WO2019090765A1

WO2019090765A1 - Writing board, writing board assembly and writing method for writing board

Info

Publication number: WO2019090765A1
Application number: PCT/CN2017/110698
Authority: WO
Inventors: 叶泽钢
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2017-11-13
Filing date: 2017-11-13
Publication date: 2019-05-16
Also published as: CN110914795A

Abstract

A writing board, a writing board assembly and a writing method for a writing board. The writing board comprises a touch screen that receives a touch operation, the touch screen sensing a track of a soft keyboard that is drawn by a user to form a soft keyboard corresponding to the track (S21); the soft keyboard is used for receiving a touch signal of the user so as to output a corresponding key value (S22). The writing board allows a user to manually draw a soft keyboard that suits the usage habits of the user, and the display position and size of the soft keyboard may be adjusted. The writing board has multiple input modes: soft keyboard-only input, writing pen-only input, and simultaneously performing soft keyboard input and writing pet input, thereby satisfying the personalized input requirements of different users and improving the experience of use.

Description

Writing method of writing board, writing board component and writing board

[0001] The present invention relates to the field of writing tablets, and more particularly to a writing method for a writing board, a writing board assembly, and a writing board.

Background technique

[0002] Some existing writing boards can only use the writing pen input, and the soft keyboard input cannot be performed. Some of the writing boards are provided with a soft keyboard, but the position of the soft keyboard is fixed. Only the coordinate points of the fixed area can be collected, and the coordinate points are converted into key value output. The position and size of the soft keyboard cannot be flexibly adjusted, and the user cannot be flexibly adjusted according to the user. The personalized requirements set keyboard, can not meet the needs of users.

technical problem

[0003] It is an object of the present invention to provide a writing method for a tablet, a tablet, and a tablet to solve the problems of the prior art described above.

Problem solution

Technical solution

[0004] It is an object of the present invention to provide a writing method for a tablet, a tablet assembly, and a tablet to solve the problems of the prior art described above.

[0005] The present invention provides a tablet, which includes a touch screen that receives a touch operation, and the touch screen senses a trajectory of a soft keyboard drawn by a user to form a soft keyboard corresponding to the trajectory; the soft keyboard is configured to receive a touch signal of the user and output a corresponding Key value.

The present invention further provides a tablet assembly, comprising the above-mentioned tablet, further comprising a writing pen; and the touch screen of the tablet receives the coordinate of the pressing point after receiving the pressing of the writing pen.

The present invention also provides a writing method of a tablet, the tablet includes a touch screen for receiving a touch operation, and the method includes the following steps:

[0008] forming a soft keyboard corresponding to the trajectory by sensing a trajectory of the soft keyboard drawn by the user through the touch screen;

[0009] The user receives a touch signal through the soft keyboard to output a corresponding key value.

Advantageous effects of the invention Beneficial effect

[0010] The tablet of the present invention can allow a user to manually draw a soft keyboard that conforms to his own usage habits, can adjust the display position and size of the soft keyboard, and has various input modes to meet different input requirements of the user.

Brief description of the drawing

DRAWINGS

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic diagram of input mode switching of a tablet according to the present invention;

2 is a schematic structural view of a hand-drawn soft keyboard of the present invention;

3 is a schematic flow chart of a hand-drawn soft keyboard of the present invention;

4 is a schematic flow chart of a writing method of a tablet according to the present invention;

5 is a schematic diagram of a user identity authentication process of the tablet of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] In order to more clearly understand the technical features, objects and advantages of the present invention, embodiments of the present invention are described in detail with reference to the accompanying drawings.

[0018] The present invention provides a tablet, which includes a writing display for receiving a writing pen input, receiving a touch operation, and displaying a soft keyboard, that is, the tablet can receive a handwriting input of the writing pen, such as a writing pen. Sliding, clicking, etc.; can also receive user touch operations, such as click touch operation, sliding touch operation and pressing touch operation; meanwhile, the writing display of the tablet can also display a soft keyboard, the user can pass the soft keyboard Type the writing. And if you don't need a soft keyboard, you can hide the soft keyboard for easy use. Further, the input mode of the tablet includes: a first input mode, a second input mode, and a third input mode, which are respectively described below.

[0019] The first input mode: The user hides the soft keyboard after the user does not need a soft keyboard. Thereafter, the writing display of the tablet only receives the writing operation of the writing pen and generates a first writing signal, and the first writing signal may be image information such as characters, numbers, symbols, images, and the like. Preferably, in the first input mode, the writing display screen does not receive contact of a user's finger, palm or the like to prevent a false touch phenomenon during the handwriting process.

[0020] The second input mode: after the user needs keyboard input, the soft keyboard display instruction indicates that the writing display screen displays a soft keyboard, and the soft keyboard can receive the key operation to generate a second writing signal, and the second writing signal can be a word The corresponding key value of the parent, text, symbol, etc. Preferably, in the second input mode, the writing display screen is closed to receive the input of the writing pen, thereby preventing the writing pen from generating a false touch phenomenon.

[0021] The third input mode: when the user needs both keyboard input and handwriting, the writing display screen displays a soft keyboard, and the soft keyboard can only occupy part of the writing display screen, thereby leaving a handwriting input for the writing pen. Writing area. That is to say, a part of the writing display screen displays a soft keyboard, and the soft keyboard receives the key operation to generate a second writing signal; the area where the soft keyboard is not displayed in the writing display screen receives the writing operation of the writing pen to generate a first writing signal.

[0022] In the second input mode and the third input mode, the soft keyboard may receive a separate key operation, and may also receive a combined key operation including a two-key combination operation and a multi-key combination operation. During the input combination operation, when the writing display screen is the same or the button operation signal of two or more positions is received within the preset time, the combined key signal is generated correspondingly.

[0023] According to requirements, the above three input modes can be freely switched by the mode switching signal, that is, the mode switching signal is used for the tablet switching input mode. There are several ways to generate the mode switching signal: it can be generated by the mode switching button receiving press, and the mode switching button can be both physical button and virtual button. Alternatively, the mode switching signal is generated by the touch screen receiving touch operation, for example, drawing a preset pattern, or sliding from the edge of the writing display to the middle, or three fingers touching the screen. Alternatively, the mode switching signal may be generated by a particular voice signal received by the microphone of the tablet. Alternatively, the mode switching signal may be generated by the image recognition module of the tablet to recognize a particular gesture action; or the mode switching signal may also be generated by the tablet to generate a wireless signal.

[0024] Referring to FIG. 1, FIG. 1 is a schematic diagram of input mode switching of a tablet according to the present invention. The tablet on the left side of Figure 1 is in the first input mode, that is, the soft keyboard is not displayed, and the writing operation can only be performed by the writing pen. If the tablet receives the mode switching signal, the soft keyboard is displayed, and the tablet on the right side can be in the second input mode or the third input mode.

[0025] Further, after the writing board generates the writing signal, the writing signal needs to be sent to the terminal by wire or wirelessly, and the terminal includes but is not limited to: a desktop computer, a notebook computer, a tablet computer, a mobile phone, a smart watch, and the like. Therefore, the tablet further includes a wireless communication module for converting the first writing signal and the second writing signal into a wireless signal, and the tablet can establish a connection with the terminal through the wireless communication module, and convert the writing signal into Suitable for wireless transmission of wireless signals and sent to the terminal. Preferably, The wireless communication module can be a Bluetooth module, a WIFI module, or the like.

[0026] In some embodiments, the tablet of the present invention further includes a light-emitting layer attached to the lower surface of the touch screen. After the soft keyboard is displayed, the light-emitting layer emits light, and the shape of the soft keyboard and the shape of the characters in the keyboard are displayed, thereby facilitating the user. Press the button. The luminescent layer can be an LED array layer, an LCD display, an OLED display, or the like.

[0027] In some embodiments, after the soft keyboard receives the button operation, the illuminating layer displays different colors at the position corresponding to the button operation, thereby playing a prompting role. Further, when the writing pen is pressed by a certain button, the proximity of the writing pen can be sensed, thereby determining the button pointed by the writing pen, and then controlling the button to display different colors, prompting the user to contact the button, facilitating the user to input .

[0028] Further, the soft keyboard of the present invention includes a preset soft keyboard and a hand-drawn soft keyboard. The preset soft keyboard is stored in the storage unit of the tablet. The shape of the preset soft keyboard, the number of buttons, the button distribution and the display position are all set in advance. For example, the preset soft keyboard is 83, 87, 93, 96. Key, 101 key, 102 key, 1 04 key, 107 key keyboard, etc. After receiving the mode switching signal, the preset soft keyboard is displayed according to the preset shape, button distribution and display position. If a plurality of preset keyboards are stored in the storage unit, the user can freely select the desired preset soft keyboard. It can be understood that the button area corresponding to each button has been determined, and when the user performs a button operation in the button area, a key value signal corresponding to the button is generated.

[0029] The hand-drawn soft keyboard is drawn by the sliding operation of the writing display screen. Referring to FIG. 2 and FIG. 3, FIG. 2 is a schematic structural diagram of the hand-drawn soft keyboard of the present invention, and FIG. 3 is a schematic flow chart of the hand-drawn soft keyboard of the present invention.

[0030] Specifically, the drawing process of the hand-drawn soft keyboard includes:

[0031] S11: Record a movement track of the sliding operation, and identify and determine whether the movement track is a preset character. The writing display screen of the present invention is distributed with a plurality of flexible sensors, and the flexible sensor can collect touch or press operation signals. For example, the user draws on the writing display screen by using a writing pen or a finger, and the flexible sensor passing the sliding track generates an induction signal. The movement trajectory of the sliding operation is recorded by collecting the touch screen contacts. Further, it is recognized and judged whether the moving track is a preset character. For example, by optical character recognition

(Optical Character Recognition, OCR) Identifies the movement track and compares the recognized characters with the preset characters.

[0032] S12: After comparison, if the movement track is a preset character, the recording movement track is a character track, and a correspondence relationship between the character track and the preset character is established. For example, the user draws a "Q" on the writing display, records the movement trajectory, and then uses OCR for recognition, and the recognition result is performed with the preset characters in the memory. Match. After the match is obtained as the character Q, the movement trajectory is 0. Since the character Q pre-stored in the memory already corresponds to the corresponding key value, the movement track Q also corresponds to the key value, thereby establishing a correspondence relationship between the movement track and the key value. Preset characters include but are not limited to: uppercase letters, lowercase letters, numbers, symbols, arrows, shortcuts, and so on. Preferably, the preset character can also be set as a blank character, the blank character is used for the user-defined character, and the user needs to set a character that is not normally in the keyboard, allowing the user to customize. In this case, the movement track is directly obtained, and the movement track is directly used as a preset character. After the setting is completed, the button outputs the graphic drawn by the user himself. With the blank character setting, the user can customize the characters that are not in the regular keyboard, making the keyboard more user-friendly.

[0033] S13: After comparison, if the moving track is not a preset character, the moving track is recorded as a button boundary.

In the process of drawing a soft keyboard, not only the characters but also the boundaries of the keys are drawn. The boundary is set around the character, and the closed area can be formed, and the shape of the boundary is not limited, and may be, for example, a rectangle, a circle, a triangle, or the like.

[0034] S14: By step S12 and S13, the character track in the button boundary and the button boundary is combined into a button, and the area enclosed by the boundary of the button is the button area of the button, and when the button area receives the pressing operation吋

, generate the corresponding key value signal.

[0035] S15: A plurality of buttons constitute a hand-drawn soft keyboard. Since the hand-drawn soft keyboard is drawn by the user and the button distribution is not limited, the user can draw according to his own input habits. After the drawing is completed, the hand-drawn soft keyboard is stored in the storage unit, and the hand-drawn soft keyboard can be multiple.

[0036] The hand-drawn soft keyboard can be drawn according to the user's individual needs. The keyboard attribute information such as the size of the keyboard, the number of keys, the key characters, the display position, and the button arrangement can be set by the user, which fully satisfies the individual needs of the user.

[0037] Further, the tablet of the above embodiment is substantially a writing touch screen. The writing touch screen provides only a writing function, and does not provide a display function, and the track written on the tablet needs to be displayed through a terminal communicatively connected to the tablet. In this case, a blank sheet of paper can be placed on the writing touch screen, and the user can draw a trajectory of the soft keyboard on the white paper by using a writing pen. In the process of drawing the trajectory of the soft keyboard, in addition to the ink trajectory left by the writing pen on the white paper, the writing touch screen also receives the touch signal of the writing pen, thereby generating the touch trajectory corresponding to the ink trajectory, forming data. Soft keyboard. In other words, this way can form a physical soft keyboard and a data soft keyboard. User can be white The touch button on the materialized soft keyboard on the paper, the data soft keyboard located under the materialized soft keyboard will accept the user's touch, so that the corresponding characters are displayed on the terminal. Since the tablet of the embodiment does not need to provide a display function, the cost can be effectively reduced, and the application is facilitated.

[0038] In addition, the present invention also provides a tablet assembly, including the above-mentioned tablet, and a writing pen. For the specific structure of the tablet, refer to the above description, and details are not described herein again.

[0039] For the writing pen, after the writing display screen receives the pressing of the writing pen, the coordinate information of the pressing point is acquired, and the corresponding key is acquired according to the coordinate information, and the key value signal is output.

[0040] In some embodiments, the writing pen includes a wireless signal transmitting module for transmitting a wireless signal; the tablet obtains position information of the pointing point of the writing pen according to the wireless signal transmitted by the writing pen, and acquires a button pointed by the writing pen according to the position information. , change the color of the button.

[0041] In addition, the present invention further provides a writing method of a tablet, the tablet includes a touch screen that receives a touch operation.

[0042] Referring to FIG. 4, it is a schematic flow chart of a writing method of a tablet according to the present invention. The writing method includes the following steps:

[0043] S21: forming a soft keyboard corresponding to the trajectory by sensing a trajectory of the soft keyboard drawn by the user through the touch screen.

[0044] Specifically, the soft keyboard corresponding to the trajectory is formed by sensing the trajectory of the soft keyboard drawn by the user through the touch screen, and includes:

[0045] the touch screen senses a sliding operation applied by the user, records a moving track of the sliding operation, and identifies and determines whether the moving track is a preset character;

[0046] If yes, recording the movement track as a character track, and establishing a correspondence between the character track and the preset character; [0047] if not, recording the movement track as a button boundary;

[0048] The key trajectory within the boundary of the button and the boundary of the button is combined into one button, and the plurality of buttons constitute a soft keyboard.

[0049] Preferably, the tablet further comprises a paper attached on the surface of the touch screen; and the soft keyboard corresponding to the trajectory formed by sensing the trajectory of the soft keyboard drawn by the user through the touch screen comprises:

[0050] The user draws a trajectory of the soft keyboard on the paper by using a writing pen, and forms a soft keyboard drawn by the writing pen ink on the paper, and the touch screen forms a soft keyboard corresponding to the soft keyboard drawn by the ink.

[0051] Preferably, the shape and arrangement of the soft keyboard are the same as the trajectory of the soft keyboard drawn by the user.

[0052] S22: Receive a corresponding key value by receiving a touch signal of the user through a soft keyboard. [0053] Preferably, in the process of using the tablet, it is first detected whether a soft keyboard display instruction is received. The soft keyboard display command can be generated by receiving a press button by the display switch button, and the display switch button includes two types of a physical button and a virtual button. Alternatively, the soft keyboard display command is generated by the touch screen receiving touch operation, for example, drawing a preset pattern, or sliding from the edge of the writing display screen to the middle, or three fingers touching the screen, etc. Alternatively, the soft keyboard display command can also be generated by a particular voice signal received by the microphone of the tablet. Alternatively, the soft keyboard display command can also be generated by the image recognition module of the tablet to recognize a particular gesture action. Or the soft keyboard display command can also receive wireless signal generation from the tablet.

[0054] Further, the soft keyboard includes a preset soft keyboard and a hand-drawn soft keyboard. The preset soft keyboard is stored in the storage unit, and the hand-drawn soft keyboard is drawn by the user according to individual requirements, and is also saved in the storage unit after the drawing is completed. The preset soft keyboard and the hand-drawn soft keyboard can be referred to the above, and will not be described again here.

[0055] Alternatively, if a soft keyboard display instruction is not received, indicating that the user does not need a soft keyboard, the soft keyboard is hidden. The entire writing display is capable of writing operations, and the writing operation of the writing display receiving the writing pen produces a first writing signal. During the writing operation using the writing pen, the user's finger or palm is inevitably in contact with the writing display. To avoid accidental touch, the touch sensing function of the shielded writing display is set to receive only the writing operation of the writing pen.

[0056] Alternatively, if a soft keyboard display instruction is received, indicating that the user needs a soft keyboard, the writing display screen displays a soft keyboard, and the soft keyboard receives the key operation to generate a second writing signal. Alternatively, the display area of the soft keyboard can be the entire area or part of the writing display. In the display area of the soft keyboard is only a part of the writing display screen, you can set the input of the writing screen to receive the writing pen to prevent the writing pen from being accidentally touched. Or, the user is allowed to perform a key operation in the keyboard area, and the writing operation of the writing pen is received in the non-keyboard area, so that the keyboard input and the handwriting input can be satisfied at the same time. Preferably, the soft keyboard can receive a single key operation or a combined key operation, and the combined key operation includes a two-key combination operation and a multi-key combination operation. During the input combination operation, the writing display screen receives the key operation signals of two or more positions at the same time, correspondingly generating the combined key signals. The correspondence between the combined key operation and the combined key signal is pre-stored in the storage unit. Preferably, when a plurality of soft keyboards are stored in the storage unit, the soft keyboard can be switched by applying a plurality of soft keyboard display commands, thereby displaying the soft keyboard required by the user.

[0057] In some embodiments, after the writing display screen displays the soft keyboard, the method further includes the steps of: writing the display screen to receive soft The keyboard moves the command, and the soft keyboard moves to the position display corresponding to the soft keyboard movement command. For example, when the keyboard area is pressed for a long time, when the pressing time exceeds the preset time, a dotted line display or a color display appears on the edge of the soft keyboard, indicating that the movement operation can be performed. The user performs a sliding operation on the writing display screen to generate a soft keyboard movement instruction, and the soft keyboard correspondingly moves to the sliding operation end position display. Preferably, the location information of the moved soft keyboard is saved in the storage unit, and the subsequent soft keyboard can be displayed according to the location information.

[0058] In some embodiments, after the writing display screen displays the soft keyboard, the method further includes the steps of: the writing display screen receives the soft keyboard size adjustment instruction, and adjusts the display area of the soft keyboard on the writing display screen according to the soft keyboard size adjustment instruction, The buttons in the keyboard are scaled up or down. For example, when 吋 is pressed at the edge or top corner of the soft keyboard, the corresponding edge and apex angle display changes, such as dashed line display or color display, indicating that the keyboard zoom operation can be performed. The user performs a sliding operation on the writing display to generate a soft keyboard size adjustment command, and the soft keyboard performs corresponding enlargement or reduction display. Preferably, the scaled soft keyboard size is saved in the storage unit, and the subsequent soft keyboard can be displayed according to the size.

[0059] Referring to FIG. 5, it is a schematic diagram of a user identity authentication process of the tablet of the present invention.

[0060] In some embodiments, before the soft keyboard corresponding to the trajectory is formed by sensing the trajectory of the soft keyboard drawn by the user through the touch screen, the user identity authentication step is further included:

[0061] S31: The writing display screen receives the sliding operation of the user, and records the writing information corresponding to the sliding. Preferably, the writing of the writing information corresponding to the sliding comprises: recording a writing trajectory corresponding to the sliding and/or a writing pressure value, for example, the user inputs "Zhang San", and records the writing trajectory and the writing pressure value. It will be appreciated that the writing display includes a pressure sensor capable of collecting pressure during the writing process.

[0062] S32: Determine whether the written information matches the preset user information, and the preset user information needs to be pre-stored, and may be stored in the storage unit. Alternatively, it is only possible to determine whether the written trajectory matches the preset writing trajectory

. Further, in order to improve the security, it is possible to judge whether the writing trajectory and the writing pressure value match the preset writing trajectory and the preset writing pressure value.

[0063] S33: If the written information matches the preset user information, the authentication is passed. If only judge the writing track

, the writing track matches the preset writing track, and the authentication passes. If the peer determines the writing trajectory and the writing pressure value, the writing trajectory is required to match the preset writing trajectory, and the writing pressure value matches the preset writing pressure value, and if the two are satisfied, the authentication passes. [0064] The above authentication process can also be used as the authentication process of the tablet. For the specific process, refer to the above-mentioned user identity authentication process, and details are not described herein.

[0065] In summary, the tablet of the present invention can display and hide the soft keyboard, allows the user to manually draw a soft keyboard that conforms to his own usage habits, and can adjust the display position and size of the soft keyboard, and has various input modes to meet different users. Enter the requirements.

The above embodiments are merely illustrative of the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention without limiting the scope of the present invention. All changes and modifications made within the scope of the claims of the present invention are intended to be included within the scope of the appended claims.

Claims

Claim

[Claim 1] A tablet, comprising a touch screen for receiving a touch operation, wherein the touch screen senses a trajectory of a soft keyboard drawn by a user to form a soft keyboard corresponding to the trajectory; the soft keyboard is configured to receive a user The touch signal outputs the corresponding key value.

[Claim 2] The tablet according to claim 1, wherein the shape and arrangement of the soft keyboard are the same as the trajectory of the soft keyboard drawn by the user.

[Claim 3] The tablet according to claim 1, further comprising a paper attached on a surface of the touch screen, the user drawing a trajectory of the soft keyboard on the paper by using a writing pen, and forming a letter on the paper A soft keyboard drawn by the pen ink, the touch screen forming a soft keyboard corresponding to the soft keyboard of the ink drawing.

[Claim 4] The tablet of any of claims 1-3, further comprising a memory for storing the soft keyboard.

The tablet of any one of the preceding claims, further comprising a mode switching button for generating a mode switching signal; or the touch screen receiving the touch operation to generate a mode switching signal ;

The mode switching signal is for the tablet switching input mode, the input mode comprising a first input mode input using a stylus pen and a second input mode input using the soft keyboard.

The tablet of any one of claims 1 to 3, further comprising a wireless communication module for converting the key value into a wireless signal and transmitting the signal.

The tablet according to any one of claims 1 to 3, further comprising a light emitting layer attached to the lower surface of the touch screen, wherein the light emitting layer emits light after forming the soft keyboard, and displays The shape of the soft keyboard.

[Claim 8] The tablet according to claim 7, wherein the keys in the soft keyboard corresponding to the button operation after the soft keyboard receives the button operation display different colors.

[Claim 9] The tablet according to claim 1, wherein the drawing process of the soft keyboard comprises:

The touch screen senses a sliding operation applied by a user, and records a movement trajectory of the sliding operation Identifying and determining whether the moving track is a preset character;

If yes, recording the moving track as a character track, and establishing a correspondence between the character track and a preset character;

If not, the moving track is recorded as a button boundary;

The button boundary and the character track within the button boundary are combined into a button, and the plurality of buttons constitute the soft keyboard.

The tablet according to claim 9, wherein the recording of the movement trajectory of the sliding operation comprises:

The movement trajectory of the sliding operation is recorded by collecting touch screen contacts.

A tablet assembly, comprising the tablet according to any one of claims 1 to 10, further comprising a writing pen;

After receiving the pressing of the writing pen, the touch screen of the tablet obtains coordinate information of the pressing point.

The tablet assembly according to claim 11, wherein said writing pen comprises a wireless signal transmitting module for transmitting a wireless signal;

The tablet obtains position information of the pointing point of the writing pen according to the wireless signal transmitted by the writing pen, and obtains a button pointed by the writing pen according to the position information, and displays a button color of the button.

A writing method of a tablet, characterized in that the tablet includes a touch screen for receiving a touch operation, and the method comprises the following steps:

Forming a soft keyboard corresponding to the track by sensing the trajectory of the soft keyboard drawn by the user through the touch screen

The user's touch signal is received through the soft keyboard and the corresponding key value is output.

The writing method of the tablet according to claim 13, wherein the shape and arrangement of the soft keyboard are the same as the trajectory of the soft keyboard drawn by the user.

The writing method of the tablet according to claim 13, further comprising: a paper attached on a surface of the touch screen; and a soft keyboard corresponding to the track formed by sensing a trajectory of the soft keyboard drawn by the user through the touch screen; : The user draws a trajectory of the soft keyboard on the paper by using a writing pen, and a soft keyboard drawn by the writing pen ink is formed on the paper, and the touch screen forms a soft keyboard corresponding to the soft keyboard drawn by the ink.

The writing method of the tablet according to claim 13, wherein the soft keyboard corresponding to the trajectory is formed by sensing the trajectory of the soft keyboard drawn by the user by the touch screen, and the method comprises: the touch screen sensing the user An applied sliding operation, recording a movement trajectory of the sliding operation, and identifying and determining whether the movement trajectory is a preset character;

If not, the moving track is recorded as a button boundary;

[Claim 17] The writing method of the tablet according to claim 13, wherein before the soft keyboard corresponding to the trajectory is formed by sensing the trajectory of the soft keyboard drawn by the user through the touch screen, the user identity authentication step is further included. :

The touch screen receives a sliding operation of the user, and records the writing information corresponding to the sliding operation to determine whether the writing information matches the preset user information; if yes, the authentication passes.

The writing method of the writing board according to claim 17, wherein the recording of the writing information corresponding to the sliding operation comprises: recording a writing trajectory and a writing pressure value corresponding to the sliding operation;

The determining whether the writing information matches the preset user information comprises: determining whether the writing trajectory and the writing pressure value match the preset writing trajectory and the preset writing pressure value.