Patent ID: 11960113
Assignee: HKC CORPORATION LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 11:
12. A backlight module, comprising a back plate, a light plate, and a plurality of lamp beads; wherein the light plate is arranged opposite to the back plate, and the plurality of lamp beads are arranged on a side of the light plate facing away from the back plate; wherein the back plate comprises a back plate body, at least one sunken groove, and a thermally conductive adhesive; the back plate body is disposed opposite to and spaced apart from the light plate; the at least one sunken groove is disposed in a side of the back plate body opposite to the light plate; the thermally conductive adhesive is disposed in the at least one sunken groove; and an air channel is arranged between the thermally conductive adhesive and the light plate;
wherein the back plate further comprises at least one trough connected with the at least one sunken groove, and two ends of each of the at least one trough respectively define an air inlet and an air outlet;
wherein the at least one trough is defined in the back plate body; the air inlet and the air outlet are each a hole-like structure running through the back plate body, and do not overlap the thermally conductive adhesive; wherein a side of the thermally conductive adhesive facing the light plate forms a sawtooth structure, which comprises a plurality of teeth arranged at intervals; wherein ends of each of the plurality of teeth of the thermally conductive adhesive are in contact with the light plate, and the air channel is formed between every two adjacent teeth and the light plate; and
wherein a distance from the air outlet to a ground is greater than a distance from the air inlet to the ground; wherein a width of a sunken groove comparatively nearer to the air outlet is greater than a width of another sunken groove comparatively nearer to the air inlet; and in the thermally conductive adhesive, a cross-sectional area of an air channel between two adjacent teeth comparatively nearer to the air outlet is smaller than a cross-sectional area of another air channel between two adjacent teeth comparatively nearer to the air inlet.