Invention Application

  • Patent Title: Backlight Unit and Display Device
  • Application No.: US16696923
    Application Date: 2019-11-26
  • Publication No.: US20200183232A1
    Publication Date: 2020-06-11
  • Inventor: KiSeong KIMHyeokJoon YOONSeungJu GWONDonghwi KIM
  • Applicant: LG Display Co., Ltd.
  • Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@3cbec5ea com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2ff8f096
  • Main IPC: G02F1/1335
  • IPC: G02F1/1335
Backlight Unit and Display Device
Abstract:
In an embodiment, a display device comprises a display panel and a backlight unit. The backlight unit comprises a printed circuit, a light-emitting device on the printed circuit, and a transparent film including a holographic film. The holographic film includes at least an optical pattern overlapping the light-emitting device and modifying angle of a portion of light emitted by the light-emitting device. The backlight unit further comprises a light output pattern, where the portion of light with the modified angle passes through the light output pattern toward the display panel. The light output pattern may have a refractive index greater than a refractive index of the transparent film such that a refraction angle of the portion of light exiting the light output pattern is less than the incidence angle of the portion of light entering the light output pattern.
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