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LED network

A technology of light-emitting diodes and tube cores, applied in the direction of electroluminescent light sources, light sources, electric light sources, etc., can solve the problems of poor performance, high price, and low efficiency of LED lights

Inactive Publication Date: 2012-12-05
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, AC driven LED lamps have poor performance and are less efficient and expensive depending on the size of the LED die area used

Method used

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Embodiment Construction

[0029] The embodiments or examples shown in the drawings are disclosed below using specific language. However, it should be understood that these embodiments and examples are not limiting. Any alterations and modifications in the disclosed embodiments, and any further application of the principles disclosed herein are contemplated, as would normally occur to one of ordinary skill in the art. Reference numerals may be repeated throughout the embodiments, but even though the embodiments use the same reference numerals, there is no requirement that components from one embodiment be implemented in another embodiment.

[0030] A light emitting diode (LED) as used herein is a semiconductor light source for generating light of a specific wavelength or range of wavelengths. LEDs have traditionally been used for indicator lights and increasingly for general lighting and displays. LEDs emit light when a current is driven through a p-n junction formed by layers of oppositely doped semi...

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Abstract

An LED device or an LED circuit comprises a plurality of LED segments which are connected in series, wherein the LED segments additionally comprise parallel subcircuits, and turning-on and turning-off of the LED segments depend on an input voltage of the LED segments. When the input voltage changes, no LEDs emits light, or different parts of the LEDs emit light, or all of the LEDs emit light. Responsive to AC power, the input voltage of the LED segments can come from an input voltage of a bridge rectifier. The LED device or the LED circuit does not comprise an inductor, a transformer or an electrolytic capacitor. The invention also provides an LED network.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application Serial No. 61 / 492,601, filed June 2, 2011, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to light emitting diode (LED) networks. Background technique [0004] Current light-emitting diode (LED) lighting methods suffer from various drawbacks. In a direct current (DC) driven LED lamp, an AC-DC converter is used to provide a DC current to make multiple LED dies emit light. AC-DC converters use multiple large and inefficient components such as transformers and electrolytic capacitors. Electrolytic capacitors also have greater capacitance change, poorer temperature tolerance, and shorter lifetime than other types of capacitors. Therefore, while LEDs can have high efficiency and reliability and long life, DC driven LED lamps are unreliable and expensive due to AC-DC conversion. ...

Claims

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Application Information

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IPC IPC(8): H05B37/00
CPCH05B33/0809H05B33/0827Y02B20/348Y02B20/30H05B45/48H05B45/46
Inventor 杨悟铭邱科智谭昌琳
Owner EPISTAR CORP