摘要:
A projection lens unit and a thin projector using the same are disclosed. The projection lens unit includes a plurality of lens sets for emitting light carrying an image, and a reflector arranged between adjacent ones of the lens sets or at a downstream end of the lens sets, and adapted to change a direction of light incident on the reflector.
摘要:
A thin projector is disclosed. The thin projector includes a housing having an upright panel shape, an illumination unit arranged in the interior of the housing, the illumination unit generating light and emitting the generated light, a micro device arranged in the interior of the housing, the micro device receiving the light from the illumination unit and producing an image using the received light, and a projection lens unit arranged in the interior of the housing, the projection lens unit including an emission unit adapted to externally emit the image produced by the micro device and arranged to be externally exposed through a front side of the housing.
摘要:
The present invention relates to a RF module and a fabrication method thereof, wherein the packaging steps of a SAW component and a module is carried out simultaneously, thereby simplifying the fabrication process and reducing the size of the module. In the invention, a chip component is mounted on a substrate having component-connecting patterns thereon, and a SAW component in a bare chip is flip-bonded to the substrate. Thereafter, the SAW component is selectively laminated with a film and then molded; or the SAW component and the chip component are laminated as a whole and metal-plated, without any molding; or a metal wall is disposed between the substrate and the SAW component and then molded. As a result, this reduces the size of the RF modules, and simplifies the fabrication process, thereby benefiting from a cost-saving effect.
摘要:
The present invention provides a SAW device package used in filters, duplexers, etc., in particular, which simplifies sealing process for protecting the active area of a SAW device. The SAW device package comprises a wiring substrate, as a package base having connection patterns, having bare chip attaching means. A bare chip is flip-bonded and attached to the attaching means on the wiring substrate while maintaining the airtight condition. A resin molding part covers the top of the bare chip to seal the device. The invention facilitates maintaining an airtight condition of the active area which affects the operational characteristics of the device, and simplifies the manufacturing processes. Furthermore, the improved structure of the wiring substrate blocks the external moisture permeation, thereby enabling the device to better withstand the external changes.
摘要:
Disclosed herein is a stack type surface acoustic wave package. The surface acoustic wave package comprises a first bare chip having a plurality of electrodes formed thereon, a second bare chip having a plurality of electrodes and via-holes formed thereon, a connecting portion electrically connecting the first bare chip to an upper surface of the second bare chip such that the electrodes of the first bare chip face the electrodes of the second bare chip, and a sealing member provided on the first and second bare chips to form an air-tight space on an operating surface between the first and second bare chips. The surface acoustic wave package can prevent deformation due to thermal impact from the outside during a packaging process, enhancing reliability of the product, minimizing the size of the product, and reducing manufacturing costs by reducing the number of components and material costs.
摘要:
A variable capacity rotary compressor including first and second compression chambers having different capacities, and a rotating shaft. First and second eccentric cams are mounted to the rotating shaft to be eccentric in a same direction. First and second eccentric bushes are fitted over the first and second eccentric cams to make an angle between eccentric lines of the first and second eccentric bushes be less than 180°. A locking pin functions to change a position of the first or second eccentric bush to a maximum eccentric position. Further, a slot is formed on the rotating shaft between the first and second eccentric bushes. In this case, the slot having a predetermined length is formed to have a same angle as the angle between the eccentric lines of the first and second eccentric bushes. The locking pin is inserted into the slot.
摘要:
A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, and thereby prevent noise from being generated and increase durability. The variable capacity rotary compressor includes a housing to define first and second compression chambers having different capacities therein. First and second eccentric cams are mounted to a rotating shaft to be placed in the first and second compression chambers, respectively. First and second eccentric bushes are rotatably fitted over the first and second eccentric cams, respectively. First and second rollers are rotatably fitted over the first and second eccentric bushes, respectively. First and second vanes partition the first and second compression chambers, respectively. A locking unit functions to make one of the first and second eccentric bushes be eccentric from the rotating shaft while making a remaining one of the first and second eccentric bushes be released from eccentricity from the rotating shaft, according to a rotating direction of the rotating shaft. A restraining unit is outwardly projected from the rotating shaft by a centrifugal force when the rotating shaft is rotated, thus restraining the first and second eccentric bushes.
摘要:
A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, thus preventing noise from being generated and increasing durability. The compressor includes a housing to define two compression chambers having different capacities therein. A rotating shaft is rotated in the compression chambers. Two eccentric cams are mounted to the rotating shaft. Two eccentric bushes are rotatably fitted over the eccentric cams. Two rollers are rotatably fitted over the eccentric bushes. Two vanes are installed in the compression chambers to be reciprocated in a radial direction of the rotating shaft. A cylindrical connecting part integrally connects the eccentric bushes to each other, with a locking slot being provided around the connecting part. A locking pin is mounted to the rotating shaft to project from the rotating shaft, and is locked by either of opposite ends of the locking slot, according to a rotating direction of the rotating shaft, thus making one of the eccentric bushes eccentric from the rotating shaft while making a remaining one of the eccentric bushes be released from eccentricity from the rotating shaft. A restraining unit outwardly moves from the rotating shaft by a centrifugal force when the rotating shaft is rotated, to restrain the connecting part.
摘要:
Disclosed is a method of operating a refrigerator, including: providing a plurality of usage environment information which includes national information; selecting the usage environment information corresponding to a nation or region where the refrigerator is used among the plurality of usage environment information; and controlling operation of the refrigerator based on the selected usage environment information.
摘要:
An optical protection sheet includes a foamy resin layer. The optical protection sheet includes a base film containing a light diffusion material and the foamy resin layer formed on the base film and containing micro-bubbles.