CN103268171A - Projection light control demonstration system and control method thereof - Google Patents

Abstract

The invention discloses a projection light control demonstration system, which includes a computer unit, a projector for projecting output to a screen, a light pen for demonstration and manipulation on the screen, and an image acquisition device for collecting the positions of light spots on the screen , the image acquisition device transmits the acquired image to the computer unit, and the computer unit calculates and obtains the position coordinate information of the light spot by analyzing the image, and executes corresponding actions according to the control signal. The invention solves the disadvantages of the prior art, and provides a light-controlled mouse and its control system, which uses a pen to project light spots to drag desktop icons.

Description

Projection light control demonstration system and control method thereof

technical field

The present invention relates to the field of computer technology.

Background technique

In the prior art, the light point on the projected image (such as PPT presentation) is usually used to indicate the target position for on-site demonstration. At this time, the mouse is still required to operate the computer. The bright spot is used to indicate the target position, and the function of the wireless mouse cannot be realized. When demonstrating the projected image, the user needs to constantly switch between the light pen and the mouse, and the use process is complicated, resulting in a poor user experience.

Contents of the invention

In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a projection light control demonstration system and its control system, which uses a light pen instead of a mouse to complete specified operations and enhance user experience.

In order to achieve the above object, the present invention provides a projection light control demonstration system, including a computer unit, a projector for projecting output to the screen, a light pen for demonstration and manipulation on the screen, and a light point for collecting the screen. The image acquisition device of the position, the image acquisition device transmits the acquired image to the computer unit, and the computer unit calculates and obtains the position coordinate information of the light spot by analyzing the image, and executes the corresponding action according to the control signal.

As a further improvement of the present invention, the image acquisition device is arranged on a projector.

As a further improvement of the present invention, the light pen is provided with a power switch for controlling the light pen to be turned on and off.

As a further improvement of the present invention, the light pen is provided with a light source emission switch for controlling the emission of the light source.

As a further improvement of the present invention, the light pen is provided with a wireless communication switch for controlling the wireless communication with the computer unit.

The present invention also discloses a control method of a projection light control demonstration system, comprising the following steps:

a) When the computer unit detects the first control signal, record the initial position of the light pen (X0, Y0);

b) When the computer unit detects the second control signal, record the current position of the light pen (X1, Y1);

c) Send the first control signal, the second control signal, the initial position of the light pen (X0, Y0), and the current position information of the light pen (X1, Y1) to the computer unit, and the computer unit searches for the corresponding pre-stored command and executes the pre-stored command The operation corresponding to the command.

As a further improvement of the present invention, in the step a), the image is identified and the position of the light pen is calculated by analyzing the data of the image acquisition device.

As a further improvement of the present invention, the first control signal and the second control signal are generated by pressing or closing the wireless communication switch.

As a further improvement of the present invention, said pressing the wireless communication switch includes single-clicking the wireless communication switch, double-clicking the wireless communication switch, stopping pressing the wireless communication switch, and pressing the wireless communication switch for a long time.

As a further improvement of the present invention, step 3) is preceded by a calculation step. In the calculation step, the distance between the initial position of the pen (X0, Y0) and the current position of the light pen (X1, Y1) is calculated. When When the distance is less than a preset threshold, it is determined that the light pen has not moved.

The present invention is composed of a computer system, a light pen, a projector and a camera. The camera is used to shoot the projection screen, which is synchronously transmitted to the computer through a video acquisition card. The computer obtains the coordinates of the light pen projection point in the picture through image processing technology, and through this process, Complete some basic operations of the mouse. Using the movement of the light point of the light pen on the projected image (such as PPT presentation) and its own key signal, the human-computer interaction device that controls the computer is like using a mouse on the projected image. To be precise, the system captures the projected picture through the camera and waits for the key signal of the light pen. When the button on the light pen is pressed, a signal is sent to the system. After the system receives the signal, it will do two things: one is to calculate the corresponding position of the light spot on the screen; the other is to generate a control signal.

The beneficial effect of the present invention is that the object of the present invention combines the functions of the light pen and the mouse into one, that is, the light pen can be directly used to remotely control the projection screen, and replace the mouse to complete some basic operations of the computer, which is more convenient to use and carry.

Description of drawings

Accompanying drawing 1 is the basic structure diagram of the embodiment of the projection light control demonstration system according to the present invention;

Accompanying drawing 2 has described the functional block diagram of the control method of the projection light control demonstration system in accompanying drawing 1.

Detailed ways

The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Referring to Figure 1, a projection light control demonstration system includes a computer unit, a projector for projecting output to a screen, a light pen for demonstration and manipulation on the screen, and a light pen for collecting the position of a light point on the screen. Image acquisition equipment, the image acquisition equipment transmits the acquired image to the computer unit, and the computer unit calculates and obtains the position coordinate information of the light spot by analyzing the image, and executes corresponding actions according to the control signal.

In order to ensure the accuracy of image acquisition, the present invention arranges the image acquisition device on the projector. On the one hand, when the projector shakes or moves, the image acquisition device will also move synchronously to maintain the consistency of the picture, which can effectively ensure the accuracy of the position of the light pen; The distance between the acquisition device and the projector should be as small as possible, the image collected by the image acquisition device is equivalent to the image projected by the projector, the image distortion is small, and the position information of the light pen is also the most accurate.

In this embodiment, the light pen is provided with a power switch for controlling the light pen to be turned on and off, and the power switch can be turned off when not in use to save power.

In this embodiment, the light pen is provided with a light source emission switch for controlling the emission of the light source, and the wide source emission function can be selected to be turned on when needed to avoid generating disturbing optical signals.

In this embodiment, the light pen is provided with a wireless communication switch for controlling wireless communication with the computer unit. When the wireless communication signal is pressed, a control signal is generated, and the computer unit only calculates and analyzes the information that simultaneously generates the control signal and the light pen signal, which effectively improves the operating efficiency of the computer unit.

In this embodiment, for the convenience of use, the light pen is connected to the computer unit through wireless.

The working principle of the present invention will be described below by detailing the control method of the projection light control demonstration system.

Embodiment one

In this embodiment, the icon is dragged by using a light pen.

a) When the computer unit detects that the wireless communication switch has been pressed for a long time, it recognizes the screen and calculates the position of the light pen by analyzing the data of the image acquisition device. If there is no position information of the light pen at present, then ignore the control signal, otherwise record "the wireless communication switch is pressed for a long time" as the first control signal and the initial position of the light pen at this time (X0, Y0);

b) When the computer unit detects that the wireless communication switch is stopped, record the current position of the light pen (X1, Y1); if there is no current position information of the light pen, ignore the control signal; otherwise calculate (X1, Y1) and (X0, Y0 )the distance between.

If the distance between (X1, Y1) and (X0, Y0) is smaller than a predetermined threshold, set (X1, Y1) to be the same as (X0, Y0) at this time, and it is determined that no movement has occurred.

Record "the wireless communication switch is stopped being pressed" as the second control signal and the current position of the light pen (X1, Y1).

c) Send the first control signal, the second control signal, the initial position of the light pen (X0, Y0), and the current position information of the light pen (X1, Y1) to the computer unit, and the computer unit searches for the corresponding pre-stored command. In this embodiment, the pre-stored commands of the first control signal of "the wireless communication switch is pressed for a long time" and the second control signal of "the wireless communication switch is stopped pressing" are the drag commands of the corresponding objects.

The computer unit will perform an operation to drag the object (such as an icon) located at the initial position of the light pen (X0, Y0) to the current position of the light pen (X1, Y1). If the object is not recognized at the initial position of the stylus, the command is ignored; otherwise, the object is dragged.

Embodiment two

In this embodiment, the double-click opening of the object is realized.

a) When the computer unit detects that the wireless communication switch is pressed once, it recognizes the image and calculates the position of the light pen by analyzing the data of the image acquisition device. If there is no position information of the light pen at present, ignore the control signal, otherwise, record "the wireless communication switch is pressed once" as the first control signal and the initial position of the light pen at this time (X0, Y0).

b) When the computer unit detects that the wireless communication switch is pressed for the second time, record the current position of the light pen (X1, Y1); if there is no current position information of the light pen, ignore the control signal; otherwise calculate (X1, Y1) and (X0 , Y0) distance between. If the distance between (X1, Y1) and (X0, Y0) is smaller than a predetermined threshold, set (X1, Y1) to be the same as (X0, Y0) at this time, and it is determined that no movement has occurred. Record "the wireless communication switch is pressed for the second time" as the second control signal and current position information (X1, Y1).

c) Send the first control signal, the second control signal, the initial position of the light pen (X0, Y0), and the current position information of the light pen (X1, Y1) to the computer unit, and the computer unit searches for the corresponding pre-stored command. In this embodiment, when the distance between (X1, Y1) and (X0, Y0) is less than a predetermined threshold, and the first control signal "wireless communication switch is pressed once" and "wireless communication switch is pressed the second time" are generated. The second control signal of "Secondary" corresponds to the double-click open command of the object.

The computer unit will execute the operation of opening the application program corresponding to the object located at the initial position (X0, Y0) of the light pen. If the initial position of the light pen does not recognize the object, ignore the command, otherwise execute the program operation on the object.

The above embodiments are only to illustrate the technical concept and characteristics of the present invention. All equivalent changes or modifications are within the protection scope of the present invention.

Claims (10)

1. light-operated demo system of projection, it is characterized in that: comprise computer unit, be used for to screen prjection output projector, be used at screen demonstration and the light pen of controlling and the image capture device that is used for gathering light spot position on the screen, described image capture device transfers to computer unit to the image that collects, described computer unit calculates the location coordinate information that obtains luminous point by analysis image, and carries out respective action according to controlling signal.

2. the light-operated demo system of projection according to claim 1, it is characterized in that: described image capture device is arranged on the projector.

3. the light-operated demo system of projection according to claim 1 is characterized in that: described light pen is provided with for the control light pen and opens and the power switch of closing.

4. the light-operated demo system of projection according to claim 1 is characterized in that: described light pen is provided with the light source emission switch for the emission of control light source.

5. the light-operated demo system of projection according to claim 1 is characterized in that: described light pen is provided with the radio communication switch for radio communication between control and the computer unit.

6. the control method of the light-operated demo system of projection is used for as the light-operated demo system of the described projection of above arbitrary claim, it is characterized in that, comprises the steps:

A) when computer unit detects first control signal, and record light pen initial position (X0, Y0);

B) when computer unit detects second control signal, and record light pen current location (X1, Y1);

C) with first control signal, second control signal, light pen initial position (X0, Y0), (X1 Y1) sends to described computer unit to the light pen current location information, and computer unit is searched the corresponding order and carry out the operation of this order correspondence that prestores of prestoring.

7. want the control method of the light-operated demo system of 6 described projections according to right, it is characterized in that: in described step a), picture is identified and calculated the position of light pen by the data of analyzing described image capture device.

8. the control method of the light-operated demo system of projection according to claim 6 is characterized in that: described first control signal and second control signal produce by pressing or close the wireless telecommunications switch.

9. the control method of the light-operated demo system of projection according to claim 8 is characterized in that: the described wireless telecommunications switch of pressing comprises and clicks the wireless telecommunications switch, double-clicks the wireless telecommunications switch, stops to press the wireless telecommunications switch, presses the wireless telecommunications switch for a long time.

10. the control method of the light-operated demo system of projection according to claim 6, it is characterized in that: also be provided with calculation procedure before the described step 3), in described calculation procedure, calculate light pen initial position (X0, Y0) and light pen current location (X1, Y1) distance when this distance during less than a predetermined threshold value, judges that light pen is not moved.

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