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DLP4710EVM-LC: RGB LED optical engine effective power at far distances

Luis Lopez Mendoza
Prodigy 90 points
Part Number: DLP4710EVM-LC

Hello Forum,

I’m currently using this projector for 3D reconstruction in large volumes, so I need to project at 1.75 mts and 2.75 mts away.

By specs the RGB LED optical engine from Young Optics has a 476lm @ 35W or 605lm @ 50W. Does it refers to the RGB engine for white light? What about if I only use the Blue light? How much power will I lose?

Does anyone test a 3D reconstruction at the previous time closed distances?

There is a way or standard procedure to maximize the intensity i.e duty cycle or timings setup?

P.D I’m using the 2D splash frames streaming.

Thanks in advance.

  • 0
    TI__Expert 5290 points

    Hello User,

    Can you share the documentation of those optical engine specs and who created them? You nay need to contact YoungOptics directly.

    The team would have to investigate if your use case has been done before.

    The team can look see if any options are available to you.

    Regards,

    John

  • 0 in reply to John McKnight
    Prodigy 90 points

    Hello John, thanks too much for your reply.

    The optical engine available from Young Optics webpage is:

    Nevertheless, a question comes out: how can I switch from 35W to 50W, perhaps this is managed by the DLPC, do you know how to do it? i.e does it is from EVM GUI setting to maximum current is 50W mode?

    I'll try to contact YoungOptics as well.

    I hope TI team can give some light about previous use cases.

    Regards,

    Luis

  • 0 in reply to Luis Lopez Mendoza
    TI__Expert 5290 points

    Hello Luis,

    You can change the current of the LEDs when using the Light Control GUI.

    Please see the attached image.

    Regards,

    John

  • 0 in reply to John McKnight
    Prodigy 90 points

    Hello John,

    Thanks for the information, just to clarify: If I set the current of the blue LED to 16 A apx, then the device works at 50W power consumption, right?

    I did it, and the brightness looks suitable, but I'll have to wait until the camera grabbing test is being performed. 

    One additional question, in Splash Pattern Projection iI'm aware that I can set the values for  pre/post exposure dark time and the exposure itself, but there is a way (procedure/manual) to set it up like a strobe projection with the highest/efficient power?

    Kind regards,

  • 0 in reply to Luis Lopez Mendoza
    TI__Expert 5290 points

    Hello Luis,

    1.) Young Optics would be the best party to contact about power consumption. The test for those values would be ran by them.

    2.) That is not something that is defined for Light Control. Do you have a battery or power limitation for you use case?

    Regards,

    John

  • 0 in reply to John McKnight
    Prodigy 90 points

    Hi John,

    You're right I contacted YO and they gave me this information very quick, in fact there is a CW mode in the LED, (single LED usage), where I can get 3 times more brightness than the default one; sadly this NOT possible in the DLP4710EVM-LC because the device can't retrofit this feature. Additionally, the effective power consumption depends of the current Ampers passing through the LEDs. i.e R->10A || G-> 16A || B->16A leads to specified 605lm @ 50W

    Additionally, YO confirmed that this working distances and volumes are suitable.

    We are not facing any power supply limitation right now, and no, the device is not intended for battery usage.

    Thanks too much for the support.