Flexible multilayer cover lens laminate for foldable displays

Abstract

To provide an improved display cover lens for flexible or foldable displays. [Solution] The embodiments described herein generally relate to flexible or foldable display devices, and more specifically to flexible cover lens assemblies. In one or more embodiments, the flexible cover lens assembly includes a glass layer, an adhesion promoter layer disposed on the glass layer, a dry hard coat layer disposed on the adhesion promoter layer having a nanoindentation hardness in the range of about 1 GPa to about 5 GPa, and an anti-fingerprint coating layer disposed on the dry hard coat layer. [Effect] When repeatedly bent and folded, damage due to cracking or delamination is avoided.

Claims

1. A glass layer, A bonding-promoting layer disposed on the glass layer, A dry hard coat layer having a nanoindentation hardness in the range of approximately 1 GPa to approximately 5 GPa, disposed on the adhesion promoting layer, A fingerprint-resistant coating layer disposed on the dry hard coat layer, A flexible cover lens assembly, including the above.

2. The flexible cover lens assembly according to claim 1, wherein the flexible cover lens assembly has a critical strain of 1% to about 15%.

3. The flexible cover lens assembly according to claim 2, further comprising a substrate disposed between the glass layer and the adhesion promoting layer.

4. The flexible cover lens assembly according to claim 3, further comprising a wet hard coat layer having a nanoindentation hardness in the range of about 0.4 GPa to about 1.5 GPa, wherein the wet hard coat layer is disposed between the substrate and the adhesion promoting layer.

5. The flexible cover lens assembly according to claim 1, wherein the glass layer is an ultrathin glass layer having a thickness in the range of about 20 μm to about 100 μm.

6. The flexible cover lens assembly according to claim 1, wherein the dry hard coat layer comprises a material selected from the group consisting of silicon oxide, silicon carbide, silicon oxycarbide, silicon nitride, silicon oxynitride, silicon oxycarbide nitride, dopants thereof, and any combination thereof.

7. The flexible cover lens assembly according to claim 1, wherein the dry hard coat layer is produced by a vapor deposition process and has a nanoindentation hardness in the range of about 1.5 GPa to about 4.5 GPa.

8. The flexible cover lens assembly according to claim 1, wherein the dry hard coat layer has a void ratio of about 1% to about 7%.

9. The flexible cover lens assembly according to claim 1, wherein the dry hard coat layer has a refractive index of about 1.42 to about 1.

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10. The flexible cover lens assembly according to claim 1, wherein the dry hard coat layer has a thickness in the range of about 0.5 μm to about 40 μm.

11. A glass layer, A substrate placed on the glass layer, A bonding-promoting layer disposed on the substrate, A dry hard coat layer having a void ratio of approximately 1% to approximately 7%, disposed on the adhesion promoting layer, A fingerprint-resistant coating layer disposed on the dry hard coat layer, A flexible cover lens assembly, including the above.

12. The flexible cover lens assembly according to claim 11, wherein the flexible cover lens assembly has a critical strain of 1% to about 15%.

13. A glass layer, A substrate placed on the glass layer, A wet hard coat layer disposed on the substrate having a nanoindentation hardness in the range of approximately 0.4 GPa to approximately 1.5 GPa, A bonding-promoting layer disposed on the wet hard coat layer, A dry hard coat layer is disposed on the adhesion promoting layer and has a nanoindentation hardness in the range of about 1 GPa to about 5 GPa and a porosity of about 1% to about 7%. A fingerprint-resistant coating layer disposed on the dry hard coat layer, A flexible cover lens assembly, including the above.

14. The flexible cover lens assembly according to claim 13, wherein the flexible cover lens assembly has a critical strain of 1% to about 15%.

15. The flexible cover lens assembly according to claim 13, wherein the dry hard coat layer comprises a material selected from the group consisting of silicon oxide, silicon carbide, silicon oxycarbide, silicon nitride, silicon oxynitride, silicon oxycarbide nitride, dopants thereof, and any combination thereof.

16. The flexible cover lens assembly according to claim 13, wherein the wet hard coat layer comprises an acrylate, a sol gel, a siloxane, a copolymer thereof, an elastomer thereof, or any combination thereof.

17. The flexible cover lens assembly according to claim 13, wherein the wet hard coat layer comprises an acrylate, the acrylate comprising a radiation-curable acrylate, an aliphatic urethane acrylate, a copolymer thereof, an elastomer thereof, or any combination thereof.

18. The flexible cover lens assembly according to claim 13, wherein the wet hard coat layer has a void ratio of about 6% to about 10%.

19. The flexible cover lens assembly according to claim 13, wherein the wet hard coat layer has a refractive index of about 1.40 to about 1.

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20. The flexible cover lens assembly according to claim 13, wherein the wet hard coat layer has a nanoindentation hardness in the range of about 0.5 GPa to about 1.2 GPa, and the wet hard coat layer has a thickness in the range of about 0.5 μm to about 40 μm.

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