Brightness enhancement film

• US 6,277,471 B1
• Filed: 06/18/1999
• Issued: 08/21/2001
• Est. Priority Date: 06/18/1999
• Status: Expired due to Fees

• Current Assignee: EFUN Technology Company Limited
• Original Assignee: Shih Chieh Tang
• Inventors: Tang, Shih Chieh
• Primary Examiner(s): Loney, Donald J.
• Application Number:
  US09/335,487
• Time in Patent Office: 795 Days
• Field of Search: 428/167, 428/172, 428/141, 428/913, 359/530, 359/321, 359/454, 359/459
• US Class Current: 428/172
• CPC Class Codes: G02B 5/00 Optical elements other than lenses light guides G02B6/00; optical logic elements G02F3/00
• CPC Class Codes: G02B 5/045 Prism arrays
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/2457 Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24612 Composite web or sheet

Abstract

A brightness enhancement film essentially comprises a base and a brightness layer. A brightness layer is molded to create a plurality of prisms in the molding process. Then the brightness layer is adhesively attached to the top surface of the base before the curing process so as to form the brightness enhancement film. Therefore, the top surface of the brightness layer and the bottom surface of the base respectively define the top surface and the bottom surface of the brightness enhancement film.

Claims

1. A brightness enhancement film comprising:

a base having a top surface and a bottom surface; and

a brightness layer having a top surface which is defined by a plurality of brightness units and further having a bottom surface;

said top surface defined by a plurality of brightness units being configured for enhanced optical performance in two dimensions to form a uniform display;

wherein the bottom surface of the brightness layer is adhesively attached to the top surface of the base to form the brightness enhancement film.

2. The brightness enhancement film, as defined in claim 1, wherein the brightness units are aligned adjacent to one another to form a prisms and a plurality of prisms are aligned side-by-side in a parallel plane to form the brightness layer.

3. The brightness enhancement film, as defined in claim 1, wherein the brightness layer is made of epoxy compound.