Device and method for detecting in-plane defects of liquid crystal panel

Abstract

The invention belongs to the field of liquid crystal panels and provides a device for detecting in-plane defects of a liquid crystal panel. The device comprises a work bench used for placing the liquid crystal panel and pressurizing equipment suspended over the work bench, wherein the pressurizing equipment can uniformly pressurize the whole liquid crystal area of the liquid crystal panel to makethe liquid crystal panel generate an allowable deformation and can protect the liquid crystal panel against damages in the process of pressurizing. The invention also provides a method for detecting the in-plane defects of the liquid crystal panel, which comprises the following steps: before the liquid crystal panel is machined and assembled into a module, uniformly pressurizing the liquid crystal area of the liquid crystal panel by the pressurizing equipment to make the liquid crystal panel generate allowable deformation; then electrifying the pressurized liquid crystal panel to detect whether an abnormal bright line or a dark line appears in the liquid crystal area of the liquid crystal panel; if the bright line or the dark line appears, determining that the position of deformation has defects and the liquid crystal panel is unqualified; and if the bright line or the dark line does not appear, determining that the position of deformation has no defects and the liquid crystal panel is qualified. The detection method can effectively detect the in-plane defects of the liquid crystal panel.

Description

technical field [0001] The invention belongs to the field of liquid crystal panels, and in particular relates to a detection device and a detection method for in-plane defects of a liquid crystal panel. Background technique [0002] The liquid crystal panel is mainly composed of upper and lower glass substrates, upper and lower polarizers and a plastic frame. The plastic frame supports the upper and lower glass substrates. Between the upper and lower glass substrates is a liquid crystal layer. The liquid crystal layer is composed of liquid crystal molecules and spacers. The in-plane defects of the liquid crystal panel It is mainly caused by foreign matter in the liquid crystal layer. At present, in the liquid crystal industry, the detection of in-plane defects of the liquid crystal panel is mainly completed by manually pressing the liquid crystal panel at the back of the module. This detection method is very inefficient and has the following disadvantages: [0003] (1) Sinc...

AI Technical Summary

Problems solved by technology

[0003] (1) Since the surface of the liquid crystal panel is easily polluted by manual pressing, and the force on the liquid crystal panel is uneven, it is very easy to cause damage to the internal structure of the liquid crystal panel, and may also cause failures such as missed inspections;

[0004] (2) Manually press the liquid crystal panel in the latter part of the process of the entire module. The liquid crystal panel has been processed and assembled. The defects in the liquid crystal panel can only be detected and cannot be intercepted in advance. When the defects in the liquid crystal panel are detected, the entire liquid crystal panel All have to be scrapped, and the previous processing and assembly procedures are in vain, which is very uneconomical;

[0005] (3) The object to be tested by manually pressing the LCD panel is the entire module, not the empty LCD panel. Since the LCD panel has been assembled, it is very inconvenient to press, and it can only be pressed on one side, and can not be pressed on both sides. The detection of the module Incomplete

Images