Display device with adhesive layer and resin layer and manufacturing method therefor
View Patent ↗A touch-sensor-equipped display device includes a touch sensor 10 , a transparent substrate 1 , an image-display body 2 , an adhesive layer formed of a thermal adhesive film 5 , and a resin layer 3 . The touch sensor 10 includes a first conductive layer 12 A composed of a plurality of first electric conductors 13 A, a second conductive layer 12 B composed of a plurality of second electric conductors 13 B, and at least one support film 11 . The plurality of first electric conductors 13 A extend in a different direction from a direction in which the plurality of second electric conductor 13 B extend. The thermal adhesive film 5 bonds the at least one support film 11 and the transparent substrate 1 . The resin layer 3 is disposed between the touch sensor 10 and the image-display body 2 and is made of a photo-curable resin.
1. A touch-sensor-equipped display device comprising:
a touch sensor comprising:
a first conductive layer composed of a plurality of first electric conductors that are arranged in parallel and extend in a belt like manner;
a second conductive layer composed of a plurality of second electric conductors that are arranged in parallel and extend in a belt like manner in a direction that is different from a direction in which the plurality of the first electric conductors extend; and
at least one support film;
a transparent substrate that supports the touch sensor;
an image-display body that is disposed on an opposite side of the touch sensor from the transparent substrate;
an adhesive layer formed of a thermal adhesive film that bonds the at least one support film and the transparent substrate and is made of a thermoplastic resin; and
a resin layer that is disposed between the touch sensor and the image-display body and is made of a photo-curable resin which is curable with light having a wavelength of larger than or equal to 390 nm and smaller than or equal to 410 nm,
the thermal adhesive film having optical transmittance of 10% or less at a wavelength of 365 nm and optical transmittance of 50% or more at a wavelength of 395 nm.
2. The touch-sensor-equipped display device according to claim 1 , wherein the thermal adhesive film comprises at least one of an ethylene-vinyl acetate copolymer and polyvinyl butyral as a main component and an ultraviolet absorbent.
3. The touch-sensor-equipped display device according to claim 1 ,
wherein the touch sensor comprises, as the support film, a first support film that supports the first conductive layer and a second support film that supports the second conductive layer, and
the first support film and the second support film are bonded by the thermal adhesive film.
4. The touch-sensor-equipped display device according to claim 1 , wherein each electric conductor of the first electric conductors and the second electric conductors is composed of copper thin lines formed in a pattern that allows light to pass through between the copper thin lines.
5. A touch-sensor-equipped display device manufacturing method comprising:
a support film disposition step in which at least one support film is disposed on a transparent substrate with a thermal adhesive film which is made of a thermoplastic resin being located between the support film and the transparent substrate in an overlaid manner, the at least one support film supporting a first conductive layer composed of a plurality of first electric conductors that are arranged in parallel and extend in a belt like manner, and a second conductive layer composed of a plurality of second electric conductors that are arranged in parallel and extend in a belt like manner in a direction that is different from a direction in which the plurality of first electric conductors extend;
a bonding step in which the transparent substrate and the at least one support film are bonded by heating and pressurization; and
a resin curing step in which the transparent substrate and an image-display body are stacked with a photo-curable resin located between the transparent substrate and the image-display body, and the photo-curable resin is cured by being provided with light from a transparent substrate side,
the thermal adhesive film having optical transmittance of 10% or less at a wavelength of 365 nm and optical transmittance of 50% or more at a wavelength of 395 nm, and
the light that irradiates in the resin curing step having a peak wavelength of 390 to 410 nm.
6. The touch-sensor-equipped display device manufacturing method according to claim 5 ,
wherein the thermal adhesive film comprises at least one of an ethylene-vinyl acetate copolymer and polyvinyl butyral as a main component and an ultraviolet absorbent.