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Power Supply Device And Lighting Device

A power supply device and current technology, which is applied in the direction of lighting devices, electric light sources, lamp circuit layout, etc., to achieve the effect of suppressing noise

Active Publication Date: 2015-08-26
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to suppress the generation of noise without adding components

Method used

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  • Power Supply Device And Lighting Device
  • Power Supply Device And Lighting Device
  • Power Supply Device And Lighting Device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0026] [Structure of lighting device 1]

[0027] figure 1 It is a perspective view showing an example of the lighting device 1 according to the embodiment. The lighting device 1 is, for example, a ceiling light, and includes a device main body 10 and a shade 11 covering the entire lower surface of the device main body 10 . A substrate on which a light source having a plurality of light emitting elements is arranged is provided on the lower surface of the device main body 10 . The light sources are divided into 6 groups, for example, and the lighting, extinguishing and dimming can be controlled individually for each group.

[0028] A substrate on which electric components for supplying power to the light source are mounted is connected to the back side of the substrate on which the light source is provided, via a cable or the like. The light source emits light according to electric power supplied via the cable. The globe 11 is formed of a translucent resin material or the l...

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Abstract

The present invention provides a power supply device and a lighting device which can restrain the noise generation without needing to add the elements. A second power supply device 20 of the present invention operates in a current discontinuous mode, and reduces the voltage value of a voltage outputted from a first power supply device 13 to a light source 30, and the second power supply device 20 is at least equipped with an inductor 23, a switch element 24 for supplying the energy from the first power supply device 13 to the inductor 23 by a conduction operation, and supplying the energy from the first power supply device 13 to the inductor by the cut-off operation, and releasing the energy accumulated in the inductor; a control part 14 for controlling the switch element 24. The control part controls the switch element to be cut off from being conducted, during the free vibration period of a current flowing through the inductor, and during the period that the polarity of the current flowing through the inductor is switched one time to three times, the switch element is controlled to be conducted from being cut off.

Description

technical field [0001] Embodiments of the present invention relate to a power supply device and a lighting device. Background technique [0002] When a step-down switching converter is used to drive a load such as an LED (Light Emitting Diode, light emitting diode), the switching converter sometimes operates in a current discontinuous mode. When the switching converter is operated in the current discontinuous mode, after the energy stored in the inductor is released, free vibration occurs in which the polarity of the current flowing through the inductor is switched multiple times. When the polarity of the current flowing through the inductor switches, electrical noise is generated. In order to suppress the generation of noise, it is necessary to add noise countermeasure components such as inductors and capacitors, which is a major cause of device size and cost increase. [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2013-229234 Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 岩井直子
Owner TOSHIBA LIGHTING & TECH CORP
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