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§ Transmissive Displays
We briefly show a LCD projector using three transmissive poly-silicon thin-film-transistor ( TFT ) panels.
The incoming white light from a lamp is divided into three channels by dichroic mirrors. In each channel, a LCD panel is sandwiched between two linear polarizers.
The 90°-TN and Vertical Aligned ( VA ) cells are popular in choice, because TN cell has weak wavelength dependency, meanwhile VA cell has an un-precedented contrast ratio ( ＞ 1000 : 1 ).
In case of the X-cube, RGB beams are re-combined, the reflective lens is projected into the images on a screen.
