NEC Display Solutions of America, Inc.
NP3151W Installation Guide
Desktop and Ceiling Mount
v 1.1
www.necdisplay.com
NP3151W Page 4 of 11
Formulas
The Projection Formulas use the image width for calculation. Image height is the same for all aspect ratios, only horizontal image
size varies when using a 16:10 aspect ratio screen. 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 “W” for a 4:3 aspect ratio image in
the Projection Formulas.
Refer to the diagrams (page 5) and charts below for popular screen sizes 16:9 screens:
Projection Formulas:
Definitions:
NP01FL: C
=
0.995W
–
1.33
W
=
Image
Width
NP02ZL: C
(Wide) = 1.453W – 1.798 ------
C
(Tele) = 1.895W – 1.795
H = Image Height (size)
Standard:
C
(Wide) = 1.838W – 2.022 ------
C
(Tele) = 2.447W – 2.015
C = Throw distance
NP03ZL: C
(Wide) = 2.389W – 2.830 ------
C
(Tele) = 3.775W – 2.840
NP04ZL: C
(Wide) = 3.632W – 4.830 ------
C
(Tele) = 5.815W – 4.850
4:3
Screen
Formulas:
NP05ZL: C
(Wide) = 5.747W – 7.625 ------
C
(Tele) = 8.732W – 7.645
W = H x 4/3
H = W x 4/3
Screen
Diagonal
=
W
x
5/4
Note:
Tilting the front of the projector or down by more than 45° from level could reduce lamp life by up to 20%.
Distance Chart for popular 4:3 aspect ratios on a 16:9 screen
Note:
For screen sizes not indicated on the projection tables, use the formulas on page above.
Input Signal Aspect Ratio
4:3 image on a 16:9 screen
Rear Lens
NP01FL
Diagonal
Width(W)
Height (H)
Diagonal Width(W) Height (H)
0.8:1
inches
inches
inches
inches
inches
inches
inches
49
43
24
40
32
24
30
57 - 76
45 - 59
74 - 118
112
181
177
271
73
64
36
60
48
36
46
86 - 115
68 - 89
112 - 178
170 - 274
269 - 410
92
80
45
75
60
45
58
108 - 145
85 - 112
141 - 224
213 - 344
337 - 516
100
87
49
82
65
49
63
118 - 158
93 - 122
153 - 244
233 - 375
369 - 563
106
92
52
87
69
52
67
126 - 168
99 - 130
163 - 259
247 - 398
391 - 598
110
96
54
90
72
54
70
130 - 174
103 - 134
169 - 269
257 - 414
406 - 621
120
105
59
98
78
59
76
142 - 190
112 - 147
185 - 293
280 - 451
443 - 677
122
107
60
100
80
60
78
145 - 194
114 - 150
188 - 299
286 - 460
452 - 691
133
116
65
108
87
65
85
157 - 210
124 - 162
204 - 324
310 - 499
490 - 749
135
117
66
110
88
66
86
160 - 213
126 - 165
207 - 329
315 - 507
498 - 761
159
139
78
130
104
78
NA
189 - 252
149 - 195
246 - 390
373 - 600
590 - 901
161
140
79
132
105
79
NA
192 - 256
151 - 198
249 - 395
378 - 608
598 - 912
230
201
113
188
151
113
NA
275 - 367
217 - 284
357 - 566
543 - 871
858 - 1308
275
240
135
225
180
135
NA
329 - 438
260 - 339
427 - 677
650 - 1042
1027 - 1564
367
320
180
300
240
180
NA
439 - 585
347 - 452
571 - 903
868 - 1391
1372 - 2088
459
400
225
375
300
225
NA
550 - 732
435 - 566
714
1130
1086 - 1740
1716 - 2612
490
427
240
400
320
240
NA
587 - 781
464 - 604
762 - 1205
1159 - 1856
1831 - 2787
Screen Size (4:3)
inches
inches
NP02ZL
NP03ZL
NP04ZL
1.94 - 3.07:1
Zoom Lenses
Screen Size (16:9)
NP05ZL
4.62 - 7.02:1
inches
1.5 - 2.0:1
1.18 - 1.54:1
inches
inches
2.98 - 4.77:1
Standard
