Mini-LEDs with Diffuse Reflection Cavity Arrays and Quantum Dot Film for Thin, Large-Area, High-Luminance Flat Light Source

• Published in: Nanomaterials (Basel, Switzerland) Vol. 11; no. 9; p. 2395
• Main Authors: Ye, Zhi Ting, Cheng, Yuan Heng, Liu, Ku Huan, Yang, Kai Shiang
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 14.09.2021; MDPI
• Subjects: Arrays; Backlights; Brightness; Design; diffuse reflection cavity array; Dimming; Efficiency; Free form; LCDs; Light emitting diodes; Light sources; Liquid crystal displays; luminance; mini-light-emitting diode; Modules; Polyethylene terephthalate; quantum dot film; Quantum dots; Reflection; Saturation (color); Simulation; uniformity; luminance; mini-light-emitting diode; uniformity; diffuse reflection cavity array; quantum dot film
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano11092395

Mini-light-emitting diodes (mini-LEDs) were combined with multiple three-dimensional (3D) diffuse reflection cavity arrays (DRCAs) to produce thin, large-area, high-brightness, flat light source modules. The curvature of the 3D free-form DRCA was optimized to control its light path; this increased the distance between light sources and reduced the number of light sources used. Experiments with a 12.3-inch prototype indicated that 216 mini-LEDs were required for a 6 mm optical mixing distance to achieve a thin, large-area surface with high brightness, uniformity, and color saturation of 23,044 cd/m , 90.13%, and 119.2, respectively. This module can serve as the local dimming backlight in next generation automotive displays.