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：US20210041621A1

公开(公告)日：2021-02-11

申请号：US17080214

申请日：2020-10-26

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shuji YAMASHITA ,  Hisanori SASAKI ,  Satoru SHIBATA

IPC: F21V8/00 ,  G02F1/1333 ,  G02F1/1335

Abstract: A liquid crystal display apparatus includes a quadrangular liquid crystal panel having a reflection layer on a back surface opposite to a display surface, a light guiding plate that diffusely reflects light incident from one end surface of the light guiding plate toward the display surface, a back-side frame disposed in parallel with the liquid crystal panel on a side opposite to the light guiding plate, and a light source holding plate including a light source fixing plate that faces the one end surface and a fixing plate portion fixed to a surface of the back-side frame on a side opposite to the liquid crystal panel. A light source is mounted on the light source fixing plate, and the fixing plate portion is formed so as to be bent perpendicularly to the light source fixing plate.

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：US20210080643A1

公开(公告)日：2021-03-18

申请号：US17103747

申请日：2020-11-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shuji YAMASHITA ,  Hisanori SASAKI ,  Satoru SHIBATA

IPC: F21V8/00 ,  G02F1/1335

Abstract: A liquid crystal display device includes a liquid crystal panel having a reflection layer on a back surface opposite to a display surface of the liquid crystal panel, a light-guiding plate being closely fixed to the display surface and configured to diffusely reflect light incident and emit the light toward the display surface, a light source holding plate having a light source fixing plate on which a light source is mounted, and a back-side frame that includes a back-side portion disposed in parallel with the back surface of the liquid crystal panel and supported by the light source holding plate. A pair of positioning bent portions that are bent perpendicularly from the back-side portion and support the one end surface are formed on both sides at a lower end edge of the back-side portion along the one end surface.

公开(公告)号：US20210055605A1

公开(公告)日：2021-02-25

申请号：US17080053

申请日：2020-10-26

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shuji YAMASHITA ,  Hisanori SASAKI ,  Satoru SHIBATA

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/1333

Abstract: A liquid crystal display apparatus includes a quadrangular liquid crystal panel, a light guiding plate formed in a quadrangular shape substantially the same as that of the liquid crystal panel and having a pair of convex portions that protrude outward from a pair of end surfaces, and a frame having a light source holding plate in which a light source is mounted on a light source fixing plate, the light source fixing plate facing the one end surface, the back-side portion being formed in a quadrangular shape substantially the same as that of the liquid crystal panel. Bent side plate portions, which face the pair of end surfaces, are respectively provided on a pair of side portions of the back-side portion. Notches, into which the convex portions are fitted, are provided in the pair of bent side plate portions.

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.