Abstract: A light source assembly includes a first annular reflector, a second annular reflector and a plurality of first light source modules. The first annular reflector has a first reflective surface. The second annular reflector is coaxial with the first annular reflector. A radius of the first annular reflector is greater than that of the second annular reflector. The second annular reflector has a second reflective surface facing the first reflective surface. The first light source modules take a central axis of the first annular reflector as a center and annularly arranged around the center. The first light source modules provide first beams to the first reflective surface, which reflects the first beams to the second reflective surface. The second reflective surface reflects the first beams and makes the first beams emit along a direction parallel to a central axis of the second annular reflector. A projection device is also provided.

Abstract: The application discloses a die bonding method of an LED chip and a display device. The method may include: a welding material is fixed on a metal pad of the LED chip, the LED chip fixed with the welding material is transferred onto a transient substrate, the metal pad of the LED chip on the transient substrate is aligned with a bonding pad on a receiving substrate, the welding material fixed on the LED chip is heated, and then the LED chip is fixed on the receiving substrate.

Abstract: A micro-LED and a method for manufacturing the same, and a micro-LED module are provided. The method includes the following. Multiple micro-LED units that are spaced on a substrate are provided. A jig is covered on the substrate in such a manner that a light-emitting part of each micro-LED unit is covered between the jig and the substrate. A molten light blocking material is injected into the jig in such a manner that the light blocking material is filled between side surfaces of each micro-LED unit and the jig. The light blocking material is cured to form a light blocking layer on the side surfaces of each micro-LED unit. The jig is removed after the light blocking material is cured.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An optical imaging lens set includes a first lens element with a concave image-side surface in a vicinity of its periphery, a second lens element with a convex object-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of its periphery, a third lens element with positive refractive power, a concave object-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of the optical axis and a fourth lens element with a concave image-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of its periphery.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises an aperture stop and six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an linage side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a shore system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An optical imaging lens set includes a first lens with positive refractive power and a convex object-side surface, a second lens element with negative refractive power and an image-side surface with a concave portion in a vicinity of its periphery, a third lens element has an object-side surface with a concave portion in a vicinity of its periphery, a fourth lens element with positive refractive power, a concave object-side surface and a convex image-side surface, a fifth lens element with an object-side with a convex portion in a vicinity of the optical axis, an image-side surface with a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of its periphery.

Abstract: An imaging lens includes first to fifth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An imaging lens includes first to fourth lens elements arranged from an object side to an image side in the given order. Through designs of surfaces of the lens elements and relevant lens parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An optical imaging lens set includes a first lens element with a concave image-side surface in a vicinity of its periphery, a second lens element with a convex object-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of its periphery, a third lens element with positive refractive power, a concave object-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of the optical axis and a fourth lens element with a concave image-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of its periphery.

Abstract: An optical imaging lens set includes a first lens with positive refractive power, a convex object-side surface and a convex image-side surface in a vicinity of its periphery, a second lens element with negative refractive power and a concave object-side surface in a vicinity of its periphery, a third lens element with positive refractive power, a concave object-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of the optical axis, a fourth lens element with a convex object-side surface in a vicinity of the optical axis, a concave image-side surface in a vicinity of the optical axis and a convex image-side surface in a vicinity of its periphery. G12 is an air gap between the first and the second lens, and G23 is an air gap between the second and the third lens to satisfy 0.5?G12/G23?3.0.