Contact sensitive device, display apparatus including the same and method of manufacturing display apparatus
Provided is a contact sensitive device. The contact sensitive device includes an electroactive layer, a plurality of first electrodes, a plurality of second electrodes, and a bonding layer. The plurality of first electrodes is disposed on one surface of the electroactive layer and the plurality of second electrodes is disposed on the other surface of the electroactive layer. The bonding layer covers one surface of the electroactive layer and consists of a first part corresponding to the plurality of first electrodes and a second part excluding the first part. The first part and the second part of the bonding layer have different elastic moduli.
1. A contact sensitive device, comprising:
an electroactive layer;
a plurality of first electrodes on one surface of the electroactive layer;
a plurality of second electrodes on another surface of the electroactive layer; and
a bonding layer on the one surface of the electroactive layer, the bonding layer including a first part corresponding to the plurality of first electrodes and a second part excluding the first part,
wherein the first part and the second part have different elastic modulus.
2. The contact sensitive device according to claim 1 , wherein the first part and the second part are one continuous layer.
3. The contact sensitive device according to claim 1 , wherein an elastic modulus of the first part is higher than an elastic modulus of the second part.
4. The contact sensitive device according to claim 1 , wherein an elastic modulus of the first part is 20 to 500 times higher than an elastic modulus of the second part.
5. The contact sensitive device according to claim 1 , wherein an elastic modulus of the first part is 10 MPa to 60 MPa.
6. The contact sensitive device according to claim 5 , wherein an elastic modulus of the second part is 0.05 MPa to 0.50 MPa.
7. The contact sensitive device according to claim 6 , wherein a pencil hardness of the first part is 5B or higher and a pencil hardness of the second part is 3B or lower.
8. The contact sensitive device according to claim 1 , wherein the first part of the bonding layer corresponds to an overlapping area where the plurality of first electrodes and the plurality of second electrodes overlap with each other.
9. A display apparatus, comprising:
a display panel;
a contact sensitive device on the display panel, the contact sensitive device including an electroactive layer, a first electrode on one surface of the electroactive layer, and a bonding layer on the first electrode; and
a cover window on the contact sensitive device,
wherein the bonding layer includes a first part between the first electrode and the cover window and a second part between the one surface of the electroactive layer and the cover window, and
wherein the first part and the second part have different elastic moduli.
10. The display apparatus according to claim 9 , wherein an elastic modulus of the first part is higher than an elastic modulus of the second part.
11. The display apparatus according to claim 9 , wherein an elastic modulus of the first part is 20 to 500 times higher than an elastic modulus of the second part.
12. The display apparatus according to claim 9 , wherein an adhesive strength of the bonding layer is 4 N/cm 2 or higher.
13. The display apparatus according to claim 9 , wherein a thickness of the bonding layer is 20 μm to 100 μm.
14. The display apparatus according to claim 9 , further comprising:
a touch device between the contact sensitive device and the cover window, between the contact sensitive device and the display panel, or in the display panel.