DS005AKA Datasheet, PDF (7/12 Pages) Sony Corporation – Single-Panel Liquid Crystal Optical Engine for Rear Projectors

1. TV distortion
TV distortion is defined by the diagrams and formulas below.
A
y
DS005AKA
x
D
x
C
Right/left distortion = (4x)/(A + B)
Up/down distortion = (4y)/(C + D)
y
B
A
A'
x
D
D'
B'
B
y
C'
C
A' B' C' D': Points at the four corners of the
quadrangle where center pin is most
4x and 4y
apparent, and where the right/left
positions of A'D' and B'C' are symmetrical.
A'B' + C'D'
Where, A'B' ≥ AB/2, C'D' ≥ CD/2,
A'D' ≥ AD/2 and B'C' ≥ BC/2
A
B
x
A'
B'
4x and 4y
A'D' + B'C'
The same measurement method and
standard values are used for center
barrel.
D'
C'
y
D
C
2. Floating mechanism
The floating mechanism corrects image distortion between 40" and 50". At time of shipment, it is optimized for
a diagonal of 40" (including 2.0% underscan), but the floating mechanism should be adjusted if the projection
size is different and image distortion becomes prominent. Recommended values for different projection sizes
are given below, but adjustments should be made such that image distortion is minimized.
Recommended floating mechanism settings
Projection size (diagonal) [inch]
40
41
42
43
44
45
46
47
48
49
50
Recommended floating mechanism setting
–1.5
–1
–0.5
0
0.4
0.75
1.1
1.55
1.95
2.25
2.5
–7–