Patent KR-20110001795-U (KR)
IPC: G02F1/13
Filed: 2009-08-17
Abstract: A LCD bare glass inspection system comprises a anlignment portion ①, an inspection portion ②, and a Good & N/G - Up/Down Transport portion ③, Good Transport portion④, and Expected NG -Transport Zone⑤, Re-Inspection - Up/Down Transport Zone⑥, Re-Inspection Zon ⑦, Finial NG -Transport Zone⑧ .  An inspection system ② for LCD bare glass is located in the second portion and the inspection system ② is connected to an alignment portion ①, via an operating on/off switch  in the end cover of an inspection system ②. The operating on/off switch is operated automatically by sensor of the end cover. The illumination under LCD glass transmitted light and the illumination over LCD glass reflectted light  for the defect image are captured in camera from two pair of  illumination, such that image processed from the image graber the personal computer and image processing algorithms. The anlignment portion ①, is at least as wide as the LCD glass so as to inspect the defect on LCD glass and align  of LCD glass during moving of the LCD glass and inspecting a defects view of the LCD glass②after then the LCD glass is moved to a Good & N/G - Up/Down Transport portion ③. This portion is move of LCD glass to correct loading position according to the LCD glass size at once. If the inspection result is good, then the LCD glass is transported to Good  Transport portion④,straghtly on the air moving convyor, On the contrary, the inspection result is bad, then the LCD glass is transported to expected NG -transport zone⑤ straghtly on the air moving convyor,the LCD glass is inspected to the re-inspection zon ⑦automatically after the LCD glass move to pass the re-inspection  up/down transport zone⑥,through the repair inspection equipment. And the inspection result is bad the the LCD glass is transported to finial NG -transport zone⑧,after then the LCD glass is stocked in N/G buffer. On the contrary, if the defect of LCD glass is repair, then the defect LCD glass is repaired and stocked in good buffer. In this patent, we propose a new image processing technique that reliably detects the various defects of LCD bare glass. The image of LCD bare glass is acquisited from reflected LED beam First, we apply the morphological image processing technique to remove the background noise. Next, we use the 2th theshold algorithm adaptive filtering and statistical characteristics to detect the stain and whites defects. Performance of the proposed method is evaluated on real LCD bare glass samples.In this patent, the intelligent vision system for an effective and intelligent path-planning of an inspection system system based on full automatic system is proposed. The depth information and disparity map are detected in the inputting images of line scan camera. The distance between the magneitc roll.  In this patent, we propose a minute  defect signal detection 2th algorithm for a development of dark field and light field methods, using the  scattering method of LED illumination with multi lighting, that can measure various dfects(stain,white,black,pinhole, 
     dent,etc) in real-time. The LED lighting of even and odd  can detect minute signals to use of switching methods those show and lay-scattering characteristic of each defect point for LCD bare glass. In the proposed method, a corresponding defect data of each stain,white,black,pinhole, 
     dent,etc can be separated by an external trigger and threshold values in the captured continuous image signals of line scan camera it achieved a 95 percent success rate on the production of LCD bare glass. 
     
     LCD bare glass inspection,PDP inspection,PDP front inspection