CN113934394A - Method and device for realizing memory display in display screen and terminal equipment - Google Patents

Method and device for realizing memory display in display screen and terminal equipment Download PDF

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Publication number
CN113934394A
CN113934394A CN202111215378.XA CN202111215378A CN113934394A CN 113934394 A CN113934394 A CN 113934394A CN 202111215378 A CN202111215378 A CN 202111215378A CN 113934394 A CN113934394 A CN 113934394A
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display
blackboard
display screen
writing
content
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CN113934394B (en
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何晓勇
夏炳坤
李亚军
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Hebei Shida Education Technology Co ltd
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Hebei Shida Education Technology Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • 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
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

The invention provides a method, a device and terminal equipment for realizing memory display in a display screen. The method comprises the following steps: detecting a display mode of a display screen; the display mode is synchronous display or asynchronous display; if the display mode of the display screen is asynchronous display, the display content of the display screen is kept unchanged, and when the display mode of the display screen is switched from asynchronous display to synchronous display, the target blackboard-writing content is displayed in the display screen; the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display. The invention can realize the asynchronous transmission of the blackboard-writing content, so that the intelligent blackboard and the display screen can display different contents, thereby realizing the multi-content display teaching.

Description

Method and device for realizing memory display in display screen and terminal equipment
Technical Field
The invention relates to the technical field of intelligent blackboards, in particular to a method and a device for realizing memory display in a display screen and terminal equipment.
Background
The intelligent blackboard can be also called as an intelligent classroom interactive blackboard, and can combine a traditional handwriting blackboard with multimedia equipment by adopting a touch technology, so that the content of blackboard writing is displayed on a display screen, and the intelligent blackboard is convenient for students to watch.
At present, the blackboard writing content of the intelligent blackboard can be transmitted to the display screen in real time for displaying, so that the blackboard writing content of the intelligent blackboard is consistent with the display content of the display screen. However, this approach has limited content to display, resulting in the inability to implement multi-content display tutorials.
Disclosure of Invention
The embodiment of the invention provides a method, a device and terminal equipment for realizing memory display in a display screen, and aims to solve the problem that multi-content display teaching cannot be realized in the prior art.
In a first aspect, an embodiment of the present invention provides a method for implementing memory display in a display screen, including:
detecting a display mode of a display screen; the display mode is synchronous display or asynchronous display;
if the display mode of the display screen is asynchronous display, the display content of the display screen is kept unchanged, and when the display mode of the display screen is switched from asynchronous display to synchronous display, the target blackboard-writing content is displayed in the display screen;
the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display.
In a possible implementation manner, when the display mode of the display screen is switched from asynchronous display to synchronous display, the method for implementing memory display in the display screen further includes:
receiving target blackboard writing coordinate information sent by an intelligent blackboard, and converting the target blackboard writing coordinate information into target blackboard writing content;
and the target writing coordinate information is writing coordinate information corresponding to the target writing content.
In a possible implementation manner, if the display manner of the display screen is asynchronous display, the method for implementing memory display in the display screen further includes:
receiving real-time blackboard writing coordinate information sent by an intelligent blackboard, and converting the real-time blackboard writing coordinate information into real-time blackboard writing content;
the target blackboard-writing content comprises all real-time blackboard-writing contents when the display mode of the display screen is asynchronous display.
In a possible implementation manner, if the display manner of the display screen is asynchronous display, the method for implementing memory display in the display screen further includes:
receiving real-time blackboard writing coordinate information sent by an intelligent blackboard;
when the display mode of the display screen is switched from asynchronous display to synchronous display, the method for realizing memory display in the display screen further comprises the following steps:
and converting all the received real-time blackboard-writing coordinate information into target blackboard-writing contents.
In one possible implementation, displaying the target blackboard-writing content in a display screen includes:
if the position of the target blackboard-writing content is overlapped with the position of the first display content, only the target blackboard-writing content is displayed in the display screen;
if the position of the target blackboard-writing content is not overlapped with the position of the first display content, the target blackboard-writing content and the first display content are displayed in the display screen at the same time, or only the target blackboard-writing content is displayed in the display screen;
the first display content is the display content of the display screen when the display mode of the display screen is asynchronous display.
In a possible implementation manner, after detecting the display manner of the display screen, the method for implementing the memory display in the display screen further includes:
and if the display mode of the display screen is synchronous display, keeping the display content of the display screen consistent with the blackboard-writing content of the intelligent blackboard.
In a second aspect, an embodiment of the present invention provides an apparatus for implementing memory display in a display screen, including:
the detection module is used for detecting the display mode of the display screen; the display mode is synchronous display or asynchronous display;
the asynchronous display module is used for keeping the display content of the display screen unchanged if the display mode of the display screen is asynchronous display, and displaying the target blackboard-writing content in the display screen when the display mode of the display screen is switched from asynchronous display to synchronous display;
the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display.
In one possible implementation, the asynchronous display module is further configured to:
when the display mode of the display screen is switched from asynchronous display to synchronous display, receiving target blackboard-writing coordinate information sent by the intelligent blackboard, and converting the target blackboard-writing coordinate information into target blackboard-writing content;
and the target writing coordinate information is writing coordinate information corresponding to the target writing content.
In a third aspect, an embodiment of the present invention provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements, when executing the computer program, the steps of the method for implementing memory display in a display screen according to the first aspect or any one of the possible implementation manners of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for implementing a memory display in a display screen according to the first aspect or any one of the possible implementation manners of the first aspect.
The embodiment of the invention provides a method, a device and a terminal device for realizing memory display in a display screen, wherein when the display mode of the display screen is asynchronous display, the display content of the display screen is kept unchanged, and when the display mode of the display screen is switched from asynchronous display to synchronous display, the target writing content is displayed in the display screen, and when the display mode of the display screen is asynchronous display, the target writing content is newly added on an intelligent blackboard, so that the asynchronous transmission of the writing content can be realized, different contents are displayed on the intelligent blackboard and the display screen, and the multi-content display teaching can be realized.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a system for implementing memory display in a display screen according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an implementation of a method for implementing a memory display in a display screen according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of neighborhood points of sampling points according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of left and right neighborhood points of a sampling point in a vertical blackboard writing coordinate set according to an embodiment of the present invention;
FIG. 5 is a diagram of upper neighborhood points and lower neighborhood points of sampling points in a lateral blackboard writing coordinate set according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an apparatus for implementing a memory display in a display screen according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of a system for implementing memory display in a display screen provided in an embodiment of the present invention is shown, where the system includes an intelligent blackboard and a display screen.
The writer can write the blackboard writing content on the intelligent blackboard, and the intelligent blackboard can acquire handwriting coordinate information of the blackboard writing content and send the acquired handwriting coordinate information to the display screen. The handwriting coordinate information may include a series of coordinates arranged in time order.
The display screen can convert the received handwriting coordinate information into corresponding blackboard writing content, and the blackboard writing content is displayed, so that the display screen can display the blackboard writing content of the intelligent blackboard, and all the personnel in the classroom can conveniently check the blackboard writing content.
The number of the display screens can be one or more, and when the number of the display screens is multiple, the display screens can be arranged at different positions in a classroom, so that all people in the classroom can clearly view blackboard writing contents.
Referring to fig. 2, it shows an implementation flowchart of a method for implementing memory display in a display screen according to an embodiment of the present invention. The execution main body of the method for realizing memory display in the display screen can be terminal equipment, and the terminal equipment can be the display screen.
In a possible implementation manner, the intelligent blackboard and the display screen are connected through the terminal device, and communication between the intelligent blackboard and the display screen needs to pass through the terminal device.
Referring to fig. 1, the method for implementing memory display in the display screen is detailed as follows:
in S101, detecting a display mode of a display screen; the display mode is synchronous display or asynchronous display.
In this embodiment, the display mode of the display screen can be divided into synchronous display and asynchronous display.
The synchronous display means that the display content of the display screen is consistent with the current writing content of the intelligent blackboard, namely what content is written on the intelligent blackboard, and what content is displayed on the display screen.
The display content of the display screen is not consistent with the current blackboard-writing content of the intelligent blackboard through asynchronous display, the display content of the display screen is kept unchanged when the blackboard-writing content of the intelligent blackboard is changed during asynchronous display, and the newly added blackboard-writing content of the intelligent blackboard during the asynchronous display period can be displayed by the display screen when the asynchronous display is converted into synchronous display.
In this embodiment, a synchronous display control and an asynchronous display control may be set on the display screen, and/or a synchronous display control and an asynchronous display control may be set on the intelligent blackboard. The writer may implement the synchronous display by selecting the synchronous display control or the asynchronous display by selecting the asynchronous display control.
In S102, if the display mode of the display screen is asynchronous display, maintaining the display content of the display screen unchanged, and displaying the target blackboard-writing content in the display screen when the display mode of the display screen is switched from asynchronous display to synchronous display;
the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display.
In this embodiment, during the display mode of the display screen is asynchronous display, the display content of the display screen remains unchanged, and when the display mode of the display screen is switched from asynchronous display to synchronous display, the display content of the display screen is displayed according to the changed content of the intelligent blackboard, that is, the display screen can display the newly added blackboard-writing content of the intelligent blackboard during the display mode of the display screen is asynchronous display.
In the embodiment, when the display mode of the display screen is asynchronous display, the display content of the display screen is kept unchanged, and when the display mode of the display screen is switched from asynchronous display to synchronous display, the target writing content is displayed in the display screen, and when the display mode of the display screen is asynchronous display, the target writing content is newly added on the intelligent blackboard, so that asynchronous transmission of the writing content can be realized, the intelligent blackboard and the display screen display different contents, and multi-content display teaching can be realized.
The multi-content display teaching can be understood as a teaching mode when one display screen is not enough to display all teaching contents corresponding to a knowledge point when the explanation contents corresponding to the knowledge point are more. For example, when a teacher explains a knowledge point, more contents need to be written, however, one display screen cannot display all the writing contents corresponding to the knowledge point, and at this time, the intelligent blackboard and the display screen can be combined to display all the writing contents corresponding to the knowledge point. For example, synchronous display can be selected firstly, so that the content of the intelligent blackboard is consistent with the display content of the display screen, asynchronous display is selected when the display screen is full, at the moment, the display content of the display screen is unchanged, the intelligent blackboard can erase the current content and rewrite new content, and therefore the knowledge point can be explained by combining the display content of the display screen and the blackboard-writing content of the intelligent blackboard, and multi-content display teaching is achieved.
In one possible implementation manner, when the display mode of the display screen is switched from asynchronous display to synchronous display, the blackboard-writing content of the current intelligent blackboard is displayed in the display screen.
During the display mode of the display screen is asynchronous display, if the writing contents of the intelligent blackboard are written in a covering mode at least once, namely after the writing contents of the intelligent blackboard are written fully, the writing contents are erased, and the writing on the intelligent blackboard is restarted, namely covering writing is carried out, at the moment, the display screen cannot display all the writing contents of the intelligent blackboard, and only the writing contents of the current intelligent blackboard can be displayed.
In some embodiments, in S102, when the display mode of the display screen is switched from asynchronous display to synchronous display, the method for implementing memory display in the display screen further includes:
receiving target blackboard writing coordinate information sent by an intelligent blackboard, and converting the target blackboard writing coordinate information into target blackboard writing content;
and the target writing coordinate information is writing coordinate information corresponding to the target writing content.
In this embodiment, the intelligent blackboard can acquire the writing coordinates of the blackboard writing in real time, but the writing coordinates are not sent to the display screen during the asynchronous display period until the display mode of the display screen is switched from asynchronous display to synchronous display, and the display mode of the display screen is sent to the display screen from all writing coordinates (namely, target writing coordinate information) acquired during the asynchronous display period.
The display screen does not receive information of the intelligent blackboard when the display mode of the display screen is asynchronous display, receives target blackboard-writing coordinate information sent by the intelligent blackboard when the display mode of the display screen is switched from asynchronous display to synchronous display, converts the target blackboard-writing coordinate information into target blackboard-writing content by adopting the conventional method or the method provided by the following method, and displays the target blackboard-writing content in the display screen.
In one possible implementation, the target writing script coordinate information includes writing script coordinates of a plurality of sampling points; converting the target writing coordinate information into the target writing content may include the following steps:
the method comprises the following steps: and dividing the sampling points according to the writing coordinates of the blackboard writing corresponding to the plurality of sampling points to obtain a transverse writing coordinate set and a longitudinal writing coordinate set.
The intelligent blackboard is provided with a sampling device, the sampling device can collect relevant information of the blackboard writing handwriting in real time according to time sequence, and then the collected relevant information of the blackboard writing handwriting is sent to the display screen through communication. The relevant information of the blackboard writing can be the coordinates of the blackboard writing of a plurality of sampling points with time sequence relation.
For an intelligent blackboard, the blackboard writing handwriting sampling can be carried out in the writing process of a writer. If the distance between the writing tool and the blackboard surface exceeds a preset induction threshold value, sampling is not carried out; and if the distance between the writing tool and the blackboard surface does not exceed the preset induction threshold value, sampling. And sampling to obtain the blackboard writing coordinates of a plurality of sampling points with time sequence information.
Optionally, the blackboard writing handwriting can be divided into horizontal handwriting and vertical handwriting, and correspondingly, the blackboard writing handwriting coordinate lines corresponding to the multiple sampling points can also be divided into a horizontal blackboard writing coordinate set and a vertical blackboard writing coordinate set.
The board writing coordinates corresponding to the sampling points can be judged to belong to the transverse board writing coordinates or the longitudinal board writing coordinates according to the time sequence, the horizontal coordinates and the vertical coordinates among the board writing coordinates. The set of lateral blackboard writing coordinates may include zero or at least one lateral blackboard writing coordinate, and the set of longitudinal blackboard writing coordinates may include zero or at least one longitudinal blackboard writing coordinate.
For example, the blackboard writing "three" may include only the lateral blackboard writing coordinates, the blackboard writing "chuan" may include only the longitudinal blackboard writing coordinates, and the blackboard writing "feng" may include both the lateral blackboard writing coordinates and the longitudinal blackboard writing coordinates. The same principle is applied to other writing scripts.
Step two: and aiming at each sampling point, determining a left neighborhood point, a right neighborhood point, an upper neighborhood point and a lower neighborhood point corresponding to the sampling point according to the writing coordinates of the blackboard writing corresponding to the sampling point.
Fig. 3 is a schematic diagram of neighborhood points of the sampling point provided in this embodiment. As shown in fig. 3, the sampling point a includes a left neighborhood point a1, a right neighborhood point a2, an upper neighborhood point A3, and a lower neighborhood point a 4.
Specifically, a sampling point may be expanded to a neighborhood, an upper neighborhood point and a lower neighborhood point are determined according to an abscissa of a blackboard writing coordinate corresponding to the sampling point, and a left neighborhood point and a right neighborhood point are determined according to an ordinate of the blackboard writing coordinate corresponding to the sampling point.
Step three: and determining the longitudinal blackboard writing handwriting of the blackboard writing according to the left neighborhood point and the right neighborhood point of the sampling point in the longitudinal blackboard writing coordinate set.
Fig. 4 is a schematic diagram of left and right neighborhood points of the sampling points in the vertical blackboard writing coordinate set provided by the embodiment. As shown in FIG. 4, the vertical blackboard writing coordinate set includes sample point A and sample point B. For sample point a, it includes left neighborhood point a1 and right neighborhood point a 2; for sample point B, it includes left neighborhood point B1 and right neighborhood point B2.
For example, assuming that the longitudinal blackboard writing coordinate set only includes a sampling point a and a sampling point B, by using a bezier curve or other trajectory positioning curves, the left neighborhood point a1 and the left neighborhood point B1 may be connected, the right neighborhood point B1 and the right neighborhood point B2 may be connected, the left neighborhood point a1 and the right neighborhood point a2 may be connected, and the left neighborhood point B1 and the right neighborhood point B2 may be connected to form a simple closed region, so that the blackboard writing of the sampling point a and the sampling point B may be simulated without considering the falling points of the initial starting pen and the ending pen.
Step four: and determining the transverse blackboard writing handwriting of the blackboard writing according to the upper neighborhood point and the lower neighborhood point of the sampling point in the transverse blackboard writing coordinate set.
Fig. 5 is a schematic diagram of upper neighborhood points and lower neighborhood points of sampling points in the lateral blackboard writing coordinate set provided by the embodiment. As shown in FIG. 5, the set of lateral blackboard writing coordinates includes sample point C and sample point D. For sample point C, it includes an upper neighborhood point C3 and a lower neighborhood point C4; for sample point D, it includes an upper neighborhood point D3 and a lower neighborhood point D4.
For example, assuming that the lateral blackboard writing coordinate set only includes a sampling point C and a sampling point D, by using a bezier curve or other trajectory positioning curves, an upper neighborhood point C3 and an upper neighborhood point D3 may be connected, a lower neighborhood point C4 and a lower neighborhood point D4 may be connected, the upper neighborhood point C3 and the lower neighborhood point C4 may be connected, and the upper neighborhood point D3 and the lower neighborhood point D4 may be connected to form a simple closed region, so that the blackboard writing of the sampling point C and the sampling point D may be simulated without considering the falling points of the initial starting and ending strokes.
Step five: and determining the target blackboard writing content according to the longitudinal blackboard writing handwriting and the transverse blackboard writing handwriting.
In one possible implementation, the blackboard-writing coordinates are expressed as (x)i,yi) Wherein x isi、yiRespectively representing the abscissa and the ordinate of the blackboard-writing handwriting corresponding to the ith sampling point;
determining a left neighborhood point, a right neighborhood point, an upper neighborhood point and a lower neighborhood point corresponding to the sampling point according to the writing coordinates of the writing on the blackboard corresponding to the sampling point, wherein the method comprises the following steps:
for writing coordinates (x) of blackboard writingi,yi) Will be
Figure BDA0003310421000000091
Left neighborhood point as the ith sampling point will
Figure BDA0003310421000000092
The right neighborhood point as the ith sampling point is
Figure BDA0003310421000000093
As the lower neighborhood point of the ith sampling point, will
Figure BDA0003310421000000094
An upper neighborhood point as an ith sampling point; wherein w is a first preset neighborhood positive value, and h is a second preset neighborhood positive value.
Optionally, the first preset neighborhood positive value w and the second preset neighborhood positive value h may be the same or different, and are specifically set according to actual needs. Each sampling point may correspond to a first neighborhood positive value w and a second neighborhood positive value h, or multiple sampling points may correspond to the same first neighborhood positive value w and the same second neighborhood positive value h.
In a possible implementation manner, the step three may include:
and connecting the left adjacent domain points of every two adjacent sampling points on any time sequence in the longitudinal blackboard writing coordinate set by using a Bessel curve, and connecting the right adjacent domain points of the two adjacent sampling points on any time sequence to obtain the longitudinal blackboard writing of the blackboard writing.
Optionally, whether sampling points in the longitudinal blackboard-writing coordinate set are adjacent or not can be determined according to the time sequence, for two adjacent sampling points, left neighborhood points of the two sampling points can be connected, and right neighborhood points of the two sampling points can be connected. And connecting all sampling points in the longitudinal blackboard writing coordinate set according to the method to finally obtain the longitudinal blackboard writing.
In one possible implementation manner, before connecting left neighboring points of every two time-series adjacent sampling points in the longitudinal blackboard writing coordinate set by using a bezier curve and connecting right neighboring points of the two time-series adjacent sampling points, the method further includes:
judging whether any two sampling points in the longitudinal blackboard writing coordinate set are adjacent or not;
and if the absolute value of the difference value of the time sequences of the two sampling points is less than or equal to a first preset threshold value, judging that the two sampling points are adjacent.
Optionally, if the absolute value of the difference between the time sequences of the two sampling points is greater than the first preset threshold, it is determined that the two sampling points are not adjacent to each other. Whether the two sampling points are adjacent to each other can be judged through the absolute value of the difference value of the time sequences of the two sampling points.
In a possible implementation manner, the step four may include:
and connecting the upper neighborhood points of every two arbitrary sampling points in the coordinate set of the transverse blackboard writing handwriting by using a Bezier curve, and connecting the lower neighborhood points of the adjacent sampling points in any two time sequences to obtain the transverse blackboard writing handwriting of the blackboard writing handwriting.
Optionally, whether sampling points in the horizontal blackboard-writing coordinate set are adjacent or not can be determined according to the time sequence, for two adjacent sampling points, the upper neighborhood points of the two sampling points can be connected, and the lower neighborhood points of the two sampling points can be connected at the same time. And connecting all sampling points in the transverse blackboard writing coordinate set according to the method to finally obtain the transverse blackboard writing.
In a possible implementation manner, before connecting upper neighborhood points of every two time-series adjacent sampling points in the horizontal blackboard writing coordinate set by using a bezier curve and connecting lower neighborhood points of the two time-series adjacent sampling points, the method further includes:
judging whether any two sampling points in the transverse blackboard writing coordinate set are adjacent or not;
and if the absolute value of the difference value of the time sequences of the two sampling points is less than or equal to a second preset threshold value, judging that the two sampling points are adjacent.
Optionally, if the absolute value of the difference between the time sequences of the two sampling points is greater than a second preset threshold, it is determined that the two sampling points are not adjacent to each other.
In a possible implementation manner, the step five may include:
determining a first sampling point and a last sampling point of the blackboard writing according to the time sequence corresponding to the plurality of sampling points;
generating a first semi-closed area according to a left adjacent area point and a right adjacent area point of the first sampling point; the first semi-closed area is used for representing a starting area of a starting point of the blackboard writing;
generating a second semi-closed area according to the left adjacent area point and the right adjacent area point of the last sampling point; the second semi-closed area is used for representing a writing front area of an end point of the writing of the blackboard writing;
based on the first semi-closed area and the second semi-closed area, combining the longitudinal blackboard writing handwriting and the transverse blackboard writing handwriting to generate a closed handwriting area of the blackboard writing handwriting;
and filling the closed handwriting area to obtain the target blackboard-writing content.
Optionally, the specific process may be:
first, at the first sampling point of each writing script, a semicircle may be generated according to the left and right neighborhood points of the sampling point, or according to the upper and lower neighborhood points of the sampling point.
Secondly, at the last sampling point of each writing script, a semicircular arc can be generated according to the left neighborhood point and the right neighborhood point of the sampling point, or a writing front area can be generated according to the upper neighborhood point and the lower neighborhood point of the sampling point. Wherein, the writing front area corresponds to the trend of the writing handwriting of the blackboard writing.
And thirdly, combining the semicircular arc area, the writing tip area, the longitudinal blackboard writing handwriting and the transverse blackboard writing to generate a closed writing area of the blackboard writing.
And fourthly, filling the closed handwriting area to obtain the target blackboard-writing content.
In some embodiments, in S102, if the display mode of the display screen is asynchronous display, the method for implementing memory display in the display screen further includes:
receiving real-time blackboard writing coordinate information sent by an intelligent blackboard, and converting the real-time blackboard writing coordinate information into real-time blackboard writing content;
the target blackboard-writing content comprises all real-time blackboard-writing contents when the display mode of the display screen is asynchronous display.
In this embodiment, during the asynchronous display period, the intelligent blackboard can acquire the blackboard writing coordinate of the intelligent blackboard in real time, in this embodiment, the blackboard writing coordinate acquired by the intelligent blackboard in real time is called as real-time blackboard writing coordinate information, and the real-time blackboard writing coordinate information is acquired by the intelligent blackboard and then is immediately transmitted to the display screen.
During asynchronous display, when the display screen receives real-time blackboard-writing handwriting coordinate information, the real-time blackboard-writing handwriting coordinate information can be converted into real-time blackboard-writing content, and when the display mode of the display screen is switched from asynchronous display to synchronous display, target blackboard-writing content is displayed in the display screen. The target blackboard-writing content comprises all real-time blackboard-writing content during the display mode of the display screen is asynchronous display.
The method for converting the real-time writing coordinate information into the real-time writing content can refer to the method for converting the target writing coordinate information into the target writing content, and is not described in detail.
In some embodiments, in S102, if the display mode of the display screen is asynchronous display, the method for implementing memory display in the display screen further includes:
receiving real-time blackboard writing coordinate information sent by an intelligent blackboard;
when the display mode of the display screen is switched from asynchronous display to synchronous display, the method for realizing memory display in the display screen further comprises the following steps:
and converting all the received real-time blackboard-writing coordinate information into target blackboard-writing contents.
In this embodiment, during the asynchronous display period, the intelligent blackboard can acquire the blackboard writing coordinate of the intelligent blackboard in real time, in this embodiment, the blackboard writing coordinate acquired by the intelligent blackboard in real time is called as real-time blackboard writing coordinate information, and the real-time blackboard writing coordinate information is acquired by the intelligent blackboard and then is immediately transmitted to the display screen.
During asynchronous display, the display screen can receive real-time blackboard-writing coordinate information sent by the intelligent blackboard, and when the display mode of the display screen is switched from asynchronous display to synchronous display, the display screen adopts the existing method to convert all the received real-time blackboard-writing coordinate information into target blackboard-writing content and display the target blackboard-writing content in the display screen.
The method for converting all real-time blackboard-writing coordinate information into the target blackboard-writing content can refer to the method for converting the target blackboard-writing coordinate information into the target blackboard-writing content, and is not described any more.
In some embodiments, in the above S102, when the display mode of the display screen is switched from asynchronous display to synchronous display, displaying the target blackboard-writing content in the display screen may include:
if the position of the target blackboard-writing content is overlapped with the position of the first display content, only the target blackboard-writing content is displayed in the display screen;
if the position of the target blackboard-writing content is not overlapped with the position of the first display content, the target blackboard-writing content and the first display content are displayed in the display screen at the same time, or only the target blackboard-writing content is displayed in the display screen;
the first display content is the display content of the display screen when the display mode of the display screen is asynchronous display.
In this embodiment, if the newly added blackboard writing content (i.e., the target blackboard writing content) of the intelligent blackboard during the asynchronous display period and the display content (i.e., the first display content) of the display screen during the asynchronous display period are overlapped, at this time, if the target blackboard writing content is displayed on the basis of the first display content, a part of the content is unclear, and therefore, in this case, when the display mode of the display screen is switched from the asynchronous display to the synchronous display, the display screen displays only the target blackboard writing content.
If the target blackboard-writing content is not overlapped with the first display content in position, the unclear problem does not exist, so that when the display mode of the display screen is switched from asynchronous display to synchronous display, the display screen can only display the target blackboard-writing content, and can also display the target blackboard-writing content and the first display content at the same time.
In this embodiment, the fact that the position of the target blackboard-writing content overlaps with the position of the first display content means that when the target blackboard-writing content and the first display content are displayed on the display screen at the same time, part or all of the target blackboard-writing content overlaps with the first display content.
In some embodiments, after S101, the method for implementing a memory display in the display screen further includes:
and if the display mode of the display screen is synchronous display, keeping the display content of the display screen consistent with the blackboard-writing content of the intelligent blackboard.
In this embodiment, if the display mode of the display screen is synchronous display, the display content of the display screen is kept consistent with the blackboard-writing content of the intelligent blackboard, that is, the display content of the display screen changes with the blackboard-writing content of the intelligent blackboard.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 6 is a schematic structural diagram of an apparatus for implementing a memory display in a display screen provided in an embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown, which is detailed as follows:
as shown in fig. 6, the apparatus 30 for implementing a memory display in a display screen includes: a detection module 31 and an asynchronous display module 32.
The detection module 31 is used for detecting the display mode of the display screen; the display mode is synchronous display or asynchronous display;
the asynchronous display module 32 is configured to, if the display mode of the display screen is asynchronous display, keep the display content of the display screen unchanged, and display the target blackboard-writing content in the display screen when the display mode of the display screen is switched from asynchronous display to synchronous display;
the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display.
In one possible implementation, the asynchronous display module 32 is further configured to:
when the display mode of the display screen is switched from asynchronous display to synchronous display, receiving target blackboard-writing coordinate information sent by the intelligent blackboard, and converting the target blackboard-writing coordinate information into target blackboard-writing content;
and the target writing coordinate information is writing coordinate information corresponding to the target writing content.
In one possible implementation, the asynchronous display module 32 is further configured to:
if the display mode of the display screen is asynchronous display, receiving real-time blackboard-writing handwriting coordinate information sent by the intelligent blackboard, and converting the real-time blackboard-writing handwriting coordinate information into real-time blackboard-writing content;
the target blackboard-writing content comprises all real-time blackboard-writing contents when the display mode of the display screen is asynchronous display.
In one possible implementation, the asynchronous display module 32 is further configured to:
and if the display mode of the display screen is asynchronous display, receiving the real-time blackboard-writing coordinate information sent by the intelligent blackboard, and converting all the received real-time blackboard-writing coordinate information into target blackboard-writing contents when the display mode of the display screen is switched from asynchronous display to synchronous display.
In a possible implementation manner, when the display mode of the display screen is switched from the asynchronous display to the synchronous display, the asynchronous display module 32 is specifically configured to:
if the position of the target blackboard-writing content is overlapped with the position of the first display content, only the target blackboard-writing content is displayed in the display screen;
if the position of the target blackboard-writing content is not overlapped with the position of the first display content, the target blackboard-writing content and the first display content are displayed in the display screen at the same time, or only the target blackboard-writing content is displayed in the display screen;
the first display content is the display content of the display screen when the display mode of the display screen is asynchronous display.
In a possible implementation manner, the apparatus 30 for implementing a memory display in a display screen further includes a synchronous display module.
The synchronous display module is used for:
and if the display mode of the display screen is synchronous display, keeping the display content of the display screen consistent with the blackboard-writing content of the intelligent blackboard.
Fig. 7 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 7, the terminal device 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in said memory 41 and executable on said processor 40. The processor 40 executes the computer program 42 to implement the steps in the above-mentioned method embodiments for implementing memory display in each display screen, for example, S101 to S102 shown in fig. 1. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-mentioned device embodiments, such as the modules/units 31 to 32 shown in fig. 6.
Illustratively, the computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 42 in the terminal device 4. For example, the computer program 42 may be divided into the modules/units 31 to 32 shown in fig. 6.
The terminal device 4 may be a display screen, or may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will appreciate that fig. 7 is merely an example of a terminal device 4 and does not constitute a limitation of terminal device 4 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal device 4, such as a hard disk or a memory of the terminal device 4. The memory 41 may also be an external storage device of the terminal device 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal device 4. The memory 41 is used for storing the computer program and other programs and data required by the terminal device. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the method embodiments for implementing the memory display in each display screen. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (10)

1. A method for realizing memory display in a display screen is characterized by comprising the following steps:
detecting a display mode of the display screen; the display mode is synchronous display or asynchronous display;
if the display mode of the display screen is asynchronous display, keeping the display content of the display screen unchanged, and displaying the target blackboard-writing content in the display screen when the display mode of the display screen is switched from asynchronous display to synchronous display;
the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display.
2. The method for implementing memory display in a display screen according to claim 1, wherein when the display mode of the display screen is switched from asynchronous display to synchronous display, the method for implementing memory display in the display screen further comprises:
receiving target blackboard writing coordinate information sent by the intelligent blackboard, and converting the target blackboard writing coordinate information into target blackboard writing content;
and the target writing coordinate information is writing coordinate information corresponding to the target writing content.
3. The method for implementing memory display in a display screen according to claim 1, wherein if the display mode of the display screen is asynchronous display, the method for implementing memory display in the display screen further comprises:
receiving real-time blackboard writing coordinate information sent by the intelligent blackboard, and converting the real-time blackboard writing coordinate information into real-time blackboard writing content;
the target blackboard-writing content comprises all real-time blackboard-writing contents when the display mode of the display screen is asynchronous display.
4. The method for implementing memory display in a display screen according to claim 1, wherein if the display mode of the display screen is asynchronous display, the method for implementing memory display in the display screen further comprises:
receiving real-time blackboard writing coordinate information sent by the intelligent blackboard;
when the display mode of the display screen is switched from asynchronous display to synchronous display, the method for realizing memory display in the display screen further comprises the following steps:
and converting all the received real-time blackboard-writing coordinate information into the target blackboard-writing content.
5. The method for realizing the memory display in the display screen according to claim 1, wherein the displaying the target blackboard-writing content in the display screen comprises:
if the position of the target blackboard-writing content is overlapped with the position of the first display content, only the target blackboard-writing content is displayed in the display screen;
if the position of the target blackboard-writing content is not overlapped with the position of the first display content, simultaneously displaying the target blackboard-writing content and the first display content in the display screen, or only displaying the target blackboard-writing content in the display screen;
the first display content is the display content of the display screen when the display mode of the display screen is asynchronous display.
6. The method for realizing the memory display in the display screen according to any one of claims 1 to 5, wherein after the detecting the display mode of the display screen, the method for realizing the memory display in the display screen further comprises:
and if the display mode of the display screen is synchronous display, keeping the display content of the display screen consistent with the blackboard-writing content of the intelligent blackboard.
7. An apparatus for implementing memory display in a display screen, comprising:
the detection module is used for detecting the display mode of the display screen; the display mode is synchronous display or asynchronous display;
the asynchronous display module is used for keeping the display content of the display screen unchanged if the display mode of the display screen is asynchronous display, and displaying the target blackboard-writing content in the display screen when the display mode of the display screen is switched from asynchronous display to synchronous display;
the target writing content is newly added blackboard writing content of the intelligent blackboard when the display mode of the display screen is asynchronous display.
8. The apparatus for implementing a memory display in a display screen according to claim 7, wherein the asynchronous display module is further configured to:
when the display mode of the display screen is switched from asynchronous display to synchronous display, receiving target blackboard writing coordinate information sent by the intelligent blackboard, and converting the target blackboard writing coordinate information into target blackboard writing content;
and the target writing coordinate information is writing coordinate information corresponding to the target writing content.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for implementing a memory display in a display screen according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of a method for implementing a memory display in a display screen according to any one of claims 1 to 6.
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