Wide Color Gamut Backlight for Liquid Crystal Displays Using Three-Band Phosphor-Converted White Light-Emitting Diodes

• DOI: 10.1143/apex.2.022401
• Publication Date: 2009-01-23T03:34:28Z
• Authors: Rong-Jun Xie; Naoto Hirosaki; Takashi Takeda
• Keywords: Backlight; Gamut; Primary color

This work reports a wide color gamut backlight for liquid crystal display (LCD) utilizing three-band white light-emitting diodes (LED). The LED was fabricated by combining blue chip with β-sialon:Eu (green) and CaAlSiN3:Eu (red) phosphors. 2-phosphor-converted shows discrete spectrum distinct separation of red, green, primary colors due to narrow asymmetric emission band the green phosphor. By applying typical filters LCDs color-matching functions, 91.9% National Television Standard Committee standard is attained, compared 71.6% conventional two-band LED.