Hi:
we bought a LightCrafter ,
it is said in the resolution is 608x684 , which means 8:9 .
but the projected image is nearly 4:7
what is the reason of it ?
and how can we verify the resolution ?
thank you ~
-diao
Xioachun Diao,
I apologize for the late response. I missed your question, and just discovered it. The following discussion should answer your question about the DLP3000 (LightCrafter DMD) resolution and aspect ratio.
The pixels in a diamond array (DLP3000) are exactly like those in an orthogonal array - except that the whole array is rotated 45 degrees.
Orthogonal:
Diamond:
Notice that there is no difference in the mirror-to-mirror relationship between the orthogonal and diamond. There is only a difference in the way that we define what is a horizontal row. Notice that each successive row is offset to the right or the left of the rows above and below.
A horizontal row is made up of the mirrors which touch only at the points, horizontally accross. By inspection of the geometry, you can see that the mirror spacing, center to center, for a horizontal row is (√2). The vertical spacing between rows is (√2)/2.
You will recall that the DLP3000 has a native resolution of 608x684. However, if you multiply by the factors above, you will see that the aspect ratio is 1.7777 (16:9).
