发明授权
US08288937B2 White LED, and backlight and liquid crystal display device using the same
有权
白色LED,背光和液晶显示装置使用相同
- 专利标题: White LED, and backlight and liquid crystal display device using the same
- 专利标题(中): 白色LED,背光和液晶显示装置使用相同
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申请号: US12955999申请日: 2010-11-30
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公开(公告)号: US08288937B2公开(公告)日: 2012-10-16
- 发明人: Tsutomu Ishii , Yasumasa Ooya , Ryo Sakai , Katsutoshi Nakagawa , Hajime Takeuchi , Yumi Ito , Yasuhiro Shirakawa
- 申请人: Tsutomu Ishii , Yasumasa Ooya , Ryo Sakai , Katsutoshi Nakagawa , Hajime Takeuchi , Yumi Ito , Yasuhiro Shirakawa
- 申请人地址: JP Tokyo JP Yokohama-shi
- 专利权人: Kabushiki Kaisha Toshiba,Toshiba Materials Co., Ltd.
- 当前专利权人: Kabushiki Kaisha Toshiba,Toshiba Materials Co., Ltd.
- 当前专利权人地址: JP Tokyo JP Yokohama-shi
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权: JPP2008-143761 20080530
- 主分类号: H01L33/00
- IPC分类号: H01L33/00 ; H01J1/62
摘要:
A white LED includes a light emitting element with a light emission peak wavelength equal to or longer than 380 nm and equal to or shorter than 420 nm, and a phosphor layer containing three or more types of phosphors including at least a blue phosphor, a green phosphor, and a red phosphor and disposed in a manner to cover at least part of the light emitting element. The phosphor layer has a first phosphor layer and a second phosphor layer disposed in an opposite side of a side of the light emitting element of the first phosphor layer. In the first phosphor layer, a content of the blue phosphor in an entire phosphor contained in the first phosphor layer is equal to or less than 5 mass %, or the blue phosphor is not contained. In the second phosphor layer, a content of phosphor other than the blue phosphor in an entire phosphor contained in the second phosphor layer is equal to or less than 5 mass %, or no phosphor other than the blue phosphor is contained.