CPC G02B 5/0816 (2013.01) [G02B 1/14 (2015.01); G02B 5/003 (2013.01); G02B 5/32 (2013.01)] | 11 Claims |
1. A display apparatus, comprising: a display panel and a functional substrate that is located on a light exit side of the display panel, the functional substrate comprising:
a transparent substrate configured to have a first total reflection angle on an inner surface of a side far from the display panel;
a specular reflection layer located on a side of the transparent substrate; and
a holographic film layer located between the transparent substrate and the specular reflection layer and configured so that a part of incident light, of which a propagation direction faces towards the transparent substrate and an incident angle is within a first incident angle range, is diffracted and is emitted to the transparent substrate at a first exit angle, the first exit angle being greater than or equal to the first total reflection angle.
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