Abstract: A projection system includes a display device, a wireless presentation gateway, a computer terminal, and a portable device. The display device is used for displaying an image. The wireless presentation gateway is linked to the display device for transmitting image data to the display device. The computer terminal is linked to the wireless presentation gateway for transmitting the image data to the wireless presentation gateway. The portable device is connected to the computer terminal through a communication port for driving the computer terminal, the wireless presentation gateway, and the display device for performing an image display process automatically.

Abstract: A display apparatus has a housing, a base, a system board and a display panel. The base is connected to the housing such that the display apparatus is disposed on a flat surface. The system board is disposed in the housing and has a control system for performing an up-down inversing process for an image transmitted from a signal source. The display panel has a timing controller and a pixel array. Specifically, the display panel is put upside down in the housing such that the pixel array is also upside down, and the timing controller is adjacent to the location connecting the base with the housing. The timing controller is coupled to the system board, to perform a left-right mirroring process for the up-down inversed image.

Abstract: A display apparatus has a housing, a base, a system board and a display panel. The base is connected to the housing such that the display apparatus is disposed on a flat surface. The system board is disposed in the housing and has a control system for performing an up-down inversing process for an image transmitted from a signal source. The display panel has a timing controller and a pixel array. Specifically, the display panel is put upside down in the housing such that the pixel array is also upside down, and the timing controller is adjacent to the location connecting the base with the housing. The timing controller is coupled to the system board, to perform a left-right mirroring process for the up-down inversed image.

Abstract: An installation method and a guiding structure for a connector of a tubeless rim, wherein the method is to use one end of a wire to fix a magnetic attraction element, and the other end of the wire to hook at a connector by an elastic hook which can disengage from the connector after being forced to deform. With the abovementioned method and the structure, the present invention can use the wire to quickly position the connector and quickly detach the wire. Hence, the installation of the connector of a tubeless rim can be greatly simplified and the connector can not be restricted by the raw edge or the installation direction.

Abstract: An angle adjustable stopwatch supporter comprises a fastening seat, a fixed seat, a sleeve and an end cap. The fixed shaft is utilized to position the sleeve and the end cap on the fastening seat. Each end of the sleeve is formed with an arc structure; likewise, the fastening seat and the end cap are formed with an arc structure respectively. In such a manner that the arc structures at both ends of the sleeve are engaged with the arc structures of the fastening seat and the end cap respectively, thus achieving the objective that the axial displacement angle can be adjusted between the fastening seat and the end cap.

Abstract: An angle adjustable stopwatch supporter comprises a fastening seat, a fixed seat, a sleeve and an end cap. The fixed shaft is utilized to position the sleeve and the end cap on the fastening seat. Each end of the sleeve is formed with an arc structure; likewise, the fastening seat and the end cap are formed with an arc structure respectively. In such a manner that the arc structures at both ends of the sleeve are engaged with the arc structures of the fastening seat and the end cap respectively, thus achieving the objective that the axial displacement angle can be adjusted between the fastening seat and the end cap.