Patent ID: 6246253
Filing Date: 2001-06-12
Classification: G02F

Abstract:
A system for testing a liquid crystal and an end seal of a liquid crystal cell comprising:a loading unit that a cassette enclosing the liquid crystal cells is loaded therein;a test unit for liquid crystal distribution disposed adjacent to the loading unit, wherein the liquid crystal is injected through a liquid crystal injecting hole, said test unit for liquid crystal comprising:a main frame;means for aligning the liquid crystal cell after being installed within the main frame, wherein the aligning means comprising:a hanger bracket installed at a side wall of the main frame;a first rack and a second rack opposed in parallel and supported movably at the hanger bracket in a horizontal way;a pinion engaging the first and second racks;a first slider and a second slider, wherein the first and second racks having respective ends are selectively fixed or movably connected to the first and second sliders, and an interval of said sliders becomes wider or narrower according to the moving direction of the first and the second racks;a third rack and a fourth rack movably supported by the first and second sliders in a horizontal way and installed up and down in parallel to dispose an orthogonal position with respect to the first and second racks;a pinion engaging the third and fourth racks;four putting arms, wherein the respective ends of the third and fourth racks are selectively fixed or movably connected to the putting arms, and intervals of said putting arms become wider or narrower according to the moving direction of the third and the fourth racks, and corners of the liquid crystal cell are laid on the four putting arms; andmeans for sensing attached to one among the putting arms, wherein the means for sensing controls the operation of the robot unit by sensing the liquid crystal cell;a means for emitting light toward a bottom of the liquid crystal cell being aligned by the aligning means and showing the liquid crystal distribution to an investigator by reflecting light;a test unit for end seal disposed adjacent to the loading unit, wherein the end seal seals the liquid crystal injecting hole;unloading units of good, repair, reject for unloading the liquid crystal cell disposed with a selected distance from the test unit for liquid crystal, wherein the liquid crystal cell is selectively unloaded according to a result from the respective test units;a robot unit for selectively transferring the liquid crystal cell to the respective units; andan operating panel disposed between the test units, wherein the operating panel comprises switches for deciding a transferring position of the liquid crystal cell depending on the test results.