In-plane switching mode

In an IPS mode, the interdigitated electrodes are fabricated on the same substrate, and liquid crystal molecules are initially homogeneously aligned with a rubbing angle of -10° with respect to the striped electrodes. The transmission axis of the polarizer can be set to be parallel 

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M. Oh-e and K. Kondo, Electro-optical characteristics and switching behavior of the in-plane switching mode, Appl Phys. Lett., 67, 3895 (1995). 

M. Oh-e, M. Ohta, S. Arantani, and K Kondo, Principles and characteristics of electro-optical behavior with in-plane switching mode, Asia Display 95, p. 577 (1995). 

Y. Saitoh, S. Kimura, K. Kusafuka, and H. Shimizu, Optimum film compensation of viewing angle of contrast in in-plane-switching-mode liquid crystal display, Jpn. J. Appl. Phys., Part 1, 37, 4822, (1998). 

F. Di Pasqual, H. Deng, F. A. Fernandez, et al.. Theoretical and experimental study of nematic liquid crystal display cells using the in-plane-switching mode, IEEE Trans. Electron Devices, 46, 661 (1999). 

The principle of the IPS (In-Plane Switching) mode is shown in Fig. 4.4.1. In typical LCDs, both substrates have electrodes and the direction of the electric field is perpendicular to the substrates. In the IPS mode, however, only one substrate has electrodes and the electric field runs parallel to the substrates. The molecular long axes of the liquid crystal molecules are thus parallel to the substrates whether an electric field is or is not applied. In other words, the switching of the liquid crystal molecules by the electric field remains within a single plane. 

An in-plane switching mode liquid crystal display device comprises first and second substrates, a plurality of gate and data bus lines defining pixel regions and arranged on the first substrate, a plurality of data electrodes on same plane of the data bus lines these some parts are overlapped with adjacent gate bus line, a passivation layer on the data electrodes, a plurality of common electrodes on the passivation layer these some parts are overlapped with adjacent data electrodes, and a liquid crystal layer between the first and second substrates. 

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