CN107613619A - Lighting control circuit and signal split screen and with defencive function change lighting-up equipment - Google Patents
Lighting control circuit and signal split screen and with defencive function change lighting-up equipment Download PDFInfo
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- CN107613619A CN107613619A CN201710866079.XA CN201710866079A CN107613619A CN 107613619 A CN107613619 A CN 107613619A CN 201710866079 A CN201710866079 A CN 201710866079A CN 107613619 A CN107613619 A CN 107613619A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The present invention provides a kind of lighting control circuit and signal split screen and changes lighting-up equipment with defencive function.Lighting control circuit includes input-output unit, misplugs protection location and control unit；Input-output unit includes input interface module and at least two output interface modules；Input interface module includes at least three input interfaces；Output interface module includes at least three output interfaces；Whether whether control unit is used to control turns between the second input interface and the second output interface, and control and turned between the 3rd input interface and the 3rd output interface；Protection location is mispluged to be used to control output high power supply voltage signal to control when the second input interface does not access signal to first output interface and do not output voltage signal to the first output interface when the second input interface accesses low supply voltage signal.The present invention can light multi-disc screen by an ignition device, save cost, and can protect the output pin of ignition device, the phenomenon for avoiding each display panel to be measured from burning.
Description
Technical field
The present invention relates to lighting test technical field, more particularly to a kind of lighting control circuit and signal split screen and with protection
Power and energy lighting-up equipment.
Background technology
In the prior art, a lighting machine (such as can be pattern generator) is only capable of entering a piece of display panel to be measured
Row lighting test, it is therefore desirable to purchase the lighting machine of large batch of high cost.And the behaviour is being carried out to existing lighting-up equipment
When making, each interface that the output interface unit of lighting-up equipment can be caused because operator plug is improper includes can not correctly be connect
To the corresponding interface of a display panel to be measured, so as to which display panel to be measured can be caused to burn phenomenon.
The content of the invention
It is a primary object of the present invention to provide a kind of lighting control circuit and signal split screen and with defencive function transfer point
Lamp apparatus, solve a lighting machine in the prior art and be only capable of carrying out lighting test to a piece of display panel to be measured, and can occur
During lighting due to operator plug it is improper caused by display panel to be measured burn phenomenon the problem of.
In order to achieve the above object, it is to be measured for controlling ignition device the invention provides a kind of lighting control circuit
Display panel carries out lighting test, and the ignition device includes output interface unit, and the output interface unit includes being used to export
The first interface of high power supply voltage signal, the second interface for exporting low supply voltage signal and for output data voltage believe
Number the 3rd interface, the lighting control circuit include input-output unit, misplug protection location and control unit；The input
Output unit includes input interface module and at least two output interface modules；
The input interface module includes at least three input interfaces, an input interface and the output interface unit
Including an interface it is corresponding；
One output interface module includes at least three output interfaces, an output interface and the input interface mould
The input interface that block includes is corresponding；
The output interface that one output interface module includes is used to provide corresponding letter for a display panel to be measured
Number；
Whether described control unit is used to control turns between the second input interface and the second output interface, and controls the 3rd
Whether turned between input interface and the 3rd output interface；
It is described to misplug protection location and the first input interface, the second input interface and the first output interface connection, for working as
Control exports the high power supply voltage signal to the described first output during the second input interface access low supply voltage signal
Interface, controlled when second input interface does not access signal and do not output voltage signal to first output interface；
Wherein, N input interfaces are input interface corresponding with N interfaces, and N output interfaces are and N input interfaces
Corresponding output interface, N are positive integer.
During implementation, output interface corresponding with the same input interface that at least two output interface module includes
It is electrically connected to each other.
During implementation, the protection location that misplugs includes：
First resistor module, first end are connected with first input interface；
Second resistance module, first end are connected with the second end of the first resistor module, the second end and described second defeated
Incoming interface connects；
3rd resistor module, first end are connected with first input interface；
First controlling transistor, control pole are connected with the second end of the first resistor module, the first pole and the described 3rd
The second end connection of resistive module, the second pole ground connection；
4th resistive module, first end are connected with first input interface；
Second controlling transistor, control pole are connected with the first pole of first controlling transistor, the first pole and described the
The second end connection of four resistive modules；And
Comparator, first input end are connected with the second pole of second controlling transistor, the second input end grounding, output
End is connected with first output interface；
The comparator is used for the control when the magnitude of voltage of the voltage signal of second input access is more than 0 and passes through institute
State output end and export the high power supply voltage signal to first output interface, when second input does not access voltage letter
Number when control do not output voltage signal to first output interface.
During implementation, the protection location that misplugs also includes：5th resistive module, it is connected to first controlling transistor
Between the first input end of second pole and the comparator；And
Capacitance module, first end are connected with the control pole of first controlling transistor, the second end and the control crystal
The second pole connection of pipe.
During implementation, the output interface unit also includes being used to export the 4th interface of backlight control signal, for exporting
5th interface of backlight input high-voltage signal and the 6th interface for exporting backlight PWM dim signals；
The display panel to be measured is liquid crystal display panel, and described control unit is used to control the 4th input interface and the 4th
Turned between output interface, and control and turned between the 5th input interface and the 5th output interface, the 6th input interface of control and
Turned between 6th output interface；Or
The display panel to be measured is OLED display panel, and described control unit is used to control the 4th input interface and the 4th
It is not turned between output interface, and controls and be not turned between the 5th input interface and the 5th output interface, the input of control the 6th connects
It is not turned between mouth and the 6th output interface.
During implementation, lighting control circuit of the present invention also includes voltage protection unit；
The voltage protection unit includes multiple voltage protection devices；
The first end of one voltage protection device is connected with an output interface, the second end of the voltage protection device
Ground connection, the voltage protection device are used to control the output interface when the current potential of the output interface is more than the first predetermined potential
Current potential is maintained the second predetermined potential.
During implementation, lighting control circuit of the present invention also includes current protection unit；
The protection location that misplugs includes high power supply voltage signal output part；The protection location that misplugs is specifically used for working as institute
The height is exported by the high power supply voltage signal output part control when stating the second input interface access low supply voltage signal
Power supply voltage signal is to first output interface；
The current protection unit includes multiple current protection devices；
First current protection device is connected between the high power supply voltage signal output part and first output interface,
For controlling the high power supply when flowing through the current value of electric current of first current protection device and being more than the first predetermined current value
It is not turned between voltage signal output end and first output interface；
N current protection devices are connected between N input interfaces and N output interfaces, and the N electric currents are flowed through for working as
The current value of the electric current of protection device controls the N input interfaces and the N output interfaces when being more than N predetermined current values
Between be not turned on, N is integer more than 1.
During implementation, lighting control circuit of the present invention also includes voltage output indicating member；
The control source indicating member is connected with the first output interface, for exporting high electricity when first output interface
Voltage output indication signal is sent during the voltage signal of source.
During implementation, the voltage protection device is Transient Suppression Diode, the anode of the Transient Suppression Diode and an institute
State output interface connection, the minus earth of the Transient Suppression Diode；
The current protection device is resettable fuse；
The voltage output indicating member is light emitting diode, and the anode of the light emitting diode connects with the described first output
Mouth connection, the minus earth of the light emitting diode.
Lighting-up equipment, including ignition device are changed present invention also offers a kind of signal split screen and with defencive function, is also wrapped
Include above-mentioned lighting control circuit.
Compared with prior art, lighting control circuit and signal split screen of the present invention and with defencive function change lighting
Equipment can cause one group of input interface to correspond to multigroup output interface using input-output unit, and each group of output interface is for being
One display panel to be measured provides corresponding signal, so as to light multi-disc screen by an ignition device, saves cost；And this
Lighting control circuit described in inventive embodiments misplugs protection location to determine each interface of lighting-up equipment just by using described
True just lights each display panel to be measured when connection with the corresponding interface of each display panel to be measured, can protect ignition device
Output Pin (pin), extend the life-span of ignition device, and the phenomenon for avoiding each display panel to be measured from burning.
Brief description of the drawings
Fig. 1 is the structure chart of a specific embodiment of lighting control circuit of the present invention；
Fig. 2 is the circuit for the specific embodiment for mispluging protective unit that lighting control circuit of the present invention includes
Figure；
Fig. 3 is the circuit for the another specific embodiment for mispluging protective unit that lighting control circuit of the present invention includes
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Lighting control circuit described in the embodiment of the present invention, for controlling ignition device to carry out lighting for display panel to be measured
Test, the ignition device include output interface unit, and the output interface unit includes being used to export high power supply voltage signal
First interface, the second interface for exporting low supply voltage signal and the 3rd interface for output data voltage signal,
Lighting control circuit described in the embodiment of the present invention includes input-output unit, misplugs protection location and control single
Member；The input-output unit includes input interface module and at least two output interface modules；
The input interface module includes at least three input interfaces, an input interface and the output interface unit
Including an interface it is corresponding；
One output interface module includes at least three output interfaces, an output interface and the input interface mould
The input interface that block includes is corresponding；
The output interface that one output interface module includes is used to provide corresponding letter for a display panel to be measured
Number；
Whether described control unit is used to control turns between the second input interface and the second output interface, and controls the 3rd
Whether turned between input interface and the 3rd output interface；
It is described to misplug protection location and the first input interface, the second input interface and the first output interface connection, for working as
Control exports the high power supply voltage signal to the described first output during the second input interface access low supply voltage signal
Interface, controlled when second input interface does not access signal and do not output voltage signal to first output interface；
Wherein, N input interfaces are input interface corresponding with N interfaces, and N output interfaces are and N input interfaces
Corresponding output interface, N are positive integer.
In the above-described embodiments, that is, the first input interface is input interface corresponding with first interface, the second input connects
Mouth is input interface corresponding with second interface, and the 3rd input interface is input interface corresponding with the 3rd interface, and first exports
Interface is output interface corresponding with the first input interface, and the second output interface connects for output corresponding with the second input interface
Mouthful, the 3rd output interface is output interface corresponding with the 3rd input interface.
In practical operation, the ignition device can be pattern generator.
Lighting control circuit described in the embodiment of the present invention can cause one group of input to connect by using input-output unit
The corresponding multigroup output interface of mouth, each group of output interface are used to provide corresponding signal for a display panel to be measured, so as to
Multi-disc screen is lighted by an ignition device, saves cost.
And the lighting control circuit described in the embodiment of the present invention can be connect by mispluging protection location in the second input interface
The first output interface that just control output high power supply voltage signal to each output interface module includes when entering low supply voltage signal,
That is, the second interface that the lighting-up equipment is included by its output interface unit exports low supply voltage signal, and in reality
, can not correct quilt due to each interface that the improper output interface unit that cause lighting-up equipment of operator plug includes during operation
The corresponding interface of a display panel to be measured is connected to, so as to which display panel to be measured can be caused to burn phenomenon.Based on this, the present invention is implemented
Example described in lighting control circuit by using it is described misplug protection location determine each interface of lighting-up equipment correctly with respectively
Each display panel to be measured is just lighted when the corresponding interface connection of display panel to be measured, the output of ignition device can be protected
Pin (pin), extends the life-span of ignition device, and the phenomenon for avoiding each display panel to be measured from burning.
And the lighting control circuit described in the embodiment of the present invention is defeated by control unit the second input interface of control and second
Whether turned between outgoing interface, and control and whether turned between the 3rd input interface and the 3rd output interface, so as to convenient
Control ignition device to provide low supply voltage signal and data voltage signal for specific display panel to be measured.
In the above-described embodiments, high power supply voltage signal of the first interface for exporting unlatching display panel to be measured, second
Interface can be the interface of ground connection；The input-output unit can be crossover sub, and one group of input interface corresponds to multigroup output
Interface；
Described control unit can include being connected to switch or wire jumper resistance between each port, control each input interface and
Whether turned between each output interface.
The embodiment of the present invention integrates signal conversion split screen circuit and operator signal wire misplugs defencive function, ingenious solution
Determine and a lighting machine while lighted multigroup display screen and the scheme with defencive function.And the lighting control described in the embodiment of the present invention
Circuit processed can also export to be measured display of the different size of high power supply voltage signal to different model by the first output interface
Panel, general Multiple Type so that a lighting control circuit is adapted to the display panel to be measured of most of different cut-in voltages, overcomes
Traditional lighting machine can only drive one piece of display panel to be measured not have the defects of defencive function.
Lighting control circuit described in the embodiment of the present invention uses the technological means of new lighting split screen, reaches and lights multi-disc
The technique effect of display screen, so as to solve equipment investment and the high technical problem of maintenance cost, be on production line quick production and
Save equipment investment and greatly help is provided.Pattern generator is connected to using the lighting control circuit described in the embodiment of the present invention
Output end, reduce the usage amount and maintenance cost of equipment, at the same can effectively protect pattern generator output Pin (pipe
Pin), and it is easy to maintenance.
Illustrate lighting control circuit of the present invention below by a specific embodiment.
As shown in figure 1, a specific embodiment of lighting control circuit of the present invention includes input-output unit, mispluged
Protection location 30 and control unit 40；The input-output unit includes input interface module 101, the first output interface module
201 and second output interface module 202；
The input interface module 101 includes the first input interface IJ1, the second input interface IJ2 and the 3rd input interface
IJ3；
The first output interface that first output interface module 201 includes is denoted as OJ11, the first output interface module
201 the second output interfaces included are denoted as OJ12, and the 3rd output interface that the first output interface module 201 includes is denoted as
OJ13；
The first output interface that second output interface module 202 includes is denoted as OJ21, the second output interface module
202 the second output interfaces included are denoted as OJ22, and the 3rd output interface that the second output interface module 202 includes is denoted as
OJ23；
Described control unit 40 is wrapped with the second input interface IJ2, the 3rd input interface IJ3, the first output interface module 201
The the second output interface OJ12 included, the 3rd output interface OJ13 that the first output interface module 201 includes, the second output interface mould
The second output interface OJ22 that block 202 includes, the 3rd output interface OJ23 connections that the second output interface module 202 includes, use
Whether turned between the second output interface OJ12 for controlling the second input interface IJ2 and the first output interface module 201 to include,
Control and whether turn between the second output interface OJ22 that the second input interface IJ2 and the second output interface module 202 include, and
Control and whether turn between the 3rd output interface OJ13 that the 3rd input interface IJ3 and the first output interface module 201 include, control
Make and whether turn between the 3rd output interface OJ23 that the 3rd input interface IJ3 and the second output interface module 202 include；
It is described to misplug the input interface IJ1 of protection location 30 and first, the second input interface IJ2, first output interface
The first output interface OJ21 that the first output interface OJ11 and second output interface module 202 that module 201 includes include
Connection, for the control output high power supply voltage signal when the second input interface IJ2 accesses low supply voltage signal
The the first output interface OJ11 and second output interface module 202 included to first output interface module 201 includes
The first output interface OJ21, when the second input interface IJ2 does not access signal control do not output voltage signal to described
The the first output interface OJ11 and second output interface module 202 that first output interface module 201 includes include first
Output interface OJ21.
In practical operation, the output interface module that the input-output unit includes can use general row's pin type to export
Interface, external 1 point of 2 wire rod or single-turn wiring material.General row's pin type output interface can be double or multiple rows of.
In the specific implementation, what at least two output interface module included is corresponding defeated with the same input interface
Outgoing interface is electrically connected to each other, namely between each group output interface it is parallel with one another.
Specifically, in the specific embodiment shown in Fig. 1, OJ11 can electrically connect with OJ21, and OJ12 can be with OJ22 electricity
Connection, OJ13 can electrically connect with OJ23.
Specifically, the protection location that misplugs can include：
First resistor module, first end are connected with first input interface；
Second resistance module, first end are connected with the second end of the first resistor module, the second end and described second defeated
Incoming interface connects；
3rd resistor module, first end are connected with first input interface；
First controlling transistor, control pole are connected with the second end of the first resistor module, the first pole and the described 3rd
The second end connection of resistive module, the second pole ground connection；
4th resistive module, first end are connected with first input interface；
Second controlling transistor, control pole are connected with the first pole of first controlling transistor, the first pole and described the
The second end connection of four resistive modules；And
Comparator, first input end are connected with the second end of second controlling transistor, the second input end grounding, output
End is connected with first output interface；
The comparator is used for the control when the magnitude of voltage of the voltage signal of second input access is more than 0 and passes through institute
State output end and export the high power supply voltage signal to first output interface, when second input does not access voltage letter
Number when control do not output voltage signal to first output interface.
In practical operation, first controlling transistor can be triode, TFT (thin film transistor (TFT)) or metal-oxide-semiconductor；Institute
It can also be triode, TFT (thin film transistor (TFT)) or field-effect transistor to state the second controlling transistor.When the above-mentioned control is brilliant
When body pipe is triode, control extremely base stage, first extremely can be emitter stage or colelctor electrode, and second extremely can be colelctor electrode or anti-
Emitter-base bandgap grading.When above-mentioned controlling transistor is TFT or field-effect transistor, control pole can be grid, and first extremely can be source electrode
Or drain electrode, second extremely can be drain electrode or source electrode.
Preferably, the protection location that misplugs also includes：5th resistive module, it is connected to first controlling transistor
Between the first input end of second pole and the comparator；And
Capacitance module, first end are connected with the control pole of first controlling transistor, the second end and the control crystal
The second pole connection of pipe.
Illustrate to misplug protective unit in lighting control circuit of the present invention below by a specific embodiment.
As shown in Fig. 2 the specific embodiment for mispluging protective unit includes：
First resistor R1, first end are connected with the first input interface IJ1；
Second resistance R2, first end are connected with the second end of the first resistor R1, and the second end connects with the described second input
Mouth IJ2 connections；
3rd resistor R3, first end are connected with the first input interface IJ1；
First control triode Q1, base stage are connected with the second end of the first resistor R1, colelctor electrode and the described 3rd electricity
R3 the second end connection is hindered, emitter stage is connected with ground terminal GND；
4th resistance R4, first end are connected with the first input interface IJ1；
Second control triode Q2, control pole are connected with the described first control triode Q1 colelctor electrode, colelctor electrode and institute
State the 4th resistance R4 the second end connection；
Comparator Cmp, first input end S1 are connected with the described second control triode Q2 emitter stage, the second input S2
It is connected with ground terminal GND, output end SO is connected with first output interface (not shown in Fig. 2)；
5th resistance R5, be connected to the described first emitter stage for controlling triode Q1 and the comparator Cmp first are defeated
Enter to hold between S1；And
Electric capacity C1, first end are connected with the described first control triode Q1 base stage, the second end and the control triode
Q1 emitter stage connection；
The comparator Cmp is used to control when the magnitude of voltage of the voltage signal of the second input S2 accesses is more than 0
The high power supply voltage signal is exported to first output interface by the output end SO, when the second input S2 not
Control does not output voltage signal to first output interface when accessing voltage signal.
In the specific embodiment shown in Fig. 2, Q1 and Q2 are NPN type triode.
Protection circuit is mispluged in of the invention as shown in Figure 2 at work, and when IJ2 is correctly inserted into, namely IJ2 correctly connects
During ground, Q1 cut-offs, the high power supply voltage signal of IJ1 inputs is connected to Q2 base stage by R3 so that Q2 is turned on, and comparator Cmp is obtained
After electricity, a bright screen is gone by output end SO output services voltages.If IJ2 is not connected to ground, namely IJ2 is not properly inserted letter
Number line, then Q1 turn on, Q2 cut-offs, comparator Cmp can not put bright screen without output.
In the specific implementation, IJ1 can input 3.3V-12V d. c. voltage signals.
In practical operation, the output interface unit can also include connecing for exporting the 4th of backlight control signal
Mouthful, the 5th interface for exporting backlight input high-voltage signal and for exporting backlight PWM (pulsewidth modulation) dim signal
Six interfaces；
When the display panel to be measured is liquid crystal display panel, described control unit be used for control the 4th input interface and
Turned between 4th output interface, and control and turned between the 5th input interface and the 5th output interface, the input of control the 6th connects
Turned between mouth and the 6th output interface；
When the display panel to be measured is OLED (Organic Light Emitting Diode) display panel, described control unit is used to control
Make and be not turned between the 4th input interface and the 4th output interface, and control between the 5th input interface and the 5th output interface not
Conducting, control and be not turned between the 6th input interface and the 6th output interface.
In the specific implementation, described control unit can use optional thumb-acting switch.
In practical operation, the backlight input high-voltage signal is used to light the LED (light-emitting diodes that backlight circuit includes
Pipe) particle.
In the specific implementation, the input interface module can also include other input interfaces, the output interface module
Other output interfaces can also be included.
Preferably, the lighting control circuit described in the embodiment of the present invention can also include voltage protection unit；
The voltage protection unit includes multiple voltage protection devices；
The first end of one voltage protection device is connected with an output interface, the second end of the voltage protection device
Ground connection, the voltage protection device are used to control the output interface when the current potential of the output interface is more than the first predetermined potential
Current potential is maintained the second predetermined potential.The voltage protection device was used for so that control should when the current potential of the output interface is excessive
The current potential clamper of output interface in the second predetermined potential, so that it is guaranteed that the circuit element that includes of display panel to be measured below from
The impact of transient state high-energy and damage, play over-voltage protecting function, production line or stove lighting can be caused not to cause burn-in
Phenomenon.
Specifically, the voltage protection device can be Transient Suppression Diode, the anode of the Transient Suppression Diode with
The one output interface connection, the minus earth of the Transient Suppression Diode.
In the specific implementation, the voltage protection device can be TVS (transient state suppression) diode, when TVS diode two
When end is subjected to the high energy impact events of moment, it can cause its impedance to reduce suddenly with high speed, while absorb one big electricity
Stream, by its both end voltage clamper one it is predetermined numerically, so that it is guaranteed that the circuit elements that display panel to be measured below includes
Part damages from the impact of transient state high-energy, plays over-voltage protecting function, production line or stove lighting can be caused not to make
Into burn-in phenomenon.
Preferably, the lighting control circuit described in the embodiment of the present invention can also include current protection unit；
The protection location that misplugs includes high power supply voltage signal output part；The protection location that misplugs is specifically used for working as institute
The height is exported by the high power supply voltage signal output part control when stating the second input interface access low supply voltage signal
Power supply voltage signal is to first output interface；
The current protection unit includes multiple current protection devices；
First current protection device is connected between the high power supply voltage signal output part and first output interface,
For controlling the high power supply when flowing through the current value of electric current of first current protection device and being more than the first predetermined current value
It is not turned between voltage signal output end and first output interface；
N current protection devices are connected between N input interfaces and N output interfaces, and the N electric currents are flowed through for working as
The current value of the electric current of protection device controls the N input interfaces and the N output interfaces when being more than N predetermined current values
Between be not turned on, N is integer more than 1.
In practical operation, the current protection device can be resettable fuse, when flowing through the resettable fuse
Electric current current value it is excessive when, resettable fuse can control to be not turned between corresponding input interface and output interface,
With protection circuit, after circuit recovers normal, resettable fuse can be with normal work.
As shown in figure 3, shown in Fig. 2 misplug the specific embodiment of protective unit on the basis of, in the comparator Cmp
Output end SO and each first output interface (being not shown in figure 3) between be additionally provided with resettable fuse Fu；
In practical operation, it is relevant that the selection of the resettable fuse Fu is connected thereto several first output interfaces, when
When the number of first output interface of Fu connections is more, Fu maximum fault current is bigger；When the first output interface of Fu connections
Number it is few when, Fu maximum fault current is smaller.
It is of the invention as shown in Figure 3 to misplug protective unit and ensure in plug signal by using resettable fuse
Overcurrent caused by when line is crooked carries out overcurrent protection.
Preferably, the lighting control circuit described in the embodiment of the present invention also includes voltage output indicating member；
The control source indicating member is connected with the first output interface, for exporting high electricity when first output interface
Voltage output indication signal is sent during the voltage signal of source.
Specifically, the voltage output indicating member can be light emitting diode, the anode of the light emitting diode and institute
The connection of the first output interface is stated, the minus earth of the light emitting diode, can so realize control source band lamp prompting (when having
During control source, light emitting diode is bright；When not having control source, light emitting diode does not work).
Signal split screen described in the embodiment of the present invention and lighting-up equipment, including ignition device are changed with defencive function, also wrapped
Include above-mentioned lighting control circuit.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. lighting control circuit, for controlling ignition device to carry out lighting test, the lighting dress for display panel to be measured Put including output interface unit, the output interface unit includes being used to export the first interface of high power supply voltage signal, for defeated Go out the second interface of low supply voltage signal and the 3rd interface for output data voltage signal, it is characterised in that the point Lamp control circuit includes input-output unit, misplugs protection location and control unit；The input-output unit connects including input Mouth mold block and at least two output interface modules；The input interface module includes at least three input interfaces, and an input interface includes with the output interface unit An interface it is corresponding；One output interface module includes at least three output interfaces, an output interface and the input interface module bag The input interface included is corresponding；The output interface that one output interface module includes is used to provide corresponding signal for a display panel to be measured；Whether described control unit is used to control turns between the second input interface and the second output interface, and controls the 3rd input Whether turned between interface and the 3rd output interface；It is described to misplug protection location and the first input interface, the second input interface and the first output interface connection, for when described Control exports the high power supply voltage signal to first output interface when second input interface accesses low supply voltage signal, When second input interface does not access signal, control does not output voltage signal to first output interface；Wherein, N input interfaces are input interface corresponding with N interfaces, and N output interfaces are corresponding with N input interfaces Output interface, N is positive integer.
- 2. lighting control circuit as claimed in claim 1, it is characterised in that what at least two output interface module included Output interface corresponding with the same input interface is electrically connected to each other.
- 3. lighting control circuit as claimed in claim 2, it is characterised in that the protection location that misplugs includes：First resistor module, first end are connected with first input interface；Second resistance module, first end are connected with the second end of the first resistor module, and the second end connects with the described second input Mouth connection；3rd resistor module, first end are connected with first input interface；First controlling transistor, control pole are connected with the second end of the first resistor module, the first pole and the 3rd resistor The second end connection of module, the second pole ground connection；4th resistive module, first end are connected with first input interface；Second controlling transistor, control pole are connected with the first pole of first controlling transistor, the first pole and the described 4th electricity Hinder the second end connection of module；AndComparator, first input end are connected with the second pole of second controlling transistor, the second input end grounding, output end with The first output interface connection；The comparator is used to control by described defeated when the magnitude of voltage of the voltage signal of second input access is more than 0 Go out end and export the high power supply voltage signal to first output interface, when second input does not access voltage signal Control does not output voltage signal to first output interface.
- 4. lighting control circuit as claimed in claim 3, it is characterised in that the protection location that misplugs also includes：5th electricity Module is hindered, is connected between the second pole of first controlling transistor and the first input end of the comparator；AndCapacitance module, first end are connected with the control pole of first controlling transistor, the second end and the controlling transistor Second pole connects.
- 5. lighting control circuit as claimed in claim 1, it is characterised in that the output interface unit also includes being used to export 4th interface of backlight control signal, for export backlight input high-voltage signal the 5th interface and for export backlight PWM adjust 6th interface of optical signal；The display panel to be measured is liquid crystal display panel, and described control unit is used to control the 4th input interface and the 4th output Turned between interface, and control and turned between the 5th input interface and the 5th output interface, control the 6th input interface and the 6th Turned between output interface；OrThe display panel to be measured is OLED display panel, and described control unit is used to control the 4th input interface and the 4th output Be not turned between interface, and control and be not turned between the 5th input interface and the 5th output interface, the 6th input interface of control and It is not turned between 6th output interface.
- 6. lighting control circuit as claimed in claim 5, it is characterised in that also including voltage protection unit；The voltage protection unit includes multiple voltage protection devices；The first end of one voltage protection device is connected with an output interface, the second termination of the voltage protection device Ground, the voltage protection device are used to control the electricity of the output interface when the current potential of the output interface is more than the first predetermined potential Position is maintained the second predetermined potential.
- 7. lighting control circuit as claimed in claim 6, it is characterised in that also including current protection unit；The protection location that misplugs includes high power supply voltage signal output part；The protection location that misplugs is specifically used for when described the The high power supply is exported by the high power supply voltage signal output part control when two input interfaces access low supply voltage signal Voltage signal is to first output interface；The current protection unit includes multiple current protection devices；First current protection device is connected between the high power supply voltage signal output part and first output interface, is used for The high power supply voltage is controlled when flowing through the current value of electric current of first current protection device and being more than the first predetermined current value It is not turned between signal output part and first output interface；N current protection devices are connected between N input interfaces and N output interfaces, and the N current protections are flowed through for working as The current value of the electric current of device is controlled between the N input interfaces and the N output interfaces when being more than N predetermined current values It is not turned on, N is the integer more than 1.
- 8. lighting control circuit as claimed in claim 7, it is characterised in that also including voltage output indicating member；The control source indicating member is connected with the first output interface, for exporting high power supply electricity when first output interface Voltage output indication signal is sent when pressing signal.
- 9. lighting control circuit as claimed in claim 8, it is characterised in that the voltage protection device is that transient state suppresses two poles Pipe, the anode of the Transient Suppression Diode are connected with an output interface, the minus earth of the Transient Suppression Diode；The current protection device is resettable fuse；The voltage output indicating member is light emitting diode, and the anode of the light emitting diode connects with first output interface Connect, the minus earth of the light emitting diode.
- 10. a kind of signal split screen and change lighting-up equipment, including ignition device with defencive function, it is characterised in that also include such as Lighting control circuit in claim 1 to 9 described in any claim.
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| CN201710866079.XA CN107613619B (en) | 2017-09-22 | 2017-09-22 | Lighting control circuit and signal split screen and with defencive function convert lighting-up equipment |
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| CN201710866079.XA CN107613619B (en) | 2017-09-22 | 2017-09-22 | Lighting control circuit and signal split screen and with defencive function convert lighting-up equipment |
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| CN107613619B (en) | 2019-06-04 |
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