Virtual image display device
First Claim
1. A virtual image display device comprising:
- an image element;
an optical member that directs a light from the image element toward an eye of an observer for visual recognition of an image,the optical member having a prism-like light guide part that guides an image light from an image display element as the image element to the eye of the observer while reflecting the light inside, andthe light guide part having a prism that enables see-through observation of an outside world light while guiding the image light and a light-transmissive member that is connected to the prism and assists a see-through function of the outside world light; and
a frame unit that supports the image element and the optical member so that the optical member may be placed in front of the eye of the observer,the frame unit having a limiting part that mechanically limits displacement of the optical member partially fixed to the frame unit.
1 Assignment
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Accused Products
Abstract
A limiting part limits displacement of an optical member partially fixed to a frame unit, and excessive stress applied on the optical member and deformation of the optical member may be prevented. That is, support strength of the optical member may be improved by supplementarily using the limiting part. Note that the optical member is partially fixed to the frame unit, and fastening parts and the number of parts are reduced and downsizing becomes easier and reduction in weight of the virtual image display device is easier. Further, the optical member is partially fixed to the frame unit, and thus, even when there is a difference in coefficient of thermal expansion between the optical member and the frame unit, the expansion or the like of the optical member with respect to the frame unit is allowed and distortion, deformation, breakage of the optical member may be prevented more reliably.
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Citations
14 Claims
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1. A virtual image display device comprising:
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an image element; an optical member that directs a light from the image element toward an eye of an observer for visual recognition of an image, the optical member having a prism-like light guide part that guides an image light from an image display element as the image element to the eye of the observer while reflecting the light inside, and the light guide part having a prism that enables see-through observation of an outside world light while guiding the image light and a light-transmissive member that is connected to the prism and assists a see-through function of the outside world light; and a frame unit that supports the image element and the optical member so that the optical member may be placed in front of the eye of the observer, the frame unit having a limiting part that mechanically limits displacement of the optical member partially fixed to the frame unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification