US 10,520,163 B2Granted

Light bundle control member, light emitting device, and illuminating device

AssigneeEnplas Corporation

InventorsHiroyuki Shinohara, Akinobu Seki

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Abstract

A light bundle control member of the present invention comprises: an entry plane on which light emitted from a light emitting element becomes incident; two reflecting planes which are arranged across the entry plane in positions opposing the light emitting element, and which respectively reflect some of the light entering via the entry plane in two directions that are substantially perpendicular to the optical axis of the light emitting element and opposed to each other; and two output planes which are arranged opposing each other across the two reflecting planes, and which respectively cause the light reflected by the two reflecting planes to be externally output. Each of the two output planes has a plurality of first ridges arranged thereon, wherein, as viewed from the output plane side, a ridge line of the plurality of first ridges is substantially parallel with the optical axis of the light emitting element.

Claims8

Dependent claims

A light flux controlling member configured to control a distribution of light emitted from a light-emitting element, the light flux controlling member comprising:

an incidence surface configured to receive the light emitted from the light-emitting element;
two reflection surfaces disposed opposite to the light-emitting element with the incidence surface interposed between the light-emitting element and the two reflection surfaces, the two reflection surfaces being configured to reflect a part of light that is entered from the incidence surface such that the part of light travels in two opposite directions substantially perpendicular to a light axis of the light-emitting element;
and
two emission surfaces disposed opposite to each other with the two reflection surfaces interposed between the two emission surfaces, the two emission surfaces being configured to emit, to outside, light reflected by the two reflection surfaces,
wherein a plurality of first ridges are disposed in each of the two emission surfaces, and
wherein ridgelines of the plurality of first ridges are substantially parallel with the light axis of the light-emitting element as viewed from an emission surface side.

3 more elements

Dependencies are inferred from the claim text.