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公开(公告)号：AU2011201627A1
公开(公告)日：2012-07-26
申请号：AU2011201627
申请日：2011-04-11
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI , CHIEN WEN-HSIANG
IPC: H02H3/02
Abstract: A limiting current circuit that has output short circuit protection is connected to an external voltage source and comprises an output terminal, an input current unit, a driving transistor, a voltage control resistor, a voltage 5 control transistor and a delay unit. The output terminal is connected to a load and has an output current. The driving transistor has an internal resistance, a drain current and a gate voltage. The voltage control resistor has a resistor voltage. The voltage control transistor has an internal resistance and a parasitic capacitance. The delay unit makes the resistor voltage charging the parasitic 10 capacitance to extend the period of lower internal resistance of the voltage control transistor and the period of higher internal resistance of the driving transistor, makes the internal resistance of the voltage control transistor is less than the internal resistance of the driving transistor when the load is shorted. C* 'II CIo
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公开(公告)号：AU2011226896B2
公开(公告)日：2015-08-27
申请号：AU2011226896
申请日：2011-09-27
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI
Abstract: A driving circuit for light emitting elements comprises a rectifying unit, a first constant current unit, a first driving transistor, a first voltage control unit and at least one first light emitting element. The rectifying unit has a 5 first terminal and a second terminal, is connected to an external power source that provides alternating current power that is sinusoidal and has alternating negative and positive segments, inverts the negative segmEnts of the AC power to positive segments and forms a pulsating direct current voltage. The first constant current unit has a first end and a second end. 10 The first driving transistor comprises a first gate, a first drain and a first source. The first voltage control unit comprises a first variable resistor and a first bias control element. The first light emitting element has a first end and a second end. o z en cz w
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公开(公告)号：AU2010201909B2
公开(公告)日：2012-12-20
申请号：AU2010201909
申请日：2010-05-12
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI , CHIEN WEN-HSIANG
Abstract: The LED driver of the present invention comprises multiple LED arrays, at least one dividing diode, a power module, a driving module, at least one switch pair and a voltage sensing module. Each LED array comprises 5 multiple LEDs connected in series. The dividing diode is mounted between adjacent LED arrays. The power module is connected to an external power source and forms a pulsating direct current (DC) voltage. The driving module receives the pulsating DC voltage outputs a constant current to the LED arrays. The voltage sensing module closes and opens the switch pairs 10 that changes electrical configuration of the LED arrays. The LED driving method of the present invention comprises setting multiple voltage drops and at least one reference voltage; sensing an incoming voltage to compare with the reference voltage; and changing ways of connections of LED arrays based on the reference voltage and the incoming voltage. (Nn ~7f) (NN C (N (N
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Patent Agency Ranking
公开(公告)号：AU2010201909A1
公开(公告)日：2011-02-17
申请号：AU2010201909
申请日：2010-05-12
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI , CHIEN WEN-HSIANG
Abstract: The LED driver of the present invention comprises multiple LED arrays, at least one dividing diode, a power module, a driving module, at least one switch pair and a voltage sensing module. Each LED array comprises multiple LEDs connected in series. The dividing diode is mounted between adjacent LED arrays. The power module is connected to an external power source and forms a pulsating direct current (DC) voltage. The driving module receives the pulsating DC voltage outputs a constant current to the LED arrays. The voltage sensing module closes and opens the switch pairs that changes electrical configuration of the LED arrays. The LED driving method of the present invention comprises setting multiple voltage drops and at least one reference voltage; sensing an incoming voltage to compare with the reference voltage; and changing ways of connections of LED arrays based on the reference voltage and the incoming voltage.
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公开(公告)号：AU2010230081B2
公开(公告)日：2013-05-02
申请号：AU2010230081
申请日：2010-10-13
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI , YU CHUNG-HUNG
Abstract: 1 The invention provides a light emitting device driving circuit, comprising a 2 rectification unit, a current limiting unit and a load. The load comprises a first light 3 emitting device, a reverse voltage providing unit and a second light emitting device 4 connected in serial. When the rectification unit rectifies an alternate current voltage to 5 output a direct current voltage, and the current limiting unit limits the direct current in 6 a predetermined value, the direct current is provided to the first light emitting device 7 or the second light emitting device for operation. The reverse voltage providing unit 8 provides a reverse voltage to reduce the total operating voltage of the light emitting 9 devices in order to enhance the driving efficiency and the power factor. current limiting unit first light emitting device / AC rect if ication unit reverse voltage providing unit / second light emitting device' Fig. I
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公开(公告)号：AU2011226896A1
公开(公告)日：2012-04-12
申请号：AU2011226896
申请日：2011-09-27
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI
Abstract: A driving circuit for light emitting elements comprises a rectifying unit, a first constant current unit, a first driving transistor, a first voltage control unit and at least one first light emitting element. The rectifying unit has a 5 first terminal and a second terminal, is connected to an external power source that provides alternating current power that is sinusoidal and has alternating negative and positive segments, inverts the negative segmEnts of the AC power to positive segments and forms a pulsating direct current voltage. The first constant current unit has a first end and a second end. 10 The first driving transistor comprises a first gate, a first drain and a first source. The first voltage control unit comprises a first variable resistor and a first bias control element. The first light emitting element has a first end and a second end. o z en cz w
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公开(公告)号：AU2010230081A1
公开(公告)日：2012-02-16
申请号：AU2010230081
申请日：2010-10-13
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI , YU CHUNG-HUNG
Abstract: 1 The invention provides a light emitting device driving circuit, comprising a 2 rectification unit, a current limiting unit and a load. The load comprises a first light 3 emitting device, a reverse voltage providing unit and a second light emitting device 4 connected in serial. When the rectification unit rectifies an alternate current voltage to 5 output a direct current voltage, and the current limiting unit limits the direct current in 6 a predetermined value, the direct current is provided to the first light emitting device 7 or the second light emitting device for operation. The reverse voltage providing unit 8 provides a reverse voltage to reduce the total operating voltage of the light emitting 9 devices in order to enhance the driving efficiency and the power factor. current limiting unit first light emitting device / AC rect if ication unit reverse voltage providing unit / second light emitting device' Fig. I
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公开(公告)号：AU2010201908A1
公开(公告)日：2011-02-24
申请号：AU2010201908
申请日：2010-05-12
Applicant: ADVANCED CONNECTEK INC
Inventor： CHENG CHING-CHI , CHIEN WEN-HSIANG
Abstract: A constant current device in accordance with the present invention is connected to an external voltage source and comprises an input unit, a driving transistor and a voltage control unit. The input unit is connected to the external voltage source. The driving transistor is used to output constant current. The voltage control unit makes the driving output constant current and comprises at least one resistor and a semiconductor load, and has a resistor voltage, the resistor comprising an input and an output.
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