Flat cup LED lamp bead with light condensation effect

The flat cup LED lamp bead comprises a shell-shaped support, a light-emitting chip assembly and an optical lens assembly, the shell-shaped support is provided with a cavity, the cavity is provided with a cavity opening, a cavity bottom and a cavity wall, the cavity opening right faces the cavity bottom, the two edges of the cavity wall extend to the cavity opening and the cavity bottom respectively, the light-emitting chip assembly is installed on the cavity bottom, and the optical lens assembly is installed on the shell-shaped support. The optical lens assembly comprises a concave lens and a convex lens which sequentially receive light emitted by the light-emitting chip assembly, the light-emitting face of the concave lens is an inwards-concave curved face, the light-incident face of the convex lens is an outwards-convex curved face, the inwards-concave curved face is attached to the outwards-convex curved face, the light-emitting face of the convex lens is a plane, and the refractive index of the concave le