Provided are a polarizing plate and an optical display device including same, the polarizing plate comprising a polarizing film and a contrast ratio enhancement layer formed on a light-emitting surface of the polarizing film, wherein the contrast ratio enhancement layer comprises: a first resin layer including a pattern unit having one or more engraved patterns and a flat portion formed between the engraved patterns; and a second resin layer directly formed on the pattern unit, wherein the engraved patterns have a base angle of approximately 75° to approximately 90°, the pattern unit satisfies formula 1, the first resin layer has a refractive index larger than that of the second resin layer, and the first resin layer includes a dye of which the maximum absorption wavelength is approximately 550 nm to approximately 620 nm.

A polarizing plate and an optical display including the same are provided. A polarizing plate includes: a polarizing film; a first base layer; and a pattern layer, the first base layer and the pattern layer being sequentially arranged on a light exit surface of the polarizing film, and the pattern layer includes a first layer and a second layer sequentially arranged on the first base layer, the first layer having a higher index of refraction than the second layer, and the first layer includes a patterned portion at at least a portion thereof facing the second layer, the patterned portion including at least two optical patterns and a flat section between optical patterns of the at least two optical patterns that are adjacent to each other.

An optical film includes: a protective layer; and a contrast ratio improvement layer including a first resin layer and a second resin layer facing the first resin layer, the second resin layer and the first resin layer being sequentially stacked from a lower surface of the protective layer, wherein the second resin layer has a refractive index greater than that of the first resin layer. The first resin layer has a patterned portion with at least two embossed optical patterns and flat sections immediately adjacent to and between the embossed optical patterns. The patterned section is in at least a portion thereof facing the second resin layer. A polarizing plate including the optical film and a liquid crystal display apparatus including the polarizing plate are also provided.

A polarizing plate and an optical display comprising the same are disclosed. The polarizing plate includes: a polarizer and a first protective layer stacked on one surface of the polarizer via a bonding layer, wherein the bonding layer is formed of a bonding layer composition including an epoxy compound and a photocationic initiator, and the polarizing plate has a chrominance variation ΔE of 5.2 or less, as calculated by Equation 1.

Provided are a polarizing plate including a polarizing layer containing a lyotropic liquid crystal compound and capable of achieving uniform polarization properties over a large area, and a display device equipped with the polarizing plate. The polarizing plate includes: an alignment film; and a polarizing layer on the alignment film. The alignment film contains an alignment film polymer, has a static contact angle with water of 60° or smaller, and has a slow axis. The polarizing layer contains a lyotropic liquid crystal compound and has an absorption axis parallel to the above slow axis. The lyotropic liquid crystal compound is preferably dichroic.

An object of the present invention is to provide a laminate in which the coloring of reflected light is reduced. The laminate includes an optical film having a light absorption anisotropic film formed using a composition including a dichroic substance and having a transmittance of more than 50%, a λ/4 plate, and a metal electrode in this order, in which in a case where a degree (%) of polarization at a wavelength of λ of the optical film is defined as P(λ) and a reflectance (%) at the wavelength of λ of the metal electrode is defined as R(λ), a ratio of a minimum value of R/P to a maximum value of R/P at wavelengths of 450 nm, 550 nm, and 650 nm is more than 85%.

A polarizing plate and an optical display including the same are provided. A polarizing plate includes: a polarizing film; a first base layer; and a pattern layer, the first base layer and the pattern layer being sequentially arranged on a light exit surface of the polarizing film, and the pattern layer includes a first layer and a second layer sequentially arranged on the first base layer, the first layer having a higher index of refraction than the second layer, and the first layer includes a patterned portion at at least a portion thereof facing the second layer, the patterned portion including at least two optical patterns and a flat section between optical patterns of the at least two optical patterns that are adjacent to each other.

An object of the present invention is to provide an optical laminate in which an optically anisotropic layer provided as an upper layer has good liquid crystal alignment properties, and a polarizing plate and an image display device using the optical laminate. An optical laminate of the present invention is an optical laminate including: a first optically anisotropic layer; and a second optically anisotropic layer, in which the first and second optically anisotropic layers are directly laminated, each of the first and second optically anisotropic layers consists of a liquid crystal layer, and a photo-alignment polymer having a photo-alignment group and at least one type of polar group selected from the group consisting of a hydroxyl group and a ketone group is present in a surface of the second optically anisotropic layer on a side in contact with the first optically anisotropic layer.

A polymerizable liquid crystal composition having excellent solubility, used for formation of an optically anisotropic film having excellent durability. The polymerizable liquid crystal composition contains a polymerizable liquid crystal compound P1 represented by Formula (1): A-Ar-A, a polymerizable liquid crystal compound P2 represented by Formula (2): A-Ar-B, and a polymerizable liquid crystal compound P3 represented by Formula (3): B-Ar-B. In Formulae (1) and (2), A's represent predetermined side chains, all of which exhibit the same C log P value, and in Formulae (2) and (3), B's represent predetermined side chains, all of which exhibit the same C log P value. It should be noted that A and B represent side chains having C log P values different from each other, in which the C log P value of A is larger than the C log P value of B and the C log P value of at least one of A or B is 3.3 or more.

Provided is a composition that is capable of forming a polarizer layer having an excellent degree of alignment and excellent adhesiveness to another layer in a case of being applied to a laminate, a polarizer layer, a laminate, and an image display device. The composition of the present invention is a composition including at least a polymer liquid crystal compound, a dichroic material, and a low-molecular-weight liquid crystal compound, in which the polymer liquid crystal compound is a copolymer having a repeating unit (1) represented by Formula (1), the low-molecular-weight liquid crystal compound is a compound represented by Formula (LC), and relationships represented by Expressions |log P(SP1)−log P(SPL1)|≤2.0 (11), |log P(MG1)−log P(SP1)|≥4.5 (12), and |log P(ML)−log P(SPL1)|≥4.0 (13) are satisfied.

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