Unlock instant, AI-driven research and patent intelligence for your innovation.

Bluetooth vehicle mounted hand-free device

A vehicle hands-free, Bluetooth technology, applied in the direction of using transceiver near-field transmission system, electrical components, transmission system, etc., can solve the problem of no frequency modulation fixed-point transmission function, single function, transmission out, etc., to increase the visibility Sex, more fun and convenience, the effect of increasing safety

Inactive Publication Date: 2008-12-31
杜野
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing Bluetooth car hands-free devices usually use the buttons on the casing to perform operations such as starting up, answering calls, hanging up, and shutting down. The sound source can be transmitted within an effective distance. If it can have a transmitting function like a transmitter, it will bring great convenience to the user. The call is transmitted through the FM transmitter module, and the FM receiver of the car is tuned to the same frequency point for reception, so that it is very convenient to make a call and improve the safety of driving; this method can also be used to play music in the mobile phone

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bluetooth vehicle mounted hand-free device
  • Bluetooth vehicle mounted hand-free device
  • Bluetooth vehicle mounted hand-free device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, please refer to figure 1 , Bluetooth car hands-free device includes Bluetooth module, power management module, FM transmitter module and LCD module, power management module provides power for Bluetooth module, FM transmitter module, LCD module and other modules, LCD module Connect to the Bluetooth module and the FM transmitter module respectively. The bluetooth module receives the signal of the bluetooth device (such as the bluetooth mobile phone) connected with it through the antenna, and outputs the audio signal through the audio output terminal, and the audio signal is divided into two paths, one of which is output to the audio socket, and the earplugs can be connected through the audio socket. The other output is to the FM transmitter module, which is converted into a radio frequency signal by the FM transmitter module and transmitted through the antenna of the FM transmitter module. After the FM receiver of the car is tuned to the same frequency, it c...

Embodiment 2

[0021] Embodiment 2. The difference from Embodiment 1 is that the frequency emitted by the FM transmitter module has a certain range, for example, 87.5 MHz to 108.0 MHz. The Bluetooth car hands-free device also includes a frequency adjustment unit for receiving user selection, the frequency adjustment unit is electrically connected with the FM transmitter module, and within this frequency range, the FM transmitter module can adjust the frequency in this range through the frequency adjustment unit. Adjustment.

[0022] Such as figure 2 As shown, the frequency adjustment unit is an adjustable resistor, and the two ends and the adjustable end of the adjustable resistor are respectively coupled to the FM transmitting module, and the FM transmitting module performs frequency adjustment according to the voltage division of the adjustable resistor.

[0023] The FM transmitter module can also use several fixed-point frequencies, such as image 3 As shown, the frequency adjustment u...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Transmit poweraaaaaaaaaa
Login to View More

Abstract

The invention discloses a Bluetooth car-carried hand-free device which comprises a Bluetooth module, a power management module which is electrically connected with and provides power for the Bluetooth module, as well as frequency-modulation transmitting module groups which are respectively and electrically connected with an audio output end of the Bluetooth module and the power management module. Through the frequency-modulation transmitting module groups, the Bluetooth car-carried hand-free device of the invention realizes that a sound source is received by the Bluetooth module and is sent out with certain frequency point by the frequency-modulation transmitting module groups; finally, after being modulated to the same frequency point as that of the frequency-modulation transmitting module groups, a frequency-modulation receiving device can receive the sound source. The adoption of the technical proposal of the invention can realize the function of receiving the sound source in a wireless manner through the Bluetooth module, cause multiple frequency-modulation receiving devices to share one sound source in an effective distance and use a car-carried frequency-modulation receiving device for receiving the sound source.

Description

【Technical field】 [0001] The invention relates to a Bluetooth vehicle-mounted hands-free device, in particular to a Bluetooth vehicle-mounted hands-free device with a frequency modulation transmitting function. 【Background technique】 [0002] With the improvement of people's safety awareness and convenience requirements, the Bluetooth car hands-free device realized by Bluetooth technology is applied to the car. After the user enters the car, the Bluetooth car hands-free device is connected to the user's Bluetooth mobile phone. When driving, the user can complete functions such as redialing the last digit, answering, hanging up, and volume adjustment without operating the mobile phone by hand. However, the existing Bluetooth car hands-free devices usually use the buttons on the casing to perform operations such as starting up, answering calls, hanging up, and shutting down. The sound source can be transmitted within an effective distance. If it can have a transmitting functi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04B1/38H04B5/02H04B1/3822
Inventor 张利华
Owner 杜野
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement