Display device

Abstract

A display device including light emitting elements corresponding to respective colors disposed on a substrate. Each light emitting has a cavity structure in which a light emission functioning layer including a light emitting layer is held between a reflecting electrode and a semitransmitting electrode. A cavity order of at least the light emitting element adapted to resonate a light, having the shortest wavelength is 1, and a cavity order of each of other light emitting elements is 0. The light emission functioning layer except for the light emitting layer is common to the light emitting elements corresponding to the respective colors.

1 . A display device comprising:
 a substrate;   an insulating layer on the substrate, the insulating layer having concavities therein; and   a plurality of light emitting elements carried on the substrate, the light emitting elements being associated with a respective concavity in the insulating layer, one of the light emitting elements emitting light having a wavelength shorter than those of the lights emitted by other of the light emitting elements,   wherein,
 each of the light emitting elements has a respective portion of a light emission functioning layer within its respective concavity, each respective light emission functioning layer portion being held between a reflecting electrode and a semi-transmitting electrode, each respective light emission functioning layer portion including a respective light emitting layer, 
 a cavity order of at least one light emitting element is configured to resonate its light and is 1, 
 the one light emitting element has an adjusting layer in its respective light functioning layer portion to make the cavity order 1, and 
 the light emission functioning layer, except for the respective light emitting layers and the light adjusting layer, is common to all of the light emitting elements. 
   
     
     
         2 . The display device according to  claim 1 , comprising red, blue and green light emitting elements. 
     
     
         3 . A display device comprising:
 a substrate;   an insulating layer on the substrate, the insulating layer having concavities therein; and   at least first second and third light emitting elements carried on the substrate, the first, second and third light emitting elements emitting light having first, second and third wavelengths, respectively, the first wavelength being shorter than the second wavelength, the second wavelength being shorter than the third wavelength, the first, second and third light emitting elements being associated with a respective concavity in the insulating layer,   wherein,
 each of the light emitting elements has a cavity structure in which a respective portion of a light emission functioning layer is held within its respective concavity, each respective light emission functioning layer portion being held between a reflecting electrode and a semi-transmitting electrode, each respective light emission functioning layer portion including a respective light emitting layer, 
 a cavity order of at least the first light emitting element is configured to resonate its light and is 1, 
 at least the first light emitting element has an adjusting layer in its respective light functioning layer portion to make its cavity order 1, and 
 the light emission functioning layer, except for the respective light emitting layers and the light adjusting layer, is common to the first, second and third light emitting elements. 
   
     
     
         4 . The display device of  claim 4 , wherein at least two of the first, second and third light emitting elements have cavities the cavity order of which is 1 and both of which have adjusting layers to make their cavity orders 1. 
     
     
         5 . The display device of  claim 5 , wherein the light adjusting layers are a common layer between the at least two of the first, second and third light emitting elements.