CN110211520A - Display panel debug circuit - Google Patents
Display panel debug circuit Download PDFInfo
- Publication number
- CN110211520A CN110211520A CN201910495547.6A CN201910495547A CN110211520A CN 110211520 A CN110211520 A CN 110211520A CN 201910495547 A CN201910495547 A CN 201910495547A CN 110211520 A CN110211520 A CN 110211520A
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- China
- Prior art keywords
- power supply
- display panel
- voltage
- bouncing pilotage
- circuit
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (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)
Abstract
The present invention relates to a kind of display panel debug circuits, comprising: voltage transformation module carries out voltage conversion, output driving supply voltage for connecting the power supply of governor circuit, and to the power supply of governor circuit；Power supply is regulated power supply, and the picture that governor circuit is used to control the display panel is shown.Voltage selecting unit selects selection to export the voltage of power supply, perhaps debugs the voltage or driving supply voltage of power supply for connecting the power supply, debugging power supply and voltage transformation module of governor circuit, and to display panel.
Description
Technical field
The present invention relates to display field more particularly to a kind of display panel debug circuits.
Background technique
In display panel exploitation and production process, need to check display panel and debugged.In general, to display surface
When plate is checked, only pressure stabilizing is needed to light；And when needing to debug display panel, needing to input display panel can
The supply voltage of fine tuning is to test its performance.And with the continuous development of flat panel display and popularize, to meet different fields
The type of scape demand, display panel is more and more, because the operating voltage of the display panel without copper is also not quite similar.
In practice, inventors have found that traditional display panel apparatus for lighting supply voltage is single, polymorphic type can not be adapted to
Demand is lighted and debugged to display panel.
Summary of the invention
Based on this, it is necessary to lighting for polymorphic type display panel can not be adapted to for above-mentioned conventional display panels apparatus for lighting
The technical issues of with debugging demand, provide a kind of display panel debug circuit.
The embodiment of the present invention provides a kind of display panel debug circuit, comprising:
Voltage transformation module carries out electricity for connecting the power supply of governor circuit, and to the power supply of governor circuit
Pressure conversion, output driving supply voltage；Power supply is regulated power supply, and the picture that governor circuit is used to control the display panel is aobvious
Show；
Voltage selecting unit, for connecting the power supply of governor circuit, debugging power supply and voltage transformation module, and to
The voltage of display panel selection selection output power supply, perhaps debugs the voltage or driving supply voltage of power supply.
Voltage selecting unit includes the first bridle wire apparatus and the second bridle wire apparatus in one of the embodiments,；
First bridle wire apparatus includes the first jumper cap, the first bouncing pilotage, the second bouncing pilotage and third bouncing pilotage；Second bridle wire apparatus packet
Include the second jumper cap, the forth jump needle, the fifth jump needle and the 6th bouncing pilotage；
First bouncing pilotage connects the output end of voltage transformation module, and the second bouncing pilotage connects the forth jump needle, and third bouncing pilotage is for connecting
Connect debugging power supply；
The fifth jump needle is for connecting display panel, and the 6th bouncing pilotage is for connecting power supply；
First jumper cap is for selecting the first bouncing pilotage of conducting and the second bouncing pilotage, or selection conducting third bouncing pilotage and second to jump
Needle；
Second jumper cap is for selecting conducting the forth jump needle and the fifth jump needle, or selection the 6th bouncing pilotage of conducting and the fifth jump
Needle.
Display panel debug circuit is additionally provided with feedback regulating circuit in one of the embodiments,；
Feedback regulating circuit is used for the output voltage information of collection voltages conversion module, and feeds back to voltage transformation module；
Voltage transformation module keeps driving supply voltage to stablize output according to the feedback information of feedback regulating circuit.
Voltage transformation module is Buck conversion circuit chip in one of the embodiments, and feedback regulating circuit includes
First resistor and second resistance；
The output end of the first end connection Buck conversion circuit chip of first resistor, the second end of first resistor connect respectively
Connect the first end of second resistance and the feedback end of Buck conversion circuit chip, the second end ground connection of second resistance.
Display panel debug circuit further includes switch unit in one of the embodiments,；The first switch of switch unit
The fifth jump needle of the second bridle wire apparatus of end connection, the second switch end of switch unit are used to connect display panel, switch unit
Control terminal connects governor circuit；Switch unit is used for the on or off under the control of governor circuit.
Switch unit is field-effect tube in one of the embodiments, and the source electrode of field-effect tube connects the second bridle wire apparatus
The fifth jump needle, the drain electrode of field-effect tube is for connecting display panel, and the grid of field-effect tube is for connecting governor circuit.
Display panel debug circuit further includes current regulation unit in one of the embodiments,；
Current regulation unit includes 3rd resistor, variable resistance and switching tube；
The source electrode of the first end connection field-effect tube of 3rd resistor；
First fixing end of variable resistance is separately connected the second end of 3rd resistor and the grid of field-effect tube, can power transformation
Resistance the second fixing end connection switch pipe first switch end, the first switch end of the adjustable side connection switch pipe of variable resistance or
The second end of person's connection 3rd resistor；
The second switch end of switching tube is grounded, and the control terminal of switching tube is for connecting governor circuit.
Display panel debug circuit further includes first diode, the anode of first diode in one of the embodiments,
Power supply is debugged for connecting, the cathode of first diode connects the third bouncing pilotage of the first bridle wire apparatus；First diode is for preventing
Only debug reverse power connection.
Display panel debug circuit further includes the second diode, the anode of the second diode in one of the embodiments,
For connecting power supply, the cathode of the second diode connects the 6th bouncing pilotage of the second bridle wire apparatus；Second diode is for preventing
Only power supply is reversely connected.
Display panel debug circuit, which is additionally provided with, in one of the embodiments, is used to indicate the first hair that debugging power supply is connected
Optical diode, and it is used to indicate the second light emitting diode of power supply connection,
The anode of first light emitting diode is used to connect the third bouncing pilotage of the first bridle wire apparatus, and the first light emitting diode is born
Pole ground connection；
6th bouncing pilotage of anode the second bridle wire apparatus of connection of the second light emitting diode, the cathode of the second light emitting diode connect
Ground.
Above-mentioned display panel debug circuit, by setting voltage selecting unit and voltage transformation module, with power supply
Pass through voltage selecting circuit when needing to be lighted using power supply fine tuning power supply and debug display panel for main power source
Directly conducting power supply is powered to display panel, while power supply is also powered to the governor circuit of circuit.Needing difference
When voltage lights display panel without finely tuning supply voltage debugging, voltage is carried out to power supply using voltage transformation module
Conversion selects voltage transformation module to power to display panel by voltage selecting circuit, while power supply is kept to master control mould
The power supply of block.When needing different voltages to be debugged, debugging power supply can connect, and be connected by voltage selecting circuit
It debugs power supply to power to display panel, while power supply keeps the power supply to external module, to realize the tune to display panel
Examination.The display panel voltage source circuit of the embodiment of the present invention can be compatible with different types of display panel, can satisfy different voltages
The debugging demand of power supply.
Detailed description of the invention
Fig. 1 is the module diagram of one embodiment of the invention display panel debug circuit；
Fig. 2 is the module diagram of another embodiment of the present invention display panel debug circuit；
Fig. 3 is the circuit diagram of one embodiment of the invention display panel debug circuit；
Fig. 4 is the display panel debug circuit schematic diagram of bridle wire apparatus there are two one embodiment of the invention is set；
Fig. 5 is the circuit diagram of the display panel debug circuit of one embodiment of the invention.
Specific embodiment
Purpose, technical solution and technical effect for a better understanding of the present invention, below in conjunction with drawings and examples
Further explaining illustration is carried out to the present invention.It states simultaneously, embodiments described below for explaining only the invention, and does not have to
It is of the invention in limiting.
As shown in Figure 1, the embodiment of the present invention provides a kind of display panel debug circuit, including voltage transformation module 1 and electricity
Press selecting unit 2.Voltage transformation module 1 is used to connect the power supply 3 of governor circuit, and to the power supply of governor circuit 3
Carry out voltage conversion, output driving supply voltage.Voltage selecting unit 2 is used to connect the power supply 3 of governor circuit, debugging electricity
Source 4 and voltage transformation module 1, and to the voltage of the selection output power supply 3 of display panel 5, or debug the electricity of power supply 4
Pressure, or driving supply voltage.
Wherein, voltage transformation module 1 is the free voltage conversion circuit that external power supply is converted can to can be change
Depressor is also possible to voltage-stablizer, as long as corresponding driving voltage can be provided to display panel 5.
Display panel 5 is the device for being able to carry out pattern displaying, can be liquid crystal display panel, is also possible to organic light emission
Display panel.Different types of panel has different operating voltages.By taking liquid crystal display panel as an example, for being fabricated to display
The LCD display board size of device is smaller, and the operating voltage of such liquid crystal display panel is lower, is 5V or lower.For making
Larger at the LCD display board size of television set, the operating voltage of such liquid crystal display panel is higher, is 12V or higher.
Governor circuit is any circuit shown for controlling the display panel 5 carry out pictures, can be control chip, can also
To be microprocessor or computer installation, as long as display control signal can be exported to display panel 5 so that display panel 5 is aobvious
Show default picture.
Voltage selecting unit 2 is used to select to be connected the power supply 3 of governor circuit with display panel 5, or selection will
It debugs power supply 4 and display panel 5 is connected, or selection converts the voltage into module 1 and display panel 5 is connected, with compatible point high light
Try different types of display panel 5.Wherein, the power supply 3 of master control panel and debugging power supply 4 are all fine-tuning power supplys, are made
The electric property of display panel 5 can be debugged by trim voltage or electric current by obtaining.Voltage transformation module 1 can export pre-
Fixed burning voltage carries out pressure stabilizing power supply to display panel 5 to carry out lighting test.It is more that voltage selecting unit 2 can be hilted broadsword
Throw switch is also possible to bridle wire apparatus, can also be the combination of multi output chip and switching device, as long as can be to display panel
5 selections provide corresponding driving supply voltage or selection provides the voltage of power supply 3 or selection provides debugging power supply 4
Voltage.
Optionally, voltage transformation module 1 can be boost module, be also possible to voltage reduction module.
Optionally, voltage transformation module 1 can be set multiple, and the input terminal of each voltage transformation module 1 is used to connect
Power supply 3, the output end of each voltage transformation module 1 are connected respectively an input terminal of voltage selecting circuit.Each
Voltage transformation module 1 all carries out voltage conversion to power supply 3, respectively corresponds one driving supply voltage of output, each driving
Supply voltage is different.
Optionally, voltage transformation module 1 can also be the voltage conversion chip of multiport output.Voltage conversion chip it is defeated
Enter end for connecting power supply 3, each output port exports a driving voltage respectively, and each output port is connected respectively electricity
Press an input terminal of selection circuit.
Optionally, debugging power supply 4 can configure multiple, and voltage selecting unit 2 is equipped with multiple for being connected respectively tune
Try 4 input terminal of power supply.
Display panel debug circuit provided in an embodiment of the present invention, it is corresponding by each input terminal for configuring voltage selecting circuit
It connects the power supply 3 of governor circuit, debug the output end of power supply 4 and voltage transformation module 1, have multi-mode output, energy
Enough it is compatible with different 5 debugging demands of display panel.Specifically, the power supply 3 of governor circuit is in addition to the debugging in display panel 5
Except powering in the process to governor circuit, if the operating voltage of display panel 5 is consistent with the voltage of power supply 3, it can lead to
The selection of overvoltage selecting unit 2 conducting power supply 3 and display panel 5, power supply 3 are directly powered to display panel 5 and are carried out
Debugging.
When the voltage of the operating voltage of display panel 5 and power supply 3 is inconsistent, if only needing to light display panel 5
Without finely tuning supply voltage or electric current, then only conducting voltage conversion module 1 and display need to be selected by voltage selecting unit 2
Panel 5 carries out display panel 5 to light test, and power supply 3 keeps powering to governor circuit simultaneously, to save access
The trouble of additional debugging power supply 4；If desired display panel 5 is debugged, then debugging power supply 4 can be accessed, passes through voltage
The selection conducting debugging power supply 4 of selecting unit 2 and display panel 5, can debug display panel 5, meanwhile, power supply 3
It still maintains and powers to governor circuit.
As shown in figure 3, voltage selecting unit 2 is bridle wire apparatus in one of the embodiments,.Bridle wire apparatus is for controlling
The on-off of electric current flowing in circuit processed, to realize the device of the selection conducting of circuit.Bridle wire apparatus includes jumper cap, the first jump
Needle, the second bouncing pilotage, third bouncing pilotage and the forth jump needle.Wherein, the first bouncing pilotage is as input terminal, for connecting debugging power supply 4.The
Two bouncing pilotages are as output end, for connecting display panel 5.Third bouncing pilotage connects the output of voltage transformation module 1 as input terminal
End.The forth jump needle is as input terminal, for connecting the power supply 3 of main control module.Optionally, third bouncing pilotage is equipped with multiple, electricity
Conversion module 1 is pressed also to be provided with multiple, the output end of each voltage transformation module 1 is correspondingly connected with a third bouncing pilotage.Optionally,
First bouncing pilotage is equipped with multiple；Debugging power supply 4 also be provided with it is multiple, for providing multiple voltage.Each debugging power supply 4 is correspondingly connected with one
A first bouncing pilotage.Any two bouncing pilotage can be connected in jumper cap, to realize wire jumper, provide power supply for selecting to display panel 5
The voltage of power supply 3 perhaps debugs the voltage or driving supply voltage of power supply 4.For example, when needing to provide confession to display panel 5
When the voltage of power supply 3 is to light and debug display panel 5, the forth jump needle is connected in jumper cap and power supply can be realized in the second bouncing pilotage
Power supply 3 is powered to display panel 5.When needing voltage transformation module 1 to power to display panel 5, jumper cap conducting corresponding the
Three bouncing pilotages and the second bouncing pilotage can be realized voltage transformation module 1 and power to display panel 5 to light display panel 5.It needs to illustrate
, third bouncing pilotage has multiple, and the output end of each voltage transformation module 1 is correspondingly connected with a third bouncing pilotage, therefore selects
Different third bouncing pilotages is connected can provide different driving voltages to display panel 5, when needs provide driving to display panel 5
When voltage, it need to only select conducting that can provide the third bouncing pilotage of respective drive voltage to display panel 5.It is electric when needing to debug
When source 4 powers to display panel 5, debugging power supply 4 is can be realized by the way that corresponding first bouncing pilotage and the second bouncing pilotage is connected in jumper cap
It is debugged to the power supply of display panel 5.Certainly, debugging power supply 4 can configure it is multiple, the first bouncing pilotage also can be set it is multiple, with
The configuration of third bouncing pilotage is similar, and details are not described herein.
Optionally, display panel debug circuit further includes derailing switch 9.The first switch end of derailing switch 9 is for connecting power supply
Power supply 3, the forth jump needle of second switch end tie jumper device.Optionally, display panel debug circuit further includes for protecting
The first diode D1 of circuit and the second diode D2.The anode of first diode D1 is for connecting debugging power supply 4, cathode connection
Bridle wire apparatus.The anode of second diode D2 is for connecting power supply 3, cathode tie jumper device.Optionally, display panel
Debug circuit further includes fuse F1 and fuse F2.Fuse F1 is arranged between the second diode D2 and bridle wire apparatus, protects
Dangerous silk F2 is arranged between first diode D1 and bridle wire apparatus.Optionally, display panel debug circuit further includes for filtering
The first filter capacitor CP1 and the second filter capacitor CP2.The first end of first filter capacitor CP1 connects the second diode D2's
Cathode, second end ground connection.The cathode of the first end connection first diode D1 of second filter capacitor CP2, second end ground connection.
As shown in figure 4, voltage selecting unit 2 includes that the first bridle wire apparatus 21 and second is jumped in one of the embodiments,
Line apparatus 22.First bridle wire apparatus 21 includes the first jumper cap, the first bouncing pilotage P1, the second jump P2 needle and third bouncing pilotage P3；Second
Bridle wire apparatus 22 includes the second jumper cap, the forth jump needle P4, the fifth jump needle P5 and the 6th bouncing pilotage P6.Wherein, the first bridle wire apparatus
21 the first bouncing pilotage P1 connects the output end of voltage transformation module 1 as input terminal.Second bouncing pilotage P2 of the first bridle wire apparatus 21
As output end, the forth jump needle P4 of the second bridle wire apparatus 22 is connected.The third bouncing pilotage P3 of first bridle wire apparatus 21 is as input
End, for connecting debugging power supply 4.Optionally, debugging power supply 4 can configure multiple, the third bouncing pilotage P3 of the first bridle wire apparatus 21
It also is provided with multiple.Each debugging power supply 4 is correspondingly connected with the third bouncing pilotage P3 of first bridle wire apparatus 21.First jumper cap is used for
The the first bouncing pilotage P1 and the second bouncing pilotage P2 of selection the first bridle wire apparatus 21 of conducting, or selection the first bridle wire apparatus 21 of conducting the
Three bouncing pilotage P3 and the second bouncing pilotage P2, so that drive of first bridle wire apparatus 21 to 22 output voltage conversion module 1 of the second bridle wire apparatus
Dynamic supply voltage or the voltage for debugging power supply 4.
The fifth jump needle P5 of second bridle wire apparatus 22 is as output end, for connecting display panel 5.Second bridle wire apparatus 22
The 6th bouncing pilotage P6 as input terminal, for connecting the power supply 3 of governor circuit.Second jumper cap is for selecting conducting second
The forth jump needle P4 and the fifth jump needle P5 of bridle wire apparatus 22, or the 6th bouncing pilotage P6 and the of selection the second bridle wire apparatus 22 of conducting
Five bouncing pilotage P5, so that driving supply voltage of second bridle wire apparatus 22 to 5 output voltage conversion module 1 of display panel, or adjust
Try the voltage of power supply 4 or the voltage of power supply 3.
As shown in figure 5, display panel debug circuit is additionally provided with feedback regulating circuit 7 in one of the embodiments,.Feedback
The output voltage that circuit 7 is used for collection voltages conversion module 1 is adjusted, the output voltage of voltage transformation module 1 is fed back.Electricity
Press conversion module 1 according to the feedback information of feedback regulating circuit 7, keep driving supply voltage stablizes output.
Optionally, voltage transformation module 1 is buck chip, i.e. Buck conversion circuit chip.Optionally, feedback regulation electricity
Road 7 includes first resistor R1 and second resistance R2.Wherein, the output of the first end connection decompression conversion chip of first resistor R1
End, the second end of first resistor R1 are separately connected the first end of second resistance R2 and are depressured the feedback end of conversion chip, and second
The second end of resistance R2 is grounded.By the setting of first resistor R1 and second resistance R2 series connection ground connection, decompression can be converted core
Form of the output voltage information of piece to divide is depressured conversion chip according to feedback to the feedback end feedback of decompression conversion chip
Output voltage is adjusted in information of voltage, to keep the stabilization of output voltage.Optionally, power supply is 12V power supply, drop
Pressure conversion chip by the voltage of power supply 3 be converted to 5V output, optionally, first resistor R1 be 35.7K Ω resistance, second
Resistance R2 is the resistance of 6.8K Ω, then the feedback end of decompression conversion chip does not need to adjust when receiving 0.8V Voltage Feedback
Output voltage needs to improve output voltage when receiving less than 0.8V Voltage Feedback, needs when receiving greater than 0.8V Voltage Feedback
Reduce output voltage.Optionally, decompression conversion chip is TPS54620RHLR model chip.
Display panel debug circuit includes switch unit 6 in one of the embodiments,.Switch unit 6 is for controlling the
The on-off that two bridle wire apparatus 22 export display panel 5.Switching Power Supply can be any controllable switch, such as switching tube, relay
Device etc..The first switch end of switch unit 6 connects the fifth jump needle of the second bridle wire apparatus 22, the second switch end of switch unit 6
For connecting display panel 5, the control terminal of switch unit 6 connects governor circuit.Switch unit 6 bamboo control interest circuit control under
On or off.
Optionally, switch unit 6 is field-effect tube.The source electrode of field-effect tube connects the fifth jump of the second bridle wire apparatus 22
Needle, the drain electrode of field-effect tube is for connecting display panel 5, and the grid of field-effect tube is for connecting governor circuit.Wherein, master control electricity
Road can be control chip, microprocessor or computer installation, control as long as can be exported by output end to field-effect tube
Voltage generates gate source voltage to control the on-off of field-effect tube.Optionally, field-effect tube is the field-effect of AO4409 model
Pipe.Wherein, AO4409 signal field-effect tube includes eight pins, and the first pin to third supervisor is source electrode, is all connected with the second jump
The fifth jump needle of line apparatus 22；4th pin is grid, for connecting governor circuit；5th pin to the 8th pin is drain electrode,
It is used to connection display panel 5.
Display panel debug circuit further includes current regulation unit 8, current regulation unit 8 in one of the embodiments,
For adjusting the opening degree of field-effect tube, to adjust the conducting electric current of field-effect tube.
Optionally, current regulation unit 8 includes 3rd resistor R3, variable resistance R4 and switching tube.The of 3rd resistor R3
One end connects the source electrode of field-effect tube, and the first fixing end of variable resistance R4 is separately connected second end and the field of 3rd resistor R3
The grid of effect pipe, the first switch end of the second fixing end connection switch pipe of variable resistance R4, the adjustable side of variable resistance R4
The first switch end of connection switch pipe or the second end for connecting 3rd resistor R3.The second switch end of switch terminals is grounded.Pass through
The series connection of 3rd resistor R3 and variable resistance R4 divides, can the output voltage to voltage transformation module 1 carry out controllable partial pressure,
So that the gate source voltage Vgs being added in field-effect tube is controllable, and then controls the opening degree of field-effect tube, i.e., controlling filed is imitated
Should pipe conducting electric current.Optionally, the resistance that 3rd resistor R3 is 100K ohm.Optionally, variable resistance R4 is 3296W series
Adjustable potentiometer；Optionally, variable resistance R4 is 3296W-1-103LF model adjustable potentiometer.
Optionally, current regulation unit 8 further includes that side meets capacitor C, and side connects the grid of the first end connection field-effect tube of capacitor C
Pole, side connect the second end ground connection of capacitor C.Side connects the setting of capacitor C, and cooperation variable resistance R4 is adjustable to be supplied to display panel 5
The speed of electricity, changes the rise time of power supply point.Change the resistance value of variable resistance R4, it is not only adjustable to be added in field-effect tube
On gate source voltage Vgs, can also adjust and be added in the other voltage for connecing the both ends capacitor C.When controlling field-effect tube conducting, field-effect
The gate source voltage Vgs of pipe can change, and being added in side and connecing the both ends capacitor C piezoelectric voltage can also change, and gate source voltage Vgs needs to wait for side and connects
Capacitor C is just able to maintain stabilization after completing charge and discharge, i.e. field-effect tube is just completed to open when gate source voltage Vgs keeps stablizing, from
And it powers to display panel 5.Therefore, pass through the access resistance value of change variable resistance R4, thus it is possible to vary by when conducting field-effect tube
The voltage at the both ends capacitor C is connect, to change the charge and discharge time of capacitor, the control of field-effect tube turn-on time is realized, that is, realizes
The control of 5 power-on time of display panel.The speed of 5 power-on time of display panel will bring shadow to the electric property of display panel 5
It rings, meets capacitor C by the way that side is arranged, the power-on time of display panel 5 can be adjusted, so as to be carried out to display panel 5
The debugging of related electric performance.
Display panel debug circuit further includes first diode D1 in one of the embodiments,.First diode D1's
Anode connects the third bouncing pilotage of the first bridle wire apparatus 21 for connecting debugging power supply 4, the cathode of first diode D1.One or two pole
Pipe D1 is for protecting circuit, and when debugging power supply 4 and being reversely connected, circuit is obstructed, to prevent circuit from damaging.
Display panel debug circuit further includes the second diode D2 in one of the embodiments,.Second diode D2's
Anode connects the 6th bouncing pilotage of the second bridle wire apparatus 22 for connecting power supply 3, the cathode of the second diode D2.Two or two pole
Pipe D2 is for protecting circuit, and when power supply 3 is reversely connected, circuit is obstructed, to prevent circuit from damaging.
Display panel debug circuit, which is additionally provided with, in one of the embodiments, is used to indicate debugging power supply 4 is connected first
Light emitting diode D3.The third bouncing pilotage of anode the first bridle wire apparatus 21 of connection of first light emitting diode D3, the first light-emitting diodes
The cathode of pipe D3 is grounded.When debugging the connection of power supply 4, the first light emitting diode D3 conducting shines, to indicate that debugging power supply 4 connects
It is logical.
Optionally, display panel debug circuit is additionally provided with the second light emitting diode D4 for being used to indicate the connection of power supply 3.
6th bouncing pilotage of anode the second bridle wire apparatus 22 of connection of the second light emitting diode D4, the cathode of the second light emitting diode D4 connect
Ground.When power supply 3 is connected, the second light emitting diode D4 conducting shines, to indicate that power supply 3 is connected.
Optionally, display panel debug circuit is additionally provided with the first fuse F1 and the second fuse F2.First fuse F1
First end for connecting power supply 3, the second end of the first fuse F1 connects the 6th bouncing pilotage of the second bridle wire apparatus 22.The
The first end of two fuse F2 connects the first bridle wire apparatus 21 for connecting debugging power supply 4, the second end of the second fuse F2
Third bouncing pilotage.Optionally, the first fuse F1 and the second fuse F2 is F0603FA5000V032T model fuse.
Optionally, display panel debug circuit is additionally provided with derailing switch 9.The first switch end of derailing switch 9 is used for and master control electricity
The power supply 3 on road connects, and the second switch end of derailing switch 9 is jumped by the 6th of the second bridle wire apparatus of fuse F1 connection 22
Needle.
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. display panel debug circuit characterized by comprising
Voltage transformation module carries out electricity for connecting the power supply of governor circuit, and to the power supply of the governor circuit
Pressure conversion, output driving supply voltage；The power supply is regulated power supply, what the governor circuit was used to control the display panel
Picture is shown；
Voltage selecting unit, for connecting the power supply, debugging power supply and the voltage transformation module of the governor circuit,
And the voltage perhaps voltage of the debugging power supply or the drive of the selection output power supply is selected to display panel
Dynamic supply voltage.
2. display panel debug circuit according to claim 1, which is characterized in that the voltage selecting unit includes first
Bridle wire apparatus and the second bridle wire apparatus；
First bridle wire apparatus includes the first jumper cap, the first bouncing pilotage, the second bouncing pilotage and third bouncing pilotage；The second wire jumper dress
It sets including the second jumper cap, the forth jump needle, the fifth jump needle and the 6th bouncing pilotage；
First bouncing pilotage connects the output end of the voltage transformation module, and second bouncing pilotage connects the forth jump needle, institute
Third bouncing pilotage is stated for connecting the debugging power supply；
The fifth jump needle is for connecting the display panel, and the 6th bouncing pilotage is for connecting the power supply；
First bouncing pilotage and second bouncing pilotage is connected for selecting in first jumper cap, or the third is connected in selection
Bouncing pilotage and second bouncing pilotage；
The forth jump needle and the fifth jump needle, or selection conducting the described 6th is connected for selecting in second jumper cap
Bouncing pilotage and the fifth jump needle.
3. display panel debug circuit according to claim 2, which is characterized in that be additionally provided with feedback regulating circuit；
The feedback regulating circuit is used to acquire the output voltage information of the voltage transformation module, and feeds back to the voltage and turn
Change the mold block；The voltage transformation module keeps the driving supply voltage to stablize according to the feedback information of the feedback regulating circuit
Output.
4. display panel debug circuit according to claim 3, which is characterized in that the voltage transformation module is buck
Translation circuit chip, the feedback regulating circuit include first resistor and second resistance；
The first end of the first resistor connects the output end of the Buck conversion circuit chip, and the second of the first resistor
End is separately connected the first end of the second resistance and the feedback end of the Buck conversion circuit chip, the second resistance
Second end ground connection.
5. display panel debug circuit according to claim 2, which is characterized in that further include switch unit；The switch
The first switch end of unit connects the fifth jump needle of second bridle wire apparatus, and the second switch end of the switch unit is for connecting
The display panel is connect, the control terminal of the switch unit connects the governor circuit；The switch unit is used in the master
Control on or off under the control of circuit.
6. display panel debug circuit according to claim 5, which is characterized in that the switch unit is field-effect tube,
The source electrode of the field-effect tube connects the fifth jump needle of second bridle wire apparatus, and the drain electrode of the field-effect tube is for connecting institute
Display panel is stated, the grid of the field-effect tube is for connecting the governor circuit.
7. display panel debug circuit according to claim 6, which is characterized in that further include current regulation unit；
The current regulation unit includes 3rd resistor, variable resistance and switching tube；
The first end of the 3rd resistor connects the source electrode of the field-effect tube；
First fixing end of the variable resistance is separately connected the second end of the 3rd resistor and the grid of the field-effect tube
Pole, the second fixing end of the variable resistance connect the first switch end of the switching tube, and the adjustable side of the variable resistance connects
Connect the first switch end of the switching tube or the second end of the connection 3rd resistor；
The second switch end of the switching tube is grounded, and the control terminal of the switching tube is for connecting the governor circuit.
8. display panel debug circuit according to claim 1-7, which is characterized in that further include the one or two pole
Pipe, the anode of the first diode is for connecting the debugging power supply, the cathode connection described first of the first diode
The third bouncing pilotage of bridle wire apparatus；The first diode is for preventing the debugging reverse power connection.
9. display panel debug circuit according to claim 1-7, which is characterized in that further include the two or two pole
Pipe, the anode of second diode is for connecting the power supply, the cathode connection described second of second diode
6th bouncing pilotage of bridle wire apparatus；Second diode is for preventing the power supply to be reversely connected.
10. display panel debug circuit according to claim 1-7, which is characterized in that be additionally provided with and be used to indicate
The first light emitting diode that the debugging power supply is connected, and it is used to indicate the second light-emitting diodes that the power supply is connected
Pipe,
The anode of first light emitting diode is used to connect the third bouncing pilotage of first bridle wire apparatus, and described first shines two
The cathode of pole pipe is grounded；
The anode of second light emitting diode connects the 6th bouncing pilotage of second bridle wire apparatus, second light emitting diode
Cathode ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495547.6A CN110211520B (en) | 2019-06-10 | 2019-06-10 | Display panel debugging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495547.6A CN110211520B (en) | 2019-06-10 | 2019-06-10 | Display panel debugging circuit |
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| CN110211520B CN110211520B (en) | 2021-06-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065572A (en) * | 2011-10-21 | 2013-04-24 | 环旭电子股份有限公司 | Test system and test method thereof |
| CN103093714A (en) * | 2011-11-01 | 2013-05-08 | 天津三星电子有限公司 | Detecting device and detecting method of light emitting diode (LED) display screen driving board |
| CN106782237A (en) * | 2016-12-14 | 2017-05-31 | 深圳Tcl新技术有限公司 | The test device of lcd panel test plate and television set |
| US20190156719A1 (en) * | 2016-09-20 | 2019-05-23 | Apple Inc. | Sensing for compensation of pixel voltages |
| CN109856829A (en) * | 2019-04-18 | 2019-06-07 | 广西天山电子股份有限公司 | LCM, TP one test machine |
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2019
- 2019-06-10 CN CN201910495547.6A patent/CN110211520B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065572A (en) * | 2011-10-21 | 2013-04-24 | 环旭电子股份有限公司 | Test system and test method thereof |
| CN103093714A (en) * | 2011-11-01 | 2013-05-08 | 天津三星电子有限公司 | Detecting device and detecting method of light emitting diode (LED) display screen driving board |
| US20190156719A1 (en) * | 2016-09-20 | 2019-05-23 | Apple Inc. | Sensing for compensation of pixel voltages |
| CN106782237A (en) * | 2016-12-14 | 2017-05-31 | 深圳Tcl新技术有限公司 | The test device of lcd panel test plate and television set |
| CN109856829A (en) * | 2019-04-18 | 2019-06-07 | 广西天山电子股份有限公司 | LCM, TP one test machine |
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| CN110211520B (en) | 2021-06-18 |
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