KR20110118182A - 광 확산 소자, 광 확산 소자 부착 편광판, 및 이들을 사용한 액정 표시 장치, 그리고 광 확산 소자의 제조 방법 - Google Patents
광 확산 소자, 광 확산 소자 부착 편광판, 및 이들을 사용한 액정 표시 장치, 그리고 광 확산 소자의 제조 방법 Download PDFInfo
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- KR20110118182A KR20110118182A KR1020117023039A KR20117023039A KR20110118182A KR 20110118182 A KR20110118182 A KR 20110118182A KR 1020117023039 A KR1020117023039 A KR 1020117023039A KR 20117023039 A KR20117023039 A KR 20117023039A KR 20110118182 A KR20110118182 A KR 20110118182A
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Abstract
본 발명의 광 확산 소자는, 수지 성분 및 초미립자 성분을 함유하는 매트릭스와, 그 매트릭스 중에 분산된 광 확산성 미립자를 갖고 ; 그 수지 성분, 그 초미립자 성분 및 그 광 확산성 미립자가 하기 식 (1) 을 만족시키고 ; 그 매트릭스와 그 광 확산성 미립자의 계면 근방에 형성되며, 그 광 확산성 미립자로부터 멀어짐에 따라 그 수지 성분의 중량 농도가 낮아져 그 초미립자 성분의 중량 농도가 높아지는 농도 변조 영역을 갖는다 :
|nP - nA| < |nP - nB| … (1)
식 (1) 중, nA 는 매트릭스의 수지 성분의 굴절률을 나타내고, nB 는 매트릭스의 초미립자 성분의 굴절률을 나타내며, nP 는 광 확산성 미립자의 굴절률을 나타낸다.
Description
도 1b 는, 본 발명의 다른 실시형태에 의한 광 확산 소자에 있어서의 매트릭스의 수지 성분 및 초미립자 성분, 그리고 광 확산성 미립자의 분산 상태를 설명하기 위한 모식도이다.
도 2(a) 는, 도 1a 의 광 확산 소자에 있어서의 광 확산성 미립자 중심부에서부터 매트릭스까지의 굴절률 변화를 설명하기 위한 개념도이고, 도 2(b) 는, 도 1b 의 광 확산 소자에 있어서의 광 확산성 미립자 중심부에서부터 매트릭스까지의 굴절률 변화를 설명하기 위한 개념도이며, 도 2(c) 는, 종래의 광 확산 소자에 있어서의 미립자 중심부에서부터 매트릭스까지의 굴절률 변화를 설명하기 위한 개념도이다.
도 3 은, 본 발명에 사용되는 광 확산성 미립자에 있어서의 r1 및 r2 의 관계를 나타내는 모식도이다.
도 4 는, 정치(靜置) 시간이 상이한 도공액에 대하여, 건조 온도와 얻어지는 확산 반값각의 관계를 나타내는 그래프이다.
도 5 는, 본 발명의 바람직한 실시형태에 의한 광 확산 소자 부착 편광판의 개략 단면도이다.
도 6 은, 본 발명의 바람직한 실시형태에 의한 액정 표시 장치의 개략 단면도이다.
도 7 은, 광 확산 반값각을 산출하는 방법을 설명하기 위한 모식도이다.
도 8 은, 실시예 1, 4 및 5 의 광 확산 소자에 대하여 농도 변조 영역의 유무를 확인하는 투과형 현미경 사진이다.
도 9 는, 실시예 6 ∼ 8 의 광 확산 소자에 대하여 농도 변조 영역의 유무를 확인하는 투과형 현미경 사진이다.
도 10 은, 비교예 1 의 광 확산 소자에 대하여 농도 변조 영역의 유무를 확인하는 투과형 현미경 사진이다.
도 11 은, 실시예 1, 비교예 2 및 비교예 3 의 광 확산 소자를 액정 표시 장치에 장착한 경우의 표시 상태를 비교하여 설명하기 위한 사진이다.
11 : 수지 성분
12 : 초미립자 성분
20 : 광 확산성 미립자
31 : 농도 변조 영역 (제 1 농도 변조 영역)
32 : 제 2 농도 변조 영역
100 : 광 확산 소자
110 : 편광자
120 : 보호층
130 : 보호층
200 : 광 확산 소자 부착 편광판
500 : 액정 표시 장치
Claims (18)
- 수지 성분 및 초미립자 성분을 함유하는 매트릭스와, 상기 매트릭스 중에 분산된 광 확산성 미립자를 갖고,
상기 수지 성분, 상기 초미립자 성분 및 상기 광 확산성 미립자는, 그들의 굴절률이 하기 식 (1) 을 만족시키고,
상기 광 확산성 미립자의 표면 근방 외부에 형성되며, 상기 광 확산성 미립자로부터 멀어짐에 따라 상기 수지 성분의 중량 농도가 낮아져 상기 초미립자 성분의 중량 농도가 높아지는 농도 변조 영역을 갖는, 광 확산 소자 :
|nP - nA| < |nP - nB| … (1)
식 (1) 중, nA 는 매트릭스의 수지 성분의 굴절률을 나타내고, nB 는 매트릭스의 초미립자 성분의 굴절률을 나타내며, nP 는 광 확산성 미립자의 굴절률을 나타낸다. - 제 1 항에 있어서,
상기 광 확산성 미립자의 표면 근방 내부에 상기 수지 성분이 침투하여 형성된 제 2 농도 변조 영역을 추가로 갖는, 광 확산 소자. - 제 1 항 또는 제 2 항에 있어서,
헤이즈가 90 % ∼ 99 % 인, 광 확산 소자. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
0.01 ≤ |nP - nA| ≤ 0.10, 및 0.10 ≤ |nP - nB| ≤ 1.50 을 만족시키는, 광 확산 소자. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 수지 성분 및 상기 광 확산성 미립자가 동일계의 재료로 구성되고, 상기 초미립자 성분이 상기 수지 성분 및 상기 광 확산성 미립자와는 상이한 계의 재료로 구성되어 있는, 광 확산 소자. - 제 5 항에 있어서,
상기 수지 성분 및 상기 광 확산성 미립자가 유기 화합물로 구성되고, 상기 초미립자 성분이 무기 화합물로 구성되어 있는, 광 확산 소자. - 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,
상기 광 확산성 미립자는, 평균 입경이 1 ㎛ ∼ 5 ㎛ 인, 광 확산 소자. - 제 1 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 초미립자 성분은, 평균 입경이 1 ㎚ ∼ 100 ㎚ 인, 광 확산 소자. - 제 1 항 내지 제 8 항 중 어느 한 항에 있어서,
광 확산 반값각이 10°∼ 150°인, 광 확산 소자. - 제 1 항 내지 제 9 항 중 어느 한 항에 기재된 광 확산 소자와 편광자를 갖는, 광 확산 소자 부착 편광판.
- 액정 셀과,
상기 액정 셀을 향하여 콜리메이트광을 출사하는 평행광 광원 장치와,
상기 액정 셀을 통과한 콜리메이트광을 투과 및 확산시키는 제 1 항 내지 제 9 항 중 어느 한 항에 기재된 광 확산 소자를 구비하는, 액정 표시 장치. - 제 1 항 내지 제 9 항 중 어느 한 항에 기재된 광 확산 소자의 제조 방법으로서,
매트릭스의 수지 성분 또는 그 전구체와 초미립자 성분과 광 확산성 미립자를 휘발성 용제 중에 용해 또는 분산시킨 도공액을 기재에 도포하는 공정과,
상기 기재에 도포된 도공액을 건조시키는 공정을 포함하는, 광 확산 소자의 제조 방법. - 제 12 항에 있어서,
상기 도공액에 있어서, 상기 수지 성분의 전구체와 상기 광 확산성 미립자를 접촉시키는 공정과, 상기 전구체의 적어도 일부를 상기 광 확산성 미립자의 내부에 침투시키는 공정을 추가로 포함하는, 광 확산 소자의 제조 방법. - 제 13 항에 있어서,
상기 도공액에 있어서, 상기 광 확산성 미립자의 입경이 실질적으로 최대가 될 때까지의 시간보다 긴 시간, 상기 수지 성분의 전구체와 상기 광 확산성 미립자를 접촉시키는, 광 확산 소자의 제조 방법. - 제 13 항 또는 제 14 항에 있어서,
상기 침투 공정에 있어서, 상기 광 확산성 미립자의 표면에서부터 상기 광 확산성 미립자의 평균 입경의 10 % 이상 95 % 이하의 범위까지 상기 전구체를 침투시키는, 광 확산 소자의 제조 방법. - 제 12 항 내지 제 15 항 중 어느 한 항에 있어서,
상기 도포 공정 후에 상기 전구체를 중합시키는 공정을 추가로 포함하는, 광 확산 소자의 제조 방법. - 제 16 항에 있어서,
상기 중합 공정에 있어서, 상기 광 확산성 미립자 내부에 침투한 전구체와 상기 광 확산성 미립자에 침투하지 않은 전구체를 동시에 중합하여, 상기 광 확산성 미립자의 표면 근방 내부에 상기 제 2 농도 변조 영역을 형성함과 동시에, 상기 매트릭스 및 상기 제 1 농도 변조 영역을 형성하는, 광 확산 소자의 제조 방법. - 제 16 항 또는 제 17 항에 있어서,
상기 수지 성분이 전리선 경화형 수지이며, 전리선을 조사함으로써 상기 수지 성분의 전구체를 중합시키는, 광 확산 소자의 제조 방법.
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- 2010-03-15 KR KR1020117023039A patent/KR101113634B1/ko not_active Expired - Fee Related
- 2010-03-15 US US13/255,062 patent/US8405794B2/en not_active Expired - Fee Related
- 2010-03-15 EP EP10753482.8A patent/EP2397872B1/en not_active Not-in-force
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Also Published As
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US8405794B2 (en) | 2013-03-26 |
CN102356334B (zh) | 2014-06-11 |
TW201038979A (en) | 2010-11-01 |
JP2010250295A (ja) | 2010-11-04 |
CN102356334A (zh) | 2012-02-15 |
TWI359958B (ko) | 2012-03-11 |
WO2010106990A1 (ja) | 2010-09-23 |
EP2397872B1 (en) | 2013-12-25 |
JP4756099B2 (ja) | 2011-08-24 |
KR101113634B1 (ko) | 2012-04-17 |
US20110317099A1 (en) | 2011-12-29 |
EP2397872A4 (en) | 2012-03-07 |
EP2397872A1 (en) | 2011-12-21 |
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