Abstract: A resonant switching power converter circuit including: a switching converter, a control circuit and a pre-charging circuit; wherein the control circuit controls a first switch of the switching converter in a pre-charging mode, so as to control electrical connections between a first power and at least one of plural capacitors of the switching converter, and to control other switches of the switching converter, so as to control the pre-charging circuit to charge at least one capacitor to a predetermined voltage; wherein in a start-up mode, the plural switches control electrical connections of the capacitors according to first and second operation signals, such that after the pre-charging mode ends, the switching converter subsequently operates in the start-up mode; wherein in the start-up mode, the first and second operation signals have respective ON periods, and the time lengths of the ON periods increase gradually.

Abstract: An integrated circuit package including electrically floating metal lines and a method of forming are provided. The integrated circuit package may include integrated circuit dies, an encapsulant around the integrated circuit dies, a redistribution structure on the encapsulant, a first electrically floating metal line disposed on the redistribution structure, a first electrical component connected to the redistribution structure, and an underfill between the first electrical component and the redistribution structure. A first opening in the underfill may expose a top surface of the first electrically floating metal line.

Abstract: An exercise device includes a base, a seat assembly mounted on the base, a load mechanism attached to an upright and including a take-up assembly and a flywheel coaxially secured to the take-up assembly, a first rowing unit configured to activate the load mechanism by pulling a spring activated strap, and a second rowing unit configured to activate both the load mechanism and the first rowing unit by pulling the strap and pivotably rotating a handle via a cord which is operatively connected to a pivotal arm on the base.

Abstract: A method is designed to apply a rigid and self-adhesive printed matter to a curved surface of the object. The method includes a first step in which the printed matter is provided with a coating of epoxy resin before the printed matter is baked. After the baking process, the printed matter is contoured to fit the curved surface of the object and is then cooled to take form. The printed matter is attached to the curved surface of the object by the self-adhesive side thereof.

Abstract: A one-way roller clutch is composed of a drive member having a linking portion and a shaft smaller in diameter than the drive member. The shaft is provided with a plurality of rolling column slots, a fastening portion, and a plurality of protruded portions each being located between two rolling column slots. A connection member is provided in the center thereof with a round hole in which the rolling column slots and the protruded portions are contained. Each rolling column slot is of a progressively open shape relative to the wall of the round hole and is provided therein with a rolling column. A fastening member is fastened with fastening portion of the drive member, and that the connection member is securely fitted over the drive member.