US 12,332,559 B2
Illumination system and projection apparatus
Chun-Wei Lin, Hsin-Chu (TW); and Kun-Chen Hsu, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Aug. 5, 2022, as Appl. No. 17/881,618.
Application 17/881,618 is a continuation in part of application No. 17/131,793, filed on Dec. 23, 2020, granted, now 11,442,351.
Claims priority of application No. 202010170060.3 (CN), filed on Mar. 12, 2020.
Prior Publication US 2022/0373874 A1, Nov. 24, 2022
Int. Cl. G03B 21/20 (2006.01); G02B 27/14 (2006.01)
CPC G03B 21/2066 (2013.01) [G02B 27/141 (2013.01); G03B 21/2013 (2013.01); G03B 21/2033 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An illumination system, comprising a first light source device, a supplementary light source device, a light guide device, a light splitting device, and a light converging element, wherein
the first light source device comprises laser sources configured to provide a first light beam, a second light beam, a third light beam, and a first compensation light beam;
the supplementary light source device comprises at least one laser source configured to provide at least one compensation light beam;
the light guide device comprises a first reflecting element comprising a first portion and a second portion, wherein the first portion is configured to reflect the first light beam and the first compensation light beam, and the second portion is configured to reflect the second light beam and the third light beam, the second portion is configured to allow the at least one compensation light beam to pass through;
the light splitting device comprises a first half reflecting element, wherein the first half reflecting element is located between the first light source device and the light guide device on a transmission path of the second light beam, the first half reflecting element is configured to reflect a part of the second light beam and allow the other part of the second light beam to pass through; and
the light converging element is configured to receive the first light beam, the second light beam, the third light beam, the first compensation light beam, and the at least one compensation light beam.