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    Light-emitting device with optimized viewing angle
    1.
    发明授权
    Light-emitting device with optimized viewing angle 有权

    公开(公告)号：US10862011B2

    公开(公告)日：2020-12-08

    申请号：US15260469

    申请日：2016-09-09

    Applicant: EPISTAR CORPORATION

    Inventor： Yih-Hua Renn ,  Ching-Tai Cheng ,  Chun-Hua Shih

    IPC: H01L33/40 ,  H01L33/50 ,  H01L33/62

    Abstract: A light-emitting device includes a light-emitting element and a wavelength conversion layer. The light-emitting element has a top surface, a bottom surface, a side surface, and a first electrical contact formed on the bottom surface. The distance between the top surface and the bottom surface has a first height (h1). The wavelength conversion layer has a first area (A1) located on the top surface of the light-emitting element and a second area (A2) located on the side surfaces and surrounding the first area. The first area has a second height (h2). The second area has a third height (h3) and a second width (w2). The second height (h2) is greater than the second width (w2). The difference of the third height and the sum of the first height and the second height is less than 15 μm.

    Light-emitting device and manufacturing method thereof
    6.
    发明授权
    Light-emitting device and manufacturing method thereof 有权

    公开(公告)号：US10062816B2

    公开(公告)日：2018-08-28

    申请号：US15395917

    申请日：2016-12-30

    Applicant: EPISTAR CORPORATION

    Inventor： Ching-Tai Cheng ,  Chun-Hua Shih ,  Yih-Hua Renn

    IPC: H01L33/00 ,  H01L33/50 ,  H01L33/62 ,  H01L33/60 ,  H01L33/48

    CPC classification number: H01L33/508 ,  H01L33/483 ,  H01L33/505 ,  H01L33/60 ,  H01L33/62 ,  H01L2933/0041

    Abstract: A light-emitting device includes a light-emitting element, a wavelength conversion layer and a light pervious element. The light-emitting element includes a top surface, a bottom surface, a plurality of side surfaces connecting to the top surface and the bottom surface, and a first electrical contact formed on the bottom surface. The wavelength conversion layer covers the top surface of the light-emitting element to form a first thickness, has an average thickness, and includes a transparent binder and a plurality of wavelength conversion particles having an equivalent particle diameter D50. The light pervious element includes a light exiting surface and is disposed on the wavelength conversion layer. The D50 of the wavelength conversion particles is not great than 10 μm. A ratio of the average thickness to the D50 of the wavelength conversion layer is ranged from 6 to 20.

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