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Browse Prior Art Database

LED Light life extension

IP.com Disclosure Number: IPCOM000038517D
Original Publication Date: 2005-Jan-31
Included in the Prior Art Database: 2005-Jan-31
Document File: 2 page(s) / 135K

Publishing Venue

IBM

Abstract

Today LED technology is replacing standard lighting technology because it has the capability of having several LEDs which reduces the chance that they will fail at the same time and extending the life of a device. The LED technology still has a finite life cycle.The idea is based on the concept that an LED has a max life cycle of time Z in a mass number of LED(s) so in the event that one fails the mass number insures it is as close to Z total as possible. The concept is to not power all LEDs at the same time and power the “off LEDs” as LEDs fail or power on a number of LEDS as X number (or percent) of them fail. This will give the device a new life cycle of 2x Z. This allows a longer life cycle and reduces maintenance cost. Examples of technology usage: (Red Lights, Flash lights, etc)

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LED Light life extension

    The idea is based on the concept that an LED has a max life cycle of time Z in a mass number of LED(s) so in the event that one fails the mass number insures it is as close to Z total as possible. The concept is to not power all LEDs at the same time and power the "off LEDs" as LEDs fail or power on a number of LEDS as X number of them fail (figure 1). This will give the device a new life cycle of 2Z. This allows a longer life cycle and reduces maintenance cost. Examples: (Red Lights, Flash lights, etc)

Start with off Lights

Figure 1

    This could be implemented with patterns (or different coloed lights) to allow a person to see very quickly what % LEDs are left (figure 2 and 3).

Figure 2

End with off Lights "ON"

1

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Figure 3

    One aspect for verification/determination of the % LEDs failed could be the use of a transparent overlay that the user looks trough at a distance to determine the primary LEDs and the Back up LED total (figure 4).

Figure 4

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