Backlight module and method for manufacturing the same, and display device

A backlight module, comprising:

• a light-transmitting substrate;
• a plurality of light sources located on a side of the light-transmitting substrate, wherein the plurality of light sources respectively comprise a light-emitting surface and an electrode, wherein the electrode is located on a side of the light-emitting surface away from the light-transmitting substrate;
• a first film layer located on a same side of the light-transmitting substrate as the plurality of light sources, wherein a distance between a surface of the first film layer away from the light-transmitting substrate and the light-transmitting substrate is greater than a distance between a surface of the electrode away from the light-transmitting substrate and the light-transmitting substrate, wherein the first film layer comprises a first recess on a side away from the light-transmitting substrate, and wherein at least part of the electrode is exposed by the first recess;
• and
• a first metal layer disposed on a side of the first film layer away from the light-transmitting substrate, wherein the first metal layer comprises a connection electrode, and wherein the connection electrode is electrically connected to the electrode in the first recess.