Classifications

• • 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

Definitions

• the invention relates to a device for information transmission which is based on visible light as a transmission medium.
• Morse code or comparable character encoding has been around since 1840. Letters are composed of characteristic sequences of three elementary characters short signal, long signal and pause. Especially in shipping, visible light was used for the transmission of Morse code, which was turned on or off appropriately. The recipient is a human who sees the light and translates the code into letters.
• VLC Visible Light Communication
• JP 1122220 A (1989) deals with information distribution by means of lighting fixtures.
• individual spectral regions of light which also serves as illumination, the intensity of the emitted radiation varies in order to encode characters. The intensity fluctuations occur so rapidly that they are not visible to the human eye.
• the transmission capacity is sufficiently large to be able to transmit audio information, for example a spoken text, in real time.
• a receiver comprising an optoelectronic sensor, an electronic digital signal processing unit and audio electronics
• VLC technology over radio transmission in the RF frequency ranges are the clear directional dependence of the radio ⁇ transmission and that it is very unproblematic with respect to EMC compatibility and Zulas ⁇ tion of carrier frequencies.
• infrared transmission which is very similar to the choice of the spectral range of electromagnetic radiation used, the VLC technology.
• infrared radiation is very low intensities are permissible, as this radiation in the event that a human eye is illuminated, there does not trigger a protective reflex.
• the user sees when using visible light, where he one with Light pointer is aiming. This makes it useful to send a directional beam. This provides protection against eavesdropping, because the transmitted information is only perceptible to receivers to which the light beam is directed.
• JP 2007135144 A proposes an attachable to a mobile phone accessory device that can receive a VLC signal and convert it into an RF signal or a cable-transferable elec ⁇ cal signal in order to transmit it to the mobile phone ⁇ gene.
• the mobile phone thus the receiving station for reproducing information which is additionally transmitted by means of VLC, for example BL LEVEL ⁇ tung bodies or of illuminated panels.
• VLC has not prevailed on mobile phones in terms of “visible light communication”. Probably there is not one on the market as standard available mobile tele ⁇ fon in which this technology is actually applied. (Although an app is offered for smartphones, which is called “VLC media player”, this has nothing to do with “visible light communication”, but with a coding method for media files, namely the so-called “variable length coding” .)
• the AT508439 Bl describes, inter alia, a laser pointer, which holds a VLC function.
• the laser pointer serves as a pointing device for an optically position-sensitive input surface for a data processing system.
• the intensity of the light emitted from the laser pointer light beam varies according to a Codie ⁇ tion, it is achieved that are identifiable by the data processing system ⁇ individual laser pointer from a group of a plurality of laser pointers used out and that not only a point on the input surface can be defined by the laser pointer, but also characters (letters, yes / no, etc.) can be entered.
• the light beam emitted by the laser pointer may have a cross-shaped cross-sectional area, with the individual lines extending beyond the input area.
• the inventor has set itself the task of equipping a mobile phone such that it is better and above all safer than previously available mobile phones possible, compared to other communication-enabled electronic devices - such as a personal computer or an electronic Door lock - to reveal by notification of a key information.
• VLC means of a switchable light source
• the required light source typically this is a La ⁇ serpointer, housed in an accessory, which lös ⁇ bar mechanically connectable to the mobile phone is and which can communicate via a data interface with the mobile phone and is controlled by the mobile phone.
• VLC is proposed because this transmission can be extremely directionally selective. Since there is no radiation in unwanted directions, the transmission is very well tap-proof and there are no problems with the electromagnetic compatibility.
• the VLC-compatible light source as an additional device to form a mobile phone and not to integrate it into the mobile phone is advantageous, among other things, because thus the accessory even without a mobile phone at least as a simple light pointer, typically laser pointer is usable and because thus with egg ⁇ nem relatively simple Device also all already in use mobile phones, which can subsequently load programs (apps) are equipped with the function.
• auxiliary device which includes the VLC-capable light source
• Bluetooth or a USB line connection can be used.
• Fig. 1 shows a side view of an exemplary erfindungsge ⁇ Permitted device.
• FIG. 2 shows a first block diagram of a group of ten Gerä ⁇ within which the inventive device is typi cally ⁇ applicable.
• FIG. 3 shows a second block diagram of a group of ten Gerä ⁇ within which the inventive device is typi cally ⁇ applicable.
• a device according to the invention consists of two detachably connectable devices, namely a mobile phone 1 and attachment 2.
• FIG. 1 The example of FIG. 1, the two devices 1, 2 via a USB connector 2.4 and two additional hooks are releasably connected to each other.
• the housing 2.1, the laser pointer 2.2 and the photodetector 2.3 are indicated in addition to the USB connector 2.4.
• the additional device 2 can of course still with a rechargeable battery, a controller and buttons for on and off and possibly be equipped for various functions that may be independent of the mobile phone 2.
• Those control through which determines how data are to be translated from the present in the mobile phone ⁇ 2 format into light pulses of the laser pointer 2.2, theoretically, in the mobile phone 1 can be accommodated.
• this control is housed in the auxiliary device 2, since then for the mobile phone 1 is a simpler program and between mobile phone 1 and auxiliary device 2 data only in the for the data transmission Mobile phones usual formats must be transmitted.
• the additional device Even if future mobile phones should already be prepared by the manufacturer for communication with additional devices according to the invention, it makes sense if possible to carry out the additional device so that it represents an applicable VLC communication device independently of the mobile phone.
• ⁇ auxiliary device provided with a control which characters can encode in VLC signals.
• the attachment is to be provided with a data memory which stores information such as in particular to be used as key codes, - obtained with a Mo ⁇ biltelefon - that can store. It therefore does not need the phone while having to identify themselves using the ⁇ to set the device or to use the accessory as VLC enabled laser pointer.
• the inventive device can - if ATMs and cash registers are equipped with ATM function accordingly - make, for example, a debit card superfluous.
• the ATM or Debit card must be equipped with a photo to ⁇ sensor that this is able to receive the light emitted from the laser pointer 2.2 of accessory light pulses and to dissolve the changes over time of it. Furthermore, the ATM and the cash card must contain an electronic translation unit which translates the resulting ⁇ nit of the photo sensor in the otherwise used in the ATM or the Debit card data format. Thirdly, the cash dispenser or cash dispenser must be equipped with a control program which allows interaction via the interface to the mobile telephone and also provides the necessary menus.
• the withdrawal of money by a user from an ATM can then take place in the following steps:
• the ATM is on standby.
• the user puts on his mobile phone 1, the additional device 2 and selects on the mobile phone app "withdraw money with ⁇ means Bankomat" from.
• the app may or may not prompt the user for a username and password.
• the app signals on the mobile phone that the interaction with the ATM can start.
• the user directs the attachment on a target area at the ATM, on which the above-mentioned photo sensor is located and presses on the provided on the display surface of the mobile phone ⁇ button "sign on ATMs".
• the VLC-capable light source in the additional device sends a sequence of light pulses to the photosensor of the ATM, which encodes which user is currently logging on.
• the ATM receives the light pulses, can read the information, checks over the data network to which it and a central bank server are connected, whether the logging user actually exists, and whether the user is entitled to receive services from the ATM. If so, a menu is displayed asking the user (and others) to either withdraw money or to check the account balance.
• the cash machine itself can also send data via VLC to the mobile phone 1 (via the additional device 2, which then needs a photodetector 2.3 as an intermediate station), the ATM itself does not need to take any further display space or input surfaces in operation or exhibit ; the relevant functions can then be provided by the touch screen of the mobile phone.
• Server 3 and mobile phone 1 and server 3 and service ⁇ phone 4 can communicate with each other via the data transmission network 6, which can typically be the Internet, with each other to take a tour, so exchange data.
• the device 1, 2 according to the invention and the service device can communicate via a VLC connection 5.
• the data server 3 belongs to a company which offers goods or services and for this purpose has set up on the data server 3 a homepage on which it presents itself and also offers services or goods for selection and sale.
• the user of the mobile phone 1 can be accessed via the communication network 6, the company's home page, select a product or service, order via its mobile tele ⁇ fons 1 and receives a confirmation of his order a code his mobile phone.
• the data server 3 is deposited, which order belongs to this code.
• the service device 4 then occurs via the data server 3 in contact and can be checked by this whether the code relates to a valid order and which order that may be.
• the service ⁇ power device 4 performs an action by which the performance according to the order for the user is available, so the goods are delivered according to order or the service is performed according to order or feasible.
• the data server 3 may belong to a hotel and the service device 4 may be a vending machine which is arranged at the entrance area of the hotel and after checking the authorization issues a front door and room key to the authorized user, so that he can order an ordered hotel room. You can also refer if the reception is no longer occupied.
• the service ⁇ device 4 could also be a door lock itself, which releases a house or room door after checking the authorization for opening, so that the attachment 2 itself represents the physical part of Schlüs ⁇ sels.
• the invention Before ⁇ direction, consisting of a mobile telephone 1 and an auxiliary device 2, and a data server 3 and a data transmission network 6 symbolizes. Furthermore, in Fig. 3, a position resolution photo-sensitive input surface 7, and a data processing system 8 are symbolized, to which 7 inputs ge through the input surface can be ⁇ makes.
• Server 3 and mobile phone 1 and server 3 and data processing system 8 can interact with each other via the data transmission network 6, which may typically be the Internet, so exchange data.
• the device 1, 2 according to the invention can send information to the input surface 7 by means of single-sided VLC transmission 15 and thereby act indirectly on the data processing system 8.
• the input-output area is photosensitive and position-resolving. That is, they not only measures whether an out from the equipment 2 ⁇ sandter light beam is incident, but also where it impinges on it. Since the input surface 7 also detects when the light ⁇ beam is turned off and when it is turned on, it is also effective as a receiver of the VLC transmission 15.
• the arrangement of Figure 3 may typically be used to play in public space.
• a company can disseminate information on any media (Internet, TV, radio, print media) and provide publicly accessible places an input surface 7 together with the associated data processing system 8 and running on the program, the input surface 7, ideally, output surface (screen, projec ⁇ onsleinwand) for the data processing system is.
• the data server 3 can also be used to download a program for the suitable coding of the mobile telephone 1 for the coding of the VCL transmission.
• the input surface 7 does not necessarily have to be self-photosensitive. It is also possible to perform only the edges 7.1 position-resolving photoselektiv and lead the pointing beam from the attachment not with "punctiform" cross-sectional area ⁇ lead, but as several lines.
• Fig. 3 is indicated by the dotted lines a crosshair 15.1 as a possible cross-sectional shape of the beam. From the intersections of the Crosshair 15.1 with the sensory edges 7.1 the center of the crosshair 15.1 can be calculated. With aghma ⁇ Shen large version of the crosshairs 15.1 so that not only points on the input surface 7 can be marked, but also points just next to the input surface.
• gaming can be financed by advertising messages that are packaged in-game, or by entry fees, or by using the game in an inn as an extra incentive for guests to stay longer and consume more.
• the accessories 2 must be able to send not only a light pointer ⁇ , but also have a photodetector 2.3 for the reception of light of such a pointer.
• the passportge ⁇ advises 2 or the associated cellular phone 1 must also have a decoding circuit for converting the output by the photodetector 2.3 pulses in the otherwise usable data format.
• this radio link can be when the light pointer is a high light output is used, and when the cross-sectional area of the light pointer at the outlet of the attachment as large as possible but well collimated (ie with the smallest possible widening angle) is set ,
• VLC-enabled light source with an optical Ge ⁇ advises as a concave mirror or a lens, which has at least several centimeters in diameter, is particularly at ⁇ explanatory that it is very useful to the VLC able to accommodate light ⁇ source in a detachable from the mobile phone accessory.
• the VLC-capable light source 2.2 in the auxiliary device 2 is currently probably best to realize by a laser diode, because this matching intensity, high switching speed, good controllability ⁇ speed and low price go along. But It should be executed ⁇ recognized that the invention can also be implemented using other light sources such as other laser principles or normal LEDs.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Optical Communication System (AREA)
• Mobile Radio Communication Systems (AREA)
• Telephone Function (AREA)

Applications Claiming Priority (2)

Publications (2)

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Cited By (9)

Citations (8)

Family Cites Families (6)

• 2012
  • 2012-07-23 AT AT8192012A patent/AT513188A1/de not_active Application Discontinuation
• 2013
  • 2013-07-22 WO PCT/AT2013/050137 patent/WO2014015353A2/fr not_active Ceased

Patent Citations (8)

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