KR102494986B1 - 폴더블 표시장치 - Google Patents
폴더블 표시장치 Download PDFInfo
- Publication number
- KR102494986B1 KR102494986B1 KR1020160003273A KR20160003273A KR102494986B1 KR 102494986 B1 KR102494986 B1 KR 102494986B1 KR 1020160003273 A KR1020160003273 A KR 1020160003273A KR 20160003273 A KR20160003273 A KR 20160003273A KR 102494986 B1 KR102494986 B1 KR 102494986B1
- Authority
- KR
- South Korea
- Prior art keywords
- adhesive member
- bending
- mode
- display panel
- foldable display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000011084 recovery Methods 0.000 claims description 9
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- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 3
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- IYZMXHQDXZKNCY-UHFFFAOYSA-N 1-n,1-n-diphenyl-4-n,4-n-bis[4-(n-phenylanilino)phenyl]benzene-1,4-diamine Chemical compound C1=CC=CC=C1N(C=1C=CC(=CC=1)N(C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 IYZMXHQDXZKNCY-UHFFFAOYSA-N 0.000 description 2
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- STTGYIUESPWXOW-UHFFFAOYSA-N 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline Chemical compound C=12C=CC3=C(C=4C=CC=CC=4)C=C(C)N=C3C2=NC(C)=CC=1C1=CC=CC=C1 STTGYIUESPWXOW-UHFFFAOYSA-N 0.000 description 2
- GEQBRULPNIVQPP-UHFFFAOYSA-N 2-[3,5-bis(1-phenylbenzimidazol-2-yl)phenyl]-1-phenylbenzimidazole Chemical compound C1=CC=CC=C1N1C2=CC=CC=C2N=C1C1=CC(C=2N(C3=CC=CC=C3N=2)C=2C=CC=CC=2)=CC(C=2N(C3=CC=CC=C3N=2)C=2C=CC=CC=2)=C1 GEQBRULPNIVQPP-UHFFFAOYSA-N 0.000 description 2
- IXHWGNYCZPISET-UHFFFAOYSA-N 2-[4-(dicyanomethylidene)-2,3,5,6-tetrafluorocyclohexa-2,5-dien-1-ylidene]propanedinitrile Chemical compound FC1=C(F)C(=C(C#N)C#N)C(F)=C(F)C1=C(C#N)C#N IXHWGNYCZPISET-UHFFFAOYSA-N 0.000 description 2
- HNWFFTUWRIGBNM-UHFFFAOYSA-N 2-methyl-9,10-dinaphthalen-2-ylanthracene Chemical compound C1=CC=CC2=CC(C3=C4C=CC=CC4=C(C=4C=C5C=CC=CC5=CC=4)C4=CC=C(C=C43)C)=CC=C21 HNWFFTUWRIGBNM-UHFFFAOYSA-N 0.000 description 2
- OBAJPWYDYFEBTF-UHFFFAOYSA-N 2-tert-butyl-9,10-dinaphthalen-2-ylanthracene Chemical compound C1=CC=CC2=CC(C3=C4C=CC=CC4=C(C=4C=C5C=CC=CC5=CC=4)C4=CC=C(C=C43)C(C)(C)C)=CC=C21 OBAJPWYDYFEBTF-UHFFFAOYSA-N 0.000 description 2
- ZVFQEOPUXVPSLB-UHFFFAOYSA-N 3-(4-tert-butylphenyl)-4-phenyl-5-(4-phenylphenyl)-1,2,4-triazole Chemical compound C1=CC(C(C)(C)C)=CC=C1C(N1C=2C=CC=CC=2)=NN=C1C1=CC=C(C=2C=CC=CC=2)C=C1 ZVFQEOPUXVPSLB-UHFFFAOYSA-N 0.000 description 2
- DHDHJYNTEFLIHY-UHFFFAOYSA-N 4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=CN=C21 DHDHJYNTEFLIHY-UHFFFAOYSA-N 0.000 description 2
- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 2
- AOQKGYRILLEVJV-UHFFFAOYSA-N 4-naphthalen-1-yl-3,5-diphenyl-1,2,4-triazole Chemical compound C1=CC=CC=C1C(N1C=2C3=CC=CC=C3C=CC=2)=NN=C1C1=CC=CC=C1 AOQKGYRILLEVJV-UHFFFAOYSA-N 0.000 description 2
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- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 2
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- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 2
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- 239000000654 additive Substances 0.000 description 2
- UFVXQDWNSAGPHN-UHFFFAOYSA-K bis[(2-methylquinolin-8-yl)oxy]-(4-phenylphenoxy)alumane Chemical compound [Al+3].C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC([O-])=CC=C1C1=CC=CC=C1 UFVXQDWNSAGPHN-UHFFFAOYSA-K 0.000 description 2
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Inorganic materials [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 description 2
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- UEEXRMUCXBPYOV-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UEEXRMUCXBPYOV-UHFFFAOYSA-N 0.000 description 2
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- SPDPTFAJSFKAMT-UHFFFAOYSA-N 1-n-[4-[4-(n-[4-(3-methyl-n-(3-methylphenyl)anilino)phenyl]anilino)phenyl]phenyl]-4-n,4-n-bis(3-methylphenyl)-1-n-phenylbenzene-1,4-diamine Chemical compound CC1=CC=CC(N(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)N(C=2C=C(C)C=CC=2)C=2C=C(C)C=CC=2)C=2C=C(C)C=CC=2)=C1 SPDPTFAJSFKAMT-UHFFFAOYSA-N 0.000 description 1
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- QYNTUCBQEHUHCS-UHFFFAOYSA-N 4-n-(3-methylphenyl)-1-n-[4-[4-(n-[4-(n-(3-methylphenyl)anilino)phenyl]anilino)phenyl]phenyl]-1-n,4-n-diphenylbenzene-1,4-diamine Chemical compound CC1=CC=CC(N(C=2C=CC=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=C(C)C=CC=2)=C1 QYNTUCBQEHUHCS-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 본 발명의 일 실시예에 따른 폴더블 표시장치가 펼쳐진 상태의 개략적인 사시도이다.
도 3a는 본 발명의 일 실시예에 따른 폴더블 표시장치를 개략적으로 나타낸 사시도이다.
도 3b는 본 발명의 일 실시예에 따른 폴더블 표시장치에 포함되는 화소들 중 하나의 회로도이다.
도 3c는 본 발명의 일 실시예에 따른 폴더블 표시장치에 포함되는 화소들 중 하나를 나타낸 평면도이다.
도 3d는 도 3b의 Ⅰ-Ⅰ'선에 대응하여 개략적으로 나타낸 단면도이다.
도 4a는 본 발명의 일 실시예에 따른 폴더블 표시장치가 벤딩(bending)된 상태의 개략적인 단면도이다.
도 4b는 본 발명의 일 실시예에 따른 폴더블 표시장치가 펼쳐진 상태의 개략적인 단면도이다.
도 4c는 폴더블 표시장치의 잔류 변형율이 높을 때의 문제점을 설명하기 위한 도면이다.
도 5a는 본 발명의 일 실시예에 따른 폴더블 표시장치가 벤딩(bending)된 상태의 개략적인 사시도이다.
도 5b는 본 발명의 일 실시예에 따른 폴더블 표시장치가 펼쳐진 상태의 개략적인 사시도이다.
도 6a는 본 발명의 일 실시예에 따른 폴더블 표시장치가 벤딩(bending)된 상태의 개략적인 사시도이다.
도 6b는 본 발명의 일 실시예에 따른 폴더블 표시장치가 펼쳐진 상태의 개략적인 사시도이다.
도 7a는 본 발명의 일 실시예에 따른 폴더블 표시장치가 벤딩(bending)된 상태의 개략적인 사시도이다.
도 7b는 본 발명의 일 실시예에 따른 폴더블 표시장치가 펼쳐진 상태의 개략적인 사시도이다.
비교예 1 | 비교예 2 | 비교예 3 | 실시예 1 | |
60℃에서의 저장 탄성률 |
3.3ⅹ104 Pa | 4.0ⅹ104 Pa | 4.2ⅹ104 Pa | 5.0ⅹ104 |
미세 기포 발생 유무 | O | O | O | X |
비교예 4 | 실시예 2 | ||||
제1 접착 부재 | 제2 접착 부재 | 제1 접착 부재 | 제2 접착 부재 | ||
두께(㎛) | 100 | 50 | 50 | 50 | |
모듈러스 (Pa) |
-20℃ | 9.0ⅹ104 | 1.3ⅹ105 | 2.2ⅹ105 | 9.0ⅹ104 |
60℃ | 5.0ⅹ104 | 4.0ⅹ104 | 3.5ⅹ104 | 5.0ⅹ104 | |
응력완화율(%) | 50 | 44 | 47 | 50 | |
층간 박리 발생 여무 | 벤딩된 상태에서 24시간 내에 박리 발생 O | 벤딩된 상태를 240시간 이상 박리 발생 X |
제2 접착 부재 | 비교예 5 | 실시예 3 | |||
제1 접착 부재 | 제1 접착 부재 | ||||
두께(㎛) | 50 | 두께(㎛) | 50 | 50 | |
모듈러스 (Pa) |
-20℃ | 9.0ⅹ104 | 응력완화율 (%) |
0.53 | 0.47 |
60℃ | 5.0ⅹ104 | ||||
응력완화율(%) | 50 | ||||
층간 박리 발생 여부 | 벤딩된 상태에서 72시간 내에 박리 발생 O | 벤딩된 상태에서 240시간 이상 박리 발생 X |
비교예 6 | 비교예 7 | 비교예 8 | 실시예 4 | |
잔류 변형율(%) | 17 | 12 | 10 | 6.3 |
박리 발생 유무 | O | O | O | X |
POL: 편광 부재 AD2: 제2 접착 부재
WD: 윈도우
Claims (17)
- 표시 패널;
상기 표시 패널 상에 제공된 편광 부재;
상기 편광 부재 상에 제공된 윈도우;
상기 표시 패널 및 상기 편광 부재 사이에 제공된 제1 접착 부재; 및
상기 편광 부재 및 상기 윈도우 사이에 제공된 제2 접착 부재를 포함하고,
상기 표시 패널, 상기 편광 부재, 상기 윈도우, 상기 제1 접착 부재 및 상기 제2 접착 부재는 제1 모드에서 벤딩축을 기준으로 벤딩되며,
상기 제1 모드에서 상기 윈도우는 상기 표시 패널보다 상기 벤딩축에 인접하고,
상기 제1 접착 부재 및 상기 제2 접착 부재는 각각
-25℃에서 5ⅹ104 Pa 이상 5ⅹ105 Pa 이하의 저장 탄성률(storage modulus)을 가지며,
상기 제2 접착 부재는
60℃에서 4.5ⅹ104 Pa 이상 6.5ⅹ104 Pa 이하의 저장 탄성률을 갖고,
상기 제1 접착 부재는
40 초과 50 미만의 응력 완화율(stress-relaxation ratio)을 가지며,
상기 응력 완화율은 하기 식 1로 정의되는 것인 폴더블 표시장치:
[식 1]
응력 완화율(%) = 100 ⅹ G(t2)/G(t1)
상기 식 1에서,
G(t1)은 상기 제1 접착 부재를 600㎛로 제조한 상태에서 레오미터(Rheometer)로 응력완화 모드(stress-relaxation test)에서 평행판(parallelplate)을 이용하여 60℃에서 상기 제1 접착 부재에 25%의 변형(strain)을 가하고 100초 동안 유지한 후, 변형을 제거하였을 때 측정한 초기 응력 완화 탄성률이고,
G(t2)는 상기 제1 접착 부재를 300초 동안 유지한 후, 측정한 응력 완화 탄성률이다. - 제1항에 있어서,
상기 표시 패널, 상기 편광 부재, 상기 윈도우, 상기 제1 접착 부재 및 상기 제2 접착 부재는 제2 모드에서 펼쳐지는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 제1 접착 부재는
60℃에서 5 이상 8 이하의 잔류 변형율(residual strain)을 갖고,
상기 잔류 변형율은 하기 식 2로 정의되는 것인 폴더블 표시장치:
[식 2]
잔류 변형율(%) = L2/L1 X 100
상기 식 2에서,
L1은 상기 제1 접착 부재를 600㎛로 제조한 상태에서 레오미터(Rheometer)를 이용하여 60℃에서 상기 제1 접착 부재에 2000 Pa의 힘(Stress)을 가하여 1시간 유지하여 최대 변형(Strain)이 가해졌을 때의 최대 크리프 변형율(Creep Strain)이고,
L2는 최대 크리프 변형율이 생긴 후 가해진 힘을 제거하여 회복되는 탄성 회복 스트레인(Elastic recovery strain) 외에 회복되지 못하고 남아있는 잔류 변형 스트레인(Residual recovery strain)이다. - 제1항에 있어서,
상기 제1 접착 부재는
25㎛ 이상 100㎛ 이하의 두께를 갖는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 제2 접착 부재는
25㎛ 이상 100㎛ 이하의 두께를 갖는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 제1 접착 부재는
800 이상의 박리력(gf/in)을 갖는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 제2 접착 부재는
800 이상의 박리력(gf/in)을 갖는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 제1 접착 부재는
제1 실리콘계 베이스 중합체, 제1 접착 부여제 및 제1 가교제를 포함하고,
상기 제2 접착 부재는
제2 실리콘계 베이스 중합체, 제2 접착 부여제 및 제2 가교제를 포함하는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 표시 패널의 하부에 제공된 보호 필름; 및
상기 표시 패널 및 상기 보호 필름 사이에 제공된 제3 접착 부재를 더 포함하고,
상기 보호 필름 및 상기 제3 접착 부재는 제1 모드에서 벤딩축을 기준으로 벤딩되고, 제2 모드에서 펼쳐지는 것인 폴더블 표시장치. - 제9항에 있어서,
상기 제3 접착 부재의 두께는
상기 제1 접착 부재 및 상기 제2 접착 부재 각각의 두께보다 얇은 것인 폴더블 표시장치. - 제9항에 있어서,
상기 제3 접착 부재는
-25℃에서 5ⅹ104 Pa 이상 5ⅹ105 Pa 이하의 저장 탄성률(storage modulus)을 갖는 것인 폴더블 표시장치. - 제1항에 있어서,
상기 편광 부재 및 상기 윈도우 사이에 제공된 터치 센싱 유닛을 더 포함하고,
상기 터치 센싱 유닛은 제1 모드에서 벤딩축을 기준으로 벤딩되고, 제2 모드에서 펼쳐지는 것인 폴더블 표시장치. - 제12항에 있어서,
상기 편광 부재 및 상기 터치 센싱 유닛 사이에 제공된 제4 접착 부재를 더 포함하고,
상기 제4 접착 부재는 제1 모드에서 벤딩축을 기준으로 벤딩되고, 제2 모드에서 펼쳐지는 것인 폴더블 표시장치. - 제13항에 있어서,
상기 제4 접착 부재의 두께는
상기 제1 접착 부재 및 상기 제2 접착 부재 각각의 두께보다 얇은 것인 폴더블 표시장치. - 제13항에 있어서,
상기 제4 접착 부재는
-25℃에서 5ⅹ104 Pa 이상 5ⅹ105 Pa 이하의 저장 탄성률(storage modulus)을 갖는 것인 폴더블 표시장치. - 제12항에 있어서,
상기 터치 센싱 유닛은 상기 편광 부재와 직접 접하는 것인 폴더블 표시장치. - 표시 패널;
상기 표시 패널 상에 제공된 편광 부재;
상기 편광 부재 상에 제공된 윈도우;
상기 표시 패널 및 상기 편광 부재 사이에 제공된 제1 접착 부재; 및
상기 편광 부재 및 상기 윈도우 사이에 제공된 제2 접착 부재를 포함하고,
상기 표시 패널, 상기 편광 부재, 상기 윈도우, 상기 제1 접착 부재 및 상기 제2 접착 부재는 제1 모드에서 벤딩축을 기준으로 벤딩되며,
상기 제1 모드에서 상기 윈도우는 상기 표시 패널보다 상기 벤딩축에 인접하고,
상기 제1 접착 부재 및 상기 제2 접착 부재는 각각
-25℃에서 5x104 Pa 이상 5x105 Pa 이하의 저장 탄성률(storage modulus)을 가지며,
상기 제1 접착 부재는
40 초과 50 미만의 응력 완화율(stress-relaxation ratio)을 가지며,
상기 응력 완화율은 하기 식 1로 정의되는 것인 폴더블 표시장치:
[식 1]
응력 완화율(%) = 100 x G(t2)/G(t1)
상기 식 1에서,
G(t1)은 상기 제1 접착 부재를 600㎛로 제조한 상태에서 레오미터(Rheometer)로 응력완화 모드(stress-relaxation test)에서 평행판(parallelplate)을 이용하여 60℃에서 상기 제1 접착 부재에 25%의 변형(strain)을 가하고 100초 동안 유지한 후, 변형을 제거하였을 때 측정한 초기 응력 완화 탄성률이고,
G(t2)는 상기 제1 접착 부재를 300초 동안 유지한 후, 측정한 응력 완화 탄성률이다.
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