Optical alignment apparatus
AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorsYongchao ZHAO, Chungching HSIEH
Life of this patent
Estimating the term…
Abstract
An optical alignment apparatus is provided. The optical alignment includes a machine table and an alignment light source, a polarizer and a twisted nematic liquid crystal display for regulating the polarization direction of the alignment light. The advantage of the optical alignment apparatus of the present invention is that the polarization direction of the alignment light can be adjusted according to the alignment requirements, so that the alignment films having the different alignment requirements can be aligned without rotating the substrate.
Claims17
An optical alignment apparatus, comprising:
- a machine table on which a to-be-aligned substrate is conveyed, and above which is provided with:
- an alignment light source for emitting alignment light;
- a polarizer positioned below the alignment light source so that incident light is transformed into polarized light and is emitted;
- a twisted nematic liquid crystal display positioned below the polarizer for controlling a polarization direction of transmitted light, wherein the twisted nematic liquid crystal display includes:
- an upper substrate provided with a common electrode layer on a lower surface of the upper substrate;
- a lower substrate disposed opposite the upper substrate, wherein an upper surface of the lower substrate is provided with a thin film transistor array and a pixel electrode layer;
- and
- a liquid crystal layer sandwiched between the upper substrate and the lower substrate;
- a light-guiding plate horizontally disposed, wherein a side of the light-guiding plate is a light-entry surface, a light-emitting surface of the alignment light source is disposed close to the light-entry surface of the light-guiding plate, a lower surface of the light-guiding plate is a light-exit surface, and a light-exit surface is positioned above the polarizer and parallel to the polarizer.
An optical alignment apparatus, comprising:
- a machine table on which a to-be-aligned substrate is conveyed, and above which is provided with:
- an alignment light source for emitting alignment light;
- a polarizer positioned below the alignment light source so that incident light is transformed into polarized light and is emitted;
- a twisted nematic liquid crystal display positioned below the polarizer for controlling a polarization direction of transmitted light, wherein the twisted nematic liquid crystal display includes:
- an upper substrate provided with a common electrode layer on a lower surface of the upper substrate;
- a lower substrate disposed opposite the upper substrate, wherein an upper surface of the lower substrate is provided with a thin film transistor array and a pixel electrode layer;
- and
- a liquid crystal layer sandwiched between the upper substrate and the lower substrate.
Dependencies are inferred from the claim text.