Abstract: An offset coupling includes a first coupling disc, a second coupling disc, and a multi-link structure. The first coupling disc includes a first pivoting portion, a second pivoting portion, and a third pivoting portion surround a first central axis. The second coupling disc includes a fourth pivoting portion, a fifth pivoting portion, and a sixth pivoting portion surround a second central axis. The multi-link structure includes a first linkage group, a second linkage group, and a third linkage group, two first cranks of the first linkage group are respectively pivotally connected to the first pivoting portion and the fourth pivoting portion, two second cranks of the second linkage group are respectively pivotally connected to the second pivoting portion and the fifth pivoting portion, and two third cranks of the third linkage group are respectively pivotally connected to the third pivoting portion and the sixth pivoting portion.

Abstract: An offset coupling includes a first coupling disc, a second coupling disc, and a multi-link structure. The first coupling disc includes a first pivoting portion, a second pivoting portion, and a third pivoting portion surround a first central axis. The second coupling disc includes a fourth pivoting portion, a fifth pivoting portion, and a sixth pivoting portion surround a second central axis. The multi-link structure includes a first linkage group, a second linkage group, and a third linkage group, two first cranks of the first linkage group are respectively pivotally connected to the first pivoting portion and the fourth pivoting portion, two second cranks of the second linkage group are respectively pivotally connected to the second pivoting portion and the fifth pivoting portion, and two third cranks of the third linkage group are respectively pivotally connected to the third pivoting portion and the sixth pivoting portion.

Abstract: An interactive display system includes an input device and an image interaction module. The input device has a touch portion including a built-in first light-emitting module and a built-in second light-emitting module. The image interaction module includes a display module, a first image-capturing module, a second image-capturing module and a processing module. The processing module captures invisible light generated by the first light-emitting module through the first image-capturing module, for determining and obtaining the position of the touch portion. The processing module captures visible light generated by the second light-emitting module through the second image-capturing module according to the position of the touch portion, for determining and obtaining a predetermined color light source provided by the visible light generated by the second light-emitting module.

Abstract: An interactive display system includes an input device and an image interaction module. The input device has a touch portion including a built-in first light-emitting module and a built-in second light-emitting module. The image interaction module includes a display module, a first image-capturing module, a second image-capturing module and a processing module. The processing module captures invisible light generated by the first light-emitting module through the first image-capturing module, for determining and obtaining the position of the touch portion. The processing module captures visible light generated by the second light-emitting module through the second image-capturing module according to the position of the touch portion, for determining and obtaining a predetermined color light source provided by the visible light generated by the second light-emitting module.

Abstract: A method for calibrating position of light point is used for an interactive projection system including an image capture device. The image capture device includes an image sensor and an optical filter. The method includes the following steps. A plurality of calibrating patterns formed by visible light is individually projected on a screen. The distance between the calibrating pattern with big area and an optical axis of the image sensor is larger than that between the calibrating pattern with small area and the optical axis. Next, the exposure time of the image sensor is adjusted so the image sensor can capture the images of the calibrating patterns through the optical filter. According to the images of the calibrating patterns, a plurality of coordinate positions is gotten. Then, the coordinate positions are adjusted according to a standard coordinate.

Abstract: A method for calibrating position of light point is used for an interactive projection system including an image capture device. The image capture device includes an image sensor and an optical filter. The method includes the following steps. A plurality of calibrating patterns formed by visible light is individually projected on a screen. The distance between the calibrating pattern with big area and an optical axis of the image sensor is larger than that between the calibrating pattern with small area and the optical axis. Next, the exposure time of the image sensor is adjusted so the image sensor can capture the images of the calibrating patterns through the optical filter. According to the images of the calibrating patterns, a plurality of coordinate positions is gotten. Then, the coordinate positions are adjusted according to a standard coordinate.

Abstract: A multi-mode interactive projection system includes a pointing device, an infrared capturing device, and a projection device. A timing generation module of the pointing device generates several timing signals, and controls the pointing device to execute one light emitting mode according to one timing signal. A light emitting module of the pointing device is controlled by the timing generation module, and generates infrared in a light emitting time according to the executed light emitting mode. In a detection time, the light emitting time corresponds to one light emitting mode. The infrared capturing device periodically captures the infrared. A projection module is controlled by a background image and a writing image outputted by a host device, and projects the image to screen. The host device determines the light emitting mode and continuously captures coordinate points of infrared by the infrared capturing device in the detection time.

Abstract: A double safety control device for a push switch comprises: a body, a conducting seat, a plurality of push buttons, a guiding plate, a positioning piece, a spring, a safety leaf spring, and a connecting member for connecting to power source. The respective components are positioned on the body, the push buttons serve to press the conducting seats, the connecting member is arranged at a predetermined distance away from the safety leaf spring, the guiding plate is formed with slant protrusions to be pressed by the push buttons, and the guiding plate cooperates with the spring and the isolating protruding member to push the safety leaf spring. With the arrangement of the abovementioned components, the safety leaf spring of the present invention can activate the power source after the switch pressing action is confirmed, thus preventing the occurrence of electricity leakage.

Abstract: A switch assembly has a base, a cover and multiple conductive slices. The base has an extending board and multiple inserting recesses. The inserting recesses are formed in the extending board and each have two mounting posts and an inserting hole. The mounting posts are formed on and protrude up from the recess. The inserting hole is formed through the extending board. The cover is mounted over the base. The conductive slices are attached to the inserting recesses and each has an elastic tab and a mounting tab. The mounting tab is contacted with the elastic tab, is attached to the inserting recess and has two mounting holes, an opening and two clamping slices. The mounting holes are formed through the mounting tab and correspond to the mounting posts. The opening is formed through the mounting tab and corresponds to the inserting hole. The clamping slices are attached to the mounting tab.