KR20160014759A - Apparatus and method for controlling image screen using portable terminal - Google Patents

Abstract

The present invention relates to an image screen control method using a mobile terminal having a camera. According to the present invention, the image screen control method using the mobile terminal in a visible light communication system comprises: a step of enlarging and projecting a screen, wherein a reference point is displayed, in the mobile terminal onto an external display; a step of configuration to match a coordinate value of a pointed external display screen to a coordinate value of the screen, wherein the reference point is displayed, in the mobile terminal, when a specific device points to the reference point of the screen projected on the external display; and a step of controlling content, projected on the external display, in the mobile terminal by recognizing a motion pattern by using a specific apparatus, at the pointed spot.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and an apparatus for controlling an image screen using a portable terminal,

The present invention relates to a method and apparatus for implementing a presentation function of a portable terminal, and more particularly, to a portable terminal having a camera, enlarging and displaying the display screen thereof on a display screen of an external device, And more particularly, to a method and apparatus for controlling a video image using a portable terminal in a visible light communication system for controlling contents in a portable terminal through a visible light point or a pointing tool.

In general, presentation refers to presentation of research contents, presentation of plans and business manuals, presentation at seminars, etc., and presentation of opinions and opinions to a large number of people.

In the case where it is necessary to provide a large number of people with the data necessary for the presentation, a distribution of a handout, utilization of a briefing chart, a slider projector, OHP, and the like are used.

In recent years, it is common to use a plurality of projectors which are easy to use and have various functions.

At this time, since a space mainly used can be used only in an environment in which a computer, a magnifying image projection device connected to the computer, and a camera connected to the computer are prepared, the space used is limited, and the coordinates of the visible light point projected on the projected image So that the function to be utilized is very simple and the function of being activated is very limited.

As shown in FIG. 1, a portable computer is connected to an external display device such as a projector. However, even if a portable computer is used, it is bulky and bulky because of its heavy weight. It is inconvenient to carry the portable computer itself.

For example, if the projector is far away, the presenter can not manipulate the portable computer directly. Therefore, the person who needs to operate the portable computer is needed according to the progress of the presentation. There is a problem.

In addition, according to the progress of the presenter, the screen information of the portable computer must be called. As the two persons proceed, the presenter and the computer operator have inconvenience to try to synchronize with each other with eyes or a signal.

In addition, this is caused by unintentional movement of a hand supporting an apparatus for projecting a visible light spot, or sudden movement or tremble of a visible light spot caused by camera shake. At this time, the coordinate of the extracted visible light point coincides with the intellectual point of the mouse There arises a problem that stability of operation is hindered due to unintentional coordinates.

An object of the present invention is to provide an apparatus and method for controlling an image screen using a portable terminal in a visible light communication system, in which a screen in a portable terminal is projected on an enlarged image on an external display, And pointing to a point to control the function in the portable terminal to operate.

It is a further object of the present invention to provide a method and apparatus for recognizing movement patterns of an unintentional movement or shudder of a predetermined tool caused by unintentional movement of a user's hand using a predetermined tool, The purpose is to eliminate the unintentional movement or the occurrence of camera shake as much as possible, thereby ensuring the accuracy of the function by reducing the error in which the intended function is not operated or the operation of the unintended function is performed.

According to an aspect of the present invention, there is provided a method of controlling an image screen using a mobile terminal having a camera, the method comprising the steps of enlarging and projecting a screen displaying a reference point in the mobile terminal on an external display, Setting a coordinate value of the pointed external display screen and a coordinate value of a screen displayed in the portable terminal to coincide when a reference point of the screen projected on the display is pointed by a predetermined tool; And controlling the content in the portable terminal projected on the external display by recognizing the movement pattern using the tool of the portable terminal.

According to another aspect of the present invention, there is provided an image screen control apparatus using a portable terminal having a camera, the image screen control apparatus comprising: a video transmission unit for outputting a screen to be displayed on the portable terminal, A recognition unit for recognizing a pointing and a movement through a predetermined tool on an external display screen through the photographing unit and a coordinate value of the pointed external display screen, A movement pattern extracting unit for extracting a movement pattern using a predetermined tool at the pointed point, and a movement pattern extracting unit for extracting a movement pattern using the motion of the predetermined tool, And a control unit for controlling contents in the projected portable terminal .

As described above, in the method and apparatus for controlling an image screen using a portable terminal in a visible light communication system, functions necessary for presentation are concentrated in a portable terminal, thereby reducing the inconvenience of preparing separate presentation equipment in a simple meeting or the like .

In addition, the present invention can be applied not only to a pointing point on an external display screen but also to a point on a three-dimensional space by using a large-sized display that can directly display a large screen, The position and the movement style of one or more pointing points of the mobile terminal are extracted to correspond to various functions, thereby providing a convenient user interface environment.

In addition, it is possible to remove the unnecessary motion or trembling of the visible light point or the tool pointing point caused by unintentional hand movement or camera shake in the process of extracting the motion style as much as possible, It is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional enlarged imaging device system having a presentation function; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for controlling an image display using a portable terminal in a visible light communication system according to an embodiment of the present invention.
FIG. 3 is a schematic view showing reference point setting and coordinate correspondence in a screen in a portable terminal and an external display screen; FIG.
4 is a flowchart illustrating a method of controlling an image screen using a mobile terminal in a visible light communication system according to an exemplary embodiment of the present invention.
FIG. 5 is a flowchart illustrating a movement pattern recognition procedure according to characteristics of each movement pattern in a method of controlling an image screen using a mobile terminal in a visible light communication system according to an exemplary embodiment of the present invention.
6A, 6B, 6C, 6D and 6E show an image screen control method using a portable terminal in a visible light communication system according to an embodiment of the present invention. FIG.
7 is a diagram schematically illustrating correction of a specific pattern locus in a method of controlling an image screen using a mobile terminal in a visible light communication system according to an embodiment of the present invention.
8A and 8B are detailed block diagrams of a video screen control apparatus using a mobile terminal in a visible light communication system according to an embodiment of the present invention and a detailed block diagram of the control unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be appreciated that those skilled in the art will readily observe that certain changes in form and detail may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. To those of ordinary skill in the art.

2 is a schematic block diagram of an overall system for controlling a video screen using a mobile terminal in a visible light communication system according to an embodiment of the present invention.

The system to which the present invention is applied includes an external enlargement image projection device 214 connected to the portable terminal 216 or a built-in enlargement image projection device 212 mounted in the portable terminal, a camera provided in the portable terminal, An external display screen 210 in which a screen is enlarged and projected and a predetermined tool 218 for pointing at an arbitrary point newly projected on the external display screen 210. In the present invention, And a colored tool at the position of FIG.

Hereinafter, a portable terminal referred to in the detailed description of the present invention will be described with reference to an enlarged image projection apparatus mounted in a portable terminal.

Next, a schematic operation of the system to which the present invention is applied will be described in detail with reference to the configuration diagram of FIG.

3 is a block diagram schematically showing reference point setting and coordinate correspondence in a screen in a portable terminal and an external display screen.

First, an operation of setting a reference point is performed so that the coordinates of the cadence points projected on the external display screen 310 correspond to the coordinates on the screen of the portable terminal 316, such as the screen 312 of the portable terminal.

More specifically, when an image to be displayed on the portable terminal 316 is output in an initial operation and is enlarged and projected on the external display screen 310, the coordinates of the portable terminal 316 and the external display screen 310 That is, a screen having a + mark at the four corners of the screen of the portable terminal 316, that is, a screen on which the reference point is set, is projected on the external display screen 310 as an enlarged image, The coordinates of the + display points of the four corners located on the enlarged image projected on the external display screen 310 are displayed on the display screen of the external display screen 310, Is set so as to correspond to the coordinates of the four corners of the screen in the terminal 316 plus the display point.

After the setting is completed, the position pointed by the predetermined tool 318 on the projected enlarged image 310 is set to a relative distance from the + display points set at the setting of the reference point, Correspondence is made to the position of the point lying at a distance of the same ratio from the + marking points on the screen.

The coordinate correspondence between the screen in the portable terminal 316 and the external display screen 310 is as follows.

External display enlarged image Screen of portable terminal (0,0)
(x, 0)
(0, y)
(x, y) (0,0)
(x, 0)
(0, y)
(x, y)

Hereinafter, a schematic configuration of an overall system for controlling an image screen using a portable terminal in a visible light communication system according to an embodiment of the present invention and a visible light communication system according to a preferred embodiment of the present invention will be described with reference to FIG. A video screen control method using a portable terminal of the present invention will be described.

4 is a flowchart illustrating a method of controlling an image screen using a mobile terminal in a visible light communication system according to an exemplary embodiment of the present invention.

First, in step 410, a screen displaying a reference point in a portable terminal for coordinate setting is enlarged and projected on an external display screen.

The reference point is displayed at the four corners of the screen to be displayed, which occurs only when the initial screen is output for coordinate setting, and the reference point means the actual range of the currently displayed screen.

In step 412, the + mark displayed on the external display screen is pointed through a predetermined tool, and the coordinate values of the external display screen and the screen in the portable terminal are set to coincide with each other.

At this time, the predetermined tool means one or more tools which colors a visible light spot or arbitrary color used by a user at an arbitrary position, and a specific point on the pointed external display screen is identifiable through the tool.

In step 414, the external display screen is photographed.

Here, the photographed screen refers to a visible image point newly projected at the same point as the coordinate value in the portable terminal on the external display screen or a full screen pointed through one or more tools painted at an arbitrary position at an arbitrary position .

In step 416, coordinate values and movement patterns of a specific point pointed through the photographed screen are recognized.

At this time, for example, when the predetermined tool is a visible light point, the movement pattern is recognized so as to respond to the blinking once by a "click" function and to respond to the blinking twice by "double clicking" So that various operation icons on the content being output from the portable terminal projected on the external display screen can be activated.

By activating any object on the enlarged image projected on the external display screen and then moving the visible light point, it is possible to "dragging", by activating the "draw" icon and then moving the visible light point Lines, figures and figures are displayed on the external display screen according to the movement.

6A and 6B, the movement pattern may be a character, a picture, or a command symbol for performing a specific command displayed on a display screen through a predetermined tool, When a picture or a command symbol is desired to be displayed, it can be set by the user's choice within the portable terminal and displayed according to the set value. At this time, the trajectory of the pattern due to unnecessary or unintentional hand shake that occurs during display of the character, figure, or command symbol can be corrected, and it is performed in step 417, which will be described in detail with reference to FIG. 5 described later .

In operation 418, the operation of the corresponding object is recognized by recognizing the movement pattern of the pointed point by the predetermined tool, or performing the corresponding operation in the portable terminal having the command symbol corrected in operation 417, And controls any content displayed on the external display screen.

As described above, the present invention is pointed out through a predetermined tool, recognizes the movement pattern of the pointed point, and performs an operation of the corresponding object, thereby using two or more visible light points as shown in FIG. 6 (c) (Zoon In), zoom out (Zoom In), or rotate an object on the projected magnified image.

As shown in (d) of FIG. 6, by setting all of the plurality of visible light points newly projected on the screen projected on the external display screen to coincide with the coordinate points on the screen in the portable terminal, one or more uses and the plurality of visible light points And the like.

As shown in FIG. 6E, when a game is operated with an enlarged image projected using an external display screen, a visible light spot to be projected or a point at which a predetermined tool is pointing may be applied to a controller of a game machine.

In the present invention, the types of movement patterns in step 416 are defined as characters, command symbols, and pictures, and FIG. 5 shows a method of recognizing movement patterns according to the characteristics of each movement pattern.

FIG. 5 is a flowchart illustrating a method of displaying a specific pattern, for example, a character, a picture, or a command symbol on an external display screen by using a predetermined tool, in order to correct a nonsensical motion of a visible light spot caused by unintentional hand movement, First, in step 510, the user selects a movement pattern to be displayed on the external display screen through a predetermined tool.

로 선택한다. If the selected movement pattern is a command symbol (step 512), the starting point at which the command symbol is displayed, that is, the current visible light point coordinate is selected as d0 (step 514) That is, the visible light point coordinates of the corresponding movement point after the set time value set according to the characteristic of the command symbol is selected as d1 (step 518), and the distance between d0 and d1 is calculated (step 520)

.

Here, the desired recognition means that the user is proceeding to display a command symbol on the external display screen through a predetermined tool. The command symbol may be a symbol for performing a specific function, for example, The page of the screen currently being displayed along the direction of the arrow with a symbol like an arrow is movable as shown in Fig.

가 원하는 인식에 따라 상기 명령 기호의 특성에 따라 설정된 일정 거리 D1 보다 작을 경우, 다시 말해 상기 계산된 거리 값

가 설정된 거리 값보다 작을 경우, 상기 d0과 d1을 연결하는 선형 보간(linear interpolation)을 수행하고(523 과정), 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 클 경우, 다시 516 과정으로 점프하여 일정 시간 T1을 기다린 다음 동일한 동작 흐름을 반복한다.remind

Is smaller than the predetermined distance D1 set according to the characteristic of the command symbol according to a desired recognition, that is, the calculated distance value

If the distance d0 is smaller than the predetermined distance value, linear interpolation is performed to connect d0 and d1 (step 523)

Is greater than the predetermined distance D1 set according to the desired recognition, the process jumps to step 516 again, waits for a predetermined time T1, and repeats the same operation flow.

In this operation flow, a motion greater than a predetermined distance D within a predetermined time T is canceled and can be eliminated in the process of correcting the motion trajectory such as sudden motion, nonsense motion, and trembling due to camera shake, Respectively.

Therefore, by setting the predetermined time T and the predetermined distance D differently according to the desired recognition function, it is possible to secure more accurate operation accuracy according to the characteristics of each movement pattern.

로 선택한다. 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 작을 경우, 상기 d0과 d1을 연결하는 선형 보간을 수행하고(523 과정), 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 클 경우, 다시 524 과정으로 점프하여 일정 시간 T2를 기다린 다음 동일한 동작 흐름을 반복한다.On the other hand, if the selected motion pattern is text recognition (520), that is, when the user selects a text function through a predetermined tool, the starting point at which the text is displayed, that is, the current visible light point coordinate is d0 (Step 522), a predetermined time T2 (step 524) and a subsequent visible point coordinate d1 are selected according to the desired recognition (step 526), the distance between d0 and d1 is calculated (step 528)

. remind

(Step 523). If the difference d0 is smaller than the predetermined distance D1,

Is greater than the predetermined distance D1 set according to the desired recognition, the process jumps to step 524 again, waits for a predetermined time T2, and repeats the same operation flow.

In this operation flow, a motion greater than a predetermined distance D within a predetermined time T is canceled and can be removed in the process of correcting the motion trajectory such as sudden motion due to hand shake, meaningless motion, and trembling, Respectively.

Therefore, by setting the predetermined time T and the predetermined distance D differently according to a desired recognition function, it is possible to secure more accurate operation accuracy according to the characteristics of each movement pattern.

로 선택한다. 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 작을 경우, 상기 d0과 d1을 연결하는 선형 보간(linear interpolation)을 수행하고(523 과정), 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 클 경우, 다시 536 과정으로 점프하여 일정 시간 T3을 기다린 다음 동일한 동작 흐름을 반복한다.If the selected motion pattern is picture recognition (step 532), the starting point at which the picture is displayed, that is, the current visible light point coordinate is selected as d0 (step 534) (Step 536), the subsequent visible point coordinate is selected as d1 (step 538), and the distance between d0 and d1 is calculated (step 540)

. remind

The linear interpolation is performed to connect d0 and d1 (step 523), and if it is smaller than the predetermined distance D1,

Is greater than the predetermined distance D1 set in accordance with the desired recognition, the process jumps to step 536 again, waits for a predetermined time T3, and repeats the same operation flow.

In this operation flow, a motion larger than a predetermined distance D within a predetermined time T is canceled and can be removed in the process of correcting a motion locus such as a sudden motion due to a camera-shake, a meaningless motion, a tremor, Respectively.

Accordingly, by setting the predetermined time T and the predetermined distance D differently according to the desired recognition function, more accurate accuracy can be ensured depending on the characteristics of each movement pattern.

로 선택한다. 상기

가 원하는 인식에 따라 설정된 일정 거리 D1 보다 작을 경우, 상기 d0과 d1을 연결하는 선형 보간(linear interpolation)을 수행하고(523 과정), 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 클 경우, 다시 546 과정으로 점프하여 일정 시간 T4을 기다린 다음 동일한 동작 흐름을 반복한다.If the selected movement pattern is not a command symbol, text or picture, the movement pattern is recognized as dragging and clicking, and the starting point at which the dragging and clicking are displayed, that is, the current visible light point coordinate is selected as d0 544), a predetermined time T1 (546 steps) is selected according to the desired recognition, and a visible light point coordinate thereafter is selected as d1 (step 548), and the distance between d0 and d1 is calculated (step 550)

. remind

The linear interpolation is performed to connect d0 and d1 (step 523), and if it is smaller than the predetermined distance D1,

Is greater than the predetermined distance D1 set according to the desired recognition, the process jumps to step 546 again, waits for a predetermined time T4, and then repeats the same operation flow.

For example, when the command symbol is recognized, the visible light spot moves relatively quickly. Therefore, the predetermined time T may be set to a relatively short 0.1 second, the predetermined distance D may be set to a relatively long 30 mm, It is possible to set the relative length to 10 mm.

Therefore, according to the present invention, in accordance with the type of the pattern to be displayed on the external display screen, for example, in accordance with the characteristic corresponding to a specific pattern such as a character, a picture or a command symbol for performing an operation of a specific function The predetermined time T and the predetermined distance D can be set in advance.

8 is a detailed block diagram of an image screen control apparatus using a portable terminal in a visible light communication system according to an embodiment of the present invention.

It is assumed that the apparatus 800 may be provided in a portable terminal or may be provided in an external apparatus that can be connected to the portable terminal through a cable.

8A, the apparatus 800 includes a photographing unit 810, a recognizing unit 812, a coordinate setting unit 814, a movement pattern unit 816, an image transmitting unit 818, 820, a setting unit 822,

The image transmitting unit 818 outputs a screen to be displayed on the portable terminal and enlarges and projects the image on an external display.

At this time, a reference point for setting coordinates coinciding with the external display screen is displayed on the screen displayed on the portable terminal.

The photographing unit 810 photographs an external display screen and the recognizing unit 812 recognizes pointing and movement through a predetermined tool on the external display screen through the photographing unit 810. [

More specifically, when a predetermined tool is a visible light point, it responds with a "click" function, ie, a single motion, ie, a single click, and a "double click" "

Also, the recognizing unit 812 can perform "dragging" by activating an arbitrary object on the enlarged image projected on the external display screen and then moving the visible light point, and " After activating the icon and moving the visible light spot, lines, figures and figures are displayed on the external display screen according to the movement.

The coordinate setting unit 814 sets the coordinate value of the pointed external display screen to coincide with the coordinate value of the screen in the portable terminal.

The movement pattern extracting unit 816 extracts a movement pattern at a pointing point through a predetermined tool by the user on the external display screen and outputs the extracted movement pattern to the controller 824.

More specifically, when a predetermined tool is a visible light point, it responds with a "click" function, ie, a single motion, ie, a single click, and a "double click" Quot ;, and outputs the extracted icon to the controller 824, thereby activating various operation icons on the content being output from the portable terminal projected on the external display screen.

The control unit 824 controls the content in the portable terminal projected on the external display by using the motion of the predetermined tool extracted by the movement pattern extracting unit 816. [

The selecting unit 820 selects a type of a pattern to be displayed by the user on the external display screen.

For example, the user can select a specific pattern to be displayed on the external display screen, that is, a text, a picture, and a command symbol.

The setting unit 822 sets and stores distance and time values corresponding to the characteristics of the specific pattern input through the selecting unit 820.

For example, when the user selects the input of the command symbol through the selection unit 820, the setting unit 822 extracts and applies the distance and time values corresponding to the command symbol.

Accordingly, when the user inputs a specific pattern to be displayed, the setting unit 822 extracts corresponding characteristic values, i.e., distance and time values, and outputs the extracted characteristic values to the control unit 824.

In addition, the controller 824 may use a distance value and a time value corresponding to the characteristic of the specific pattern obtained through the setting unit 822 to calculate the distance from the start point of the specific pattern displayed on the external display, A corrector 826 for calculating a distance to the corresponding point of the coordinate system 826 and comparing the calculated distance value with the set distance value to correct the locus of the specific pattern, A comparison unit 828 for comparing the corrected specific pattern with a symbol for performing a specific command in the mobile terminal, and a control unit And a symbol processing unit 830 for performing a symbol processing.

로 선택한다. For example, the correction unit 826 selects the starting point at which the command symbol output through the setting unit 822 is displayed, that is, the current visible light point coordinate d0, , The visible light point coordinate of the corresponding movement point after the set time value set in accordance with the characteristic of the command symbol is selected as d1 and the distance between d0 and d1 is calculated,

.

Here, the desired recognition means that the user is proceeding to display a command symbol on the external display screen through a predetermined tool. The command symbol may be a symbol for performing a specific function, for example, The page of the screen currently being displayed along the direction of the arrow with a symbol like an arrow is movable as shown in Fig.

가 원하는 인식에 따라 상기 명령 기호의 특성에 따라 설정된 일정 거리 D1보다 작을 경우, 다시 말해 상기 계산된 거리 값

가 설정된 거리 값보다 작을 경우, 상기 d0과 d1을 연결하는 선형 보간(linear interpolation)을 수행하고(523 과정), 상기

가 원하는 인식에 따라 설정된 일정 거리 D1보다 클 경우, 다시 516 과정으로 점프하여 일정 시간 T1을 기다린 다음 동일한 동작 흐름을 반복한다.remind

Is smaller than the predetermined distance D1 set according to the characteristic of the command symbol according to a desired recognition, that is, the calculated distance value

If the distance d0 is smaller than the predetermined distance value, linear interpolation is performed to connect d0 and d1 (step 523)

Is greater than the predetermined distance D1 set according to the desired recognition, the process jumps to step 516 again, waits for a predetermined time T1, and repeats the same operation flow.

In this operation flow, a motion greater than a predetermined distance D within a predetermined time T is canceled and can be eliminated in the process of correcting the motion trajectory such as sudden motion, nonsense motion, and trembling due to camera shake, Respectively.

Accordingly, the specific pattern to be displayed by the user is clearly recognized through the corrector 826, and the selected pattern is connected to the specific function in the portable terminal through the comparator 828 to perform the corresponding operation in the symbol processor 830 .

In addition, if it does not coincide with a specific command in the mobile terminal through the comparison unit 828, it is recognized as a character or a picture and is directly output on the external display screen.

As described above, an operation of the apparatus and method for controlling an image screen using a portable terminal in a visible light communication system can be performed according to an embodiment of the present invention. While the present invention has been described with respect to specific embodiments thereof, Modifications can be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by equivalents of the claims and the claims.

Claims (12)

1. An image screen control apparatus equipped with a camera,
A photographing unit for photographing an external display screen; And
And a controller for recognizing a pointing through a predetermined tool on the external display screen from the photographed image, correcting the motion locus of the pointing, and displaying the corrected motion locus on the external display Screen control device. The method according to claim 1,
A selection unit for selecting, on the external display screen, a type of movement trajectory the user wants to display; And
Further comprising a setting unit configured to preset a distance value and a time value corresponding to the selected motion trajectory through the selection unit. 3. The apparatus of claim 2,
Calculating a distance value from a starting point of a motion trajectory displayed on the external display to a corresponding moving point after a set time value by using a distance value and a time value corresponding to the motion trajectory, And corrects the motion locus based on the comparison result. The apparatus of claim 3,
If the calculated distance value is greater than the set distance value, displays the motion of the displayed motion trajectory continuously through a predetermined tool after waiting for the set time value,
And displays the distance value of the motion locus from the start point to the corresponding movement point after the set time value by linear interpolation if the calculated distance value is smaller than the set distance value. 2. The method according to claim 1,
Wherein the controller is a command symbol, a picture, and a character in the control device. The method according to claim 1,
And controls the content of the control device using the movement trajectory. The apparatus according to claim 1,
Wherein the display device is a tool painted with visible light or a predetermined color that can be displayed on the external display screen. A video screen control method of a video screen control apparatus equipped with a camera,
Recognizing pointing through a predetermined tool on a screen projected on an external display;
Correcting a motion locus of the pointing; And
And displaying the corrected motion locus on an external display. The method of claim 8, wherein the step of correcting the motion locus comprises:
Setting a distance value and a time value corresponding to the movement trajectory;
Calculating a distance value from a start point of the movement trajectory to a corresponding movement point after a set time value; And
And comparing the calculated distance value with a set distance value to correct the motion locus. 10. The method of claim 9,
If the calculated distance value is greater than the set distance value, displays the motion of the displayed motion trajectory continuously through a predetermined tool after waiting for the set time value,
And when the calculated distance value is smaller than the set distance value, displays the distance value from the starting point to the corresponding moving point after the set time value by linear interpolation. 9. The method according to claim 8,
Wherein the command is a command symbol, a picture, and a character in the control device. 9. The method of claim 8,
Further comprising the step of controlling the content of the control device using the movement trajectory.

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