As illustrated in FIG. 24, the wearable device 100 may display an authentication region 2410 by using a laser or an LED. When performing the vein authentication, the wearable device 100 may display the authentication region 2410 in order to notify that a vein image in any region of the user wearing the wearable device 100 is captured.
FIG. 25 is a diagram of a sensor arrangement of a wearable device 100 according to an exemplary embodiment. For example, the wearable device 100 may include a sensor 110 on a side surface thereof, which may include at least one light source 111 and at least one camera 112.
In the case of a smart watch, the sensor 110 may be disposed on a side surface of the smart watch to capture a vein image of the back of a hand of a user wearing the smart watch. The smart watch may capture the vein image of the back of a user's hand or an image of a shape of a user's finger to perform authentication.
FIG. 26 is a diagram of a sensor arrangement of a wearable device 100 according to an exemplary embodiment. For example, the wearable device 100 may include a sensor 110 on a front surface thereof, which may include at least one light source 111 and at least one camera 112.
