Process for manufacturing a pixel of an organic-light-emitting-diode micro-display, comprising the following successive steps: a) providing a substrate comprising a structured first electrode; b) forming in succession first and second bilayer stacks (2, 3) on the structured first electrode, each bilayer stack (2, 3) comprising in succession first and second layers (20, 21; 30, 31) respectively made of first and second materials that are transparent conductive oxides able to be selectively etched; c) etching the second bilayer stack in a zone intended to accommodate a blue subpixel and in a zone intended to accommodate a green subpixel, the second bilayer stack being left intact under a zone intended to accommodate a red subpixel; d) etching the first bilayer stack in the zone intended to accommodate the blue subpixel, the first bilayer stack being left intact under the zone intended to accommodate the green subpixel; e) forming a stack of organic light-emitting layers, said stack being configured to emit white light and extending through the zones intended to accommodate the red, green and blue subpixels (PR, PV, PB); f) forming a second electrode on the stack of organic light-emitting layers so as to obtain an optical resonator with the first electrode; step b) being executed so that: - the first bilayer stack has a thickness chosen so that the optical resonator permits the transmission of green light, - the first and second bilayer stacks (2, 3) have a total thickness chosen so that the optical resonator permits the transmission of red light. a) providing a substrate comprising a structured first electrode; b) forming in succession first and second bilayer stacks (2, 3) on the structured first electrode, each bilayer stack (2, 3) comprising in succession first and second layers (20, 21; 30, 31) respectively made of first and second materials that are transparent conductive oxides able to be selectively etched; c) etching the second bilayer stack in a zone intended to accommodate a blue subpixel and in a zone intended to accommodate a green subpixel, the second bilayer stack being left intact under a zone intended to accommodate a red subpixel; d) etching the first bilayer stack in the zone intended to accommodate the blue subpixel, the first bilayer stack being left intact under the zone intended to accommodate the green subpixel; e) forming a stack of organic light-emitting layers, said stack being configured to emit white light and extending through the zones intended to accommodate the red, green and blue subpixels (PR, PV, PB); f) forming a second electrode on the stack of organic light-emitting layers so as to obtain an optical resonator with the first electrode; step b) being executed so that: - the first bilayer stack has a thickness chosen so that the optical resonator permits the transmission of green light, - the first and second bilayer stacks (2, 3) have a total thickness chosen so that the optical resonator permits the transmission of red light. - the first bilayer stack has a thickness chosen so that the optical resonator permits the transmission of green light, - the first and second bilayer stacks (2, 3) have a total thickness chosen so that the optical resonator permits the transmission of red light.