DLP9500 Max Pattern Rate

Hello RY,

Our sincere apology that your request got overlooked.

The 140 µs is a copy and paste error when the datasheet was updated for public release.  This is already in our list of items to correct on the next revision of the datasheet, which should be sometime this year.

The correct number is  56.2 µs for Global operation.  Global operation is when data is loaded to the array and then a Mirror Clocking Pulse [MCP] is sent to the entire array at the same time.  This is 43.2 µs loading time at 400 MHz DDR (LVDS) plus 2 µs MCP time plus 11 µs µ-mirror settling time (13 µs total for MCP + Settling].  This only gives approximately 17.8 k Binary Patterns per Second [BPPS].

To achieve the 23 kBPPS you must use "Phased" operation.  This works in a manner similar to a rolling shutter on a digital camera.  You can be loading data in one section of the DMD while waiting for the MCP + Settle Time in another section.  This allows the 13 µs MCP + Settle Time to be "hidden" during the loading of another section.  In this mode the refresh time is just the load time of 43.2 µs which gives ~23 kBPPS. 

The caveat is the same as a rolling shutter on a digital camera - The image is not displayed all at the same time.  This is not a problem for a human eye or a camera with a sufficiently long integration time.  See this Wikipedia article on Rolling Shutter.  <-- click

I hope this helps.

Best regards,

Fizix