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:
Aug. 01, 2006
Filed:
Jul. 14, 2003
Tetsu Kachi, Nisshin, JP;
Satoru Kato, Nisshin, JP;
Tetsu Kachi, Nisshin, JP;
Satoru Kato, Nisshin, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Abstract
An increased proportion of light projected from a nitride semiconductor light emitting diode enters the area within a specified angle. The nitride semiconductor light emitting diode is provided with an active layerconsisting of a nitride semiconductor, and a light projecting faceA reflecting mirroris formed only on a side of the active layeropposite the light projecting faceThe reflecting mirroris formed at a location from the center of the active layerapproximately (k·λ/2+λ/4)/n (where λ is the wavelength of light projected from the active layern is the mean refractive index of an area between the active layerand the reflecting mirrorand k is an integer). This light emitting diode allows directivity to be increased sufficiently, and the coupling efficiency thereof with optical fiber consisting of POF or the like can be improved.