NEC Display Solutions of America, Inc.
V332X/V332W/V302H Installation Guide
Ceiling Mounted and Desktop
Rev 1.0
www.necdisplay.com
V332X/V332W/V302H
Page 2 of 9
Formulas
The Projection Formulas use the image width for calculation. For proper projection placement, determine the image width
for the desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the width for “W” in
the Projection Formulas.
Refer to the diagrams and charts for popular screen sizes on page 2:
Definitions:
4:3 Screen Formulas:
W = Image Width
W = H x 4/3
H = Image Height (size)
H = W x 3/4
B = Vertical distance between lens center and screen center
Screen Diagonal = W x 5/4
C = Throw distance
D = Vertical distance between lens center and screen top
(screen bottom for desktop application)
Projection Formulas:
B
= 0.487W
C
(wide) = 1.949W
C
(tele)
= 2.150W
D
= 0.112W
α
(wide) = tanˉ¹ (B/C(wide))
α
(tele) = tanˉ¹ (B/C(tele))
Distance Chart for popular 4:3 screens
Note:
For screen sizes not indicated on the
projection tables, use the formulas on page 1.
Diagonal Width(W) Height (H)
inches
inches
inches
inches
30
24
18
12
47
-
52
14.0 -
12.8
40
32
24
16
62
-
69
14.0 -
12.8
60
48
36
23
94
- 103
14.0 -
12.8
68
54
40.5
26
105
- 116
14.0 -
12.8
73
58
43.5
28
113
- 125
14.0 -
12.8
84
67
50.25
33
131
- 144
14.0 -
12.8
90
72
54
35
140
- 155
14.0 -
12.8
100
80
60
39
156
- 172
14.0 -
12.8
120
96
72
47
187
- 206
14.0 -
12.8
175
140
105
68
273
- 301
14.0 -
12.8
180
144
108
70
281
- 310
14.0 -
12.8
210
168
126
82
327
- 361
14.0 -
12.8
240
192
144
94
374
- 413
14.0 -
12.8
9
16
19
22
degrees
D
3
8
8
Screen Size (4:3)
4
inches
B
C
w ide - tele
inches
11
16
5
6
6
α
w ide - tele
