Title:
CONDENSING ELEMENT, AND SURFACE LIGHT SOURCE AND LIQUID CRYSTAL DISPLAY USING THE SAME
Document Type and Number:
Japanese Patent JP2003315546
Kind Code:
A
Abstract:
To provide a condensing element which especially has no dependence on an azimuth angle in a condensing function and draws out emitted light in the form of polarized light.
The condensing element is different from a condensing element based on difference in refractive indexes between two kinds of materials including air and an interfacial structure, has no pattern structure optically observed from the front surface side, and is characterized by having an angle, at which transmitted light intensity corresponds to one-quarter of the transmitted light intensity in a front face direction measured by making Lambertian diffusion light incident on the condensing element, being within (-50°)-(+50°) with respect to all azimuth angles.
Inventors:
MIYATAKE MINORU
HARA KAZUTAKA
TAKAHASHI NAOKI
HARA KAZUTAKA
TAKAHASHI NAOKI
Application Number:
JP2002122576A
Publication Date:
November 06, 2003
Filing Date:
April 24, 2002
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
G02B5/30; G02F1/1335; (IPC1-7): G02B5/30; G02F1/1335
Attorney, Agent or Firm:
Takao Suzuki (3 others)