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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.

It is well known that slightly tilted homeotropic alignment of liquid-crystal molecules is obtained by oblique evaporation followed by homeotropic treatment. However, this method has disadvantages in obtaining large area uniformity and productivity because of the requirement of large vacuum equipment. In this paper, a new alignment technique of slightly tilted homeotropic alignment using the rubbing method (THR method) is proposed, and its applicability to display devices is discussed.

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.

— 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 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.

Electrically controlled birefringence (ECB) mode displays using liquid crystal with negative dielectric anisotropy are promising for highly multiplexed dot-matrix liquid-crystal displays. This mode, however, has the problem of a narrow viewing angle because it is based on the birefringence of the liquid-crystal molecule. To solve this problem, a double-layer electrically controlled birefringence (D-ECB) liquid-crystal display is proposed. In this device, each layer compensates the variation of retardation as a function of viewing angle. As a result, the liquid-crystal display with a wide-viewing-angle cone under the application of voltage was realized.