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:
Dec. 16, 2008
Filed:
Nov. 22, 2006
Kenji Okishiro, Kawasaki, JP;
Masatoshi Shiiki, Musashimurayama, JP;
Kenji Okishiro, Kawasaki, JP;
Masatoshi Shiiki, Musashimurayama, JP;
Hitachi Displays, Ltd., Chiba-ken, JP;
Abstract
A liquid crystal display device includes a light source and a liquid crystal display panel. The light source includes a blue-emitting phosphor configured to emit blue light, a green-emitting phosphor configured to emit green light, and a red-emitting phosphor configured to emit red light. The liquid crystal display panel includes color filters configured to control the transmittance of light from the light source and transmit one of blue, green, and red light on a pixel basis. The green-emitting phosphor is represented by a compositional formula of (La,Tb,Ce)PO, wherein 'x' and 'y' are compositional ratios satisfying both the following conditions: 0.500<(x+y)<0.700 and 1.20<(y/x)<2.00. The compositional ratios “x” and “y” preferably satisfy the following conditions: 0.50<(x+y)<0.65 and 1.50<(y/x)<1.70.