High-precision led control circuit, method and led driver thereof
US-2015382418-A1 · Dec 31, 2015 · US
Load driving device and electronic device using the same
US9148917B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9148917-B2 |
| Application number | US-201213354387-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 20, 2012 |
| Priority date | Jan 20, 2011 |
| Publication date | Sep 29, 2015 |
| Grant date | Sep 29, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A load driving device includes a switch element configured to generate an output voltage to a load from an input voltage depending on an ON/OFF operation thereof, a switch controller configured to control the ON/OFF operation of the switch element such that a feedback voltage obtained by subtracting a dropped voltage of the load from the output voltage and a predetermined reference voltage are maintained to be consistent, and a variable current source configured to perform ON/OFF controlling of a driving current flowing to the load in response to a driving current control signal. When the switch element is in an ON state at an OFF timing of the driving current, the switch controller maintains the switch element in the ON state thereafter, and turns off the switch element when the ON period of the switch element reaches a predetermined period.
First claim
Opening claim text (preview).
What is claimed is: 1. A load driving device comprising: a switch element configured to generate an output voltage to a load from an input voltage depending on an ON/OFF operation of the switch element; a switch controller configured to control the ON/OFF operation of the switch element such that a feedback voltage obtained by subtracting a dropped voltage of the load from the output voltage and a predetermined reference voltage are maintained to be consistent; and a variable…
Assignees
Inventors
Classifications
Cross-Sectional Technologies · mapped topic
- H05B33/0815Primary
Electricity · mapped topic
- H05B45/38Primary
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US9148917B2 cover?
- A load driving device includes a switch element configured to generate an output voltage to a load from an input voltage depending on an ON/OFF operation thereof, a switch controller configured to control the ON/OFF operation of the switch element such that a feedback voltage obtained by subtracting a dropped voltage of the load from the output voltage and a predetermined reference voltage are …
- Who is the assignee on this patent?
- Omi Masaki, Terasaki Fumihiko, Rohm Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0815. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 29 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).