).a( ecnanmuL.uiθ0Technical Awards：The 28th International Display Workshops(IDW) Best Paper Award (2021) - Optically Switchable Transparent Liquid Crystal Display Table 3 Optical propertiesFig.5 Viewing angle property in the screen state of sample No. 1 with Azo-A under the illuminance of 3350 lx.5. ConclusionsFig.6 Photographs of optically switchable transparent liquid crystal display of 10 cm x 10 cm sample No. 1. Image is projected from the front projector after UV irradiation.AcknowledgementReferencesWe demonstrated a new transparent display consisting of an optically switchable reverse-mode PNLC (of size 10 cm × 10 cm), a Vis projector, a UV LED, and a blue LED. Optical switching between the transparent state and the screen state of the PNLC was achieved through the chiral reversible azobenzene molecules under UV and blue light irradiation. A low-haze transparent state and a higher reflecting screen state of the PNLC were achieved at a high ΔHTP of chiral azobenzene. We confirmed that the projected images on the screen could be seen at a viewing angle of 60° due to the light scattering by the screen. We expect that this PNLC can be made flexible and large in size by utilizing PET films instead of glass substrates. This display can be used not only for signage but also for curved car windows.trans-cis photoisomerization of This research was partly supported by the Adaptable and Seamless Technology Transfer Program through Target-driven R&D (A-STEP) from the Japan Science and Technology Agency (JST).[1] C. Park, M. Seong, M. A. Kim, D. Kim, H. Jung, M. Cho, S. H. Lee, H. Lee, S. Min, J. Kim, M. Kim, J. H. Park, S. Kwon, B. Kim, S. J. Kim, W. Park, J. Y. Yang, S. Yoon and I. Kang "54-1: Distinguished Paper: World 1st Large Size 77-inch Transparent Flexible OLED Display." SID. Vol. 49, No. 1, pp. 710-713, (2018).[2] K. Okuyama, Y. Omori, M. Miyao, K. Kitamura, M. Zako, Y. Maruoka, K. Akutsu, H. Sugiyama, Y. Oue, T. Nakamura, K. Ichihara, H. Irie, S Ito, K Hirama, N Asano, T Imai, D Takano and S. Ishida, "12.3-in Highly Transparent LCD by Scattering Mode with Direct Edge Light and Field-Sequential Color-Driving Method" SID 2021 DIGEST, pp. 519-522 (2021).[3] M. Honda, K. Murata, K. Nakamura, T. Hasegawa, Y. Haseba, K. Hanaoka, S. Shimada, "Transparent Display with High-Contrast-Ratio Reverse-Mode PDLC," SID 2021 DIGEST, pp. 535-538 (2021).[4] H. Ni, J. Liu, Z. Wang, S. Yang, "A review on colorless and optically transparent polyimide films: Chemistry, process and engineering applications," Journal of Industrial and Engineering Chemistry, 28, pp16–27, (2015).[5] T. Higuchi, T. Yoshikawa, K. Hashikawa, M. Akagi, T. Yoshizawa, K. Iwawaki, Y. Ito, H. Kogoma, N. Saegusa, "See-Through Projection System" Proc. IDW ʼ15, pp. 820-821 (2015).[6] S. Ho, N. Oh, and S. Kwon, "Electro-optical properties of vertically aligned polymer network liquid crystals for normally transparent light shutters." Molecular Crystals and Liquid Crystals 644.1, pp. 130-136 (2017).Azo-AAzo-B700750200180160140120100806040200Sample10ProjectorLuminance meter302040Angle θ(degree)5060102標識の写真
元のページ ../index.html#107