32.3: Novel Optical Compensation Method Based upon a Discotic Optical Compensation Film for Wide‐Viewing‐Angle LCDs

Mori, Hiroyuki; Nagai, Masako; Nakayama, H.; Itoh, Y.; Kamada, Kei; Arakawa, Kohei; Kawata, Keisuke

doi:10.1889/1.1832470

Cited by 28 publications

(12 citation statements)

References 1 publication

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“…The DLC right next to the alignment layer has a high degree of randomness. However, the DLC in the vicinity of the alignment layer tends to align with the molecular plane parallel to the alignment layer surface with few degrees of pretilt angle in the alignment direction, while the DLC in the vicinity of the air surface tends to align with the molecular plane almost perpendicular to the air surface [72][73][74]. Therefore, the DLC exhibits a hybrid alignment structure.…”

Section: Polarizer Filmmentioning

confidence: 99%

Structure and application of polarizer film for thin-film-transistor liquid crystal displays

Jin

2011

Displays

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Section: Polarizer Filmmentioning

confidence: 99%

Structure and application of polarizer film for thin-film-transistor liquid crystal displays

Jin

2011

Displays

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“…Therefore, integrating (8) is not necessary, and , . The CR is thus simply the ratio of LC transmittance in the voltage-on and -off states nm nm nm nm (12) IV. LCD PERFORMANCES WITH QCBL AND EDF…”

Section: Lcd System Characterizationmentioning

confidence: 99%

“…The basic idea of phase compensation is to use an anisotropic optical film (or multiple films) to balance the extra or insufficient phase retardation caused by the LC layer and the light leakage of crossed polarizers at oblique angles. For example, the phase compensation films developed by Fuji Photo [12]- [14] and Samsung [15] are quite effective for TN and VA LCDs. There are also compensation films for blue phase [16] and IPS [17] LCDs.…”

mentioning

confidence: 99%

A High Performance Single-Domain LCD With Wide Luminance Distribution

Gao

Luo

Zhu

et al. 2015

J. Display Technol.

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In this paper, we review the device structures and present the simulation results of four single-domain LCDs with a quasi-collimated backlight and a free-form optics-engineered diffuser. Such a non-emissive LCD exhibits similar luminance distribution to an emissive OLED, while keeping high transmittance, high contrast ratio over a large (80 ) viewing cone, with low ambient reflection, indistinguishable color shift, and negligible off-axis grayscale distortion.Index Terms-Fringe field switching, in-plane switching, liquid crystal display (LCD), OLED-like luminance distribution, single domain.

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“…These alignment structures of the PDM layer allow us to develop optical compensation films for any LCD modes. (simplified and idealized description) [4] The technologies mentioned above allowed us to develop the WV film that remarkably widened the viewing angle of the TN mode [5] . A simplified structure of the WV film is illustrated in Fig.…”

Section: -2 Coating Layer Of the Polymerized Discotic Materials (Pdm)mentioning

confidence: 99%

High performance TAC film for LCDs

Mori

2006

SPIE Proceedings

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Tri-acetyl cellulose (TAC) films are widely used as a protective film for polarizers because it has high light transmittance, low birefringence, high moisture permeability, high uniformity and good curling property. This paper describes TAC film technologies, especially about the birefringence control of TAC film. Making use of the controlled birefringence, the TAC film comes to take an active role in optical compensation of LCDs as well as protection of polarizers. The out-of-plane birefringence of the TAC film can be controlled by additives, and the in-plane birefringence can be controlled by stretching. Coating a discotic material on the TAC film gives an additional optical compensation layer. With these technologies, we were able to develop an optical compensation film called WV film, which remarkably improves the viewing angle characteristics for TN-LCDs. Recently, we have developed and commercialized a new WV film for the OCB mode. OCB is known to have a very fast optical response time and promising as a next generation LCD-TV. The OCB-WV film has realized excellent viewing angle characteristics for OCB as well as a high on-axis contrast ratio. TAC film technologies open up possibilities of developing various types of optical compensation films suited for all LCD modes.

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32.3: Novel Optical Compensation Method Based upon a Discotic Optical Compensation Film for Wide‐Viewing‐Angle LCDs

Cited by 28 publications

References 1 publication

Structure and application of polarizer film for thin-film-transistor liquid crystal displays

Structure and application of polarizer film for thin-film-transistor liquid crystal displays

A High Performance Single-Domain LCD With Wide Luminance Distribution

High performance TAC film for LCDs

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