Backlight panels

A backlight panel, comprising:

• a substrate comprising a first light-emitting area and a second light-emitting area, wherein the first light-emitting area overlaps a center of the backlight panel, the second light-emitting area is located on a side of the first light-emitting area, a boundary of the second light-emitting area close to the first light-emitting area coincides with a boundary of the first light-emitting area to form a first coincident boundary, and a boundary of the second light-emitting area away from the first light-emitting area coincides with a boundary of the backlight panel to form a second coincident boundary;
• a plurality of first light-emitting devices arranged, in rows and in columns, in the first light-emitting area;
• and
• a plurality of second light-emitting devices arranged, in rows and in columns, in the second light-emitting area,
• wherein the first light-emitting devices and the second light-emitting devices have the same row direction and column direction;
• in the row direction, each of the second light-emitting devices has a distance from another adjacent one of the second light-emitting devices;
• and
• the distance between at least one of the second light-emitting devices closest to the second coincident boundary and another adjacent one of the second light-emitting devices in the row direction is less than a distance between any two adjacent ones of the first light-emitting devices in the row direction;
• wherein the second light-emitting area comprises two sub-areas respectively located on opposite sides of the first light-emitting area in the row direction, and the second coincident boundary comprises two sub-coincident boundaries, and each of the two sub-areas comprises a boundary away from the first light-emitting area coinciding with the boundary of the backlight panel to form a corresponding one of the two sub-coincident boundaries;
• and
• wherein each of the two sub-areas comprises a gradient subarea and a non-gradient subarea arranged along the column direction;
• in the gradient subarea, the distance between each of the second light-emitting devices closest to the second coincident boundary and another adjacent one of the second light-emitting devices in the row direction is less than the distance between any two adjacent ones of the first light-emitting devices in the row direction, and the distance between two adjacent ones of the second light-emitting devices in the row direction increases along a direction from a corresponding one of the two sub-coincident boundaries to the first light-emitting area;
• and
• in the non-gradient subarea, the distance between two adjacent ones of the second light-emitting devices in the row direction is constant.