英语论文网

Abstract
In this paper, we developed a novel hyperreality display called theHead Dome Projector (HDP). 英语论文代写The HDP is a head-mounted displayconsisting of a dome-shaped screen with a radius of 40 cm, amobile projector with ultra-wide projection lens and LED lightsources. The main feature of the HDP is very wide viewing angle of115 degrees horizontally by 80 degrees vertically without headtracking and 360 degrees by 360 degrees with head tracking.According to our objective evaluation comparing the HDP with aflat-panel display (FPD), the HDP realizes hyperreality 1.5 to 2.5points higher than that realized by an FPD in the case of ±5 levelevaluation for HD motion images

1. Introduction
CAVE [1] and CyberDome Display [2] are well-knownimmersive hyperreality or virtual reality displays. However, inorder to make such immersive displays, a large space of the orderof one room is required, and so they have yet to be commercializedfor the home-use or personal-use markets.In order to make displays compact and personal, a headmountedtype display (HMD) has already been developed andcommercialized. However, the HMD does not achieve immersionbecause of the small viewing angle of less than 30 degreesOn the other hand, compact mobile projectors with RGB LEDlight sources have recently been developed and commercialized[3]. They have certain advantages, such as wide color gamut,compactness and environmentally friendly characteristics, but theirefficiency is insufficient for projection TV with high intensity ormobile use under bright illumination.Our objectives are to develop a compact and wide viewinghyperreality dome projector for personal use, taking advantage ofthe compactness and wide color gamut of LED light sources.Although our display is a head-mounted display (HMD), it does notuse a flat panel but a Head Dome Projector (HDP) with a curvedscreen.

2. Head Dome Projector (HDP) Concept
Figure 1 shows our proposed concept of the HDP.The HDP mainly consists of a curved screen, a compactprojector and a head tracking technology. In addition, since theHDP is completely separated from the external world by using ahelmet-like case including a curved screen, it is uninfluenced bycircumference illumination but increases the feeling of immersion.The main features of the HDP are as follows.(1) Compact and wide viewing of higher than 100 degrees bymeans of a curved screen and wide viewing compactprojector(2) Motion parallax by using head tracking technology realizinga 360-degrees viewing(3) Wide color gamut by means of RGB LED lightTaking advantage of these features, our target is a personal-uses hyperreality display as shown in Figure 2.

5. References
[1] C. Cruz-Neira et al.,“The CAVE: Audio Visual Experience Automatic Virtual Environment.” Communications of the ACM, 35, pp.64-72 (1992)
[2] N. Shibano et al., “CyberDome: PC Clustered Hemi Spherical
Immersive Projection Display” , Proc. of ICAT 2003 (2003)
[3] Toshiba, TDP-FF1A,
https://www.toshiba.co.jp/about/press/2005_12/pr_j1401.htm
[4] T. Hatadahttps://www.51lunwen.org/ et al., “Induced effect of direction sensation
and display size-a basic study of realistic feeling with
wide screen display “, J of ITEJ, vol.33, No.5, pp407-413 (1979) (in Japanese),