Sound reproducing system and method for portable terminal device

• US 20040023697A1
• Filed: 07/25/2003
• Published: 02/05/2004
• Est. Priority Date: 09/27/2000
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Komura, Tatsumi
• Granted Patent: US 7,702,320 B2
• Time in Patent Office: Days
• US Class Current: 455/569.1
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0235 Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
• CPC Class Codes: H04M 1/03 Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
• CPC Class Codes: H04R 1/025 Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
• CPC Class Codes: H04R 2499/15 Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
• CPC Class Codes: H04R 5/02 Spatial or constructional arrangements of loudspeakers

Abstract

A portable information terminal having high adaptability and high convenience with respect to operating environment, and by which comfortable and high-quality sounds can be reproduced is provided.

A sound reproducing system in a portable information terminal 1, wherein the portable information terminal is provided with at least two acoustic loudspeakers 2a and 2b; and the at least two acoustic loudspeakers are driven simultaneously to compensate their reproduced sounds with each other.

Claims

1. A reproducing system in a portable information terminal, characterized in that:

the portable information terminal is provided with at least two acoustic loudspeakers; and

said at least two acoustic loudspeakers are driven simultaneously to compensate their reproduced sounds with each other.

2. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said at least two acoustic loudspeakers are either disposed on said portable information terminal in a longitudinal direction thereof, or disposed diagonally at the opposite ends of the portable information terminal.

3. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

at least one member selected from said at least two acoustic loudspeakers is located at a certain angle with respect to a cabinet wall of said portable information terminal.

4. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

an angle defined by at least one acoustic loudspeaker selected from said at least two acoustic loudspeakers and said cabinet wall of the portable information terminal can be freely changed.

5. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

each angle of said at least two acoustic loudspeakers may be freely changed.

6. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

a cross talk barrier is placed between said at least two acoustic loudspeakers, and said cross talk barrier prevents from generating cross talk from individual acoustic loudspeakers.

7. The reproducing system in a portable information terminal as claimed in claim 6, characterized in that:

said cross talk barrier is collapsible or detachable.

8. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said portable information terminal is provided with a signal processing circuit for eliminating cross talk; and

said signal processing circuit for eliminating cross talk processes input signals of said at least two acoustic loudspeakers to eliminate cross talk.

9. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

at least one member selected from said at least two acoustic loudspeakers is located at a fallen position from a position of a cabinet wall of the portable information terminal.

10. The reproducing system in a portable information terminal as claimed in claim 9, characterized in that:

either a part or the whole of said at least one acoustic loudspeaker is covered with a perforated section of a cabinet wall of said portable information terminal, or a cabinet wall covering a vibrating surface of said loudspeaker is removed.

11. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

at least one acoustic loudspeaker selected from said at least two acoustic loudspeakers is protruded from a side of opposite ends of said portable information terminal.

12. The reproducing system in a portable information terminal as claimed in claim 11, characterized in that:

said at least one acoustic loudspeaker is located at a deeper position from the front of said portable information terminal; and

either a part of said at least one acoustic loudspeaker is covered with a perforated section of a cabinet wall of said portable information terminal, or a cabinet wall covering a vibrating surface of said at least one acoustic loudspeaker is removed.

13. The reproducing system in a portable information terminal as claimed in claim 11, characterized in that:

said at least one protruded acoustic loudspeaker is contained inside said portable information terminal.

14. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said at least two acoustic loudspeakers are arranged in a row of a speaker array in said portable information terminal.

15. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said at least two acoustic loudspeakers are arranged in said portable information terminal so as to direct different directions from one another.

16. The reproducing system in a portable information terminal as claimed in claim 15, characterized in that:

said at least two acoustic loudspeakers reproduce sounds in such that different sounds are listened individually in different directions.

17. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said portable information terminal is provided with a signal processing circuit for converging directivity; and

said signal processing circuit for converging directivity processes input signals of said at least two acoustic loudspeakers to converge directions of directivity.

18. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said portable information terminal is provided with an omnidirectional signal processing circuit; and

said omnidirectional signal processing circuit processes input signals of said at least two acoustic loudspeakers to make them omnidirectional.

19. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said portable information terminal is provided with a signal processing circuit for converging directions of said at least two acoustic loudspeakers with respect to their directivities and an omnidirectional signal processing circuit for making said at least two acoustic loudspeakers omnidirectional; and

said signal processing circuit for converging directivity and said omnidirectional signal processing circuit are selected alternatively.

20. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said at least two acoustic loudspeakers having high efficiency are used, whereby it becomes possible to drive said at least two acoustic loudspeakers in case of reproducing sounds without employing any amplifier.

21. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

individual sounds are reproduced from said at least two acoustic loudspeakers; and

sound volumes of the individual sounds can be uniquely adjusted.

22. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said at least two acoustic loudspeakers have characteristics specialized to middle- to high-pitched tone ranges, and that specialized to a low-pitched tone range, respectively.

23. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

at least one member selected from said at least two acoustic loudspeakers is arranged in such that when said portable information terminal is placed to be in contact with a plane including a desk, a floor, and a wall surface, said at least one acoustic loudspeaker can utilize reflection of sounds.

24. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

at least one member selected from said at least two acoustic loudspeakers can reproduce sounds simultaneously with a phone call by means of said portable information terminal.

25. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

acoustic sound reproducing signals of said at least one acoustic loudspeaker are transmitted so as to be able to listen also by the other party of communication.

26. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

at least one member selected from said at least two acoustic loudspeakers is the one serving both as a acoustic loudspeaker and a device of said portable information terminal including an acoustic loudspeaker serving also as a speaking microphone, an acoustic loudspeaker serving also as a receiving speaker, an acoustic loudspeaker serving also as a ringer, an acoustic loudspeaker serving also as a vibrator, an acoustic loudspeaker serving also as a screen display monitor, and an acoustic loudspeaker serving also as a key panel.

27. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

an acoustic signal generator is connected to said portable information terminal;

said acoustic signal generator stores acoustic sound data; and

said at least two acoustic loudspeakers reproduce sounds based on said acoustic sound data obtained from said acoustic signal generator.

28. The reproducing system in a portable information terminal as claimed in claim 27, characterized in that:

a plurality of said acoustic signal generators is connected to said portable information terminal; and

any of the acoustic signal generators from which data is to be acquired is changed over by a switch.

29. The reproducing system in a portable information terminal as claimed in claim 27, characterized in that:

said at least two acoustic loudspeakers are allowed to be able to reproduce sounds without employing any amplifier; and

they are made to be able to reproduce sounds of said acoustic sound data obtained from said acoustic signal generator in a condition where a power supply in said portable information terminal itself has been shut off.

30. The reproducing system in a portable information terminal as claimed in claim 27, characterized in that:

said portable information terminal acquires data from said acoustic signal generator through radio wave.

31. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

a headphone or an earphone is connected to said portable information terminal; and

reproduced sounds are listened by means of said headphone or earphone in place of said at least two acoustic loudspeakers.

32. The reproducing system in a portable information terminal as claimed in claim 31, characterized in that:

reproduced sounds from said at least two acoustic loudspeakers are listened simultaneously with a communication message in said portable information terminal by means of said headphone or earphone.

33. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said portable information terminal is extensible.

34. The reproducing system in a portable information terminal as claimed in claim 1, characterized in that:

said portable information terminal is collapsible.

35. A method for reproducing sounds in a portable information terminal, characterized in that:

at least two acoustic loudspeakers disposed in the portable information terminal are driven at the same time to compensate reproduced sounds with each other.