Optimized blue-phase liquid crystal for field-sequential-color displays

Abstract

An optimized blue-phase liquid crystal (BPLC) with a moderate dielectric constant, manageable capacitor charging time, high voltage holding ratio, and submillisecond gray-to-gray response time at room temperature is developed. Using protruded triangular IPS electrodes, the operation voltage can be reduced to 15V while keeping ~74% transmittance. Such a BPLC enables single-TFT addressing and 240-Hz operation. Potential application for color-sequential displays is emphasized. Our new approaches have solved the most critical charging time issue and would accelerate the emergence of the long-awaited blue-phase LCDs. The primetime for BPLCD is around the corner.

Alignment control technology of liquid crystal molecules

“…The research is focused on the polymer‐stabilized BP, and one of the biggest challenges is the high driving voltage. To solve this problem, some approaches are reported, such as to reverse the polarity of the voltage applied to opposite electrodes, to increase the height of the electrodes, to use the corrugated electrodes, and to uniformly align the BP lattice plane with the substrate …”

Image content adaptive color breakup index for field sequential color displays using a dominant visual saliency method

“…However, the relative velocity between the displayed images and an observer's eyes, which may be induced by saccadic eye movements or a smooth pursuit of a moving object, causes the sequentially produced primary color fields to imperfectly overlap on the retina. Therefore, FSC displays suffer from an important drawback: color breakup . Figure (c) illustrates the basic mechanism of color breakup and a representation of a distorted retinal image containing the color breakup, which appears as rainbow‐like fringes that disturb an observer's viewing.…”

“…As color breakup degrades image quality, causes discomfort to observers, and consequently impairs the application of FSC displays, a number of studies have been dedicated to this field, which can be roughly grouped into two research lines. The first line of research seeks approaches that can suppress the color breakup.…”

“…Therefore, FSC displays suffer from an important drawback: color breakup. 1,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Figure 1(c) illustrates the basic mechanism of color breakup and a representation of a distorted retinal image containing the color breakup, which appears as rainbow-like fringes that disturb an observer's viewing. In particular, the saccade-induced color breakup is much more severe than the smooth-pursuit-induced breakup due to the increased speed of eye movements and is thus of greater concern for FSC displays.…”

“…In particular, the saccade-induced color breakup is much more severe than the smooth-pursuit-induced breakup due to the increased speed of eye movements and is thus of greater concern for FSC displays. [9][10][11][12][13][14][15] As color breakup degrades image quality, causes discomfort to observers, and consequently impairs the application of FSC displays, a number of studies have been dedicated to this field, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] which can be roughly grouped into two research lines. The first line of research seeks approaches that can suppress the color breakup.…”