Current mirror circuit and method
US-2015327338-A1 · Nov 12, 2015 · US
Light-emitting apparatus and lighting appliance provided with the same
US2016249418A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016249418-A1 |
| Application number | US-201615046121-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 17, 2016 |
| Priority date | Jun 18, 2010 |
| Publication date | Aug 25, 2016 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
In various embodiments, a light-emitting apparatus is disclosed. In one example, the light-emitting apparatus comprises a substrate, an LED string mounted on the substrate, in which LED string a plurality of LEDs are connected in series, a power supply path connected in series to the LED string, and a plurality of protection elements, each protection element having a first node commonly connected to the power supply path and a second node connected between a pair of the LEDs in the series, wherein the protection elements include capacitors or zener diodes, and an AC impedance of each protection element is smaller than an impedance between the pair of LEDs and a case ground.
First claim
Opening claim text (preview).
1 . A light-emitting apparatus, comprising: a substrate; an LED string mounted on the substrate, in which LED string a plurality of LEDs are connected in series; a power supply path connected in series to the LED string; and a plurality of protection elements, each protection element having a first node commonly connected to the power supply path and a second node connected between a pair of the LEDs in the series, wherein the protection elements include capacitors or zener diodes, and an AC impedance of each protection element is smaller than an impedance between the pair of LEDs and a case ground. 2 . The light-emitting apparatus of claim 1 , wherein each pair of LEDs is different from each other pair of LEDs. 3 . The light-emitting apparatus of claim 1 , wherein each of the plurality of protection elements is arranged between each of the pairs of LEDs in the LED string and the power supply node. 4 . The light-emitting apparatus of claim 1 , wherein the protection elements include capacitors. 5 . The light-emitting apparatus of claim 1 , wherein the protection elements include zener diodes. 6 . The light-emitting apparatus of claim 1 , wherein each of the LEDs includes a plurality of light emitting elements. 7 . The light-emitting apparatus of claim 1 , including a housing to which the substrate is attached. 8 . The light-emitting apparatus of claim 1 , wherein the power supply path includes a first power supply node on an anode side of the LED string and a second power supply node on a cathode side of the LED string. 9 . The light-emitting apparatus of claim 8 , wherein: the plurality of protection elements includes a first set of protection elements and a second set of protection elements; the first nodes of the protection elements in the first set are commonly connected to the first power supply node; and the first nodes of the protection elements in the second set are commonly connected to the second power supply node 10 . The light-emitting apparatus of claim 8 , including another protection element arranged between the first and second power supply nodes.
Assignees
Inventors
Classifications
Converter circuits · CPC title
in a series array of LEDs · CPC title
Electricity · mapped topic
- H05B33/089Primary
Electricity · mapped topic
- H05B45/40Primary
Details of LED load circuits · CPC title
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Frequently asked questions
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- What does patent US2016249418A1 cover?
- In various embodiments, a light-emitting apparatus is disclosed. In one example, the light-emitting apparatus comprises a substrate, an LED string mounted on the substrate, in which LED string a plurality of LEDs are connected in series, a power supply path connected in series to the LED string, and a plurality of protection elements, each protection element having a first node commonly connect…
- Who is the assignee on this patent?
- Philips Lighting Holding Bv
- What technology area does this patent fall under?
- Primary CPC classification H05B33/089. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Aug 25 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).