US 12,007,646 B2
LED display device
Chong-Yu Wang, Hsinchu (TW); Ching-Tai Cheng, Hsinchu (TW); and Wei-Shan Hu, Hsinchu (TW)
Assigned to EPISTAR CORPORATION, Hsinchu (TW); and YENRICH TECHNOLOGY CORPORATION, Hsinchu (TW)
Filed by EPISTAR CORPORATION, Hsinchu (TW); and Yenrich Technology Corporation, Hsinchu (TW)
Filed on Nov. 17, 2022, as Appl. No. 17/989,578.
Claims priority of application No. 110143143 (TW), filed on Nov. 19, 2021.
Prior Publication US 2023/0161196 A1, May 25, 2023
Int. Cl. G02F 1/13357 (2006.01); H01L 25/075 (2006.01); H01L 25/13 (2006.01); H01L 33/60 (2010.01)
CPC G02F 1/133605 (2013.01) [G02F 1/133603 (2013.01); H01L 25/0753 (2013.01); H01L 25/13 (2013.01); H01L 33/60 (2013.01); H01L 2933/0091 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display device, comprising:
a first light-emitting module, comprising a first substrate, a plurality of first LED dies disposed on the first substrate, a first reflective layer on the first substrate, and a first light-transmissive layer covering the first substrate, the plurality of first LED dies, and the first reflective layer; and
a second light-emitting module, comprising a second substrate, a plurality of second LED dies disposed on the second substrate, a second reflective layer on the second substrate, and a second light-transmissive layer covering the second substrate, the plurality of second LED dies, and the second reflective layer,
wherein the first light-transmissive layer has a first rough uppermost surface, and the second light-transmissive layer has a second rough uppermost surface,
wherein the first light-emitting module has a first reflectivity, the second light-emitting module has a second reflectivity, and a standard deviation between the first reflectivity and the second reflectivity is not greater than 0.5,
wherein the first light-emitting module and the second light-emitting module have a splicing position between thereof,
wherein the first light-transmissive layer is directly attached to the plurality of first LED dies and the first reflective layer, and the second light-transmissive layer is directly attached to the plurality of second LED dies and the second reflective layer, and
wherein the first rough uppermost surface and the second rough uppermost surface have different roughnesses.