ApplicationNo. 11902623 filed on 09/24/2007
US Classes:349/118With refractive indices in the x, y, and z directions
ExaminersPrimary: Pak, Sung H
Assistant: Wong, Eric
Attorney, Agent or Firm
Foreign Patent References
International ClassG02F 1/1335
AbstractThe invention provides a retardation control element capable of inhibiting a retardation defect that becomes a cause of light leakage and color shift of a liquid crystal display device from occurring, a method of producing the same, and a liquid crystal display device including such a retardation control element. A method of producing a retardation control element includes: a first step of filtering liquid crystal ink containing crosslinkable liquid crystal molecules with a filter material having a maximum pore diameter in the range of 0.1 to 5 μm; a second step of coating the filtered liquid crystal ink in a thin film on a revolving light-transmitting base material by means of a spin coating method; a third step of, after drying the base material under reduced pressure as needs arise, heating the coated liquid crystal ink to a liquid crystal phase temperature to align the crosslinkable liquid crystal molecules; and a fourth step of photo-polymerizing the aligned crosslinkable liquid crystal molecules each other to form a birefringence functional layer, wherein the second step is carried out with the base material covered with a tight cover.