Patent ID: 7791572

Claim:
A method of controlling a picture quality of a flat panel display device, comprising the step of: storing a first compensation data used to compensate a panel defect area of a display panel, wherein the first compensation data is judged by a first inspection process, storing a second compensation data used to compensate a boundary between the panel defect area and a non-defect area of the display panel, wherein the second compensation data is judged by a second inspection process; a first compensation step to modulate data using the first compensation data stored in a memory, wherein first modulated data are supplied to the panel defect area; a second compensation step to modulate data using the second compensation data stored in the memory, wherein second modulated data are supplied to the boundary of the panel defect area and the non-defect area; and displaying the second modulated data on the display panel, wherein the second modulated data, to be supplied to the panel defect area included in the boundary, is to further modulating the first modulated data us the second compensation data.