CN107371098A - A kind of Baffle Box of Bluetooth control circuit - Google Patents
A kind of Baffle Box of Bluetooth control circuit Download PDFInfo
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- CN107371098A CN107371098A CN201710801683.4A CN201710801683A CN107371098A CN 107371098 A CN107371098 A CN 107371098A CN 201710801683 A CN201710801683 A CN 201710801683A CN 107371098 A CN107371098 A CN 107371098A
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- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 3
- 230000005236 sound signal Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Push-Button Switches (AREA)
Abstract
The invention discloses including a kind of control circuit of Baffle Box of Bluetooth, the circuit includes MCU control circuit, TF card circuit, AUX circuits, on/off circuit, key circuit, indicator light circuit and vibration alarming circuit, and MCU control circuit is connected with TF card circuit, AUX circuits, on/off circuit, key circuit, indicator light circuit and vibration alarming circuit respectively.The signal of TF card can be converted to audio signal and played out by the present invention, and the control circuit can also detect whether Baffle Box of Bluetooth falls by vibration switch, and be alarmed according to vibration detection state, be avoided that phenomena such as audio amplifier is lost in motion process.
Description
Technical field
The present invention relates to Baffle Box of Bluetooth equipment technical field, particularly a kind of Baffle Box of Bluetooth control circuit.
Background technology
As bluetooth module mandate expense significantly declines, Baffle Box of Bluetooth is also no longer the symbol of expensive goods.With people
Baffle Box of Bluetooth convenience is liked, Baffle Box of Bluetooth starts significantly to emerge in large numbers like the tidal wave.But before standard is not yet established, city
All kinds of omnifarious products are always flooded with field, Baffle Box of Bluetooth is also in this way, Baffle Box of Bluetooth on the market disregards it at present
Number, but all ambiguous mostly, most of Baffle Box of Bluetooth receive unstable, easy broken string, and circuit design drawback is obvious etc..
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of Baffle Box of Bluetooth control circuit, control electricity
The signal of TF card can be converted to audio signal and played out by road, and the control circuit can also detect Baffle Box of Bluetooth by vibration switch
Whether fall, and alarmed according to vibration detection state, be avoided that phenomena such as audio amplifier is lost in motion process.
The purpose of the present invention is achieved through the following technical solutions：A kind of control circuit of Baffle Box of Bluetooth, including MCU
Control circuit, TF card circuit, AUX circuits, on/off circuit, key circuit and indicator light circuit；The MCU control circuit includes
Fourth chip, the 19th electric capacity, the 23rd electric capacity, the 24th electric capacity, the 51st electric capacity, the 65th electric capacity, the 6th
16 electric capacity, the 73rd electric capacity, the 80th electric capacity, the 88th electric capacity, the first crystal oscillator, the 13rd resistance, the 16th resistance,
96th resistance, the 97th resistance, the 98th resistance and the 5th triode；40th pin of fourth chip passes through
One crystal oscillator is connected with the 41st pin of fourth chip, and the 40th pin of fourth chip is also connect by the 65th electric capacity
Ground, the 40th pin of fourth chip also draw by the 41st of the 65th electric capacity, the 66th electric capacity and fourth chip the
Pin is connected；42nd pin of fourth chip is connected by the 13rd resistance with BAT signal ends, and the 42nd of fourth chip the
Pin also passes through the 73rd capacity earth by the 16th resistance eutral grounding, the 42nd pin of fourth chip；Fourth chip
The 43rd pin connect by the 51st capacity earth, the 44th pin of fourth chip by the 88th electric capacity
Ground, the 45th pin ground connection of fourth chip, the 48th pin of fourth chip pass through the 24th capacity earth；4th
First pin of chip is grounded by the 19th capacity earth, the second pin of fourth chip by the 23rd pin, and the 4th
The 3rd pin ground connection of chip；25th pin of fourth chip is connected by the 97th resistance with 3V3 signal ends, and the 4th
Colelctor electrode of 25th pin of chip also with the 5th triode is connected, the grounded emitter of the 5th triode, the five or three pole
The base stage of pipe is connected by the 96th resistance with SD signal ends, and the base stage of the 5th triode passes through the 98th resistance eutral grounding；
The TF card circuit includes TF card interface chip, the 18th resistance, the 19th resistance and the 89th electric capacity, TF card interface chip
The 4th end be connected by the 18th resistance with 3V3 signal ends, the 4th end of TF card interface chip is also connect by the 89th electric capacity
Ground, the 5th end of TF card interface chip are connected by the 19th resistance with the 9th end of TF card interface chip；The 3rd of TF card interface chip
End is connected with the 35th pin of fourth chip, the 5th end of TF card interface chip and the 34th pin phase of fourth chip
Even, the 6th end ground connection of TF card interface chip, the 7th end of TF card interface chip is connected with the 36th pin of fourth chip；
The AUX circuits include hard contact end, the 82nd resistance, the 83rd resistance, the 84th resistance, the 49th
Resistance, the 50th resistance, the 71st electric capacity, the 72nd electric capacity, the 94th electric capacity and the 95th electric capacity；Hard contact
The second end ground connection at end, the 3rd end at hard contact end passes sequentially through the 82nd resistance, the 95th electric capacity and fourth chip
The 6th pin be connected, the 3rd end at hard contact end also passes sequentially through the 82nd resistance, the 71st capacity earth, the 7th
The 49th resistance is also parallel with 11 electric capacity, the 4th end at hard contact end passes sequentially through the 83rd resistance, the 90th
Four electric capacity are connected with the 5th pin of fourth chip, and the 4th end at hard contact end also passes sequentially through the 83rd resistance, the 7th
12 capacity earths, the 50th resistance are also parallel with the 72nd electric capacity, the 5th end at hard contact end also passes through the 80th
Four resistance are connected with the 22nd pin of fourth chip；
The on/off circuit includes switch key and the 47th resistance, and the 12nd pin of fourth chip passes through the 47th
Resistance and switch key ground connection；
The key circuit includes the 73rd resistance, the 60th resistance, the 62nd resistance, the 65th resistance, the 70th
Two resistance, the 51st resistance, the 87th resistance, the 48th resistance, the second button, the 3rd button, the 4th button, the 5th
Button, the 6th button, the 7th button and the 8th button；27th pin of fourth chip respectively with the 60th resistance, the 6th
12 resistance, the 65th resistance, the 72nd resistance, the 51st resistance, the 87th resistance and the 48th resistance phase
Even, the 27th pin of fourth chip is also connected by the 73rd resistance with 3V3 signal ends, and the 60th resistance passes through the 6th
Button is grounded, and the 62nd resistance is grounded by the 5th button, and the 65th resistance is grounded by the 4th button, the 72nd electricity
Resistance is grounded by the 3rd button, and the 51st resistance is grounded by the 7th button, and the 87th resistance is grounded by the second button,
48th resistance is grounded by the 8th button；
The indicator light circuit includes the first light emitting diode, the second light emitting diode, the 57th resistance and the 81st electricity
Resistance, the 16th pin of fourth chip are grounded by the 57th resistance and the first light emitting diode, and the 20th of fourth chip the
Eight pins are grounded by the 81st resistance and the second light emitting diode.
Further, present invention additionally comprises vibration alarming circuit to include the 52nd resistance, vibration switch and the 84th
Electric capacity, P17 signal detections end are grounded by the 52nd resistance, vibration switch, and P17 signal detections end also passes through the 52nd electricity
Resistance, the 84th capacity earth.
The beneficial effects of the invention are as follows：
（1）The signal of TF card can be converted into audio signal to play out, there are a variety of play mode；
（2）The control circuit can also detect whether Baffle Box of Bluetooth falls by vibration switch, and be carried out according to vibration detection state
Alarm, is avoided that phenomena such as audio amplifier is lost in motion process；
（3）Circuit is reasonable in design, avoids conventional Bluetooth from receiving unstable, the problems such as easily broken string.
Brief description of the drawings
Fig. 1 is the electrical block diagram of MCU circuits of the present invention；
Fig. 2 is the electrical block diagram of TF card circuit of the present invention；
Fig. 3 is the electrical block diagram of AUX circuits of the present invention；
Fig. 4 is the electrical block diagram of on/off circuit of the present invention；
Fig. 5 is the electrical block diagram of key circuit of the present invention；
Fig. 6 is the electrical block diagram of indicator light circuit of the present invention；
Fig. 7 is the electrical block diagram of vibration alarming circuit of the present invention.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
Embodiment：
A kind of control circuit of Baffle Box of Bluetooth, as shown in figure 1, including MCU control circuit, TF card circuit, AUX circuits, switching on and shutting down
Circuit, key circuit and indicator light circuit；The MCU control circuit includes fourth chip U4, the 19th electric capacity C19, the 20th
Three electric capacity C23, the 24th electric capacity C24, the 51st electric capacity C51, the 65th electric capacity C65, the 66th electric capacity C66,
73 electric capacity C73, the 80th electric capacity C80, the 88th electric capacity C88, the first crystal oscillator Y1, the 13rd resistance R13, the 16th electricity
Hinder R16, the 96th resistance R96, the 97th resistance R97, the 98th resistance R98 and the 5th triode Q5；Fourth chip
U4 the 40th pin is connected by the first crystal oscillator Y1 with fourth chip U4 the 41st pin, and the 40th of fourth chip U4 the
Pin is also grounded by the 65th electric capacity C65, and fourth chip U4 the 40th pin also passes through the 65th electric capacity C65, the
66 electric capacity C66 are connected with fourth chip U4 the 41st pin；Fourth chip U4 the 42nd pin passes through the tenth
Three resistance R13 are connected with BAT signal ends, and fourth chip U4 the 42nd pin is grounded by the 16th resistance R16, the 4th core
Piece U4 the 42nd pin is also grounded by the 73rd electric capacity C73；Fourth chip U4 the 43rd pin passes through the 5th
11 electric capacity C51 are grounded, and fourth chip U4 the 44th pin is grounded by the 88th electric capacity C88, fourth chip U4's
45th pin is grounded, and fourth chip U4 the 48th pin is grounded by the 24th electric capacity C24；Fourth chip U4's
First pin is grounded by the 19th electric capacity C19, and fourth chip U4 second pin is grounded by the 23rd pin, the 4th core
Piece U4 the 3rd pin ground connection；Fourth chip U4 the 25th pin passes through the 97th resistance R97 and 3V3 signal end phases
Even, colelctor electrode of fourth chip U4 the 25th pin also with the 5th triode Q5 is connected, the 5th triode Q5 emitter stage
Ground connection, the 5th triode Q5 base stage are connected by the 96th resistance R96 with SD signal ends, and the 5th triode Q5 base stage is led to
Cross the 98th resistance R98 ground connection；
As shown in Fig. 2 the TF card circuit includes TF card interface chip, the 18th resistance R18, the 19th resistance R19 and the 80th
Nine electric capacity C89, the 4th end of TF card interface chip are connected by the 18th resistance R18 with 3V3 signal ends, and the 4th of TF card interface chip the
End is also grounded by the 89th electric capacity C89, and the 5th end of TF card interface chip passes through the 19th resistance R19 and TF card interface chip
9th end is connected；3rd end of TF card interface chip is connected with fourth chip U4 the 35th pin, and the 5th of TF card interface chip the
End is connected with fourth chip U4 the 34th pin, the 6th end of TF card interface chip ground connection, the 7th end of TF card interface chip and
Fourth chip U4 the 36th pin is connected；
As shown in figure 3, the AUX circuits include hard contact end PJ1, the 82nd resistance R82, the 83rd resistance R83, the
84 resistance R84, the 49th resistance R49, the 50th resistance R50, the 71st electric capacity C71, the 72nd electric capacity C72,
94th electric capacity C94 and the 95th electric capacity C95；Hard contact end PJ1 the second end ground connection, the of hard contact end PJ1
Three ends pass sequentially through the 82nd resistance R82, the 95th electric capacity C95 is connected with fourth chip U4 the 6th pin, and metal touches
Point end PJ1 the 3rd end also passes sequentially through the 82nd resistance R82, the 71st electric capacity C71 ground connection, the 71st electric capacity C71
On be also parallel with the 49th resistance R49, hard contact end PJ1 the 4th end passes sequentially through the 83rd resistance R83, the 90th
Four electric capacity C94 are connected with fourth chip U4 the 5th pin, and hard contact end PJ1 the 4th end also passes sequentially through the 83rd electricity
R83, the 72nd electric capacity C72 ground connection are hindered, the 50th resistance R50, hard contact end are also parallel with the 72nd electric capacity C72
PJ1 the 5th end is also connected by the 84th resistance R84 with fourth chip U4 the 22nd pin；
As shown in figure 4, the on/off circuit includes switch key K1 and the 47th resistance R47, the tenth of fourth chip U4 the
Two pins are grounded by the 47th resistance R47 and switch key K1；
As shown in figure 5, the key circuit include the 73rd resistance R73, the 60th resistance R60, the 62nd resistance R62,
65th resistance R65, the 72nd resistance R72, the 51st resistance R51, the 87th resistance R87, the 48th resistance
R48, the second button K2, the 3rd button K3, the 4th button K4, the 5th button K5, the 6th button K6, the 7th button K7 and the 8th are pressed
Key K8；Fourth chip U4 the 27th pin respectively with the 60th resistance R60, the 62nd resistance R62, the 65th resistance
R65, the 72nd resistance R72, the 51st resistance R51, the 87th resistance R87 and the 48th resistance R48 are connected, and the 4th
Chip U4 the 27th pin is also connected by the 73rd resistance R73 with 3V3 signal ends, and the 60th resistance R60 passes through
Six button K6 are grounded, and the 62nd resistance R62 is grounded by the 5th button K5, and the 65th resistance R65 passes through the 4th button K4
Ground connection, the 72nd resistance R72 are grounded by the 3rd button K3, and the 51st resistance R51 is grounded by the 7th button K7, and the 8th
17 resistance R87 are grounded by the second button K2, and the 48th resistance R48 is grounded by the 8th button R8；In the present invention,
Eight button K8 are alarm key, when pressing alarm key, can carry out buzzing alarm by the button.
As shown in fig. 6, the indicator light circuit includes the first LED 1, the second LED 2, the
57 resistance R57 and the 81st resistance R81, fourth chip U4 the 16th pin pass through the 57th resistance R57 and
One LED 1 is grounded, and fourth chip U4 the 28th pin passes through the 81st resistance R81 and second luminous two
Pole pipe LED2 is grounded.The first LED 1 of the present invention is status indicator lamp, and the second LED 2 is work
Indicator lamp.
Further, as shown in fig. 7, including the 52nd resistance R52 present invention additionally comprises vibration alarming circuit, vibrations are opened
Close SW1 and the 84th electric capacity C84, P17 signal detection end to be grounded by the 52nd resistance R52, vibration switch SW1, P17 letters
Number test side also passes through the 52nd resistance R52, the 84th electric capacity C84 ground connection.
Embodiment described above only expresses the embodiment of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.
Claims (2)
1. a kind of control circuit of Baffle Box of Bluetooth, it is characterised in that including MCU control circuit, TF card circuit, AUX circuits, switch
Electromechanical road, key circuit and indicator light circuit；The MCU control circuit includes fourth chip, the 19th electric capacity, the 23rd electricity
Appearance, the 24th electric capacity, the 51st electric capacity, the 65th electric capacity, the 66th electric capacity, the 73rd electric capacity, the 80th electricity
Appearance, the 88th electric capacity, the first crystal oscillator, the 13rd resistance, the 16th resistance, the 96th resistance, the 97th resistance, the 9th
18 resistance and the 5th triode；40th pin of fourth chip passes through the first crystal oscillator and the 41st pin of fourth chip
It is connected, the 40th pin of fourth chip is also by the 65th capacity earth, and the 40th pin of fourth chip is also by the
65 electric capacity, the 66th electric capacity are connected with the 41st pin of fourth chip；42nd pin of fourth chip leads to
Cross the 13rd resistance with BAT signal ends to be connected, the 42nd pin of fourth chip passes through the 16th resistance eutral grounding, fourth chip
The 42nd pin also pass through the 73rd capacity earth；43rd pin of fourth chip is connect by the 51st electric capacity
Ground, the 44th pin of fourth chip are grounded by the 88th capacity earth, the 45th pin of fourth chip, and the 4th
48th pin of chip passes through the 24th capacity earth；First pin of fourth chip by the 19th capacity earth,
The second pin of fourth chip is grounded by the 23rd pin, the 3rd pin ground connection of fourth chip；The second of fourth chip
15 pins are connected by the 97th resistance with 3V3 signal ends, the 25th pin of fourth chip also with the 5th triode
Colelctor electrode be connected, the grounded emitter of the 5th triode, the base stage of the 5th triode passes through the 96th resistance and SD signals
End is connected, and the base stage of the 5th triode passes through the 98th resistance eutral grounding；
The TF card circuit includes TF card interface chip, the 18th resistance, the 19th resistance and the 89th electric capacity, TF card interface chip
The 4th end be connected by the 18th resistance with 3V3 signal ends, the 4th end of TF card interface chip is also connect by the 89th electric capacity
Ground, the 5th end of TF card interface chip are connected by the 19th resistance with the 9th end of TF card interface chip；The 3rd of TF card interface chip
End is connected with the 35th pin of fourth chip, the 5th end of TF card interface chip and the 34th pin phase of fourth chip
Even, the 6th end ground connection of TF card interface chip, the 7th end of TF card interface chip is connected with the 36th pin of fourth chip；
The AUX circuits include hard contact end, the 82nd resistance, the 83rd resistance, the 84th resistance, the 49th
Resistance, the 50th resistance, the 71st electric capacity, the 72nd electric capacity, the 94th electric capacity and the 95th electric capacity；Hard contact
The second end ground connection at end, the 3rd end at hard contact end passes sequentially through the 82nd resistance, the 95th electric capacity and fourth chip
The 6th pin be connected, the 3rd end at hard contact end also passes sequentially through the 82nd resistance, the 71st capacity earth, the 7th
The 49th resistance is also parallel with 11 electric capacity, the 4th end at hard contact end passes sequentially through the 83rd resistance, the 90th
Four electric capacity are connected with the 5th pin of fourth chip, and the 4th end at hard contact end also passes sequentially through the 83rd resistance, the 7th
12 capacity earths, the 50th resistance are also parallel with the 72nd electric capacity, the 5th end at hard contact end also passes through the 80th
Four resistance are connected with the 22nd pin of fourth chip；
The on/off circuit includes switch key and the 47th resistance, and the 12nd pin of fourth chip passes through the 47th
Resistance and switch key ground connection；
The key circuit includes the 73rd resistance, the 60th resistance, the 62nd resistance, the 65th resistance, the 70th
Two resistance, the 51st resistance, the 87th resistance, the 48th resistance, the second button, the 3rd button, the 4th button, the 5th
Button, the 6th button, the 7th button and the 8th button；27th pin of fourth chip respectively with the 60th resistance, the 6th
12 resistance, the 65th resistance, the 72nd resistance, the 51st resistance, the 87th resistance and the 48th resistance phase
Even, the 27th pin of fourth chip is also connected by the 73rd resistance with 3V3 signal ends, and the 60th resistance passes through the 6th
Button is grounded, and the 62nd resistance is grounded by the 5th button, and the 65th resistance is grounded by the 4th button, the 72nd electricity
Resistance is grounded by the 3rd button, and the 51st resistance is grounded by the 7th button, and the 87th resistance is grounded by the second button,
48th resistance is grounded by the 8th button；
The indicator light circuit includes the first light emitting diode, the second light emitting diode, the 57th resistance and the 81st electricity
Resistance, the 16th pin of fourth chip are grounded by the 57th resistance and the first light emitting diode, and the 20th of fourth chip the
Eight pins are grounded by the 81st resistance and the second light emitting diode.
2. a kind of Baffle Box of Bluetooth control circuit according to claim 1, it is characterised in that also include including vibration alarming circuit
52nd resistance, vibration switch and the 84th electric capacity, P17 signal detections end are connect by the 52nd resistance, vibration switch
Ground, P17 signal detections end also pass through the 52nd resistance, the 84th capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710801683.4A CN107371098A (en) | 2017-09-07 | 2017-09-07 | A kind of Baffle Box of Bluetooth control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710801683.4A CN107371098A (en) | 2017-09-07 | 2017-09-07 | A kind of Baffle Box of Bluetooth control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107371098A true CN107371098A (en) | 2017-11-21 |
Family
ID=60311366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710801683.4A Pending CN107371098A (en) | 2017-09-07 | 2017-09-07 | A kind of Baffle Box of Bluetooth control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107371098A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113727227A (en) * | 2021-09-29 | 2021-11-30 | 东莞市金典有机玻璃工艺制品有限公司 | Intelligent electronic product display device |
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| JP2008172409A (en) * | 2007-01-10 | 2008-07-24 | Yamaha Corp | Sound collection device and audio transmission system |
| CN205305086U (en) * | 2015-12-01 | 2016-06-08 | 嘉兴职业技术学院 | Multifunctional bluetooth sound box |
| WO2016150190A1 (en) * | 2015-03-23 | 2016-09-29 | 广东欧珀移动通信有限公司 | Audio playing control method and apparatus, and loudspeaker box |
| CN206042263U (en) * | 2016-09-25 | 2017-03-22 | 钟琼儿 | Prevent losing bluetooth speaker |
-
2017
- 2017-09-07 CN CN201710801683.4A patent/CN107371098A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008172409A (en) * | 2007-01-10 | 2008-07-24 | Yamaha Corp | Sound collection device and audio transmission system |
| WO2016150190A1 (en) * | 2015-03-23 | 2016-09-29 | 广东欧珀移动通信有限公司 | Audio playing control method and apparatus, and loudspeaker box |
| CN205305086U (en) * | 2015-12-01 | 2016-06-08 | 嘉兴职业技术学院 | Multifunctional bluetooth sound box |
| CN206042263U (en) * | 2016-09-25 | 2017-03-22 | 钟琼儿 | Prevent losing bluetooth speaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113727227A (en) * | 2021-09-29 | 2021-11-30 | 东莞市金典有机玻璃工艺制品有限公司 | Intelligent electronic product display device |
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Application publication date: 20171121 |
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