公开(公告)号：US20210141273A1

公开(公告)日：2021-05-13

申请号：US17093766

申请日：2020-11-10

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida

IPC: G02F1/13357

Abstract: A surface light source device includes a substrate, a plurality of light emitting devices and a light diffusion plate. Each light emitting device includes a light emitting element and a light flux controlling member. A cross section, perpendicular to the central axis of the light flux controlling member, of the emission surface is line-symmetric with respect to the X-axis and the Y-axis, and the cross section has the shortest length along the X-axis and the longest length along the Y-axis. For the light flux controlling member of one of the light emitting devices that is disposed closest to a corner of the light diffusion plate in plan view, a part having a largest curvature in the emission surface on the cross section of the emission surface is located closer to the X-axis than an intersection point of a light beam with the emission surface is.

公开(公告)号：US10830413B2

公开(公告)日：2020-11-10

申请号：US16629510

申请日：2018-07-10

Applicant: ENPLAS CORPORATION

Inventor： Toshihiko Mochida

IPC: F21V5/04 ,  F21S41/25 ,  G02B3/02 ,  F21Y115/10 ,  F21Y101/00

Abstract: The present invention provides a lens for a light emitting element (a luminous flux control member) that can ensure sufficient spread of light even with a smaller number of light emitting elements. The luminous flux control member (10) of the present invention includes: a dome shaped aspherical lens body (11). The lens body (11) includes: a base surface (13); and a dome shaped curved surface (12). The base surface (13) has a base concave portion (131) centered on a central axis, a concave surface of the base concave portion (131) has a light incident region for incident light emitted from a light emitting element, the dome shaped curved surface (12) has a light emitting region for emitting incident light from the light incident region to an outside, the light emitting region of the curved surface (12) has an elliptical shape as viewed from a central axis direction centered on the central axis, in which a length (X) of an X axis orthogonal to the central axis and a length (Y) of a Y axis orthogonal to the central axis and the X axis satisfy X

公开(公告)号：US10393343B2

公开(公告)日：2019-08-27

申请号：US15757442

申请日：2016-08-30

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida

IPC: F21V3/02 ,  F21V5/04 ,  F21V13/04 ,  G02B19/00 ,  H01L33/58 ,  F21Y105/16 ,  F21Y115/10 ,  G02F1/1335

Abstract: The purpose of the present invention is to provide a light flux control member capable of suppressing brightness variation due to light refracted by an inclined surface. The light flux control member comprises: an entry surface which is an inner surface of a recess portion formed on a back side; an emission surface which is formed on a front side; and an annular groove portion which is formed on the back side and outside the entry surface. The annular groove portion includes an outside inclined surface and an inside surface. The inside surface includes a plurality of retroreflective portions.

公开(公告)号：US11249342B2

公开(公告)日：2022-02-15

申请号：US16644512

申请日：2018-09-05

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida ,  Hiroaki Okuyama

IPC: G02F1/13357 ,  F21V5/04 ,  G02B3/04

Abstract: This light emitting device includes a light emitting element and a light flux controlling member. The light flux controlling member includes an incident surface, an emission surface, a back surface, a protruding portion and a scattering portion. In a cross section including a central axis, an angle formed by two beams, which are emitted from the light emitting device and have a maximum luminous intensity, is 150° or more. In a cross section including a central axis, predetermined light is made incident at an incident angle of 60° and an average angle, which is formed by, among the light reflected by the scattering portion, a light ray having a maximum light amount and a light ray having a light amount of 50% of the maximum light amount, is 5° or more.

公开(公告)号：US20210165278A1

公开(公告)日：2021-06-03

申请号：US17106423

申请日：2020-11-30

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida

IPC: G02F1/13357

Abstract: A light flux controlling member for controlling a distribution of light emitted from a light-emitting element includes an incidence surface configured to allow the light to enter the light flux controlling member; an emission surface configured to emit light; and a reflection part including an inclined surface configured to reflect light entered from the incidence surface, wherein in a cross-section, a region where light emitted from a light emission center of the light-emitting element that is entered from the incidence surface and sequentially reflected by the emission surface and the inclined surface reaches in the emission surface includes a portion where a derivative value of a gradient of a tangent to a given point in the emission surface is 0, or a portion where a sign of the derivative value reverses.

公开(公告)号：US10900636B2

公开(公告)日：2021-01-26

申请号：US16605824

申请日：2018-04-19

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida

IPC: F21V5/04 ,  F21V8/00 ,  G06F1/16

Abstract: This light flux control member comprises an incidence surface, an emission surface, and a plurality of protruding strips. The plurality of protruding strips are disposed approximately perpendicularly to a central axis. When the section perpendicular to the central axis of the incidence surface has the shape of an ellipse, at least some of the plurality of protruding strips are disposed outside a recessed part in the minor axis direction of the ellipse and along the minor axis direction. When the section of the emission surface has the shape of an ellipse, at least some of the plurality of protruding strips are disposed outside the recessed part in the major axis direction of the ellipse and along the major axis direction.

公开(公告)号：US11243430B2

公开(公告)日：2022-02-08

申请号：US17106423

申请日：2020-11-30

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida

IPC: G02F1/1335 ,  F21V5/04 ,  G02F1/13357 ,  F21V7/00 ,  G09G3/34

Abstract: A light flux controlling member for controlling a distribution of light emitted from a light-emitting element includes an incidence surface configured to allow the light to enter the light flux controlling member; an emission surface configured to emit light; and a reflection part including an inclined surface configured to reflect light entered from the incidence surface, wherein in a cross-section, a region where light emitted from a light emission center of the light-emitting element that is entered from the incidence surface and sequentially reflected by the emission surface and the inclined surface reaches in the emission surface includes a portion where a derivative value of a gradient of a tangent to a given point in the emission surface is 0, or a portion where a sign of the derivative value reverses.

公开(公告)号：US11099429B2

公开(公告)日：2021-08-24

申请号：US17093766

申请日：2020-11-10

Applicant: Enplas Corporation

Inventor： Toshihiko Mochida

IPC: G02F1/00 ,  G02F1/13357

Abstract: A surface light source device includes a substrate, a plurality of light emitting devices and a light diffusion plate. Each light emitting device includes a light emitting element and a light flux controlling member. A cross section, perpendicular to the central axis of the light flux controlling member, of the emission surface is line-symmetric with respect to the X-axis and the Y-axis, and the cross section has the shortest length along the X-axis and the longest length along the Y-axis. For the light flux controlling member of one of the light emitting devices that is disposed closest to a corner of the light diffusion plate in plan view, a part having a largest curvature in the emission surface on the cross section of the emission surface is located closer to the X-axis than an intersection point of a light beam with the emission surface is.