US 12,235,477 B2
Deadfront configured for color matching
Antoine Daniel Lesuffleur, Fontainebleau (FR); Xu Ouyang, Painted Post, NY (US); and Yawei Sun, Elmira, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/259,745
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Jul. 3, 2019, PCT No. PCT/US2019/040485
§ 371(c)(1), (2) Date Jan. 12, 2021,
PCT Pub. No. WO2020/014064, PCT Pub. Date Jan. 16, 2020.
Claims priority of provisional application 62/696,967, filed on Jul. 12, 2018.
Prior Publication US 2021/0181392 A1, Jun. 17, 2021
Int. Cl. G02B 5/20 (2006.01); B60K 35/00 (2006.01); G02B 1/115 (2015.01); B60K 35/22 (2024.01); B60K 35/40 (2024.01)
CPC G02B 5/205 (2013.01) [B60K 35/00 (2013.01); G02B 1/115 (2013.01); B60K 35/22 (2024.01); B60K 35/425 (2024.01); B60K 2360/25 (2024.01); B60K 2360/28 (2024.01)] 19 Claims
OG exemplary drawing
 
1. A deadfront configured to hide a display when the display is not active, the deadfront comprising:
a substrate having a first major surface and a second major surface, the second major surface being opposite the first major surface;
a neutral density filter disposed on the second major surface of the substrate; and
an ink layer disposed on the neutral density filter;
wherein the ink layer defines at least one display region in which the deadfront transmits at least 60% of incident light and at least one non-display region in which the deadfront transmits at most 5% of incident light;
wherein the ink layer reflects light incident on an interface between the ink layer and the neutral density filter through the first major surface such that a contrast sensitivity between each of the at least one display region and each of the at least one non-display region is at least 15 when the display is not active,
wherein the contrast sensitivity is calculated according to following formula:
CS≈RN+RI/|RD−RI|
where RN is a reflectance off the first major surface of the substrate, RI is a reflectance of the ink layer back through the first major surface, and RD is an internal reflectance of the display when the display is underlying the at least one display region,
wherein RI is between 0.1% to 5%.