Transmission type display device

PURPOSE: To provide a transmission type data display with high luminance and high resolution in which a visual field angle can be limited. CONSTITUTION: A display assembly 32 is provided with a display screen 40 having a flat prescribed area as a whole for displaying transmissible data. This is provided with a light source 46 for generating a light with prescribed intensity, and a circular Fresnel lens 48 is arranged between the light source and the display screen. The Fresnel lens allows the light source 46 to form an image through the display screen 40 at the opposite side of the light source on the display screen. A diffusion board 42 for diffusing the light is arranged between the light source 46 and the display screen 40. The intensity of the light source is selected so as to be suitable for allowing a person to directly visualize the transmissible data.