CN204315212U - A kind of liquid crystal display module drives mu balanced circuit - Google Patents
A kind of liquid crystal display module drives mu balanced circuit Download PDFInfo
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- CN204315212U CN204315212U CN201420743764.5U CN201420743764U CN204315212U CN 204315212 U CN204315212 U CN 204315212U CN 201420743764 U CN201420743764 U CN 201420743764U CN 204315212 U CN204315212 U CN 204315212U
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- electric capacity
- voltage output
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 29
- 239000010409 thin film Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- Liquid Crystal Display Device Control (AREA)
Abstract
The utility model discloses a kind of liquid crystal display module and drive mu balanced circuit, the first voltage output module, the second voltage output module and the tertiary voltage output module that comprise analog power module, be connected respectively with described analog power module, wherein, described analog power module comprises switching power source chip, the first regulating circuit, the first diode D
1, the first inductance L
1, the first resistance R
1, power voltage input terminal, described first regulating circuit respectively with described first diode D
1negative electrode, described switching power source chip feedback test side connect, described first regulating circuit is also connected with described second voltage output module.Liquid crystal display module described in the utility model drives mu balanced circuit to adopt power switch chip, power switch chip is connected to respectively the first voltage output module, the second voltage output module, tertiary voltage output module, circuit structure is simple, and stability is high, compatible good.
Description
Technical field
The utility model relates to a kind of LCDs driving circuit, particularly relates to a kind of liquid crystal display module and drives mu balanced circuit.
Background technology
The control of liquid crystal display luminous point display duration relies on picture element signal by a Switch Controller capacitor charging, and the electric field relying on capacitance voltage to be formed controls the distortion of liquid crystal molecule again, and namely capacitance voltage maintains to make bright spot luminous for a long time for a long time.In control, each is provided with thin film field-effect switching tube by the electric field of the luminous point of pixel, carries out high frequency discharge and recharge, to realize liquid crystal display displays images signal to electric capacity.
Each field duration, TFT (Thin Film Transistor: thin film transistor (TFT)) will open once, to carry out a discharge and recharge to electric capacity.Wherein, the voltage opening TFT is VGH voltage output end, and the voltage of closing TFT is VGL voltage output end.And AVDD, VGH, VGL, VCOM (the common port voltage of liquid crystal deflecting element) drive several groups of very important voltages for TFT digital screen, because starting material or production method produce voltage deviation, approximate range is as follows: AVDD voltage at+9V-~+11V, VGH voltage at+14V-~+19V, VGL voltage at-10V-~-5V, VCOM voltage at+3V-~+6V.
At present, most of liquid crystal display module drives the input voltage of mu balanced circuit to be 3.3V, and output voltage is respectively VGH=15V, VGL=-10V, AVDD=10V.It needs pulse generation chip and field effect transistor, 3.3V direct current is become alternating current rectification stable output voltage AVDD again, and then utilizes the mode of voltage multiplying rectifier to realize VGH to open and close with VGL.This way of output voltage stability is not high, and is not easy to control, poor compatibility, and needs other stabilized voltage supply to coordinate realization, considerably increases cost.
Utility model content
Based on this, the utility model is the defect overcoming prior art, provides the liquid crystal display module that a kind of stability is high, compatible good to drive mu balanced circuit.
Its technical scheme is as follows: a kind of liquid crystal display module drives mu balanced circuit, the first voltage output module, the second voltage output module and the tertiary voltage output module that comprise analog power module, are connected with described analog power module, wherein, described analog power module comprises switching power source chip, the first regulating circuit, the first diode D
1, the first inductance L
1, the first resistance R
1, power voltage input terminal, the input end of described switching power source chip is electrically connected with described power voltage input terminal, is connected with described first resistance R between the input end of described switching power source chip and the Enable Pin of described switching power source chip
1, between the input end of described switching power source chip and the pulsewidth output terminal of described switching power source chip, be connected with described first inductance L
1, the pulsewidth output terminal of described switching power source chip is electrically connected described second voltage output module, tertiary voltage output module respectively, the pulsewidth output terminal of described switching power source chip and described first diode D
1anode connect, described first diode D
1negative electrode be connected with described first voltage output module, described first regulating circuit respectively with described first diode D
1negative electrode, described switching power source chip feedback test side connect, described first regulating circuit is also connected with described second voltage output module.
Below technical scheme is further illustrated:
Wherein in an embodiment, described first regulating circuit comprises the second resistance R connected successively
2, the 3rd resistance R
3, the 4th resistance R
4, described second resistance R
2ground connection, described 4th resistance R
4be connected with described second voltage output module, the feedback test side of described switching power source chip is connected to described 3rd resistance R
3, the 4th resistance R
4between.
Wherein in an embodiment, described 4th resistance R
4be parallel with the first electric capacity C
1, described first regulating circuit is parallel with the second electric capacity C
2, described power voltage input terminal is by the 3rd electric capacity C
3ground connection.
Wherein in an embodiment, described first voltage output module comprises the second regulating circuit, and described second regulating circuit comprises the 5th resistance R
5, the 6th resistance R
6, the 7th resistance R
7and adjustable resistance VR
1, described adjustable resistance VR
1two ends connect described 5th resistance R respectively
5, the 7th resistance R
7, described adjustable resistance VR
1slip variable resistance end by described 6th resistance R
6with described 7th resistance R
7be connected, described 7th resistance R
7ground connection, described 5th resistance R
5with described first diode D
1negative electrode be connected, the output terminal of described first voltage output module is connected to described 6th resistance R
6with described 7th resistance R
7between.
Wherein in an embodiment, described 7th resistance R
7be parallel with the 4th electric capacity C
4, described 5th resistance R
5with described first diode D
1negative electrode jointly connect the 5th electric capacity C
5one end, described 5th electric capacity C
5other end ground connection.
Wherein in an embodiment, described second voltage output module comprises the second diode D
2, the 3rd diode D
3, the first stabilivolt D
6, the 8th resistance R
8, the first triode Q
1, described second diode D
2anode be connected with described first regulating circuit, described second diode D
2negative electrode and described 3rd diode D
3anode be connected, the pulsewidth output terminal of described switching power source chip is connected to described second diode D
2negative electrode and described 3rd diode D
3anode between;
Described 3rd diode D
3negative electrode and described first triode Q
1collector be connected, described first triode Q
1collector and described first triode Q
1base stage between be connected with described 8th resistance R
8, described first triode Q
1emitter be connected to the output terminal of described second voltage output module, described first triode Q
1base stage and described first stabilivolt D
6negative electrode be connected, described first stabilivolt D
6plus earth.
Wherein in an embodiment, the output terminal of described second voltage output module and described first triode Q
1base stage between be connected with the 6th electric capacity C
6, described first triode Q
1collector and described first stabilivolt D
6anode between be connected with the 7th electric capacity C
7, also comprise the 8th electric capacity C
8, described 8th electric capacity C
8one end be connected to described second diode D
2, the 3rd diode D
3between, described 8th electric capacity C
8the other end connect the pulsewidth output terminal of described switching power source chip.
Wherein in an embodiment, described tertiary voltage output module comprises the 4th diode D
4, the 5th diode D
5, the second stabilivolt D
7, the 9th resistance R
9, the second triode Q
2, the pulsewidth output terminal of described switching power source chip is connected to described 4th diode D
4, the 5th diode D
5between;
Described 4th diode D
4negative electrode and described 5th diode D
5anode be connected, described 5th diode D
5plus earth, described 4th diode D
4anode and described second triode Q
2collector connect, described second triode Q
2collector and described second triode Q
2base stage between be connected with described 9th resistance R
9, described second stabilivolt D
7anode and described second triode Q
2base stage connect, described second stabilivolt D
7plus earth, described second triode Q
2emitter be connected to the output terminal of tertiary voltage output module.
Wherein in an embodiment, also comprise the 9th electric capacity C
9, the tenth electric capacity C
10, the 11 electric capacity C
11, described 9th electric capacity C
9one end is connected with the pulsewidth output terminal of described switching power source chip, described 9th electric capacity C
9the other end is connected to described 4th diode D
4, the 5th diode D
5between, described tenth electric capacity C
10one end and described second triode Q
2collector be connected, described tenth electric capacity C
10other end ground connection, described second triode Q
2emitter and described second triode Q
2base stage between be connected with described 11 electric capacity C
11.
Wherein in an embodiment, described switching power source chip is LM27313 model.
Below the principle, effect etc. of preceding solution are described:
Liquid crystal display module described in the utility model drives mu balanced circuit to adopt power switch chip, power switch chip is connected the first voltage output module, the second voltage output module, tertiary voltage output module, and the voltage of the first regulating circuit adjustment AVDD end output is set, by controlling the output voltage size of the first voltage output module to the 3rd output module, liquid crystal display module is driven to close, open or show.Visible, the utility model circuit structure is simple, and stability is high, compatible good.
Accompanying drawing explanation
Fig. 1 is that liquid crystal display module described in the utility model embodiment drives voltage regulator circuit structure figure.
Description of reference numerals:
10, analog power module, the 20, first voltage output module, the 30, second voltage output module, 40, tertiary voltage output module.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail:
As shown in Figure 1, liquid crystal display module described in the utility model drives mu balanced circuit, the first voltage output module 20, second voltage output module 30 and the tertiary voltage output module 40 comprising analog power module 10, be connected respectively with described analog power module 10.Wherein, described analog power module 10 comprises switching power source chip, the first regulating circuit, the first diode D
1, the first inductance L
1, the first resistance R
1, power voltage input terminal, in the utility model embodiment, described switching power source chip is LM27313 model, and power input voltage is+5v.The input end of described switching power source chip is electrically connected with described power voltage input terminal, is connected with described first resistance R between the input end of described switching power source chip and the Enable Pin of described switching power source chip
1, between the input end of described switching power source chip and the pulsewidth output terminal of described switching power source chip, be connected with described first inductance L
1, the pulsewidth output terminal of described switching power source chip is electrically connected described second voltage output module 30, tertiary voltage output module 40 respectively, the pulsewidth output terminal of described switching power source chip and described first diode D
1anode connect.Described first diode D
1negative electrode be connected with described first voltage output module 20, described first regulating circuit respectively with described first diode D
1negative electrode, described switching power source chip feedback test side connect, described first regulating circuit is also connected with described second voltage output module 30.
Liquid crystal display module described in the utility model drives mu balanced circuit to adopt power switch chip, power switch chip is connected to respectively the first voltage output module 20, second voltage output module 30, tertiary voltage output module 40, and the voltage of the first regulating circuit adjustment AVDD end output is set, by controlling the output voltage size of the first voltage output module 20 to the 3rd output module, liquid crystal display module is driven to close, open or show.Visible, the utility model circuit structure is simple, and stability is high, compatible good.
Wherein, described first regulating circuit comprises the second resistance R connected successively
2, the 3rd resistance R
3, the 4th resistance R
4, described second resistance R
2ground connection, described 4th resistance R
4be connected with described second voltage output module 30, the feedback test side of described switching power source chip is connected to described 3rd resistance R
3, the 4th resistance R
4between.By adjusting the second resistance R
2, the 3rd resistance R
3, the 4th resistance R
4resistance value and adjustable AVDD end output voltage, improve circuit compatibility.
Described 4th resistance R
4be parallel with the first electric capacity C
1, described first regulating circuit is parallel with the second electric capacity C
2, described power voltage input terminal is by the 3rd electric capacity C
3ground connection.By the first electric capacity C
1, the second electric capacity C
2and the 3rd electric capacity C
3filter action, makes circuit more stable.
Described first voltage output module 20 comprises the second regulating circuit, and described second regulating circuit comprises the 5th resistance R
5, the 6th resistance R
6, the 7th resistance R
7and adjustable resistance VR
1, described adjustable resistance VR
1two ends connect described 5th resistance R respectively
5, the 7th resistance R
7, described adjustable resistance VR
1slip variable resistance end by described 6th resistance R
6with described 7th resistance R
7be connected, described 7th resistance R
7ground connection, described 5th resistance R
5with described first diode D
1negative electrode be connected, the output terminal of described first voltage output module 20 is connected to described 6th resistance R
6with described 7th resistance R
7between.By changing adjustable resistance VR
1, the output terminal VCOM size of the first voltage output module can be adjusted in real time.
Described 7th resistance R
7be parallel with the 4th electric capacity C
4, described 5th resistance R
5with described first diode D
1negative electrode jointly connect the 5th electric capacity C
5one end, described 5th electric capacity C
5other end ground connection.
Described second voltage output module 30 comprises the second diode D
2, the 3rd diode D
3, the first stabilivolt D
6, the 8th resistance R
8, the first triode Q
1, described second diode D
2anode be connected with described first regulating circuit, described second diode D
2negative electrode and described 3rd diode D
3anode be connected, the pulsewidth output terminal of described switching power source chip is connected to described second diode D
2negative electrode and described 3rd diode D
3anode between.Described 3rd diode D
3negative electrode and described first triode Q
1collector be connected, described first triode Q
1collector and described first triode Q
1base stage between be connected with described 8th resistance R
8, described first triode Q
1emitter be connected to the output terminal of described second voltage output module 30, described first triode Q
1base stage and described first stabilivolt D
6negative electrode be connected, described first stabilivolt D
6plus earth.
The output terminal of described second voltage output module 30 and described first triode Q
1base stage between be connected with the 6th electric capacity C
6, described first triode Q
1collector and described first stabilivolt D
6anode between be connected with the 7th electric capacity C
7.Described second voltage output module 30 also comprises the 8th electric capacity C
8, described 8th electric capacity C
8one end be connected to described second diode D
2, the 3rd diode D
3between, described 8th electric capacity C
8the other end connect the pulsewidth output terminal of described switching power source chip.
Described tertiary voltage output module 40 comprises the 4th diode D
4, the 5th diode D
5, the second stabilivolt D
7, the 9th resistance R
9, the second triode Q
2, the pulsewidth output terminal of described switching power source chip is connected to described 4th diode D
4, the 5th diode D
5between.Described 4th diode D
4negative electrode and described 5th diode D
5anode be connected, described 5th diode D
5plus earth, described 4th diode D
4anode and described second triode Q
2collector connect, described second triode Q
2collector and described second triode Q
2base stage between be connected with described 9th resistance R
9, described second stabilivolt D
7anode and described second triode Q
2base stage connect, described second stabilivolt D
7plus earth, described second triode Q
2emitter be connected to the output terminal of tertiary voltage output module 40.
Described tertiary voltage output module 40 also comprises the 9th electric capacity C
9, the tenth electric capacity C
10, the 11 electric capacity C
11, described 9th electric capacity C
9one end is connected with the pulsewidth output terminal of described switching power source chip, described 9th electric capacity C
9the other end is connected to described 4th diode D
4, the 5th diode D
5between.Described tenth electric capacity C
10one end and described second triode Q
2collector be connected, described tenth electric capacity C
10other end ground connection, described second triode Q
2emitter and described second triode Q
2base stage between be connected with described 11 electric capacity C
11.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (10)
1. a liquid crystal display module drives mu balanced circuit, it is characterized in that, the first voltage output module, the second voltage output module and the tertiary voltage output module that comprise analog power module, are connected with described analog power module, wherein, described analog power module comprises switching power source chip, the first regulating circuit, the first diode D
1, the first inductance L
1, the first resistance R
1, power voltage input terminal, the input end of described switching power source chip is electrically connected with described power voltage input terminal, is connected with described first resistance R between the input end of described switching power source chip and the Enable Pin of described switching power source chip
1, between the input end of described switching power source chip and the pulsewidth output terminal of described switching power source chip, be connected with described first inductance L
1, the pulsewidth output terminal of described switching power source chip is electrically connected described second voltage output module, tertiary voltage output module respectively, the pulsewidth output terminal of described switching power source chip and described first diode D
1anode connect, described first diode D
1negative electrode be connected with described first voltage output module, described first regulating circuit respectively with described first diode D
1negative electrode, described switching power source chip feedback test side connect, described first regulating circuit is also connected with described second voltage output module.
2. liquid crystal display module according to claim 1 drives mu balanced circuit, and it is characterized in that, described first regulating circuit comprises the second resistance R connected successively
2, the 3rd resistance R
3, the 4th resistance R
4, described second resistance R
2ground connection, described 4th resistance R
4be connected with described second voltage output module, the feedback test side of described switching power source chip is connected to described 3rd resistance R
3, the 4th resistance R
4between.
3. liquid crystal display module according to claim 2 drives mu balanced circuit, it is characterized in that, described 4th resistance R
4be parallel with the first electric capacity C
1, described first regulating circuit is parallel with the second electric capacity C
2, described power voltage input terminal is by the 3rd electric capacity C
3ground connection.
4. the liquid crystal display module according to any one of claims 1 to 3 drives mu balanced circuit, and it is characterized in that, described first voltage output module comprises the second regulating circuit, and described second regulating circuit comprises the 5th resistance R
5, the 6th resistance R
6, the 7th resistance R
7and adjustable resistance VR
1, described adjustable resistance VR
1two ends connect described 5th resistance R respectively
5, the 7th resistance R
7, described adjustable resistance VR
1slip variable resistance end by described 6th resistance R
6with described 7th resistance R
7be connected, described 7th resistance R
7ground connection, described 5th resistance R
5with described first diode D
1negative electrode be connected, the output terminal of described first voltage output module is connected to described 6th resistance R
6with described 7th resistance R
7between.
5. liquid crystal display module according to claim 4 drives mu balanced circuit, it is characterized in that, described 7th resistance R
7be parallel with the 4th electric capacity C
4, described 5th resistance R
5with described first diode D
1negative electrode jointly connect the 5th electric capacity C
5one end, described 5th electric capacity C
5other end ground connection.
6. the liquid crystal display module according to any one of claims 1 to 3 drives mu balanced circuit, and it is characterized in that, described second voltage output module comprises the second diode D
2, the 3rd diode D
3, the first stabilivolt D
6, the 8th resistance R
8, the first triode Q
1, described second diode D
2anode be connected with described first regulating circuit, described second diode D
2negative electrode and described 3rd diode D
3anode be connected, the pulsewidth output terminal of described switching power source chip is connected to described second diode D
2negative electrode and described 3rd diode D
3anode between;
Described 3rd diode D
3negative electrode and described first triode Q
1collector be connected, described first triode Q
1collector and described first triode Q
1base stage between be connected with described 8th resistance R
8, described first triode Q
1emitter be connected to the output terminal of described second voltage output module, described first triode Q
1base stage and described first stabilivolt D
6negative electrode be connected, described first stabilivolt D
6plus earth.
7. liquid crystal display module according to claim 6 drives mu balanced circuit, it is characterized in that, the output terminal of described second voltage output module and described first triode Q
1base stage between be connected with the 6th electric capacity C
6, described first triode Q
1collector and described first stabilivolt D
6anode between be connected with the 7th electric capacity C
7, also comprise the 8th electric capacity C
8, described 8th electric capacity C
8one end be connected to described second diode D
2, the 3rd diode D
3between, described 8th electric capacity C
8the other end connect the pulsewidth output terminal of described switching power source chip.
8. the liquid crystal display module according to any one of claims 1 to 3 drives mu balanced circuit, and it is characterized in that, described tertiary voltage output module comprises the 4th diode D
4, the 5th diode D
5, the second stabilivolt D
7, the 9th resistance R
9, the second triode Q
2, the pulsewidth output terminal of described switching power source chip is connected to described 4th diode D
4, the 5th diode D
5between;
Described 4th diode D
4negative electrode and described 5th diode D
5anode be connected, described 5th diode D
5plus earth, described 4th diode D
4anode and described second triode Q
2collector connect, described second triode Q
2collector and described second triode Q
2base stage between be connected with described 9th resistance R
9, described second stabilivolt D
7anode and described second triode Q
2base stage connect, described second stabilivolt D
7plus earth, described second triode Q
2emitter be connected to the output terminal of tertiary voltage output module.
9. liquid crystal display module according to claim 8 drives mu balanced circuit, it is characterized in that, also comprises the 9th electric capacity C
9, the tenth electric capacity C
10, the 11 electric capacity C
11, described 9th electric capacity C
9one end is connected with the pulsewidth output terminal of described switching power source chip, described 9th electric capacity C
9the other end is connected to described 4th diode D
4, the 5th diode D
5between, described tenth electric capacity C
10one end and described second triode Q
2collector be connected, described tenth electric capacity C
10other end ground connection, described second triode Q
2emitter and described second triode Q
2base stage between be connected with described 11 electric capacity C
11.
10. liquid crystal display module according to claim 1 drives mu balanced circuit, and it is characterized in that, described switching power source chip is LM27313 model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420743764.5U CN204315212U (en) | 2014-12-01 | 2014-12-01 | A kind of liquid crystal display module drives mu balanced circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420743764.5U CN204315212U (en) | 2014-12-01 | 2014-12-01 | A kind of liquid crystal display module drives mu balanced circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204315212U true CN204315212U (en) | 2015-05-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297695A (en) * | 2016-08-29 | 2017-01-04 | 合肥惠科金扬科技有限公司 | A kind of TFT LCD liquid crystal display screen delay circuit |
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2014
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297695A (en) * | 2016-08-29 | 2017-01-04 | 合肥惠科金扬科技有限公司 | A kind of TFT LCD liquid crystal display screen delay circuit |
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