投影机尺寸定律（Projector size law）.docVIP

投影机尺寸定律（Projector size law） Projector size calculation method In the purchase of the projector, we first noticed the projector brightness, resolution, contrast, uniformity and other important parameters, in addition, we should also make clear the focal length and liquid crystal projector parameters such as size, suitable for use in the field to our projection distance and screen size, screen size and projection distance is closely related with the the focal length and liquid crystal projector dimensions, following their relationship: Projection distance is obtained for known picture sizes: Minimum projection distance (m) = minimum focal length (m) x screen size (inch), crystal size (inch) The maximum projection distance (m) = maximum focal length (m) x screen size (inch), crystal size (inch) Known projection distance gives the picture size: The maximum projection screen projection distance (m) = (m) x liquid crystal size (inch), minimum focal length (m) Minimum projection screen projection distance (m) = (m) x liquid crystal size (inch), maximum focal length (m) Such as: The focal length of Toshiba TLP-S71 is 26.5mm~31.5mm, and the size of the LCD is 0.7 inches LCD board. It needs 85 inch picture Minimum projection distance (m) =0.0265 m x 85 inch / 0.7 inch = 3.217 meters The maximum projection distance (m) =0.0315 m x 85 inch / 0.7 inch = 3.825 meters 2, known: EPSON EMP-6000 focal length is 24 - 38.2 mm, the LCD chip size is 0.8 inches LCD board, the projection distance is 4 meters, request: the biggest projection picture and the smallest projection picture. The maximum projection screen (0.8 inches x inches) =4 meters, 0.024 meters = 133.3 inches Minimum projection screen (0.8 inches x inches) =4 meters, 0.0382 meters = 83 inches As mentioned above, the size of the projection screen, we need to choose the size of the projection screen according to the size of the projection screen. The screen size we are talking about now is actually the length of the diagonal o