KR20160054441A

KR20160054441A - Radio Data Transmission and Reception System for Virtual Reality

Info

Publication number: KR20160054441A
Application number: KR1020160050720A
Authority: KR
Inventors: 김성환
Original assignee: 울산대학교 산학협력단
Priority date: 2016-04-26
Filing date: 2016-04-26
Publication date: 2016-05-16
Also published as: KR101867664B1

Abstract

The present invention relates to an apparatus and an access technology to produce a booth used for virtual reality, implement a transmission/reception apparatus in the booth, and facilitate real-time data communications with a head mounted display (HMD). A data communications system for virtual reality according to an aspect of the present invention comprises: a data transmission device transmitting information by visible light communications; a light detector receiving the information by detecting a plurality of rays of light resulting from the visible light communications; and a head mounted display receiving the information from the light detector and displaying the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless data transmission /

The present invention relates to a wireless data transceiver for virtual reality.

More specifically, the present invention relates to a device and a connection technology for creating a booth used in a virtual reality (VR), implementing a transmitting / receiving device in a booth, and communicating data with an HMD in real time.

In addition, the present invention can be applied to a short-distance communication method such as visible light communication, Wi-Fi, and Bluetooth in a communication method between a booth and a head mounted display (HMD) , And a device and a connection technology capable of maximizing the system throughput by varying the state, size and number of channels.

Recently, various electronic devices in a form that can be worn directly on the body are being developed. These devices are commonly referred to as wearable electronic devices.

As an example of a wearable electronic device worn on a part of a body, there is a head-mounted display device (HMD) mounted on a head or head of a user to display an image, a smart glass, And may include various forms that are removable to a part of the human body or clothing, including, but not limited to, wristbands, smart wristbands, contact lens type devices, ring type devices, shoe type devices, The HMD may be formed into a goggle shape or an eyeglass shape.

As the wearable electronic device is directly worn on the body, portability and user's accessibility can be improved.

The display of the head-mounted display device can output an image at a position facing the user's eyes, and a lens can be positioned between the user and the display to correct the user's visual acuity.

At least one of see-through functions that provide a see-through or virtual reality (VR) that provides augmented reality (AR) through a head-mounted display device Can be provided.

The see-through function allows the user to transmit the object or virtual object or object to the user through the display or the transparent / translucent lens, for example, in the case of the Google glass, Can generally mean the function of providing, using visual or diverse sensory means.

This see-through function allows the user to provide additional information and images for actually visible objects and the like.

In another embodiment, additional information may be provided to the user using a display, a lens, a hologram, or the like.

The time-closed function is provided by a separate display, for example, in the case of Sony's HMZ, in which two displays are placed in front of the user's eyes so that content (game, movie, streaming, broadcast, As shown in FIG.

This can provide the user with the impression by using the independent screen.

Such a head-mounted display device may perform communication with an external electronic device.

External electronic devices include, for example, a smartphone, a tablet personal computer, a mobile phone, a videophone, an e-book reader, a desktop personal computer, Such as a laptop personal computer, a netbook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), an MP3 player, a mobile medical device, a camera, or a wearable device : At least one of a head-mounted-device (HMD) such as electronic glasses, an electronic garment, an electronic bracelet, an electronic necklace, an electronic app apparel, an electronic tattoo, or a smart watch.

On the other hand, a head mount display device for existing virtual reality (VR) has to be connected to an external device by wire for large data transmission, and thus there is a limitation in the activity.

In addition, since it is necessary to transmit a large amount of data, although there is a need to minimize a data transmission amount and a transmission delay time in a short distance access method, there is a problem that a solution thereof can not be presented.

Therefore, a solution for solving such a problem is required.

(1) International Application No. PCT / US2013 / 076705 (2) International Application No. PCT / US2006 / 040769

The present invention proposes a wireless data transceiver for virtual reality.

Specifically, the present invention proposes a device and a connection technology to a user who can create a booth used in a virtual reality (VR), implement a transmitting / receiving device in a booth, and communicate data in real time with the HMD.

In addition, the present invention can be applied to a short-distance communication method such as visible light communication, Wi-Fi, and Bluetooth in a communication method between a booth and a head mounted display (HMD) , And a device and a connection technology capable of maximizing the system throughput by varying the state, size, and number of channels.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

According to an aspect of the present invention, there is provided a virtual reality data communication system including: a data transmission apparatus for transmitting information using visible light communication; A photodetector for detecting a plurality of lights according to the visible light communication and receiving the information; And a head mount display device for receiving and playing the information from the photodetector.

In addition, the data transfer device, the photodetector, and the head-mounted display device may be installed in one booth.

The server may further include a server for transmitting the information to the data transmission apparatus.

The plurality of photodetectors may detect at least a part of a plurality of lights according to the visible light communication, and may combine the lights detected by the plurality of photodetectors to generate the information. As shown in FIG.

Further, the optical pickup apparatus may further include a convex lens positioned between the data transmission device and the photodetector, and the convex lens may collect the plurality of lights input at a plurality of angles into the photodetector.

In addition, a predetermined short distance communication technology is additionally used between the data transmission device and the optical detector, and the short distance communication technology may be Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), UWB Ultra Wideband) and ZigBee.

In addition, the data transmission apparatus may determine whether or not the information is transmitted to the optical detector within a predetermined time, and if not, transmit at least one of the local area communication technologies except for the visible light communication technology And can communicate with the photodetector.

When a plurality of channels are used between the data transmission apparatus and the optical detector, the data transmission apparatus divides the information into a plurality of information packets, and transmits each of the plurality of information packets through the plurality of channels It can be transmitted to the photodetector.

The local communication technology may be Bluetooth, RFID (Radio Frequency Identification), IrDA (infrared data association), UWB (Ultra Wideband) communication, And ZigBee.

According to another aspect of the present invention, there is provided a data communication method for a virtual reality, including: a first step of transmitting data using a Visible Light Communication; A second step of the photodetector detecting a plurality of lights according to the visible light communication and receiving the information; And a third step in which the head-mounted display device receives and plays the information from the photodetector.

A second step of detecting at least a part of the plurality of light beams in accordance with the visible light communication, wherein the plurality of photodetectors detect a plurality of photodetectors; And (2-2) a signal combiner combines the light detected by the plurality of photodetectors to generate the information.

In addition, the method may further include, between the first step and the second step, collecting, by the optical detector, the plurality of lights into which the convex lenses located between the data transmission device and the photodetector are input at a plurality of angles .

In addition, the data transmission apparatus may further include a first-second step of determining whether the information is transmitted to the photodetector within a predetermined time between the first step and the second step; And performing communication with the photodetector using at least one communication technology other than the visible light communication technology among the short-range communication technologies when the information is not transmitted.

(1-6), when the plurality of channels are used between the data transmission device and the optical detector, the data transmission device separating the information into a plurality of information packets between the first step and the second step; And (1-8) transmitting each of the plurality of information packets to the photodetector through each of the plurality of channels.

The present invention can provide a user with a wireless data transmission / reception device for a virtual reality.

Specifically, the present invention can provide a user with a device and a connection technology capable of producing a booth used in a virtual reality (VR), implementing a transceiver in a booth, and communicating data with the HMD in real time .

In addition, the present invention can be applied to a short-distance communication method such as visible light communication, Wi-Fi, and Bluetooth in a communication method between a booth and a head mounted display (HMD) , It is possible to provide a user with a device and a connection technology capable of maximizing the system throughput by changing the state, size and number of channels.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

1A to 1C are views for explaining visible light communication applicable to the present invention.
2 shows an example of a block diagram of a data transmission apparatus related to the present invention.
Fig. 3 shows an example of a block diagram of a wireless data transmitting and receiving apparatus for virtual reality proposed by the present invention.
4 shows an example of a block diagram of a wireless data transmitting and receiving apparatus using a plurality of optical detectors and signal combiners in connection with the present invention.
FIG. 5 is a block diagram illustrating a process of transmitting and receiving a virtual reality wireless data transmission / reception apparatus through a coder and a decoder, according to the present invention.
6 is a block diagram of a wireless data transmitting and receiving apparatus for a virtual reality in which a method of transmitting a plurality of packets in a case where there are N multiple channels is illustrated.
FIG. 7 is a flowchart illustrating an example of a process of communicating data using a wireless data transmitting / receiving device for a virtual reality according to the present invention.
8 is a flowchart for explaining another example of a process of communicating data using the wireless data transmitting and receiving device for virtual reality according to the present invention.
9 is a flowchart for explaining another example of the process of communicating data using the wireless data transmitting and receiving apparatus for virtual reality according to the present invention.
FIG. 10 is a flowchart for explaining another example of a process of communicating data using the wireless data transmitting and receiving apparatus for virtual reality according to the present invention.

HMD (Head Mounted Display) is an image display device that allows you to enjoy large images on your head like glasses. It is a next-generation video display device that can be used for medical devices used for surgery or diagnosis, while enjoying video on a large screen while carrying it.

When humans see the world through other mediums, the desire to look similar to reality has been constantly growing. Since the Renaissance era, the technique called Perspective Perspective has emerged, and it has become more realistic to move the three-dimensional world in two dimensions. In the mid-1800s, as photographic development / printing technology, such as the Daggero type and the Kalo type, was born, it began to record the world with new media instead of pigments and inks.

As we move into the digital world, humans can see the world in a more vivid way than in the past. With the development of image sensors, you can create realistic digital files and even 3D photos and videos. Display devices that display digital files are also developing to satisfy human needs.

Today, the renaissance of display devices is called HMD (Head Mounted Display). HMD is a display device in the form of a head. Unlike a large screen that can be seen on a TV or monitor in a living room or a desk or a living room, if you put a device with a small display on your head, it gives the effect of looking like a huge screen through the screen in front of you.

If the HMD that had appeared in the past was merely the level that the monitor was attached to in front of the eyes, today HMD has developed into a higher level device through various sensor technology and wireless technology. Oculus lift is a typical device made by Oculus VR (now a subsidiary of Facebook). Unlike conventional HMDs, Oculus Lift recognizes the user's movement through the sensor and reflects it on the screen. For example, when the user turns his head to the left, the scene displayed on the screen also moves to the left. That is, the head movement of the user can be reflected in the content manipulation. This technology is particularly helpful in enhancing the immersion and realism of game contents.

The Morpheus released by Sony is similar to the Oculus lift. That is, the HMD is an output device and an input device that recognizes and reflects a user operation. Morpheus can be used with Sony's video game console PlayStation 4. In other words, it has more content compared to existing HMD. In addition, the various input devices of the PlayStation 4 can be used to recognize the movement of the user's body, and the oculus lift can realize the movement of missed sounds.

If the two HMDs mentioned above were virtual reality-centric devices, Microsoft announced that the 'Hollolens' is an augmented reality HMD. It is the concept of putting graphics on the real world and interacting with the computer graphics. For example, if you look at the wall with a holographic lens, you will see a document file, and you can scroll the document by hand. It can also be used in games. When you look at Microsoft's concept images, the utilization is endless. For example, a 3D designer can float a 3D model in the air and turn it around by hand. The game is literally 'New World'. In the concept video, a man uses a lens alone, turns his living room into a mine craft space, and behaves as if it were the main character in the game.

Now, HMDs that do not even need a display have begun to emerge. Instead of mounting the display, the user's smartphone is used as a display. The smart phone is a device equipped with a high-resolution display, a wireless communication device, and various sensors. There is also a storage device for storing contents, and there is an app marketplace where contents can be purchased. In other words, it has most parts and functions necessary for HMD.

Samsung Electronics, in cooperation with Oculus VR in 2014, unveiled Gear VR, which combines Galaxy Note 4 with its smartphone. The core parts and display are replaced with Galaxy Note 4, and the head-worn device is a gear VR. Gear VR has several advantages over the existing Oculus lift. First is the resolution. Ouclus lifts the full HD content screen in half and displays 960 x 1,080 on the right and left displays. On the other hand, Galaxy Note 4 has a default resolution of QHD, which can be divided into halves to show 1,280 x 1,440 in each eye.

Another advantage is that you do not need a line. In the case of the existing Oculus lift, a cable that can receive video information by connecting with the source device (PC, console, etc.) is needed. Gear VR, on the other hand, does not need a separate cable because it directly executes the contents stored in Galaxy Note 4.

LG Electronics introduced VR for G3, an exclusive HMD for LG G3, in early 2015 using the 'card board'. The cardboard is a low-cost / entry-level virtual reality device that Google has released. If you have about $ 20 in material cost and dexterity, you can download the design and make it yourself. In general, VR for G3 is made of plastic and supplied to G3 buyers free of charge.

It does not have built-in sensors like the Oculus lift, but it replaces gyroscopes and accelerometers in smartphones. When you wear it, you can watch Google Street View by turning your head, not the touch or the mouse, and you can watch videos floating in virtual space by accessing video streaming service such as YouTube. In particular, since Google has released its application development environment, it is likely that many applications will be available in the future.

In order for the HMD (Head Mounted Display) to display specific information, a step of storing information in advance or a step of transmitting / receiving information from the outside is indispensably required.

In addition, in the present invention, Visible Light Communication, which is a type of a short distance communication method, is applied in a manner that the HMD communicates.

Therefore, prior to a specific description of the present invention, a data transmission apparatus 1100 capable of transmitting and receiving information with visible light communication and HMD will be described in detail.

First, visible light communication will be described.

LED Visible Light Communication (VLC) technology is a technology that wirelessly transmits information to the light of LED lights. It turns on and off with the light generated by the digital semiconductor, turns the light on as digital information 1, And transmits information with digital information 0. A person can simultaneously realize the function of lighting and the function of wireless communication by using the principle of recognizing the visible light as the continuous light if the light is repeatedly turned on and off more than 200 times per second.

Features of LED visible light communication (VLC) technology, LED visible light corresponds to the wavelength of 380nm at 780nm, can communicate at the same time with the light, uses the existing industrial infrastructure, It is possible to realize a ubiquitous environment capable of providing specialized services.

Also, it can be utilized as a green environment friendly indoor network wireless communication which is not related to the electromagnetic wave controversy of existing wireless communication technology (802.11b / g: near 2.45 GHz) or RFID (860 MHz ~ 960 MHz and 2.45 GHz).

1A to 1C are views for explaining visible light communication applicable to the present invention.

LED lights are emitted by digital semiconductors and are repeatedly turned on and off at high speed. It is a technology that transmits information to light by turning on light as digital information 1 and turning off light as digital information 0. It is a principle to recognize visible light as continuous light when repeatedly turning on and off more than 200 times per second It is possible to simultaneously realize the function of the illumination and the function of the wireless communication.

Referring to FIG. 1A, an LED converts electricity into light and transmits and receives the LED using a flashing (on-off switching) communication modulation of an LED and a PD (photodiode) at a speed of about 200 nanometers.

At this time, if the person blinks more than 200 per second, the blinking due to communication is recognized because the blinking is not recognized and the blinking is perceived to be continuously turned on. However, the function of the lighting can be maintained because it is recognized as being continuously turned on.

Referring to FIG. 1B, the audio frequency band corresponds to 20,000 Hz at 20 Hz, and IrDA using infrared wavelength, IEEE 802.11n of 2.4 Hz, 802.15.1 Blue tooth, IEEE 802.15.3c 60 GHz, 802.15. 4 Zigbee UWB and so on.

The visible light wireless communication uses the wavelength most similar to IrDA using 870-900 nm, but it is characterized by being able to communicate simultaneously with the illumination.

Visible light wireless communication uses visible light of LED light, so it can visually confirm the wireless communication area. Meanwhile, other wireless communication devices such as ZigBee, IrDA, and Bluetooth use invisible frequencies and usually use ISM industrial scientific and medical equipment.

Referring to FIG. 1C, the advantage of the visible light communication technology is that various services can be performed anywhere using the existing industrial infrastructure using visible light.

In other words, visible light wireless communication technology, which is suitable for implementing environmentally adaptive ubiquitous environment anytime and anywhere, can be wirelessly communicated using an infrastructure in which conventional lighting methods such as incandescent lamps and fluorescent lamps are converted into LED lights, It can be seen as a new convergence technology that adds communication functions.

Next, a data transmission apparatus 1100 capable of transmitting and receiving information with the HMD will be described.

2 shows an example of a block diagram of a data transmission apparatus related to the present invention.

FIG. 2 shows an example of a block diagram of an automatic interception system using speech recognition applied to the present invention.

Hereinafter, for convenience of explanation, the automatic interception system using speech recognition according to the present invention will be referred to as a data transmission apparatus.

The data transmission apparatus 1100 includes a wireless communication unit 1110, an audio / video input unit 1120, a user input unit 1130, a sensing unit 1140, an output unit 1150, a memory 1160, A controller 1180, a battery 1190, and the like.

However, the components shown in Fig. 2 are not essential, so that a data transfer device having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 1110 may include one or more modules that enable wireless communication between the data transmission device 1100 and the wireless communication system or between the data transmission device 1100 and the network in which the data transmission device 1100 is located . For example, the wireless communication unit 1110 may include a broadcast receiving module 111, a mobile communication module 1112, a wireless Internet module 1113, a short range communication module 1114, a location information module 1115, .

The broadcast receiving module 1111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may be a server for generating and transmitting broadcast signals and / or broadcast-related information, or a server for receiving broadcast signals and / or broadcast-related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast- The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 1112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 1111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only A digital broadcasting system such as DVB-CB, OMA-BCAST, or Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast receiving module 1111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 1111 may be stored in the memory 1160.

The mobile communication module 1112 transmits and receives a radio signal to at least one of a base station, an external data transmission device, and a server on a mobile communication network. The wireless Internet module 1113 refers to a module for wireless Internet access, and may be built in or enclosed in the data transmission apparatus 1100.

WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as the technology of the wireless Internet.

The short-range communication module 1114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as the short range communication technology.

Also, the short-range communication module 1114 may perform the above-described visible light wireless communication.

The position information module 1115 is a module for obtaining the position of the data transmission device 1100, and a representative example thereof is a Global Position System (GPS) module. According to the current technology, the GPS module 1115 calculates distance information and accurate time information from three or more satellites, and then applies a trigonometric method to the calculated information to generate a three-dimensional string of latitude, longitude, The location information can be accurately calculated. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module 1115 can calculate speed information by continuously calculating the current position in real time.

Referring to FIG. 2, an A / V (Audio / Video) input unit 1120 is for inputting an audio signal or a video signal, and may include a camera 1121 and a microphone 1122. The camera 1121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display portion 1151. [

The image frame processed by the camera 1121 can be stored in the memory 1160 or transmitted to the outside through the wireless communication unit 1110. [

At this time, two or more cameras 1121 may be provided depending on the use environment.

For example, the camera 1121 may include first and second cameras 1121a and 1121b for shooting 3D images on the opposite side of the display unit 1151 of the data transmission apparatus 100, A third camera 1121c for self-photographing the user may be provided in a part of the surface of the data transmission apparatus 1100 on which the display unit 1151 is provided.

In this case, the first camera 1121a is for capturing a left eye image, which is a source image of a 3D image, and the second camera 1121b may be for capturing a right eye image.

The microphone 1122 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output.

The microphone 1122 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The user input unit 1130 generates input data for controlling the operation of the data transmission apparatus by the user.

The user input unit 1130 may receive from the user a signal designating two or more contents among the displayed contents according to the present invention. A signal for designating two or more contents may be received via the touch input, or may be received via the hard key and soft key input.

The user input unit 1130 may receive an input from the user to select the one or more contents. In addition, it may receive input from a user to generate an icon associated with a function that the data transmission device 1100 can perform.

The user input unit 1130 may include a direction key, a key pad, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

Meanwhile, the speech recognition function according to the present invention can be applied at all times or selectively applied.

The normal application or selection application may be determined via the user input 1130.

The sensing unit 140 may be connected to the data transmission device 1100 such as the open / close state of the data transmission device 1100, the position of the data transmission device 1100, the presence or absence of user contact, the orientation of the data transmission device, 1100 and generates a sensing signal for controlling the operation of the data transmission apparatus 1100. [ It is also possible to sense whether the battery 1190 is powered on, whether the interface unit 1170 is connected to an external device, and the like. Meanwhile, the sensing unit 1140 may include a proximity sensor 1141.

The sensing unit 140 can recognize not only the voice input from the user as a voice for interrupting the vehicle but also the voice for interception only for the voice satisfying the specific criterion.

For example, the sensing unit 140 can recognize only the voice of a predetermined dB or more as the voice of the user.

Also, the sensing unit 140 can recognize only the voice corresponding to the preset voice pattern as the voice of the user. The preset voice pattern may be separately stored in the memory 1160. [

The output unit 1150 is for generating output related to visual, auditory or tactile sense and includes a display unit 1151, an acoustic output module 1152, an alarm unit 1153, a haptic module 154 and a projector module 1155, and the like.

The display unit 1151 displays (outputs) information to be processed in the data transmission apparatus 100. For example, when the data transmission apparatus is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the data transmission apparatus 100 is in the video communication mode or the image capturing mode, the captured image and / or the received image or UI and GUI are displayed.

In addition, the display unit 1151 according to the present invention supports 2D and 3D display modes.

That is, the display unit 1151 according to the present invention may have a configuration in which a switch liquid crystal 1151b is combined with a general display device 1151a as shown in FIG. 2 below. Then, the optical parallax barrier 50 is operated by using the switch liquid crystal 1151b to control the traveling direction of the light, so that different lights can be separated from the left and right eyes. Therefore, when a combined image of the right eye image and the left eye image is displayed on the display device 1151a, the user can see the image corresponding to each eye and feel as if the image is displayed as a three-dimensional object.

That is, under the control of the control unit 1180, the display unit 1151 drives only the display device 1151a without driving the switch liquid crystal 1151b and the optical parallax barrier 50 in the 2D display mode Performs normal 2D display operation.

The display unit 1151 drives the switch liquid crystal 1151b and the optical parallax barrier 50 and the display device 1151a under the control of the control unit 1180 in the 3D display mode, 1151a to perform a 3D display operation.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED) A flexible display, and a three-dimensional display (3D display).

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display portion 1151 may also be of a light transmission type. With this structure, the user can see an object located behind the data transmission device body through the area occupied by the display portion 1151 of the data transmission device body.

There may be two or more display units 1151 depending on the implementation of the data transmission apparatus 1100. For example, in the data transmission apparatus 100, a plurality of display units may be spaced apart or arranged integrally on one surface, and may be disposed on different surfaces, respectively.

(Hereinafter, referred to as a 'touch screen') in which a display unit 1151 and a sensor (hereinafter, referred to as 'touch sensor') that detects a touch operation form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display portion 1151 or a capacitance generated in a specific portion of the display portion 1151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller (not shown). The touch controller processes the signal (s) and transmits corresponding data to controller 1180. Thus, the control unit 1180 can know which area of the display unit 1151 is touched or the like.

The proximity sensor 1141 may be disposed within an interior region of a data transmission device that is enclosed by the touch screen or near the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 1152 can receive audio data received from the wireless communication unit 1110 or stored in the memory 1160 in a call signal reception mode, a recording mode, a voice recognition mode, and a broadcast reception mode. The sound output module 1152 also outputs an acoustic signal related to a function performed in the data transmission apparatus 1100. [ The sound output module 1152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 1153 outputs a signal for notifying the occurrence of an event of the data transmission apparatus 1100.

The alarm unit 1153 may output a signal for informing occurrence of an event in a form other than a video signal or an audio signal, for example, a vibration. In this case, the display unit 1151 and the audio output module 152 may be a type of the alarm unit 1153. The display unit 1151 and the audio output module 152 may be connected to the display unit 1151 or the audio output module 1152, .

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to vibration, the haptic module 1154 may be configured to perform various functions such as a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 1154 can be implemented not only to transmit a tactile effect through direct contact, but also to allow a user to feel a tactile effect through a muscular sensation such as a finger or an arm. The haptic module 1154 may include two or more haptic modules according to the configuration of the data transmission device 1100.

The projector module 1155 is a component for performing an image project function using the data transmission apparatus 1100. The projector module 1155 includes an image displayed on the display unit 1151 according to a control signal of the controller 1180, Images that are the same or at least partially different can be displayed on an external screen or on a wall.

Specifically, the projector module 1155 includes a light source (not shown) that generates light (for example, laser light) for outputting an image to the outside, a light source And a lens (not shown) for enlarging and outputting the image at a predetermined focal distance to the outside. Further, the projector module 1155 may include a device (not shown) capable of mechanically moving the lens or the entire module to adjust the image projection direction.

The projector module 1155 can be divided into a CRT (Cathode Ray Tube) module, an LCD (Liquid Crystal Display) module and a DLP (Digital Light Processing) module according to the type of the display means. In particular, the DLP module may be advantageous in downsizing the projector module 1151 by enlarging and projecting an image generated by reflecting light generated from a light source on a DMD (Digital Micromirror Device) chip.

Preferably, the projector module 1155 may be provided longitudinally on the side, front or back side of the data transmission device 1100. It goes without saying that the projector module 1155 may be provided at any position of the data transmission apparatus 1100 as needed.

The memory 1160 may store a program for processing and controlling the controller 1180, and may perform functions for temporarily storing input / output data. The frequency of use of each of the data may also be stored in the memory 1160. In addition, the memory unit 1160 may store data related to vibration and sound of various patterns that are output upon touch input on the touch screen.

The memory 1160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory, etc.) ), A random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- A magnetic disk, an optical disk, a memory, a magnetic disk, or an optical disk. The data transmission device 1100 may operate in connection with a web storage that performs the storage function of the memory 1160 on the Internet.

As described above, the sensing unit 140 does not recognize all of the voice input from the user as voice for interrupting the vehicle, but recognizes only the voice satisfying the specified criterion as voice for intermission, and the sensing unit 140 Can recognize only the voice corresponding to the preset voice pattern as the voice of the user.

The preset voice pattern applied here may be separately stored in the memory 1160.

The interface unit 1170 serves as a path for communication with all external devices connected to the data transmission apparatus 1100. The interface unit 1170 receives data from an external device or supplies power to each component in the data transmission apparatus 1100 or allows data in the data transmission apparatus 1100 to be transmitted to an external apparatus. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the data transmission apparatus 1100 and includes a user identification module (UIM), a subscriber identification module (SIM) (Universal Subscriber Identity Module, USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the data transmission device 1100 through the port.

The interface unit may be a path through which power from the cradle is supplied to the data transmission apparatus 1100 when the data transmission apparatus 1100 is connected to an external cradle or various command signals input from the cradle by the user And may be a path that is transmitted to the data transmission apparatus. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the data transmission apparatus is correctly mounted on the cradle.

The controller 1180 typically controls the overall operation of the data transmission device.

The control unit 1180 may include a multimedia module 1181 for multimedia playback. The multimedia module 1181 may be implemented in the control unit 1180 or may be implemented separately from the control unit 1180.

The control unit 1180 can use the sensing unit 1140 to control only the voice corresponding to the preset voice pattern to be recognized as the voice of the user.

Also, the control unit 1180 may control the sensing unit 1140 to recognize only the voice of a predetermined dB or more as a voice of the user.

Also, the control unit 1180 may control the entire system to perform intermittent switching application once or twice through voice recognition, or to apply intermittent switching to a child protection zone or bus exclusive vehicle through voice recognition.

In addition, the control unit 1180 may also perform intermittent switching application using a solid line, a dotted line, a color discrimination, a GPS, a child protection zone, and a bus dedicated vehicle.

In addition, the control unit 1180 may control the setting value of the camera and perform illumination control (brightness, etc.) of the light through speech recognition.

The specific operation of the controller 1180 will be described later with reference to FIGS. 4 and 5. FIG.

The power supply unit 1190 receives external power and internal power under the control of the controller 1180 and supplies power required for operation of the respective components.

The various embodiments described herein may be implemented in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the controller 1180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented in separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 1160 and can be executed by the control unit 1180. [

Therefore, in this specification, a wireless data transmission / reception device for virtual reality is proposed.

Specifically, in this specification, a booth used in a virtual reality (VR) is manufactured, a transmitter / receiver is implemented in a booth, and a device and a connection technology capable of communicating data with the HMD in real time are proposed to the user.

In this specification, a short-distance communication method such as visible light communication, Wi-Fi, and Bluetooth can be applied in a communication method between a booth and a head mounted display (HMD), and when there are a plurality of channels, , And a device and a connection technology capable of maximizing the system throughput by varying the state, size, and number of channels.

Fig. 3 shows an example of a block diagram of a wireless data transmitting and receiving apparatus for virtual reality proposed by the present invention.

Referring to FIG. 3, the virtual reality wireless data transmission / reception system 1 proposed by the present invention may include a head mounted display device 100, a photo detector 200, a server 300, and a data transmission device 1100 have.

In the present invention, it is proposed that the data transmission apparatus 1100 performs visible light communication. In FIG. 3, the data transmission apparatus 1100 is referred to as an LED 1100, but the present invention is not limited thereto.

Referring to FIG. 3, the virtual reality wireless data transmission / reception system 1 proposed by the present invention may exist in a certain space in the form of a booth.

However, the present invention is not limited thereto, and only the head-mounted display device 100, the optical detector 200, and the server 300 exist in a certain space in the form of a booth, and the server 300 may be located separately have.

As described above, the head-mounted display device 100 and the data transfer apparatus 1100 can communicate data through visible light communication, and data for the HMD is transmitted to the data transfer apparatus 1100 through the server 300 And the photodetector 200 provides a function of detecting information received by the data transmission apparatus 1100 and transmitting the detected information to the head mount display apparatus 100. [

For example, the present invention makes a booth for a VR that includes a head-mounted display 100, a photodetector 200, and a data transmission device 1100, and a data transmission device (LED, 1100 The data can be transmitted / received to / from the head-mounted display device 100 and the photodetector 200 through visible light communication, and data can be exchanged with the HMD in real time.

At this time, a method of transmitting data from the booth to the head-mounted display device 100 is an example of visible light communication, but Bluetooth, RFID (Radio Frequency Identification), IrDA (infrared data association) ), UWB (Ultra Wideband), ZigBee, and the like, and communication may be performed through a combination of these. Specific details thereof will be described later with reference to Fig.

In the case of using visible light communication, the data transmission apparatus 1100 is composed of an illumination part using LEDs, and the receiver is composed of a receiver composed of a photo detector (Photo Detector) 200.

In the case of the photodetector 200, a plurality of photodetectors 200 may be provided in consideration of the position with respect to the data transmission apparatus 1100.

Further, in the case of the data transmission apparatus 1100, the data transmission apparatus 1100 may be located at the top of the booth in a plurality of forms rather than a single number.

4 shows an example of a block diagram of a wireless data transmitting and receiving apparatus using a plurality of optical detectors and signal combiners in connection with the present invention.

FIG. 4A shows a structure for communicating using one photodetector 200. FIG.

4B shows a structure using a plurality of photodetectors 200a, 200b, and 200c, and includes a signal coupler for coupling a plurality of data received from a plurality of photodetectors 200a, 200b, and 200c, The photodetector 200 is formed by including the photodetector 200d in an additional configuration.

Depending on the size of the booth, the intensity of the LED 1100, the activity range, etc., the photodetector 200 may be fabricated on the basis of one or more photodetectors.

In the case of a plurality of photodetectors as shown in FIG. 4B, the signal combiner 200d divides the signals output from the plurality of photodetectors 200a, 200b, and 200c into Maximal Ratio Combining or Equal Gain Combining Gain Combining) to synthesize the signals and then transmit the signals.

Next, as shown in Fig. 4C, an embodiment in which the convex lens 200e is additionally used in addition to the photodetector 200 may be applied.

That is, since the light passing through the convex lens 200e is collected at the point where the photodetector 200 exists, light of various angles can be collected at one point where the photodetector 200 exists, It can be possible.

In addition, according to the light booth environment in which various channels such as visible light communication channel, Wifi, and Bluetooth exist, one channel is selected or a plurality of channels are selected, and data to be transmitted is divided and transmitted. On the receiving side, So that a large-capacity transmission can be made.

5 is a block diagram for explaining a process of transmitting and receiving a virtual reality wireless data transmission / reception apparatus through a coder and a decoder, according to the present invention.

Referring to FIG. 5, RS codes and convolutional codes may be used to control errors occurring in a wireless channel environment.

5A uses the block road encoder 114b for the transmitter side and FIG. 5B uses the block road decoder 150b for the receiver side.

In addition, when the channel environment is excellent, it is possible to receive data without going through the encoder 114b and the decoder 150b.

Also, if there are a plurality of channels, packets may be divided and transmitted.

In this case, the size and the number of the packets are varied according to the channel state and the transmission amount, and the system transmission amount is maximized.

6 is a block diagram of a wireless data transmitting and receiving apparatus for a virtual reality in which a method of transmitting a plurality of packets in a case where there are N multiple channels is illustrated.

Referring to FIG. 6, there is shown a concrete example of a method of maximizing a system throughput by varying the size and number of packets according to the channel state and the transmission amount in a plurality of channel states.

Furthermore, different types of local communication may be applied to each channel.

In the case of existing VR devices, since the system is transmitted in a wired form, there are restrictions on the VR experience due to the constraints of the users.

In contrast, the system (1) proposed in this specification can be configured to facilitate upgrading by considering the case of using a plurality of transmission methods in a wireless environment and replacing the transmission / reception module according to an increase in transmission / reception data transmission amount.

In addition, since large-capacity data transmission is required, it meets the needs of minimizing the amount of data transmission and the transmission delay time in a short-distance access method such as Wifi.

Particularly, the modems for visible light communication are advantageous in that they are large in capacity, easy to transmit in real time, and easily upgraded by module replacement.

Since there is no product capable of real time transmission in wireless except for a portable VR machine having a self-processing processor such as a mobile phone, if the module according to the present invention is manufactured, it can be easily replaced with a VR recently, May occur.

Hereinafter, a method for transmitting and receiving wireless data for virtual reality on the basis of the above-described configuration of the present invention will be described with reference to the drawings.

Example 1

FIG. 7 is a flowchart illustrating an example of a process of communicating data using a wireless data transmitting / receiving device for a virtual reality according to the present invention.

Referring to FIG. 7, the first step S11 of the data transmission apparatus 1100 receiving HMD data from the server 300 proceeds.

Thereafter, a step S12 is performed in which the data transmission apparatus 1100 transmits data for HMD to the outside via visible light communication.

After step S12, the photodetector 200 receives the HMD data (S13).

Thereafter, the HMD 100 receives the HMD data from the photodetector 200 (S14), and the HMD 100 plays HMD data (S15).

Example 2

8 is a flowchart for explaining another example of a process of communicating data using the wireless data transmitting and receiving device for virtual reality according to the present invention.

Referring to FIG. 8, the data transmitting apparatus 1100 receives HMD data from the server 300 (S21).

Thereafter, the data transmission apparatus 1100 performs step S22 of transmitting data for HMD to the outside through visible light communication.

In the second embodiment, it is assumed that a plurality of photodetectors 200 are provided unlike the first embodiment.

Therefore, after step S22, the step S23 of the plurality of photodetectors 200 receiving HMD data proceeds.

Thereafter, step S24 is performed in which the signal combiner 200d receives the data from the plurality of photodetectors 200 and combines them.

When the signal combiner 200d transmits the HMD data to the HMD 100 (S25), the HMD 100 plays the HMD data (S26).

Example 3

9 is a flowchart for explaining another example of the process of communicating data using the wireless data transmitting and receiving apparatus for virtual reality according to the present invention.

Referring to FIG. 9, the step S31 of receiving the data for the HMD from the data transmission apparatus 1100 from the server 300 is performed first.

Thereafter, the data transfer apparatus 1100 proceeds to step S32 where the HMD data is divided into a plurality of data packets.

After step S32, the data transmission apparatus 1100 performs a step S33 of transmitting a plurality of data packets to the outside using at least one of the plurality of short-distance communications.

The plurality of short-range communications that are applied in step S33 include Visible Light Communication, Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB) .

Thereafter, the step S34 of the plurality of photodetectors 200 receiving the plurality of data packets proceeds and the step S35 in which the signal combiner 200d receives the data from the plurality of photodetectors 200 and combines them It proceeds.

When the signal combiner 200d transfers the HMD data to the HMD 100 (S36), the HMD 100 plays the HMD data (S37).

Example 4

FIG. 10 is a flowchart for explaining another example of a process of communicating data using the wireless data transmitting and receiving apparatus for virtual reality according to the present invention.

Referring to FIG. 10, the first step S41 of the data transmission apparatus 1100 receiving data for HMD from the server 300 proceeds.

Thereafter, a step S42 is performed in which the data transmission apparatus 1100 transmits data for HMD to the outside via visible light communication.

In the fourth embodiment, step S43 is further performed to determine whether or not the HMD data has been transmitted within the predetermined time via the visible light communication after step S42, unlike the other embodiments.

If the data is not transmitted within a predetermined time, it is determined that the communication state is bad, and the step S44 of transmitting data for the HMD to the outside using a communication method other than the visible light communication among the plurality of short-distance communication methods is performed .

That is, at least a part of Bluetooth, RFID (Radio Frequency Identification), IrDA (infrared data association), UWB (Ultra Wideband) and ZigBee may be used except Visible Light Communication.

Thereafter, the step S45 of receiving the HMD data for the photodetector 200 proceeds, and the HMD 100 receives the HMD data from the photodetector 200 (S46), and the HMD 100 (Step S47) in which the HMD data is played.

On the other hand, when there are a plurality of users, a plurality of HMDs 100 can be applied, and users of a plurality of HMDs 100 playing the same HMD data can configure a network to perform specific games, purposes, and the like Do.

In the case where the structure and method of the present invention are applied, a booth used for a virtual reality (VR) is manufactured, a transmitter / receiver is implemented in a booth, an apparatus and an apparatus Technology can be provided to the user.

The above-described embodiments of the present invention can be implemented by various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of hardware implementation, the method according to embodiments of the present invention may be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs) , FPGAs (Field Programmable Gate Arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, the method according to embodiments of the present invention may be implemented in the form of a module, a procedure or a function for performing the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foregoing description of the preferred embodiments of the invention disclosed herein has been presented to enable any person skilled in the art to make and use the present invention. While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. For example, those skilled in the art can utilize each of the configurations described in the above-described embodiments in a manner of mutually combining them. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that do not have an explicit citation in the claims may be combined to form an embodiment or be included in a new claim by amendment after the filing.

Claims

A data transmission device for transmitting information by using visible light communication;
A photodetector for detecting a plurality of lights according to the visible light communication and receiving the information; And
And a head mount display device for receiving and playing the information from the photodetector.

The method according to claim 1,
Wherein the data transmission device, the photodetector, and the head-mounted display device are installed in one booth.

The method according to claim 1,
And a server for transmitting the information to the data transmission apparatus.

The method according to claim 1,
The photodetector includes a plurality of photodetectors,
Wherein the plurality of photodetectors detect at least a part of a plurality of lights according to the visible light communication,
And a signal combiner for combining the lights detected by the plurality of photodetectors to generate the information.

The method according to claim 1,
And a convex lens positioned between the data transmission device and the photodetector,
Wherein the convex lens collects the plurality of lights input at a plurality of angles with the optical detector.

The method according to claim 1,
A predetermined local communication technique is additionally used between the data transmission device and the optical detector,
Wherein the short range communication technology includes Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), ultra wideband (UWB), and ZigBee.

The method according to claim 6,
The data transmission apparatus includes:
Determining whether the information has been transmitted to the photodetector within a predetermined time,
And if the data is not transmitted, communicating with the photodetector using at least one communication technology except for the visible light communication technology among the local communication technologies.

The method according to claim 1,
When a plurality of channels are used between the data transmission device and the photodetector,
Wherein the data transmission apparatus divides the information into a plurality of information packets and sends each of the plurality of information packets to the photodetector through each of the plurality of channels.

9. The method of claim 8,
Wherein the plurality of channels are additionally provided with a predetermined local communication technique,
Wherein the short range communication technology includes Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), ultra wideband (UWB), and ZigBee.

A first step in which a data transmission apparatus transmits information using Visible Light Communication;
A second step of the photodetector detecting a plurality of lights according to the visible light communication and receiving the information; And
And a third step of the head mount display device receiving and playing the information from the photodetector.

11. The method of claim 10,
Wherein the data transmission device, the optical detector, and the head-mounted display device are installed in one booth.

11. The method of claim 10,
The photodetector includes a plurality of photodetectors,
The second step comprises:
A second step of the plurality of photodetectors detecting at least a part of a plurality of lights according to the visible light communication; And
And a signal combiner for combining the light detected by the plurality of optical detectors to generate the information.

11. The method of claim 10,
Between the first step and the second step,
Further comprising the step of collecting the plurality of lights into which the convex lenses positioned between the data transmission device and the photodetector are input at a plurality of angles with the optical detector.

11. The method of claim 10,
A predetermined local communication technique is additionally used between the data transmission device and the optical detector,
Wherein the local area communication technology includes Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), ultra wideband (UWB), and ZigBee.

15. The method of claim 14,
The data transmission apparatus includes:
Between the first step and the second step,
Determining whether the information is transmitted to the photodetector within a predetermined time; And
And performing communication with the photodetector using at least one communication technology other than the visible light communication technology among the short-range communication technologies when no data is transmitted. Way.

11. The method of claim 10,
When a plurality of channels are used between the data transmission device and the photodetector,
Between the first step and the second step,
1-6, the data transmission apparatus separating the information into a plurality of information packets; And
And transmitting the plurality of information packets to the optical detector through each of the plurality of channels.

17. The method of claim 16,
Wherein the plurality of channels are additionally provided with a predetermined local communication technique,
Wherein the local area communication technology includes Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), ultra wideband (UWB), and ZigBee.