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10 bit depth images

Tom Zhang
Prodigy 10 points
Other Parts Discussed in Thread: DLPC350

Hello,

I am working on LC4500. 

I would like to project a series of 10 bit depth images in Pattern Sequence mode using the Pattern Source from Flash. However, the Bit Depth options are only 1, 2, 3, …, 8- bit depth. So, how can I project a 10 bit depth image?

 Is it possible to do this?

 

 

Thank you and regards,

Zhang Tom

  • 0
    TI__Mastermind 30875 points

    Hello Zhang Tom,

    LC4500 platform don't have support for 10-bit pattern display. As of now it support 1 to 8 bit gray-scale patterns only. 

    Regards,

    Sanjeev

  • 0 in reply to Sanjeev
    TI__Expert 4720 points

    Hello Zhang Tom,

    I'd like to add some comments to Sanjeev's response. The DLPC350 creates gray-scale patterns by displaying binary bit-planes for different times which when combined create a very linear gray-scale pattern. Please reference Figure 2-6 in the DLPC350 Pogrammer's Guide for more information.

    The controller only supports up to 8-bit gray scale images as Sanjeev said, but there is a variable exposure and period pattern sequence mode in version 2 of the DLPC350 firmware which should make a 10-bit pattern possible using this advanced feature.

    The quick summary to create a 10-bit pattern is that you'll need to create a pattern sequence with one 8-bit pattern and two 1-bit patterns all sharing a single output trigger pulse. If the 8-bit pattern exposure is 8333us (the minimum value) you would set the first 1-bit pattern's exposure to 8333us which would give you a 9-bit pattern. To then create the 10-bit pattern you add the second 1-bit pattern with an exposure equal to 16666us. This will give you an overall exposure time of 33332us for the 10-bit pattern. 

    While this variable exposure pattern sequence mode is not currently enabled by the GUI, you can use the GUI source code and DLPC350 Programmer's Guide for reference to use the new mode. If you're interested in writing your own application code to accomplish a 10-bit pattern I can help you with the DLPC350 commands to construct the pattern sequence look-up tables.

    In summay, Sanjeev is correct that the DLPC350 does not directly support 10-bit patterns, but with some creativity using the advanced pattern sequence features it should be possible.

    Best regards,

    Blair