The present disclosure provides a light emitting device and a method for manufacturing the same, and a display device, and relates to the field of display technology. The light emitting device includes: a light emitting unit; an encapsulating layer located on one side of the light emitting unit, wherein the encapsulating layer includes a reflective layer; an adhesive layer located on one side of the encapsulating layer away from the light emitting unit, wherein the adhesive layer includes an adhesive material; and a color filter layer located on one side of the adhesive layer away from the encapsulating layer, wherein the reflective layer is configured to reflect a light that cures the adhesive material.