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:
May. 18, 2010
Filed:
Mar. 29, 2006
Naoji Nada, Kanagawa, JP;
Yoshihiro Oshima, Gifu, JP;
Toshitaka Kawashima, Kanagawa, JP;
Satoshi Tomioka, Kanagawa, JP;
Junichi Osako, Tokyo, JP;
Naoji Nada, Kanagawa, JP;
Yoshihiro Oshima, Gifu, JP;
Toshitaka Kawashima, Kanagawa, JP;
Satoshi Tomioka, Kanagawa, JP;
Junichi Osako, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A light-emitting diode device and backlight apparatus and liquid-crystal display apparatus using light-emitting diode device are provided. A light-emitting diode device has a lens covered around a light-emitting diode chip and a processed portion for adjusting light going from the light-emitting diode chip along the central axis of the lens is provided at the light-emitting diode chip or the lens or being provided right above the lens. The light-emitting diode chip is processed near the central axis by a suitable method such as etching. Alternatively, a diffusion material containing low refractive index material portion or an angle selective film is provided on the lens. A light-emitting diode device is able to adjust a quantity of light emitted from the LED chip along the central axis of the lens so that light can be radiated with a desired angle distribution. A backlight apparatus and a liquid-crystal display apparatus are able to suppress ununiformity of brightness and ununiformity of color by using the above-mentioned light-emitting diode device.