The present invention provides a liquid crystal alignment method and a liquid crystal display panel. The method comprises the steps of: coating a first alignment material layer on a TFT substrate, the first alignment material layer having a plurality of first regions; coating a second alignment material layer on a CF substrate, the second alignment material layer having a plurality of second regions; and utilizing the length of each first region along the row direction as an exposing width and performing an exposing alignment procedure with the exposing width to each first region to form a first alignment layer at the side of the TFT substrate.

Disclosed therein are a photoalignment polyimide copolymer making it easier to form a liquid crystal alignment layer with excellences in alignment properties, thermal and structural stabilities, and adhesiveness to a substrate, and a liquid crystal alignment layer using the same. The photoalignment polyimide copolymer includes all the three types of repeating units each having a defined structure.

An LCD device according to a group of embodiments comprises array and counter substrates, a liquid-crystal layer and a liquid-crystal alignment layer, where the array substrate or the counter substrate further comprises: a pattern of color filter layer, formed of a plurality of color regions; a pattern of light-shielding film, comprising band-shaped portions that run along boundaries of the color regions; and protrusions formed by the color filter layer and run along boundaries of the color regions; and boundaries between the color regions being respectively deviated from centerlines of the band-shaped portions by 1 μm or more.

A liquid crystal composition, comprising, at least one compound represented by Formula 1-A:

##STR00001##

wherein, in the Formula 1-A, R—*, R.sup.1—*, Q—*, *—Z1-*, *—Z2-*,

##STR00002##

n1, n2, n3, n4, L1-*, L2-*, L3-*, L4-*, L5-*, L6-*, L7-*, and L8-* are the same as defined in the specification, and * is defined as a bonding site to a neighboring atom.

A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.

A roll-to-roll method for manufacturing 2D/3D grating switch membrane is performed in such a way that: Step 1 and Step 2 are simultaneously performed, then Step 3 is performed, and finally Step 4 is performed: Step 1, subjecting a concave grating facing down to rubbing and liquid crystal dropping; Step 2, uniformly coating a PI liquid onto a surface layer of a mirror-face metal roller, and performing self-hating and rubbing; Step 3, making the concave grating rubbed and dropped with liquid crystals in Step 1 and PI layer coated and directionally-rubbed on the mirror-face metal roller in Step 2 attached to each other, forming a grating membrane, and rotating and pre-baking the grating membrane with the mirror-face metal roller; Step 4, curing the attached and baked grating membrane by the UV curing means and after stripping, collecting and winding through the 2D/3D grating switch membrane collecting roller.

An alignment coating structure for a substrate includes at least one substrate, and each of the substrates has a blind via; an alignment plate has at least one opening; the alignment plate covers on the substrate; the opening corresponds to the blind via; and a printing mechanism for transferring polyimide liquid on the alignment plate to a region out of the blind via on the substrate according to a preset printing direction. An alignment coating method for a substrate, including disposing an opening on an alignment plate makes the opening face a blind via in alignment coating. This makes the location where the blind via will not be printed by polyimide liquid, thereby increasing the liquid crystal arrangement randomness of the location where the blind via is, making the optical path be scattered to a certain extent, thereby prevent from occurrence of a Newton's ring or a rainbow pattern.

An alignment film composition includes a copolymer of a dianhydride-based compound and a diamine-based compound, and a cross-linker. The copolymer has a structure represented by Chemical Formula Ia or Chemical Formula Ib, and the cross-linker is represented by Chemical Formula IIa or Chemical Formula IIb:

##STR00001##

A display panel and a method for fabricating the same are provided. The display panel includes a first substrate, a first protrusion, a first liquid crystal layer, a third liquid crystal layer, a second liquid crystal layer, a second protrusion, and a second substrate in order from top to bottom. The first liquid crystal layer, the second liquid crystal layer, and the third liquid crystal layer include negative type liquid crystal molecules. An absolute value of a dielectric anisotropy parameter of the liquid crystal molecules in the first liquid crystal layer and an absolute value of a dielectric anisotropy parameter of the liquid crystal molecules in the second liquid crystal layer are both greater than an absolute value of a dielectric anisotropy parameter of the liquid crystal molecules in the third liquid crystal layer.

To provide a liquid crystal display device having excellent liquid crystal vertical alignment properties, good transparency when a voltage is applied and good scattering properties when no voltage is applied, and good adhesion with the liquid crystal layer. The liquid crystal display device has a liquid crystal layer formed by irradiating and curing with ultraviolet rays a liquid crystal composition containing a liquid crystal and a polymerizable compound disposed between a pair of substrates provided with electrodes, and at least one of the substrates is provided with a liquid crystal alignment film to vertically align a liquid crystal. The liquid crystal composition contains a compound represented by the formula [1], and the liquid crystal alignment film is obtained from a liquid crystal alignment treating agent containing a polymer having a side chain structure represented by the following formula [2-1] or formula [2-2], and a side chain structure represented by the following formula [3]:

X.sup.1—X.sup.2—X.sup.3—X.sup.4—X.sup.5—X.sup.6x.sup.7.sub.pX.sup.8   [1]

(X.sup.1: the formula [1-a] to formula [1-g], etc., X.sup.2, X.sup.3, X.sup.4 and X.sup.6: a single bond, etc., X.sup.5 and X.sup.7: a benzene ring, etc., X.sup.8: a C.sub.1-18 alkyl group, etc.),

##STR00001##

(X.sup.A: H, etc., X.sup.B: a benzene ring, etc., X.sup.C: a C.sub.1-18 alkyl group, etc.),

—Y.sup.1—Y.sup.2—Y.sup.3—Y.sup.4Y.sup.5.sub.nY.sup.t   [2-1]

(Y.sup.1, Y.sup.2 and Y.sup.3: a single bond, etc., Y.sup.4 and Y.sup.5: a benzene ring, etc., Y.sup.6: a C.sub.1-18 alkyl group, etc.,

—Y.sup.7—Y.sup.8   [2-2]

(Y.sup.7: a single bond, Y.sup.8: a C.sub.8-22 alkyl group, etc.).