US 12,013,609 B2
Displays with direct-lit backlight units
Daming Xu, Santa Clara, CA (US); Yufeng Yan, Santa Clara, CA (US); Qingbing Wang, Campbell, CA (US); Chenhua You, San Jose, CA (US); Rong Liu, Sunnyvale, CA (US); Jun Qi, San Jose, CA (US); Zhenyue Luo, Campbell, CA (US); Mookyung Son, Cupertino, CA (US); and Victor H. Yin, Cupertino, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jan. 18, 2023, as Appl. No. 18/156,286.
Application 18/156,286 is a continuation of application No. 17/409,467, filed on Aug. 23, 2021, granted, now 11,592,706.
Claims priority of provisional application 63/175,716, filed on Apr. 16, 2021.
Claims priority of provisional application 63/175,723, filed on Apr. 16, 2021.
Claims priority of provisional application 63/175,730, filed on Apr. 16, 2021.
Prior Publication US 2023/0205002 A1, Jun. 29, 2023
Int. Cl. G02F 1/13357 (2006.01); G02F 1/1335 (2006.01)
CPC G02F 1/133603 (2013.01) [G02F 1/133606 (2013.01); G02F 1/133608 (2013.01); G02F 1/133611 (2013.01); G02F 1/133612 (2021.01); G02F 1/133614 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A display, comprising:
a printed circuit board; and
an array of light sources mounted on the printed circuit board, wherein the printed circuit board comprises:
a white core layer that has a reflectivity of more than 80%;
a first conductive layer on the white core layer; and
a white solder resist layer on the first conductive layer, wherein the white solder resist layer has a reflectivity of more than 80%.