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P474W/P474U/P554W/P554U Installation Guide
Desktop and Ceiling Mount
Formulas: 16:10 Aspect Ratio (P474W/P554W—WXGA)
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) = 1.263W – 3.138
C (tele) = 2.264W – 3.138
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
57
66
68
75
79
85
92
98
102
111
113
123
125
147
149
213
255
270
300
www.necdisplay.com
B
max - min
inches
inches
inches
48
30
17
-
0
56
35
19
-
0
58
36
20
-
0
64
40
22
-
0
67
42
23
-
0
72
45
25
-
0
78
49
27
-
0
83
52
29
-
0
86
54
30
-
0
94
59
33
-
0
96
60
33
-
0
104
65
36
-
0
106
66
37
-
0
125
78
43
-
0
126
79
44
-
0
181
113
63
-
0
216
135
75
-
0
229
143
79
-
0
254
159
88
-
0
P474W/P474U/P554W/P554U
NEC Display Solutions of America, Inc.
C
D
w ide - tele
max - min
w ide - tele
inches
inches
57
-
106
-2
-
15
16.2
68
-
124
-2
-
18
16.0
70
-
127
-2
-
18
16.0
78
-
142
-2
-
20
16.0
82
-
149
-2
-
21
15.9
88
-
160
-3
-
23
15.9
96
-
174
-3
-
25
15.8
102
-
185
-3
-
26
15.8
106
-
192
-3
-
27
15.8
116
-
211
-3
-
30
15.8
118
-
214
-3
-
30
15.8
128
-
232
-4
-
33
15.7
130
-
236
-4
-
33
15.7
154
-
279
-4
-
39
15.7
157
-
283
-4
-
40
15.7
225
-
406
-6
-
57
15.6
270
-
486
-8
-
68
15.5
286
-
515
-8
-
72
15.5
318
-
573
-9
-
80
15.5
Lens Shift
α
Max
Max
(Right)
(Left)
degrees
inches
-
9.0
7.2
-
-7.2
-
8.9
8
-
-8
-
8.9
9
-
-9
-
8.9
10
-
-10
-
8.9
10
-
-10
-
8.9
11
-
-11
-
8.9
12
-
-12
-
8.9
12
-
-12
-
8.9
13
-
-13
-
8.8
14
-
-14
-
8.8
14
-
-14
-
8.8
16
-
-16
-
8.8
16
-
-16
-
8.8
19
-
-19
-
8.8
19
-
-19
-
8.8
27
-
-27
-
8.8
32
-
-32
-
8.8
34
-
-34
-
8.8
38
-
-38
Rev 1.0
Page 2 of 9
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