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WO2008146974A1 - Ballast hybride de pilotage d'une lampe triode à nanotubes de carbone - Google Patents

Ballast hybride de pilotage d'une lampe triode à nanotubes de carbone Download PDF

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Publication number
WO2008146974A1
WO2008146974A1 PCT/KR2007/003142 KR2007003142W WO2008146974A1 WO 2008146974 A1 WO2008146974 A1 WO 2008146974A1 KR 2007003142 W KR2007003142 W KR 2007003142W WO 2008146974 A1 WO2008146974 A1 WO 2008146974A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
driving
bipolar pulse
triode
output
Prior art date
Application number
PCT/KR2007/003142
Other languages
English (en)
Inventor
Seok-Jin Ha
Hye-Man Jung
Dong-Eui Lee
Pan-Keun Back
Jong-Hyun Kim
Dong-Wook Yoo
Myung-Hyo Ryu
Original Assignee
Airtec System Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020070062718A external-priority patent/KR100862270B1/ko
Application filed by Airtec System Co., Ltd. filed Critical Airtec System Co., Ltd.
Publication of WO2008146974A1 publication Critical patent/WO2008146974A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J63/00—Cathode-ray or electron-stream lamps
    • H01J63/02—Details, e.g. electrode, gas filling, shape of vessel

Definitions

  • the present invention relates to a hybrid ballast for driving a triode carbon nanotube
  • CNT lamp and more particularly to a hybrid ballast for driving a triode CNT lamp, which is capable of applying a high DC voltage to an anode terminal and applying a bipolar pulse to a gate terminal in a state in which a cathode terminal is grounded.
  • Fluorescent lamps which are currently being used have been widely used as light sources in a home and an industrial field, together with incandescent lamps.
  • the development of a product which emits light similar to solar light with high energy efficiency is further required.
  • the development of an environment-friendly light source which discharges a small amount of mercury is further required.
  • LED light-emitting diode
  • PDP plasma display panel
  • EL electroluminescence
  • a field emission display (FED) using field emission which is reported as a representative next-generation light-emitting device recently, can theoretically implement a fluorescent display device having a high response speed and low power consumption and is being expected as an environment-friendly device which has high energy efficiency and does not use harmful gas such as mercury.
  • a carbon nanotube As an electron emission source of a field emission light-emitting device, a carbon nanotube (CNT) is most excellent.
  • a field emission lamp using a CNT includes a diode field emission lamp and a triode field emission lamp. In view of life span, the triode field emission lamp is advantageous.
  • the triode field emission device is obtained by coating a fluorescent material on an anode using transparent electrode glass, vertically arranging a CNT on a cathode and a gate electrode using a suitable method, and maintaining two substrates at a predetermined gap, and performing vacuum packaging.
  • a high DC voltage of about 10 kV should be applied.
  • a device having a high internal voltage e.g., a capacitor, a diode, or a transformer
  • the device having the high internal voltage is not widely used in an industrial field and is difficult to be used in an economical or technical viewpoint. Disclosure of Invention Technical Problem
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a hybrid ballast for driving a triode CNT lamp, which is capable of applying a high DC voltage to an anode terminal and applying a bipolar pulse to a gate terminal in a state in which a cathode terminal is grounded.
  • a hybrid ballast for driving a triode carbon nanotube (CNT) lamp including: a high DC power supply source which supplies a high DC voltage to an anode terminal of the triode in a state in which a cathode terminal is grounded; and a bipolar pulse power supply source which supplies a bipolar pulse voltage to a gate terminal of the triode in a state in which the cathode terminal is grounded.
  • the high DC power supply source may include a filter which eliminates noise included in an input AC voltage; a rectifier which converts the AC voltage input through the filter into a DC voltage and outputs the DC voltage; an active power factor compensator which compensates for a power factor of the DC voltage output from the rectifier, amplifies the DC voltage, and outputs the amplified DC voltage; an inverter which converts the DC voltage output from the active power factor compensator into a rectangular wave AC voltage having a high frequency; a resonance circuit which boosts the rectangular wave AC voltage output from the inverter to a high sinusoidal wave AC voltage; and a double voltage circuit which rectifies the AC voltage having the high frequency, which is output from the resonance circuit, and outputs a high DC voltage.
  • the hybrid ballast for driving the triode CNT lamp may further include an output voltage controller which controls a driving frequency of the inverter in order to maintain the high DC voltage output from the double voltage circuit at a constant value.
  • the bipolar pulse power supply source may include a bipolar pulse driving voltage generator which generates a driving voltage of a bipolar pulse using an AC voltage across an inductor included in the active power factor compensator; and a bipolar pulse generator which outputs the bipolar pulse using the DC voltage output from the bipolar pulse driving voltage generator.
  • FIG. 1 is a block diagram showing a hybrid ballast for driving a triode CNT lamp according to an embodiment of the present invention.
  • FIG. 2 is a circuit diagram showing in detail the hybrid ballast for driving the triode
  • FIG. 1 is a block diagram showing a hybrid ballast for driving a triode CNT lamp according to an embodiment of the present invention
  • FIG. 2 is a circuit diagram showing in detail the hybrid ballast for driving the triode CNT lamp according to the embodiment of the present invention.
  • the hybrid ballast for driving the triode CNT lamp includes a high DC power supply source 10 which supplies a high DC voltage to an anode terminal of the triode of the triode CNT lamp 30 in a state in which a cathode terminal is grounded and a bipolar pulse power supply source 20 which supplies a bipolar pulse voltage to a gate terminal of the triode of the triode CNT lamp 30 in a state in which the cathode terminal is grounded. That is, the present invention is characterized in that the high DC voltage supplied to the anode terminal and the bipolar pulse supplied to the gate terminal are simultaneously generated in one ballast.
  • the high DC power supply source 10 for generating the high DC voltage supplied to the anode terminal includes a filter 12 for eliminating noise included in an input AC voltage generated by an AC power supply source 11 , a rectifier 13 for converting an AC voltage from which noise is eliminated by the filter 12 into a DC voltage and outputting the DC voltage, an active power factor compensator 14 for compensating for a power factor of the DC voltage, an inverter 15 for converting the DC voltage having the compensated power factor into a rectangular wave voltage, a resonance circuit 16 for boosting the rectangular wave voltage to a sinusoidal wave AC voltage, and a double voltage circuit 17 for rectifying the AC voltage and outputting a high DC voltage.
  • the high DC power supply source 10 having the above-described configuration generates and applies the high DC voltage to the anode terminal of the field emission lamp using the CNT.
  • the filter 12 eliminates a surge component from the AC power supply source 11 or filters noise included in an AC component and outputs the AC voltage.
  • the filter 12 is used to prevent the device from being damaged due to the surge component and to prevent an undesired voltage from being generated due to noise.
  • the filter 12 may be a surge ballast, a Electromagnetic Interference (EMI) filter or an electromagnetic compatibility (EMC) filter.
  • EMI Electromagnetic Interference
  • EMC electromagnetic compatibility
  • the AC voltage from which noise is eliminated by the filter 12 is input to the rectifier 13.
  • the rectifier 13 converts the AC voltage into the DC voltage.
  • the rectifier 13 is a bridge type rectifying circuit obtained by connecting four diodes in a bridge shape, as shown in FIG. 2.
  • the shape of a current waveform is distorted and thus a phase difference between voltage and current is generated. Accordingly, reactive power needs to be reduced by equalizing the phase and the shape of the current waveform and the phase and the shape of the voltage waveform.
  • the DC voltage output from the rectifier 13 includes a large amount of reactive power, a power factor is low and efficiency deteriorates.
  • the DC voltage output from the rectifier 13 is input to the active power factor compensator 14 such that the power factor is improved.
  • the active power factor compensator 14 which receives the DC voltage output from the rectifier 13 minimizes the reactive power to improve the power factor, amplifies the DC voltage, and outputs the amplified voltage.
  • the active power factor compensator 14 may be implemented by a variety of circuits for compensating for the power factor.
  • a field effect transistor (FET) As shown in FIG. 2, a field effect transistor (FET), a diode and an inductor configure the active power factor compensator 14.
  • FET field effect transistor
  • PFC power factor compensator
  • the active power factor compensator 14 uses an active control integrated circuit (IC) and a boost converter circuit and can control a high power factor and a constant voltage.
  • IC active control integrated circuit
  • the input current waveform is controlled to follow the input voltage waveform under a feedforward control such that the input current waveform is converted into a sinusoidal waveform to improve the power factor and to cope with the restriction of harmonics.
  • the DC voltage of which the power factor is compensated by the active power factor compensator 14 is input to the inverter 15.
  • the inverter 15 converts the DC voltage having the compensated power factor into a rectangular wave AC voltage having a high frequency and outputs the rectangular wave AC voltage.
  • the inverter 15 is a half- bridge inverter as shown in FIG. 2. Two FETs configuring the inverter 15 are frequency-controlled and driven by a pulse width modulation (PWM) control circuit.
  • PWM pulse width modulation
  • the rectangular wave AC voltage output from the inverter 15 is input to the resonance circuit 16.
  • the resonance circuit 16 boosts the rectangular wave AC voltage to the high sinusoidal wave AC voltage and outputs the high sinusoidal wave AC voltage.
  • the resonance circuit 16 LC-resonates to convert the rectangular wave AC voltage having the high frequency, which is output from the inverter 15, into the sinusoidal wave AC voltage.
  • the AC voltage having the high frequency, which is output from the resonance circuit 16, is input to the double voltage circuit 17.
  • the double voltage circuit 17 rectifies the AC voltage having the high frequency and outputs the high DC voltage. That is, the double voltage circuit 17 rectifies the high sinusoidal wave voltage output from the resonance circuit 16 and boosts the voltage in proportion to a double voltage value.
  • the high DC voltage output from the double voltage circuit 17 is applied to the anode terminal of the triode CNT lamp.
  • the high DC voltage output from the double voltage circuit 17 should be applied to the anode terminal of the triode CNT lamp while being maintained at a constant value. Accordingly, in order to control the high voltage output from the double voltage circuit
  • an output voltage controller 18 is further included.
  • the output voltage controller 18 controls a driving frequency of the inverter 15.
  • the output voltage controller 18 controls the PWM control circuit in order to increase the driving frequency of the inverter 15 if the high DC voltage output from the double voltage circuit 17 is higher than a normal output value and controls the PWM control circuit in order to decrease the driving frequency of the inverter 15 if the high DC voltage output from the double voltage circuit 17 is lower than the normal output value.
  • a resonance type half-bridge converter has a characteristic in which a resonance gain is decreased if a switching frequency is increased and is increased if the switching frequency is decreased in a specific frequency range. Accordingly, when the output voltage is increased, the switching frequency of the PWM control circuit of the inverter is increased and, when the output voltage is decreased, the switching frequency of the PWM control circuit of the inverter is decreased. Thus, the output voltage is constantly maintained.
  • a bipolar pulse applied to the gate terminal of the triode CNT lamp is not generated by applying a separate driving voltage and is generated using the AC voltage across the inductor included in the active power factor compensator 14 of the high DC power supply source 10.
  • the bipolar pulse power supply source 2 uses the
  • a bipolar pulse driving voltage generator 21 generates a DC driving voltage of a bipolar pulse using the AC voltage across the inductor of the active power factor compensator 14.
  • the bipolar pulse driving voltage generator 21 rectifies the voltage across the inductor of the active power factor compensator 14 and generates the driving voltage without ripple using only a transistor, a zener diode and a resistor.
  • the driving voltage generated by the bipolar pulse driving voltage generator 21 is applied to a bipolar pulse generator 22.
  • the bipolar pulse generator 22 receives the driving voltage and generates a bipolar pulse.
  • the bipolar pulse generator 22 generates the bipolar pulse having a high frequency and a pulse width of several microseconds or less using the driving voltage output from the bipolar pulse driving voltage generator 21. This bipolar pulse is applied to the gate terminal of the triode CNT lamp such that the lamp can be smoothly turned on.
  • a hybrid ballast for driving a triode CNT lamp of the present invention since, in one ballast, a high DC voltage applied to an anode terminal can be generated and a bipolar pulse applied to a gate terminal can be generated in a state in which a cathode terminal is grounded, it is possible to smoothly drive a field emission lamp using a CNT.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention porte sur un ballast hybride de pilotage d'une lampe triode à nanotubes de carbone (CNT), pouvant appliquer une haute tension CC à une borne d'anode et appliquer des impulsions bipolaires à une borne de porte alors que la borne de cathode est à la terre. Ladite lampe comporte une alimentation CC à haute tension alimentant la borne d'anode de la triode alors que la borne de cathode est à la terre, et une d'alimentation en impulsions bipolaires alimentant la borne de porte de la triode alors que la borne de cathode est à la terre.
PCT/KR2007/003142 2007-05-30 2007-06-28 Ballast hybride de pilotage d'une lampe triode à nanotubes de carbone WO2008146974A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2007-0052643 2007-05-30
KR20070052643 2007-05-30
KR1020070062718A KR100862270B1 (ko) 2007-05-30 2007-06-26 3극 ｃｎｔ 램프 구동용 하이브리드 안정기
KR10-2007-0062718 2007-06-26

Publications (1)

Publication Number Publication Date
WO2008146974A1 true WO2008146974A1 (fr) 2008-12-04

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ID=40075190

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/003142 WO2008146974A1 (fr) 2007-05-30 2007-06-28 Ballast hybride de pilotage d'une lampe triode à nanotubes de carbone

Country Status (1)

Country Link
WO (1) WO2008146974A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2337432A1 (fr) 2009-12-21 2011-06-22 LightLab Sweden AB Circuit de résonance pour agencement d'éclairage à émission de champ
CN103138580A (zh) * 2011-12-01 2013-06-05 台达电子企业管理（上海）有限公司 直流-直流转换器、电力变换器及其控制方法
US8923018B2 (en) 2011-03-28 2014-12-30 Delta Electronics (Shanghai) Co., Ltd. DC/DC converter, power converter and control method thereof
US20160050731A1 (en) * 2013-03-21 2016-02-18 Seoul Semiconductor Co., Ltd. Led driving circuit using double bridge diode and led illumination device comprising same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001236879A (ja) * 2000-01-07 2001-08-31 Samsung Sdi Co Ltd カーボンナノチューブを用いた３極電界放出素子の製造方法
KR20020057636A (ko) * 2001-01-03 2002-07-12 엘지전자 주식회사 탄소나노튜브를 이용한 전계방출형 표시소자 및 그 제조방법
US20040157449A1 (en) * 2001-11-07 2004-08-12 Kishio Hidaka Method for fabricating electrode device
KR20060103995A (ko) * 2005-03-29 2006-10-09 일진다이아몬드(주) 전계 방출기 및 이의 구동 방법
KR20070010238A (ko) * 2005-07-18 2007-01-24 일진다이아몬드(주) 전계 방출 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001236879A (ja) * 2000-01-07 2001-08-31 Samsung Sdi Co Ltd カーボンナノチューブを用いた３極電界放出素子の製造方法
KR20020057636A (ko) * 2001-01-03 2002-07-12 엘지전자 주식회사 탄소나노튜브를 이용한 전계방출형 표시소자 및 그 제조방법
US20040157449A1 (en) * 2001-11-07 2004-08-12 Kishio Hidaka Method for fabricating electrode device
KR20060103995A (ko) * 2005-03-29 2006-10-09 일진다이아몬드(주) 전계 방출기 및 이의 구동 방법
KR20070010238A (ko) * 2005-07-18 2007-01-24 일진다이아몬드(주) 전계 방출 장치

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2337432A1 (fr) 2009-12-21 2011-06-22 LightLab Sweden AB Circuit de résonance pour agencement d'éclairage à émission de champ
WO2011076522A1 (fr) * 2009-12-21 2011-06-30 Lightlab Sweden Ab Circuit de résonance pour dispositif d'éclairage à émission de champ
US20130009563A1 (en) * 2009-12-21 2013-01-10 Lightlab Sweden Ab Resonance circuitry for a field emission lighting arrangement
CN102884866A (zh) * 2009-12-21 2013-01-16 光实验室瑞典股份公司 用于场致发光装置的谐振电路
CN102884866B (zh) * 2009-12-21 2014-05-07 光实验室瑞典股份公司 用于场致发光装置的谐振电路
TWI586218B (zh) * 2009-12-21 2017-06-01 光學實驗室公司 用於場發射照明配置之共振電路
US8923018B2 (en) 2011-03-28 2014-12-30 Delta Electronics (Shanghai) Co., Ltd. DC/DC converter, power converter and control method thereof
CN103138580A (zh) * 2011-12-01 2013-06-05 台达电子企业管理（上海）有限公司 直流-直流转换器、电力变换器及其控制方法
US20160050731A1 (en) * 2013-03-21 2016-02-18 Seoul Semiconductor Co., Ltd. Led driving circuit using double bridge diode and led illumination device comprising same
US9848470B2 (en) * 2013-03-21 2017-12-19 Seoul Semiconductor Co., Ltd. LED driving circuit using double bridge diode and LED illumination device comprising same

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