KR102528299B1 - 위상차필름 및 이를 구비한 플렉서블 디스플레이 장치 - Google Patents
위상차필름 및 이를 구비한 플렉서블 디스플레이 장치 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 일 실시예에 따른 플렉서블 디스플레이 장치를 개략적으로 도시한 단면도이다.
도 3은 본 발명의 일 실시예에 따른 위상차필름을 개략적으로 도시한 단면도이다.
도 4는 본 발명의 일 실시예에 따른 위상차필름의 굴절률을 설명하기 위한 도면이다.
도 5a는 도 3의 위상차필름의 휘거나 접힌 모습을 도시한 단면도이다.
도 5b는 도 3의 위상차필름을 구비한 디스플레이 장치의 시야각에 따른 휘도 편차를 도시한 그래프이다.
도 6a는 비교예에 따른 위상차필름의 휘거나 접힌 모습을 도시한 단면도이다.
도 6b는 비교예에 따른 위상차필름을 구비한 디스플레이 장치의 시야각에 따른 휘도 편차를 도시한 그래프이다.
도 7은 본 발명의 다른 실시예에 따른 위상차필름을 도시한 단면도이다.
도 8은 본 발명의 또 다른 실시예에 따른 위상차필름을 도시한 단면도이다.
도 9는 본 발명의 또 다른 실시예에 따른 위상차필름을 도시한 단면도이다.
도 10은 본 발명의 또 다른 실시예에 따른 위상차필름을 도시한 단면도이다.
200: 디스플레이부 300: 봉지부
400: 광학필름부 410: 틸트 +C플레이트층
420: +A플레이트층 430: 편광층
R, R1, R2, R3, R4, R5: 위상차필름
Claims (17)
- 필름의 길이방향 축을 X축, 상기 X축에 수직한 필름의 폭방향 축을 Y축, 상기 X축 및 상기 Y축에 수직한 필름의 두께방향 축을 Z축이라 하고, 각각의 축방향 굴절률을 nx, ny, nz라 할 때,
nx≠ny<nz의 재질을 갖는 액정층을 구비한, 적층구조의 2m(m은 양의 정수)개의 틸트 +C플레이트들; 및
상기 2m개의 틸트 +C플레이트들 상에 배치되는 +A플레이트;를 구비하며,
상기 틸트 +C플레이트들의 면상 위상차 값은 0이 아니고, 두께방향 위상차 값은 양의 값을 가지고,
상기 액정층은 상기 Z축에 대하여 기울어진 장축을 갖는 액정분자들을 포함하고,
상기 2m개의 틸트 +C플레이트들 중에서, m개의 틸트 +C플레이트들의 액정분자들의 장축과, 나머지 m개의 틸트 +C플레이트들의 액정분자들의 장축은, 상기 X축에 대하여 서로 대칭을 이루는, 위상차필름. - 삭제
- 제 1 항에 있어서,
상기 액정층은 상기 Z축에 대하여 기울어지도록 배향된 코팅층인, 위상차필름. - 제 1 항에 있어서,
상기 +A플레이트는 상기 X축과 평행하도록 수평 배향된 수평액정층을 구비하는, 위상차필름. - 제 1 항에 있어서,
상기 +A플레이트는 사분파장판(quarter wave plate: λ/4 plate)인 위상차필름. - 제 1 항에 있어서,
상기 +A플레이트는 역파장 분산 특성(reverse wavelength dispersion)을 갖는 위상차필름. - 바나나형 액정분자들을 포함하는 액정층을 구비한, 적어도 하나의 틸트 +C플레이트; 및
상기 적어도 하나의 틸트 +C플레이트 상에 배치되는 +A플레이트;를 구비하며,
필름의 길이방향 축을 X축, 상기 X축에 수직한 필름의 폭방향 축을 Y축, 상기 X축 및 상기 Y축에 수직한 필름의 두께방향 축을 Z축이라 하고, 각각의 축방향 굴절률을 nx, ny, nz라 할 때,
상기 액정층은 nx≠ny<nz의 재질을 가지고, 상기 틸트 +C플레이트들의 면상 위상차 값은 0이 아니고, 두께방향 위상차 값은 양의 값을 가지고,
상기 적어도 하나의 틸트 +C플레이트는, 적층구조의 2m(m은 양의 정수)개의 플레이트들을 포함하고,
상기 2m개의 틸트 +C플레이트들 중에서, m개의 플레이트들의 바나나형 액정분자들의 굽은 방향과, 나머지 m개의 플레이트들의 바나나형 액정분자들의 굽은 방향이 서로 반대인, 위상차필름. - 제 7 항에 있어서,
상기 바나나형 액정분자들은, 상기 X축 방향으로 굽은 형상을 갖는 위상차필름. - 제 7 항에 있어서,
상기 바나나형 액정분자들은, 상기 X축과 평행하게 연장된 중심선을 대칭축으로 하는 선대칭 형상을 갖는 위상차필름. - 삭제
- 제 7 항에 있어서,
필름의 길이방향 축을 X축이라 할 때,
상기 +A플레이트는 상기 X축과 평행하도록 수평 배향된 수평액정층을 구비하는, 위상차필름. - 제 7 항에 있어서,
상기 +A플레이트는 사분파장판(quarter wave plate: λ/4 plate)인 위상차필름. - 제 7 항에 있어서,
상기 +A플레이트는 역파장 분산 특성을 갖는 위상차필름. - 기판;
상기 기판 상에 배치되어 휘거나 접힐 수 있고, 복수개의 유기발광소자들을 구비하는 디스플레이부;
상기 디스플레이부 상에 배치되는 편광필름; 및
상기 디스플레이부와 상기 편광필름 사이에 개재된 제1항, 제3항 내지 제9항, 및 제11항 내지 제13항 중 어느 한 항의 위상차필름;을 구비하는, 플렉서블 디스플레이 장치. - 제 14 항에 있어서,
상기 디스플레이부는 상기 유기발광소자들의 발광 방향으로 볼록해지도록 휘거나 접힐 수 있는, 플렉서블 디스플레이 장치. - 제 14 항에 있어서,
상기 디스플레이부의 휘거나 접히는 부분의 곡률중심은, 상기 편광필름보다 상기 디스플레이부에 더 인접한, 플렉서블 디스플레이 장치. - 제 14 항에 있어서,
상기 디스플레이부 상에 상기 2m개의 틸트 +C플레이트들이 위치하는, 플렉서블 디스플레이 장치.
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US12206061B2 (en) * | 2019-07-30 | 2025-01-21 | Apple Inc. | Electronic device having display with internal light reflection suppression |
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