a first baseline segment, extending in a baseline direction, the first baseline segment comprising a first baseline head extending in an electrode connection direction, the first baseline head having a first length in the electrode connection direction and a fifth length in the baseline direction, the first length being substantially greater than the fifth length, the baseline direction and the electrode connection direction forming a tolerance included angle, the first baseline head of the first baseline segment forming a branch structure;

a second baseline segment, comprising a second baseline head extending in the electrode connection direction;

a first pad, comprising a first rear end and a first front end connecting with each other, the first rear end extending in the baseline direction and being connected to the first baseline head;

a second pad, comprising a second rear end and a second front end connecting with each other, the second rear end extending in the baseline direction and being connected to the second baseline head;

a film sheet, the first baseline segment, the second baseline segment, the first pad, and the second pad being disposed on the film sheet; and

an illuminant, having a pair of electrodes, the pair of electrodes defining the electrode connection direction, the pair of electrodes being electrically connected to the first front end and the second front end respectively, the first front end and the second front end except for the branch structure being located in an orthographic projection of the illuminant or around the orthographic projection.