Speckle reduction in polarized laser backlight LCDs

Koichi Okuda; Ken Onoda; Hiroaki Kijima; Shinichi Komura

doi:10.1117/12.2586773

5 March 2021 Speckle reduction in polarized laser backlight LCDs

Koichi Okuda, Ken Onoda, Hiroaki Kijima, Shinichi Komura

Proceedings Volume 11709, Ultra-High-Definition Imaging Systems IV; 117090O (2021) https://doi.org/10.1117/12.2586773
Event: SPIE OPTO, 2021, Online Only

Abstract

We have developed a 17.3-inch 8K wide color gamut in-plane switching LCD (IPS-LCD) with a polarized laser backlight. By applying a zero–zero-birefringence polymer, the polarized laser backlight emits polarized light with 88% polarization. We adapted the double light guide plate laser backlight to achieve uniform luminance. The developed IPS-LCD achieves a wide color gamut with high efficiency. The speckle problem was solved by applying an AC voltage to the laser diodes. In addition, the double light guide plates effectively suppress the speckle as the light is uniformly mixed in the light guide plate.

Conference Presentation

Citation Download Citation

Koichi Okuda, Ken Onoda, Hiroaki Kijima, and Shinichi Komura "Speckle reduction in polarized laser backlight LCDs", Proc. SPIE 11709, Ultra-High-Definition Imaging Systems IV, 117090O (5 March 2021); https://doi.org/10.1117/12.2586773

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