Methods and Equipment for Trimming Polarizers in Displays

摘要

An electronic device is provided with a display such as a liquid crystal display mounted in an electronic device housing. The display includes a glass display layer such as a glass color filter substrate. A polarizer layer is formed on the glass display layer. To ensure that the peripheral edge of the polarizer layer matches the peripheral edge of the glass display layer, a laser beam scanning system is used to trim edge portions of the polarizer layer that overhang the glass display layer. The laser beam scanning system includes a moving laser beam that makes multiple scans along the edge of the polarizer layer. To prevent damage to the glass display layer during trimming operations, a characteristic of the moving laser is modified in between successive scans such that the energy density of the laser cut is reduced as the laser beam approaches the surface of the glass.

主权项

1. A method of trimming a polarizer layer on a glass layer, comprising:
making a first laser light cut with a first energy density along an edge of the polarizer layer; and after making the first laser light cut, making a second laser light cut with a second energy density that is less than the first energy density along the edge of the polarizer layer.