NEC Display Solutions of America, Inc.
PH2601QL & PH3501QL Installation Guide
Desktop and Ceiling Mount Rev 1.0
www.necdisplay.com PH2601QL/PH3501QL Page 3 of 11
Formulas: 16:9 Aspect Ratio (UHD = 3840x2160)
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 2 and 3:
Projection Formulas: Definitions: 16:9 Screen Formulas
L2K-10F1: C(Wide) = 0.999W – 3.988 W = Image Width W = H x 16/9
L4K-11ZM: C(Wide) = 1.343W – 4.327 ------ C(Tele) = 1.854W – 3.937 H = Image Height (size) H = W x 9/16
L4K-15ZM: C(Wide) = 1.632W – 4.382 ------ C(Tele) = 2.257W – 3.488 C = Throw distance Screen Diagonal = W x 18.378/16
L4K-20ZM: C(Wide) = 2.089W + 10.012 ------ C(Tele) = 3.550W + 10.488
L2K-30ZM: C(Wide) = 2.917W + 9.189 ------ C(Tele) = 4.219W + 12.358
L2K-43ZM1: C(Wide) = 4.201W - 11.906 ------ C(Tele) = 5.929W – 15.831
L2K-55ZM1: C(Wide) = 5.363W - 13.520 ------ C(Tele) = 8.393W – 17.862
Distance Chart for popular 16:9 Screens (UHD = 3840x2160)
110 96 54 91.7 - N/A 124.3 - 173.6 151.9 - 212.7 210.1 - 350.5 270.2 - 391.68 390.4 - 551.97 500.1 - 785.91
131 114 64 109.9 - N/A 148.8 - 207.5 181.7 - 253.9 248.3 - 415.4 323.5 - 468.82 467.2 - 660.37 598.1 - 939.35
161 140 79 136.0 - N/A 183.9 - 255.9 224.4 - 312.9 302.8 - 508.1 399.7 - 579.01 576.9 - 815.22 738.2 - 1158.6
192 167 94 163.0 - N/A 220.2 - 306.0 268.4 - 373.8 359.2 - 603.9 478.4 - 692.87 690.3 - 975.24 882.9 - 1385.1
226 197 111 192.6 - N/A 259.9 - 360.9 316.7 - 440.6 421.0 - 709.0 564.8 - 817.76 814.7 - 1150.7 1041.7 - 1633.5
259 225 127 221.3 - N/A 298.5 - 414.1 363.6 - 505.4 481.1 - 811.0 648.6 - 938.97 935.4 - 1321.1 1195.8 - 1874.7
292 254 143 250.0 - N/A 337.1 - 467.4 410.5 - 570.3 541.1 - 913.0 732.4 - 1060.2 1056.1 - 1491.4 1349.8 - 2115.8
324 282 159 277.8 - N/A 374.5 - 519.0 456.0 - 633.2 599.3 - 1011.9 813.6 - 1177.7 1173.1 - 1656.6 1499.3 - 2349.6
400 348 196 343.9 - N/A 463.4 - 641.7 563.9 - 782.5 737.5 - 1246.7 1006.6 - 1456.9 1451.1 - 2048.9 1854.1 - 2904.9
500 435 245 430.9 - N/A 580.3 - 803.1 706.0 - 979.0 919.4 - 1555.8 1260.6 - 1824.2 1816.8 - 2565.1 2321.0 - 3635.6