US 12,411,270 B2
Optical diffuser
Simon Guillaumet, Grenoble (FR); Benjamin Vianne, Le Cheylas (FR); and Stephane Zoll, Froges (FR)
Assigned to STMicroelectronics (Crolles 2) SAS, Crolles (FR)
Filed by STMicroelectronics (Crolles 2) SAS, Crolles (FR)
Filed on Aug. 17, 2022, as Appl. No. 17/890,113.
Claims priority of application No. 2108931 (FR), filed on Aug. 26, 2021.
Prior Publication US 2023/0068198 A1, Mar. 2, 2023
Int. Cl. G02B 5/02 (2006.01)
CPC G02B 5/0278 (2013.01) [G02B 5/0242 (2013.01); G02B 5/0268 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical diffuser comprising:
a first layer having an electrically-conductive track; and
a second layer, said first layer being on the second layer, the second layer having at least two electrically-conductive pillars extending across the entire thickness of said second layer, the second layer including at least one first region that is located under said conductive track and that includes no pillar.