LED flat light source structure

The invention discloses an LED flat light source structure, which comprises an aluminum substrate; the aluminum substrate is adhered with a reflective membrane and is provided with a plurality of luminous bodies; the front of the plurality of the luminous bodies is provided with a light guide plate for diffusing light; the front of the light guide plate is provided with a diffuse transmission plate; and the wall of the light guide plate close to the luminous bodies is provided with freedom surfaces which correspond to the luminous bodies and are used for refracting the light. Illuminators with the two-dimensional and rotationally symmetrical freedom surfaces refract the light so as to increase the radiation area of LED point sources and reduce the glare effect; the LED luminous bodies and the illuminator are arranged one-to-one, so that the flat luminous source structure is changeable according to the actual requirement, is convenient to extend, and can be used in a plurality of occasions.