Patent Number: 8,876,248

Title: Detecting method for printing material boundary of large UV inkjet printer

Abstract: A detecting method for printing material boundary of a large UV inkjet printer includes steps of performing a full-field scanning process at a first scanning speed by a photosensitive element disposed on an inkjet module to cause a sensing device to produce induced voltage signals corresponding to different positions below sequentially in order to determine rough coordinate positions of two opposite sides of the printing material based on the changes of the induced voltage signals, and to define detailed scanning areas including the rough coordinate positions of the two opposite sides; and performing a detailed scanning process for the detailed scanning areas along an opposite direction at a second scanning speed slower than the first scanning speed by the photosensitive element in order to obtain boundary coordinate positions of the two opposite sides of the printing material based on the changes of the induced voltage signals.

Inventors: Huang; Chih-Chiang (New Taipei, TW), Yen; Chi-Hua (New Taipei, TW), Shih; Liang (New Taipei, TW)

Assignee: Great Computer Corporation

International Classification: B41J 29/393 (20060101)

Expiration Date: 2019-11-04 0:00:00