Liquid crystal display panels including alignment keys in the ac

Details Liquid crystal display panels including alignment keys in the ac Liquid crystal display panels including alignment keys in the ac

1998-03-17

1999-06-08

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 43, 257 59, G02F 11333

Patent

active

059108304

ABSTRACT:
Liquid crystal display (LCD) panels include an array of active regions that include a plurality of stacked patterned layers, and alignment keys in the active regions for use in aligning the stacked patterned layers. The stacked patterned layers are preferably formed using a plurality of exposure shots, and the alignment keys are preferably located at the center of the exposure shots or are symmetrically located with respect to the center of the exposure shots. The array of active regions preferably includes an array of pixels and the alignment keys are in the array of pixels. In a preferred embodiment, the array of pixels include red, blue and green pixels and the alignment keys are in the red pixels. In another preferred embodiment, the alignment keys are located in a semitransparent layer or a transparent layer in the stacked patterned layers. For example, one of the stacked patterned layers is an amorphous silicon layer and the alignment keys are included in the stacked amorphous layer.

REFERENCES:
patent: 5771085 (1998-06-01), Ochi et al.
O'Mara, "Liquid Crystal Flat Panel Displays Manufacturing Science & Technology", Van Nostrand Reinhold, 1993, pp. 160-162.

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