From a technical point of view of the imaging principle Fresnel optical screen oled module

Rear projection screen is widely used in optical large conference room, command and control centers, training and education, video conferencing, showrooms, exhibition halls, auditoriums, stadiums, concert halls, supermarkets, airports, railway stations, docks, cafeterias, windows and other occasions and even a variety of strong ambient light complex environments. So in the end what is the Fresnel optics for the optical screens and screen, how they imaged it, the traditional projection screen what difference does it? Character OLED Display

1, the optical screen definition
Contains one or more optical lens system called optical projection screen screen, inside the lens, the light is refracted, the direction is changed, only the rear projection screen to control the direction of light, so optical screens have only rear projection screen. The direction of light depends on the refractive index of projection screen material and the cross-sectional shape of the lens.
2, the optical Fresnel lens
Fresnel lens surface of the lens, only play a part, if other parts removed and leveled a valid part of the lens (shown at right) to get a Fresnel lens. Lenses from CAD / CAM machining center using diamond cutting, a screen, as many as 10,000 different lens profile, rear projection screen molds huge investment, DNP company is the sole owner of its own mold factory rear projection screen manufacturer. DNP the product of each series has a different focal length; each section of the screen size = pitch (resolution). Graphic OLED Display