Luminous keyboard

A luminous keyboard comprising:

• a key assembly, a thin-film switch circuit board assembly, a base plate and a light guide plate, the key assembly being disposed on the thin-film switch circuit board assembly, the thin-film switch circuit board assembly being disposed on the base plate, and the base plate being disposed on the light guide plate;
• wherein the base plate and the light guide plate together form at least one aperture structure passing through the base plate and the light guide plate, the thin-film switch circuit board assembly including a thin-film switch circuit board and a light-emitting unit, the thin-film switch circuit board including a protrusion that protrudes toward the at least one aperture structure, and the light-emitting unit being disposed at a bottom surface of the protrusion and extending downward such that a lower end of the light-emitting unit is lower than a lower surface of the base plate so that the light-emitting unit emits light into the light guide plate directly.