公开(公告)号：AU5345701A

公开(公告)日：2001-11-07

申请号：AU5345701

申请日：2001-04-12

Applicant: INFOCUS CORP

Inventor： PETERSON MARK ,  POTEKEV FRANC ,  STAHL KURT ,  ENGLE SCOTT

IPC: G02B27/09 ,  H04N9/31

Abstract: A multimedia projector (30) includes a light source (32) producing a nonuniform illumination pattern and a light integrating tunnel (110, 130) having parallelogram-shaped input and output apertures (132, 134) with an average diagonal dimension. The input and output apertures are spaced apart by a length dimension (136) that is less than five-times the average diagonal dimension of the apertures. A light pattern (150) propagating from the output aperture is substantially more uniform than a light pattern (146) propagating from a rectangular tunnel of the same length. Alternatively, a light pattern (164) propagating from the output aperture has substantially the same uniformity as the light pattern (146) propagating from a substantially longer rectangular tunnel.

公开(公告)号：WO0172048A3

公开(公告)日：2002-02-14

申请号：PCT/US0109039

申请日：2001-03-21

Applicant: INFOCUS CORP ,  STAHL KURT ,  GOHMAN JEFFREY A

Inventor： STAHL KURT ,  GOHMAN JEFFREY A

IPC: H04N9/31

CPC classification number: H04N9/3105 ,  G03B21/005 ,  G03B21/2073 ,  H04N9/3167

Abstract: In an image projector (8, 68), a light source (14) illuminates a plate-type polarizing beam splitter (40) that transmits P-polarized light rays and reflects S-polarized light rays (34). The P-polarized range light rays transmit through a green filter (841) and impinge on a first reflective LCD light valve (261). The S-polarized light rays strike a dichroic filter (48), which divides them into red and blue light rays (44, 46) that impinge on respective second and third LCD light valves (262, 263). Green light rays impinging on illuminated state pixels on the first LCD light valve are reflected with a 90 DEG polarization change and are reflected by the polarizing beam splitter toward the projection lens. Red and blue light rays impinging on illuminated state pixels on the second and third LCD light valves are reflected with a 90 DEG polarization change and transmit through the polarizing beam splitter toward the projection lens.

Abstract translation: 在图像投影仪（8,68）中，光源（14）照射透射P偏振光并且反射S偏振光（34）的板式偏振光束分离器（40）。 P偏振范围光线透过绿色滤光片（841）并撞击在第一反射型LCD光阀（261）上。 S偏振光射入二向色滤光器（48），它将它们分成撞击在相应的第二和第三LCD光阀（262,263）上的红色和蓝色光线（44,46）。 撞击第一LCD光阀上的照明状态像素的绿色光线以90°偏振变化反射，并被偏振分束器反射向投影透镜。 撞击第二和第三LCD光阀上的照明状态像素的红色和蓝色光线以90度偏振变化反射并透射通过偏振分束器朝向投影透镜。

公开(公告)号：AU5091001A

公开(公告)日：2001-10-03

申请号：AU5091001

申请日：2001-03-21

Applicant: INFOCUS CORP

Inventor： STAHL KURT ,  GOHMAN JEFFREY A

IPC: H04N9/31