公开(公告)号：US11703625B2

公开(公告)日：2023-07-18

申请号：US17728443

申请日：2022-04-25

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Shugo Yagi ,  Takeshi Masuda ,  Yuuichi Kanbayashi

IPC: F21V8/00

CPC classification number: G02B6/0028 ,  G02B6/003 ,  G02B6/0016 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0045

Abstract: A lighting device includes light sources arranged in an arrangement direction, a first light guide plate, and a second light guide plate on the first light guide plate. The first light guide plate includes a first light entering surface, a first light exit surface, and a first light diffusion portion adding a diffusion action to light to be refracted and travel in a crossing direction crossing the arrangement direction. The second light guide plate includes a second light entering surface, a second light exit surface, and a second light diffusion portion adding a diffusion action to light to be refracted and travel in the arrangement direction seen from the normal direction of the second light exit surface. The second light diffusion portion includes first lenses that include ridgelines extending in the crossing direction and inclined portions inclined at an angle from 35° to 55° inclusive relative to the normal direction.

公开(公告)号：US10353237B2

公开(公告)日：2019-07-16

申请号：US15533954

申请日：2015-12-03

Applicant: Sharp Kabushiki Kaisha

Inventor： Yoshinobu Hirayama ,  Takao Imaoku ,  Shugo Yagi

IPC: G02F1/1335 ,  F21V8/00

Abstract: A lighting device includes LEDs 17, and a light guide plate 19 including an edge surface and a pair of plate surfaces, a part of the edge surface being a light entrance surface 19B through which light from the LEDs 17 enters, and one of the plate surfaces being a light exit surface 19A through which the light exits and another one of the plate surfaces being an opposite plate surface 19C opposite from the light exit surface 19A. The light guide plate 19 includes prism portions 51 on the opposite plate surface 19C, projecting from the opposite plate surface 19C and arranged in the X-axis direction and configured to collect light toward in a normal direction of the light exit surface 19A, and an exit light reflection portion 60 provided in a recessed portion 52 that is formed by two adjacent prism portions 51 and configured to reflect light travelling within the light guide plate 19 and facilitate exiting of light from the light guide plate 19.

公开(公告)号：US09921360B2

公开(公告)日：2018-03-20

申请号：US15107902

申请日：2014-12-18

Applicant: Sharp Kabushiki Kaisha

Inventor： Yoshinobu Hirayama ,  Shugo Yagi ,  Toru Inata

IPC: F21V8/00

CPC classification number: G02B6/0038 ,  G02B6/0036 ,  G02B6/0053 ,  G02B6/0061 ,  G02B6/0085

Abstract: A backlight device is provided with: LEDs; a light guide plate having a light-receiving face, a light-exiting surface, and an opposite plate surface; a prism sheet including a plurality of light-exiting side unit prisms aligned along a second direction; a light-exiting surface-side prism portion including a plurality of light-exiting surface-side prism units aligned along the second direction; a light emission reflection portion including a plurality of reflection units aligned along a first direction at an interval; an opposite plate surface-side prism portion including a plurality of opposite plate surface-side unit prisms aligned along the second direction; and bow-shaped portions disposed into such a form as to be adjacent to the light-exiting surface-side prism units in the second direction while extending along the first direction, the bow-shaped portions having a bow-shaped cross-section.

公开(公告)号：US20150131309A1

公开(公告)日：2015-05-14

申请号：US14395895

申请日：2013-04-18

Applicant: Sharp Kabushiki Kaisha

Inventor： Ichiro Umekawa ,  Hirofumi Oosawa ,  Takeshi Ishida ,  Ryuzo Yuki ,  Masaki Kageyama ,  Shugo Yagi

IPC: F21V8/00

CPC classification number: G02B6/0053 ,  G02B6/0011 ,  G02B6/0038 ,  G02B6/0073

Abstract: Provided are an illumination device capable of improving the uniformity in brightness of the illumination light, and a display device using the same. An illumination device is provided with: a plurality of light sources arranged in a row in one direction; and a light guide plate which has, along a side edge face, a light receiving face facing the light source, guides light entering through the light receiving face, and outputs illumination light from a light emitting surface disposed on the front surface; the light guide plate having a plurality of prisms and a plurality of prisms provided in an indented manner on the front or rear surface and arranged in a row along the longitudinal direction of the light receiving face; the prisms being formed spanning between the light receiving face and the opposing face opposite the light receiving face; and the prisms being formed, between adjacent prisms, deeper than the prisms within a predetermined range in the vicinity of the light receiving face.

Abstract translation: 提供能够提高照明光的亮度的均匀性的照明装置和使用其的显示装置。 照明装置设置有：沿一个方向排列成一列的多个光源; 以及导光板，其沿着侧面设有面向所述光源的受光面，引导从所述受光面入射的光，并且从设置在所述前表面的发光面输出照明光; 所述导光板具有多个棱镜和多个棱镜，所述多个棱镜设置在所述前表面或后表面上并且沿着所述光接收面的纵向方向排成一列; 所述棱镜形成跨越在所述光接收面和与所述光接收面相对的所述相对面之间; 并且在相邻棱镜之间形成的棱镜比光接收面附近的预定范围内的棱镜深。

公开(公告)号：US11143915B2

公开(公告)日：2021-10-12

申请号：US17018601

申请日：2020-09-11

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Shugo Yagi ,  Takeshi Masuda ,  Satoshi Tsubooka ,  Yuuichi Kanbayashi

IPC: G02F1/13357 ,  F21V8/00 ,  G02F1/1335

Abstract: A lighting device includes light sources arranged in a row in an arrangement direction, alight guide plate disposed to cover the light sources and including a plate surface facing the light sources and an opposite plate surface opposite from the plate surface, and a light diffusion portion. A portion of the plate surface is a light entering surface and the opposite plate surface is a light exit surface. The light diffusion portion extends in the arrangement direction of the light sources and on the light exit surface such that a portion of the light diffusion portion overlaps the light sources. The light diffusion portion applies a diffusion effect to light that is within the light guide plate so as to travel in a direction crossing the arrangement direction and to be away from the light sources seen from a normal direction of the light exit surface.

公开(公告)号：US10310164B2

公开(公告)日：2019-06-04

申请号：US15533946

申请日：2015-12-03

Applicant: Sharp Kabushiki Kaisha

Inventor： Yoshinobu Hirayama ,  Takao Imaoku ,  Shugo Yagi

IPC: G02B6/00 ,  F21V8/00 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/1337

Abstract: A lighting device includes a light guide plate, a plurality of LEDs positioned to project light into a first side surface of the light guide plate, a reflection sheet facing a bottom surface of the light guide plate, a plurality of reflective elements on a light exit surface of the light guide plate opposite the bottom surface and extending in a direction parallel to the first side surface, and a plurality of convex elements on the bottom surface of the light guide plate. The density of the convex elements increases with increasing distance from the light source.

公开(公告)号：US10180527B2

公开(公告)日：2019-01-15

申请号：US15124722

申请日：2015-02-19

Applicant: Sharp Kabushiki Kaisha

Inventor： Ryuzo Yuki ,  Takeshi Ishida ,  Takao Imaoku ,  Yoshinobu Hirayama ,  Shugo Yagi

IPC: G02B6/00 ,  F21V8/00 ,  G02F1/1333

Abstract: A backlight unit includes a light emission reflecting portion, first reflecting protrusions, and second reflecting protrusions. The light emission reflecting portion includes unit reflecting portions that include main reflecting surfaces and light reentering surfaces arranged opposite to the main reflecting surfaces, respectively. The first reflecting protrusions include extended main reflecting surfaces that continue to the main reflecting surfaces, respectively, and first auxiliary reflecting surfaces that reflect rays of light traveling toward an opposite plate surface and direct the rays of light toward the main reflecting surfaces and the extended main reflecting surfaces. The second reflecting protrusions include extended light reentering surfaces that continue to the light reentering surfaces, respectively, and second auxiliary reflecting surfaces that reflect rays of light entering through at least one of the light reentering surfaces and the extended light reentering surfaces and direct the rays of light toward the light exiting surface.

公开(公告)号：US09690034B2

公开(公告)日：2017-06-27

申请号：US14414511

申请日：2013-07-23

Applicant: Sharp Kabushiki Kaisha

Inventor： Ichiro Umekawa ,  Hirofumi Oosawa ,  Takeshi Ishida ,  Ryuzo Yuki ,  Masaki Kageyama ,  Shugo Yagi

IPC: F21V7/04 ,  F21V8/00

CPC classification number: G02B6/0038 ,  G02B6/0016 ,  G02B6/0053 ,  G02B6/0055 ,  G02B6/0068 ,  G02B6/0073

Abstract: An illumination device (10) is provided with the following: light sources (11); a light-guide member (12 (13)) that includes a light entry region (Is) and a light exit region (Os) which emits planar light; light entry portions (13a) that are formed in the light entry region (Is) and that oppose the light sources (11); and bright line suppression portions (20) that are formed in the areas between the light entry portions (13a) at the front side of the light entry region (Is), and that include bright line suppression prisms (21) which have a shape that changes the angle of the light emitted in a direction spreading out from the light sources (11) to a direction closer to the optical axes.

公开(公告)号：US10928578B2

公开(公告)日：2021-02-23

申请号：US16747302

申请日：2020-01-20

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Shugo Yagi ,  Takeshi Ishida ,  Yuuichi Kanbayashi ,  Satoshi Tsubooka

IPC: F21V8/00

Abstract: First and second prism sheets have pluralities of first and second unit prisms, respectively, arranged along a first direction and extending along a second direction, each of which has a base that is parallel to the first direction and a pair of oblique sides standing from both ends, respectively, of the base, and an angle that a second LED facing oblique side, which is one of the oblique sides that faces toward the LED, forms with respect to the base in the first direction in the second unit prism is smaller than an angle that a first LED facing oblique side that faces toward the LED forms with respect to the base in the first direction in the first unit prism.

公开(公告)号：US09971081B1

公开(公告)日：2018-05-15

申请号：US15881849

申请日：2018-01-29

Applicant: Sharp Kabushiki Kaisha

Inventor： Yoshinobu Hirayama ,  Takao Imaoku ,  Takeshi Ishida ,  Ryuzo Yuki ,  Shugo Yagi

IPC: F21V7/04 ,  F21V8/00 ,  G02F1/1333

CPC classification number: G02B6/0038 ,  G02B6/00 ,  G02B6/0036 ,  G02B6/0053 ,  G02B6/0055 ,  G02B6/0061 ,  G02B6/0085 ,  G02B6/0088 ,  G02B6/009 ,  G02F1/133308 ,  G02F2001/133314 ,  G02F2001/133317

Abstract: A backlight unit includes LEDs, a light guide plate, a prism sheet, exiting light reflecting portions, prisms, concave lenticular lenses, and flat portions. The concave lenticular lenses are configured such that an occupancy rate of concave cylindrical lenses with respect to the second direction is higher in an area closer to a light entering surface with respect to the first direction and the occupancy rate is lower in an area farther from the light entering surface. The flat portions are formed adjacent to the concave cylindrical lenses with respect to the second direction such that an occupancy rate of flat portions with respect to the second direction is lower in an area closer to a light entering surface with respect to the first direction and the occupancy rate of the flat portions with respect to the second direction is higher in an area farther from the light entering surface.