US 12,487,382 B2
Wearable display device
Jian Gao, Beijing (CN); and Wenji Zhu, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/781,911
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed May 7, 2021, PCT No. PCT/CN2021/092181
§ 371(c)(1), (2) Date Jun. 2, 2022,
PCT Pub. No. WO2022/077898, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 202011089667.5 (CN), filed on Oct. 13, 2020.
Prior Publication US 2023/0236344 A1, Jul. 27, 2023
Int. Cl. G02B 5/18 (2006.01); G09F 9/30 (2006.01)
CPC G02B 5/1842 (2013.01) [G02B 5/18 (2013.01); G09F 9/30 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wearable display device, comprising:
a display panel comprising a plurality of pixel island groups arranged along a first direction, wherein each of the plurality of pixel island groups comprises a plurality of pixel islands arranged along a second direction, each of the plurality of pixel islands comprising a plurality of sub-pixels arranged along the first direction; and the second direction is intersected with the first direction; and
a slit grating disposed on a light-exiting side of the display panel, wherein the slit grating comprises a plurality of slits arranged along the first direction and extending along the second direction, each of the slits being configured to exit rays emitted by the sub-pixels in at least one of the plurality of pixel island groups,
wherein a distance W between the display panel and a viewing face satisfies:

OG Complex Work Unit Math
wherein y represents a length of each of the pixel islands along the first direction, g represents a length of a non-light emitting region between two adjacent pixel island groups along the first direction, and N represents a number of sub-pixels in each of the pixel islands; and the viewing face is disposed on a side, distal from the display panel, of the slit grating, and is a face on which eyes of a user wearing the wearable display device are located.