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Light-emitting device, electronic device, and lighting device

專利號
US11800734B2
公開日期
2023-10-24
申請人
Semiconductor Energy Laboratory Co., Ltd.
發(fā)明人
Shunpei Yamazaki; Takeyoshi Watabe; Tomohiro Kubota; Airi Ueda; Satoshi Seo; Nobuharu Ohsawa; Yuko Kubota
IPC分類
H01L51/50; H10K50/115; H10K50/16; H10K50/17; H10K85/60
技術(shù)領(lǐng)域
emitting,light,layer,skeleton,phenyl,in,group,oxide,yl,9h
地域: Kanagawa-ken

摘要

A light-emitting apparatus with low power consumption is provided. A light-emitting apparatus including a first light-emitting device and a first color conversion layer. The first light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a layer including a material with a refractive index lower than or equal to 1.75 at 467 nm. The first color conversion layer includes a first substance capable of emission by absorbing light. Light emitted from the first light-emitting device enters the first color conversion layer.

說明書

FIGS. 5A to 5C illustrate modification examples. FIG. 5A illustrates a state including a layer also serving as a blue color filter (a color filter 215B) instead of the structure 205B having a function of scattering light illustrated in FIG. 4A. FIGS. 5B and 5C illustrate states each including the structure 205B having a function of scattering light and the blue color filter 215B. Note that the blue color filter 215B may be in contact with the structure 205B having a function of scattering light, as illustrated in FIGS. 5B and 5C, or may be formed on another structure body such as a sealing substrate. Thus, the light-emitting apparatus has improved color purity while scattering light having directivity. Furthermore, reflection of external light can also be suppressed, leading to preferable display.

Light emitted from the first pixel 208B can be light with low directivity because light emitted from the first light-emitting device 207B passes through the structure 205B. This relieves a difference in light distribution characteristics depending on colors, and leads to a light-emitting apparatus with a high display quality.

權(quán)利要求

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