公开(公告)号：US20220066263A1

公开(公告)日：2022-03-03

申请号：US17310144

申请日：2020-01-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kazuhiko Toyooka ,  Shingo Amari ,  Sayaka Kado ,  Kohei Kawahara ,  Noboru Iwata ,  Kazuhiko Minami ,  Yukio Ishizuki

IPC: G02F1/1335 ,  G02F1/13357 ,  G02F1/1333

Abstract: A backlight according to an embodiment includes a reflecting portion, a nonwoven fabric disposed opposing the reflecting portion, a reflective polarization portion disposed along a surface of the nonwoven fabric opposite to the surface of the nonwoven fabric opposing the reflecting portion, a side wall surrounding a cavity formed between the reflecting portion and the nonwoven fabric, and a light source disposed proximate the side wall and configured to illuminate light in the cavity, wherein a haze value of the nonwoven fabric is 90% or greater, an effective transmittance of the nonwoven fabric is 0.8 or greater, and a basis weight of the nonwoven fabric is 60 g/m2 or greater.

公开(公告)号：US10698208B2

公开(公告)日：2020-06-30

申请号：US16074823

申请日：2017-01-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Atsushi Ono ,  Noboru Iwata ,  Yuji Saito ,  Kentaro Tamura

IPC: G02B5/30 ,  G02B27/01 ,  B32B27/08 ,  G02B5/28 ,  G02B5/20 ,  G01C21/36

Abstract: The display device according to an embodiment of the present invention comprises: a display unit (20) emitting visible light (L2) of linearly polarized waves having display information, an infrared light-cutting section (30) transmitting the visible light (L2) from the display unit (20) and reducing an incident quantity of infrared light on the display unit (20), and a reflecting section (40) reflecting visible light (L3) transmitted through the infrared light-cutting section (30); the infrared light-cutting section (30) comprising a first polymer film (31) and a second polymer film (32) disposed on the first polymer film (31), the first polymer film (31) and the second polymer film (32) both having anisotropy of refractive indices and having a first axis (Ax1) having a highest of the refractive indices, the first axis (Ax1) of the first polymer film (31) and the first axis (Ax1) of the second polymer film (32) intersecting in a planar view.

公开(公告)号：US11822075B2

公开(公告)日：2023-11-21

申请号：US16632627

申请日：2018-07-27

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Yuji Saito ,  Noboru Iwata ,  Atsushi Ono ,  Kentaro Tamura

IPC: G02B27/01 ,  G02B5/20 ,  G02B5/30

CPC classification number: G02B27/0101 ,  G02B5/208 ,  G02B5/3033 ,  G02B5/3083 ,  G02B2027/0118

Abstract: A display device according to one aspect of the present invention includes: a display unit configured to have display information and emits visible light having a continuous spectrum; an infrared cut-off part configured to transmit the visible light from the display unit and to reduce the amount of infrared light striking the display unit; and a reflecting part configured to reflect the visible light having passed through the infrared cut-off part. The infrared cut-off part includes a first polymer film and a second polymer film, the first polymer film includes an infrared cut-off layer configured to reduce infrared light transmission, and the second polymer film includes a high-retardation polyester film and is disposed between the first polymer film and the display unit.