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Non-flickering AC light-emitting diode lighting system and control method

A light-emitting diode and lighting system technology, which is applied in the field of light-emitting diode lighting systems and control, and can solve problems such as feeling uncomfortable

Active Publication Date: 2018-09-07
ANALOG INTEGRATIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even though the strobe may not be perceptible to the human eye, there have been reports of people feeling dizzy or feeling sick when viewing objects illuminated by LED lighting systems 15

Method used

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  • Non-flickering AC light-emitting diode lighting system and control method
  • Non-flickering AC light-emitting diode lighting system and control method
  • Non-flickering AC light-emitting diode lighting system and control method

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Embodiment Construction

[0070] The embodiments of the invention disclosed below are sufficiently disclosed to enable those skilled in the art to which the invention pertains to practice the invention. Various simple combinations and changes made to the various embodiments disclosed in the present invention should still be regarded as embodiments of the present invention.

[0071] In the following specification, specific examples of various embodiments of the invention will be disclosed. However, these special examples are not the only way to implement the present invention. In order to make the description of the present invention concise and easy to understand, some embodiments that can be easily transferred by those skilled in the art of the present invention will not be repeated.

[0072] Please refer to Figure 4 , Figure 4 It is a circuit diagram of an AC LED lighting system 100 according to an embodiment of the present invention. The AC LED lighting system 100 has a full-wave rectifier 18 f...

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Abstract

The invention discloses a light-emitting diode lighting system and a control method driven by alternating current without flickering. The light-emitting diode lighting system has a rectifier, a string of light-emitting diodes, a mobile power supply and a controller. The rectifier receives an AC input voltage to generate a rectified voltage on the input power line and a ground voltage on the ground line. The LED string includes a plurality of LEDs connected in series and has a main anode and a main cathode. The main anode is coupled to the input power line. The mobile power supply is connected to the input power line and the main cathode. The controller guides the first driving current from the main cathode to the ground wire, and guides the second driving current from the mobile power supply to the ground wire. The second driving current increases the stored electric energy of the mobile power supply. Both the first and second driving currents flow through the LED strings. When the AC input voltage is about zero volts, the mobile power supply releases electric energy to make at least one LED emit light.

Description

technical field [0001] The present invention relates to a light-emitting diode (Light-Emitting Diode; LED) lighting system, in particular to a light-emitting diode lighting system and a control method driven by alternating current without causing flicker. Background technique [0002] Light-emitting diodes (Light-Emitting Diodes; LEDs) are being used for general lighting purposes at a very fast speed. In one use case, an assembly consisting of multiple LEDs is powered by an AC power source, and the term "AC LED" is sometimes used to describe such a circuit. For the AC LED lighting system, the concerned parts include its manufacturing cost, power efficiency, power factor, flicker and service life...etc. [0003] Please refer to figure 1 , figure 1 It is a circuit diagram of an AC LED lighting system 10 in the prior art. The AC LED lighting system 10 simply includes a LED module 12 and a current limiting resistor 14 . The LED module 12 is composed of two anti-parallel LED...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/48H05B45/10H05B45/345
Inventor 王俊棋
Owner ANALOG INTEGRATIONS CORP
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