We have developed the novel color filter structure suitable for our transflective 'Advanced TFT-LCD'. In this paper, characteristics of the CF and display performance of improved 'Advanced TFT-LCD' with high display-quality are discussed.
We propose a novel impulse driving method for the liquid crystal display, which improves motion picture quality without sacrificing maximum brightness. Moreover, we also propose new evaluation method for flat panel display in the bright environment, which reflect the display quality in the actual light situation.
We have developed bright 260,000-color "High Reflective TFT (HR-TFT) " liquid crystal display (LCD) with diffused "Micro Reflective Structure (MRS)" inside a panel. In this paper, influences of rough surface upon the optical characteristics of the reflective type LCD are discussed.
IntroductionFor increasing amount of available information by expanding computer networks, strong demands for mobile information tools such as portable computers and/or personal information tools have been increasing. A reflective type LCD is one of the promising devices in multimedia network society since it has many advantages, namely, its low power consumption, light weight and portability. Moreover, color display function and capability to display moving images are required for a reflective type LCD in the multimedia era. In the above circumstances, realization of color reflective type LCD with high image quality has been expected.
Automatic reed valves are widely used to control refrigerant gas flow in reciprocating compressors for automotive air conditioners. The oil film in the clearance between the reed and the valve seat causes a delay in opening of the valve. This opening delay of the discharge valve leads to over compression, which increases losses such as friction in sliding components and gas overheating. Therefore it is important to understand the behavior both of the oil film and the elastic reed deformation in order to reduce losses due to the delay. This study aims to develop an experimental setup that enables simultaneous visualization of the oil film rupture and measurement of the reed deformation, and to observe this behavior during the valve opening process. The gas-compression stroke is simulated by controlling compressed air with an electromagnetic valve. The oil film rupture is visually observed using a high speed camera through a special valve seat made of glass. The total deformation of the cantilever reed is identified by multipoint strain measurement with 12 strain gauges. The experiment finds that the opening process is divided into four stages. In the first stage, the reed remains stuck to the seat and deforms while the bore pressure increases. In the second stage, cavitation occurs in the oil film and the film starts to rupture. In the third stage, the oil film ruptures and the bore pressure starts to decrease. Finally, in the fourth stage, the reed is separated from the seat and the gas flows through the valve. Reducing the reed/seat contact area changes the reed deformation in the first stage, thereby increasing the reed/seat distance and realizing an earlier oil film rupture and a shorter delay.
Novel reflective color LCDs without polarizers have been developed with using PDLCs and retro‐reflectors. By eliminating polarizers, brightness of our newly developed LCDs has been increased by 51% compared to conventional reflective LCDs, and there still is much room to be improved. What's more, our LCDs can be displayed not only bright text images but also color moving images on, since their response time and driving voltage are significantly fast (63ms) and low (5.5 volts).
Our purpose in this study was to evaluate the preliminary clinical efficacy of soft-copy reading of digital mammography, for a 15-mega-sub-pixel (MsP) and a 9-MsP super-high-resolution liquid-crystal display (SHR-LCD) by use of an independent sub-pixel driving technology. We performed three kinds of phantom observation studies by six radiological technologists. Detectability of a contrast-detail phantom and simulated small objects (SSOs) resembling microcalcifications (MCLs), and shape discrimination ability of SSOs with round and square shapes, were examined and compared with a 5-MP conventional LCD (5-MP LCD). In each study, four types of display magnification ratio were used. The detectability and the shape discrimination ability of the 15-MsP SHR-LCD were highest among the three LCDs of most of the display magnification ratios. The 9-MsP SHR-LCD indicated a higher or equal performance as compared with the 5-MP LCD in the SSO detection and shape studies. The results of our study demonstrated that the SHR-LCDs had good potential to detect MCLs and to evaluate the shape in high-resolution digital mammography.
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