Touch panel and method for manufacturing touch panel
View Patent ↗A touch panel capable of performing display and sensing along a curved surface or a touch panel that maintains high detection sensitivity even when it is curved along a curved surface is provided. A flexible display panel is placed along a curved portion included in a surface of a support. A first film layer is attached along a surface of the display panel by a bonding layer. Second to n-th film layers (n is an integer of 2 or more) are sequentially attached along a surface of the first film layer by bonding layers. A flexible touch sensor is attached along a surface of the n-th film layer by a bonding layer.
1. A method for manufacturing a touch panel, comprising the steps of:
placing a display panel over a support so that the display panel is bent along a curved surface of the support;
attaching a first insulating film layer over the display panel so that the first insulating film layer is bent along a curved surface of the display panel;
attaching a second insulating film layer over the first insulating film layer so that the second insulating film layer is bent along a curved surface of the first insulating film layer; and
attaching a touch sensor over the second insulating film layer so that the touch sensor is bent along a curved surface of the second insulating film layer,
wherein the display panel and the first insulating film layer are attached through a first bonding layer,
wherein the first insulating film layer and the second insulating film layer are attached through a second bonding layer, and
wherein at least one of the first bonding layer and the second bonding layer comprises a light-scattering material.
2. The method for manufacturing a touch panel, according to claim 1 , wherein each of the first bonding layer and the second bonding layer comprises an acrylic resin, a urethane resin, an epoxy resin, a silicone resin, or a resin having a siloxane bond.
3. The method for manufacturing a touch panel, according to claim 1 , wherein the second insulating film layer and the touch sensor are attached through a third bonding layer.
4. The method for manufacturing a touch panel, according to claim 3 , wherein the third bonding layer comprises an acrylic resin, a urethane resin, an epoxy resin, a silicone resin, or a resin having a siloxane bond.
5. The method for manufacturing a touch panel, according to claim 1 , further comprising a step of attaching an exterior component over the touch sensor so that the exterior component is bent along a curved surface of the touch sensor.
6. The method for manufacturing a touch panel, according to claim 5 , wherein the exterior component is a different material from the first insulating film layer and the second insulating film layer.
7. The method for manufacturing a touch panel, according to claim 1 , further comprising a step of detaching the display panel from the support.
8. The method for manufacturing a touch panel, according to claim 1 , wherein the light-scattering material is one of titanium oxide, barium oxide, zeolite, and zirconium.
9. A touch panel comprising:
a display panel;
first to n-th insulating film layers over the display panel, where n is an integer of 2 or more; and
a touch sensor over the first to n-th insulating film layers,
wherein the touch panel comprises a curved surface,
wherein the curved surface is maintained even when the touch panel is not supported by a support,
wherein any adjacent two of the display panel, the first to n-th insulating film layers, and the touch sensor are attached to each other by a bonding layer, and
wherein the bonding layer comprises a light-scattering material.
10. The touch panel according to claim 9 ,
wherein the display panel has a thickness in the range of 1 μm to 300 μm,
wherein the touch sensor has a thickness in the range of 1 μm to 300 μm, and
wherein each of the first to n-th insulating film layers has a thickness in the range of 1 μm to 300 μm.
11. The touch panel according to claim 9 ,
wherein the bonding layer has a thickness in the range of 300 nm to 300 μm.
12. The touch panel according to claim 9 , wherein the light-scattering material is one of titanium oxide, barium oxide, zeolite, and zirconium.