US 12,411,365 B2
Quantum dot light diffuser plate and method for making the same
Chih Wen Yang, Taoyuan (TW); and Yu Wei Chang, Taoyuan (TW)
Assigned to ENTIRE TECHNOLOGY CO., LTD., Taoyuan (TW)
Filed by ENTIRE TECHNOLOGY CO., LTD., Taoyuan (TW)
Filed on Jul. 8, 2024, as Appl. No. 18/766,273.
Application 18/766,273 is a continuation of application No. 17/875,047, filed on Jul. 27, 2022, granted, now 12,066,697.
Claims priority of application No. 111101887 (TW), filed on Jan. 17, 2022.
Prior Publication US 2024/0361621 A1, Oct. 31, 2024
Int. Cl. G02F 1/017 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/01791 (2021.01) [G02F 1/133603 (2013.01); G02F 1/133606 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A quantum dot light diffuser plate capable of being assembled on a backlight module with a plurality of blue light emitting diodes (LEDs); the backlight module comprising a substrate and the blue LEDs arranged on the substrate in an array form; the quantum dot light diffuser plate being located above the substrate and comprising:
a plate body, having an upper surface and a lower surface; the lower surface facing the substrate;
a plurality of microstructures, formed on the upper surface of the plate body in an array form; the microstructures forming a plurality of convex portions and a plurality of concave portions on the upper surface of the plate body; the concave portions being separated by the convex portions, such that the concave parts are independent and not communicated with each other;
a quantum dot layer, disposed at the plurality of the concave portions on the upper surface of the plate body; wherein, a thickness of the quantum dot layer is t1, a distance from a top of the convex portions to a bottom of the concave portions is t2; wherein t1<t2; and
a water-blocking and gas-blocking layer, disposed on the upper surface of the plate body and covering the plurality of the convex portions and the quantum dot layer;
wherein, because the thickness t1 of the quantum dot layer is smaller than the distance t2 from the top of the convex portions to the bottom of the concave portions, the top of the convex portions is not disposed with the quantum dot layer; that is, the quantum dot layer located in the concave portions is separated by the convex portions of the microstructures into a plurality of small quantum-dot-layer parts independent of each other, and the small quantum-dot-layer parts separately located in different said concave portions are not connected to each other.