Patent ID: 8174022

Claim:
A method for forming a flat panel display, comprising: disposing a light guide plate below a display panel; disposing at least one optical film between the display panel and the light guide plate; and disposing at least one illuminating device package in proximity to the light guide plate, wherein a method for forming the illuminating device package includes: forming a light emitting diode device over a substrate; and forming a lens encapsulating the light emitting diode device, the lens comprising: two reflective surfaces disposed substantially symmetrically at either side of a central axis, the reflective surfaces being configured to reflect portions of light beams to at least one of the diffractive surfaces; and a plurality of diffractive surfaces separating the reflective surfaces, the diffractive surfaces being configured to diffract the reflected light beams into a convergent angle, each of the diffractive surfaces having a tilt angle respective to the central axis.