Patent ID: 8899175
Filing Date: 2014-12-02
Classification: G02F

Abstract:
1. A liquid crystal material dispensing apparatus, comprising: a spacer height measuring unit for measuring a height of a spacer on a substrate; and a liquid crystal material dispensing system configured to dispense liquid crystal material onto the substrate and compensate an initial amount of the liquid crystal material dispensed on the substrate; and a control unit in the liquid crystal material dispensing system arranged to determine a dispensing pattern of the liquid crystal material in a dumbbell shape onto the substrate based upon the measured spacer height, a shape of the substrate, viscosity of the liquid crystal material, and operational modes of the liquid crystal display device, and to compensate the liquid crystal material at a center portion of the dispensing pattern of the dumbbell shape, wherein the liquid crystal dispensing system includes: a liquid crystal material dispensing device for dispensing the liquid crystal material through a nozzle onto the substrate and for controlling an amount of the liquid crystal material dispensed in accordance with movement of a needle along upward and downward directions by a magnetic force from a solenoid coil and tension of a spring to open and close a discharging hole connected to the nozzle, the liquid crystal material dispensing device including a magnetic bar above the needle and a gap controlling unit connected to the magnetic bar to move the magnetic bar in upper and lower directions when the magnetic force is not activated by the magnetic bar, thereby the distance between the magnetic bar and the needle is controlled in case where the discharging hole is closed by the needle in order to control the movement range of the needle when the magnetic force is activated; a power supply for providing electric power to the solenoid coil; and a gas supply for providing pressurized gas to the liquid crystal material dispensing device, wherein the electric power supply and the gas supply are controlled by the control unit to dispense a predetermined amount of the liquid crystal material onto the substrate, wherein the spacer height measuring unit is formed integrally with the liquid crystal material dispensing device.