Mini-LED and Micro-LED: Promising Candidates for the Next Generation Display Technology
Tóm tắt
Displays based on inorganic light-emitting diodes (LED) are considered as the most promising one among the display technologies for the next-generation. The chip for LED display bears similar features to those currently in use for general lighting, but it size is shrunk to below 200 microns. Thus, the advantages of high efficiency and long life span of conventional LED chips are inherited by miniaturized ones. As the size gets smaller, the resolution enhances, but at the expense of elevating the complexity of fabrication. In this review, we introduce two sorts of inorganic LED displays, namely relatively large and small varieties. The mini-LEDs with chip sizes ranging from 100 to 200 μm have already been commercialized for backlight sources in consumer electronics applications. The realized local diming can greatly improve the contrast ratio at relatively low energy consumptions. The micro-LEDs with chip size less than 100 μm, still remain in the laboratory. The full-color solution, one of the key technologies along with its three main components, red, green, and blue chips, as well color conversion, and optical lens synthesis, are introduced in detail. Moreover, this review provides an account for contemporary technologies as well as a clear view of inorganic and miniaturized LED displays for the display community.
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Tài liệu tham khảo
Robert, L., and Barbin, A.S.P. (1999). Cathode-ray tube displays. Wiley Encyclopedia of Electrical and Electronics Engineering, Wiley Online Library.
Weber, 2006, History of the plasma display panel, IEEE Trans. Plasma Sci., 34, 268, 10.1109/TPS.2006.872440
Chang, 2004, DLS: Dynamic backlight luminance scaling of liquid crystal display, IEEE Trans. Very Large Scale Integr. (VLSI) Syst., 12, 837, 10.1109/TVLSI.2004.831472
Boeuf, 2003, Plasma display panels: Physics, recent developments and key issues, J. Phys. D Appl. Phys., 36, R53, 10.1088/0022-3727/36/6/201
Schadt, M. (2009). Milestone in the History of Field-Effect Liquid Crystal Displays and Materials. Jpn. J. Appl. Phys., 48.
Peng, F.L., Chen, H.W., Gou, F.W., Lee, Y.H., Wand, M., Li, M.C., Lee, S.L., and Wu, S.T. (2017). Analytical equation for the motion picture response time of display devices. J. Appl. Phys., 121.
Li, 2018, Ultra-fast moving-picture response-time LCD for virtual reality application, SID Symposium Digest of Technical Papers, Volume 49, 678, 10.1002/sdtp.12344
Geffroy, 2006, Organic light-emitting diode (OLED) technology: Materials, devices and display technologies, Polym. Int., 55, 572, 10.1002/pi.1974
Chen, 2017, Ambient contrast ratio of LCDs and OLED displays, Opt. Express, 25, 33643, 10.1364/OE.25.033643
Chen, 2018, Liquid crystal display and organic light-emitting diode display: Present status and future perspectives, Light Sci. Appl., 7, 17168, 10.1038/lsa.2017.168
Lv, 2014, Energy-saving driver design for full-color large-area LED display panel systems, IEEE Trans. Ind. Electron., 61, 4665, 10.1109/TIE.2013.2288209
Templier, 2016, GaN-based emissive microdisplays: A very promising technology for compact, ultra-high brightness display systems, J. Soc. Inf. Display, 24, 669, 10.1002/jsid.516
(2018, July 30). Micro-LED Market by Application, Display Panel Size, Vertical, and Geography-Global Forecast to 2025. Available online: https://www.researchandmarkets.com/reports/4535720/micro-led-market-by-application-display#pos-0.
(2018, July 30). MicroLED Displays Could Disrupt LCD and OLED. Available online: http://www.yole.fr/MicroLEDDisplays_Market.aspx#.W1lAV_knaEs.
Seetzen, 2004, High dynamic range display systems, ACM Transactions on Graphics (TOG), Volume 23, 760, 10.1145/1015706.1015797
Daly, 2013, Viewer preferences for shadow, diffuse, specular, and emissive luminance limits of high dynamic range displays, SID Symposium Digest of Technical Papers, Volume 44, 563, 10.1002/j.2168-0159.2013.tb06271.x
Tan, 2018, High dynamic range liquid crystal displays with a mini-LED backlight, Opt. Express, 26, 16572, 10.1364/OE.26.016572
Deng, 2018, High dynamic range incell LCD with excellent performance, SID Symposium Digest of Technical Papers, Volume 49, 996, 10.1002/sdtp.12215
(2018, July 30). AUO’s Full Series of Mini LED Backlit LCDs Make Stunning Appearance to Establish Foothold in High-End Application Market. Available online: https://www.auo.com/en-global/New_Archive/detail/News_Archive_Technology_180522.
(2018, July 30). [Display Week 2018 Show Report]-Mini LED Backlight Business Opportunities Boost. Available online: https://www.ledinside.com/showreport/2018/5/display_week_2018_show_report_mini_led_backlight_business_opportunities_boost.
Jin, 2000, InGaN/GaN quantum well interconnected microdisk light emitting diodes, Appl. Phys. Lett., 77, 3236, 10.1063/1.1326479
Wu, 2016, Multi-function indoor light sources based on light-emitting diodes-a solution for healthy lighting, Opt. Express, 24, 24401, 10.1364/OE.24.024401
Wu, 2017, Improvements of mesopic luminance for light-emitting-diode-based outdoor light sources via tuning scotopic/photopic ratios, Opt. Express, 25, 4887, 10.1364/OE.25.004887
Wu, 2018, Analyses of multi-color plant-growth light sources in achieving maximum photosynthesis efficiencies with enhanced color qualities, Opt. Express, 26, 4135, 10.1364/OE.26.004135
Wang, 2015, Highly efficient narrow-band green and red phosphors enabling wider color-gamut LED backlight for more brilliant displays, Opt. Express, 23, 28707, 10.1364/OE.23.028707
Jiang, 2013, Nitride micro-LEDs and beyond—A decade progress review, Opt. Express, 21, A475, 10.1364/OE.21.00A475
Tian, 2016, Fabrication, characterization and applications of flexible vertical InGaN micro-light emitting diode arrays, Opt. Express, 24, 699, 10.1364/OE.24.000699
Zhang, 2017, Fully-integrated active matrix programmable UV and blue micro-LED display system-on-panel (SoP), J. Soc. Inf. Display, 25, 240, 10.1002/jsid.550
Zhang, 2018, Wafer-scale monolithic hybrid integration of Si-based IC and III-V epi-layersA mass manufacturable approach for active matrix micro-LED micro-displays, J. Soc. Inf. Display, 26, 137, 10.1002/jsid.649
Cok, 2017, Inorganic light-emitting diode displays using micro-transfer printing, J. Soc. Inf. Display, 25, 589, 10.1002/jsid.610
Corbett, 2017, Transfer print techniques for heterogeneous integration of photonic components, Prog. Quantum Electron., 52, 1, 10.1016/j.pquantelec.2017.01.001
Chanyawadee, 2010, Increased color-conversion efficiency in hybrid light-emitting diodes utilizing non-radiative energy transfer, Adv. Mater., 22, 602, 10.1002/adma.200902262
Zhuang, 2016, High color rendering index hybrid III-nitride/nanocrystals white light-emitting diodes, Adv. Funct. Mater., 26, 36, 10.1002/adfm.201502870
Kang, 2018, Hybrid integration of RGB inorganic LEDs using adhesive bonding and selective area growth, SID Symposium Digest of Technical Papers, Volume 49, 604, 10.1002/sdtp.12410
Peng, 2016, Full-color pixelated-addressable light emitting diode on transparent substrate (LEDoTS) micro-displays by CoB, J. Disp. Technol., 12, 742, 10.1109/JDT.2016.2518491
Even, 2017, Enhanced In incorporation in full InGaN heterostructure grown on relaxed InGaN pseudo-substrate, Appl. Phys. Lett., 110, 5, 10.1063/1.4989998
Even, A. (2018). In Incorporation Improvement in InGaN Based Active Region Using InGaN Pseudo Substrate for Monolithic White LED Application. [Ph.D. Thesis, Université Grenoble Alpes].
Liu, 2011, Active matrix programmable monolithic light emitting diodes on silicon (LEDoS) displays, SID Symposium Digest of Technical Papers, Volume 42, 1215, 10.1889/1.3621049
Chen, 2014, Optimization of light efficacy and angular color uniformity by hybrid phosphor particle size for white light-emitting diode, Rare Met., 33, 348, 10.1007/s12598-013-0216-9
Pust, 2014, Narrow-band red-emitting Sr LiAl3N4:Eu2+ as a next-generation LED-phosphor material, Nat. Mater., 13, 891, 10.1038/nmat4012
Mattoussi, 2000, Self-assembly of CdSe-ZnS quantum dot bioconjugates using an engineered recombinant protein, J. Am. Chem. Soc., 122, 12142, 10.1021/ja002535y
Shirasaki, 2013, Emergence of colloidal quantum-dot light-emitting technologies, Nat. Photonics, 7, 13, 10.1038/nphoton.2012.328
Medintz, 2005, Quantum dot bioconjugates for imaging, labelling and sensing, Nat. Mater., 4, 435, 10.1038/nmat1390
Han, 2015, Resonant-enhanced full-color emission of quantum-dot-based micro LED display technology, Opt. Express, 23, 32504, 10.1364/OE.23.032504
Lin, 2017, Optical cross-talk reduction in a quantum-dot-based full-color micro-light-emitting-diode display by a lithographic-fabricated photoresist mold, Photonics Res., 5, 411, 10.1364/PRJ.5.000411
Jiang, 2016, Coffee-ring-free quantum dot thin film using inkjet printing from a mixed-solvent system on modified ZnO transport layer for light-emitting devices, ACS Appl. Mater. Int., 8, 26162, 10.1021/acsami.6b08679
Chen, 2018, Monolithic red/green/blue micro-LEDs with HBR and DBR structures, IEEE Photonics Technol. Lett., 30, 262, 10.1109/LPT.2017.2786737
Dai, 2014, Solution-processed, high-performance light-emitting diodes based on quantum dots, Nature, 515, 96, 10.1038/nature13829
Zhang, H., Sun, X.W., and Chen, S.M. (2017). Over 100 cd A−1 efficient quantum dot light-emitting diodes with inverted tandem structure. Adv. Funct. Mater., 27.
Wang, 2017, Blue quantum dot light-emitting diodes with high electroluminescent efficiency, ACS Appl. Mater. Int., 9, 38755, 10.1021/acsami.7b10785
Lee, 2018, Full-color capable light-emitting diodes based on solution-processed quantum dot layer stacking, Nanoscale, 10, 6300, 10.1039/C8NR00307F
Liu, 2013, A novel BLU-free full-color LED projector using LED on silicon micro-displays, IEEE Photonics Technol. Lett., 25, 2267, 10.1109/LPT.2013.2285229