Abstract: An antenna structure is provided, which is disposed in a clearance area in a casing of an electronic device, and a magnetic element is arranged in the clearance area. The antenna structure includes an antenna radiator, a feeding contact and a grounding portion. The antenna radiator is located on the magnetic element and includes a first connection end and a second connection end. The feeding contact is electrically connected to the first connection end of the antenna radiator to transmit and receive a radio frequency signal. The grounding portion is located in the clearance area and connected to the second connection end of the antenna radiator.

Abstract: A method and a system for operating an electric apparatus are provided. In the present invention, first, an image capturing unit is enabled for capturing an image. Next, a palm component on the image is detected. Afterwards, a center of mass in the palm component is calculated according to a principal component analysis (PCA) algorithm, so as to use the center of mass to simulate a cursor. Then, a width of the palm of the palm component is calculated. Finally, the width of the palm is compared with a threshold so as to execute a click action if the width of the palm is greater than the threshold.

Abstract: A method and a system for operating an electric apparatus are provided. In the present invention, first, an image capturing unit is enabled for capturing an image. Next, a palm component on the image is detected. Afterwards, a center of mass in the palm component is calculated according to a principal component analysis (PCA) algorithm, so as to use the center of mass to simulate a cursor. Then, a width of the palm of the palm component is calculated. Finally, the width of the palm is compared with a threshold so as to execute a click action if the width of the palm is greater than the threshold.

Abstract: An alignment mark, disposed on a substrate, is provided. The alignment mark includes a first dielectric layer and a metal layer. The first dielectric layer is disposed on the substrate and includes an alignment trench and a contact hole. The metal layer is disposed in the alignment trench and the contact hole, wherein a surface of the metal layer is even with a surface of the first dielectric layer. Because the metal layer and the first dielectric layer have different reflection indexes and different refraction indexes, an alignment light detects the alignment mark according to these differences.