LCD displays utilize two sheets of polarizing material with a liquid crystal solution between them. An electric current passed through the liquid causes the crystals to align so that light cannot pass through them as seen with medical grade monitors. LCD display utilizes electric charges to twist and untwist liquid crystals which cause them to block light and therefore emit blacks.

Note that LCD’s use maximum power while displaying a very dark or black image. LCD displays should NOT be used to confirm contrast, color, exposure, or any other critical factors.

LCD displays have been used in a wide variety of electronic devices and best viewed in a Planar LCD displays. LCD displays consist primarily of two sheets of polarized glass plates with some liquid crystal solution trapped between them. The type of liquid crystals used in LCD panels have got very specific properties that enable them to serve as effective ’shutters’ that close or open to block or otherwise, the passage of light.

Liquid crystal molecules respond faster to the high voltage that’s needed for black-white transitions than to the low voltage that’s needed for transitions between gray areas as in monochrome monitors. Therefore, even though going from one grayscale level to another is less of a jump than going from black to white, the gray-to-gray transition time can actually take longer. Liquid crystal displays are formed by integrating a number of such cells, or more usually, by using a single liquid crystal plate and a pattern of electrodes.

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