Patent ID: 11937025
Assignee: CHENGDU XGIMI TECHNOLOGY CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC F  G  H

Claim 4:
5. A light source module comprising a first light source, a light combining system, and a phosphor wheel;
wherein the phosphor wheel comprises a base, a first phosphor layer, and a second phosphor layer, the base comprises an excitation light reflecting section and an excitation light transmitting section, the first phosphor layer is disposed on a surface of the excitation light reflecting section facing a direction of incident light and spreads along a circumferential direction of the base, the second phosphor layer is disposed on a surface of the excitation light transmitting section facing away from the direction of incident light and spreads along the circumferential direction of the base, and the first phosphor layer and the second phosphor layer are offset to each other in a radial direction of the base;
a part of excitation light emitted by the first light source irradiates the first phosphor layer and excites first excited phosphor light, and a part of the excitation light emitted by the first light source passes through the excitation light transmitting section, irradiates the second phosphor layer and excites second excited phosphor light; and
the light combining system is configured to combine the first excited phosphor light and the second excited phosphor light,
wherein the base comprises a reflecting layer and a transmitting layer, wherein,
the reflecting layer and the transmitting layer are stacked, a portion of the transmitting layer covered by the reflecting layer is the excitation light reflecting section or the reflecting layer is the excitation light reflecting section, and a portion of the transmitting layer not covered by the reflecting layer is the excitation light transmitting section; or
the transmitting layer is ring-shaped, the transmitting layer is sleeved on an outer periphery of the reflecting layer, the reflecting layer is the excitation light reflecting section, and the transmitting layer is the excitation light transmitting section,

a filter layer is disposed on the transmitting layer, the filter layer is configured to transmit excitation light and reflect phosphor light excited from the second phosphor layer,
a projection area of the second phosphor layer in an axial direction of the phosphor wheel is contained in the filter layer.