CN205539811U - TFT -LCD liquid crystal display panel's intelligent discharge circuit - Google Patents
TFT -LCD liquid crystal display panel's intelligent discharge circuit Download PDFInfo
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- CN205539811U CN205539811U CN201620053599.XU CN201620053599U CN205539811U CN 205539811 U CN205539811 U CN 205539811U CN 201620053599 U CN201620053599 U CN 201620053599U CN 205539811 U CN205539811 U CN 205539811U
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Abstract
The utility model discloses a TFT -LCD liquid crystal display panel's intelligent discharge circuit, a serial communication port, including being used for power supply chip RT9703GS, MOS pipe and the 2nd MOS pipe for the TFT -LCD liquid crystal display panel power supply, RT9703GS's messenger can hold the EN pin to link to each other with the G utmost point of MOS pipe, TFT -LCD liquid crystal display panel's switch circuit respectively, the S utmost point ground connection and the D of MOS pipe extremely link to each other with the 5V power through resistance R76, the G utmost point of the 2nd MOS pipe is extremely continuous with the D that a MOS managed, and the S utmost point ground connection and the D of the 2nd MOS pipe extremely link to each other with TFT -LCD liquid crystal display panel's 5V power pin through resistance R37833, and two VOUT pins of RT9703GS are continuous with TFT -LCD liquid crystal display panel's 5V power pin, through voltage stabilizing circuit ground connection behind two VOUT pin short circuits of RT9703GS. Quick discharging can be realized, more net electric current is provided.
Description
Technical field
This utility model relates to the Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel.
Background technology
TFT-LCD liquid crystal panel, its LVDS bus (Low-Voltage Differential Signaling, LVDS:
Low-voltage differential signal) electricity consumption have very strict requirement, firstly, it is necessary to provide purer electricity
Stream, secondly, has strict powering on and power-off sequential, wherein, the most troublesome sequential that is powered off, needs
Quickly electric discharge, the most not can exceed that 150ms discharge time, otherwise there will be white screen or the problem of flower screen.
Reference circuit figure that manufacturer is given as it is shown in figure 1, as we know from the figure reference line very simple, accordingly
, the electric current of generation and discharge time do not reach preferable effect.In order to meet the requirement of net current, one
As can provide more electric capacity of voltage regulation at outfan, bulky capacitor brings after providing good voltage regulation filtering effect
Side effect be exactly that+5V_LCD electric discharge is too slow, white screen or the phenomenon of flower screen easily occur.
Summary of the invention
For the problems referred to above, this utility model provides the Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel,
Can realize quickly discharging, it is provided that the purest electric current.
For realizing above-mentioned technical purpose, reaching above-mentioned technique effect, this utility model is by the following technical programs
Realize:
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel, it is characterised in that include for for TFT-LCD
Power supply chip RT9703GS, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor that liquid crystal panel is powered, described
The Enable Pin EN pin of RT9703GS respectively with the G pole of the first metal-oxide-semiconductor, TFT-LCD liquid crystal panel
On-off circuit is connected, and the S pole ground connection of described first metal-oxide-semiconductor and D pole are by resistance R76 and 5V power supply phase
Even, the G pole of described second metal-oxide-semiconductor is extremely connected with the D of the first metal-oxide-semiconductor, the S pole of the second metal-oxide-semiconductor
Ground connection and D pole are connected by the 5V power pin of resistance R37833 and TFT-LCD liquid crystal panel,
Two VOUT pins of RT9703GS are connected with the 5V power pin of TFT-LCD liquid crystal panel,
By mu balanced circuit ground connection after two VOUT pin short circuits of RT9703GS.
Preferably, described mu balanced circuit is composed in parallel by several identical capacitors.
Preferably, the FLG# pin of RT9703GS is connected by resistance R37815 and 5V power supply, RT9703GS
Two VIN pins be connected with 5V power supply and by capacity earth, the IP pin of RT9703GS is by electricity
Resistance R37803 ground connection.
Preferably, the Enable Pin EN pin of RT9703GS passes through resistance R37806 and the G of the first metal-oxide-semiconductor
The most connected, ground connection after G pole series resistance R75 of the first metal-oxide-semiconductor, electric capacity C941109, simultaneously first
Diode D4503 that the G pole of metal-oxide-semiconductor connects in parallel and resistance R74 and south bridge control chip
LCD_VDD_EN_PCH pin is connected, after LCD_VDD_EN_PCH pin series resistance R60209
Being connected with the LCD_VDD_EN_EC pin of EC chip, resistance R87 is passed through in the G pole of the first metal-oxide-semiconductor
It is connected with 3V power supply.
Utilize the enable control signal+5V_LCD_EN of+5V_LCD, change through the first metal-oxide-semiconductor,
Again with the second metal-oxide-semiconductor as discharge switch, make a concrete analysis of as follows:
As+5V_LCD_EN=H, RT9703GS powers, the G pole=H of the first metal-oxide-semiconductor, and first
Metal-oxide-semiconductor turns on, the G pole=L of on-off control the second metal-oxide-semiconductor, the second metal-oxide-semiconductor cut-off ,+5V_LCD
Normally export electric current；
As+5V_LCD_EN=L, RT9703GS stops power supply, the G pole=L of the first metal-oxide-semiconductor,
First metal-oxide-semiconductor cut-off, the G pole of on-off control the second metal-oxide-semiconductor is then connected to+5VSB=H by R76,
Second metal-oxide-semiconductor conducting ,+5V_LCD passes through R37833 ground connection, after+5V_LCD power-off inside electric capacity
The electric current stored quickly can discharge into ground through R37833.
Meanwhile, by mu balanced circuit ground connection after two VOUT pin short circuits of RT9703GS, it is provided that good
Voltage regulation filtering effect, it is provided that relatively purer electric current.
The beneficial effects of the utility model are: the Intelligent discharge circuit of TFT-LCD liquid crystal panel both can realize
Quickly electric discharge, it is also possible to purer electric current is provided, it is to avoid TFT-LCD liquid crystal panel occur white screen or
Person spends the phenomenon of screen.
Accompanying drawing explanation
The reference circuit figure that Tu1Shi this utility model manufacturer is given；
Fig. 2 is the Intelligent discharge circuit diagram of this utility model a kind of TFT-LCD liquid crystal panel.
Detailed description of the invention
Make further to retouch in detail to technical solutions of the utility model with specific embodiment below in conjunction with the accompanying drawings
State, so that those skilled in the art can be better understood from this utility model and can be practiced, but lifted
Embodiment is not as to restriction of the present utility model.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel, as in figure 2 it is shown, include for for TFT-LCD
Power supply chip RT9703GS, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor that liquid crystal panel is powered, wherein, excellent
Selecting the first metal-oxide-semiconductor and the second metal-oxide-semiconductor is N-type metal-oxide-semiconductor, and the model used in Fig. 2 is 2N7002,
It has three pins, is respectively as follows: source S, drain D, grid G.RT9703GS is a kind of power supply chip,
Have 8 pins, be respectively as follows: 1 FLG# pin, 2 VOUT pins, 2 VIN pins, 1
Individual GND pin, 1 EN pin and 1 IP pin.
The Enable Pin EN pin of described RT9703GS respectively with the G pole of the first metal-oxide-semiconductor (i.e. Q9375),
The on-off circuit of TFT-LCD liquid crystal panel is connected, and S pole ground connection and the D pole of described first metal-oxide-semiconductor are passed through
Resistance R76 and 5V power supply is connected, the G pole of described second metal-oxide-semiconductor (i.e. Q9378) and a MOS
The D of pipe is the most connected, and the S pole ground connection of the second metal-oxide-semiconductor and D pole are by resistance R37833 and TFT-LCD
The 5V power pin of liquid crystal panel is connected, two VOUT pins of RT9703GS (i.e. VOUT1 and
VOUT2) it is connected with the 5V power pin of TFT-LCD liquid crystal panel, two VOUT of RT9703GS
By mu balanced circuit ground connection after pin short circuit.
Described mu balanced circuit is composed in parallel by several identical capacitors, it is provided that good voltage regulation filtering effect,
Purer electric current is provided.In Fig. 2, mu balanced circuit includes three identical electric capacity of voltage regulation LVC2, LVC3
And LVC4, the capacitance/rated voltage of each electric capacity is: 47 microfarad/6.3 volt.
Preferably, the FLG# pin of RT9703GS is connected by resistance R37815 and 5V power supply, RT9703GS
Two VIN pins (i.e. VIN1 with VIN2) be connected with 5V power supply and by electric capacity PC72 and PC73
Ground connection, the IP pin of RT9703GS passes through resistance R37803 ground connection.The Enable Pin EN pipe of RT9703GS
Foot is the most connected by the G of resistance R37806 and the first metal-oxide-semiconductor, the G pole series resistance of the first metal-oxide-semiconductor
Ground connection after R75, electric capacity C941109, the diode that the G pole of the first metal-oxide-semiconductor connects in parallel simultaneously
D4503 and resistance R74 is connected with the LCD_VDD_EN_PCH pin of south bridge control chip,
With the LCD_VDD_EN_EC of EC chip after LCD_VDD_EN_PCH pin series resistance R60209
Pin is connected, and the G pole of the first metal-oxide-semiconductor is connected by resistance R87 and 3V power supply.Wherein,
LCD_VDD_EN_EC and LCD_VDD_EN_PCH is two control signals, (many respectively from EC
Function programmable control chip) and some pin of PCH (INTEL south bridge), mainly by PCH south
Bridge is controlling.The 0ohm R60209NI of EC control signal is not go up part, is off, and is as separately
Reserving of an outer control signal.
The preferred parameter of each electronic devices and components is referred to shown in Fig. 2, wherein, resistance R37806 and
R60209 is 0Ohm, utilizes the enable control signal+5V_LCD_EN of+5V_LCD, through a MOS
Pipe is changed, then with the second metal-oxide-semiconductor as discharge switch.Detailed operation principle is carried out below in conjunction with Fig. 2
Describe.
When+5V_LCD_EN=H when, RT9703GS powers, the G pole of Q9375=H, Q9375
Conducting, the G pole of on-off control N-MOS Q9378=L, Q9378 cut-off；+ 5V_LCD normally exports
Electric current；
When+5V_LCD_EN=L when, RT9703GS stops power supply；The G pole of Q9375=L, Q9375
Cut-off, the G pole of on-off control N-MOS Q9378 is then connected to+5VSB=H, Q9378 by R76 10K
Conducting ,+5V_LCD passes through R37833 330ohm ground connection, stores after+5V_LCD power-off inside electric capacity
Electric current quickly can discharge into ground through R37833.
The Intelligent discharge circuit of TFT-LCD liquid crystal panel both can realize quickly discharging, it is also possible to provides ratio
Purer electric current, it is to avoid white screen or the phenomenon of flower screen occurs in TFT-LCD liquid crystal panel.
These are only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every equivalent structure utilizing this utility model description and accompanying drawing content to be made or equivalence flow process conversion, or
Person is directly or indirectly used in the technical field that other are relevant, is the most in like manner included in patent of the present utility model and protects
In the range of protecting.
Claims (7)
1. the Intelligent discharge circuit of a TFT-LCD liquid crystal panel, it is characterised in that include for for TFT-LCD
Power supply chip RT9703GS, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor that liquid crystal panel is powered, described
The Enable Pin EN pin of RT9703GS respectively with G pole, the TFT-LCD liquid crystal surface of the first metal-oxide-semiconductor
The on-off circuit of plate is connected, and the S pole ground connection of described first metal-oxide-semiconductor and D pole are by resistance R76 and 5V
Power supply is connected, and the G pole of described second metal-oxide-semiconductor is extremely connected with the D of the first metal-oxide-semiconductor, the 2nd MOS
The S pole ground connection of pipe and the D pole 5V power pin by resistance R37833 with TFT-LCD liquid crystal panel
It is connected, two VOUT pins of RT9703GS and the 5V power pin phase of TFT-LCD liquid crystal panel
Even, by mu balanced circuit ground connection after two VOUT pin short circuits of RT9703GS.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel the most according to claim 1, its feature exists
In, described mu balanced circuit is composed in parallel by several identical capacitors.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel the most according to claim 1, its feature exists
In, the FLG# pin of RT9703GS is connected by resistance R37815 and 5V power supply, RT9703GS
Two VIN pins be connected with 5V power supply and by capacity earth, the IP pin of RT9703GS passes through
Resistance R37803 ground connection.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel the most according to claim 3, its feature exists
In, the Enable Pin EN pin of RT9703GS passes through resistance R37806 and the G pole phase of the first metal-oxide-semiconductor
Even, ground connection after G pole series resistance R75 of the first metal-oxide-semiconductor, electric capacity C941109, simultaneously first
Diode D4503 that the G pole of metal-oxide-semiconductor connects in parallel and resistance R74 and south bridge control chip
LCD_VDD_EN_PCH pin is connected, LCD_VDD_EN_PCH pin series resistance R60209
Being connected with the LCD_VDD_EN_EC pin of EC chip afterwards, the G pole of the first metal-oxide-semiconductor is by electricity
Resistance R87 with 3V power supply is connected.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel the most according to claim 1, its feature exists
In, the model of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor is 2N7002.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel the most according to claim 2, its feature exists
In, described mu balanced circuit includes three identical electric capacity of voltage regulation, and the capacitance/rated voltage of each electric capacity is:
47 microfarad/6.3 volt.
The Intelligent discharge circuit of a kind of TFT-LCD liquid crystal panel the most according to claim 4, its feature exists
In, resistance R37806 and R60209 is 0Ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053599.XU CN205539811U (en) | 2016-01-20 | 2016-01-20 | TFT -LCD liquid crystal display panel's intelligent discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053599.XU CN205539811U (en) | 2016-01-20 | 2016-01-20 | TFT -LCD liquid crystal display panel's intelligent discharge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539811U true CN205539811U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620053599.XU Expired - Fee Related CN205539811U (en) | 2016-01-20 | 2016-01-20 | TFT -LCD liquid crystal display panel's intelligent discharge circuit |
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| CN (1) | CN205539811U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425440A (en) * | 2016-01-20 | 2016-03-23 | 苏州农业职业技术学院 | Intelligent discharging circuit of TFT-LCD (thin film transistor-liquid crystal display) liquid crystal panel |
-
2016
- 2016-01-20 CN CN201620053599.XU patent/CN205539811U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425440A (en) * | 2016-01-20 | 2016-03-23 | 苏州农业职业技术学院 | Intelligent discharging circuit of TFT-LCD (thin film transistor-liquid crystal display) liquid crystal panel |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |