US 11,747,602 B2
Holographic display apparatus
Jiwon Lee, Yongin-si (KR); Youngchan Kim, Yongin-si (KR); Byungchoon Yang, Yongin-si (KR); Jaeho You, Yongin-si (KR); and Cheonmyeong Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Aug. 19, 2020, as Appl. No. 16/997,400.
Claims priority of application No. 10-2020-0007966 (KR), filed on Jan. 21, 2020.
Prior Publication US 2021/0223524 A1, Jul. 22, 2021
Int. Cl. G02B 19/00 (2006.01); F21V 8/00 (2006.01); G03H 1/22 (2006.01)
CPC G02B 19/0061 (2013.01) [G02B 6/003 (2013.01); G02B 6/005 (2013.01); G02B 19/0009 (2013.01); G03H 1/2286 (2013.01); G03H 1/2294 (2013.01); G03H 2001/2234 (2013.01); G03H 2222/12 (2013.01); G03H 2223/16 (2013.01); G03H 2225/22 (2013.01); G03H 2250/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A holographic display apparatus comprising:
a light source disposed on a printed circuit board;
a display panel diffracting light transferred from the light source;
an optical system that includes a collimation lens disposed between the light source and the display panel;
a condensing lens disposed between the light source and the optical system, and collecting the light transferred from the light source; and
a first mask disposed between the light source and the condensing lens, wherein
the optical system converts the light incident from the light source into a surface light source,
the condensing lens includes a lower portion having a guide protrusion,
the first mask includes a surface having a guide recess, and
the condensing lens and the first mask are aligned by inserting the guide protrusion into the guide recess.