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DLP broken

Domenico Ghezzi
Prodigy 30 points

Good evening to all,

I need one information, (if possible) The DLP projectors when are affected by the laser beam in the lens (discoteque) there is a big risk to damage the projectors?
for me it is the only way to permanently damage the DLP projectors.
I pose my question to TI DLP manager.
Thanks a lot
best regards
D. Ghezzi

  • 0
    TI__Intellectual 2175 points

    Hello Domenico,

    I recommend you contact the manufacture of the DLP(R) projector to determine what type of damage a laser beam, directed into the projection optics, will cause.

    Best regards,

    Eric

  • 0 in reply to ELD
    Prodigy 30 points

    I don't receive any information about the problem, but i see the DMD (TI) chip broken,
    to clarify the problem's an example: it seems as if someone makes a scribble on the DMD chip.

    My question is directly to T.I. DLP department

  • 0 in reply to Domenico Ghezzi
    TI__Intellectual 2175 points

    Hello again Domenico.  Can you describe your application in more detail?  How is the laser beam directed into the projector optics?  What additional details about the laser beam can you provide (e.g. wavelength, power, etc.)?  Why are you projecting an laser into the projector optics?

    Thanks,

    Eric

  • 0 in reply to ELD
    Prodigy 30 points

    Hi Eric

    I have seen some DLP projectors in my lab, those of which I speak were installed in disco-pub and some disco (there were lasers) had the dmd marked as if a ray of light hit the fast optical then the chip dmd.
    No other DLP, independent of the brand has never had this problem. I see about 200 DLP projectors a year (see also LCD, D-Ila, CRT, etc.).
    That's why my question, where the laser beam in the disk (the laser moves and rotates) affects the optical marks the DMD projection you see black stripes, sometimes small (little incident laser) sometimes a little larger.
    it seems as if a person designs something with a marker. Now those DLP are no longer here, have been thrown away.
    I simply told the owners to obscure the optical and calibrate the laser so you do not ever hit the lens.

    Many thanks for your cooperation

    Domenico

  • 0 in reply to Domenico Ghezzi
    TI__Intellectual 2175 points

    Hi Domenico,

    That is very interesting.  DLP DMDs can certainly work with coherent light (ie laser) illumination.  However, there are limitations to the average power density and peak power density that can be applied to the DMD micromirror array.  

    The application note, Laser Power Handling for DMDs discusses these considerations in some detail.  After you read through the app note, see if the laser you are using exceeds the recommended power density of the respective DMD.

    Thanks for sharing details of how you are using DLP Technology.

    Eric