Abstract: A light information receiving method, a method and a unit for the recognition of light-emitting objects are provided. The light information receiving method includes the following steps. A light-emitting object array is captured to obtain a plurality of images, wherein the light-emitting object array includes at least one light-emitting object. A temporal filtering process is performed to the images to recognize a light-emitting object. A light-emitting status of the light-emitting object array is recognized according to the light-emitting object location. A decoding process is performed according to the light-emitting status to output an item of information.

Abstract: A light emitting device, a light receiving device and a data transmission system and a data transmission method using the same are provided. The data transmission system includes the light emitting device and the light receiving device. The light emitting device includes a light emitting unit and a control circuit, and the light receiving device includes an image capture unit, a recognition unit and a decoding unit. The control circuit controls the light emitting unit to sequentially display a plurality of pattern images in a plurality of frame times to form a spatiotemporal pattern image according to setting data corresponding to a temporal domain and a spatial domain. The image capture unit captures the spatiotemporal pattern image. The recognition unit recognizes the spatiotemporal pattern image to output recognized data. The decoding unit decodes the recognized data to output decoded data.

Abstract: A sliding cover for protecting camera lens and switching the power of the camera, comprising a cover plate and a permanent magnet. The cover plate is slideably connected with the front shell of the camera, a magnetic induction switch is installed at the inner side of the front shell. Furthermore, the permanent magnet is connected to the cover plate, when the lens is exposed while the cover plate is sliding away, the permanent magnet will then be close to the inducible switch and switch the power automatically. For sliding smooth, a few pads with low friction coefficient and wear-resistant property can be installed between the cover plate and the front shell of the camera; preferably, the inner side of the of the cover plate can further installed a rolling wheel to smooth the sliding and prevent scratch on the front shell surface when been highly pressed.

Abstract: A manually adjustable apparatus for a zoom lens includes a body, a lens set, a sliding base, a rack sliding base, and a transmission gear. The lens set is installed at the body. There is an outer gear located at the rear end of the lens cone of the lens set. The sliding base is fastened at the body. On the bottom surface of the rack sliding base, there is a rack. The transmission gear is pivoted on the body and is interlocked with the rack and the outer gear. The present invention turns the rack sliding base manually to make the lens cone rotate and move via the rack, the transmission gear, and the outer gear for controlling and zooming the lens set. No power is needed so that the power loading of the still camera is reduced, and the cost of the still camera is reduced.

Abstract: A sponge sleeve installation appliance for installing a sponge sleeve onto a roller has an elongated socket body including a sleeve portion and a tapered portion. The sleeve portion has an outer circular diameter slightly larger than an inner diameter of the sponge sleeve which when not deformed defines an interior space for accommodating at least part of the roller inserted from a bottom of the sleeve portion. The tapered portion has a cone shape with a bottom connected to a top of the sleeve portion which protrudes and tapers off from the sleeve portion in a longitudinal direction of the sleeve portion.

Abstract: A cleaning device for cleaning the dirt is disclosed. The cleaning device includes a container for receiving the cleaning material therein, a permeating element disposed in the container for introducing the cleaning material, and a cleaning head mounted on one end of the container and connecting with the permeating element for cleaning the dirt.

Abstract: A sponge sleeve installation appliance for installing a sponge sleeve on a roller is disclosed. The appliance comprises a longitudinal socket body and a base. The longitudinal socket body includes a sleeve portion and a tapered portion, both being longitudinally continued. The sleeve portion is of an outer circular diameter slightly larger than the inner diameter of the sponge sleeve of an unexpanded status and internally defines a receiving space permitting the insertion of the roller from one end of the sleeve portion and accommodating at least part of the roller. With the above simple structure, the sponge sleeve can be easily slipped onto the roller.