LCD: Replacing CCFL with LEDs

[Fileark] had the backlight on his digital picture frame go out one day. These are generally Cold Cathode Fluorescent Lamps which require an inverter to source the voltage necessary for proper operation. When they stop working, the inverter is usually to blame. Since that circuit is made up of pretty small surface mount circuitry, he decided to replace the backlight with LEDs rather than repair the inverter.

In the video after the break [Fileark] will walk through the entire project. After snooping around inside the picture frame he sizes up a strip of LEDs on a flexible substrate. The metal retaining bracket that hosts the LCD must be altered to fit the new light source and for that, he’s included a hacking montage in his video. The final result looks stock and he estimates the screen is around 97% as bright as with the original backlight.

This isn’t the first time we’ve seen an LED edge-lit upgrade. The last one we saw even used a custom PCB to host the LEDs.

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Watercooled LED backlit LCD


[john] mentioned this on the LCD LED backlight post. Given the date on the posts, I was surprised that we haven’t seen it before. He replaced the CCFL lamp with 32 1 watt luxeon LEDs mounted on a custom copper water cooling block. The result is bright enough to be sunlight viewable in his car.

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