US 12,282,248 B2
Fluorescent light-emitting module, projector, and phosphor wheel
Yosuke Honda, Nara (JP); and Yoshiyuki Takahira, Kyoto (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/566,840
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed May 26, 2022, PCT No. PCT/JP2022/021514
§ 371(c)(1), (2) Date Dec. 4, 2023,
PCT Pub. No. WO2023/276502, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2021-107487 (JP), filed on Jun. 29, 2021.
Prior Publication US 2024/0272534 A1, Aug. 15, 2024
Int. Cl. G03B 21/20 (2006.01); G02B 26/00 (2006.01)
CPC G03B 21/204 (2013.01) [G02B 26/008 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fluorescent light-emitting module comprising:
a light source;
a first rotating wheel including: a first phosphor that is configured to emit a first fluorescence when excited by excitation light emitted by the light source and a second phosphor that is configured to emit a second fluorescence when excited by a part of the first fluorescence;
a second rotating wheel including a color filter that is configured to trim the first fluorescence to desired color light by cutting a part of the first fluorescence; and
wherein
the second phosphor is stacked on the first phosphor, and
in a plan view of the first rotating wheel, a size of a portion of the first phosphor on which the second phosphor is not stacked is larger than a size of a portion of the first phosphor on which the second phosphor is stacked.