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US 2004/0163449 A1Published application
Apparatus and method for testing liquid crystal display panel
AssigneeLG.Philips LCD Co., Ltd.
InventorsJi-Heum Uh, Sang-Sun Shin
Life of this patent
Estimating the term…
Abstract
An apparatus and a method testing liquid crystal display panel which are able to test whether or not burr remains on longer sides and on shorter sides of a unit liquid crystal display panel using first to fourth testing bars in a touch method, and able to measure a distance between the longer sides and a distance between the shorter sides of the unit liquid crystal display panel.
Claims23
An apparatus for testing a liquid crystal display panel, comprising:
- first and second testing bars corresponding to longer sides of a unit liquid crystal display panel testing for defect along a grinding edge of the unit liquid crystal display panel and measuring a distance between the longer sides of the unit liquid crystal display panel;
- and
- third and fourth testing bars corresponding to shorter sides of a unit liquid crystal display panel testing for defect along a grinding edge of the unit liquid crystal display panel and measuring a distance between the shorter sides of the unit liquid crystal display panel.
A method for testing a liquid crystal display panel, comprising:
- loading a unit liquid crystal display panel on a first table including first, second, third and fourth testing bars;
- and
- measuring a distance between the longer sides of the unit liquid crystal display panel while operating the first and second testing bars and a distance between the shorter sides of the unit liquid crystal display panel while operating the third and fourth testing bars.
A method for testing a liquid crystal display panel, comprising:
- loading a unit liquid crystal display panel on a first table including first and second testing bars;
- and
- testing for defect on opposite sides of the unit liquid crystal display panel using the first and second testing bars and at the same time measuring a distance of at least one side of the unit liquid crystal display panel.
Dependencies are inferred from the claim text.