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: Semiconductor device structures having gate structures with tunable threshold voltages are provided. Various geometries of device structure can be varied to tune the threshold voltages. In some examples, distances from tops of fins to tops of gate structures can be varied to tune threshold voltages. In some examples, distances from outermost sidewalls of gate structures to respective nearest sidewalls of nearest fins to the respective outermost sidewalls (which respective gate structure overlies the nearest fin) can be varied to tune threshold voltages.

Abstract: A device capable of enabling a balloon to stand up includes a balloon and a base stand. The base stand has a stand body being a hollow semi-circular structure having an upward-facing opening, and the stand body has a first prop, multiple second props and at least a couple of fixing plates provided therein. The stand body can have an inflated balloon attached thereto by using the fastening groove on an upper end of the first prop, so as to place a protruding end of an outlet of the balloon in the clamping groove between the two fixing plates, that is, to combine the balloon with the opening end of the stand body, thus enabling the balloon to stand up stably.

Abstract: A planar-part-based toy assembly set includes planar parts that have different shapes and are made by stamping a planar material board. The planar parts include a body piece and a limb piece. The body piece has a slotted ring for coupling with the limb piece. The slotted ring has a cutting slot, a narrow section and, a wide section. The limb piece has a closed ring, or a slotted ring as stated above. The closed ring of the limb piece can pass through the cutting slot of the slotted ring of the body piece and be mounted around the narrow or wide section of the slotted ring. When the closed ring is around the narrow section, the limb piece can freely swing, and when the closed ring is around the wide section, the limb piece is fixed at a specific angle, which can be later adjusted by the player.

Abstract: A planar-part-based toy assembly set includes planar parts that have different shapes and are made by stamping a planar material board. The planar parts include a body piece and a limb piece. The body piece has a slotted ring for coupling with the limb piece. The slotted ring has a cutting slot, a narrow section and, a wide section. The limb piece has a closed ring, or a slotted ring as stated above. The closed ring of the limb piece can pass through the cutting slot of the slotted ring of the body piece and be mounted around the narrow or wide section of the slotted ring. When the closed ring is around the narrow section, the limb piece can freely swing, and when the closed ring is around the wide section, the limb piece is fixed at a specific angle, which can be later adjusted by the player.