Liquid crystal glass substrate 45° angle inspection method

Abstract

The invention discloses a 45° angle inspection method for a liquid crystal glass substrate, which includes the following inspection steps: first, placing the glass substrate to be inspected on an adjustable inspection device in a darkroom inspection space; second, turning on the halogen lamp , adjust the scale of the halogen light box to the MAX illuminance value, and inspect the glass substrate; the third step, adjust the halogen lamp so that the halogen light and the glass substrate are irradiated at an angle of 45°, at 100-200mm above the glass substrate, the quality inspector The human eye observes vertically from the glass substrate; the fourth step is to move the halogen light source, scan the glass substrate line by line, and find out the position of the defect. Through the 45° angle inspection method of the present invention, the position of the surface defect of the glass substrate can be quickly found and judged, which improves the accuracy of detection and judgment of the surface defect of the glass substrate, ensures the internal and surface quality of the glass substrate, and improves work efficiency .

Description

technical field [0001] The invention relates to a 45° angle inspection method for a liquid crystal glass substrate, in particular to a method for inspecting a glass surface by light refraction, and belongs to the technical field of glass surface defect inspection. Background technique [0002] Float architectural glass is generally detected by online detection equipment. Its working principle is: the photographic equipment is electrically connected to the display screen, and the light box that illuminates the light box produces a specific pattern of light that shines on the float glass. The image on the float glass, the display screen displays the image taken by the photographic equipment, if there is a defect on the float glass, the image of a specific pattern formed by irradiation on the float glass will be deformed or blurred at the defect Unclear, the impact captured by the photographic equipment is displayed on the display screen, and the deformation or blurring of the ...

AI Technical Summary

Problems solved by technology

[0003] TFT (the English abbreviation of Thin Film Field Effect Transistor ThinFilmTransistor) means that each liquid crystal pixel on the liquid crystal display is driven by a thin film transistor integrated behind it. For the TFT glass substrate, in addition to detecting the glass In addition to internal defects, users pay more attention to the surface quality of glass substrates, so they put forward higher requirements for the surface inspection of glass substrates. The existing float glass inspection methods cannot effectively inspect the surface of float glass.

[0004] For the detection of the existing float glass, the float glass is directly transmitted through the halogen lamp and detected with the naked eye, and the detection is carried out by the observer's own experience, because if the strong light emitted by the halogen lamp is directly observed through the light, the eye The field of vision is full of strong light sources from halogen lamps; when people observe the reflected light from the front, the effect and principle are similar: directing a strong flashlight to the eyes will not only fail to observe surface defects, but will also cause damage to the eyes

[0005] Therefore, this empirical detection method is often unable to accurately and quickly find out the location of the defect according to each person's inspection method and personal judgment ability, and cannot directly observe and detect the surface of the glass substrate accurately and efficiently. It affects the surface quality of the glass substrate to a large extent, thus affecting the quality of the entire glass production line

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