WO2004112444A1 - 放電灯点灯装置 - Google Patents
放電灯点灯装置 Download PDFInfo
- Publication number
- WO2004112444A1 WO2004112444A1 PCT/JP2004/008194 JP2004008194W WO2004112444A1 WO 2004112444 A1 WO2004112444 A1 WO 2004112444A1 JP 2004008194 W JP2004008194 W JP 2004008194W WO 2004112444 A1 WO2004112444 A1 WO 2004112444A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency
- discharge lamp
- drive signal
- lighting device
- khz
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
-
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
Definitions
- the present invention relates to a discharge lamp lighting device used for an external electrode type fluorescent lamp.
- the principle of the outer electrode type dielectric barrier discharge using a rare gas is generally as follows.
- a discharge plasma space is formed in the lamp tube in which the filled rare gas generates excimer molecules by dielectric barrier discharge.
- At least one of a pair of electrodes for inducing a discharge phenomenon in the rare gas is disposed on the outer surface of the glass tube to form an outer electrode, and a dielectric material is disposed between the outer electrode and the rare gas for discharge. It is configured to interpose a material.
- a power supply device for applying a high-frequency high voltage is connected to the outer surface electrode through a step-up transformer, and the rare gas discharge lamp is lit by the high-frequency high voltage supplied from the power supply device.
- FIG. 1 is a diagram showing a structure of an external electrode fluorescent lamp in which xenon gas is sealed, as an example of an external electrode type dielectric barrier discharge lamp, wherein (a) is a side view and (b) is a side sectional view. is there.
- a discharge medium containing at least xenon is sealed in a glass tube 1
- a phosphor 2 is provided on the inner wall thereof.
- An internal electrode 4 is sealed at one end of the glass tube 1 via an introduction wire 3.
- a conductive material 1 of an arbitrary shape, for example, a linear conductive material (conductive wire) wound in a spiral shape is installed along the tube axis direction. Used.
- the surface of the glass tube 1 on which the external electrode 5 is installed is covered with a translucent heat-shrinkable tube 6, thereby preventing the external electrode 5 from being displaced.
- the internal electrode 4 is connected to a voltage supply line 8 via a lead-in line 3, and the external electrode 5 is connected to a voltage supply line 8 ′ via a fixing metal bar 7.
- a high-frequency voltage that changes to positive or negative is supplied between the electrodes 4 and 5 from a power supply (inverter) 9 via voltage supply lines 8 and 8 '.
- a power supply (inverter) 9 By this Discharge starts in the lath tube 1 and ultraviolet light is emitted from xenon.
- the ultraviolet rays are applied to the phosphor 2 applied to the inner wall of the glass tube 1 and converted into visible light there. This visible light is emitted from the glass tube 1 to the outside and is used as a light source.
- FIG. 2 and FIG. 3 are block diagrams showing a schematic configuration of a discharge lamp lighting device conventionally used for lighting the above-mentioned external electrode type fluorescent lamp.
- an external electrode type fluorescent lamp 13 is connected to the secondary winding side of the transformer T1.
- One end of the primary winding of the transformer T1 is connected to a connection point of a pair of capacitors Cl and C2 connected in series.
- the capacitors Cl and C2 connected in series are connected between the power supply Vcc and the ground potential point GND. That is, one end of the primary winding of the transformer T1 is connected to a midpoint potential with respect to a bias voltage between the power supply voltage Vcc and the ground.
- the other end of the primary winding of the transformer T1 is connected to a connection point of a pair of circuit elements Zl and Z2 connected in series.
- Each of the circuit elements Zl and Z2 is composed of an element having a resistance component such as a coil, a diode, and a resistor, or an element group obtained by combining the elements.
- the circuit elements Zl and Z2 connected in series are connected between the power supply Vcc and the ground GND via the semiconductor switching elements Sl and S2, respectively.
- the semiconductor switching elements Sl and S2 are turned on / off alternately by the drive signal (1) 11 and the drive signal (2) 12 output from the control circuit 10, and a high-frequency rectangular wave is applied to the primary winding of the transformer T1. Supply voltage.
- FIG. 2 shows that the semiconductor switching element S1 is turned off by the drive signal (1) 11 and the semiconductor switching element S2 is turned on by the drive signal (2) 12, so that a dashed arrow appears on the primary winding of the transformer T1.
- the current I as shown by
- the working state is shown. That is, the current I flows through the circuit of the power supply Vcc, the capacitor C1, the primary winding of the transformer T1, the circuit element Z2, the semiconductor switching element S2, and the ground GND.
- FIG. 3 shows that the semiconductor switching element S1 is turned on by the drive signal (1) 11 and the semiconductor switching element S2 is turned off by the drive signal (2) 12, so that a dashed arrow is formed on the primary winding of the transformer T1.
- the current I as shown in the figure below generates a negative lamp current as described later.
- Child Z1 Primary winding of transformer T1—Capacitor C2—Ground Flows to the GND circuit.
- FIG. 4 shows the driving signals (1) 11 and (2) 1 in the discharge lamp lighting device shown in FIGS. 2 and 3.
- 2 is a timing chart showing waveforms of a voltage generated in the primary winding of the transformer Tl and a lamp current flowing in the external electrode type fluorescent lamp 13 connected to the secondary winding of the transformer Tl.
- the driving signal (1) 11 and the driving signal (2) 12 are different from each other in the phase of the repetition period by 180 degrees.
- the voltage generated on the next winding repeats the change between low level (L) and high level (H) as L ⁇ H ⁇ L ⁇ H ⁇ L ⁇ H....
- L low level
- H high level
- positive and negative lamp currents are supplied into the xenon outer electrode type fluorescent lamp 13 connected to the secondary winding of the transformer T1.
- the timing chart of FIG. 4 is a waveform chart when the frequency of the drive signal (1) 11 and the drive signal (2) 12 is 20 kHz and the dimming rate is 2%.
- FIG. 5 is a waveform diagram in which the lamp voltage and current at a frequency of 20kHz and a dimming rate of 100% are observed with an oscilloscope.
- FIG. 6 is an enlarged waveform diagram showing a portion indicated by B1 in FIG.
- the high-frequency pulse voltage output from the secondary winding of the transformer T1 is generally selected to have a repetition frequency in the range of 18 kHz to 20 kHz. Driving a discharge lamp with a high-frequency pulse voltage can light the lamp. Note that, at a frequency of 20 kHz or less, the transformer generates a vibration sound in an audible range. Therefore, the discharge lamp lighting device is actually driven by a high-frequency pulse voltage near 20 kHz.
- Such a conventional discharge lamp lighting device has a drawback that sufficient light emission luminance of the lamp cannot be obtained. Therefore, if the peak value of the lamp current is increased in order to increase the input power to the lamp and improve the brightness, the electric field in the glass tube becomes too strong and the positive column shrinks. As a result, on the contrary, there is a problem that the luminance of the lamp is reduced, and the luminance of the lamp is flickered, so that stable light emission cannot be obtained.
- the present invention has been made in view of such a conventional technical problem, and a discharge which can illuminate an external electrode type dielectric barrier discharge lamp using a rare gas with high brightness without flickering. It is an object to provide a lamp lighting device.
- Another object of the present invention is to provide a discharge lamp lighting device capable of lighting without flickering even when an external electrode type dielectric barrier discharge lamp using a rare gas operates at a low dimming rate.
- FIG. 7 shows the results of measuring the relationship between the luminance and the frequency when the input power was constant when the gas pressure of the rare gas in the external electrode type fluorescent lamp with the structure shown in Fig.
- FIG. 8 is a characteristic diagram showing the result of measuring the relationship between the luminance of the discharge lamp and the driving frequency of the discharge lamp lighting device when the input voltage is constant.
- the external electrode type fluorescent lamp used for the measurement has a tube length of 160 mm, a tube diameter of 3 mm, and a sealed gas of xenon, neon, and argon, and has a power consumption of 7.0 to 7.5 W, 7 inches.
- This is a backlight lamp used for a navigation display device.
- FIG. 7 shows that the output voltage and current of the discharge lamp lighting device are adjusted so that the input power supplied to the discharge lamp is constant while changing the frequency of the high-frequency pulse signal of the discharge lamp lighting device.
- 5 is a graph showing the luminance and the lamp current value of the discharge lamp at that time.
- the condition under which the input power supplied to the discharge lamp is constant is a condition required for a backlight device of an electronic device that emphasizes energy saving.
- Fig. 8 shows that the output current of the discharge lamp lighting device is adjusted so that the input voltage supplied to the discharge lamp is constant while changing the frequency of the high frequency pulse signal of the discharge lamp lighting device. It is a graph in which the brightness of the discharge lamp and the power consumption of the lamp at that time were measured.
- the condition under which the input voltage supplied to the discharge lamp is constant is, for example, a condition required for a backlight device for a navigation device mounted on an automobile and driven by a battery of a constant voltage.
- the discharge lamp lighting device of the present invention shows that the outer electrode type dielectric barrier discharge lamp in which the gas pressure of the rare gas in the lamp is 120 torr or more.
- the frequency of the lamp current to be supplied to the lamp within the range of 24 kHz to 34 kHz, the discharge lamp can be operated at high brightness without causing shrinkage of the positive column and therefore without flickering. It is possible.
- the driving frequency of the discharge lamp is set to 24 kHz
- the frequency can be changed to 20 kHz-24 kHz to reduce the dimming even when the low dimming rate is lit. It enables flicker-free and stable lamp lighting.
- the dimming rate used for adjusting the brightness of the discharge lamp is automatically determined, and the flicker of the lamp is easily visible, low, and in the range of the dimming rate. Control the lamp driving frequency to be lower and the lamp driving frequency to be higher in the high dimming rate range where flickering becomes visible. As a result, stable lighting with high brightness and no flicker can be achieved in the entire area of the dimming rate control.
- the discharge lamp lighting device of the present invention includes a dimming signal generation circuit and a pulse width modulated by an output of the dimming signal generation circuit, and a driving signal of a first frequency within a range of 24 kHz and 34 kHz.
- a drive signal switching switch for selectively switching between a drive signal of a first frequency and a drive signal of a second frequency; and a drive signal of the first or second frequency selected by the drive signal switch.
- a switching element connected to the primary winding, and a transformer connected to an outer electrode type dielectric barrier discharge lamp to the secondary winding.
- FIG. 1 is a view showing an example of a conventional fluorescent lamp as an external electrode type dielectric barrier discharge lamp in which a rare gas is filled, (a) is a side view, and (b) is a side sectional view. is there.
- FIG. 2 is a block diagram showing a schematic configuration of a conventional discharge lamp lighting device and an operation thereof, showing a current flow when a semiconductor switching element S2 is turned on.
- FIG. 3 is a block diagram showing a schematic configuration and operation of a conventional discharge lamp lighting device, showing a flow of current when a semiconductor switching element S1 is turned on.
- Garden 4 is a timing chart showing signal waveforms of various parts of a conventional discharge lamp lighting device at a frequency of 20 kHz and a dimming rate of 2%.
- FIG. 5 is a waveform diagram of lamp voltage and current at a frequency of 20 kHz and a dimming rate of 100% in a conventional example.
- FIG. 6 is an enlarged waveform diagram of a portion B1 in FIG.
- FIG. 7 is a graph showing a result of measuring a luminance-frequency characteristic of a conventional external electrode type fluorescent lamp in which a rare gas of 120 torr or more is sealed when input power is kept constant.
- FIG. 8 is a graph showing a result of measuring luminance-frequency characteristics of a conventional external electrode type fluorescent lamp in which a rare gas of 120 torr or more is sealed when an input voltage is kept constant.
- FIG. 9 is a block diagram showing one embodiment of a discharge lamp lighting device of the present invention.
- FIG. 10 is a pulse waveform diagram showing the relationship between the output pulse of the drive signal generation circuit shown in FIG. 9 and the dimming rate.
- FIG. 9 is a waveform diagram of lamp voltage and current observed with an oscilloscope when the driving frequency is 27 kHz and the dimming rate is 100% in the discharge lamp lighting device shown in FIG.
- FIG. 9 is a waveform diagram of lamp voltage and current observed with an oscilloscope when the driving frequency is 20 kHz and the dimming rate is 2% in the discharge lamp lighting device shown in FIG.
- FIG. 9 is a timing chart (reference example) showing signal waveforms at various parts when the driving frequency is 25 kHz and the dimming rate is 2% in the discharge lamp lighting device shown in FIG.
- FIG. 9 is a waveform diagram (reference example) of lamp voltage and current observed with an oscilloscope when the driving frequency is set to 27 kHz and the dimming rate is set to 2% in the discharge lamp lighting device shown in FIG.
- FIG. 17 is an enlarged waveform diagram of A3 part in FIG.
- FIG. 9 is a circuit diagram of a discharge lamp lighting device according to an embodiment of the present invention.
- This discharge lamp lighting device partially has the same configuration as the conventional discharge lamp lighting device shown in FIG. 2 or FIG. That is, transformer T1 2
- An outer electrode type fluorescent lamp 13 having the same structure as the conventional discharge lamp shown in FIG. 1 is connected to the next winding.
- the pressure of the rare gas in the glass tube 1 is 120 torr or more.
- One end of the primary winding of the transformer T1 is connected to a connection point of a pair of capacitors Cl and C2 connected in series.
- the capacitors Cl and C2 connected in series are connected between the power supply Vcc and the ground potential point GND. That is, one end of the primary winding of the transformer T1 is connected to a midpoint potential with respect to a bias voltage between the power supply voltage Vcc and the ground.
- the other end of the primary winding of the transformer T1 is connected to a connection point of a pair of circuit elements Zl and Z2 connected in series.
- Each of the circuit elements Zl and Z2 is composed of an element having a resistance component such as a coil, a diode, and a resistor, or an element group obtained by combining the elements.
- the circuit elements Zl and Z2 connected in series are connected between the power supply Vcc and the ground GND via the semiconductor switching elements Sl and S2, respectively.
- a control circuit 20 is provided for switching control of the semiconductor switching elements Sl and S2.
- the control circuit 20 outputs a drive signal for a higher light rate that outputs a pulse drive signal (3) 14 and a drive signal (4) 15 having a phase different from each other by 180 degrees at a preset frequency in the range of 24 kHz to 34 kHz.
- the circuit 16 is provided.
- the control circuit 20 also outputs a pulse drive signal (1) 11 and a drive signal (2) 12 that are 180 degrees out of phase with each other at a predetermined frequency in the range beyond the audible range of 20 kHz to 23 kHz.
- the control circuit 20 further includes a dimming signal generation circuit 18, and supplies a dimming signal, which is an output of the dimming signal generation circuit 18, to the driving signal circuit 16 for the high dimming rate and the driving signal circuit 17 for the low dimming rate, and generates the same.
- the dimming rate is controlled by pulse width modulation of the generated drive signals (1), (2), (3) and (4).
- This dimming signal is also supplied to the dimming rate determination circuit 19.
- the dimming rate determining circuit 19 determines the dimming rate of the input dimming signal, and the determined dimming rate is a predetermined value, for example, a harmonic rate exceeding 25% or a low dimming efficiency lower than that.
- the signal switching command 21 is output according to the above.
- the signal switching command 21 is supplied to the driving signal switching switches S3 and S4, and drives these driving signal switching switches S3 and S4.
- the drive signal switching switches S3 and S4 selectively supply the output of any one of the drive signal circuit 16 for the high dimming rate and the drive signal circuit 17 for the low dimming rate to the semiconductor switching elements Sl and S2.
- the dimming signal output from the dimming signal generation circuit 18 causes the drive signal circuit 16
- the output of the driving signal circuit 17 for low dimming rate is pulse width modulated, and the modulated driving signal is supplied, so that the dimming rate of the external electrode type fluorescent lamp 13 is continuously between 0-100%. Change.
- FIG. 10 is a pulse waveform diagram showing a relationship between an output pulse of the drive signal generation circuit 17 and a dimming rate. Note that the driving signal generating circuit 16 is also the same in principle, so the driving signal generating circuit 17 will be described below as a representative.
- FIG. 10A is a waveform diagram of the drive signal 11 or 12) when the dimming rate is 100%.
- the repetition frequency of the drive signal 11 is, for example, 20 kHz
- the repetition cycle is 50 ⁇ s.
- 0.01 s (100 Hz in repetition frequency) is set as a unit time for the drive signal 11
- the number of output pulses of the drive signal generation circuit 11 per unit time is 200. That is, at a dimming rate of 100%, the drive signal 11 repeats 200 pulses per unit time at a repetition frequency of 100 Hz.
- FIG. 10B is a waveform diagram of drive signal 11 (or 12) when the dimming rate is 5%.
- the number of output pulses of the drive signal generation circuit 17 is ten per unit time.
- FIG. 10C is a waveform diagram of the drive signal 11 or 12) when the dimming rate is 1%.
- the number of output pulses of the drive signal generation circuit 17 is two per unit time.
- the output signal of the dimming signal generation circuit 18 is an n-digit binary signal, which indicates a dimming rate (%) of 0-100.
- the drive signal generation circuit 17 counts the number of output pulses per unit time specified by the output signal of the dimming signal generation circuit 18 and outputs it by a built-in microcomputer.
- the current dimming ratio is determined from the dimming signal 18 by the dimming ratio determination circuit 19 in FIG. /.
- the drive signal switching switches S3 and S4 are switched to the higher rate drive signal circuit 16 side.
- the semiconductor switching elements Sl and S2 are alternately turned on / off by the drive signal (3) 14 and the drive signal (4) 15 having a frequency set within 24 kHz and 34 kHz.
- a high-frequency current is applied to the primary winding of the transformer T1 in the same operation as the conventional circuit shown in FIGS.
- the lamp current shown in FIGS. 11 and 12 is generated on the secondary winding side, and thereby the external electrode type fluorescent lamp 13 is turned on.
- FIGS. 11 and 12 show actual oscilloscope waveforms when the frequency of the drive signals (3) and (4) is 27 kHz and the dimming rate is 100%. There is a period in which the lamp current does not flow in each of the positive and negative lamp currents during one cycle. The longer this period is, the more difficult it is for flicker to occur.
- the dimming rate is determined from the dimming signal 18 by the dimming rate determination circuit 19, and if the dimming rate is as low as 25% or less, the driving signal is determined by the control circuit 20.
- Switching switches S3 and S4 are switched to the drive signal circuit 17 for low dimming.
- the low dimming drive signal circuit 17 turns on and off the semiconductor switching elements Sl and S2 alternately with the drive signal (1) 11 and the drive signal (2) 12 at a frequency set within 20kHz to 24kHz. I do.
- FIGS. 13 and 14 show actual oscilloscope waveforms when the frequency of the drive signals (1) and (2) is 20 kHz and the dimming rate is 2.0%.
- FIG. 15 is a timing chart (reference example) showing a signal waveform of each part when the driving frequency is 25 kHz and the dimming rate is 2% in the discharge lamp lighting device shown in FIG.
- a setting of a high dimming rate is originally set at a frequency of 25 kHz, and it is not possible to light at such a low dimming rate, but this is shown as a reference example.
- FIG. 4 is a timing chart of a conventional circuit.
- the lamp current is IC IA, ID IB, and the lamp current is small compared to the timing chart of Fig. 4. It becomes a current. It also shows that when the frequency becomes 25 kHz, the period during which no lamp current flows becomes shorter than in the case of the conventional circuit, and a flicker occurs.
- FIGS. 16 and 17 show actual oscilloscope waveforms of lamp driving voltage and current when the frequency is 27 kHz and the dimming rate is 2.0%.
- the case of a frequency of 27 kHz is a setting when the dimming rate is high, and the lighting is not performed at such a low dimming rate, but is shown as a reference example.
- the driving frequency of the discharge lamp in the harmonic lighting mode including 100% is such that noise in the audible range is not generated and the frequency band is not changed.
- the semiconductor switching elements Sl and S2 are driven so that the frequency of the discharge lamp is in a lower frequency band of 20 kHz to 24 kHz.
- the dimming rate is low, the frequency of the lamp current is low, and stable lamp lighting without flicker is possible. Therefore, according to the above-described discharge lamp lighting device, it is possible to perform high-intensity, flicker-free and stable lighting in the entire dimming range of the discharge lamp.
- a half-bridge type high-frequency power supply circuit is employed.
- the type of high-frequency power supply circuit is not particularly important.
- a full-bridge power circuit or a push-pull power circuit can be used.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04745788A EP1635622A1 (en) | 2003-06-13 | 2004-06-11 | Electric discharge lamp operating device |
US10/560,313 US20070090768A1 (en) | 2003-06-13 | 2004-06-11 | Lighting device for a discharge lamp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-169412 | 2003-06-13 | ||
JP2003169412A JP2005005204A (ja) | 2003-06-13 | 2003-06-13 | 放電灯点灯装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004112444A1 true WO2004112444A1 (ja) | 2004-12-23 |
Family
ID=33549367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/008194 WO2004112444A1 (ja) | 2003-06-13 | 2004-06-11 | 放電灯点灯装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070090768A1 (ja) |
EP (1) | EP1635622A1 (ja) |
JP (1) | JP2005005204A (ja) |
WO (1) | WO2004112444A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2020141806A2 (ko) * | 2018-12-31 | 2020-07-09 | 인투코어테크놀로지 주식회사 | 플라즈마 발생 장치 및 그 동작 방법 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10334858A (ja) * | 1997-05-28 | 1998-12-18 | Nec Home Electron Ltd | 希ガス放電灯 |
JPH11167901A (ja) * | 1997-12-05 | 1999-06-22 | Nec Home Electron Ltd | 希ガス放電灯及びその製造方法 |
JP2000040494A (ja) * | 1998-05-21 | 2000-02-08 | Toshiba Lighting & Technology Corp | 放電ランプ、放電ランプ点灯方法、放電ランプ点灯装置および照明装置 |
JP2001243922A (ja) * | 1999-12-21 | 2001-09-07 | Harison Toshiba Lighting Corp | 蛍光ランプおよび放電ランプ |
JP2002043077A (ja) * | 2000-07-26 | 2002-02-08 | Toshiba Lighting & Technology Corp | 放電ランプ点灯装置および光源装置 |
JP2002289390A (ja) * | 2001-01-19 | 2002-10-04 | Harison Toshiba Lighting Corp | 放電灯装置 |
JP2002367792A (ja) * | 2001-06-04 | 2002-12-20 | Harison Toshiba Lighting Corp | 放電ランプ点灯装置および機器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3296284B2 (ja) * | 1998-03-12 | 2002-06-24 | ウシオ電機株式会社 | 誘電体バリア放電ランプ光源装置およびその給電装置 |
JP4190734B2 (ja) * | 2001-01-15 | 2008-12-03 | ウシオ電機株式会社 | 誘電体バリア放電ランプ光源装置 |
JP2002260591A (ja) * | 2001-03-01 | 2002-09-13 | Harison Toshiba Lighting Corp | 外部電極形蛍光ランプ |
JP4293409B2 (ja) * | 2001-05-25 | 2009-07-08 | ウシオ電機株式会社 | 誘電体バリア放電ランプ点灯装置 |
-
2003
- 2003-06-13 JP JP2003169412A patent/JP2005005204A/ja not_active Abandoned
-
2004
- 2004-06-11 WO PCT/JP2004/008194 patent/WO2004112444A1/ja not_active Application Discontinuation
- 2004-06-11 EP EP04745788A patent/EP1635622A1/en not_active Withdrawn
- 2004-06-11 US US10/560,313 patent/US20070090768A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10334858A (ja) * | 1997-05-28 | 1998-12-18 | Nec Home Electron Ltd | 希ガス放電灯 |
JPH11167901A (ja) * | 1997-12-05 | 1999-06-22 | Nec Home Electron Ltd | 希ガス放電灯及びその製造方法 |
JP2000040494A (ja) * | 1998-05-21 | 2000-02-08 | Toshiba Lighting & Technology Corp | 放電ランプ、放電ランプ点灯方法、放電ランプ点灯装置および照明装置 |
JP2001243922A (ja) * | 1999-12-21 | 2001-09-07 | Harison Toshiba Lighting Corp | 蛍光ランプおよび放電ランプ |
JP2002043077A (ja) * | 2000-07-26 | 2002-02-08 | Toshiba Lighting & Technology Corp | 放電ランプ点灯装置および光源装置 |
JP2002289390A (ja) * | 2001-01-19 | 2002-10-04 | Harison Toshiba Lighting Corp | 放電灯装置 |
JP2002367792A (ja) * | 2001-06-04 | 2002-12-20 | Harison Toshiba Lighting Corp | 放電ランプ点灯装置および機器 |
Also Published As
Publication number | Publication date |
---|---|
EP1635622A1 (en) | 2006-03-15 |
JP2005005204A (ja) | 2005-01-06 |
US20070090768A1 (en) | 2007-04-26 |
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