Electro-optic modulator assembly for contactless test of flat panel display, method for contactless test of flat panel display using the same, method for manufacturing flat panel display using the method for contactless test of flat panel display, and related technologies
AssigneeLG Electronics Inc.
InventorsSung Hoon Kim, Dae Hwa Jeong, Bong Gyu Rho
Life of this patent
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Abstract
Disclosed is an electro-optic modulator assembly capable of determining whether each process is being carried out normally during a fabricating process of a flat panel display by performing a contactless testing across the flat panel display, an apparatus and a method for contactless test of flat panel display using the electro-optic modulator assembly, and a method for manufacturing a flat panel display using the method for contactless test of the flat panel display.
Claims20
An electro-optic modulator assembly for contactless testing of a flat panel display comprising:
- an upper glass plate;
- a conductive layer coated on an entire surface of the upper glass plate;
- a lower glass plate arranged between the flat panel display and the surface of the conductive layer that is coated with the conductive layer;
- a sealing material that is positioned between the upper glass plate and the lower glass plate and defining a void therebetween, an external wall surface of the sealing material being aligned along an axis that extends along a lateral surface of the upper glass plate;
- a modulation layer including of electro-optic material and positioned in the void defined by the upper glass plate, the lower glass plate and the sealing material;
- and
- a conductive material continuously coated along the lateral surface of the upper glass plate, a lateral surface of the conductive layer and a lateral surface of the sealing material.
A method employed in testing a flat panel display that is configured to use a method of contactless testing of a flat panel display, the method comprising:
- forming a conductive layer coated on a surface of a glass plate;
- forming a sealing material that contacts with the glass plate, the sealing material defining a void for forming a modulator;
- forming an electrode on the glass plate for manufacturing a flat panel display;
- horizontally placing the glass plate on a test rack;
- applying an operating voltage to the electrode formed on the glass plate;
- facing a conductive layer-less side of a modulator toward the electrode of the glass plate and arranging the electrode upward of the glass plate, where the modulator is formed at one side thereof with a conductive layer and where the modulator includes electro-optic material;
- applying a reference voltage to the conductive layer of the modulator;
- irradiating light from under the glass plate;
- measuring a modulated optical characteristic of light that has passed through the glass plate and the modulator;
- and
- processing a back-end if the measured optical characteristic is within a prescribed normal scope.
An electro-optic modulator assembly for contactless testing of a flat panel display comprising:
- a first non-conductive plate;
- a conductive layer positioned between the first non-conductive plate and the flat panel display, the conductive layer covering a surface of the first non-conductive plate;
- a second non-conductive plate positioned between the conductive layer and the flat panel display;
- one or more sealing structures positioned between the first non-conductive plate and the second non-conductive plate, a cavity being defined by walls of the sealing structures and walls of portions of the conductive layer and second non-conductive plate that are separated by the sealing structures;
- a modulation layer, including electro-optic material, positioned within the cavity that is defined between by the walls of the sealing structures and the walls of portions of the conductive layer and second non-conductive plate that are separated by the sealing structures;
- and
- a conductive material extending between a position beside at least one of the sealing structures and a position beside the first non-conductive plate.
Dependencies are inferred from the claim text.