US 12,265,224 B2
Near eye display apparatus
Yulong Wu, Beijing (CN); Ke Li, Beijing (CN); Ruijun Dong, Beijing (CN); Chenru Wang, Beijing (CN); Na Han, Beijing (CN); Jiarong Bai, Beijing (CN); Lili Chen, Beijing (CN); and Hao Zhang, Beijing (CN)
Assigned to Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/638,084
Filed by Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jan. 7, 2021, PCT No. PCT/CN2021/070662
§ 371(c)(1), (2) Date Feb. 24, 2022,
PCT Pub. No. WO2021/139725, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 202010026691.8 (CN), filed on Jan. 10, 2020.
Prior Publication US 2022/0276490 A1, Sep. 1, 2022
Int. Cl. G02B 27/01 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A near eye display apparatus, comprising:
a display screen, configured to display an image; and
an imaging system, arranged on a light emitting side of the display screen, configured to image the image displayed by the display screen at a position where a human eye is located, and comprising:
a biconvex lens, arranged on the light emitting side of the display screen, and configured to magnify the image displayed by the display screen;
a transflective plane mirror, arranged on a side of the biconvex lens facing away from the display screen, and configured to receive an imaging light from the biconvex lens and reflect the imaging light; wherein a line connecting an optical center of the transflective plane mirror with an optical center of the biconvex lens is a first connecting line; and
a transflective curved mirror, arranged on a reflected optical path of the transflective plane mirror, and configured to converge the imaging light and reflect the converged imaging light to the position where the human eye is located through the transflective plane mirror; wherein a line connecting an optical center of the transflective curved mirror with the optical center of the transflective plane mirror is a second connecting line, and the first connecting line intersects the second connecting line;
wherein two optical surfaces of the biconvex lens are spherical surfaces, odd aspheric surfaces, even aspheric surfaces or free-form surfaces;
both the two optical surfaces of the biconvex lens satisfy following relation:

OG Complex Work Unit Math
wherein z represents a surface type equation of the optical surface, c represents a radius of curvature, k represents a quadratic surface coefficient, r represents a half-aperture diameter, and α1, α2, α3, α4, and α5 represent coefficients;
an optical surface, close to the display screen, of the biconvex lens satisfies:
r=−49.00863899098125 mm;
k=−95.04941082200814;
α1=0;
α2=−1.037904547482000×10−6;
α3=−1.752251362999443×10−8;
α4=7.636861093444737×10−11; and
α5=−4.351559618685465×10−13; and
an optical surface, facing away from the display screen, of the biconvex lens satisfies:
r=14.05871803442135 mm;
k=−1.367399296176254;
α1=0;
α2=−6.706673225527226×10−5;
α3=8.892596162790160×10−7;
α4=2.719516289317158×10−9; and
α5=−2.562235658581397×10−11.