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1) LCD Projector Works Q & A: LCD projector There are three parts: LCD, optical system, the electronic circuitry. LCD projector Bulb Issued by bright white light, through the optical system of the spectroscope, the white light is decomposed into RGB (red, green, blue) three colors of light. Circuit system according to the image source of the image signal generation LCD control signal, precise control of liquid crystal action. Liquid crystal is between the range of liquid and solid material, itself does not light, liquid crystal projector using the photoelectric effect, that the arrangement of liquid crystal molecules changes in the electric field, affecting the LCD unit transmittance or reflection rate. RGB three kinds of light in the exact position through the LCD, through the projector Shot Projected onto the screen to form the colorful image. (B) how to select the right projector Projector is a Big screen The display device, brightness, resolution, contrast, uniformity and other important parameters directly determine the projector display is good or bad, in general, the higher the projector parameters show the better, but the price is also higher. In the actual selection of which, in the practical, the principle of sufficient and comprehensive consideration of environmental factors, the price of general conclusions derived factors: relatively large area (150 square meters and above) where you can select the high-brightness (3500ANSI lumens more ) machines, an area of moderate (50-150 square meters) where you can choose the general brightness (2000ANSI lumens or so) of the machine, smaller size (20-50 square meters) where you can choose low-intensity (2000ANSI lumens or less) and low resolution (800 * 600) of the machine. (C) of the projection distance and projection Foot Inch between the conversion formula: Minimum projection distance (m) = the minimum focal length (m) x Screen Size (inches) ÷ LCD chip size (inch) Maximum projection distance (m) = maximum focal length (m) x Screen Size (inches) ÷ LCD chip size (inch) Largest projection screen (m) = projection distance (m) x LCD chip size (inches) ÷ minimum focal length (m) Minimum projection screen (m) = projection distance (m) x LCD chip size (inches) ÷ maximum focal length (m) Example: (1), is known: E PS ON EMP-820's focal length is 28. 3mm ~ 37. 98mm, LCD chip size is 0.9 inches LCD Board, and 72-inch screen. Requirements: Minimum projection distance and the maximum projection distance. Minimum projection distance (m) = 0.0283 m x 72 ÷ 0. 9 inch = 2.264 meters Maximum projection distance (m) = 0.03798 m x 72 ÷ 0. 9 inch = 3.0384 m (2), are known: EPSON EMP-8300's focal length is 53mm ~ 72mm, LCD chip size is 1.4 inches LCD panel, projection distance of 5 meters, Demand: the biggest and the smallest projection screen projection screen. Largest projection screen (inches) = 5 m x 1. 4 ÷ 0. 053 meter = 132 inches Minimum projection screen (inches) = 5 m x 1. 4 ÷ 0. 072 meter = 97 inches (D) General screen (4:3 ratio) the width and height calculation formula: (1 inch = 2.54 cm = 0.0254 m) We are talking about the actual size of the screen diagonal screen length, in units of inch, common screen width and height ratio of 4:3, was obtained by the Pythagorean theorem: Screen width (m) = screen size (inch) x 0. 0254 m / inch x 0. 8 = screen size ÷ 50 Screen height (m) = Screen size (inches) x 0. 0254 m / inch x 0. 6 = screen size ÷ 66 Get in meters And so the formula, the 150-inch screen with a width of 150 ÷ 50 = 3 (m) height of 150 ÷ 66 = 2. 27 (m) 200-inch screen with a width of 200 ÷ 50 = 4 We are high quality suppliers, our products such as key cutting machine Manufacturer , China transponder key programmer for oversee buyer. To know more, please visits automotive key cutting machine.
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