摘要:
A (VA) liquid crystal display has: a liquid crystal layer (3) interposed between a first substrate (110) and a second substrate (210); the substrates (110,210) are disposed between a first polarizer (15) and a second polarizer (25); a color filter (230) is disposed on one of the two substrates (110); and a biaxial compensation film (22), with an in- plane phase retardation R0 from about 45nm to about 75nm and a thickness direction phase retardation Rth from about 250nm to about 310nm, is disposed between a polariser (25) and a substrate (210) to improve the contrast ratio. A film (12), with an in- plane phase retardation R0 from about -10nm to about 10nm and a thickness direction phase retardation Rth from about -10nm to about 10nm, which can be disposed between the first polariser (15) and the first substrate (110) on the other side does not contribute to the phase difference and may also be removed.
摘要:
A retardation compensation element (56) is composed of a C-plate (85) and an 0-plate (86). The O-plate (86) is a biaxial birefringent medium made of an obliquely deposited organic material. A fast axis (L6) of the 0-plate (86) is parallel to the orthographic projection of a deposition direction (96) onto the surface of the O-plate (86). Between a liquid crystal display device (51) and a polarization beam splitter (48), the O-plate (86) is arranged such that the fast axis (L6) and a tilt direction (L8) of liquid crystal molecules (75) are parallel to each other, and that the deposition direction (96) and the tilt direction (L8) face the opposite direction with respect to a Z2 axis. The C-plate (86) is disposed together with the O-plate (85) between the liquid crystal display device (51) and the polarization beam splitter (48).
摘要:
A display is provided for switching between a narrow or private viewing mode and a wide or public viewing mode. The display comprises a display device (1) which is controlled to provide display of a desired image or sequence of images. This is associated with a liquid crystal device (4) having at least one liquid crystal layer (15, 18, 19, 20) whose molecules are switchable between a first state providing a first angular viewing range (7) and a second state providing a second angular viewing range (8) which is within and smaller than the first angular viewing range (7). With the molecules in the second state, the device (4) at least partially blocks light propagating towards part of the first angular viewing range (7) outside the second angular viewing range (8). The or each liquid crystal layer (15, 18, 19, 20) is in contact with at least one alignment surface (15b, 15c, 18b, 18c, 19b, 19c, 20b, 20c), the or each of which comprises a uniform non-patterned alignment surface.
摘要:
An inexpensive polyimide-free alignment layer comprising a mixture of an epoxy and a reactive liquid crystal material is used for fabricating liquid crystal displays (LCDs). The alignment layer can be cast onto a previously aligned layer, without destroying the alignment of the underlying layer, thus allowing for monolithic fabrication of compensator stacks, without film transfer lamination.