Surface inspection device

Abstract

The invention provides a surface detection device used for surface detection of devices on a display panel. The surface detection device comprises an ultrasound transduction detection unit and a processing unit, wherein the ultrasound transduction detection unit is used for sending ultrasound waves to a surface to be detected and obtaining feedback signals fed back by the ultrasound waves after the ultrasound waves reach the surface to be detected, and the processing unit is used for calculating the location of the surface to be detected according to the feedback signals. The surface detection device can be used for precisely detecting shock insulators and monitoring residual quantity of liquid crystal.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a surface detection device for surface detection of devices on a display panel. Background technique [0002] With the development of technology, liquid crystal displays have been frequently used in various devices. Currently, a liquid crystal display is a common flat panel display, and a Thin Film Transistor-Liquid Crystal Display (TFT-LCD for short) is a mainstream product in the liquid crystal display. TFT-LCD generally includes an array substrate and a color filter substrate arranged in opposite cells, and a liquid crystal layer is filled between the array substrate and the color filter substrate. [0003] In the manufacturing process of liquid crystal displays, it is often necessary to measure the surface of objects in the process to ensure the accuracy of the manufacturing process. [0004] For example, in a liquid crystal display, a spacer is provided between the array ...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the height detection of the spacer usually uses a charge-coupled device CCD lens to measure the gray level difference, which has the disadvantages of insufficient detection accuracy and slow detection speed; and the internal structure and elasticity of the spacer The modulus cannot be detected through the CCD lens; while the existing technology measures and monitors the amount of liquid crystal in the liquid crystal bottle, it uses a sensor to perform residual correction, and it is set to occur when a certain amount of liquid crystal remains in the liquid crystal bottle, such as 20g. In this way, the use of each liquid crystal bottle requires a predetermined amount of liquid crystal remaining, resulting in a large amount of waste of liquid crystal

[0007] Therefore, in the manufacturing process of liquid crystal displays, there is a lack of a detection device that can be used universally for the surface state, and can accurately obtain the height and surface state of the measured object, such as accurately detecting the height and surface profile of the spacer, and accurately Detect the height of the remaining liquid crystal in the liquid crystal bottle, etc.

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