Liquid Crystal Panel Detection Device

Abstract

The present invention provides a compact liquid crystal panel detection device which can determine a defect address rapidly and accurately. The detection device comprises a first polarizing film and a second polarizing film which are arranged at the upper and lower parts of a liquid crystal panel on a workbench respectively; a backlight unit which irradiates the liquid crystal panel at a right angle with the lower surface, from the lower surface of the liquid crystal panel on the workbench, and via the second polarizing film; an inclined illumination light source which irradiates the liquid crystal panel on the workbench aslant from the lower part of the lower surface; a probe unit for applying voltages on the pixels of the liquid crystal panel on the workbench to detect the bright spots of the liquid crystal panel; a camera head for shooting the upper surface of the liquid crystal panel under the state of selectively receiving any one of the irradiation light coming from the backlight unit and the inclined irradiation light coming from the inclined illumination light source, and via the first polarizing film; and a reflecting part for guiding the inclined illumination light to the lower surface of the liquid crystal panel in a manner that the inclined illumination light is irradiated to the liquid crystal panel at an appropriate incident angle.

Description

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AI Technical Summary

Benefits of technology

This technology allows for quicker and more efficient detection of defects during manufacturing processes by performing multiple tests at different stages simultaneously or sequentially while also allowing for precise positional control over each test area. By utilizing an optically transparent plate called polarization film that absorbs certain wavelengths of visible light when exposed to ultraviolet rays (UV), this technique makes it possible to inspect both dark areas and clear surfaces accurately even after they have been covered up by other layers such as paint coatings or plating films. Additionally, there are several technical features associated with these techniques:

Problems solved by technology

This technical problem addressed in these prior art techniques relating to inspecting display panels involves the use of multiple lights sources and cameras to capture images while avoiding interference issues associated with ambient light conditions. Additionally, the current method requires separate mountings for both the light source and camera components, leading to bulky size and increased costs.

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