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Maintenance knowledge of LCD high voltage board

2013-09-22
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The working principle of liquid crystal display: Liquid crystal is a special substance between solid and liquid. It is an organic compound that is liquid under normal conditions, but its molecular arrangement is very regular like solid crystals, hence the name liquid crystal. Another special property of it is that if an electric field is applied to the liquid crystal, its molecular arrangement will change. At this time, if it is matched with a polarizing plate, it will have the effect of preventing light from passing through (when no electric field is applied, light can pass through smoothly). If it is combined with a color filter and the voltage applied to the liquid crystal is changed, the amount of light transmittance of a certain color can be changed. It can also be figuratively said that changing the voltage across the liquid crystal can change its transmittance (but in reality this must be combined with a polarizing plate).

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