Seiko Epson Corporation

Tetsuo Nakagawa

Yuji Shinohara

A light emitting apparatus including a plurality of light emitting devices for different colors and having a simple structure with small variations in luminous brightness of each of the light emitting devices for the different colors is provided, and electronic equipment provided with such a light emitting apparatus is also provided. The light emitting apparatus is configured into a display apparatuswhich comprises: a TFT circuit board (counter substrate); red light emitting devicesR provided on the TFT circuit boardand emitting a light of a red luminescent color (R); green light emitting devicesG provided on the TFT circuit boardand emitting a light of a green luminescent color (G); and blue light emitting devicesB provided on the TFT circuit boardand emitting a light of a blue luminescent color (B); and wherein roughness is formed on an interface between a hole transport layerand a red light emitting layerR in each of the red light emitting devicesR, while no roughness is formed on an interfaces between a hole transport layer and a light emitting layer in each of the green light emitting devicesG and the blue light emitting devicesB. With these structures, it is possible to make the luminous brightness in each of the light emitting devicesR,G andB for the respective colors substantially equal to each other when substantially the same voltage is applied thereto.

Growing community of inventors

Chino, Japan

Tetsuo Nakagawa