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Power supply unit and lighting unit

A technology of power supply device and input power, which is applied in lighting devices, electric light sources, electroluminescent light sources, etc., and can solve problems such as user incoordination

Inactive Publication Date: 2017-09-08
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in a conventional power supply device, when the LED element is turned on with a light output of a certain degree of dimming, if a dimming signal corresponding to the deepest degree of dimming at which the LED element is turned off is input, the LED element will change from the previous state. The lighting state of the dimming degree is turned off instantly, which brings a sense of incongruity to the users in the lighting space

Method used

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  • Power supply unit and lighting unit
  • Power supply unit and lighting unit
  • Power supply unit and lighting unit

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Embodiment Construction

[0017] Below, refer to figure 1 , and the first embodiment will be described.

[0018] The power supply device 10 is connected to an AC power supply E that is a commercial AC power supply, and supplies DC power to one or a plurality of LED elements 11 as light emitting elements to light the LED elements 11 . The power supply device 10 is applicable to, for example, a lighting device A using the LED element 11 such as a ceiling light, a base light, and a down light.

[0019] The power supply device 10 includes: an input unit 12 connected to the AC power supply E, an output unit 13 connected to the LED element 11, a filter circuit (not shown) connected to the input unit 12, a rectifier circuit 14 connected to the filter circuit, a connection The power factor improvement circuit 15 on the output side of the rectifier circuit 14, the DC output generating mechanism 16 connected between the output side of the power factor improvement circuit 15 and the output part 13, that is, the ...

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Abstract

The present invention provides a power supply device and a lighting device capable of turning off an LED element that is in a lighting state with a light output of a certain degree of dimming, or lighting it up with a light output of a certain degree of dimming from the light-off state. Get the show effect. The control part (21) performs constant current control through the constant current control mechanism (19) in the dimming degree region shallower than the preset dimming degree, and through constant current control in the dimming degree deeper than the preset dimming degree region. The voltage control mechanism (20) performs constant voltage control. When the dimming signal corresponding to the deepest dimming degree of the LED element (11) is input in the lighting state of the LED element (11), the control part (21) gradually lowers the dimming degree of the LED element (11) from the previous dimming degree. Light is output and the LED element (11) is extinguished.

Description

technical field [0001] The present invention relates to a power supply device and a lighting device for lighting a light-emitting element. Background technique [0002] Conventionally, a power supply device for lighting an LED element as a light emitting element has a dimming function of inputting a dimming signal of a predetermined dimming degree from the outside and adjusting the light output of the LED according to the dimming degree. [0003] Such a power supply device having a dimming function includes a constant current control mechanism that controls the current flowing to the LED element to be constant, and a constant voltage control mechanism that controls the load voltage applied to the LED element to be constant. Also, in this power supply device, switching between constant current control and constant voltage control or changing the ratio of the above control is performed according to the degree of dimming so that the light output of the LED element is large in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/14Y02B20/30H05B45/38H05B45/395H05B45/375
Inventor 松本晋一郎高桥浩司工藤启之
Owner TOSHIBA LIGHTING & TECH CORP