公开(公告)号：US11422405B2

公开(公告)日：2022-08-23

申请号：US16950533

申请日：2020-11-17

Applicant: LG Display Co., Ltd.

Inventor： GwanHoon Park ,  SangChul Ryu ,  DongSeok Lee ,  Suhun Lee

IPC: G02F1/00 ,  G02F1/13357 ,  G02F1/1335

Abstract: Embodiments of the present disclosure relate to a light conversion film, a backlight unit and a display device, and according to the embodiments, white light can be produced by a simplified configuration and be uniformly provided to a panel by disposing, over areas corresponding to light sources, patterns changing traveling paths of light emitted from a light source and patterns converting wavelengths of light. Further, by allowing a base film to provide a function of guiding light by disposing, over a light source, the base film on which a light path change pattern and a color conversion pattern are disposed to be adjacent to the light source, it is possible to minimize a thickness of the backlight unit and enhance image quality presented by illumination of the backlight unit.

公开(公告)号：US11630345B2

公开(公告)日：2023-04-18

申请号：US17500288

申请日：2021-10-13

Applicant: LG DISPLAY CO., LTD.

Inventor： SuHun Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  GwanHoon Park ,  KyuHwan Lee

IPC: G02F1/13357 ,  F21V8/00

Abstract: Provided are a light guide film, a backlight unit, and a display device. Light guide portions are disposed in holes of a reflection plate on which light sources are disposed, and a light guide film is directly disposed on the reflection plate and the light guide portions to provide a light guiding function and a light shielding function. Therefore, a method of facilitating implementation of a backlight unit with a small thickness, which satisfies image quality is provided. Further, each of the light shielding patterns has different reflectances in different areas, thereby increasing the amount of light supplied to an area between light sources. Therefore, a backlight unit with a reduced number of light sources and improved image quality may be provided.

公开(公告)号：US11231615B2

公开(公告)日：2022-01-25

申请号：US17077672

申请日：2020-10-22

Applicant: LG DISPLAY CO., LTD.

Inventor： Kyuhwan Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  GwanHoon Park ,  Suhun Lee

IPC: G02F1/00 ,  G02F1/13357 ,  G02F1/1335

Abstract: Disclosed is a backlight unit and a display device including the same. The backlight unit can include a light emitting section including a plurality of light emitting devices disposed on a substrate, and a light source protection layer disposed on the plurality of light emitting devices, wherein an air gap is disposed between a top surface of the substrate and a bottom surface of the light source protection layer and in between the light emitting devices, a light conversion sheet having a plurality of light conversion patterns disposed in positions corresponding to the plurality of light emitting devices, and a phosphor film disposed on the light conversion sheet.

公开(公告)号：US20220107530A1

公开(公告)日：2022-04-07

申请号：US17553398

申请日：2021-12-16

Applicant: LG DISPLAY CO., LTD.

Inventor： Kyuhwan Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  GwanHoon Park ,  Suhun Lee

IPC: G02F1/13357

Abstract: A display device including a display panel, and a backlight unit configured to provide light to the display panel are discussed. The backlight unit can include a light emitting section including a plurality of light emitting devices disposed on a substrate, and a light source protection layer disposed on the plurality of light emitting devices, a light conversion sheet having a plurality of light conversion patterns disposed in positions corresponding to the plurality of light emitting devices, respectively, a phosphor film disposed on the light conversion sheet, and at least one reflector including a plurality of holes on the substrate. An air gap is disposed between a top surface of the at least one reflector and a bottom surface of the light conversion sheet.

公开(公告)号：US11175531B2

公开(公告)日：2021-11-16

申请号：US16900774

申请日：2020-06-12

Applicant: LG Display Co., Ltd.

Inventor： SuHun Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  GwanHoon Park ,  KyuHwan Lee

IPC: G02F1/13357 ,  F21V8/00

Abstract: Provided are a light guide film, a backlight unit, and a display device. Light guide portions are disposed in holes of a reflection plate on which light sources are disposed, and a light guide film is directly disposed on the reflection plate and the light guide portions to provide a light guiding function and a light shielding function. Therefore, a method of facilitating implementation of a backlight unit with a small thickness, which satisfies image quality is provided. Further, each of the light shielding patterns has different reflectances in different areas, thereby increasing the amount of light supplied to an area between light sources. Therefore, a backlight unit with a reduced number of light sources and improved image quality may be provided.

公开(公告)号：US11353740B2

公开(公告)日：2022-06-07

申请号：US17072336

申请日：2020-10-16

Applicant: LG Display Co., Ltd.

Inventor： Kyuhwan Lee ,  GwanHoon Park ,  Suhun Lee

IPC: G02F1/1335 ,  G02F1/13357

Abstract: A backlight unit comprises a light emitting unit having a plurality of light emitting elements, a light conversion sheet having a plurality of light conversion patterns disposed at positions corresponding to the plurality of light emitting elements, and a phosphor film disposed on the light conversion sheet and including a partition wall dividing a light emitting surface into a plurality of sub-blocks and phosphor layers respectively disposed on the plurality of sub-blocks.

公开(公告)号：US11163193B2

公开(公告)日：2021-11-02

申请号：US16999955

申请日：2020-08-21

Applicant: LG Display Co., Ltd.

Inventor： GwanHoon Park ,  SuHun Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  KyuHwan Lee

IPC: G02F1/13357 ,  F21V9/30 ,  F21V9/32 ,  F21V9/20 ,  F21V9/35 ,  F21V8/00 ,  G02F1/1335

Abstract: Embodiments of the disclosure are related to a backlight unit and a display device, by disposing a filter reflecting a green light of a long wavelength on a color conversion sheet and disposing a filter reflecting a green light and a red light under the color conversion sheet, a wavelength band of a light supplied to a display panel is controlled and a color reproduction range may be improved while increasing a light efficiency. Furthermore, by disposing a sheet increasing an amount of a vertical light on the color conversion sheet, a wavelength band of a light reflected by a filter disposed on the color conversion sheet is controlled exactly and the backlight unit and the display device capable of a wide color gamut may be provided.

公开(公告)号：US11493802B2

公开(公告)日：2022-11-08

申请号：US17553398

申请日：2021-12-16

Applicant: LG DISPLAY CO., LTD.

Inventor： Kyuhwan Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  GwanHoon Park ,  Suhun Lee

IPC: G02F1/00 ,  G02F1/13357 ,  G02F1/1335

Abstract: A display device including a display panel, and a backlight unit configured to provide light to the display panel are discussed. The backlight unit can include a light emitting section including a plurality of light emitting devices disposed on a substrate, and a light source protection layer disposed on the plurality of light emitting devices, a light conversion sheet having a plurality of light conversion patterns disposed in positions corresponding to the plurality of light emitting devices, respectively, a phosphor film disposed on the light conversion sheet, and at least one reflector including a plurality of holes on the substrate. An air gap is disposed between a top surface of the at least one reflector and a bottom surface of the light conversion sheet.

公开(公告)号：US11460732B2

公开(公告)日：2022-10-04

申请号：US17094417

申请日：2020-11-10

Applicant: LG Display Co., Ltd.

Inventor： MyungJoon Park ,  JaeHo Lee ,  GwanHoon Park ,  Kyuhwan Lee

IPC: G02F1/13357 ,  G02F1/1335

Abstract: Embodiments of the present disclosure relates to a light path control element, a backlight unit and a display device, and by disposing, over one or more light sources, a light path control element including a first engraved patterns located on a surface through which light exits and located to correspond to respective light sources, and a second engraved patterns located on a surface into which light is incident and located in an areas between light sources, it is possible to improve functions of guiding and diffusing light emitted from the light sources. Accordingly, by increasing a distance between light sources and enabling a hot spot to be prevented and luminance uniformity to improve, it is possible to reduce the number of light sources and provide a backlight unit producing improved image quality.

公开(公告)号：US20210149251A1

公开(公告)日：2021-05-20

申请号：US17077672

申请日：2020-10-22

Applicant: LG DISPLAY CO., LTD.

Inventor： Kyuhwan Lee ,  SangChul Ryu ,  DongSeok Lee ,  MyungJoon Park ,  GwanHoon Park ,  Suhun Lee

IPC: G02F1/13357

Abstract: Disclosed is a backlight unit and a display device including the same. The backlight unit can include a light emitting section including a plurality of light emitting devices disposed on a substrate, and a light source protection layer disposed on the plurality of light emitting devices, wherein an air gap is disposed between a top surface of the substrate and a bottom surface of the light source protection layer and in between the light emitting devices, a light conversion sheet having a plurality of light conversion patterns disposed in positions corresponding to the plurality of light emitting devices, and a phosphor film disposed on the light conversion sheet.