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led linear regulation circuit with improved power factor

A technology of linear regulation and circuit, applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., can solve the problems of insufficient total light output, inefficiency to reduce performance, low flicker noise, etc.

Active Publication Date: 2016-12-28
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional LED linear regulators often have drawbacks regarding insufficient total light output, flicker noise and / or low power factor
These defects lead to inefficiency and reduced performance of conventional LED linear regulators
[0006] Thus, while existing LED linear regulators are often adequate for their intended purpose, they do not meet the requirements in every respect

Method used

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  • led linear regulation circuit with improved power factor
  • led linear regulation circuit with improved power factor
  • led linear regulation circuit with improved power factor

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Embodiment Construction

[0035] It should be understood that the following summary provides a number of different embodiments, or examples, for implementing different features of the various embodiments. Specific examples of components and arrangements are described below to simplify the present disclosure. Of course, these are examples only and are not intended to be limiting. For example, in the following description, forming a first component over or on a second component may include embodiments in which the first component and the second component are formed in direct contact, and may also include embodiments in which the first component and the second component may be formed An embodiment in which an additional part is formed therebetween so that the first part and the second part may not be in direct contact. Also, the terms "top," "bottom," "below," "above," etc. are used for ease of description and are not intended to limit the scope of the embodiments to any particular orientation. Various ...

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PUM

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Abstract

The invention relates to a device. The device includes a rectifier connected to receive energy from an alternating current (AC) voltage source. The capacitor is connected to the rectifier. Multiple LEDs and current limiters are connected in series. The current limiter is configured to limit the current through the LED. Multiple LEDs and current limiters are commonly connected to the capacitor in parallel. A current controller is connected in series to the capacitor and the current limiter. The current controller is configured to control at least a charging current of the capacitor. The device has a first current path during a first operating cycle and a second current path during a second operating cycle. The capacitor is charged during the first operating cycle and discharged during the second operating cycle. The invention also provides an LED linear regulation circuit with improved power factor.

Description

[0001] priority data [0002] This application is U.S. Provisional Patent Application No. 61 / 778,043, entitled "LED LINEARREGULATOR CIRCUIT WITH IMPROVED POWER FACTOR," (Attorney Docket 48047.133), filed March 12, 2013, the entire contents of which are hereby incorporated by reference . technical field [0003] The present invention relates generally to light emitting devices and, more particularly, to light emitting diode (LED) linear regulation circuits with improved power factor. Background technique [0004] An LED device or LED as used herein is a semiconductor light source for generating light of a specified wavelength or range of specified wavelengths. LEDs are becoming increasingly popular due to favorable features such as small device size, long lifetime, effective power consumption, and good durability and reliability. In recent years, LEDs have been deployed in a variety of applications, including indicators, light sensors, traffic lights, broadband data transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 张铭顺邱科智
Owner EPISTAR CORP