Eliminating hotspots in a multi-chip LED array direct backlight system with optimal patterned reflectors for uniform illuminance and minimal system thickness

Optics Express

Volumn 18, Issue 8, 2010, Pages 8595-8604

  Kim, Byungwook ^a   Kim, Joongeok ^a   Ohm, Won Suk ^a   Kang, Shinill ^a  

^a Yonsei University   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

DISTRIBUTION FUNCTIONS; OPTICAL DESIGN; OPTICAL ENGINEERING; SPECIFICATIONS; TARGETS;

ARRAY CONFIGURATIONS; BACKLIGHT SYSTEMS; BACKLIGHT UNITS; BASIC SYSTEMS; DESIGN PROCESS; DRIVING CURRENT; FLUX RATIO; HOTSPOTS; ILLUMINANCE DISTRIBUTION; LED ARRAYS; MINIMUM THICKNESS; MULTI-CHIP; OPTICAL CHARACTERISTICS; OPTICAL COMPONENTS; OPTICAL DESIGN PROCESS; OPTICAL EFFICIENCY; TRIANGULAR CLUSTERS; WHITE POINT;

LIGHT EMITTING DIODES;

EID: 77950878411     PISSN: None     EISSN: 10944087     Source Type: Journal    
DOI: 10.1364/OE.18.008595     Document Type: Article

References (14)

1. D. M. Brown, R. Dean, and J. D. Brown, "LED backlight: design, fabrication, and testing," Proc. SPIE 3938, 180-187 (2000).
2. E. F. Schubert, and J. K. Kim, "Solid-state light sources getting smart," Science 308(5726), 1274-1278 (2005).
3. M. Anandan, "Progress of LED backlights for LCDs," J. Soc. Inf. Disp. 16(2), 287-310 (2008).
4. G. Wyszecki, and W. S. Stiles, Color Science 2nd Edition (Wiley, New York, 1982).
5. K. Liang, W. Li, H. R. Ren, X. L. Liu, W. J. Wang, R. Yang, and D. J. Han, "Color measurement for RGB white LEDs in solid-state lighting using a BDJ photodetector," Displays 30(3), 107-113 (2009).
6. S. Muthu, and J. Gaines, "Red, green and blue LED-based white light source: Implementation challenges and control design," in Proc. IEEE IAS Annu. Meeting 1 515-522 (2003).
7. P. Deurenberg, C. Hoelen, J. van Meurs, and J. Ansems, "Achieving color point stability in RGB multi-chip LED modules using various color control loops," Proc. SPIE 5941, 59410C (2005). (Pubitemid 43183099)
8. Ki-Chan Lee, Seung-Hwan Moon, Brian Berkeley, and Sang-Soo Kim,"Optical feedback system with integrated color sensor on LCD," Sens, Actuators A 130-131, 214-219 (2006). (Pubitemid 44037354)
9. W. Robert, Boyd, Radiometry and Dectection of Optical Radiation (Wiley, New York, 1983).
10. G. Harbers, S. J. Bierhuizen, and M. R. Krames, "Performance of high power light emitting diodes in display illumination applications," J. Display Technol. 3(2), 98-109 (2007). (Pubitemid 46808665)
11. I. Moreno, M. Avendaño-Alejo, and R. I. Tzonchev, "Designing light-emitting diode arrays for uniform nearfield irradiance," Appl. Opt. 45(10), 2265-2272 (2006). (Pubitemid 43835219)
12. P. C.-P. Chao, L.-D. Liao, and C.-W. Chiu, "Design of a Novel LED Lens Cap and Optimization of LED Placement in a Large Area Direct Backlight for LCD-TVs," Proc. SPIE 6196, 61960N (2006).
13. Yankun Zhen, Zhenan Jiaa and Wenzi Zhang, "The Optimization of Directly-Under-Light Type Backlight Module Structure for Brightness Uniformity," Key Engineering Materials 364-366, 166-171 (2008).
14. B. Kim, M. Choi, H. Kim, J. Lim, and S. Kang, "Elimination of flux loss by optimizing the groove angle in modified Fresnel lens to increase illuminance uniformity, color uniformity and flux efficiency in LED illumination," Opt. Express 17(20), 17916-17927 (2009).