US 11,966,153 B2
Wavelength conversion module and projection apparatus
Ming-Feng Hou, Hsin-Chu (TW); Shi-Wen Lin, Hsin-Chu (TW); and Shih-Hang Lin, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Apr. 14, 2022, as Appl. No. 17/720,319.
Claims priority of application No. 202120854392.3 (CN), filed on Apr. 25, 2021.
Prior Publication US 2022/0342290 A1, Oct. 27, 2022
Int. Cl. G03B 21/20 (2006.01); G02B 26/00 (2006.01); G03B 21/16 (2006.01)
CPC G03B 21/204 (2013.01) [G02B 26/008 (2013.01); G03B 21/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wavelength conversion module disposed on a transmission path of an excitation beam, the wavelength conversion module comprising a driving element, a wavelength conversion wheel, and at least one flow guide, wherein:
the wavelength conversion wheel comprises a rotary disc and at least one wavelength conversion layer disposed on the rotary disc;
the driving element is connected to the rotary disc of the wavelength conversion wheel to drive the wavelength conversion wheel to rotate along an axis of the driving element as a central axis; and
the at least one flow guide is disposed beside the wavelength conversion wheel at intervals along the axis and at least one airflow channel is formed between the at least one flow guide and the wavelength conversion wheel, wherein the at least one flow guide and the driving element are disposed at intervals, the at least one flow guide is not in contact with the rotary disc and the driving element, an orthographic projection of the at least one flow guide on the rotary disc overlaps at least part of the at least one wavelength conversion layer, and when the wavelength conversion wheel rotates, a relative velocity between the wavelength conversion wheel and the at least one flow guide occurs.