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What is DLP LightCrafter? Can I use for... :)

kazola
Guru 18595 points

Hi everybody!

Sorry for such a silly question but this is my first time with DLP stuff.

I was wondering if I can use LightCrafter as some sort of LED transmitter, that is for Visual Light Communications. This is the same way as in optic fiber but muuuuuch more slower, I know, and over-the-air.

I mean, DLP could allow me sending an OOK modulated light signal to 5 meters ago or more in a focused way? This should be clearly detectable by a receiver.

Ok, let me know! :D

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    TI__Genius 9935 points

    Hi Kazola. Welcome to the DLP&MEMS E2E. I notice that you have been very active on various E2E fora, but perhaps new to DLP&MEMS.

    Yes. You can use a DLP as a light modulator for data transmission via light. The DLP device (DMD) is an array of thousands or millions of individual mirrors, each of which can be tilted in an "on" or "off" position (+/-12 degrees). In the simplest case, all of the mirrors could be set to the same state representing a "1" or "0" for each entire frame, and thereby on/off modulate the light at up to the maximum binary frame rate for the DMD (4000 - 23000 fps). However, if you have a camera which can distinguish the on/off state of each pixel, and has a high enough capture speed, theoretically you could transmit massively parallel data at a moderate baud rate but high data rate. You could also use the DMD as an amplitude modulator to provide analog modulation (intensity modulation) for a modest analog bandwidth, along with a simple analog intensity detector.

    These are all possibilities. There may be more direct ways to accomplish these feats, though.