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DLP4500: Lightcrafter - RGB outputs only in grayscale

John Vanston
Prodigy 30 points
Part Number: DLP4500

Hello,

I'm trying to use a Lightcrafter to display simple colored patterns. RGB signals are sent from a PC to the mini-HDMI port. The issue is that all such signals come out of the DLP entirely in grayscale.

The device is still capable of showing full-color patterns. In the GUI, if I set the Video Mode input to the "Color Bar" internal test pattern, and set the LED control to "Automatic", colors display normally. However, if I set the Video Mode input to "Parallel RGB", all inputs result in grayscale outputs. It might be worth noting that I can force the Color Bar pattern to display in grayscale, by changing the LED control to "Manual". This might not be diagnostically relevant, but it's not clear to me why this should happen.

Any advice or guidance would be appreciated!

Notes:

-Issue persists across multiple DLP4500 Lightcrafter devices

-Issue persists across multiple HDMI - mini-HDMI cables

Specs:

OS: Windows 10 Home, 64-bit

Graphics card: GeForce GTX 1060 3GB

GUI: v3.1.0

  • 0
    TI__Genius 9971 points

    Hi John,

    I would suggest you to reproduce the same issue using latest GUI version and latest firmware version available on ti.com and let us know your findings.

  • 0 in reply to Mayank Khandelwal
    Prodigy 30 points

    Thank you for the suggestion. Issue persists after updating GUI to version 4.0.0 and updating firmware to version 4.1.0. 

  • 0 in reply to John Vanston
    TI__Genius 10925 points

    Hi John, 

    We can confirm at our side that the Lightcrafter 4500 can display color image through parallel/HDMI input in Video Display mode. We will require some more specific info from you to debug this issue faster:

    1. The complete steps to reproduce the issue on out of the box LCR4500 unit (on FW v4.1.0 and GUI v4.0). The attached INI (if any), the complete list of configuration done and any other steps. Also kindly provide the color bar image that you are trying to display.

    2. Try with other PC/ GPU and see if the issue persists.

    Thanks & Regards,

    Hirak.

  • 0 in reply to Hirak Biswas
    Prodigy 30 points

    The issue has been resolved. The RGB inputs were being fed through a third-party graphics device, and circumventing this device (in conjunction with updating the firmware) seems to have done the trick. Thanks for your assistance!