한국정보디스플레이학회:학술대회논문집
- 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
- /
- Pages.590-593
- /
- 2009
The correlation of the halo mura and off-axis light leakage level in LCDs with 2D dimmable LED backlight system
- Kwon, Jang-Un (Image Quality Development Depart. LG Display) ;
- Byun, Min-Chul (Image Quality Development Depart. LG Display) ;
- Ham, Jung-Hyun (Image Quality Development Depart. LG Display) ;
- Baek, Heume-Il (Image Quality Development Depart. LG Display) ;
- Moon, Hong-Man (Image Quality Development Depart. LG Display) ;
- Shin, Hyun-Ho (Image Quality Development Depart. LG Display)
- 발행 : 2009.10.12
초록
In the 2D local dimmable LED backlight system, each LED segment can be controlled separately. This can enhance the contrast ratio and reduce overall power consumption of LCDs. However, an artifact such as 'halo mura' can be observed around the bright object in the dark background. This is caused by the light leakage from the bright area into the dark one. Therefore, the 'halo mura' can be more easily observed in the oblique viewing direction. Thus, in this study, the perceivable degree of the halo mura is evaluated according to the level of the off-axis light leakage of LCDs. It is found that an acceptable degree of halo mura can be obtained in 2.0 cd/
키워드