TEam,
We are currently working on the DFMEA of our product.
We would like to understand the failure mode and the physics behind the "Parked" position.
Could you please share with us some explanations ?
thanks
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TEam,
We are currently working on the DFMEA of our product.
We would like to understand the failure mode and the physics behind the "Parked" position.
Could you please share with us some explanations ?
thanks
Hello User,
The parked position is to allow the DMD mirror array to not have stress on any of the mirrors when not in operation. There is a point of rotation to get the +- X degrees during operation and parking DMD mirror array when not in use reduces stress.
The team can look for some documentation to explain chipset parking.
With the brief explanation, can you come up with a list of more specific questions that you have? It will make it easier to get information and respond in a shorter amount of time.
Regards,
John
John, valeo would like to understand what happens if the parking mode isnt performed correctly (because the execution fails at the AM2 level or the DLP level) : what are the risks in terms of failure modes?
Hello User,
The park mode can help to maintain long-term DMD reliability. If the device operates beyond the datasheet specifications and results in any fault conditions, then this may affect device reliability, functionality, performance and reduce the device lifetime.
I hope this helps.
Regards,
Lori
hi Lori,
on "The park mode can help to maintain long-term DMD reliability" >> do you have any stats to see what is the statiscal effect of failing to enter park mode?
On "If the device operates beyond the datasheet specifications and results in any fault conditions, then this may affect device reliability, functionality, performance and reduce the device lifetime" >> I'm not sure of the point you're trying to make , can you please calrfiy ?
thanks
Hello O'Mellin,
The failure mechanism due to parking varies with the DMD Pixel architecture. The DLP2021-Q1 is based on 7.6 um pixel, and it tilts by 12 degrees along the axis. When the DMD is not parked properly, the mirror may be left in ON and OFF state,
A long exposure in this state could lead to hinge memory which will eventually result in that mirror being struck. It is not a catastrophic device failure, but at pixel level only. Such failure could occur after extended period. Please note that this torque is applicable while device is powered off after inappropriate shutdown.
. Once device is powered, the mirror will be back to normal operation assuming there was no damage.
The modeling may not be required DFMEA because it is a pixel level failure and device will be still operational. This may result in one of the pixels not correctly reproduced in the displayed image.
Hope this answers your concern.
regards,
Vivek