Wavelength conversion assembly, projection apparatus and manufacturing method of wavelength conversion assembly

A projection apparatus, comprising a light source, a wavelength conversion assembly, a light valve, and a projection lens, wherein:

• the light source is configured to emit an illumination light beam,
• the wavelength conversion assembly is disposed in an optical path of the illumination light beam and is configured to convert the illumination light beam into a converted light beam, the wavelength conversion assembly comprises a substrate, a first element, a first welding structure, and a wavelength conversion layer, wherein:
• the first element is disposed on a first portion of the substrate,
• the first welding structure is located between the first portion of the substrate and the first element and partially connects the first portion and the first element as a whole, and
• the wavelength conversion layer is disposed on a second portion of the substrate, the second portion of the substrate surrounds the first portion of the substrate,
• the light valve is disposed in an optical path of the converted light beam and is configured to adjust the converted light beam into a projection light beam, and
• the projection lens is disposed in an optical path of the projection light beam to project the projection light beam.

A manufacturing method of a wavelength conversion assembly, comprising:

• arranging a first element on a first portion of a substrate;
• forming a first welding structure between the first portion of the substrate and the first element, wherein the first welding structure partially connects the first portion and the first element as a whole;
• and
• arranging a wavelength conversion layer on a second portion of the substrate, wherein the second portion of the substrate surrounds the first portion of the substrate.