CN106130345A - A kind of anti-power failure liquid crystal display screen power supply - Google Patents
A kind of anti-power failure liquid crystal display screen power supply Download PDFInfo
- Publication number
- CN106130345A CN106130345A CN201610753807.1A CN201610753807A CN106130345A CN 106130345 A CN106130345 A CN 106130345A CN 201610753807 A CN201610753807 A CN 201610753807A CN 106130345 A CN106130345 A CN 106130345A
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- Prior art keywords
- electric capacity
- resistance
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- diode
- pin
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
Abstract
A kind of anti-power failure liquid crystal display screen power supply.It includes housing, mu balanced circuit, change-over circuit, transforming circuit, battery, inverter, the pin 5 of mu balanced circuit chip U1 connects resistance R4, inductance L1, electric capacity C6 and high level VCC, the other end of described resistance R4 is connected with the pin 4 of chip U1, the other end of described electric capacity C6 and the equal ground connection of pin 2 of chip U1, the pin 1 of described chip U1 connects the other end having inductance L1, the positive pole of diode D4 and electric capacity C2, the other end of described electric capacity C2 connects negative pole and the positive pole of diode D1 having diode D2, the positive pole of described diode D2 connects resistance R3, and the other end ground connection of resistance R3, the negative pole of described diode D1 connects electric capacity C1, resistance R1 and the emitter stage of NPN type triode Q1.The present invention connects simply, economical and practical, and the driving stabilized circuit outputting voltage of liquid crystal display module is stable so that production cost is substantially reduced.
Description
Technical field
The present invention relates to drive mu balanced circuit technical field, particularly relate to a kind of anti-power failure liquid crystal display screen power supply.
Background technology
Along with the progress of lcd technology, liquid crystal display application in daily life is more and more extensive,
The driving of liquid crystal display is an ingredient indispensable in lcd applications.Cost and profit are that businessman is concerned about
Two eternal themes, the input voltage driving mu balanced circuit of liquid crystal display module is 3.3 volts, and output voltage is respectively VGH
=15 volts.VGL=-10 lies prostrate, and AVDD=10 lies prostrate, and the circuit driving mu balanced circuit of available liquid crystal display module connects complexity, and
The spread of voltage of output, needs other regulated power supply to coordinate so that relatively costly.
Summary of the invention
The invention aims to solve shortcoming present in prior art, and a kind of anti-power failure liquid crystal display screen proposed is electric
Source.
To achieve these goals, present invention employs following technical scheme:
A kind of anti-power failure liquid crystal display screen power supply, it includes housing, mu balanced circuit, transforming circuit, change-over circuit, battery, inversion
Device, is provided with mu balanced circuit, change-over circuit, transforming circuit, battery, inverter in described housing, described mu balanced circuit one terminates
Another termination transforming circuit of alternating current power supply, transforming circuit connects change-over circuit again, and described mu balanced circuit is also by inverter and battery
Connecting, described mu balanced circuit includes that pin 5 connection of chip U1 and element U2, described chip U1 has resistance R4, inductance L1, electric capacity
C6 and high level VCC, the other end of described resistance R4 is connected with the pin 4 of chip U1, the other end of described electric capacity C6 and core
The equal ground connection of pin 2 of sheet U1, the pin 1 of described chip U1 connects the other end of inductance L1, the positive pole of diode D4 and electric capacity
The other end of C2, described electric capacity C2 connects negative pole and the positive pole of diode D1 having diode D2, the positive pole of described diode D2
Connecting and have resistance R3, and the other end ground connection of resistance R3, the negative pole of described diode D1 connects electric capacity C1, resistance R1 and NPN
The emitter stage of type audion Q1, the colelctor electrode of described NPN type triode Q1 connects outfan VGH, described NPN type triode Q1
The equal ground connection of the other end of base stage, the other end of resistance R1 and electric capacity C1, the negative pole of described diode D4 connects electric capacity C5, electricity
Holding C4, resistance R2 and output terminals A VDD, the other end of described electric capacity C5 is connected with the pin 3 of chip U1, described resistance R2's
Second end is connected with output terminals A VDD, and the three-terminal link of resistance R2 have the negative pole of diode D3, the positive pole of electric capacity C3 and
Outfan VCOM, and the equal ground connection of the other end of the negative pole of electric capacity C3, the positive pole of diode D3 and electric capacity C4, described output terminals A VDD
Connect and have electric capacity C7 and resistance R5, and the other end of electric capacity C7 connects the base stage having the other end of resistance R5, PNP type triode Q2
With the base stage of PNP type triode Q3, the emitter stage of described PNP type triode Q2 connects high level VCC, described positive-negative-positive three pole
The colelctor electrode of pipe Q2 connects pin 1 and the emitter stage of PNP type triode Q3 having element U2, and the current collection of PNP type triode Q3
Pole ground connection, the pin of described element U2 connect have the other end of electric capacity C8, described electric capacity C8 connect have resistance R6 the first end and
Second end, and the other end ground connection of electric capacity C8, the three-terminal link of described resistance R6 has the pin 3 of outfan VGL and element U2.
Preferably, described element U2 is integrated regulator, and the model of element U2 is LM7810.
Preferably, described resistance R2 and resistance R6 is swept resistance.
Preferably, described electric capacity C3 is electrochemical capacitor, and diode D3 is Zener diode.
Preferably, the model of described chip U1 uses LM27313.
Beneficial effects of the present invention: by PNP type triode Q2 respectively with PNP type triode Q3, electric capacity C7 and resistance R5
Having collectively constituted a negater circuit, output terminals A vdd voltage can be directly changed into the anti-of output terminals A VDD by this negater circuit
To voltage so that circuit connects simple, greatly reduces production cost；By PNP type triode Q1 respectively with resistance R1, electricity
Holding C1 and collectively constituted the first mu balanced circuit, this mu balanced circuit can carry out voltage stabilizing process to the voltage of outfan VGH so that defeated
Go out voltage stabilization；Together constituting the second mu balanced circuit with electric capacity C8, resistance R6 respectively by element U2, this mu balanced circuit is permissible
The voltage of outfan VGL is carried out voltage stabilizing process so that output voltage stabilization；The circuit of the present invention connects simple, economical and practical,
And the output voltage stabilization driving mu balanced circuit of liquid crystal display module, it is not necessary to regulated power supply coordinates so that production cost
It is substantially reduced.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.
With reference to Fig. 1, a kind of anti-power failure liquid crystal display screen power supply, it includes housing, mu balanced circuit, transforming circuit, change-over circuit, electricity
Pond, inverter, be provided with mu balanced circuit, change-over circuit, transforming circuit, battery, inverter, described mu balanced circuit in described housing
Another termination transforming circuit of one termination alternating current power supply, transforming circuit connects change-over circuit again, and described mu balanced circuit also provides for inverter
Being connected with battery, described mu balanced circuit includes chip U1 and element U2, and the pin 5 of chip U1 connects resistance R4, inductance L1, electricity
Holding C6 and high level VCC, the other end of resistance R4 is connected with the pin 4 of chip U1, the other end of electric capacity C6 and chip U1's
The equal ground connection of pin 2, the pin 1 of chip U1 connects the other end of inductance L1, the positive pole of diode D4 and electric capacity C2, electric capacity C2's
The other end connects negative pole and the positive pole of diode D1 having diode D2, and the positive pole of diode D2 connects resistance R3, and resistance
The other end ground connection of R3, the negative pole of diode D1 connects electric capacity C1, resistance R1 and the emitter stage of NPN type triode Q1, NPN type
The colelctor electrode of audion Q1 connects outfan VGH, the base stage of NPN type triode Q1, the other end of resistance R1 and electric capacity C1's
The equal ground connection of the other end, the negative pole of diode D4 connects electric capacity C5, electric capacity C4, resistance R2 and output terminals A VDD, and electric capacity C5's is another
One end is connected with the pin 3 of chip U1, and second end of resistance R2 is connected with output terminals A VDD, and the 3rd end of resistance R2 is even
It is connected to the negative pole of diode D3, the positive pole of electric capacity C3 and outfan VCOM, and the negative pole of electric capacity C3, the positive pole of diode D3 and electricity
Holding the equal ground connection of the other end of C4, output terminals A VDD connects electric capacity C7 and resistance R5, and the other end connection of electric capacity C7 has resistance
The other end of R5, the base stage of PNP type triode Q2 and the base stage of PNP type triode Q3, the emitter stage of PNP type triode Q2 connects
Having high level VCC, the colelctor electrode of PNP type triode Q2 connects pin 1 and the emitter stage of PNP type triode Q3 having element U2,
And the grounded collector of PNP type triode Q3, the pin of element U2 connects has the other end connection of electric capacity C8, electric capacity C8 to have resistance
First end of R6 and the second end, and the other end ground connection of electric capacity C8, the three-terminal link of resistance R6 has outfan VGL and element U2
Pin 3, element U2 is integrated regulator, and the model of element U2 is LM7810, and resistance R2 and resistance R6 is swept resistance,
Electric capacity C3 is electrochemical capacitor, and diode D3 is Zener diode, and the model of chip U1 uses LM27313.
Operation principle: chip U1 together constitutes power driving circuit with resistance R4, inductance L1 and electric capacity C6 respectively, this electricity
Source driving circuit can be that the regulating circuit that diode D4, electric capacity C5 and electric capacity C4 collectively constitute provides input voltage, and adjusts
The outfan of volt circuit be drive mu balanced circuit output terminals A VDD, this power driving circuit can also be resistance R3, electric capacity C2,
The first output circuit that diode D1, diode D2, electric capacity C1, resistance R1 and NPN type triode Q1 collectively form provides input
Voltage, this first output circuit provides the outfan of input voltage to be the outfan VGH driving mu balanced circuit, the first output simultaneously
NPN type triode Q1, resistance R1 and electric capacity C1 on potential circuit match, and NPN type triode Q1, resistance R1 and electric capacity C1 can
With to drive mu balanced circuit outfan VGH carry out voltage stabilizing process, the outfan of regulating circuit can be PNP type triode Q2,
The second output circuit that PNP type triode Q3, electric capacity C7, resistance R5, element U2, resistance R6 and electric capacity C8 collectively constitute provides defeated
Entering voltage, the outfan of the second output circuit is the outfan VGL driving mu balanced circuit, the element in the second output circuit simultaneously
U2, resistance R6 and electric capacity C8 match, and element U2, resistance R6 and electric capacity C8 can be that the outfan VGL driving mu balanced circuit enters
Row voltage stabilizing processes, the 3rd output that resistance R2, diode D3 and electric capacity C3 can also be collectively constituted by the outfan of regulating circuit
Circuit provides voltage input, and the outfan of the 3rd output voltage is the outfan VCOM driving mu balanced circuit, simultaneously the 3rd output
Diode D3 in circuit can carry out voltage stabilizing process to the outfan VCOM driving mu balanced circuit.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (5)
1. an anti-power failure liquid crystal display screen power supply, it is characterised in that it include housing, mu balanced circuit, transforming circuit, change-over circuit,
Battery, inverter, be provided with mu balanced circuit, change-over circuit, transforming circuit, battery, inverter, described voltage stabilizing electricity in described housing
Road one terminates another termination transforming circuit of alternating current power supply, and transforming circuit connects change-over circuit again, and described mu balanced circuit is also by inversion
Device is connected with battery, and described mu balanced circuit includes that pin 5 connection of chip U1 and element U2, described chip U1 has resistance R4, electricity
Sense L1, electric capacity C6 and high level VCC, the other end of described resistance R4 is connected with the pin 4 of chip U1, and described electric capacity C6's is another
The equal ground connection of pin 2 of one end and chip U1, the pin 1 of described chip U1 connects just is having the other end of inductance L1, diode D4
Pole and electric capacity C2, the other end of described electric capacity C2 connects negative pole and the positive pole of diode D1 having diode D2, described diode
The positive pole of D2 connects resistance R3, and the other end ground connection of resistance R3, and the negative pole of described diode D1 connects electric capacity C1, resistance
R1 and the emitter stage of NPN type triode Q1, the colelctor electrode of described NPN type triode Q1 connects outfan VGH, described NPN type
The equal ground connection of the other end of the base stage of audion Q1, the other end of resistance R1 and electric capacity C1, the negative pole of described diode D4 connects to be had
Electric capacity C5, electric capacity C4, resistance R2 and output terminals A VDD, the other end of described electric capacity C5 is connected with the pin 3 of chip U1, described
Second end of resistance R2 is connected with output terminals A VDD, and the three-terminal link of resistance R2 has the negative pole of diode D3, electric capacity C3
Positive pole and outfan VCOM, and the equal ground connection of the other end of the negative pole of electric capacity C3, the positive pole of diode D3 and electric capacity C4, described defeated
Go out to hold AVDD to connect and have electric capacity C7 and resistance R5, and the other end connection of electric capacity C7 has the other end of resistance R5, PNP type triode
The base stage of Q2 and the base stage of PNP type triode Q3, the emitter stage of described PNP type triode Q2 connects high level VCC, described
The colelctor electrode of PNP type triode Q2 connects pin 1 and the emitter stage of PNP type triode Q3 having element U2, and PNP type triode
The grounded collector of Q3, the pin of described element U2 connects has the other end connection of electric capacity C8, described electric capacity C8 to have resistance R6's
First end and the second end, and the other end ground connection of electric capacity C8, the three-terminal link of described resistance R6 has outfan VGL and element U2
Pin 3.
A kind of anti-power failure liquid crystal display screen power supply the most according to claim 1, it is characterised in that described element U2 is integrated voltage-stabilized
Device, and the model of element U2 is LM7810.
A kind of anti-power failure liquid crystal display screen power supply the most according to claim 1, it is characterised in that described resistance R2 and resistance R6 is equal
For swept resistance.
A kind of anti-power failure liquid crystal display screen power supply the most according to claim 1, it is characterised in that described electric capacity C3 is electrolysis electricity
Hold, and diode D3 is Zener diode.
A kind of anti-power failure liquid crystal display screen power supply the most according to claim 1, it is characterised in that the model of described chip U1 uses
LM27313。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753807.1A CN106130345A (en) | 2016-08-29 | 2016-08-29 | A kind of anti-power failure liquid crystal display screen power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753807.1A CN106130345A (en) | 2016-08-29 | 2016-08-29 | A kind of anti-power failure liquid crystal display screen power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106130345A true CN106130345A (en) | 2016-11-16 |
Family
ID=57272165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610753807.1A Pending CN106130345A (en) | 2016-08-29 | 2016-08-29 | A kind of anti-power failure liquid crystal display screen power supply |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310522A (en) * | 2000-02-21 | 2001-08-29 | 阿尔卑斯电气株式会社 | Power circuit |
| DE202007004436U1 (en) * | 2007-03-27 | 2007-06-06 | Gude, Michael, Dr. | Switching voltage converter for use in electrical engineering, has integrated longitudinal regulator utilized as voltage reference and standard-logic-integrated circuit utilized as control circuit |
| CN101692324A (en) * | 2009-09-29 | 2010-04-07 | 深圳市国显科技有限公司 | Timing controller with built-in voltage stabilizing circuit function |
| CN201466972U (en) * | 2009-05-12 | 2010-05-12 | 许晓华 | Direct current (DC) reduction voltage circuit |
| CN101739378A (en) * | 2009-12-31 | 2010-06-16 | 海洋王照明科技股份有限公司 | Driving circuit of EIB (European installation bus) bus transmitting device |
| CN204906185U (en) * | 2015-09-09 | 2015-12-23 | 衢州市沃思电子技术有限公司 | Constant voltage power supply |
-
2016
- 2016-08-29 CN CN201610753807.1A patent/CN106130345A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310522A (en) * | 2000-02-21 | 2001-08-29 | 阿尔卑斯电气株式会社 | Power circuit |
| DE202007004436U1 (en) * | 2007-03-27 | 2007-06-06 | Gude, Michael, Dr. | Switching voltage converter for use in electrical engineering, has integrated longitudinal regulator utilized as voltage reference and standard-logic-integrated circuit utilized as control circuit |
| CN201466972U (en) * | 2009-05-12 | 2010-05-12 | 许晓华 | Direct current (DC) reduction voltage circuit |
| CN101692324A (en) * | 2009-09-29 | 2010-04-07 | 深圳市国显科技有限公司 | Timing controller with built-in voltage stabilizing circuit function |
| CN101739378A (en) * | 2009-12-31 | 2010-06-16 | 海洋王照明科技股份有限公司 | Driving circuit of EIB (European installation bus) bus transmitting device |
| CN204906185U (en) * | 2015-09-09 | 2015-12-23 | 衢州市沃思电子技术有限公司 | Constant voltage power supply |
Non-Patent Citations (1)
| Title |
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| 刘胜辉 等: ""基于NIOS Ⅱ的多功能数码相框设计"", 《现代电子技术》 * |
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Application publication date: 20161116 |
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| RJ01 | Rejection of invention patent application after publication |