Information display system having acute-angled diffusion characteristics and image light control film used for the same

An information display system comprising:

• an image projection apparatus having a display panel and a point or surface light source configured to irradiate the display panel with light;
• a transparent sheet configured to reflect the light from the image projection apparatus;
• a light direction changing panel configured to direct a projection direction of the light from the image projection apparatus toward the transparent sheet;
• a first image light control film provided on an upper surface of the image projection apparatus and configured to restrict an emission direction of the image light such that the image light is not directly delivered to an observer and the image light reflected by the transparent sheet is recognized by the observer;
• and a protective cover configured to absorb or reflect near-infrared light and infrared light,
• wherein the image projection apparatus is arranged above the observer, and an image is displayed to inside of a space via a transparent projected member that partitions the space,
• wherein the transparent sheet is composed of a polarization plate and a transparent diffusion sheet, and is provided on an inner surface of a display region set on a part of the transparent projected member,
• wherein the protective cover is provided on a light emission side of the light direction changing panel, and
• wherein a second image light control film is provided between the projected member and the transparent sheet.