公开(公告)号：US20200235268A1

公开(公告)日：2020-07-23

申请号：US16482813

申请日：2018-02-02

Applicant: ENPLAS CORPORATION

Inventor： Masayo TAKIZAWA ,  Akinobu SEKI

IPC: H01L33/58 ,  H01L25/075

Abstract: This planar light source device has a pair of substrates, a pair of irradiation plates disposed between the pair of substrates, and a plurality of light emission devices disposed on one or both of the pair of substrates. In a cross-section of the light emission devices in a direction perpendicular to the irradiation plates through an optical axis, the luminosity of light emitted in a 7.0° direction when 0° is the optical axis direction and the luminosity of light emitted in a (tan−1(t/L))° (where t represents the gap between the irradiation plates, and L represents the gap, in a direction along the pair of irradiation plates, from the surface of a light emission device disposed on one of the substrates to an end part of the other-substrate-side irradiation plate) direction or a (tan−1(t/2L))° direction satisfy a prescribed relationship.

公开(公告)号：US20180128430A1

公开(公告)日：2018-05-10

申请号：US15572275

申请日：2016-04-21

Applicant: Enplas Corporation

Inventor： Kyouhei YAMADA ,  Akinobu SEKI ,  Masayo TAKIZAWA

IPC: F21K9/237 ,  F21K9/232 ,  F21V3/00 ,  F21K9/235

CPC classification number: F21K9/237 ,  F21K9/232 ,  F21K9/235 ,  F21K9/69 ,  F21V3/00 ,  F21V3/049 ,  F21V3/0615 ,  F21V3/0625 ,  F21V5/045 ,  F21V5/046 ,  F21Y2103/33 ,  F21Y2115/10 ,  G02B19/0028 ,  G02B19/0061 ,  G02B19/0066

Abstract: A light beam control member according to the present invention comprises: an incidence surface including a first incidence surface arranged spaced apart from a center axis, and a second incidence surface arranged by surrounding the first incidence surface; an upper total reflection surface arranged opposite the incidence surface, and causing the light incident on the incidence surface to reflect in a direction away from the center axis; a lower total reflection surface arranged between the center axis and the first incidence surface and surrounding the center axis, and causing part of the light incident on the first incidence surface to reflect toward the upper total reflection surface; and an emission surface arranged outside the upper total reflection surface and surrounding the center axis, and causing the light reflected from the upper total reflection surface to be emitted to the outside.

公开(公告)号：US20210072596A1

公开(公告)日：2021-03-11

申请号：US16640379

申请日：2018-08-15

Applicant: Enplas Corporation

Inventor： Kyouhei YAMADA ,  Masayo TAKIZAWA

IPC: G02F1/13357

Abstract: According to the present invention, a luminous flux control member of a light emitting device has an incident surface, a back surface, a reflection surface, an emission surface, and a first recessed portion. The first recessed portion includes a first inclined surface. With respect to a direction along the optical axis, a front end of the first inclined surface is positioned further toward the back side than light which is emitted from the center of a light emitting surface of a light emitting element, incident on the incident surface, reflected from the reflection surface, and transmitted toward the emission surface, and is positioned further toward the front side than light which is directly transmitted toward the emission surface without being emitted from an end on the light emitting surface of the light emitting element, incident on the incident surface, and passing by the reflection surface.

公开(公告)号：US20160053971A1

公开(公告)日：2016-02-25

申请号：US14824329

申请日：2015-08-12

Applicant: Enplas Corporation

Inventor： Masayo TAKIZAWA

IPC: F21V13/04 ,  G09F13/22 ,  F21V7/00 ,  F21V5/08 ,  G02B17/08 ,  F21V5/04

CPC classification number: G09F13/22 ,  G02B17/086 ,  G02B27/30

Abstract: A light flux controlling member includes an incidence surface, a reflection surface and an emission surface. The incidence surface includes a top surface and a side surface. The top surface is divided by a first plane into a first top surface and a second top surface. In the cross-section taken along a second plane including the central axis and perpendicular to the first plane, an angle between the tangent to the first top surface and the central axis is larger than an average angle between the tangent to the second top surface and the central axis. The emission surface includes a first emission surface and a second emission surface. In the cross-section taken along the second plane, an average angle between the tangent to the first emission surface and the central axis is smaller than an average angle between the tangent to the second emission surface and the central axis.

Abstract translation: 光束控制构件包括入射面，反射面和发射面。 入射表面包括顶表面和侧表面。 顶表面被第一平面划分成第一顶表面和第二顶表面。 在沿着包括中心轴线并垂直于第一平面的第二平面截取的横截面中，第一顶表面的切线与中心轴线之间的角度大于与第二顶表面的切线和 中心轴。 发射表面包括第一发射表面和第二发射表面。 在沿着第二平面截取的横截面中，第一发射表面的切线与中心轴线之间的平均角度小于第二发射表面的切线与中心轴线之间的平均角度。

公开(公告)号：US20240385420A1

公开(公告)日：2024-11-21

申请号：US18663292

申请日：2024-05-14

Applicant: Enplas Corporation

Inventor： Masayo TAKIZAWA

IPC: G02B17/08 ,  A61L2/10 ,  A61L2/26

Abstract: A light flux controlling member includes: an incidence surface, two total reflection surfaces, two first emission surfaces, and a second emission surface. The two total reflection surfaces are each a part of a surface that is obtained through rotation with a virtual half straight line as a rotation axis. The two virtual half straight lines each intersect the first emission surface. In plan view of the light flux controlling member, one ends of the two virtual half straight lines are located at the same point on the second axis, and an angle between the two virtual half straight lines is smaller than 180°. The angle between the two virtual half straight lines is formed on a side on which an area of the second emission surface is larger with respect to the first axis.

公开(公告)号：US20190011086A1

公开(公告)日：2019-01-10

申请号：US15739793

申请日：2016-06-24

Applicant: Enplas Corporation

Inventor： Akinobu SEKI ,  Masayo TAKIZAWA

IPC: F21K9/232 ,  F21K9/69 ,  F21V3/06 ,  F21V5/04 ,  G02B5/02 ,  H01L33/58

Abstract: A portion of the light from the light emitted by a light-emitting element enters the entrance region, then, is reflected by the first reflective surface on the same side as this entrance region with respect to the optical axis serving as a boundary, and is caused to exit from the second reflective surface on this same side. Another portion of the light enters the entrance region, is reflected by the second reflective surface and the third reflective surface, in this order, on the same side as this entrance region with respect to the optical axis serving as the boundary, is then caused to exit from the connection surface on this same side, re-enters from the first reflective surface or the connection surface on the opposite side with respect to the optical axis, and is then caused to exit from the second reflective surface on this opposite side.