US 11,733,539 B2
Apparatus and method for displaying three-dimensional image
Jinho Lee, Suwon-si (KR); Elena Malinovskaya, Moscow (RU); Igor Yanusik, Moscow (RU); Dong Kyung Nam, Yongin-si (KR); and Yoonsun Choi, Yongin-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 12, 2019, as Appl. No. 16/681,406.
Claims priority of application No. 10-2018-0159967 (KR), filed on Dec. 12, 2018.
Prior Publication US 2020/0192109 A1, Jun. 18, 2020
Int. Cl. G02B 27/01 (2006.01); G02B 30/50 (2020.01); B60K 37/02 (2006.01)
CPC G02B 30/50 (2020.01) [B60K 37/02 (2013.01); G02B 27/0101 (2013.01); B60K 2370/1531 (2019.05); G02B 2027/014 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A three-dimensional (3D) display apparatus comprising:
an optical layer comprising a plurality of optical elements;
a projector configured to scan a plurality of color light onto the optical layer; and
a processor configured to
control a timing at which each of the plurality of color light is exclusively turned on by the projector to scan the plurality of color light onto the optical layer,
wherein the projector comprises at least one laser scanning module configured to scan a laser beam onto the optical layer,
wherein the at least one laser scanning module comprises:
a plurality of laser light sources configured to output laser beams corresponding to the plurality of color light;
a beam combiner configured to synthesize outputs of the plurality of laser light sources into a single integrated beam; and
a scanning mirror configured to control a direction of the single integrated beam to scan the single integrated beam onto the optical layer,
wherein the processor is further configured to:
generate a 3D image in a viewing space based on the timing at which the projector scans the plurality of color light onto the optical layer, by controlling the plurality of laser light sources based on a value of a scanned pixel corresponding to the timing at which the plurality of color light is scanned onto the optical layer, so that the 3D image and a scanning interval of the scanning mirror is synchronized to a different position of the optical layer in response to rotation of the scanning mirror,
wherein the optical layer comprises a holographic optical element (HOE) lens array provided on or inside a windshield of a vehicle, and
wherein the projector is further configured to scan a single integrated light, generated based on the plurality of color light, directly on the HOE lens array linearly in a first direction of the HOE lens array,
wherein the HOE lens array is coated with a dichroic optical coating layer having a transmittance which changes based on a wavelength of a visible light.