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DLPC3430: About latency of video input then projected

Part Number: DLPC3430


We are surveying to use DLPC3430 in our customer's product.

There is only one line description on datasheet says the latency is 1 frame.

Some questions we want to know but not much information on data sheet.

Listed below 

1.What is the buffering scheme of DLPC3430?

2.Do you have any information about expected latency between when the output buffer is written and when it is projected?

Our system scheme is expected to use an SoC to feed signal via DSI and the frame rate would be 60Hz but might be higher resolution then native DMD..

3. We think  one frame is minimum latency. Scaling and keystone might also contribute to latency.

Are we right? If yes, how much latency these or any additional image processing could contribute?

Do you have any suggestion in design if we want to reduce latency as low as possible?

Or there actually only one frame latency for any condition?

  • Hello ASKA,

    1. The DLCP3430 uses a double buffering scheme.

    2. There is a one frame delay. Therefore, the time between sending a frame to the DLPC3430 and it being sent to the DMD is 1/ frame rate. Note the DMD uses a time sequential display and therefore the image isn't entirely shown at the same instant. 

    3. The one frame delay is the same regardless of image processing.

    Therefore, the main way to decrease latency would be to increase the frame rate if possible (such as from 60 Hz to 120 Hz). Please let me know if you have any additional questions.

    Thanks,

    Kyle