KR102328841B1 - 유기 발광 다이오드 표시장치와 그 구동 방법 - Google Patents
유기 발광 다이오드 표시장치와 그 구동 방법 Download PDFInfo
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Abstract
Description
도 3은 IR 드롭으로 인한 표시패널의 위치에 따라 휘도 편차가 생기는 것을 보여주는 도면.
도 4는 구동 TFT의 동작 특성을 그래프를 보여주는 도면.
도 5 및 도 6은 본 발명의 실시예에 따른 OLED 표시장치를 보여주는 도면.
도 7은 도 6에 도시된 OLED 표시장치의 픽셀을 보여 주는 회로도.
도 8은 IR 드롭으로 인한 휘도 편차를 최소화하기 위해 데이터 어드레싱 속도를 조절하는 일 예를 보여주는 도면.
도 9는 도 8의 적용 전후에 있어 표시패널의 위치별 휘도 분포를 보여주는 도면.
도 10은 IR 드롭으로 인한 휘도 편차를 최소화하기 위해 데이터 어드레싱 속도를 조절하는 다른 예를 보여주는 도면.
도 11은 도 10의 적용 전후에 있어 표시패널의 위치별 휘도 분포를 보여주는 도면.
도 12는 데이터 어드레싱 속도를 조절하기 위해 서브 프레임 단위로 게이트 쉬프트 클럭의 펄스 주기를 조절하는 멀티플렉서를 보여주는 도면.
도 13a 내지 도 13d는 도 10의 제1 내지 제4 서브 프레임 각각에 할당되는 게이트 쉬프트 클럭과 그에 따른 스캔 펄스들을 보여주는 도면들.
도 14는 한 프레임 내에 더미 서브 프레임을 더 포함한 OLED 표시장치의 프레임 구성을 보여주는 도면.
12: 데이터 구동부 13: 게이트 구동부
Claims (14)
- 다수의 픽셀들이 구비된 표시패널;
상기 표시패널의 신호 라인들을 구동하는 표시패널 구동부; 및
한 프레임을 다수의 서브 프레임들로 분할하고 입력 영상의 데이터를 비트별로 분리하여 상기 서브 프레임들에 맵핑하며, 상기 표시패널 구동부의 동작을 제어하여 상기 서브 프레임들에 대한 데이터 어드레싱 속도를 조절하는 타이밍 콘트롤러를 구비하며,
상기 픽셀들을 구동하기 위한 고전위 전원 전압이 상기 표시패널의 상단으로부터 인가되고, 라인 순차 방식에 따라 순차적으로 상기 표시패널의 상단으로부터 하단으로 데이터 어드레싱이 행해질 때,
상기 타이밍 콘트롤러는,
상기 데이터의 MSB(Most Significant Bit)가 맵핑될 첫 번째 서브 프레임으로부터, 상기 데이터의 LSB(Least Significant Bit)가 맵핑될 마지막 번째 서브 프레임으로 갈수록 상기 데이터 어드레싱 속도를 느리게 조절하는, OLED 표시장치. - 제 1 항에 있어서,
상기 타이밍 콘트롤러는 상기 서브 프레임들 중 적어도 하나 이상의 서브 프레임에 대한 데이터 어드레싱 속도를 미리 정해진 기준값과 다르게 조정하는, OLED 표시장치. - 삭제
- 제 1 항에 있어서,
상기 픽셀들을 구동하기 위한 고전위 전원 전압이 상기 표시패널의 하단으로부터 인가되고, 라인 순차 방식에 따라 순차적으로 상기 표시패널의 상단으로부터 하단으로 데이터 어드레싱이 행해질 때,
상기 타이밍 콘트롤러는,
상기 데이터의 MSB(Most Significant Bit)가 맵핑될 첫 번째 서브 프레임으로부터, 상기 데이터의 LSB(Least Significant Bit)가 맵핑될 마지막 번째 서브 프레임으로 갈수록 상기 데이터 어드레싱 속도를 빠르게 조절하는, OLED 표시장치. - 제 1 항에 있어서,
상기 타이밍 콘트롤러는,
서로 다른 펄스 주기를 갖는 다수의 게이트 쉬프트 클럭들을 입력받고, 각 서브 프레임의 시작 타이밍에 맞추어 상기 게이트 쉬프트 클럭들 중 어느 하나를 선택적으로 상기 표시패널 구동부에 출력하는 멀티플렉서를 포함하는 것을 특징으로 하는 OLED 표시장치. - 제 1 항에 있어서,
상기 한 프레임 내에는 마지막 번째 서브 프레임 이후에 더미 서브 프레임이 더 배치되고,
상기 더미 서브 프레임의 기간은 상기 표시패널의 상하 표시라인 별로 달라지는, OLED 표시장치. - 제 6 항에 있어서,
상기 표시패널 구동부는,
상기 더미 서브 프레임 동안 상기 픽셀들을 비 발광시키는 데이터전압을 상기 표시 패널에 인가하는, OLED 표시장치. - 다수의 픽셀들이 구비된 표시패널과 상기 표시패널의 신호 라인들을 구동하는 표시패널 구동부를 갖는 OLED 표시장치의 구동방법에 있어서,
한 프레임을 다수의 서브 프레임들로 분할하고 입력 영상의 데이터를 비트별로 분리하여 상기 서브 프레임들에 맵핑하는 단계; 및
상기 표시패널 구동부의 동작을 제어하여 상기 서브 프레임들에 대한 데이터 어드레싱 속도를 조절하는 단계를 포함하며,
상기 픽셀들을 구동하기 위한 고전위 전원 전압이 상기 표시패널의 상단으로부터 인가되고, 라인 순차 방식에 따라 순차적으로 상기 표시패널의 상단으로부터 하단으로 데이터 어드레싱이 행해질 때,
상기 데이터 어드레싱 속도를 조절하는 단계는,
상기 데이터의 MSB(Most Significant Bit)가 맵핑될 첫 번째 서브 프레임으로부터, 상기 데이터의 LSB(Least Significant Bit)가 맵핑될 마지막 번째 서브 프레임으로 갈수록 상기 데이터 어드레싱 속도를 느리게 조절하는 단계인, OLED 표시장치의 구동방법. - 제 8 항에 있어서,
상기 데이터 어드레싱 속도를 조절하는 단계는,
상기 서브 프레임들 중 적어도 하나 이상의 서브 프레임에 대한 데이터 어드레싱 속도를 미리 정해진 기준값과 다르게 조정하는 단계를 지시하는, OLED 표시장치의 구동방법. - 삭제
- 제 8 항에 있어서,
상기 픽셀들을 구동하기 위한 고전위 전원 전압이 상기 표시패널의 하단으로부터 인가되고, 라인 순차 방식에 따라 순차적으로 상기 표시패널의 상단으로부터 하단으로 데이터 어드레싱이 행해질 때,
상기 데이터 어드레싱 속도를 조절하는 단계는,
상기 데이터의 MSB(Most Significant Bit)가 맵핑될 첫 번째 서브 프레임으로부터, 상기 데이터의 LSB(Least Significant Bit)가 맵핑될 마지막 번째 서브 프레임으로 갈수록 상기 데이터 어드레싱 속도를 빠르게 조절하는 단계인, OLED 표시장치의 구동방법. - 제 8 항에 있어서,
상기 데이터 어드레싱 속도를 조절하는 단계는,
서로 다른 펄스 주기를 갖는 다수의 게이트 쉬프트 클럭들을 입력받고, 각 서브 프레임의 시작 타이밍에 맞추어 상기 게이트 쉬프트 클럭들 중 어느 하나를 선택적으로 상기 표시패널 구동부에 출력하는 단계를 포함하는, OLED 표시장치의 구동방법. - 제 8 항에 있어서,
상기 한 프레임 내에는 마지막 번째 서브 프레임 이후에 더미 서브 프레임이 더 배치되고,
상기 더미 서브 프레임의 기간은 상기 표시패널의 상하 표시라인 별로 달라지는, OLED 표시장치의 구동방법. - 제 13 항에 있어서,
상기 더미 서브 프레임 동안 상기 픽셀들을 비 발광시키는 데이터전압이 상기 표시 패널에 인가되는, OLED 표시장치의 구동방법.
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