Alignment film printing device

摘要

An alignment film printing device, configured to improve coating quality of an alignment film, includes at least one printing unit, and the printing unit each includes: a cylinder body with an opening at a bottom and an extract opening on a top; a vacuum extractor connected with the extract opening; a plunger provided inside the cylinder body, and configured to draw the alignment fluid from the opening to the cylinder body; a vacuum tester provided at the extract opening and configured to monitor a vacuum degree inside the cylinder body and above the plunger; a range finder provided inside the cylinder body and configured to monitor a distance from the plunger to a top of the cylinder body; and a control device in signal communication with the vacuum extractor, the vacuum tester and the range finder respectively and configured to control a volume of the alignment fluid drawn into the cylinder body according to test values of the vacuum tester and the range finder.

主权项

1. An alignment film printing device for applying alignment film on a substrate, comprising at least one printing unit, and the printing unit each comprising:
a cylinder body, with an opening at a bottom and an extract opening provided on a top of the cylinder body; a vacuum extractor, connected with the extract opening; a plunger, provided inside the cylinder body and configured to draw an alignment fluid from the opening to the cylinder body; a vacuum tester, provided at the extract opening and configured to monitor a vacuum degree inside the cylinder body and above the plunger; a range finder, provided inside the cylinder body and configured to monitor a distance from the plunger to the top of the cylinder body; and a control device, in signal communication with the vacuum extractor, the vacuum tester and the range finder respectively and configured to control a volume of the alignment fluid drawn into the cylinder body according to test values of the vacuum tester and the range finder.