Load drive circuit, light emitting diode driver, and display device
US-2024397595-A1 · Nov 28, 2024 · US
LED backlight driving circuit, backlight module, and LCD device
US8994639B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994639-B2 |
| Application number | US-201213518429-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 21, 2012 |
| Priority date | May 16, 2012 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
The invention provides an LED backlight driving circuit, a backlight module, and an LCD device. The LED backlight driving circuit includes an LED light string; an input end of the LED light string is directly connected with an input end of a power source, and an output end of the LED light string is coupled with a buck module. In the invention, because the output end of the LED light string is in series connected with the buck module, the LED light string is connected in series between an input voltage and an output voltage, and a part of LEDs are directly supplied by the input voltage without the first stage conversion. Thus, the energy supplied by the buck module is reduced, the conversion efficiency is improved, the energy efficiency is increased, the requirement of the buck module to withstand voltage is reduced, and the device standard is decreased, thereby favoring cost reduction.
First claim
Opening claim text (preview).
We claim: 1. An LED backlight driving circuit, comprising: an input end of a power source electrically connected to one end of an energy storage inductor via two branches, wherein one branch comprises an LED light string and a diode, the other branch comprises a buck controllable switch, and the other end of the energy storage inductor is directly and always grounded, one end of said buck controllable switch is connected with said input end of said power source, and the other end o…
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Electricity · mapped topic
Physics · mapped topic
- G09G3/3406Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8994639B2 cover?
- The invention provides an LED backlight driving circuit, a backlight module, and an LCD device. The LED backlight driving circuit includes an LED light string; an input end of the LED light string is directly connected with an input end of a power source, and an output end of the LED light string is coupled with a buck module. In the invention, because the output end of the LED light string is …
- Who is the assignee on this patent?
- Gao Xinming, Yang Xiang, Li Fei, and 1 more
- 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 Mar 31 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).