WO2013141477A1

WO2013141477A1 - Method and apparatus for transmitting and receiving optical signals using multi-wavelength optical source array and camera

Info

Publication number: WO2013141477A1
Application number: PCT/KR2013/000581
Authority: WO
Inventors: 정성윤; 유종호; 장자순
Original assignee: 영남대학교 산학협력단
Priority date: 2012-03-22
Filing date: 2013-01-25
Publication date: 2013-09-26
Also published as: KR20130116439A

Abstract

The present invention relates to an apparatus for communication using optical signals, including: a camera module for transceiving optical signals to/from the outside; a controller functionally connected to the camera module, wherein the camera module includes an image sensor for capturing an external image; and an optical transmitter for transmitting the optical signals to the outside, wherein the controller detects a first area through which the optical signal is received from the image captured by the image sensor, and performs control so as to receive an optical signal for each frame of the captured image from at least one optical source existing in the first area.

Description

Method and apparatus for transmitting and receiving optical signals using multi-wavelength light source ARRAY and camera

The present disclosure relates to a light-based communication system, and more particularly, to a method and apparatus for transmitting and receiving an optical signal using a multi-wavelength array light source and a camera.

In the existing RF communication, due to the diversification of applications, problems such as frequency exhaustion and radio wave interference are occurring. In order to solve the above problems, researches on communication based on media other than RF have been conducted, and among them, research on wireless optical communication using light is in progress. For example, visible light communication, which is created through the convergence of LED light and IT technology, performs wireless optical communication using the visible light of the LED. Such optical-based wireless communication has no frequency restriction, is free from radio interference, and physical security is high because the light signal cannot be analyzed unless a direct light is received. Other light-based wireless communication applications include a tag system using visible light and an infrared remote controller.

In addition, optical-based wireless communication has a higher physical security than RF communication, and may be used in places where RF communication restrictions occur due to problems such as radio wave interference and frequency interference (eg, hospitals, aviation, etc.).

In addition to optical devices such as mobile devices or digital cameras, optical-based wireless communication includes cameras for special purposes such as infrared cameras, 3D cameras, and hyperspectral cameras, road traffic collector cameras, and CCTVs for security inside buildings. It is applicable to all the fields where the camera is used.

Herein is a method for performing light-based communication by using a multi-wavelength light source array including a plurality of light sources and a terminal or device that detects or stores image information using an image element used as an image sensor such as a CCD or a CMOS And to provide a device.

The present specification provides an apparatus for performing communication using an optical signal, comprising: a camera module for transmitting and receiving an optical signal with an external device; And a controller operatively connected to the camera module, wherein the camera module comprises: an image sensor for capturing an external image; And an optical transmitter configured to transmit an optical signal to the outside, wherein the controller detects a first area in which the optical signal is transmitted from an image photographed by the image sensor, and at least one light source present in the first area. And receiving an optical signal for every frame of the captured image.

In addition, the optical signal received from the at least one light source is characterized in that it comprises at least one wavelength.

The controller may be further configured to classify the received optical signal for each wavelength and to acquire data using a signal magnitude value for each wavelength.

The display apparatus may further include a display unit, wherein the controller controls the display unit to display visual information indicating the detected first area.

The image sensor may be an image device capable of sensing or storing image information, such as a charge-coupled-device (CCD) or a complementary metal-oxide semiconductor (CMOS).

The light transmitting unit may be a multi-wavelength light source capable of emitting one or more wavelengths such as ultraviolet rays, infrared rays, and visible light.

The controller may control the optical transmitter to transmit an optical signal to the outside or a response to the optical signal received from each of the plurality of light sources.

In addition, the data demodulator for demodulating the data using the signal size value for each wavelength in the optical signal received through the image captured by the image sensor for each wavelength; And a data modulator for modulating data according to a modulation scheme.

In addition, the present specification is a light source device for performing communication using an optical signal, including a light source array (array) module for transmitting and receiving an optical signal with the outside, the light source array module, to transmit the optical signal to the outside An array of light sources; And an optical receiver configured to receive an optical signal from an external source, and convert the received optical signal into an electrical signal, wherein the light source array includes one or more light sources. It is characterized by transmitting an optical signal using one wavelength.

The apparatus may further include a controller operatively connected to the light source array and the light receiver, wherein the controller controls the light source array such that some of the light sources transmit the optical signal. It is done.

The control unit may control to apply different modulation schemes to respective light sources of the light source array.

The light receiving unit may be a device and a device for converting an optical signal into an electrical signal, such as a photo detector or a photo diode.

The apparatus may further include a data modulator for modulating data according to a modulation scheme and transmitting the modulated data to a light source array; And

The apparatus may further include a data demodulator for performing data demodulation on the electrical signal converted by the optical receiver.

In this specification, since optical communication is performed using image sensors attached to various electronic devices, a separate device configuration is not required, thereby reducing the complexity of hardware.

In addition, since the present specification can transmit data in parallel form by performing optical communication using a multi-wavelength light source array, it is possible to obtain a higher data rate than wireless optical communication using a conventional single light source.

In addition, the configuration of the communication circuit (RF Tag, etc.) used in the existing RF communication has a disadvantage that must be converted according to the change of information, while the method proposed in this specification is easy to receive image sensor even changes in transmission data By using as a light receiving element, there is an effect that can reduce the cost that can be caused by changing the circuit configuration.

In addition, the present specification has the effect of maintaining a higher physical security than conventional RF communication by performing data transmission and reception using the optical signal.

1A and 1B illustrate an optical signal transmission and reception method between a terminal and a light source device according to an exemplary embodiment of the present specification.

2A illustrates an internal block diagram of a terminal according to an embodiment of the present specification.

2B illustrates an internal block diagram of a light source device according to an exemplary embodiment of the present specification.

3 illustrates an example of a wavelength of each light source used in a multi-wavelength light source array module according to an exemplary embodiment of the present specification.

4 is a flowchart illustrating a method for transmitting and receiving an optical signal between a light source device and a terminal according to an exemplary embodiment of the present specification.

5 is a flowchart illustrating a method for transmitting and receiving an optical signal between a terminal and a light source device according to another exemplary embodiment of the present specification.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention and should not be construed as limiting the spirit of the present invention by the accompanying drawings. The spirit of the invention should be construed to extend to all changes, equivalents, and substitutes in addition to the accompanying drawings.

1A is a diagram illustrating an optical signal transmission and reception method between a terminal and a light source device according to an exemplary embodiment of the present specification.

That is, FIG. 1A is a schematic diagram of receiving an optical signal from the multi-wavelength light source array 211 provided in the light source device 200 by the image sensor 111 provided in the terminal 100.

Referring to FIG. 1A, an optical signal transmitted from the multi-wavelength light source array 211 of the light source device is captured as an image by the image sensor 111 of the terminal 100. The terminal 100 has images of several frames captured by the image sensor, and extracts data for each frame.

Here, each of the light sources 211-1 in the multi-wavelength light source array 211 may modulate data by applying various modulation methods for one or more different wavelengths.

Here, the light source device 200 further includes a data modulator 230 for modulating data. The data modulator 230 may be represented as a modulator. For example, the data modulator 230 includes an on off keying (OOK), a pulse width modulation (PWM), a pulse position mudulation (PPM), a pulse amplitude modulation (PAM), an amplitude shift keying (ASK), and an M-PSK. Modulation applied to or applied based on any one of modulation schemes such as M-ary Phase Shift Keying (M-QAM), M-ary Quadrature Amplitude Modulation (M-QAM), and Color Shift Keying (CSK). Data modulation is performed by the method. Thereafter, each of the light sources 211-1 transmits data modulated by another modulation method or the same modulation method to the terminal 100. The modulated data is subjected to data demodulation through the data demodulator 130 of the terminal 100. That is, the terminal 100 further includes a data demodulation unit 130 for data demodulation. The data demodulator 130 may be represented as a demodulator.

In addition, the image sensor uses an image device capable of sensing or storing image information. For example, the image sensor may be, for example, a charge-coupled-device (CCD) or a complementary metal-oxide semiconductor (CMOS), but is not limited thereto.

1B is a view illustrating a method of transmitting and receiving an optical signal between a terminal 100 and a light source device 200 according to another exemplary embodiment of the present specification.

That is, FIG. 1B illustrates an optical transmitter (or a multi-wavelength single light source) 112 provided in the terminal 100 as a light receiver (or a light receiving element 212) provided in the light source module (or the multi-wavelength light source array module 210). A schematic diagram of transmitting an optical signal. That is, the light source module 210 includes a multi-wavelength light source array 211 and a light receiver 212.

The multi-wavelength single light source 112 used as a flash of the terminal 100 transmits a ray signal indicating that communication is ready or a ray signal regarding desired information.

Here, the multi-wavelength single light source 112 may modulate data by applying various modulation methods for one or more wavelengths.

Here, the terminal 100 further includes a data modulator 140 for modulating data. The data modulator 140 may be expressed as a modulator. For example, the data modulator 140 may include OOK (On Off Keying), PWM (Pulse Width Modulation), PPM (Pulse Position Mudulation), PAM (Pulse Amplitude Modulation), ASK (Amplitude Shift Keying), M-PSK Modulation applied to or applied based on any one of modulation schemes such as M-ary Phase Shift Keying (M-QAM), M-ary Quadrature Amplitude Modulation (M-QAM), and Color Shift Keying (CSK). Data modulation is performed by the method. Thereafter, the multi-wavelength single light source 112 transmits data modulated by another modulation method or the same modulation method to the light source device 200.

The light receiving element 212 receives a signal transmitted from the terminal 100 and demodulates data. That is, the light source device 200 further includes a data demodulator 240 for data demodulation. The data demodulator 240 may be represented as a demodulator.

Referring to FIG. 2A, the terminal 100 includes a camera module (or a camera unit 110), a controller 120, a data demodulator 130, and a data modulator 140.

In addition, the camera unit 110 is configured to include an image sensor 111 and the light transmitting unit (multi-wavelength single light source, 112).

The terminal 100 may be fixed or mobile and may be called by other terms such as a user equipment (UE), a user terminal (UT), a subscriber station (SS), a wireless device, and an advanced mobile station (AMS). Can be. In addition, the terminal 100 includes the concept of a terminal (MTC terminal or M2M terminal) corresponding to MTC or M2M communication.

On the other hand, as the terminal 100 referred to in the present specification, a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a Global System for Mobile (GSM) phone, a WCDMA (Wideband) CDMA phones, Mobile Broadband System (MBS) phones, Hand-Held PCs, Notebook PCs, Smart Phones, Tablet PCs, PMPs or Multi-Mode Bands (MM-MB) ) Includes a terminal.

Here, a smart phone is a terminal that combines the advantages of a terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal portable terminal, in the terminal.

In addition, the terminal 100 referred to in the present specification includes all devices to which an image sensor such as a CCTV, a digital camera, a camcorder, and the like are attached.

The camera module 110 receives an optical signal from the multi-wavelength light source array 211 with an image sensor 111 such as a CCD or a CMOS. The multi-wavelength single light source 112 also transmits a light signal indicating that communication is ready or a light signal relating to desired information. The multi-wavelength single light source 112 may be configured as a light source capable of emitting a plurality of wavelengths used as an auxiliary type of a camera, such as an LED flash.

The controller 120 is functionally connected to the camera module 110, the data demodulator 130, and the data modulator 140, thereby implementing a proposed function, process, and / or method.

The controller 120 detects a first region in which an optical signal is transmitted from an image captured by the image sensor 111, and captures the image from at least one individual light source 211-1 existing in the first region. Control to receive an optical signal every frame of the image. Here, the first region refers to a region in which the entire region of the multi-wavelength light source array 211 exists and may refer to only a portion of the multi-wavelength light source array 211.

In addition, the controller 120 classifies the optical signals received from the multi-wavelength light source array 211 for each wavelength, and controls to acquire data using signal size values for each wavelength.

In addition, the controller 120 controls to display visual information displaying the detected first area. Here, the controller 120 may control to inform the detected first region by auditory and tactile information in addition to the visual information.

The data demodulator 130 is a signal magnitude value for each wavelength for each wavelength in an optical signal of one or more individual light sources 211-1 received from the multi-wavelength light source array 211 obtained by the image sensor 111. Demodulate data from

The data modulator 140 modulates data indicating that communication is ready or desired information data and transmits the modulated data to the optical transmitter 112.

In addition, the terminal 100 may include a memory, a display unit, a user interface unit, and the like.

The display unit displays various information of the terminal 100 and may use well-known elements such as a liquid crystal display (LCD) and organic light emitting diodes (OLED). The user interface may be a combination of a well-known user interface such as a keypad or a touch screen.

2B illustrates an internal block diagram of the light source device 200 according to an embodiment of the present specification.

The light source device 200 includes a multi-wavelength light source array module 210, a controller 220, a data modulator 230, and a data demodulator 240.

In addition, the multi-wavelength light source array module 210 includes a multi-wavelength light source array 211 and a light receiving unit (or light receiving element 212).

Here, the light source device 200 generally refers to a fixed station communicating with the terminal 100, but may have mobility, and includes a base station, a NodeB, a base transceiver system (BTS), and an access point. It may be called other terms such as (Access Point), Kiosk, Terminal.

The multi-wavelength light source array 211 includes at least one light source 211-1 emitting a plurality of wavelengths in the form of a plurality of arrays. Each of the light sources of the multi-wavelength light source array transmits data on the optical signal to the terminal 100. Here, each of the light sources 211-1 may transmit in multiple wavelengths such as ultraviolet rays, infrared rays, and visible rays. In addition, each of the light sources 211-1 may modulate data by applying various modulation methods for each wavelength. Herein, the light source device 200 includes a data modulator 230 as described above. For example, the data modulator 230 includes an on off keying (OOK), a pulse width modulation (PWM), a pulse position mudulation (PPM), a pulse amplitude modulation (PAM), an amplitude shift keying (ASK), and an M-PSK. Modulation applied to or applied based on any one of modulation schemes such as M-ary Phase Shift Keying (M-QAM), M-ary Quadrature Amplitude Modulation (M-QAM), and Color Shift Keying (CSK). The data is transmitted through data modulation. The light receiving unit (or light receiving element) 212 receives a light ray signal indicating that communication is ready or a light ray signal regarding desired information from a single light source 112 of the terminal 100, and restores the received light ray signal to data. Data demodulation is performed through the grandmother 130. That is, the light source device 200 further includes a data demodulator 240 for demodulating the modulated data. The light receiver 212 may be a device and an apparatus for converting an optical signal such as a photo detector or a photo diode into an electrical signal.

The controller 220 is functionally connected to the multi-wavelength light source array module 210, the data modulator 230, and the data demodulator 240, thereby implementing a proposed function, process, and / or method.

In addition, the controller 220 controls the multi-wavelength light source array 211 such that some light sources of the plurality of light sources 211-1 of the multi-wavelength light source array 211 transmit an optical signal.

In addition, the controller 220 controls to apply a modulation method for each wavelength of each of the light sources 211-1 of the multi-wavelength light source array 211.

The data modulator 230 modulates desired information data and transmits it to the multi-wavelength light source array 211.

The data demodulator 240 demodulates data converted from an optical signal to an electrical signal through the optical receiver 212.

In addition, the light source device 200 may further include a memory.

3 illustrates an example of a wavelength of each of the light sources 211-1 used in the multi-wavelength light source array 211 according to one embodiment of the present specification.

As shown in FIG. 3, each light source 211-1 uses a region corresponding to red, blue, and green in the visible wavelength range. Each light source may modulate data by applying various modulation methods according to data for each of three wavelengths according to the embodiment. For example, each light source includes OOK (On Off Keying), Pulse Width Modulation (PWM), Pulse Position Mudulation (PPM), Pulse Amplitude Modulation (PAM), Amplitude Shift Keying (ASK), and M-PSK (M). Data modulation is performed according to any one of modulation methods such as -ary phase shift keying (M-QAM), M-ary quadrature amplitude modulation (M-QAM), and color shift keying (CSK). It transmits the light beam by performing data modulation. Therefore, the light source device 200 can increase the data transmission rate by using a plurality of wavelengths as a plurality of light sources and applying various modulation methods.

That is, each light source 211-1 may transmit an optical signal by loading data for each of a plurality of wavelengths.

For example, each light source 211-1 may transmit data using each of R, G, and B, and may transmit data using a plurality of wavelengths such as infrared rays and ultraviolet rays in addition to R, G, and B.

In the multi-wavelength light source array module 210, there are 64 light sources in total (8 * 8), and each light source transmits 30 bits / s of data at R, G, and B wavelengths. Can send information of / s.

4 is a flowchart illustrating a method for transmitting and receiving an optical signal between a light source device 200 and a terminal 100 according to an exemplary embodiment of the present specification.

Referring to FIG. 4, the light source device 200 selects a wavelength transmitted by the individual light sources 211-1 of the multi-wavelength light source array 211, and selects each selected wavelength, each light source 211-1, or multiple wavelengths. In operation S410, a modulation method of light ray data for the entire light source array 211 is selected (or determined). In this case, the wavelength has one wavelength or a wavelength of a predetermined section.

Thereafter, the data modulator 230 of the light source device 200 performs data modulation according to the selected modulation method (S420). Here, the light source device 200 may preferably perform data modulation for each light source 211-1.

The data modulation includes OOK (On Off Keying), Pulse Width Modulation (PWM), Pulse Position Mudulation (PPM), Pulse Amplitude Modulation (PAM), Amplitude Shift Keying (ASK), and M-ary Phase Shift Keying (M-PSK). Data modulation according to any one of modulation methods such as M-ary quadrature amplitude modulation (M-QAM) and color shift keying (CSK), or perform data modulation based on an applied modulation method. .

Thereafter, the light source device 200 transmits an optical signal including the selected wavelength and modulated data to the terminal 100 (S430).

Subsequently, the terminal 100 captures an image composed of N frames by the image sensor 111 of the terminal 100 for a predetermined time with respect to the light signal transmitted from the light source device 200 (D [j], D [j-1], ..., D [j- (N-1)]) (S440).

Thereafter, the terminal 100 classifies the captured image for each frame, and analyzes the optical signal received in each frame. In this case, the terminal 100 detects an area in which an optical signal is transmitted in each frame, that is, a region of the multi-wavelength light source array 211 of the light source device 200 through image processing, before each frame analysis. In addition, classification of each light source 211-1 of the multi-wavelength light source array 211 by region and wavelength is also performed (S450). Thereafter, the terminal 100 detects the size value of the light source in every frame for each wavelength according to the modulated method for each of the classified light sources. That is, the terminal 100 performs data demodulation according to the data modulation method in the light source device 200 based on the size value of each light source detected by each light source (S460).

Here, the demodulated data is displayed on the display unit of the terminal 100 or represented by various operations of the terminal 100.

5 is a flowchart illustrating a method for transmitting and receiving an optical signal between the terminal 100 and the light source device 200 according to another exemplary embodiment of the present specification. Referring to FIG. 5, the terminal 100 generates data for initial optical-based communication (S510). Thereafter, the terminal 100 determines a wavelength and a data modulation scheme for transmitting the generated data. (S520). Thereafter, the terminal 100 modulates the generated data into an optical based signal using wavelength selection and various modulation schemes (S530).

Thereafter, the terminal 100 transmits the modulated signal as an optical (line) signal through an optical transmitter (or a multi-wavelength single light source) 112 (S540).

The light source device 200 receives an optical signal transmitted from the terminal 100 through an optical receiver 212.

Thereafter, the light source device 200 performs data demodulation after converting the received light signal into a wavelength classification and an electric signal (S550, S560, and S570).

Here, the process of transmitting the optical signal to the light source device 200 by the terminal 100 is a unidirectional direction between the optical transmitter 112 of the terminal 100 and the light receiver 212 of the light source device 200. The camera module 110 of the terminal 100 and the multi-wavelength light source array module 210 of the light source device 200 may be performed in both directions.

Embodiments and modifications described above may be combined. Accordingly, the embodiments may not be implemented alone, but may be implemented in combination as necessary. Such a combination can be easily implemented by those skilled in the art after reading the present specification, and the combination will not be described in detail below. However, even if not described, it is not to be excluded from the present invention, it should be construed as being included in the scope of the present invention.

Embodiments and modifications described above may be implemented through various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of a hardware implementation, the method according to embodiments of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs). Field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

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

For example, the method according to the present invention may be stored in a storage medium (eg, internal memory, flash memory, hard disk, etc.) and may be executed by a processor (eg a microprocessor). It can be implemented as codes or instructions within a program.

In addition, it is to be noted that the technical terms used herein are merely used to describe particular embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present specification should be interpreted as meanings generally understood by those skilled in the art unless they are specifically defined in this specification, and are overly inclusive. It should not be interpreted in the sense of or in the sense of being excessively reduced. In addition, when the technical terms used herein are incorrect technical terms that do not accurately represent the spirit of the present invention, it should be replaced with technical terms that can be understood correctly by those skilled in the art. In addition, the general terms used in the present invention should be interpreted as defined in the dictionary or according to the context before and after, and should not be interpreted in an excessively reduced sense.

Also, the singular forms used herein include the plural forms unless the context clearly indicates otherwise. In the present application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some steps It should be construed that it may not be included or may further include additional components or steps.

In addition, terms including ordinal numbers, such as first and second, as used herein may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it may be directly connected or connected to that other component, but there may be other components in between. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.

Claims

An apparatus for performing communication using an optical signal,

A camera module for transmitting and receiving an optical signal to and from the outside; And

Including a control unit that is functionally connected with the camera module,

The camera module,

An image sensor for capturing an external image; And

It includes an optical transmitter for transmitting an optical signal to the outside,

The control unit,

And detecting a first area through which the optical signal is transmitted from the image photographed by the image sensor, and receiving the optical signal every frame of the captured image from at least one light source existing in the first region. Device.
The method of claim 1,

The optical signal received from the at least one light source comprises at least one wavelength.
The method of claim 2, wherein the control unit,

And classify the received optical signal by wavelength, and control to obtain data by using a signal magnitude value for each wavelength.
The method of claim 1,

Further comprising a display unit, The control unit,

And control to display visual information indicating the detected first area on the display unit.
The method of claim 1, wherein the image sensor,

An apparatus characterized by using an image element for sensing or storing image information.
The method of claim 1, wherein the optical transmission unit,

Apparatus characterized in that it is a light source that emits multiple wavelengths or a single wavelength.
The method of claim 1, wherein the control unit,

And control the optical transmitter to transmit an optical signal to the outside or in response to an optical signal received from each of the plurality of light sources.
The method of claim 1,

A data demodulator for demodulating data using a signal magnitude value for each wavelength in the optical signal received through the image photographed by the image sensor; And

And a data modulator for modulating data according to a modulation scheme.
A light source apparatus for performing communication using an optical signal,

Including a light source array (array) module for transmitting and receiving optical signals with the outside,

The light source array module,

An array of light sources for transmitting optical signals to the outside; And

Receiving an optical signal from the outside, including an optical receiver for converting the received optical signal into an electrical signal,

The light source array,

A light source device comprising at least one light source, wherein each individual light source transmits an optical signal using at least one wavelength.
The method of claim 9,

The control unit may further include a control unit that is functionally connected to the light source array and the light receiving unit.

And the light source array of the plurality of light sources to control the light source array to transmit an optical signal.
The method of claim 10, wherein the control unit,

And controlling a different modulation scheme for each of the light sources of the light source array.
The method of claim 9, wherein the light receiving unit,

Light source device, characterized in that the photo-detector (Photo-Detector) or photo-diode (Photo-Diode).
The method of claim 9,

A data modulator for modulating data according to a modulation scheme and transmitting the modulated data to a light source array; And

And a data demodulation unit for performing data demodulation on the electrical signal converted by the light receiving unit.