LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREOF

Disclosed is a local dimming liquid crystal display device. The present local dimming liquid crystal display device comprises: a display panel unit having a plurality of pixels; a panel driving unit for driving each of the plurality of pixels; a backlight unit comprising a plurality of backlights fo...

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Bibliographic Details
Main Authors MOON, Young-su, JEONG, Young-hoon, CHOI, Doo-seop, GIM, Gi-yeong
Format Patent
LanguageEnglish
French
Korean
Published 26.05.2017
Subjects
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Summary:Disclosed is a local dimming liquid crystal display device. The present local dimming liquid crystal display device comprises: a display panel unit having a plurality of pixels; a panel driving unit for driving each of the plurality of pixels; a backlight unit comprising a plurality of backlights for dividing the display panel unit into a plurality of areas to emit light to each of the plurality of regions; a backlight driving unit for driving the plurality of backlights on the basis of gray level information of the plurality of pixels corresponding to each of the plurality of areas; and a processor for calculating a first amount of light to be incident on each pixel on the basis of the gray level of each pixel, calculating a second amount of light incident on each pixel in accordance with a driving state of the plurality of backlights, changing the gray level of at least one of the plurality of pixels on the basis of the difference between the first amount of light and the second amount of light, and controlling the panel driving unit on the basis of the changed gray level. L'invention concerne un dispositif d'affichage à cristaux liquides à gradation locale. Le présent dispositif d'affichage à cristaux liquides à gradation locale comprend : une unité panneau d'affichage comportant une pluralité de pixels; une unité de commande de panneau servant à commander chaque pixel de la pluralité de pixels; une unité de rétroéclairage comprenant une pluralité de modules de rétroéclairage servant à diviser l'unité panneau d'affichage en une pluralité de zones permettant d'émettre de la lumière vers chaque région de la pluralité de régions; une unité de commande de rétroéclairage servant à commander la pluralité de modules de rétroéclairage sur la base d'informations de niveau de gris de la pluralité de pixels correspondant à chaque zone de la pluralité de zones; et un processeur servant à calculer une première quantité de lumière devant être incidente sur chaque pixel sur la base du niveau de gris de chaque pixel, à calculer une seconde quantité de lumière incidente sur chaque pixel conformément à un état de commande de la pluralité de modules de rétroéclairage, à modifier le niveau de gris d'au moins un pixel de la pluralité de pixels sur la base de la différence entre la première quantité de lumière et la seconde quantité de lumière, et à commander l'unité de commande de panneau sur la base du niveau de gris modifié. 로컬 디밍(local dimming) 액정 표시 장치가 개시된다. 본 로컬 디밍 액정 표시 장치는 복수의 픽셀을 구비한 표시 패널부, 복수의 픽셀 각각을 구동하는 패널 구동부, 표시 패널부를 복수의 영역으로 구분하여 각각에 광을 조사하는 복수의 백라이트를 포함하는 백라이트부, 복수의 영역 각각에 대응되는 복수의 픽셀의 그레이 레벨(gray level) 정보에 기초하여 복수의 백라이트를 구동하는 백라이트 구동부 및 각 픽셀의 그레이 레벨에 기초하여 각 픽셀에 입사되어야 하는 제1 광량을 산출하고, 복수의 백라이트의 구동 상태에 따라 각 픽셀에 입사되는 제2 광량을 산출하여, 제1 광량 및 제2 광량의 차이에 기초하여 복수의 픽셀 중 적어도 하나의 그레이 레벨을 변경하고, 변경된 그레이 레벨에 기초하여 패널 구동부를 제어하는 프로세서를 포함한다.
Bibliography:Application Number: WO2015KR12282