Abstract: A memory test device for testing a memory device is provided. The memory test device includes a sequencer configured to output first and second sequencer outputs that are different from each other in response to a sequencer input. A first pattern generator is configured to output a first test pattern according to the first sequencer output. A second pattern generator is configured to output a second test pattern according to the second sequencer output. A selector is coupled to the first and second pattern generators and configured to output write data according to the first test pattern and the second test pattern.

Abstract: A robot cleaner may include a main body; a traveling assembly moving the main body; a cleaning tool assembly installed in the lower part of the main body, and contacting a floor to clean the floor; a water-feeding unit supplying water to the cleaning tool assembly; and a capacitance measurer contacting the cleaning tool assembly, and measuring capacitance of the cleaning tool assembly in order to calculate an amount of water of the cleaning tool assembly. Accordingly, by measuring an amount of water of a cleaning tool installed in a robot cleaner based on capacitance, it is possible to accurately measure an amount of water absorbed in a cleaning tool.

Abstract: A robot cleaner having a static-charge removal device to prevent deterioration in performance or damage to an interior circuit of the cleaner due to static charge. The robot cleaner includes a conductive trap member to trap frictional static charge, a discharge member electrically connected to the trap member to discharge the static charge, trapped by the trap member, into another kind of energy, for example, light, sound, or kinetic energy, and a ground member located on the robot cleaner while being connected to the discharge member. The robot cleaner prevents adherence of dust, loose debris, etc. as well as damage to an interior circuit thereof due to static charge, thereby efficiently performing a cleaning operation.

Abstract: In a cleaning system, dust stored in a dust box is suspended in air introduced into the dust box through a first opening formed through a robot cleaner, and is then discharged to a second opening formed through a maintenance station through the first opening of the robot cleaner.

Abstract: A blade assembly of an autonomous cleaning device. The blade assembly includes a blade having a first part fixed to the main body and a second part extended from the first part toward a floor and a support member having at least a portion disposed adjacent to the second part of the blade to restrict movement of the second part of the blade to within a predetermined range.

Abstract: A robot cleaner enables a wet cleaning, has a replaceable cleaning unit, and ensures a sufficient friction force for doing a wet cleaning of a floor. The robot cleaner includes a frame including a wheel for driving, a replaceable cleaning unit formed at a lower part of the frame to clean a bottom surface and disposed in front of the wheel, a tank disposed at an upper part of the wheel and configured to supply fluid to the cleaning unit, a pump configured to pump the fluid contained in the tank such that the fluid contained in the tank is supplied to the cleaning unit, a hose configured to extend to the pump and the upper part of the cleaning unit and through which the fluid pumped by the pump flows, and a bumper formed on a side of the frame.

Abstract: A maintenance system and a cleaning system having the same, the maintenance system including a maintenance station provided at indoors to mount a robot cleaner having a first dust container thereon, a suction port to suck dust of the first dust container, and a dust removing apparatus connected to the suction port while being disposed at outdoors, so that the cleaning performance is maintained regardless of existence of dust in the dust container of the robot cleaner while enhancing the spatial efficiency at indoors.

Abstract: A cleaning system includes a robot cleaner having an opening unit and a first dirt container funneled to the opening unit, and a maintenance station to which robot cleaner is docked to discharge dirt stored in the first dirt container The maintenance station includes a first inlet hole configured to intake dirt from the first dirt container through the opening unit, a first outlet hole configured to blow air into the first dirt container, a circulating passage provided between the first inlet hole and the first outlet hole, a second dirt container disposed on the circulation passage to store dirt taken in from the robot cleaner, a draft apparatus having a draft fan and a fan motor to drive the draft fan to circulate air through the circulating passage, and a second outlet hole configured to discharge air inside the circulating passage of the maintenance station to an outside.

Abstract: An autonomous cleaning apparatus including a body, a brush unit which is rotatably installed onto the body to collect dust from a bottom of the body, and a brush cleaning member including a first brush cleaning protrusion and a second brush cleaning protrusion that protrude toward the brush unit to make contact with the brush unit to remove foreign substances wound around the brush unit.

Abstract: A driving wheel assembly and a robot cleaner having the same includes a main body and a driving wheel assembly including a driving wheel, a housing, a driving motor, a rotary member with rotation around a rotation shaft of the driving motor, where the rotary member includes a first unit and a second unit disposed at a position opposite to the driving wheel with respect to the rotation shaft of the driving motor, and a compression coil spring disposed between the housing and the second unit to apply pressure to the second unit, where a distance between a contact point where the compression coil spring and the second unit contact and the rotation shaft of the driving motor is shorter than a distance between a rotation shaft of the driving wheel and a rotation shaft of the driving motor.

Abstract: An autonomous cleaner has an enhanced structure capable of conducting an efficient cleaning task according to the material quality or the condition of the floor surface of a cleaning space. The autonomous cleaner includes a body, a driving wheel to drive the body, a driving wheel assembly having the driving wheel, and a control unit. The control unit detects a displacement of the driving wheel corresponding to a reference position by sensing a sensor target, determines material quality or condition of a floor surface according to the displacement of the driving wheel, and controls the driving of the autonomous cleaner according to the determined material quality or the condition of the floor surface.

Abstract: A robot cleaner having an improved structure which executes a cleaning operation without stoppage of travelling of the robot cleaner due to obstacles present in a space to be cleaned, and a control method thereof. The control method of the robot cleaner which is provided with a main body, driving wheels driving the main body, and driving wheel assemblies, each of which includes each driving wheel, includes detecting displacement of each driving wheel with respect to a reference position by sensing a sensed body provided on each driving wheel assembly, judging whether or not the displacement is within a predetermined reference range, and changing a travelling path of the main body, upon judging that the displacement deviates from the reference range.

Abstract: A step climbing device for moving robots including a climbing guide provided with an inclined surface formed on the upper surface thereof so as to allow a moving robot to climb a step through the inclined surface of the climbing guide.

Abstract: A blade assembly of an autonomous cleaning device. The blade assembly includes a blade having a first part fixed to the main body and a second part extended from the first part toward a floor and a support member having at least a portion disposed adjacent to the second part of the blade to restrict movement of the second part of the blade to within a predetermined range.

Abstract: A robot cleaner provided with a shutter to open or close an inlet of a dust box when the dust box is separated from a body of the robot cleaner. Another robot cleaner, which docks with an automatic exhaust station, is also disclosed, together with the automatic exhaust station. The latter robot cleaner includes a shutter to be automatically opened by air discharged from the automatic exhaust station in a docked state of the robot cleaner to exhaust dust from the dust box, in order to allow even heavy dust to be easily exhausted.

Abstract: A blade assembly of an autonomous cleaning device. The blade assembly includes a blade having a first part fixed to the main body and a second part extended from the first part toward a floor and a support member having at least a portion disposed adjacent to the second part of the blade to restrict movement of the second part of the blade to within a predetermined range.

Abstract: A robot cleaner having a static-charge removal device to prevent deterioration in performance or damage to an interior circuit of the cleaner due to static charge. The robot cleaner includes a conductive trap member to trap frictional static charge, a discharge member electrically connected to the trap member to discharge the static charge, trapped by the trap member, into another kind of energy, for example, light, sound, or kinetic energy, and a ground member located on the robot cleaner while being connected to the discharge member. The robot cleaner prevents adherence of dust, loose debris, etc. as well as damage to an interior circuit thereof due to static charge, thereby efficiently performing a cleaning operation.

Abstract: In a cleaning system, dust stored in a dust box is suspended in air introduced into the dust box through a first opening formed through a robot cleaner, and is then discharged to a second opening formed through a maintenance station through the first opening of the robot cleaner.

Abstract: In a cleaning system, dust stored in a dust box is suspended in air introduced into the dust box through a first opening formed through a robot cleaner, and is then discharged to a second opening formed through a maintenance station through the first opening of the robot cleaner.

Abstract: In a cleaning system, dust stored in a dust box is suspended in air introduced into the dust box through a first opening formed through a robot cleaner, and is then discharged to a second opening formed through a maintenance station through the first opening of the robot cleaner.