Display unit

Abstract

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 cyan organic light emitting devices emitting cyan light and a plurality of magenta organic light emitting devices emitting magenta light and a color filter group that has a plurality of red filters transmitting red light, a plurality of green filters transmitting green light, and a plurality of blue filters transmitting blue light are sequentially layered over a substrate.   
     
     
         2 . The display unit according to  claim 1 , wherein the plurality of red filters are arranged so that the magenta light from the magenta organic light emitting device enters the plurality of red filters,
 the plurality of green filters are arranged so that the cyan light from the cyan organic light emitting device enters the plurality of green filters, and   the plurality of blue filters are arranged so that at least one of the cyan light from the cyan organic light emitting device and the magenta light from the magenta 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 has at least two of a plurality of cyan organic light emitting devices emitting cyan light, a plurality of magenta organic light emitting devices emitting magenta light, and a plurality of yellow organic light emitting devices emitting yellow light and a color filter group that has a plurality of red filters transmitting red light, a plurality of green filters transmitting green light, and a plurality of blue filters transmitting blue light are sequentially layered over a substrate.   
     
     
         4 . The display unit according to  claim 3 , wherein the plurality of red filters are arranged so that at least one of the magenta light from the magenta organic light emitting device and the yellow light from the yellow organic light emitting device enters the plurality of red filters,
 the plurality of green filters are arranged so that at least one of the cyan light from the cyan organic light emitting device and the yellow light from the yellow organic light emitting device enters the plurality of green filters, and   the plurality of blue filters are arranged so that at least one of the cyan light from the cyan organic light emitting device and the magenta light from the magenta organic light emitting device enters the plurality of blue filters.   
     
     
         5 . The display unit according to  claim 3 , wherein the cyan 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,
 the magenta 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, and   the yellow light has a fifth peak indicating the maximum value in the range from 500 nm to 580 nm both inclusive and a sixth peak indicating the maximum value in the range from 580 nm to 700 nm both inclusive in the intensity distribution, and the fifth peak or the sixth peak indicates the maximum intensity.   
     
     
         6 . The display unit according to  claim 3 , wherein all the cyan organic light emitting device, the magenta organic light emitting device, and the yellow organic light emitting device have a structure in which an anode, a first light emitting unit including a first hole transport layer, a red light emitting layer, a green light emitting layer, and a first electron transport layer sequentially from the anode side, a charge generation layer, a second light emitting unit including a second hole transport layer, a blue light emitting layer, and a second electron transport layer sequentially from the anode side, and a cathode are sequentially layered, and
 the first light emitting unit in the cyan organic light emitting device and the magenta organic light emitting device further includes a charge control layer between the red light emitting layer and the green light emitting layer.   
     
     
         7 . The display unit according to  claim 6 , wherein the charge control layer in the magenta 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 cyan 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.   
     
     
         8 . The display unit according to  claim 6 , wherein the charge control layer in the magenta organic light emitting device is made of a material shown in Chemical formula 3 or 8-quinolinol aluminum complex (Alq 3 ), and
 the charge control layer in the cyan organic light emitting device is made of a material shown in Chemical formula 4, 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)   
       
         
           
           
               
               
           
         
       
     
     
         9 . The display unit according to  claim 6 , wherein the charge generation layer injects electrons into the first light emitting unit and injects holes into the second light emitting unit. 
     
     
         10 . A display unit comprising:
 a multilayer structure in which a light emitting device group that respectively has a plurality of cyan organic light emitting devices emitting cyan light, a plurality of magenta organic light emitting devices emitting magenta light, and a plurality of red organic light emitting devices emitting red light and a color filter group that has a plurality of red filters transmitting the red light from the red organic light emitting device, a plurality of green filters transmitting green light contained in the cyan light from the cyan organic light emitting device, and a plurality of blue filters transmitting blue light contained in at least one of the cyan light from the cyan organic light emitting device and the magenta light from the magenta organic light emitting device are sequentially layered over a substrate.