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Projected
Image
Any screen 1. No adjacent pixels.
2. No bright pixels ( Active Area )
3. <= 1 bright pixel ( SOM )
4. ≤ 4 dark pixels
5. ≤ 6 minor blemishes.
6. No DMD window aperture shadowing on the
Active Area
7. No unstable pixels in Active Area
Notes :
1. Projected blemish numbers include the count for the shadow of the artifact in addition to
the artifact itself, so that the count usually represents a single artifact on the window.
2. No blemish shall be more than 5 inches long or have a total area of more than 5 square
inches on a 60 inch diagonal projected image. ( <= 1/2 inch for Major Blemish tests )
3. During all Table 1 tests , projected images shall be inspected in accordance with the
conditions of inspection specified in Section 3.
4. The rejection basis for all cosmetic DMD defects ( scratches , nicks , particles ) will be
the projected image tests referenced in Table 1.
5. Any other image quality issue not specifically defined in this document shall be
acceptable.
6. Black screens shall not be used as a basis for rejecting DMDs for image quality.
Figure 1. Major Blemish Two Zone Screen
Non Critical Zone
Critical Zone
center 25%