KR20170043677A - 전기 광학 디스플레이들을 구동하기 위한 방법들 - Google Patents
전기 광학 디스플레이들을 구동하기 위한 방법들 Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
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- G09G2300/0473—Use of light emitting or modulating elements having two or more stable states when no power is applied
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- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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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 (15)
- 복수의 픽셀들을 가지는 쌍안정 전기 광학 디스플레이를 구동하는 방법으로서,
백색-대-백색 전이를 겪고, 용이하게 가시적인 전이를 겪는 적어도 하나의 다른 픽셀에 인접하게 놓여 있는 픽셀에서, 하나 이상의 균형잡힌 펄스 쌍들 및 적어도 하나의 탑-오프 (top-off) 펄스가 상기 픽셀에 인가되고,
각각의 균형잡힌 펄스 쌍은, 상기 균형잡힌 펄스 쌍의 순 임펄스가 실질적으로 제로가 되도록 반대의 극성들인 한 쌍의 구동 펄스들을 포함하는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항에 있어서,
하나 이상의 균형잡힌 펄스 쌍들 및 적어도 하나의 탑-오프 펄스의 조합은, 상기 디스플레이가 미리 결정된 온도를 초과할 때에만 인가되는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항에 있어서,
상기 탑-오프 펄스는 단일 백색 진행 구동 펄스를 포함하는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항에 있어서,
단일 탑-오프 펄스만이 상기 픽셀에 인가되는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 1 항의 방법을 수행하도록 배열된, 디스플레이 제어기.
- 쌍안정 전기 광학 디스플레이를 구동하는 방법으로서,
사전에 존재하는 텍스트 또는 이미지 내용 상부에 비직사각형 항목을 오버레이하고, 이후 상기 항목을 제거하는 단계를 포함하고,
상기 항목의 영역에서의 픽셀들만이 (자체 전이들을 포함하는) 전이들을 수행하는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 6 항에 있어서,
상기 항목은 적어도 하나의 투명 영역을 포함하고, 상기 항목의 비투명 영역들에서의 픽셀들만이 (자체 전이들을 포함하는) 전이들을 수행하는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 6 항 또는 제 7 항의 방법을 수행하도록 배열된, 디스플레이 제어기.
- 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 9 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 9 항에 있어서,
상기 리프레시 펄스들은 백색의 극단적인 광학적 상태에서 픽셀들에 인가되는, 쌍안정 전기 광학 디스플레이를 구동하는 방법. - 제 9 항의 방법을 수행하도록 배열된, 디스플레이 제어기.
- 제 1 항의 방법을 수행하도록 배열된, 전기 광학 디스플레이.
- 제 6 항 또는 제 7 항의 방법을 수행하도록 배열된, 전기 광학 디스플레이.
- 제 9 항의 방법을 수행하도록 배열된, 전기 광학 디스플레이.
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