CN110662136A - Audio device and display panel - Google Patents
Audio device and display panel Download PDFInfo
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- CN110662136A CN110662136A CN201910898664.7A CN201910898664A CN110662136A CN 110662136 A CN110662136 A CN 110662136A CN 201910898664 A CN201910898664 A CN 201910898664A CN 110662136 A CN110662136 A CN 110662136A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The embodiment of the application discloses an audio device and a display panel, wherein the audio device comprises an audio module, a first switch module, a switch control module and a power module; the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential; the first end of the switch control module is connected with the first voltage output end of the power supply module, and the working voltage input end of the audio module is connected with the first voltage output end of the power supply module; the switch control module is used for switching on the second end and the third end of the first switch module when the working voltage input end of the audio module is connected with a second preset potential so as to adjust the potential of the mute control end of the audio module to the first preset potential and mute the audio module. The application can eliminate the starting noise of the audio device.
Description
Technical Field
The application relates to the technical field of display, in particular to an audio device and a display panel.
Background
The existing audio device comprises a power module, an audio module and a main control module. The power supply module is responsible for supplying power to the main control module, the main control module sends an audio signal to the audio module, and the audio module converts the signal into sound to be output. Specifically, the Power module supplies Power to the main control module through a Power _ SOC network, supplies Power to the AUDIO module through a Power _ AUDIO network, and outputs a 3.3V Power supply to supply Power to the analog circuits of the modules. The Mute Control is a Control signal given by the main Control module, the AMP _ Mute is a Mute setting signal of the audio module, and when the AMP _ Mute is at a high level (3.3V), the audio module can normally output sound; when AMP _ Mute is low (0V), the audio module is muted and no sound is heard. However, in the moment when the existing audio module is connected to the working voltage, the power supply voltage of the existing audio module will change dramatically, which causes the audio module to generate noise and affects the sound quality.
That is, in the prior art, the audio module generates noise at the moment of starting the audio device.
Disclosure of Invention
The embodiment of the application provides an audio device and a display panel, which can eliminate noise generated by an audio module at the moment of starting the audio device.
In order to solve the above problem, in a first aspect, the present application provides an audio device, where the audio device includes an audio module, a first switch module, a switch control module, and a power module;
the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential;
the first end of the switch control module is connected with the first voltage output end of the power supply module, and the working voltage input end of the audio module is connected with the first voltage output end of the power supply module;
the switch control module is used for enabling the second end and the third end of the first switch module to be conducted when the working voltage input end of the audio module is connected with a second preset potential, so that the potential of the mute control end of the audio module is adjusted to the first preset potential, and the audio module is muted.
Wherein the switch control module comprises a second switch module, a first voltage delay unit and a second voltage delay unit,
the first end of the first voltage delay unit and the first end of the second voltage delay unit are connected with the first voltage output end of the power supply module and used for accessing the second preset potential, the second end of the first voltage delay unit is connected with the first end of the second switch module, the second end of the second voltage delay unit is connected with the second end of the second switch module, and the third end of the second switch module is connected with the first end of the first switch module;
the charging rate of the first voltage delay unit is different from that of the second voltage delay unit, when the first ends of the first voltage delay unit and the second voltage delay unit are instantly connected to the second preset potential, the second end and the third end of the second switch module are conducted, and the second end and the third end of the first switch module are conducted.
Wherein the second switch module is a PNP type triode, the first end of the second switch module is a base electrode, the second end of the second switch module is an emitter electrode, the third end of the second switch module is a collector electrode, the second preset potential is higher than the first preset potential,
the first voltage delay unit comprises a first resistor and a first capacitor, the first end of the first capacitor is connected with the first end of the first resistor, the second end of the first resistor is connected with the first voltage output end of the power supply module and used for accessing the second preset potential, the second end of the first capacitor is grounded, the first end of the second switch module is connected with the first end of the first capacitor,
the second voltage delay unit comprises a second resistor and a second capacitor, the first end of the second capacitor is connected with the first end of the second resistor, the second end of the second capacitor is grounded, the second end of the second resistor is connected with the first voltage output end of the power module to be connected with the second preset potential, and the second end of the second resistor is connected with the second end of the second switch module.
The switch control module further comprises a third resistor and a fourth resistor, the first end of the second switch module is connected with the first end of the first capacitor through the third resistor, the first end of the fourth resistor is connected with the first end of the second capacitor, and the second end of the fourth resistor is connected with the second end of the second capacitor.
The switch control module further comprises a first diode, the anode of the first diode is connected with the first end of the first capacitor, and the cathode of the first diode is connected with the second end of the second resistor.
The switch control module further comprises a second diode, the cathode of the first diode is connected with the second end of the second resistor through the second diode, the first voltage output end of the power module is connected with the second end of the second resistor through the second diode, the anode of the second diode is respectively connected with the cathode of the first diode and the first voltage output end of the power module, and the cathode of the second diode is connected with the second end of the second resistor.
And the capacitance value of the first capacitor is smaller than that of the second capacitor.
The switch control module further comprises a fifth resistor and a sixth resistor, the third end of the second switch module is connected with the first end of the first switch module through the fifth resistor, and the third end of the second switch module is connected with the third end of the first switch module through the sixth resistor.
The audio device comprises a seventh resistor, one end of the seventh resistor is connected with the second voltage output end of the power module to be connected with a third preset potential, the other end of the seventh resistor is connected with the mute control end of the audio module, the third preset potential is higher than the first preset potential, and the second preset potential is higher than the first preset potential.
In order to solve the above problem, in a second aspect, the present application provides a display panel including the audio device of any one of the above.
The beneficial effect of this application is: the application provides an audio device, which comprises an audio module, a first switch module and a switch control module; the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential; the switch control module is used for switching on the second end and the third end of the first switch module when the working voltage input end of the audio module is connected with a second preset potential so as to adjust the potential of the mute control end of the audio module to the first preset potential. The audio device is provided with the switch control module and the first switch module, and the switch control module controls the first switch module to open and close so as to adjust the potential of the mute control end of the audio module to the first preset potential when the working voltage input end of the audio module is connected with the second preset potential, thereby eliminating the starting noise of the audio device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an audio apparatus according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an embodiment of the audio apparatus of fig. 1.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides an audio device, which comprises an audio module, a first switch module, a switch control module and a power module; the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential; the first end of the switch control module is connected with the first voltage output end of the power supply module, and the working voltage input end of the audio module is connected with the first voltage output end of the power supply module; the switch control module is used for switching on the second end and the third end of the first switch module when the working voltage input end of the audio module is connected with a second preset potential so as to adjust the potential of the mute control end of the audio module to the first preset potential and mute the audio module. The audio device of the embodiment of the application can be applied to a display panel. The following are detailed below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an audio device according to the present application.
In this embodiment, the audio device 10 includes an audio module 13, a first switch module 12, a switch control module 11, and a power module 14. The first end of the first switch module 12 is connected to the switch control module 11, the second end of the first switch module 12 is connected to the mute control end of the audio module 13, and the third end of the first switch module 12 is connected to the first preset potential V1. The first end of the switch control module 11 is connected to the first voltage output end of the power module 14, and the working voltage input end of the audio module 13 is connected to the first voltage output end of the power module 14. The switch control module 11 is configured to switch on the second terminal and the third terminal of the first switch module 12 when the working voltage input terminal of the audio module 13 is connected to the second preset potential V2, so as to adjust the potential of the mute control terminal of the audio module 13 to the first preset potential V1, so as to mute the audio module 13. The first switch module 12 and the switch control module 11 are used for adjusting the electric potential of the mute control end of the audio module 13, so that the power-on noise of the audio device 10 is eliminated.
It should be noted that the audio module 13 includes a mute control end and a working voltage input end, the mute control end is connected to the potential of the mute control end, and the audio output of the audio module 13 is adjusted according to the difference of the potential of the mute control end. For example, when the voltage of the mute control terminal is switched to 3.0V to 3.6V, the audio module 13 outputs sound normally, and when the voltage of the audio control terminal is switched to 0V to 0.7V, the audio module 13 mutes. The working voltage input terminal is used for accessing a second preset potential V2 when the audio apparatus 10 is powered on, so as to supply power to the audio module 13.
In a preferred embodiment, the first predetermined voltage V1 is ground, and when the voltage level of the mute control terminal of the audio module 13 is adjusted to the first predetermined voltage V1, the audio module 13 is in the mute mode. The first predetermined potential V1 is ground potential, which can adjust the audio module 13 to a mute mode, thereby completely eliminating the power-on noise of the audio apparatus 10. In other embodiments, the first preset potential V1 may be set according to specific situations, which is not limited in the present application.
In this embodiment, the switch control module 11 includes a second switch module 113, a first voltage delay unit 111, and a second voltage delay unit 112. The first end of the first voltage delay unit 111 and the first end of the second voltage delay unit 112 are connected to the first voltage output end of the power module 14, and are connected to the second preset potential V2. The second terminal of the first voltage delay unit 111 is connected to the first terminal of the second switch module 113, the second terminal of the second voltage delay unit 112 is connected to the second terminal of the second switch module 113, and the third terminal of the second switch module 113 is connected to the first terminal of the first switch module 12. The charging rate of the first voltage delay unit 111 is different from the charging rate of the second voltage delay unit 112, when the first terminals of the first voltage delay unit 111 and the second voltage delay unit 112 are momentarily connected to the second preset voltage V2, the second terminal and the third terminal of the second switch module 113 are conducted, and the second terminal and the third terminal of the first switch module 12 are conducted.
In this embodiment, when the audio apparatus 10 is turned on, the first terminal of the first voltage delay unit 111, the first terminal of the second voltage delay unit 112, and the working voltage input terminal of the audio module 13 are simultaneously connected to the second preset voltage V2. In other embodiments, the voltages applied to the first end of the first voltage delay unit 111 and the first end of the second voltage delay unit 112 may not be the same as the voltage applied to the working voltage input terminal of the audio module 13, which is not limited in this application.
When the audio apparatus 10 is turned on, the first terminals of the first voltage delay unit 111 and the second voltage delay unit 112 are momentarily connected to the second predetermined voltage V2. The charging rates of the first voltage delay unit 111 and the second voltage delay unit 112 are different, which causes the potentials of the first terminal and the second terminal of the second switch module 113 to be different, so as to turn on the second switch module 113, and further turn on the second terminal and the third terminal of the first switch module 12, thereby adjusting the potential of the mute control terminal of the audio module 13 to the first preset potential V1.
Different from the prior art, the application provides an audio device and a display panel, wherein the audio device comprises an audio module, a first switch module, a switch control module and a power module; the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential; the first end of the switch control module is connected with the first voltage output end of the power supply module, and the working voltage input end of the audio module is connected with the first voltage output end of the power supply module; the switch control module is used for switching on the second end and the third end of the first switch module when the working voltage input end of the audio module is connected with a second preset potential so as to adjust the potential of the mute control end of the audio module to the first preset potential and mute the audio module. The audio device is provided with the switch control module and the first switch module, and the switch control module controls the first switch module to open and close so as to adjust the potential of the mute control end of the audio module to the first preset potential when the working voltage input end of the audio module is connected with the second preset potential, thereby eliminating the starting noise of the audio device.
To describe the structure of the audio device 10 of the present application in detail, please refer to fig. 2, in which fig. 2 is a schematic structural diagram of an embodiment of the audio device of fig. 1.
In this embodiment, the first voltage delay unit 111 includes a first resistor R1 and a first capacitor C1 connected in sequence. The first end of the first capacitor C1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the second predetermined potential V2, and the second end of the first capacitor C1 is grounded. The switch control module 11 includes a third resistor R3, and a first terminal of the second switch module 113 is connected to a first terminal of a first capacitor C1 through a third resistor R3.
The second voltage delay unit 112 includes a second resistor R2 and a second capacitor C2, which are sequentially connected, a first end of the second capacitor C2 is connected to a first end of the second resistor R2, a second end of the second capacitor C2 is grounded, a second end of the second resistor R2 is used for accessing a second preset potential V2, and a second end of the second resistor R2 is connected to a second end of the second switch module 113.
The second switch module 113 is a PNP triode, the first end of the second switch module 113 is a base, the second end of the second switch module 113 is an emitter, and the third end of the second switch module 113 is a collector. The second predetermined potential V2 is higher than the first predetermined potential V1. Specifically, the first predetermined potential V1 is a ground potential, i.e., the second terminal of the second switch module 113 is grounded.
The resistance value of the first resistor R1 is larger than that of the second resistor R2. In a preferred embodiment, the first resistor R1 has a resistance of one million ohms and the second resistor R2 has a resistance of 1000 ohms.
In this embodiment, the first switch module 12 is an NPN type triode, a first end of the first switch module 12 is a base, a second end of the first switch module 12 is a collector, and a third end of the first switch module 12 is an emitter. The switch control module 11 includes a fifth resistor R5, and the third terminal of the second switch module 113 is connected to the first terminal of the first switch module 12 through a fifth resistor R5. In a preferred embodiment, the fifth resistor R5 has a resistance of ten thousand ohms. In other embodiments, other types of triode can be used according to different modules, which is not limited in this application.
When the audio apparatus 10 is turned on, the first voltage delay unit 111 and the second voltage delay unit 112 are momentarily connected to the second predetermined voltage level V2, and the first capacitor C1 and the second capacitor C2 start to be charged simultaneously. Since the resistance of the first resistor R1 is greater than the resistance of the second resistor R2, the charging rate of the first capacitor C1 is lower than the charging rate of the second capacitor C2. During the charging process, the potential of the second capacitor C2 is higher than the potential of the first capacitor C1, so that the potential of the second terminal of the second switch module 113 is higher than the first terminal of the second switch module 113, and the second switch module 113 is turned on. After the second switch module 113 is turned on, the potential of the first terminal of the first switch module 12 is raised, the third terminal of the first switch module 12 is grounded, and the first switch module 12 is turned on. After the second switch module 113 is turned on, the mute control terminal of the audio module 13 is grounded, and then enters a mute mode, so that the noise generated when the audio apparatus 10 is turned on can be eliminated.
In this embodiment, the audio device 10 includes a seventh resistor R7, one end of the seventh resistor R7 is connected to the second voltage output end of the power module 14 to be connected to the third preset potential V3, the other end of the seventh resistor R7 is connected to the mute control end of the audio module 13, the first preset potential V1 is the ground potential, the third preset potential V3 is higher than the first preset potential V1, and the second preset potential V2 is higher than the first preset potential V1. In a preferred embodiment, the seventh resistor R7 has a value of 4700 ohms.
After the first capacitor C1 and the second capacitor C2 are charged, the potentials of the first capacitor C1 and the second capacitor C2 are both close to the second preset potential V2, and the second switch module 113 is turned off. When the second switch module 113 is turned off, the potential of the first terminal of the first switch module 12 decreases, and the first switch module 12 is also turned off. After the first switch module 12 is turned off, the mute control terminal of the audio module 13 is no longer grounded, and is connected to the third preset potential V3, so that the audio module 13 works normally.
In this embodiment, the switch control module 11 includes a sixth resistor R6, and the third terminal of the second switch module 113 is connected to the third terminal of the first switch module 12 through a sixth resistor R6. Since the third terminal of the first switch module 12 is grounded, that is, the third terminal of the second switch module 113 is grounded through the sixth resistor R6, the function of stabilizing the collector of the first switch module 12 can be performed. In a preferred embodiment, the sixth resistor R6 has a resistance of one hundred thousand ohms.
In this embodiment, the switch control module 11 includes a fourth resistor R4, a first end of the fourth resistor R4 is connected to a first end of the second capacitor C2, and a second end of the fourth resistor R4 is connected to a second end of the second capacitor C2. That is, after the second capacitor C2 is charged, the fourth resistor R4 discharges to be recharged when the audio device 10 is turned on next time to eliminate the turn-on noise of the audio device 10. In a preferred embodiment, the fourth resistor R4 has a resistance of ten thousand ohms.
In this embodiment, the switch control module 11 includes a first diode D1, a positive electrode of the first diode D1 is connected to the first end of the first capacitor C1, and a negative electrode of the first diode D1 is connected to the second end of the second resistor R2. The first diode D1 is capable of unidirectionally conducting the first end of the first capacitor C1 and the second end of the second resistor R2, so that the first capacitor C1 discharges through the first diode D1, the second resistor R2 and the fourth resistor R4. Meanwhile, the first diode D1 is provided to prevent the second capacitor C2 from discharging to the first capacitor C1 through the first end of the second resistor R2.
Further, the switch control module 11 includes a second diode D2, a cathode of the first diode D1 is connected to the second terminal of the second resistor R2 through a second diode D2, and the first voltage output terminal 14 of the power supply module is connected to the second terminal of the second resistor R2 through a second diode D2. The anode of the second diode D2 is connected to the cathode of the first diode D1 and the first voltage output terminal of the power module 14. The anode of the second diode D2 is connected to the cathode of the first diode D1 and is connected to the second predetermined potential V2. A cathode of the second diode D2, a second terminal of the second resistor R2, and a second terminal of the second switch module 113 are connected. The second diode D2 can also prevent the second capacitor C2 from discharging to the first capacitor C1 through the second end of the second resistor R2.
In this embodiment, the capacitance of the first capacitor C1 is smaller than the capacitance of the second capacitor C2. The capacitance value of the first capacitor C1 is smaller than that of the second capacitor C2, and the discharge rate of the first capacitor C1 is higher than that of the second capacitor C2. In a preferred embodiment, the capacitance of the first capacitor C1 is 1 microfarad and the capacitance of the second capacitor C2 is 22 microfarads.
When the audio apparatus 10 is turned off, the first voltage delay unit 111 and the second voltage delay unit 112 are no longer connected to the second preset potential V2, and the first capacitor C1 and the second capacitor C2 start to discharge simultaneously. During the discharging process, the potential of the second capacitor C2 is higher than the potential of the first capacitor C1, so that the potential of the second terminal of the second switch module 113 is higher than the first terminal of the second switch module 113, and the second switch module 113 is turned on. After the second switch module 113 is turned on, the potential of the first terminal of the first switch module 12 is raised, the third terminal of the first switch module 12 is grounded, and the first switch module 12 is turned on. After the second switch module 113 is turned on, the mute control terminal of the audio module 13 is grounded, and then enters a mute mode, so that the noise generated when the audio apparatus 10 is turned off can be eliminated.
Different from the prior art, the application provides an audio device and a display panel, wherein the audio device comprises an audio module, a first switch module, a switch control module and a power module; the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential; the first end of the switch control module is connected with the first voltage output end of the power supply module, and the working voltage input end of the audio module is connected with the first voltage output end of the power supply module; the switch control module is used for switching on the second end and the third end of the first switch module when the working voltage input end of the audio module is connected with a second preset potential so as to adjust the potential of the mute control end of the audio module to the first preset potential and mute the audio module. The audio device is provided with the switch control module and the first switch module, and the switch control module controls the first switch module to open and close so as to adjust the potential of the mute control end of the audio module to the first preset potential when the working voltage input end of the audio module is connected with the second preset potential, thereby eliminating the starting noise of the audio device.
In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.
The foregoing detailed description is directed to an audio device and a display panel provided by an embodiment of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The audio device is characterized by comprising an audio module, a first switch module, a switch control module and a power supply module;
the first end of the first switch module is connected with the switch control module, the second end of the first switch module is connected with the mute control end of the audio module, and the third end of the first switch module is connected with a first preset potential;
the first end of the switch control module is connected with the first voltage output end of the power supply module, and the working voltage input end of the audio module is connected with the first voltage output end of the power supply module;
the switch control module is used for enabling the second end and the third end of the first switch module to be conducted when the working voltage input end of the audio module is connected with a second preset potential, so that the potential of the mute control end of the audio module is adjusted to the first preset potential, and the audio module is muted.
2. The audio device of claim 1, wherein the switch control module comprises a second switch module, a first voltage delay unit, and a second voltage delay unit,
the first end of the first voltage delay unit and the first end of the second voltage delay unit are connected with the first voltage output end of the power supply module and used for accessing the second preset potential, the second end of the first voltage delay unit is connected with the first end of the second switch module, the second end of the second voltage delay unit is connected with the second end of the second switch module, and the third end of the second switch module is connected with the first end of the first switch module;
the charging rate of the first voltage delay unit is different from that of the second voltage delay unit, when the first ends of the first voltage delay unit and the second voltage delay unit are instantly connected to the second preset potential, the second end and the third end of the second switch module are conducted, and the second end and the third end of the first switch module are conducted.
3. The audio apparatus according to claim 2, wherein the second switch module is a PNP type triode, the first terminal of the second switch module is a base, the second terminal of the second switch module is an emitter, the third terminal of the second switch module is a collector, the second predetermined potential is higher than the first predetermined potential,
the first voltage delay unit comprises a first resistor and a first capacitor, the first end of the first capacitor is connected with the first end of the first resistor, the second end of the first resistor is connected with the first voltage output end of the power supply module and used for accessing the second preset potential, the second end of the first capacitor is grounded, the first end of the second switch module is connected with the first end of the first capacitor,
the second voltage delay unit comprises a second resistor and a second capacitor, the first end of the second capacitor is connected with the first end of the second resistor, the second end of the second capacitor is grounded, the second end of the second resistor is connected with the first voltage output end of the power module to be connected with the second preset potential, and the second end of the second resistor is connected with the second end of the second switch module.
4. The audio device according to claim 3, wherein the switch control module further comprises a third resistor and a fourth resistor, the first terminal of the second switch module is connected to the first terminal of the first capacitor through the third resistor, the first terminal of the fourth resistor is connected to the first terminal of the second capacitor, and the second terminal of the fourth resistor is connected to the second terminal of the second capacitor.
5. The audio device according to claim 4, wherein the switch control module further comprises a first diode, an anode of the first diode is connected to the first terminal of the first capacitor, and a cathode of the first diode is connected to the second terminal of the second resistor.
6. The audio device according to claim 5, wherein the switch control module further comprises a second diode, a cathode of the first diode is connected to a second terminal of the second resistor through the second diode, the first voltage output terminal of the power supply module is connected to the second terminal of the second resistor through the second diode, an anode of the second diode is connected to a cathode of the first diode and the first voltage output terminal of the power supply module, respectively, and a cathode of the second diode is connected to the second terminal of the second resistor.
7. The audio device according to claim 6, wherein a capacitance value of the first capacitor is smaller than a capacitance value of the second capacitor.
8. The audio device according to claim 3, wherein the switch control module further comprises a fifth resistor and a sixth resistor, the third terminal of the second switch module is connected to the first terminal of the first switch module through the fifth resistor, and the third terminal of the second switch module is connected to the third terminal of the first switch module through the sixth resistor.
9. The audio device according to any one of claims 2 to 8, wherein the audio device includes a seventh resistor, one end of the seventh resistor is connected to the second voltage output terminal of the power module to connect to a third preset potential, the other end of the seventh resistor is connected to the mute control terminal of the audio module, the third preset potential is higher than the first preset potential, and the second preset potential is higher than the first preset potential.
10. A display panel characterized in that it comprises an audio device according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898664.7A CN110662136A (en) | 2019-09-23 | 2019-09-23 | Audio device and display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898664.7A CN110662136A (en) | 2019-09-23 | 2019-09-23 | Audio device and display panel |
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| CN110662136A true CN110662136A (en) | 2020-01-07 |
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| CN201238284Y (en) * | 2008-08-01 | 2009-05-13 | 青岛海信宽带多媒体技术股份有限公司 | Power-on/off mute circuit and set-top box with the same |
| CN204009463U (en) * | 2014-08-12 | 2014-12-10 | 北京华录天维科技有限公司 | A kind of power on and power off muffling circuit |
| CN107396243A (en) * | 2017-08-10 | 2017-11-24 | 惠州Tcl移动通信有限公司 | A kind of switching on and shutting down muting control circuit, control method and audio frequency apparatus |
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2019
- 2019-09-23 CN CN201910898664.7A patent/CN110662136A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201238284Y (en) * | 2008-08-01 | 2009-05-13 | 青岛海信宽带多媒体技术股份有限公司 | Power-on/off mute circuit and set-top box with the same |
| CN204009463U (en) * | 2014-08-12 | 2014-12-10 | 北京华录天维科技有限公司 | A kind of power on and power off muffling circuit |
| CN107396243A (en) * | 2017-08-10 | 2017-11-24 | 惠州Tcl移动通信有限公司 | A kind of switching on and shutting down muting control circuit, control method and audio frequency apparatus |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Applicant before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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