NEC Display Solutions of America, Inc.
P474W/P474U/P554W/P554U Installation Guide
Desktop and Ceiling Mount Rev 1.0
www.necdisplay.com P474W/P474U/P554W/P554U Page 3 of 9
Formulas: 16:10 Aspect Ratio (P474U/P554U—WUXGA)
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) = 1.238W – 1.818
C (tele) = 1.999W – 1.727
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.
Diagonal Width(W) Height (H)
57 48 30 17 - 0 58 - 94 -2 - 15 16.1 - 10.0 7.2 - -7.2
66 56 35 19 - 0 68 - 110 -2 - 18 16.1 - 10.0 8 - -8
68 58 36 20 - 0 69 - 113 -2 - 18 16.0 - 10.0 9 - -9
75 64 40 22 - 0 77 - 126 -2 - 20 16.0 - 10.0 10 - -10
79 67 42 23 - 0 81 - 133 -2 - 21 16.0 - 10.0 10 - -10
85 72 45 25 - 0 87 - 142 -3 - 23 16.0 - 10.0 11 - -11
92 78 49 27 - 0 95 - 155 -3 - 25 15.9 - 10.0 12 - -12
98 83 52 29 - 0 101 - 165 -3 - 26 15.9 - 9.9 12 - -12
102 86 54 30 - 0 105 - 171 -3 - 27 15.9 - 9.9 13 - -13
111 94 59 33 - 0 115 - 187 -3 - 30 15.9 - 9.9 14 - -14
113 96 60 33 - 0 117 - 190 -3 - 30 15.9 - 9.9 14 - -14
123 104 65 36 - 0 127 - 206 -4 - 33 15.9 - 9.9 16 - -16
125 106 66 37 - 0 129 - 209 -4 - 33 15.9 - 9.9 16 - -16
147 125 78 43 - 0 153 - 248 -4 - 39 15.8 - 9.9 19 - -19
149 126 79 44 - 0 155 - 251 -4 - 40 15.8 - 9.9 19 - -19
213 181 113 63 - 0 222 - 360 -6 - 57 15.8 - 9.9 27 - -27
255 216 135 75 - 0 266 - 430 -8 - 68 15.8 - 9.9 32 - -32
270 229 143 79 - 0 281 - 456 -8 - 72 15.8 - 9.9 34 - -34
300 254 159 88 - 0 313 - 507 -9 - 80 15.7 - 9.9 38 - -38
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