公开(公告)号：US10809569B2

公开(公告)日：2020-10-20

申请号：US15750874

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: G02F1/13357 ,  F21S2/00 ,  G09F9/00 ,  F21V7/00 ,  G09G3/34

Abstract: A video display device includes: a display panel that displays an image based on an input image signal; a light source substrate that includes a plurality of light sources on a main surface which is a front side of the light source substrate, and emits, toward a rear side of the display panel, light emitted from the plurality of light sources; a reflection sheet that is provided on the main surface of the light source substrate, and in which hollow partitioning walls each of which separates adjacent two light sources of the plurality of light sources are formed; an optical member that is provided between the display panel and the light source substrate, and uniformizes luminance distribution of the light emitted from the light source substrate; and support members each of which is provided between the light source substrate and the optical member, and supports the optical member. The reflection sheet includes intersection portions where the partitioning walls formed in a first direction and the partitioning walls formed in a second direction crossing the first direction cross each other, and further includes linear portions formed in parallel with the first direction or the second direction. Each of the support members is disposed in a recess portion formed in a corresponding linear portion.

公开(公告)号：US11862082B2

公开(公告)日：2024-01-02

申请号：US17765235

申请日：2020-10-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takeichi Shinya

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/02 ,  G09G2320/0626 ,  G09G2360/144

Abstract: An image display device includes a display panel, a space portion, an illuminator, a controller, and an illuminance sensor. The display panel is switchable between an image display mode in which an image is displayed and a transmissive mode in which the display panel is in a transmissive state where a back side of the display panel is visible in a front view. The space portion and the illuminator are provided behind the display panel. The illuminator emits illumination light to the space portion. The controller controls the illuminator. The illuminance sensor detects an ambient illuminance of the image display device. The controller performs illumination control for causing the illuminator to emit illumination light with a brightness that is in accordance with a result of detection by the illuminance sensor when the display panel is operating in the transmissive mode.

公开(公告)号：US10976601B2

公开(公告)日：2021-04-13

申请号：US15750881

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: F21V8/00 ,  F21K9/00 ,  G02F1/13357 ,  F21K9/62

Abstract: A video display device includes: a display panel that displays an image based on an input image signal; a light source substrate that includes a plurality of light sources on a main surface which is a front side of the light source substrate, and emits, toward a rear side of the display panel, light emitted from the plurality of light sources; a reflection sheet that is provided on the main surface of the light source substrate, and in which hollow partitioning walls each of which separates adjacent two light sources of the plurality of light sources are formed; and an optical member that has a plate shape, is provided between the display panel and the light source substrate, and uniformizes luminance distribution of the light emitted from the light source substrate. The reflection sheet extends to an outside of an outer peripheral edge of the optical member as viewed from the front side.

公开(公告)号：US10663793B2

公开(公告)日：2020-05-26

申请号：US15754208

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 ,  Ryou Shimotaya

IPC: G02F1/1335 ,  F21V23/06 ,  G09G3/36 ,  G09G3/34 ,  G09F9/00 ,  H05K1/02 ,  F21V23/00 ,  F21S2/00 ,  F21V19/00 ,  G09G3/20 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/13357

Abstract: A video display device includes a liquid crystal display panel, and light source substrates configured to illuminate the liquid crystal display panel from a rear side of the liquid crystal display panel. Each of the light source substrates includes a plurality of light emitting diodes each of which is provided in corresponding one of areas different from each other in the liquid crystal display panel, and driver elements which drive each of the plurality of light emitting diodes such that light is emitted with luminance corresponding to brightness within a corresponding area of an image in accordance with a control signal. First conductive foil is disposed on a first main surface of the light source substrate on which the light emitting diodes are provided. Second conductive foil is disposed on a second main surface of the light source substrate on a side opposite to the first main surface. Ground pattern foil is disposed as the second conductive foil on the second main surface in regions each of which includes a corresponding one of the plurality of light emitting diodes in a plan view. The first conductive foil and the second conductive foil have a substantially equivalent area.