Color conversion filter substrate and organic multicolor light emitting device
View Patent ↗A color conversion filter substrate includes a transparent support substrate, at least one color conversion filter layer formed of a resin film containing a fluorescence colorant with a thickness of at least 5 μm and arranged on the support substrate in a desired pattern, and a transparent gas-barrier layer formed in a flat film for covering the color conversion layer. The gas-barrier layer has a water-vapor permeability of 1.0 g/m 2 ·24 hr or less, and a portion covering the color conversion filter layer with a thickness t PL expressed by the following equation, 0<t PL <0.1 W wherein W is a minimum width of a pixel.
1. A color conversion filter substrate, comprising:
a transparent support substrate,
at least one color conversion filter layer formed on the support substrate in a pattern and formed of a resin film containing a fluorescence colorant, and
a gas-barrier layer formed of a transparent film for covering in a flat form the at least one color conversion layer and a surface of the transparent support substrate on which the color conversion layer is formed, said gas-barrier layer having a water-vapor permeability of equal to or less than 1.0 g/m 2 ·24 hr and having a portion on the color conversion filter layer with a thickness t PL defined by:
0<t PL <0.1 W
wherein W is a minimum width of the at least one color conversion filter layer.
2. A color conversion filter substrate according to claim 1 , wherein said gas-barrier layer has a laminate structure formed of at least first and second layers made of different materials.
3. A color conversion filter substrate according to claim 1 , wherein said minimum width of the at least one color conversion filter layer is a minimum width of the pattern of the color conversion filter layer.
4. An organic multicolor light-emitting display device comprising: the color conversion filter substrate according to claim 1 , a transparent electrode layer formed on the gas-barrier layer on the color conversion filter substrate at at least one electrically independent area, and an organic light-emitting layer formed on the transparent electrode layer so that when an electric signal is sent to the transparent electrode layer, the organic light-emitting layer emits light to the color conversion filter layer through the gas-barrier layer, thereby inducing fluorescent-light emission of the organic fluorescent colorant in the color conversion filter layer for allowing the organic multicolor light-emitting display device to display a predetermined color through the support substrate.
5. An organic multicolor light-emitting display device according to claim 4 , wherein said gas-barrier layer has a laminate structure formed of at least first and second layers made of different materials.