WO2019066433A1 - Récepteur de communication par lumière visible - Google Patents

Récepteur de communication par lumière visible Download PDF

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Publication number
WO2019066433A1
WO2019066433A1 PCT/KR2018/011315 KR2018011315W WO2019066433A1 WO 2019066433 A1 WO2019066433 A1 WO 2019066433A1 KR 2018011315 W KR2018011315 W KR 2018011315W WO 2019066433 A1 WO2019066433 A1 WO 2019066433A1
Authority
WO
WIPO (PCT)
Prior art keywords
visible light
hollow
signal
interference
main body
Prior art date
Application number
PCT/KR2018/011315
Other languages
English (en)
Korean (ko)
Inventor
김상옥
김병오
윤상호
노승완
Original Assignee
㈜유양디앤유
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ㈜유양디앤유 filed Critical ㈜유양디앤유
Publication of WO2019066433A1 publication Critical patent/WO2019066433A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0076—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a detector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/116—Visible light communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver

Definitions

  • the present disclosure relates to a visible light communication receiver.
  • a light emitting element is a member that converts electricity into light and is used in many fields requiring light. Particularly, a light emitting device of a visible light wavelength range is used in a communication field, and is useful for visible light communication (VLC, Visible Light Communication) which can simultaneously perform a communication function while maintaining the illumination function.
  • VLC Visible Light Communication
  • Visible light communication is a technology that can be utilized in various fields, and can be particularly useful for providing information to the external terminal from information of the management server in a large shopping mall or a building.
  • the visible light communication receiver may not properly receive the target visible light signal due to the interference visible light emitted from the ambient light source, or may receive the target visible light signal weakly, and the information can not be normally decoded.
  • a visible light communication receiver including an interference blocking unit to block unwanted interference visible light emitted from an ambient light source, thereby increasing a reception ratio of a target visible light signal.
  • An interference block A light receiving lens disposed at a lower portion of the hollow pipe passage and concentrating a visible light signal; A light receiving element which receives a visible light signal from a light receiving lens in a lower part of the light receiving lens and converts the visible light signal into an electric signal; And a signal processing unit receiving the electric signal from the light receiving element and generating output data corresponding to the electric signal.
  • the visible light communication receiver has the effect of increasing the utilization of visible light communication by blocking the interference visible light by using the interference blocking unit and increasing the reception ratio of the target visible light signal.
  • FIG. 1 is a block diagram illustrating a visible light communication system using a visible light communication receiver according to an embodiment of the present disclosure.
  • FIG. 2 is a perspective view of a visible light communication receiver in accordance with an embodiment of the present disclosure
  • FIG. 3 is an exploded view illustrating a configuration of a visible light receiving portion of the visible light communication receiver shown in FIG.
  • FIG. 4 is a front view of an interference shield according to an embodiment of the present disclosure.
  • FIG. 5 is a block diagram illustrating a visible light communication receiver according to an embodiment of the present disclosure performing visible light communication with an external terminal.
  • FIG. 6 is a front view of a visible light communication receiver including a first hollow and a control according to one embodiment of the present disclosure
  • FIG. 7 is a front view of a visible light communication receiver including a second hollow in accordance with one embodiment of the present disclosure
  • FIG. 8 is an exemplary view illustrating a visible light communication receiver including a first connection unit and a second connection unit according to an embodiment of the present invention connected to an external terminal.
  • the first, second, i), ii), a), b) and the like can be used. These codes are for distinguishing the constituent elements from other constituent elements, and the nature of the constituent elements, the order and the order of the constituent elements are not limited by those codes. It is to be understood that when a component is referred to as being “comprising” or “comprising” an element in the specification, it does not exclude other elements, unless explicitly contradicted by the description, .
  • FIG. 1 is a block diagram illustrating a visible light communication system using a visible light communication receiver 30 in accordance with an embodiment of the present disclosure.
  • a visible light communication system may include a visible light communication transmitter 10, a management server 20, a visible light communication receiver 30, and an external terminal 40.
  • the visible light communication transmitter 10 can transmit the information data received from the management server 20 to the visible light communication receiver 30 using visible light.
  • the visible light communication transmitter 10 receives the information data from the management server 20 and adds the coordinate value of the predetermined light emitting element corresponding to the classification code included in the information data to the information data to modulate it into an electric signal,
  • the light emitting element is blinked to convert the modulated electrical signal into a visible light signal and transmit it.
  • the visible light communication transmitter 10 when the visible light communication transmitter 10 receives the information data on the cookie advertisement from the management server 20, the visible light communication transmitter 10 adds the coordinate value preset in the cookie corner to the information data, Lt; / RTI >
  • the modulated digital signal can be transmitted as a visible light signal by blinking the light emitting element corresponding to the coordinate value of the cookie corner.
  • the management server 20 stores the inputted information data through the operation of the manager and can transmit the information data to the visible light communication transmitter 10.
  • the information data may include information such as advertisement information, product information, discount information, location information, authentication information, classification code, and the like.
  • the advertisement information may be information for delivering an advertisement for a product or a store to the user, and when the user is standing in front of a product shelf, information for delivering detailed information about the product displayed on the shelf .
  • the location information corresponding to the location request information may be included in the information data.
  • the classification code included in the information data is a code for specifying a coordinate value. For example, when the classification code is " 101 ", the coordinate value corresponds to 1 in the first layer. A coordinate value corresponding to 13 may be displayed.
  • the classification code may be changed according to the method set by the administrator and included in the information data.
  • the management server 20 can receive the request signal and the login information from the external terminal 40. [ For example, when the user transmits the request information including the shopping discount information and the login information using the ID and password to the management server 20 through the external terminal 40, The controller 20 can transmit the information such as the current shopping discount information, the reserve of the logged-in user, favorite goods, etc. to the visible light communication transmitter 10 in the information data.
  • the visible light communication receiver 30 may receive the visible light signal from the visible light communication transmitter 10 using the visible light and display the output data corresponding to the visible light signal on the external terminal 40.
  • the visible light communication receiver 30 receives the visible light signal from the visible light communication transmitter 10 and converts it into an electric signal, demodulates the converted electric signal into output data, and transmits the output signal to the external terminal 40.
  • a visible light signal from the visible light communication transmitter 10 and convert it into a digital signal, demodulate the digital signal into information data for a confectionary advertisement, and allow the user to receive a confectionary advertisement through the external terminal 40 Can be displayed.
  • the visible light communication receiver 30 is shown as being a separate device from the external terminal 40, but is not limited thereto, and may be included in the external terminal 40 as needed.
  • the external terminal 40 is a communication terminal capable of transmitting and receiving various data via a communication network according to a key operation of a user.
  • the external terminal 40 may be a tablet PC, a laptop, a personal computer (PC) A smart phone, a personal digital assistant (PDA), and a mobile communication terminal.
  • PC personal computer
  • PDA personal digital assistant
  • the external terminal 40 is a terminal for performing data communication with the management server 20 via a network, and includes a memory for performing data communication, a microprocessor for executing and controlling various programs, and the like And the like.
  • the external terminal 40 may be a broad concept that includes both a communication computing device capable of data communication with the management server 120 via a network.
  • the external terminal 40 is preferably formed with a touch screen, but is not limited thereto.
  • the external terminal 40 may be a module connected to the visible light communication receiver 30 and displaying information data. Also, the external terminal 40 can transmit the request signal inputted through the user's operation to the management server 20 via the network, if necessary.
  • the external terminal 40 may transmit the request signal to the management server 20 including the login information of the user and the location (coordinate value) of the user.
  • FIG 2 is a perspective view of a visible light communication receiver 30 in accordance with one embodiment of the present disclosure.
  • FIG. 3 is an exploded view showing a configuration of a visible light receiving portion of the visible light communication receiver 30 shown in Fig.
  • FIG. 4 is a front view of an interference blocking section 200 according to an embodiment of the present disclosure.
  • FIG. 5 is a block diagram showing that the visible light communication receiver 30 according to the embodiment of the present disclosure performs visible light communication with the external terminal 40.
  • the visible light communication receiver 30 includes a main body 100 and an interference blocking unit 200.
  • the main body 100 may be a box-shaped case in which various members constituting the visible light communication receiver 30 can be located.
  • the main body 100 may include a first hollow 102 or a second hollow 106 at one side of the main body 100 where the interference shield 200 is disposed. A detailed description of the first hollow 102 and the second hollow 106 will be described with reference to Figs. 6 and 7, respectively.
  • the interference shield 200 may block at least a portion of visible light emitted from an unwanted light source, such as the sun, other illumination, or the like. Therefore, the interference shielding unit 200 can prevent interference from undesired visible light when receiving the desired visible light, which is emitted from the visible light communication transmitter 10.
  • an undesired visible light is referred to as an interference visible light
  • a desired visible light is referred to as a visible light signal.
  • the other illumination that emits the interfering visible light may be a third visible light communication transmitter except for the visible light communication transmitter 10 that emits visible light signals, but the term visible light communication transmitter 10 used in describing the present invention Quot; refers only to the visible light communication transmitter 10 that emits a desired visible light signal.
  • the sun, the third visible light communication transmitter, and the like are referred to as an interference light source 50.
  • the interference blocking unit 200 includes an incident opening surface 210 on which a visible light signal is incident, and a hollow penetrating path 220 through which a visible light signal passes.
  • the incidence opening surface 120 has a circular shape depending on the shape of the light receiving lens 110, but it is not limited thereto and may have a polygonal shape such as a triangle, a square, or the like.
  • the amount of interference visible light incident on the incident opening 210 may vary. Therefore, there is a need for a means for quantitatively expressing the amount of interference visible light incident on the entrance surface 210 irrespective of the shape of the entrance surface 210.
  • the diameter of a circle having the same area as the area of the incident opening surface 210 is defined as the effective diameter D. Even if the area is the same, the amount of interference visible light can naturally vary if it is a circle shape or not.
  • the incidence opening surface 210 has a shape that surrounds the periphery of the light receiving lens 110 depending on the shape of the light receiving lens 110.
  • whether or not the visible light signal is interfered with is determined by the interference visible light, It can be interpreted that if the incident opening surface 210 has the same area, that is, if the effective diameter D is the same, the possibility that a similar amount of interference visible light is incident also increases. have.
  • the visible light communication receiver 30 since the visible light communication receiver 30 must be able to receive the visible light signal while avoiding interference visible light, it requires a light receiving lens 110 having a certain diameter or more.
  • the hollow passageway 220 may be a passage through which the visible light signal passing through the incident opening 210 passes.
  • the interference visible light can also pass through the hollow penetrating path 220 together with the visible light signal.
  • the amount of the interference visible light incident on the light receiving lens 110 may be varied, thereby varying the degree of interference of the visible light signal.
  • FIG. 4 (a) A large amount of interference visible light is incident on the light receiving lens 110 in Fig. 4 (a) in which the sidewall height H is the lowest and in Fig. 4 (b) in which the sidewall height H is higher, The incident light is incident on the light receiving lens 110. Finally, in FIG. 4 (c) in which the height of the side wall is the highest, the interference visible light is completely blocked from the light receiving lens 110.
  • the height H of the sidewall of the hollow passageway 220 increases, the amount of interference visible light incident on the light receiving lens 110 decreases. However, if the height H of the sidewall of the hollow passageway 220 is excessively high, the appearance of the visible light communication receiver 30 is not good.
  • visible light above a certain threshold value In order for visible light to be recognized by the visible light communication receiver 30 as a visible light signal, visible light above a certain threshold value must be incident on the light receiving lens 110. [ On the other hand, in order for interference to be generated in the visible light signal, the interference visible light above the threshold value must be incident on the light receiving lens 110.
  • the height H2 of the sidewall of the hollow passageway 220 should be only a value that allows interference visible light of less than a threshold value to be incident on the light receiving lens 110.
  • the effective diameter D of the entrance opening surface 210 and the height H of the sidewall of the hollow passageway 220 are limited in adjusting the numerical value and that the environment in which visible light communication is mainly used,
  • the height H of the sidewall of the hollow passageway 220 and the effective diameter D of the entrance opening surface 210 of the hollow passageway 220 are determined in consideration of the distance between the lamps serving as the light source 10, ) Is most effective at 0.75 or more, and preferably the sidewall height H of the hollow passageway 220 is at least 6 mm.
  • the interference visible light may be reflected by the inner wall of the hollow passageway 220, and the reflected interference visible light may enter the light receiving lens 110 to interfere with the visible light signal. Therefore, it is preferable that the inner wall of the hollow passageway 220 is black that does not cause reflection of interference visible light.
  • the visible light communication receiver 30 further includes a light receiving lens 110 and a light receiving element 120.
  • the light receiving lens 110 is disposed below the hollow passage 220 to concentrate a visible light signal.
  • the visible light signal collected by the light receiving lens 110 is transmitted to the light receiving element 120.
  • the light receiving element 120 receives the visible light signal from the light receiving lens 110 in the lower part of the light receiving lens 110, and converts the visible light signal into an electric signal.
  • the interference shield 200 is shown as a separate member from the main body 100, but the present invention is not limited thereto, and the interference shield 200 may be a member integrated with the main body 100.
  • FIG. 3 the interference shield 200 is shown as a separate member from the main body 100, but the present invention is not limited thereto, and the interference shield 200 may be a member integrated with the main body 100.
  • the visible light communication receiver 30 may include a light receiving lens 110, a light receiving element 120, a signal processing unit 130, and an information output unit 140.
  • the signal processing unit 130 receives the electric signal from the light receiving element 120 and generates output data corresponding to the electric signal.
  • the information output unit 140 may receive the output data from the signal processing unit 130 and transmit the output data to the external terminal 40.
  • FIG. 6 is a front view of a visible light communication receiver 30 including a first hollow 102 and a control unit 150 in accordance with an embodiment of the present disclosure.
  • the visible light communication receiver 30 may include a first hollow 102, an interference blocking unit 200, and a control unit 150.
  • the main body 100 may include a first hollow 102 having a threaded sleeve 104 formed on one side of the main body 100 on which the interference shield 200 is disposed.
  • the interference shield 200 may be fastened to the main body 100 through a threaded sleeve 104 in a screwed manner. Therefore, the height H of the sidewall of the hollow through-passageway 220 protruding outward from the first hollow 102 can be adjusted according to the degree of fastening.
  • the interference shield 200 when the interference shield 200 is rotated in the clockwise direction, the interference shield 200 has a larger number of parts to be coupled to the main body 100, It can move toward the inside. Accordingly, the hollow passageway 220 of the interference block 200 can have the shortest side wall height H1.
  • the interference shielding unit 200 when the interference shielding unit 200 is rotated in the counterclockwise direction, the interference shielding unit 200 has a smaller area to be coupled to the main body 100, ). ≪ / RTI > Accordingly, the hollow passageway 220 of the interference block 200 can have the longest side wall height H2. At this time, the height H of the sidewall of the hollow penetrating path 220 includes the height of the portion of the first hollow 102 to which the interference blocking portion 200 is not fastened.
  • the side wall height H of the hollow passageway 200 can be freely adjusted within the range from H1 to H2 depending on the degree to which the interference shield 200 is fastened to the main body 100.
  • the control unit 150 can adjust the degree to which the first hollow 102 and the interference blocking unit 200 are fastened according to the degree of interference of the visible light signal, Can be adjusted.
  • a method of determining the degree of interference of the visible light signal by the controller 150 may be a method of determining that interference occurs in the visible light signal when the visible light communication receiver 30 can not read data from the visible light signal for a predetermined time
  • the illuminance of the visible light signal incident on the light receiving lens 110 and the illuminance of the interference visible light are measured and it is determined that the interference occurs when the difference is smaller than the predetermined value.
  • the user of the visible light communication receiver 30 can usually take the interference shielding unit 200 up to the height H1 and take it out to the height H2 only when performing visible light communication.
  • the height H of the sidewall of the hollow passageway 220 may be automatically adjusted through the control unit 150 according to the surrounding environment.
  • the height H of the sidewall of the hollow passageway 220 becomes excessively high, thereby hindering the appearance of the visible light communication receiver 30. Further, the height H of the sidewall of the hollow passageway 220 can be freely adjusted according to the environment in which visible light communication is performed, thereby making visible light communication more efficient.
  • the visible light communication receiver 30 including the first hollow cavity 102 may be provided with a hollow hollow passageway 220 to prevent reflection of interference visible light that may occur in the inner wall of the hollow hollow passageway 220.
  • at least one of the inner side wall and the inner side wall of the first cavity 102 is made of black.
  • FIG. 7 is a front view of a visible light communication receiver 30 including a second hollow 106 in accordance with one embodiment of the present disclosure.
  • the visible light communication receiver 30 may include a second hollow 106 and an interference shield 200.
  • the main body 100 may include a second hollow 106 having a shape recessed inward of the main body 100 while being disposed on one side of the main body 100 in which the interference shield 200 is disposed.
  • At least a portion of the sidewalls of the hollow passageway 220 may be formed in the second hollow 106. That is, the height H of the sidewall of the hollow passage 220 also includes at least a portion of the height of the second hollow 106. At this time, the light receiving lens 110 may be disposed inside the recessed shape of the second hollow 106.
  • the portion of the interference shield 200 projecting from the main body 100 is reduced, It is possible to prevent the appearance of the visible light communication receiver 30 from being deteriorated.
  • FIG. 8 is an exemplary view illustrating a visible light communication receiver 30 including a first connection part 142 and a second connection part 144 connected to an external terminal 40 in accordance with an embodiment of the present disclosure.
  • the visible light communication receiver 30 may include an information output unit 140 and the information output unit 140 may include a first connection unit 142 and a second connection unit 144 .
  • the first connection unit 142 may be coupled to the other side of the main body 100 to receive output data and the second connection unit 144 may be connected to the external terminal 40 to receive output data transmitted from the first connection unit 142, To the external terminal.
  • the first connection part 142 may be configured to be rotatable with respect to the second connection part 144.
  • the first connection unit 142 is rotated by the information output unit 140.
  • the first connection unit 142 and the second connection unit 144 may include a shaft member (not shown)
  • the first connection part 142 may be connected to the first connection part 142 and the second connection part 142 may be connected to the first connection part 142.
  • the first connection part 142 may be rotated by a screw fastening method, but the present invention is not limited thereto.
  • the first connection portion 142 is rotatable with respect to the second connection portion 144 so that the light receiving lens 110 can be directed to the visible light communication transmitter 10 that emits visible light signals, It is possible to rotate the external terminal 40 toward the user's field of view so that the user can view the information displayed on the external terminal 40.
  • the interference shield 200 faces the visible light communication transmitter 10, so that the visible light communication receiver 30 receives the visible light signal, At the same time, the user can confirm the information displayed on the external terminal 40 in a comfortable posture.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un récepteur de communication par lumière visible. Selon un mode de réalisation de la présente invention, le récepteur de communication par lumière visible comprend un corps principal; une unité de blocage d'interférence qui comprend une surface d'incidence ouverte sur laquelle un signal de lumière visible est incident et un trajet de passage creux à travers lequel passe le signal de lumière visible, qui est disposé sur un côté du corps principal, et dans lequel le rapport de la hauteur de la paroi latérale du trajet traversant creux au diamètre effectif de la surface d'incidence ouverte est supérieur ou égal à 0,75; une lentille de réception de lumière qui est disposée au niveau d'une partie inférieure du trajet traversant creux et concentre le signal de lumière visible; un élément de réception de lumière qui reçoit le signal de lumière visible de la lentille de réception de lumière dans une partie inférieure de la lentille de réception de lumière et convertit le signal de lumière visible en un signal électrique; et une unité de traitement de signal qui reçoit le signal électrique provenant de l'élément de réception de lumière et génère des données de sortie correspondant au signal électrique.
PCT/KR2018/011315 2017-09-29 2018-09-21 Récepteur de communication par lumière visible WO2019066433A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170128102A KR102089301B1 (ko) 2017-09-29 2017-09-29 가시광통신 수신기
KR10-2017-0128102 2017-09-29

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WO2019066433A1 true WO2019066433A1 (fr) 2019-04-04

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990007520U (ko) * 1997-07-31 1999-02-25 유기범 포토센서의 주변광 차단구조
US6184521B1 (en) * 1998-01-06 2001-02-06 Masimo Corporation Photodiode detector with integrated noise shielding
EP1126427A2 (fr) * 2000-02-10 2001-08-22 Ncr International Inc. Dispositif de blocage de lumière ambiante pour un système de reconnaissance de produits
JP2009164427A (ja) * 2008-01-08 2009-07-23 Sony Corp 光学装置、その製造方法及び光通信装置
KR101530177B1 (ko) * 2014-03-20 2015-06-22 (주)유양디앤유 가시광통신 수신장치 및 수광렌즈 결합방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990007520U (ko) * 1997-07-31 1999-02-25 유기범 포토센서의 주변광 차단구조
US6184521B1 (en) * 1998-01-06 2001-02-06 Masimo Corporation Photodiode detector with integrated noise shielding
EP1126427A2 (fr) * 2000-02-10 2001-08-22 Ncr International Inc. Dispositif de blocage de lumière ambiante pour un système de reconnaissance de produits
JP2009164427A (ja) * 2008-01-08 2009-07-23 Sony Corp 光学装置、その製造方法及び光通信装置
KR101530177B1 (ko) * 2014-03-20 2015-06-22 (주)유양디앤유 가시광통신 수신장치 및 수광렌즈 결합방법

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KR20190038076A (ko) 2019-04-08

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