US 12,265,219 B2
Head-up display having a large exit pupil
Houqiang Jiang, Shenzhen (CN); Tapani Kalervo Levola, Shenzhen (CN); and Yisheng Zhu, Shenzhen (CN)
Assigned to SHENZHEN QIZE TECHNOLOGY PARTNERSHIP (LIMITED PARTNERSHIP), Shenzhen (CN)
Filed by SHENZHEN QIZE TECHNOLOGY PARTNERSHIP (LIMITED PARTNERSHIP), Shenzhen (CN)
Filed on Mar. 15, 2022, as Appl. No. 17/694,704.
Claims priority of application No. 202210126091.8 (CN), filed on Feb. 10, 2022.
Prior Publication US 2023/0251485 A1, Aug. 10, 2023
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02B 27/00 (2006.01)
CPC G02B 27/0101 (2013.01) [G02B 6/005 (2013.01); G02B 27/0081 (2013.01); G02B 2027/0123 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display apparatus (500) for displaying a virtual image (VIMG1), the display apparatus (500) comprising an expander device (EPE1) to form light beams (B3P1,R, B3P2,R) of output light (OUT1) by expanding light beams (B0P1,R, B0P2,R) of input light (IN1), the expander device (EPE1) comprising a waveguide plate (SUB1), an in-coupling element (DOE1) to form guided light (B1) by coupling input light (IN1) into the waveguide plate (SUB1), and an out-coupling element (DOE3) to form output light (OUT1) by coupling the guided light (B1) out of the waveguide plate (SUB1), wherein the display apparatus (500) comprises a base (BASE1) and an actuating mechanism (MOTOR1) to cause rotary and/or oscillatory motion of the waveguide plate (SUB1) with respect to the base (BASE1);
wherein the actuating mechanism (MOTOR1) is arranged to rotate the expander device (EPE1) so that the rotation speed (fRPM) of the expander device (EPE1) is in the range of 5 to 200 revolutions per second.