WO2008128453A1 - Dispositif d'alimentation et procédé de réglage de lumière - Google Patents

Dispositif d'alimentation et procédé de réglage de lumière Download PDF

Info

Publication number
WO2008128453A1
WO2008128453A1 PCT/CN2008/070533 CN2008070533W WO2008128453A1 WO 2008128453 A1 WO2008128453 A1 WO 2008128453A1 CN 2008070533 W CN2008070533 W CN 2008070533W WO 2008128453 A1 WO2008128453 A1 WO 2008128453A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
conversion circuit
half cycle
transformer
circuit
Prior art date
Application number
PCT/CN2008/070533
Other languages
English (en)
Chinese (zh)
Inventor
Dongping Yang
Original Assignee
Proview Technology (Shenzhen) 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
Application filed by Proview Technology (Shenzhen) Co., Ltd. filed Critical Proview Technology (Shenzhen) Co., Ltd.
Publication of WO2008128453A1 publication Critical patent/WO2008128453A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
    • 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
    • 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2885—Static converters especially adapted therefor; Control thereof
    • H05B41/2887—Static converters especially adapted therefor; Control thereof characterised by a controllable bridge in the final stage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the present invention relates to the field of optoelectronic technology, and in particular to a power supply device and a dimming method.
  • PWM dimming refers to the rated brightness of the lamp when the lamp is turned on. When the lamp is turned off, the lamp is completely extinguished. By adjusting the ratio of the time when the lamp is turned on and the period of each switch, it is also called The air ratio can easily adjust the average brightness of the lamp, that is, the brightness perceived by the human eye. Since the dimming frequency is usually above 150 Hz, plus the factor of persistence of vision, the human eye does not feel the light and dark transition of the lamp, and only the average value of the transformation, that is, the average brightness of the lamp, can be felt.
  • the prior art uses a soft-start method to better reduce the dimming noise of the high-frequency transformer.
  • the operating frequency of the lamp power supply is gradually reduced from the high operating frequency at the start-up to the rated operating frequency to avoid a large impact on the high-frequency transformer; or, in the fixed-frequency widening mode, The turn-on time of the lamp power supply is gradually increased to the rated turn-on time, and the high-frequency transformer can be prevented from being greatly impacted.
  • These two methods can better reduce the dimming noise of the high-frequency transformer, but cannot be completely
  • the fundamental reason for eliminating the dimming noise of high-frequency transformers is that the dynamic balance of circuit parameters cannot be maintained.
  • the switching converter circuit uses a half-bridge circuit as shown in FIG. 1.
  • the potential of the circuit parameter point A in steady state is: El l + v , where E is the circuit input voltage, and Vin in the figure (below)
  • E is the circuit input voltage
  • Vin in the figure (below)
  • E is similar to this
  • ⁇ represents the potential offset of the half-bridge midpoint potential due to circuit parameter imbalance, which is always present during operation.
  • the change of the ⁇ point potential at each start-up is shown in Figure 2. It can be seen that the potential at point A has a stable process from £/2 to £/2 + ⁇ . Therefore, each time the start-up, the high-frequency transformer is also A transition process is required to reach a steady state, so dimming noise is difficult to eliminate.
  • Switching circuit is shown in Figure 3.
  • the potential of the circuit parameter DC-blocking capacitor C is ⁇ at steady state, and the potential at C is 0 when the operation is stopped. Therefore, each time it starts, from the stop state to the steady state, the voltage on C will have a transition process. As shown in Figure 4, this transition process will affect the operation of the high-frequency transformer, so that the high-frequency transformer also needs a The transition process reaches a steady state, so dimming noise is difficult to eliminate.
  • the switch conversion circuit is another half-bridge circuit as shown in Fig. 5. Every time it starts, from the stop state to the steady state, the potential change on the circuit parameter C is as shown in Fig. 6. Therefore, the high-frequency transformer also needs a The transition process reaches a steady state, and the dimming noise is difficult to eliminate.
  • the embodiment of the invention provides a power supply device and a dimming method, which can completely eliminate the dimming noise and realize PWM dimming.
  • embodiments of the present invention provide:
  • a power supply device comprising: a control circuit, a multi-switch conversion circuit, a transformer, a resonant capacitor; the control circuit controls a gradual change of an operating frequency of the multi-switch conversion circuit between a first frequency and a second frequency; The output of the multi-switching conversion circuit is connected to the primary side of the transformer, and the resonant capacitor is connected in series between the secondary side of the transformer and the load.
  • a power supply device comprising: a control circuit, a multi-switch conversion circuit, a transformer, a resonant capacitor, a resonant inductor; and the control circuit controls a gradual change of an operating frequency of the multi-switching conversion circuit between a first frequency and a second frequency ;
  • the resonant capacitor is connected in series between the output of the multi-switching conversion circuit and the primary side of the transformer; and the resonant inductor is connected in series between the secondary side of the transformer and the load.
  • a power supply device comprising: a control circuit, a multi-switch conversion circuit, a transformer, a resonance circuit; the control circuit controls a change frequency of an operating frequency of the multi-switch conversion circuit between a first frequency and a second frequency;
  • the resonant inductor and the resonant capacitor are connected in series to form a resonant circuit, and the resonant circuit is connected in series between an output of the multi-switching conversion circuit and a primary side of the transformer.
  • a method of dimming including:
  • the operating frequency of the control multi-switching conversion circuit changes gradually between the first frequency and the second frequency; the multi-switching conversion circuit drives the transformer to supply power to the lamp.
  • the operating frequency of the multi-switch conversion circuit used in the power supply device of the embodiment of the present invention changes gradually between the first frequency and the second frequency
  • the voltage of the load is increased according to the operating frequency of the multi-switch conversion circuit.
  • the rate changes.
  • the load is a lamp
  • the brightness and darkness of the lamp can be controlled to realize PWM dimming.
  • the PWM dimming mode is realized by changing the operating frequency of the multi-switch conversion circuit, and the lamp power supply does not need to be made.
  • the change of the working and stopping states can maintain the dynamic balance of the circuit parameters, thereby eliminating the dimming noise of the transformer.
  • FIG. 2 is a diagram showing a change in potential of point A in the half bridge circuit provided in FIG. 1 of the prior art
  • FIG. 4 is a diagram showing changes in the full bridge circuit of FIG. 3 of the prior art
  • Figure 5 is a half bridge circuit provided by the prior art
  • FIG. 6 is a diagram showing changes in the half bridge circuit provided in FIG. 5 of the prior art
  • FIG. 7 is a structural diagram of a power supply device according to Embodiment 1 of the present invention.
  • Embodiment 8 is a diagram showing changes in frequency signals outputted by a control circuit in Embodiment 1 of the present invention.
  • FIG. 9 is a diagram showing changes in frequency signals outputted by a control circuit according to Embodiment 1 of the present invention.
  • FIG. 10 is a schematic diagram of a working frequency gradation mode of a multi-switch conversion circuit according to Embodiment 1 of the present invention
  • FIG. 11 is a diagram showing changes of a load voltage according to an operating frequency according to an embodiment of the present invention
  • FIG. 12 is a circuit diagram of a power supply device for a half bridge circuit in a first embodiment of the present invention
  • FIG. 13 is a structural diagram of a power supply device according to Embodiment 2 of the present invention.
  • FIG. 14 is a structural diagram of a power supply device according to Embodiment 3 of the present invention.
  • FIG. 15 is a structural diagram of a power supply device according to Embodiment 4 of the present invention.
  • FIG. 16 is a flowchart of a dimming method according to Embodiment 5 of the present invention.
  • the present invention provides a power supply device including: a control circuit, a multi-switch conversion circuit, a transformer, and a resonance circuit.
  • Embodiment 1 of the present invention a power supply device according to Embodiment 1 of the present invention is provided, wherein:
  • the control circuit 71 outputs a frequency signal to the multi-switch conversion circuit 72 according to the external PWM dimming signal to control the operating frequency of the multi-switch conversion circuit 72.
  • the frequency signal output by the control circuit 71 is gradually changed between the first frequency and the second frequency. Varying, the first frequency and the second frequency are included between the first frequency and the second frequency; the first frequency is a frequency at a rated brightness of the lamp; the second frequency The rate is much higher than the nominal brightness of the lamp.
  • the change is: at the end of a half cycle of a frequency, switching from the positive half cycle of a frequency to the negative half cycle of the next frequency, as shown in FIG. 8, or switching from the negative half cycle of the one frequency to the lower half.
  • the positive half cycle of a frequency as shown in Figure 9.
  • the frequency and the next frequency refer to a frequency that is gradually changed between the first frequency and the second frequency; where ⁇ and ⁇ are the switching points of the frequency.
  • the multi-switching conversion circuit 72 operates at an operating frequency that varies gradually between the first frequency and the second frequency.
  • the manner of changing the operating frequency of the multi-switching conversion circuit 72 can be as shown in FIG. 10, wherein, the first frequency is the second frequency, the working frequency is from time to time, the frequency is from ⁇ to 2 time, and the operation is performed.
  • the frequency will be stable for a period of time on the frequency and frequency ,.
  • the lamp is off during the time period when the mark is OFF, and the lamp is on during the time period when the mark is ON.
  • the output of the multi-switching conversion circuit 72 is connected to the primary side of the transformer.
  • the transformer uses a high-leakage magnetic transformer, and the secondary leakage inductance and the capacitor are connected in series to form a resonant circuit, and the lamp is driven to simulate the load.
  • the voltage of the lamp analog load changes according to the operating frequency of the multi-switch conversion circuit 72. As shown in FIG. 11, when the operating frequency of the multi-switch conversion circuit 72 is / 2 , the voltage of the lamp analog load ? fl is ⁇ , When the lamp simulates the load?
  • the voltage on fl is lower than the voltage of the arc discharge of the lamp, and the lamp is extinguished; when the operating frequency of the multi-switch conversion circuit is /;, the voltage on the analog load of the lamp is, at this time, The voltage on the lamp analog load ⁇ is higher than the voltage of the arc discharge of the lamp, and the lamp is bright; the voltage on the lamp analog load ⁇ changes from the phase to the change of the lamp, and the lamp gradually darkens from bright to bright. Therefore, the output characteristic of the lamp analog load is related to the operating frequency of the multi-switch conversion circuit 72. By changing the operating frequency of the multi-switch conversion circuit 72, the brightness and darkness of the lamp can be changed, and PWM dimming is realized.
  • the multi-switch conversion circuit 72 can use a half bridge circuit and a full bridge circuit, and the actual application circuit diagram using the half bridge circuit is as shown in FIG.
  • the functions and connection relationships of the control circuit 71 and the multi-switch conversion circuit 72 are the same as in the first embodiment.
  • the voltage of the multi-switching conversion circuit 72 and the primary side of the transformer are connected in series with the resonant inductor transformer and the analog load of the lamp.
  • the voltage of the analog capacitor is simulated according to the operating frequency of the multi-switch converter circuit. 11 is shown. Therefore, the lamp simulates the load.
  • the output characteristic is related to the operating frequency of the multi-switching conversion circuit. By changing the operating frequency, the brightness and darkness of the lamp can be changed, and PWM dimming is realized.
  • a power supply device according to Embodiment 3 of the present invention is provided, wherein the functions and connection relationships of the control circuit 71 and the multi-switch conversion circuit 72 are the same as those in the first embodiment.
  • Resonant inductor and resonant capacitor ⁇ ( ⁇ form a resonance circuit, the resonance circuit connected in series between the transformer primary 72 and multi-switch converting circuit, the transformer secondary side series with the lamp load simulation ⁇ ; lamp voltage in accordance with a simulated load fl?
  • the operating frequency of the multi-switching conversion circuit 72 changes as shown in Fig. 11. Therefore, the output characteristic of the lamp analog load ⁇ is related to the operating frequency of the multi-switching conversion circuit, and by changing the operating frequency, the brightness and darkness of the lamp can be changed. PWM dimming.
  • a power supply device according to Embodiment 4 of the present invention is provided, wherein the functions and connection relationships of the control circuit 71 and the multi-switch conversion circuit 72 are the same as those in the first embodiment.
  • Multi-switch converting circuit between the output of the primary of the transformer 72 is connected in series with the series resonant inductor L r between the transformer and the secondary side resonance capacitor analog lamp load;
  • Lamp lamp voltage load simulation operates according to the multi-switch converting circuit 72
  • the frequency changes as shown in Figure 11. Therefore, the output characteristic of the lamp analog load? fl is related to the operating frequency of the multi-switch conversion circuit. By changing the operating frequency, the brightness and darkness of the lamp can be changed, and PWM dimming is realized.
  • the multi-switching conversion circuit in the power supply device of the embodiment of the present invention only changes the operating frequency without a change of the working or stopping state, so that the potential of the half point of the half bridge circuit as shown in FIG. 1 can be made.
  • the voltage in the full-bridge circuit shown in Figure 3 and the half-bridge circuit shown in Figure 5 is constant, that is, the potential at point A in Figure 1 and the hold at £/2 + ⁇ in Figure 5, the hold in Figure 3. At ⁇ , the dynamic balance of the circuit parameters can be maintained, thus eliminating the dimming noise of the transformer.
  • a flowchart of a dimming method according to Embodiment 5 of the present invention mainly includes the following steps:
  • Step 1601 The control circuit controls the operating frequency of the multi-switch conversion circuit to change gradually between the first frequency and the second frequency according to the external PWM dimming signal, and the frequency signal outputted by the control circuit changes as shown in FIG. 8 or FIG.
  • the operation frequency of the multi-switch conversion circuit is changed as shown in FIG. 10;
  • Step 1602 the multi-switching conversion circuit operates at the working frequency, and the driving transformer supplies power to the lamp tube; the multi-switching conversion circuit drives the transformer to supply power to the lamp tube in various ways, for example: the secondary side leakage inductance of the transformer and the resonance formed by the capacitor lamp driver circuitry; or series resonant inductor between the primary output of multi-switch converting circuit ⁇ transformer, the transformer and the secondary side series resonance between the dummy load lamp FL?
  • the vibration capacitor or the resonant inductor ⁇ and the resonant capacitor ( ⁇ constitute a resonant circuit, the transformer primary side and the multi-switching conversion circuit output are connected in series with the resonant circuit, the secondary side of the transformer and the lamp analog load ⁇ are connected in series; or, multi-switching a resonant capacitor connected in series between the transformer secondary and the dummy load R lamp lamp series resonant inductor L r and the output of the transformer between the primary circuit.
  • the above four methods can make the lamp simulate the load?
  • the voltage of fl changes according to the operating frequency of the multi-switch conversion circuit. As shown in Fig. 11, when the operating frequency of the multi-switch conversion circuit is / 2 , the lamp simulates the load. ⁇ The voltage is at this time, the lamp simulates the load? The voltage on fl is lower than the voltage of the arc discharge of the lamp, and the lamp is extinguished; when the operating frequency of the multi-switch conversion circuit is /;, the lamp simulates the load ⁇ When the voltage is at this time, the voltage on the analog load of the lamp is higher than the voltage of the arc discharge of the lamp, the lamp is bright; the lamp simulates the load?
  • the voltage on the fl changes from the phase to the change of the lamp, and the lamp gradually darkens from the light; therefore,
  • the output characteristic of the lamp analog load ⁇ is related to the operating frequency of the multi-switch conversion circuit. By changing the operating frequency, the brightness and darkness of the lamp can be changed, and PWM dimming is realized.
  • the operating frequency of the multi-switching conversion circuit used in the embodiment of the present invention is gradually changed between the first frequency and the second frequency, and the multi-switching conversion circuit is used to drive the transformer to supply power to the lamp, and the voltage of the lamp analog load is increased.
  • the operating frequency of the switching converter circuit changes, causing the lamp to change bright and dark, realizing PWM dimming. This way of changing the operating frequency of the multi-switching conversion circuit to realize PWM dimming does not require the multi-switching conversion circuit to stop working.
  • the operating frequency of the multi-switching conversion circuit is gradually switched between the first frequency and the second frequency: the control circuit controls the operating frequency of the multi-switching conversion circuit At the end of a half cycle of a frequency, switching from the positive half cycle of one frequency to the negative half cycle of the next frequency or from the negative half cycle of one frequency to the positive half cycle of the next frequency, can avoid noise generated by the high frequency transformer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

La présente invention concerne un dispositif d'alimentation et un procédé de réglage de lumière. Ce dispositif d'alimentation comprend un circuit convertisseur à commutation multiple (72), un transformateur (Tr), un circuit de résonance qui consiste en un condensateur de résonance (Cr) et un élément d'induction de résonance (Lr) et un circuit de contrôle de fréquence de commutation (71). Selon le signal de réglage de lumière PWM, le circuit de contrôle (71) contrôle la fréquence de fonctionnement du circuit convertisseur à commutation multiple (72) variant graduellement entre une première fréquence et une seconde fréquence.
PCT/CN2008/070533 2007-04-19 2008-03-19 Dispositif d'alimentation et procédé de réglage de lumière WO2008128453A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2007100983012A CN101064484A (zh) 2007-04-19 2007-04-19 一种电源装置及调光方法
CN200710098301.2 2007-04-19

Publications (1)

Publication Number Publication Date
WO2008128453A1 true WO2008128453A1 (fr) 2008-10-30

Family

ID=38965277

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/070533 WO2008128453A1 (fr) 2007-04-19 2008-03-19 Dispositif d'alimentation et procédé de réglage de lumière

Country Status (2)

Country Link
CN (1) CN101064484A (fr)
WO (1) WO2008128453A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316657A (zh) * 2011-07-18 2012-01-11 晴飞照明电器（上海）有限公司 输出频率连续可变的自激振荡逆变电源
CN102791069A (zh) * 2012-07-13 2012-11-21 晴飞照明电器（上海）有限公司 输出电流可控的电源
CN110236324A (zh) * 2019-04-11 2019-09-17 杨松 振动床腿、电动床及电动床的控制方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101064484A (zh) * 2007-04-19 2007-10-31 唯冠科技（深圳）有限公司 一种电源装置及调光方法
CN101587682B (zh) * 2008-05-23 2011-06-15 群康科技(深圳)有限公司 背光驱动电路
CN102800285B (zh) * 2011-05-25 2014-12-17 瑞轩科技股份有限公司 可控制外部灯源的显示装置与外部灯源的控制方法
CN108549476B (zh) * 2018-03-15 2020-07-10 维沃移动通信有限公司 一种smps工作频率切换的方法及终端

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1152609C (zh) * 1998-04-21 2004-06-02 电源电路创新公司 频率控制的、松耦合变压器的灯调光镇流器和驱动方法
CN1242539C (zh) * 2001-02-09 2006-02-15 台达电子工业股份有限公司 Llc串联共振dc/dc变换器
US7019465B2 (en) * 2003-08-13 2006-03-28 Koito Manufacturing Co., Ltd. Discharge lamp illumination circuit and discharge lamp illumination method
CN1756060A (zh) * 2004-09-30 2006-04-05 索尼株式会社 开关电源电路
CN101064484A (zh) * 2007-04-19 2007-10-31 唯冠科技（深圳）有限公司 一种电源装置及调光方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1152609C (zh) * 1998-04-21 2004-06-02 电源电路创新公司 频率控制的、松耦合变压器的灯调光镇流器和驱动方法
CN1242539C (zh) * 2001-02-09 2006-02-15 台达电子工业股份有限公司 Llc串联共振dc/dc变换器
US7019465B2 (en) * 2003-08-13 2006-03-28 Koito Manufacturing Co., Ltd. Discharge lamp illumination circuit and discharge lamp illumination method
CN1756060A (zh) * 2004-09-30 2006-04-05 索尼株式会社 开关电源电路
CN101064484A (zh) * 2007-04-19 2007-10-31 唯冠科技（深圳）有限公司 一种电源装置及调光方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316657A (zh) * 2011-07-18 2012-01-11 晴飞照明电器（上海）有限公司 输出频率连续可变的自激振荡逆变电源
CN102791069A (zh) * 2012-07-13 2012-11-21 晴飞照明电器（上海）有限公司 输出电流可控的电源
CN110236324A (zh) * 2019-04-11 2019-09-17 杨松 振动床腿、电动床及电动床的控制方法

Also Published As

Publication number Publication date
CN101064484A (zh) 2007-10-31

Similar Documents

Publication Publication Date Title
WO2008128453A1 (fr) Dispositif d'alimentation et procédé de réglage de lumière
JP4720828B2 (ja) 無電極放電ランプ用調光自在電子安定器及び照明器具
US20080122386A1 (en) Control Unit for a Lamp Driver Providing Smooth Transition Between Operation Modes
JP2004511195A (ja) Ｌｃｄ背面照明のための電圧給電プッシュプル共振インバータ
JP2008210537A (ja) 調光装置とそれを用いた照明器具
EP2987044A1 (fr) Dispositif de pilotage de diode electroluminescente (del) a base de convertisseur resonnant a auto-oscillation
EP2732678A2 (fr) Commande d'un convertisseur résonant
Lin Digital-dimming controller with current spikes elimination technique for LCD backlight electronic ballast
CN101141842A (zh) 电子镇流器
JPH076889A (ja) 放電灯点灯装置
Lin The design and implementation of a new digital dimming controller for the backlight resonant inverter
JPWO2004068914A1 (ja) 放電管点灯装置
JP5164782B2 (ja) 点灯装置
CN103379719A (zh) 放电灯点亮装置、包括其的照明设备和车辆
JP2005011714A (ja) 放電灯点灯装置
KR200225839Y1 (ko) 액정 표시 장치용 배면 광원 모듈
KR100878422B1 (ko) 다중 램프 백라이트 시스템 및 그 동작 제어 방법
JP3083447U (ja) 液晶表示装置のバックライト光源モジュール
KR20080072891A (ko) 적어도 하나의 방전 램프를 동작시키기 위한 장치
JP3585372B2 (ja) 放電灯点灯装置
TWI424671B (zh) Variable resonant gain of the converter
US8098020B2 (en) Circuit arrangement and method for operating a discharge lamp
CN203399385U (zh) 一种可调光无极灯镇流器
JP4871981B2 (ja) 点灯装置、及びこれを備えた画像表示装置
JP2005143252A (ja) インバータ回路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08715269

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08715269

Country of ref document: EP

Kind code of ref document: A1