Patent · US Expired

Liquid crystal display device with reflective material that hides switching material

US7009668B2 · kind B2 · utility

10Cited by
12References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 28, 2003
Grant dateMar 7, 2006
Priority date—
Expiry dateApr 12, 2024

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02F1/133533
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

In a method of manufacturing a liquid crystal device including a layer having a fixed cholesteric order, the patterned layer is manufactured by providing a layer comprising polymerizable cholesterically ordered material and a compound convertible by means of radiation from a non-converted to converted state. The pitch of the cholesterically ordered material is influenced by the compound in its converted state to a different extent than in its converted state. The polymerizable layer is then irradiated pattern-wise thus creating regions of different pitch. The irradiated layer is then polymerized and/or cross-linked to fix the cholesteric order thus obtained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.