Load drive circuit, light emitting diode driver, and display device
US-2024397595-A1 · Nov 28, 2024 · US
LED backlight source and liquid crystal display device
US9380673B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9380673-B2 |
| Application number | US-201314000228-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2013 |
| Priority date | Apr 24, 2013 |
| Publication date | Jun 28, 2016 |
| Grant date | Jun 28, 2016 |
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.
The present invention provides LED backlight source of liquid crystal display device. The LED backlight source includes: a boost converter, boosting input DC voltage and outputting boosted DC voltage; a plurality of LED strings connected in parallel, with each LED string including a plurality of LEDs in series and receiving boosted DC voltage from boost converter; a plurality of constant-current drivers, controlling current of each LED string, each constant-current driver controlling at least an LED string and first constant-current driver controlling connection/disconnection of boost converter; an under-voltage protection control circuit, outputting under-voltage protection voltage to constant-current drivers and constant-current drivers determining whether to stop operating based on received under-voltage protection voltage, wherein under-voltage protection voltage outputted to first constant-current driver less than under-voltage protection voltages outputted to other constant-current drivers. The LED backlight source can turn on and off LED strings simultaneously to improve the optical quality.
First claim
Opening claim text (preview).
What is claimed is: 1. An LED backlight source of liquid crystal display device, which comprises: a boost converter, for boosting the input DC voltage and outputting boosted DC voltage; a plurality of LED strings connected in parallel, each LED string comprising a plurality of LEDs strung in series and receiving the boosted DC voltage from the boost converter, in each of the plurality of LED strings, the plurality of LEDs strung in series being further connected to a fourth resi…
Assignees
Inventors
Classifications
- G09G3/3406Primary
Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · 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 US9380673B2 cover?
- The present invention provides LED backlight source of liquid crystal display device. The LED backlight source includes: a boost converter, boosting input DC voltage and outputting boosted DC voltage; a plurality of LED strings connected in parallel, with each LED string including a plurality of LEDs in series and receiving boosted DC voltage from boost converter; a plurality of constant-curren…
- Who is the assignee on this patent?
- Shenzhen China Star Optoelect, Shenzhen China Star Optoelect
- What technology area does this patent fall under?
- Primary CPC classification G09G3/3406. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 28 2016 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).