公开(公告)号：US20180210129A1

公开(公告)日：2018-07-26

申请号：US15744855

申请日：2016-09-23

Applicant: SHARP KABUSHIKI KAISHA

Inventor： MAKOTO UNO ,  AKIRA GOTOU ,  KEITARO MATSUI ,  MASANOBU HARADA

IPC: F21V8/00

CPC classification number: G02B6/0023 ,  F21S2/00 ,  G02B5/08 ,  G02B5/20 ,  G02B6/0043 ,  G02B6/005 ,  G02B6/0055 ,  G02B6/0061 ,  G02B6/0068 ,  G02B6/0088 ,  H01L33/50

Abstract: A lighting device includes a light source array, a wavelength converting member, and a light guide plate. The light source array includes light sources configured to emit primary light rays. The wavelength converting member includes a wavelength converting portion, a holding portion, and non-wavelength converting portions. The wavelength converting portion contains phosphors configured to emit secondary light rays when excited by the primary light rays. The wavelength converting member is disposed between the light guide plate and the light source array. The light guide plate includes a light entering surface, a light exiting surface, an opposite surface that is on an opposite side from the light exiting surface, and a light reflecting and scattering pattern. The light reflecting and scattering pattern includes complementary color dots formed in sections of the opposite surface on non-wavelength converting portion sides. The complementary color dots absorb the primary light rays.

公开(公告)号：US20190122619A1

公开(公告)日：2019-04-25

申请号：US16091896

申请日：2017-02-21

Applicant: SHARP KABUSHIKI KAISHA

Inventor： YASUSHI ASAOKA ,  TOMOKO UEKI ,  SHO OCHI ,  MAKOTO UNO

IPC: G09G3/36 ,  G09G3/20 ,  G02F1/1337 ,  G02F1/137

Abstract: A liquid crystal display device of one aspect of the present invention includes a liquid crystal display unit that includes a liquid crystal layer which exhibits vertical alignment and plural picture elements, and a control unit that controls a voltage which is supplied to the liquid crystal display unit. The control unit performs display by sequentially applying a first voltage that corresponds to a larger gradation number than an original gradation number and a second voltage that corresponds to zero gradation respectively in plural subframe periods that result from division of one frame period of an image signal in a case where the original gradation number of the input image signal is a low gradation number that is less than a prescribed threshold value, performs display by applying the second voltage in the one frame period in a case where the original gradation number is the zero gradation, and performs display by applying a third voltage that corresponds to the original gradation number in the one frame period in a case where the original gradation number is a high gradation number that is equivalent to or more than the threshold value.