 212 at the same time, the body 211 may further be provided with the fixing base 25 and the second connection. When the main body 211 and the cover 212 are closed, the fixing groove 25 and the second connection interface 42 are received in the receiving grooves of the interface 42.

Optionally, in other embodiments, as shown in FIG. 6, the charging device 40 ″ may further include a switching element 46. The switching element 46 may be disposed on the housing 21. A connection of the switching element 46 is provided. Terminals are electrically connected to the second connection interface 42, and the other connection ends of the switching element 46 are electrically connected to the first connection interface 41 and the conversion circuit 43, respectively. The second connection interface 42 is in the When the switching element 46 is turned on, it can receive power from the first connection interface 41 or the conversion circuit 43.

When the switching element 46 is turned off, the second connection interface 42 will not receive any power. In this way, the second connection interface 42 can serve as a charging connection base for the stylus 30 to write to the handwriting. Charging the pen 30 can also replace the fixing base 25 of the stylus pen 30 to fix the stylus pen 30, so that the fixing base 25 can be omitted to reduce the space required to receive the stylus pen 30. The switch element 46 may be a switch such as a push switch or a toggle switch. During actual use, the on and off of the switching element 46 can be controlled by a manual operation of a user.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not restrictive. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technology of the present application Modifications or equivalent replacements of the schemes should not depart from the spirit and scope of the technical schemes of this application.

Claims

A charging device is provided in a tablet. The charging device includes:

The first connection interface is respectively electrically connected to an external power source and a rechargeable battery of the tablet; and

A second connection interface, which is electrically connected to the first connection interface and a stylus, respectively, wherein the stylus is used in combination with the stylus;

The second connection interface is used to output a charging voltage to a rechargeable battery of the stylus.
The charging device according to claim 1, wherein when the first connection interface is connected to the external power source and receives power from the external power source, the second connection interface passes the first connection The interface obtains a charging voltage provided by the external power source and charges a rechargeable battery of the stylus.
The charging device according to claim 2, wherein the charging device further comprises:

A conversion circuit electrically connected to the rechargeable battery of the tablet and the second connection interface, for converting an output voltage of the rechargeable battery of the tablet to a charging voltage for charging the rechargeable battery of the stylus;

And a control module, which is electrically connected to the conversion circuit and the first connection interface, and is configured to enable the conversion circuit and control the detection circuit when it is detected that the first connection interface has not received power from the external power source. The conversion circuit converts the output voltage of the rechargeable battery of the tablet into a voltage to charge the rechargeable battery of the stylus.
The charging device according to claim 3, wherein the control module is further configured to disable the conversion circuit and control the conversion circuit when the first connection interface receives power from the external power supply. Stop converting the output voltage of the rechargeable battery of the tablet to a voltage to charge the rechargeable battery of the stylus.
The charging device according to any one of claims 1-4, wherein the first connection interface is a voltage input interface provided on a housing of the tablet.
The charging device according to claim 1 or 2, wherein the second connection interface is a voltage output interface provided on a housing of the tablet.
The charging device according to claim 6, wherein the second connection interface is detachably electrically connected to the stylus.
The charging device according to claim 7, wherein the second connection interface is a receiving seat provided on a housing of the tablet for receiving the stylus.
The charging device according to claim 8, wherein the second connection interface comprises a base body and a first metal contact provided on an inner wall of the base body, and one end of the stylus pen is provided with a second metal contact. Point, when the one end of the stylus is inserted into the base of the second connection interface, the first metal contact of the second connection interface is electrically connected with the second metal contact on the stylus To achieve the electrical connection between the second connection interface and the stylus; or

The second connection interface includes a base body and a first induction coil disposed in the body. One end of the stylus pen is provided with a second induction coil. When the one end of the stylus pen is inserted into the second When the socket of the interface is connected, the first induction coil of the second connection interface and the second induction coil of the stylus are electrically connected by an electromagnetic induction method, thereby realizing the second connection interface and the stylus. Electrical connection.
The charging device according to claim 4, wherein the charging device further comprises a first charging circuit, the first charging circuit is electrically connected to the first connection interface and a rechargeable battery of the tablet, and Receiving a charging voltage provided by the first connection interface and charging a rechargeable battery of the tablet;
The charging device according to claim 4, wherein the charging device further comprises a second charging circuit, and an input terminal of the second charging circuit is electrically connected to the first connection interface and the conversion circuit, respectively, The output terminal of the second charging circuit is electrically connected to the second connection interface. The second charging circuit is configured to receive a charging voltage provided by the first connection interface or the conversion circuit and pass the second connection. The interface charges a rechargeable battery of the stylus.
A tablet includes a casing, a rechargeable battery provided inside the casing, and the charging device according to any one of claims 1-11.
The tablet according to claim 12, wherein the housing is further provided with a receiving slot, and the receiving slot is used for receiving a stylus pen used in conjunction with the tablet.
The tablet of claim 13, wherein the second connection interface of the charging device is disposed at one end in the receiving slot.
The tablet according to claim 12, wherein the housing is further provided with a fixing base, and the fixing base is used for detachably fixing the stylus.
The tablet according to claim 12, wherein the tablet further comprises a switching element, the switching element is disposed on the housing, and a connecting end of the switching element is electrically connected to the second A connection interface, and the other connection ends of the switching elements are respectively electrically connected to the first connection interface;

The second connection interface receives power from the first connection interface when the switching element is turned on.
A handwriting sensing system includes a stylus pen and the handwriting tablet according to any one of claims 12-16.