摘要:
A piezoelectric inkjet head includes a plurality of pressure chambers filled with ink that is to be ejected, a manifold to supply ink to the pressure chambers and extending in both sides of each of the pressure chambers parallel to a direction in which the pressure chambers are arranged, a restrictor to connect the manifold to each of the pressure chambers, and to be connected to both ends of each of the pressure chambers in a longitudinal direction, a plurality of piezoelectric actuators respectively corresponding to the pressure chambers, and at least one nozzle respectively connected to each of the pressure chambers, and to be symmetrically arranged with respect to the centerline in a longitudinal direction of each of the pressure chamber. The at least one nozzle includes a first nozzle and at least two second nozzles, the first nozzle is disposed to correspond to the centerline in the longitudinal direction of each of the pressure chambers, and the second nozzles are disposed in both sides of the first nozzle.
摘要:
A robot cleaner and a method of controlling a robot cleaner are provided. The robot cleaner is capable of automatically compensating for and adjusting a moving angle and a position using an appropriate sensor and control algorithm while performing a cleaning operation in a relatively large space. This may reduce a position error, allow a cleaning region to be effectively identified as a region to be cleaned or a region having already been cleaned, thus improving cleaning performance and efficiency.
摘要:
A nozzle plate and printhead allowing for control of a deflection direction of ejected droplets using electro-wetting, and methods of operating and manufacturing the same. The nozzle plate has at least one nozzle for ejecting fluid and includes electrode segments disposed along a circumference of the nozzle, an insulating layer disposed on a surface of each electrode segment so as to contact fluid in the nozzle, the insulating layer divided into at least two insulating layer segments corresponding to the electrode segments, and a wire pattern electrically coupled to the electrode segments.
摘要:
A robot cleaner and a method for controlling the same are provided. A region to be cleaned may be divided into a plurality of sectors based on detection data collected by a detecting device, and a partial map for each sector may be generated. A full map of the cleaning region may then be generated based on a position of a partial map with respect to each sector, and a topological relationship between the partial maps. Based on the full map, the robot cleaner may recognize its position, allowing the entire region to be completely cleaned, and allowing the robot cleaner to rapidly move to sectors that have not yet been cleaned.
摘要:
A piezoelectric inkjet head having piezoelectric actuators for restrictors includes a flow channel plate including an ink inlet through which ink enters, a plurality of pressure chambers into which ink to be ejected is filled, a manifold which is a path to receive ink from the ink inlet and to supply the received ink to the pressure chambers, a plurality of restrictors that connect the manifold to the pressure chambers, and a plurality of nozzles to eject ink from the pressure chambers to an outside thereof. The piezoelectric inkjet head also includes a plurality of first piezoelectric actuators formed on the flow channel plate corresponding to positions of the pressure chambers to provide a driving force to each of the pressure chambers to eject ink to the outside. The piezoelectric inkjet head also includes a plurality of second piezoelectric actuators formed on the flow channel plate corresponding to positions of the restrictors to change cross-sectional areas of the restrictors.
摘要:
A piezoelectric inkjet head and a method of manufacturing the piezoelectric inkjet head. The piezoelectric inkjet head includes three single crystal silicon substrates bonded to each other. An upper substrate includes an ink inlet, a plurality of pressure chambers, and a plurality of piezoelectric actuators, a middle substrate includes a manifold, a plurality of restrictors, and a plurality of first dampers, and a lower substrate includes a plurality of nozzles. The middle substrate also includes a membrane that is formed under the manifold to mitigate a rapid pressure change in the manifold and if formed of a material different from the material used for forming the middle substrate. A cavity located under the membrane and at least one venting channel that connects the cavity to the outside are formed in the middle substrate or the lower substrate. Due to the above configuration, the membrane having flexibility mitigates a rapid pressure change in the manifold caused by backflow of ink, and thus, cross-talk between adjacent pressure chambers during ink ejection can be effectively prevented.
摘要:
A restrictor with a structure to prevent a back flow of ink and an inkjet head including the restrictor. In the inkjet head, an ink channel is formed in a channel plate, and the ink channel includes an ink inlet, a plurality of pressure chambers, a manifold, a plurality of restrictors respectively connecting the pressure chambers to the manifold, and a plurality of nozzles. Piezoelectric actuators are formed on the channel plate. Each of the restrictors includes a plurality of protrusions formed on an inner surface thereof in a structure suitable to increase a flow resistance of the restrictor when ink flows from the pressure chamber to the manifold through the restrictor. Each of the protrusions includes a first surface facing a flow of ink moving through the restrictor in a direction from the manifold to the pressure chamber, and a second surface facing a flow of ink moving through the restrictor in a direction from the pressure chamber to the manifold. The first surface has a low flow resistance, and the second surface has a high flow resistance. Therefore, a black flow of ink is restricted when ink is ejected, and sufficient ink can be supplied through the restrictor during an ink refill process.
摘要:
An OPC automation apparatus and manufacturing method of a semiconductor device using the same, being capable of improving the fabrication yield of a semiconductor device by establishing a system and an OPC automation apparatus in which an engineer computer and a work station are connected to one database such that all OPC tasks are monitored in the engineer computer and the OPC task is automatically performed. An OPC automation apparatus may include a first computer that receives a first OPC information from outside to store; and a second computer that receives the first OPC information from the first computer to perform an OPC process, generates a second OPC information from the result of the performance of an OPC process, and delivers the second OPC information to the first computer, wherein the second computer delivers the second OPC information to the first computer such that the first computer is able to compare and analyze the first OPC information with the second OPC information.
摘要:
A restrictor with a structure to prevent a back flow of ink and an inkjet head including the restrictor. In the inkjet head, an ink channel is formed in a channel plate, and the ink channel includes an ink inlet, a plurality of pressure chambers, a manifold, a plurality of restrictors respectively connecting the pressure chambers to the manifold, and a plurality of nozzles. Piezoelectric actuators are formed on the channel plate. Each of the restrictors includes a plurality of protrusions formed on an inner surface thereof in a structure suitable to increase a flow resistance of the restrictor when ink flows from the pressure chamber to the manifold through the restrictor. Each of the protrusions includes a first surface facing a flow of ink moving through the restrictor in a direction from the manifold to the pressure chamber, and a second surface facing a flow of ink moving through the restrictor in a direction from the pressure chamber to the manifold. The first surface has a low flow resistance, and the second surface has a high flow resistance. Therefore, a black flow of ink is restricted when ink is ejected, and sufficient ink can be supplied through the restrictor during an ink refill process.
摘要:
A method for generating driver assistance information of a traveling vehicle. The method can restructure traveling environments into an image based on a sensor system capable of removing blind spots around a traveling vehicle, and a scheme capable of exactly detecting a lane and a vehicle, and give a collision warning when there is a possibility of collision. Further, the method integrates recognition results of front/rear vehicles based on a lane recognition method applicable to various road environments, including the shape, curvature and loss of a lane, improves the stability of lane recognition, and distinguishes a solid line from a dot line, so it is possible to provide a driver with the subdivided degrees of danger. In addition, when a vehicle deviates from a lane, a voice warning may be output and the position of the vehicle for a road is restructured as an image.