Lamp control device
US-2024166131-A1 · May 23, 2024 · US
Open LED detection and recovery system for LED lighting system
US8928231B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8928231-B2 |
| Application number | US-201213567253-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 6, 2012 |
| Priority date | Dec 1, 2011 |
| Publication date | Jan 6, 2015 |
| Grant date | Jan 6, 2015 |
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Abstract
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A fault-tolerant controller for a lighting system comprising: a plurality of light emitting diode (LED) circuits and a controllable power source to power the plurality of LED circuits. The controller comprising a minimum voltage selector to determine a minimum voltage from a plurality of feedback voltages, one feedback voltage for each of the plurality of LED circuits. A control logic to regulate the drive voltage for the LEDs; and an overvoltage warning mechanism to determine an overvoltage of the drive voltage. The controller identifies one or more open-circuit conditions, one for each LED circuit, for which the respective feedback voltage is below an open-circuit threshold, and which causes the minimum voltage selector to exclude one or more respective feedback voltages associated with the LED circuits which have an open-circuit condition.
First claim
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What is claimed is: 1. A controller for controlling a drive voltage for a lighting system comprising a plurality of light emitting diode (LED) circuits, the controller comprising: a minimum voltage selector configured to accept a plurality of feedback voltages, one for each of the plurality of LED circuits, and determine a minimum feedback voltage from said plurality of feedback voltages; a control logic for determining one or more open-circuit conditions indicating that the res…
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Frequently asked questions
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- What does patent US8928231B2 cover?
- A fault-tolerant controller for a lighting system comprising: a plurality of light emitting diode (LED) circuits and a controllable power source to power the plurality of LED circuits. The controller comprising a minimum voltage selector to determine a minimum voltage from a plurality of feedback voltages, one feedback voltage for each of the plurality of LED circuits. A control logic to regula…
- Who is the assignee on this patent?
- Campos Marcelo De Paula, Scaldaferri Stefano, Dialog Semiconductor Gmbh
- What technology area does this patent fall under?
- Primary CPC classification H05B45/58. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 06 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).