Organic EL display device
View Patent ↗An organic EL display device includes a thin film transistor substrate in which a light-emitting element is provided for each of plural sub-pixels constituting each pixel, a counter substrate provided with a coupled color filter which is a color filter arranged to be extended over plural adjacent sub-pixels and allowing light in one wavelength region to pass through and a light-shielding film which is arranged on a boundary between adjacent color filters to allow lights in different wavelength regions to pass through and shields light, a filler arranged between the thin film transistor substrate and the counter substrate and made of a transparent organic material, and a filler thickness adjustment part which adjusts to cause a thickness of the filler in a region where the light-shielding film is provided to be thinner than a thickness of the filler in a region where the light-emitting element is provided.
1. An organic EL display device comprising:
a thin film transistor substrate in which a light-emitting element is provided for each of a plurality of sub-pixels constituting each pixel on a transparent insulation substrate;
a counter substrate provided with, on a transparent insulation substrate, a color filter layer comprising color filters, some of the color filters constituting a coupled color filter which is a color filter arranged to be extended over adjacent two or more of the sub-pixels and allowing light in one wavelength region to pass through, the counter substrate further provided with a light-shielding film which is arranged on a boundary between adjacent two of the color filters to allow lights in different wavelength regions to pass through and shields light;
a filler arranged between the thin film transistor substrate and the counter substrate and made of a transparent organic material; and
a filler thickness adjustment part which adjusts to cause a thickness of the filler in a region where the light-shielding film is provided to be thinner than a thickness of the filler in a region where the light-emitting element is provided,
wherein the color filter layer has a first portion where the light-shielding film overlaps with the color filters and a second portion where the light-shielding film does not overlap with the color filters, and the first portion is closer to the light-emitting element than the second portion.
2. The organic EL display device according to claim 1 , wherein the filler thickness adjustment part is a columnar spacer arranged in the filler.
3. The organic EL display device according to claim 1 , wherein the filler thickness adjustment part is a film provided on the counter substrate and provided on the boundary between the adjacent two of the color filters to allow the lights in the different wavelength regions.
4. The organic EL display device according to claim 1 , wherein the coupled color filter is provided over four of the sub-pixels sharing one corner part.
5. The organic EL display device according to claim 1 , wherein the sub-pixel emits light of one of R (Red), G (Green), B (Blue) and W (White) and four sub-pixels to emit lights of R (Red), G (Green), B (Blue) and W (White) constitute one pixel.
6. The organic EL display device according to claim 1 , wherein the first portion has uniformity in thickness which is equal to a thickness of the second portion.