US 12,233,635 B2
Fiber-reinforced films
William Riis Hamburgen, Palo Alto, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 16/624,021
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Dec. 20, 2018, PCT No. PCT/US2018/066768
§ 371(c)(1), (2) Date Dec. 18, 2019,
PCT Pub. No. WO2019/126481, PCT Pub. Date Jun. 27, 2019.
Claims priority of provisional application 62/608,251, filed on Dec. 20, 2017.
Prior Publication US 2020/0171784 A1, Jun. 4, 2020
Int. Cl. B32B 5/12 (2006.01); B32B 5/26 (2006.01); G06F 1/16 (2006.01); G09F 9/30 (2006.01)
CPC B32B 5/12 (2013.01) [B32B 5/26 (2013.01); G06F 1/1643 (2013.01); G06F 1/1652 (2013.01); G09F 9/301 (2013.01); B32B 2260/021 (2013.01); B32B 2262/105 (2013.01); B32B 2262/106 (2013.01); B32B 2307/546 (2013.01); B32B 2307/732 (2013.01); B32B 2457/206 (2013.01); B32B 2457/208 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A computing device comprising:
a foldable display;
a bend limit layer coupled to the foldable display, the bend limit layer configured to increase its stiffness non-linearly when the foldable display is bent to a radius of curvature less than a limit radius, the limit radius being less than 10 mm; and
a backing film coupled to the foldable display, the backing film including:
a first layer including a monolayer of unidirectional first fibers oriented in a first direction and embedded within the first layer, wherein the first layer has a thickness of less than 25 μm; and
a second layer bound to the first layer, the second layer including a monolayer of unidirectional second fibers oriented in a second direction and embedded within the second layer, wherein the first layer has a thickness of less than 25 μm, wherein the first direction is nonparallel to the second direction.