Compensators for liquid crystal displays with biaxially stretched single film with crystallization modifier
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G02F-001/1335
G02F-001/13
출원번호
US-0365332
(2003-02-12)
등록번호
US-7405784
(2008-07-29)
발명자
/ 주소
Roska,Fred J.
Allen,Richard C.
Johnson,Matthew B.
Rhyner,Steven J.
Merrill,William W.
Strobel,Joan M.
Hamer,Kevin M.
Gilligan,Gregory E.
출원인 / 주소
3M Innovative Properties Company
인용정보
피인용 횟수 :
2인용 특허 :
94
초록▼
An optical stack includes a first liquid crystal layer and a j-retarder disposed on the liquid crystal layer. The j-retarder includes a simultaneous biaxally stretched polymeric film being substantially non-absorbing and non-scattering for at least one polarization state of visible light. The j-reta
An optical stack includes a first liquid crystal layer and a j-retarder disposed on the liquid crystal layer. The j-retarder includes a simultaneous biaxally stretched polymeric film being substantially non-absorbing and non-scattering for at least one polarization state of visible light. The j-retarder has x, y, and z orthogonal indices of refraction where at least two of the orthogonal indices of refraction are not equal, an in-plane retardance being 100 nm or less and an out-of-plane retardance being 50 nm or greater.
대표청구항▼
We claim: 1. An optical stack comprising: a) a polarizer layer; and b) a simultaneous biaxally stretched polymeric film, wherein said film is a single layer, said single layer comprising a crystallization modifier and said single layer has the properties of being substantially non-absorbing and non
We claim: 1. An optical stack comprising: a) a polarizer layer; and b) a simultaneous biaxally stretched polymeric film, wherein said film is a single layer, said single layer comprising a crystallization modifier and said single layer has the properties of being substantially non-absorbing and non-scattering for at least one polarization state of visible light, the biaxally stretched polymeric film having x, y, and z orthogonal indices of refraction wherein at least two of the orthogonal indices of refraction are not equal, an in-plane retardance being 100 nm or less and an out-of-plane retardance being 50 nm or greater. 2. The optical stack according to claim 1, wherein the polarizer layer is an absorbing polarizer layer. 3. The optical stack according to claim 2, further comprising a reflecting polarizer layer wherein the absorbing polarizer layer is disposed between the simultaneous biaxally stretched polymeric film and the reflecting polarizer layer. 4. The optical stack according to claim 1, wherein the polarizer layer is a reflecting polarizer layer. 5. The optical stack according to claim 1, wherein the simultaneous biaxally stretched polymeric film has a thickness of 10 micrometers to 50 micrometers and an out-of-plane retardance being 75 nm or greater. 6. The optical stack according to claim 1, wherein the simultaneous biaxally stretched polymeric film has an in-plane retardance of 50 nm or less. 7. The optical stack according to claim 1, wherein the simultaneous biaxally stretched polymeric film has an in-plane retardance of 30 nm or less. 8. The optical stack according to claim 1, wherein the polymeric film is formed from more than one polymer. 9. A liquid crystal display comprising a) a polarizer layer; b) a light modulating device; and c) a simultaneous biaxally stretched polyolefin film, wherein said film is a single layer, said single layer comprises a crystallization modifier and said single layer has the properties of being substantially non-absorbing and non-scattering for at least one polarization state of visible light; and having x, y, and z orthogonal indices of refraction wherein at least two of the orthogonal indices of refraction are not equal, an in-plane retardance being 100 nm or less and an out-of-plane retardance being 50 nm or greater. 10. The liquid crystal display according to claim 9, wherein the polarizer layer is an absorbing polarizer layer. 11. The liquid crystal display according to claim 10, further comprising a reflecting polarizer layer wherein the absorbing polarizer layer is disposed between the reflecting polarizer layer and the simultaneous biaxally stretched polymeric film. 12. The liquid crystal display according to claim 9, wherein the polarizer layer is a reflecting polarizer layer. 13. The liquid crystal display according to claim 9, wherein the simultaneous biaxally stretched polymeric film has a thickness of 10 micrometers to 50 micrometers and an out-of-plane retardance being 75 nm or greater. 14. An optical stack comprising: a) a polarizer layer; and b) a simultaneous biaxally stretched polymeric film, wherein said film is a single layer, said single aver comprising a non-cyclic polyolefin polymer and said single layer has the properties of being substantially non-absorbing and non-scattering for at least one polarization state of visible light, the simultaneous biaxally stretched polymeric film having x, y, and z orthogonal indices of refraction wherein at least two of the orthogonal indices of refraction are not equal, an in-plane retardance being 100 nm or less and an out-of-plane retardance being 50 nm or greater, wherein the simultaneous biaxally stretched polymeric film comprises a crystallization modifier. 15. The optical stack according to claim 14, wherein the noncyclic polyolefin polymer comprises polyproplyene. 16. The optical stack according to claim 14, wherein the polarizer layer is an absorbing polarizer layer. 17. The optical stack according to claim 14, wherein the simultaneous biaxally stretched polymeric film comprises a nucleating agent. 18. The optical stack according to claim 14, wherein the simultaneous biaxally stretched polymeric film has an in-plane retardance of 50 nm or less. 19. The optical stack according to claim 14, wherein the simultaneous biaxally stretched polymeric film has an in-plane retardance of 30 nm or less. 20. The optical stack according to claim 14, wherein the polymeric film is formed from more than one polymer.
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