CN107294053B - Current foldback circuit and exposure bench - Google Patents
Current foldback circuit and exposure bench Download PDFInfo
- Publication number
- CN107294053B CN107294053B CN201710638219.8A CN201710638219A CN107294053B CN 107294053 B CN107294053 B CN 107294053B CN 201710638219 A CN201710638219 A CN 201710638219A CN 107294053 B CN107294053 B CN 107294053B
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- crest
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- electric current
- light source
- wave
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
Abstract
The present invention provides a kind of current foldback circuit and exposure bench.Current foldback circuit includes detecting unit, recording unit, judging unit and control unit, detecting unit detecting flows through the electric current of the light source in exposure bench, the crest value of recording unit records electric current, judging unit judges whether the crest value of (n+2) a wave crest is greater than the crest value of (n+1) a wave crest, and judge whether the crest value of (n+2) a wave crest is greater than or equal to the presupposition multiple of a reference value, control signal is issued when the crest value of (n+2) a wave crest is greater than the crest value of (n+1) a wave crest and the crest value of (n+2) a wave crest is greater than or equal to the presupposition multiple of a reference value to control light source power-off, when the crest value of (n) a wave crest in electric current is greater than the crest value of (n+1) a wave crest in electric current, the crest value of (n) a wave crest, which is taken, in electric current does a reference value , the crest value of (n+1) a wave crest, which is taken, when the crest value of (n) a wave crest in electric current is less than the crest value of (n+1) a wave crest in electric current, in electric current does a reference value, and n is positive integer.
Description
Technical field
The present invention relates to field of liquid crystal display more particularly to a kind of current foldback circuits and exposure bench.
Background technique
With the rapid development of the technologies such as semiconductor technology, LCD technology, since volume is light, consumption in liquid crystal display
The advantages that electricity is few and be well received by consumers.When making liquid crystal display, need using to exposure bench.In exposure bench
Light source (for example, mercury lamp) stable operation of exposure machine is played a crucial role.Currently, light source in exposure bench
Safeguard measure is to break when the electric current for flowing through light source is more than preset value (126 peace) preset time (2 seconds) to the light source
Electricity.However, the existing safeguard measure of light source can not protect light source completely in exposure bench.For example, when the electric current for flowing through light source
Although being less than the preset value, due to light source itself quality problems when (for example, light source itself is there are subtle slight crack, because
Light source heat radiation caused by source mass problem is unsmooth), when there are big ups and downs suddenly in the electric current for flowing through light source, at this point, if
Light source is continued to be powered and is then likely to cause the explosion of light source, so that exposure bench be caused to damage or exposure bench processing
Product damage.
Summary of the invention
The present invention provides a kind of current foldback circuit.A kind of current foldback circuit, the current foldback circuit include detecting
Unit, recording unit, judging unit and control unit, the detecting unit is for detecting the electricity for flowing through the light source in exposure bench
Stream, the recording unit are used to record the crest value for the electric current for flowing through the light source in the exposure bench, and the judging unit is used
In judging whether the crest value of (n+2) a wave crest in the electric current is greater than the crest value of (n+1) a wave crest in the electric current,
And judge whether the crest value of (n+2) a wave crest in the electric current is greater than or equal to the presupposition multiple of a reference value, when the electricity
In stream the crest value of (n+2) a wave crest be greater than the electric current in (n+1) a wave crest crest value and the electric current in (n+
2) control signal is issued when the crest value of a wave crest is greater than or equal to the presupposition multiple of a reference value, the control signal is for controlling
Light source power-off in the exposure bench, wherein when the crest value of (n) a wave crest in the electric current is greater than the in the electric current
(n+1) crest value of (n) a wave crest, which is taken, when the crest value of a wave crest, in the electric current does a reference value, when the electricity
When the crest value of (n) a wave crest is less than the crest value of (n+1) a wave crest in the electric current in stream, (n+ in the electric current
1) crest value of a wave crest, which is taken, does a reference value, and the n is positive integer.
Compared to the prior art, the current foldback circuit of the invention crest value of (n+2) a wave crest in electric current is greater than
The crest value of (n+2) a wave crest is greater than or equal to base in the crest value of (n+1) a wave crest and the electric current in the electric current
Control signal is issued when the presupposition multiple of quasi- value, to control the power-off of the light source in the exposure bench, so as to avoid flowing through
The electric current of the light source when fluctuation by a relatively large margin occurs the light source continue to be powered and caused by explosion accident.And further
Judgement when ground, the current foldback circuit in the present invention electric current occur fluctuation by a relatively large margin is real-time judge, so as to
Whether enough timely determinations power off the light source.
The present invention also provides a kind of exposure bench.The exposure bench includes light source and current foldback circuit, the mistake
Stream protection circuit includes detecting unit, recording unit, judging unit and control unit, and the detecting unit flows through institute for detecting
The electric current of light source is stated, the recording unit is used to record the crest value for the electric current for flowing through the light source, and the judging unit is used for
Judge whether the crest value of (n+2) a wave crest in the electric current is greater than the crest value of (n+1) a wave crest in the electric current, and
Judge whether the crest value of (n+2) a wave crest in the electric current is greater than or equal to the presupposition multiple of a reference value, when the electric current
In (n+2) a wave crest crest value be greater than the electric current in (n+1) a wave crest crest value and the electric current in (n+2)
The crest value of a wave crest issues control signal when being greater than or equal to the presupposition multiple of a reference value, wherein when in the electric current (n)
When the crest value of a wave crest is greater than the crest value of (n+1) a wave crest in the electric current, the wave of (n) a wave crest in the electric current
Peak value, which is taken, does a reference value, when the crest value of (n) a wave crest in the electric current is less than (n+1) a wave in the electric current
The crest value of (n+1) a wave crest, which is taken, when the crest value at peak, in the electric current does a reference value, wherein the n is positive whole
Number, the control signal is for controlling the light source power-off.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the circuit block diagram for the current foldback circuit that a better embodiment of the invention provides.
Fig. 2 is the current waveform schematic diagram for the light source that the present invention flows through in exposure bench.
Fig. 3 is the circuit block diagram for the exposure bench that a better embodiment of the invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the circuit block diagram for the current foldback circuit that a better embodiment of the invention provides.It is described
Current foldback circuit 10 is applied in exposure bench 1, for protecting the light source 30 in the exposure bench 1.The overcurrent protection
Circuit 10 includes detecting unit 100, recording unit 200, judging unit 300 and control unit 400.The detecting unit 100 is used
The electric current of the light source 30 in exposure bench 1 is flowed through in detecting.The recording unit 200 flows through in the exposure bench for recording
Light source electric current crest value (part wave crest is irised out in Fig. 2 with circle).The judging unit 300 is for judging the electricity
Whether the crest value of (n+2) a wave crest is greater than the crest value of (n+1) a wave crest in the electric current in stream, and judges the electricity
Whether the crest value of (n+2) a wave crest is greater than or equal to the presupposition multiple of a reference value in stream.When (n+2) is a in the electric current
The crest value of wave crest is greater than the wave of the crest value of (n+1) a wave crest and (n+2) a wave crest in the electric current in the electric current
Peak value issues control signal when being greater than or equal to the presupposition multiple of a reference value, the control signal is for controlling the exposure bench
Light source 30 in 1 powers off.Wherein, when the crest value of (n) a wave crest in the electric current is greater than (n+1) a wave in the electric current
The crest value of (n) a wave crest, which is taken, when the crest value at peak, in the electric current does a reference value, when in the electric current (n)
When the crest value of a wave crest is less than the crest value of (n+1) a wave crest in the electric current, (n+1) a wave crest in the electric current
Crest value, which is taken, does a reference value, and the n is positive integer.
In the present embodiment, the detecting unit 100 detects the electric current for flowing through the light source 30, and will detect
Flow through the current value output of the light source 30.Signal biography can be carried out between the recording unit 200 and the detecting unit 100
It is defeated, it in the present embodiment, is electrically connected between the recording unit 200 and the detecting unit 100, the recording unit 200
The current value for flowing through the light source 30 that the detecting unit 100 detects is received, and records the electricity flowed through in the light source 30
The crest value of stream.The electric current for flowing through the light source 30 is alternating current, and the alternating current is influenced and real-time change by the external world
, therefore, the waveform of what is detected the flow through electric current of the light source 30 be also similar sine wave signal and the crest value of wave be
(the please referring to Fig. 2) of real-time change.Therefore, the electric current of the light source 30 can be flowed through by the variation judgement of each crest value
The situation of change of peak values in real time.
Preferably, the detecting unit 100 is arranged adjacent to the light source 30, and the detecting unit 100 for detect with
The variation of the electromagnetic field of the connected power supply line of the light source 30, and according to the electromagnetic field for the power supply line being connected with the light source 30
Variation obtains flowing through the variation of the electric current of the light source 30 in exposure bench 1.
The detecting unit 100 includes Hall element, and the Hall element is for detecting the power supply being connected with the light source
The variation in the magnetic field of line, and according to the variation of the electromagnetic field obtain flowing through the variation of the electric current of light source 30 in exposure bench 1.
The detecting unit 100 further includes through-hole, and the through-hole is used for the power supply line by being connected with the light source 30, institute
It states Hall element and is arranged by the through-hole around the power supply line.
Since distance of the power end apart from the light source 30 of the light source 30 described in exposure bench 1 is longer, generally, institute
Stating distance of the power end of light source 30 apart from the light source 30 is 3~5 meters, and the power end of the light source 30 is supplied to the light source
When 30 electric current through the conducting wire between the power end and the light source 30 that connections the light source 30, it may occur that decaying, therefore, institute
The variation for stating power end electric current is different with the variation for the power supply for flowing through the light source 30.The present invention passes through detecting unit 100 is adjacent
The nearly light source 30 is arranged, so as to measure the variation for the electric current for flowing through the light source 30 more accurately.Further, originally
Invention can be Hall sensor, the Hall element by the way that Hall element, the Hall element are arranged in detecting unit 100
In the variation in the magnetic field for the power supply line that detecting is connected with light source, without being contacted with power supply line, do not interfere in exposure bench 1
Each circuit and exposure bench 1 in light source 30 power power end and light source 30, and will not consume give light source 30 supply
The power of the power supply of electricity is sensed particularly suitable for high current.Further, the through-hole passes through power supply line, and Hall element
It can be improved the precision for detecting the variation for the electric current for flowing through the light source around power supply line setting.In one embodiment,
The current foldback circuit 10 further includes converting unit 500.The converting unit 500 is for detecting the detecting unit 100
To the electric current for flowing through the light source 30 in the exposure bench 1 be converted into voltage.Correspondingly, the recording unit 200 is for remembering
Record flows through the crest value of the voltage of the light source 30 in the exposure bench 1.The judging unit 300 is for judging in the voltage
Whether the crest value of (n+2) a wave crest is greater than the crest value of (n+1) a wave crest in the voltage, and judges in the voltage
Whether the crest value of (n+2) a wave crest is greater than or equal to the presupposition multiple of a reference value.When (n+2) a wave crest in the voltage
Crest value be greater than the crest value of the crest value of (n+1) a wave crest and (n+2) a wave crest in the voltage in the voltage
More than or equal to a reference value presupposition multiple when issue control signal, the control signal be used for control in the exposure bench
Light source power-off wherein, when (n) a wave crest in the voltage crest value be greater than the voltage in (n+1) a wave crest wave
The crest value of (n) a wave crest, which is taken, when peak value, in the voltage does a reference value, when (n) a wave crest in the voltage
Crest value when being less than the crest value of (n+1) a wave crest in the voltage, the crest value of (n+1) a wave crest in the voltage
It is taken and does a reference value, and the n is positive integer.
Preferably, the current foldback circuit 10 further includes alarm unit 600.The alarm unit 600 is used for described
When control signal controls the power-off of the light source 30 in the exposure bench 1, send a warning, to prompt user to flow through the exposure
There are big ups and downs in the electric current of light source 30 in board 1.So that user provides treatment Countermeasures in time.
Compared to the prior art, the current foldback circuit 10 of the invention crest value of (n+2) a wave crest in electric current is big
The crest value of (n+2) a wave crest is greater than or equal in the crest value of (n+1) a wave crest and the electric current in the electric current
When the presupposition multiple of a reference value issue control signal, with control the light source 30 in the exposure bench 1 power-off, so as to avoid
Flow through the light source 30 when fluctuation by a relatively large margin occurs for the electric current of the light source 30 continue to be powered and caused by explosion accident.And
Further, the judgement when current foldback circuit 10 in the present invention electric current occurs fluctuation by a relatively large margin is real-time judge
, whether the light source 30 is powered off so as to timely determination.
Further, the electric current that the judging unit 300 is also used to judge to flow through the light source 30 in the exposure bench 1
Whether crest value is greater than or equal to pre-set peak value, when the crest value for the electric current for flowing through the light source 30 in the exposure bench 1 is greater than
Or when being equal to the pre-set peak value, described control unit 400 issues control signal, and the control signal is for controlling the exposure
Light source 30 in board 1 powers off.Preferably, the pre-set peak value is greater than or equal to the presupposition multiple of a reference value.Thus may be used
See, current foldback circuit 10 of the invention can also be in the crest value for flowing through the electric current of the light source 30 in the exposure bench 1
It is not no when being greater than or equal to pre-set peak value, it controls light source 30 in the exposure bench 1 and powers off.And flowing through the exposure bench 1
In the crest value of electric current of light source 30 when whether being less than pre-set peak value, if flowing through the electric current of the light source 30 of the exposure bench 1
Generation acute variation when, control light source 30 in the exposure bench 1 and power off, to play in the exposure bench 1
Light source 30 duplicate protection.
Referring to Fig. 3, Fig. 3 is the circuit block diagram for the exposure bench that a better embodiment of the invention provides.The exposure
Board 1 includes light source 30 and current foldback circuit 10.The current foldback circuit 10 please refers to the description of front, no longer superfluous herein
It states.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Claims (10)
1. a kind of current foldback circuit, which is characterized in that the current foldback circuit includes detecting unit, recording unit, judgement
Unit and control unit, the detecting unit are used for detecting the electric current for flowing through the light source in exposure bench, the recording unit
The crest value of the electric current of light source in the exposure bench is flowed through in record, and the judging unit is for judging in the electric current the
Whether the crest value of n+2 wave crest is greater than the crest value of (n+1)th wave crest in the electric current, and judges n-th+2 in the electric current
Whether the crest value of a wave crest is greater than or equal to the presupposition multiple of a reference value, when the crest value of the n-th+2 wave crests in the electric current
Greater than the crest value of (n+1)th wave crest in the electric current and the crest value of the n-th+2 wave crests in the electric current is greater than or equal to base
Control signal is issued when the presupposition multiple of quasi- value, the control signal is used to control the light source power-off in the exposure bench,
In, when the crest value of n-th of wave crest in the electric current is greater than the crest value of (n+1)th wave crest in the electric current, the electric current
In the crest value of n-th of wave crest taken and do a reference value, when the crest value of n-th of wave crest in the electric current is less than the electric current
In (n+1)th wave crest crest value when, the crest value of (n+1)th wave crest, which is taken, in the electric current does a reference value, and the n
For positive integer.
2. current foldback circuit as described in claim 1, which is characterized in that the detecting unit is arranged adjacent to the light source,
And the detecting unit be used for detect the power supply line being connected with the light source electromagnetic field variation, and according to the light source phase
The variation of the electromagnetic field of power supply line even obtains flowing through the variation of the electric current of the light source in exposure bench.
3. current foldback circuit as claimed in claim 2, which is characterized in that the detecting unit includes Hall element, described
Hall element is surrounded on the connected power supply line setting of the light source, for detecting the electromagnetic field for the power supply line being connected with the light source
Variation, and according to the variation of the electromagnetic field obtain flowing through the variation of the electric current of the light source in exposure bench.
4. current foldback circuit as described in claim 1, which is characterized in that the judging unit is also used to judge to flow through described
Whether the crest value of the electric current of the light source in exposure bench is greater than or equal to pre-set peak value, when flowing through the light in the exposure bench
When the crest value of the electric current in source is greater than or equal to the pre-set peak value, described control unit issues control signal, the control letter
Number for controlling the power-off of the light source in the exposure bench, the pre-set peak value is greater than or equal to default times of a reference value
Number.
5. current foldback circuit as described in claim 1, which is characterized in that the current foldback circuit further includes that conversion is single
Member, the electric current for flowing through the light source in the exposure bench that the converting unit is used to detect the detecting unit are converted into
Voltage；Correspondingly, the recording unit is used to record the crest value for the voltage for flowing through the light source in the exposure bench, described to sentence
Disconnected unit is for judging whether the crest value of the n-th+2 wave crests in the voltage is greater than the wave of (n+1)th wave crest in the voltage
Peak value, and judge whether the crest value of the n-th+2 wave crests in the voltage is greater than or equal to the presupposition multiple of a reference value, when described
In voltage the crest value of the n-th+2 wave crests be greater than the voltage in (n+1)th wave crest crest value and the voltage in the n-th+2
The crest value of wave crest issues control signal when being greater than or equal to the presupposition multiple of a reference value, the control signal is described for controlling
Light source power-off in exposure bench, wherein when the crest value of n-th of wave crest in the voltage is greater than in the voltage (n+1)th
The crest value of n-th of wave crest, which is taken, when the crest value of wave crest, in the voltage does a reference value, when n-th in the voltage
When the crest value of wave crest is less than the crest value of (n+1)th wave crest in the voltage, the crest value of (n+1)th wave crest in the voltage
It is taken and does a reference value, and the n is positive integer.
6. a kind of exposure bench, which is characterized in that the exposure bench includes light source and current foldback circuit, the overcurrent protection
Circuit includes detecting unit, recording unit, judging unit and control unit, and the detecting unit flows through the light source for detecting
Electric current, the recording unit is used to record the crest value of the electric current for flowing through the light source, and the judging unit is used to judge institute
Whether the crest value for stating the n-th+2 wave crests in electric current is greater than the crest value of (n+1)th wave crest in the electric current, and judges the electricity
Whether the crest value of the n-th+2 wave crests is greater than or equal to the presupposition multiple of a reference value in stream, when the n-th+2 wave crests in the electric current
Crest value be greater than the crest value of (n+1)th wave crest in the electric current and the crest value of the n-th+2 wave crests in the electric current is greater than
Or equal to a reference value presupposition multiple when issue control signal, wherein when n-th of wave crest in the electric current crest value be greater than institute
The crest value of n-th of wave crest, which is taken, when stating the crest value of (n+1)th wave crest in electric current, in the electric current does a reference value, when
When the crest value of n-th of wave crest is less than the crest value of (n+1)th wave crest in the electric current in the electric current, n-th in the electric current+
The crest value of 1 wave crest, which is taken, does a reference value, wherein the n is positive integer, and the control signal is for controlling the light
Source power-off.
7. exposure bench as claimed in claim 6, which is characterized in that the detecting unit is arranged adjacent to the light source, and institute
State the variation of electromagnetic field of the detecting unit for detecting the power supply line being connected with the light source, and according to being connected with the light source
The variation of the electromagnetic field of power supply line obtains flowing through the variation of the electric current of the light source.
8. exposure bench as claimed in claim 7, which is characterized in that the detecting unit includes Hall element, the Hall
Element is surrounded on the connected power supply line setting of the light source, the change of the electromagnetic field for detecting the power supply line being connected with the light source
Change, and according to the variation of the electromagnetic field obtains flowing through the variation of the electric current of the light source in exposure bench.
9. exposure bench as claimed in claim 6, which is characterized in that the judging unit is also used to judge to flow through the exposure
Whether the crest value of the electric current of the light source in board is greater than or equal to pre-set peak value, when flowing through the light source in the exposure bench
When the crest value of electric current is greater than or equal to the pre-set peak value, described control unit issues control signal, and the control signal is used
In controlling the light source power-off in the exposure bench, the pre-set peak value is greater than or equal to the presupposition multiple of a reference value.
10. exposure bench as claimed in claim 6, which is characterized in that the current foldback circuit further includes converting unit, institute
It states the electric current that flows through the light source of the converting unit for detecting the detecting unit and is converted into voltage；Correspondingly, described
Recording unit is used to record the crest value of the voltage for flowing through the light source, and the judging unit is used to judge n-th in the voltage+
Whether the crest value of 2 wave crests is greater than the crest value of (n+1)th wave crest in the voltage, and judges in the voltage the n-th+2
Whether the crest value of wave crest is greater than or equal to the presupposition multiple of a reference value, when the crest value of the n-th+2 wave crests in the voltage is big
The crest value of the n-th+2 wave crests is greater than or equal to benchmark in the crest value of (n+1)th wave crest and the voltage in the voltage
Control signal is issued when the presupposition multiple of value, the control signal is for controlling the light source power-off, wherein when in the voltage
When the crest value of n-th of wave crest is greater than the crest value of (n+1)th wave crest in the voltage, the wave of n-th of wave crest in the voltage
Peak value, which is taken, does a reference value, when the crest value of n-th of wave crest in the voltage is less than (n+1)th wave crest in the voltage
The crest value of (n+1)th wave crest, which is taken, when crest value, in the voltage does a reference value, and the n is positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710638219.8A CN107294053B (en) | 2017-07-31 | 2017-07-31 | Current foldback circuit and exposure bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710638219.8A CN107294053B (en) | 2017-07-31 | 2017-07-31 | Current foldback circuit and exposure bench |
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| Publication Number | Publication Date |
|---|---|
| CN107294053A CN107294053A (en) | 2017-10-24 |
| CN107294053B true CN107294053B (en) | 2019-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710638219.8A Active CN107294053B (en) | 2017-07-31 | 2017-07-31 | Current foldback circuit and exposure bench |
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| Country | Link |
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| CN (1) | CN107294053B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449877B (en) * | 2018-12-03 | 2020-05-12 | 惠科股份有限公司 | Overcurrent protection method and display device |
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|---|---|---|---|---|
| CN86107915A (en) * | 1985-11-19 | 1987-07-29 | 通用电气公司 | Adopt the overcurrent circuit interruption device of RMS sampling |
| WO2010134179A1 (en) * | 2009-05-21 | 2010-11-25 | トヨタ自動車株式会社 | Converter overcurrent prevention/control device and converter overcurrent prevention method |
| CN102957312A (en) * | 2011-08-19 | 2013-03-06 | 立锜科技股份有限公司 | Power supply with over-current protection and control circuit and protection method thereof |
| CN103199506A (en) * | 2013-04-12 | 2013-07-10 | 深圳市华星光电技术有限公司 | Over-current protection circuit and backlight module of light source drive module |
| CN104424039A (en) * | 2013-09-06 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Protecting circuit |
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2017
- 2017-07-31 CN CN201710638219.8A patent/CN107294053B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107915A (en) * | 1985-11-19 | 1987-07-29 | 通用电气公司 | Adopt the overcurrent circuit interruption device of RMS sampling |
| WO2010134179A1 (en) * | 2009-05-21 | 2010-11-25 | トヨタ自動車株式会社 | Converter overcurrent prevention/control device and converter overcurrent prevention method |
| CN102957312A (en) * | 2011-08-19 | 2013-03-06 | 立锜科技股份有限公司 | Power supply with over-current protection and control circuit and protection method thereof |
| CN103199506A (en) * | 2013-04-12 | 2013-07-10 | 深圳市华星光电技术有限公司 | Over-current protection circuit and backlight module of light source drive module |
| CN104424039A (en) * | 2013-09-06 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Protecting circuit |
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| Publication number | Publication date |
|---|---|
| CN107294053A (en) | 2017-10-24 |
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