公开(公告)号：US20190295479A1

公开(公告)日：2019-09-26

申请号：US16441818

申请日：2019-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Byunghyun AN ,  Hyungoon KIM ,  Kanghyun YOON ,  Gwangmi GO

IPC: G09G3/34

Abstract: An image display apparatus is disclosed. The image display apparatus includes a panel, a plurality of light sources to output light to the panel, a plurality of switching elements to switch the light sources, and a processor to control the switching elements, wherein the processor controls a current having a variable level to flow into each light source string among the light sources, based on local dimming data, thereby improving contrast in displaying images.

公开(公告)号：US20240371318A1

公开(公告)日：2024-11-07

申请号：US18580899

申请日：2021-07-21

Applicant: LG ELECTRONICS INC.

Inventor： Dohoon KIM ,  Jinhaeng JANG ,  Kanghyun YOON

IPC: G09G3/3208 ,  G09G3/36 ,  H02H7/125 ,  H02M7/217

Abstract: An image display apparatus is disclosed. The image display apparatus according to an embodiment of the present disclosure includes: a display; and a power supply to supply a driving voltage to the display, wherein the power supply includes: an AC/DC converter comprising at least one switching device and configured to convert an input AC voltage into a DC voltage and output the DC voltage to a dc link; a dc link capacitor disposed at the dc link; an input voltage detector to detect the input AC voltage; a dc link voltage detector to detect a dc link voltage; and a controller to control the AC/DC converter, wherein in response to the detected input AC voltage exceeding a first reference value and the detected dc link voltage being lower than or equal to a second reference value lower than the first reference value, the controller is configured to turn off the switching device in the AC/DC converter. Accordingly, burnout of the dc link capacitor may be prevented.

公开(公告)号：US20170270873A1

公开(公告)日：2017-09-21

申请号：US15463791

申请日：2017-03-20

Applicant: LG ELECTRONICS INC.

Inventor： Byunghyun AN ,  Hyungoon KIM ,  Kanghyun YOON ,  Gwangmi GO

IPC: G09G3/34

CPC classification number: G09G3/3426 ,  G09G2320/0626 ,  G09G2320/066 ,  G09G2320/0686 ,  G09G2330/021

Abstract: An image display apparatus is disclosed. The image display apparatus includes a panel, a plurality of light sources to output light to the panel, a plurality of switching elements to switch the light sources, and a processor to control the switching elements, wherein the processor controls a current having a variable level to flow into each light source string among the light sources, based on local dimming data, thereby improving contrast in displaying images.