LCD TV의 120Hz/240Hz Frame Rate와 초고해상도 UD 구동 기술
Advanced Driving Technology of 120Hz/240Hz Frame Rate and Ultra High Resolution UD for LCD TV
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초록
Hold type의 고유한 LCD 약점을 극복하여 하기 위해 고속 frame rate 구동 back light scanning, black data insertion 등 여러 방법이 시도되고 있다. 가장 우수한 화질 특성을 갖지만, 반면 충전 시간 및 시스템 복잡성 기술적 제약이 따르는 배속 구동 (120Hz/240Hz)의 기술에 대해 소개하였다. 배속 구동을 통해 impulsive mode의 CRT와 동등한 동영상 응답 속도(MPRT)를 달성하였다. SPVA 광시야각 모드에서 240Hz 배속, UD 초고해상도 구동에서 각각 고속 구동에 따라 제한되는 충전 시간을 charge shared SPVA 화소 구조와 hG-2D 구동 방식을 개발함으로써 기존의 화질 특성을 유지하면서 충전 시간을 확보하여 LCD TV로써 최고의 화질이 가능하였다. source driver가 단면에 위치하는 single bank 방식의 단순화한 module 구조와 ME/MC의 배속 기능의 FRC 및 timing controller board에 one board solution의 설계를 통해 제품화 가능한 기술을 확보하였다.. 이러한 기술 개발로써 높은 화질 특성을 갖는 초고해상도/초고속 구동 시대를 가능하게 할 뿐 아니라, LCD TV의 차세대 performance 표준을 제시할 것이다.
Abstract
LCDs are the hold type display, which is an inherent weakness for motion blurring. Past improvement on liquid crystal essential response time do not fully resolve the motion blur. Hence various techniques have been published as candidate for solution to this issue. Examples include black data insertion, scanning backlights, and high frame rate driving. This paper discussed the high frame driving, which have high display quality characteristics but lack of charge time and increased system complexity. High speed driving approach has achieved the superior image in the motion picture to the impulsive type CRT. With our breakthrough of 120/240Hz and ultra definition LCD TV using charge shared SPVA and hG-2D pixel structure is developed, we can obtain the outstanding display quality without any degradation of display quality. Moreover, cost effective single bank module structure and one board solution with ME/MC FRC, will set a new standard for the next generation of high frame rate UD LCD TVs.
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