Aira Hotta

64.2: Hyperrealistic Display for Automotive Application

We propose a monocular projection head-up display. It uses monocular vision that eliminates the depth cues caused by parallax information and it can control the depth point of the display image. Through examination in a simulator, we confirmed the enhancement of monocular depth perception.

Effect of Non-DC Voltage Applied during N*–SmC* Phase Transition on Alignment of Half-V-Shaped Switching Ferroelectric Liquid Crystal

In a half-V-shaped switching ferroelectric liquid crystal (half-V FLC), a liquid crystal material with N*?SmC* phase transition is used. When the material is cooled from N* phase to SmC* phase without an applied electric field, two types of domain with spontaneous polarization (Ps) in the upward or downward direction to the substrate plane are formed. In the conventional half-V FLC, a DC voltage is applied to the liquid crystal during the phase transition to form either type of domain selectively. Is the DC voltage application indispensable for selecting one domain? To clarify this point and to reduce the expected residual charge due to the application of the DC voltage, various waveforms of non-DC voltage were studied. We achieved the formation of one type of domain by applying an asymmetric rectangular waveform adjusted to cancel the effective DC component, and the generation of residual charge was avoided. The obtained half-V FLC alignment showed desirable black appearance in the crossed polarizers.

Depth perception control by hiding displayed images based on car vibration for monocular head-up display

We have developed a novel depth perception control method for a monocular head-up display (HUD) in a car. However, it is difficult to achieve an accurate depth perception in the real world because of car vibration. To resolve this problem, we focus on a property that people complement hidden images by previous continuous observed images. We hide the image on the HUD when the car is vibrated. We aim to point at the accurate depth position by using HUD images with having users compliment the hidden image positions based on the continuous images before car vibration. We developed a car which detects big vibration by an acceleration sensor and is equipped with our monocular HUD. Our method pointed at the depth position within a 3.4 [m] error, which was 2 times more accurate than the previous method does.

19.4: Novel Depth Perception Controllable Method of WARP Under Real Space Condition

We developed a compact, 2-liter, monocular head-up display that is WARP-mountable on an automobile. We proposed a novel depth-perception-controllable method and examined the depth perception enhancement characteristics under real space conditions. We confirmed depth perception was controlled as far as 60 meters and true AR was achieved.

A novel wide-field-of-view display method with higher central resolution for hyper-realistic head dome projector

In this paper, we propose a novel display method to realize a high-resolution image in a central visual field for a hyper-realistic head dome projector. The method uses image processing based on the characteristics of human vision, namely, high central visual acuity and low peripheral visual acuity, and pixel shift technology, which is one of the resolution-enhancing technologies for projectors. The projected image with our method is a fine wide-viewing-angle image with high definition in the central visual field. We evaluated the psychological effects of the projected images with our method in terms of sensation of reality. According to the result, we obtained 1.5 times higher resolution in the central visual field and a greater sensation of reality by using our method.

P-73: Reflective Color LCD Composed of Stacked Films of Encapsulated Liquid Crystal (SFELIC)

A reflective color liquid crystal display (LCD), which dose not consume power for backlighting, is a key device for portable information equipment. A novel structure for three-layered guest-host (GH) liquid crystal displays (LCDs) has been proposed. The structure, called stacked films of encapsulated liquid crystal (SFELIC), has no intermediate substrates, and is expected to realize low cost and high brightness while eliminating parallax.

Hyperrealistic head-up-display for automotive application

We proposed a novel hyper-realistic head-up display (HUD) concept(WARP) and developed a prototype WARP system. It uses monocular vision that eliminates the depth cues caused by parallax information. Our developed WARP system achieved a free depth control of the HUD image position.

72.4: Hyperreality Head Dome Projector (HDP) using LED Light Source

In this paper, we developed a novel hyperreality display called the Head Dome Projector (HDP). The HDP is a head-mounted display consisting of a dome-shaped screen with a radius of 40 cm, a mobile projector with ultra-wide projection lens and LED light sources. The main feature of the HDP is very wide viewing angle of 115 degrees horizontally by 80 degrees vertically without head tracking and 360 degrees by 360 degrees with head tracking. According to our objective evaluation comparing the HDP with a flat-panel display (FPD), the HDP realizes hyperreality 1.5 to 2.5 points higher than that realized by an FPD in the case of ±5 level evaluation for HD motion images

A reflective tri-layered guest-host color TFT-LCD

— We have developed a new reflective tri-layer color TFT-LCD with CMY guest-host LC materials. Optical improvements and optimization have resulted in high reflectance and good color image. We have shown that the tri-layer structure has high feasibility for bright color LCDs.

Large Area Microencapsulated Reflective Guest-Host Liquid Crystal Displays and Their Applications

We have developed reflective liquid crystal displays using microencapsulated guest-host liquid crystals, whose size was sufficiently large for viewing documents. A high-brightness image can be realized because there is no need for polarizers. Easy fabrication processes, consisting of screen-printing of microencapsulated liquid crystal and film adhesion, have enabled the realization of thinner and lighter cell structures. It has been confirmed that the display is tolerant of the pressures to which it would be subject in actual use. The optimization of fabrication processes has enabled the realization of reflectance uniformity in the display area and reduction of the driving voltage. Our developed display is suitable for portable information systems, such as electronic book applications.