CN108091294A - A kind of intelligent exhibition screen drive system - Google Patents
A kind of intelligent exhibition screen drive system Download PDFInfo
- Publication number
- CN108091294A CN108091294A CN201711464526.5A CN201711464526A CN108091294A CN 108091294 A CN108091294 A CN 108091294A CN 201711464526 A CN201711464526 A CN 201711464526A CN 108091294 A CN108091294 A CN 108091294A
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Power Conversion In General (AREA)
Abstract
A kind of intelligent exhibition screen drive system of disclosure of the invention, including power circuit, electromagnetic interface filter, current rectifying and wave filtering circuit, soft starting circuit, protect circuit, power circuit, sample circuit, power conversion circuit, pulse-width modulation circuit and compare amplifying circuit, electromagnetic interface filter one end connection power input Vi, electromagnetic interface filter is also respectively connected with current rectifying and wave filtering circuit and protection circuit, current rectifying and wave filtering circuit is also connected with soft starting circuit, soft starting circuit is also connected with power conversion circuit, power conversion circuit is also respectively connected with the output rectifier and filter other end and power circuit.The present invention uses small power electric source module, extensive control integrated circuit does the basic element of character, significantly reduces the development pressure to high performance components and device, simplifies thermal design, and excessive chip need not be used so that driving keeps higher efficiency and reliability.
Description
Technical field
The present invention relates to a kind of drive systems, are specifically a kind of intelligent exhibition screen drive system.
Background technology
At present, display screen forms matrix circuit by several light-emitting components, and passes through drive control and reach display function, main
The type of drive to be used is the scanning of timesharing row, and row are driven using constant pressure or constant current, row scanning with a quarter of mainstream, eight points
One of and ten six/first-class row scanning series based on, the on-off circuit chip often gone by Time share scanning control display screen matrix
Often capable light-emitting component is driven to realize capable driving, display screen matrix column output termination constant pressure or constant current chip arrange drive to realize
It is dynamic.
However, in existing display screen matrix display drive apparatus, the row, column scan control of display screen matrix is independent
It is controlled by integrated circuit, and passes through peripheral control unit and be scanned control.Therefore display screen matrix veneer usually requires
Carried out data transmission using a plurality of winding displacement, especially as the increase of screen size, display screen matrix size increases, core on veneer
The quantity of piece is more and more, and the fraction defective for causing manufacture is higher and higher, these problems are always screen display technology field puzzlement
The problem of.Therefore, a large amount of additional chips of display screen matrix display drive apparatus needs, driving control are the shortcomings that the prior art
System is complicated, while brings the influence of product yield.
The content of the invention
It is an object of the invention to provide a kind of intelligent exhibition screen drive system, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the present invention provides following technical solution：
A kind of intelligent exhibition screen drive system, including power circuit, electromagnetic interface filter, current rectifying and wave filtering circuit, soft starting circuit,
It protects circuit, power circuit, sample circuit, power conversion circuit, pulse-width modulation circuit and compares amplifying circuit, the EMI filters
Ripple device one end connects power input Vi, and electromagnetic interface filter is also respectively connected with current rectifying and wave filtering circuit and protection circuit, rectifying and wave-filtering electricity
Road is also connected with soft starting circuit, and soft starting circuit is also connected with power conversion circuit, and it is whole that power conversion circuit is also respectively connected with output
The stream filter circuit other end and power circuit, power circuit are also connected with pulse-width modulation circuit, and pulse-width modulation circuit is also respectively connected with
It protects the circuit other end, reference voltage source and compares amplifying circuit, compare amplifying circuit and be also respectively connected with the sample circuit other end
With the reference voltage source other end；The power circuit includes reduction voltage circuit, control circuit, start-up circuit and filter circuit, described
Reduction voltage circuit realizes the transfer process of DC-DC by the transformation twice of transformer T1 and transformer T2, and reduction voltage circuit includes transformation
Device T1, transformer T2 and resistance R4, the control circuit use peak current mode double -loop control mode, i.e., are controlled in voltage close loop
Peak point current feedback control is added in system, control circuit includes chip IC, capacitance C6 and resistance R2, the start-up circuit and passes through
The break-make of Mos pipes starts entire DC-DC conversion circuits, and start-up circuit includes Mos pipes, diode D2 and resistance R1, the filtering
Circuit filters off extra mixed and disorderly voltage signal, and filter circuit includes capacitance C1 and capacitance C2；The ground capacity C1 other ends point
Diode D1 cathode, ground capacity C2, diode D2 anodes, Mos pipe D poles and input terminal Uo, diode D2 Lian Jie be grounded to bear
Pole connects resistance R1, and the resistance R1 other ends connect ground capacity C2, ground capacity C3, resistance R14 and chip IC port 2 respectively,
Chip IC port 1 connects ground capacity C4 and resistance R2 respectively, and chip IC port 3 connects capacitance C5, the connection of the capacitance C5 other ends
Transformer T1 secondary, transformer T1 secondary other end ground connection, chip IC port 4 are grounded, and chip IC port 5 connects resistance R2 respectively
The other end and ground capacity C8, chip IC port 6 connect resistance R9 and ground capacity C7 respectively, and chip IC port 7 connects respectively
Capacitance C6, resistance R3 and resistance R10, chip IC port 8 connect the capacitance C6 other ends and the resistance R3 other ends, the resistance respectively
The R10 other ends connect ground resistance R11, resistance R12 and resistance R13 respectively, and the resistance R14 other ends connect diode D6 and bear
Pole, diode D6 anodes connect the resistance R12 other ends, the resistance R13 other ends, inductance L, diode D7, capacitance C9 and defeated respectively
Outlet Ui, inductance the L other end connect ground connection diode D4 cathode, ground connection diode D5 cathode and transformer T2 secondary respectively, become
Depressor T2 primary sides one end is grounded, and the transformer T2 primary sides other end connects ground resistance R6 and diode D3 anodes, diode respectively
D3 cathode connect ground resistance R7, ground resistance R8 and the resistance R9 other ends, the transformer T2 secondary other end difference respectively
Resistance R5, Mos pipe S poles and transformer T1 primary sides are connected, the transformer T1 primary sides other end connects resistance R4 respectively and resistance R5 is another
One end, resistance R4 other ends connection Mos pipe G poles.
As further embodiment of the present invention：The 1 model UC3845A of chip IC.
As further scheme of the invention：The output voltage values Ui is by resistance R14 resistance values, diode D7 pressure voltages
It is determined with capacitance C9 capacitances.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is extensive to control using small power electric source module
Integrated circuit does the basic element of character, significantly reduces the development pressure to high performance components and device, simplifies thermal design, and not
It needs to use excessive chip so that driving keeps higher efficiency and reliability.
Description of the drawings
Fig. 1 is the structure diagram of intelligent exhibition screen drive system.
Fig. 2 is the structure diagram of power circuit in intelligent exhibition screen drive system.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
Please refer to Fig.1~2, in the embodiment of the present invention, a kind of intelligent exhibition screen drive system, including power circuit, EMI
Wave filter, current rectifying and wave filtering circuit, soft starting circuit, protection circuit, power circuit, sample circuit, power conversion circuit, pulsewidth tune
Circuit processed connects power input Vi with amplifying circuit, described electromagnetic interface filter one end is compared, and electromagnetic interface filter is also respectively connected with whole
Filter circuit and protection circuit are flowed, current rectifying and wave filtering circuit is also connected with soft starting circuit, and soft starting circuit is also connected with power conversion electricity
Road, power conversion circuit are also respectively connected with the output rectifier and filter other end and power circuit, and power circuit is also connected with pulsewidth
Modulation circuit, pulse-width modulation circuit are also respectively connected with the protection circuit other end, reference voltage source and compare amplifying circuit, compare and put
Big circuit is also respectively connected with the sample circuit other end and the reference voltage source other end；The power circuit includes reduction voltage circuit, control
Circuit processed, start-up circuit and filter circuit, the reduction voltage circuit pass through the transformation twice of transformer T1 and transformer T2, realize
The transfer process of DC-DC, reduction voltage circuit include transformer T1, transformer T2 and resistance R4, and the control circuit is using peak value electricity
Flow pattern double -loop control mode, i.e., add in peak point current feedback control in voltage close loop control system, and control circuit includes chip
IC, capacitance C6 and resistance R2, the start-up circuit start entire DC-DC conversion circuits, start-up circuit bag by the break-make of Mos pipes
Mos pipes, diode D2 and resistance R1 are included, the filter circuit filters off extra mixed and disorderly voltage signal, and filter circuit includes capacitance
C1 and capacitance C2；The ground capacity C1 other ends are connecting ground connection diode D1 cathode, ground capacity C2, diode D2 just respectively
Pole, Mos pipe D poles and input terminal Uo, diode D2 cathode connection resistance R1, the resistance R1 other ends connect respectively ground capacity C2,
Ground capacity C3, resistance R14 and chip IC port 2, chip IC port 1 connect ground capacity C4 and resistance R2, chip IC respectively
Port 3 connects capacitance C5, capacitance C5 other ends connection transformer T1 secondary, transformer T1 secondary other end ground connection, chip IC end
Mouth 4 is grounded, and chip IC port 5 connects the resistance R2 other ends and ground capacity C8 respectively, and chip IC port 6 connects resistance R9 respectively
With ground capacity C7, chip IC port 7 connects capacitance C6, resistance R3 and resistance R10 respectively, and chip IC port 8 connects electricity respectively
Hold the C6 other ends and the resistance R3 other ends, the resistance R10 other ends connect ground resistance R11, resistance R12 and resistance respectively
R13, the resistance R14 other ends connect diode D6 cathode, and diode D6 anodes connect the resistance R12 other ends, resistance respectively
The R13 other ends, inductance L, diode D7, capacitance C9 and output terminal Ui, the inductance L other ends connect ground connection diode D4 and bear respectively
Pole, ground connection diode D5 cathode and transformer T2 secondary, transformer T2 primary sides one end ground connection, transformer T2 primary sides other end difference
Connection ground resistance R6 and diode D3 anodes, diode D3 cathode connect ground resistance R7, ground resistance R8 and resistance respectively
The R9 other ends, the transformer T2 secondary other end connect resistance R5, Mos pipe S poles and transformer T1 primary sides, transformer T1 respectively
The primary side other end connects resistance R4 and the resistance R5 other ends, resistance R4 other ends connection Mos pipe G poles respectively.
The 1 model UC3845A of chip IC.
The output voltage values Ui is determined by resistance R14 resistance values, diode D7 pressure voltages and capacitance C9 capacitances.
Power supply provides voltage through diode D2 and resistance R1 for chip IC 1, and 1 port 3 of chip IC exports pulse through capacitance C5
The vibration of Mos pipes is driven after being coupled with transformer T1, output current is filtered backward by inductance L through capacitance C9 after Mos pipes turn on
Load supplying, when Mos pipes end, inductance L magnetic energy is changed into electric energy, and polarity is left to bear the right side just, sustained diode 4 and afterflow
Diode D5 is turned on, and electric current continues to power to the load by sustained diode 4 and sustained diode 5, and load is made to obtain smoothly
Direct current, when output voltage is too low or excessively high, from resistance R10, resistance R11, resistance R12 composition bleeder circuit in taken
Sample voltage is sent to chip IC 1 and more afterwards Mos pipes is controlled to turn on pulsewidth with 1 internal reference voltage of chip IC, so that output voltage
Stablized.When load current generation is short-circuit or more than 8A, the voltage rising of 1 port 3 of chip IC can control pulsewidth to manage Mos
Cut-off, to ensure the safety of Mos pipes.
Output voltage Ui can be adjusted by regulation resistance R14 resistance values, diode D7 pressure voltages and capacitance C9 capacitances, obtained
Any voltage value between 0 ~ 48V.To ensure Mos pipes safety, input voltage Uo is preferably no more than 48V.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
Using specification as an entirety, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (3)
1. a kind of intelligent exhibition screen drive system, including power circuit, electromagnetic interface filter, current rectifying and wave filtering circuit, soft start electricity
Road protects circuit, power circuit, sample circuit, power conversion circuit, pulse-width modulation circuit and compares amplifying circuit, feature
It is, described electromagnetic interface filter one end connects power input Vi, and electromagnetic interface filter is also respectively connected with current rectifying and wave filtering circuit and protection
Circuit, current rectifying and wave filtering circuit are also connected with soft starting circuit, and soft starting circuit is also connected with power conversion circuit, and power conversion circuit is also
It connects the output rectifier and filter other end respectively and power circuit, power circuit is also connected with pulse-width modulation circuit, pulsewidth modulation
Circuit is also respectively connected with the protection circuit other end, reference voltage source and compares amplifying circuit, compares amplifying circuit and is also respectively connected with
The sample circuit other end and the reference voltage source other end；The power circuit include reduction voltage circuit, control circuit, start-up circuit and
Filter circuit, the reduction voltage circuit are realized the transfer process of DC-DC, are dropped by the transformation twice of transformer T1 and transformer T2
Volt circuit includes transformer T1, transformer T2 and resistance R4, and the control circuit uses peak current mode double -loop control mode, i.e.,
Peak point current feedback control is added in voltage close loop control system, control circuit includes chip IC, capacitance C6 and resistance R2, institute
It states start-up circuit and entire DC-DC conversion circuits is started by the break-make of Mos pipes, start-up circuit includes Mos pipes, diode D2 and electricity
R1 is hindered, the filter circuit filters off extra mixed and disorderly voltage signal, and filter circuit includes capacitance C1 and capacitance C2；The ground connection electricity
Hold the C1 other ends and connect ground connection diode D1 cathode, ground capacity C2, diode D2 anodes, Mos pipe D poles and input terminal respectively
Uo, diode D2 cathode connect resistance R1, the resistance R1 other ends connect respectively ground capacity C2, ground capacity C3, resistance R14 and
Chip IC port 2, chip IC port 1 connect ground capacity C4 and resistance R2 respectively, and chip IC port 3 connects capacitance C5, capacitance
The C5 other ends connect transformer T1 secondary, transformer T1 secondary other end ground connection, and chip IC port 4 is grounded, and chip IC port 5 is divided
Not Lian Jie the resistance R2 other ends and ground capacity C8, chip IC port 6 connects resistance R9 and ground capacity C7, chip IC end respectively
Mouth 7 connects capacitance C6, resistance R3 and resistance R10 respectively, and chip IC port 8 connects the capacitance C6 other ends respectively and resistance R3 is another
End, the resistance R10 other ends connect ground resistance R11, resistance R12 and resistance R13 respectively, and the resistance R14 other ends connect
Diode D6 cathode are connect, diode D6 anodes connect the resistance R12 other ends, the resistance R13 other ends, inductance L, diode respectively
D7, capacitance C9 and output terminal Ui, the inductance L other ends connect ground connection diode D4 cathode, ground connection diode D5 cathode and change respectively
Depressor T2 secondary, transformer T2 primary sides one end ground connection, the transformer T2 primary sides other end connect ground resistance R6 and diode respectively
D3 anodes, diode D3 cathode connect ground resistance R7, ground resistance R8 and the resistance R9 other ends, the transformer T2 pairs respectively
The side other end connects resistance R5, Mos pipe S poles and transformer T1 primary sides respectively, and the transformer T1 primary side other ends connect resistance respectively
R4 and the resistance R5 other ends, resistance R4 other ends connection Mos pipe G poles.
2. intelligent exhibition screen drive system according to claim 1, which is characterized in that 1 model of chip IC
UC3845A。
3. intelligent exhibition screen drive system according to claim 1, which is characterized in that the output voltage values Ui is by electricity
R14 resistance values, diode D7 pressure voltages and capacitance C9 capacitances is hindered to determine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464526.5A CN108091294A (en) | 2017-12-28 | 2017-12-28 | A kind of intelligent exhibition screen drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464526.5A CN108091294A (en) | 2017-12-28 | 2017-12-28 | A kind of intelligent exhibition screen drive system |
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| Publication Number | Publication Date |
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| CN108091294A true CN108091294A (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711464526.5A Pending CN108091294A (en) | 2017-12-28 | 2017-12-28 | A kind of intelligent exhibition screen drive system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201433064A (en) * | 2013-02-05 | 2014-08-16 | Univ Nat Kaohsiung Applied Sci | Single-stage high power factor zero-current detecting variable-frequency asymmetric half-bridge converter |
| CN204031528U (en) * | 2014-06-25 | 2014-12-17 | 宁夏博通卓润节能环保科技有限公司 | A kind of energy-conservation driving circuit of high-power LED lamp |
| CN204205959U (en) * | 2014-11-17 | 2015-03-11 | 宁波经济技术开发区恒率电源科技有限公司 | A kind of DC-DC power source converter circuit |
| CN105450018A (en) * | 2015-12-30 | 2016-03-30 | 国网山东郓城县供电公司 | Power boost chopper control system |
| CN107508475A (en) * | 2017-10-21 | 2017-12-22 | 河南寰球航空装备科技有限公司 | A kind of robot electric power system |
-
2017
- 2017-12-28 CN CN201711464526.5A patent/CN108091294A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201433064A (en) * | 2013-02-05 | 2014-08-16 | Univ Nat Kaohsiung Applied Sci | Single-stage high power factor zero-current detecting variable-frequency asymmetric half-bridge converter |
| CN204031528U (en) * | 2014-06-25 | 2014-12-17 | 宁夏博通卓润节能环保科技有限公司 | A kind of energy-conservation driving circuit of high-power LED lamp |
| CN204205959U (en) * | 2014-11-17 | 2015-03-11 | 宁波经济技术开发区恒率电源科技有限公司 | A kind of DC-DC power source converter circuit |
| CN105450018A (en) * | 2015-12-30 | 2016-03-30 | 国网山东郓城县供电公司 | Power boost chopper control system |
| CN107508475A (en) * | 2017-10-21 | 2017-12-22 | 河南寰球航空装备科技有限公司 | A kind of robot electric power system |
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Application publication date: 20180529 |
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| RJ01 | Rejection of invention patent application after publication |