US 2019/0094546 A1 · DISPLAY DEVICE

Abstract

In an optical system of a display device, a second reflection element, a first diffraction element, a first reflection element, and a second diffraction element are disposed along a traveling direction of image light emitted from an image light projecting device. A reflection surface of the first reflection element is a concave surface being a free-curved surface and being recessed in a central portion with respect to a peripheral portion, and an intermediate image is formed between the first reflection element and the second diffraction element. A reflection surface of the second reflection element is a concave surface being a free-curved surface and being recessed in a central portion with respect to a peripheral portion, and an intermediate image is formed between the second reflection element and the first diffraction element. Therefore, an intermediate lens for forming an intermediate image is not provided.

Claims12

Dependent claims

A display device comprising:

a first diffraction element on which image light emitted from an image light projecting device is incident;
a first reflection element on which the image light emitted from the first diffraction element is incident;
and
a second diffraction element configured to emit the image light emitted from the first reflection element toward an eye of an observer, wherein
the first diffraction element, the first reflection element, and the second diffraction element are disposed along a traveling direction of the image light emitted from the image light projecting device,
a reflection surface of the first reflection element is a concave surface with a central portion being recessed with respect to a peripheral portion, and
an intermediate image is formed between the first reflection element and the second diffraction element.

4 more elements

Dependencies are inferred from the claim text.

Display device

Life of this patent

Display device

Life of this patent

Abstract

Claims12