Patent ID: 11921371
Assignee: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 22:
23. A liquid crystal display device comprising:
a reflective or transflective liquid crystal cell including liquid crystal molecules aligned in a planar or vertical manner, said liquid crystal cell being formed of a transparent front substrate located on the side of an observer, and a transparent rear substrate which extends beneath, parallel to, and at a distance from the front substrate, said two front and rear substrates being joined to each other with a sealing frame which defines a sealed enclosure in which a liquid crystal composition is confined, the front and rear substrates being coated on opposite faces thereof with electrically conductive transparent electrodes and counter-electrodes, optical properties of the liquid crystal composition being modified by application of an electric field at a point of intersection between an electrode and a corresponding counter-electrode, the liquid crystal display device being provided with a reflective polarizing film to absorb a first component of light which enters the liquid crystal cell through the front substrate, and to reflect a second component of light polarized in a direction orthogonal to that of the first component,
wherein the reflective polarizing film includes relief portions visible to an observer through the front substrate of the liquid crystal cell,
wherein a transparent levelling layer is provided in hollows on an upper face of the reflective polarizing film, an upper face of the levelling layer being parallel to an underside of the rear substrate,
wherein an adhesive layer is provided on the upper face of the levelling layer, the adhesive layer being parallel to the underside of the rear substrate and the upper face of the levelling layer, and
wherein the reflective polarizing film being secured to the underside of the rear substrate by securing the adhesive layer to the underside of the rear substrate.