In this paper, we identify an intractable problem known as light leakage, which is more critical in IPS mode compared to VA mode, and we propose diverse ways of tackling this issue. In general, the light leakage phenomenon arises from the stress generated by the bending of the LCD panel. This paper proposes three processing methods for reducing the mechanical stress causing LCD panel bending and light leakage. Changes in the lamination process of polarizer films and the application of a buffer layer can reduce the bending level by 32% and 21%, respectively. The combination of polarizer films according to variation of thickness also help to reduce the panel bending. In particular, it is important that a combination of these proposed modifications could provide the better solution to reduce the panel bending. From a geometric solution to a change in materials, the whole history of IPS light leakage solutions is presented succinctly. With this paper-or review, to be more precise-the mechanism underlying the light leakage phenomenon is understood, and this understanding is applied to derive answers to the problem caused by the phenomenon in question.