CN109215605A - Driving circuit, driving device, display device and its driving method - Google Patents
Driving circuit, driving device, display device and its driving method Download PDFInfo
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- CN109215605A CN109215605A CN201811322702.6A CN201811322702A CN109215605A CN 109215605 A CN109215605 A CN 109215605A CN 201811322702 A CN201811322702 A CN 201811322702A CN 109215605 A CN109215605 A CN 109215605A
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- display panel
- panel
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- switching circuit
- driving
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention discloses a kind of driving circuit, driving device, display device and its driving method, and wherein the driving circuit includes sequence controller, panel power controller and switching circuit；Wherein, panel power controller, out-put supply to display panel；Sequence controller, after display panel starting, the first level signal of output to switching circuit turns off panel power controller by switching circuit and exports to the power supply of display panel；Be delayed preset time, and sequence controller exports second electrical level signal to switching circuit, is exported by switching circuit openable panel power-supply controller of electric to the power supply of display panel.The reliability of technical solution of the present invention promotion display panel.
Description
Technical field
The present invention relates to technical field of display panel, in particular to a kind of driving circuit, driving device, display device and its
Driving method.
Background technique
(Thin Film Transistor Liquid Crystal Display, tft liquid crystal are aobvious by TFT-LCD
Show device) it is one of principal item of present display panel, have become modern IT, display platform important in video product.
The main driving principle of TFT-LCD is that R/G/B compressed signal, control signal and power supply are passed through line by system board
Connector on material and PCB (Printed Circuit Board, printed circuit board) is connected, and data are by pcb board
After TCON (Timing Controller, sequence controller) processing, through pcb board, by source electrode driver and gate drivers with
Viewing area connection, so that viewing area obtains required power supply, signal.
Display panel each element on booting moment, pcb board need to establish its initial potential, pixel electrode in display panel
It charges, it is excessive to will cause immediate current of boot-strap, be easy to cause display panel operation irregularity.
Summary of the invention
The main object of the present invention is to provide a kind of driving circuit, it is intended to avoid display panel excessive in immediate current of boot-strap
When caused by display panel it is abnormal, promote the reliability of display panel.
To achieve the above object, driving circuit proposed by the present invention is applied to display panel, including sequence controller, face
Plate power-supply controller of electric and switching circuit；Wherein,
The panel power controller, out-put supply to display panel；
The sequence controller exports the first level signal to the switching circuit, passes through institute after display panel starting
Switching circuit shutdown panel power controller is stated to export to the power supply of display panel；Be delayed preset time, the sequence controller
Second electrical level signal is exported to the switching circuit, is exported by the switching circuit openable panel power-supply controller of electric to display surface
The power supply of plate.
In one embodiment, the sequence controller is connect with the switching circuit, the switching circuit and the panel
Power-supply controller of electric connection, the panel power controller are also connect with display panel.
In one embodiment, the switching circuit includes the first power supply, first resistor and first switch tube；First electricity
Source is connect with the first end of the first resistor, and the controlled end of the second end of the first resistor and the first switch tube connects
It connects, the input terminal of the first switch tube is connect with the panel power controller, the output end ground connection of the first switch tube.
In one embodiment, the first switch tube is N-type metal-oxide semiconductor (MOS).
In one embodiment, the sequence controller, after display panel starting, output high level signal to described first
The power supply of switching tube, the first switch tube conducting, the panel power controller output is shorted with ground, is stopped output and is extremely shown
Panel；
After the preset time that is delayed, the sequence controller output low level signal to the first switch tube, described first
Switching tube shutdown, the panel power controller out-put supply to display panel.
In one embodiment, the preset time range is t, wherein 20ms≤t≤100ms.
The present invention also proposes a kind of driving device, which includes driving circuit as described above.
The present invention also proposes a kind of display device, which includes gate drivers, source electrode driver, glass substrate
And driving device as described above；The gate drivers, source electrode driver are connect with the driving circuit respectively, the grid
Driver and source electrode driver are also electrically connected with the glass substrate respectively.
The present invention also proposes that a kind of driving method of display panel, the driving method include:
Whether the sequence controller detection display panel starts；
After display panel unlatching, the sequence controller exports the first level signal to the switching circuit, passes through institute
Switching circuit shutdown panel power controller is stated to export to the power supply of display panel；
Be delayed preset time, and the sequence controller output second electrical level signal is opened to the switching circuit by described
Powered-down road openable panel power-supply controller of electric is exported to the power supply of display panel.
In one embodiment, the preset time range is t, wherein 20ms≤t≤100ms.
Technical solution of the present invention includes sequence controller, panel power controller and switching circuit by setting, is formd
A kind of driving circuit.On a display panel after electricity, sequence controller is first turned off the power supply of output to display panel, when delay is default
Between after, be then turned on output to display panel power supply.Technical solution of the present invention by delay power supply so that in sequence controller and
After panel power controller the operation is stable, then restore the power supply to display panel, guaranteeing will not be because of immediate current in power supply
It is excessive and lead to display panel operation irregularity, thus Improving The Quality of Products.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the functional block diagram of one embodiment of present invention driver circuit；
Fig. 2 is the structural schematic diagram of one embodiment of present invention driver circuit；
Fig. 3 is the functional block diagram of one embodiment of the display device of that present invention；
Fig. 4 is the flow chart of one embodiment of driving method of the display device of that present invention.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Sequence controller | R1 | First resistor |
| 200 | Panel power controller | M1 | First switch tube |
| 300 | Switching circuit | VDD | DC source |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
It is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also not the present invention claims protection
Within the scope of.
The present invention proposes a kind of driving circuit, and in the present embodiment, which is applied to a kind of liquid crystal display panel.
Referring to Fig.1, in embodiments of the present invention, the driving circuit, be applied to display panel, including sequence controller 100,
Panel power controller 200 and switching circuit 300；Wherein,
The panel power controller 200, out-put supply to display panel；
The sequence controller 100, after display panel starting, the first level signal of output to the switching circuit 300,
The power supply of the output of panel power controller 200 to display panel is turned off by the switching circuit 300；Be delayed preset time, institute
It states sequence controller 100 and exports second electrical level signal to the switching circuit 300, pass through 300 openable panel of switching circuit
Power-supply controller of electric 200 is exported to the power supply of display panel.
It should be noted that the effect of sequence controller 100 is the LVDS (Low-Voltage that digiboard is sent
Differential Signaling, low-voltage differential signal) input image data signal (believe comprising RGB data by input signal
Number, clock signal, control signal three classes signal) by logic card processing after, be converted into that the LVDS signal of liquid crystal display can be driven, then
The LVDS for being routed directly to liquid crystal display receives chip.By the storage of processing shift register by viewdata signal, clock signal turns
Change the control signal that screen can identify, ranks signal RSDS (reduced swing differential signal, low pendulum into
Width differential signal) MOSFET pipe work in control flow and control the torsion resistance of liquid crystal molecule.Drive liquid crystal display displays images.Its
In, logic card is the component with software and intrinsic program.
In the present embodiment, after sequence controller 100 detects the total power switch conducting of display panel, the first level is exported
Signal is to the switching circuit 300 so that the access between panel power controller 200 and ground is connected, panel power stop to
Display panel out-put supply；First level signal duration is preset time, when preset time reaches, timing control
Device 100 exports second electrical level signal to switching circuit 300, so that the access between panel power controller 200 and display panel
It connects, panel power controller 200 starts to power to display panel.
Technical solution of the present invention includes sequence controller 100, panel power controller 200 and switching circuit by setting
300, form a kind of driving circuit.On a display panel after electricity, sequence controller 100 is first turned off the electricity of output to display panel
Source, be delayed preset time after, open output to display panel power supply.Technical solution of the present invention is powered by delay, so that
Restore again after delay after 200 the operation is stable of sequence controller 100 and panel power controller this period in delay
Power supply guarantees that display panel operation irregularity will not be led to because immediate current is excessive in power supply, thus Improving The Quality of Products.
Further, the sequence controller 100 is connect with the switching circuit 300, the switching circuit 300 with it is described
Panel power controller 200 connects, and the panel power controller 200 is also connect with display panel.
In the present embodiment, the control terminal of sequence controller 100 is connect with the controlled end of switching circuit 300, switching circuit 300
Volume input terminal is connect with panel power controller 200, the output end ground connection of switching circuit 300.
Further, the switching circuit 300 includes the first power supply, first resistor R1 and first switch tube M1；Described
One power supply is connect with the first end of the first resistor R1, and the second end of the first resistor R1 is with the first switch tube M1's
Controlled end connection, the input terminal of the first switch tube M1 are connect with the panel power controller 200, the first switch tube
The output end of M1 is grounded.
In the present embodiment, the first switch tube M1 is NMOS tube, i.e. N-type metal-oxide semiconductor (MOS).First power supply is adopted
Use DC source.The second end of first end resistance is connect with the gate pole of first switch tube M1, the source electrode ground connection of first switch tube M1, the
The drain electrode of one switching tube M1 is connect with panel power controller 200.
Specifically, the sequence controller 100, after display panel starting, output high level signal to described first is opened
Pipe M1, the first switch tube M1 conducting are closed, 200 out-put supply of panel power controller is shorted with ground, stops output and extremely show
Panel；
After the preset time that is delayed, the output of sequence controller 100 low level signal is described to the first switch tube M1
First switch tube M1 shutdown, 200 out-put supply of panel power controller to display panel.
In the present embodiment, the preset time range is t, wherein 20ms≤t≤100ms.When preset time is smaller, display
The charging of the electronic components initial potential such as liquid crystal pixel in panel does not complete also, after switching circuit 300 is connected, in worry panel
Electric current it is still larger, product exist damage risk.When preset time is larger, cause the display panel opening time too long, shadow
Ring user experience.
To sum up, the embodiment of the present invention is further elaborated in conjunction with Fig. 2:
Wherein, first switch tube M1 is NMOS, and when it is high level signal that it, which controls signal, first switch tube M1 is opened,
When it is low level signal that it, which controls signal, first switch tube M1 is closed；DC source VDD is high level signal.
In practical application, booting moment, panel power controller generates vdd voltage, the at this time control of first switch tube M1
Signal is high level signal, and first switch tube M1 is opened；Panel power controller is exported to the VAA voltage and GND of rear end at this time
It is shorted, i.e. VAA is not exported to backend load.Again because remaining high voltage of panel power controller is required to through VAA voltage
It generates, so remaining high voltage can not also generate, system does not work.The only VDD of panel power controller in drive system at this time
Part and sequence controller are working normally.
After the current potential foundation of the part VDD, which is finished, to be worked normally with sequence controller, sequence controller exports low level electricity
Pressure, first switch tube M1 are closed；Panel power goes into operation to the VAA voltage that device generates and can normally export to liquid crystal display panel at this time,
Remaining high voltage of panel power controller is generated also by VAA voltage, and entire liquid crystal display systems starts to work normally at this time.
A kind of driving device of the present invention, including driving circuit as described above.The specific structure of the driving circuit is referring to upper
Embodiment is stated, since this driving circuit uses whole technical solutions of above-mentioned all embodiments, at least there is above-mentioned reality
All beneficial effects brought by the technical solution of example are applied, this is no longer going to repeat them.
In addition, the present invention also proposes a kind of display device, including gate drivers, source electrode driver, glass substrate and such as
The upper driving device；The gate drivers, source electrode driver are connect with the driving circuit respectively, the gate driving
Device and source electrode driver are also electrically connected with the glass substrate respectively.
The specific structure of the driving device is referring to above-described embodiment, since this display device uses above-mentioned all embodiments
Whole technical solutions, therefore at least with above-described embodiment technical solution brought by all beneficial effects, herein no longer
It repeats one by one.
Referring to Fig. 4, in addition, the present invention also proposes that a kind of driving method of display device, the driving method include:
Whether S100, sequence controller detection display panel start.
It should be noted that can be detected by sequence controller after the general supply starting of display panel.It can in the present embodiment
Detect whether display panel starts by sample circuit, current sensor etc..
S200, after display panel unlatching, the sequence controller exports the first level signal to the switching circuit, leads to
The switching circuit shutdown panel power controller is crossed to export to the power supply of display panel.
Sequence controller exports the first level signal to the switching circuit, switching circuit Switching power channel, so that stopping
Only out-put supply is to display panel.
S300, delay preset time, the sequence controller output second electrical level signal pass through institute to the switching circuit
Switching circuit openable panel power-supply controller of electric is stated to export to the power supply of display panel.
Further, the preset time range is t, wherein 20ms≤t≤100ms.When preset time is smaller, display
The charging of the electronic components initial potential such as liquid crystal pixel in panel does not complete also, after switching circuit 300 is connected, in display panel
Electric current it is still larger, product exist damage risk.When preset time is larger, cause the display panel opening time too long, shadow
Ring user experience.
Display driving method proposed by the present invention and display drive apparatus, can for example applied to ultra high-definition display panel,
The logic card driving of full HD display panel can be used in the ultra high-definition display panel.Wherein, display panel may be, for example, LCD aobvious
Show panel, OLED display panel, QLED display panel, curved face display panel or other display panels.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. a kind of driving circuit, be applied to display panel, which is characterized in that including sequence controller, panel power controller and
Switching circuit；Wherein,
The panel power controller, out-put supply to display panel；
The sequence controller exports the first level signal to the switching circuit, is opened by described after display panel starting
Powered-down road shutdown panel power controller is exported to the power supply of display panel；Be delayed preset time, the sequence controller output
Second electrical level signal is exported by the switching circuit openable panel power-supply controller of electric to display panel to the switching circuit
Power supply.
2. driving circuit as described in claim 1, which is characterized in that the sequence controller is connect with the switching circuit,
The switching circuit is connect with the panel power controller, and the panel power controller is also connect with display panel.
3. driving circuit as claimed in claim 2, which is characterized in that the switching circuit includes the first power supply, first resistor
And first switch tube；First power supply is connect with the first end of the first resistor, the second end of the first resistor and institute
The controlled end connection of first switch tube is stated, the input terminal of the first switch tube is connect with the panel power controller, described
The output end of first switch tube is grounded.
4. driving circuit as claimed in claim 2, which is characterized in that the first switch tube is that N-type metal oxide is partly led
Body.
5. driving circuit as claimed in claim 3, which is characterized in that the sequence controller, it is defeated after display panel starting
High level signal to the first switch tube, the first switch tube is connected out, the power supply of the panel power controller output
It is shorted with ground, stops output to display panel；
After the preset time that is delayed, the sequence controller exports low level signal to the first switch tube, the first switch
Pipe shutdown, the panel power controller out-put supply to display panel.
6. the driving circuit as described in any one of claim 1 to 5, which is characterized in that the preset time range is t,
Wherein, 20ms≤t≤100ms.
7. a kind of driving device, which is characterized in that including driving circuit as claimed in any one of claims 1 to 6.
8. a kind of display device, which is characterized in that including gate drivers, source electrode driver, glass substrate and such as claim 7
The driving device；The gate drivers, source electrode driver are connect with the driving circuit respectively, the gate drivers
And source electrode driver is also electrically connected with the glass substrate respectively.
9. a kind of driving method of display device, which is characterized in that the driving method includes:
Whether sequence controller detection display panel starts；
After display panel unlatching, the sequence controller exports the first level signal to switching circuit, passes through the switch electricity
Road shutdown panel power controller is exported to the power supply of display panel；
Be delayed preset time, and the sequence controller exports second electrical level signal to the switching circuit, passes through the switch electricity
Road openable panel power-supply controller of electric is exported to the power supply of display panel.
10. driving method as claimed in claim 9, which is characterized in that the preset time range is t, wherein 20ms≤t
≤100ms。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322702.6A CN109215605B (en) | 2018-11-07 | 2018-11-07 | Driving circuit, driving device, display device and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322702.6A CN109215605B (en) | 2018-11-07 | 2018-11-07 | Driving circuit, driving device, display device and driving method thereof |
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| Publication Number | Publication Date |
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| CN109215605A true CN109215605A (en) | 2019-01-15 |
| CN109215605B CN109215605B (en) | 2021-02-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811322702.6A Active CN109215605B (en) | 2018-11-07 | 2018-11-07 | Driving circuit, driving device, display device and driving method thereof |
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| CN110554642A (en) * | 2019-08-16 | 2019-12-10 | 惠州高盛达科技有限公司 | Sequential control system for testing T-con board |
| CN112185305A (en) * | 2019-07-04 | 2021-01-05 | 京东方科技集团股份有限公司 | Backlight control device, backlight control method and display device |
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| CN109215605B (en) | 2021-02-19 |
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