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DLP4710: What does the mirror tilt tolerance really mean?

May
Genius 9880 points
Part Number: DLP4710

Hi Team, 

Good day.

We received query from customer and want to confirm regarding the DLP4710 product. For me, to not  miss any information, I will copy the query below.

"Does the tilt tolerance of 1.4 degrees mean the pixels could be tilted +1.4 degrees and the pixel next to it be at -1.4 degrees from nominal?  Also, what is the tolerance on defective (bright and dark) pixels for this product?"

Thank you and looking forward for your kind response.

Regards,

Maynard

  • 0
    TI__Mastermind 22830 points

    Hello Maynard,

    The DLP4710 DMD is based on 5.4 uM TRP pixel architecture. The specification for the Mirror tilt angle  of TRP pixel is 17 degree and tolerance is +/-1.4 degree.

    The +/- 1.4 degree tolerance  is applicable to tilt  angle variation among DMDs from various lots.  Typically mirror tilt angle with  in a device are  very tight range..

    regards,

    Vivek

  • 0
    Prodigy 20 points

    Austin,

    Thank you for your answer.  

    When I was asking about the pixel tolerance I might not have asked it correctly.  Maybe the correct question is "what is the specification for bad pixels?"  How many pixels on a chip can be stuck on or off.  For the bad pixels can be together or do they need to be separated by a certain amount. Or if it is acceptable to have more bad pixels at the edges or corners?

    Clark

  • 0 in reply to Vivek Thakur
    Prodigy 20 points

    Vivek,

    Thank you for your answer.

    Clark

  • 0 in reply to Clark Pentico
    TI__Mastermind 22830 points

    Hi Clark,

    Please refer to section 6.11 on page 21 of DLP4710 DMD datasheet for "out of specification micro-mirror" entry. 

    www.ti.com/.../dlp4710.pdf

    No adjacent pixels can be defective and maximum 10 defective pixels in the complete device array. This is applicable  for  stuck "OFF" (dark ) pixel only. No defective bright pixels are allowed in the device.

    Hope this answers your question.

    regards,

    Vivek