Liquid crystal display device

• US 8,054,414 B2
• Filed: 12/21/2006
• Issued: 11/08/2011
• Est. Priority Date: 06/30/2006
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Park, Chi Hyuck, Lee, Seung Hee
• Primary Examiner(s): Nguyen; Thanh-Nhan
• Application Number:
  US11/642,629
• Publication Number:
  US 20080002105A1
• Time in Patent Office: 1,783 Days
• Field of Search: None
• US Class Current: 349/95
• CPC Class Codes: G02F 1/133526 Lenses, e.g. microlenses or Fresnel lenses
• CPC Class Codes: G02F 1/133562 on the viewer side

Abstract

A liquid crystal display (LCD) device including upper and lower substrates facing each other with a liquid crystal layer interposed therebetween, upper and lower polarization plates positioned on outer surfaces of the upper and lower substrates, respectively, and a beam steering film positioned on the upper polarization plate and including a plurality of curved-lenses formed on a surface of the beam steering film facing the upper polarization plate.

Claims

1. A liquid crystal display device, comprising:

upper and lower substrates facing each other with a liquid crystal layer interposed therebetween;

upper and lower polarization plates positioned on outer surfaces of the upper and lower substrates, respectively; and

a beam steering film positioned on the upper polarization plate,

wherein the beam steering film further comprises a plurality of scattering layers to provide a Haze property, a plurality of randomly arranged supporting parts positioned on a lower surface of the plurality of scattering layers, and a plurality of ridged parts positioned on a lower surface of each of the plurality of randomly arranged supporting parts and having a plurality of curved lenses facing the upper polarization plate, and

wherein the beam steering film is randomly arranged instead of being arranged linearly.

2. The LCD device according to claim 1, wherein curved lenses have an equal width.

3. The LCD device according to claim 1, wherein each curved lens has a convex shape.

4. The LCD device according to claim 1, wherein the curved lenses are spaced a predetermined distance from the upper polarization plate.

5. The LCD device according to claim 1, further comprising:

a fixing mechanism configured to fix both sides of the beam steering film to prevent the beam steering film from contacting the upper polarization film.

6. The LCD device according to claim 1, wherein each curved lens has a width of about 300 μ

m or less for 100 ppi.

7. The LCD device according to claim 1, the plurality of ridged parts has each of the curved lenses spaced a predetermined distance from each other and arranged in one direction on a lower surface of the supporting part.

8. The LCD device according to claim 1, wherein two or more of each of the curved lenses have different thicknesses and widths from each other.

9. The LCD device according to claim 1, wherein each of the curved lenses has an asymmetrical shape.

10. The LCD device according to claim 9, wherein each of the curved-lenses of the ridged part is slanted toward one side of a lower portion of the curved-lens of the ridged part.

11. The LCD device according to claim 1, wherein the beam steering film comprises at least one of polymethylmethacrylate (PMMA), vinyl chloride, acrylic resins, polycarbonate (PC), polyethylene therephtalate (PET), polyethylene (PE), polystyrene (PS), polypropylene (PP), polyimide (PI), glass and silica, or a combination thereof.