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Discharge lamp lighting apparatus and luminaire

A technology for lighting devices and lighting devices, applied in lighting devices, electric light sources, electrical components, etc., to achieve the effect of simple structure, suppression of stripes and electrophoresis

Inactive Publication Date: 2006-09-27
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above case, a direct current flows, so there is a problem that so-called electrophoresis occurs.

Method used

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  • Discharge lamp lighting apparatus and luminaire
  • Discharge lamp lighting apparatus and luminaire
  • Discharge lamp lighting apparatus and luminaire

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Embodiment Construction

[0050] Hereinafter, modes for implementing the present invention will be described with reference to the drawings.

[0051] Figure 1 to Figure 4 Showing the first form of the discharge lamp lighting device for carrying out the present invention, figure 1 is the circuit diagram of the device as a whole, figure 2 is the circuit diagram of the driving signal forming circuit, image 3 is a voltage waveform diagram illustrating the formation of asymmetrical drive signals with different duty ratios, Figure 4 It is a voltage and current waveform diagram illustrating alternating asymmetric operation.

[0052] In this embodiment, the discharge lamp lighting device includes a direct current power supply DCS, an inverter circuit INV, a feedback control circuit FCC, a resonant load circuit RLC, and a discharge lamp DL.

[0053] Although detailed illustration is omitted, the DC power supply DCS outputs a DC voltage obtained by rectifying a commercial AC power supply voltage with a b...

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PUM

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Abstract

The invention relates to a discharge tube lighter which restrain pattern and electrophoresis phenomenon, and relative lighter, wherein said lighter comprises: a direct-current power supply (DCS); an inverter circuit (INV) whose input is connected to the direct-current power supply (DSC); said inverter circuit at least comprises a couple of switch elements (Q1, Q2) alternatively switched, to work as following steps when less than preset output: the first period that the dutycycle of one switch element is a (0 H05B 41 / 14 H05B 41 / 26 H05B 41 / 38 9 13 1 2006 / 3 / 23 1838850 2006 / 9 / 27 000000000 Toshiba Lighting & Technology Japan Takahashi Yuji Kato Go Sun Yanbin hu jianxin 72002 NTD Patent & Trademark Agency Ltd. Units 1805-6, 18th Floor, Greenfield Tower, Concordia Plaza, No.1 Science Museum Road, Tsimshatsui, east, Kowloon, Hong Kong 100045 Japan 2005 / 3 / 24 085995 / 2005 Japan 2005 / 6 / 24 184285 / 2005 Japan 2006 / 1 / 26 017272 / 2006

Description

technical field [0001] The present invention relates to a discharge lamp lighting device having an inverter circuit including at least a pair of switching elements that switch alternately, and a lighting device having the device. Background technique [0002] A technique for preventing streaks is known by operating a pair of switching elements of a half-bridge inverter circuit with an asymmetrical duty ratio (see Patent Document 1). According to Patent Document 1, by making the duty ratio asymmetrical, direct current flows through the discharge lamp, and the streaks are suppressed to such an extent that the human eye cannot recognize them. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 06-283286 [0004] However, since a direct current flows in the above-mentioned case, there is a problem that a so-called electrophoresis phenomenon occurs. Contents of the invention [0005] An object of the present invention is to provide a lighting device for a di...

Claims

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Application Information

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IPC IPC(8): H05B41/14H05B41/26H05B41/38
Inventor 高桥雄治加藤刚孙彦斌
Owner TOSHIBA LIGHTING & TECH CORP