- Effects of stereoscopic images used in the virtual reality on eye movement
- Publish Date : 2001/03/01 Vol.1
- Authors :
- Tsuneto IWASAKI, Shinobu AKIYA, University of Occupational and Environmental Health, Japan
Kageyu NORO, Takeshi TORIIZUKA, Waseda University, Japan
- Report Outline :
- Original article
Appeared on Ergonomics of Human System Interaction Vol. 1, No. 1, 37/41, 1994
Binocular stereoscopic displays have been widely used as effective demonstration in the virtual reality. It is suspected that the reciprocal relation in the visual functions is collapsed as compared with normal viewing when looking at the binocular stereo-scopic images. The eye movement during images load were measured using a nelectro0oculogram (EOG) to investigate the effects of the stereo parallax on visual functions facility. The effect of the large-parallax stereoscopic images was that EOG disintegration was high, indicating significant inhibition of cooperative movement of the eyes.
- Development of the systems to produce virtual reality
- Publish Date : 2001/03/01 Vol.1
- Authors :
- Takeshi KAWAI, Kageyu NORO, Waseda University, Japan
- Report Outline :
- Technical note
Appeared on Ergonomics of Human System Interaction Vol. 1, No. 1, 32/33, 1994
In virtual reality (VR), sense of reality is important. Though we produce VR using current system, there are various problems in those. Therefore we need to develop the systems to produce VR.
In this research, we developed following 3 systems. 1. Dummy head recording system, 2. Horizontal display VR system, and 3. System to intervene virtual space with both hands.
We will produce VR using these systems, and examine the applications and the effects of those.
- The influence of ambient lighting conditions on luminance contrast of electronic displays
- Publish Date : 2001/03/01 Vol.1
- Authors :
- Satoru KUBOTA, Seikei University, Japan
- Report Outline :
- Technical note
Appeared on Ergonomics of Human System Interaction Vol. 1, No. 1, 21/23, 1994
The effects of the screen illuminance and the sly luminance on the contrast ratio of the different technology displays are investigated. It is shown that the contrast ratio is expressed as a function of the display emitting luminance, the luminance coefficient, the specular reflectance, the screen illuminance, and the superimposed light-source luminance. It is also shown that the relationship between the screen illuminance and the sly luminance due to maintain the contrast ratio n3 is estimated by a simple function.
- Ergonomic aspects of flat panel displays for VDT use
- Publish Date : 2001/03/01 Vol.1
- Authors :
- Susumu SAITO, National Institute of Industrial Health, Japan
- Report Outline :
- Review article
Appeared on Ergonomics of Human System Interaction Vol. 1, No. 1, 20, 1994
Rapidly developed semiconductor technologies in Japan have brought many types of flat panel displays such as LCD (Liquid Cristal Display) and PDP (Plasma Display Panel) for VDT use in the offices. In order to meet the goal of user comfort of these information displays, physiological functions while viewing these displays were experimentally studied. A significant correlation was found between the velocity of lens accommodation or focusing speed of the eye and the subjective visual comfort. A positive type CRT (Cathode Ray Tube), which has dark characters on a light background, was ascertained to be the most appropriate display type, while the most inferior one was traditional LCD with the least visual comfort and the lowest accommodative velocity.
- VDT guidelines for note-type-computer – Making of “VDT Workers” guidelines of Waseda University –
- Publish Date : 2001/03/01 Vol.1
- Authors :
- Hidehiro YORITAKA, Kageyu NORO, School of Human Science, Waseda University, Japan
- Report Outline :
- Technical note
Appeared on Ergonomics of Human System Interaction Vol. 1, No. 1, 14/19, 1994
Note or laptop-type-computers have appeared for 3 and 4 years. They are largely different from desktop-type-computers in their characteristics except the performance. They cannot adopt cultivated comfortable use. The reason for this is that their display has changed from CRT to LCD and their keyboard is smaller. Advantages of LCD are compact, low electric power consumption, etc. On the other hand, it has some faults which it is easy to cause glare, etc.
In the opinion from the site of investigation, this fault is almost caused by the relation between LCD and the surrounding environment, for example lighting, arrangement, etc.
In the VDT guidelines, newly added and revised parts are: how to keep working space, arrangement of note-type-computer (to prevent glare) and adjustment of LCD, etc.
In the separate volume, it is scripted about adjustment by the method of non-parametric approach using flow chart which includes illustration for users’ easy adjustment.
