Transflective liquid crystal display device and fabricating method thereof

• US 7,545,465 B2
• Filed: 12/28/2004
• Issued: 06/09/2009
• Est. Priority Date: 12/29/2003
• Status: Expired due to Fees

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Nam, Chul
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): Briggs; Nathanael R
• Application Number:
  US11/025,219
• Publication Number:
  US 20050140879A1
• Time in Patent Office: 1,624 Days
• Field of Search: 349/113, 349/114
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

A transflective liquid crystal display device includes opposing substrates having a liquid crystal layer interposed between the substrates. Polarizers are disposed on outer sides of the substrates. An uneven transflective film is disposed on one of the polarizers. A backlight unit is disposed outside of the uneven transflective film. The uneven transflective film includes a base film, convex patterns on the base film and a reflective layer in concave portions between the convex patterns. A passivation layer is disposed on the convex patterns and the reflective layer. Light from the backlight unit is transmitted through the convex patterns and ambient light is reflected by the reflective layer in the concave portions.

Claims

1. A method of fabricating an uneven transflective film, the method comprising:

stamping a surface of a base film to form a plurality of convex patterns and a plurality of concave patterns, the plurality of convex patterns having a hemispherical shape on a base film;

forming a reflective material layer on an entire surface of the convex patterns and the plurality of concave patterns; and

etching the reflective material layer corresponding to the convex patterns to form a reflective layer on an entire top surface of the base film excluding the plurality of convex patterns,

wherein at least one of the plurality of convex patterns is disposed in a center of a pixel region, and

wherein each concave pattern has a V shape, and a thickness of the reflective layer corresponding to a center of the each concave pattern is greater than a thickness of the reflective layer corresponding to edges of the each concave pattern.

2. The method according to claim 1, wherein etching the reflective material layer utilizes photolithography.

3. The method according to claim 1, wherein each of the convex patterns has a hemispherical shape.

4. The method according to claim 1, wherein the reflective layer is a single layer.

5. The method according to claim 1, wherein the reflective material layer is etched such that no reflective layer remains on the convex patterns that are corresponding to open portions of the uneven transflective film that are not covered by a reflective material.

6. The method according to claim 5, wherein the reflective material layer is etched such that the reflective layer only remains between the convex patterns that are corresponding to the open portions of the uneven transflective film that are not covered by the reflective material.