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Power supply device for discharge lamp

A technology for power supply devices and discharge lamps, applied in lighting devices, electric light sources, electrical components, etc., can solve problems such as difficulty in maintaining discharge lamp lighting, and achieve the effect of low current value

Active Publication Date: 2011-09-21
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because if the power value is set too low, it will be difficult to maintain the lighting of the discharge lamp

Method used

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  • Power supply device for discharge lamp
  • Power supply device for discharge lamp
  • Power supply device for discharge lamp

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0069] use Figure 1 ~ Figure 3 The first embodiment of the present invention will be described.

[0070] figure 1 It is a figure which shows the structure of the power supply device for discharge lamps of this embodiment.

[0071] As shown in the figure, in this electric power supply device for a discharge lamp, the current supplied from a commercial power supply 1 is rectified and smoothed by a rectifying and smoothing circuit 3 composed of a full-wave rectifying circuit 2 and a capacitor C1. The DC voltage obtained by the rectification and smoothing circuit 3 is supplied to a full-bridge switching circuit 4 composed of switching elements Tr1 to Tr4 . The bases of the switching elements Tr1 to Tr4 of the switching circuit 4 are connected to the output of the PWM control unit 5 , and the switching elements Tr1 to Tr4 are turned on / off by the output of the PWM control unit 5 to generate a high frequency output from the switching circuit 4 . The output of the switching circu...

no. 2 Embodiment approach

[0094] Next, use Figure 4 and Figure 5 A second embodiment of the present invention will be described.

[0095] Figure 4 It is a figure which shows the structure of the power supply device for discharge lamps of this embodiment.

[0096] As shown in the figure, the power supply device for the discharge lamp of the present embodiment and figure 1 Compared with the described power supply device for a discharge lamp, there is the following difference: instead of inputting the output from the voltage detection unit 9 to the reference power conversion unit 18, the output from the current detection unit 10 is input to the reference power conversion unit 18, In the energy-saving lighting mode, the lamp current is detected, and when the lamp current decreases, the reference power value is increased. Additionally, other constructs with figure 1 The ones shown correspond to the structures of the symbols, and therefore explanations are omitted.

[0097] Figure 5 It is a flow c...

no. 3 Embodiment approach

[0100] Next, use Figure 6 and Figure 7 A third embodiment of the present invention will be described.

[0101] Figure 6 It is a figure which shows the structure of the power supply device for discharge lamps of this embodiment.

[0102] As shown in the figure, the power supply device for the discharge lamp of the present embodiment and figure 1 Compared with the described power supply device for a discharge lamp, there is the following difference: instead of inputting the output from the voltage detection unit 9 to the reference power conversion unit, the output from the lamp cumulative lighting time measurement unit 19 is input to the reference power conversion unit 18. The unit 18 detects the cumulative lamp lighting time obtained by adding the full lighting time and the energy-saving lighting time in the energy-saving lighting mode, and raises the reference power value as the cumulative lamp lighting time elapses. Additionally, other constructs with figure 1 The one...

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PUM

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Abstract

The invention discloses a power supply device for a discharge lamp. In the power supply device for the discharge lamp used in an ultraviolet irradiation device, the irradiation process is not carried out. In the event of keeping light of the discharge lamp , the lighting power can be reduced unlimitedly according to the electricity-saving viewpoint. The power supply device for the discharge lamp can be driven to be converted between a full-light lighting mode and an energy-saving lighting mode. The full-light lighting mode is that the discharge lamp is turned on through constant power control in a way of keeping a rated power value. The energy-saving lighting mode is that the discharge lamp is turned on through constant power control in a way of keeping a power value which is less than 50% of the rated power value. Wherein the energy-saving lighting mode sets an energy-saving lighting reference power value based on the lowest current value capable of keeping light of the discharge lamp; and the energy-saving lighting reference power value rises along with the physical change of the discharge lamp.

Description

technical field [0001] The present invention relates to a power supply device for a discharge lamp that controls a discharge lamp with a constant power, and in particular to a normal lighting mode for lighting a discharge lamp at a rated power value, and an energy-saving lighting mode for lighting a discharge lamp with a power value less than 50% of the rated power value power supply for discharge lamps. Background technique [0002] Conventionally, there has been a use of irradiating ultraviolet rays emitted from a discharge lamp to adhesives, inks, resists, and the like to be cured or dried as processed objects (Patent Document 1). In such ultraviolet irradiation treatment, the discharge lamp is actually turned on at a predetermined rated power value during the irradiation treatment, but is turned on at a reduced power level in a sleep state without irradiation treatment. [0003] This is because once the discharge lamp is turned off, it takes time to turn on the lamp aga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/26H05B41/36
CPCG05F1/66H05B41/36H05B41/42
Inventor 山口义之
Owner USHIO DENKI KK