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Optimization Method for LED Function and Voltage Requirements

IP.com Disclosure Number: IPCOM000234698D
Publication Date: 2014-Jan-29
Document File: 1 page(s) / 57K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention provides a methodology to improve the LED effectiveness by optimizing the voltage delivery on a planar, using as inputs 1) the required LED location 2) the LED specified drive voltage and 3) the voltages available in the required location, based on the board schematic and layout files. This solution can be applicable to any small, low current circuits that need to be placed in locations throughout a planar where the circuit specified drive voltage is not available.

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Optimization Method for LED Function and Voltage Requirements


Light emitting diodes are used throughout systems for multiple functions, including power-on, power-off, presence, busy, identification for hot-swap or fault detection. For simplification and usability, specific LED colors are used for certain functions and must be placed in logical locations in the system . The different colored LEDs require different input voltage levels to function correctly , with the desired color and brightness. Frequently, the LED required voltage is not present on the board at the desired LED location .

Previous solutions have not resolved the issue, but worked around it; driving LEDs with non-optimal voltages, resulting in too dim or too bright LEDs or creating exposure for early life fails; placing LEDs in non-ideal locations, making the function of the LED unclear and reducing customer satisfaction ; or routing LED required voltages all over the board, taking up valuable board space and metal layers.

This invention provides a methodology to improve the LED effectiveness by optimizing the voltage delivery on a planar , using as inputs


1) the required LED location


2) the LED specified drive voltage and


3) the voltages available in the required location, based on the board schematic and layout files.

The LEDs can be placed at the required locations, and the voltages available in those locations are regulated to match the LED specification . The solution utilizes small voltage...