公开(公告)号：US20200066215A1

公开(公告)日：2020-02-27

申请号：US16506154

申请日：2019-07-09

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jahun Koo ,  Jinho Park ,  Jong Deuk Moon ,  Su-Han Woo ,  Kyung-Hun Lee ,  Kyung-Uk Choi

IPC: G09G3/34 ,  G09G3/36

Abstract: A liquid crystal display device includes a liquid crystal display panel, a light source configured to provide the liquid crystal display panel with a light, a vertical blank detector circuit configured to calculate a counting value of a vertical blank period of a frame by counting a synchronization signal, a luminance correction value calculator circuit configured to calculate a luminance correction value by comparing the counting value of the vertical blank period with a plurality of reference counting values, and a light source driver configured to generate a light source driving signal and provide the light source driving signal to the light source. The light source driving signal has a normal level corresponding to a normal luminance value in an active period of the frame and has a correction level corresponding to the luminance correction value in the vertical blank period of the frame.

公开(公告)号：US10181293B2

公开(公告)日：2019-01-15

申请号：US15153493

申请日：2016-05-12

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hoe-seok Na ,  Jaewan Park ,  Mun-san Park ,  Jang-hyun Yeo ,  Jinho Park ,  Bonghyun You

IPC: G09G3/34 ,  G09G3/20 ,  G09G3/36

Abstract: A display apparatus includes: a backlight to generate light; a display panel to display an image by utilizing the light; a driving part to provide image signals corresponding to the image to the display panel; and a timing controller to drive the backlight, to drive the driving part at a first frequency when the image is a moving image, and to drive the driving part at a second frequency lower than the first frequency when the image is a still image. The timing controller is to set the second frequency based on a value obtained by applying a reduction rate of a flicker index corresponding to a dimming index of the backlight to a flicker index of image signals of a previous frame.