CN109461422A - Discharge control circuit and display device - Google Patents
Discharge control circuit and display device Download PDFInfo
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- CN109461422A CN109461422A CN201811620197.3A CN201811620197A CN109461422A CN 109461422 A CN109461422 A CN 109461422A CN 201811620197 A CN201811620197 A CN 201811620197A CN 109461422 A CN109461422 A CN 109461422A
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- 238000001514 detection method Methods 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 102220055633 rs115640267 Human genes 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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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
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application relates to a discharge control circuit, wherein the discharge control circuit comprises a detection module, a switch module and a control module; the detection module is used for detecting the current of the load; the switch module is connected between the load and the ground; the control module is respectively connected with the detection module and the switch module and used for judging whether the current is smaller than a preset current or not and controlling the switch module to be conducted when the current is smaller than the preset current so as to control the load to discharge to the ground.
Description
Technical field
This application involves field of display technology, in particular to a kind of charge/discharge control circuit and display device.
Background technique
(Thin Film Transistor Liquid Crystal Display, tft liquid crystal are aobvious by TFT-LCD
Show device) it is one of the principal item that current flat panel is shown, have become modern IT, display platform important in video product.
The main driving principle of TFT-LCD is: R/G/B compressed signal, control signal and motherboard power supply are passed through wire rod and PCB by system board
Connector (connector) on plate is connected, and data are by TCON (Timing Controller, the timing control on pcb board
Device processed) integrated circuit (IC) processing after, through pcb board, pass through S-COF (Source-Chip on Film) and G-COF (Gate-
Chip on Film) it is connect with viewing area, so that LCD obtains required power supply, signal.
Liquid crystal display is controlled the deflection of liquid crystal by the voltage difference of two lateral electrode of liquid crystal display panel, and wherein the electrode of side is public affairs
Common electrode provides reference voltage for liquid crystal display panel, and the other side is pixel electrode.When public electrode is identical as the voltage of pixel electrode
When, the voltage difference of two lateral electrode of liquid crystal display panel is 0, and viewing area shows black.When liquid crystal display shuts down, the voltage of pixel electrode
It can be comparatively fast down to 0, and the velocity of discharge of public electrode is slower, and viewing area is caused to show abnormal picture.
Summary of the invention
Based on this, it is necessary to which when for liquid crystal display shutdown, the voltage of pixel electrode can comparatively fast be down to 0, and common electrical
The problem of velocity of discharge of pole is slower, and viewing area is caused to show abnormal picture provides a kind of charge/discharge control circuit and display device.
A kind of charge/discharge control circuit, the control of discharge include:
Detection module, for detecting the electric current of load；
Switch module is connected between the load and ground；And
Control module is connect with the detection module and the switch module respectively, for judging whether the electric current is small
In predetermined current, and when the electric current is less than predetermined current, the switch module conducting is controlled, to control the load over the ground
Electric discharge.
The detection module includes: in one of the embodiments,
Current follower, including the first pin, second pin, third pin and the 4th pin, first pin and master
The connection of plate power supply, the second pin and the load connect；
First resistor, the first end of the first resistor are connect with the third pin；
First power supply is connect with the second end of the first resistor；And
Second resistance, the first end of the second resistance are connect with the 4th pin and the control module respectively, institute
State the second end ground connection of second resistance.
The control module includes: in one of the embodiments,
Judging unit is connect with the first end of the second resistance, for judging whether the electric current is less than predetermined current,
And when the electric current is less than predetermined current, output control signal；And
Control unit is connect with the judging unit and the switch module respectively, for according to the control signal control
Make the switch module conducting.
The judging unit includes operational amplifier in one of the embodiments, the operational amplifier it is in the same direction defeated
Enter end to connect with the first end of the second resistance, the reverse input end of the operational amplifier is for receiving reference voltage, institute
The output end for stating operational amplifier is connect with described control unit.
Described control unit includes d type flip flop in one of the embodiments, the d type flip flop include first input end,
Second input terminal and the first output end；The first input end of the d type flip flop is connect with the output end of the operational amplifier, institute
The second input terminal of d type flip flop is stated for receiving high level signal, the first output end and the switch module of the d type flip flop
Connection；First output end of the d type flip flop is used to receive the operational amplifier when the first input end of the d type flip flop
Output end transmission failing edge when, receive the high level that the second input terminal of the d type flip flop is assigned to.
The switch module includes multiple electronic switches in one of the embodiments,；The first end of each electronic switch
It is connect with the first output end of the d type flip flop, the second end of each electronic switch and the load connect, each electronic switch
Third end ground connection.
The electronic switch is NMOS tube in one of the embodiments, and the first end of the electronic switch corresponds to NMOS
The grid of pipe, the second end of the electronic switch correspond to the drain electrode of NMOS tube, and the third end of the electronic switch corresponds to NMOS tube
Source electrode.
The detection module further includes capacitor in one of the embodiments, the first end of the capacitor and the electric current
The second pin of follower connects, the second end ground connection of the capacitor.
A kind of charge/discharge control circuit, the control of discharge include:
Detection module, for detecting the electric current of load；The detection module includes current follower, first resistor, first
Power supply and second resistance；The current follower includes the first pin, second pin, third pin and the 4th pin, and described the
One pin is connect with motherboard power supply, and the second pin and the load connect；The first end of the first resistor and described the
The connection of three pins；First power supply is connect with the second end of the first resistor；The first end of the second resistance respectively with
4th pin and control module connection, the second end ground connection of the second resistance；
Switch module is connected between the load and ground；And
Control module is connect with the detection module and the switch module respectively, for judging whether the electric current is small
In predetermined current, and when the electric current is less than predetermined current, the switch module conducting is controlled, to control the load over the ground
Electric discharge.
A kind of display device, the display device include load, drive module, printed circuit board, power management module and
Above-mentioned charge/discharge control circuit；The charge/discharge control circuit and the power management module are all set in the printed circuit board；
The charge/discharge control circuit is connect with motherboard power supply and the power management module respectively；The power management module is used for institute
State motherboard power supply handle and will treated that motherboard power supply is supplied to the load, to drive the load display picture.
Above-mentioned charge/discharge control circuit and display device passes through control module by the electric current of detection module detection load
Judge whether the electric current of load is less than predetermined current, when the electric current of load is less than predetermined current, the conducting of control switch module, with
Control load is discharged over the ground, to accelerate the velocity of discharge of load, load is avoided to show abnormal picture.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the display device of one embodiment；
Fig. 2 is the structural schematic diagram of the display device of another embodiment.
Specific embodiment
The application in order to facilitate understanding is described more fully the application below with reference to relevant drawings.In attached drawing
Give the better embodiment of the application.But the application can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more disclosure of this application
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.
Referring to Fig. 1, the display device 10 may include display for the structural schematic diagram of the display device in an embodiment
Panel 100, drive module 200 and printed circuit board 300.
Display panel 100 includes display area 110 and non-display area 120, and display area 110 that is to say image information
One piece of region of display, is referred to as viewing area (active area).Multiple data lines 111 are provided in display area 110
With a plurality of grid line 112.Multiple data lines 111 extend in a first direction, and arrange in a second direction.Grid line 112 is also referred to as scan line,
A plurality of grid line 112 extends in a second direction, arranges along first direction.It is appreciated that the extension of grid line 112 and data line 111, row
Column direction is opposite, that is, the extending direction of data line 111 is the orientation of grid line 112, the arrangement side of data line 111
To the extending direction for grid line 112.First direction, second direction are orthogonal simultaneously, please refer to Fig. 1, first direction can be managed
Solution is the extending direction of the Y-axis in vertical direction, that is, two-dimensional coordinate, and second direction can be understood as horizontal direction, also
It is the extending direction of the X-axis in two-dimensional coordinate.Multiple pixel units 113 being arranged in array are additionally provided in display area 110,
Pixel unit 113 is electrically connected with data line 111 and grid line 112 respectively.Non-display area 120 is often referred to the area that no image is shown
Domain, the partial region are mainly used for some routes and operative sensor being pressed together on this region.
In the application, display panel 100 may be, for example, TFT-LCD (Thin Film Transistor Liquid
Crystal Displayer, Thin Film Transistor-LCD) display panel, OLED (Organic Light-Emitting
Diode, Organic Light Emitting Diode) display panel, QLED (Quantum Dot Light Emitting Diodes, quantum dot hair
Optical diode) display panel, curved face display panel or other display panels.
Drive module 200 may include sequence controller 210, source drive unit 220 and drive element of the grid 230.Source
Pole driving unit 220 is electrically connected with data line 111, and drive element of the grid 230 is electrically connected with grid line 112.Sequence controller 210 is used
In transmission signal to source drive unit 220 and drive element of the grid 230.Specifically, sequence controller 210 be mainly used for will be
R (Red, red)/G (Green, green)/B (Blue, blue) compressed signal, control signal and power supply signal that mainboard of uniting transmits
It is handled, is that data line 111 provides data-signal and controls signal and pass through gate driving by source drive unit 220
Unit 230 is that grid line 112 provides driving signal and control signal, so that pixel unit 113 is able to carry out normal display.
Printed circuit board 300, abbreviation PCB (Printed Circuit Board).Sequence controller 210 is set to printing
On circuit board 300.Printed circuit board 300 is important electronic component, is the supporter of electronic component, is electronic component electricity
The carrier of gas connection.
Referring to Fig. 2, the charge/discharge control circuit includes detection module 20, switch module 30 and control module 40.It is described
Detection module 20 is used to detect the electric current of load 400.The switch module 30 is connected between the load 400 and ground.It is described
Control module 40 is connect with the detection module 20 and the switch module 30 respectively, for judging it is pre- whether the electric current is less than
If electric current, and when the electric current is less than predetermined current, it controls the switch module 30 and is connected, to control 400 pairs of the load
Ground electric discharge.
In the present embodiment, the load 400 is display panel 100.
It should be noted that the switch module 30 is connect with the public electrode of the load 400.
Drive module 200 can also include the charge/discharge control circuit 240 and power management module 250.The electric discharge control
Circuit 240 and the power management module 250 processed are all set in the printed circuit board 300.The charge/discharge control circuit 240 with
The motherboard power supply 500 of system board connects, and the detection module 20 is connected by the power management module 250 with the load
400.Specifically, the power management module 250 is connect with source drive unit 220 and drive element of the grid 230 respectively.It is described
Power management module 250 is used to carry out handling to the motherboard power supply 500 and motherboard power supply 500 passes through source electrode drive by treated
Moving cell 220 and drive element of the grid 230 are supplied to load 400, with 400 display picture of driving load.
Electric current between electric current, that is, power management module 250 of the load 400 and the load 400, Ye Jisuo
State the electric current between power management module 250 and the motherboard power supply 500.When 400 shutdown of load, the load 400
Electric current be reduced rapidly, when the electric current is less than predetermined current, the control module 40 controls the switch module 30 and is connected,
The load 400 is connected to ground, and then can be discharged rapidly by ground, to accelerate the velocity of discharge of the load 400.
In one embodiment, referring to Fig. 2, the detection module 20 includes current follower U1, first resistor R1, first
Power supply V1 and second resistance R2.Current follower U1 includes the first pin, second pin, third pin and the 4th pin.It is described
First pin is connect with motherboard power supply 500, and the second pin is connect with the load 400, specifically, the second pin is logical
The power management module 250 is crossed to connect with the load 400.The first end of the first resistor R1 and the third pin connect
It connects.The first power supply V1 is connect with the second end of the first resistor R1.The first end of the second resistance R2 respectively with institute
It states the 4th pin and the control module 40 connects, the second end ground connection of the second resistance R2.Current follower U1 passes through institute
State the electric current of the first pin and second pin detection load 400, the electricity between the third pin and the 4th pin
Flow it is directly proportional to the electric current between first pin and the second pin, if first pin and the second pin it
Between electric current indicate that the electric current between the third pin and the 4th pin is indicated with I34, then I12=a*I34 with I12,
Wherein, a is the definite value greater than 0.
In one embodiment, please continue to refer to Fig. 2, the control module 40 includes judging unit 41 and control unit 42.
The judging unit 41 is connect with the first end of the second resistance R2.Whether the judging unit 41 is for judging the electric current
Less than predetermined current, and when the electric current is less than predetermined current, output control signal.Described control unit 42 respectively with it is described
Judging unit 41 and the switch module 30 connect.Described control unit 42 is used to control the switch according to the control signal
Module 30 is connected.The judging unit 41 is by judging whether the electric current is less than predetermined current, to judge the load 400
Whether shut down, when the electric current is less than predetermined current, then 400 shutdown of load, the output of the judging unit 41 control letter
Number, it is connected so that described control unit 42 controls the switch module 30.
In one embodiment, please continue to refer to Fig. 2, the judging unit 41 includes operational amplifier U2, and the operation is put
The noninverting input of big device U2 is connect with the first end of the second resistance R2, and the reverse input end of the operational amplifier U2 is used
In receiving reference voltage Vref, the output end of the operational amplifier U2 is connect with described control unit 42.Draw when described first
When electric current I12 between foot and the second pin is less than predetermined current, then between the third pin and the 4th pin
Electric current I34=I12/a be less than preset value, therefore, the partial pressure of the second resistance R2 is less than reference voltage Vref, the operation
The output end of amplifier U2 exports low level.When the reference voltage Vref is 400 booting of load, the second resistance R2
The 50% of both end voltage is to the 80% of the second resistance R2 both end voltage.It should be understood that the reference voltage Vref is fixed
Value.
The operational amplifier U2 is using low cost, the chip of micro energy lose benchmark with voltage, thus reduce costs,
Save power consumption.
In one embodiment, please continue to refer to Fig. 2, described control unit 42 includes d type flip flop U3, the d type flip flop U3
Including first input end, the second input terminal and the first output end.The first input end and the operation amplifier of the d type flip flop U3
The output end of device U2 connects, and the second input terminal of the d type flip flop U3 is used to receive high level signal H, the d type flip flop U3's
First output end is connect with the switch module 30；The first output end of the d type flip flop U3 is used for when the d type flip flop U3's
When first input end receives the failing edge of output end transmission of the operational amplifier U2, the of the d type flip flop U3 is received
The high level that two input terminals are assigned to.Using the d type flip flop U3, the edging trigger characteristic of the d type flip flop U3 can prevent letter
By the interference of extraneous signal in number transmission process, guarantee the stability of signal transmission.
In one embodiment, please continue to refer to Fig. 2, the switch module 30 includes multiple electronic switch Q1.Each electronics
The first end of switch Q1 is connect with the first output end of the d type flip flop U3, and the second end of each electronic switch Q1 is born with described
Carry 400 connections, the third end ground connection of each electronic switch Q1.
In the present embodiment, the electronic switch Q1 is NMOS tube, and the first end of the electronic switch Q1 corresponds to NMOS tube
Grid, the second end of the electronic switch Q1 corresponds to the drain electrode of NMOS tube, and the third end of the electronic switch Q1 corresponds to NMOS
The source electrode of pipe.In other embodiments, the electronic switch Q1 can be NPN type triode, and the of the electronic switch Q1
One end corresponds to the base stage of NPN type triode, and the second end of the electronic switch Q1 corresponds to the collector of NPN type triode, described
The third end of electronic switch Q1 corresponds to the emitter of NPN type triode.The electronic switch Q1 can also be other with similar
The switch of function.For the electronic switch Q1 using metal-oxide-semiconductor field effect transistor or triode, loss is small, and response is fast, reliable and stable.
In one embodiment, please continue to refer to Fig. 2, the detection module 20 further includes capacitor C1, and the of the capacitor C1
One end is connect with the second pin of the current follower U1, the second end ground connection of the capacitor C1.The capacitor C1 for pair
Motherboard power supply 500 is filtered, to provide stable power supply for the load 400.
The working principle of the charge/discharge control circuit is illustrated below.
When the load 400 works normally i.e. 400 booting of load, the electric current of the load 400 is greater than or equal to
Voltage, that is, both ends second resistance R2 voltage of predetermined current, the noninverting input of the operational amplifier U2 is greater than or waits
High level is exported in the output end of the reference voltage Vref, the operational amplifier U2, the d type flip flop U3 does not work, institute
State NMOS tube cut-off；When 400 shutdown of load, the electric current decline of the load 400, when the electric current of the load 400 is small
When predetermined current, the voltage of the noninverting input of the operational amplifier U2 is less than the reference voltage Vref, the operation
The output end of amplifier U2 exports low level, and the output of the output end of the operational amplifier U2 becomes low level from high level,
The first input end of the d type flip flop U3 receives failing edge, and the high level of its second input terminal is assigned to by the d type flip flop U3
First output end, the NMOS transistor conduction, and then the load 400 is connected to ground, so that the load 400 can be fast by ground
Speed electric discharge, accelerates the velocity of discharge.
The charge/discharge control circuit of the application judges to load by the electric current of detection module detection load by control module
Electric current whether be less than predetermined current, when the electric current of load be less than predetermined current when, control switch module conducting, with control load
It discharges over the ground, to accelerate the velocity of discharge of load, load is avoided to show abnormal picture.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of charge/discharge control circuit, which is characterized in that the charge/discharge control circuit includes:
Detection module, for detecting the electric current of load；
Switch module is connected between the load and ground；And
Control module is connect with the detection module and the switch module respectively, for judging it is pre- whether the electric current is less than
If electric current, and when the electric current is less than predetermined current, the switch module conducting is controlled, is put over the ground with controlling the load
Electricity.
2. charge/discharge control circuit according to claim 1, which is characterized in that the detection module includes:
Current follower, including the first pin, second pin, third pin and the 4th pin, first pin and mainboard electricity
Source connection, the second pin and the load connect；
First resistor, the first end of the first resistor are connect with the third pin；
First power supply is connect with the second end of the first resistor；And
Second resistance, the first end of the second resistance are connect with the 4th pin and the control module respectively, and described
The second end of two resistance is grounded.
3. charge/discharge control circuit according to claim 2, which is characterized in that the control module includes:
Judging unit is connect with the first end of the second resistance, for judging whether the electric current is less than predetermined current, and is worked as
When the electric current is less than predetermined current, output control signal；And
Control unit is connect with the judging unit and the switch module respectively, for controlling institute according to the control signal
State switch module conducting.
4. charge/discharge control circuit according to claim 3, which is characterized in that the judging unit includes operational amplifier,
The noninverting input of the operational amplifier is connect with the first end of the second resistance, the reversed input of the operational amplifier
For receiving reference voltage, the output end of the operational amplifier is connect with described control unit at end.
5. charge/discharge control circuit according to claim 4, which is characterized in that described control unit includes d type flip flop, described
D type flip flop includes first input end, the second input terminal and the first output end；The first input end of the d type flip flop and the fortune
The output end connection of amplifier is calculated, the second input terminal of the d type flip flop is used to receive high level signal, the d type flip flop
First output end is connect with the switch module；First output end of the d type flip flop is used for first defeated when the d type flip flop
When entering the failing edge for terminating the output end transmission for receiving the operational amplifier, the second input terminal for receiving the d type flip flop is assigned
The high level given.
6. charge/discharge control circuit according to claim 5, which is characterized in that the switch module includes multiple electronic cuttings
It closes；The first end of each electronic switch is connect with the first output end of the d type flip flop, the second end of each electronic switch and institute
State load connection, the third end ground connection of each electronic switch.
7. charge/discharge control circuit according to claim 6, which is characterized in that the electronic switch is NMOS tube, the electricity
The first end of sub switch corresponds to the grid of NMOS tube, and the second end of the electronic switch corresponds to the drain electrode of NMOS tube, the electronics
The third end of switch corresponds to the source electrode of NMOS tube.
8. charge/discharge control circuit according to claim 5, which is characterized in that the detection module further includes capacitor, described
The first end of capacitor is connect with the second pin of the current follower, the second end ground connection of the capacitor.
9. a kind of charge/discharge control circuit, which is characterized in that the control of discharge includes:
Detection module, for detecting the electric current of load；The detection module includes current follower, first resistor, the first power supply
And second resistance；The current follower includes the first pin, second pin, third pin and the 4th pin, and described first draws
Foot is connect with motherboard power supply, and the second pin and the load connect；The first end of the first resistor is drawn with the third
Foot connection；First power supply is connect with the second end of the first resistor；The first end of the second resistance respectively with it is described
4th pin and control module connection, the second end ground connection of the second resistance；
Switch module is connected between the load and ground；And
Control module is connect with the detection module and the switch module respectively, for judging it is pre- whether the electric current is less than
If electric current, and when the electric current is less than predetermined current, the switch module conducting is controlled, is put over the ground with controlling the load
Electricity.
10. a kind of display device, which is characterized in that the display device includes load, drive module, printed circuit board, power supply
Charge/discharge control circuit described in any one of management module and claim 1-9；The charge/discharge control circuit and the power supply
Management module is all set in the printed circuit board；The charge/discharge control circuit respectively with motherboard power supply and the power management mould
Block connection；The power management module is used to carry out handling to the motherboard power supply and motherboard power supply is supplied to institute by treated
Load is stated, to drive the load to show picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811620197.3A CN109461422B (en) | 2018-12-28 | 2018-12-28 | Discharge control circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811620197.3A CN109461422B (en) | 2018-12-28 | 2018-12-28 | Discharge control circuit and display device |
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| Publication Number | Publication Date |
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| CN109461422A true CN109461422A (en) | 2019-03-12 |
| CN109461422B CN109461422B (en) | 2020-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020182063A1 (en) * | 2019-03-13 | 2020-09-17 | 惠科股份有限公司 | Apparatus and method for preventing static electricity in display panel, and display apparatus |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1420483A (en) * | 2001-11-19 | 2003-05-28 | 华邦电子股份有限公司 | Circuit and method for quick eliminating off afterimage of liquid crystel display |
| CN1447306A (en) * | 2002-03-26 | 2003-10-08 | 华邦电子股份有限公司 | Control device and method for eliminating ghost on panels of liquid crystal |
| CN101556776A (en) * | 2008-04-10 | 2009-10-14 | 北京京东方光电科技有限公司 | Driving circuit for realizing rapid discharge of pixel thin film transistor |
| CN102222490A (en) * | 2011-07-26 | 2011-10-19 | 青岛海信电器股份有限公司 | Back light source drive circuit and television |
| JP4909572B2 (en) * | 2005-11-11 | 2012-04-04 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
| US20150009202A1 (en) * | 2013-07-08 | 2015-01-08 | Silicon Works Co., Ltd. | Display driving circuit and display device |
| CN204558001U (en) * | 2015-04-16 | 2015-08-12 | 昆山龙腾光电有限公司 | Power-off ghost shadow eliminates circuit and gate driver circuit |
| CN105513549A (en) * | 2015-12-29 | 2016-04-20 | 深圳市华星光电技术有限公司 | Circuit for eliminating shutdown afterimage of liquid crystal display device and liquid crystal display device using same |
| CN105976776A (en) * | 2016-06-21 | 2016-09-28 | 深圳天珑无线科技有限公司 | Liquid crystal display screen discharging method, liquid crystal display screen and driving chip thereof |
| CN106558289A (en) * | 2015-09-30 | 2017-04-05 | 鸿富锦精密工业（深圳）有限公司 | Liquid crystal indicator and discharge control method |
| CN106952628A (en) * | 2017-05-05 | 2017-07-14 | 惠科股份有限公司 | Ghost eliminating circuit and display device |
| CN206805993U (en) * | 2017-06-07 | 2017-12-26 | 厦门亨立德电子有限公司 | The recording instrument without paper shown with backlight drive |
| CN108231030A (en) * | 2018-01-29 | 2018-06-29 | 京东方科技集团股份有限公司 | Discharge circuit, charging method and display device |
| CN108257565A (en) * | 2018-01-09 | 2018-07-06 | 惠科股份有限公司 | Display device and shutdown driving method thereof |
-
2018
- 2018-12-28 CN CN201811620197.3A patent/CN109461422B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1420483A (en) * | 2001-11-19 | 2003-05-28 | 华邦电子股份有限公司 | Circuit and method for quick eliminating off afterimage of liquid crystel display |
| CN1447306A (en) * | 2002-03-26 | 2003-10-08 | 华邦电子股份有限公司 | Control device and method for eliminating ghost on panels of liquid crystal |
| JP4909572B2 (en) * | 2005-11-11 | 2012-04-04 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
| CN101556776A (en) * | 2008-04-10 | 2009-10-14 | 北京京东方光电科技有限公司 | Driving circuit for realizing rapid discharge of pixel thin film transistor |
| CN102222490A (en) * | 2011-07-26 | 2011-10-19 | 青岛海信电器股份有限公司 | Back light source drive circuit and television |
| US20150009202A1 (en) * | 2013-07-08 | 2015-01-08 | Silicon Works Co., Ltd. | Display driving circuit and display device |
| CN204558001U (en) * | 2015-04-16 | 2015-08-12 | 昆山龙腾光电有限公司 | Power-off ghost shadow eliminates circuit and gate driver circuit |
| CN106558289A (en) * | 2015-09-30 | 2017-04-05 | 鸿富锦精密工业（深圳）有限公司 | Liquid crystal indicator and discharge control method |
| CN105513549A (en) * | 2015-12-29 | 2016-04-20 | 深圳市华星光电技术有限公司 | Circuit for eliminating shutdown afterimage of liquid crystal display device and liquid crystal display device using same |
| CN105976776A (en) * | 2016-06-21 | 2016-09-28 | 深圳天珑无线科技有限公司 | Liquid crystal display screen discharging method, liquid crystal display screen and driving chip thereof |
| CN106952628A (en) * | 2017-05-05 | 2017-07-14 | 惠科股份有限公司 | Ghost eliminating circuit and display device |
| CN206805993U (en) * | 2017-06-07 | 2017-12-26 | 厦门亨立德电子有限公司 | The recording instrument without paper shown with backlight drive |
| CN108257565A (en) * | 2018-01-09 | 2018-07-06 | 惠科股份有限公司 | Display device and shutdown driving method thereof |
| CN108231030A (en) * | 2018-01-29 | 2018-06-29 | 京东方科技集团股份有限公司 | Discharge circuit, charging method and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020182063A1 (en) * | 2019-03-13 | 2020-09-17 | 惠科股份有限公司 | Apparatus and method for preventing static electricity in display panel, and display apparatus |
| US11966128B2 (en) | 2019-03-13 | 2024-04-23 | HKC Corporation Limited | Display panel static electricity protection device, static electricity protection method, and display device |
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