CN103369770B - Light fixture thermal-shutdown circuit and device - Google Patents
Light fixture thermal-shutdown circuit and device Download PDFInfo
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- CN103369770B CN103369770B CN201210093483.5A CN201210093483A CN103369770B CN 103369770 B CN103369770 B CN 103369770B CN 201210093483 A CN201210093483 A CN 201210093483A CN 103369770 B CN103369770 B CN 103369770B
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Abstract
A kind of light fixture thermal-shutdown circuit; including for monitoring lamp temperatures and temperature sensitive module, comparison module, feedback module and the switch module of the exportable voltage varied with temperature; wherein; the first input end of described comparison module electrically connects with the output of described temperature sensitive module; second input of described comparison module connects reference voltage; the output of described comparison module connects the control end of described switch module, and described comparison module triggers the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；Temperature sensitive module monitors light fixture is set; its output voltage changes with the temperature change of light fixture; the output voltage change of temperature sensitive module when lamp temperatures is too high so that comparison module triggers the switch module output signal of telecommunication and can serve as the switch control rule to lamp power, it is achieved the too high protection of temperature.Additionally, also disclose a kind of light fixture over-temperature protection device.
Description
Technical field
The present invention relates to light fixture protection field, particularly relate to a kind of light fixture thermal-shutdown circuit and device.
Background technology
At present, along with the development of society's science and technology, the design and fabrication ability of light fixture is improving constantly, but light fixture
In use, the shortcoming of its heating or heat insulation aspect also fails to well solve, and special at some
Light fixture particular application, has strict demand to the temperature of light fixture, once occurs in that higher than the temperature set,
Then light fixture easily breaks down or directly damages and can not use.
Summary of the invention
Based on this, it is necessary to for the temperature of light fixture too high time, light fixture easily breaks down or directly damages
Problem, it is provided that a kind of protect the light fixture thermal-shutdown circuit that is not damaged by of light fixture when temperature is too high.
Additionally, it is necessary to for the temperature of light fixture too high time, light fixture easily breaks down or directly damages
Problem, it is provided that a kind of light fixture over-temperature protection device protecting light fixture to be not damaged by when temperature is too high.
A kind of light fixture thermal-shutdown circuit, including for monitoring lamp temperatures and the exportable electricity varied with temperature
Temperature sensitive module, comparison module, feedback module and the switch module of pressure, wherein,
The first input end of described comparison module electrically connects with the output of described temperature sensitive module, described compares mould
Second input of block connects reference voltage, and the output of described comparison module connects the control of described switch module
End processed, described comparison module triggers the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
The output of comparison module described in the input of described feedback module connects, the output of described feedback module
End is connected with the first input end of described comparison module, and described feedback module is for making when described light fixture excess temperature
Described comparison module keeps triggering the output of described switch module for controlling the signal of telecommunication that described light fixture turns off.
Wherein in an embodiment, described comparison module includes comparator, the homophase input of described comparator
End is connected with output, the output of described feedback module of described temperature sensitive module simultaneously, described comparator
Inverting input connects described reference voltage, and the output of described comparator is simultaneously connected with described switch module
Controlling end, the input of described feedback module, the output voltage of described temperature sensitive module is bigger than described reference voltage
Shi Suoshu comparison module output high level triggers the output of described switch module for controlling the electricity that described light fixture turns off
Signal.
Wherein in an embodiment, described comparison module also includes current-limiting resistance R3, earth resistance R4, divides
Piezoresistance R5, pull down resistor R6 and current-limiting resistance R8, wherein,
The in-phase input end of described comparator is connected by the output of described current-limiting resistance R3 with described temperature sensitive module
Connect；
The inverting input of described comparator connects described reference voltage by described divider resistance R5, and passes through
Described earth resistance R4 ground connection；
The output of described comparator connects the control end of described switch module by described current-limiting resistance R8, and
By described pull down resistor R6 ground connection.
Wherein in an embodiment, described feedback module includes the first diode, output resistance R7, wherein,
The anode of described first diode is connected with the output of described comparator, the moon of described first diode
Pole is connected with the in-phase input end of described comparator by described output resistance R7.
Wherein in an embodiment, described switch module includes switching tube Q1, photoelectrical coupler, described light
Electric coupler includes light emitting source and light-receiving device, wherein,
The end that controls of described switching tube Q1 controls the defeated of end and described comparison module as described switch module
Going out end to connect, the input of described switching tube Q1 is connected with the output of the light emitting source of described photoelectrical coupler,
The output head grounding of described switching tube Q1；
The input of the light emitting source of described photoelectrical coupler connects power supply, the light-receiving device of described photoelectrical coupler
Output head grounding, the input of the light-receiving device of described photoelectrical coupler is defeated as the output of described switch module
Go out for controlling the low level signal of telecommunication that described light fixture turns off.
Wherein in an embodiment, also include division module, described division module include divider resistance R1,
Earth resistance R2 and filter capacitor C1, wherein,
One end of described divider resistance R1 is connected with the output of described temperature sensitive module, described divider resistance R1
The other end be connected with the first input end of described comparison module as the output of division module, described dividing potential drop
The other end of resistance R1 is also by described earth resistance R2 ground connection, described filter capacitor C1 and earth resistance
R2 is in parallel.
A kind of light fixture over-temperature protection device, including light fixture thermal-shutdown circuit, described light fixture thermal-shutdown circuit
Including for monitoring lamp temperatures and the temperature sensitive module of the exportable voltage varied with temperature, comparison module, anti-
Feedback module and switch module, wherein,
The first input end of described comparison module electrically connects with the output of described temperature sensitive module, described compares mould
Second input of block connects reference voltage, and the output of described comparison module connects the control of described switch module
End processed, described comparison module triggers the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
The output of comparison module described in the input of described feedback module connects, the output of described feedback module
End is connected with the first input end of described comparison module, and described feedback module is for making when described light fixture excess temperature
Described comparison module keeps triggering the output of described switch module for controlling the signal of telecommunication that described light fixture turns off.
Wherein in an embodiment, described comparison module includes comparator, the homophase input of described comparator
End is connected with output, the output of described feedback module of described temperature sensitive module simultaneously, described comparator
Inverting input connects described reference voltage, and the output of described comparator is simultaneously connected with described switch module
Controlling end, the input of described feedback module, the output voltage of described temperature sensitive module is bigger than described reference voltage
Shi Suoshu comparison module output high level triggers the output of described switch module for controlling the electricity that described light fixture turns off
Signal.
Wherein in an embodiment, described comparison module also includes current-limiting resistance R3, earth resistance R4, divides
Piezoresistance R5, pull down resistor R6 and current-limiting resistance R8, wherein,
The in-phase input end of described comparator is connected by the output of described current-limiting resistance R3 with described temperature sensitive module
Connect；
The inverting input of described comparator connects described reference voltage by described divider resistance R5, and passes through
Described earth resistance R4 ground connection；
The output of described comparator connects the control end of described switch module by described current-limiting resistance R8, and
By described pull down resistor R6 ground connection.
Wherein in an embodiment, described feedback module includes the first diode, output resistance R7, wherein,
The anode of described first diode is connected with the output of described comparator, the moon of described first diode
Pole is connected with the in-phase input end of described comparator by described output resistance R7.
Said temperature is crossed light fixture thermal-shutdown circuit and is arranged temperature sensitive module monitors light fixture, and its output voltage is with light fixture
Temperature change and change, when lamp temperatures is too high temperature sensitive module output voltage produce change so that ratio
Relatively module triggers the switch module output signal of telecommunication and can serve as the switch control rule to lamp power, it is achieved temperature mistake
High protection, makes comparison module keep triggering switch module output additionally, arrange feedback module when light fixture excess temperature
For controlling the signal of telecommunication that light fixture turns off so that light fixture thermal-shutdown circuit is more reliable.Additionally, also disclose
A kind of light fixture over-temperature protection device.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the light fixture thermal-shutdown circuit in a preferred embodiment；
Fig. 2 is the circuit theory diagrams of the light fixture thermal-shutdown circuit in a preferred embodiment.
Detailed description of the invention
As it is shown in figure 1, be the light fixture thermal-shutdown circuit of an embodiment.This light fixture thermal-shutdown circuit includes:
Temperature sensitive module 110, comparison module 120, switch module 130 and feedback module 140.
The first input end of comparison module 120 electrically connects with the output of temperature sensitive module 110, comparison module 120
Second input connect reference voltage, the control of the output connecting valve module 130 of comparison module 120
End, comparison module 120 triggers switch module 130 and exports for controlling the signal of telecommunication that light fixture turns off；Feedback mould
The output of the input comparison module 120 of block 140 connects, the output of feedback module 140 with compare mould
The first input end of block 120 connects, and feedback module 140 is for making comparison module 120 protect when light fixture excess temperature
Hold and trigger switch module output for controlling the signal of telecommunication that light fixture turns off.
Light fixture thermal-shutdown circuit monitors light fixture by arranging temperature sensitive module 110, and its output voltage is with light fixture
Temperature change and change, when lamp temperatures is too high temperature sensitive module 110 output voltage produce change so that
Comparison module 120 triggers switch module 130 and exports the signal of telecommunication and can serve as the switch control rule to lamp power,
Realize the too high protection of temperature；Comparison module 120 is made to protect additionally, arrange feedback module 140 when light fixture excess temperature
Hold triggering switch module 130 and export for controlling the signal of telecommunication that light fixture turns off so that light fixture thermal-shutdown circuit
More reliable.
Temperature sensitive module 110 is the temperature sensitive chip of an output voltage variation with temperature, its output when temperature raises
Voltage becomes big therewith.Additionally, temperature sensitive module 110 can also is that the thermistor including positive temperature coefficient, heat
The resistance of quick resistance increases with the rising of temperature, thus the voltage at thermistor two ends increases, then temperature sensitive
The output voltage of module 110 can be the voltage at these thermistor two ends.
As in figure 2 it is shown, in the present embodiment, the output voltage of temperature sensitive module 110 compares time bigger than reference voltage
Module 120 exports high level triggering switch module 130 and exports for controlling the signal of telecommunication that light fixture turns off.Relatively
Module 120 includes comparator U1, current-limiting resistance R3, earth resistance R4, divider resistance R5, pull down resistor
R6 and current-limiting resistance R8.
The in-phase input end 3 of comparator U1 simultaneously with the output of temperature sensitive module 110, feedback module 140
Output connects, and the inverting input 2 of comparator U1 connects reference voltage, the output 1 of comparator U1
Be simultaneously connected with switch module 120 controls end, the input of feedback module 140.The power supply of comparator U1 is defeated
Enter end to be connected with power Vcc, the earth terminal ground connection of comparator U1.The in-phase input end 3 of comparator U1 is defeated
Enter is the output voltage of temperature sensitive module 110, in the present embodiment, when the output voltage ratio of temperature sensitive module 110
When reference voltage is big, the output 1 of comparator U1 exports high level；Otherwise, then output low level.At it
In his embodiment, coordinate the change of other parameters, comparator U1 can replace with operational amplifier.
The in-phase input end 3 of comparator U1 is connected with the output of temperature sensitive module 110 by current-limiting resistance R3,
The first input end that one end is comparison module 120 that i.e. current-limiting resistance R3 is not connected with comparator U1, current limliting
The voltage current limiting protective effect that temperature sensitive module 110 is inputted by resistance R3 to comparator U1.Comparator U1
Inverting input 2 connect reference voltage by divider resistance R5, and by described earth resistance R4 ground connection,
The second output that one end is comparison module 120 that i.e. divider resistance R5 is not connected with comparator U1, ground connection
Resistance R4 and divider resistance R5 forms potential-divider network, and the reference voltage inputted is had dividing potential drop metering function.
The output 1 of the comparator U1 control end by current-limiting resistance R8 connecting valve module 130, and lead to
Crossing pull down resistor R6 ground connection, pull down resistor R6 is for improving the compatibility of comparator U1 output level, same
Time current limiting effect.In other embodiments, coordinate the change of other module parameters, above-mentioned current-limiting resistance R3,
Divider resistance R4, earth resistance R5, pull down resistor R6 and current-limiting resistance R8 all can omit or with several
Resistance connection in series-parallel is replaced.
Switch module 130 includes switching tube Q1, photoelectrical coupler OPT1, and photoelectrical coupler OPT1 includes
Light emitting source and light-receiving device.
The end that controls of switching tube Q1 connects with the output of comparison module 120 as the control end of switch module 130
Connecing, the input of switching tube Q1 is connected with the output of the light emitting source of photoelectrical coupler OPT1, switching tube
The output head grounding of Q1；The input of the light emitting source of photoelectrical coupler OPT1 connects power Vcc, light thermocouple
The output head grounding of the light-receiving device of clutch OPT1, the input of the light-receiving device of photoelectrical coupler OPT1 is as opening
Close the output output of module 130 for controlling the low level signal of telecommunication that light fixture turns off.In the present embodiment, lamp
During tool excess temperature, when the output voltage of temperature sensitive module 110 is bigger than reference voltage, comparison module 120 exports high electricity
Putting down makes switching tube Q1 turn on, then photoelectrical coupler OPT1 light emitting source is luminous so that light-receiving device works, light
The input end grounding of device forms low level.
Photoelectrical coupler OPT1, be the media transmission signal of telecommunication with light a kind of electrical-optical-electrical switching device.Light
Electric coupler OPT1 can be understood as it and includes controlling partly and switch sections, i.e. light emitting source and light-receiving device, and two
Person is assembled in same airtight housing, to each other with transparent insulator isolation.In other embodiments,
Photoelectric coupling unit for promoting inhibition 122 can be replaced with DC relay.Wherein, the coil of DC relay is as control
Part is equivalent to light emitting source and plays control action, DC relay switch contact be equivalent to light-receiving device and play switch
Effect.
In the present embodiment, switching tube Q1 is NPN type triode, in other embodiments, and switching tube Q1
Can substitute with field-effect transistors or integrated circuit.
Feedback module 140 includes the first diode D1, output resistance R7.The anode of the first diode D1 with
The output of comparator U1 connects, and the negative electrode of the first diode D1 is by output resistance R7 and comparator U1
In-phase input end 3 connect.In the present embodiment, during light fixture excess temperature, comparison module 120 exports high level,
This high level is fed back to the in-phase input end 3 of comparator U1 by feedback module 140, so can make comparator
The voltage of the in-phase input end 3 of U1 is always big than the magnitude of voltage of its inverting input 2, makes comparator U1's
Output 1 keeps output high level, then the output of switch module 130 is locked at low level control lamp
The power-supply controller of electric (not shown) of tool closes light fixture.
In a preferred embodiment, light fixture thermal-shutdown circuit also includes division module 150.Division module 150
Including divider resistance R1, earth resistance R2 and filter capacitor C1.
One end of divider resistance R1 is connected with the output of temperature sensitive module 110, the other end of divider resistance R1
It is connected with the first input end of comparison module 120 as the output of division module 150, divider resistance R1's
The other end is also by earth resistance R2 ground connection, and filter capacitor C1 is in parallel with earth resistance R2.Divider resistance
R1 and earth resistance R2 form potential-divider network, to the output voltage of temperature sensitive module 110 have dividing potential drop current limliting to protect
Protecting effect, filter capacitor C1 can filter the voltage pulsation of the output voltage of temperature sensitive module 110.Real at other
Executing in example, divider resistance R1 and earth resistance R2 can omit or replace with several resistance connection in series-parallel.
A kind of light fixture over-temperature protection device, including above-mentioned light fixture thermal-shutdown circuit, described light fixture excess temperature is protected
Protection circuit includes for monitoring lamp temperatures and the temperature sensitive module of the exportable voltage varied with temperature, comparing mould
Block, feedback module and switch module.
The first input end of described comparison module electrically connects with the output of described temperature sensitive module, described compares mould
Second input of block connects reference voltage, and the output of described comparison module connects the control of described switch module
End processed, described comparison module triggers the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
The output of comparison module described in the input of described feedback module connects, the output of described feedback module
End is connected with the first input end of described comparison module, and described feedback module is for making when described light fixture excess temperature
Described comparison module keeps triggering the output of described switch module for controlling the signal of telecommunication that described light fixture turns off.
The particular circuit configurations of light fixture thermal-shutdown circuit as it has been described above, repeat no more here.
The operation principle of light fixture thermal-shutdown circuit will be further described below.
When lamp temperatures superelevation, the output voltage of temperature sensitive module 110 raises, and the homophase making comparator U1 is defeated
When entering to hold 3 voltages to be increased to bigger than reference voltage, the output 1 of comparator U1 exports high level, due to instead
First diode D1 of feedback module 140 and the existence of output resistance R7, the output 1 of comparator U1 begins
Output high level eventually, switching tube Q1 turns on all the time, switch module 130 output low level all the time, the electricity of light fixture
The manipulated signal of source controller is low level all the time, makes light fixture protection quit work, it is achieved that the temperature of light fixture
Too high protection, the circuit of the most whole light fixture is restarted, and temperature declines back light tool and just can rework.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (6)
1. a light fixture thermal-shutdown circuit, it is characterised in that include for monitoring lamp temperatures and exportable
Temperature sensitive module, comparison module, feedback module and the switch module of the voltage varied with temperature, wherein,
The first input end of described comparison module electrically connects with the output of described temperature sensitive module, described compares mould
Second input of block connects reference voltage, and the output of described comparison module connects the control of described switch module
End processed, described comparison module triggers the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
The output of comparison module described in the input of described feedback module connects, the output of described feedback module
End is connected with the first input end of described comparison module, and described feedback module is for making when described light fixture excess temperature
Described comparison module keeps triggering the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
Described comparison module includes comparator, the in-phase input end of described comparator simultaneously with described temperature sensitive module
Output, the output of described feedback module connect, the inverting input of described comparator connects described ginseng
Examining voltage, the output of described comparator is simultaneously connected with the control end of described switch module, described feedback module
Input, when the output voltage of described temperature sensitive module is bigger than described reference voltage described comparison module output high
Described in level triggers, switch module output is for controlling the signal of telecommunication that described light fixture turns off；
Described feedback module includes the first diode, output resistance R7, wherein, the sun of described first diode
Pole is connected with the output of described comparator, the negative electrode of described first diode by described output resistance R7 with
The in-phase input end of described comparator connects.
Light fixture thermal-shutdown circuit the most according to claim 1, it is characterised in that described comparison module
Also include current-limiting resistance R3, earth resistance R4, divider resistance R5, pull down resistor R6 and current-limiting resistance R8,
Wherein,
The in-phase input end of described comparator is connected by the output of described current-limiting resistance R3 with described temperature sensitive module
Connect；
The inverting input of described comparator connects described reference voltage by described divider resistance R5, and passes through
Described earth resistance R4 ground connection；
The output of described comparator connects the control end of described switch module by described current-limiting resistance R8, and
By described pull down resistor R6 ground connection.
Light fixture thermal-shutdown circuit the most according to claim 1, it is characterised in that described switch module
Including switching tube Q1, photoelectrical coupler, described photoelectrical coupler includes light emitting source and light-receiving device, wherein,
Described switching tube Q1 controls the end output controlling end and described comparison module as described switch module
End connects, and the input of described switching tube Q1 is connected with the output of the light emitting source of described photoelectrical coupler, institute
State the output head grounding of switching tube Q1；
The input of the light emitting source of described photoelectrical coupler connects power supply, the light-receiving device of described photoelectrical coupler
Output head grounding, the input of the light-receiving device of described photoelectrical coupler is defeated as the output of described switch module
Go out for controlling the low level signal of telecommunication that described light fixture turns off.
Light fixture thermal-shutdown circuit the most according to claim 1, it is characterised in that also include dividing potential drop mould
Block, described division module includes divider resistance R1, earth resistance R2 and filter capacitor C1, wherein,
One end of described divider resistance R1 is connected with the output of described temperature sensitive module, described divider resistance R1
The other end be connected with the first input end of described comparison module as the output of division module, described dividing potential drop
The other end of resistance R1 is also by described earth resistance R2 ground connection, described filter capacitor C1 and earth resistance
R2 is in parallel.
5. a light fixture over-temperature protection device, it is characterised in that include light fixture thermal-shutdown circuit, described light fixture mistake
Temperature protection circuit includes for monitoring lamp temperatures and the temperature sensitive module of the exportable voltage varied with temperature, ratio
Relatively module, feedback module and switch module, wherein,
The first input end of described comparison module electrically connects with the output of described temperature sensitive module, described compares mould
Second input of block connects reference voltage, and the output of described comparison module connects the control of described switch module
End processed, described comparison module triggers the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
The output of comparison module described in the input of described feedback module connects, the output of described feedback module
End is connected with the first input end of described comparison module, and described feedback module is for making when described light fixture excess temperature
Described comparison module keeps triggering the output of described switch module for controlling the signal of telecommunication that described light fixture turns off；
Described comparison module includes comparator, the in-phase input end of described comparator simultaneously with described temperature sensitive module
Output, the output of described feedback module connect, the inverting input of described comparator connects described ginseng
Examining voltage, the output of described comparator is simultaneously connected with the control end of described switch module, described feedback module
Input, when the output voltage of described temperature sensitive module is bigger than described reference voltage described comparison module output high
Described in level triggers, switch module output is for controlling the signal of telecommunication that described light fixture turns off；
Described feedback module includes the first diode, output resistance R7, wherein, the sun of described first diode
Pole is connected with the output of described comparator, the negative electrode of described first diode by described output resistance R7 with
The in-phase input end of described comparator connects.
Light fixture over-temperature protection device the most according to claim 5, it is characterised in that described comparison module is also
Including current-limiting resistance R3, earth resistance R4, divider resistance R5, pull down resistor R6 and current-limiting resistance R8,
Wherein,
The in-phase input end of described comparator is connected by the output of described current-limiting resistance R3 with described temperature sensitive module
Connect；
The inverting input of described comparator connects described reference voltage by described divider resistance R5, and passes through
Described earth resistance R4 ground connection；
The output of described comparator connects the control end of described switch module by described current-limiting resistance R8, and
By described pull down resistor R6 ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210093483.5A CN103369770B (en) | 2012-03-31 | 2012-03-31 | Light fixture thermal-shutdown circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210093483.5A CN103369770B (en) | 2012-03-31 | 2012-03-31 | Light fixture thermal-shutdown circuit and device |
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| CN103369770A CN103369770A (en) | 2013-10-23 |
| CN103369770B true CN103369770B (en) | 2016-09-07 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105578652A (en) * | 2016-01-18 | 2016-05-11 | 上海康耐司信号设备有限公司 | Over-temperature protection circuit and system for LED lamp |
| CN108306258B (en) * | 2018-04-04 | 2023-12-29 | 奥然生物科技（上海）有限公司 | Over-temperature detection circuit and over-temperature protection circuit for heater |
| CN109168236B (en) * | 2018-09-17 | 2020-11-10 | 四川鹏天科技发展有限公司 | High-load electrodeless dimming control device and dimming system applying same |
| CN109659905B (en) * | 2019-01-07 | 2025-01-07 | 山东朗进科技股份有限公司 | An IPM overcurrent and overtemperature protection circuit |
| CN110134055B (en) * | 2019-06-21 | 2020-11-10 | 厦门美图之家科技有限公司 | Self-protection heating circuit, beauty instrument, and line fault detection method and device |
| CN111276935A (en) * | 2020-02-28 | 2020-06-12 | 联合汽车电子有限公司 | Overcurrent diagnosis processing circuit |
| CN113612199A (en) * | 2021-07-05 | 2021-11-05 | 广州金升阳科技有限公司 | Time delay protection and self-recovery circuit |
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| US6349023B1 (en) * | 2000-02-24 | 2002-02-19 | Robotic Vision Systems, Inc. | Power control system for illumination array |
| CN1374824A (en) * | 2001-02-20 | 2002-10-16 | 电灯专利信托有限公司 | Protective electric circuit for fluorescent lamp |
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| KR100953429B1 (en) * | 2003-08-11 | 2010-04-20 | 삼성전자주식회사 | Lamp driving method and apparatus, backlight assembly and liquid crystal display device having same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6349023B1 (en) * | 2000-02-24 | 2002-02-19 | Robotic Vision Systems, Inc. | Power control system for illumination array |
| CN1374824A (en) * | 2001-02-20 | 2002-10-16 | 电灯专利信托有限公司 | Protective electric circuit for fluorescent lamp |
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