发明授权
US08872421B2 White LED, backlight using the same, and liquid crystal display device
有权
白色LED,背光使用相同,以及液晶显示装置
- 专利标题: White LED, backlight using the same, and liquid crystal display device
- 专利标题(中): 白色LED,背光使用相同,以及液晶显示装置
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申请号: US13407942申请日: 2012-02-29
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公开(公告)号: US08872421B2公开(公告)日: 2014-10-28
- 发明人: Hajime Takeuchi , Ryo Sakai , Tsutomu Ishii , Yasumasa Ooya , Yasuhiro Shirakawa
- 申请人: Hajime Takeuchi , Ryo Sakai , Tsutomu Ishii , Yasumasa Ooya , 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: JPP2009-202899 20090902
- 主分类号: H01J1/62
- IPC分类号: H01J1/62 ; H01J63/04 ; G02F1/1335 ; H01J1/63 ; H01L33/50 ; H01L33/60
摘要:
Certain embodiments provide a white LED for a backlight of a liquid crystal display device, which comprises an ultraviolet (or violet) light emitting element and a phosphor layer that contains a green phosphor selected from trivalent cerium- and terbium-activated rare earth borate phosphors, a blue phosphor selected from divalent europium-activated halophosphate phosphors and divalent europium-activated aluminate phosphors, and a red phosphor selected from europium-activated lanthanum oxysulfide phosphors and europium-activated yttrium oxysulfide phosphors as the contained amounts of the respective phosphors relative to the total amount of the phosphors as follows: 35-50% by weight of the green phosphor content; 50-70% by weight of the blue phosphor content; and 1-10% by weight of the red phosphor content.
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