Title:
SPEAKER
Document Type and Number:
WIPO Patent Application WO/2018/103173
Kind Code:
A1
Abstract:
The present invention relates to a novel active/passive dual-purpose speaker, comprising an adaptive active speaker/passive speaker switch, so that when the speaker is not connected to an AC power supply via a power line or a power interface, one end of an audio input/output terminal of the speaker is used to connect to an output terminal of an external audio amplifier, for receiving an audio signal, and the other end thereof is connected to an output end of an audio power amplifier inside the speaker and directly connected to a loudspeaker of the speaker, so that the speaker is in a passive speaker state; and when the speaker is connected to the AC power supply via the power line or the power interface, the audio input/output terminal is used to connect to an audio signal source, an audio signal is amplified by the audio power amplifier inside the speaker, and the audio power amplifier inside the speaker drives the loudspeaker of the speaker, so that the speaker is automatically switched to an active speaker state. The audio power amplifier inside the speaker is fixed on a board surface of a sound-conducting board opposite to the speaker, and a metal heat sink is provided on the audio power amplifier inside the speaker.
Inventors:
ZHENG WENYAN (CN)
Application Number:
PCT/CN2017/000649
Publication Date:
June 14, 2018
Filing Date:
October 30, 2017
Export Citation:
Assignee:
ZHENG WENYAN (CN)
International Classes:
H04R1/02
Domestic Patent References:
| WO2009039597A1 | 2009-04-02 |
Foreign References:
| CN106507230A | 2017-03-15 | |||
| CN2659070Y | 2004-11-24 | |||
| CN101321404A | 2008-12-10 |
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