NEC V332X - Page 2

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