发明授权
- 专利标题: Light emitting apparatus, display apparatus and method for controlling light emitting apparatus
- 专利标题(中): 发光装置,显示装置及控制发光装置的方法
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申请号: US11802997申请日: 2007-05-29
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公开(公告)号: US07700964B2公开(公告)日: 2010-04-20
- 发明人: Taiji Morimoto , Masanori Watanabe
- 申请人: Taiji Morimoto , Masanori Watanabe
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Morrison & Foerster LLP
- 优先权: JP2006-148986 20060529
- 主分类号: H01L33/00
- IPC分类号: H01L33/00
摘要:
In a light emitting apparatus using LEDs, luminance and chromaticity of the LED changes largely due to a temperature change. Meanwhile, by using phosphors, it is possible to improve the stability of the luminance and chromaticity against the temperature change. However, color reproducibility of the light emitting apparatus decreases. Therefore, the light emitting apparatus includes a first LED, a second LED, a first phosphor which is excited by the second LED and emits light whose color is the same as or similar to a color of light emitted from the first LED, and a control circuit which controls a ratio between an emission intensity of the first LED and an emission intensity of the second LED.