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The LCDs built in projection systems are typically small reflective or transmissive panels lit by a powerful arc lamp source. A number of lenses enlarges the reflected or transmitted image and sends it on a screen. For front-projection systems the LCD is situated on the side of the screen as the viewer, although in rear-projection systems the screen is set off from behind. Projectors of more expense and capacity may use three separate LCD panels, creating separate red, green, and blue images that combine to form a coloured display on the screen.

The growth in demand for film displays has placed a growth in emphasis on the switching speed of liquid crystals. This has required the creation of objects build with smectic liquid crystals, certain types of which emit a faster electro-optical response than nematic liquid crystals. The surface-stabilized ferroelectric liquid crystal (SSFLC) display is in the current day the most developed smectic device. Within it the liquid crystal molecules are cast in layers that are perpendicular to the substrate planes, which are distanced by one or two micrometres, and throughout the layers the molecules are on a slant, as demonstrated in the figure. The host liquid crystal contains optically active molecules, and a subtle result of the optical activity and the shape of the molecules is the appearance of a permanent charge separation, or ferroelectric dipole, comparable to the ferromagnetic dipole of a magnet. The direction of this dipole is perpendicular to the tilt direction of the molecules and throughout the plane of the layers. Hence, there must be a permanent charge separation throughout the liquid crystal layer in the SSFLC, and its sign is directly partnered to the tilt direction of the molecules. An applied voltage of the corresponding sign can reverse the direction of this dipole in tens of microseconds and in so doing reverse the tilt direction of the molecules. The resultant change in optical properties can make a change from light to dark when one or more polarizers are utilised.

SSFLC devices have been produced for larger passive-matrix displays, but their expensiveness and complex nature has impeded them from creating any significant movement on the market. Small transmissive and reflective active-matrix SSFLC displays, however, have shown some probability for use as parts in projection systems or as viewfinders in digital cameras. Their immediate reaction allows them to be utilised in time-sequential colour systems, in which dear colour filters are replaced with a coloured backlight that flashes red, green, and blue in fast pulsing (around 100 cycles per second). For example, the liquid crystal may be switched to a transmissive state between the red and green periods and to a nontransmissive state for the blue period, having the outcome that the eye sees an average of red and green light, or the colour yellow.

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