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DLP3000-C300REF: DLP3000-C300REF: Mirror Damage due to Prolonged Static Pattern

Chi Ming Kan
Prodigy 70 points

Part Number: DLP3000-C300REF

I uploaded a static checkboard pattern to my DMD, but I forgot to turn off the DMD for two days and voltage was consistently applied to mirrors for >48 hours.

I have turned off the DLP LightCrafter EVM for another two days (+ve terminal connect to 5V, disconnected -ve terminal, open circuit).

Today I restarted my DMD, I found when I turn it to 'Solid White' and 'Solid Black', a 'background' checkerboard pattern exists along the path where there should be no light.

The DMD can still respond to my patterns but with a lower reflection efficiency.

I suspect that a proportion of mirrors are 'locked' on their 'ON' and 'OFF' states according to the standard checkerboard pattern because prolonged voltage was applied.

I would like to ask what measures can I do now to deal with this hardware failure, thank you!

  • 0
    TI__Genius 16950 points

    Hello,

    unfortunately, this is likely permanent damage to DMD. if a full power cycle of the system didn't fix these stuck pixels, then the DMD has been damaged.

    Regards,

    Arthur

  • 0 in reply to Arthur Brown
    Prodigy 70 points

    Dear Arthur,

      Thank you for your reply.

      Is a full power cycle equivalent to a complete operation cycle of the DMD? i.e. switching on, connecting to LightCrafter GUI, uploading and displaying patterns and finally disconnecting and switching off.

      If the DMD is damaged, are there any repairing service provided by TI?

    Regards,

    Chi Ming

  • 0 in reply to Chi Ming Kan
    TI__Genius 16950 points

    Hi Chi Ming,

    I should have been more clear. Optical aberrations can happen, and if they are related to the video processing of the ASIC then power cycling the device will reset the device and correct the aberrations

    If these aberrations are due to 'stuck' pixels in the DMD then power cycling the device will not fix the issue, because the DMD itself has been damaged. 

    TI does not have any service to repair damaged DMDs and the micromirrors are too small to be repaired. If you are using and EVM purchased in the last 90 Days you may be able to get this device replaced by contacting support for your region. https://www.ti.com/info/contact-us.html

    Otherwise the best option may be to replace the DMD itself.

    Regards,

    Arthur