WO2012004093A1 - Non directional infrared communication apparatus - Google Patents

Non directional infrared communication apparatus Download PDF

Info

Publication number
WO2012004093A1
WO2012004093A1 PCT/EP2011/059842 EP2011059842W WO2012004093A1 WO 2012004093 A1 WO2012004093 A1 WO 2012004093A1 EP 2011059842 W EP2011059842 W EP 2011059842W WO 2012004093 A1 WO2012004093 A1 WO 2012004093A1
Authority
WO
WIPO (PCT)
Prior art keywords
infrared
infrared light
optical guide
communication
receiver
Prior art date
Application number
PCT/EP2011/059842
Other languages
French (fr)
Inventor
Avinash Karanth
Hari Hara Kumaran
Rajeev B R Kumar
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012004093A1 publication Critical patent/WO2012004093A1/en

Links

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
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/806—Arrangements for feeding power
    • H04B10/807—Optical power feeding, i.e. transmitting power using an optical signal
    • 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
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections

Definitions

  • the invention relates to infrared communication apparatus. Background of the invention:
  • Infrared transceiver systems are typically used for short range communications.
  • the transmitter and the receiver need to be aligned with each other for the communication to take place between them.
  • the communication between the infrared transmitter and infrared receiver is most efficient when they are in line of sight with each other.
  • Aligning of the transmitter and receiver is not possible for each instance especially in portable equipments. Thus, it may result in the failure of communication or very inefficient communication between the infrared transmitter and receiver.
  • US patent number 6064502 discloses an omni-directional infrared communication system.
  • the system includes optical receiving lenses provided along with the receiver.
  • the receiving lens is typically in form of a Fresnel lens, a hemispherical, spherical or a parabolic curved lens. The manufacturing of these types of lenses requires high precision and thus are expensive.
  • the infrared transmitter and the infrared receiver need not be aligned in line of sight of each other for communication.
  • the present invention does not require high precision lenses.
  • the apparatus is very simple in construction and inexpensive.
  • Fig. 1 shows an apparatus for non directional infrared communication.
  • Fig. 1 shows a schematic of an apparatus for non directional infrared communication in accordance with this invention.
  • the apparatus includes an infrared light transmitter ( 1) and an infrared light receiver (2).
  • An optical guide (3) made of light dispersing medium is placed over the infrared light transmitter (1).
  • the optical guide (3) is in form of a sheet of infrared light dispersing material. Typically, a polycarbonate sheet is used for dispersing the infrared light signal.
  • the optical guide (3) disperses and scatters the infrared light signal from the transmitter ( 1) throughout the surface of the guide.
  • the infrared light receiver (2) when placed in proximity of said optical guide (3) and facing the optical guide (3) receives the infrared light signal scattered by the optical guide (3) .
  • the infrared light transmitter ( 1) and infrared light receiver (2) communicate without being aligned accurately with each other in presence of the optical guide (3) .
  • the present invention is implemented in wireless inductive charging devices.
  • a charging platform which includes a primary coil.
  • the secondary coil is part of the wireless tool and connected to the battery to be charged, provided in the tool.
  • Presently the communication between the primary and secondary coils takes place via current modulation in the primary coil and switching on and off an active load. This results in wastage of power in the secondary coils.
  • the communication between the primary and secondary coils is carried via infrared transmitter and receiver.
  • a sheet of infrared dispersing medium is used.
  • the communication between the infrared transmitter and receiver can take place when the receiver is in proximity of the light dispersing optical guide and facing the optical guide.

Abstract

An apparatus for non directional infrared communication is disclosed. An infrared transmitter and an infrared receiver, in accordance with the present invention do not require being in the line of sight for the communication to take place. An optical guide is used between the infrared transmitter and infrared receiver for the dispersion of the signal. The infrared receiver when placed in proximity of the optical guide is adapted to receive the transmitted infrared signals, without the need for exact alignment.

Description

TITLE
"NON DIRECTIONAL INFRARED COMMUNICATION APPARATUS
Field of the invention:
The invention relates to infrared communication apparatus. Background of the invention:
Infrared transceiver systems are typically used for short range communications. In an infrared communication apparatus, the transmitter and the receiver need to be aligned with each other for the communication to take place between them. The communication between the infrared transmitter and infrared receiver is most efficient when they are in line of sight with each other.
Aligning of the transmitter and receiver is not possible for each instance especially in portable equipments. Thus, it may result in the failure of communication or very inefficient communication between the infrared transmitter and receiver.
US patent number 6064502 discloses an omni-directional infrared communication system. The system includes optical receiving lenses provided along with the receiver. The receiving lens is typically in form of a Fresnel lens, a hemispherical, spherical or a parabolic curved lens. The manufacturing of these types of lenses requires high precision and thus are expensive.
Thus, there is a need for a non directional infrared communication apparatus which is inexpensive and easy to manufacture.
Object of the invention:
It is an object of the present invention to provide an infrared communication apparatus which is non-directional and inexpensive. Further it is an object that the non directional infrared communication apparatus can be used in portable devices for communication.
Advantages of the invention:
The infrared transmitter and the infrared receiver need not be aligned in line of sight of each other for communication. The present invention does not require high precision lenses. The apparatus is very simple in construction and inexpensive. Brief description of accompanying drawing:
Fig. 1 shows an apparatus for non directional infrared communication.
Detailed description of the invention:
Fig. 1 shows a schematic of an apparatus for non directional infrared communication in accordance with this invention. The apparatus includes an infrared light transmitter ( 1) and an infrared light receiver (2). An optical guide (3) made of light dispersing medium is placed over the infrared light transmitter (1). The optical guide (3) is in form of a sheet of infrared light dispersing material. Typically, a polycarbonate sheet is used for dispersing the infrared light signal.
The optical guide (3) disperses and scatters the infrared light signal from the transmitter ( 1) throughout the surface of the guide. The infrared light receiver (2) when placed in proximity of said optical guide (3) and facing the optical guide (3) receives the infrared light signal scattered by the optical guide (3) . Thus, the infrared light transmitter ( 1) and infrared light receiver (2) communicate without being aligned accurately with each other in presence of the optical guide (3) .
Typically, the present invention is implemented in wireless inductive charging devices. In wireless inductive charging devices, there is provided a charging platform which includes a primary coil. The secondary coil is part of the wireless tool and connected to the battery to be charged, provided in the tool. Presently the communication between the primary and secondary coils takes place via current modulation in the primary coil and switching on and off an active load. This results in wastage of power in the secondary coils.
To prevent the power wastage, it is proposed in the present invention that the communication between the primary and secondary coils is carried via infrared transmitter and receiver. To avoid failure in communication as a result of improper alignment of the infrared transmitter and receiver, a sheet of infrared dispersing medium is used. Thus the present invention enables the communication between the charging unit and the charged unit without the two being aligned in line of sight of each other. The communication between the infrared transmitter and receiver can take place when the receiver is in proximity of the light dispersing optical guide and facing the optical guide.

Claims

We Claim,
1. A method for non directional optical communication between an infrared light transmitter (1) and an infrared light receiver (2), the said method comprising the steps:
scattering a signal received from the said infrared light transmitter (1) using an optical guide (3) made of a light dispersing medium placing the said infrared light receiver (2) in proximity of the said optical guide and orienting the infrared light receiver (3) to face the optical guide (3) for receiving the said signal.
2. An apparatus for non directional optical communication between an infrared light transmitter ( 1) and an infrared light receiver (2), said apparatus provided with an optical guide (3) made of light dispersing medium, placed between the infrared light transmitter ( 1) and the infrared light receiver (2) .
3. An apparatus as claimed in claim (2) wherein, said optical guide (2) is in form of a sheet of infrared light dispersing material.
4. An apparatus as claimed in claim (2) wherein, said optical guide (2) is a polycarbonate sheet.
5. An apparatus as claimed in claim (2) wherein, said infrared light receiver (2) is adapted to be placed in proximity of said optical guide (3) and facing the optical guide (3) .
PCT/EP2011/059842 2010-07-07 2011-06-14 Non directional infrared communication apparatus WO2012004093A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1936/CHE/2010 2010-07-07
IN1936CH2010 2010-07-07

Publications (1)

Publication Number Publication Date
WO2012004093A1 true WO2012004093A1 (en) 2012-01-12

Family

ID=44367021

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/059842 WO2012004093A1 (en) 2010-07-07 2011-06-14 Non directional infrared communication apparatus

Country Status (1)

Country Link
WO (1) WO2012004093A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998011680A1 (en) * 1996-09-13 1998-03-19 Lutron Electronics, Inc. Infrared energy transmissive member and radiation receiver
US6452705B1 (en) * 1999-03-10 2002-09-17 The United States Of America As Represented By The Secretary Of The Air Force High-density optical interconnect with an increased tolerance of misalignment
WO2003009398A2 (en) * 2001-07-17 2003-01-30 Motorola, Inc. Structure and method for fabricating an optical bus
WO2008063678A1 (en) * 2006-11-21 2008-05-29 Powerbeam, Inc. Optical power beaming to electrically powered devices
US20100098430A1 (en) * 2008-10-22 2010-04-22 Qualcomm Mems Technologies, Inc. Free space optical communication with optical film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998011680A1 (en) * 1996-09-13 1998-03-19 Lutron Electronics, Inc. Infrared energy transmissive member and radiation receiver
US6452705B1 (en) * 1999-03-10 2002-09-17 The United States Of America As Represented By The Secretary Of The Air Force High-density optical interconnect with an increased tolerance of misalignment
WO2003009398A2 (en) * 2001-07-17 2003-01-30 Motorola, Inc. Structure and method for fabricating an optical bus
WO2008063678A1 (en) * 2006-11-21 2008-05-29 Powerbeam, Inc. Optical power beaming to electrically powered devices
US20100098430A1 (en) * 2008-10-22 2010-04-22 Qualcomm Mems Technologies, Inc. Free space optical communication with optical film

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