WO2005122652A1 - 放電灯点灯装置及びプロジェクタ - Google Patents
放電灯点灯装置及びプロジェクタ Download PDFInfo
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- WO2005122652A1 WO2005122652A1 PCT/JP2005/005141 JP2005005141W WO2005122652A1 WO 2005122652 A1 WO2005122652 A1 WO 2005122652A1 JP 2005005141 W JP2005005141 W JP 2005005141W WO 2005122652 A1 WO2005122652 A1 WO 2005122652A1
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- Prior art keywords
- discharge lamp
- voltage
- power supply
- lighting device
- circuit
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Classifications
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- 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
- H05B41/2881—Load circuits; Control thereof
- H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
- H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
Definitions
- the present invention relates to a discharge lamp lighting device using a power supply unit for rectifying and smoothing a commercial AC power supply as a power supply for lighting, and more particularly to a technique for controlling a discharge lamp current to be constant.
- FIG. 13 shows a circuit diagram of a conventional discharge lamp lighting device.
- the discharge lamp lighting device shown in Fig. 13 has a DC power supply unit 3 that outputs a DC voltage Vdc obtained by rectifying and smoothing the voltage from the commercial AC power supply E, and a discharge lamp La connected to the output terminal of the power supply unit.
- a step-down chopper circuit 4 that controls power, an inverter circuit 6 that turns on the rectangular wave by inverting the voltage polarity of the discharge lamp La at a low frequency, and a discharge lamp current detection circuit composed of a discharge lamp current detection resistor R1 5, a discharge lamp voltage detection circuit 7 composed of discharge lamp voltage detection resistors R4 and R5, and a control circuit block 8 for performing power control.
- the discharge lamp detection voltage detected by the discharge lamp voltage detection circuit 7 is input to the A / D conversion input port of the microcomputer 80 in the control circuit block 8, and the digital value is output by the built-in A / D converter 81.
- the control unit 83 refers to the data table 82, and refers to the power control data Px (Px) corresponding to the lamp voltage data (0, 1,. XO, XI, ⁇ , X1023) are read and output as PWM signals.
- This PWM signal is averaged by a CR integration circuit including a resistor R6 and a capacitor C2, and transmitted to the PWM control circuit 84 as a reference voltage (command value).
- the step-down chopper circuit 4 supplies electric power corresponding to the output from the PWM control circuit 84 to the discharge lamp La.
- FIG. 14 shows the waveform of the DC voltage Vdc output from the DC power supply unit 3.
- Figure 15 shows the discharge lamp current detection voltage and the reference voltage at points A, B, and C on the DC voltage Vdc.
- FIG. 16 shows the current IQ1 flowing through the switching element Q1 at each point A, B, and C on the DC voltage Vdc.
- the PWM control circuit 84 detects a current IQ1 flowing through the switching element Q1 as a voltage across the resistor R1, and turns off the switching element Q1 when the detected voltage exceeds a reference voltage.
- a regenerative current of the inductor L1 for the chopper flows through the diode D1.
- the PWM control circuit 84 detects the zero-cross point of the regenerative current based on the detection current of the diode D1 or the secondary winding output of the inductor L1, or according to the timing of the built-in oscillation circuit of the PWM control circuit 84. Turn on switching element Q1 again. As a result, the discharge lamp current is controlled to be a current corresponding to the reference voltage.
- the DC voltage Vdc output from the DC power supply unit 3 is smoothed by the capacitor C1, it fluctuates in the range of several volts to several tens of volts (hereinafter referred to as “ Ripple ").
- Ripple the frequency of a commercial AC power supply
- the lip-notch frequency of the power supply is about 120 Hz.
- the detection voltage slightly exceeds the reference voltage due to the delay time tl (several ns to several hundred ns) of the response speed of the PWM control circuit 84 in the control circuit block 8. As shown in FIG.
- Patent Literature 1 and Patent Literature 2 disclose means for reducing a lamp flit force against electrode deterioration of a lamp in a rectangular wave lighting method. However, such a means alone cannot solve the problem of the lamp flicking force caused by the control generated in the discharge lamp lighting circuit itself.
- Patent Document 1 Japanese Patent Publication No. 2002-532866
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-134287
- the present invention has been made to solve the above problems, and an object of the present invention is to reduce flicker in a discharge lamp lighting device in which a power supply unit for rectifying and smoothing a commercial AC power supply is used as a lighting power supply. It is to provide a discharge lamp lighting device that can be suppressed. Another object of the present invention is to provide a projector using such a discharge lamp lighting device. Means for solving the problem
- a discharge lamp lighting device includes: a DC power supply unit that rectifies and smoothes an AC voltage and outputs a DC voltage; a current detection circuit that detects a current flowing through the discharge lamp; A power supply ripple detection circuit that detects voltage fluctuations of the power supply supplied from the DC power supply and outputs a voltage obtained by superimposing the detected voltage on a detection voltage from the current detection circuit, and outputs the voltage based on the output voltage from the power supply ripple detection circuit.
- a control circuit for controlling an output voltage to the discharge lamp so that a current flowing through the discharge lamp becomes a constant current.
- a discharge lamp lighting device includes: a DC power supply unit that rectifies and smoothes an AC voltage and outputs a DC voltage; a voltage detection circuit that detects a voltage applied to the discharge lamp; A power supply ripple detection circuit that detects voltage fluctuations in the power supply supplied from the DC power supply unit, and a power supply ripple detection circuit that detects the power supply ripple based on the reference voltage generated based on the detection voltage from the voltage detection circuit A control circuit that superimposes an output voltage from the circuit and controls an output voltage to the discharge lamp based on the superimposed voltage so that a current flowing through the discharge lamp becomes a constant current.
- a voltage lip current of a power supply supplied from the power supply unit is detected, and a discharge lamp current is detected.
- the current By controlling the current to be a constant current, it is possible to reduce the lip of the discharge lamp current and suppress flickering.
- FIG. 1 is a circuit diagram of Embodiment 1 of the present invention.
- FIG. 2 is a waveform diagram showing a discharge lamp current detection voltage waveform and a reference voltage waveform according to Embodiment 1 of the present invention.
- FIG. 3 is a waveform diagram showing a current waveform of a switching element according to Embodiment 1 of the present invention.
- FIG. 4 is a diagram showing a configuration of a discharge lamp provided with a reflecting mirror.
- FIG. 5 is a circuit diagram of Embodiment 2 of the present invention.
- FIG. 6 is a waveform diagram showing a power supply ripple detection voltage waveform, an initial reference voltage waveform, and a reference voltage waveform according to Embodiment 2 of the present invention.
- FIG. 7 is a waveform chart showing a discharge lamp current detection voltage waveform and a reference voltage waveform according to Embodiment 2 of the present invention.
- FIG. 8 is a waveform diagram showing a current waveform of a switching element according to Embodiment 2 of the present invention.
- FIG. 9 is a circuit diagram of Embodiment 3 of the present invention.
- FIG. 10 is a circuit diagram of Embodiment 4 of the present invention.
- FIG. 11 is a plan view showing a main part configuration of Embodiment 5 of the present invention.
- FIG. 12A is a perspective view of a projector according to the present invention.
- FIG. 12B is a diagram showing an internal configuration of the projector according to the present invention.
- FIG. 13 is a circuit diagram of a conventional example.
- FIG. 14 is a waveform diagram showing a power supply voltage waveform of a conventional example.
- FIG. 15 is a waveform diagram showing a discharge lamp current detection voltage waveform and a reference voltage waveform of a conventional example.
- FIG. 16 is a waveform diagram showing a current waveform of a conventional switching element. Explanation of reference numerals
- FIG. 1 shows a circuit diagram of the first embodiment of the present invention.
- the discharge lamp lighting device shown in Fig. 1 has a DC power supply unit 3 that outputs a DC voltage Vdc obtained by rectifying and smoothing the voltage from the commercial AC power supply E, and a discharge lamp La connected to the output terminal of the DC power supply unit 3.
- a step-down chopper circuit 4 for controlling the power of the discharge lamp, a discharge lamp current detection circuit 5 for detecting a current flowing through the discharge lamp La, and an inverter for lighting the rectangular wave by inverting the voltage polarity of the discharge lamp La at a low frequency.
- DC power supply section 3 includes a diode bridge circuit 1 connected to commercial AC power supply E, a step-up chopper circuit 2, and a smoothing capacitor C1.
- the step-down chopper circuit 4 includes a switching element Ql, an inductor Ll, and a diode D1.
- the discharge lamp current detection circuit 5 includes a discharge lamp current detection resistor R1.
- the discharge lamp voltage detection circuit 7 is composed of voltage detection resistors R4 and R5.
- the control circuit block 8 outputs a PWM signal to the PWM control circuit 84 that controls the switching element Q1 of the step-down chopper circuit 4 and the PWM control circuit 84 that is the output of the discharge lamp voltage detection circuit 7. And a microcomputer 80 to be executed.
- the microcomputer 80 includes an A / D converter 81, a data table 82, and a control unit 83.
- the microcomputer 80 can be constituted by, for example, an 8-bit microcomputer M37540 manufactured by Mitsubishi Electric Corporation (same as the following embodiment).
- the power supply ripple detection circuit 9 detects a power supply ripple component of the output voltage Vdc of the DC power supply unit 3 and superimposes the power supply ripple component on the discharge lamp current detection voltage detected by the discharge lamp current detection circuit 5.
- the discharge lamp detection voltage detected by the discharge lamp voltage detection circuit 7 is input to the A / D conversion input port of the microcomputer 80 in the control circuit block 8, and is converted to a digital value by the AZD converter 81.
- the control unit 83 reads the power control data Px (X0, XI,..., X1023) corresponding to the lamp voltage data (0, 1,..., 1023) converted into digital values with reference to the data table 82. It is output as a PWM signal (a rectangular wave signal with a constant period and a variable ON period). This PWM signal is averaged by a CR integration circuit including a resistor R6 and a capacitor C2, and transmitted to the PWM control circuit 84 as a reference voltage (command value).
- the PWM control circuit 84 outputs a control signal to the step-down chopper circuit based on the detection voltage and the reference voltage. That is, the PWM control circuit 84 inputs the detection voltage from the power supply ripple detection circuit 9 and the reference voltage from the microcomputer 80, and turns off the switching element Q1 when the detection voltage exceeds the reference voltage. When the switching element Q1 is turned off, the regenerative current of the inductor L1 for the chopper flows through the diode D1. The PWM control circuit 84 detects the zero-cross point of the regenerative current based on the detection voltage from the power supply ripple detection circuit 9 or the secondary winding output of the inductor L1, or detects the timing by the internal oscillation circuit of the PWM control circuit 84. , The switching element Q1 is turned on again.
- the step-down discharge circuit 4 supplies power to the discharge lamp La according to a control signal from the PWM control circuit 84.
- the microcomputer 80 including the data table 82 is used as a means for generating the reference voltage of the PWM control circuit 84 in accordance with the detected value of the lamp voltage Via, but is not limited thereto. It's not something. In short, the run depends on the detected value of the lamp voltage. If the target value of the lamp power can be set and the target value of the lamp current for realizing the lamp power can be output as the reference voltage, other means can be used. Note that the discharge lamp lighting device requires an igniter circuit for applying a high voltage noise when the discharge lamp La is started, but is not shown here.
- FIG. 2 shows the detected voltage and reference voltage of the discharge lamp current at points A, B, and C on the DC voltage Vdc in the discharge lamp lighting device of the present embodiment.
- points A, B, and C in FIG. 2 correspond to points A, B, and C in FIG.
- FIG. 3 shows the current IQ1 flowing through the switching element Q1 at each point A, B, C on the DC voltage Vdc in the discharge lamp lighting device of the present embodiment.
- the detection voltage shown in FIG. 2 is a voltage in which a power supply ripple component divided by resistors R2 and R3 is superimposed on a detection value of current IQ1 of switching element Q1 detected by resistor R1.
- VA1 is superimposed on the detected value of current IQ1 at point A
- VB1 is superimposed on point B
- VC1 is superimposed on point C.
- VA1> VB1> VC1 reflecting the DC voltage Vdc in FIG.
- the switching element Q1 of the step-down chopper circuit 4 is ON / OFF controlled by the PWM control circuit 84 at a frequency sufficiently higher than the frequency (50 Hz or 60 Hz) of the commercial AC power supply E.
- the switching element Q1 is ON, the current IQ1 flowing through the resistor R1 increases gradually.
- the voltage detected by the resistor R1 exceeds this reference voltage, the switching element Q1 is turned off.
- the control involves a predetermined delay time tl.
- the slope of the gradually increasing current I Q1 is greater at point B than at point C, and at point A than at point B. Therefore, conventionally, at the point A, the current IQ1 gradually increasing as shown in FIG. 16 is excessive.
- the voltage VA1 superimposed on the detection voltage becomes large and the switching element Q1 Is turned off, so that proper control is performed.
- the power supply ripple component divided by the resistors R2 and R3 is superimposed on the voltage detected by the resistor R1, and thus the above operation is performed with a simple circuit configuration.
- the resistor R1 has a relatively low resistance value for current detection
- the resistors R2 and R3 for dividing the DC voltage Vdc have a relatively high resistance value for voltage detection.
- the specification of the discharge lamp La to be turned on may be an AC lamp or a DC lamp.
- the discharge lamp La is an AC lamp
- a rectangular wave is lit by inverting the polarity of the lamp voltage at a low frequency by the inverter circuit 6.
- the inverter circuit 6 may be a full-bridge circuit or a half-bridge circuit.
- the inverter circuit 6 may have a function of inverting the polarity of the input DC voltage at a predetermined cycle and outputting it as an AC voltage. Good.
- the discharge lamp voltage detection circuit 7 is connected to detect the output voltage of the inverter circuit 6, but the discharge lamp voltage detection circuit 7 is configured to detect the input voltage of the inverter circuit 6. May be connected.
- the discharge lamp La is a DC lamp
- the inverter circuit 6 is omitted, and the discharge lamp La is DC-lit by the output of the step-down chopper circuit 4.
- a smoothing capacitor may be connected in parallel to the output of the step-down chopper circuit 4.
- the discharge lamp La to be turned on may have a reflector 51 as shown in FIG. The same applies to the following embodiments.
- FIG. 5 shows a circuit diagram of the second embodiment of the present invention.
- the discharge lamp lighting device of the present embodiment is different from the discharge lamp lighting device of the first embodiment shown in FIG. 1 in the configuration of the power supply ripple detection circuit 9 and the control circuit block 8.
- the control circuit block 8 in the discharge lamp lighting device of the present embodiment includes a microcomputer 80 and a PW An M control circuit 84, a voltage adding circuit 85, and a phase control circuit 86 are included.
- the power supply ripple detection circuit 9 is composed of a series circuit of a resistor R2 and a resistor R3 connected between the high-voltage output terminal and the low-voltage output terminal of the DC power supply unit 3, and connects the power supply voltage Vdc with the resistance R2.
- the voltage divided by the anti-R3 is directly input to the control circuit block 8.
- the discharge lamp detection voltage detected by the discharge lamp voltage detection circuit 7 is input to the A / D conversion input port of the microcomputer 80 in the control circuit block 8, and the digital value is output by the built-in A / D converter 81.
- the control unit 83 refers to the data table 82, reads out the power control data Px (XO, XI, ⁇ , X1023) corresponding to the lamp voltage data (0, 1, ..., 1023) converted into the digital value, Output as PWM signal.
- This PWM signal is averaged by a CR integrator comprising a resistor R6 and a capacitor C2, and is input to a voltage adder 85.
- the phase control circuit 86 inverts the phase of the output of the power supply lip detection circuit 9.
- the voltage adding circuit 85 adds the averaged PWM signal to the output of the phase control circuit 86 and outputs the result to the PWM control circuit 84 as a reference voltage (command value).
- the PWM control circuit 84 controls the switching element Q1 of the step-down chopper circuit 4 by outputting a control signal based on the detected current and the reference voltage, and supplies power to the discharge lamp La as needed.
- FIG. 6A shows a power supply ripple detection voltage detected by the power supply ripple detection circuit 9 and input to the phase control circuit 86.
- FIG. 6B shows the initial reference voltage output from the microcomputer 80, averaged by the CR integrator and input to the voltage adder 85.
- FIG. 6 (c) shows a reference voltage input to the PWM control circuit 84 on which the opposite phase of the power supply ripple detection voltage is superimposed.
- FIG. 7 shows the discharge lamp current detection voltage and the reference voltage at points A, B, and C on the DC voltage Vdc in the discharge lamp lighting device of the present embodiment. Note that points A, B, and C in FIG. 7 correspond to points A, B, and C in FIG.
- FIG. 8 shows a current IQ1 flowing through the switching element Q1 at each point A, B, C on the DC voltage Vdc in the discharge lamp lighting device of the present embodiment.
- the power supply ripple detection voltage (see FIG. 6 (a)) detected by the power supply ripple detection circuit 9 is converted into a reverse phase voltage by the phase control circuit 86, and this reverse phase voltage is output from the microcomputer 80.
- the reference voltage (see Fig. 6 (c)) is set by superimposing it on the initial reference voltage (see Fig. 6 (b)).
- FIG. 7 the influence of the inclination of the current IQ1 flowing through the switching element Q1 due to the delay time tl of the PWM control circuit 84 and the ripple voltage of the DC voltage Vdc can be eliminated, and as shown in FIG.
- the peak value of the current I Q1 flowing through the switching element Q1 is constant.
- the current ILa flowing through the discharge lamp La becomes constant, and the desired characteristics can be obtained.
- FIG. 9 shows a circuit diagram of a third embodiment of the present invention.
- control is performed to switch the superposition ratio of the detection voltage of the power supply according to the discharge lamp voltage.
- the discharge lamp lighting device of the present embodiment is different from the discharge lamp lighting device of the second embodiment in the configuration of the control circuit block 8.
- the control circuit block 8 of the present embodiment includes a microcomputer 80, a PWM control circuit 84, and a voltage adding circuit 85.
- the data table 82 in the microcomputer 80 stores the discharge lamp voltage, the lamp power Px, and the voltage ripple superimposition data Vxx in association with each other.
- the power control data Px is the command value (XO, XI,..., X1023) of the power control data for the detected value of the lamp voltage (0, 1,..., 1023).
- the ripple superimposition data Vxx is a command value (XX0, XXI,..., XX1023) of the ripple superimposition data with respect to the detected value (0, 1,..., 1023) of the ramp voltage.
- the data table 82 for example, if the detected value of the lamp voltage is n, the command value of the power control data is Xn and the command value of the ripple superimposition data is X Xn.
- the discharge lamp detection voltage detected by the discharge lamp voltage detection circuit 7 is input to the A / D conversion input port of the microcomputer 80 in the control circuit block 8, and the digital value is output by the built-in A / D converter 81. Is converted to The control unit 83 refers to the data table 82, reads out the power control data Px (XO, XI, ⁇ , X1023) corresponding to the lamp voltage data (0, 1, ..., 1023) converted into the digital value, Output as PWM signal.
- This PWM signal is The result is averaged by a CR integration circuit composed of a resistor R6 and a capacitor C2, and transmitted to the PWM control circuit 84 as a reference voltage (command value).
- the step-down chopper circuit 4 supplies the power as a control signal from the PWM control circuit 84 and electric power as needed to the discharge lamp La.
- control unit 83 refers to the data table 82 and reads out the lamp voltage data (0, 1,..., 1023) (the corresponding lip current weight data Vxx (XX0, XXI, ⁇ , XX1023)).
- the PWM signal is averaged by a CR integrator comprising a resistor R7 and a capacitor C3, and is input to a voltage adder 85 as superimposition ratio data.
- the voltage addition circuit 85 superimposes the power supply ripple component of the output voltage Vdc of the DC power supply unit 3 detected by the power supply ripple detection circuit 9 on the discharge lamp current detection voltage detected by the discharge lamp current detection circuit 5 .
- the voltage adding circuit 85 switches the superposition rate based on the potential of the capacitor C3.
- the detected value of the lamp voltage and the power control data Px correspond according to the data table 82, and as a result, the superposition rate of the detected voltage of the power supply according to the power supplied to the discharge lamp That is, the control for switching is performed.
- FIG. 10 shows a circuit diagram of the fourth embodiment of the present invention.
- the discharge lamp lighting device of the present embodiment is different from the discharge lamp lighting device of the third embodiment in the contents of the data table 82. That is, as shown in FIG. 10, the discharge lamp lighting device of the present embodiment has a table of discharge lamp voltage / discharge lamp power / voltage ripple superimposition data in the data table 82 corresponding to different lamp types. Prepare each. This makes it possible to handle a plurality of different types of lamps.
- the power control data Px is a command value (XO, XI,..., X1023) of the power control data with respect to the lamp voltage detection value (0, 1,..., 1023) for the first lamp type. ).
- the ripple superimposition data Vxx is the detected lamp voltage (0 , 1, ⁇ ⁇ ⁇ , 1023) t It is the command value (XXO, XXI, ⁇ ⁇ ⁇ , XX1023) of the lip-knolling weight data.
- the power control data Py and the ripple superimposition data Vyy are respectively the command values (Y0, Y1) of the power control data for the detected lamp voltage values (0, 1,..., 1023) for the second lamp type. , ⁇ ⁇ ⁇ , Y1023) and the instruction ( ⁇ , YY1,..., YY1023) of the superimposition data of the lip pattern.
- the signal for specifying the lamp type can be set by the input port status (High level power or Low level power) of the microcomputer 80 or the input port. Or by detecting the temporal variation of the lamp voltage Via after the power is turned on, the type of the lamp La is determined, and the table data of the difference and the deviation is selected.
- the power supply ripple component may be superimposed on the reference voltage instead of the detection voltage.
- FIG. 11 is a plan view showing a configuration of a main part of Embodiment 5 of the present invention, and shows a circuit pattern of a printed wiring board around a smoothing capacitor C1 and an inductor L1.
- the detection circuit pattern for detecting the power supply is not arranged below the winding (coinole) that operates at a high frequency in a normal state.
- components Rl, R2, R3 in the circuit pattern surrounded by broken lines correspond to the above-described resistors Rl, R2, R3, respectively.
- the components Rl, R2, and R3 are arranged on the side of the inductor (coil) L1 for the fever that operates at a high frequency in a normal state, and are not arranged below the inductor.
- FIG. 12A is a perspective view of a projector provided with the discharge lamp lighting device of each embodiment.
- FIG. 12B is a diagram showing the internal configuration of the projector.
- the projector 100 includes a power supply unit 101, a discharge lamp lighting device 103, an optical system 105, a main control board 107, an external signal input unit 109, a cooling fan 111, and a discharge lamp La.
- the discharge lamp lighting device 103 is the lighting device (excluding the DC power supply unit 3) described in each of the above embodiments.
- On the main control board 107 circuit components and the like for performing image signal processing are mounted.
- An external video signal and image signal are input via the external signal input unit 109.
- DC power is supplied from the power supply unit 101 to the discharge lamp lighting device 103.
- the discharge lamp lighting device 103 turns on the discharge lamp La.
- the light from the discharge lamp La is output to the outside via the optical system 105 according to the video signal and the image signal from the outside.
- discharge lamp lighting device of each of the above embodiments can be applied to an inspection light source or the like as a flicker-free lighting device other than the projector.
Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/570,054 US7504782B2 (en) | 2004-06-10 | 2005-03-22 | Discharge lamp lighting apparatus and projector |
CN2005800185030A CN1989788B (zh) | 2004-06-10 | 2005-03-22 | 放电灯点亮装置及投影仪 |
EP05727042.3A EP1755364B1 (en) | 2004-06-10 | 2005-03-22 | Discharge lamp lighting device and projector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004173154A JP4241515B2 (ja) | 2004-06-10 | 2004-06-10 | 放電灯点灯装置及びプロジェクタ |
JP2004-173154 | 2004-06-10 |
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WO2005122652A1 true WO2005122652A1 (ja) | 2005-12-22 |
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PCT/JP2005/005141 WO2005122652A1 (ja) | 2004-06-10 | 2005-03-22 | 放電灯点灯装置及びプロジェクタ |
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US (1) | US7504782B2 (ja) |
EP (1) | EP1755364B1 (ja) |
JP (1) | JP4241515B2 (ja) |
CN (1) | CN1989788B (ja) |
WO (1) | WO2005122652A1 (ja) |
Families Citing this family (25)
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US20090079348A1 (en) * | 2005-04-25 | 2009-03-26 | Harison Toshiba Lighting Corp. | Discharge lamp lighting apparatus and discharge lamp lighting control method |
DE102005031835A1 (de) * | 2005-07-06 | 2007-01-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Vorrichtung zum Betreiben einer Hochdruckentladungslampe |
JP4915638B2 (ja) * | 2005-08-26 | 2012-04-11 | パナソニック株式会社 | 無電極放電灯装置及びこの無電極放電灯装置を備えた照明器具 |
JP2007059358A (ja) * | 2005-08-26 | 2007-03-08 | Matsushita Electric Works Ltd | 無電極放電ランプ |
JP4735239B2 (ja) * | 2005-12-22 | 2011-07-27 | パナソニック電工株式会社 | 放電灯点灯装置及び画像表示装置 |
JP5038690B2 (ja) * | 2006-01-17 | 2012-10-03 | パナソニック株式会社 | 照明器具 |
JP4697050B2 (ja) * | 2006-05-26 | 2011-06-08 | パナソニック電工株式会社 | 放電灯点灯装置及び照明器具 |
JP4793122B2 (ja) * | 2006-06-21 | 2011-10-12 | パナソニック電工株式会社 | 放電灯点灯装置及び画像表示装置 |
JP4631817B2 (ja) * | 2006-06-27 | 2011-02-16 | パナソニック電工株式会社 | 放電灯点灯装置及び照明器具 |
JP2008010153A (ja) * | 2006-06-27 | 2008-01-17 | Matsushita Electric Works Ltd | 放電灯点灯装置及び照明器具 |
JP4802906B2 (ja) * | 2006-07-24 | 2011-10-26 | パナソニック電工株式会社 | 放電灯点灯装置及びプロジェクタ |
JP4687612B2 (ja) * | 2006-08-25 | 2011-05-25 | パナソニック電工株式会社 | 高圧放電灯点灯装置及び照明器具 |
JP4826388B2 (ja) | 2006-08-25 | 2011-11-30 | パナソニック電工株式会社 | 高圧放電灯点灯装置及び照明器具 |
JP4608470B2 (ja) * | 2006-08-31 | 2011-01-12 | パナソニック電工株式会社 | 放電灯点灯装置、及び照明装置 |
KR20090079982A (ko) * | 2006-11-09 | 2009-07-22 | 오스람 게젤샤프트 미트 베쉬랭크터 하프퉁 | 방전 램프를 시동시키기 위한 회로 어레인지먼트 |
JP5027498B2 (ja) * | 2006-12-25 | 2012-09-19 | パナソニック株式会社 | 放電灯点灯装置および画像表示装置 |
KR101361517B1 (ko) | 2007-02-26 | 2014-02-24 | 삼성전자 주식회사 | 백라이트 유닛, 이를 포함하는 액정표시장치 및 그제어방법 |
JP4506781B2 (ja) * | 2007-05-18 | 2010-07-21 | 船井電機株式会社 | プロジェクタ用ランプの駆動回路 |
JP4379532B2 (ja) * | 2007-07-26 | 2009-12-09 | パナソニック電工株式会社 | 照明装置 |
JP5601294B2 (ja) * | 2011-08-29 | 2014-10-08 | 株式会社島津製作所 | 光源装置 |
US9160240B2 (en) * | 2012-09-05 | 2015-10-13 | Kyosan Electric Mfg. Co., Ltd. | DC power supply device, and control method for DC power supply device |
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JP5729732B2 (ja) * | 2013-09-27 | 2015-06-03 | 株式会社京三製作所 | 直流電源装置、直流電源装置の制御方法 |
WO2019064695A1 (ja) | 2017-09-28 | 2019-04-04 | 株式会社三社電機製作所 | 放電ランプ点灯制御装置およびランプ電流供給方法 |
TWI703897B (zh) * | 2019-05-07 | 2020-09-01 | 益力半導體股份有限公司 | 自適應調光驅動系統 |
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- 2004-06-10 JP JP2004173154A patent/JP4241515B2/ja not_active Expired - Fee Related
-
2005
- 2005-03-22 CN CN2005800185030A patent/CN1989788B/zh not_active Expired - Fee Related
- 2005-03-22 EP EP05727042.3A patent/EP1755364B1/en not_active Expired - Fee Related
- 2005-03-22 US US11/570,054 patent/US7504782B2/en not_active Expired - Fee Related
- 2005-03-22 WO PCT/JP2005/005141 patent/WO2005122652A1/ja active Application Filing
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See also references of EP1755364A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN1989788A (zh) | 2007-06-27 |
EP1755364A1 (en) | 2007-02-21 |
US20080048586A1 (en) | 2008-02-28 |
US7504782B2 (en) | 2009-03-17 |
EP1755364B1 (en) | 2016-05-11 |
JP4241515B2 (ja) | 2009-03-18 |
CN1989788B (zh) | 2011-11-30 |
EP1755364A4 (en) | 2014-04-30 |
JP2005353423A (ja) | 2005-12-22 |
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