WO2020042145A1

WO2020042145A1 - Handwriting sensing system, and handwriting input control device and method therefor

Info

Publication number: WO2020042145A1
Application number: PCT/CN2018/103508
Authority: WO
Inventors: 杨必华; 刘兴慧
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2020-03-05
Also published as: CN112654958A

Abstract

A handwriting sensing system (100), and a handwriting input control device (40) and method therefor. The handwriting sensing system (100) further comprises a stylus pen (20) and a handwriting pad (30); the handwriting input control device (40) comprises an azimuth detection module (41), an inclination angle detection module (42), and an adjustment module (43). The azimuth detection module (41) is used for detecting an azimuth angle of the stylus pen (20) with respect to the handwriting pad (30) during a writing process. The inclination angle detection module (42) is used for detecting an inclination angle of the stylus pen (20) with respect to the handwriting board (30) during the writing process. The adjustment module (43) is used for adjusting the writing of the stylus pen (20) according to at least one of the azimuth angle and the inclination angle.

Description

Handwriting induction system and handwriting input control device and method thereof

Technical field

The present application relates to the technical field of handwriting input control, and in particular, to a handwriting induction system and a handwriting input control device and method thereof.

Background technique

In a handwriting sensing system with a stylus and a stylus, the user can perform more delicate handwriting input operations on the stylus through the stylus. In actual application, how to present users with more realistic writing handwriting, so that the writing effect of the stylus pen is closer to the real writing pen, in order to bring a more realistic user experience, has become the main research direction of R & D personnel.

Summary of the Invention

In view of this, the present application provides a handwriting induction system and a handwriting input control device and method thereof, which can implement a simple gesture and algorithm to detect a writing gesture, and implement handwriting restoration when the stylus is writing according to the detected writing gesture. To give users a more realistic experience.

In a first aspect, the present application provides a handwriting input control device, which is applied to a handwriting sensing system, where the handwriting sensing system includes a stylus pen and a handwriting pad. The handwriting input control device includes:

An azimuth detection module, configured to detect an azimuth included angle of the stylus relative to the tablet during writing;

An inclination angle detection module for detecting an inclination angle of the stylus with respect to the tablet during writing; and

An adjustment module is configured to adjust writing handwriting of the stylus according to at least one of the azimuth included angle and the inclined included angle.

In a second aspect, the present application provides a handwriting input control method, including:

Detecting the azimuth angle of the stylus relative to the tablet during the writing process;

Detecting an inclination angle of the stylus with respect to the tablet during writing; and

The writing handwriting of the stylus pen is adjusted according to at least one of the azimuth included angle and the inclined included angle.

In a third aspect, the present application provides a handwriting sensing system including a stylus, a tablet, and the handwriting input control device described above.

The handwriting input control device provided in the embodiment of the present application adopts a simple structure and algorithm to detect the writing gesture, and implements the handwriting restoration of the stylus when writing on the tablet according to the detected writing gesture, that is, to adjust the writing handwriting. To make the writing effect of the stylus closer to the writing effect of the real writing pen, so as to bring a more realistic user experience to the user.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application or the prior art more clearly, 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 according to these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a handwriting sensing system according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a handwriting input control device according to an embodiment of the present application.

FIG. 3 is a schematic diagram of an azimuth angle and an inclination angle formed by a stylus pen and a corresponding reference plane in a three-dimensional space of the earth coordinate system.

FIG. 4 is a schematic diagram of the azimuth angle shown in FIG. 3 in the XY plane.

FIG. 5 is a schematic diagram of the inclination angle shown in FIG. 3 in a two-dimensional plane.

FIG. 6 is a schematic structural diagram of a controller according to an embodiment of the present application.

FIG. 7 is a schematic diagram of projections of the stylus pen and the preset directions of the tablet on a horizontal plane, respectively.

FIG. 8 is a schematic structural diagram of an inclination angle detection element according to an embodiment of the present application.

FIG. 9 is a schematic diagram of the pressure sensed by the pressure sensor of the tilt angle detecting element shown in FIG. 8 when the stylus pen is in a vertical state.

FIG. 10 is a schematic diagram of the pressure sensed by the pressure sensor of the inclination angle detecting element shown in FIG. 8 when the stylus pen is in an inclined state.

FIG. 11 is a schematic diagram of a writing handwriting presented on the tablet shown in FIG. 1.

FIG. 12 is a schematic diagram of another writing handwriting presented on the tablet shown in FIG. 1.

FIG. 13 is a schematic flowchart of a handwriting input control method according to an embodiment of the present application.

FIG. 14 is a schematic diagram of a sub-flow of a handwriting input control method according to an embodiment of the present application.

FIG. 15 is another schematic flowchart of a handwriting input control method according to an embodiment of the present application.

detailed description

In the following, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the 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 embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Please refer to FIG. 1, which is a schematic diagram of a handwriting sensing system 100 according to an embodiment of the present application. In the embodiment of the present application, the handwriting sensing system 100 includes at least a stylus pen 20, a handwriting pad 30, and a handwriting input control device 40. The stylus 20 is used in combination with the stylus 30. For the working principle of the stylus 30 and the stylus 20, reference may be made to related technologies. Since this part is not the focus of the invention of this application, it will not Detailed introduction. In this embodiment, the stylus pen 20 is a capacitive pencil.

In this embodiment, referring to FIG. 2, the handwriting input control device 40 includes an azimuth detection module 41, an inclination detection module 42, and an adjustment module 43. The azimuth detection module 41 is used to detect the azimuth included angle of the stylus 20 relative to the tablet 30 during the writing process, and the tilt angle detection module 42 is used to detect the handwriting during the writing process. The inclination angle of the pen 20 relative to the tablet 30, and the adjustment module 43 is configured to adjust the writing handwriting of the stylus 20 according to at least one of the azimuth angle and the inclination angle .

Before specifically introducing the detection scheme of the azimuth included angle and the tilt included angle of the stylus pen 20 relative to the tablet 30 in the present application, the “azimuth” to be referred to in the following of this application will be described with reference to FIGS. 3-5. Definitions of "angle" and "tilt angle".

Taking the stylus P as an example, FIG. 3-5 shows the relative position relationship between the stylus P and the corresponding reference plane in the earth coordinate system, and is used to explain the “azimuth angle” and “tilt angle” . The “azimuth angle” described in this application refers to an included angle of the stylus pen P with respect to a reference plane. The “tilt angle” described in this application refers to the angle between the stylus P and the horizontal plane XY. Among them, FIG. 3 is a schematic diagram of the azimuth angle and tilt angle formed by the stylus pen P and the corresponding reference plane in the three-dimensional space of the earth coordinate system, and FIG. 4 is a schematic diagram of the azimuth angle shown in FIG. 3 in the horizontal plane XY. 5 is a schematic diagram of the inclination angle shown in FIG. 3 in a two-dimensional reference plane. As shown in FIGS. 3 and 4, when the stylus P is inclined with respect to the horizontal plane XY, the angle between the projection P ′ of the stylus P on the horizontal plane XY and the X axis is the azimuth angle of the stylus P, It is expressed as β; as shown in FIGS. 3 and 5, the angle between the stylus pen P and the horizontal plane XY is the inclination angle of the stylus pen P, and it is expressed as θ.

The detection scheme of the azimuth included angle of the stylus pen 20 with respect to the tablet 30 according to the present application will be described in detail below with reference to FIGS. 1-2 and 7.

In this embodiment, as shown in FIG. 2, the azimuth detection module 41 includes an azimuth detection component 411 and a first calculation unit 412. The azimuth detection component 411 is configured to detect the azimuth data of the stylus 20 and the tablet 30 during the writing process, wherein the azimuth data of the stylus 30 reflects the prediction of the handwriting 30 Set the azimuth data of the direction.

In this embodiment, the first calculation unit 412 is configured to obtain azimuth data of the stylus 20 and the stylus 30 detected by the azimuth detection component 411, and according to the stylus 20 and The azimuth data of the stylus 30 calculates the azimuth of the stylus 20 and the preset directions of the stylus 30 respectively, and calculates the azimuth of the stylus 20 and the azimuth of the stylus 20 according to the calculated azimuth. The difference between the azimuth angles of the preset directions of the tablet 30, and the absolute value of the difference is determined as the azimuth included angle of the stylus 20 relative to the preset directions of the tablet 30. That is, the azimuth included angle refers to the included angle between the stylus 20 and the tablet 30 in the azimuth dimension.

Specifically, in this embodiment, as shown in FIG. 1, the azimuth detection component 411 includes a first azimuth detection element 4111 and a second azimuth detection element 4112, wherein the first azimuth detection element 4111 The stylus 20 is provided on the stylus 20 and is used to detect azimuth data of the stylus 20 during writing. The second azimuth detection element 4112 is disposed on the tablet 30 and is used to detect the azimuth data of the tablet 30 during writing.

Wherein, the preset direction of the tablet 30 may be set as a length direction or a width direction of the tablet 30, or may be set as a writing direction of the tablet 30, for example, horizontal or vertical. That is, the preset direction of the tablet 30 may not be unique, and may be switched according to the actual writing needs of the user. Correspondingly, the azimuth indicated by the azimuth data of the tablet 30 may be the same as the orientation in which the preset direction of the tablet 30 is located, or may differ by 90 degrees. For example, when the writing direction of the tablet 30 is horizontal, the direction indicated by the azimuth data of the tablet 30 may be the same as the direction of the horizontal direction of the tablet 30; when the writing direction of the tablet 30 is When switched to the vertical orientation, the orientation indicated by the azimuth data of the tablet 30 is 90 degrees different from the orientation in which the tablet 30 is vertically oriented.

In one embodiment, the first computing unit 412 may be an independent electronic device, and may be disposed in the handwriting tablet 30. Optionally, in another embodiment, as shown in FIGS. 1 and 6, the handwriting input control device 40 may further include a controller 44 provided in the tablet 30, and the first calculation unit 412 It may be a part of the controller 44. It can be understood that the stylus 20 and the tablet 30 are respectively provided with a wireless communication module (not shown), and the data detected by the first azimuth detection element 4111 can be transmitted through the stylus 20 The wireless communication module sends the wireless communication module on the tablet 30, and the wireless communication module on the tablet 30 transmits the wireless communication module to the first computing unit 412 or the controller 44. The second azimuth detection element 4112 may be electrically connected to the first calculation unit 412 or the controller 44 and directly transmit the detected data to the first calculation unit 412 or the controller 44. Since this part is not the focus of the invention of this application, it will not be described in detail here.

As shown in FIG. 7, it is a schematic diagram of projections of the stylus pen 20 and the preset directions of the stylus tablet 30 on the horizontal plane, respectively, where the direction A indicates the projection of the stylus pen 20 on the horizontal plane, and The angle β1 of the X axis represents the azimuth angle of the stylus pen 20, and the direction B indicates the projection of the preset direction of the tablet 30 on the horizontal plane, and the angle β2 of the X axis represents the The azimuth angle of the preset direction of the tablet 30 will be described.

It can be understood that when the azimuth angle of the stylus pen 20 calculated by the first calculation unit 412 and the azimuth angle of the preset direction of the tablet 30 are different, the value of the azimuth included angle is different. When it is zero, it can be determined that the orientation of the stylus 20 is different from the orientation of the preset direction of the tablet 30.

For example, as shown in FIG. 7, if β1 ≠ β2, it can be judged that the orientation of the stylus 20 during writing is different from the orientation of the preset direction of the stylus 30; otherwise, the stylus 20 can be judged The orientation during the writing process is the same as the orientation in the preset direction of the tablet 30.

In this embodiment, the first azimuth angle detecting element 4111 and the second azimuth angle detecting element 4112 may be geomagnetic sensors, and the first azimuth angle detecting element 4111 and the second azimuth angle detecting element 4112 detect The azimuth data indicates a geographic orientation.

The detection scheme of the inclination angle of the stylus pen 20 relative to the tablet 30 according to the present application will be described in detail with reference to FIGS. 1-2 and 8-10.

In this embodiment, as shown in FIG. 2, the tilt angle detection module 42 includes a tilt angle detection component 421 and a second calculation unit 422. The tilt angle detection component 421 is configured to detect tilt angle data of the stylus pen 20 and the tablet 30 during a writing process.

In this embodiment, the second calculation unit 422 is configured to obtain tilt angle data of the stylus pen 20 and the tablet 30 detected by the tilt angle detection component 421, and according to the stylus pen 20 and The tilt angle data of the tablet 30 calculates the tilt angles of the stylus 20 and the tablet 30, and calculates the tilt angle of the stylus 20 and the tablet according to the calculated tilt angles. The difference between the inclination angles of 30 and the absolute value of the difference is determined as the included angle of the inclination of the stylus 20 with respect to the tablet 30. That is, the inclined included angle refers to the actual included angle between the stylus 20 and the tablet 30 in the height dimension.

Specifically, in this embodiment, as shown in FIG. 1, the tilt angle detection component 421 includes a first tilt angle detection element 4211 and a second tilt angle detection element 4212, and the first tilt angle detection element 4211 is provided in The stylus 20 is used to detect the tilt angle data of the stylus 20 during writing. The second inclination angle detecting element 4212 is disposed on the tablet 30 and is used to detect the inclination angle data of the tablet 30 during a writing process.

In one embodiment, the second computing unit 422 may be an independent electronic device and may be disposed in the handwriting tablet 30. In another embodiment, as shown in FIG. 6, the second calculation unit 422 may also be a part of the controller 44. It can be understood that the data detected by the first tilt angle detection element 4211 can be sent to the wireless communication module on the tablet 30 through the wireless communication module on the stylus 20, and then the tablet 30 The wireless communication module is transmitted to the second computing unit 422 or the controller 44. The second tilt angle detection element 4212 may be electrically connected to the second calculation unit 422 or the controller 44, and directly transmit the detected data to the second calculation unit 422 or the controller 44. Since this part is not the focus of the invention of this application, it will not be described in detail here.

In this embodiment, as shown in FIG. 8, the first inclination angle detection element 4211 and the second inclination angle detection element 4212 each include a pressure sensor 4231 and a pressure sensor provided on a force-receiving surface of the pressure sensor 4231. The metal ball 4232, the tilt angle data is pressure data sensed by a corresponding pressure sensor 4231.

The second calculation unit 422 determines the tilt angle of the stylus 20 according to the pressure data sensed by the pressure sensor 4231 of the first tilt angle detection element 4211 and a first preset pressure value, wherein the first The preset pressure value is the gravity of the corresponding metal ball 4232 sensed by the pressure sensor 4231 of the first tilt angle detection element 4211 when the stylus 20 is in a vertical state.

The second calculation unit 422 also determines the tilt angle of the tablet 30 according to the pressure data sensed by the pressure sensor 4231 of the second tilt angle detection element 4212 and a second preset pressure value, wherein the first The two preset pressure values are the gravity of the corresponding metal ball 4232 sensed by the pressure sensor 4231 of the second tilt angle detection element 4212 when the tablet 30 is in a vertical state.

Taking the first tilt angle detecting element 4211 provided on the stylus pen 20 as an example, it is assumed that the gravity of the metal ball 4232 is m * g, as shown in FIG. 9, when the stylus pen 20 is in a vertical position In the state, the pressure F1 sensed by the pressure sensor 4231 is equal to the gravity m * g of the metal ball 4232, that is, F1 = m * g. As shown in FIG. 10, when the stylus pen 20 is in an inclined state and the included angle with the horizontal plane 50 is θ, the pressure F2 sensed by the pressure sensor 4231 is: F2 = m * g * sinθ. In this way, the tilt angle θ of the stylus pen 20 can be calculated as: θ = arcsin (F2 / F1). Since the detection scheme of the inclination angle of the handwriting pad 30 is similar to the detection scheme of the stylus pen 20, details are not repeated here.

The following describes in detail the adjustment scheme of the writing handwriting of the stylus 20 according to the above-mentioned azimuth included angle and / or inclined included angle with reference to FIGS. 11-12.

In one embodiment, the adjusting module 43 is configured to determine the calculated handwriting width corresponding to the calculated azimuth included angle according to a first preset correspondence between the azimuth included angle and the handwriting width, and display the determined handwriting width. The writing handwriting of the stylus pen 20 can adjust the thickness of the writing handwriting through the writing gesture.

Wherein, the adjustment module 43 is further configured to pre-calculate when the calculated azimuth included angle is zero, that is, when the orientation of the stylus 20 is the same as the orientation of the preset direction of the tablet 30. The standard width is set to display the writing handwriting of the stylus 20; and the calculated value of the orientation angle is not zero, that is, when the orientation of the stylus 20 is different from the preset of the stylus 30 When the direction is azimuth, the writing handwriting of the stylus 20 is displayed with other preset widths.

For example, as shown in FIG. 11, assuming that the writing handwriting T1 is the same orientation as the orientation of the stylus 20 and the preset orientation of the tablet 30, the handwriting input by the stylus 20 in the tablet 30; The writing handwriting T2 is an orientation in which the orientation of the stylus 20 is different from a preset direction of the tablet 30, and when the included angle of the orientation of the stylus 20 with respect to the tablet 30 is β1, the handwriting The handwriting input by the pen 20 in the handwriting pad 30; the writing handwriting T3 is an orientation in which the stylus pen 20 is oriented different from a preset direction of the handwriting pad 30, and the stylus pen 20 is relative to the handwriting When the azimuth included angle of the plate 30 is β2, the handwriting input by the stylus pen 20 in the handwriting plate 30, where 0 <β1 <β2 ≦ 90 °.

That is, the preset standard width is smaller than other preset widths. When the orientation of the stylus 20 is the same as the orientation of the preset direction of the tablet 30, the handwriting width of the writing handwriting is the largest. Narrow, and when the orientation of the stylus 20 is different from the orientation of the preset direction of the tablet 30, the relationship between the width of the handwriting of the writing handwriting and the orientation angle is proportional, that is, the orientation clip The larger the angle, the wider the handwriting width of the writing handwriting.

Optionally, in some embodiments, the adjustment module 43 is further configured to adjust the azimuth angle of the stylus 20 to be greater than the azimuth angle of the preset direction of the stylus 30, that is, the azimuth of the stylus 20 When the difference between the azimuth and the azimuth angle of the preset direction of the tablet 30 is greater than zero, the color of the writing handwriting is gradually faded along the first direction, and the azimuth of the pen 20 is smaller than the azimuth of the tablet When the difference between the azimuth angle of the preset direction of 30, that is, the azimuth angle of the stylus pen 20 and the azimuth angle of the preset direction of the tablet 30 is less than zero, the writing handwriting is gradually faded in the second direction. s color. The first direction and the second direction are two opposite directions. In this way, the relationship between the handwriting and the holding direction of the stylus and the writing force during real writing can be reflected, thereby providing a user experience.

For example, as shown in FIG. 12, assuming that the writing handwriting T4 is an azimuth angle of the stylus 20 greater than a preset direction of the stylus 30, the handwriting input by the stylus 20 in the stylus 30, The color of the writing handwriting T4 gradually fades along the first direction D1. At this time, the holding direction of the stylus pen 20 with respect to the tablet 30 is the first direction D1. When the writing handwriting T5 is the azimuth angle of the stylus pen 20 smaller than the azimuth angle of the preset direction of the handwriting tablet 30, the handwriting input by the stylus pen 20 in the handwriting tablet 30, the color of the writing handwriting T5 Fading gradually in the second direction D2. At this time, the holding direction of the stylus pen 20 with respect to the tablet 30 is the second direction D2.

Optionally, in another embodiment, the adjustment module 43 is configured to determine the handwriting width corresponding to the calculated inclined angle according to a second preset correspondence between the inclined angle and the handwriting width, and The determined handwriting width displays the writing handwriting of the stylus 20, so that the thickness of the writing handwriting can be adjusted by the writing gesture.

The adjustment module 43 may be further configured to display the handwriting with a preset standard width when the calculated value of the tilt angle is 90 degrees, that is, when the stylus 20 is perpendicular to the tablet 30. The writing handwriting of the pen 20; and the calculated value of the tilt angle is not 90 degrees, that is, when the stylus pen 20 is tilted relative to the tablet 30, the preset width is displayed in another Writing handwriting of the stylus 20.

For example, also taking FIG. 11 as an example, assuming that the writing handwriting T1 is the handwriting input by the stylus pen 20 in the writing pad 30 when the stylus pen 20 is perpendicular to the writing pad 30; the writing handwriting T2 is the When the inclination angle of the stylus pen 20 relative to the tablet 30 is θ1, the handwriting input by the stylus pen 20 in the tablet 30; the writing handwriting T3 is the stylus 20 relative to the tablet 30 When the angle of inclination is θ2, the handwriting input by the stylus pen 20 in the tablet 30 is 90 °> θ1> θ2> 0.

That is, the preset standard width is smaller than other preset widths. When the stylus 20 is perpendicular to the tablet 30, the handwriting width of the writing handwriting is the narrowest, while the stylus 20 is relatively When the handwriting board 30 is tilted, the handwriting width of the writing handwriting is inversely proportional to the tilting included angle, that is, the smaller the tilted included angle, the wider the handwriting width of the writing handwriting.

Optionally, in still another embodiment, the adjustment module 43 may be further configured to determine the calculated azimuth included angle and tilt according to a third preset correspondence between the azimuth included angle, the tilt included angle, and the handwriting width. The width of the handwriting corresponding to the included angle, and the determined handwriting width displays the writing handwriting of the stylus, so that the thickness of the writing handwriting can be adjusted by the writing gesture. That is, the width of the handwriting is related to both the azimuth included angle and the inclined included angle.

Optionally, in still other embodiments, the adjustment module 43 may be specifically configured to be used when the value of the azimuth included angle is zero, that is, the orientation in which the stylus 20 faces and the preset of the handwriting pad 30 When the directions and orientations are the same, the handwriting of the stylus 20 is displayed with a preset standard width; and when the value of the orientation angle is not zero, that is, the orientation of the stylus 20 is different from the handwriting When the orientation of the board 30 is in a preset direction, the handwriting width corresponding to the calculated oblique included angle is determined according to the fourth preset correspondence between the oblique included angle and the handwriting width, and the determined handwriting width displays the stylus Writing handwriting.

That is, when the orientation of the stylus 20 is the same as the orientation of the preset direction of the tablet 30, the width of the handwriting is independent of the tilt angle and is a preset standard width; When the orientation of the stylus 20 is different from the orientation of the preset direction of the tablet 30, the width of the handwriting is proportional to the inclined included angle. The fourth preset correspondence may be the same as the second preset correspondence. It can be understood that the fourth preset correspondence may be different from the second preset correspondence.

It can be understood that the change in the handwriting width of the writing handwriting is not limited to the above example, and those skilled in the art can also make some deformations based on this example.

In one embodiment, the adjustment module 43 may be an independent electronic device and connected to the first calculation unit 412 and the second calculation unit 422, respectively, so as to obtain the determination determined by the first calculation unit 412. The azimuth included angle and the tilt included angle determined by the second calculation unit 422 are used to adjust the writing handwriting of the stylus according to the azimuth included angle and / or the tilt included angle. Optionally, in another embodiment, as shown in FIG. 6, the adjustment module 43 may also be a part of the controller 44.

Please refer to FIG. 1 again. In this embodiment, the handwriting input control device 40 may further include a storage module 45. The storage module 45 may be used to store the first, second, third, Four preset correspondences, a first preset pressure value, a second preset pressure value, and the like. The storage module 45 may be disposed on the tablet 30. The storage module 45 may include a high-speed random access memory, and may also include a non-volatile memory, such as a Smart Memory Card (SMC). , Flash Cards, etc.

The handwriting input control device 40 provided in the embodiment of the present application uses a simple structure and algorithm to detect a writing gesture, and implements handwriting restoration of the stylus 20 when writing on the tablet 30 according to the detected writing gesture, that is, The writing handwriting is adjusted so that the writing effect of the stylus pen 20 is closer to that of a real writing pen, so as to bring a more realistic use experience to the user.

FIG. 13 is a schematic flowchart of a handwriting input control method according to an embodiment of the present application. In the handwriting input control method, the handwriting input control device 40 described above can be used to adjust the writing handwriting of the stylus pen 20 so that the writing effect of the stylus pen 20 is closer to that of a real writing pen. As shown in FIG. 13, the handwriting input control method includes the following steps.

Step 1301: Detect an azimuth included angle of the stylus pen 20 with respect to the tablet 30 during a writing process, and detect a tilt included angle of the stylus pen 20 with respect to the tablet 30.

FIG. 14 is a schematic diagram of a sub-flow of a handwriting input control method according to an embodiment of the present application, which is used to detect an azimuth angle of the stylus 20 with respect to the tablet 30 during a writing process. As shown in FIG. 14, the handwriting input control method includes the following steps.

Step 1401: Detect the azimuth data of the stylus 20 and the tablet 30 during the writing process, wherein the azimuth data of the stylus 30 is azimuth data that reflects a preset direction of the tablet 30.

Step 1402: Calculate the azimuth angles in the preset directions of the stylus pen 20 and the handwriting pad 30 respectively according to the azimuth angle data of the stylus pen 20 and the handwriting pad 30.

Step 1403: Calculate a difference between the azimuth angle of the stylus 20 and the azimuth angle of the preset direction of the tablet 30 according to the calculated azimuth angle, and determine an absolute value of the difference value The included angle of the stylus pen 20 relative to the preset direction of the stylus board 30.

It can be understood that when the calculated azimuth angle of the stylus pen 20 and the azimuth angle of the preset direction of the tablet 30 are different, that is, when the value of the azimuth included angle is not zero, it can be judged that The orientation of the stylus 20 is different from the orientation of the preset direction of the tablet 30.

FIG. 15 is a schematic diagram of a sub-flow of a handwriting input control method according to an embodiment of the present application, which is used to detect an inclination angle of the stylus pen 20 with respect to the handwriting board 30 during a writing process. As shown in FIG. 15, the handwriting input control method includes the following steps.

Step 1501: Detecting tilt angle data of the stylus 20 and the stylus 30 during writing.

Step 1502: Calculate the tilt angles of the stylus pen 20 and the tablet 30 according to the tilt angle data of the stylus pen 20 and the tablet 30.

Step 1503: Calculate a difference between the tilt angle of the stylus pen 20 and the tilt angle of the tablet 30 according to the calculated tilt angle, and determine the absolute value of the difference as the handwriting. The included angle of the pen 20 relative to the tablet 30.

Referring to FIG. 13 again, in step 1302, the writing handwriting of the stylus pen is adjusted according to at least one of the azimuth included angle and the inclined included angle.

In one embodiment, the step 1302 may specifically include:

According to the first preset correspondence between the azimuth included angle and the handwriting width, the calculated handwriting width corresponding to the azimuth included angle is calculated, and the determined handwriting width displays the writing handwriting of the stylus 20, so that the writing gesture can be determined by To adjust the thickness of the handwriting.

Wherein, when the calculated azimuth included angle is zero, that is, when the orientation of the stylus 20 is the same as the orientation of the preset direction of the tablet 30, the handwriting is displayed with a preset standard width. The writing handwriting of the pen 20; and the calculated azimuth included angle value is not zero, that is, when the orientation of the stylus pen 20 is different from the orientation of the preset direction of the tablet 30, other The preset width displays the writing handwriting of the stylus 20.

Optionally, in some embodiments, the handwriting input control method may further include:

Comparing the azimuth angle of the stylus 20 and the azimuth angle of the preset direction of the stylus 30;

When the azimuth angle of the stylus pen 20 is greater than the azimuth angle of the preset direction of the tablet 30, gradually fade the color of the writing handwriting along the first direction; and

When the azimuth angle of the stylus pen 20 is smaller than the azimuth angle of the preset direction of the tablet 30, gradually fade the color of the writing handwriting along the second direction;

The first direction and the second direction are two opposite directions.

In this way, the relationship between the handwriting and the holding direction of the stylus and the writing force during real writing can be reflected, thereby providing a user experience.

Optionally, in another embodiment, the step 1302 may specifically include:

Determine the calculated handwriting width corresponding to the inclined included angle according to the second preset correspondence between the inclined included angle and the handwriting width, and display the writing handwriting of the stylus 20 with the determined handwriting width, so that the writing gesture can be displayed by To adjust the thickness of the handwriting.

Wherein, when the calculated value of the inclined angle is 90 degrees, that is, when the stylus pen 20 is perpendicular to the stylus board 30, the writing handwriting of the stylus pen 20 can be displayed with a preset standard width. When the value of the calculated tilt angle is not 90 degrees, that is, when the stylus pen 20 is tilted relative to the tablet 30, the writing handwriting of the stylus pen 20 may be displayed in other preset widths.

Optionally, in still another embodiment, the step 1302 may specifically include:

Determine the calculated handwriting width corresponding to the azimuth included angle and the inclined included angle according to the third preset correspondence between the azimuth included angle, the inclined included angle, and the handwriting width, and display the writing of the stylus with the determined handwriting width Handwriting, so that the thickness of the writing handwriting can be adjusted by the writing gesture. That is, the width of the handwriting is related to both the azimuth included angle and the inclined included angle.

Optionally, in still other embodiments, the step 1302 may specifically include:

Displaying the writing handwriting of the stylus 20 with a preset standard width when the azimuth included angle is zero; and

When the value of the azimuth included angle is not zero, according to the fourth preset correspondence between the inclined included angle and the handwriting width, the calculated handwriting width corresponding to the calculated inclined included angle is determined, and the determined handwriting width is displayed. The writing handwriting of the stylus is described.

The handwriting input control method provided in the embodiment of the present application detects the writing gesture and adjusts the writing handwriting according to the detected writing gesture, so that the writing effect of the stylus pen is closer to the writing effect of the real writing pen, which can further bring the user More authentic use experience.

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 handwriting input control device is applied to a handwriting induction system. The handwriting induction system includes a stylus pen and a tablet. The handwriting input control device includes:

An azimuth detection module, configured to detect an azimuth included angle of the stylus relative to the tablet during writing;

An inclination angle detection module for detecting an inclination angle of the stylus with respect to the tablet during writing; and

An adjustment module is configured to adjust writing handwriting of the stylus according to at least one of the azimuth included angle and the inclined included angle.
The handwriting input control device according to claim 1, wherein the adjustment module is configured to determine a handwriting width corresponding to the calculated azimuth included angle according to a first preset correspondence between the azimuth included angle and the handwriting width. And display the handwriting of the stylus with a determined handwriting width; or

The adjusting module is configured to determine a calculated handwriting width corresponding to the inclined included angle according to a second preset correspondence between the inclined included angle and the handwriting width, and display the writing handwriting of the stylus with the determined handwriting width; or

The adjusting module is configured to determine the calculated handwriting width corresponding to the azimuth included angle and the inclined included angle according to the third preset corresponding relationship of the azimuth included angle, the inclined included angle, and the handwriting width, and display the determined handwriting width. The writing of the stylus; or

The adjusting module is configured to display the writing handwriting of the stylus pen with a preset standard width when the azimuth included angle is zero; and when the azimuth included angle is not zero, according to the tilt clamp The fourth preset correspondence between the angle and the width of the handwriting, determines the handwriting width corresponding to the calculated inclined angle, and displays the writing handwriting of the stylus with the determined handwriting width.
The handwriting input control device according to claim 1 or 2, wherein the azimuth detection module comprises:

An azimuth detection component, configured to detect azimuth data of the stylus and the tablet during writing, wherein the azimuth data of the tablet is azimuth data reflecting a preset direction of the tablet; as well as

A first calculation unit, configured to calculate an azimuth angle in a preset direction of the stylus pen and the tablet according to the azimuth angle data of the stylus pen and the tablet, and to calculate the azimuth angle based on the calculated azimuth angle Calculating a difference between an azimuth angle of the stylus and an azimuth angle of a preset direction of the tablet, and determining an absolute value of the difference as a preset of the stylus relative to the tablet The azimuth angle of the direction.
The handwriting input control device according to claim 3, wherein the azimuth detection component comprises:

A first azimuth angle detecting element, which is provided on the stylus pen and is used to detect azimuth angle data of the stylus pen during writing;

A second azimuth angle detecting element is provided on the tablet and is used to detect the azimuth data of the tablet during writing.
The handwriting input control device according to claim 4, wherein the first azimuth detection element and the second azimuth detection element are geomagnetic sensors.
The handwriting input control device according to claim 1 or 2, wherein the tilt angle detection module comprises:

An inclination angle detecting component for detecting inclination angle data of the stylus pen and the tablet during writing; and

A second calculation unit, configured to calculate the inclination angles of the stylus pen and the tablet according to the inclination angle data of the stylus pen and the stylus tablet, and calculate the handwriting according to the calculated inclination angles The difference between the tilt angle of the pen and the tilt angle of the tablet, and the absolute value of the difference is determined as the tilt angle of the pen with respect to the tablet.
The handwriting input control device according to claim 6, wherein the tilt angle detection component comprises:

A first inclination angle detecting element, which is provided on the stylus pen and is used to detect inclination angle data of the stylus pen in a writing process;

A second inclination angle detecting element is provided on the tablet and is used to detect the inclination angle data of the tablet during writing.
The handwriting input control device according to claim 7, wherein the first inclination angle detection element and the second inclination angle detection element each include a pressure sensor and a pressure sensor provided on a force-receiving surface of the pressure sensor. For a metal ball, the tilt angle data is pressure data sensed by a corresponding pressure sensor.
The handwriting input control device according to claim 8, wherein the second computing unit determines the first data based on pressure data sensed by a pressure sensor of the first tilt angle detection element and a first preset pressure value. The tilt angle of the stylus, wherein the first preset pressure value is the gravity of the corresponding metal ball sensed by the pressure sensor of the first tilt angle detection element when the stylus is in a vertical state;

The second calculation unit further determines the tilt angle of the tablet according to pressure data sensed by the pressure sensor of the second tilt angle detection element and a second preset pressure value, wherein the second preset pressure The value of the gravity of the corresponding metal ball sensed by the pressure sensor of the second tilt angle detecting element when the tablet is in a vertical state.
The handwriting input control device according to claim 3, wherein the adjustment module is further configured to gradually move along the first direction when the azimuth angle of the stylus pen is greater than the azimuth angle of the preset direction of the tablet. Fade the color of the writing handwriting, and gradually fade the color of the writing handwriting along the second direction when the azimuth angle of the stylus pen is smaller than the azimuth angle of the preset direction of the tablet, wherein the first The directions are opposite to the second direction.
A handwriting input control method includes:

Detecting the azimuth included angle of the stylus with respect to the tablet during the writing process, and detecting the tilt angle of the stylus with respect to the tablet; and

The writing handwriting of the stylus pen is adjusted according to at least one of the azimuth included angle and the inclined included angle.
The handwriting input control method according to claim 11, wherein the "adjusting the writing handwriting of the stylus according to at least one of the azimuth included angle and the inclined included angle" comprises:

Determining the calculated handwriting width corresponding to the azimuth included angle according to a first preset correspondence between the azimuth included angle and the handwriting width, and displaying the writing handwriting of the stylus with the determined handwriting width; or

Determining the calculated handwriting width corresponding to the inclined included angle according to the second preset correspondence between the inclined included angle and the handwriting width, and displaying the writing handwriting of the stylus with the determined handwriting width; or

Determine the calculated handwriting width corresponding to the azimuth included angle and the inclined included angle according to the third preset correspondence between the azimuth included angle, the inclined included angle, and the handwriting width, and display the writing of the stylus with the determined handwriting width Handwriting; or

When the azimuth included angle is zero, the writing handwriting of the stylus is displayed with a preset standard width; and when the azimuth included angle is not zero, according to the first Four preset correspondence relationships determine the handwriting width corresponding to the calculated inclined angle, and the determined handwriting width displays the writing handwriting of the stylus.
The method for controlling a handwriting input according to claim 11 or 12, wherein the "detecting the azimuth angle of the stylus with respect to the tablet during the writing process" comprises:

Detecting azimuth data of the stylus pen and the tablet during writing, wherein the azimuth data of the pen is azimuth data reflecting a preset direction of the pen;

Calculate the azimuth angles of the preset directions of the stylus pen and the tablet according to the azimuth data of the stylus pen and the tablet; and

Calculate a difference between the azimuth of the stylus and the azimuth of a preset direction of the tablet according to the calculated azimuth, and determine the absolute value of the difference as the stylus An azimuth included angle with respect to a preset direction of the tablet.
The method for controlling a handwriting input according to claim 11 or 12, wherein the "detecting the inclination angle of the stylus with respect to the tablet during writing" comprises:

Detecting tilt angle data of the stylus pen and the tablet during writing;

Calculate the tilt angles of the stylus pen and the tablet according to the tilt angle data of the stylus pen and the tablet; and

Calculate a difference between the tilt angle of the stylus and the tilt angle of the stylus according to the calculated tilt angle, and determine the absolute value of the difference as the stylus relative to the Angle of the tilt of the tablet.
The method for controlling handwriting input according to claim 13, further comprising:

Comparing the azimuth angle of the stylus and the azimuth angle of a preset direction of the tablet;

When the azimuth angle of the stylus pen is greater than the azimuth angle of the preset direction of the tablet, gradually fade the color of the writing handwriting along the first direction; and

When the azimuth angle of the stylus is smaller than the azimuth angle of the preset direction of the tablet, gradually fade the color of the writing handwriting along the second direction;

The first direction and the second direction are two opposite directions.
A handwriting sensing system includes a stylus, a tablet, and a handwriting input control device according to any one of claims 1-10.