Abstract:
A centrifugal fan includes a housing, a driving device, and a fan impeller. The housing has a hollow chamber which has a central axis. The driving device is located at the central axis of the hollow chamber. The fan impeller is disposed in the hollow chamber and includes a hub, several blades, and several fins. The hub is connected with the driving device. The blades are disposed around the hub. Each blade has a windward surface and a leeward surface. Each fin extends from the windward surface of one of the blades, outward by an arc surface from the windward surface starting from a location near the central axis, and further extends to the leeward surface of an adjacent blade.
Abstract:
A portable electronic device including a base, a lid and a hinge is provided. The base has a control unit and a proximity sensor. The proximity sensor is electrically connected to the control unit. The lid has a panel electrically connected to the control unit. The hinge is used for connecting the base with the lid. When the proximity sensor detects that the angle between the lid and the base exceeds a predetermined angle, the control unit performs a predetermined operation.
Abstract:
A method of manufacturing a sucker is provided in this invention. The method includes steps as forming a sucker by an injection molding; heating the sucker; and cooling the sucker down to a room temperature so that an attaching surface of the sucker is substantially flat.
Abstract:
A server rack system including a plurality of power supply units, a monitoring circuit, a rack management controller (RMC), and a plurality of server nodes is provided. The monitoring circuit is for monitoring the power supply units. The RMC is for monitoring the power supply units. When the monitoring circuit and/or the RMC finds that at least one of the power supply units failed to output a normal voltage, an operation status of the server nodes is lowered or at least one of the server nodes is forcibly shut down.
Abstract:
A battery charge-discharge path management circuit includes a first determination circuit, a second determination circuit and a switch circuit. The first determination is for determining whether the battery module and the electronic device are in a charge state or in a discharge state at the same time. The second determination circuit is for determining whether the electronic device is coupled to the battery module. The switch circuit forms a charge-discharge path between the battery module and the electronic device both if the battery module and the electronic device are in the discharge state or in the charge state at the same time and if the electronic device is coupled to the battery module.
Abstract:
A server cluster including a network switch and multiple server nodes is provided. The network switch is connected to an external network. Each server node performs an operation system and respectively includes a network port, a network chip and a south bridge chip. The network port is connected to the network switch via a cable. The network chip outputs a power-off signal according to a received power-off packet after the network switch is started. The south bridge chip outputs a shutdown signal to shut down the server node according to the power-off signal when the server node is turned on and the operation system is working normally.
Abstract:
A server cluster including a network switch and multiple server nodes is provided. The network switch is connected to an external network. Each server node includes a network port, a network chip and a control unit. The network port is connected to the network switch via a cable. The network chip detects the cable to obtain a connection state with the external network at the server node after the network switch is started, and accordingly outputs a connection state signal. The control unit turns on or shuts down the server node according to the connection state signal and an on/off state of the server node.
Abstract:
A display device includes a display portion, a cantilever, a rotating disc unit, a base, and two cables. The cantilever has an upper end connected with the display portion, allowing the display portion to rotate relative to the cantilever about a first axis. The rotating disc unit is connected with a bottom of the cantilever, allowing the cantilever to pivot relative to the rotating disc unit about a second axis, which is parallel with the first axis. The base is connected to the rotating disc unit in a manner allowing the same to rotate relative to the base about a third axis, which is vertical to the first and second axes. The cables extend downward from the display portion along the to cantilever and are inserted into the rotating disc unit. The cables enter the base after being placed adjacent to one another within the rotating disc unit.
Abstract:
A touch device to sense and compute the coordinate of a touch object is provided. The touch device comprises a panel, a light-emitting element, an image sensor, a reflective strip and a processing unit. The panel has a sensing area surrounded by first to fourth boundaries where the first and the third boundaries define an x direction and the other two boundaries defines y direction. The light-emitting element and the image sensor are located on the first boundary with a specific distance therebetween. The reflective strip is located on the second to fourth boundaries. When the touch object touches the sensing area, a first and a second light path from the light-emitting element to the image sensor are blocked to form a real and a virtual image such that the processing unit computes the coordinate of the touch object according to the real and the virtual images. A touch method is disclosed herein as well.