Methods for Trimming Display Polarizers Using Lasers

摘要

A display such as a liquid crystal display has a display substrate that includes a layer of liquid crystal material sandwiched between a color filter layer and a thin-film-transistor layer. An oversized polarizer is laminated to the surface of the display substrate. Laser-based polarizer trimming equipment is used to trim away excess portions of the polarizer from the display substrate. A thickness gauge gathers thickness information from the laminated polarizer and display substrate. The thickness information is used to adjust the position of a laser relative to the polarizer during polarizer trimming operations. The laser beam moves along a cutting path that is unique to the display substrate. A vision system performs an inspection to determine whether the display substrate is damaged following polarizer trimming operations. Based on the inspection, laser parameters may be adjusted prior to performing polarizer trimming operations on additional polarizers and display substrates.

主权项

1. A method of trimming a layer of polarizer from a display substrate using a laser, comprising:
with a thickness gauge, measuring a distance between an upper surface of the layer of polarizer and a lower surface of the display substrate; adjusting a position of the laser relative to the layer of polarizer based on the distance; and with the laser, applying a laser beam to the layer of polarizer to trim away an excess edge portion of the layer of polarizer.