Measurement of reflective liquid crystal displays

Abstract

Femtosecond pulse shaping using a liquid-crystal display: Applications to depth profiling analysis Rev. Sci. Instrum. 76, 086104 (2005); 10.1063/1.1994897 Two-dimensional measurements of cell parameter distributions in reflective liquid crystal displays by using multiple wavelengths Stokes parameters J. Appl. Phys. 95, 4371 (2004); 10.1063/1.1650892 Equivalent retarder approach to reflective liquid crystal displaysCell gap thickness is one of the most important design parameters for liquid crystal displays ͑LCD͒. Existing measurement methods only apply to transmittive LC cells. These methods are obviously unsuitable for measuring the cell gaps of reflective LCDs with internal reflectors. This kind of LCD includes single polarizer reflective displays and liquid crystal on silicon displays. The objective of this article is to introduce various reflective methods of LCD cell characterization that are both applicable to transmittive and reflective LCDs.

Use of polar decomposition of Mueller matrices for optimizing the phase response of a liquid-crystal-on-silicon display

“…Figure 2(a) shows the experimental values for the depolarization power, Δ(g), calculated in accordance with Eq. (8). This parameter shows a maximum value of about 5% along the entire pixel dynamic range.…”

“…Therefore, a reflective TNLC display behaves in essence as a linear retarder with a neutral axis orientation and a retardance angle that are voltage-dependent [7]. This approach has been applied for optimizing the brightness and contrast of a reflective TNLC display [7], as well as for determining the design parameters of reflective TNLC cells [8].…”

13.4: Cell Gap Measurements of Flexible Reflective TN‐ and STN‐ LC Cells

“…The cell gap can be obtained from this spectrum. As demonstrated by Tang and Kwok, the wavelength caused zero reflectance in the spectrum satisfies one of the following cases [3,4]:…”

“…Many measuring methods have been introduced in the past [1][2][3][4][5][6]. All of them were developed for LC cells on glass (silicon) substrates, with no consideration of specific features of an LC cell on plastic.…”

“…However, the differences between those two types of LC cells can render standard methods inadequate for flexible LCDs. For example, the known optical methods [1][2][3][4][5][6] allow us to measure LC cells that are without polarizers, whereas an LC cell on plastic often includes one or two thin internal polarizers coated directly on the plastic substrate. In contrast to glass, plastic can be optically anisotropic.…”