Abstract: A display method of a light field image adapted to a light field display apparatus is provided. The display method includes the following: providing an image having a plurality of depth values, wherein the depth values represent degrees of distance of the image; respectively obtaining a plurality of pixels in the image corresponding to the depth values respectively falling within a plurality of different extended depth value ranges based on the extended depth value ranges to from a plurality of layered images, wherein the extended depth value ranges are different from each other and are partially overlapped in sequence; forming the light field image based on the plurality of layered images; and providing a signal corresponding to the light field image to a display of the light field display apparatus. In addition, the light field display apparatus is also provided.

Abstract: An optical element configured to allow an image beam passing through is provided. The optical element includes a first and a second birefringent layer and a gas layer between the first and the second birefringent layer. An extension direction of the gas layer is inclined with respect to an extension direction of the optical element, wherein the image beam passes through the first birefringent layer, the gas layer and the second birefringent layer in sequence. A first and a second sub image beam having different deflection angles are generated from the image beam when the image beam enters the gas layer. After the first and the second sub image beam are emitted from the second birefringent layer, a transmission path of the first and the second sub image beam are offset from each other by an offset distance, thereby improving resolution of an image to be viewed.

Abstract: The invention discloses a near-eye display device including a display panel, a liquid crystal layer, and a lens element. The display panel is configured to provide an image light beam. The liquid crystal layer is disposed adjacent to the display panel, and the image light beam passes through the liquid crystal layer. The liquid crystal layer is disposed between the display panel and the lens element. Phase modulation occurs to at least a portion of the liquid crystal layer to modulate the image light beam.

Abstract: An image display apparatus that displays a stereo image floating in mid-air and is able to be observed at an oblique angle of view. The image display apparatus includes an image display device, which includes a display surface and an image calculating unit. The image display device is configured to display an un-reconstruction image on the display surface by the image calculating unit. A lens array layer is disposed on the display surface of the image display device. The lens array layer includes a base and a plurality of lenses. The lenses are disposed on a surface of the base. The lens array layer is configured to reconstruct the un-reconstruction image on the display surface as an integrated image so as to reproduce a stereo image.

Abstract: A stereoscopic display comprises a flat-panel display and an optical layer disposed thereon. The optical layer further includes a lens array layer and a micro-structure layer. The flat-panel display has a display plane. The lens array layer has a base and a plurality of lens with focusing function. The lens array layer adjusts the light field. The micro-structure layer connects to the lens array layer, and includes a substrate and a plurality of micro structures. The micro-structure layer modulates the direction of light so that a stereo image which allows an oblique angle of view natural to the user is displayed.

Abstract: A stereoscopic display comprises a flat-panel display and an optical layer disposed thereon. The optical layer further includes a lens array layer and a micro-structure layer. The flat-panel display has a display plane. The lens array layer has a base and a plurality of lens with focusing function. The lens array layer adjusts the light field. The micro-structure layer connects to the lens array layer, and includes a substrate and a plurality of micro structures. The micro-structure layer modulates the direction of light so that a stereo image which allows an oblique angle of view natural to the user is displayed.

Abstract: Disclosed is a control method for stereolithography structure, including the steps of: providing a stereolithography structure including a main circuit system, an interface system, and a USB transmission interface.

Abstract: Disclosed is a control method for stereolithography structure, including the steps of: providing a stereolithography structure including a main circuit system, an interface system, and a USB transmission interface.

Abstract: A sewing machine includes a main frame including a needle seat, a beam, and a head supported by the beam. The head includes elements for sewing operation in association with the needle seat. A fixed seat is fixed to the beam and a rotational seat is fixed to the head to turn therewith. The rotational seat and the fixed seats include aligned axial holes. A shaft sleeve extends from the rotational seat and rotatably extends through the axial hole of the fixed seat. The head and the rotational seat are movable relative to the fixed seat between an operative position allowing sewing operation and an inoperative position angularly spaced from the operative position. A distance between the head and the needle seat is increased when the head is moved from the operative position to the inoperative position, allowing easy insertion and removal of thick materials during a sewing operation.

Abstract: An airflow shift switch for the compressed air valve comprises a valve seat, an intake stem, a retaining assembly, an intake connector and an nozzle connector, in which when the collar of the intake stem is turned and aligned along the first through hole, the airflow will enter through the intake connector which links to the first through hole and pass a plurality of guides holes on the ring block and penetrate into the inner channel of the intake stem; when the airflow gushes out of the guide holes, there creates a thrust force which bring down the top airflow to move down, the dust or dirt deposited on the top is therefore sucked or removed. This effects dust collection. When the collar is turned to other direction, the airflow will come in through the intake connector and leave the nozzle connector to make it as a dust sweeper.

Abstract: A supporting table for spools, comprises a supporting post. A positioning collar is disposed at the lower portion of the supporting post. The positioning collar has a threaded central opening and a raised plateau. A supporting bracket having a central opening is rotationally enveloped onto the raised plateau of the positioning collar. A plurality of spokes and each of the spokes is connected equiangularly to the peripheral of the supporting bracket. The other end of the spoke is provided with a supporting disk and a retaining post in which a spool can be releasably positioned thereof. And a plurality of radial through holes in which a biased spring and a ball are disposed between the supporting collar and the supporting bracket such that the supporting bracket is selectively positioned with respect to the supporting collar. Accordingly, a plurality of spools having different colors and sizes can be disposed on the supporting table for readily use when needed.

Abstract: A non-suspension type thread feeder including a rack post fixedly secured to a part of a sewing machine, a hollow, truncated, split cone revolvably and vertically adjustably mounted on the rack post to hold a spool of thread, the hollow, truncated, split cone being synchronously turned with the spool of thread when the thread of the spool of thread is pulled.