Glass centering apparatus for flat pannel display

Abstract

The invention relates to a examining apparatus of a flat panel display device, especially a glass center-determinating device of the flat panel display device for accurate glass center determinating not influenced by the exterior environment in a mechanical way, which comprises: a work table with a fixing head at one side for determining the center to the transformed glass, a moving head moves inthe whole directions of the glass after the glass is attached to the fixing head; a moving head drive portion for driving the respective moving head; a moving distance examining device for examining the accurate moving distance of the moving head drived by the moving head drive portion and outputting the examining signals; and a controller for controlling the whole glass center-determinating device, receiving the examining signals output from the distance examining device, counting the glass specification information, and judging the glass size error based on the specification information andoutputting.

Description

technical field [0001] The present invention relates to an inspection device of a flat panel display device, in particular to a process of centering a main glass (main glass) of a flat panel display device through a mechanical centering technique that can be performed without being affected by the external environment Precision glass centering glass centering device for flat panel display panels. Background technique [0002] With the continuous development of flat panel display (FPD: Flat Panel Display) technology, the size of the flat panel display is gradually increasing, and at the same time, the plain glass of the flat panel display is also becoming larger. [0003] In the manufacture of such large glasses, in addition to increasing the size, it was necessary to increase the precision at the same time. In the manufacture of this kind of glass, the improvement of centering accuracy has a very close influence on the reduction of process defects and the improvement of the...

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Problems solved by technology

[0005] However, this method and the like have disadvantages such as large errors due to differences in the measurement space and lighting environment.

In addition, in the method using image processing technology using a camera, if no alignment mark is displayed at a predetermined position on the glass, centering cannot be performed. Therefore, an alignment mark display process must be added separately, and there are also the following disadvantages. That is, there are errors due to differences in the brightness of the lighting, and the time taken for centering becomes longer, making it difficult to perform precise centering

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