Apparatus for testing liquid crystal display panel
View Patent ↗An apparatus for testing a liquid crystal display (LCD) panel which is capable of easily attaching or detaching a large polarizer to/from a test board when testing a large LCD panel, the apparatus comprising a test board for outputting light to an LCD panel which is placed thereon, a polarizer fixing unit rotatably formed at the test board and having a groove in which a polarizer is inserted, and a stop formed at the test board to fix the polarizer fixing unit to a desired position.
1. A method of fabricating a liquid crystal display (LCD) panel, the method comprising:
preparing a first and a second substrate;
providing a switching device array on the first substrate;
providing a color filter substrate on the second substrate;
bonding the first and second substrate together;
forming a liquid crystal layer between the substrates;
cutting the attached substrates into a plurality of unit LCD panels;
performing a visual inspection of a unit LCD panel of the plurality of unit LCD panels using a visual inspection apparatus comprising:
a test board to transmit light to a unit LCD panel disposed thereon;
a polarizer fixing unit rotatably formed at the test board and having a groove into which a polarizer is insertable; and
a stop formed at the test board to fix the polarizer fixing unit at a predetermined position,
the polarizer fixing unit is rotatable to position the groove substantially perpendicular to a ground.
2. The method of claim 1 , wherein the visual inspection apparatus further comprises a fixing member installed at one of the polarizer fixing unit and the stop to fix the polarizer fixing unit.
3. The method of claim 2 , wherein the fixing member includes a magnet.
4. The method of claim 1 , wherein the visual inspection apparatus further comprises a camera disposed at an upper portion of the test board to capture the LCD panel to determine an aligned state of the LCD panel.
5. The method of claim 1 , wherein the visual inspection apparatus further comprises a jig insertable into the polarizing fixing unit to support the polarizer.
6. The method of claim 1 , wherein the visual inspection apparatus further comprises a rotational shaft to rotate the polarizer fixing unit.
7. The method of claim 1 , wherein performing the visual inspection of a unit LCD panel includes:
disposing the unit LCD panel on the test board; and
positioning the polarizer on the unit LCD panel.
8. The method of claim 7 , wherein positioning the polarizer on the unit LCD panel includes:
inserting the polarizer into the groove of the polarizing fixing unit; and
rotating the polarizing fixing unit to the predetermine position.
9. The method of claim 8 , wherein aligning the unit LCD panel on the testboard includes capturing an image of the unit LCD panel using the camera.
10. The method of claim 7 , wherein positioning the polarizer on the unit LCD panel includes aligning the unit LCD panel on the testboard.
11. The method of claim 1 , wherein performing the visual inspection of a unit LCD panel includes:
transmitting light through the unit LCD panel from the testboard;
detecting light transmitted through the unit LCD panel and the polarizer.