LCD device with an alignment mark having same material as microlenses
US5771085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133354
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide a liquid crystal display device and manufacturing method thereof for preventing a drop in the pixel slot opening and focus rates due to poor alignment precision of the drive substrate and microlens which face each other, and for improving the focus rate and production efficiency. A lens group comprised of a plurality of microlenses is integrated into the opposing substrate. A second alignment mark is formed at the desired position within the display area on the opposing substrate. This second alignment mark is formed along grooves between numerous protrusions having a semi-circular shaped cross section so the outer contours of the face form a cross shape of a specific width. These protrusions are made of the same material (for instance transparent plastic) and shape (semi-circular cross section) as those of the microlens at the display area, forming a lens shape. The second alignment mark is made together and simultaneously with the forming of the microlens in such a way that there is no deviation between the second alignment mark and the microlens opposite it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.