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公开(公告)号：US20210131641A1
公开(公告)日：2021-05-06
申请号：US16487118
申请日：2018-02-15
Applicant: Enplas Corporation
Inventor： Kyouhei YAMADA
Abstract: A light flux control member comprises a surface of incidence, which is the inner surface of a concave portion disposed on the back side, having an inner side surface and an inner ceiling surface; two reflective surfaces disposed on the front side, whereby a portion of the light incident on at least the inner ceiling surface is reflected in two directions, which are approximately perpendicular to the optical axis of the light-emitting element; and two light emission surfaces, disposed with the two reflective surfaces therebetween, wherefrom the light reflected by the two reflective surfaces and the light incident on the inner side surface are respectively emitted to the exterior. Each of the two light emission surfaces has, disposed in a region reached directly by light incident on either of the inner side surfaces, a first sloped surface that approaches the optical axis as the X-axis is approached.
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公开(公告)号：US20200319511A1
公开(公告)日：2020-10-08
申请号：US16765489
申请日：2018-10-26
Applicant: Enplas Corporation
Inventor： Takahiro IZAWA , Kyouhei YAMADA
IPC: G02F1/13357
Abstract: The luminous intensity of light which is emitted from the light-emitting device and of which the angle with respect to the optical axis has the absolute value of from 0 to 60° is not more than 1.5% with respect to the maximum luminous intensity of light emitted from the light-emitting device. An angular range in which light of a luminous intensity of not less than 70% of the maximum luminous intensity is emitted, the absolute value of the maximum angle with respect to the optical axis is θ, an output surface is disposed so as to intersect a straight line of which the major angle, among the angles formed by the optical axis and a straight line passing a bottom surface-side end portion of the inclined surface and intersecting the optical axis, is not less than θ.
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公开(公告)号：US20200225536A1
公开(公告)日：2020-07-16
申请号：US16650386
申请日：2017-12-05
Applicant: Enplas Corporation
Inventor： Ryo NONAKA , Kyouhei YAMADA
IPC: G02F1/13357
Abstract: A planar light source device has: a housing, a substrate, a plurality of light-emitting devices each having a light-emitting element and a light-beam control member; and a light diffusing member. The housing has: a bottom surface and two inclined surfaces. In the light distribution characteristics of a light-emitting device, a light ray with the largest angle relative to the optical axis in an angular range within which a luminous intensity equal to or more than 70% of the maximum luminous intensity is exhibited reaches the inclined surfaces. A first angle between the optical axis of the light-emitting element and a light ray having the maximum luminous intensity emitted from the light-emitting device is larger than a second angle between the optical axis of the light-emitting element and a straight line connecting the luminescence center of the light-emitting element to the opening-side end portion of the housing.
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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.
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Patent Agency Ranking
公开(公告)号：US20200050057A1
公开(公告)日：2020-02-13
申请号：US16495996
申请日：2018-03-20
Applicant: Enplas Corporation
Inventor： Kyouhei YAMADA
IPC: G02F1/1335 , G09G3/34
Abstract: A light flux control member has: a rear surface extending in the Y-axis direction; and a first incident plane, a second incident plane, and a third incident plane disposed on the rear surface side, said third incident plane reflecting light incident to the first incident plane. The light flux control member further has: a first reflecting plane disposed on the front side and reflecting, to one direction in the Y-axis direction, light incident to the first incident plane, light incident to the first incident plane and reflected on the third incident plane, and light incident to the third incident plane; and a second reflecting plane for reflecting light incident to the second incident plane to the other direction in the Y-axis direction. The light flux control member still further has two exit planes disposed sandwiching the first reflecting plane and the second reflecting plane and facing each other.
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6.发明申请公开(公告)号：US20170131458A1
公开(公告)日：2017-05-11
申请号：US15345809
申请日：2016-11-08
Applicant: Enplas Corporation
Inventor： Kyouhei YAMADA
CPC classification number: G02B6/0053 , G02B6/0045 , G02B6/0051 , G02B6/0068 , G02F1/133603 , G02F1/133606 , G02F1/133611 , G02F2001/133607 , G09F9/33 , G09F9/35
Abstract: A light flux controlling member includes: an incidence surface; a first total reflection surface, and two light guiding parts; two second total reflection surfaces disposed at respective end portions of the two light guiding parts and formed such that a distance between the second total reflection surface and a virtual plane increases as the second total reflection surface extends from the end portions, the virtual plane including the optical axis and a first virtual line which intersects the optical axis and extends in an extending direction of the two light guiding parts, the two second total reflection surfaces being surfaces on which light which is incident on the incidence surface and directly reaches the two second total reflection surfaces is incident at an angle equal to or greater than a critical angle, the two second total reflection surfaces being configured to reflect the light; and two emission surfaces.
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公开(公告)号：US20180149338A1
公开(公告)日：2018-05-31
申请号：US15572244
申请日：2016-04-21
Applicant: Enplas Corporation
Inventor： Kyouhei YAMADA
CPC classification number: F21V13/04 , F21S2/005 , F21V3/02 , F21Y2105/16 , F21Y2113/13 , F21Y2115/10 , G02B6/0011 , G02B6/0081 , G02B19/00 , G02F1/133603 , G02F1/133606
Abstract: This surface light source is provided with a light diffusing plate and a plurality of light emitting devices. The plurality of light emitting devices each include a plurality of light emitting elements that are aligned in the second direction and have mutually different colors of emitted light, and a luminous flux control member that controls the distribution of the light emitted from the plurality of light emitting elements. The luminous flux control member includes an incident surface, total reflection surfaces, and two light guiding sections. The arrangement order of the plurality of light emitting elements in a given light emitting device differs from the arrangement order of the plurality of light emitting elements in another light emitting device adjacent thereto in the first direction or the second direction.
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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
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.
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公开(公告)号：US20170254512A1
公开(公告)日：2017-09-07
申请号：US15509295
申请日：2015-06-24
Applicant: Enplas Corporation
Inventor： Kyouhei YAMADA
CPC classification number: F21V13/04 , F21S2/00 , F21V3/02 , F21V5/00 , F21V5/02 , F21V5/04 , F21V7/00 , F21V7/0091 , F21Y2103/10 , F21Y2115/10
Abstract: This light flux control member comprises: two entry surfaces disposed on two sides of a virtual plane serving as a boundary and containing the optical axis of the light-emitting element; a first protruding strip disposed between the two entry surfaces and along the virtual plane, into which light that has exited the light-emitting element enters; two total reflection surfaces, each formed at a position facing the light-emitting element with one of the entry surfaces sandwiched therebetween; two light-guide portions disposed at opposite positions with the first protruding strip sandwiched therebetween; and an exit surface formed on the external surface of each of the light-guide portions. A second light flux control member is disposed so as to cover the first protruding strip and includes a diffuse transmission portion whereby light that has entered and exited the first protruding strip is transmitted while being diffused.
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