Laser welding apparatus and method of controlling the same

A laser welding apparatus comprising:

• a stage on which a first structure and a second structure are seated, the first structure and the second structure are targets of a laser welding process;
• a vision camera located above the stage and configured to obtain a sample image displaying a welding target region in which the first structure and the second structure come into contact;
• a controller configured to adjust setting parameters of the vision camera, and
• a welding part configured to irradiate a laser to the welding target region,
• wherein the controller obtains a sample RGB value from each of a plurality of regions of interest selected from the sample image, compares the sample RGB value with a reference RGB value obtained from each of a plurality of reference regions of interest defined in the same locations as the plurality of regions of interest in a predetermined reference image, adjusts at least one of the setting parameters, and sets the vision camera,
• wherein, when a difference between the sample RGB value and the reference RGB value is greater than a reference difference, the controller adjusts the at least one of the setting parameters by selecting one of a plurality of pre-stored setting values;
• wherein the plurality of setting values are applied to the pre-stored setting parameters in descending order according to the number of times each of the plurality of pre-stored setting values has been previously applied;
• and
• wherein the controller determines the welding target region from a result image obtained by the vision camera, and controls the welding part such that the laser is irradiated to the welding target region.