公开(公告)号：USD778334S1

公开(公告)日：2017-02-07

申请号：US29522371

申请日：2015-03-30

Applicant: ENPLAS CORPORATION

Designer： Hiroshi Takatori ,  Yasuyuki Fukuda ,  Ryo Nonaka

公开(公告)号：US11022842B2

公开(公告)日：2021-06-01

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.

公开(公告)号：US10408417B2

公开(公告)日：2019-09-10

申请号：US15533752

申请日：2015-10-29

Applicant: Enplas Corporation

Inventor： Yasuyuki Fukuda ,  Ryo Nonaka

IPC: F21V5/04 ,  F21S2/00 ,  F21V5/00 ,  H01L33/58 ,  G02B5/02 ,  G02B19/00 ,  F21Y115/10

Abstract: A light-emitting element includes a rectangular light emitting element with four edge surfaces; and a light flux control member defining a central axis and having a back surface, light entry surface formed as a recess in the back surface, a light emission surface disposed opposite the back surface, and a plurality of protruding elements forming a grid on the back surface. The grid of protruding elements include a plurality of linear ridges/valleys such that the angles formed by such linear ridges/valley and a plane including at least one of the edge surfaces of the light emitting element is an acute angle; or the grid of protruding element include a plurality of annular ridges/valley centered about the central axis, and a plurality of linear ridges/valleys disposed radially around the central axis.