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P474W/P474U/P554W/P554U Installation Guide
6647W/6647WU/6655W/6655WU Installation Guide
Desktop and Ceiling Mount
Desktop and Ceiling Mount
Formulas: 16:10 Aspect Ratio (6647WU/6655WU—WUXGA)
The Projection Formulas use the image width for calculation. Image width is the same for all aspect ratios, only vertical image size
varies. For proper projector placement, determine the image width for a desired screen size. Use the Screen Formulas below to
calculate all screen dimensions. Plug in the image width for "W" in the Projection Formulas.
Refer to the diagrams and charts for popular screen sizes on page 4:
16:10 Screen Formulas:
W = H x 16/10
H = W x 10/16
Screen Diagonal = W x 18.868/16
Projection Formulas:
B (max) = 0.347W
B (min) = 0
C (wide) = 1.238W – 1.818
C (tele) = 1.999W – 1.727
D (max) = -0.053W
D (min) = 0.313W
α (wide) = tanˉ¹ (B/C(wide))
α (tele) = tanˉ¹ (B/C(tele))
Lens Shift Max (Right) = 0.15W
Lens Shift Max (Left) = 0.-15W
Note:
For screen sizes not indicated on the projection
tables, use the formulas on page 1.
Distance Charts
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.
Distances are in inches. For millimeters multiply by 25.4.
Screen Size (16:10)
Diagonal Width(W) Height (H)
inches
inches
57
48
66
56
68
58
75
64
79
67
85
72
92
78
98
83
102
86
111
94
113
96
123
104
125
106
147
125
149
126
213
181
255
216
270
229
300
254
www.necdisplay.com
www.dukaneav.com
B
C
max - min
w ide - tele
inches
inches
inches
30
17
-
0
58
-
35
19
-
0
68
-
36
20
-
0
69
-
40
22
-
0
77
-
42
23
-
0
81
-
45
25
-
0
87
-
49
27
-
0
95
-
52
29
-
0
101
-
54
30
-
0
105
-
59
33
-
0
115
-
60
33
-
0
117
-
65
36
-
0
127
-
66
37
-
0
129
-
78
43
-
0
153
-
79
44
-
0
155
-
113
63
-
0
222
-
135
75
-
0
266
-
143
79
-
0
281
-
159
88
-
0
313
-
P474W/P474U/P554W/P554U
6647W/6647WU/6655W/6655WU_Installation_Guide-00
NEC Display Solutions of America, Inc.
D
α
max - min
w ide - tele
inches
degrees
94
-2
-
15
16.1
-
10.0
110
-2
-
18
16.1
-
10.0
113
-2
-
18
16.0
-
10.0
126
-2
-
20
16.0
-
10.0
133
-2
-
21
16.0
-
10.0
142
-3
-
23
16.0
-
10.0
155
-3
-
25
15.9
-
10.0
165
-3
-
26
15.9
-
9.9
171
-3
-
27
15.9
-
9.9
187
-3
-
30
15.9
-
9.9
190
-3
-
30
15.9
-
9.9
206
-4
-
33
15.9
-
9.9
209
-4
-
33
15.9
-
9.9
248
-4
-
39
15.8
-
9.9
251
-4
-
40
15.8
-
9.9
360
-6
-
57
15.8
-
9.9
430
-8
-
68
15.8
-
9.9
456
-8
-
72
15.8
-
9.9
507
-9
-
80
15.7
-
9.9
Dukane AV Division
Lens Shift
Max
Max
(Right)
(Left)
inches
7.2
-
-7.2
8
-
-8
9
-
-9
10
-
-10
10
-
-10
11
-
-11
12
-
-12
12
-
-12
13
-
-13
14
-
-14
14
-
-14
16
-
-16
16
-
-16
19
-
-19
19
-
-19
27
-
-27
32
-
-32
34
-
-34
38
-
-38
Rev 1.0
Rev 1.0
Page 3 of 9
Page 3 of 9
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