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. 19, 2008
Filed:
Sep. 24, 2004
Masato Hatanaka, Saitama, JP;
Kazuhiro Yokota, Saitama, JP;
Haruaki Wada, Chiba, JP;
Takashi Oku, Saitama, JP;
Masato Hatanaka, Saitama, JP;
Kazuhiro Yokota, Saitama, JP;
Haruaki Wada, Chiba, JP;
Takashi Oku, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention relates to a backlight apparatus and a liquid crystal display apparatus, capable of realizing a backlight apparatus having high color reproductivity without color irregularities in a backlight apparatus having a LED device as its light source. In the optical unit, there are disposed the dichroic mirror B which transmits green light Lg and red light Lr and reflects blue light Lb, the dichroic mirror G which transmits the light Lb and the light Lr and reflects the light Lg, and the dichroic mirror R which transmits the light Lb and the light Lg and reflects the light Lr, and they transmit or reflect the light emitted from the LED devicesB,G andR to mix to form the white light Lw. The light Lw formed by the dichroic mirrors B, G and R is entered to the light guiding plateby the mirror performing a total reflection. Therefore, in the backlight apparatus having an LED device as its light source, it is possible to realize a backlight apparatus having high color reproductivity, without color irregularities.