Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
  • H05B41/14—Circuit arrangements
  • 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
• • 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
  • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency AC, or with separate oscillator frequency
• • 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
  • H05B41/02—Details
  • H05B41/04—Starting switches
  • H05B41/042—Starting switches using semiconductor devices
• • 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
  • H05B41/16—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies
  • H05B41/18—Circuit arrangements in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC, or with network frequencies having a starting switch
• • 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
  • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp

Definitions

• the present invention relates to a high pressure discharge lamp lighting device, and more particularly to a high pressure discharge lamp lighting device including a start pulse generating circuit capable of extending an output wiring length.
• FIG. 7 is a block diagram showing a conventional high pressure discharge lamp lighting device.
• the control power source circuit 10 when the commercial power source 1 is turned on, the control power source circuit 10 generates the control power source, the control circuit 9 operates, and the step-up inverter 3, the step-down inverter 4, the rectangular wave circuit 6, the start pulse A control signal is sent to generation circuit 7, and each starts operation.
• the step-up inverter 3 boosts the output rectified by the rectifier circuit 2 to a specified voltage, and the step-down inverter 4 adjusts the output so that the current flowing through the high-pressure discharge lamp 8 becomes a specified current.
• the rectangular wave circuit 6 outputs an AC rectangular wave voltage having a specified frequency to the high-pressure discharge lamp 8.
• the start pulse generation circuit 7 generates a high pressure pulse to start the high pressure discharge lamp 8.
• FIG. 8 is a detailed diagram of the start pulse generation circuit 7.
• the start pulse generation circuit 7 operates only when the high pressure discharge lamp 8 is started, and generates a high pressure pulse.
• the start pulse generation circuit 7 is a direct current boosted by the boost inverter 3 by rectifying the AC voltage of the transformer T1, the FET (field effect transistor) that can be turned on and off by an external control signal, and the commercial power supply 1 It has a capacitor Cl charged with voltage Vcc, an inductance L1 that protects the FET from overcurrent, and a capacitor C2 that blocks high voltage pulses generated by the transformer T1 from entering the rectangular wave circuit 6.
• Patent Document 1 Japanese Patent Laid-Open No. 11-307285
• Patent Document 2 Japanese Patent Laid-Open No. 2000-306688
• Patent Document 3 Japanese Patent Laid-Open No. 2002-75673
• a high-pressure discharge lamp such as a high-intensity high-pressure discharge lamp has a starting pulse voltage of 3 to 5 kVp. It is prescribed. In the high-pressure discharge lamp lighting device, if the output wiring length becomes longer, the starting pulse voltage attenuates due to the increase in output capacity.
• the output wiring length of the high-pressure discharge lamp lighting device has a regulation of 2 m or less, which is a construction restriction (see Fig. 9).
• a high-pressure discharge lamp lighting device that outputs a starting pulse voltage of 4 kVp at an output wiring length of 10 m may be used.
• this high-pressure discharge lamp lighting device is used at 2 m or less, the starting pulse voltage will be 5.6 kVp or more.
• the present invention has been made to solve the above-described problems. Even if the output wiring length is increased and the output capacity is increased by feeding back the starting pulse voltage and keeping it constant.
• An object of the present invention is to provide a high pressure discharge lamp lighting device capable of maintaining the starting pulse voltage within a specified value.
• a high pressure discharge lamp lighting device includes a high pressure discharge lamp, a start pulse generating circuit for supplying a high voltage for starting to the high pressure discharge lamp, and a control circuit for controlling the start pulse generating circuit.
• a start pulse generating circuit for supplying a high voltage for starting to the high pressure discharge lamp
• a control circuit for controlling the start pulse generating circuit.
• the starting pulse generating circuit is
• a voltage dividing circuit that divides a voltage generated in the feedback voltage detection winding; and a pulse detection circuit that detects a starting pulse voltage component from an output of the voltage dividing circuit and feeds back to the control circuit, and Is characterized in that the voltage after boosting the transformer is maintained at a predetermined value.
• the high pressure discharge lamp lighting device can maintain the starting pulse voltage within a specified value even when the output wiring length increases and the output capacity increases.
• FIG. 1 is a diagram illustrating the first embodiment, and shows the output power of the start pulse generation circuit when the output wiring length is changed. It is a pressure measurement figure.
• FIG. 2 shows the first embodiment, and shows the measurement result of the starting pulse voltage when the wiring length is changed.
• FIG. 3 shows the first embodiment, and shows the measurement result of the starting pulse voltage when the wiring length is changed.
• FIG. 4 shows the first embodiment, and shows the measurement results of the FET voltage V (C) and the starting pulse voltage V (B) when the wiring length is changed.
• FIG. 5 shows the first embodiment, and shows the measurement results of the FET voltage V (C) and the starting pulse voltage V (B) when the wiring length is changed.
• FIG. 6 shows the first embodiment, and is a detailed diagram of a start pulse generating circuit.
• FIG. 7 is a block diagram showing a conventional high pressure discharge lamp lighting device.
• FIG. 8 is a detailed view of a conventional starting pulse generation circuit 7.
• FIG. 9 is a diagram showing the relationship between the output wiring length and the starting pulse voltage of a conventional high pressure discharge lamp lighting device.
• Figs. 1 to 6 are diagrams showing the first embodiment
• Fig. 1 is an output voltage measurement diagram of the start pulse generation circuit 7 when the output wiring length is changed
• Figs. 2 and 3 are start pulse voltages when the wiring length is changed.
• Figures 4 and 5 show the measurement results of FET (field effect transistor) voltage V (C) and starting pulse voltage V (B) when the wiring length is changed
• Figure 6 shows the measurement results.
• 3 is a detailed view of a start pulse generation circuit 7.
• FIG. 1 is an output voltage measurement diagram of the start pulse generation circuit 7 when the output wiring length is changed
• Figs. 2 and 3 are start pulse voltages when the wiring length is changed
• Figures 4 and 5 show the measurement results of FET (field effect transistor) voltage V (C) and starting pulse voltage V (B) when the wiring length is changed
• Figure 6 shows the measurement results.
• 3 is a detailed view of a start pulse generation circuit 7.
• FIG. 1 is an output voltage measurement diagram of the start pulse generation circuit 7 when the output wiring
• the overall configuration of the high pressure discharge lamp lighting device is the same as that of the conventional one, and the start pulse generating circuit 7 is characterized by this embodiment.
• the output wiring length is increased, the starting pulse voltage value is decreased and increased. If the starting voltage of the pressure discharge lamp is lowered, the high pressure discharge lamp may not start and a malfunction may occur.
• the output wiring length is specified to 2 m or less. High pressure discharge lamps start at 3.5kVp, and do not start at OkVp.
• the output voltage from the starting pulse generator 7 at points A and B in Fig. 1 should be approximately equal. For example, if the voltage at point A is 5 kVp and the voltage at point B is 3 kVp, the output voltage of the start pulse generator circuit (almost the voltage at point A) cannot be fed back.
• the starting pulse voltage is as high as 3 to 5 kVp, and it is necessary to use many high-voltage components, resulting in an increase in size. Even if high-voltage components are mounted, there is a loss during normal lighting.
• the voltage to be fed back is about lOVp.
• the starting pulse voltage V (A) and the starting pulse voltage V (B) at points A and B in FIG. 1 in the above item (1) were measured while changing the output wiring length.
• the wiring used in the experiment is a WF cable. Yanagi's results are shown in Figs. Output self-service line length 0, 0. 5, 1, 2, 4, 6, 8, 10m [In this case, the starting pulse voltage V (A) and starting pulse voltage V (B) at points A and B were measured. . As shown in Figs. 2 and 3, it was confirmed that the starting pulse voltage V (A) and starting pulse voltage V (B) at points A and B were almost equal regardless of the output wiring length. Therefore, for example, if the starting pulse voltage V (A) is controlled to 4 kVp, the starting pulse voltage V (B) can be controlled to almost 4 kVp.
• the FET voltage V (C) and the start pulse voltage V (A) have a correlation, and by controlling the low voltage FET voltage V (C), start Pulse voltage V (A) can be controlled. I understood that.
• the FET voltage V (C) is 1Z 10 or less of the starting pulse voltage V (A). If the voltage is 1Z10 or less of the starting pulse voltage V (A), it can be created with a small circuit.
• the FET voltage V (C) is larger than the desired lOVp for feedback, but if it is about 300 Vp, a feedback circuit can be configured with a few circuit components.
• the starting norse generation circuit 7 of the present embodiment will be described.
• primary winding N1 is 6 turns
• secondary winding N2 is 88 turns
• feedback voltage detection winding N3 is 1 turn
• FET voltage V (C) 300Vp
• the voltage divider circuit 11 is connected to the feedback voltage detection wire N3.
• the voltage dividing circuit 11 is constituted by a resistor, for example, and divides it into an arbitrary voltage.
• the feedback voltage can also be lowered to about the preferred lOVp.
• the voltage divider circuit 11 is connected to the pulse detector circuit 12.
• the output of the voltage dividing circuit 11 includes various voltage components in addition to the necessary starting pulse voltage component. Of these, the pulse detection circuit 12 detects the starting pulse voltage component.
• the control circuit 9 controls the FET voltage V (C) so that the starting pulse voltage V (A) is constant, for example, 4 kVp.
• the low voltage (eg, 50 Vp) of the feedback voltage winding N 3 provided in the transformer T1 is further divided and reduced by the voltage divider circuit 11 to Since the required start pulse voltage component is detected by the pulse detection circuit 12 and fed back to the control circuit 9, the start pulse voltage V (A) can be maintained at 4 kVp, for example. Up to about 10 m of output wiring length, it has been confirmed that the starting pulse voltage is almost the same regardless of the output wiring length, so if the starting pulse voltage V (A) is maintained at 4 kVp, the output wiring length The starting pulse voltage 10m ahead can be maintained at almost the same voltage value.

Landscapes

• Circuit Arrangements For Discharge Lamps (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37757441

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (7)

Citations (8)

Family Cites Families (6)

• 2005
  • 2005-08-17 JP JP2005236379A patent/JP4759105B2/ja not_active Expired - Fee Related
• 2006
  • 2006-07-25 AU AU2006280899A patent/AU2006280899B2/en not_active Ceased
  • 2006-07-25 EP EP20060781598 patent/EP1916882B1/en not_active Not-in-force
  • 2006-07-25 WO PCT/JP2006/314686 patent/WO2007020776A1/ja not_active Ceased
  • 2006-07-25 CN CN2006800299426A patent/CN101243729B/zh not_active Expired - Fee Related
  • 2006-07-25 KR KR1020087006305A patent/KR101226179B1/ko not_active Expired - Fee Related

Patent Citations (8)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events