US 10,890,700 B2
Electronic devices having infrared-transparent antireflection coatings
Stephen C. Cool, San Jose, CA (US); Li Zhang, Mountain View, CA (US); Avery P. Yuen, San Jose, CA (US); and Kristina A. Babiarz, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 10, 2019, as Appl. No. 16/566,627.
Claims priority of provisional application 62/735,479, filed on Sep. 24, 2018.
Prior Publication US 2020/0096686 A1, Mar. 26, 2020
Int. Cl. G02B 5/20 (2006.01); G02B 5/28 (2006.01); G02B 1/115 (2015.01)
CPC G02B 5/208 (2013.01) [G02B 1/115 (2013.01); G02B 5/207 (2013.01); G02B 5/281 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a housing;
a display in the housing having a display cover layer and an array of pixels configured to emit visible light through the display cover layer;
an infrared light emitting component in the housing that is configured to emit infrared light through the display cover layer; and
a coating on the display cover layer that overlaps the array of pixels in a direction normal to the array of pixels and that comprises a stack of thin-film interference filter layers including alternating lower refractive index layers and higher refractive index layers, wherein the coating has a total thickness of 300-700 nm and is configured to exhibit a photopic reflectance of less than 1.5% and an infrared transmittance of greater than 94%.