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LED driving device, lighting device, and control circuit for LED driving device

A technology for LED driving and lighting devices, applied in lighting devices, lamp circuit layout, electric light sources, etc.

Inactive Publication Date: 2015-05-20
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A rectifier rectifies an alternating current (AC) voltage to generate a first voltage

Method used

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  • LED driving device, lighting device, and control circuit for LED driving device
  • LED driving device, lighting device, and control circuit for LED driving device
  • LED driving device, lighting device, and control circuit for LED driving device

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Embodiment Construction

[0052] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0053] This disclosure may, however, be illustrated in many different forms and should not be construed as limited to the specific exemplary embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0054] In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements.

[0055] figure 1 is a block diagram schematically showing a lighting device according to an exemplary embodiment of the present disclosure.

[0056] refer to figure 1 , the lighting device 10 includes an alternating current (AC) power source 11 , a dimmer 12 , a transformer 13 , a light emitting di...

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Abstract

A light emitting diode (LED) driving device includes a rectifier, a voltage converter, a variable impedance unit, and a controller. The rectifier rectifies an alternating current (AC) voltage to generate a first voltage. The voltage converter generates a second voltage for driving a plurality of LEDs from the first voltage. The variable impedance unit is connected to an input terminal of the rectifier. The controller adjusts impedance of the variable impedance unit based on at least one of the first and second voltages.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2013-0138541 filed in the Korean Intellectual Property Office on Nov. 14, 2013, the disclosure of which is incorporated herein by reference. technical field [0003] The present disclosure relates to a light emitting diode (LED) driving device, a lighting device and a control circuit for the LED driving device. Background technique [0004] Light emitting diodes (LEDs) are widely used as light sources due to various advantages they exhibit, such as low power consumption, high brightness, and the like. In particular, light emitting devices are used as backlights in lighting fixtures and large liquid crystal displays (LCDs). In many cases, light emitting devices are provided in the form of packages configured for easy installation in various apparatus such as lighting jacks, lighting fixtures, and lighting devices. As LEDs are increasingly being us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/39H05B45/375H05B45/3725H05B45/38H05B45/12H05B45/10H05B45/37
Inventor 李奉振康规喆
Owner SAMSUNG ELECTRONICS CO LTD
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