JPH11329030A5 - - Google Patents
Info
- Publication number
- JPH11329030A5 JPH11329030A5 JP1998139885A JP13988598A JPH11329030A5 JP H11329030 A5 JPH11329030 A5 JP H11329030A5 JP 1998139885 A JP1998139885 A JP 1998139885A JP 13988598 A JP13988598 A JP 13988598A JP H11329030 A5 JPH11329030 A5 JP H11329030A5
- Authority
- JP
- Japan
- Prior art keywords
- plane
- transparent substrate
- prism
- bisector
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Description
【０００９】
【課題を解決するための手段】
すなわち、本発明のプリズムシートは、透明基材の少なくとも一方の面に略同一の頂角を有するプリズム列が多数並列に形成されたプリズムシートにおいて、頂角の二等分線と透明基材の平面とのなす角が異なる断面形状を有する少なくとも３種のプリズム列から構成され、これらのうち少なくとも２種のプリズム列が頂角の二等分線と透明基材の平面とのなす角が透明基材の平面の法線に対して略対称である断面形状を有していることを特徴とするものである。また、本発明の面光源素子は、透明板状体の少なくとも一つの側端面を光入射面とし、これと略直交する光出射面とを有する導光体と、前記光入射面に対向して配置された光源と、前記光出射面上に配置された上記のようなプリズムシートとからなることを特徴とするものである。[0009]
[Means for solving the problem]
The prism sheet of the present invention is characterized in that it comprises a transparent substrate having a large number of parallel prism rows formed on at least one surface thereof , the prism rows having substantially the same apex angle, and at least three types of prism rows having cross-sectional shapes with different angles between the bisector of the apex angle and the plane of the transparent substrate, and at least two types of prism rows have cross-sectional shapes in which the angle between the bisector of the apex angle and the plane of the transparent substrate is substantially symmetrical with respect to the normal to the plane of the transparent substrate. The surface light source element of the present invention is characterized in that it comprises a light guide having a light incident surface on at least one side end surface of a transparent plate-like body and a light exit surface substantially perpendicular to the light incident surface, a light source disposed opposite the light incident surface, and a prism sheet as described above disposed on the light exit surface.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13988598A JP3929599B2 (en) | 1998-05-21 | 1998-05-21 | Prism sheet and surface light source element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13988598A JP3929599B2 (en) | 1998-05-21 | 1998-05-21 | Prism sheet and surface light source element |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPH11329030A JPH11329030A (en) | 1999-11-30 |
| JPH11329030A5 true JPH11329030A5 (en) | 2004-09-02 |
| JP3929599B2 JP3929599B2 (en) | 2007-06-13 |
Family
ID=15255865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13988598A Expired - Fee Related JP3929599B2 (en) | 1998-05-21 | 1998-05-21 | Prism sheet and surface light source element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3929599B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60036733T2 (en) | 2000-07-24 | 2008-07-17 | Mitsubishi Rayon Co., Ltd. | SURFACE LIGHTING DEVICE |
| JP4676355B2 (en) * | 2006-02-23 | 2011-04-27 | 古河電気工業株式会社 | Luminance equalizing member and backlight unit |
| WO2008032275A1 (en) * | 2006-09-15 | 2008-03-20 | Koninklijke Philips Electronics N.V. | Flat and thin led-based luminary |
| JPWO2008123280A1 (en) * | 2007-03-30 | 2010-07-15 | 日本ゼオン株式会社 | Direct backlight unit |
| CN101681048B (en) * | 2007-06-18 | 2011-05-18 | 夏普株式会社 | Liquid crystal display device |
-
1998
- 1998-05-21 JP JP13988598A patent/JP3929599B2/en not_active Expired - Fee Related
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