Striating liquid crystal display substrates with ultrasonically cavitating bubble beams
Method and apparatus for injecting liquid into display device cell
Method of manufacturing polymer dispersed liquid crystal display devices
Process for producing liquid crystal including discharging liquid crystal material through second aperture Patent #: 5835181
ApplicationNo. 09967938 filed on 10/02/2001
US Classes:349/187, NOMINAL MANUFACTURING METHODS OR POST MANUFACTURING PROCESSING OF LIQUID CRYSTAL CELL349/189, Injecting liquid crystal349/190, Sealing of liquid crystal349/124, Formed by particular technique (e.g., Langmuir Blodgett, stretching, etc.)141/7, With evacuation of container349/93Having UV polymerized element
ExaminersPrimary: Chowdhury, Tarifur R.
Attorney, Agent or Firm
Foreign Patent References
International ClassesG02F 113
AbstractFirst, 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 generated, hence the speed of the liquid crystal injection is increased.