41.1: Distinguished Paper: The World's First Photo Alignment LCD Technology Applied to Generation Ten Factory

Miyachi, Koichi; Kobayashi, Kazuki; Yamada, Y.; Mizushima, Shigeaki

doi:10.1889/1.3500533

Cited by 98 publications

(77 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LCMO-VA allows manufacturing of advanced new generation LCD-TV panels with reduced manufacturing costs and low energy consumption [8,9]. The transmittance, contrast ratio and response time of LCD-TV are drastically improved compared to conventional MVA [8]. …”

Section: Alignment Mechanism and Performances Of Lcmo-va Technologymentioning

confidence: 99%

“…LCMO-VA Photo-aligned Multi-domain VA LCDs have been demonstrated by Rolic already in 1999 [20]. Commercial penetration of the technology have been achieved few years ago thanks to the enormous development progress done at Rolic last years together with an efficient collaboration with panel manufacturer [8,9]. Beside processing speed, optical and electrical performances, the main problem that was hindering commercial exploitation of photoaligned films is their limited alignment stability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rolic® LCMO Photo Alignment Technology: Mechanism and Application to Large LCD Panels

Ibn‐Elhaj

Chappellet

Lincker

2011

SSP

View full text Add to dashboard Cite

Abstract. Rolic® Light Controlled Molecular Orientation (LCMO) technology is the basis for todays advanced mass production technologies for large LCD-TV panel, high-resolution 3D patterned-retarders and high-resolution optical security devices. This fundamental technology allows an easy achievement of high resolution azimuthal LC-director patterns with defined bias angles, from homogeneous planar to homeotropic orientation, depending on the target application [1][2][3][4][5][6][7]. In addition to the control of bias angles, LCD panel manufacturers require alignment layers with a wide range of optimized properties. Thin alignment films must be easily coatable and should have high photosensitivity in order to achieve fast processing. The photoalignment film should also have high stability and good electrical properties such as Voltage Holding Ratio (VHR), Residual DC (RDC) and image sticking.Because of in-situ photo crosslinking during processing [1, 2], our proprietary LCMO photoalignment technology is shown to be thermally and optically stable. Last years, enormous progress has been made in the development of advanced materials that meet all requirements for mass production of large-area flat panel displays. LCMO-VA technology, for vertical alignment LCDs, is the basis for the state of the art UV 2 A production technology recently used in the manufacturing of advanced new generation LCD-TV panel displays with reduced production costs and low energy consumption [8,9]. LCMO-VA mechanism and performances of state of the art materials will be discussed.

show abstract

Section: Alignment Mechanism and Performances Of Lcmo-va Technologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rolic® LCMO Photo Alignment Technology: Mechanism and Application to Large LCD Panels

Ibn‐Elhaj

Chappellet

Lincker

2011

SSP

View full text Add to dashboard Cite

show abstract

“…The surface photoalignment of nematic LCs on polymer films has recently been adopted in processes for LC display panel production. 69 Non-contact and high-resolution photoalignment processes have considerable advantages when compared with the conventional rubbing processes. 4,6 Furthermore, many prototypes of photonic LC elements and devices have been fabricated.…”

Section: Introductionmentioning

confidence: 99%

New strategies and implications for the photoalignment of liquid crystalline polymers

Seki

2014

Polym J

134

118

View full text Add to dashboard Cite

The photoalignment of liquid crystalline materials has been studied extensively over the past two and a half decades and has recently become of technological importance in the liquid crystal display panel industry. This review introduces recent attempts at the photoalignment of liquid crystalline polymers and focuses on two aspects. First, strategies to ensure effective in-plane alignment of photoresponsive mesogens are highlighted. Despite the numerous investigations reported to date, film systems have not been well optimized in terms of realizing efficient photoreactions that consider the mesogen orientations. Second, new photoalignable systems composed of block copolymers with surface-grafted polymers and block copolymer films are introduced. The photoalignment processes in these mesoscopic systems involve strong cooperative motion of the different hierarchical size features. In the course of these approaches, a new strategic platform, photoalignment of liquid crystalline polymers via commanding from the free surface, is proposed. These approaches are expected to offer new concepts and possibilities for smart light-responsive materials and systems. Polymer Journal (2014) 46, 751-768; doi:10.1038/pj.2014.68; published online 13 August 2014 INTRODUCTIONPhotoreactions in ordered media have been the subject of numerous studies. In liquid crystal (LC) systems, molecules are packed with substantial motional freedom, and photoreactions trigger changes in the packing state or the collective molecular orientation. The effects can be amplified to the mesoscopic, microscopic and even macroscopic levels due to strong motional cooperativity. Photochromic reactions have frequently been incorporated in LC media because of their repeatability for controlling material properties. This approach has provided various types of smart, light-responsive materials 1 exhibiting surface-mediated photoalignment of LC materials, 2-6 photoinduced phase transitions, 7-12 photoorientation/addressing of polymer thin films, 13-18 photoinduced mass migrations, [19][20][21][22][23][24][25][26][27][28] phototactic sliding motions, 29-31 photo-driven motions and morphology of monolayers, 32-35 and macroscopic photomechanical deformations. [36][37][38][39][40][41][42][43][44][45][46] Photoalignment research and technology started in 1988 with the discovery of the reversible alignment control of nematic LCs by the photoisomerization of azobenzene on a substrate surface (Figure 1) by Ichimura et al. 47 It was demonstrated that the E/Z (trans/cis) photoisomerization of an azobenzene monolayer on a substrate can switch the alignment of nematic LC molecules between the homeotropic and planar modes. This active functional surface was dubbed a 'command surface' or 'command layer.' Shortly after this finding, Gibbons et al., 48 Dyadyusha et al. 49 and Schadt et al. 50 showed that angular selective excitation of an azo dye-doped polyimide or a photocrosslinkable polymer film with linearly

show abstract

“…Meanwhile, several LCD modes have also been highly developed for commercialization and they can be distinguished by a ground state of LC and an electrode structure, such as twisted nematic (TN) [1], vertical alignment (VA) [2][3][4][5][6][7][8][9], in-plane switching (IPS) [10,11] and fringe field switching (FFS) modes [12][13][14][15]. Among them, advantages of the VA mode are rubbing-free, an excellent dark state at normal view, and wide viewing angle.…”

Section: Introductionmentioning

confidence: 99%

“…Herein, due to the wide viewing, the LC reorientation needs to be in multi-directions. The conventional multi-domain VA (MVA) [2][3][4][5][6] and patterned VA (PVA) [7][8][9] have shortcomings, such as low transmittance and slow rise response time. In order to overcome the slow rise response time of such VA modes, the polymer-stabilized VA (PS-VA) mode [16][17][18][19][20] has recently been proposed, but the low-transmittance issue still persists and furthermore gives rise to a power consumption issue when employed in high resolution LCDs such as ultra-high-definition (UHD) LCDs.…”

Section: Introductionmentioning

confidence: 99%

Transmittance Improvement with Reversed Fishbone-Shape Electrode in Vertical Alignment Liquid Crystal Display

Lim¹,

Kim²,

Kim³

et al. 2016

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

A polymer-stabilized vertical alignment (PS-VA) mode with fishbone-shaped pixel electrode structure is mainly used in large-sized liquid crystal displays (LCDs) owing to its advantages such as wide viewing angle, good transmittance and fast response time. One drawback of this mode is a main bone electrode, which crosses in the center of a pixel. It causes the transmittance to decrease badly because LCs cannot be reoriented in this region, and thus, it is particularly unfavorable in an ultra-high-definition LCD. Here, we propose an innovative structure with the main bone electrode relocated to the edge area in a pixel, and investigate how this reverse directed fishbone-shaped pixel electrode structure affects electro-optic characteristics. The proposed structure shows enhanced electro-optic performance, such as the higher transmittance and the faster response time than the conventional VA mode with fishbone-shaped pixel electrode structure.

show abstract

41.1: Distinguished Paper: The World's First Photo Alignment LCD Technology Applied to Generation Ten Factory

Cited by 98 publications

References 7 publications

Rolic<sup>®</sup> LCMO Photo Alignment Technology: Mechanism and Application to Large LCD Panels

Rolic<sup>®</sup> LCMO Photo Alignment Technology: Mechanism and Application to Large LCD Panels

New strategies and implications for the photoalignment of liquid crystalline polymers

Transmittance Improvement with Reversed Fishbone-Shape Electrode in Vertical Alignment Liquid Crystal Display

Contact Info

Product

Resources

About