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We have successfully developed 27inch 8K4K Liquid Crystal display by utilizing BCE IGZO (Back Channel Etched InGaZnO) transistor. Its pixel density is 326ppi like smartphone, but the screen size is 27inch, middle class desktop monitor size. And its LCD panel supports 120Hz driving. BCE IGZO-TFT realizes low resistance wiring material because of its low process temperature. Above reason, we can enlarge the screen size to desktop monitor class, remaining smartphone class fine resolution. Also this system contains HDR (High Dynamic Range) driving system, and wide color gamut, by IGZO transistor and Negative LC FFS pixel structure.

We have developed a novel bright reflective color display, which combines the polymer network liquid crystal (PNLC) containing dichroic fluorescent dyes and the ultra-low-power driving technology. The high reflectance, 60% at the maximum, was achieved by enhancement of the external light emission from the dyes due to the light-scattering effect of PNLC.

A Novel transflective LCD has been developed with introducing a microlens array and a highly collimated backlight system. This new technology provides excellent visibility both outdoors and indoors without increasing power consumption of backlight.

A novel reflective color LCD without polarizer has been developed with using PDLC and retro-reflector. Bright color images including moving images are available with utilizing ambient light. Our novel LCD will create a new application area such as electronic paper.

We have developed a transmissive type of electrowetting display driven by passive matrix. The novel display shows high image quality because it provides high contrast ratio 60,000:1 at display normal direction and wide viewing angle character (CR 20,000 at±70 degree). As the display has a memory characteristic, it also exhibits a feature of low power consumption.

— The development of multi-primary-color (MPC) display systems is one of the big paradigm shifts in recent display technologies and induces new potentials of display devices. The development of MPC display systems for different goals is briefly reviewed. Especially, by employing MPC systems, it is possible to reproduce the real material colors faithfully and efficiently. For signal processing, MPC systems have a big advantage in the so-called color-reproduction redundancy. A number of applications can be derived from this characteristic, such as improving the viewing-angle dependency issue and power savings. On the other hand, MPC systems have a typical trade-off versus RGB-standardized input signals, especially for reproducing bright green. New algorithms to moderate this trade-off on MPC systems by employing color-reproduction redundancy are proposed. The goal of our algorithms is to maintain the compatibility with RGB-based input signals though the initial display design so that the characteristics of MPC systems are not changed or lost. These algorithms indicate that MPC display systems are applicable not only for a specifically limited objective but also for other applications, e.g., TV broadcasting.

The current standards of color gamut measurement regarding RGB-primary displays are not applicable to multi-primary color (MPC) display systems. We show two case studies that measurement performed by simply extending the use of today's RGB-based standards is not able to provide accurate evaluation of the color gamut of MPC displays. The color gamut of MPC displays depends on signal processing algorithm; therefore, for measuring the color gamut of MPC displays, we propose to use not only the input signals of the maximum values for respective colors but also medium-level signals which are able to measure the chromaticity of respective primary color points on MPC display.

For the first time, we have developed a 60-inch diagonal size see- through display using polymer network liquid crystal (PNLC) technology. The color display system by combination of the see- through display and a projector enables distinguishing eye-catch effect. It creates new application of displays, such as information display, digital signage and substitution of window.

We have developed an over 60-inch size Moth-eye anti-reflection surface, which has original shaped nanostructures. The minimum reflectance was 0.02% and the average was less than 0.04% with little wavelength dependence. Moreover an anti-glare function was added. The 60-inch LCD applied AG Moth-eye surface had an excellent visibility in bright environments.

We have newly developed a 5-primary-color 60-inch FHD LCD with pixels composed of R1CGR2BY six sub pixels. The prototype is designed to reproduce all of real surface colors. We have also improved its viewing angle performances by applying a multi-primary color matching technology.

We have developed a novel reflective LCD without polarizers, which is sure to provide excellent visibility (reflectance = 50%, CR = 10:1). Moreover, we have also achieved extremely low power consumption of 10 microwatts to introduce low frequency driving (less than 1Hz) without flicker and image sticking. These characteristics were realized to combine pixel memory circuit and new PNLC material.

— A novel reflective color LCD without polarizers has been developed using a PDLC film and a retro-reflector. Bright color images including moving images are achievable with ambient light. This novel LCD will enable the new application area of electronic paper.

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).

— We have developed a novel liquid-crystal-display (LCD) system referred to as a “Double-Faced LCD.” It has only one LC panel and one lighting system, but it works not only as a transmissive-type LCD from one side but also as a reflective-type LCD from the other side. Therefore, the thickness and the weight of the Double-Faced LCD can be reduced compared to those of conventional LC modules that have two LC panels and two lighting systems.

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 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.

— An electrically controlled birefringence (ECB) LCD often has the limitation of a narrow viewing angle. To solve this problem, a double-layer ECB (D-ECB) LCD with a wide viewing-angle cone is proposed. In this device, each layer compensates the variation of retardation of the other over a wide range of viewing angles.