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:
Oct. 22, 2012
Filed:
Jun. 01, 2000
Tatsuya Shimoda, Suwa, JP;
Tomoko Koyama, Suwa, JP;
Takeo Kaneko, Suwa, JP;
Jeremy Henley Burroughes, Cambridge, GB;
Tatsuya Shimoda, Suwa, JP;
Tomoko Koyama, Suwa, JP;
Takeo Kaneko, Suwa, JP;
Jeremy Henley Burroughes, Cambridge, GB;
Seiko Epson Corporation, Tokyo, JP;
Cambridge Display Technology Ltd, Cambridge, GB;
Abstract
A multiple wavelength light emitting device is provided wherewith the resonance strength and directivity between colors can be easily adjusted for balance. This light emitting device comprises a light emission meansfor emitting light containing wavelength components to be output, and a semi-reflecting layer groupwherein semi-reflecting layersR,G, andB that transmit some light having specific wavelengths emitted from the light emission means and reflect the remainder are stacked up in order in the direction of light advance in association with wavelengths of light to be output. Light emission regions A, A, and Aare determined in association with the wavelengths of light to be output. The configuration is such that, in the light emission regions, the distances L, Land Lbetween a reflecting surface for fight from the light emission means side of the semi-reflecting layersR,G, andB that reflect light output from those light emission regions and a point existing in an interval from the end of the light emitting layer on the semi-reflecting layer group side to the reflecting layer are adjusted so as to have an optical path length at which that light resonates.