P401W/P451W Installation Guide
Ceiling Mounted and Desktop
Product Description, Lens Specs, Notes and Formulas
Diagrams & Distance Charts
Ceiling Mount Dimensions
Input Panel and Control Codes
3 panel LCD projector,
0.59" p-Si TFT w/MLA
1280 x 800
P401W: 36 dB / 29dB @ 1 meter
P451W: 37 dB / 30dB @ 1 meter
Power Consumption: P401W : 325W (max)
P451W : 357W (max)
1.3 – 2.2:1 (for 100" diagonal)
4.8° - 8.0° (for 100" diagonal)
25" - 300" diagonal (4:3)
For screen sizes not indicated on the projection tables, use the formulas below.
If the figures on the tables do not match the results of formulas, use the figures in the table.
All calculations are based on a 4:3 aspect ratio.
Distances are in inches, for millimeters multiply by 25.4.
Distances may vary 5%.
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:
W = Image Width
H = Image Height (size)
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and screen top
(screen bottom for desktop application)
B = 0.188W
C (wide) = 1.36W – 1.68
C (tele) = 2.26W – 1.68
D = -0.125W
α (wide) = tanˉ¹ (B/C(wide))
α (tele) = tanˉ¹ (B/C(tele))
NEC Display Solutions of America, Inc.
Dimensions: 15.7" (W) x 4.5" (H) x 11.1" (D)
P401W: 4000 Lumens
P451W : 4500 Lumens
P401W : 1109 BTU/hour
P451W : 1218 BTU/hour
17.4mm – 29.0mm
1.7 - 2.0
Manual Focus/Manual Zoom
4:3 Screen Formulas:
W = H x 16/10
H = W x 10/16
Screen Diagonal = W x 18.868/16
Page 1 of 6