CN212519402U - Television panel for switching working states of earphones and loudspeakers - Google Patents
Television panel for switching working states of earphones and loudspeakers Download PDFInfo
- Publication number
- CN212519402U CN212519402U CN202021525100.3U CN202021525100U CN212519402U CN 212519402 U CN212519402 U CN 212519402U CN 202021525100 U CN202021525100 U CN 202021525100U CN 212519402 U CN212519402 U CN 212519402U
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- pin
- earphone
- terminal
- earphones
- loudspeakers
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Abstract
The utility model relates to a television set for earphone and loudspeaker operating condition switches, including earphone terminal JA2, earphone terminal JA2 has four pins, wherein, first pin and second pin form first shell fragment terminal, third pin and fourth pin form the second shell fragment terminal, first pin and fourth pin are used for being connected to power amplifier module's sound input AMP-LIN1 respectively, the second pin is used for connecting audio signal AMP-AUOUTL 0's left channel, the third pin is used for connecting audio signal AMP-AUOUTR 0's right channel, earphone terminal JA2 still is used for ground connection. The television panel for switching the working states of the earphones and the loudspeakers realizes that the detection-free circuit switches the working states of the earphones and the loudspeakers, and has high switching efficiency and good effect.
Description
Technical Field
The utility model relates to an audio signal output device technical field, in particular to a TV board that is used for earphone and loudspeaker operating condition to switch.
Background
Most earphone detection circuitry on the market has 4 to 5 components to constitute more or less, utilizes the function of earphone terminal shell fragment, judges to give the high-low level of master control IC and detects whether insert the earphone, realizes the switching of loudspeaker and earphone sound outward. As shown in fig. 1, when the left and right sound channels of the audio output signal 10 are connected in parallel to the power amplifier module 30 and the earphone terminal 20, the power amplifier module 30 outputs the audio signal to the speaker 60, and the speaker 60 is voiced; when the earphone 50 is inserted, the detection circuit 40 acts to give a low potential signal to the power amplification module 30, and at this time, the speaker 60 is silent and the earphone 50 is voiced.
The working states of the earphone and the loudspeaker are switched through the detection circuit 40, the switching speed is low, and the problem of switching errors also exists.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a television panel for switching the working states of the earphones and the loudspeakers, aiming at the problems that the switching speed is low and switching errors exist when the working states of the earphones and the loudspeakers are switched by the detection circuit at present.
A television panel for switching the working state of earphones and loudspeakers comprises an earphone terminal JA2, wherein the earphone terminal JA2 is provided with four pins, a first pin and a second pin form a first shrapnel terminal, a third pin and a fourth pin form a second shrapnel terminal,
the first pin and the fourth pin are respectively used for being connected to a sound input end AMP-LIN1 of the power amplifier module, the second pin is used for being connected to a left channel of an audio signal AMP-AUOUTL0, the third pin is used for being connected to a right channel of the audio signal AMP-AUOUTR0, and the earphone terminal JA2 is also used for being grounded.
According to the television panel for switching the working states of the earphone and the loudspeaker, the first pin and the second pin form the first elastic sheet terminal, so that the first pin and the second pin can be communicated or separated, and the third pin and the fourth pin form the second elastic sheet terminal, so that the third pin and the fourth pin can be communicated or separated; when the earphone is not inserted, the third pin is communicated with the fourth pin, the first pin is communicated with the second pin, the right sound channel of the audio signal AMP-AUOUTR0 is accessed through the third pin and is output to the power amplifier module through the fourth pin, the left sound channel of the audio signal AMP-AUOUTL0 is accessed through the second pin and is output to the power amplifier module through the first pin, and at the moment, the loudspeaker has sound; when the earphone is inserted, the third pin and the fourth pin are disconnected and then separated, the first pin and the second pin are disconnected and then separated, no audio signal is output from the first pin and the fourth pin, the audio signals AMP-AUOUTR0/AMP-AUOUTL0 left and right sound channels are output to the earphone through the third pin and the second pin respectively, the loudspeaker is silent, and the earphone has sound. The television panel for switching the working states of the earphones and the loudspeakers realizes that the detection-free circuit switches the working states of the earphones and the loudspeakers, reduces electronic elements, saves cost, improves switching efficiency and has good switching effect.
Drawings
Fig. 1 is a block diagram of a detection circuit of a television board for switching the working states of earphones and loudspeakers in the prior art;
fig. 2 is a circuit diagram of a television board in which the operating states of the earphones and the speakers are switched according to one embodiment.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
As shown in fig. 2, a television set for switching the working states of earphones and speakers comprises an earphone terminal JA2, wherein the earphone terminal JA2 has four pins, a first pin 1 and a second pin 2 form a first dome terminal, and a third pin 3 and a fourth pin 4 form a second dome terminal. The earphone terminal JA2 also has a fifth pin 5, the fifth pin 5 being for ground.
The first pin 1 and the fourth pin 4 are respectively used for being connected to a sound input end AMP-LIN1 of the power amplifier module, the second pin 2 is used for being connected to a left channel of an audio signal AMP-AUOUTL0, the third pin 3 is used for being connected to a right channel of the audio signal AMP-AUOUTR0, and the earphone terminal JA2 is also used for being grounded.
In the television panel for switching the working states of the earphone and the loudspeaker, the first pin 1 and the second pin 2 form a first elastic sheet terminal, so that the first pin 1 and the second pin 2 can be communicated or separated, and the third pin 3 and the fourth pin 4 form a second elastic sheet terminal, so that the third pin 3 and the fourth pin 4 can be communicated or separated; when the earphone is not inserted, the third pin 3 is communicated with the fourth pin 4, the first pin 1 is communicated with the second pin 2, the right channel of the audio signal AMP-AUOUTR0 is accessed through the third pin 3 and is output to the power amplifier module through the fourth pin 4, the left channel of the audio signal AMP-AUOUTL0 is accessed through the second pin 2 and is output to the power amplifier module through the first pin 1, and at this time, the loudspeaker has sound; when the earphone is inserted, the third pin 3 and the fourth pin 4 are disconnected and then separated, the first pin 1 and the second pin 2 are disconnected and then separated, at this time, no audio signal is output from the first pin 1 and the fourth pin 4, the audio signals AMP-AUOUTR0/AMP-AUOUTL0 left and right channels are output to the earphone through the third pin 3 and the second pin 2 respectively, at this time, the loudspeaker is silent, and the earphone has sound. The television panel for switching the working states of the earphones and the loudspeakers realizes that the detection-free circuit switches the working states of the earphones and the loudspeakers, reduces electronic elements, saves cost, improves switching efficiency and has good switching effect.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (1)
1. A television panel for switching the working state of earphones and loudspeakers is characterized by comprising an earphone terminal JA2, wherein the earphone terminal JA2 is provided with four pins, a first pin and a second pin form a first elastic sheet terminal, a third pin and a fourth pin form a second elastic sheet terminal,
the first pin and the fourth pin are respectively used for being connected to a sound input end AMP-LIN1 of the power amplifier module, the second pin is used for being connected with a left channel of an audio signal AMP-AUOUTL0, the third pin is used for being connected with a right channel of the audio signal AMP-AUOUTR0, and the earphone terminal JA2 is also used for being grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021525100.3U CN212519402U (en) | 2020-07-28 | 2020-07-28 | Television panel for switching working states of earphones and loudspeakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021525100.3U CN212519402U (en) | 2020-07-28 | 2020-07-28 | Television panel for switching working states of earphones and loudspeakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212519402U true CN212519402U (en) | 2021-02-09 |
Family
ID=74443457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021525100.3U Expired - Fee Related CN212519402U (en) | 2020-07-28 | 2020-07-28 | Television panel for switching working states of earphones and loudspeakers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212519402U (en) |
-
2020
- 2020-07-28 CN CN202021525100.3U patent/CN212519402U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210209 Termination date: 20210728 |