OPTICAL DEVICE AND DISPLAY APPARATUS
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United States of America Patent
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Issued Date -
Oct 28, 2021
app pub date -
Nov 21, 2017
filing date -
Mar 14, 2017
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Abstract
A first stereoscopic image display device (2) is provided with a light guide plate (20) including a plurality of reflectors (31a, 31b, 31c), the first stereoscopic image display device (2) causing an observer to recognize an undistorted stereoscopic image even when the observer views a stereoscopic image from an angle being a high angle with respect to a direction normal to the front surface of the light guide plate. In a plan view from a direction vertical to an outgoing surface (21), when four quadrants are specified for each of the reflectors (31a, 31b, 31c), the four quadrants taking a position of each of the reflectors (31a, 31b, 31c) as an origin, the four quadrants being divided by two straight lines orthogonal to each other and inclined 45° with respect to a direction in which the incident light is incident on each of the reflectors (31a, 31b, 31c), light changed in the optical path by each of the reflectors (31a, 31b, 31c) is emitted to a quadrant adjacent to a quadrant on which incident light is incident.
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