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Circuit board for mobile communication terminal having ultrasonic wave speaker system

A mobile communication terminal, ultrasonic technology, applied in ultrasonic/sonic/infrasonic transmission systems, transmission systems, printed circuits, etc., can solve problems such as difficult to achieve high-performance hands-free phones

Inactive Publication Date: 2007-03-07
SOLITONIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, since the echo generated by the sound output through the speaker is reflected and input to the microphone of the terminal, it is technically difficult to implement a high-performance hands-free phone

Method used

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  • Circuit board for mobile communication terminal having ultrasonic wave speaker system
  • Circuit board for mobile communication terminal having ultrasonic wave speaker system
  • Circuit board for mobile communication terminal having ultrasonic wave speaker system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0025] Preferred embodiments of the present invention will be described in detail.

[0026] FIG. 1 shows the structure of a circuit board of a mobile communication terminal with an ultrasonic microspeaker according to a first embodiment of the present invention.

[0027] Referring to Fig. 1, mobile communication terminal circuit board, i.e. mobile communication terminal printed circuit board (PCB) 100 comprises: baseband chip 110, is used for output signal; It is modulated into an ultrasonic segment signal; the ultrasonic speaker 130 is used to output the ultrasonic signal output from the ultrasonic driving chip 120 to the outside; and the power supply unit 140 is used to supply power to the ultrasonic driving chip 120 .

[0028] In the case where a user makes a phone call through a mobile communication terminal in the user's hand, it is natural to speak through a microphone if an audible sound field is formed within 40 to 60 cm of the user's face area. Therefore, preferably,...

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PUM

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Abstract

Disclosed is a mobile communication terminal circuit board provided with an ultrasonic loudspeaker system which is used in the wireless broadcast or video communication to eliminate the echo without any of additive device. The mobile communication circuit board comprises: a baseband chip for processing the audio data; an ultrasonic driving chip for receiving the signal outputted from the baseband chip and modulating the same to generate an ultrasonic band signal; and an ultrasonic loudspeaker for outputting the ultrasonic signal generated from the ultrasonic driving chip to the exterior.

Description

technical field [0001] The present invention generally relates to mobile communication terminals, and more particularly to a mobile communication terminal circuit board with an ultrasonic speaker system. Background technique [0002] Recently, with the rapid development of the information society, it is necessary to develop a combination type communication terminal having various additional functions in addition to a simple voice transmission function. [0003] In response to this demand, a mobile communication terminal (so-called "camera phone") has been developed. Since such a mobile communication terminal has a digital video camera function in addition to the same voice call function as a conventional mobile communication terminal, it can wirelessly transmit images captured by a digital video camera to another terminal, and can also transmit mobile communication When the terminal is connected to a PC (personal computer), an image is output through the display screen of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40
CPCH04M1/03H04B11/00H05K1/181H04R2217/03H04R17/00H04N7/142H04R2499/11H04B1/40
Inventor 罗景民
Owner SOLITONIX