Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: A semiconductor structure includes a substrate and a semiconductor channel layer over the substrate. The semiconductor structure includes a high-k gate dielectric layer over the semiconductor channel layer, a work function metal layer over the high-k gate dielectric layer, and a bulk metal layer over the work function metal layer. The work function metal layer includes a first portion and a second portion over the first portion. Both the first portion and the second portion are conductive. Materials included in the second portion are also included in the first portion. The first portion is doped with silicon at a first dopant concentration, and the second portion is not doped with silicon or is doped with silicon at a second dopant concentration lower than the first dopant concentration.

Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: An auxiliary unit for a face mask with earloops comprises a rectangular or oval main body, the main body includes first and opposite second end. At least one first hanger and more than one second hangers are arranged on the main body, the first hanger being close to the first end while the second hangers are closer to the second end. The wearer hangs one of loops of the mask on the first hanger and selects one second hanger for securing the other loop, depending on his head circumstances, therefore, the auxiliary unit releases ears from pressures of anchoring the face mask loops and improves experiences of wearing the face mask.

Abstract: A packaging box includes a box and a support received in the box. The support includes a top board, a bottom board opposite to the top board, and a side board interconnecting the top board and the bottom board. The top board defines a hole and forms four limiting boards connecting to the top board and resisting against the bottom board. The limiting boards and the bottom board cooperatively form a receiving chamber. The receiving chamber comprises a standing leg formed from the bottom board. The standing leg is capable of folding relative to the bottom board and cooperatively supporting the support to position on a plane with the side board.

Abstract: A packaging box includes a box and a support received in the box. The support includes a top board, a bottom board opposite to the top board, and a side board interconnecting the top board and the bottom board. The top board defines a hole and forms four limiting boards connecting to the top board and resisting against the bottom board. The limiting boards and the bottom board cooperatively form a receiving chamber. The receiving chamber comprises a standing leg formed from the bottom board. The standing leg is capable of folding relative to the bottom board and cooperatively supporting the support to position on a plane with the side board.