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DMD Image Specification
1.SCOPE
This document specifies the image quality requirements applicable to the DLPTM XGA Component Set. The Component Set provides the DLPTM XGA Projector with digital imaging functionality based on Digital Micromirror Device (DMD) technology.
2.Definitions
2.1Blemish
A blemish is an obstruction, reflection, or refraction of light that is visible, but out of focus in the projected image under specified conditions of inspection (see Table 1). It is caused by a particle, scratch, or other artifact located in the image illumination path.
2.2Dark pixel
A single pixel or mirror that is stuck in the OFF position and is visibly darker than the surrounding pixels.
2.3Bright pixel
A single pixel or mirror that is stuck in the ON position and is visibly brighter than the surrounding pixels.
2.4Unstable pixel
A single pixel or mirror that does not operate in sequence with parameters loaded into memory. The unstable pixel appears to be flickering asynchronously with the image.
2.5Adjacent pixel
Two or more stuck pixels sharing a common border or common point, also referred to as a cluster.
2.6Streaks
Artifact resulting from locallized variation in mirror tilt angle relative to surrounding mirrors. They are similar in appearance to window scratches but appear at the mirror level. Streaks appear as faint diagonal or arcing patterns in the image.
2.7Sea of Mirrors (SOM)
SOM is a rectangular array of
2.8Eyecatcher
A small localized light spot which has high spatial frequency and high differential brightness. These are due to various DMD window or window aperture defects including: digs, voids, particles and scratches.
2.9Border Artifacts
All variations of these artifacts are acceptable under this image quality specification. Border artifacts are a general category of image artifacts that may show up on screen in the area outside of the active array. Border artifacts include: Exposed Bond Wires, Exposed Metal 2, and Reflective Edge.
2.9.1Bond Wires
Bond Wires attach the die to the superstructure. If visible, they will appear as short light
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