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Technologies for the Crystal LED display system
Author(s) -
Biwa Goshi,
Aoyagi Akiyoshi,
Doi Masato,
Tomoda Katsuhiro,
Yasuda Atsushi,
Kadota Hisashi
Publication year - 2021
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.993
Subject(s) - light emitting diode , active matrix , rgb color model , chromaticity , materials science , microscale chemistry , led display , optoelectronics , liquid crystal display , luminance , computer science , pixel , brightness , scalability , optics , artificial intelligence , layer (electronics) , physics , thin film transistor , nanotechnology , mathematics education , mathematics , database , operating system
We have developed novel active matrix driving technology integrating red–green–blue (RGB) microscale light emitting diodes (micro LEDs) and a microscale integrated circuit (micro IC) in each pixel for the Crystal LED display system. The small size and closely placed RGB subpixels of micro LEDs enabled us to achieve an outstanding contrast ratio even in a bright environment. We also achieved superior luminance linearity and chromaticity stability using accurate pulse width modulation (PWM) driving by micro ICs in the active matrix system. To integrate micro LEDs and micro ICs into a scalable display system, an additional fine‐patterned layer was applied to a conventional printed circuit board (PCB). In addition, with precise tiling technology, we could produce a large‐scale image providing an immersive visual experience.