Light emitting diode driving circuit and light apparatus having the same
US-2015084943-A1 · Mar 26, 2015 · US
LED luminescence apparatus and method of driving the same
US9101019B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9101019-B2 |
| Application number | US-201213360477-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 27, 2012 |
| Priority date | Jan 28, 2011 |
| Publication date | Aug 4, 2015 |
| Grant date | Aug 4, 2015 |
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Abstract
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An LED luminescence apparatus includes a plurality of LED units connected in series which are configured to receive a unidirectional ripple voltage, a plurality of switch units, one end of each being connected to the cathode of one of the plurality of LED units, a plurality of constant current control circuit units, one end of each being connected to an another end of a respective switch unit to receive a current from the respective switch unit, each of the constant current control circuit units being configured to output a current control signal to the respective switch unit to control a magnitude of the received current to have a specific value, and a current comparison unit to receive currents flowing from the plurality of switching units, and generate a plurality of switching control signals for the respective switch units to sequentially drive the plurality of constant current control circuit units.
First claim
Opening claim text (preview).
What is claimed is: 1. A light-emitting diode (LED) luminescence apparatus, comprising: a rectification circuit unit to receive an alternating current (AC) power voltage and rectify the AC power voltage to output a unidirectional ripple voltage; a plurality of LED units connected in series, each of the plurality of LED units comprising an anode and a cathode, the plurality of LED units being configured to receive the unidirectional ripple voltage; a plurality of switch units,…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9101019B2 cover?
- An LED luminescence apparatus includes a plurality of LED units connected in series which are configured to receive a unidirectional ripple voltage, a plurality of switch units, one end of each being connected to the cathode of one of the plurality of LED units, a plurality of constant current control circuit units, one end of each being connected to an another end of a respective switch unit t…
- Who is the assignee on this patent?
- Jong Young Do, Kang Hyun Gu, Jung Hye Man, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0818. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 04 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).