Abstract: A laser device includes a laser source which emits a laser beam, a scanner located on a path of the laser beam emitted from the laser source to control the path of the laser beam, a lens module located on a path of a controlled laser beam to converge the laser beam, and a lens adaptor connecting the lens module to the scanner. The lens module includes a first lens part which accommodates a first lens, a second lens part which accommodates a second lens, and a connecting part located between the first lens part and the second lens part, where the connecting part has a longest diameter greater than a longest diameter of the first lens part and a longest diameter of the second lens part.

Abstract: A suction unit control method includes simulating an air flow about a suction port, through which fumes generated when a laser beam is radiated on a target substrate on a stage unit to cut the target substrate are sucked up, installing an air blower on three or four sides around a laser cutting end at a height close to the suction port, controlling on and off of first to fourth solenoid valves of the air blower based on a movement of the stage unit while performing laser cutting on the target substrate while moving the stage unit.

Abstract: A robot arm is provided that includes: a first gripper having a first contact surface; a second gripper having a second contact surface corresponding to the first contact surface and an opening in the second contact surface; and a stopper including a pin protruding toward the first gripper. The stopper is configured to pass through the opening in the second gripper. As provided are a dummy removal system including the robot arm and a method of driving the dummy removal system to remove a polarization structure of a display panel.

Abstract: A contact inspection device includes a support; a contact inspection module including an inspection terminal which contacts and inspects an target; a crank module coupling the contact inspection module with the support and having a double crank structure; and a driving cylinder coupled to the support and the contact inspection module and moving the contact inspection module, where the driving cylinder applies a force to the contact inspection module to move, the force being oblique to the contact inspection module.

Abstract: A PWM control apparatus of a 2-stage inverter includes: a first inverter; a second inverter; and a PWM controller which PWM-controls the first inverter and the second inverter, respectively, wherein the PWM controller controls the first inverter by remote-state PWM (RSPWM), the PWM controller determines whether it is necessary to generate five edges in next PWM period in the RSPWM control of the first inverter, and if it is necessary to generate five edges, generates an edge in the beginning of the next PWM period and generates an edge according to a previously calculated setting value in the next PWM period.

Abstract: A work table for laser processing include a lower plate including a first area and a second area surrounding at least a portion of the first area, a first plate disposed in the first area on the lower plate and having a polygonal shape in a plan view, and a second plate disposed in the second area on the lower plate and movable in the second area.

Abstract: A dummy panel transport apparatus includes: an adsorption unit including an injection hole into which compressed air is injected, a discharge hole to which the compressed air is discharged, and a suction hole in which an external air is sucked; an adsorption unit holder supporting the adsorption unit, and movable in a first direction and a direction opposite to the first direction; a plate disposed under the adsorption unit holder; a plate holder supporting the plate, and movable in a second direction crossing the first direction and in a direction opposite to the second direction; a dummy storage part disposed under the plate; a brush unit disposed on the plate; and a brush unit holder supporting the brush unit, and movable in the first direction, in the direction opposite to the first direction, in the second direction, and the direction opposite to the second direction.

Abstract: An apparatus for enabling a two-stage inverter to switch between modes includes: a first inverter unit, a second inverter unit, a load connected between the first inverter unit and the second inverter unit, a mode switching unit connected between the load and the second inverter unit, and a control unit configured to drive the load in an one-stage inverter mode or a two-stage inverter mode by performing a control that turns on or off the mode switching unit.

Abstract: An apparatus for enabling an inverter to switch between modes includes: a first inverter unit; a second inverter unit; a load connected between the first inverter unit and the second inverter unit; a mode switching unit connected between the load and the second inverter unit; and a control unit configured to drive the load in a one-stage inverter mode or a two-stage inverter mode by performing control that turns on or off the mode switching unit. In particular, when an inverter switches between modes, the control unit performs mode switching in accordance with correct mode switching timing synchronization for PWM signal output.