Patent ID: 8067057

Claim:
A method for controlling a gap between a nozzle and a substrate using a dispenser for a liquid crystal display panel, comprising: loading a substrate onto a metallic table; lowering a body with a syringe mounted therein using a vertical driving stepping motor; detecting whether a nozzle of the syringe is in contact with the substrate using a first sensor, wherein the first sensor is a magnetic sensor; sending an electric signal from the first sensor to a control unit, wherein the electric signal changes as the body is lowered by the vertical driving stepping motor toward the table; recognizing an absence of change in the electric signal by the control unit as the nozzle being in contact with the substrate; raising the body; detecting a gap distance between the nozzle and the substrate using a second sensor; and controlling the vertical driving stepping motor so that a desired gap distance is obtained between the nozzle and the substrate.