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What causes white dots on the screen of my projector ?
Question from customers
Question from Giovanni U. :
White dots on your screen projector are due to the failure of the block LCD (Liquid Crystal Display). For an explanation, this block contains millions of pixels that form the LCD. In other words, pixels are composed of small compartments filled with liquid crystal. When the crystals are activated by a voltage source, these are aligned, passing the light from a white light source.
The "death" of a pixel is a main reason of failure of an LCD screen. When a pixel "dies", it usually results in a colored, black or solid white screen, which may, in some cases, be very unpleasant.
The white dots are called "hot pixels", that is to say, they are not dead, but they work badly: they don?t burn out completely and brightness is higher than average. On the other side, the "cold pixels" don?t light fully, therefore, with a lower brightness than average.
On my projector screen appear white spots, they blink, after they freeze. In addition, they multiply quickly. Is it the light or it is something else?
Answer from justprojectorlamps.co.uk
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