Patent ID: 11846799

Abstract:
A backlight module includes a circuit board, a light-emitting element, and a light guide plate. The light-emitting element is disposed on the circuit board. The light guide plate is located above the circuit board and has adjacent first and second single-key light guide regions. The first single-key light guide region has an accommodating groove accommodating the light-emitting element. The light-emitting surface of the he light-emitting element faces the second single-key light guiding region. The first single-key light guide region has light guide structures extending along the normal direction of the light-emitting surface. The light guide structures include a first group, a second group, and a third group arranged in sequence. The light-emitting surface is opposite to the second group in the normal direction. A spacing of the second group is larger than a spacing of the first group and a spacing of the third group.