Display unit including a multlayer structure
View Patent ↗A display unit that secures favorable display performance and has a simple structure is provided. The display unit includes a multilayer structure in which an organic light emitting device group respectively having a plurality of organic light emitting devices that emits cyan light and a plurality of organic light emitting devices that emits magenta light and a color filter group having a plurality of blue filters that transmit blue light and a plurality of yellow filters that transmit yellow light are sequentially layered. In the display unit, the cyan light and the magenta light entering from the organic light emitting device group to the color filter group is converted to blue light by the blue filter, and is respectively converted to green light and red light by the yellow filter. Therefore, compared to a case that the organic light emitting device group emits white light, color separation is more facilitated.
1. A display unit comprising:
a multilayer structure in which a light emitting device group that respectively has a plurality of first organic light emitting devices emitting a first light and a plurality of second organic light emitting devices emitting a second light and a color filter group that has a plurality of blue filters transmitting blue light and a plurality of yellow filters transmitting yellow light are sequentially layered over a substrate;
wherein the first light has a first peak indicating the maximum value in the range from 400 nm to 500 nm both inclusive and a second peak indicating the maximum value in the range from 500 nm to 580 nm both inclusive in the intensity distribution and the first peak or the second peak indicates the maximum intensity, and
the second light has a third peak indicating the maximum value in the range from 400 nm to 500 nm both inclusive and a fourth peak indicating the maximum value in the range from 600 nm to 700 nm both inclusive in the intensity distribution, and the third peak or the fourth peak indicates the maximum intensity.
2. The display unit according to claim 1 , wherein the plurality of yellow filters are arranged so that the first light from the first organic light emitting device enters part of the plurality of yellow filters and the second light from the second organic light emitting device enters the other part of the plurality of yellow filters, and
the plurality of blue filters are arranged so that at least one of the first light from the first organic light emitting device and the second light from the second organic light emitting device enters the plurality of blue filters.
3. A display unit comprising: a multilayer structure in which a light emitting device group that respectively has a plurality of first organic light emitting devices emitting a first light and a plurality of second organic light emitting devices emitting a second light and a color filter group that has a plurality of blue filters transmitting blue light and a plurality of yellow filters transmitting yellow light are sequentially layered over a substrate, wherein both the first organic light emitting device and the second organic light emitting device have a sequentially layered structure that comprises: first electrode layer, a first light emitting unit including a first light emitting layer and a second light emitting layer that each emit a color of light different from each other, a charge generation layer, and a second light emitting unit including a third light emitting layer that emits a color of light different from the color light of the first light emitting layer and the second light emitting layer.
4. The display unit according to claim 3 , wherein the first electrode layer is an anode,
a second electrode layer is a cathode,
the first light emitting unit includes a first hole transport layer, a red light emitting layer as the first light emitting layer, a charge control layer, a green light emitting layer as the second light emitting layer, and a first electron transport layer sequentially from the first electrode layer side, and
the second light emitting unit includes a second hole transport layer, a blue light emitting layer as the third light emitting layer, and a second electron transport layer sequentially from the first electrode layer side.
5. The display unit according to claim 4 , wherein the charge control layer in the second organic light emitting device is made of a material that promotes injection of electrons into the red light emitting layer and prevents injection of holes into the green light emitting layer, and
the charge control layer in the first organic light emitting device is made of a material that promotes injection of holes into the green light emitting layer and prevents injection of electrons into the red light emitting layer.
6. The display unit according to claim 4 , wherein the charge control layer in the second organic light emitting device is made of a material shown in Chemical formula 1 or 8-quinolinol aluminum complex (Alq 3 ), and
the charge control layer in the first organic light emitting device is made of a material shown in Chemical formula 2, bis[(N-naphthyl)-N-phenyl]benzidine (α-NPD), 4,4′,4″-tris (3-methylphenylphenylamino)triphenyl amine (m-MTDATA) or 4,4′,4″-tris(2-naphthylphenylamino)triphenyl amine (2-TNATA),
7. The display unit according to claim 3 , wherein the charge generation layer injects electrons into the first light emitting unit and injects holes into the second light emitting unit.