Display device and electronic watch

Abstract

In a display device, a light ray transmitted through an area which varies a polarization axis, and a light ray transmitted through an area which does not vary the polarization axis, respectively, become a linearly polarized light component (a first returning light ray) which is a specularly reflected from a specular reflecting element, and transmitted through a second polarization separator, a polarization changing element, and a first polarization separator, and a linearly polarized light component (a second returning light ray) which is specularly reflected by the second polarization separator, and transmitted through the polarization changing element and the first polarization separator. The first and second returning light rays present a background portion and a segment portion in a bright display. Both the first returning light ray and the second returning light ray are specularly reflected, presenting both the background portion and the segment portion in a mirror-like fashion. Specifically, the display device may present a display mode with both the background portion and the segment portion in a mirror-like image, a display mode with both the background portion and the segment portion in a matte image, or a display mode with one of the background portion and the segment portion in a mirror-like image and the other in a matte image. With a coloring element added, display modes are thus diversified by combining a diversity of tones combined with texture differences. Of the returning light which is reflected from the specular reflecting element, transmitted through the second polarization separator, the polarization changing element, and the first polarization separator, a linearly polarized light component, which is unable to be transmitted through the first polarization separator with the direction of its polarization axis deflected from a first direction, is reflected from a fourth polarization separator. Then, the linearly polarized light component repeats reflections between the reflecting element, the fourth polarization separator, and when the polarization axis of the linearly polarized light component becomes aligned with the first direction, the linearly polarized light component is transmitted through the first polarization element.

Dependencies are inferred from the claim text.