CN106340276A - Circuit voltage stabilizer of liquid crystal display screen - Google Patents
Circuit voltage stabilizer of liquid crystal display screen Download PDFInfo
- Publication number
- CN106340276A CN106340276A CN201610753580.0A CN201610753580A CN106340276A CN 106340276 A CN106340276 A CN 106340276A CN 201610753580 A CN201610753580 A CN 201610753580A CN 106340276 A CN106340276 A CN 106340276A
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- Prior art keywords
- electric capacity
- resistance
- diode
- pin
- chip
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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
- 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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- 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
- G09G2330/02—Details of power systems and of start or stop of display operation
Abstract
A circuit voltage stabilizer of a liquid crystal display screen comprises a casing, a voltage stabilizing circuit and a converting circuit. A pin 5 of a chip U1 of the voltage stabilizing circuit is connected with a resistor R4, an inductor L1, a capacitor C6 and a high level VCC, the other end of the resistor R4 is connected with a pin 4 of the chip U1, the other end of the capacitor C6 and a pin 2 of the chip U1 are grounded, a pin 1 of the chip U1 is connected with the other end of the inductor L1, the anode of a diode D4 and a capacitor C2, the other end of the capacitor C2 is connected with the cathode of a diode D2 and the anode of a diode D1, the anode of the diode D2 is connected with a resistor R3, the other end of the resistor R3 is grounded, and the cathode of the diode D1 is connected with the capacitor C1, a resistor R1 and the emitter of an NPN type triode Q1. According to the invention, circuit connection is simple, the voltage stabilizer is economical and practical, the voltage output by a driving voltage stabilizing circuit of a liquid crystal display module is stable, and the production cost is reduced greatly.
Description
Technical field
The present invention relates to driving mu balanced circuit technical field, more particularly, to a kind of LCDs circuit voltage stabilizing device.
Background technology
With the progress of lcd technology, application in daily life for the liquid crystal display is more and more extensive,
The driving of liquid crystal display is an indispensable ingredient in lcd applications.Cost and profit are that businessman is concerned about
Two eternal themes, the input voltage of the 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 of the 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.
Content of the invention
The invention aims to shortcoming present in solution prior art, and a kind of LCDs circuit proposing
Stable-pressure device.
To achieve these goals, present invention employs following technical scheme:
A kind of LCDs circuit voltage stabilizing device, it includes housing, mu balanced circuit, change-over circuit, sets in described housing
It is equipped with mu balanced circuit, change-over circuit, the described mu balanced circuit one termination alternating current power supply other end connects change-over circuit, described mu balanced circuit
Including chip u1 and element u2, the pin 5 of described chip u1 is connected with resistance r4, inductance l1, electric capacity c6 and high level vcc, institute
The pin 4 of the other end and chip u1 of stating resistance r4 is connected, and the other end of described electric capacity c6 and the pin 2 of chip u1 all connect
Ground, the pin 1 of described chip u1 is connected with the other end of inductance l1, the positive pole of diode d4 and electric capacity c2, described electric capacity c2's
The other end is connected with the negative pole of diode d2 and the positive pole of diode d1, and the positive pole of described diode d2 is connected with resistance r3, and
The other end ground connection of resistance r3, the negative pole of described diode d1 is connected with electric capacity c1, resistance r1 and the transmitting of npn audion q1
Pole, the colelctor electrode of described npn audion q1 is connected with outfan vgh, the base stage of described npn audion q1, resistance r1
The other end of the other end and electric capacity c1 is all grounded, and the negative pole of described diode d4 is connected with electric capacity c5, electric capacity c4, resistance r2 and defeated
Go out and hold avdd, the other end of described electric capacity c5 is connected with the pin 3 of chip u1, second end of described resistance r2 and outfan
Avdd is connected, and the three-terminal link of resistance r2 has the negative pole of diode d3, the positive pole of electric capacity c3 and outfan vcom, and electricity
The other end of negative pole, the positive pole of diode d3 and electric capacity c4 holding c3 is all grounded, described outfan avdd be connected with electric capacity c7 and
Resistance r5, and the other end of electric capacity c7 is connected with the other end of resistance r5, the base stage of pnp audion q2 and pnp audion
The base stage of q3, the emitter stage of described pnp audion q2 is connected with high level vcc, and the colelctor electrode of described pnp audion q2 is even
It is connected to the pin 1 of element u2 and the emitter stage of pnp audion q3, and the grounded collector of pnp audion q3, described element
The pin of u2 is connected with electric capacity c8, and the other end of described electric capacity c8 is connected with first end and second end of resistance r6, and electric capacity c8
Other end ground connection, 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 model lm7810 of element u2.
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 adopts lm27313.
Beneficial effects of the present invention: by pnp audion q2 respectively with pnp audion q3, electric capacity c7 and resistance r5
Collectively constitute a negater circuit, outfan avdd voltage can be directly changed into the anti-of outfan avdd by this negater circuit
To voltage so that circuit connects simply, greatly reduce production cost；By pnp audion q1 respectively with resistance r1, electricity
Hold 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；Second mu balanced circuit is together constituted with electric capacity c8, resistance r6 respectively by element u2, this mu balanced circuit is permissible
Voltage stabilizing process is carried out to the voltage of outfan vgl so that output voltage stabilization；The circuit of the present invention connects simply, economical and practical,
And the output voltage stabilization of the driving mu balanced circuit of liquid crystal display module is it is not necessary to regulated power supply is coordinating so that production cost
Substantially reduce.
Brief description
Fig. 1 is the fundamental diagram of the present invention.
Specific embodiment
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
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.
With reference to Fig. 1, a kind of LCDs circuit voltage stabilizing device, it includes housing, mu balanced circuit, change-over circuit, described
It is provided with mu balanced circuit, change-over circuit, the described mu balanced circuit one termination alternating current power supply other end connects change-over circuit, described in housing
Mu balanced circuit includes chip u1 and element u2, and the pin 5 of chip u1 is connected with resistance r4, inductance l1, electric capacity c6 and high level
The pin 4 of vcc, the other end of resistance r4 and chip u1 is connected, and the pin 2 of the other end of electric capacity c6 and chip u1 is all grounded,
The pin 1 of chip u1 is connected with the other end of inductance l1, the positive pole of diode d4 and electric capacity c2, and the other end of electric capacity c2 is connected with
The negative pole of diode d2 and the positive pole of diode d1, the positive pole of diode d2 is connected with resistance r3, and another termination of resistance r3
Ground, the negative pole of diode d1 is connected with electric capacity c1, resistance r1 and the emitter stage of npn audion q1, the collection of npn audion q1
Electrode is connected with outfan vgh, and the other end of the base stage, the other end of resistance r1 and electric capacity c1 of npn audion q1 is all grounded,
The negative pole of diode d4 is connected with electric capacity c5, electric capacity c4, resistance r2 and outfan avdd, the other end of electric capacity c5 and chip u1's
Pin 3 is connected, and second end of resistance r2 is connected with outfan avdd, and the three-terminal link of resistance r2 has diode d3's
Negative pole, the positive pole of electric capacity c3 and outfan vcom, and the other end of the negative pole of electric capacity c3, the positive pole of diode d3 and electric capacity c4 is equal
Ground connection, outfan avdd is connected with electric capacity c7 and resistance r5, and the other end of electric capacity c7 is connected with the other end of resistance r5, pnp
The base stage of type audion q2 and the base stage of pnp audion q3, the emitter stage of pnp audion q2 is connected with high level vcc,
The colelctor electrode of pnp audion q2 is connected with the pin 1 of element u2 and the emitter stage of pnp audion q3, and pnp audion
The grounded collector of q3, the pin of element u2 is connected with electric capacity c8, the other end of electric capacity c8 be connected with resistance r6 first end and
Second end, and the other end ground connection of electric capacity c8, the three-terminal link of resistance r6 has the pin 3 of outfan vgl and element u2, element
U2 is integrated regulator, and model lm7810 of element u2, and resistance r2 and resistance r6 is swept resistance, and electric capacity c3 is electrolysis
Electric capacity, and diode d3 is Zener diode, the model of chip u1 adopts 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 provide input voltage for the regulating circuit that diode d4, electric capacity c5 and electric capacity c4 collectively constitute, and adjusts
The outfan of volt circuit be drive mu balanced circuit outfan avdd, this power driving circuit can also for resistance r3, electric capacity c2,
The first output circuit that diode d1, diode d2, electric capacity c1, resistance r1 and npn audion q1 collectively form provides input
Voltage, it is the outfan vgh driving mu balanced circuit that this first output circuit provides the outfan of input voltage, the first output simultaneously
Npn audion q1, resistance r1 on potential circuit and electric capacity c1 match, and npn audion q1, resistance r1 and electric capacity c1 can
So that voltage stabilizing process carried out to the outfan vgh driving mu balanced circuit, the outfan of regulating circuit can for pnp audion q2,
The second output circuit that pnp audion q3, electric capacity c7, resistance r5, element u2, resistance r6 and electric capacity c8 collectively constitute provides defeated
Enter 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 for driving the outfan vgl of mu balanced circuit to enter
Row voltage stabilizing is processed, the 3rd output that the outfan of regulating circuit can also collectively constitute to resistance r2, diode d3 and electric capacity c3
Circuit provides control source, 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 specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (5)
1. a kind of LCDs circuit voltage stabilizing device is it is characterised in that it includes housing, mu balanced circuit, change-over circuit, described
It is provided with mu balanced circuit, change-over circuit, the described mu balanced circuit one termination alternating current power supply other end connects change-over circuit, described in housing
Mu balanced circuit includes chip u1 and element u2, and the pin 5 of described chip u1 is connected with resistance r4, inductance l1, electric capacity c6 and height electricity
Flat vcc, the other end of described resistance r4 is connected with the pin 4 of chip u1, and the other end of described electric capacity c6 and chip u1 draw
Foot 2 is all grounded, and the pin 1 of described chip u1 is connected with the other end of inductance l1, the positive pole of diode d4 and electric capacity c2, described electricity
The other end holding c2 is connected with the negative pole of diode d2 and the positive pole of diode d1, and the positive pole of described diode d2 is connected with resistance
R3, and the other end ground connection of resistance r3, the negative pole of described diode d1 is connected with electric capacity c1, resistance r1 and npn audion q1
Emitter stage, the colelctor electrode of described npn audion q1 is connected with outfan vgh, the base stage of described npn audion q1, electricity
The other end of the other end of resistance r1 and electric capacity c1 is all grounded, and the negative pole of described diode d4 is connected with electric capacity c5, electric capacity c4, resistance
R2 and outfan avdd, the other end of described electric capacity c5 is connected with the pin 3 of chip u1, second end of described resistance r2 and defeated
Go out and hold avdd to be connected, and the three-terminal link of resistance r2 has the negative pole of diode d3, the positive pole of electric capacity c3 and outfan vcom,
And the other end of the negative pole of electric capacity c3, the positive pole of diode d3 and electric capacity c4 is all grounded, described outfan avdd is connected with electric capacity
C7 and resistance r5, and the other end of electric capacity c7 is connected with the other end of resistance r5, the base stage of pnp audion q2 and pnp three
The base stage of pole pipe q3, the emitter stage of described pnp audion q2 is connected with high level vcc, the current collection of described pnp audion q2
Pole is connected with the pin 1 of element u2 and the emitter stage of pnp audion q3, and the grounded collector of pnp audion q3, described
The pin of element u2 is connected with electric capacity c8, and the other end of described electric capacity c8 is connected with first end and second end of resistance r6, and electricity
Hold the other end ground connection of c8, the three-terminal link of described resistance r6 has the pin 3 of outfan vgl and element u2.
2. device according to claim 1 is it is characterised in that described element u2 is integrated regulator, and the type of element u2
Number be lm7810.
3. device according to claim 1 is it is characterised in that described resistance r2 and resistance r6 is swept resistance.
4. it is characterised in that described electric capacity c3 is electrochemical capacitor, and diode d3 is steady to device according to claim 1
Pressure diode.
5. device according to claim 1 is it is characterised in that the model of described chip u1 adopts lm27313.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753580.0A CN106340276A (en) | 2016-08-29 | 2016-08-29 | Circuit voltage stabilizer of liquid crystal display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753580.0A CN106340276A (en) | 2016-08-29 | 2016-08-29 | Circuit voltage stabilizer of liquid crystal display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106340276A true CN106340276A (en) | 2017-01-18 |
Family
ID=57823117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610753580.0A Pending CN106340276A (en) | 2016-08-29 | 2016-08-29 | Circuit voltage stabilizer of liquid crystal display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106340276A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1014258A (en) * | 1996-06-27 | 1998-01-16 | Matsushita Electric Works Ltd | Power converter |
| CN2593256Y (en) * | 2002-12-10 | 2003-12-17 | 许芸 | Computer protective power source of AC-DC input |
| JP2009300726A (en) * | 2008-06-13 | 2009-12-24 | Funai Electric Co Ltd | Liquid crystal backlight device |
| CN102543020A (en) * | 2010-12-29 | 2012-07-04 | 乐金显示有限公司 | DC-DC converter for liquid crystal display device |
| CN202632724U (en) * | 2012-05-07 | 2012-12-26 | 安徽状元郎电子科技有限公司 | LCD backlight driving module in learning machine circuit |
-
2016
- 2016-08-29 CN CN201610753580.0A patent/CN106340276A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1014258A (en) * | 1996-06-27 | 1998-01-16 | Matsushita Electric Works Ltd | Power converter |
| CN2593256Y (en) * | 2002-12-10 | 2003-12-17 | 许芸 | Computer protective power source of AC-DC input |
| JP2009300726A (en) * | 2008-06-13 | 2009-12-24 | Funai Electric Co Ltd | Liquid crystal backlight device |
| CN102543020A (en) * | 2010-12-29 | 2012-07-04 | 乐金显示有限公司 | DC-DC converter for liquid crystal display device |
| CN202632724U (en) * | 2012-05-07 | 2012-12-26 | 安徽状元郎电子科技有限公司 | LCD backlight driving module in learning machine circuit |
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Application publication date: 20170118 |
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| WD01 | Invention patent application deemed withdrawn after publication |