LIGHT FLUX CONTROLLING MEMBER, LIGHT EMITTING DEVICE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY APPARATUS
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United States of America Patent
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Issued Date -
Nov 12, 2015
app pub date -
May 5, 2015
filing date -
May 7, 2014
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Abstract
A light flux controlling member includes: a rear surface; an incidence surface configured such that light emitted from a light emitting element is incident on the incidence surface, the incidence surface being the inner surface of a recess opened at the rear surface; a reflection surface configured to laterally reflect part of the light incident on the incidence surface; and an emission surface configured to emit the light reflected by the reflection surface, the emission surface being disposed to surround the central axis. The incidence surface includes a top surface and a side surface. The side surface includes a plurality of linear protrusions each including a ridge line extending from the outer rim part of the top surface to the opening edge of the recess.
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