The invention provides a small-sized high-resolution transmissive display device which can be employed in a projector of the color-filterless type. The transmissive display device includes a pair of transparent substrates connected to each other via a predetermined space. The transparent substrates are provided with electrodes forming pixels arranged in a matrix form. The above-described space is filled with an electrooptical material so that the transmissivity of an incident light ray is modulated by the electrooptical material for each pixel and thus converted into an emerging light ray. The transparent substrate on the incident side is further provided with micro lenses and micro prisms. The incident light ray includes three primary color components which have been separated so that they enters the transparent substrate at angles different from each other. The micro lenses focus these three primary color components onto each set of three pixels so that the respective color components correctly fall onto corresponding pixels. The micro prisms are located between the corresponding micro lenses and the sets of three pixels. The micro prisms convert the light ray diverging apart from the optical axis of the micro lenses into a substantially parallel light ray.