Condensation film, backlight module and display panel

The invention discloses a light condensing film, a backlight module and a display panel. The light condensation film comprises a PET base film and a triangular prism arranged on the PET base film, sub-wavelength optical microstructures distributed in an array mode are arranged on the light-emitting face of the triangular prism and the light-entering face of the PET base film, the linear size of the sub-wavelength optical microstructures is within 380 nm, the sub-wavelength optical microstructures are perpendicular to the light-emitting face or the light-entering face, and the light-emitting face of the triangular prism and the light-entering face of the PET base film are perpendicular to the light-emitting face or the light-entering face. The light-out face and the light-in face are medium interfaces, the medium interfaces are contact faces of the two carriers, and the end, away from the PET base film or the triangular prism, of the sub-wavelength optical microstructure is narrower than the end, close to the