Uchida Laboratory of the Graduate School of Engineering at Tohoku University exhibited a display made with a special resin sheet to which images are projected from behind.
Simply by attaching the sheet to a glass or transparent plastic plate, it can be used as a flat-screen TV. The laboratory developed the sheet with the help of NEDO (New Energy and Industrial Technology Development Organization).
The display with the resin sheet can show clear images even in a bright environment. At the laboratory's booth, it showcased an 80-inch display with a thickness of about 20cm.
Images are projected from behind the display as in the case of rear-projection TVs. But the new display can be thinner than rear-projection TVs because of its simple structure, according to the laboratory.
Though details were not revealed, light is refracted and diffused by a special internal structure of the resin sheet. The degree of refraction can be changed by accumulating the sheets.
Because the polarization state of light is maintained when the light is passing through the sheet, the display can be used to project 3D images too. At the booth, the laboratory had a demonstration of watching images taken by two small cameras with polarization glasses. Because the projected light diffuses widely, it is possible to watch sharp 3D images on the display at an angle, according to the laboratory.