KR20160067485A - Learning portable pico projector - Google Patents

Abstract

The present invention relates to a learning portable pico projector, which projects an image of an object captured by a camera in real time, converts the projected image into a file, and stores the file. The learning portable pico projector includes a mobile high-definition link (MHL) interfacing transmission data of a mobile device; a high-definition multimedia interface (HDMI) connected to a laptop to interface digital video and audio signals with a single cable; a camera input terminal receiving an image captured by the camera; and an image storage and reproduction unit projecting the image interfaced by the MHL and the HDMI to a screen by an image projecting unit, converting the image input through the camera input terminal into a file and storing the file in a storage medium while projecting the image to the screen by the image projecting unit, and reproducing the file stored in the storage medium; and the image projecting unit the image output by the image storage and reproduction unit to the screen.

Description

Learning portable pico projector}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a portable pico projector for learning, and more particularly, to a portable portable pico projector capable of projecting objects reflected in a camera in real time, and converting a projected image into an image file.

In general, a pico projector is a portable video device that projects various contents onto a beam project screen by connecting with a mobile device such as a smart phone, a tablet PC, and a notebook. It is generally rectangular and has a height of about 4 ~ 6cm. It has a rectangular cube shape that can be placed on the palm of a hand. The market for Pico projectors is growing with the increasing use of video contents through mobile devices and leisure culture such as camping.

Conventional pico projectors are connected to MHL (Mobile High-definition Link) for mobile device interface such as smart phone, and HDMI (High Definition Multimedia), which is an interface for transmitting digital image and sound signals simultaneously with one cable, Interface) to receive the image and to project it.

A conventional technique for a pico projector having such a function is disclosed in the following Patent Document 1: Korean Patent Laid-Open Publication No. 10-2010-0027715 (published on Mar. 11, 2010).

The prior art disclosed in Patent Document 1 includes first to third light sources for emitting first to third lights; An image projection unit for generating an image using the lights emitted from the light sources and projecting the generated image to a screen; A light path portion that selectively transmits or reflects the lights to be emitted toward the image projection portion and leaks a part of the lights; And a virtual keyboard for projecting and displaying a keyboard image provided with one or more keys using light leaked from the optical path unit. The virtual keyboard function is provided to the user using the light source of the pico projector.

Korean Patent Publication No. 10-2010-0027715 (Published Nov. 11, 2010)

However, the conventional pico projectors and the related arts merely have a simple function of projecting only images received through the MHL and HDMI interfaces through the beam project screen, and can acquire an external image, convert the acquired image into a specific file, The ability to store on media has the disadvantage of being impossible.

Accordingly, the present invention has been proposed in order to overcome the above-described problems occurring in the conventional pico projector and the related art, and it is an object of the present invention to provide an image processing method and apparatus capable of projecting objects reflected in a camera in real time, The present invention relates to a portable pico projector for learning.

Another object of the present invention is to provide a portable pico projector for learning which aims to increase various learning contents and image activity through real-time projection and storage function of camera photographs in individuals and small groups (classrooms and companies).

In order to achieve the above object, the portable portable pico projector according to the present invention comprises: a mobile high-definition link (MHL) for interfacing transmission data of a mobile device; High Definition Multimedia Interface (HDMI) that interfaces with a laptop to simultaneously interface digital video and audio signals with a single cable; A camera input terminal for receiving an image photographed through a camera; Projecting the image interfaced with the MHL and the HDMI through the image projection unit, projecting the image input through the camera input unit onto the screen through the image projection unit, converting the image into a file form, storing the converted image in a storage medium, An image storage and reproduction unit for reproducing an image file stored in a storage medium; And an image projection unit for projecting the image output from the image storage and reproduction unit onto a screen.

In addition, the portable portable pico projector according to the present invention further includes a power supply unit for supplying driving power through a built-in battery.

In addition, the portable portable pico projector according to the present invention further includes an illumination unit that performs an illumination function using the power supplied from the power source unit.

The image storage and playback unit may include an image acquisition unit for acquiring images input through the MHL (High-Definition Multimedia Interface) and a high-definition multimedia interface (MHP) and a camera input terminal; An image reproducing unit for controlling reproduction of the image acquired by the image acquiring unit; And an image storage unit for storing the real-time image input through the camera input end of the image acquired by the image acquisition unit in the form of a file.

The image reproducing unit reproduces the image input through the USB terminal or the SD card, and transmits the reproduced image to the image projecting unit.

The image storage unit includes a parser for parsing streaming image data input through a camera input terminal output from the image acquisition unit. A framer for combining data analyzed by the parser on a frame basis; An image compressing unit for compressing the framed image data in the framer; And a filer for converting the image data compressed by the image compression unit into a file for storage in a storage medium and storing the converted file in a storage medium.

The image compressing unit compresses the frame image data using a motion picture eapert groups (MPEG) compression standard.

The file generator converts the compressed image data into a JPG file or an M-JPG file.

The image projecting unit may include an optical engine for projecting a reproduced image onto a screen.

The image projection unit may further include a high resolution panel for increasing the resolution of the reproduced image.

According to the present invention, objects reflected on a camera can be projected in real time, and a projected image can be converted and stored in a storage medium in the form of a file, thereby enhancing various learning contents and video activities.

In particular, it has the advantage of improving the functions of the pico projector through functions such as image acquisition and projection, storage and file playback.

1 is a configuration diagram of a portable portable pico projector according to a preferred embodiment of the present invention;
FIG. 2 is a block diagram of an embodiment of the video storage and playback unit of FIG. 1;
FIG. 3 is a block diagram of an embodiment of the image storage unit of FIG. 2. FIG.

Hereinafter, a portable portable pico projector according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a portable portable pico projector according to a preferred embodiment of the present invention and a configuration of a connected device.

The portable pico projector for learning and the peripheral device to be connected according to the preferred embodiment of the present invention includes a mobile device 10 such as a smart phone, a laptop 20, a camera 30, a video projection screen 40 and a pico projector 50 ).

The pico projector 50 includes a mobile high definition link (MHL) 51, a high definition multimedia interface (HDMI) 52, a camera input terminal 53, an image projecting unit 54, a power source unit 55, And a playback unit 56, an SD card 57, a USB terminal 58, and an illumination unit 59.

The MHL 51 is a part for interfacing transmission data of a mobile device, and the HDMI 52 is a part connected to a laptop or the like to simultaneously interface a digital image and an audio signal with one cable. These interface parts are basically implemented in a typical pico projector.

The present invention adds a camera input terminal 53 for receiving a real-time image photographed by a photographing device such as the camera 30, in addition to the basic interface as described above.

The power supply unit 55 serves to supply driving power through a built-in battery, and the lighting unit 59 performs a lighting function using the power supplied from the power supply unit 55. Here, the lighting function means a lighting function such as a lantern or a flash.

The image projecting unit 54 projects the image output from the image storing and reproducing unit 56 to the screen 40. The image projecting unit 54 includes an optical engine for projecting the reproduced image onto the screen 40. [ In addition, the image projecting unit 54 further includes a high-resolution panel 54a for increasing the resolution of the reproduced image.

The SD card 57 is a storage medium for storing images, and the USB terminal 58 plays a role of transmitting a storage file or receiving a file through a USB port.

The image storage and playback unit 56 projects an image interfaced with the MHL 51 and the HDMI 52 to the screen 40 through the image projection unit 54 and inputs Projected on the screen 40 through the image projecting unit 54 and converted into a file form and stored in a storage medium, and plays an image file stored in the storage medium.

As shown in FIG. 2, the image storage and playback unit 56 is connected to the MHL 51, the HDMI (High Definition Multimedia Interface) 52 and the camera input 53, An image acquiring unit 61 for acquiring a video image; An image reproducing unit 62 for controlling the reproduction of the image acquired by the image acquiring unit 61; And an image storage unit 63 for storing the real-time image input through the camera input end 53 of the image acquired by the image acquisition unit 61 in the form of a file.

Here, it is preferable that the image reproducing unit 62 reproduces the image input through the USB terminal 58 or the SD card 57, and transmits the reproduced image to the image projecting unit 54.

3, the video storage unit 63 includes a parser 71 for parsing streaming-type video data input through the camera input terminal 53 output from the video obtaining unit 61, ); A framer 72 for combining the parsed data in the parser 71 on a frame-by-frame basis; An image compression unit 73 for compressing image data framed by the framer 72; And a filing unit 74 for converting the image data compressed by the image compression unit 73 into a file for storage on a storage medium and storing the converted file in a storage medium.

Here, the image compressing unit 73 preferably compresses the image data framed by using the MPEG (motion picture eapert groups) compression standard, and the filer 74 compresses the compressed image data into a JPG file or an M-JPG file .

The operation of the portable pico projector for learning according to the preferred embodiment of the present invention will be described in detail as follows.

First, when the power switch of the pico projector 50 is turned on, the power source of the battery built in by the power source unit 55 is discharged, and the driving power is supplied. Although only the battery power source built in the power source is mentioned here, the present invention is not limited thereto, and it is also possible to use the commercial AC power source as the power source through the power charging terminal (input terminal). To this end, the power supply unit 55 preferably includes a rectifying circuit and a charging circuit.

When the user turns on the lighting switch to use the pico projector 50 as a lighting device such as a lantern or a flash after the power is supplied, the lighting unit 59 supplies power from the lighting unit 55 ) To provide a lighting role. Here, it is preferable that the illumination unit 59 is constructed and operated in the same manner as the flash function in a device such as a smart phone.

After power is supplied, video data transmitted from a mobile device such as a smart phone is input to the pico projector 50 via the MHL 51, and video data transmitted from a device such as a laptop is transmitted to the HDMI 52 And is input to the pico projector 50 through the pico projector 50.

The image storing and reproducing unit 56 of the pico projector 50 processes the input image data through a normal image processing technique and then transmits the processed image data to the image projecting unit 54. The image projecting unit 54 transmits the image data, (40). This image projection process is the same as that of a normal pico projector.

A characteristic feature of the present invention is that a general pico projector as described above acquires a real-time image photographed through a camera 30 and projects it to the screen 40, and simultaneously stores it in a storage medium and stores it in a storage medium. Can be reproduced and projected onto the screen (40).

For example, when a group such as a school or a company needs to store images for explanation and explanation of specific objects for learning, teaching, lecture, etc., the camera 30 for real-time object shooting is connected to the camera input end 53 do. Here, the camera 30 may use an independent camera or a camera implemented in a mobile device such as a smart phone.

An image photographed by the camera 30 is input through the camera input terminal 53 and is transmitted to the image storage and playback unit 56. [ The image acquisition unit 61 of the image storage and playback unit 56 receives the streaming image input through the camera input stage 53 and transmits it to the image playback unit 62 and the image storage unit 63 simultaneously . The image reproducing unit 62 processes an image transmitted through a normal image processing technique and transmits the processed image to the image projecting unit 54 as a reproduced image. The image projecting unit 54 projects an image transmitted to the screen 40 using an internal optical engine. In this case, the resolution of the image can be increased by using the high resolution panel 54a. The resolution indicates how many pixels are formed on each surface of the display device. The resolutions are roughly classified into QVGA (320 × 240), WVGA (800 × 480), QHD (960 × 540), HD (1280 × 720), and Full HD (1920 × 1080). Here, the present invention implements HD resolution through the high resolution panel 54a.

Next, the image storage unit 63 stores the image data acquired through the camera 30 into a file format suitable for the storage medium and stores the image data in the storage medium.

For example, as shown in FIG. 3, a parser 71 parses streaming-type image data input through the camera input terminal 53 output from the image obtaining unit 61. That is, the relationship between the constituent parts of the input image data is identified using a program such as a classification analysis program, and at the same time, the meaning of the inquiry is analyzed.

Next, the framer 72 combines the data interpreted by the parser 71 on a frame-by-frame basis. That is, the moving picture data is processed by a still picture (frame) unit operation. It is also possible to take a series of multi-frame pictures with a digital camera and save them as a single JPG file so that each frame can be quickly and continuously reproduced so that it looks like a mini-movie.

The image data processed in units of frames is compressed by a standard compression technique such as MPEG in the image compression unit 73. [ That is, a large amount of image data is reduced to predetermined data. The image compression method is distinguished by lossy compression and lossless compression depending on whether or not all information of the original image is retained in restoration after image compression. Lossless compression is a compression method in which an image reconstructed from a compressed image is completely matched with an original image by completely performing coding and decoding of the image, and lossy compression increases the compression rate by eliminating redundant or relatively less important information in the image Compression method.

The compressed image data is transferred to a filer 74. The filer 74 converts the compressed image data into a file for storage on a storage medium and stores the converted file in a storage medium. Here, the filer 74 preferably converts the compressed image data into a JPG file or an M-JPG file. The converted image file is stored in the storage medium which is stored in the SD card 57 or connected via the USB terminal 58. [

According to another aspect of the present invention, an image file stored in the storage medium can be reproduced and projected onto the screen. For example, an image file inputted through the USB terminal 58 or an image file transmitted through the SD card 57 is reproduced by the image reproducer 62 and transmitted to the image projecting unit 54. The image projecting unit 54 converts the transferred image into a high-resolution image and projects it on the screen 40. [

In other words, according to the present invention, a terminal for receiving a camera image is added to a general pico projector to receive an image photographed by a camera in real time, processed and projected on a screen, and made into an appropriate image file ≪ / RTI > It is also possible to reproduce the image file stored in the storage medium and project it on the screen.

Thus, when lecturing or teaching at a company or a school, a lecture or an instruction about an object photographed by a camera in real time can be conveniently made to a plurality of screens through a screen, and real time image data May be stored in a storage medium. If it is transmitted over a communication medium to a remote location, remote lectures and education can be conveniently performed.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is effectively applied to a technique of projecting an image photographed in real time through a camera through a pico projector on a screen and storing it on a storage medium.

30: Camera
40: Screen
50: Pico projector
51: MHL
52: MIDI
53: Camera input
54: Image projection section
54a: High resolution panel
55:
56; The image storage and playback unit
61:
62:
63: Image storage unit
71: Parser
72: Framer
73:
74: Fileizer

Claims (10)

MHL (Mobile High-definition Link) for interfacing transmission data of a mobile device;
High Definition Multimedia Interface (HDMI) that interfaces with a laptop to simultaneously interface digital video and audio signals with a single cable;
A camera input terminal for receiving an image photographed through a camera;
Projecting the image interfaced with the MHL and the HDMI through the image projection unit, projecting the image input through the camera input unit onto the screen through the image projection unit, converting the image into a file form, storing the converted image in a storage medium, An image storage and reproduction unit for reproducing an image file stored in a storage medium; And
And an image projecting unit for projecting the image output from the image storage and playback unit to a screen.
The portable portable pico projector according to claim 1, further comprising a power supply unit for supplying driving power through the built-in battery.
The portable pico projector for learning according to claim 2, further comprising a lighting unit performing a lighting function using power supplied from the power supply unit.
[2] The apparatus of claim 1, wherein the image storage and playback unit comprises: an image acquisition unit for acquiring an image input through a mobile high-definition link (MHL), a high definition multimedia interface (HDMI) An image reproducing unit for controlling reproduction of the image acquired by the image acquiring unit; And an image storage unit for storing a real-time photographed image input through a camera input end of the image acquired by the image acquisition unit into a file form and storing the file.
The portable portable pico projector according to claim 4, wherein the image reproducing unit reproduces an image input through a USB terminal or an SD card, and transmits the reproduced image to the image projecting unit.
[6] The image processing apparatus of claim 4, wherein the image storage unit comprises: a parser for parsing streaming image data input through a camera input terminal output from the image obtaining unit; A framer for combining data analyzed by the parser on a frame basis; An image compressing unit for compressing the framed image data in the framer; And a filer for converting the image data compressed by the image compression unit into a file for storage in a storage medium and storing the converted file in a storage medium.
7. The portable pico projector for learning as claimed in claim 6, wherein the image compressing unit compresses framed image data using a motion picture eapert groups (MPEG) compression standard.
7. The portable pico projector for learning as claimed in claim 6, wherein the filer converts the compressed image data into a JPG file or an M-JPG file.
The portable pico projector for learning according to claim 1, wherein the image projecting unit includes an optical engine for projecting a reproduced image onto a screen.
[12] The portable portable pico projector according to claim 9, wherein the image projecting unit further includes a high resolution panel for increasing the resolution of the reproduced image.

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