Flexible display module, flexible display device and method for preparing the flexible display module
A flexible display module according to the present application includes a number of module material layers superposed; and at least one strain isolation layer disposed between the two adjacent the module material layers. The strain isolation layer includes a chamber and an elastic material layer surrounding an outer periphery of the chamber.
1. A flexible display module, comprising:
a plurality of overlapped module material layers that includes a flexible glass substrate, a touch layer, and a polarizer layer; and
at least one strain isolation layer disposed between the touch layer and the polarizer layer of the plurality of module material layers,
at least one strain isolation layer disposed between the polarizer layer and the flexible glass substrate of the plurality of module material layers,
wherein each of the at least one strain isolation layers comprises a chamber and an elastic material layer surrounding an outer periphery of the chamber,
wherein the strain isolation layers reduce a strain between the plurality of module material layers,
wherein the elastic material layer has a first elastic modulus less than 10 kPa, and the flexible glass substrate has a second elastic modulus, and
wherein the second elastic modulus is at least 10 6 times higher than the first elastic modulus;
wherein a top surface of the chamber is formed as a bottom surface of a second module material layer of two adjacent module material layers, and a bottom surface of the chamber is formed as a top surface of a first module material layer of the two adjacent module material layers and wherein the elastic modulus of the elastic material layer is less than that of the first module material layer and the second module material layer.
2. The flexible display module according to claim 1 , wherein the plurality of the module material layers further comprise a flexible display screen body, wherein the plurality of the module material layers are overlapped one by one in sequence.
3. The flexible display module according to claim 1 , wherein the chamber is in a vacuum state.
4. The flexible display module according to claim 2 , wherein at least one of the module material layers comprises a flexible glass substrate, and the flexible display screen body is disposed on a first surface of the flexible glass substrate.
5. The flexible display module according to claim 4 , wherein an elastic modulus of the flexible glass substrate is not lower than 80 GPa, and/or, a thickness of the flexible glass substrate is from 25 μm to 100 μm.
6. The flexible display module according to claim 4 , further comprising:
a trace region disposed on a second surface of the flexible glass substrate and electrically connected to the flexible display screen body, wherein the first surface of the flexible glass substrate and the second surface of the flexible glass substrate are opposite to each other.
7. The flexible display module according to claim 6 , wherein the flexible glass substrate comprises a via hole, and a circuit trace in the trace region electrically connects the flexible display screen body to an external circuit via the via hole.
8. The flexible display module according to claim 1 , wherein an elastic modulus of the elastic material layer is lower than that of the two adjacent module material layers.
9. A flexible display device, comprising:
a flexible display module according to claim 1 ; and
a frame having a preset curved surface shape,
wherein the flexible display module is disposed in the frame, and the length of the inner periphery of the frame is less than the length of the outer periphery of the flexible display module.
10. The flexible display device according to claim 9 , wherein a surface of the inner periphery of the frame comprises an annular concave groove, and the frame is bonded to the outer periphery of the flexible display module in a frame-bonding manner.
11. The flexible display device according to claim 10 , wherein a depth of the annular concave groove is from 3 to 5 mm.
12. The flexible display device according to claim 10 , wherein a cross-sectional shape of the annular concave groove is one of an arc, a trapezoidal shape and a U-shape.
13. The flexible display module according to claim 1 , wherein the chamber is filled with gas.
14. The flexible display module according to claim 1 , wherein the chamber is filled with gas and silicone oil.