公开(公告)号：US20180107068A1

公开(公告)日：2018-04-19

申请号：US15847572

申请日：2017-12-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hisanori SASAKI ,  Yoshikazu YAMANO ,  Yasuhiro KUMAMOTO

IPC: G02F1/1335

Abstract: A backlight device includes a plurality of light sources arranged in a shape of a matrix, a reflective sheet having partition walls arranged to surround each of the plurality of light sources in four directions and reflecting light emitted from the plurality of light sources, a luminance uniformity plate located above the reflective sheet and uniforming luminance of the light emitted from the plurality of light sources and light reflected by the reflective sheet, and a diffuser panel located above the luminance uniformity plate and diffusing light exiting from the luminance uniformity plate. A gap between the partition wall and the luminance uniformity plate is 5% to 30% of an optical distance defined by a distance between the reflective sheet and, the diffuser panel, and a gap between the luminance uniformity plate and the diffuser panel is not greater than 50% of the optical distance.

公开(公告)号：US20180107067A1

公开(公告)日：2018-04-19

申请号：US15847564

申请日：2017-12-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshikazu YAMANO ,  Hisanori SASAKI ,  Yasuhiro KUMAMOTO

IPC: G02F1/1335

Abstract: A backlight device includes a plurality of light sources arranged in a shape of a matrix, a reflective sheet having partition walls arranged to surround each of the plurality of light sources in four directions and reflecting light emitted from the plurality of light sources, a luminance uniformity plate located above the reflective sheet and uniforming luminance of the light emitted from the plurality of light sources and light reflected by the reflective sheet, and a support member supporting the luminance uniformity plate. The reflective sheet has an opening portion in a portion, of at least one partition wall of the partition walls arranged in the four directions, which is other than four corners, and the support member has a shield portion disposed in the opening portion and shielding the opening portion.

公开(公告)号：US20180239197A1

公开(公告)日：2018-08-23

申请号：US15962828

申请日：2018-04-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yoshikazu YAMANO ,  Hisanori SASAKI ,  Yasuhiro KUMAMOTO

IPC: G02F1/1335

CPC classification number: G02F1/133611 ,  G02F1/133605 ,  G02F1/133606 ,  G02F1/133608 ,  G02F2001/133601

Abstract: A backlight device includes: a reflection sheet having a reflection surface which is divided into a plurality of reflection regions by a plurality of partitions that are each a ridge-shaped projection; light sources disposed in the respective reflection regions; a luminance uniformizing plate that transmits light incident from a first surface opposed to the reflection surface, and emits the light from the second surface; and a diffusion plate that diffuses and emits the light emitted from the second surface. The luminance uniformizing plate includes a high light-transmittance region between a region opposed to each of the light sources and a region opposed to a vertex portion of a corresponding one of the plurality of partitions, the high light-transmittance region being higher in light-transmittance per unit area than the region opposed to the light source and the region opposed to the vertex portion.

公开(公告)号：US20180233094A1

公开(公告)日：2018-08-16

申请号：US15750883

申请日：2016-08-30

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yasuhiro KUMAMOTO ,  Takeichi SHINYA ,  Koujirou HIGA ,  Masaaki OFUJI ,  Taizou TAKEUCHI ,  Tadahiro KUGIMARU

IPC: G09G3/36 ,  G02F1/1333 ,  G02F1/1335

Abstract: A video display device includes a display panel that displays an image based on an image signal, and a light source substrate disposed on a rear side of the display panel. The light source substrate includes a plurality of light emitting elements disposed on a surface of the light source substrate on a side toward the display panel, and a plurality of driver elements that are disposed on the same surface of the light source substrate as the surface to which the plurality of light emitting elements are attached, and drive each of the plurality of light emitting elements.