| Citation: | WEI Wei, CHEN Zhi-zhong, GUO Hao-zhong, JIA Chuan-yu, FANG Fang, ZOU Jun, FANG Qian, WU You, SUN Ming-hao, LI Qian, KUANG Yu-han, YIN Qi-kai, ZHANG Guo-yi. Optical simulation design of surface mounted device beads for wide beam and high uniformity display[J]. Chinese Optics, 2024, 17(1): 217-225. doi: 10.37188/CO.EN-2023-0017
|
Through analysing the optical requirements of wide beam and high uniformity light beads, which are currently used in displays, and packaging micro Light-Emitting Diode (LED) chips with a novel non-Lambertian distribution, we realized the production of wide beam and high uniformity micro-LED chip light beads. The light output efficiency and beam angle of fixed beads were simulated using brackets made of copper, titanium, aluminium and silver, as well as materials that were completely reflecting and absorbing. The simulations were conducted at various fixture angles, packaging heights, packaging materials, sapphire thicknesses, and patterned sapphire substrate sizes. By adjusting the chip and packaging parameters, we can obtain one, two, or three light beams with Surface Mounted Device (SMD) lamp beads characteristics that provide wide angles, high uniformity, and far-field light distribution. These characteristics can meet the current display requirements for LED and LCD.
| [1] |
KIKUCHI S, SHIBATA Y, ISHINABE T, et al. Thin mini-LED backlight using reflective mirror dots with high luminance uniformity for mobile LCDs[J]. Optics Express, 29(17): 26724-26735.
|
| [2] |
GAO ZH W, NING H L, YAO R H, et al. Mini-LED backlight technology progress for liquid crystal display[J]. Crystals, 2022, 12(3): 313. doi: 10.3390/cryst12030313
|
| [3] |
YANG ZH Y, HSIANG E L, QIAN Y ZH, et al. Performance comparison between mini-LED backlit LCD and OLED display for 15.6-inch notebook computers[J]. Applied Sciences, 2022, 12(3): 1239. doi: 10.3390/app12031239
|
| [4] |
ZOU G W, WANG Z Y, LIU Y T, et al. Deep learning-enabled image content-adaptive field sequential color LCDs with mini-LED backlight[J]. Optics Express, 2022, 30(12): 21044-21064. doi: 10.1364/OE.459752
|
| [5] |
HSIANG E L, YANG ZH Y, YANG Q, et al. Prospects and challenges of mini-LED, OLED, and micro-LED displays[J]. Journal of the Society for Information Display, 2021, 29(6): 446-465. doi: 10.1002/jsid.1058
|
| [6] |
MILLER M E. LCD Display Technology[M]//MILLER M E. Color in Electronic Display Systems: Advantages of Multi-primary Displays. Cham: Springer, 2019: 87-105.
|
| [7] |
ZOU G W, WANG Z Y, YANG W CH, et al. 65‐1: Deep learning-enabled image content adaptive driving algorithm for field sequential color LCDs with mini-LED backlight[J]. SID Symposium Digest of Technical Papers, 2022, 53(1): 857-860. doi: 10.1002/sdtp.15628
|
| [8] |
HUANG Y G, TAN G J, GOU F W et al. Prospects and challenges of mini-LED and micro-LED displays[J]. Journal of the Society for Information Display, 2019, 27(7): 387-401. doi: 10.1002/jsid.760
|
| [9] |
LEE J G, KO J H. Optimization of the optical structure of thin direct-lit LED backlights for LCD applications by using micro-LEDs[J]. Journal of Information Display, 2020, 21(1): 65-70. doi: 10.1080/15980316.2019.1693436
|
| [10] |
SHEN B, ASPELL J, RINEHART T, et al. P‐206: Late-news-poster: lattice patterned micro lens array (MLA) optical films for mini-LED back light units (BLUs)[J]. SID Symposium Digest of Technical Papers, 2020, 51(1): 1649-1651. doi: 10.1002/sdtp.14211
|
| [11] |
HSIANG E L, LI Y N Q, HE Z Q, et al. Enhancing the efficiency of color conversion micro-LED display with a patterned cholesteric liquid crystal polymer film[J]. Nanomaterials, 2020, 10(12): 2430. doi: 10.3390/nano10122430
|
| [12] |
YU X J, XIANG L Y, ZHOU SH L, et al. Effect of refractive index of packaging materials on the light extraction efficiency of COB-LEDs with millilens array[J]. Applied Optics, 2021, 60(2): 306-311. doi: 10.1364/AO.410141
|
| [13] |
HUANG C G, HU M, ZHANG CH Y, et al. Narrow beam uniform illumination design of COB light source[J]. High Power Laser and Particle Beams, 2021, 33(2): 029002. (in Chinese).
|
| [14] |
HAO R, GE A, TAO X, et al. Optical design of a high-mast luminaire based on four COB LED light source modules[J]. Lighting Research & Technology, 2019, 51(3): 447-456.
|
| [15] |
QIU Y, CHEN H H, MENG W X. Channel modeling for visible light communications—a survey[J]. Wireless Communications and Mobile Computing, 2016, 16(14): 2016-2034. doi: 10.1002/wcm.2665
|
| [16] |
WANG K, CHEN F, LIU Z Y, et al. Design of compact freeform lens for application specific light-emitting diode packaging[J]. Optics Express, 2010, 18(2): 413-425. doi: 10.1364/OE.18.000413
|
| [17] |
KEMPER B, STÜRWALD S, REMMERSMANN C, et al. Characterisation of light emitting diodes (LEDs) for application in digital holographic microscopy for inspection of micro and nanostructured surfaces[J]. Optics and Lasers in Engineering, 2008, 46(7): 499-507. doi: 10.1016/j.optlaseng.2008.03.007
|
| [18] |
GFELLER F R, BAPST U. Wireless in-house data communication via diffuse infrared radiation[J]. Proceedings of the IEEE, 1979, 67(11): 1474-1486. doi: 10.1109/PROC.1979.11508
|
| [19] |
GALEOTTI F, MRÓZ W, SCAVIA G, et al. Microlens arrays for light extraction enhancement in organic light-emitting diodes: A facile approach[J]. Organic Electronics, 2013, 14(1): 212-218. doi: 10.1016/j.orgel.2012.10.034
|
| [20] |
CARRASCOSA M, CUSSO F, AGULLO-LOPEZ F. Lambert emitters: a simple Monte-Carlo approach to optical diffusers[J]. European Journal of Physics, 1985, 6(3): 183-187. doi: 10.1088/0143-0807/6/3/011
|
| [21] |
WEI W, CHEN Y Y, WANG C X, et al. Simulation of far-field light distribution of micro-LED based on its structural parameters[J]. Materials, 2022, 15(24): 8854. doi: 10.3390/ma15248854
|
| [22] |
FAN Z Y, LIN J Y, JIANG H X. III-nitride micro-emitter arrays: development and applications[J]. Journal of Physics D:Applied Physics, 2008, 41(9): 094001. doi: 10.1088/0022-3727/41/9/094001
|
| [23] |
PARK H J, CHA Y J, KWAK J S. Chip size-dependent light extraction efficiency for blue micro-LEDs[J]. Journal of the Korean Institute of Electrical and Electronic Material Engineers, 2019, 32(1): 47-52.
|
| [24] |
BAYNEVA I I. Calculation and construction of optical elements of light devices[J]. Dilemas Contemp Educ Política Valores, 2019, 6: 58.
|
| [25] |
GUO W, MENG H, CHEN Y R, et al. Wafer-level monolithic integration of vertical micro-LEDs on glass[J]. IEEE Photonics Technology Letters, 2020, 32(12): 673-676. doi: 10.1109/LPT.2020.2991672
|
| [26] |
LELIKOV Y S, BOCHKAREVA N I, GORBUNOV R I, et al. Measurement of the absorption coefficient for light laterally propagating in light-emitting diode structures with In0.2Ga0.8N/GaN quantum wells[J]. Semiconductors, 2008, 42(11): 1342-1345. doi: 10.1134/S1063782608110195
|
| [27] |
ZHAO G Y, ISHIKAWA H, JIANG H, et al. Optical absorption and photoluminescence studies of n-type GaN[J]. Japanese Journal of Applied Physics, 1999, 38(9A): L993-L995. doi: 10.1143/JJAP.38.L993
|
| [28] |
YANG D, THOMAS M E, TROPF W J. Infrared refractive index of sapphire as a function of temperature[J]. Proceedings of SPIE, 1999, 3705: 60-69. doi: 10.1117/12.354642
|
| [29] |
O’MAHONY D, HOSSAIN M N, JUSTICE J, et al. High index contrast optical platform using gallium phosphide on sapphire: an alternative to SOI?[J]. Proceedings of SPIE, 2012, 8431: 84311H. doi: 10.1117/12.922687
|
| [30] |
TRAN N T, SHI F G. LED package design for high optical efficiency and low viewing angle[C]. Proceedings of 2007 International Microsystems, Packaging, Assembly and Circuits Technology, IEEE, 2007: 10-13.
|
Figures(10) / Tables(10)
DownLoad:
