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Proceedings Paper

17-inch 8K 120-Hz driving and BT.2020 color gamut LCDs with laser backlights
Author(s): Yoichi Asakawa; Ken Onoda; Hiroaki Kijima; Shinichi Komura
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Paper Abstract

The International Telecommunication Union Radiocommunication Sector (ITU-R) Recommendation BT.2020 was standardized for ultra-high definition television (UHDTV). The BT.2020 specifications are 8K resolutions, a wide color gamut, and 120-Hz driving. The BT.2020 color gamut is defined from the three primary monochrome colors. Therefore, changing the light source of the backlight from conventional light-emitting diodes (LEDs) to lasers is necessary. We succeeded in prototyping a 17-inch 8K liquid crystal display (LCD) that satisfies the BT.2020 specifications. The pixel density of the 17-inch 8K display is 510 ppi, and the color gamut covers 97% of BT.2020. The liquid crystal response time is 5 ms, which is sufficient for the 120-Hz driving. To achieve the above-mentioned specifications, we developed the following technologies. To expand the color gamut, an RGB laser backlight was used. A backlight with conventional LEDs as light sources only covered 52% of BT.2020. To reduce response time, we applied a faster in-plane switching LCD (IPS-LCD) named short-range lurch control (SLC) IPS-LCD. We succeeded in realizing a blur-free display using the SLC IPS.

Paper Details

Date Published: 1 March 2019
PDF: 13 pages
Proc. SPIE 10943, Ultra-High-Definition Imaging Systems II, 109430L (1 March 2019); doi: 10.1117/12.2516882
Show Author Affiliations
Yoichi Asakawa, Japan Display Inc. (Japan)
Ken Onoda, Japan Display, Inc. (Japan)
Hiroaki Kijima, Japan Display, Inc. (Japan)
Shinichi Komura, Japan Display, Inc. (Japan)

Published in SPIE Proceedings Vol. 10943:
Ultra-High-Definition Imaging Systems II
Seizo Miyata; Toyohiko Yatagai; Yasuhiro Koike, Editor(s)

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