US 12,449,655 B2
Head-up display
Jisun Ahn, Seoul (KR); Dongwook Kim, Seoul (KR); Kwangwoo Kim, Seoul (KR); Seungsik Koh, Seoul (KR); Seonho Lee, Seoul (KR); and Bosun Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/577,865
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Dec. 8, 2022, PCT No. PCT/KR2022/019887
§ 371(c)(1), (2) Date Jan. 9, 2024,
PCT Pub. No. WO2024/122683, PCT Pub. Date Jun. 13, 2024.
Prior Publication US 2024/0264438 A1, Aug. 8, 2024
Int. Cl. G02B 27/01 (2006.01)
CPC G02B 27/0101 (2013.01) 5 Claims
OG exemplary drawing
 
1. A head-up display comprising:
a picture generation unit having an emission surface from which image light is emitted;
a half-wavelength phase retarder disposed to face a first area of the emission surface;
a first flat mirror configured to reflect image light emitted from a second area of the emission surface;
a second flat mirror configured to reflect image light emitted from the half-wavelength phase retarder;
a concave mirror configured to reflect each of the image light reflected by the first flat mirror and the image light reflected by the second flat mirror to a window shield;
a tilting mechanism connected to the picture generation unit and configured to tilt an angle of the picture generation unit; and
a polarizer glass through which image light directed toward the first flat mirror and image light directed toward the second flat mirror are transmitted;
wherein the half-wavelength phase retarder is disposed on the emission surface of the picture generation unit,
wherein one surface of the polarizer glass faces the half-wavelength phase retarder and the second area of the emission surface,
wherein the polarizer glass is disposed between the half-wavelength phase retarder and the second flat mirror and between the second area and the first flat mirror.