US 12,340,740 B2
Method of aligning light emitting element and method of manufacturing display device
Joo Nyung Jang, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Oct. 18, 2023, as Appl. No. 18/489,049.
Claims priority of application No. 10-2023-0043717 (KR), filed on Apr. 3, 2023.
Prior Publication US 2024/0331625 A1, Oct. 3, 2024
Int. Cl. G09G 3/3225 (2016.01)
CPC G09G 3/3225 (2013.01) [G09G 2230/00 (2013.01); G09G 2300/0426 (2013.01); G09G 2330/028 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of aligning a light emitting element, the method comprising:
providing an ink on a substrate, the ink comprising a solvent and a plurality of light emitting elements in the solvent, a first electrode and a second electrode being disposed on the substrate and spaced apart from each other; and
aligning the light emitting elements in a same direction based on applying an alternating current (AC) voltage to the first electrode and the second electrode, wherein the AC voltage is controlled so that a maximum value of an output AC voltage between the first electrode and the second electrode is higher than a first threshold voltage and a minimum value of the output AC voltage has a magnitude higher than a second threshold voltage, and
the first threshold voltage and the second threshold voltage have a same magnitude and opposite polarities that cause a portion of the light emitting elements to switch from a first direction to the same direction.