US 11,841,512 B2
Display device
Youngchan Kim, Seoul (KR); and Jongho Hong, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Oct. 22, 2020, as Appl. No. 17/077,347.
Claims priority of application No. 10-2020-0021802 (KR), filed on Feb. 21, 2020.
Prior Publication US 2021/0263324 A1, Aug. 26, 2021
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02B 27/10 (2006.01)
CPC G02B 27/0176 (2013.01) [G02B 6/0076 (2013.01); G02B 27/0172 (2013.01); G02B 27/102 (2013.01); G02B 2027/015 (2013.01); G02B 2027/0112 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of display units, wherein the display units generate a plurality of display light beams with different wavelengths, respectively, and each of the display units generates light beams of a single color; and
a light guide unit which receives the display light beams from the display units,
wherein the light guide unit includes:
a plurality of input diffraction regions which changes traveling directions of the display light beams, respectively;
a plurality of waveguides to which the display light beams are provided;
a plurality of input diffraction patterns disposed on the waveguides or disposed in the waveguides corresponding to the input diffraction regions, respectively, to change the traveling direction of the display light beams, wherein the input diffraction patterns do not overlap each other in a thickness direction of the waveguides;
a light guide area which guides the display light beams with the changed traveling directions; and
an output diffraction region which directs the guided display light beams to a predetermined direction,
wherein the plurality of input diffraction patterns overlap with the plurality of display units, respectively to receive the display light beams of the single color, respectively.