公开(公告)号：US20200319503A1

公开(公告)日：2020-10-08

申请号：US16303640

申请日：2017-05-16

Applicant: SHARP KABUSHIKI KAISHA

Inventor： TAKUYA OOTANI ,  KIYOSHI MINOURA ,  TAKASHI SATOH

IPC: G02F1/1335 ,  G02F1/1337 ,  G02F1/13363 ,  G02F1/1362

Abstract: A reflective liquid crystal display device has a first substrate having a first electrode that reflects light; a second substrate having a second electrode that transmits light; a liquid crystal layer provided between the first electrode and the second electrode, including a nematic liquid crystal material having negative dielectric anisotropy Δε and a chiral agent, having nearly vertical alignment when no voltage is applied, and having twist alignment or hybrid alignment when white voltage is applied; and a polarizing layer provided on the observer side of the second substrate and at least one retarder layer disposed between the polarizing layer and the second substrate, wherein the reflective liquid crystal display device has a drive circuit that applies black voltage or white voltage across the liquid crystal layer at a frame rate of 1 fps or less, and when applying white voltage across the liquid crystal layer over a plurality of frames, the drive circuit applies the white display voltage whose polarity is inverted for each frame with respect to the potential of the second electrode, and assuming that a natural pitch of the nematic liquid crystal material including the chiral agent is p, that a thickness of the liquid crystal layer is d, and that a birefringence of the nematic liquid crystal material is Δn, 60°

公开(公告)号：US20180364525A1

公开(公告)日：2018-12-20

申请号：US16060907

申请日：2017-01-24

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KOJI MURATA ,  MASAKAZU KAMURA ,  TAKASHI KATAYAMA ,  MITSURU CHIDA ,  TAKUYA OOTANI ,  EMI YAMAMOTO

IPC: G02F1/1335 ,  G02F1/1337 ,  G02F1/1343 ,  F21V8/00

Abstract: A wavelength conversion substrate according to one aspect of the present invention includes: a first substrate having an optical transparency; and a light modulation unit provided on one surface of the first substrate and configured to modulate a spectrum of incident light in accordance with a polarization state of the incident light. The light modulation unit includes: a plurality of metallic structures periodically provided at intervals from one another on one surface of the first substrate and configured to exhibit plasmon resonance due to incident light; and a plurality of wavelength conversion units provided so that at least some wavelength conversion units are adjacent to the plurality of metallic structures and comprising a wavelength converting material configured to emit light in a wavelength band different from a wavelength band of the incident light.