公开(公告)号：EP0880723A4

公开(公告)日：1999-04-28

申请号：EP97906909

申请日：1997-02-12

Applicant: PHYSICAL OPTICS CORP

Inventor： JANNSON TOMASZ P ,  JANNSON JOANNA L ,  KUPIEC STEPHEN A ,  LATCHINIAN JACK L

IPC: F21V8/00 ,  G02B6/00 ,  G02F1/13357 ,  G02F1/1335

CPC classification number: G02B6/0038 ,  G02B6/0018 ,  G02B6/0031 ,  G02B6/0036 ,  G02B6/0053 ,  G02B6/0061 ,  G02B6/0068 ,  G02F1/133615 ,  G02F2001/133607

Abstract: Systems and methods for providing an LCD with a collimated backlight and a non-Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) and a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source, and (2) reflecting light from said illumination source to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.

Abstract translation: 描述了用于提供具有准直背光源和非朗伯散射体的LCD的系统和方法。 一种LCD系统包括：用于产生光的照明源（60） 准直波导（80），其光学连接至所述照明源，所述准直波导包括顶面（146），入射端（130）以及多个基本上平行的光学元件（140），所述光学元件用于将来自所述入射端的光重定向到， 并且穿过所述顶表面，所述多个基本上平行的光学元件中的每一个包括不平行于所述顶表面的第一小平面（142）和不平行于所述顶表面的第二小平面（144）;其中， 反射器（70），其光学连接至光源并且光学连接至准直波导，反射器（1）至少部分地围绕照明源，以及（2）通过直接反射将来自所述照明源的光反射至所述入射端; 与准直波导光学连接的液晶显示器（40） 以及与液晶显示器光学连接的非朗伯散射体（30），用于引导来自所述液晶显示器的光。 来自反射器的光直接入射到入射端。 该系统和方法的优点在于来自LCD的光线明亮且均匀。

公开(公告)号：CA2245833A1

公开(公告)日：1997-08-21

申请号：CA2245833

申请日：1997-02-12

Applicant: PHYSICAL OPTICS CORP

Inventor： KUPIEC STEPHEN A ,  LATCHINIAN JACK L ,  JANNSON JOANNA L ,  JANNSON TOMASZ P

IPC: F21V8/00 ,  G02B6/00 ,  G02F1/13357 ,  G02F1/1335

Abstract: Systems and methods for providing an LCD with a collimated backlight and a nonLambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) and a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source, and (2) reflecting light from said illumination source to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.

公开(公告)号：CA2245833C

公开(公告)日：2006-06-06

申请号：CA2245833

申请日：1997-02-12

Applicant: PHYSICAL OPTICS CORP

Inventor： JANNSON TOMASZ P ,  JANNSON JOANNA L ,  KUPIEC STEPHEN A ,  LATCHINIAN JACK L

IPC: G02F1/1335 ,  F21V8/00 ,  G02B6/00 ,  G02F1/13357

Abstract: Systems and methods for providing an LCD with a collimated backlight and a n on- Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) a nd a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source and (2) reflecting light from said illumination sour ce to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.