KR102197976B1 - 전기 광학 디스플레이들을 구동하기 위한 방법들 - Google Patents
전기 광학 디스플레이들을 구동하기 위한 방법들 Download PDFInfo
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- KR102197976B1 KR102197976B1 KR1020187002861A KR20187002861A KR102197976B1 KR 102197976 B1 KR102197976 B1 KR 102197976B1 KR 1020187002861 A KR1020187002861 A KR 1020187002861A KR 20187002861 A KR20187002861 A KR 20187002861A KR 102197976 B1 KR102197976 B1 KR 102197976B1
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Abstract
Description
도 2 는 이웃하는 픽셀들에 대한 BPPWWTDS 의 이용에 의하여, 픽셀들의 블록을 흑색으로 구동하고, 그 다음으로, 픽셀들의 동일한 블록을 백색으로 구동한 후에 관찰된 에지 아티팩트들을 예시하는 현미경사진이다.
도 3 은 종래 기술의 BPPWWTDS 를 이용한 업데이트들의 수의 함수로서 백색 상태 명도를 예시한다.
도 4 는 백색-대-백색 전이들을 위한 BPPTOPWWTDS 파형에 대한 시간 대 전압 곡선이다.
도 5 는 도 2 의 현미경사진과 유사하지만, 본 발명의 BPPTOPWWTDS 를 이용한 현미경사진이다.
도 6 은 도 3 의 그래프와 유사하지만, 종래 기술의 BPPWWTDS 및 본 발명의 BPPTOPWWTDS 양자를 이용하여 얻어진 결과들을 도시하는 그래프이다.
도 7 은 본 발명의 다양한 BPPTOPWWTDS 를 이용한 업데이트들의 수의 함수로서, 초기 백색 상태 명도 레벨로부터 24 개의 업데이트들 후에 얻어진 백색 상태 명도 변동을 도시하는 그래프이다.
도 8 은 본 발명의 BPPTOPWWTDS 를 이용한 50,000 개를 초과하는 업데이트들 후에 얻어진 그레이 레벨들을 도시하는 그래프이다.
이미 언급된 바와 같이, 도 9a 는 디스플레이 상의 텍스트 이미지의 부분을 도시한다.
도 9a 는 도 9a 의 텍스트 이미지 상부에 메뉴를 오버레이하는 효과를 예시한다.
도 9c 는 도 9b 에서 도시된 메뉴의 추후의 제거로부터 기인하는 이미지를 예시한다.
도 10a 는 디스플레이 상의 텍스트 이미지를 도시한다.
도 10b 는 도 10a 의 텍스트 이미지 상부에 아이콘을 오버레이하는 효과를 예시한다.
도 10c 는 도 10b 에서 도시된 아이콘의 추후의 제거로부터 기인하는 이미지를 예시한다.
도 11a 내지 도 11c 는 아이콘을 둘러싸는 구역들을 각각 예시하는 도 10a 내지 도 10c 의 부분들의 확대된 버전들이다.
도 12a 내지 도 12c 는 본 발명의 오버레이 방법을 도 11a 내지 도 11c 에서 각각 도시된 전이들에 적용함에 있어서 이용된 마스크들을 도시한다.
도 13 은 백색 픽셀들에 대한 시간 대 백색 상태 반사율의 그래프이고, 본 발명의 드리프트 보상 방법에 의해 감소되거나 제거될 수도 있는 문제인, 배경 픽셀에서의 전형적인 백색 상태 드리프트를 도시한다.
도 14 는 도 13 에서 도시된 것과 같은 백색 상태 드리프트에 의해 야기된 고스팅 효과들에 의해 영향받은 디스플레이 상의 이미지를 도시한다.
도 15 는 본 발명의 드리프트 보상 방법에서 이용하기 위해 적당한 파형을 도시한다.
도 16a 및 도 16b 는 드리프트 보상 방법의 하나의 단계가 적용되어야 할 배경 픽셀들의 구역들을 도시하는 픽셀들 맵들이고, 도 16a 는 예시된 구역에서의 배경 픽셀들 중의 12.5 퍼센트까지의 단계의 적용을 도시하고, 도 16b 는 100 퍼센트까지의 단계의 적용을 도시한다.
도 17 은 본 발명의 바람직한 드리프트 보상 방법의 구현예를 도시하는 흐름도이다.
도 18 은 도 13 의 그래프와 유사하지만, 수정되지 않은 픽셀에 대한 곡선에 추가하여, 본 발명에 따른 드리프트 보상의 2 개의 상이한 방법들에 대한 곡선들을 도시하는 그래프이다.
도 19a 및 도 19b 는 도 14 의 이미지들과 유사한 이미지들이고, 도 19a 는 수정되지 않은 이미지이고, 도 19b 는 발명의 드리프트 보상 방법에 의해 수정된 이미지이다.
도 20 은 도 18 의 그래프와 유사한 그래프이고, 다시, 수정되지 않은 픽셀들 및 수정된 픽셀들 양자에 대한 곡선들을 도시한다.
도 21 은 수정되지 않은 픽셀들과, 발명의 드리프트 보상 방법을 이용하여 수정된 픽셀들 양자에 대한 (사이클들의 수로서 표현된) 시간 대 나머지 전압의 그래프이다.
Claims (5)
- 각각이 2 개의 극단적인 광학적 상태들을 디스플레이할 수 있는 복수의 픽셀들을 가지는 쌍안정 전기 광학 디스플레이를 구동하는 방법으로서,
상기 디스플레이 상에 제 1 이미지를 기록하는 단계;
상기 디스플레이 상에 제 2 이미지를 기록하는 단계로서, 상기 제 1 및 제 2 이미지들의 양자에서 동일한 극단적인 광학적 상태에 있는 복수의 배경 픽셀들이 구동되지 않는 구동 방식을 이용하여, 상기 제 2 이미지를 기록하는 단계;
시간의 주기 동안에 상기 디스플레이를 구동되지 않는 상태로 둠으로써, 상기 배경 픽셀들이 그 극단적인 광학적 상태와는 상이한 광학적 상태를 취하는 것을 허용하는 단계;
상기 시간의 주기 이후, 제 1 비제로 비율의 상기 배경 픽셀들에, 리프레시 펄스 (refresh pulse) 를 인가하는 단계로서, 상기 리프레시 펄스가 인가되는 상기 픽셀들을 그 극단적인 광학적 상태로 실질적으로 복원시키며, 상기 리프레시 펄스가 상기 제 1 비제로 비율의 배경 픽셀들 이외의 상기 배경 픽셀들에 인가되지 않는, 상기 제 1 비제로 비율의 상기 배경 픽셀들에 상기 리프레시 펄스를 인가하는 단계; 및
이후, 상기 제 1 비제로 비율과는 상이한 제 2 비제로의 작은 비율의 상기 배경 픽셀들에, 리프레시 펄스를 인가하는 단계로서, 상기 리프레시 펄스가 인가되는 상기 픽셀들을 그 극단적인 광학적 상태로 실질적으로 복원시키며, 상기 리프레시 펄스가 상기 제 2 비제로 비율의 배경 픽셀들 이외의 상기 배경 픽셀들에 인가되지 않는, 상기 제 2 비제로의 작은 비율의 상기 배경 픽셀들에 상기 리프레시 펄스를 인가하는 단계를 포함하는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항에 있어서,
상기 디스플레이에는, 상이한 비제로 비율들의 상기 배경 픽셀들로의 상기 리프레시 펄스들의 연속적인 인가들 사이의 최소 시간 간격을 설정하는 타이머가 제공되는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항에 있어서,
상기 리프레시 펄스들은 백색의 극단적인 광학적 상태에 있는 배경 픽셀들에 인가되는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항의 방법을 수행하도록 배열된, 디스플레이 제어기.
- 제 1 항의 방법을 수행하도록 배열된, 전기 광학 디스플레이.
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