CN216774909U - Projector with power amplification function - Google Patents
Projector with power amplification function Download PDFInfo
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- CN216774909U CN216774909U CN202220518759.9U CN202220518759U CN216774909U CN 216774909 U CN216774909 U CN 216774909U CN 202220518759 U CN202220518759 U CN 202220518759U CN 216774909 U CN216774909 U CN 216774909U
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Abstract
The utility model relates to a take projecting apparatus of power amplifier function, it includes the projecting apparatus body, this internal power amplifier module that is provided with of projecting apparatus, host system and speaker device, the projecting apparatus body is used for receiving the video audio signal of video source output, the host system electricity is connected in the projecting apparatus in order to receive video audio signal, power amplifier module coupling is in host system in order to receive digital audio signal, power amplifier module is used for carrying out the amplification to analog audio signal and forms and amplify analog audio signal, speaker device electricity is connected in power amplifier module in order to receive analog audio signal, when speaker device input analog audio signal, speaker device circular telegram broadcast sound. This application makes the projecting apparatus have the power amplifier function, makes the projecting apparatus when playing audio-visual video, can realize the sound broadcast, has the functional effect that increases the projecting apparatus.
Description
Technical Field
The application relates to the technical field of projectors, in particular to a projector with a power amplification function.
Background
With the development of the times, the application of electronic instruments is more and more extensive, in daily life, a projector is an electronic instrument which is often used by people, the projector is a device which projects or reflects images or videos to a screen through digital light processing in time or an LCD liquid crystal imaging technology, and can be connected with different signal sources such as a computer, a VCD, a DVD, a BD, a game machine and a DV lamp through different interfaces to input corresponding images and video signals to perform screen projection and play.
Present projecting apparatus does not itself embed to have power amplifier audio equipment, the projecting apparatus is regardless of being applied to any scene, all need be connected projecting apparatus and computer end or data section, when carrying out the sound broadcast, basically all be audio frequency or other audio equipment with the help of the computer end, make the functional of projecting apparatus seem more single, power amplifier audio equipment has the function of broadcast audio frequency, when the user is using the projecting apparatus, still need to purchase power amplifier audio equipment in addition and carry out the sound broadcast, cause the connection and the matching of projecting apparatus and power amplifier stereo set multi-device easily, inconvenient use experience has been brought for the user. Therefore, there is a certain room for improvement.
SUMMERY OF THE UTILITY MODEL
In order to make the projecting apparatus have the power amplifier function, make the projecting apparatus when playing audio-visual video, can realize the sound broadcast, increase the functional of projecting apparatus, this application provides a projecting apparatus of taking the power amplifier function.
The application provides a take projecting apparatus of power amplifier function adopts following technical scheme:
the utility model provides a take projecting apparatus of power amplifier function, includes the projecting apparatus body, this internal power amplifier module, host system and the speaker device of being provided with of projecting apparatus, the projecting apparatus body is used for receiving the video audio signal of video source output, the host system electricity is connected in the projecting apparatus in order to receive video audio signal, power amplifier module coupling is in host system in order to receive digital audio signal, power amplifier module is used for carrying out the amplification processing to analog audio signal and forms and enlargies analog audio signal, the speaker device electricity is connected in power amplifier module in order to receive analog audio signal, works as when speaker device input analog audio signal, speaker device circular telegram broadcast sound.
Through adopting above-mentioned technical scheme, through inside power amplification module and the speaker device of increasing of projecting apparatus body, make the projecting apparatus increase power amplifier function and sound broadcast function, video source output video audio signal to projecting apparatus body, the projecting apparatus body carries out the projection broadcast to the video, transmit video audio signal to host system simultaneously, host system converts audio signal conversion and processes formation digital audio signal transmission to power amplifier module, power amplifier module carries out conversion amplification to digital audio signal and processes formation analog audio signal, and output to speaker device, when speaker device received analog audio signal, speaker device broadcast video audio frequency, realize projecting apparatus sound broadcast function, improve the functionality of projecting apparatus.
Optionally, a heat dissipation device is further installed inside the projector body, the heat dissipation device is coupled with a temperature detection circuit for controlling the start of the heat dissipation device, the temperature detection circuit includes a temperature detection module, a temperature comparison module and a switch module, the temperature detection module is used for detecting the temperature condition inside the projector body and outputting a temperature detection signal when the projector body works, the temperature comparison module is provided with a temperature signal threshold, the temperature comparison module is coupled with the temperature detection module to receive the temperature detection signal, when the temperature detection signal is greater than the temperature signal threshold, the temperature comparison module outputs a temperature comparison signal, the temperature comparison module is coupled with the main control module to output the temperature comparison signal to the main control module, the switch module is coupled with the main control module to receive the start switch signal and output a start signal, the switch module is electrically connected to a power supply loop of the heat dissipation device, and when the heat dissipation device receives a starting signal, the heat dissipation device is powered on and started.
By adopting the technical scheme, when the projector is used, the projector body can generate a large amount of heat along with the increase of the working time, the temperature detection module monitors the working temperature in the projector body in real time and outputs a temperature detection signal, when the temperature in the projector body rises, the temperature detection signal increases, when the temperature detection signal is greater than the temperature signal threshold value, the temperature comparison module outputs a temperature comparison signal to the main control module, the main control module receives the temperature comparison signal and then outputs a starting switch signal to the switch module, when the switch module receives the starting switch signal, the switch module outputs a switch signal to a power supply loop of the heat dissipation device, when the heat dissipation device receives the switch signal, the heat dissipation device is electrified and started, and when the projector works, the internal temperature of the projector body is prevented from being overhigh and the projector body is protected from being burnt out, the service life of the projector is prolonged, and the practicability of the projector is improved.
Optionally, the temperature detection module includes a thermistor RTC and a first resistor R1, the thermistor RTC is installed inside the projector body, the thermistor RTC is connected in series with the first resistor R1, the other end of the thermistor RTC is grounded, the other end of the first resistor R1 is coupled to the power supply voltage, and the connection node between the thermistor RTC and the first resistor R1 is coupled to the temperature comparison module.
By adopting the technical scheme, the thermistor RTC monitors the temperature condition in the projector body in real time and outputs a temperature detection signal, when the temperature in the projector body rises, the resistance value of the thermistor RTC increases, the voltage at two ends of the thermistor RTC increases, and the temperature detection signal increases; when the temperature in the projector body drops, the resistance value of the thermistor RTC is reduced, the voltages at two ends of the thermistor RTC are reduced, the temperature detection signal is reduced, and the function of detecting the temperature in the projector body is realized.
Optionally, the temperature comparison module includes a comparator N1, a first input end of the comparator N1 is coupled to a connection node between the thermistor RTC and the first resistor R1, a second input end of the comparator N1 is sequentially connected in series to a second resistor R2 and a third resistor R3, the other end of the third resistor R3 is coupled to the threshold voltage, a connection node between the second resistor R2 and the third resistor R3 is coupled to a fourth resistor R4, the other end of the fourth resistor R4 is grounded, and an output end of the comparator N1 is coupled to the main control module.
By adopting the technical scheme, the first input end of the comparator N1 receives voltages at two ends of the thermistor RTC, the second input end of the comparator N1 receives a threshold voltage, when the temperature in the projector body rises, the voltages at two ends of the thermistor RTC increase, the voltage received by the first input end of the comparator N1 increases, the input voltage at the first input end of the comparator N1 is greater than the threshold voltage at the second input end of the comparator N1, the output end of the comparator N1 outputs a high level, and the temperature comparison module outputs a temperature comparison signal to the main control module; when the temperature in the projector body is reduced, the voltage input by the first input end of the comparator N1 is reduced and is smaller than the threshold voltage input by the second input end of the comparator N1, the output end of the comparator N1 outputs a low level, and the temperature comparison module does not output a temperature comparison signal, so that the temperature comparison function in the projector body is realized.
Optionally, the switch module includes a transistor Q, a base of the transistor Q is coupled to the main control module, a collector of the transistor Q is coupled to the power voltage, and an emitter of the transistor Q is grounded.
By adopting the technical scheme, when the triode Q receives the starting switch signal output by the main control module, the base electrode of the triode Q inputs high level, the triode Q is in a conducting state, and the starting signal is output to the power supply loop of the heat dissipation device, so that the heat dissipation device is powered on and started.
Optionally, the switch module further includes a relay KM1, a coil of the relay KM1 is connected in series with a collector of the triode Q, the relay KM1 includes a normally open contact switch KM1-1, and the normally open contact switch KM1-1 is connected in series with a power supply loop of the heat dissipation device.
By adopting the technical scheme, when the triode Q is conducted, the coil of the relay KM1 is electrified, the normally open contact switch KM1-1 is electrified to be in a closed state, the power supply loop of the heat dissipation device is conducted, the heat dissipation device is electrified and started, and the function of controlling the start of the heat dissipation device is realized.
Optionally, a plurality of heat dissipation holes are formed in two opposite sides of the outer surface of the projector body and are uniformly distributed.
By adopting the technical scheme, the heat dissipation function of the projector is further improved by additionally arranging the heat dissipation holes on the outer surface of the projector body, and the projector body is further protected from being damaged by overhigh temperature.
Optionally, a button module is disposed on a top panel of the projector body, the button module is electrically connected to the main control module, the button module includes a plurality of function buttons, when a user operates the function buttons, the button module outputs a button signal to the main control module, and the main control module outputs a control instruction to the power amplifier module according to the button signal.
By adopting the technical scheme, the key module is arranged, so that a user can conveniently control a plurality of function keys on the key module, when the user operates the function keys, the key module generates key signals and outputs the key signals to the main control module, and the main control module generates control instructions according to the key signals and outputs the control instructions to the power amplifier module, so that the function of adjusting the sound playing volume through keys is realized.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the power amplification module and the loudspeaker device in the projector body, the projector body performs projection playing on videos and transmits audio signals of the videos to the main control module, the main control module converts and processes the audio signals to form digital audio signals and transmits the digital audio signals to the power amplification module, the power amplification module converts and amplifies the digital audio signals to form analog audio signals and outputs the analog audio signals to the loudspeaker device, and when the loudspeaker device receives the analog audio signals, the loudspeaker device plays audio of the videos, so that the sound playing function of the projector is realized, and the functionality of the projector is improved;
2. by arranging the heat dissipation device and the heat dissipation holes, the internal temperature of the projector body is prevented from being too high when the projector works, the projector body is protected from being burnt out, the service life of the projector is prolonged, and the practicability of the projector is improved;
3. through being provided with the key module, be convenient for the user to control a plurality of function button on the key module, realize the button and adjust sound broadcast volume function
Drawings
Fig. 1 is a structural diagram of a projector with a power amplifier function according to an embodiment of the present application.
Fig. 2 is a circuit block diagram of a projector with a power amplifier function according to an embodiment of the present application.
Fig. 3 is a circuit diagram of a temperature detection circuit of a projector with a power amplification function according to an embodiment of the present application.
Description of reference numerals: 1. a projector body; 11. heat dissipation holes; 2. a main control module; 3. a power amplifier module; 4. a speaker device; 5. a temperature detection module; 6. a temperature comparison module; 7. a switch module; 8. a key module; 81. function keys.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a projector with a power amplification function.
Referring to fig. 1 and 2, a take projecting apparatus of power amplifier function includes projecting apparatus body 1, a plurality of even louvres 11 have been seted up to the relative both sides of the surface of projecting apparatus body 1, the circuit is including power amplifier module 3 in projecting apparatus body 1, host system 2 and speaker device 4, the top panel of projecting apparatus body 1 is provided with button module 8, button module 8 includes a plurality of function button 81, in this embodiment, a plurality of function button 81 include the key of tuning, projecting apparatus adjustment key and on-off switch etc. here does not do the restriction.
The projector main part electricity is connected with the video source and receives video audio signal, when projector body 1 receives video signal, projector body 1 carries out the projection broadcast to the video, video audio signal is exported simultaneously, main control module 2 electricity is connected in projector body 1 in order to receive audio signal, power amplifier module 3 electricity is connected in main control module 2 in order to receive digital audio signal, power amplifier module 3 is used for carrying out the amplification conversion with digital audio signal and handles and output analog audio signal, power amplifier module 3's output electricity is connected with speaker device 4 in order to export analog audio signal to speaker device 4, when speaker device 4 input analog audio signal, speaker device 4 starts work, broadcast video sound. The key module 8 is electrically connected to the main control module 2 to output a key signal to the main control module 2, and the main control module 2 forms a control instruction according to the key signal and outputs the control instruction to the projector body 1 and the power amplifier module 3, respectively.
Referring to fig. 3, a heat sink is further disposed in the projector body 1, and a temperature detection circuit for controlling the start of the heat sink is coupled to the heat sink, and the temperature detection circuit includes a temperature detection module 5, a temperature comparison module 6, and a switch module 7.
The temperature detection module 5 is used for detecting the temperature condition in the projector body 1 and outputting a temperature detection signal, the input end of the temperature comparison module 6 is coupled to the temperature detection module 5 to receive the temperature detection signal, the temperature comparison module 6 is provided with a temperature signal threshold, when the temperature detection signal is greater than the temperature signal threshold, the temperature comparison module 6 outputs a temperature comparison signal, the output end of the temperature comparison module 6 is coupled to the main control module 2 to output the temperature comparison signal to the main control module 2, when the main control module 2 receives the temperature comparison signal, the main control module 2 outputs a start switch signal, the switch module 7 is coupled to the main control module 2 to output a start signal when receiving the start switch signal, and the switch module 7 is further connected in series in a power supply loop of the heat dissipation device to output the start signal to the heat dissipation device.
The temperature detecting module 5 includes a thermistor RTC and a first resistor R1, the thermistor RTC is connected in series with the first resistor R1, the other end of the thermistor RTC is grounded, the other end of the first resistor R1 is coupled to the power voltage, and a connection node between the thermistor RTC and the first resistor R1 is coupled to the temperature comparing module 6.
The temperature comparison module 6 includes a comparator N1, a second resistor R2, a third resistor R3, and a fourth resistor R4. A first input terminal of the comparator N1 is a positive input terminal, a second input terminal of the comparator N1 is an inverted input terminal, the positive input terminal of the comparator N1 is coupled to a connection node between the thermistor RTC and the first resistor R1, the inverted input terminal of the comparator N1 is sequentially connected in series with the second resistor R2 and the third resistor R3, the other end of the third resistor R3 is coupled to a threshold power supply, a connection node between the second resistor R2 and the third resistor R3 is coupled to the fourth resistor R4, the other end of the fourth resistor R4 is grounded, and an output terminal of the comparator N1 is coupled to the main control module 2.
The switch module 7 comprises a triode Q and a relay KM1, the base electrode of the triode Q is coupled to the main control module 2, the collector electrode of the triode Q is coupled to power voltage after being connected with the coil of the relay KM1 in series, the emitter electrode of the triode Q is grounded, the relay KM1 comprises a normally open contact switch KM1-1, and the normally open contact switch KM1-1 is connected in series in a power supply loop of the heat dissipation device.
The implementation principle of the projector with the power amplification function in the embodiment of the application is as follows:
video audio signal is input to projecting apparatus body 1 to the video source, projecting apparatus body 1 receives video signal after, carry out the projection broadcast to the video, and simultaneously, projecting apparatus body 1 exports audio signal to host system 2, host system 2 handles audio signal and forms digital audio signal and exports to power amplifier module 3, power amplifier module 3 carries out power amplifier conversion with digital audio signal and processes and form analog audio signal, power amplifier module 3 exports analog audio signal to speaker device 4, when speaker device 4 receives analog audio signal, speaker device 4 circular telegram work, speaker device 4 plays video sound.
When the user operates the function key 81, the key module 8 generates a key signal and outputs the key signal to the main control module 2, and the main control module 2 generates a control instruction according to the key signal and outputs the control instruction to the projector body 1 and the power amplifier module 3 respectively, thereby adjusting the volume of sound played by the speaker device 4 and adjusting the projection effect of the projector body 1 on the video.
When the projector body 1 works, the heat generated by the projector body 1 increases along with the increase of working time, the temperature in the projector body 1 increases, the temperature detection signal output by the temperature detection module 5 increases, the resistance value of the thermistor RTC increases, the voltages at two ends of the thermistor RTC increase, the positive input end of the comparator N1 inputs a high level, the voltage value input at the positive input end of the comparator N1 is greater than the threshold voltage input at the negative input end of the comparator N1, the temperature detection signal is a large yard temperature signal threshold value, the temperature comparison module 6 outputs a temperature comparison signal, the output end of the comparator N1 outputs a high level, when the main control module 2 receives the temperature comparison signal, the start switch signal is output to the switch module 7, the base electrode of the triode Q inputs a high level, the triode Q is in a conducting state, the coil of the relay KM1 is electrified, the normally open contact KM1-1 is electrified to be in a closed state, a power supply loop of the heat dissipation device is conducted, the heat dissipation device is electrified and started, and the heat dissipation device is matched with the heat dissipation hole 11 to dissipate heat in the projector body 1;
when the temperature in the projector body 1 is reduced, the temperature detection signal is reduced, the resistance value of the thermistor RTC is reduced, the voltages at two ends of the thermistor RTC are reduced, the normal phase input end of the comparator N1 inputs a low level, the voltage input at the normal phase input end of the comparator N1 is smaller than the voltage input at the reverse phase input end, the output end of the comparator N1 outputs a low level, the temperature comparison module 6 does not output a temperature comparison signal, the main control module 2 does not output a start switch signal, the base electrode of the triode Q inputs a low level, the triode Q is in a disconnected state, the coil of the relay KM1 is powered off, the normally open contact switch KM1-1 is powered off and is in a disconnected state, and the heat dissipation device is powered off and stops working, but can continue to dissipate heat from the projector body 1 through the heat dissipation hole 11.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a take projecting apparatus of power amplifier function which characterized in that: including projecting apparatus body (1), be provided with power amplifier module (3), host system (2) and speaker device (4) in projecting apparatus body (1), projecting apparatus body (1) is used for receiving the video audio signal of video source output, host system (2) electricity is connected in the projecting apparatus in order to receive video audio signal, power amplifier module (3) are coupled in host system (2) in order to receive digital audio signal, power amplifier module (3) are used for carrying out the amplification to analog audio signal and form the analog audio signal of enlargiing, speaker device (4) electricity is connected in power amplifier module (3) in order to receive analog audio signal, works as when speaker device (4) input analog audio signal, speaker device (4) circular telegram broadcast sound.
2. The projector with the power amplification function according to claim 1, wherein: the projector comprises a projector body (1), and is characterized in that a heat dissipation device is further installed in the projector body (1), the heat dissipation device is coupled with a temperature detection circuit for controlling the start of the heat dissipation device, the temperature detection circuit comprises a temperature detection module (5), a temperature comparison module (6) and a switch module (7), the temperature detection module (5) is used for detecting the temperature condition in the projector body (1) and outputting a temperature detection signal when the projector body (1) works, the temperature comparison module (6) is provided with a temperature signal threshold value, the temperature comparison module (6) is coupled with the temperature detection module (5) to receive the temperature detection signal, when the temperature detection signal is greater than the temperature signal threshold value, the temperature comparison module (6) outputs a temperature comparison signal, the temperature comparison module (6) is coupled with a main control module (2) to output the temperature comparison signal to the main control module (2), the switch module (7) is coupled to the main control module (2) to output a starting signal when receiving a starting switch signal, the switch module (7) is electrically connected to a power supply loop of the heat dissipation device, and when the heat dissipation device receives the starting signal, the heat dissipation device is powered on and started.
3. The projector with the power amplification function according to claim 2, wherein: the temperature detection module (5) comprises a thermistor RTC and a first resistor R1, the thermistor RTC is installed inside the projector body (1), the thermistor RTC is connected with the first resistor R1 in series, the other end of the thermistor RTC is grounded, the other end of the first resistor R1 is coupled to the power supply voltage, and the connecting node of the thermistor RTC and the first resistor R1 is coupled to the temperature comparison module (6).
4. The projector with the power amplification function according to claim 3, wherein: the temperature comparison module (6) comprises a comparator N1, a first input end of the comparator N1 is coupled to a connection node between the thermistor RTC and a first resistor R1, a second input end of the comparator N1 is sequentially connected in series with a second resistor R2 and a third resistor R3, the other end of the third resistor R3 is coupled to a threshold voltage, a connection node between the second resistor R2 and the third resistor R3 is coupled to a fourth resistor R4, the other end of the fourth resistor R4 is grounded, and an output end of the comparator N1 is coupled to the main control module (2).
5. The projector with the power amplification function according to claim 2, wherein: the switch module (7) comprises a triode Q, the base electrode of the triode Q is coupled to the main control module (2), the collector electrode of the triode Q is coupled to the power voltage, and the emitting electrode of the triode Q is grounded.
6. The projector with the power amplification function according to claim 5, wherein: the switch module (7) further comprises a relay KM1, a coil of the relay KM1 is connected with a collector of the triode Q in series, the relay KM1 comprises a normally open contact switch KM1-1, and the normally open contact switch KM1-1 is connected with a power supply loop of the heat dissipation device in series.
7. The projector with the power amplification function according to claim 1, wherein: a plurality of heat dissipation holes (11) which are uniformly distributed are formed in the two opposite sides of the outer surface of the projector body (1).
8. The projector with the power amplification function according to claim 1, wherein: the top panel of projector body (1) has seted up button module (8), button module (8) electricity is connected in host system (2), button module (8) include a plurality of function button (81), and when the user controlled a plurality of function button (81), button module (8) output key signal to host system (2), host system (2) are according to key signal output control instruction to power amplifier module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220518759.9U CN216774909U (en) | 2022-03-09 | 2022-03-09 | Projector with power amplification function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220518759.9U CN216774909U (en) | 2022-03-09 | 2022-03-09 | Projector with power amplification function |
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| Publication Number | Publication Date |
|---|---|
| CN216774909U true CN216774909U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220518759.9U Active CN216774909U (en) | 2022-03-09 | 2022-03-09 | Projector with power amplification function |
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| Country | Link |
|---|---|
| CN (1) | CN216774909U (en) |
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- 2022-03-09 CN CN202220518759.9U patent/CN216774909U/en active Active
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Effective date of registration: 20230714 Address after: 511547 The third and fourth floors of the third Class C factory building of Western European Corporation, No. 6, Guangtuo Street, Guangzhou (Qingyuan) Industrial Transfer Park, Shijiao Town, Qingcheng District, Qingyuan, Guangdong Province Patentee after: Guangdong Yiheng Technology Co.,Ltd. Address before: 510000 1 of No. 233, Shenshan Avenue West, Zhongba village, Jianggao Town, Baiyun District, Guangzhou City, Guangdong Province (self declaration) Patentee before: GUANGZHOU YIHENG ELECTRONICS CO.,LTD. |
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