Light-emitting device, backlight module and display device

The utility model provides a light-emitting device, a backlight module and a display device. The light-emitting device comprises a light-emitting chip; a lead frame, wherein the light-emitting chip is packaged in the lead frame; the lead frame is provided with a boss, and the boss is arranged around the light-emitting chip; the lens is arranged on the lead frame and located on the light-emitting side of the light-emitting chip, the lens is provided with a first groove, and the boss is embedded into the first groove. The embodiment of the utility model aims to solve the technical problem of low positioning precision of a lens and a lead frame in the prior art. 本申请提出一种发光器件、背光模组及显示装置，所述发光器件包括：发光芯片；引线框架，所述发光芯片封装于所述引线框架内；所述引线框架具有凸台，所述凸台围绕所述发光芯片设置；以及透镜，设置在所述引线框架上，且位于所述发光芯片的出光侧，所述透镜具有第一凹槽，所述凸台嵌入所述第一凹槽内。本申请实施例旨在解决现有技术中透镜与引线框架定位精度低的技术问题。