Enabling Technology Project

Photon Management and Optical Engineering

Outline of the area

Kenji Taniguchi
Specially Appointed Professor,
Osaka University

Internationally considering the emission-reduction target, we focus on the R&D on lowering the energy loss in optics-based technologies that can contribute to the reduction of CO2 emission. We attempt to lower power consumption in liquid-crystal displays and lighting by suppressing unnecessary light and improving its directionality. In addition, we attempt to lower the energy loss and improve the efficiency of light-emitting diodes by optimizing their structure and materials. In this ALCA Enabling Technology project, we examine the germicidal lamp technology in addition to lighting. Moreover, via R&D on solar-cell materials and structures, we effectively utilize solar light and attempt to reduce CO2 emission by decreasing the electricity required for lighting.

More specifically, we investigate new technologies such as perovskite solar cells and tandem one. Moreover, we construct photovoltaic devices separately from photodetectors using laser transmission.


Spatially Imaged Iris Plane Ultra Low Power Consumption Display

Tohru Kawakami
Researcher, Department of Electronics Graduate School of Engineering, Tohoku university

A conventional display diffuses optical rays from screen or surface of display to free space. But only rays which pass through the pupil of human’s eyes are used. The most part of rays are not used. Our display gathers rays of displayed images near eyes of observer and horizontal area in which observers exist in a strong probability. Therefore the most part of rays are used.Consequently ultra high optical efficiency and ultra low power consumption are achieved.

Spatially imaged iris plane ultra low power consumption display

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