LED device and backlight module

A LED device, comprising a bracket, a LED chip and an encapsulation layer;

• wherein a reflective cup is arranged on the bracket, and the LED chip is arranged in the reflective cup of the bracket;
• wherein the encapsulation layer encases the LED chip and encapsulates the LED chip in the reflective cup, the encapsulation layer has a top surface of the encapsulation layer, the top surface of the encapsulation layer is located above a top surface of the reflective cup, and the top surface of the encapsulation layer is a lens curved surface;
• wherein in an on-state of the LED chip, the LED device has a plurality of virtual cross sections passing through a geometrical center of the LED chip and perpendicular to a top surface of the bracket, wherein in at least one of the plurality of virtual cross sections of the LED device, the LED device has luminous efficiency greater than or equal to 95% within a beam angle of at least 60°;
• wherein the encapsulation layer comprises a first encapsulation layer in the reflective cup and a second encapsulation layer arranged on the first encapsulation layer, a notch is arranged on periphery of the second encapsulation layer, and a top surface of the second encapsulation layer is a lens curved surface;
• and
• wherein a bracket step is formed on the bracket and is at a corner of the bracket, and the notch of the second encapsulation layer is formed at a position of the bracket step.