Apparatus for injecting liquid crystal materials and methods for manufacturing liquid crystal panels by using the same
US6844908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2001 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1341
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
First, a completed liquid crystal cell made by adhering two substrates with a sealant is loaded into a liquid crystal injection chamber, and then the liquid crystal injection chamber forms a high vacuum by evacuating much of the air from the chamber. The injection hole of the sealant is completely immersed in the liquid crystal material. At this time, the interior of the liquid crystal cell enclosed by the sealant is under high vacuum. Next, non-active gas is injected into the interior of the liquid crystal injection chamber, and then the vacuum in the interior of the chamber is reduced or it is allowed to return to atmospheric pressure. Then, because the interior of the liquid crystal injection chamber is at low vacuum or at atmospheric pressure and the interior of the liquid crystal cell enclosed by the sealant is at high vacuum, the liquid crystal material is injected into the interior of the liquid crystal cell enclosed by the sealant. If ultrasonic waves are applied to the liquid crystal material through the ultrasonic wave generator, cavities are formed in the liquid crystal material. As a result of the asymmetric collapse of the cavity bubbles, additional pressure is generat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.