Planar light-emitting unit

Patent metadata

Field	Value
Publication number	US-9869808-B2
Application number	US-201515305264-A
Country	US
Kind code	B2
Filing date	Mar 17, 2015
Priority date	Apr 21, 2014
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A planar light-emitting unit includes a light emission region and a non-light emission region located in an outer periphery of the light emission region. A non-space region is provided between a light guide member and a diffusion member in a region corresponding to the non-light emission region such that a space is formed in a region corresponding to the light emission region between the light guide member and the diffusion member. The non-space region includes a protruding region extending to the light emission region from the non-light emission region, and a conditional expression 0<Δ≦2d×tan θ is fulfilled, where Δ is a protruding amount (mm) from the non-light emission region of the non-space region, d is a thickness (mm) of the light guide member, and θ is a total reflection critical angle between the light guide member and air.

First claim

The invention claimed is:

1. A planar light-emitting unit comprising:
a plurality of surface light-emitting portions obtained by arraying light-emitting surfaces so as to be aligned in a plane shape, and configured to emit light toward a visible side;
a light guide member arranged in a manner facing the light-emitting surfaces of the plurality of surface light-emitting portions adjacent to each other and configured to transmit light emitted from the surface light-emitting portio…

Assignees

• Konica Minolta Inc

Inventors

• Kimura Naoki
• Hirao Yusuke
• Sekine Koujirou

Classifications

• H01L2251/5338

  Electricity · mapped topic

• H01L25/048

  Electricity · mapped topic

• H01L51/5246

  Electricity · mapped topic

• H01L51/5012

  Electricity · mapped topic

• G02B6/0051 Primary

  Physics · mapped topic