CN111338552B - Chalk handwriting writing method and device and electronic equipment - Google Patents
Chalk handwriting writing method and device and electronic equipment Download PDFInfo
- Publication number
- CN111338552B CN111338552B CN201910054591.3A CN201910054591A CN111338552B CN 111338552 B CN111338552 B CN 111338552B CN 201910054591 A CN201910054591 A CN 201910054591A CN 111338552 B CN111338552 B CN 111338552B
- Authority
- CN
- China
- Prior art keywords
- touch point
- touch
- chalk
- points
- writing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
The invention discloses a method and a device for writing chalk handwriting and electronic equipment, wherein the method comprises the following steps: detecting an input touch signal; processing the touch signal to generate touch point path information; determining the number of touch points on a touch point path according to the touch point path information, and calculating the simulated friction force of each touch point; determining chalk writing information according to the touch point path information and the simulated friction force of each touch point; and drawing the chalk writing effect according to the chalk writing information. The invention can realize the writing effect of chalk handwriting and enrich the display effect.
Description
Technical Field
The invention relates to the technical field of touch software, in particular to a chalk writing method and device and electronic equipment.
Background
Touch input devices such as touch screens and electronic whiteboards are increasingly widely applied in daily life, and touch input software can realize functions of handwriting input, editing and the like. The existing touch input equipment can generally recognize the touch signal of a touch pen with a single pen point and display corresponding handwriting, and the writing effect of chalk handwriting cannot be realized.
Disclosure of Invention
In view of this, the invention aims to provide a method and a device for writing chalk writing and electronic equipment, which can achieve the writing effect of the chalk writing and enrich the display effect.
Based on the above purpose, the invention provides a chalk writing method, which comprises the following steps:
detecting an input touch signal;
processing the touch signal to generate touch point path information;
determining the number of touch points on a touch point path according to the touch point path information, and calculating the simulated friction force of each touch point;
determining chalk writing information according to the touch point path information and the simulated friction force of each touch point;
and drawing the chalk writing effect according to the chalk writing information.
Optionally, the touch point path information includes position coordinates of consecutive touch points, the number of the touch points, a timestamp of each touch point, and a distance between two consecutive touch points.
Optionally, the calculation formula of the simulated friction force is as follows:
f is the simulated friction, σ is the adhesion coefficient, p is the touch point identifier, p is 1,2, … … n, n is the number of touch points, d is the distance between the current touch point and the previous touch point, and e is the friction reference coefficient.
Optionally, the chalk writing information includes position coordinates of the touch points on the touch point path, timestamps of the touch points, simulated friction of the touch points, the number of the touch points with the chalk effect, and the area of the touch points with the chalk effect.
Optionally, when the simulated friction force of the touch point is smaller than the powder particle adhesion force limit, the position of the touch point displays a spot of the bottom color of the blackboard, wherein the powder particle adhesion force limit is F × σ × epsilon.
The embodiment of the invention also provides a device for writing chalk handwriting, which comprises:
the detection module is used for detecting an input touch signal;
the touch information processing module is used for processing the touch signal and generating touch point path information;
the calculation module is used for determining the number of touch points on a touch point path according to the touch point path information and calculating the simulated friction of each touch point;
the handwriting information processing module is used for processing and generating chalk handwriting information according to the touch point path information and the simulated friction force of each touch point;
and the drawing module is used for drawing the writing effect of the chalk handwriting according to the chalk handwriting information.
Optionally, the touch point path information includes position coordinates of consecutive touch points, the number of the touch points, a timestamp of each touch point, and a distance between two consecutive touch points.
Optionally, the formula for calculating the simulated friction force by the calculation module is as follows:
f is the simulated friction, σ is the adhesion coefficient, p is the touch point identifier, p is 1,2, … … n, n is the number of touch points, d is the distance between the current touch point and the previous touch point, and e is the friction reference coefficient.
Optionally, the chalk writing information includes position coordinates of the touch points on the touch point path, timestamps of the touch points, simulated friction of the touch points, the number of the touch points with the chalk effect, and the area of the touch points with the chalk effect.
Optionally, when the simulated friction force of the touch point is smaller than the powder particle adhesion force limit, the position of the touch point displays a spot of the bottom color of the blackboard, wherein the powder particle adhesion force limit is F × σ × epsilon.
The embodiment of the invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the chalk writing method when executing the program.
From the above, the method, the device and the electronic equipment for writing the chalk handwriting provided by the invention detect the input touch signal; processing the touch signal to generate touch point path information; determining the number of touch points on a touch point path, and calculating the simulated friction of each touch point; determining chalk writing information according to the path information of the touch points and the simulated friction force of each touch point; and drawing the chalk writing effect according to the chalk writing information. The invention can realize the writing effect of chalk handwriting and enrich the display effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention. As shown in the figure, the method for writing chalk handwriting provided by the embodiment of the invention comprises the following steps:
s10: detecting an input touch signal;
when a finger or a touch pen interacts with the touch input device, touch signals are generated, including signals of the position, time, width, height, pressure and the like of a touch point.
S11: processing the touch signal to generate touch point path information;
and processing the touch signal to generate touch information, wherein the touch information comprises touch point position coordinates, touch point timestamps, time difference between touch points, touch point width, touch point paths and the like, and the touch point paths are determined by continuous touch point position coordinates and touch point timestamps.
And determining touch point path information according to the touch information, wherein the touch point path information comprises continuous touch point position coordinates, the number of touch points, timestamps of the touch points, the distance between two continuous touch points, the time difference between the two continuous touch points and the like, the distance between the two continuous touch points is calculated according to the position coordinates of the two continuous touch points, and the time difference between the two continuous touch points is the difference value of the timestamps of the two continuous touch points.
S12: determining the number of touch points on a touch point path according to the touch point path information, and calculating the simulated friction force of each touch point;
according to the following formula:
the calculation formula of the obtained simulated friction force is as follows:
wherein, F is an adhesive force, i.e. a simulated friction force, σ is an adhesive force coefficient, p is a touch point identifier, p is 1,2, … … n, n is the number of touch points, d is a distance between a current touch point and a previous touch point, and has a value range of 2 to 4 micrometers, and e is a friction reference coefficient and has a value range of 0.03 to 0.07. The specific values of the parameters sigma, d and epsilon can be set according to the actual effect of simulating chalk writing. In one embodiment, epsilon may be 0.045.
S13: determining chalk writing information according to the touch point path information and the simulated friction force of each touch point obtained through calculation;
the chalk writing information comprises position coordinates of each touch point on a touch point path, a timestamp of each touch point, a simulation friction force of each touch point, the number of touch points with a chalk effect and the area of the touch points with the chalk effect. In order to simulate the chalk effect, the area of the touch points with the chalk effect can be 0.2-0.3 square millimeter, and the distribution density of the touch points with the chalk effect is 2-4 per square millimeter.
In the embodiment of the invention, in order to simulate the dropping effect of the chalk powder, according to the simulated friction force F obtained by calculation, when the simulated friction force F of the touch point is smaller than the adhesive force limit (F multiplied by sigma multiplied by epsilon), the position of the touch point simulates the dropping of the chalk powder and displays the spots of the bottom color of the blackboard, the area of the spots is 0.001-0.002 square millimeter, the area of the spots is 2% of the width of a writing pen, and meanwhile, the position of the touch point simulates the gravity drifting effect of the chalk powder (which can be realized by OPENGL software and a gravity algorithm).
S14: and drawing according to the determined chalk writing information and displaying the chalk writing effect.
Fig. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present invention. As shown in the drawings, the device for writing chalk handwriting provided by the embodiment of the invention comprises:
the detection module is used for detecting an input touch signal;
when a finger or a touch pen interacts with the touch input device, touch signals are generated, including signals of the position, time, width, height, pressure and the like of a touch point.
The touch information processing module is used for processing the touch signal and generating touch point path information;
and processing the touch signal to generate touch information, wherein the touch information comprises touch point position coordinates, touch point timestamps, time difference between touch points, touch point width, touch point paths and the like, and the touch point paths are determined by continuous touch point position coordinates and touch point timestamps. And determining touch point path information according to the touch information, wherein the touch point path information comprises continuous touch point position coordinates, the number of touch points, timestamps of the touch points and time difference of the two continuous touch points.
The calculation module is used for determining the number of touch points on a touch point path according to the touch point path information and calculating the simulated friction of each touch point;
the formula for calculating the simulated friction force is as follows:
wherein, F is an adhesive force, i.e. a simulated friction force, σ is an adhesive force coefficient, p is a touch point identifier, p is 1,2, … … n, n is the number of touch points, d is a distance between a current touch point and a previous touch point, and has a value range of 2 to 4 micrometers, and e is a friction reference coefficient and has a value range of 0.03 to 0.07. The specific values of the parameters sigma, d and epsilon can be set according to the actual effect of the mould chalk writing.
The handwriting information processing module is used for processing and generating chalk handwriting information according to the touch point path information and the simulated friction force of each touch point obtained through calculation;
the chalk writing information comprises position coordinates of each touch point on a touch point path, a timestamp of each touch point, a simulation friction force of each touch point, and the area of each touch point, wherein for simulating a chalk effect, the area of each touch point can be 0.2-0.3 square millimeters.
And the drawing module is used for drawing the writing effect of the chalk handwriting according to the chalk handwriting information.
According to the chalk writing method and device, the touch signals are detected, processed to generate touch information, the path information of the touch points is determined, the simulated friction force of each touch point on the path of the touch points is calculated, the chalk writing information is determined according to the path information of the touch points and the simulated friction force of each touch point, and the chalk writing effect is drawn based on the chalk writing information. The invention can simulate the writing effect of chalk handwriting and enrich the writing effect function of the electronic whiteboard.
In view of the above object, the embodiment of the present invention further provides an embodiment of an apparatus for executing the method for writing chalk writing. The device comprises:
one or more processors, and a memory.
The device for executing the chalk writing method can further comprise the following steps: an input device and an output device.
The processor, memory, input device, and output device may be connected by a bus or other means.
The memory, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the chalk writing method in the embodiments of the present invention. The processor executes various functional applications and data processing of the server by running the nonvolatile software program, instructions and modules stored in the memory, namely, the chalk writing method of the above method embodiment is realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created from use of an apparatus that performs the chalk writing method, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory optionally includes memory remotely located from the processor, and these remote memories may be connected to the member user behavior monitoring device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device may receive input numeric or character information and generate key signal inputs related to user settings and function controls of the device performing the chalk writing method. The output device may include a display device such as a display screen.
The one or more modules are stored in the memory and, when executed by the one or more processors, perform the chalk writing method of any of the above method embodiments. The technical effect of the embodiment of the device for executing the chalk writing method is the same as or similar to that of any method embodiment.
The embodiment of the invention also provides a non-transitory computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the processing method of the list item operation in any method embodiment. Embodiments of the non-transitory computer storage medium may be the same or similar in technical effect to any of the method embodiments described above.
Finally, it should be noted that, as will be understood by those skilled in the art, all or part of the processes in the methods of the above embodiments may be implemented by a computer program that can be stored in a computer-readable storage medium and that, when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like. The technical effect of the embodiment of the computer program is the same as or similar to that of any of the method embodiments described above.
Furthermore, the apparatuses, devices, etc. described in the present disclosure may be various electronic terminal devices, such as a mobile phone, a Personal Digital Assistant (PDA), a tablet computer (PAD), a smart television, etc., and may also be large terminal devices, such as a server, etc., and therefore the scope of protection of the present disclosure should not be limited to a specific type of apparatus, device. The client disclosed by the present disclosure may be applied to any one of the above electronic terminal devices in the form of electronic hardware, computer software, or a combination of both.
Furthermore, the method according to the present disclosure may also be implemented as a computer program executed by a CPU, which may be stored in a computer-readable storage medium. The computer program, when executed by the CPU, performs the above-described functions defined in the method of the present disclosure.
Further, the above method steps and system elements may also be implemented using a controller and a computer readable storage medium for storing a computer program for causing the controller to implement the functions of the above steps or elements.
Further, it should be appreciated that the computer-readable storage media (e.g., memory) described herein can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. By way of example, and not limitation, nonvolatile memory can include Read Only Memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which can act as external cache memory. By way of example and not limitation, RAM is available in a variety of forms such as synchronous RAM (DRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The storage devices of the disclosed aspects are intended to comprise, without being limited to, these and other suitable types of memory.
The apparatus of the foregoing embodiment is used to implement the corresponding method in the foregoing embodiment, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the invention. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (11)
1. A method for writing by chalk handwriting is characterized by comprising the following steps:
detecting an input touch signal;
processing the touch signal to generate touch point path information; the touch point path information comprises position coordinates of continuous touch points;
determining the number of touch points on a touch point path and the distance between two continuous touch points according to the position coordinates of the touch points;
calculating the simulated friction force of each touch point according to the distance between two continuous touch points;
determining chalk writing information according to the position coordinates and the simulated friction force of each touch point;
and drawing the chalk writing effect according to the chalk writing information.
2. The method of claim 1, wherein the touch point path information further comprises a time stamp of the touch point.
3. The method of claim 2,
the calculation formula of the simulated friction force is as follows:
f is the simulated friction, σ is the adhesion coefficient, p is the touch point identifier, p is 1,2, … … n, n is the number of touch points, d is the distance between the current touch point and the previous touch point, and e is the friction reference coefficient.
4. The method according to claim 3, wherein the chalk writing information comprises position coordinates of the touch point on the touch point path, a timestamp of the touch point, a simulated friction force of the touch point, the number of touch points of the chalk effect, and an area of the touch points of the chalk effect.
5. The method of claim 3, wherein the location of the touch point shows a spot of a blackboard ground color when the simulated friction of the touch point is less than a powder particle adhesion limit, wherein the powder particle adhesion limit is F x σ x ε.
6. A chalk writing device, comprising:
the detection module is used for detecting an input touch signal;
the touch information processing module is used for processing the touch signal and generating touch point path information; the touch point path information comprises position coordinates of continuous touch points;
the calculation module is used for determining the number of touch points on a touch point path and the distance between two continuous touch points according to the position coordinates of the touch points; calculating the simulated friction force of each touch point according to the distance between two continuous touch points;
the handwriting information processing module is used for processing and generating chalk handwriting information according to the position coordinates and the simulated friction force of each touch point;
and the drawing module is used for drawing the writing effect of the chalk handwriting according to the chalk handwriting information.
7. The apparatus of claim 6, wherein the touch point path information further comprises a time stamp of the touch point.
8. The apparatus of claim 7,
the formula for calculating the simulated friction force by the calculation module is as follows:
f is the simulated friction, σ is the adhesion coefficient, p is the touch point identifier, p is 1,2, … … n, n is the number of touch points, d is the distance between the current touch point and the previous touch point, and e is the friction reference coefficient.
9. The apparatus according to claim 8, wherein the chalk writing information comprises position coordinates of the touch point on the touch point path, a timestamp of the touch point, a simulated friction of the touch point, a number of touch points of the chalk effect, and an area of the touch points of the chalk effect.
10. The apparatus of claim 8, wherein the location of the touch point shows a spot of a blackboard ground color when the simulated friction of the touch point is less than a powder particle adhesion limit, wherein the powder particle adhesion limit is F x σ x ∈.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 5 when executing the program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054591.3A CN111338552B (en) | 2019-01-21 | 2019-01-21 | Chalk handwriting writing method and device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054591.3A CN111338552B (en) | 2019-01-21 | 2019-01-21 | Chalk handwriting writing method and device and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111338552A CN111338552A (en) | 2020-06-26 |
| CN111338552B true CN111338552B (en) | 2022-03-25 |
Family
ID=71181891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910054591.3A Active CN111338552B (en) | 2019-01-21 | 2019-01-21 | Chalk handwriting writing method and device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111338552B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113934315B (en) * | 2020-07-13 | 2023-10-20 | 深圳市创易联合科技有限公司 | Display method based on electronic board, electronic board and computer storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533330A (en) * | 2008-03-10 | 2009-09-16 | Lg电子株式会社 | Terminal and method of controlling the same |
| CN202383642U (en) * | 2011-12-30 | 2012-08-15 | 陈双 | Electronic blackboard |
| CN102789325A (en) * | 2011-05-20 | 2012-11-21 | 索尼公司 | Stylus based haptic peripheral for touch screen and tablet devices |
| CN102881196A (en) * | 2012-06-04 | 2013-01-16 | 东莞市沃德电子科技有限公司 | Electronic lecturing system |
| CN104951125A (en) * | 2014-03-28 | 2015-09-30 | 三星显示有限公司 | System and method for generating haptic feedback in stylus |
| CN105185176A (en) * | 2015-10-28 | 2015-12-23 | 闫健 | Wireless handheld device for information-based teaching |
| CN105807993A (en) * | 2016-03-04 | 2016-07-27 | 上海浩元集成系统有限公司 | Multimedia interactive electronic art blackboard poster |
| CN105867660A (en) * | 2016-04-16 | 2016-08-17 | 向大凤 | Electronic chalk |
| CN107443973A (en) * | 2017-08-08 | 2017-12-08 | 安徽状元郎电子科技有限公司 | A kind of double deck type interaction blackboard |
| CN208335168U (en) * | 2018-02-02 | 2019-01-04 | 姚苏栩 | Chalk-writing original person's handwriting saves system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203681056U (en) * | 2013-12-20 | 2014-07-02 | 青岛黄海学院 | Multi-functional chalk sleeve |
| EP3120223A1 (en) * | 2014-03-21 | 2017-01-25 | Immersion Corporation | System, method and computer-readable medium for force-based object manipulation and haptic sensations |
-
2019
- 2019-01-21 CN CN201910054591.3A patent/CN111338552B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533330A (en) * | 2008-03-10 | 2009-09-16 | Lg电子株式会社 | Terminal and method of controlling the same |
| CN102789325A (en) * | 2011-05-20 | 2012-11-21 | 索尼公司 | Stylus based haptic peripheral for touch screen and tablet devices |
| CN202383642U (en) * | 2011-12-30 | 2012-08-15 | 陈双 | Electronic blackboard |
| CN102881196A (en) * | 2012-06-04 | 2013-01-16 | 东莞市沃德电子科技有限公司 | Electronic lecturing system |
| CN104951125A (en) * | 2014-03-28 | 2015-09-30 | 三星显示有限公司 | System and method for generating haptic feedback in stylus |
| CN105185176A (en) * | 2015-10-28 | 2015-12-23 | 闫健 | Wireless handheld device for information-based teaching |
| CN105807993A (en) * | 2016-03-04 | 2016-07-27 | 上海浩元集成系统有限公司 | Multimedia interactive electronic art blackboard poster |
| CN105867660A (en) * | 2016-04-16 | 2016-08-17 | 向大凤 | Electronic chalk |
| CN107443973A (en) * | 2017-08-08 | 2017-12-08 | 安徽状元郎电子科技有限公司 | A kind of double deck type interaction blackboard |
| CN208335168U (en) * | 2018-02-02 | 2019-01-04 | 姚苏栩 | Chalk-writing original person's handwriting saves system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111338552A (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2021103555A (en) | Image detection method, device, electronic apparatus, storage medium, and program | |
| CN107609122B (en) | Advertisement shielding rule updating method, device, server and storage medium | |
| US11513753B2 (en) | Data processing method and electronic terminal | |
| CN111352599A (en) | Data processing method and device for remote whiteboard and electronic equipment | |
| CN109213413A (en) | A kind of recommended method, device, equipment and storage medium | |
| CN105872542A (en) | Image compression method and device and electronic equipment | |
| CN105357204A (en) | Method and apparatus for generating terminal identifying information | |
| CN104598121A (en) | Picture zooming method and device | |
| CN111381790A (en) | Control method, device and system, electronic whiteboard and mobile terminal | |
| CN111782131A (en) | Pen point implementation method, device, equipment and readable storage medium | |
| CN111338552B (en) | Chalk handwriting writing method and device and electronic equipment | |
| CN103558989A (en) | Content typesetting method and mobile terminal | |
| CN114740996A (en) | Signal acquisition method and electronic equipment | |
| CN112487871B (en) | Handwriting data processing method and device and electronic equipment | |
| CN104067308A (en) | Object selection in an image | |
| CN104281562A (en) | Electronic document processing method and device | |
| CN111158505A (en) | Thick-thin handwriting writing method and device and electronic equipment | |
| CN111027344B (en) | Display method and device | |
| CN104572598A (en) | Typesetting method and device for digitally published product | |
| CN111158569A (en) | Erasing operation method and device and electronic equipment | |
| CN109922359B (en) | User processing method, device, equipment and storage medium | |
| CN111324273A (en) | Media display implementation method and device | |
| CN111352563A (en) | Content deleting method of interactive service and related equipment | |
| CN107943396B (en) | Parameter adjusting method and device, computer device and readable storage medium | |
| CN110018771B (en) | Information display method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |