Flat panel display device and manufacturing method for the same
View Patent ↗A flat panel display device comprises a substrate, an organic light emitting diode formed on the substrate, an inner stack encapsulating the light emitting diode and comprising at least one organic layer and one inorganic layer, and an outer stack deposited to cover the inner stack and comprising at least two polymer layers and an adhesive and bonding layer disposed therebetween to combine the at least two polymer layers and a polymer heat-curing film disposed at an interface of each of the polymer layers and the adhesive and bonding layer and cured by heat treatment. According to the present invention, the flat panel display device and a manufacturing method for the same reliably seals the organic light emitting device and prevents degradation by permeation of external harmful materials, while providing high flexibility and low manufacturing cost.
1. A flat panel display device comprising:
a substrate;
an organic light emitting diode formed on the substrate;
an inner stack encapsulating the light emitting diode and comprising at least one organic layer and one inorganic layer alternately stacked; and
an outer stack deposited to cover the inner stack and comprising at least two polymer layers and an adhesive and bonding layer disposed therebetween to combine the at least two polymer layers and a polymer heat-curing film disposed at an interface of the polymer layers and the adhesive and bonding layer and cured by heat treatment.
2. The flat panel display device of claim 1 , wherein the inner stack comprises an organic layer contacting the organic light emitting diode and an inorganic layer laminated onto the organic layer.
3. The flat panel display device of claim 1 , wherein the polymer layer and the adhesive and bonding layer are deposited respectively on a preceding layer of another polymer layer and the adhesive and bonding layer by a laminating process.
4. The flat panel display device of claim 3 , wherein the polymer layer and the adhesive and bonding layer are deposited on the preceding layer by spraying a raw material paste through a spray nozzle.
5. The flat panel display device of claim 3 , wherein the polymer layer and the adhesive and bonding layer are deposited on the preceding layer by screen printing.
6. The flat panel display device of claim 1 , wherein the polymer layer may be made of polyolefin or a blend of polyolefin and an additional element, or ethylene unsaturated ester copolymer, or polyethylene.
7. The flat panel display device of claim 1 , wherein the adhesive and bonding layer may be made of a mixture of polyester and nylon, and the adhesive and bonding layer and the polymer layer contacting each other are fused through heat treatment and bonded to each other.
8. The flat panel display device of claim 1 , wherein the polymer heat-curing film is formed by performing a corona discharge process on the polymer layer.
9. The flat panel display device of claim 1 , wherein the organic layer may be made of a polymeric resin material such as acrylic, methacrylic, polyester, PET, polyethylene, or polypropylene.
10. The flat panel display device of claim 1 , wherein the inorganic layer may be made of a ceramic material selected from In 2 O 3 , SnO 2 , ITO, SiO 2 , Al 2 O 3 , TiO 2 , AlN, SiN, SiC, or SiON.