TWI649392B - Adhesive sheet and polarizing plate assembly - Google Patents

Abstract

An adhesive sheet for an optical element includes: an adhesive layer, which is an acrylic adhesive; and an absorbing material, which is incorporated in the adhesive in a concentration range (or weight percentage) of 0.1% to 5.0%. A film is formed in the adhesive layer or a thickness ranging from 0.1um to 5um on the adhesive layer. Among them, the transmission spectrum of the absorption material between the wavelengths of 570-600nm is more than 10% lower than the transmission spectrum of the wavelengths of 450nm and more than 15% lower than the transmission spectrum of the wavelengths of 650nm.

Description

Adhesive sheet and polarizing plate assembly

The invention relates to an adhesive sheet, in particular to an adhesive sheet suitable for use in a polarizing plate.

A polarizer or polarizer is an optical element that can convert natural light that is generally not polarized into polarized light that is polarized in a specific direction, or that passes only polarized light in a specific direction. For example, parallel light that is in the same direction as the polarizer can Pass, but the vertical light orthogonal to the direction of the polarizing plate will be blocked and cannot be transmitted. In this way, the polarization of the light after passing through the polarizing plate can be controlled. Polarizers or polarizers have a wide range of applications, including camera lenses, microscopes, 3D stereo glasses, sunglasses, display panels, and so on. Depending on the purpose and efficacy desired, the composition and materials of polarizers will vary.

With the development of science and technology and people's increasing requirements for the color effect of display products, liquid crystal display panels have also developed in the direction of improving the color gamut, that is, increasing the color that can be recognized by the human eye. Wide represents the higher the color coverage that can be recognized by the human eye, so the wide color gamut has also become an indicator of the display quality of the display panel.

The method used to improve the color gamut of the panel in the conventional technology is to use a quantum dot film included in the backlight film to excite the quantum dot film with a blue LED to generate a narrow-band excitation light source to form a wide-band Optical performance of color gamut. However, since the general quantum dot film contains cadmium (Cd), It is toxic and will cause harm to the environment. Therefore, how to strike a balance between the demand for wide-gamut display technology and the world trend of non-toxic and environmental protection, or even a win-win situation, is one of the goals that the industry is still working on.

Therefore, it is sought to improve the color gamut from the display panel structure itself, which is a feasible direction for solving the problems faced by the conventional technology.

Therefore, an object of the present invention is to provide an adhesive sheet having a specific light transmission spectrum, which can be applied to a polarizing plate of an optical element to achieve a wide color gamut performance.

An aspect of the present invention provides an adhesive sheet for use on an optical element, including: an adhesive layer, which is an acrylic adhesive; and an absorbing material, which is incorporated in the adhesive layer. Among them, the weight percentage of the absorbing material relative to the adhesive layer is 0.1% to 5.0%, and the transmission spectrum at a wavelength of 570-600nm is more than 10% lower than the transmission spectrum at a wavelength of 450nm, and is more than the transmission between 650nm More than 15% lower spectrum.

Another aspect of the present invention provides an adhesive sheet for an optical element, including: an adhesive layer, which is an acrylic adhesive; and an absorbing material, which is located on the adhesive layer. Among them, the thickness of the absorbing material is in the range of 0.1-5um, the transmission spectrum between the wavelength 570-600nm is more than 10% lower than the transmission spectrum between the wavelength 450nm, and more than 15% lower than the transmission spectrum between the wavelength 650nm.

Another aspect of the present invention provides an adhesive sheet for use on an optical element, including: an adhesive layer, which is an acrylic adhesive; and an absorbing material, which is incorporated into the adhesive or forms a film on the adhesive. The layer contains a tetraazaporphyrin dye of the structural formula (I) and a pigment as follows: Among them, R ⁴¹ to R ⁴⁸ each independently represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aromatic group, a substituted or unsubstituted A substituted aryloxy group, a substituted or unsubstituted aralkoxy group, or a substituted or unsubstituted amine group, M represents 2 hydrogen atoms, 2 monovalent metal atoms, divalent metal atoms, trivalent substituted metal atoms, or Oxidizing metal atoms.

Another aspect of the present invention provides an adhesive sheet for an optical element, including: an adhesive layer, which is an acrylic adhesive; and an absorbing material, which is incorporated into the adhesive or forms a film on the adhesive. The layer contains a squarylium dye of the formula (II) shown below: Among them, R ₁ to R ₄ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a phenyl group which may have a substituent, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms; R ₅ to R ₈ each independently represent a hydrogen atom, A hydroxyl group, a mercapto group, an alkoxy group having 1 to 5 carbon atoms, or a trifluoromethyl group; R ₉ to R ₁₂ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms; and the hydrogen atom system contained in the monovalent saturated hydrocarbon group It may be substituted with a halogen atom, a cyano group, a carbamoyl group, an sulfamoyl group, a hydroxyl group, or an amine group, and an oxygen atom or a sulfur atom may be inserted between the carbon atoms constituting the saturated hydrocarbon group.

11‧‧‧LCD layer

12‧‧‧The first light modulation element

13‧‧‧Second light modulation element

14‧‧‧ backlight

30‧‧‧Polarized substrate

31‧‧‧ protective layer

32‧‧‧ protective layer

33‧‧‧Surface protection film

34‧‧‧Adhesive layer

35‧‧‧ release film

36‧‧‧ Absorbent material

FIG. 1 is a schematic sectional view of a display panel structure according to an application example of a polarizing plate assembly according to the present invention; FIG. 2 is a schematic sectional view of a polarizing plate assembly structure using an adhesive according to an embodiment of the present invention; A schematic diagram of the distribution of the absorbing material contained in the polarizer assembly in the structure of the polarizer assembly according to an embodiment of the present invention; FIG. 3B is the distribution of the absorbing material contained in the polarizer assembly according to another embodiment of the present invention in the structure of the polarizer assembly. 4A is a transmission spectrum of an example of three absorbing materials contained in an adhesive sheet according to an embodiment of the present invention; FIG. 4B is a transmission of a polarizing plate assembly using an adhesive according to an embodiment of the present invention A spectrum diagram; and FIG. 5 is a schematic diagram of a color gamut enhancement effect of a display device of the present invention.

Hereinafter, the present invention will be described in more detail by the following examples. It should be noted, however, that the following description of the preferred embodiments of the present invention is for the purpose of description and illustration only, and is not intended to limit the present invention.

Please refer to FIG. 1. The display panel structure according to the present invention includes a color filter substrate (not shown) and a thin-film transistor substrate (not shown) sandwiching a liquid crystal layer 11, and the liquid crystal layer 11 is subjected to an applied electric field. Control to change the liquid crystal configuration to control the amount of light passing through different liquid crystal regions; the first light modulation element 12 is located on one side of the liquid crystal layer 11 to adjust its optical characteristics after the light enters the liquid crystal layer; the second light modulation The element 13 is located on the other side of the liquid crystal layer 11 and is used to adjust the optical characteristics of the light before it enters the liquid crystal layer 11, for example, to convert the passing light (polarized light having any direction) into polarized light of a specific direction. And a backlight element 14 located on the opposite side of the second light modulation element 13 from the liquid crystal layer 11 to provide a backlight for display.

In order to achieve a wide color gamut without using a toxic quantum dot film, the inventor of the present invention has developed an adhesive sheet, which is used in the first light modulation element 12 and / or the second light modulation element 13 , Can make the polarizing plate therein have the effect of improving color gamut.

FIG. 2 is a schematic cross-sectional view of an embodiment of an adhesive sheet of the present invention used in a polarizing plate assembly. The polarizing plate assembly includes a polarizing substrate 30 to change light from non-polarized light to polarized light; an upper protective layer 31 and a lower protective layer 32 to support and protect the polarizing film; and a surface protective film 33 to protect the polarized light. A film; an adhesive layer 34 for attaching a polarizing film to a display panel substrate; and a release film 35 for protecting the adhesive. When the polarizing plate assembly is used, the surface protection film 33 and the release film 35 are peeled off and adhered to the display panel through the adhesive layer 34. The adhesive layer 34 according to the present invention is an adhesive layer containing an absorbing material, so as to achieve the effect of improving the color gamut, which will be described in detail later.

In the above embodiment, the material of the polarizing substrate 30 may be a polyvinyl alcohol (PVA) resin film, which may be made by saponifying a polyvinyl acetate resin. The materials of the protective layers 31 and 32 are, for example, polymethylmethacrylate (PMMA), Triacetyl Cellulose (TAC), acrylic resin film, polyaromatic hydroxy resin film, polyether resin film, and cyclic polyolefin. Resin film (such as polynorbornene resin film), polyester (Polyethylene Terephthalate, PET), A group consisting of Polypropylene (PP), Cyclo Olefin Polymer (COP), Polycarbonate (PC), and any combination thereof; the material of the surface protection film 33 is polyethylene (PE) Polyethylene terephthalate (PET); The material of the release film 35 is, for example, polyethylene (PE), polyethylene terephthalate (PET), and the like. The above examples of materials are for illustration purposes only, and those skilled in the art may make appropriate selections based on actual needs, without affecting or limiting the scope of implementation and protection of the present invention.

In one embodiment, the polarizing plate assembly may include other structural types of optical layers, such as optical gain, alignment, compensation, steering, orthogonal, diffusion, protection, anti-sticking, scratch resistance, anti-glare, and reflection suppression. Layers that are helpful such as high refractive index can be, for example, alignment liquid crystal layers with characteristics such as controlled viewing angle compensation or birefraction, easy-to-bond treatment layers, hard coatings, anti-reflection layers, anti-adhesion layers, diffusion Layer, anti-glare layer and other surface treatment layers.

The absorbent material 36 may be formed in a manner of being incorporated with the adhesive layer 34 and distributed in the adhesive layer 34, as shown in FIG. 3A, or formed on the surface of the adhesive layer 34 to become an adhesive together with the adhesive. The sheet is formed on the adhesive layer 34 by, for example, coating, spraying, or other film forming methods, as shown in FIG. 3B. When incorporated into the adhesive layer 34, its concentration range (or weight percentage) is between 0.1% and 5.0%, preferably between 0.1% and 1.0%. When the film layer is integrated on the adhesive layer 34, its thickness ranges between 0.1um ~ 5um, preferably between 0.1um ~ 1um.

The composition of the above adhesive mainly includes, but is not limited to: (A) a main agent, (B) a bridging agent, and (C) a silane coupling agent, and each composition will be described below.

(A) Main agent: The main agent contains at least one (meth) acrylate. In the following, (meth) acrylate means any one of acrylate or methacrylate, and the remaining "(meth)" The meaning can also be deduced by analogy. The (meth) acrylate may be selected from, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, or n- (meth) acrylate Linear alkyl (meth) acrylates such as octyl ester, undecyl (meth) acrylate; or, for example, select from: isobutyl (meth) acrylate, 2-ethyl (meth) acrylate Hexyl ester, isooctyl (meth) acrylate, etc. branched alkyl (meth) acrylate; or, for example, can be selected from: 2-methoxyethyl (meth) acrylate, ethyl (meth) acrylate (Meth) acrylic acid-substituted alkyl (meth) acrylates such as oxymethyl esters. In addition, the (meth) acrylate may contain an aryl group, such as benzyl (meth) acrylate, etc .; or the (meth) acrylate may contain an aryloxy group, such as 2-phenoxyethyl (meth) acrylate, 2- (2-phenoxyethoxy) ethyl (meth) acrylate, (meth) acrylate of nonylphenol modified by ethylene oxide, 2- (o-phenyl) (meth) acrylate Phenoxy) ethyl ester and the like. After curing and drying, the crosslinked (meth) acrylate is the main component and structure of the adhesive layer.

In one embodiment, the main agent may include the following formulation ratios: 40 to 90 parts by weight of butyl acrylate (BA), 10 to 40 parts by weight of methyl acrylate (MA), 1 part by weight or less of acrylic acid (AA), and acrylic acid 2- 5 parts by weight or less of hydroxyethyl ester (HEA), 5 parts by weight or less of 2-methoxyethyl acrylate (MEA), and 4-10 parts by weight of 2-phenoxyethyl acrylate (PEA). In one embodiment, the average molecular weight of the main agent is between 1.2 and 1.7 million, and Mw / Mn is between 3.5 and 5.

(B) bridging agent: the bridging agent can help the (meth) acrylate monomer in the main agent to crosslink, form a network structure, and improve the strength of the adhesive layer. The bridging agent has at least two functional groups in the molecule, which can Reacts with the polar functional group of the (meth) acrylate monomer in the main agent. Its types are epoxy-based bridging agent, isocyanate-based bridging agent, imine-based bridging agent, metal chelate-based bridging agent, and aziridine. As a bridging agent, one kind can be selected or mixed with a plurality of bridging agents. The total amount of the bridging agent is 0.05 to 20 parts by weight. If the proportion of the bridging agent is too low, although it can increase part of the adhesive force, the cohesion of the formed adhesive layer is insufficient. Foaming may occur during the process.

The epoxy bridging agent can be selected from, for example, bisphenol A epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol diglycidyl ether, glycerol triglycidyl Ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, N, N-diglycidylaniline, N, N, N ', N'-tetraglycidyl-m -Xylene diamine, 1,3-bis (N, N-diglycidylaminomethyl) cyclohexane, and the like.

Isocyanate bridging agent has at least two isocyanate groups (NCO) in the molecule, for example, can be selected from: toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylene diisocyanate, hydrogenated xylene diisocyanate Isocyanates, diphenylmethane diisocyanates, hydrogenated diphenylmethane diisocyanates, naphthalene diisocyanates, triphenylmethane triisocyanates, and the like. In addition, a bridging agent can also be used by using an adduct obtained by reacting these isocyanate compounds with a polyhydric alcohol such as glycerin or trimethylolpropane, or by forming an isocyanate compound into a dimer or trimer.

The imine bridging agent can be selected from, for example, diethylenetriamine and triethylenetetramine.

The metal chelating bridging agent can be selected from, for example, the multivalent value of ethylacetone or ethylacetate with aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, barium, chromium, zirconium, etc. Compounds formed by coordination of metals.

The aziridine bridging agent can be selected from, for example, diphenylmethane-4,4'-bis (1-aziridinecarboxamide), toluene-2,4-bis (1-aziridinecarboxamide) , Triethylene melamine, m-xylylenedi-bis-1- (2-methylaziridine), p--1-aziridinylphosphine oxide, hexamethylene-1,6-bis (1 -Aziridinecarboxamide), trimethylolpropane-tri-β-aziridinylpropionate, tetramethylolmethane-tri-β-aziridinylpropionate, and the like.

(C) Silane coupling agent: one of the following can be selected or mixed with a plurality of silane coupling agents. The total amount of the silane coupling agent is 0.01 to 10 parts by weight. Silane coupling agents can be selected from, for example, vinyltrimethoxysilane, vinyltriethoxysilane, vinyl ginseng (2-methoxyethoxy) silane, 3-methacryloxypropyltrimethoxy Silane compounds containing polymerizable unsaturated groups (such as ethylenic bonds); or, for example, selected from: 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxy ring Hexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyl Silane compounds having an epoxy group structure, such as ethoxydimethylsilane; or, for example, selected from: 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N- (2-Aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, etc. Silane compounds; or, for example, halogenated substituent-containing silane compounds such as 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, etc .; other examples: 3-methylpropene Methoxypropyltrimethoxysilane Alkanes, 3-mercaptopropyltrimethoxysilane, and the like. The composition of the adhesive can also be added with other appropriate additives according to the actual product requirements, such as including antistatic agents. For example, the antistatic agent may include various cationic antistatic agents having cationic groups such as a level 4 ammonium salt, a pyridinium salt, and a level 1 to 3 amine group; having a sulfonate group, a sulfate salt group, a phosphoric acid Anionic antistatic agents such as ester salts, phosphonates and other anionic groups; amphoteric antistatic agents such as amino acids and amino sulfates; amino alcohols, glycerols, polyethylene glycols, etc. A nonionic antistatic agent; or a polymer-type antistatic agent obtained by polymerizing the antistatic agent as described above. The antistatic agent is added in an amount of 0.1 to 1.0 parts by weight, and the measured surface impedance range is 10 ¹⁰ to 10 ¹¹ ohms.

In one embodiment, the main absorption wavelength of the absorbing material is 560-610 nm, more preferably 570-600 nm, and most preferably 580-590 nm. In addition, the absorbing material may be, for example, a dye, a pigment, or other materials capable of absorbing light bands.

In one embodiment, the absorbing material is a tetraazaporphyrin dye having the structural formula (I) shown below Among them, R ⁴¹ to R ⁴⁸ each independently represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aromatic group, a substituted or unsubstituted A substituted aryloxy group, a substituted or unsubstituted aralkoxy group, or a substituted or unsubstituted amine group, M represents 2 hydrogen atoms, 2 monovalent metal atoms, divalent metal atoms, trivalent substituted metal atoms, or Oxidizing metal atoms.

Another example of the absorbing material 36 is a squarylium dye: In Formula II, R ₁ to R ₄ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a phenyl group which may have a substituent, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms.

R ₅ to R ₈ each independently represent a hydrogen atom, a hydroxyl group, a mercapto group, an alkoxy group having 1 to 5 carbon atoms, or a trifluoromethyl group.

R ₉ to R ₁₂ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms, and the hydrogen atom contained in the monovalent saturated hydrocarbon group may be a halogen atom, a cyano group, a carbamoyl group, an amidino group, a hydroxyl group Or an amine group may be substituted, and an oxygen atom or a sulfur atom may be inserted between the carbon atoms constituting the saturated hydrocarbon group.

Examples of the halogen atom in R ₁ to R ₄ include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. Examples of the saturated hydrocarbon group in R ₁ to R ₄ and R ₉ to R ₁₂ include, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, and decyl Alkyl, dodecyl, hexadecyl, and eicosyl, etc. linear alkyl groups having 1 to 20 carbon atoms; isopropyl, isobutyl, second butyl, third butyl, isopentyl, Neopentyl and 2-ethylhexyl branched alkyl groups having 3 to 20 carbons; cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl and tricyclodecyl carbons Alicyclic saturated hydrocarbon. Examples of the substituent which the phenyl group in R ₁ to R ₄ may have include a halogen atom, a cyano group, a hydroxyl group, and an amine group.

In the formula (II), R ₁ to R ₄ are each independently and preferably a hydrogen atom.

R ₅ to R ₈ are each independently preferably a hydrogen atom, a hydroxyl group, or an alkoxy group having 1 to 5 carbon atoms, and more preferably a hydrogen atom, a hydroxyl group, a methoxy group, or an ethoxy group.

R ₉ to R ₁₂ are each independently preferably an alkyl group having 1 to 10 carbon atoms (in the alkyl group, a hydrogen atom may have a hydroxyl group, and an oxygen atom may be inserted between the carbon atoms).

The above examples of materials are for illustration purposes only, and those skilled in the art may make appropriate selections based on actual needs, without affecting or limiting the scope of implementation and protection of the present invention.

The present invention experimentally finds that the transmission spectrum of the absorbing material itself suitable for improving the color gamut in the present invention, and the transmission spectrum of the polarizing plate of the present invention after the absorbing material 36 is doped in the adhesive layer 34 are shown in FIGS. 4A and 4B. As shown, material 1, material 2 and material 3 are as follows: material 1 has the structure of formula I, Wherein: the central metal M is palladium (Pd), and the concentration is 1%; the substituents R ⁴¹ , R ⁴³ , R ⁴⁵ , and R ⁴⁷ are tert-butyl; and the substituents R ⁴² , R ⁴⁴ , R ⁴⁶ and R ⁴⁸ are 2-fluorophenyl.

Material 2 has the structure of formula I, wherein the central metal M is copper (Cu), and the concentration is 1%; the substituents R ⁴¹ , R ⁴³ , R ⁴⁵ , and R ⁴⁷ are tert-butyl. ; And the substituents R ⁴² , R ⁴⁴ , R ⁴⁶ and R ⁴⁸ are 2-fluorophenyl.

Material 3 has the structure of formula I, wherein the central metal is copper (Cu), and the concentration of 0.1% substituents R ⁴¹ , R ⁴³ , R ⁴⁵ , and R ⁴⁷ is tert-butyl; and The substituents R ⁴² , R ⁴⁴ , R ⁴⁶ and R ⁴⁸ are 2-fluorophenyl.

It can be seen from the figure that the transmission spectrum of the absorption material between the wavelengths of 570-600nm is more than 10% lower than the transmission spectrum of the wavelength of 450nm, that is, T (570nm ~ 600nm) <0.9 * T (450nm), preferably 15% lower Above, more than 20% lower. And the absorption spectrum is more than 15% lower than the transmission spectrum of the wavelength between 650nm, that is, T (570nm ~ 600nm) <0.85 * T (650nm), preferably 20% lower, more than 25% lower.

As described above, the adhesive sheet according to the present invention can be used in the first light modulation element or the second light modulation element or both of the display panel shown in FIG. 1 to make the modulation element have both polarized light and enhanced color. Domain effect. Therefore, the backlight emitted by the backlight element 14 does not need to use the blue light excited by the quantum dot film, but can use a general white light backlight. Of course, different backlight sources can also be used according to other design requirements, or combined with other technologies that help improve the color gamut. In addition, the adhesive effect of the adhesive itself is not affected by the addition of the absorbing material. As shown in Table 1 below, the physical properties of the adhesive are still similar to those of the control group (without the absorbing material added). There are improvements in these examples. The materials of the adhesive formulations 1 and 2 of the examples and comparative examples in Table 1 can be selected from the materials disclosed in the foregoing description of the invention, and the physical properties of the adhesive are confirmed after the absorption material 1 and the absorption material 2 are added.

FIG. 5 is a schematic diagram showing changes in the color gamut of the display panel of the present invention under various standards, where the x-axis is the chromaticity x and the y-axis is the chromaticity y. The display panel using the adhesive sheet developed by the present invention can effectively improve the color gamut by more than 10% without the need for a quantum dot film. For example, the NTSC color gamut can be increased by approximately 25%, the DCI-P3 color gamut can be increased by approximately 27%, and the BT2020 color gamut can be increased by approximately 19%.

Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. For example, although the application of the adhesive sheet of the present invention to a liquid crystal display panel is taken as an example in the above description, anyone familiar with this technique In addition, without departing from the spirit and scope of the present invention, the adhesive sheet of the present invention can also be used in other connection parts of display panels or different optical elements to achieve similar purposes. In addition, those skilled in the art should also make a little Changes and retouching, so the protection scope of the present invention shall be determined by the scope of the appended patent application.

Claims (10)

An adhesive sheet includes: an adhesive layer, which is an acrylic adhesive. The composition of the acrylic adhesive includes (A) a main agent, (B) a bridging agent, and (C) a silane coupling agent; and an absorbent. Material, incorporated into the adhesive layer, wherein the weight percentage of the absorbing material relative to the adhesive layer is 0.1% to 5.0%, and the penetration spectrum of the adhesive sheet between the wavelengths of 570-600nm is greater than that of the wavelength of 450nm The transmission spectrum is more than 10% lower and more than 15% lower than the transmission spectrum between 650nm wavelength. An adhesive sheet includes: an adhesive layer, which is an acrylic adhesive. The composition of the acrylic adhesive includes (A) a main agent, (B) a bridging agent, and (C) a silane coupling agent; and an absorbent. The material is formed on the adhesive layer, wherein the transmission spectrum of the adhesive sheet at a wavelength of 570-600nm is more than 10% lower than the transmission spectrum at a wavelength of 450nm and lower than the transmission spectrum at a wavelength of 650nm 15% or more. The adhesive sheet according to item 1 of the scope of the patent application, wherein the weight percentage of the absorbing material to the adhesive layer is 0.1% to 1.0%. The adhesive sheet according to item 1 or 2 of the scope of the patent application, wherein the transmission spectrum of the absorbing material between the wavelengths of 570-600 nm is lower than the transmission spectrum of the wavelengths of 450 nm by more than 15%, and the transmission spectrum of the absorption materials is 650 nm The transmission spectrum is lower than 20%. According to the adhesive sheet described in item 1 or 2 of the scope of patent application, the absorbing material is a dye, pigment, or other material capable of absorbing light band, and / or the main absorption wavelength of the absorbing material is 560 ~ 610nm. The adhesive sheet according to item 5 of the scope of patent application, wherein the absorbing material is a tetraazaporphyrin dye and a pigment including the structural formula (I) shown below: Among them, R ⁴¹ to R ⁴⁸ each independently represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aromatic group, a substituted or unsubstituted A substituted aryloxy group, a substituted or unsubstituted aralkoxy group, or a substituted or unsubstituted amine group, M represents 2 hydrogen atoms, 2 monovalent metal atoms, divalent metal atoms, trivalent substituted metal atoms, or Oxidizing metal atoms. The adhesive sheet according to item 6 of the scope of the patent application, wherein the substituents R ⁴¹ , R ⁴³ , R ⁴⁵ , and R ⁴⁷ are tert-butyl, and / or the substituents R ⁴² , R ⁴⁴ , R ⁴⁶ and R ⁴⁸ are 2-fluorophenyl, and / or the central metal M is palladium or copper. The adhesive sheet according to item 5 of the scope of patent application, wherein the absorbing material is a squarylium dye containing the structural formula (II) shown below: Among them, R ₁ to R ₄ each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a phenyl group which may have a substituent, or a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms; R ₅ to R ₈ each independently represent a hydrogen atom, Hydroxyl group, mercapto group, alkoxy group having 1 to 5 carbon atoms or trifluoromethyl group; R ₉ to R ₁₂ each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms, and the hydrogen atom system contained in the monovalent saturated hydrocarbon group It may be substituted with a halogen atom, a cyano group, a carbamoyl group, an sulfamoyl group, a hydroxyl group, or an amine group, and an oxygen atom or a sulfur atom may be inserted between the carbon atoms constituting the saturated hydrocarbon group. The adhesive sheet according to item 1 or 2 of the patent application scope, wherein the thickness of the adhesive layer is 0.1-5um. A polarizing plate assembly includes: a polarizing substrate; and an adhesive sheet as described in any one of claims 1 to 9 of the scope of patent application.