US 12,242,177 B2
Projector with increased light emission
Junichi Wakabayashi, Ueda (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Sep. 6, 2022, as Appl. No. 17/903,198.
Claims priority of application No. 2021-144557 (JP), filed on Sep. 6, 2021.
Prior Publication US 2023/0074488 A1, Mar. 9, 2023
Int. Cl. G03B 21/20 (2006.01); G02B 27/10 (2006.01); G02B 27/12 (2006.01); G02B 5/30 (2006.01); G02B 27/28 (2006.01)
CPC G03B 21/2006 (2013.01) [G02B 27/1026 (2013.01); G02B 27/1046 (2013.01); G02B 27/126 (2013.01); G02B 5/3058 (2013.01); G02B 27/286 (2013.01); G03B 21/2073 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A projector comprising:
a light source apparatus;
a color separation system that separates first light outputted from the light source apparatus into a plurality of color beams;
a plurality of light modulators that modulate the plurality of separated color beams from the color separation system;
reduction optical systems that reduce at least one of pencils of light formed of the plurality of color beams modulated by the plurality of light modulators
a light combining prism that combines the plurality of reduced color beams with one another; and
a projection optical apparatus that projects second light that is the combined light from the light combining prism,
wherein the reduction optical systems are disposed between the light modulators and the light combining prism,
an area of an effective display region of each of the light modulators is greater than an effective area of each light incident surface of the light combining prism, wherein the area of the effective display region is an area of a functional film provided at the light combining prism, and
wherein the projector is a reflective projector including wire-grid polarizers disposed between the light modulators and the reduction optical systems.