Polarizing Plate Attachment Alignment Accuracy

The patent applies preliminary action by measuring and determining the alignment axis of the liquid crystal display panel before attaching the polarizing plate. The alignment axis measurement unit measures the alignment axis, and based on this measurement result, the attachment position is determined and the polarizing plate is attached at the determined position. This preliminary measurement and determination step ensures accurate alignment between the liquid crystal alignment axes and polarizing plate transmission axes, achieving high contrast ratio while maintaining a relatively simple manufacturing process.

The patent merges multiple functions into an integrated attachment device. The device combines the alignment axis measurement unit, the attachment position determination unit, and the polarizing plate attachment unit into a single integrated system. This merging of functions allows the device to perform alignment inspection and rotation control without requiring separate complex equipment, thereby improving alignment precision while keeping the overall device complexity manageable.

The patent replaces complex mechanical alignment systems with an optical measurement and computational determination system. The alignment axis measurement unit uses optical methods to measure the alignment axis, and the attachment position determination unit calculates the optimal attachment position based on measurement results. This substitution of mechanical systems with optical and computational methods achieves precise alignment while reducing manufacturing cycle time, as optical measurement and computational calculation are faster than traditional mechanical alignment procedures.