公开(公告)号：US12032239B2

公开(公告)日：2024-07-09

申请号：US17618170

申请日：2020-02-06

Applicant: LG ELECTRONICS INC.

Inventor： Hyunho Lee ,  Wootae Kim ,  Moongi Jeong ,  Changguk Lee ,  Jinseok Lee

IPC: G02F1/13357 ,  H01L33/00 ,  H01L33/50

CPC classification number: G02F1/133603 ,  G02F1/133606 ,  G02F1/133611 ,  H01L33/005 ,  H01L33/502 ,  H01L2933/0041

Abstract: Discussed is a backlight unit, including a base substrate; a partition wall on the base substrate and including a plurality of grooves; semiconductor light-emitting devices on the base substrate and in the plurality of grooves, respectively; a phosphor layer defined in each of the plurality of grooves to cover the semiconductor light-emitting devices and absorbs light in a specific wavelength band to emit light in a wavelength band different from the light in the specific wavelength band; a light diffusion layer that above the phosphor layer and diffuses light; and a spacer between the partition wall and the light diffusion layer, wherein the spacer includes: a body part attached to the partition wall; and a protruding part protruding in a direction toward the light diffusion layer and attached to the light diffusion layer, such that the light diffusion layer and the phosphor layer are spaced apart from each other.