Sensing device and terminal device

A terminal device comprising:

• a housing and a sensing device;
• wherein:
• the housing is provided with an opening, and the sensing device is fixed to the housing and positioned in the opening;
• the sensing device comprises a circuit board, a biometric sensor, at least one light-emitting element, a cover with a light-transmitting region, a light guide plate and a light concentrating structure;
• the biometric sensor is installed on the circuit board;
• the light guide plate is fixed between the biometric sensor and the cover;
• the light concentrating structure is disposed on the light guide plate and corresponds to the light-transmitting region;
• the light-emitting element is installed on the circuit board and positioned on one side of the biometric sensor;
• the light-emitting element has a side light-emitting end, and the side light-emitting end corresponds to the light guide plate;
• and
• light emitted by the light-emitting element from the side light-emitting end is transmitted into the light guide plate, and is concentrated to the light-transmitting region by the light concentrating structure.