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. 04, 2006
Filed:
May. 13, 2004
Tetsuya Utsumi, Deceased, Kariya, JP;
Tomoko Utsumi, Legal Representative, Kariya, JP;
Masaaki Arima, Kariya, JP;
Masayuki Harada, Kariya, JP;
Mari Funada, Kariya, JP;
Tetsuya Utsumi, deceased, Kariya, JP;
Tomoko Utsumi, legal representative, Kariya, JP;
Masaaki Arima, Kariya, JP;
Masayuki Harada, Kariya, JP;
Mari Funada, Kariya, JP;
Kabushiki Kaisha Toyota Jidoshokki, Kariya, JP;
Abstract
In a light-emitting apparatus, a face of a substrate on which a light-emitting device is formed is an uneven surface having a plurality of asperities. The mean spacing Sm of adjacent asperities or the mean spacing S of peaks of adjacent projections of the asperities is no less than three times the longest wavelength of light generated by a light-emitting layer and no more than two hundred times the longest wavelength. The arithmetic mean slope Δa of the uneven surface is in a range between 4° and 30°, inclusive. Therefore, the apparatus emits substantially a greater amount of light from a light extraction side and has less brightness unevenness than a light-emitting apparatus with no uneven surface.