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Patent Searching and Data


Title:
LIGHT EMITTING DEVICE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049871
Kind Code:
A1
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.

Inventors:
MOCHIDA, Toshihiko
OKUYAMA, Hiroaki
Application Number:
JP2018/032803
Publication Date:
March 14, 2019
Filing Date:
September 05, 2018
Export Citation:
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Assignee:
ENPLAS CORPORATION (2-30-1, Namiki Kawaguchi-sh, Saitama 34, 〒3320034, JP)
International Classes:
F21V5/00; F21V5/04; G02F1/13357; F21Y115/10
Domestic Patent References:
WO2016163357A12016-10-13
Foreign References:
JP2017129784A2017-07-27
JP2017050262A2017-03-09
JP2016110869A2016-06-20
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg. 1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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