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lighting device

A technology for lighting devices and light-emitting elements, which is applied to lighting devices, lamp circuit layout, local circuits, etc., can solve problems such as increased power loss and poor efficiency, and achieve the effects of reducing flicker and improving convenience

Active Publication Date: 2019-03-15
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the conventional lighting LED drive circuit continues to be in dim mode for a long time such as at night, the efficiency will deteriorate and the power loss will increase.

Method used

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Experimental program
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Embodiment Construction

[0022] Next, use Figure 1 to Figure 6 Preferred embodiments of the lighting device according to the present invention will be described in detail.

[0023] The lighting device 100 of the present invention includes: a light emitting element 52; a power supply unit 40 that supplies power to the light emitting element 52; The brightness of the light-emitting element 52 can be controlled hierarchically, wherein the control unit 62 can control the brightness of the light-emitting element 52 at least in such a manner that the light-emitting element 52 operates in the first dimming mode and the second dimming mode. Next, the light-emitting element 52 is adjusted from the first lighting state with the brightest brightness of the light-emitting element 52 to a second lighting state darker than the first lighting state, and in the second dimming mode, the light-emitting element 52 is changed from The third lighting state darker than the second lighting state is adjusted to a fourth li...

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Abstract

The invention provides an illuminating device which has advantages of suppressing a cost through no specialized light source in a second dimming mode, easily determining switching from a first dimming mode to a second dimming mode, and improving convenience and use feeling of a user. The illuminating device is provided with the components of a light emitting element; a power supply part which supplies electric power to the light emitting element; and a control part which controls electric power supplied from the power supply part to the light emitting element and performs controlling for changing the brightness of the light emitting element is a graded manner. The control part at least controls the brightness of the light emitting element in a manner that the light emitting element is activated in the first dimming mode and the second dimming mode. Furthermore, on condition that a lighting state which is brighter than a second lighting stte in a first dimming mode and has a nearest brightness with the second lighting state is set to a fifth lighting state, a first brightness difference between the second lighting state and a third lighting state is larger than that between the fifth lighting state and the second lighting state.

Description

technical field [0001] The invention relates to a lighting device using a light emitting element. Background technique [0002] Conventional LED (Light Emitting Element) drive circuits for lighting use various means to achieve high efficiency in the normal lighting mode. In addition, if the conventional lighting LED drive circuit continues to be in the dim light mode for a long time such as at night, the efficiency deteriorates and the power loss increases. Therefore, in order to reduce the power loss in the dim mode, various LED driving circuits and LED lighting devices using the LED driving circuits have been proposed. Here, the dimmer mode refers to a mode in which the LED is driven with a current smaller than that in the normal lighting mode. [0003] The lighting device of Patent Document 1 includes: a load unit including a plurality of light-emitting elements; a power supply unit that supplies power to the plurality of light-emitting elements; a power supply control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L23/00H05B37/02
Inventor 密岛康一万波宽明秋月徹人
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD