I. Introduction
Significant advances in portable electronics such as cellular phones and personal digital assistants [1]–[8] have led to stringent requirements for panels with a wide viewing angle, good sunlight readability, lightweight, and low power consumption. Given the above requirements, sunlight readable transflective liquid crystal display (TR-LCD) is highly desirable for mobile display applications. Each pixel of a TR-LCD is normally divided into transmissive and reflective regions. The region transmits a backlight while region makes use of the ambient light. In the region, backlight passes through the LC layer once, while in the region, the ambient light traverses the LC twice. Dual-cell-gap [8] and single-cell-gap [1]–[4] approaches have been developed to compensate for the optical path difference in these two regions. Dual-cell-gap approach offers a good match between voltage-dependent transmittance (VT) and reflectance (VR) curves. Thus, although a single gamma curve can be used, its fabrication process is more complicated [2]. On the other hand, single-cell-gap TR-LCD has a simpler structure, but its driving scheme is more complicated.