Cell-gap Measurement of Reflective TN-LCD while Considering Surface Reflection

15.4: Reflective LCD Cell Gap Measurement by QHQ Compensation Method

A phase compensation method is presented for measuring the cell gap of reflective LCD. We use the so-called QHQ compensator that is made up of two quarter-wave plates (Q) and one half-wave plate (H). This method is different from other compensation methods in that we can change both the orientation angle and retardation value of the compensator by rotating the quarterwave and halfwave retarders...

P-130: Large-Cell-Gap Bistable TN-LCD Based on Dual-Frequency Operation

A bistable twisted nematic liquid crystal display based on dual frequency driving electronics has been demonstrated. By using special combinations of alignment layers and liquid crystals, bistability can be achieved readily with cell gaps as large as 5μm.

22.2: Photoaligned Transmissive Bistable TN-LCD

A new TN-ECB mode reflective liquid crystal display with large cell gap and low operating voltage

A new TN-ECB mode liquid crystal display is developed for reflective liquid crystal displays (RLCDs). This new TN-ECB mode has a larger cell gap and lower operating voltage than most recently developed RLCDs. It also has a small wavelength dispersion and has a good dark state at the low operating voltage. It is particularly suitable for reflective crystalline Si backplane CMOS AMLCDs.

P-85: Reflective Liquid-Crystal Cell-Gap Measurement Using Input-Polarization-Angle Dependence

Surface-reflection component is blocked by the analyzer A simple technique of measuring a reflective TN liquid crystal (LC) cell gap using a laser is described. It utilizes a very unique property of strong input-polarization-angle dependence of the reflective LCs, which is not observed in the conventional transmissive LCs. This technique eliminates the surface-reflection problem which can be en...