Backlight module and luminous keyboard using the same

A luminous keyboard, comprising:

• a light guide plate comprising an escape opening;
• a circuit board disposed under the light guide plate;
• an electronic component disposed on the circuit board, and at least a part of the electronic component being located in the escape opening;
• a reflective sheet disposed on a rear surface of the light guide plate, wherein the reflective sheet comprises a reflective sheet opening corresponding to the escape opening;
• a light-emitting component disposed at the light guide plate;
• a base plate disposed on the light guide plate, wherein the base plate and the circuit board are disposed on two opposite sides of the light guide plate;
• and
• a key switch structure disposed on the base plate.

A luminous keyboard, comprising:

• a key switch structure;
• a light guide plate being disposed under the key switch structure and comprising an escape opening;
• a reflective sheet disposed under the light guide plate;
• a circuit board disposed under the reflective sheet;
• an electronic component coupled to the circuit board, and at least a part of the electronic component being located in the escape opening;
• a light-emitting component coupled to the circuit board and disposed on a surface of the light guide plate, wherein the light-emitting component and the electronic component disposed on a same side of the circuit board are of different heights;
• a light-shielding sheet disposed between the key switch structure and the light guide plate, wherein the light-shielding sheet covers the electronic component;
• and
• an adhesive layer disposed between the reflective sheet and the circuit board, wherein a thickness of the adhesive layer is less than a thickness of the light guide plate, and the thickness of the light guide plate is less than a height of the light-emitting component.