Sequential Linear LED System With Low Output Ripple
US-2015382414-A1 · Dec 31, 2015 · US
Current ripple canceling LED driver
US9107260B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9107260-B2 |
| Application number | US-201314039072-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 27, 2013 |
| Priority date | Jun 4, 2013 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.
First claim
Opening claim text (preview).
What is claimed is: 1. A current ripple canceling LED driver, comprising: an input source, a filtering capacitor and an LED load, characterized in that, the LED load is connected to a power switch, the source of the power switch is connected to a current sensing resistor, the gate of the power switch is connected to the output of an operational amplifier, wherein the input source is a current source containing a current ripple, the operational amplifier compares the voltage sign…
Assignees
Inventors
Classifications
- H05B45/395Primary
Electricity · mapped topic
- H05B33/0815Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9107260B2 cover?
- A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signa…
- Who is the assignee on this patent?
- Shanghai Bright Power Semiconductor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H05B45/395. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 11 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).