Surface light source, manufacturing method thereof and liquid crystal display device

A manufacturing method of a surface light source, comprising:

• forming a driving circuit on a substrate;
• disposing a plurality of light emitting diode dies on a side of the substrate on which the driving circuit is formed, wherein the plurality of light emitting diode dies are electrically connected to the driving circuit, the driving circuit is configured to control at least two of the plurality of light emitting diode dies to emit light independently of each other, and each light emitting diode die is an unpackaged die;
• and
• forming an encapsulation layer on a side of the plurality of light emitting diode dies away from the substrate, wherein the encapsulation layer is a continuous film layer covering the plurality of light emitting diode dies, wherein
• in a direction of at least one of the row direction and the column direction, a distance between adjacent ones of the plurality of light emitting diode dies is in a range of 30 μm to 500 μm, and
• in a direction perpendicular to the substrate, a thickness of the encapsulation layer on the side of the plurality of light emitting diode dies away from the substrate is less than 30 μm,
• wherein the plurality of light emitting diode dies comprise a plurality of die groups arranged in the row direction and the column direction, the surface light source further comprises a plurality of integrated circuit controllers connected with the driving circuit, each integrated circuit controller is electrically connected to one die group, and the integrated circuit controller electrically connected to each die group is configured to control each light emitting diode die in the each die group to emit light independently,
• wherein the encapsulation layer covers the driving circuit but does not cover the integrated circuit controllers.