US 12,352,971 B2
Augmented reality display system and AR goggle
Ruimin Diao, Mianyang (CN); and Yao Chang Wang, Zhubei (TW)
Assigned to Sichuan Longhua Film Co., Ltd., Mianyang (CN)
Filed by Sichuan Longhua Film Co., Ltd., Mianyang (CN)
Filed on Apr. 19, 2022, as Appl. No. 17/724,471.
Claims priority of application No. 202111484446.2 (CN), filed on Dec. 7, 2021.
Prior Publication US 2023/0176381 A1, Jun. 8, 2023
Int. Cl. G02B 27/01 (2006.01); G02B 5/30 (2006.01); G02B 27/28 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 5/3016 (2013.01); G02B 5/3025 (2013.01); G02B 27/283 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An augmented reality display system, comprising: an image display, a linear polarization optical splitter, a phase delay sheet, a circular polarization optical reflector and a linear polarization absorption component, wherein the linear polarization optical splitter is arranged at an output end of the image display, the linear polarization optical splitter is configured to reflect light with a first linear polarization direction and allow light with a second linear polarization direction to pass therethrough, the phase delay sheet is arranged between the linear polarization optical splitter and the circular polarization optical reflector, the linear polarization absorption component is arranged on one side of the linear polarization optical splitter away from the phase delay sheet, and the linear polarization absorption component is configured to absorb light with the first linear polarization direction and allow light with the second linear polarization direction to pass therethrough, wherein
the image display is configured to provide a first image beam with the first linear polarization direction, and the first image beam is reflected by the linear polarization optical splitter to the phase delay sheet,
the phase delay sheet is configured to convert the first image beam into a second image beam with a first circular polarization direction, and the second image beam is transmitted to the circular polarization optical reflector,
the circular polarization optical reflector is configured to reflect the second image beam into a third image beam with a second circular polarization direction and reflect the third image beam back to the phase delay sheet, the phase delay sheet is further configured to convert the third image beam into a fourth image beam with the second linear polarization direction, the fourth image beam passes through the linear polarization optical splitter and the linear polarization absorption component to form a to-be-displayed image, and the circular polarization reflector reflects the second image beam into the third image beam with a reflectivity between 55% and 100%,
wherein the image display and the linear polarization optical splitter are arranged along a first direction, and the linear polarization optical splitter, the phase delay sheet and the circular polarization optical reflector are arranged along a second direction,
wherein a first external environment light enters the augmented reality display system from the first direction, part of the first external environment light with the first linear polarization direction is absorbed by the linear polarization absorption component, and part of the first external environment light with the second linear polarization direction sequentially passes through the linear polarization absorption component and the linear polarization optical splitter, is reflected by the image display back to the linear polarization optical splitter, and passes through the linear polarization optical splitter and the linear polarization absorption component.