Abstract: An optical touch control system and an optical sensor thereof are provided. The optical sensor can be applied to a display having a display surface. The optical sensor includes a connecting frame, a light curtain module and a light emitter. The connecting frame has a first end portion and a second end portion opposite the first end portion. The light curtain module is disposed between the first end portion and the second end portion of the connecting frame. The light curtain module includes a light emitter electrically connected to the display so as to generate an invisible light curtain parallel to the display surface. The optical detection module is disposed on the second end portion of the connecting frame. The optical detection module includes a light detector electrically connected to the display so as to retrieve information about a touch location where an object touches the invisible light curtain.

Abstract: The present disclosure provides a projection system and a light screen generating device thereof. The light screen generating device includes a movable carrier module, a first light-emitting module, and a second light-emitting module. The first light-emitting module includes a plurality of first light-emitting structures disposed on the movable carrier module. Each of the first light-emitting structures generates an invisible light screen, and the invisible light screens respectively generated by the first light-emitting structures are mated with each other to form a spliced invisible light screen for increasing light emission uniformity. The second light-emitting module includes a second light-emitting structure that is disposed on the movable carrier module and that generates a visible light screen parallel to and overlapping the spliced invisible light screen.

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: The present invention discloses an interactive projection system with light spot identification, including M pointing devices and a projector, and a control method thereof. A light emitting module of each pointing device selectively generates an infrared light spot, and generates an infrared lighting spot status signal corresponded to the operating status of the light emitting module. A wireless signal transmission module of each pointing device transmits a wireless signal including an identification code and the infrared lighting spot status signal. An infrared light spot capturing module of the projector is used to capture an image indicating the infrared light spot projected on a screen. The interactive projection system correspondingly displays movement tracks in order of the infrared light spots on a monitor according to the image and the wireless signals from the M pointing devices, wherein M is a positive integer and greater than or equal to 1.

Abstract: A speaker unit for a projector includes a first speaker, a fixing portion and a second speaker. Either the first speaker or the second speaker has a central hole to hold the vertical post of a projector. Two holes that are diagonally opposing each other are provided in the inner wall of the central hole. The two holes of the fixing portion may align with the two holes of the first speaker and fasteners may be used to fixedly connect the first speaker with the vertical post. A connective portion is provided on either of the two vertical walls of the first speaker and a connective portion is provided on either of the two vertical walls of the second speaker. Therefore, the second speaker may be connected with the first speaker by these connective portions.

Abstract: A briefing system is used to project images onto a projection screen to form a projection picture. The briefing system comprises a pointer, a projector and a computer electrically connected to the projector. The computer outputs an image signal to the projector. The projector projects an image corresponding to the image signal onto the projection screen to form the projection picture. The indicator is used to project an indication point. The projector also captures the image of the projection picture and the indication point and transfers the image to the computer. The computer then calculates a location where the cursor on the computer screen should reach according to the location of the indication point on the projection picture and moves the cursor on the screen to there.