公开(公告)号：US09915770B2

公开(公告)日：2018-03-13

申请号：US15329662

申请日：2015-07-22

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 lens 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.

公开(公告)号：US09778411B2

公开(公告)日：2017-10-03

申请号：US15306800

申请日：2015-05-15

Applicant: Sharp Kabushiki Kaisha

Inventor： Ryuzo Yuki ,  Takeshi Ishida ,  Mitsuhiro Murata ,  Hirotoshi Yasunaga

IPC: G02F1/1339 ,  F21V8/00 ,  B60K35/00 ,  B60K37/02 ,  G02F1/1335 ,  G02F1/1333

CPC classification number: G02B6/0088 ,  B60K35/00 ,  B60K37/02 ,  B60K2350/106 ,  B60K2350/203 ,  B60K2350/2095 ,  G02B6/005 ,  G02F1/133615 ,  G02F1/1339 ,  G02F2001/133322 ,  G02F2201/46 ,  G02F2201/54

Abstract: A backlight device 12 includes LEDs 17, an optical member 16 that applies optical effects to light from the LEDs 17 and has a through hole 23 that is through a thickness thereof, and a restricting member 26 having a communication hole 27 that is communicated with the through hole 23. The restricting member 26 is inserted in the through hole 23 to be in contact with an inner surface of the through hole 23 to restrict movement of the optical member 16 along a plate surface of the optical member 16.

公开(公告)号：US09671547B2

公开(公告)日：2017-06-06

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.

公开(公告)号：US20150277029A1

公开(公告)日：2015-10-01

申请号：US14429864

申请日：2013-09-25

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Hisashi Watanabe ,  Ryuzo Yuki ,  Takeshi Ishida

IPC: F21V8/00

CPC classification number: G02B6/0088 ,  G02B6/005 ,  G02F1/133308 ,  G02F1/133615 ,  G02F2001/133314

Abstract: In a backlight (20) including a frame (22) having an opening (22a), and a light guide plate assembly (23) disposed inside the frame (22) and having a light guide plate (24) and a light source (25), the backlight being configured to emit illumination light through the opening (22a), the frame (22) is formed by bending a metal plate and includes a bottom surface portion (22b) facing a rear surface of the light guide plate (24), a peripheral surface portion (22c) standing on a peripheral edge of the bottom surface portion (22b), and an upper surface portion (22d) bent from an upper end of the peripheral surface portion (22c) to form a peripheral edge of the opening, and an outer shape of the light guide plate assembly (23) is smaller than the opening (22a).

Abstract translation: 在包括具有开口（22a）的框架（22）和布置在框架（22）内部并具有导光板（24）和光源（25）的导光板组件（23）的背光源（20） ），所述背光被配置为通过所述开口（22a）发射照明光，所述框架（22）通过弯曲金属板形成并且包括面向所述导光板（24）的后表面的底面部分（22b） ，位于所述底面部（22b）的周缘部的周面部（22c）和从所述周面部（22c）的上端弯曲的上表面部（22d），形成所述外周面 开口和导光板组件（23）的外形小于开口（22a）。

公开(公告)号：US11003018B2

公开(公告)日：2021-05-11

申请号：US16612933

申请日：2018-05-10

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Takeshi Ishida

IPC: G02F1/13357 ,  H01L33/50 ,  G02F1/1335

Abstract: Provided is a backlight unit (2) including a light source (4) where multiple light-emitting elements (8) are two-dimensionally laid out, and a wavelength converting member (6) that has a phosphor (12), and that converts a wavelength of light from the light source, where a wavelength conversion capability varies in accordance with a distance to a light-emitting element that is closest of the multiple light-emitting elements, in order to reduce color unevenness that occurs depending on difference in distance between the light source and wavelength converting member of the backlight unit.

公开(公告)号：US20200019016A1

公开(公告)日：2020-01-16

申请号：US16507627

申请日：2019-07-10

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Taimi Oketani ,  Atsushi Ban ,  Yasuhisa Itoh ,  Takeshi Ishida

IPC: G02F1/1335 ,  H01L25/075 ,  H01L33/62 ,  H01L33/00

Abstract: A chip-mounted board including: micro light-emitting chips arranged in a matrix pattern in a light-emitting region; and a conductive line electrically connected to the micro light-emitting chips, the light-emitting region including a first region having a first luminance, a second region having a second luminance lower than the first luminance, and a third region having a third luminance lower than the first luminance and higher than the second luminance, the luminances being values determined with the same magnitude of current supplied to the micro light-emitting chips, the third region being positioned between the first region and the second region and satisfying the following formulas (1) and (2): (1+k)/(1−k)≤63.895×tan(0.5°)×500/W+6.0525  (1) L2=k×L1  (2) wherein L1 represents the first luminance, L2 represents the second luminance, and W represents a width (unit: mm) of the third region.

公开(公告)号：US20190317364A1

公开(公告)日：2019-10-17

申请号：US15953686

申请日：2018-04-16

Applicant: Sharp Kabushiki Kaisha

Inventor： David James Montgomery ,  Takeshi Ishida

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/1343 ,  H05B33/08 ,  G09G3/32 ,  G09G3/36

Abstract: A backlight assembly includes a light source, a light guide optically coupled to the light source that receives light from the light source, a substrate including an electrode layer and a hydrophobic surface located on the electrode layer, wherein the hydrophobic surface of the substrate is spaced apart from a surface of the light guide to define a cell gap, and a plurality of conductive liquid beads located within the cell gap. Liquid beads that are subject to an actuation voltage applied to the electrode layer are in an actuated state, and liquid beads that are not subject to an actuation voltage applied to the electrode layer are in a non-actuated state. When the liquid beads are in the non-actuated state, the liquid beads are in contact with the surface of the light guide for extracting light from the light guide, and when the liquid beads are in the actuated state, the liquid beads deform such that contact of the liquid beads with the surface of the light guide is reduced relative to the non-actuated state to reduce extraction of light from the lightguide, thereby dimming the backlight assembly.

公开(公告)号：US10209432B2

公开(公告)日：2019-02-19

申请号：US15550798

申请日：2016-02-05

Applicant: Sharp Kabushiki Kaisha

Inventor： Mitsuhiro Murata ,  Ryuzo Yuki ,  Hisashi Watanabe ,  Shinya Kadowaki ,  Takeshi Ishida ,  Takeshi Masuda

IPC: F21V8/00

Abstract: A backlight device (12) includes a light guide plate (14), and LEDs (17), and wiring portions (18c). The light guide plate (14) has a substantially circular outer shape and has fan-shaped areas (SA) defined by segment lines (SL) extending through a center (C) thereof. All the segment lines (SL) meet at the center (C). The LEDs (17) are arranged such that middle positions between LEDs (17) each located at an end in the circumferential direction in the respective sets of the LEDs (17) provided for the fan-shaped areas (SA) adjacent to each other in the circumferential direction coincides with the segment lines (SL). The wiring portions (18c) are equal or larger in number than the LEDs (17) included in each of the sets of LEDs (17) provided for the fan-shaped areas (SA) and are configured to supply electric power to the respective LEDs (17).

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：US10018868B2

公开(公告)日：2018-07-10

申请号：US15539831

申请日：2015-12-18

Applicant: Sharp Kabushiki Kaisha

Inventor： Takeshi Masuda ,  Ryuzo Yuki ,  Hisashi Watanabe ,  Shinya Kadowaki ,  Mitsuhiro Murata ,  Takeshi Ishida

IPC: G02F1/1335 ,  F21V5/02 ,  F21V5/04 ,  G02F1/1333

CPC classification number: G02F1/1335 ,  F21V5/02 ,  F21V5/048 ,  G02F1/133308 ,  G02F1/133615 ,  G02F2001/133317 ,  G02F2001/133337 ,  G02F2001/133388 ,  G02F2201/56

Abstract: A backlight device includes: optical members with a substantially circular profile, including a light guide plate, optical sheets, and a reflective sheet; a chassis (lamination member) disposed to overlap the light guide plate, the optical sheets, and the reflective sheet (optical members); and positioning structures. The positioning structures are provided on the light guide plate, the optical sheets, and the reflective sheet (optical members) and on the chassis (lamination member). The positioning structures have contact faces that come into contact with each other in the circumferential direction of the light guide plate, the optical sheets, and the reflective sheet (optical members), so as to position the light guide plate, the optical sheets, and the reflective sheet (optical member) relative to the chassis (lamination member) in the circumferential direction.