| 摘要 |
<p>The surface structure (32) of a transparent film (30, 60, 84) recycles light (54, 70) that would exit an LCD display (82) at angles greater than 75° for brightness enhancement. The disclosed structures might not include small prisms (36, with a height of 5-20µm) with facets angled at about 90°, but they all contain (large) prisms (38, with a height of 20-50µm) that feature a (rounded) peaks with facets (40,42) angled at about 96°, and a base with facets (44, 46) angled at about 90°. The radius of curvature (r<SUB>c</SUB>) of a rounded peak is small (<10.5µm) to avoid undesirable brightness reduction.</p> |
