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Title:
LIGHT FLUX CONTROLLING MEMBER, LIGHT-EMITTING DEVICE, SURFACE LIGHT SOURCE APPARATUS, AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/054377
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a light flux controlling member capable of preventing a light diffusion plate and an optical surface of the light flux controlling member from coming into contact with each other even when the light diffusion plate has warped. This light flux controlling member comprises: a first optical surface that is disposed on the back side of the light flux controlling member in order to make light emitted from the light-emitting element incident on the inside of the light flux controlling member; a second optical surface that is disposed on the front side of the light flux controlling member in order to transmit or reflect the light incident from the first optical surface; a support projection that is disposed on the front side of the light flux controlling member in order to support the light diffusion plate; and a plurality of leg portions that are disposed on the back side of the light flux controlling member. In the direction of the central axis of the light flux controlling member, the maximum height of the support projection is higher than the maximum height of the second optical surface, and when seen in plan view, the leg portion closest to the support projection among the plurality of leg portions is disposed on a line passing the support projection and the central axis.

Inventors:
NOGAMI MASAKI
Application Number:
PCT/JP2020/035147
Publication Date:
March 25, 2021
Filing Date:
September 16, 2020
Export Citation:
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Assignee:
ENPLAS CORP (JP)
International Classes:
G02B3/02; F21S2/00; F21V5/00; G02B5/02; H01L33/58; F21Y115/10
Domestic Patent References:
WO2011010488A12011-01-27
Foreign References:
JP2015176862A2015-10-05
JP2017183077A2017-10-05
US20150300594A12015-10-22
Attorney, Agent or Firm:
WASHIDA & ASSOCIATES (JP)
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