Abstract: An air purification module and an air purifier formed thereof are revealed. An air purification module is a standardized module formed by an enclosing casing, at least one ultraviolet light emitting diode (UV LED) and at least one photocatalyst filter. While in use, the UV LED is electrically connected to the power source to emit UV light and drive the photocatalyst filter to be in an activated state for decomposition of bacteria, removal of odors and absorption of particulate pollutants in air flowing in, through and out of an axial air passage inside the enclosing casing. Thereby good air purification is achieved. The air purifier includes a housing with a number of air purification module mounted therein, corresponding fans, and at least one power unit. Thereby the use efficiency of the air purifier is increased and consumers have more choices.

Abstract: A path detection system and a path detection method generating laser patterns by a diffractive optical element (DOE) are revealed. The path detection system is arranged at a mobile device while in use. A laser source projects structured light toward a forward path of the mobile device through the DOE. The structure light includes a transverse baseline and at least one transverse computational line. Then a lens is used to capture images of the structured light. When there is obstacle in a forward path of the mobile device, an image processing unit makes comparisons and performs computation according to changes in position and distance of the image of the respective transverse computational line relative to the X axis and the Y axis of the transverse baseline. Thus the relative position and distance of the obstacle in the forward path is checked in a real time manner.

Abstract: A path detection system and a path detection method generating laser patterns by a diffractive optical element (DOE) are revealed. The path detection system is arranged at a mobile device while in use. A laser source projects structured light toward a forward path of the mobile device through the DOE. The structure light includes a transverse baseline and at least one transverse computational line. Then a lens is used to capture images of the structured light. When there is obstacle in a forward path of the mobile device, an image processing unit makes comparisons and performs computation according to changes in position and distance of the image of the respective transverse computational line relative to the X axis and the Y axis of the transverse baseline. Thus the relative position and distance of the obstacle in the forward path is checked in a real time manner.

Abstract: A shooting training and game system with virtual targets is revealed. The system includes a main controller, a projection module, a lens module, and a shooting tool. The shooting tool can be a real gun or a laser gun. By hardware and software of the main controller, the projection module projects a light beam to a screen therefront to form a target image area with at least one static or dynamic virtual target. Then the lens module is aligned to the target image area for detecting and obtaining relative positions and coordinates of each shot formed on the target image area by the shooting tool. Thereby an error of each shot is calculated for evaluation of shooting accuracy. The shooting training and game system is more interesting, optional and used more efficiently.

Abstract: A shooting training and game system with virtual targets is revealed. The system includes a main controller, a projection module, a lens module, and a shooting tool. The shooting tool can be a real gun or a laser gun. By hardware and software of the main controller, the projection module projects a light beam to a screen therefront to form a target image area with at least one static or dynamic virtual target. Then the lens module is aligned to the target image area for detecting and obtaining relative positions and coordinates of each shot formed on the target image area by the shooting tool. Thereby an error of each shot is calculated for evaluation of shooting accuracy. The shooting training and game system is more interesting, optional and used more efficiently.

Abstract: An image-based virtual interactive device and implementing method thereof is provided wherein a projection module is used to project an image-based virtual interactive interface. When the user operates in the range of the image-based virtual interactive interface, a photosensing module and a tracking module simultaneously sense and capture the characteristics of the user's limb movements, and an identification module determines whether an operating command has been performed. Once it is performed, the operating command is then sent to an electronic device to drive corresponding application programs so as to perform a corresponding action. In this manner, the user can directly conduct human-computer interaction with the electronic device merely through limb movement, without contacting a physical medium.