Device for operating a short arc type hid lamp

A lighting device and technology for discharge lamps, which are applied to discharge lamps, high-pressure discharge lamps, gas discharge lamps, etc., can solve problems such as damage to discharge vessels, decrease in light output, and influence on the service life of lamps, and achieve the effect of inhibiting blackening.

Inactive Publication Date: 2006-06-21
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This blackening of the tube wall can lead to a decrease in light output, or in severe cases, it can also become a cause of damage to the discharge vessel, which affects the service life of the lamp.

Method used

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  • Device for operating a short arc type hid lamp
  • Device for operating a short arc type hid lamp
  • Device for operating a short arc type hid lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 The schematic structure of the short-arc type discharge lamp lighting device of this invention is shown.

[0032] The lighting device 100 includes a discharge lamp 10 and a power supply device 20 , and the power supply device 20 is composed of a switch unit 101 , a full bridge unit 102 , and a control unit 103 .

[0033] The discharge lamp 10 is connected in series to the ignition transformer TR1, and a capacitor C3 is also connected in parallel to the series circuit of the discharge lamp 10 and the transformer TR1.

[0034] The power supply device 20 supplies a direct current to the discharge lamp 10 at the time of lighting start, and supplies an alternating current at the time of stabilization.

[0035] The switch unit 101 is connected to the DC power supply E through terminals T1 and T2, and is composed of a capacitor C1, a switching element S1, a diode D1, an inductor L1, and a sliding capacitor C2. The switching element S1 is controlled by the control un...

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PUM

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Abstract

The invention provides a lighting device for a short-arc discharge lamp, which can judge whether the discharge lamp is started in a hot state or in a cold state, and performs proper lighting. A lighting device for a short-arc discharge lamp comprising a short-arc discharge lamp (10) and a power supply device (20) for supplying a direct current at the start of lighting and then for supplying an alternating current, wherein the power supply device (20) supplies the discharge lamp The DC current of (10) is initially a current (I1) smaller than the rated current, and then a current (I2) larger than the rated current. The power supply device (20) detects whether the lighting state of the discharge lamp (10) is hot or cold. The lighting state is started, and the current value and / or supply time of the current (I2) are adjusted corresponding to each lighting state according to the detection result.

Description

technical field [0001] The present invention relates to a short-arc discharge lamp lighting device. In particular, it relates to a short-arc discharge lamp lighting device used in rear projection devices such as a liquid crystal display device and a DLP (Digital Light Source Processor) using a DMD (Digital Micromirror Device). Background technique [0002] A projection type projection apparatus requires a rectangular projection screen to have uniform and sufficient color reproduction and to illuminate an image. Therefore, the light source usually uses a discharge lamp with a relatively high mercury vapor pressure, such as 150 atmospheres. Because by increasing the mercury vapor pressure, it is possible to suppress (shrink) the arc spread and further increase the light output. [0003] Such discharge lamps are disclosed, for example, in Japanese Patent Application Laid-Open No. 2-148561, Japanese Patent Laid-Open No. 6-52830, and Japanese Patent No. 2980882. [0004] The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/282H01J61/00H01J61/88H02M7/48H04N5/74H05B41/24H05B41/288
CPCH05B41/2885H05B41/2887H05B41/2928Y02B20/00
Inventor 铃木义一有本智良菅谷胜美
Owner USHIO DENKI KK
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