Display apparatus, wearable apparatus, and method of operating the display apparatus

1. A display apparatus, comprising:

a display panel; and

an optical main body;

wherein the display apparatus has a first eyepiece side for viewing image on a first objective side of the display apparatus, and a second eyepiece side for viewing image on a second objective side of the display apparatus, the first eyepiece side being different from the second eyepiece side, the first objective side being different from the second objective side;

the optical main body comprises:

a first lens on a light emitting side of the display panel, the first lens is on the second eyepiece side of the display apparatus, the display panel is on the second objective side of the display apparatus; and

a transflective mirror between the first eyepiece side and the first objective side of the display apparatus and between the second eyepiece side and the second objective side of the display apparatus, and configured to:

reflect a first portion of light emitted from the display panel to the first eyepiece side;

allow a second portion of light emitted from the display panel to transmit through the transflective mirror to the first lens, and transmit through the first lens to the second eyepiece side of the display apparatus; and

allow light from the first objective side of the display apparatus to transmit through the transflective mirror to the first eyepiece side of the display apparatus.

2. The display apparatus of claim 1 , further comprising a second lens and a third lens on a light emitting side of the display panel, the transflective mirror is between the second lens and the third lens, and the first lens is on a side of the second lens, the transflective mirror, and the third lens distal to the display panel;

wherein the transflective mirror is configured to allow the second portion of light emitted from the display panel to transmit through the second lens, the transflective mirror, and the first lens.

3. The display apparatus of claim 2 , wherein the transflective mirror is configured to allow the second portion of light emitted from the display panel to transmit through the second lens, the transflective mirror, the third lens, and the first lens.

4. The display apparatus of claim 2 , wherein

the second lens is on the first eyepiece side of the display apparatus and the third lens is on a first objective side of the display apparatus; and

the first lens is on the second eyepiece side of the display apparatus and the display panel is on a second objective side of the display apparatus.

5. The display apparatus of claim 1 , wherein the display panel has a first edge and a second edge; and a normal distance between a reflective surface of the transflective mirror and a light emitting surface of the display panel gradually decreases along the direction from the first edge to the second edge.

6. The display apparatus of claim 5 , wherein the reflective surface is a concave surface concaved away from the display panel.

7. The display apparatus of claim 2 , wherein the display panel has a first edge and a second edge;

a thickness of the second lens gradually decreases along a direction from the first edge to the second edge; and

a thickness of the third lens gradually decreases along a direction from the second edge to the first edge.

8. The display apparatus of claim 1 , wherein a projection of the transflective mirror on a surface comprising a light emitting surface of the display panel substantially covers the light emitting surface.

9. The display apparatus of claim 2 , wherein a projection of the transflective mirror on a surface substantially perpendicular to a light emitting surface of the display panel substantially covers that of the second lens.

10. The display apparatus of claim 1 , wherein the transflective mirror is between the first lens and the display panel.

11. The display apparatus of claim 1 , wherein the first lens is a convex lens configured to magnify image displayed on the display panel.

12. The display apparatus of claim 1 , wherein a projection of the first lens on a surface comprising a light emitting surface of the display panel substantially covers the light emitting surface.

13. The display apparatus of claim 1 , further comprising a rotator connected to the optical main body and configured to rotate the optical main body.

14. The display apparatus of claim 13 , wherein the rotator comprises a rotating shaft connected to the optical main body and configured to rotate the optical main body.

15. The display apparatus of claim 14 , wherein a rotating axis of the rotating shaft is substantially parallel to the light emitting surface of the display panel.

16. The display apparatus of claim 13 , wherein the rotator is configured to control the optical main body to switch between a first configuration and a second configuration;

in the first configuration, the display apparatus is configured to allow a user to view the first portion of light emitted from the display panel and reflected by the transflective mirror to the first eyepiece side of the display apparatus and light from the first objective side of the display apparatus and transmitted through the transflective mirror to the first eyepiece side of the display apparatus;

in the second configuration, the display apparatus is configured to allow a user to view the second portion of light emitted from the display panel and transmitted through the transflective mirror and the first lens to the second eyepiece side of the display apparatus.

17. A wearable apparatus, comprising a display apparatus of claim 1 .

18. The wearable apparatus of claim 17 , wherein the wearable apparatus is a google or helmet.

19. A method of operating a display apparatus of claim 1 , comprising:

controlling the display apparatus to be in a first configuration, in which the display apparatus is configured to allow a user to view the first portion of light emitted from the display panel and reflected by the transflective mirror to the first eyepiece side of the display apparatus and light from the first objective side of the display apparatus and transmitted through the transflective mirror to the first eyepiece side of the display apparatus;

wherein an augmented reality image is displayed and observed from the first eyepiece side.

20. A method of operating a display apparatus of claim 1 , comprising:

controlling the display apparatus to be in a second configuration, in which the display apparatus is configured to allow a user to view the second portion of light emitted from the display panel and transmitted through the transflective mirror and the first lens to the second eyepiece side of the display apparatus;

wherein a virtual reality image is displayed and observed from the second eyepiece side.