Patent ID: 11921411
Assignee: CORETRONIC CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A projection device, comprising an illumination system, a light valve and a projection lens, wherein the illumination system is configured to provide an illumination beam, the light valve is disposed on a transmission path of the illumination beam and is configured to convert the illumination beam into an image beam, the projection lens is disposed on a transmission path of the image beam and is configured to project the image beam, wherein the illumination system comprises an excitation light source and a wavelength conversion element, wherein:
the excitation light source is configured to provide an excitation beam; and
the wavelength conversion element is disposed on a transmission path of the excitation beam, the wavelength conversion element comprises a substrate, a wavelength conversion layer and a heat dissipation member, wherein the substrate has a supporting surface, the wavelength conversion layer is disposed on the supporting surface, the wavelength conversion layer is used to convert the excitation beam into a converted beam, the illumination beam comprises the converted beam, the heat dissipation member is disposed on the supporting surface, the heat dissipation member has a heat dissipation plate and a plurality of heat dissipation tooth portions, the heat dissipation plate is fixed on the supporting surface, the heat dissipation plate has an outer side surface, the outer side surface is perpendicular to the supporting surface, and the heat dissipation tooth portions are respectively connected to the outer side surface, wherein the heat dissipation plate and at least part of the plurality of heat dissipation tooth portions are surrounded in a radial direction by the wavelength conversion layer.