LIGHT SOURCE MODULE AND ILLUMINATING DEVICE HAVING THE SAME

Title:

LIGHT SOURCE MODULE AND ILLUMINATING DEVICE HAVING THE SAME

Document Type and Number:

Japanese Patent JP2010067442

Kind Code:

A

Abstract:

To provide a light source module and a display device which improves light extraction efficiency and uniforms illuminance distribution as well.

According to the light source module, in consideration of reflection light from a reflective plate 5 disposed on a second end face 1B of a light guide member 1, the density of a diffusion structure 4 is increased from the position of a first end face 1A on which light from a light source 2 is incident to a position of a half or more of the dimension L in the light guide direction X of the light guide member 1, and is kept constant in an area beyond the position of the half or more of the dimension L. As a result, light extraction efficiency is determined to be practically needed efficiency 80% or higher, and illuminance distribution is made uniform in the light guide direction X.

Inventors:

NAGURA HIDEAKI
NISHIOKA SUMUTO

Application Number:

JP2008232185A

Publication Date:

March 25, 2010

Filing Date:

September 10, 2008

Export Citation:

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Assignee:

SHARP KK

International Classes:

F21S2/00; F21Y101/02

Domestic Patent References:

JPH09163080A	1997-06-20
JPH04268506A	1992-09-24
JPH0465007A	1992-03-02
JPH09329713A	1997-12-22
JP2002133907A	2002-05-10

Foreign References:

WO2007099838A1

2007-09-07

Attorney, Agent or Firm:

Hiroshi Yamazaki
Mitsuo Tanaka
Yukinori Nakakura

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