The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2011
Filed:
May. 24, 2006
Yuji Shinohara, Suwa, JP;
Tetsuo Nakagawa, Chino, JP;
Yuji Shinohara, Suwa, JP;
Tetsuo Nakagawa, Chino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
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.