公开(公告)号：US11166103B2

公开(公告)日：2021-11-02

申请号：US16651340

申请日：2018-09-25

Applicant: HUIZHOU TCL MOBILE COMMUNICATION CO., LTD.

Inventor： Min Yao ,  Mingliang Liu ,  Chunxia Yan

IPC: H04R5/04 ,  H04R1/10 ,  H04R3/04 ,  H04R5/033

Abstract: The present disclosure provides a playing device and a playing method based on the playing device. The playing device includes a headphone interface circuit and a speaker circuit. Signal input terminals of the headphone interface circuit and the speaker circuit are directly connected to a sound source output terminal of the playing device. The signal input terminal of the speaker circuit is connected to a first enable signal output terminal when the first enable signal output terminal outputs a matched enable signal, a sound source signal output from the sound source output terminal is played by the speaker circuit. The signal input terminal of the headphone interface circuit is connected to a second enable signal output terminal. When a headphone is inserted and the second enable signal output terminal outputs a matched enable signal, a sound source signal output from the sound source output terminal is played by the headphone.

公开(公告)号：US11159871B2

公开(公告)日：2021-10-26

申请号：US16651332

申请日：2018-09-25

Applicant: HUIZHOU TCL MOBILE COMMUNICATION CO., LTD.

Inventor： Chunxia Yan ,  Mingliang Liu ,  Min Yao

IPC: H04R1/10

Abstract: The present disclosure provides a signal transmission circuit, a signal transmission system, a signal transmission method, and an intelligent terminal. The signal transmission circuit includes an earphone interface circuit, a comparison circuit, and a control circuit. The earphone interface circuit is configured for connection to an audio receiving device. The comparison circuit is configured to acquire a voltage value corresponding to an impedance of the audio receiving device via the earphone interface circuit, the voltage value is compared with a reference voltage of the comparison circuit, to output a comparison result to the control circuit. The control circuit judges whether the audio receiving device is a digital audio device according to the comparison result, and switches the earphone interface circuit to digital output when the audio receiving device is determined to be a digital audio device.