Abstract—The repair of pixel defects on TFT‐LCDs, which is generally carried out with laser processing or by adopting a redundant structure, is very effective for high‐yield production. However, repair may result in abnormal pixel performance, usually due to the asymmetry of the applied pixel voltage. In this study, based on consideration of the dependence of the threshold contrast on the background luminance, the authors are able to determine the visibility of a repaired pixel. As a result, good agreement between measured and calculated visibility was obtained. Based on these results, we have proposed a new pixel design rule which enables complete repair of pixel defects that cannot be detected by the human eye. This design can also suppress the reduction of the aperture for TFT‐LCD panels. Furthermore, we demonstrate a new redundant structure which reduces the change in pixel performance after repair to a lower level than is attainable with any other reported te