PARAMETER |
TEST CONDITIONS |
MIN |
NOM |
MAX |
UNIT |
Micromirror
tilt—half
angle, variation device to device (1) |
|
11 |
12 |
13 |
° |
Axis of rotation with
respect to system datums, variation device to
device(2) |
|
44 |
45 |
46 |
° |
Image performance(3) |
Bright pixel(s) in active
area(4) |
Gray 10
screen(5) |
|
|
0 |
micromirrors |
Bright pixel(s) in the POM(6) |
Gray 10
screen(5) |
|
|
1 |
Dark pixel(s) in the active
area(7) |
White
screen |
|
|
4 |
Adjacent pixel(s)(8) |
Any
screen |
|
|
0 |
Unstable pixel(s) in active
area(9) |
Any
screen |
|
|
0 |
(1) Limits on variability of micromirror tilt half angle are
critical in the design of the accompanying optical system. Variations in tilt
angle within a device may result in apparent non-uniformities, such as line
pairing and image mottling, across the projected image. Variations in the
average tilt angle between devices may result in colorimetry and system contrast
variations. The specified limits represent the tolerances of the tilt angles
within a device.
(3) Conditions of
acceptance:
All DMD image quality returns
are
evaluated using the following projected image test conditions:
Test set degamma
should
be
linear.
Test set brightness and contrast
should
be set to
nominal.
The diagonal size of the projected image
should
be a minimum of 20
inches.
The projections screen
should
be 1X
gain.
The projected image
should
be inspected from a
38-inch
minimum viewing
distance.
The image
should
be in focus during all image quality
tests.
(4) Bright pixel definition: A single
pixel or mirror that is stuck in the ON position and is visibly brighter than
the surrounding pixels
(5) Gray 10 screen definition: All
areas of the screen are colored with the following settings:
Red = 10/255
Green = 10/255
Blue = 10/255
(6) POM definition: Rectangular
border of off-state mirrors surrounding the active area
(7) Dark pixel definition: A single
pixel or mirror that is stuck in the OFF position and is visibly darker than the
surrounding pixels
(8) Adjacent pixel definition: Two or
more stuck pixels sharing a common border or common point, also referred to as a
cluster
(9) Unstable pixel definition: 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.
See Section 6.9 for M and N specifications.