Light Leakage of Multidomain Vertical Alignment LCDs Using a Colorimetric Model in the Dark State

Abstract

Light leakage from liquid crystal displays in the dark state is relatively larger and leads to a degraded contrast ratio and color shift. This work describes a novel colorimetric model based on the Muller matrix that includes depolarization of light propagating through liquid crystal molecules, polarizers, and color filters. In this proposed model, the chromaticity can be estimated in the bump and no-bump regions of an LCD. We indicate that the difference between simulation and measurement of chromaticity is about 0.01. Light leakage in the bump region is three times that in no-bump region in the dark state.

Unifying colors by primes

“…By utilizing Goldbach’s conjecture, this study shows a novel way to compress the RGB color wheel into a much smaller C 235 wheel, alleviating the size problem noted with the current RGB frame. Furthermore, we show that the proposed C 235 color frame can be readily adopted for colorizing any objects with multiple attributes 14 , designing LCD light systems 5 , and coloring DNA codons 17 .…”

“…Take RGB as an example. Each of the R, G, and B colors has 256 values, thus resulting in 3 × 256 2 hues, which makes it challenging to distribute and allocate these many colors and hues on a color wheel 4 , 5 . In addition, the large number of color values may cause a huge computational burden for combining some of them to generate preferred colors 6 .…”

“…The weakness of RGB and CMYK is further reflected in emerging applications, such as cell phones, PCs, and TVs, in which RGB and CMYK are widely applied. For current technologies, each pixel on an LCD 5 screen requires 3 × 8 = 24 pulses to generate R, G, and B lights 7 , which is both time- and energy-consuming. Moreover, the transformation between lights and colors is so complicated that no usable smart system is currently available 8 , 9 .…”