Circuit device and lighting device
US-2024260155-A1 · Aug 1, 2024 · US
AC-DC dual-use LED driving circuit
US8941326B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941326-B2 |
| Application number | US-201213346851-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 10, 2012 |
| Priority date | Jun 8, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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An Alternating-current-Direct-current (AC-DC dual-use) Light Emitting Diode (LED) driving circuit includes an input power circuit, a buck-boost converter, and a Pulse Width Modulation (PWM) signal controller. The buck-boost converter, including a switching transistor and a feedback resistor, receives a current signal output from the input power circuit, and drives an LED with a driving signal. The PWM signal controller outputs a PWM signal according to the driving signal, so as to sequentially turn on and turn off the switching transistor. One end of the feedback resistor is coupled to the LED, and a floating ground terminal of the PWM signal controller is coupled to the switching transistor and the other end of the feedback resistor. Therefore, the AC-DC dual-use LED driving circuit is capable of dynamically adjusting the duty ratio of the PWM signal without connecting an external photocoupler.
First claim
Opening claim text (preview).
What is claimed is: 1. An Alternating-current-Direct-current (AC-DC) dual-use Light Emitting Diode (LED) driving circuit, suitable for driving an LED, comprising: an input power circuit for outputting a current signal; a buck-boost converter for receiving the current signal and outputting a driving signal, the AC-DC dual-use LED driving circuit driving the LED by the driving signal, the buck-boost converter comprising a switching transistor and a feedback resistor, and one end o…
Assignees
Inventors
Classifications
- H05B45/37Primary
Electricity · mapped topic
Electricity · mapped topic
- H05B33/0809Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8941326B2 cover?
- An Alternating-current-Direct-current (AC-DC dual-use) Light Emitting Diode (LED) driving circuit includes an input power circuit, a buck-boost converter, and a Pulse Width Modulation (PWM) signal controller. The buck-boost converter, including a switching transistor and a feedback resistor, receives a current signal output from the input power circuit, and drives an LED with a driving signal. …
- Who is the assignee on this patent?
- Li Yan-Cun, Liu Hsing-Fu, Chang Jui-Chi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H05B45/37. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 27 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).