WO2021012533A1

WO2021012533A1 - Polarizer and display apparatus

Info

Publication number: WO2021012533A1
Application number: PCT/CN2019/118795
Authority: WO
Inventors: 查宝; 李吉
Original assignee: Tcl华星光电技术有限公司
Priority date: 2019-07-25
Filing date: 2019-11-15
Publication date: 2021-01-28
Also published as: CN110361806B; CN110361806A

Abstract

A polarizer (100, 210) and a display apparatus (200, 300, 400). The polarizer (100, 210) comprises a surface protective layer (170, 217), a stripping protective layer (110, 211) and an organic dye layer (130, 213), wherein the organic dye layer (130, 213) is configured with an organic dye for absorbing light with a wavelength of less than 430 nm. The polarizer can solve the problem that a dark state color point tends to be blue due to the excessive leakage of blue light where the existing display apparatus is in a dark state, can enhance the color performance capability of the display apparatus (200, 300, 400), and can also reduce the damage to human eyes caused by deep blue light.

Description

Polarizer and display device

Technical field

The present invention relates to the field of display technology, in particular to a polarizer and a display device.

Background technique

Currently, polarizers in liquid crystal display devices generally use iodine-based polarizers, and iodine-based polarizers are composed of polyvinyl alcohol (PVA) and iodine molecules. Since iodine-based polarizers are easy to obtain polarization characteristics with high polarization and high transmittance, iodine-based polarizers are currently mainly used in liquid crystal displays.

technical problem

The composition and content of iodine molecules in the polarizer will affect its optical properties. Among them, I5- in the iodine molecule has a high absorption efficiency for red light, while I5- has a large molecular weight and is easy to decompose or volatilize and can be decomposed into I3-. In order to prevent the "red change" of the polarizer, it is necessary to increase the content of I5-in the polarizer. Therefore, it is easy to cause excessive blue light leakage when the current liquid crystal display is in the dark state, causing the dark state color point to become blue Case.

In summary, when the existing liquid crystal display device has a dark state, there is a problem that excessive blue light leakage causes the color point of the dark state to become blue. Therefore, it is necessary to provide a polarizer and a display device to improve this defect.

Technical solutions

The embodiments of the present disclosure provide a polarizer and a display device, which are used to solve the problem of excessive blue light leakage in the existing liquid crystal display device in the dark state, which causes the color point of the dark state to become blue.

The embodiments of the present disclosure provide a polarizer, including a surface protective layer, a peeling protective layer, and an organic dye layer, and the organic dye layer is configured with organic dyes for absorbing light with a wavelength below 430 nm;

Wherein, the structure of the organic dye is a benzophenone derivative of formula (1) or the structure of the organic dye is a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative of formula (2) Things:

According to an embodiment of the present disclosure, both the benzophenone derivative and the methylene bis-benzotriazolyl tetramethyl butyl phenol derivative contain R1, and R1 includes alkoxy, ester, and non-conjugated groups. Structural straight-chain alkanes, branch-containing alkanes, F-substituted alkane derivatives, conjugated structures connected by alkoxy groups and ester groups, or heterocyclic-containing compounds.

An embodiment of the present disclosure provides a display device, including: a first substrate on which a first film layer is provided, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer;

According to an embodiment of the present disclosure, R1 includes an alkoxy group, an ester group, a straight-chain alkane with a non-conjugated structure, a branched alkane, an F-substituted alkane derivative, a conjugated structure connected by an alkoxy group and an ester group Or compounds containing heterocyclic rings.

According to an embodiment of the present disclosure, the first substrate is a polarizer, the first film layer is an organic dye layer, the polarizer further includes a surface protection layer and a peeling protection layer, and the organic dye layer is disposed on the Between the surface protective layer and the peeling protective layer.

According to an embodiment of the present disclosure, the material of the organic dye layer is one of polystyrene, bisphenol A polycarbonate, polycarbonate, polymethylmethacrylate, polyamide-6, polyurethane, and polyimide. Species, or blocks formed by the polymerization of two or more of the above materials.

According to an embodiment of the present disclosure, the display device is a liquid crystal display device, the first substrate is a backlight substrate for providing a light source, and the first film layer is a diffusion sheet.

According to an embodiment of the present disclosure, the display device further includes a display panel, the backlight substrate further includes a diffuser and a light source, the diffuser is disposed on the diffuser on a side close to the display panel, and the light source is disposed On the side of the diffusion plate away from the diffusion sheet.

According to an embodiment of the present disclosure, the display device is a liquid crystal display device, the first substrate is a color filter substrate, and the first film layer is a color filter layer.

According to an embodiment of the present disclosure, the color filter layer includes a blue color filter layer, a red color filter layer, and a green color filter layer, and the organic dye is disposed on the blue color filter layer Inside.

An embodiment of the present disclosure provides a display device, comprising: a first substrate on which a first film layer is provided, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer, The structure of the organic dye is a benzophenone derivative of formula (1) or the structure of the organic dye is a methylenebis-benzotriazolyl tetramethylbutylphenol derivative of formula (2);

Among them, R1 includes alkoxy groups, ester groups, straight-chain alkanes with non-conjugated structures, branched alkanes, F-substituted alkane derivatives, conjugated structures connected by alkoxy groups and ester groups, or those containing heterocycles. Compound:

Beneficial effect

The beneficial effects of the present disclosure: The embodiments of the present disclosure add benzophenone derivatives or methylene bis-benzotriazole tetramethylbutyl in the organic dye layer of the polarizer and the first film layer of the display device. Organic dyes such as phenol derivatives. The organic dyes are used to absorb light with a wavelength below 430nm. Some blue light wavelengths are within this range. This effectively solves the problem of excessive blue light leakage caused by the dark state of the existing liquid crystal display device. The problem of the bluish color point of the state can increase the color performance of the display device while reducing the damage of deep blue light to the human eye.

Description of the drawings

In order to explain the embodiments or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for disclosure For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a cross-sectional structure of a polarizer provided in Embodiment 1 of the disclosure;

2 is a schematic diagram of a cross-sectional structure of the display device provided in the second embodiment of the disclosure;

3 is a schematic diagram of a cross-sectional structure of a display device provided in a third embodiment of the disclosure;

4 is a schematic diagram of a cross-sectional structure of a display device provided in the fourth embodiment of the disclosure.

Embodiments of the invention

The description of the following embodiments refers to the attached drawings to illustrate specific embodiments that can be implemented in this application. The directional terms mentioned in this application, such as [Up], [Down], [Front], [Back], [Left], [Right], [Inner], [Outer], [Side], etc., are for reference only The direction of the additional schema. Therefore, the directional terms used are used to illustrate and understand the application, rather than to limit the application. In the figure, units with similar structures are indicated by the same reference numerals.

The disclosure will be further described below in conjunction with the drawings and specific embodiments:

Example one:

The embodiment of the present disclosure provides a polarizer, which will be described in detail below with reference to FIG. 1.

As shown in FIG. 1, FIG. 1 is a schematic cross-sectional structure diagram of a polarizer 100 provided by an embodiment of the disclosure. The polarizer 100 includes a surface protective layer 170, a peeling protective layer 110 and an organic dye layer 130.

Wherein, the organic dye layer 130 is configured with an organic dye for absorbing light with a wavelength below 430 nm.

In this embodiment, the structure of the organic dye in the organic dye layer 130 is a benzophenone derivative of formula (1):

In some embodiments, the organic dye in the organic dye layer 130 may also be a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative of structural formula (2):

Specifically, both the benzophenone derivative and the methylenebis-benzotriazolyltetramethylbutylphenol derivative contain R1, and the R1 includes an alkoxy group or an ester group, wherein the alkoxy group and The length range of the carbon chain in the ester group is 1-25.

In some embodiments, the R1 may be a linear alkane with a non-conjugated structure or a branched alkane, a linear or branched alkane of an alkoxy group, a conjugated alkane connected through an alkoxy group and an ester group. structure.

In some embodiments, the R1 may also be an F-substituted alkane derivative, and the carbon chain of the F-substituted alkane derivative ranges from 1-25.

In some embodiments, the R1 may also be a compound containing a heterocyclic ring or other groups with the same chemical properties and functions.

Specifically, the heterocyclic ring-containing compound is a five-membered heterocyclic compound, a six-membered heterocyclic compound, a benzoheterocyclic compound, and a condensed ring heterocyclic compound. Five-membered heterocyclic compounds include furan, thiophene, pyrrole, thiazole, and imidazole; six-membered heterocyclic compounds include pyridine, pyrazine, pyrimidine, and pyridazine; and fused-ring heterocyclic compounds include indole, quinoline, pteridine, and acridine.

In this embodiment, the material of the organic dye layer 130 mainly includes polystyrene, bisphenol A polycarbonate, polycarbonate, polymethylmethacrylate, polyamide-6, polyurethane, and polyimide. One, or a block formed by the polymerization of two or more of the above materials.

Specifically, the molecular weight of the block is in the range of 1,000 to 20,000.

Specifically, the thickness of the organic dye layer 130 containing the organic dye ranges from 100 nm to 3000 nm.

In this embodiment, the polarizer further includes a first protective layer 160, a polarizing sub-layer 150, a second protective layer 140, and an adhesion layer 120. Wherein, the first protective layer 160 is disposed on the side of the surface protective layer 170 close to the peeling protective layer 110, and the second protective layer 140 is disposed on the first protective layer 160 away from the surface protective layer 170 On one side, the polarizing sub-layer 150 is disposed between the first protective layer 160 and the second protective layer 140, and the adhesive layer 120 is disposed between the organic dye layer 130 and the peeling protective layer 110.

In the embodiment of the present disclosure, organic dyes such as benzophenone derivatives or methylene bis-benzotriazole tetramethyl butyl phenol derivatives are added to the organic dye layer 130 of the polarizer 100. The organic dyes are used Since it absorbs light with a wavelength below 430nm, part of the blue light wavelength is within this range, so that it can effectively absorb the blue light in the light emitted by the light source while acting as a polarizer.

Embodiment two:

The embodiment of the present disclosure also provides a display device, which will be described in detail below with reference to FIG. 2.

As shown in FIG. 2, FIG. 2 is a schematic cross-sectional structure diagram of a display device provided by an embodiment of the disclosure. The display device 200 includes a first substrate 210 on which a first film layer 213 is provided, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer 213.

In this embodiment, the display device 200 is a liquid crystal display device, the first substrate 210 is a polarizer, the first film layer 213 is an organic dye layer, and the polarizer 210 further includes a surface protection layer 217 and The protective layer 211 is peeled off, and the organic dye layer 213 is disposed between the surface protective layer 217 and the peeling protective layer 211.

In this embodiment, the organic dye in the organic dye layer 130 is a benzophenone derivative whose structure is represented by formula (1):

In some embodiments, the organic dye in the organic dye layer 213 may also be a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative represented by formula (2):

Specifically, both the benzophenone derivative and the methylene bis-benzotriazolyl tetramethyl butyl phenol derivative contain R1, and the R1 includes an alkoxy group or an ester group, wherein the alkoxy group and The length range of the carbon chain in the ester group is 1-25.

In this embodiment, the polarizer 210 further includes a first protective layer 216, a polarizing sub-layer 215, a second protective layer 214, and an adhesion layer 212. Wherein, the first protective layer 216 is disposed on the side of the surface protective layer 217 close to the peeling protective layer 211, and the second protective layer 214 is disposed on the first protective layer 216 away from the surface protective layer 217 On one side, the polarizing sub-layer 215 is disposed between the first protective layer 216 and the second protective layer 214, and the adhesive layer 212 is disposed between the organic dye layer 213 and the peeling protective layer 211.

In this embodiment, the material of the organic dye layer 213 mainly includes polystyrene, bisphenol A polycarbonate, polycarbonate, polymethylmethacrylate, polyamide-6, polyurethane, and polyimide. One, or a block formed by the polymerization of two or more of the above materials.

Specifically, the thickness of the organic dye layer 130 containing organic dye is in the range of 100 nm to 3000 nm.

Preferably, the display device 200 further includes a color filter substrate, an array substrate, and a backlight module (not shown in the figure) that are arranged oppositely, and the polarizer 210 containing organic dyes is arranged on the color filter substrate away from all The array substrate side. In some embodiments, the polarizer 210 containing organic dyes may also be disposed between the array substrate and the backlight module.

In the embodiment of the disclosure, organic dyes such as benzophenone derivatives or methylene bis-benzotriazole tetramethyl butyl phenol derivatives are added to the organic dye layer 213 of the polarizer 210. The organic dyes are used It absorbs light with a wavelength lower than 430nm, and some blue light wavelengths are within this range, so as to effectively solve the problem of excessive blue light leakage in the dark state of the existing liquid crystal display device, which helps Increasing the color performance capability of the display device can also reduce the damage of deep blue light to human eyes.

Example three:

The embodiment of the present disclosure provides a display device, which will be described in detail below with reference to FIG. 3.

As shown in FIG. 3, FIG. 3 is a schematic cross-sectional structure diagram of a display device provided by an embodiment of the disclosure. The display device 300 includes a first substrate 310 on which a first film layer 315 is provided, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer 315.

In this embodiment, the display device 300 is a liquid crystal display device, the first substrate 310 is a backlight substrate for providing a light source, and the first film layer 213 is a diffusion sheet.

Specifically, the display device 300 further includes a display panel 320, the backlight substrate 310 further includes a light source 311, a reflective plate 312, an outer frame 313, a diffusion plate 314, and an incremental film 316. The diffusion sheet 315 is disposed on the The diffusion plate 314 is close to the display panel 320 and the light source 311 is disposed on the diffusion plate 314 away from the diffusion sheet 314.

In this embodiment, the organic dye in the diffusion sheet 213 is a benzophenone derivative whose structure is represented by formula (1):

In some embodiments, the organic dye in the diffusion sheet 213 may also be a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative represented by formula (2):

In this embodiment, the diffuser plate 314 is used to support other optical films in the backlight substrate 310, and the optical film is placed to sag to affect the optical effect. The incremental film 316 re-uses the light through the reflection of light to improve the brightness of the light source as a whole, and the diffuser 315 produces diffuse reflection of light through the diffusion coating, so that the light is evenly distributed. Add organic dyes such as benzophenone derivatives or methylene bis-benzotriazole tetramethyl butyl phenol derivatives to the diffuser. The organic dyes are used to absorb light with a wavelength below 430 nm, part of the blue light The wavelength is within this range, so as to effectively solve the problem of excessive blue light leakage in the existing liquid crystal display device in the dark state, which leads to the blue color point of the dark state, which helps to increase the color performance ability of the display device and can also Reduce the damage of deep blue light to human eyes.

Embodiment four:

The present disclosure still provides a display device, which will be described in detail below in conjunction with FIG. 4.

As shown in FIG. 4, FIG. 4 is a schematic cross-sectional structure diagram of a display device 400 provided by an embodiment of the disclosure. The display device 400 includes a first substrate 410 on which a first film layer 412 is provided, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer 412.

In this embodiment, the display device 400 is a liquid crystal display device, the first substrate 410 is a color filter substrate, and the first film layer 412 is a color filter layer.

Specifically, the color filter layer 412 includes a red color filter layer 413, a blue color filter layer 414, and a green color filter layer 415, and the organic dye is disposed on the blue color filter layer Within 414.

Specifically, the organic dye in the blue color filter layer 414 is a benzophenone derivative whose structure is represented by formula (1):

In some embodiments, the organic dye in the blue color filter layer 414 may also be a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative represented by formula (2):

Specifically, when fabricating the blue color film filter layer, it is necessary to dissolve the organic dye in propylene glycol methyl ether acetate (PGMEA), and evenly disperse it in the blue color film photoresist, after coating and pre-baking , Exposure, development and baking processes can obtain a blue color filter layer that absorbs light with a wavelength of less than 430nm.

In the embodiment of the present disclosure, organic dyes such as benzophenone derivatives or methylenebis-benzotriazole tetramethylbutylphenol derivatives are added to the blue color filter layer 414 of the liquid crystal display device 400, when When the light emitted by the light source passes through the blue color filter layer 414, the light with a wavelength below 430nm can be absorbed by the organic dye, thereby effectively solving the dark state of the existing liquid crystal display device, and excessive blue light leakage causes dark state color points The bluish issue helps increase the color performance of the display device while reducing the damage to human eyes caused by deep blue light.

In summary, although the present disclosure is disclosed as above in preferred embodiments, the above preferred embodiments are not intended to limit the present disclosure. Those of ordinary skill in the art can make various modifications without departing from the spirit and scope of the present disclosure. Modifications and modifications, therefore, the protection scope of this disclosure is based on the scope defined by the claims.

Claims

A polarizer, comprising a surface protection layer, a peeling protection layer and an organic dye layer, wherein the organic dye layer is configured with an organic dye for absorbing light with a wavelength lower than 430nm;

Wherein, the structure of the organic dye is a benzophenone derivative of formula (1) or the structure of the organic dye is a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative of formula (2) Things:
The polarizer of claim 1, wherein the benzophenone derivative and the methylene bis-benzotriazolyl tetramethyl butyl phenol derivative both contain R1, and R1 includes alkoxy, ester Groups, straight-chain alkanes with non-conjugated structures, branched alkanes, F-substituted alkane derivatives, conjugated structures connected by alkoxy groups and ester groups, or heterocyclic-containing compounds.
A display device, comprising: a first substrate, on which a first film layer is arranged, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer;

Wherein, the structure of the organic dye is a benzophenone derivative of formula (1) or the structure of the organic dye is a methylene bis-benzotriazolyl tetramethyl butyl phenol derivative of formula (2) Things:
The display device according to claim 3, wherein R1 includes an alkoxy group, an ester group, a straight-chain alkane having a non-conjugated structure, a branched alkane, an F-substituted alkane derivative, and an alkoxy group and an ester group. Linked conjugated structure or compound containing heterocyclic ring.
8. The display device of claim 4, wherein the first substrate is a polarizer, the first film layer is an organic dye layer, the polarizer further comprises a surface protection layer and a peel-off protection layer, and the organic dye The layer is arranged between the surface protection layer and the peeling protection layer.
The display device according to claim 5, wherein the material of the organic dye layer is polystyrene, bisphenol A polycarbonate, polycarbonate, polymethyl methacrylate, polyamide-6, polyurethane, and polycarbonate. One kind of imide, or a block formed by polymerization of two or more materials mentioned above.
8. The display device of claim 3, wherein the display device is a liquid crystal display device, the first substrate is a backlight substrate for providing a light source, and the first film layer is a diffusion sheet.
7. The display device of claim 7, wherein the display device further comprises a display panel, the backlight substrate further comprises a diffuser and a light source, and the diffuser is arranged on the diffuser on a side close to the display panel , The light source is arranged on the side of the diffusion plate away from the diffusion sheet.
8. The display device of claim 3, wherein the display device is a liquid crystal display device, the first substrate is a color filter substrate, and the first film layer is a color filter layer.
The display device according to claim 9, wherein the color filter layer comprises a blue color filter layer, a red color filter layer, and a green color filter layer, and the organic dye is disposed on the blue color filter layer. Color film filter layer.
A display device includes: a first substrate, on which a first film layer is provided, and an organic dye for absorbing light with a wavelength of less than 430 nm is configured in the first film layer. The structure is the benzophenone derivative of formula (1) or the structure of the organic dye is the methylenebis-benzotriazolyl tetramethylbutylphenol derivative of formula (2);

Among them, R1 includes alkoxy groups, ester groups, straight-chain alkanes with non-conjugated structures, branched alkanes, F-substituted alkane derivatives, conjugated structures connected by alkoxy groups and ester groups, or those containing heterocycles. Compound:
11. The display device of claim 11, wherein the first substrate is a polarizer, the first film layer is an organic dye layer, the polarizer further comprises a surface protection layer and a peel-off protection layer, and the organic dye The layer is arranged between the surface protection layer and the peeling protection layer.
The display device according to claim 12, wherein the material of the organic dye layer is polystyrene, bisphenol A polycarbonate, polycarbonate, polymethyl methacrylate, polyamide-6, polyurethane, and polycarbonate. One kind of imide, or a block formed by polymerization of two or more materials mentioned above.
11. The display device of claim 11, wherein the display device is a liquid crystal display device, the first substrate is a backlight substrate for providing a light source, and the first film layer is a diffusion sheet.
The display device of claim 14, wherein the display device further comprises a display panel, the backlight substrate further comprises a diffuser plate and a light source, and the diffuser sheet is arranged on the diffuser plate on a side close to the display panel , The light source is arranged on the side of the diffusion plate away from the diffusion sheet.
11. The display device of claim 11, wherein the display device is a liquid crystal display device, the first substrate is a color filter substrate, and the first film layer is a color filter layer.
The display device of claim 16, wherein the color filter layer comprises a blue color filter layer, a red color filter layer and a green color filter layer, and the organic dye is disposed on the blue color filter layer. Color film filter layer.