Organic electroluminescent display device
View Patent ↗An organic electroluminescent display device which satisfies all of chromatic purity, transmission factor, reduction in reflection, and reflected color in balance at low cost is provided. An organic electroluminescent (EL) display device includes: a main substrate; an organic light-emitting layer formed above the main substrate and including a red light-emitting layer which emits red light, a green light-emitting layer which emits green light, a blue light-emitting layer which emits blue light, and a bank which is a non-light emitting region; a first light-adjusting layer formed above the blue light-emitting layer and the bank, which selectively transmits the blue light and selectively absorbs the green light and the red light; and a second light-adjusting layer formed above the red light-emitting layer and the green light-emitting layer, which selectively absorbs the blue light and selectively transmits the green light and the red light.
1. An organic electroluminescent (EL) display device comprising:
a first substrate;
an organic EL unit formed above the first substrate and including a red light-emitting region which emits red light, a green light-emitting region which emits green light, a blue light-emitting region which emits blue light, and a non-light emitting region;
a first light-adjusting layer formed above the blue light-emitting region and the non-light emitting region, which selectively transmits the blue light and selectively absorbs the green light and the red light;
a second light-adjusting layer formed above the red light-emitting region and the green light-emitting region, which selectively absorbs the blue light and selectively transmits the green light and the red light; and
a third light-adjusting layer provided above the organic EL unit,
wherein the third light-adjusting layer has an absorption peak with a local maximum absorption wavelength in a range between 520 and 600 nm, and a full width at half maximum of the absorption peak is 100 nm or smaller.
2. The organic electroluminescent display device according to claim 1 ,
wherein the second light-adjusting layer is also provided above the non-light emitting region.
3. The organic electroluminescent display device according to claim 2 ,
wherein a region above the non-light emitting region and in which the first light-adjusting layer and the second light-adjusting layer are formed has a transmission property for transmitting light having a wavelength intermediate between the blue light and the green light.
4. The organic electroluminescent display device according to claim 1 ,
wherein the second light-adjusting layer has an absorption peak with a local maximum absorption wavelength in a range between 520 and 600 nm, and
a full width at half maximum of the absorption peak is 100 nm or smaller.
5. The organic electroluminescent display device according to claim 1 , further comprising
a second substrate which is different from the first substrate,
wherein the first light-adjusting layer is formed above the second substrate, and
the first substrate and the second substrate are arranged such that the first light-adjusting layer and the organic EL unit face each other.
6. The organic electroluminescent display device according to claim 5 ,
wherein the third light-adjusting layer is the second substrate made of colored glass or plastic.
7. The organic electroluminescent display device according to claim 5 , further comprising
one of an antireflection film and an antiglare film,
wherein the third light-adjusting layer is a colored resin layer, and
the one of the antireflection film and the antiglare film and the second substrate are bonded by the third light-adjusting layer.
8. The organic electroluminescent display device according to claim 1 ,
wherein the third light-adjusting layer is a colored phase difference film, a colored polarizer film, a colored antireflection film, or a colored antiglare film.
9. The organic electroluminescent display device according to claim 1 ,
wherein the organic EL unit, the first light-adjusting layer, and the third light-adjusting layer are stacked in this order.
10. The organic electroluminescent display device according to claim 1 ,
wherein the organic EL unit, the third light-adjusting layer, and the first light-adjusting layer are stacked in this order.
11. The organic electroluminescent display device according to claim 1 , further comprising
a second substrate which is different from the first substrate,
wherein the first light-adjusting layer and the third light-adjusting layer are formed on the second substrate in this order, and
the first substrate and the second substrate are arranged such that the first light-adjusting layer and the organic EL unit face each other.
12. The organic electroluminescent display device according to claim 1 , further comprising
a second substrate which is different from the first substrate,
the third light-adjusting layer is a colored resin layer, and
the organic EL unit and the first light-adjusting layer are bonded by the third light-adjusting layer.
13. The organic electroluminescent display device according to claim 1 ,
wherein the first light-adjusting layer has a transmission peak with a local maximum wavelength in a range between 400 and 480 nm, and
a full width at half maximum of the transmission peak is 100 nm or smaller.
14. The organic electroluminescent display device according to claim 1 ,
wherein a wavelength of an absorption peak of the second light-adjusting layer is 500 nm or smaller, and a wavelength of a transmission peak of the second light-adjusting layer is 500 nm or greater.