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Lighting apparatus

A technology for lighting devices and high-pressure discharge lamps, which is applied to projection devices, lighting devices, discharge lamps, etc., achieves a simple mechanism, suppresses uneven illumination distribution, and suppresses color unevenness.

Inactive Publication Date: 2010-05-19
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The cooling described in Patent Document 1 cannot sufficiently cool the high-pressure discharge lamp (ultraviolet irradiation lamp), so the technology described in Patent Document 2 has recently been developed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0141] The configuration of the light irradiation device used in the experiment is shown in Figure 9 (a), having and expressing in the above figure 1 The light irradiation device has the same configuration, and its specifications are as follows.

[0142] Discharge tube (light-emitting tube): inner diameter 5.4mm outer diameter 9mm

[0143] ·Outer tube: inner diameter 9.15mm outer diameter 12mm

[0144] ·Distance between electrodes: 500mm

[0145] ·Enclosure

[0146] Mercury density 5mg / cm 3

[0147] The flow rate of cooling water flowing between the water cooling jacket and the outer pipe: 20L / min

[0148] The lighting condition of the high-pressure discharge lamp used in the experiment is to input the stable lighting frequency f1 for 1 second, and then input the frequency f1 and f2 alternately in such a way that the low frequency f2 is input into the 1-cycle component (the opening and closing of the frequency f1 is regarded as 1 cycle). signal of. That is, the stead...

experiment example 2

[0164] The experiment was carried out under the same conditions as in Experimental Example 1 above, changing the light emitting length of the lamp (distance between electrodes) to 1000 mm. Lamp specifications are described below.

[0165] Discharge tube (light-emitting tube): inner diameter 5.4mm outer diameter 9mm

[0166] ·Outer tube: inner diameter 9.15mm outer diameter 12mm

[0167] Lighting length (distance between electrodes): 1000mm

[0168] ·Enclosure

[0169] Mercury density 5mg / cm 3

[0170] The flow rate of cooling water flowing between the water cooling jacket and the outer pipe: 25L / min

[0171] The results are shown in Table 2.

[0172] In this case, the frequency f1 is between 400 Hz and 500 Hz, and it can be seen that the suppression of unevenness in illuminance by acoustic resonance is effective.

[0173] Table 2

[0174]

[0175] (explanation of sign)

experiment example 3

[0177] The same experiment was performed under the same conditions as in Experimental Example 1 above, using a metal halide lamp with the lamp enclosure changed. Lamp specifications are described below.

[0178]Discharge tube (light-emitting tube): inner diameter 4.6mm outer diameter 10.3mm

[0179] ·Outer tube: inner diameter 10.45mm outer diameter 13mm

[0180] Lighting length (distance between electrodes): 500mm

[0181] ·Enclosure

[0182] Mercury density 2.5mg / cm 3

[0183] Iron iodide: 0.45mg / cm 3

[0184] Passive iodide: 0.06mg / cm 3

[0185] The flow rate of cooling water flowing between the water cooling jacket and the outer pipe: 20L / min

[0186] The results are shown in Table 3.

[0187] table 3

[0188]

[0189] (explanation of sign)

◎: Great effect

○: effective

△: some effect

×: almost no effect

[0190] In this case, the frequency f1 is between 1000 Hz and 1200 Hz, and it can be seen that the suppression of uneven...

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Abstract

The present invention relates to a lighting apparatus which is provided with a discharge tube outside an outside tube. The inner diameter of the outer tube is approximately equal with the outer diameter of the discharge tube. In a high-voltage discharge lamp which has an outer tube that contacts with at least one part of the discharge tube, the irradiation nonuniformity generated by the unequal surface temperature is restrained. The high-voltage discharge lamp (10) is composed of the discharge tube (11) and the outer tube (20). The lighting is performed through exerting AC voltage to one pairof electrodes (16) of the high-voltage discharge lamp (10). In lightening, the high-voltage discharge lamp (10) is cooled through circulating cooling water (W) in a cooling water flowpath (65). A power supply part (1) drives a phase inverter with a stable lighting frequency f1 for lighting the lamp (10). Before the irradiation nonuniformity is generated, the lamp (10) can be lighted with a frequency f2 which settles the irradiation nonuniformity and is lower than the frequency. Therefore the density distribution nonuniformity of the cations generated in stable lighting is settled, and a stateof irradiation distribution nonuniformity can be restrained.

Description

technical field [0001] The present invention relates to a lighting device for a high-pressure discharge lamp comprising a discharge tube with both ends sealed, a pair of electrodes disposed opposite to each other, and at least metal enclosed, and an outer tube provided outside the discharge tube. Background technique [0002] For example, in curing treatment of resin such as an adhesive or exposure treatment of a printed circuit board, for example, a high-pressure discharge lamp (ultraviolet irradiation lamp) is used as an ultraviolet light source. [0003] This high-pressure discharge lamp (ultraviolet irradiation lamp) becomes high temperature when the lamp is turned on, and is cooled as described in Patent Document 1. [0004] Patent Document 1 describes a technique in which a water-cooled jacket with a double-tube structure is provided outside a discharge tube (hereinafter referred to as an arc tube in Patent Document 1), and cooling air flows between the arc tube and th...

Claims

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Application Information

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IPC IPC(8): H05B41/24
CPCG03B21/2026H01J5/54H01J61/073H01J61/54H01J61/84
Inventor 鸟饲哲哉森和之
Owner USHIO DENKI KK
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