Electronic apparatus and method of controlling driving of speaker

A technology for electronic equipment and electric speakers, which can be applied to instruments, sensors, electrical components, etc., and can solve the problem of reducing power consumption by half.

A technology for electronic equipment and electric speakers, which can be applied to instruments, sensors, electrical components, etc., and can solve the problem of reducing power consumption by half.

CN1901753AInactive Publication Date: 2007-01-24KK TOSHIBA
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  • Electronic apparatus and method of controlling driving of speaker
  • Electronic apparatus and method of controlling driving of speaker
  • Electronic apparatus and method of controlling driving of speaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Embodiments of the present invention will be described below with reference to the drawings.

[0024] First refer to Figure 1 to Figure 3 The structure of the portable electronic device according to the embodiment of the present invention is explained. The electronic device is implemented, for example, as a portable personal notebook computer 10 that can be driven by a battery.

[0025] figure 1 is a perspective view of the notebook personal computer 10 with its display unit opened. The main body of the computer 10 is constituted by a bottom unit 11 and a display unit 12 . A display device 20 constituted by an LCD (Liquid Crystal Display) is built into the inner surface of the display unit 12 . The display screen of the LCD 20 is approximately disposed at the center of the display unit 12 . In addition, two piezoelectric speakers 16 a and 16 b are provided on the inner surface of the display unit 12 . The piezoelectric speaker 16a serves as an L-channel speaker, ...

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Abstract

A computer 10 is provided with piezoelectric speakers 16a and 16b, and dynamic loudspeakers 17a and 17b. An EC / KBC 160 determines which drives the computer 10 between an external source and a battery 181. When the computer 10 is driven by the external source, the EC / KBC 160 allows the dynamic loudspeakers 17a and 17b to be driven. Meanwhile, when the computer 10 is driven by the battery 181, the EC / KBC 160 allows the piezoelectric loudspeakers 16a and 16b to be driven and inhibits the dynamic loudspeakers 17a and 17b from being driven.

Description

technical field [0001] The present invention relates to an electronic device such as a portable computer and a method of controlling the driving of a speaker used in the electronic device. Background technique [0002] In general, portable personal computers including the same AV functions as audio video (AV) equipment such as DVD (Digital Versatile Disc) players and TV units are equipped with electrodynamic speakers as speakers for playing audio signals. An electrodynamic speaker is a type of speaker that outputs sound by passing an electric current through a coil placed in a magnetic field to vibrate a diaphragm. Electrodynamic speakers can play high-quality audio signals while consuming relatively large amounts of electrical power. [0003] On the other hand, a piezoelectric speaker is known as a speaker with low power consumption. A piezoelectric speaker is a type of speaker that uses a piezoelectric element to convert an electrical sig...

Claims

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Application Information

Patent Timeline
24 Jan 2007
Publication
CN1901753A
IPC
H04R1/20; H04R3/00; G06F1/16
CPC
H04R5/04
Inventors
齐藤和行