US 12,169,296 B2
Display apparatus, preparation method thereof and smart mirror
Wei Wei, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/628,054
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Apr. 29, 2021, PCT No. PCT/CN2021/090915
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/233110, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 202010419154.X (CN), filed on May 18, 2020.
Prior Publication US 2022/0276416 A1, Sep. 1, 2022
Int. Cl. G02B 5/08 (2006.01); G02B 1/14 (2015.01); G02B 5/00 (2006.01); G02B 5/32 (2006.01)
CPC G02B 5/0816 (2013.01) [G02B 1/14 (2015.01); G02B 5/003 (2013.01); G02B 5/32 (2013.01)] 11 Claims
OG exemplary drawing
 
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.