Patent ID: 8576255

Claim:
An image correction method wherein: a display area of a display panel is divided into a plurality of areas, cross points between border lines of the plurality of areas are defined as reference points, a luminance only at each reference point is measured, a luminance at a point still not measured is calculated from the luminances only at the reference points, by interpolation; wherein, as said interpolation, an interpolation method that uses a third-order Spline curve is used; wherein said interpolation is such that a first interpolation is calculated in a first direction and, by using a result of the first interpolation calculation, an interpolation calculation is made in a direction perpendicular to the first direction, so that the luminances are obtained for the entire display panel, wherein in accordance with the luminance at each point still not measured and the luminance at each reference point, when a luminance data at a highest gradation level is input to the display panel, a display luminance on the display panel is corrected; correction of the display luminance on the display panel is performed in such a manner that a distribution of the display luminance forms a curved plane taking a highest luminance at a center of the display panel and a lowest luminance at a periphery of the display panel; wherein in accordance with luminance at each point still not measured and the luminance at each reference point, when a luminance data at a lowest gradation level is input to the display panel, a display luminance on the display panel is corrected; correction of the display luminance on the display panel is performed in such a manner that a distribution of the display luminance forms a curved plane taking a lowest luminance at a center of the display panel and a highest luminance at a periphery of the display panel; wherein the curve of the distribution of the display luminance when the luminance data at the highest gradation level is input to the display panel and when the luminance data at the lowest gradation is input to the display panel are similarly shaped and opposite one another in regards to the horizontal axis.