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DLPDLCR3010EVM-G2: DLP3010 Lightcrafter GUI Tool: how to disable all input image modification

Julie Estivie
Intellectual 315 points
Part Number: DLPDLCR3010EVM-G2
Other Parts Discussed in Thread: DLPC3433, DLPC3478

Hi,

I would like to disable all the resize/crop/algorithm made on the input image of the lightcrafter.

My input image is in RGB 24 bits, format 1280x720 sent at 60 FPS. I would like to display them exactly wihout any modification from the lightcrafter. Image crop is set as following:

Start Pixel: 0

Start Line: 0

Pixels per line: 1280

Lines per frame: 720

However, I see black borders around my output display, which makes me think that my input image has actually been a little bit cropped to add these borders... Am I right ? Is there a way to get rid off these borders ? Is there any thing else I should disable/enable ?

Kind regards,

Julie

  • 0
    TI__Expert 4610 points
    Hello Julie,

    Thanks for your interest in DLP Technology.

    This platform DLPDLCR3010EVM-G2 has one to one pixel mapping, So you are seeing the full input image 1280x720 one - one mapped onto DMD pixels. Reason behind seeing the black borders is because there is a overfill pixels over the DMD size for optics settling, So you are seeing the black light on those overfilled pixel.

    From your query it looks like you want the pixel - perfect accuracy. As this EVM (DLPDLCR3010EVM-G2) has DLPC3433 controller mainly for Pico Display Applications, So we can not remove the Image processing algorithm from it , these algorithms runs in pipeline which can't be removable.

    If you looking For Pixel perfect accuracy ( Sensing applications ) then we have a different controller for that which uses the same DMD.
    You Can find it here : www.ti.com/.../description

    Please let us know if you need any help.

    Thanks,
    Navneet
  • 0 in reply to Navneet Singh
    Intellectual 315 points
    Hi Navneet,

    Thanks for your answer. I have a few more questions thought.

    1. Could you be more precise about the "overfill pixels over the DMD size"? Does this mean that the DMD of the lightcrafter has more than 1280x720 mirrors? Or are pixels not 1-to-1 linked to DMD mirrors?

    2. Can you confirm that this is not possible to disable all algorithms even if we re-program the MSP430?

    3. Is the default output frequency of the lightcrafter 60Hz? How can we change/check it?

    4. We were expecting each led to be used FREQ/3 per cycle, i.e. each led is turned on 5.5 ms each 16.6 ms. But the behavior seems to be different. Could you explain me how it works?

    Kind regards,

    Julie
  • 0 in reply to Julie Estivie
    TI__Expert 4610 points
    Hello Julie,

    Please see my answers :

    1. Could you be more precise about the "overfill pixels over the DMD size"? Does this mean that the DMD of the lightcrafter has more than 1280x720 mirrors? Or are pixels not 1-to-1 linked to DMD mirrors?

    >>> DMD Active array size is 1280x720 and these Pixels are linked 1-1 with DMD Mirrors. There is few Overfilled Pixels which are Inactive, we can not use Inactive pixels that's the reason they always stays in off state and you see Black light.

    2. Can you confirm that this is not possible to disable all algorithms even if we re-program the MSP430?

    >>> DLPC3433 controller is used in this EVM, and all algorithms is inbuilt in this controller for Display. which can not be disable.

    3. Is the default output frequency of the lightcrafter 60Hz? How can we change/check it?

    >>> Yes, default output frequency support for this Lightcrafter is 60Hz. You can not change the frequency if it is not in the firmware. You need to change the firmware for multiple frequency. Let me know if you want the new firmware with different frequencies, i will get it done in few days.

    4. We were expecting each led to be used FREQ/3 per cycle, i.e. each led is turned on 5.5 ms each 16.6 ms. But the behavior seems to be different. Could you explain me how it works?

    >>> To achieve the white point on LED system it needs the different duty cycles for different colors.

    Thanks,
    Navneet
  • 0 in reply to Navneet Singh
    Intellectual 315 points
    Hi Navneet,

    Thanks for your answers.
    Do you know what the builtin algorithms of the DLPC3433 do ? For example, if all the pixels of the input images are set to the same value, will all the mirrors of the DMD have the same behavior ?

    Actually we want to work with the DLPC3478 but it is not available yet and we are trying to see if we can emulate the 1bit pattern mode with the DLPC3433 by finding RGB values that will drive the DMD mirrors as we want.

    Kind regards,

    Julie
  • 0 in reply to Julie Estivie
    TI__Expert 4610 points
    Julie,

    DLPC3433 has many Builtin algorithm and they do improve the image quality, brightness control, WPC and so on.

    Yes all mirrors of the DMD will have the same behavior when set to same pixel value.

    I can understand that you want 1:1 pixel accuracy. DLPC3433 is not the correct controller to provide this feature.

    DLPC3478 prototype sample is available here: www.ti.com/.../DLPC3478

    Another options are :
    if you are looking at pattern synchronization and 1:1 pixel accuracy and grayscale linearity, DLP LightCrafter 4500 is better suited. You can use the DLP LightCrafter 4710 if you are using binary b&w patterns.

    DLP LightCrafter 4710 mostly intended for regular video display while DLP LightCrafter 4500 customized for structured light kind of applications.

    Thanks,
    Navneet
  • 0 in reply to Navneet Singh
    Intellectual 315 points
    Hi Navneet,

    Thanks for all your answers.

    Kind regards,

    Julie