17-inch 8K 120-Hz driving and BT.2020 color gamut LCDs with laser backlights

Yoichi Asakawa; Ken Onoda; Hiroaki Kijima; Shinichi Komura

doi:10.1117/12.2516882

1 March 2019 17-inch 8K 120-Hz driving and BT.2020 color gamut LCDs with laser backlights

Yoichi Asakawa, Ken Onoda, Hiroaki Kijima, Shinichi Komura

Proceedings Volume 10943, Ultra-High-Definition Imaging Systems II; 109430L (2019) https://doi.org/10.1117/12.2516882
Event: SPIE OPTO, 2019, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Yoichi Asakawa, Ken Onoda, Hiroaki Kijima, and Shinichi Komura "17-inch 8K 120-Hz driving and BT.2020 color gamut LCDs with laser backlights", Proc. SPIE 10943, Ultra-High-Definition Imaging Systems II, 109430L (1 March 2019); https://doi.org/10.1117/12.2516882

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