Hybrid alignment type liquid crystal display

Details Hybrid alignment type liquid crystal display Hybrid alignment type liquid crystal display

1996-10-11

1998-05-26

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349130, 349118, 349120, 349124, G02F 11335, G02F 11337

Patent

active

057574553

ABSTRACT:
A liquid crystal display which includes a pair of substrates, a liquid crystal layer sandwiched between the pair of substrates, and electrodes respectively formed on facing surfaces of the pair of substrates for applying an electric field to each pixel. A first alignment film is formed on the surface of one of the pair of substrates and covers the electrodes formed thereon. The first alignment film aligns the liquid crystal molecules in the liquid crystal layer in a direction generally vertical to a plane of the substrates. A second alignment film is formed on the surface of the other of the pair of substrates and covers the electrodes formed thereon. The second alignment film aligns the liquid crystal molecules in a direction generally parallel to the plane of the substrates and gives a pre-tilt to the liquid crystal molecules. An area corresponding to each pixel on the second alignment film is divided into a plurality of domains each having a single easy direction, and at least two domains in the pixel area have different easy directions. In addition, the easy directions of the two domains are different by 180 degrees, and the liquid crystal display also includes a pair of polarizers disposed outside of the pair of substrates such that polarizing axes of the pair of polarizers intersect at a right angle and such that an angle between each of the easy directions of the two domains and the polarizing axes of each polarizer is approximately 45 degrees.

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IBM Technical Disclosure Bulletin, vol. 36, No. 12, Dec., 1993, New York, US, pp. 547-548, XP000419062 "Symmetrical Multicolor Multi-Domain Homeotropic and Hybrid Oriented Nematic Liquid Crystal Displays Using periodic Triangular Tooth Waveform Surfaces".

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