Mobile communications terminal with a hands-free mode

• US 20040043796A1
• Filed: 04/09/2003
• Published: 03/04/2004
• Est. Priority Date: 04/09/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: BenQ Corporation (Qisda Corporation)
• Inventors: Aubauer, Roland, Lorenz, Frank, Klinke, Stefano Ambrosius, Hulskemper, Michael, Poerschmann, Christoph
• Granted Patent: US 7,058,430 B2
• Time in Patent Office: Days
• US Class Current: 455/569.1
• CPC Class Codes: H04M 1/605 involving control of the receiver volume to provide a dual operational mode at close or far distance from the user

Abstract

A mobile communications terminal is provided having a first loudspeaker for emitting sound signals in a normal mode of the communications terminal, a second loudspeaker for emitting sound signals in a hands-free mode of the communications terminal, an antenna and a signal processing device for processing signals which have been received by the antenna and for supplying processed signals to the first loudspeaker and to the second loudspeaker depending on whether the communications terminal is in the normal mode or in the hands-free mode, wherein better high-frequency reproduction in a hands-free mode is achieved in that, in the hands-free mode, the signal processing device is designed to supply processed signals at a frequency of more than 1 kHz to the first loudspeaker and the first loudspeaker is designed to reproduce sound signals at a frequency of more than 1 kHz.

Claims

1. A mobile communications terminal, comprising:

a first loudspeaker for emitting sound signals in a normal mode of the communications terminal;

a second loudspeaker for emitting sound signals in a hands-free mode of the communications terminal;

an antenna; and

a signal processing device for processing signals which have been received by the antenna and for supplying processed signals to the first and second loudspeakers depending on whether the communications terminal is in the normal or hands-free mode, wherein, in the hands-free mode, the signal processing device supplies the processed signals at a frequency of more than 500 Hz to the first loudspeaker, and the first loudspeaker reproduces sound signals at a frequency of more than 500 Hz.

2. A mobile communications terminal as claimed in claim 1, wherein the first loudspeaker is arranged on the front face of the communications terminal, and the second loudspeaker is arranged on the rear face of the communications terminal.

3. A mobile communications terminal as claimed in claim 1, wherein, in the hands-free mode, the signal processing device supplies processed signals at a frequency of less than 500 Hz to the second loudspeaker.

4. A mobile communications terminal as claimed in claim 1, wherein, in the hands-free mode, the signal processing device matches intensities of the sound signals which are emitted from the first and second loudspeakers to a natural spectral intensity profile, as a function of the relative arrangement of the first and second loudspeakers with respect to one another.

5. A method for emitting sound signals from a mobile communications terminal, the method comprising the steps of:

emitted the sound signals via a first loudspeaker for a normal mode of the communications terminal; and

emitted the sound signals via a second loudspeaker for a hands-free mode of the communications terminal, wherein, in the hands-free mode, signals in a frequency range above 1 kHz is supplied to the first loudspeaker for emission.

6. A method for emitting sound signals from a mobile communications terminal as claimed in claim 5, wherein, in the hands-free mode, the signals in the frequency range above 1 kHz are supplied exclusively to the first loudspeaker, and signals in a frequency range below 1 kHz is supplied exclusively to the second loudspeaker.

7. A method for emitting sound signals from a mobile communications terminal as claimed in claim 5, the method further comprising the step of matching intensities, in the hands-free mode and via a signal processing device, of the sound signals which are emitted from the first and second loudspeakers to a natural spectral intensity profile as a function of a relative arrangement of the first and second loudspeakers with respect to one another.

8. A method for emitting sound signals from a mobile communications terminal as claimed in claim 6, the method further comprising the step of matching intensities, in the hands-free mode and via a signal processing device, of the sound signals which are emitted from the first and second loudspeakers to a natural spectral intensity profile as a function of a relative arrangement of the first and second loudspeakers with respect to one another.