| 摘要 |
PURPOSE: A Reflective display device and retro-reflector used therefor is provided to realize a reflective display device which is capable of clear multi-color display with a bright white state and a high contrast ratio, and which prevents a reduction in luminance and chromaticity due to mixed colors. CONSTITUTION: A reflective display device, comprising: a switching layer for switching between a first state which allows transmission of incident light(10) and a second state which changes a direction of travel of the incident light(10); and retro-reflector(8) for reflecting incident light(10) from the switching layer, wherein the retro-reflector(8) is adapted to realize a black state by reflecting an image of a black part of an eye of an observer when the switching layer is in the first state, and as the observer recognizes the image of the black part of the eye.
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