Illuminating device, liquid crystal display device, electronic device, and manufacturing method of light guide panel

Patent metadata

Field	Value
Publication number	US-8934071-B2
Application number	US-201414334167-A
Country	US
Kind code	B2
Filing date	Jul 17, 2014
Priority date	Jul 19, 2011
Publication date	Jan 13, 2015
Grant date	Jan 13, 2015

Abstract

When first grooves are formed by irradiating a lower surface facing a light outgoing surface of a light guide plate for an illuminating device with laser beams, an outer circumferential region is firstly irradiated with the laser beams to form second grooves. Then, the second grooves are inspected. Next, irradiation conditions of the laser beams are adjusted based on an inspection result of the second grooves, irradiation positions of the laser beams are linearly displaced from formation positions of the second grooves, and formation of the first grooves in the scattering reflection region is then started.

First claim

What is claimed is:

1. A lighting device comprising:
a light guide plate having a first surface as a light emitting surface, a plurality of side surfaces and a second surface opposed to the first surface of the light guide plate;
a plurality of light emitting elements each of which faces one of the plurality of side surfaces of the light guide plate;
a scattering reflection region in which a plurality of groove arrays including a plurality of first grooves linearly extends in…

Assignees

• Seiko Epson Corp

Inventors

• Momose Yoichi
• Urano Nobutaka

Classifications

• G02F1/133615

  Physics · mapped topic

• G02B6/0085

  Physics · mapped topic

• G02B6/0043

  Physics · mapped topic

• G02B6/009

  Physics · mapped topic

• G02B6/0036

  Physics · mapped topic