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Original question:

DLP2000: Controlling the Pixels of the Image

DLP2000: DLP2000EVM

Krishna Bidwai
Prodigy 230 points
Part Number: DLP2000
Other Parts Discussed in Thread: DLPC3470, DLPC3478

Hi All,

I would like to know if there is way to lock the Micro-Mirros in DLP2000EVM using some code or any other techniques. 

Regards,

Krishna Bidwai

  • 0
    TI__Mastermind 20045 points
    Hello Krishna,

    What is your intended use case of this feature? If you just want to ensure the same image is being projected on the system you can use the Display Buffer Swap Freeze command (0xA3). You can find this command in the software programmers guide at www.ti.com/.../dlpu013.pdf

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Prodigy 230 points

    Hi Kyle,

    I want to have more control over the micro mirrors. I am more interested in this as using this I can use this for few pixels rearrangement which eventually helps me in better encryption.

    ps: I don't want to set the values as just 0 and 1. But want to set to intermediate value. In general, I would like to change the angle of micromirros. (+ or -). Please see the below image from Texas site. This is how the DLP works, but would like to know if a end user can do the same.

    BR,
    Krishna

  • 0 in reply to Krishna Bidwai
    TI__Mastermind 20045 points
    Hello Krishna,

    The mirrors are only controllable to be either on or all off. Color is reproduce by rapidly toggling the mirrors on and off (PWM). This paper may provide some additional information about a certain type of our DMDs: www.ti.com/.../dlpa008b.pdf

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Prodigy 230 points
    Kyle,

    Can you please elaborate or provide me few links from which It is clear DLP2000EVM is not capable to program the micro-mirror.

    Thank you!

    BR,
    Krishna
  • 0 in reply to Krishna Bidwai
    TI__Mastermind 20045 points
    Hello Krishna,

    The linked paper should explain the DMD operation. While the mirrors are individually addressable, they are individually addressable to be either all on or all off. It is not possible to control them to intermediate values. If you would like you can also look at the DMD datasheet (e.g. for the DLP2000).

    Note that different controllers that are paired with different DMDs may add some processing functionality onto your input image. In order to more accurately address individual mirrors you will want to look at our light control platform (e.g DLPC3470 and DLPC3478). However, this platform still doesn't allow intermediate angles of the DMD mirrors as that is a limitation of the DMD itself. I hope this explanation helps!

    Thanks,
    Kyle