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Fixed-frame screens provide the greatest level of uniform tension on the screens surface, resulting in the optimal image quality. They are often used in home theater and professional environments where the screen does not need to be recessed into the case.
The figure shows a sketch of how different technologies present a single white/grey frame. Time and intensity is not to scale. Notice that some have a fixed intensity, while the illuminated period is variable. This is a kind of pulse-width modulation. Others can vary the actual intensity in response to the input signal.
Fixed pixel displays are display technologies such as LCD and plasma that use an unfluctuating matrix of pixels with a set number of pixels in each row and column. [ 1 ] [ 2 ] With such displays, adjusting ( scaling ) to different aspect ratios because of different input signals requires complex processing.
Screen-door effects are more noticeable than LCD when up close, or on larger sizes. [58] New models are no longer produced. Colored sub-pixels may age at different rates, leading to a color shift, although some models will scan pixels to even out wear and prevent this shift. [59] Sensitive to UV light from direct sunlight.
Even so, the best image quality is found using a blank white, grey, or black [citation needed] (which blocks reflected ambient light) surface, so dedicated projection screens are often used. Perceived color in a projected image is a factor of both projection surface and projector quality.
We found the best outdoor projector for movies at home by analyzing reviews and specs like moisture resistance, picture acoustics quality, and adjustability.
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