A dual clutch for coupling an engine-side input shaft with a first transmission-side andor a second transmission-side output shaft. An output unit is disposed on the base. In addition, some embodiments of the instrument may be configured to irrigate the instrument-blood interface with RGDClfA peptides, a bicarbonate solution, or both to further repel the fibrinogen and thereby inhibit the formation of coagulum. The core-shell phosphors may be incorporated into the light guide plate or be positioned on the light guide plate as a separate layer.