US 12,366,754 B2
Display device, a vehicle with a display device and display virtual image method
Yisheng Zhu, Shenzhen (CN); Houqiang Jiang, Shenzhen (CN); and Tapani Kalervo Levola, Shenzhen (CN)
Assigned to Shenzhen Optiave Display Technology Co., Ltd., Shenzhen (CN)
Filed by Shenzhen Optiave Display Technology Co., Ltd., Shenzhen (CN)
Filed on Aug. 25, 2022, as Appl. No. 17/895,091.
Claims priority of application No. 202210844495.0 (CN), filed on Jul. 19, 2022.
Prior Publication US 2024/0027763 A1, Jan. 25, 2024
Int. Cl. G02B 6/00 (2006.01); F21V 8/00 (2006.01); G02B 26/08 (2006.01); G02B 27/01 (2006.01); B60K 35/00 (2006.01); B60K 35/23 (2024.01)
CPC G02B 27/0149 (2013.01) [G02B 6/0016 (2013.01); G02B 6/0038 (2013.01); G02B 26/08 (2013.01); G02B 27/0101 (2013.01); B60K 35/00 (2013.01); B60K 35/23 (2024.01); B60K 2360/31 (2024.01); G02B 2027/0154 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A display apparatus (500) for displaying a virtual image (VIMG1), the display apparatus (500) comprising:
an optical engine (ENG1) to form input light (IN1), which represents an input image (IMG0),
an expander device (EPE1) to form light beams (B3P0,R,B3P1,R) of output light (OUT1) by expanding light beams (B0P0,R,B0P1,R) of the input light (IN1),
the expander device (EPE1) comprising:
a waveguide plate (SUB1),
a diffractive in-coupling element (DOE1) to form first guided light (B1a) and second guided light (B1b) by coupling the input light (IN1) into the waveguide plate (SUB1),
a first out-coupling element (DOE3a) to form output light (OUT1) by coupling the first guided light (B1a) out of the waveguide plate (SUB1), and
a second out-coupling element (DOE3b) to form output light (OUT1) by coupling the second guided light (B1b) out of the waveguide plate (SUB1),
wherein the display apparatus (500) comprises a base (BASE1) and an actuating mechanism (MOTOR1) to cause rotary motion of the expander device (EPE1) with respect to the base (BASE1),
wherein an angle (γ1) between an optical axis (AX0) of the optical engine (ENG1) and the axis (AX1) of rotation of the expander device (EPE1) is in the range of 10° to 45°.