Patent ID: 7184191

Claim:
A display device comprising: a first substrate; first and second electrodes provided on said first substrate; a second substrate provided apart from said first substrate so as to make a space therebetween; a third electrode provided on said second substrate, opposing to said first and second electrodes; a first layer provided in the space at a location adjacent to said first and second electrodes, and containing therein a light emissive material which emits light through any one of electrochemical oxidation and reduction; a second layer provided in the space at a location adjacent to said third electrode, and containing a coloring material with color changeability through any one of electrochemical oxidation and reduction; and a third layer provided between said first and second layers and made of an electrolytic material having any one of non-transmissivity and transmission retardancy against any one of oxidation and reduction species of said light emissive material.