WO2003052947A2 - Plug and play dual fm hands-free car kit - Google Patents

Plug and play dual fm hands-free car kit

Info

Publication number
WO2003052947A2
WO2003052947A2 PCT/US2002/039854 US0239854W WO2003052947A2 WO 2003052947 A2 WO2003052947 A2 WO 2003052947A2 US 0239854 W US0239854 W US 0239854W WO 2003052947 A2 WO2003052947 A2 WO 2003052947A2
Authority
WO
Grant status
Application
Patent type
Prior art keywords
telephone
mobile
signal
device
fm
Prior art date
Application number
PCT/US2002/039854
Other languages
French (fr)
Other versions
WO2003052947A3 (en )
Inventor
Jae Yang
Original Assignee
Jae Yang
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/60Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers
    • H04M1/6033Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041Portable telephones adapted for handsfree use
    • H04M1/6075Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle
    • H04M1/6083Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0241Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for telephones

Abstract

A hands-free mobile telephone kit, including a device including an audio-FM converter and a FM transmitter circuit. The device is connected to a mobile telephone. The mobile telephone having its own speaker system. The device is configured to receive, convert and transmit a first signal received by the mobile telephone from a remote signal source connected over a mobile connection to the mobile telephone, to a FM receiver of an audio system for subsequent audio transmission over a speaker system connected to the audio system. The device is further configured to receive and transmit the first signal for audio transmission over the speaker system of said mobile telephone.

Description

PLUG AND PLAY DUAL FM HANDS-FREE CAR KIT

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to cellular telephone accessories, and particularly to accessories that permit hands-free use of a cellular phone in an environment such as in an automobile, and that work in synergistic relationship with pre-existing automobile audio technology.

The Prior Art

The cellular telephone is becoming an increasingly attractive option for persons who wish to communicate with business or personal acquaintances even though they are away from their home or office telephone. Cellular telephones are often efficiently used when a person is traveling between two destinations that each have conventional telephone capabilities. The most common scenario is a person traveling to work from home or vice-versa, or when traveling between two business destinations. Such traveling typically involves driving a car.

For an automobile having a manual transmission, two hands are required for manipulating the controls, i.e., one for steering and one for shifting gears. Even for an automobile with an automatic transmission, it is recommended to have two hands on the wheel at all times. Cellular telephones, like any other telephones, include a handset with a microphone and a speaker so that the user may, respectively, speak with and listen to the person at the other end of a call by holding the telephone in one hand. Of course, when a person is holding a cellular telephone in one hand, only one other hand remains free for manipulating the controls of the automobile such as the steering wheel and the stick shift. It is recognized in the present invention that it is desired that a person be able to talk on a cellular telephone while having two hands free to properly manipulate the controls of an automobile.

A disadvantage of using a cellular telephone handset is that only two persons can typically participate in a single call, without one person relaying to a third person what a person at the other end is saying or without handing the telephone back and forth between persons. If a cellular telephone were simply held or set down on a seat between two persons both wishing to communicate with the person at the other end, neither of the two persons would be able to effectively hear, nor would the person at the other end be able to hear either of the two persons without everyone shouting excessively. It is desired to be able to hold a "conference call" through a cellular telephone connection in an automobile.

Wireless subscribers carry out their day to day business from their cars, from the job site, while walking along the airport concourse, and just about anywhere their signals are accessible.

Additionally, the popularity of the speakerphone, for both mobile and fixed telephones has grown steadily. The speakerphone feature enables users to conduct other tasks while carrying on a conversation without having to hold the instrument to their ear. In the car, the user can drive with preferably with both hands on the wheel and both eyes on the road. At home or in the office, the user can carry on other tasks while also carrying on a conversation.

Thus, it is no surprise that since the introduction of the cellular telephone service, the number of wireless telephone subscribers has increased steadily. Today, the number of wireless telephone subscribers is staggering and still growing rapidly. In fact, many households have multiple wireless telephones in addition to their conventional land-line services. Additionally, the popularity of speakerphones has grown as well. Almost every office telephone includes a speakerphone feature in today's modern workplace.

SUMMARY OF THE INVENTION

In the invention, a hands-free cellular telephone kit includes a device. The device is connected to a cellular or mobile telephone and a microphone is built into the device. The device receives, amplifies and retransmits through a speaker a communication from another cellular telephone user during a cellular telephone call.

Using the microphone, the device further retransmits a communication to the other cellular telephone user. The device advantageously permits these cellular telephone communications when the cellular telephone is positioned away from the user.

The hands-free mobile telephone kit has a device for use with a mobile telephone with a speaker system. The device is configured to receive, convert and transmit a first signal received by the mobile telephone from a remote signal source connected over a mobile connection to the mobile telephone, to a FM receiver of an audio system for subsequent audio transmission over a speaker system connected to said audio system. The device is further configured to receive and transmit the first signal for audio transmission over the mobile telephone. The device includes an audio-FM converter and a switch for selecting between enabling the speaker system of the mobile telephone and the speaker system of the audio system. An audio interface is connected to a microphone for receiving the first signal . The device has a FM transmitter for receiving the frequency information, for receiving the first signal from the audio interface, and for transmitting the first signal at a selected frequency based on the frequency information to the FM receiver.

The device also receives and transmits the first signal for audio transmission over the speaker of the mobile telephone.

The transmitter is configured for transmitting at a selected one of a plurality of available FM frequencies for transmitting the first signal to the FM receiver. Also, the transmitter is configured for transmitting at a selected one of a continuous range of available FM frequencies for transmitting the first signal to the FM receiver.

The device is further configured to attach to the mobile telephone.

In the hands-free kit, the switch is configured to perform the a selection between enabling the speaker system of the mobile telephone and the speaker system of the audio system during a mobile connection without breaking the mobile connection.

Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

A preferred structural system embodiment and preferred subcomponents of this invention are disclosed in the accompanying drawings in which:

Figure 1 is a perspective view of a plug and play dual

FM hands-free car kit in accordance with the present invention; Figure 2 is a perspective view of the plug and play dual FM hands-free car kit attached to a cellular telephone according to the present invention;

Figure 3 is a perspective view of the plug and play dual FM hands-free car kit attached to a cellular telephone and connected for use to the cigarette lighter in an automobile in accordance with the present invention;

Figure 4 is a block diagram of the plug and play dual

FM hands-free car kit as set forth in the present invention,- and

Figure 5A and 5B are schematic diagrams of the circuitry of the plug and play dual FM hands-free car kit in accordance with the present invention

DESCRIPTION OF THE INVENTION Although only one preferred embodiment of the invention is explained in detail, it is to be understood that other embodiments are possible. Accordingly, it is not intended that the invention is to be limited in its scope to the details of construction and arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways. Also, in describing the preferred embodiment, specific terminology will be resorted to for the sake of clarity. It is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar purpose.

As shown in Figure 1, the plug and play dual FM hands- free car kit is shown as a single device 10. The device 10 is a radio transmitter. It is designed and manufactured not to exceed the emission units for radio frequency (RF) energy set by the Federal Communications Commission (FCC) of the U.S. Federal Government. These limits are part of a comprehensive guidelines and establish permitted levels of RF energy for the general populations. The guidelines are based on standards that were developed by independent testing labs.

The device 10 has a number of connections. The first connection is the input and output connector or modular jack 12 which is connected to a cellular telephone. The impendence is set between 16-32 ohms. A one touch button 14 for talk/end and privacy is positioned on the front face 16 of the device 10. On one of the sides is an extended microphone jack 18 and a privacy earphone jack 20. The earphone impedance is set between 16-32 ohms. The device 10 includes a built-in microphone 22 and a LED indicator 24. At the opposite end of the modular jack 12, is a round connector 26 for plugging the device 10 into a standard lighter plug.

Figure 2 illustrates the device 10 connected to a modular cable 28. Also, there is a dual RF switch 30 which can be set to either channel one indicated by numeral 32 or channel two generally indicated by numeral 34. The FM frequency for channel one is 87.9 MHz. The FM frequency for channel two is 88.5 MHz ± 80kHz. The modular cable 28 is connected to a cellular or mobile telephone, indicated by numeral 36.

In Figure 3, the device 10 is connected to the modular jack 12 and the telephone cable 28 to the cellular or mobile telephone 36. At this point the radio 38 of the automobile is preset to a designated FM memory (87.9 or 88.3) station 40. When it is time to make or receive a telephone call, the radio is tuned to the preset station 40 and "SEND" is pressed on the cellular telephone 36. With the built-in microphone 22, talking and listening is done totally hands free.

Figure 4 illustrates the block diagram of the circuit of device 10.

In Figures 5A and 5B, the circuit is schematically presented.

For the charging and comparison circuit 44, R9 controls the charging of the electric current. The charging current is 220mA ± 20mA

U4 is a DC-DC converter which uses a step down method to change the power source from the vehicle battery (not shown) at 12 volts to +5 volts which is an ideal voltage for a cellular telephone. The operating voltage for the device is 9V to 28V.

L9 and C36 are for removing maximum AC ripple from the cellular telephone charging voltage of +5 volts.

R32, R58 and Q5 are used to adjust the output voltage. The charging voltage is through D6 and this is for charging the telephone battery.

For the comparison part, if the voltage from both ends of R34 is different, the output voltage of U5 gets lower and that makes the LED indicator 12 go to red. It receives a signal from D2 which indicates that charging is in progress.

Alternatively, if the voltage from both ends are the same, the output voltage of U5 gets higher and the LED indicator 12 is green from D2 which is on and indicates the completion of charging. The electric current separation circuit is indicated by reference numeral 46 and +12 voltages are used to make an electric current for charging the battery. A +5 VA is divided to provide a comparison power and hands free power.

The ground separation circuit 48 is for dividing a ground for charging and a ground for a hands free system.

The input, output connector 50 uses a signal in and out connector which is connected with the cellular telephone directly to perform the function of this system.

With reference to Figure 5B, numeral 52 generally indicates the microphone amplification circuit. The voice signal is amplified first at U1A, is amplified at U1B second time and that amplified signal is transferred to IN, OUT connector.

The caller voice signal amplification circuit 54 receives the other party (caller) 's voice signal through IN/OUT connector and removes noise on C15 and R52. This circuit also amplifies that signal on UIC and sends it to RF launching and amplification circuit 56. Additionally, part of this signal is sent to a noise removal circuit 58 and suppresses the noise, for example a howling sound from MIC signal and caller signal . The microphone impedance is Omni Directional at 2.2Kohm and the microphone sensitivity is set to -44 ± 3dB at 1kHz .

The RF launching and amplification circuit 56 launches the necessary frequency, makes a transmittable frequency using R2, D4, XI, Ql . The signal from R51 of 54 is changed in this circuit and transmitted wireless amplified FM frequency from Q2 , Q6 with the voice signal through ATI .

At the noise removal circuit 58, a suppression of the noise like a howling sound from MIC signal and the other party's voice signal occurs. The audio frequency response is about 100Hz to 20kHz ± 3dB. The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and, accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

Claims

The claims
1. A hands-free mobile telephone kit having a device for use with a mobile telephone with a speaker system, said device being configured to receive, convert and transmit a first signal received by said mobile telephone from a remote signal source connected over a mobile connection to the mobile telephone, to a FM receiver of an audio system for subsequent audio transmission over a speaker system connected to said audio system, and said device is further configured to receive and transmit said first signal for audio transmission over said mobile telephone, said device comprising: an audio-FM converter and a switch for selecting between enabling said speaker system of said mobile telephone and said speaker system of said audio system, an audio interface connected to a microphone for receiving said first signal, and a FM transmitter for receiving the frequency information, receiving said first signal from said audio interface, and transmitting said first signal at a selected frequency based on the frequency information to the FM receiver.
2. The hand-free kit of claim 1, wherein said device receives and transmits said first signal for audio transmission over said speaker of said mobile telephone.
3. The hands-free kit of claim 1, wherein the transmitter is configured for transmitting at a selected one of a plurality of available FM frequencies for transmitting the first signal to the FM receiver.
4. The hands-free kit of claim 1, wherein the transmitter is configured for transmitting at a selected one of a continuous range of available FM frequencies for transmitting the first signal to the FM receiver.
5. The hands-free kit of claim 1, wherein said device is further configured to attach to said mobile telephone.
6. The hands-free kit of claim 1, wherein said switch is configured to perform said selecting between enabling said speaker system of said mobile telephone and said speaker system of said audio system during a mobile connection without breaking the mobile connection.
PCT/US2002/039854 2001-12-13 2002-12-13 Plug and play dual fm hands-free car kit WO2003052947A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US33910001 true 2001-12-13 2001-12-13
US60/339,100 2001-12-13

Publications (2)

Publication Number Publication Date
WO2003052947A2 true true WO2003052947A2 (en) 2003-06-26
WO2003052947A3 true WO2003052947A3 (en) 2004-03-18

Family

ID=23327499

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/039854 WO2003052947A3 (en) 2001-12-13 2002-12-13 Plug and play dual fm hands-free car kit

Country Status (1)

Country Link
WO (1) WO2003052947A3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914527A1 (en) * 2007-03-28 2008-10-03 Parrot Sa Interface device i.e. hands-free adapter, for relaying audio signals from audio signal source e.g. wireless telephone, has CPU activating functionality and alarm, if presence of signal is detected and not detected, respectively
US7676250B2 (en) 2006-06-02 2010-03-09 Motorola, Inc. Method for controlling audio signals to an FM transmitter and a loudspeaker of a hands-free adapter
US7986928B2 (en) 2007-12-07 2011-07-26 Motorola Mobility, Inc. Method and apparatus for selecting a radio channel for transmitting an audio signal to a radio local receiver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304764B1 (en) * 1999-01-06 2001-10-16 Priority Tech, Inc. Hands-free cellular phone kit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304764B1 (en) * 1999-01-06 2001-10-16 Priority Tech, Inc. Hands-free cellular phone kit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7676250B2 (en) 2006-06-02 2010-03-09 Motorola, Inc. Method for controlling audio signals to an FM transmitter and a loudspeaker of a hands-free adapter
FR2914527A1 (en) * 2007-03-28 2008-10-03 Parrot Sa Interface device i.e. hands-free adapter, for relaying audio signals from audio signal source e.g. wireless telephone, has CPU activating functionality and alarm, if presence of signal is detected and not detected, respectively
WO2008132353A2 (en) * 2007-03-28 2008-11-06 Parrot Hands-free car adaptor for mobile telephones with built-in fm transmitter, in which functions are conditionally activated according to the frequency matching status in relation to the frequency of the associated radio set
WO2008132353A3 (en) * 2007-03-28 2009-02-05 Parrot Hands-free car adaptor for mobile telephones with built-in fm transmitter, in which functions are conditionally activated according to the frequency matching status in relation to the frequency of the associated radio set
US7986928B2 (en) 2007-12-07 2011-07-26 Motorola Mobility, Inc. Method and apparatus for selecting a radio channel for transmitting an audio signal to a radio local receiver

Also Published As

Publication number Publication date Type
WO2003052947A3 (en) 2004-03-18 application

Similar Documents

Publication Publication Date Title
US5113428A (en) Cordless telephone headset
US7742790B2 (en) Environmental noise reduction and cancellation for a communication device including for a wireless and cellular telephone
US6459882B1 (en) Inductive communication system and method
US5838665A (en) Data network telephone adaptor device
US20080220718A1 (en) Bluetooth Communication System for Drivers of Vehicules
US6434402B1 (en) Accessory device for handling multiple calls on multiple mobile stations
US5191602A (en) Cellular telephone headset
US7117021B2 (en) Bluetooth cassette-like device for a hands-free cell-phone kit
US20090017868A1 (en) Point-to-Point Wireless Audio Transmission
US6081724A (en) Portable communication device and accessory system
US20030032460A1 (en) Multi-user hands-free wireless telephone gateway
US6792291B1 (en) Interface device for control of a cellular phone through voice commands
US20040147282A1 (en) Electronic apparatus having a wireless communication device communicating with at least two device
US5953674A (en) Asynchronous serial communications on a portable communication device serial communication bus
US7706821B2 (en) Noise reduction system and method suitable for hands free communication devices
US20050282592A1 (en) Hands-free conferencing apparatus and method for use with a wireless telephone
EP1670283A1 (en) Bluetooth headset
US20040204159A1 (en) Activation system and method for establishing a cellular voice communication through a radio system
US20110316664A1 (en) Remote control for sound system
US20070173293A1 (en) Mobile phone hand-free extension device
US5903135A (en) Cellular telephone battery recharger device with digital recording system and speaker phone
US20070260682A1 (en) Wireless communications connection device
US6173195B1 (en) Wireless mobile telephone adapter for automobiles
US5881370A (en) Communication apparatus with an automatically configured multimode talk switch and method of operation
US5937334A (en) Radio communications and telephone network interface system

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP