US 12,407,799 B2
Projection apparatus
Yujie Wang, Beijing (CN); Site Cai, Beijing (CN); Guangquan Wang, Beijing (CN); Wei Zhang, Beijing (CN); Xi Li, Beijing (CN); Jingang Wang, Beijing (CN); Xiaolong Liu, Beijing (CN); and Chengwei Ji, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/921,392
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Feb. 28, 2022, PCT No. PCT/CN2022/078195
§ 371(c)(1), (2) Date Oct. 26, 2022,
PCT Pub. No. WO2023/159545, PCT Pub. Date Aug. 31, 2023.
Prior Publication US 2024/0388680 A1, Nov. 21, 2024
Int. Cl. H04N 9/31 (2006.01)
CPC H04N 9/3167 (2013.01) [H04N 9/317 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A projection apparatus, comprising:
a light source component;
a light polarization component located on a light exiting side of the light source component and configured to convert light emitted from the light source component into first polarized light polarized in a first polarization direction;
a display panel located on a side, away from the light source component, of the light polarization component and configured to adjust the polarization direction in which the first polarized light is polarized, so as to emit second polarized light; a polarization direction in which the second polarized light is polarized is between the first polarization direction and a second polarization direction, and the first polarization direction is perpendicular to the second polarization direction;
a light reflective component located on a side, away from the light polarization component, of the display panel and configured to reflect one of the polarized light polarized in the first polarization direction and the polarized light polarized in the second polarization direction; and
a projection lens, a light incident surface of which faces the light reflective component so as to receive the light reflected by the light reflective component, wherein
the light source component comprises a light source, a second reflective layer, and a second lens;
the second lens is arranged between the light source and the light polarization component and is configured to collimate light directly irradiated to the second lens by the light source, and the second lens comprises a Fresnel lens;
the second reflective layer is located between the light source and the second lens and is arranged surrounding an optical axis of the second lens to form a cylindrical structure having a first opening facing the light source and a second opening facing the second lens, and an area of the first opening is smaller than that of the second opening;
wherein, the light polarization component comprises:
a transflective component configured to transmit the polarized light polarized in the first polarization direction and reflect at least a part of the polarized light polarized in the second polarization direction.