WO2020087775A1 - 一种偏光板及液晶显示装置 - Google Patents

一种偏光板及液晶显示装置 Download PDF

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Publication number
WO2020087775A1
WO2020087775A1 PCT/CN2019/070312 CN2019070312W WO2020087775A1 WO 2020087775 A1 WO2020087775 A1 WO 2020087775A1 CN 2019070312 W CN2019070312 W CN 2019070312W WO 2020087775 A1 WO2020087775 A1 WO 2020087775A1
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WO
WIPO (PCT)
Prior art keywords
layer
film
polarizing
low
polarizing plate
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Application number
PCT/CN2019/070312
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English (en)
French (fr)
Inventor
马贵智
李永凯
Original Assignee
武汉华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/464,693 priority Critical patent/US11022838B2/en
Publication of WO2020087775A1 publication Critical patent/WO2020087775A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the invention relates to the technical field of liquid crystal display, in particular to a polarizing plate and a liquid crystal display device.
  • LCD Liquid Crystal Display
  • BLU Back Light Unit
  • a liquid crystal display panel is usually composed of a color filter (CF) substrate, a thin film transistor (TFT) array substrate, and a liquid crystal layer (LCL) disposed between the two substrates Pose.
  • a polarizing plate is attached to the side of the CF substrate away from the liquid crystal layer, and a polarizing plate is also attached to the side of the TFT array substrate away from the liquid crystal layer.
  • the liquid crystal display panel controls the orientation of the liquid crystal molecules by the electric field, changes the polarization state of the light, and realizes the penetration and blocking of the optical path by the polarizer to achieve the purpose of display.
  • Backlight modules usually use light-emitting diodes (Light Emitting Diode (LED) is used as the backlight.
  • LED Light Emitting Diode
  • Blue light is abundant in computer screens, fluorescent lights, smart phone screens, digital product displays, LED lights, etc.
  • Blue light refers to high-energy light with a wavelength of 380-480nm, which has a short wavelength and high energy.
  • low-band blue light with a wavelength less than 455nm will increase the amount of toxins in the macular area of the eye, seriously threatening people's eye health. Blue light can be seen everywhere in daily life, but the main source of harmful blue light that people are exposed to is the LED liquid crystal display device.
  • the existing liquid crystal display devices on the market generally use LEDs as backlight sources. Since the backlight requires the effect of white light, the industry uses blue LEDs mixed with yellow phosphors to form white light. Since the blue LED is the main hardware, the blue spectrum in this white light has a peak, which causes what we call the harmful blue light to hurt the eyes.
  • LED LCD TVs As the main carrier of entertainment in the living room, LED LCD TVs, most families choose to watch TV before going to bed at night, and even many people will turn off the lights while watching TV, plus factors such as flashing screens, causing harmful blue light to cause damage to the eyes. Long-term accumulation causes eye fatigue, dryness, and decreased vision. It also easily stimulates brown pigments and makes the skin develop macular and freckles. Since the damage of harmful blue light to the eyes is cumulative, the damage of the TV blue light to the eyes should be paid enough attention, especially for young children.
  • the commonly used low-band blue eye protection methods are generally divided into the following categories:
  • the first method is to reduce the transmission of blue light by adding a film material on the surface of the display device, that is, the commonly used anti-blue eye protection film on the market, which acts as a blue light blocking effect by being stuck outside the display device.
  • this method has a high cost and needs to be purchased by consumers; at the same time, this method will make the picture taste worse, that is, the picture will be yellow; in addition, this method will reduce the display brightness.
  • the second way is to adjust through the mobile phone software, that is, by adjusting the luminous efficiency of the backlight LED, the overall brightness of blue light is reduced, and then the low-band blue light brightness with a wavelength of less than 455nm is reduced.
  • This is also the anti-blue light eye protection mode currently used on mobile phones.
  • this method does not require additional cost; however, the removal effect of low-band blue light with a wavelength of less than 455nm is not obvious; at the same time, there is still a problem of yellow taste in the picture.
  • low-band blue light with a wavelength of less than 455nm generally exists, which can cause irreversible damage to the user's eyes, especially the eye damage of young children.
  • the low-band blue light protection currently used mainly The eye method generally has the problem of distorted picture taste. How to reduce harmful blue light without affecting display taste is an urgent problem to be solved in the development process of liquid crystal display technology.
  • the purpose of the present invention is to provide a polarizing plate and a liquid crystal display device.
  • low-band blue light with a wavelength of less than 455nm generally exists, which can cause irreversible damage to the eyes of users, especially to young children. Eye damage is particularly serious, and the currently used low-band blue eye protection methods generally have the problem of distortion of picture taste, which can effectively reduce harmful blue light while ensuring display taste and avoiding display distortion.
  • the present invention provides a polarizing plate, the polarizing plate includes: a polarizing layer, the polarizing layer material is polyvinyl alcohol or cross-linked polyvinyl alcohol embolization microspheres; low-band blue light film, set in The upper side or the lower side of the polarizing layer, wherein blue light with a wavelength less than 455nm is defined as low-band blue light; the supporting layer is provided on the side of the polarizing layer away from the low-band blue film, the The material is cellulose triacetate or cyclic olefin copolymer; a release film is provided on the lower side of the polarizing layer, and the release film is connected to the polarizing layer or the low-wavelength blue film through an adhesive layer.
  • the material of the adhesive layer is pressure-sensitive adhesive; and a protective film is provided on the upper side of the polarizing layer.
  • the present invention also provides a polarizing plate
  • the polarizing plate includes: a polarizing layer; a low-band blue film, which is provided on the upper or lower side of the polarizing layer, wherein blue light with a wavelength of less than 455 nm is defined It is a low-band blue light; a release film is provided on the lower side of the polarizing layer, the release film is connected to the polarizing layer or the low-band blue light film through an adhesive layer; and a protective film is provided on the polarizing light The upper side of the layer.
  • the present invention also provides a liquid crystal display device, the liquid crystal display device includes a liquid crystal display panel and a backlight module, the liquid crystal display panel includes an array substrate, a color film substrate and provided on the array substrate and The liquid crystal layer between the color filter substrates, the backlight module is disposed on a side of the array substrate away from the liquid crystal layer; the liquid crystal display device further includes: a first polarizing plate, which is disposed on the color A side of the film substrate far away from the liquid crystal layer; and a second polarizing plate disposed between the array substrate and the backlight module; wherein, at least at least one of the first polarizing plate and the second polarizing plate One of them includes: a polarizing layer; a low-band blue film, which is provided on the upper or lower side of the polarizing layer, wherein blue light with a wavelength of less than 455 nm is defined as low-band blue light; and a release film, which is provided on the polarizing layer On the lower side, the release film
  • the invention adjusts the structure of the polarizing plate and uses a low-band blue light film instead of the support layer to play a role in filtering harmful wavelength blue light to reduce blue light damage, which can reduce harmful blue light by about 50% , To achieve anti-blue band eye protection effect.
  • the polarizing plate of the present invention can effectively reduce the proportion of blue light in the low and middle bands of blue light, and can effectively reduce the influence on the overall thickness of the polarizing plate, and has no obvious effect on the transmission of light in other bands to avoid the transmittance The reduction can largely guarantee the display taste and avoid the problem of display distortion.
  • the polarizing plate of the present invention can effectively control costs, has strong usability, and is beneficial to promotion.
  • Figure 1 a schematic diagram of the layered structure of the first embodiment of the polarizing plate of the present invention
  • FIG. 2 is a schematic diagram of the layered structure of the second embodiment of the polarizing plate of the present invention.
  • Figure 3 is a schematic diagram of the layered structure of the third embodiment of the polarizing plate of the present invention.
  • FIG. 4 is a schematic diagram of the layered structure of the fourth embodiment of the polarizing plate of the present invention.
  • FIG. 5 is a schematic diagram of the layered structure of the fifth embodiment of the polarizing plate of the present invention.
  • FIG. 6 is a schematic view of the layered structure of the sixth embodiment of the polarizing plate of the present invention.
  • FIG. 7 is a schematic diagram of a layered structure of an embodiment of the liquid crystal display device of the present invention.
  • the first feature “above” or “below” the second feature may include the direct contact of the first and second features, or may include the first and second features Contact not directly but through another feature between them.
  • the first feature is “above”, “above” and “above” the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is less horizontal than the second feature.
  • the polarizing plate of the present invention includes: a polarizing layer; a low-band blue film, which is provided on the upper or lower side of the polarizing layer; a release film, which is provided on the lower side of the polarizing layer, and the release film passes through the adhesive layer It is connected to the polarizing layer or the low-band blue film; and a protective film is provided on the upper side of the polarizing layer.
  • blue light with a wavelength less than 455nm is defined as low-band blue light. Since the low-band blue light with a wavelength less than 455nm will increase the amount of toxins in the macular area of the eye and seriously threaten people's eye health, it is of great significance to protect this low-band blue light.
  • the polarizing plate of the present invention does not increase the film material, adjusts the structure of the polarizing plate, and uses a low-band blue light film to replace the support layer (COP / TAC / CAT, etc.), which can filter harmful blue light and reduce blue light Damage can reduce the harmful blue light by about 50%, and realize the anti-blue wave eye protection effect.
  • the polarizing plate of the present invention can effectively reduce the proportion of blue light in the low and middle bands of blue light, and can effectively reduce the influence on the overall thickness of the polarizing plate, and has no obvious effect on the transmission of light in other bands to avoid the transmittance The reduction can largely guarantee the display taste and avoid the problem of display distortion.
  • the polarizing plate of the present invention can effectively control costs, has strong usability, and is beneficial to promotion.
  • the polarizing plate includes a release film 11, a polarizing layer 12, a low-band blue light film 13, an antireflection film 14, and a protective film 15 that are sequentially stacked.
  • the release film 11 is disposed on the lower side of the polarizing layer 12, and the release film 11 is connected to the polarizing layer 12 through an adhesive layer 111 for isolating the polarizing layer 12 from the external environment. That is, when the low-band blue film 13 is provided on the upper side of the polarizing layer 12, the release film 11 is connected to the polarizing layer 12 through the adhesive layer 111.
  • Release film refers to a film that can be distinguished on the surface of the film. The release film is not sticky or slightly sticky when it comes into contact with specific materials under limited conditions.
  • the material of the adhesive layer 111 is pressure sensitive adhesives (PSA).
  • the polarizing layer 12 is used to polarize the incident light and exit, and it is preferably polyvinyl alcohol (Polyvinyl Alcohol, PVA for short) or cross-linked polyvinyl alcohol embolization microspheres (polyvinyl alcohol microspheres, PVA-Ms for short).
  • the low-band blue film 13 is disposed on the upper side of the polarizing layer 12, and is used to filter low-band blue light with a wavelength of less than 455nm, which plays a role in filtering harmful wavelength blue light, and effectively reduces the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • the low-band blue light film 13 can use the low-blue light film produced by Toray Corporation of Japan, or the low-blue light film produced by China Jinzhang Technology, which can reduce harmful blue light by 10-50%, and at the same time, it can not transmit light in other bands Obviously.
  • the anti-reflection film 14 is disposed on the lower side of the protective film 15.
  • the anti-reflection film 14 is connected to the low-band blue light film 13 through an adhesive layer 111. That is, when the low-band blue light film 13 is provided on the upper side of the polarizing layer 12, the antireflection film 14 is connected to the low-band blue light film 13 through the adhesive layer 111.
  • APF Advanced Polarizer Film, APF for short
  • APF Advanced Polarizer Film, APF for short
  • Multilayer films are usually used in the process.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the protective film 15 is provided on the upper side of the polarizing layer 12. Specifically, in this embodiment, the protective film 15 is provided on the upper side of the antireflection film 14.
  • Protective film (Protective film) has anti-wear, anti-scratch, anti-scratch, anti-reflective effect.
  • the polarizing plate in the prior art includes a release film 21, a polarizing layer 22, a first support layer 23, an antireflection film 24, and a protective film 25 stacked in this order;
  • the layer 211 is connected, and the first support layer 23 and the antireflection film 24 are connected by an adhesive layer 211. That is, the polarizing plate of this embodiment reduces the blue light damage by using the low-band blue light film 13 to replace the first support layer 23 of the polarizing plate in the prior art without increasing the film material, thereby realizing anti-low-band blue light Eye effect.
  • the polarizer of this embodiment can effectively reduce the impact on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee Display taste, avoid display distortion.
  • the polarizing plate of this embodiment can effectively control costs, has strong usability, and is beneficial to promotion.
  • FIG. 2 a schematic diagram of the layered structure of the second embodiment of the polarizing plate of the present invention.
  • the left side of FIG. 2 is a schematic view of the layered structure of the polarizing plate of the present invention. Schematic diagram for comparison.
  • the difference from the first embodiment shown in FIG. 1 is that, in this embodiment, the low-wavelength blue film 13 is provided on the lower side of the polarizing layer; that is, the polarizing plate of this embodiment includes sequentially stacked The release film 11, the low-band blue light film 13, the polarizing layer 12, the antireflection film 14, and the protective film 15.
  • the release film 11 is disposed on the lower side of the low-band blue light film 13, and the release film 11 is connected to the low-band blue light film 13 through an adhesive layer 111, and is used to connect the polarizing layer 12 with the external environment isolation. That is, when the low-band blue film 13 is disposed on the lower side of the polarizing layer 12, the release film 11 is connected to the low-band blue film 13 through the adhesive layer 111.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the low-band blue light film 13 is disposed on the lower side of the polarizing layer 12, and is used to filter low-band blue light with a wavelength of less than 455nm, which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • a wavelength of less than 455nm which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • the polarizing layer 12 is used to polarize the incident light and exit, and it is preferably polyvinyl alcohol (PVA) or cross-linked polyvinyl alcohol embolization microspheres (PVA-Ms).
  • PVA polyvinyl alcohol
  • PVA-Ms cross-linked polyvinyl alcohol embolization microspheres
  • the antireflection film 14 is provided on the lower side of the protective film 15, and the antireflection film 14 is connected to the polarizing layer 12 through an adhesive layer 111. That is, when the low-band blue film 13 is provided on the lower side of the polarizing layer 12, the antireflection film 14 is connected to the polarizing layer 12 through the adhesive layer 111.
  • Anti-reflection film (APF) process usually uses multi-layer film.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the protective film 15 is provided on the upper side of the polarizing layer 12. Specifically, in this embodiment, the protective film 15 is provided on the upper side of the antireflection film 14.
  • Protective film (Protective film) has anti-wear, anti-scratch, anti-scratch, anti-reflective effect.
  • the polarizing plate in the prior art includes a release film 21, a first support layer 23, a polarizing layer 22, an antireflection film 24, and a protective film 25 that are sequentially stacked.
  • the release film 21 and the support layer 23 are adhered by The layer 211 is connected, and the first support layer 23 and the antireflection film 24 are connected by an adhesive layer 211. That is, the polarizing plate of this embodiment reduces the blue light damage by using the low-band blue light film 13 to replace the first support layer 23 of the polarizing plate in the prior art without increasing the film material, thereby realizing the anti-low-band blue light protection Eye effect.
  • the polarizer of this embodiment can effectively reduce the impact on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee Display taste, avoid display distortion.
  • the polarizing plate of this embodiment can effectively control costs, has strong usability, and is beneficial to promotion.
  • FIG. 3 a schematic diagram of the layered structure of the third embodiment of the polarizing plate of the present invention.
  • the left side of FIG. 3 is a schematic diagram of the layered structure of the polarizing plate of the present invention. Schematic diagram for comparison.
  • the difference from the first embodiment shown in FIG. 1 is that, in this embodiment, a support layer 31 is further provided on the lower side of the polarizing layer; that is, the polarizing plate of this embodiment includes release layers that are sequentially stacked The film 11, the support layer 31, the polarizing layer 12, the low-band blue light film 13, the antireflection film 14, and the protective film 15.
  • the release film 11 is disposed on the lower side of the support layer 31.
  • the release film 11 is connected to the support layer 31 through an adhesive layer 111 to isolate the polarizing layer 12 from the external environment. That is, when the support layer 31 is provided on the lower side of the polarizing layer 12, the release film 11 is connected to the support layer 31 through the adhesive layer 111.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the supporting layer 31 is disposed on the lower side of the polarizing layer 12 and is used to isolate moisture and air and protect the polarizing layer 12.
  • the material of the supporting layer 31 is Tri Acetic Cell (TAC) or Cyclo Olefin Polymers, referred to as COP) or polymethyl methacrylate (CAT) and so on.
  • the polarizing layer 12 is used to polarize the incident light and exit, and it is preferably polyvinyl alcohol (PVA) or cross-linked polyvinyl alcohol embolization microspheres (PVA-Ms).
  • PVA polyvinyl alcohol
  • PVA-Ms cross-linked polyvinyl alcohol embolization microspheres
  • the low-band blue film 13 is disposed on the upper side of the polarizing layer 12, and is used to filter low-band blue light with a wavelength of less than 455nm, which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • a wavelength of less than 455nm which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • the anti-reflection film 14 is disposed on the lower side of the protective film 15.
  • the anti-reflection film 14 is connected to the low-band blue light film 13 through an adhesive layer 111. That is, when the low-band blue light film 13 is provided on the upper side of the polarizing layer 12, the antireflection film 14 is connected to the low-band blue light film 13 through the adhesive layer 111.
  • Anti-reflection film (APF) process usually uses multi-layer film.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the protective film 15 is provided on the upper side of the polarizing layer 12. Specifically, in this embodiment, the protective film 15 is provided on the upper side of the antireflection film 14.
  • Protective film (Protective film) has anti-wear, anti-scratch, anti-scratch, anti-reflective effect.
  • the polarizing plate in the prior art includes a release film 21, a first support layer 231, a polarizing layer 22, a second support layer 232, an antireflection film 24, and a protective film 25 that are stacked in this order; the release film 21 and the first One support layer 231 is connected by an adhesive layer 211, and the second support layer 232 and the anti-reflection film 24 are connected by an adhesive layer 211. That is, without increasing the film material, the polarizing plate of this embodiment reduces the blue light damage by using the low-band blue film 13 to replace the second support layer 232 on the upper side of the polarizing layer 22 of the polarizing plate in the prior art. Anti-blue wave eye protection effect.
  • the polarizer of this embodiment can effectively reduce the impact on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee Display taste, avoid display distortion.
  • the polarizing plate of this embodiment can effectively control costs, has strong usability, and is beneficial to promotion.
  • FIG. 4 a schematic diagram of the layered structure of the fourth embodiment of the polarizing plate of the present invention
  • the left side of FIG. 4 is a schematic diagram of the layered structure of the polarizing plate of the present invention
  • the right side of FIG. 4 is the layered structure of the prior art polarizing plate Schematic diagram for comparison.
  • the polarizing plate includes a release film 11, a low-band blue light film 13, a polarizing layer 12, a supporting layer 31, an antireflection film 14, and a protective film 15 that are sequentially stacked.
  • the release film 11 is disposed on the lower side of the low-band blue light film 13, and the release film 11 is connected to the low-band blue light film 13 through an adhesive layer 111, and is used to connect the polarizing layer 12 with the external environment isolation. That is, when the low-band blue film 13 is disposed on the lower side of the polarizing layer 12, the release film 11 is connected to the low-band blue film 13 through the adhesive layer 111.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the low-band blue light film 13 is disposed on the lower side of the polarizing layer 12, and is used to filter low-band blue light with a wavelength of less than 455nm, which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • a wavelength of less than 455nm which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • the polarizing layer 12 is used to polarize the incident light and exit, and it is preferably polyvinyl alcohol (PVA) or cross-linked polyvinyl alcohol embolization microspheres (PVA-Ms).
  • PVA polyvinyl alcohol
  • PVA-Ms cross-linked polyvinyl alcohol embolization microspheres
  • the supporting layer 31 is provided on the upper side of the polarizing layer 12 to isolate moisture and air and protect the polarizing layer 12.
  • the material of the supporting layer 31 is Tri Acetic Cell (TAC) or Cyclo Olefin Polymers, referred to as COP) or CAT.
  • the anti-reflection film 14 is provided on the lower side of the protective film 15, and the anti-reflection film 14 is connected to the support layer 31 through an adhesive layer 111. That is, when the support layer 31 is provided on the upper side of the polarizing layer 12, the antireflection film 14 is connected to the support layer 31 through the adhesive layer 111.
  • Anti-reflection film (APF) process usually uses multi-layer film.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the protective film 15 is provided on the upper side of the polarizing layer 12. Specifically, in this embodiment, the protective film 15 is provided on the upper side of the antireflection film 14.
  • Protective film (Protective film) has anti-wear, anti-scratch, anti-scratch, anti-reflective effect.
  • the polarizing plate in the prior art includes a release film 21, a first support layer 231, a polarizing layer 22, a first support layer 232, an antireflection film 24, and a protective film 25 that are stacked in this order; the release film 21 and the first One support layer 231 is connected by an adhesive layer 211, and the second support layer 232 and the anti-reflection film 24 are connected by an adhesive layer 211. That is, without increasing the film material, the polarizing plate of this embodiment replaces the first supporting layer 231 under the polarizing layer 22 of the polarizing plate in the prior art by using a low-band blue film 13 to reduce blue light damage and achieve Anti-blue wave eye protection effect.
  • the polarizer of this embodiment can effectively reduce the impact on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee Display taste, avoid display distortion.
  • the polarizing plate of this embodiment can effectively control costs, has strong usability, and is beneficial to promotion.
  • FIG. 5 a schematic diagram of the layered structure of the fifth embodiment of the polarizing plate of the present invention.
  • the left side in FIG. 5 is a schematic diagram of the layered structure of the polarizing plate of the present invention. Schematic diagram for comparison.
  • the difference from the third embodiment shown in FIG. 3 is that, in this embodiment, the polarizing plate further includes: a surface treatment layer 51 (ie, surface treatment layer 51 provided on the lower side of the protective film 15 3); that is, the polarizing plate of this embodiment includes a release film 11, a support layer 31, a polarizing layer 12, a low-band blue light film 13, a surface treatment layer 51, and a protective film 15 that are sequentially stacked .
  • a surface treatment layer 51 ie, surface treatment layer 51 provided on the lower side of the protective film 15 3
  • the polarizing plate of this embodiment includes a release film 11, a support layer 31, a polarizing layer 12, a low-band blue light film 13, a surface treatment layer 51, and a protective film 15 that
  • the release film 11 is disposed on the lower side of the support layer 31.
  • the release film 11 is connected to the support layer 31 through an adhesive layer 111 to isolate the polarizing layer 12 from the external environment. That is, when the support layer 31 is provided on the lower side of the polarizing layer 12, the release film 11 is connected to the support layer 31 through the adhesive layer 111.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the supporting layer 31 is disposed on the lower side of the polarizing layer 12 and is used to isolate moisture and air and protect the polarizing layer 12.
  • the material of the supporting layer 31 is Tri Acetic Cell (TAC) or Cyclo Olefin Polymers, referred to as COP) or CAT.
  • the polarizing layer 12 is used to polarize the incident light and exit, and it is preferably polyvinyl alcohol (PVA) or cross-linked polyvinyl alcohol embolization microspheres (PVA-Ms).
  • PVA polyvinyl alcohol
  • PVA-Ms cross-linked polyvinyl alcohol embolization microspheres
  • the low-band blue film 13 is disposed on the upper side of the polarizing layer 12, and is used to filter low-band blue light with a wavelength of less than 455nm, which plays a role in filtering harmful wavelength blue light, and effectively reduces the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • a wavelength of less than 455nm which plays a role in filtering harmful wavelength blue light, and effectively reduces the proportion of low-band blue light in the blue light to reduce Blu-ray damage.
  • the surface treatment layer 51 is provided on the lower side of the protective film 15, and the surface treatment layer 51 is provided on the upper side of the low-band blue light film 13 for performing surface treatment on the low-band blue light film 13 To improve picture clarity. That is, when the low-band blue film 13 is provided on the upper side of the polarizing layer 12, the surface treatment layer 51 is provided on the upper side of the low-band blue film 13.
  • the surface treatment layer 51 is selected from one or more of a surface anti-glare layer (AG), a surface low reflection layer / surface non-reflection layer (LR / AR), and a surface hardening layer (HC).
  • the protective film 15 is provided on the upper side of the polarizing layer 12. Specifically, in this embodiment, the protective film 15 is provided on the upper side of the surface treatment layer 51.
  • Protective film Protective film (Protective film) has anti-wear, anti-scratch, anti-scratch, anti-reflective effect.
  • the polarizing plate in the prior art includes a release film 21, a first support layer 231, a polarizing layer 22, a first support layer 232, a surface treatment layer 26, and a protective film 25 that are stacked in this order; the release film 21 and the first A supporting layer 231 is connected through an adhesive layer 211. That is, without increasing the film material, the polarizing plate of this embodiment reduces the blue light damage by using the low-band blue film 13 to replace the second support layer 232 on the upper side of the polarizing layer 22 of the polarizing plate in the prior art. Anti-blue wave eye protection effect.
  • the polarizer of this embodiment can effectively reduce the impact on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee Display taste, avoid display distortion.
  • the polarizing plate of this embodiment can effectively control costs, has strong usability, and is beneficial to promotion.
  • FIG. 6 a schematic view of the layered structure of the sixth embodiment of the polarizing plate of the present invention
  • the left side of FIG. 6 is a schematic view of the layered structure of the polarizing plate of the present invention
  • the right side of FIG. 6 is the layered structure of the prior art polarizing plate Schematic diagram for comparison.
  • the polarizing plate includes a release film 11, a low-band blue light film 13, a polarizing layer 12, a support layer 31, a surface treatment layer 51, and a protective film 15 that are sequentially stacked.
  • the release film 11 is disposed on the lower side of the low-band blue light film 13, and the release film 11 is connected to the low-band blue light film 13 through an adhesive layer 111, and is used to connect the polarizing layer 12 with the external environment isolation. That is, when the low-band blue film 13 is disposed on the lower side of the polarizing layer 12, the release film 11 is connected to the low-band blue film 13 through the adhesive layer 111.
  • the material of the adhesive layer 111 is pressure sensitive adhesive (PSA).
  • the low-band blue light film 13 is disposed on the lower side of the polarizing layer 12, and is used to filter low-band blue light with a wavelength of less than 455nm, which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light Blu-ray damage.
  • a wavelength of less than 455nm which plays a role in filtering harmful wavelength blue light, effectively reducing the proportion of low-band blue light in the blue light Blu-ray damage.
  • the polarizing layer 12 is used to polarize the incident light and exit, and it is preferably polyvinyl alcohol (PVA) or cross-linked polyvinyl alcohol embolization microspheres (PVA-Ms).
  • PVA polyvinyl alcohol
  • PVA-Ms cross-linked polyvinyl alcohol embolization microspheres
  • the supporting layer 31 is provided on the upper side of the polarizing layer 12 to isolate moisture and air and protect the polarizing layer 12.
  • the material of the supporting layer 31 is Tri Acetic Cell (TAC) or Cyclo Olefin Polymers, referred to as COP) or CAT.
  • the surface treatment layer 51 is provided on the lower side of the protective film 15, and the surface treatment layer 51 is provided on the upper side of the support layer 31 for performing surface treatment on the support layer 31 to improve picture clarity degree. That is, when the support layer 31 is provided on the upper side of the polarizing layer 12, the surface treatment layer 51 is provided on the upper side of the support layer 31.
  • the surface treatment layer 51 is selected from one or more of a surface anti-glare layer (AG), a surface low reflection layer / surface non-reflection layer (LR / AR), and a surface hardening layer (HC).
  • the protective film 15 is provided on the upper side of the polarizing layer 12. specific,.
  • Protective film Protective film (Protective film) has anti-wear, anti-scratch, anti-scratch, anti-reflective effect.
  • the polarizing plate in the prior art includes a release film 21, a first support layer 231, a polarizing layer 22, a first support layer 232, a surface treatment layer 26, and a protective film 25 that are stacked in this order; the release film 21 and the first A supporting layer 231 is connected through an adhesive layer 211. That is, without increasing the film material, the polarizing plate of this embodiment replaces the first supporting layer 231 under the polarizing layer 22 of the polarizing plate in the prior art by using a low-band blue film 13 to reduce blue light damage and achieve Anti-blue wave eye protection effect.
  • the polarizer of this embodiment can effectively reduce the impact on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee Display taste, avoid display distortion.
  • the polarizing plate of this embodiment can effectively control costs, has strong usability, and is beneficial to promotion.
  • the liquid crystal display device includes a liquid crystal display panel 71 and a backlight module 72, and the backlight module 72 is disposed under the liquid crystal display panel 71; the liquid crystal display device further includes: A first polarizing plate 73 on the upper side of the liquid crystal display panel 71, and a second polarizing plate 74 disposed between the liquid crystal display panel 71 and the backlight module 72; wherein, the first polarizing plate 73 At least one of the second polarizing plates 74 adopts the polarizing plate according to any one of the first to sixth embodiments of the present invention.
  • the polarizing plates can reduce the blue light damage by using the low-band blue film to replace the support layer on the upper or lower side of the polarizing layer of the prior art polarizing plate, and realize the anti-low-band blue eye protection effect; phase Compared with the external anti-blue glass, the polarizer used in the present invention can effectively reduce the influence on the overall thickness of the polarizer, and has no obvious effect on the transmission of light in other wavelength bands, avoiding the decrease of the transmittance, which can largely guarantee the display Taste, to avoid the problem of display distortion; at the same time, compared with most current low-band blue light products, the polarizing plate used in the present invention can effectively control costs, has strong usability, and is conducive to promotion.
  • the liquid crystal display panel 71 is composed of a color filter (CF) substrate and a thin film transistor (Thin Film) Transistor (TFT) array substrate and a liquid crystal layer (Liquid) disposed between the two substrates Crystal Layer (abbreviated as LCL).
  • the first polarizing plate 73 is attached to the side of the CF substrate away from the liquid crystal layer
  • the second polarizing plate 74 is attached to the side of the TFT array substrate away from the liquid crystal layer.
  • the backlight module 72 is disposed on a side of the array substrate away from the liquid crystal layer; the backlight module 72 is formed by a light-emitting diode (Light Emitting Diode (LED) is used as the backlight.
  • LED Light Emitting Diode
  • the second polarizing plate 74 adopts the polarizing plate described in any one of the first to sixth embodiments of the present invention, that is, the polarizing plate with a low-band blue film provided by the present invention is used in the backlight module 72 In the lower polarizing plate between the array substrate, the reflection effect of the low-band blue film is small.
  • the second polarizing plate 74 adopts the polarizing plate according to any one of the above second, fourth, or sixth embodiments of the present invention, that is, the polarizing plate provided by the present invention with a low-wavelength blue film is used in all In the lower polarizer between the backlight module 72 and the array substrate; and in the polarizer with a low-band blue film, the low-band blue film 741 is disposed on the polarizing layer (PVA) 742 of the second polarizer 74 Underside.
  • PVA polarizing layer
  • the harmful blue light generated by the backlight LED of the backlight module is reflected by the backlight module and then passes through the polarizer
  • the harmful part of the low-band blue film is absorbed, and the subsequent light is normally displayed through the liquid crystal display panel; at the same time, due to the double-layer PVA of the upper and lower polarizers (the polarizer layer 742 of the second polarizer 74 and the polarizer layer 732 of the first polarizer 73 ),
  • the polarization effect of the low-band blue film can be further avoided, and the reflection effect of the low-band blue film can be effectively reduced.
  • FIG. 8A is the transmission spectrum of the polarizing plate of the present invention under the LED backlight
  • FIG. 8B is the transmission spectrum of the prior art polarizing plate under the LED backlight; only a part is shown in the figure
  • the type of light blue light, green light, yellow light, red light
  • the low-band blue film in the polarizing plate of the present invention uses a low-band blue film produced by China Jinzhang Technology. It can be seen from the comparison of FIGS. 8A-8B that the polarizing plate of the present invention can reduce harmful blue light by 10-50%, and at the same time has no obvious effect on the transmission of light in other wavelength bands.

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Abstract

本发明揭露一种偏光板及液晶显示装置，有效降低蓝光中低波段蓝光比例的同时，可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。

Description

一种偏光板及液晶显示装置 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种偏光板及液晶显示装置。
 背景技术
随着电子科技以及显示技术的迅猛发展，液晶显示装置(Liquid Crystal Display，LCD)得到了广泛的应用，如：液晶电视、智能手机、计算机、平板电脑等现代化信息设备上。现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括液晶显示面板及背光模组(Back Light Unit，简称BLU)。
液晶显示面板通常是由一彩膜(Color Filter，简称CF)基板、一薄膜晶体管(Thin Film Transistor，简称TFT)阵列基板以及一配置于两基板间的液晶层(Liquid Crystal Layer，简称LCL) 所构成。CF基板远离液晶层的一侧贴附一偏光板，TFT阵列基板远离液晶层的一侧也贴附一偏光板。液晶显示面板通过电场对液晶分子的取向进行控制，改变光的偏振状态，并藉由偏光片实现光路的穿透与阻挡，达到显示的目的。背光模组通常以发光二极管(Light Emitting Diode，简称LED)作为背光源。
蓝光大量存在于电脑显示屏、荧光灯、智能手机屏、数码产品显示屏、LED灯等光线中，蓝光指的是波长为 380～480nm的高能光，其波长短、能量高。特别的，波长小于455nm内的低波段蓝光会使眼睛内的黄斑区毒素量增高，严重威胁人们的眼睛健康。日常生活中蓝光随处可见，但人们接触到的有害蓝光主要来源为LED液晶显示装置。
现有市场上的液晶显示装置一般都采用LED作为背光源。由于背光源需要白光的效果，所以业界使用蓝色LED混合黄色荧光粉来形成白光。由于蓝色LED是一个主体硬件，因此这种白光中的蓝色光谱就拥有一个波峰，从而形成了我们所说的有害蓝光伤眼的问题。 LED液晶电视作为客厅娱乐的主要载体，大部分家庭选择晚上睡前看电视，甚至不少民众会在看电视时关上灯光，加之闪屏等因素，导致有害蓝光对眼睛造成伤害。长期积累造成眼睛疲劳、干涩、视力下降，同时还容易激发褐色色素，使皮肤长出黄斑、雀斑。由于有害蓝光对眼睛的伤害是日积月累的，因此电视蓝光对眼睛的伤害要引起足够的重视，特别是青少年儿童。
 技术问题
目前比较常用的低波段蓝光护眼方式大致分为以下几类：
第一种方式是通过在显示装置表面外加膜材以降低蓝光的透过，即市面上常用的防蓝光护眼保护膜，通过贴在显示装置外起到蓝光阻挡的作用。但是该方式成本较高，需要由消费者自行购买；同时该方式会使得画面品味变差，即画面品黄；另外该方式会降低显示亮度。
第二种方式是通过手机软件调节，即通过调整背光源LED发光效率，降低蓝光整体亮度，进而降低波长小于455nm的低波段蓝光亮度，这也是目前手机上所使用的防蓝光护眼模式。该方式相对于第一种方式不需要增加额外成本；但是波长小于455nm的低波段蓝光的剔除效果并不明显；同时依旧存在着画面品味偏黄的问题。
因此，针对目前液晶显示装置普遍存在着波长小于455nm的低波段蓝光，其会对使用者眼部造成不可逆的伤害，尤其是对青少年儿童的眼睛损害尤为严重，而目前主要使用的低波段蓝光护眼方式普遍存在画面品味失真的问题，如何降低有害蓝光，而不影响显示品味，是液晶显示技术发展过程中亟待解决的问题。
 技术解决方案
本发明的目的在于，提供一种偏光板及液晶显示装置，针对目前液晶显示装置普遍存在着波长小于455nm的低波段蓝光，其会对使用者眼部造成不可逆的伤害，尤其是对青少年儿童的眼睛损害尤为严重，而目前主要使用的低波段蓝光护眼方式普遍存在画面品味失真的问题，可以有效降低有害蓝光的同时保证显示品味，避免显示失真的问题。
为实现上述目的，本发明提供了一种偏光板，所述偏光板包括：偏光层，所述偏光层的材料为聚乙烯醇或交联聚乙烯醇栓塞微球；低波段蓝光膜，设置在所述偏光层的上侧或下侧，其中，定义波长小于455nm的蓝光为低波段蓝光；支撑层，设置在所述偏光层的远离所述低波段蓝光膜的一侧，所述支撑层的材料为三醋酸纤维素或环烯烃共聚物；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接，所述粘着层的材料为压敏胶；以及保护膜，设置在所述偏光层的上侧。
为实现上述目的，本发明还提供了一种偏光板，所述偏光板包括：偏光层；低波段蓝光膜，设置在所述偏光层的上侧或下侧，其中，定义波长小于455nm的蓝光为低波段蓝光；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接；以及保护膜，设置在所述偏光层的上侧。
为实现上述目的，本发明还提供了一种液晶显示装置，所述液晶显示装置包括液晶显示面板和背光模组，所述液晶显示面板包括阵列基板、彩膜基板以及设置在所述阵列基板和所述彩膜基板之间的液晶层，所述背光模组设置在所述阵列基板的远离所述液晶层的一侧；所述液晶显示装置还包括：第一偏光板，设置在所述彩膜基板的远离所述液晶层的一侧；以及第二偏光板，设置在所述阵列基板和所述背光模组之间；其中，所述第一偏光板与所述第二偏光板的至少其中之一包括：偏光层；低波段蓝光膜，设置在所述偏光层的上侧或下侧，其中，定义波长小于455nm的蓝光为低波段蓝光；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接；以及保护膜，设置在所述偏光层的上侧。
 有益效果
本发明在不增加膜材的基础上，通过对偏光板架构进行调整，使用低波段蓝光膜替代支撑层，起到对有害波长蓝光过滤效果，来降低蓝光伤害，可以降低约50%的有害蓝光，实现了防低波段蓝光护眼效果。相对于外贴抗蓝光玻璃，本发明偏光板有效降低蓝光中低波段蓝光比例的同时，可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本发明偏光板可以有效控制成本，具有较强的使用性，利于推广。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1，本发明偏光板第一实施例的层状结构示意图；
图2，本发明偏光板第二实施例的层状结构示意图；
图3，本发明偏光板第三实施例的层状结构示意图；
图4，本发明偏光板第四实施例的层状结构示意图；
图5，本发明偏光板第五实施例的层状结构示意图；
图6，本发明偏光板第六实施例的层状结构示意图；
图7，本发明液晶显示装置一实施例的层状结构示意图；
图8A，采用本发明偏光板在LED背光下的透过频谱；
图8B，采用现有技术中偏光板在LED背光下的透过频谱。
 本发明的实施方式
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
本发明偏光板，包括：偏光层；低波段蓝光膜，设置在所述偏光层的上侧或下侧；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接；以及保护膜，设置在所述偏光层的上侧。其中，定义波长小于455nm的蓝光为低波段蓝光。由于波长小于455nm的低波段蓝光会使眼睛内的黄斑区毒素量增高，严重威胁人们的眼睛健康，因此防护该低波段蓝光有重要意义。
本发明偏光板在不增加膜材的基础上，通过对偏光板架构进行调整，使用低波段蓝光膜替代支撑层（COP/TAC/CAT等），起到对有害波长蓝光过滤效果，来降低蓝光伤害，可以降低约50%的有害蓝光，实现了防低波段蓝光护眼效果。相对于外贴抗蓝光玻璃，本发明偏光板有效降低蓝光中低波段蓝光比例的同时，可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本发明偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图1，本发明偏光板第一实施例的层状结构示意图，图1中左侧为本发明偏光板的层状结构示意图，图1中右侧为现有技术中偏光板的层状结构示意图作为对比。在本实施例中，所述偏光板包括依次层叠设置的离型膜11、偏光层12、低波段蓝光膜13、增反膜14以及保护膜15。
所述离型膜11，设置在所述偏光层12的下侧，所述离型膜11通过粘着层111与所述偏光层12连接，用于将偏光层 12与外界环境进行隔离。也即，当所述低波段蓝光膜13设置在所述偏光层12的上侧时，所述离型膜11通过粘着层111与所述偏光层12连接。离型膜（release film）是指薄膜表面能有区分的薄膜，离型膜与特定的材料在有限的条件下接触后不具有粘性，或轻微的粘性。所述粘着层111的材料为压敏胶（pressure sensitive adhesives，简称PSA）。
所述偏光层12，用于对入射光进行偏光处理后出射，其优选为聚乙烯醇(Polyvinyl Alcohol，简称PVA)或交联聚乙烯醇栓塞微球(polyvinyl alcohol microspheres，简称PVA-Ms)。
所述低波段蓝光膜13，设置在所述偏光层12的上侧，用于过滤波长小于455nm的低波段蓝光，起到对有害波长蓝光过滤效果，有效降低蓝光中低波段蓝光比例，来降低蓝光伤害。本实施例在不增加膜材的基础上，通过对偏光板架构进行调整，实现了防低波段蓝光护眼效果。所述低波段蓝光膜13可以使用日本Toray公司生产的低蓝光膜，也可以使用中国金张科技生产的低蓝光膜，可将有害蓝光减少10~50%，同时对其它波段光的透过无明显影响。
所述增反膜14，设置在所述保护膜15的下侧，所述增反膜14通过粘着层111与所述低波段蓝光膜13连接。也即，当所述低波段蓝光膜13设置在所述偏光层12的上侧时，所述增反膜14通过粘着层111与所述低波段蓝光膜13连接。增反膜 (Advanced Polarizer Film，简称APF)是利用在薄膜上、下表面反射光相长干涉的原理，使反射光得到增强，工艺上通常采用多层膜。所述粘着层111的材料为压敏胶（PSA）。
所述保护膜15，设置在所述偏光层12的上侧。具体的，在本实施例中，所述保护膜15设置在所述增反膜14的上侧。保护膜（Protective film）具有抗磨、抗划伤、防刮花、防反光的作用。
作为对比，现有技术中偏光板包括依次层叠设置的离型膜21、偏光层22、第一支撑层23、增反膜24以及保护膜25；离型膜21与偏光层22之间通过粘着层211连接，第一支撑层23与增反膜24之间通过粘着层211连接。也即，本实施例偏光板在不增加膜材的基础上，通过使用低波段蓝光膜13替代现有技术中偏光板的第一支撑层23，来降低蓝光伤害，实现了防低波段蓝光护眼效果。同时相比于外贴抗蓝光玻璃，本实施例偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本实施例偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图2，本发明偏光板第二实施例的层状结构示意图，图2中左侧为本发明偏光板的层状结构示意图，图2中右侧为现有技术中偏光板的层状结构示意图作为对比。与图1所示第一实施例的不同之处在于，在本实施例中，所述低波段蓝光膜13设置在所述偏光层的下侧；即，本实施例偏光板包括依次层叠设置的离型膜11、低波段蓝光膜13、偏光层12、增反膜14以及保护膜15。
所述离型膜11，设置在所述低波段蓝光膜13的下侧，所述离型膜11通过粘着层111与所述低波段蓝光膜13连接，用于将偏光层12与外界环境进行隔离。也即，当所述低波段蓝光膜13设置在所述偏光层12的下侧时，所述离型膜11通过粘着层111与所述低波段蓝光膜13连接。所述粘着层111的材料为压敏胶（PSA）。
所述低波段蓝光膜13，设置在所述偏光层12的下侧，用于过滤波长小于455nm的低波段蓝光，起到对有害波长蓝光过滤效果，有效降低蓝光中低波段蓝光比例，来降低蓝光伤害。本实施例在不增加膜材的基础上，通过对偏光板架构进行调整，实现了防低波段蓝光护眼效果。
所述偏光层12，用于对入射光进行偏光处理后出射，其优选为聚乙烯醇(PVA)或交联聚乙烯醇栓塞微球(PVA-Ms)。
所述增反膜14，设置在所述保护膜15的下侧，所述增反膜14通过粘着层111与所述偏光层12连接。也即，当所述低波段蓝光膜13设置在所述偏光层12的下侧时，所述增反膜14通过粘着层111与所述偏光层12连接。增反膜 (APF)工艺上通常采用多层膜。所述粘着层111的材料为压敏胶（PSA）。
所述保护膜15，设置在所述偏光层12的上侧。具体的，在本实施例中，所述保护膜15设置在所述增反膜14的上侧。保护膜（Protective film）具有抗磨、抗划伤、防刮花、防反光的作用。
作为对比，现有技术中偏光板包括依次层叠设置的离型膜21、第一支撑层23、偏光层22、增反膜24以及保护膜25；离型膜21与支撑层23之间通过粘着层211连接，第一支撑层23与增反膜24之间通过粘着层211连接。也即，本实施例偏光板在不增加膜材的基础上，通过使用低波段蓝光膜13替代现有技术中偏光板的第一支撑层23，来降低蓝光伤害，实现了防低波段蓝光护眼效果。同时相比于外贴抗蓝光玻璃，本实施例偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本实施例偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图3，本发明偏光板第三实施例的层状结构示意图，图3中左侧为本发明偏光板的层状结构示意图，图3中右侧为现有技术中偏光板的层状结构示意图作为对比。与图1所示第一实施例的不同之处在于，在本实施例中，在所述偏光层的下侧还设置有支撑层31；即，本实施例偏光板包括依次层叠设置的离型膜11、支撑层31、偏光层12、低波段蓝光膜13、增反膜14以及保护膜15。
所述离型膜11，设置在所述支撑层31的下侧，所述离型膜11通过粘着层111与所述支撑层31连接，用于将偏光层12与外界环境进行隔离。也即，当所述支撑层31设置在所述偏光层12的下侧时，所述离型膜11通过粘着层111与所述支撑层31连接。所述粘着层111的材料为压敏胶（PSA）。
所述支撑层31，设置在所述偏光层12的下侧，用于隔绝水分和空气，保护偏光层12。所述支撑层31的材料为三醋酸纤维素(Tri Acetic acid Celluose，简称TAC)或环烯烃共聚物(Cyclo Olefin Polymers，简称COP)或聚甲基丙烯酸甲酯（CAT）等。
所述偏光层12，用于对入射光进行偏光处理后出射，其优选为聚乙烯醇(PVA)或交联聚乙烯醇栓塞微球(PVA-Ms)。
所述低波段蓝光膜13，设置在所述偏光层12的上侧，用于过滤波长小于455nm的低波段蓝光，起到对有害波长蓝光过滤效果，有效降低蓝光中低波段蓝光比例，来降低蓝光伤害。本实施例在不增加膜材的基础上，通过对偏光板架构进行调整，实现了防低波段蓝光护眼效果。
所述增反膜14，设置在所述保护膜15的下侧，所述增反膜14通过粘着层111与所述低波段蓝光膜13连接。也即，当所述低波段蓝光膜13设置在所述偏光层12的上侧时，所述增反膜14通过粘着层111与所述低波段蓝光膜13连接。增反膜 (APF)工艺上通常采用多层膜。所述粘着层111的材料为压敏胶（PSA）。
所述保护膜15，设置在所述偏光层12的上侧。具体的，在本实施例中，所述保护膜15设置在所述增反膜14的上侧。保护膜（Protective film）具有抗磨、抗划伤、防刮花、防反光的作用。
作为对比，现有技术中偏光板包括依次层叠设置的离型膜21、第一支撑层231、偏光层22、第二支撑层232、增反膜24以及保护膜25；离型膜21与第一支撑层231之间通过粘着层211连接，第二支撑层232与增反膜24之间通过粘着层211连接。也即，本实施例偏光板在不增加膜材的基础上，通过使用低波段蓝光膜13替代现有技术中偏光板的偏光层22上侧的第二支撑层232，来降低蓝光伤害，实现了防低波段蓝光护眼效果。同时相比于外贴抗蓝光玻璃，本实施例偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本实施例偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图4，本发明偏光板第四实施例的层状结构示意图，图4中左侧为本发明偏光板的层状结构示意图，图4中右侧为现有技术中偏光板的层状结构示意图作为对比。与图3所示第三实施例的不同之处在于，在本实施例中，低波段蓝光膜13设置在所述偏光层的下侧、支撑层31设置在所述偏光层的上侧；即，本实施例偏光板包括依次层叠设置的离型膜11、低波段蓝光膜13、偏光层12、支撑层31、增反膜14以及保护膜15。
所述离型膜11，设置在所述低波段蓝光膜13的下侧，所述离型膜11通过粘着层111与所述低波段蓝光膜13连接，用于将偏光层12与外界环境进行隔离。也即，当所述低波段蓝光膜13设置在所述偏光层12的下侧时，所述离型膜11通过粘着层111与所述低波段蓝光膜13连接。所述粘着层111的材料为压敏胶（PSA）。
所述低波段蓝光膜13，设置在所述偏光层12的下侧，用于过滤波长小于455nm的低波段蓝光，起到对有害波长蓝光过滤效果，有效降低蓝光中低波段蓝光比例，来降低蓝光伤害。本实施例在不增加膜材的基础上，通过对偏光板架构进行调整，实现了防低波段蓝光护眼效果。
所述偏光层12，用于对入射光进行偏光处理后出射，其优选为聚乙烯醇(PVA)或交联聚乙烯醇栓塞微球(PVA-Ms)。
所述支撑层31，设置在所述偏光层12的上侧，用于隔绝水分和空气，保护偏光层12。所述支撑层31的材料为三醋酸纤维素(Tri Acetic acid Celluose，简称TAC)或环烯烃共聚物(Cyclo Olefin Polymers，简称COP)或CAT等。
所述增反膜14，设置在所述保护膜15的下侧，所述增反膜14通过粘着层111与所述支撑层31连接。也即，当所述支撑层31设置在所述偏光层12的上侧时，所述增反膜14通过粘着层111与所述支撑层31连接。增反膜 (APF)工艺上通常采用多层膜。所述粘着层111的材料为压敏胶（PSA）。
所述保护膜15，设置在所述偏光层12的上侧。具体的，在本实施例中，所述保护膜15设置在所述增反膜14的上侧。保护膜（Protective film）具有抗磨、抗划伤、防刮花、防反光的作用。
作为对比，现有技术中偏光板包括依次层叠设置的离型膜21、第一支撑层231、偏光层22、第一支撑层232、增反膜24以及保护膜25；离型膜21与第一支撑层231之间通过粘着层211连接，第二支撑层232与增反膜24之间通过粘着层211连接。也即，本实施例偏光板在不增加膜材的基础上，通过使用低波段蓝光膜13替代现有技术中偏光板的偏光层22下侧的第一支撑层231，来降低蓝光伤害，实现了防低波段蓝光护眼效果。同时相比于外贴抗蓝光玻璃，本实施例偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本实施例偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图5，本发明偏光板第五实施例的层状结构示意图，图5中左侧为本发明偏光板的层状结构示意图，图5中右侧为现有技术中偏光板的层状结构示意图作为对比。与图3所示第三实施例的不同之处在于，在本实施例中，所述偏光板还包括：设置在所述保护膜15的下侧的表面处理层51（也即表面处理层51替代图3中的增反膜14）；即，本实施例偏光板包括依次层叠设置的离型膜11、支撑层31、偏光层12、低波段蓝光膜13、表面处理层51以及保护膜15。
所述离型膜11，设置在所述支撑层31的下侧，所述离型膜11通过粘着层111与所述支撑层31连接，用于将偏光层12与外界环境进行隔离。也即，当所述支撑层31设置在所述偏光层12的下侧时，所述离型膜11通过粘着层111与所述支撑层31连接。所述粘着层111的材料为压敏胶（PSA）。
所述支撑层31，设置在所述偏光层12的下侧，用于隔绝水分和空气，保护偏光层12。所述支撑层31的材料为三醋酸纤维素(Tri Acetic acid Celluose，简称TAC)或环烯烃共聚物(Cyclo Olefin Polymers，简称COP)或CAT等。
所述偏光层12，用于对入射光进行偏光处理后出射，其优选为聚乙烯醇(PVA)或交联聚乙烯醇栓塞微球(PVA-Ms)。
所述低波段蓝光膜13，设置在所述偏光层12的上侧，用于过滤波长小于455nm的低波段蓝光，起到对有害波长蓝光过滤效果，有效降低蓝光中低波段蓝光比例，来降低蓝光伤害。本实施例在不增加膜材的基础上，通过对偏光板架构进行调整，实现了防低波段蓝光护眼效果。
所述表面处理层51，设置在所述保护膜15的下侧，所述表面处理层51设置在所述低波段蓝光膜13的上侧，用于对所述低波段蓝光膜13进行表面处理，提高画面清晰度。也即，当所述低波段蓝光膜13设置在所述偏光层12的上侧时，所述表面处理层51设置在所述低波段蓝光膜13的上侧。所述表面处理层51选自表面防眩层（AG）、表面低反射层/表面不反射层（LR/AR）、表面硬化层（HC）的其中一种或多种。
所述保护膜15，设置在所述偏光层12的上侧。具体的，在本实施例中，所述保护膜15设置在所述表面处理层51的上侧。保护膜（Protective film）具有抗磨、抗划伤、防刮花、防反光的作用。
作为对比，现有技术中偏光板包括依次层叠设置的离型膜21、第一支撑层231、偏光层22、第一支撑层232、表面处理层26以及保护膜25；离型膜21与第一支撑层231之间通过粘着层211连接。也即，本实施例偏光板在不增加膜材的基础上，通过使用低波段蓝光膜13替代现有技术中偏光板的偏光层22上侧的第二支撑层232，来降低蓝光伤害，实现了防低波段蓝光护眼效果。同时相比于外贴抗蓝光玻璃，本实施例偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本实施例偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图6，本发明偏光板第六实施例的层状结构示意图，图6中左侧为本发明偏光板的层状结构示意图，图6中右侧为现有技术中偏光板的层状结构示意图作为对比。与图5所示第五实施例的不同之处在于，在本实施例中，低波段蓝光膜13设置在所述偏光层的下侧、支撑层31设置在所述偏光层的上侧；即，本实施例偏光板包括依次层叠设置的离型膜11、低波段蓝光膜13、偏光层12、支撑层31、表面处理层51以及保护膜15。
所述离型膜11，设置在所述低波段蓝光膜13的下侧，所述离型膜11通过粘着层111与所述低波段蓝光膜13连接，用于将偏光层12与外界环境进行隔离。也即，当所述低波段蓝光膜13设置在所述偏光层12的下侧时，所述离型膜11通过粘着层111与所述低波段蓝光膜13连接。所述粘着层111的材料为压敏胶（PSA）。
所述低波段蓝光膜13，设置在所述偏光层12的下侧，用于过滤波长小于455nm的低波段蓝光，起到对有害波长蓝光过滤效果，有效降低蓝光中低波段蓝光比例，来降低蓝光伤害。本实施例在不增加膜材的基础上，通过对偏光板架构进行调整，实现了防低波段蓝光护眼效果。
所述偏光层12，用于对入射光进行偏光处理后出射，其优选为聚乙烯醇(PVA)或交联聚乙烯醇栓塞微球(PVA-Ms)。
所述支撑层31，设置在所述偏光层12的上侧，用于隔绝水分和空气，保护偏光层12。所述支撑层31的材料为三醋酸纤维素(Tri Acetic acid Celluose，简称TAC)或环烯烃共聚物(Cyclo Olefin Polymers，简称COP)或CAT等。
所述表面处理层51，设置在所述保护膜15的下侧，所述表面处理层51设置在所述支撑层31的上侧，用于对所述支撑层31进行表面处理，提高画面清晰度。也即，当所述支撑层31设置在所述偏光层12的上侧时，所述表面处理层51设置在所述支撑层31的上侧。所述表面处理层51选自表面防眩层（AG）、表面低反射层/表面不反射层（LR/AR）、表面硬化层（HC）的其中一种或多种。
所述保护膜15，设置在所述偏光层12的上侧。具体的，。保护膜（Protective film）具有抗磨、抗划伤、防刮花、防反光的作用。
作为对比，现有技术中偏光板包括依次层叠设置的离型膜21、第一支撑层231、偏光层22、第一支撑层232、表面处理层26以及保护膜25；离型膜21与第一支撑层231之间通过粘着层211连接。也即，本实施例偏光板在不增加膜材的基础上，通过使用低波段蓝光膜13替代现有技术中偏光板的偏光层22下侧的第一支撑层231，来降低蓝光伤害，实现了防低波段蓝光护眼效果。同时相比于外贴抗蓝光玻璃，本实施例偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题。同时，相比于现行多数低波段蓝光产品，本实施例偏光板可以有效控制成本，具有较强的使用性，利于推广。
参考图7，本发明液晶显示装置一实施例的层状结构示意图。本实施例中，所述液晶显示装置包括液晶显示面板71和背光模组72，所述背光模组72设置在所述液晶显示面板71的下侧；所述液晶显示装置还包括：设置在所述液晶显示面板71的上侧的第一偏光板73，以及，设置在所述液晶显示面板71和所述背光模组72之间的第二偏光板74；其中，所述第一偏光板73与所述第二偏光板74的至少其中之一采用本发明上述实施例一至实施例六任一所述的偏光板。也即至少其中之一的偏光板通过使用低波段蓝光膜替代现有技术中偏光板的偏光层上侧或下侧的支撑层，来降低蓝光伤害，实现了防低波段蓝光护眼效果；相比于外贴抗蓝光玻璃，本发明采用的偏光板可以有效降低对偏光板整体厚度的影响，且对其它波段光的透过无明显影响，避免穿透率降低，可以很大程度上保证显示品味，避免显示失真的问题；同时，相比于现行多数低波段蓝光产品，本发明采用的偏光板可以有效控制成本，具有较强的使用性，利于推广。
具体的，所述液晶显示面板71由一彩膜(Color Filter，简称CF)基板、一薄膜晶体管(Thin Film Transistor，简称TFT)阵列基板以及一配置于两基板间的液晶层(Liquid Crystal Layer，简称LCL) 所构成。CF基板远离液晶层的一侧贴附所述第一偏光板73，TFT阵列基板远离液晶层的一侧贴附所述第二偏光板74。所述背光模组72设置在所述阵列基板的远离所述液晶层的一侧；所述背光模组72以发光二极管(Light Emitting Diode，简称LED)作为背光源。
优选的，所述第二偏光板74采用本发明上述实施例一至实施例六任一所述的偏光板，也即本发明提供的具有低波段蓝光膜的偏光板使用在所述背光模组72与所述阵列基板之间的下片偏光板中，这样低波段蓝光膜的反射影响较小。
优选的，所述第二偏光板74采用本发明上述实施例二、实施例四或实施例六任一所述的偏光板，也即本发明提供的具有低波段蓝光膜的偏光板使用在所述背光模组72与所述阵列基板之间的下片偏光板中；且具有低波段蓝光膜的偏光板中，低波段蓝光膜741设置在第二偏光板74的偏光层（PVA）742的下侧。通过将低波段蓝光膜设置在下片偏光板的偏光层（PVA）与背光模组（BLU）之间，背光模组的背光源LED产生的有害蓝光通过背光模组反射，再经过片偏光板的低波段蓝光膜后有害部分被吸收，之后的光通过液晶显示面板进行正常显示；同时因上下偏光板的双层PVA（第二偏光板74的偏光层742与第一偏光板73的偏光层732）的偏振作用，也可以进一步避免低波段蓝光膜的反射光，有效降低低波段蓝光膜的反射影响。
参考图8A-8B，其中，图8A为采用本发明偏光板在LED背光下的透过频谱，图8B为采用现有技术中偏光板在LED背光下的透过频谱；图中仅标示出部分光的种类（蓝光、绿光、黄光、红光）及对应的大致波段范围。其中，本发明偏光板中的低波段蓝光膜采用中国金张科技生产的低波段蓝光薄膜。由图8A-8B比较可以看出，本发明偏光板可将有害蓝光减少10~50%，同时对其它波段光的透过无明显影响。
 工业实用性
本申请的主题可以在工业中制造和使用，具备工业实用性。

Claims (20)

  1. 一种偏光板，其中，所述偏光板包括：偏光层，所述偏光层的材料为聚乙烯醇或交联聚乙烯醇栓塞微球；低波段蓝光膜，设置在所述偏光层的上侧或下侧，其中，定义波长小于455nm的蓝光为低波段蓝光；支撑层，设置在所述偏光层的远离所述低波段蓝光膜的一侧，所述支撑层的材料为三醋酸纤维素或环烯烃共聚物；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接，所述粘着层的材料为压敏胶；以及保护膜，设置在所述偏光层的上侧。
  2. 如权利要求1所述的偏光板，其中，所述偏光板还包括：设置在所述保护膜的下侧的增反膜；当所述低波段蓝光膜设置在所述偏光层的上侧时，所述支撑层设置在所述偏光层的下侧，所述增反膜通过粘着层与所述低波段蓝光膜连接；当所述低波段蓝光膜设置在所述偏光层的下侧时，所述支撑层设置在所述偏光层的上侧，所述增反膜通过粘着层与所述支撑层连接。
  3. 如权利要求1所述的偏光板，其中，所述偏光板还包括：设置在所述保护膜的下侧的表面处理层；当所述低波段蓝光膜设置在所述偏光层上侧时，所述表面处理层设置在所述低波段蓝光膜上侧；当所述支撑层设置在所述偏光层上侧时，所述表面处理层设置在所述支撑层上侧。
  4. 如权利要求3所述的偏光板，其中，所述表面处理层选自表面防眩层、表面低反射层/表面不反射层、表面硬化层的其中一种或多种。
  5. 一种偏光板，其中，所述偏光板包括：偏光层；低波段蓝光膜，设置在所述偏光层的上侧或下侧，其中，定义波长小于455nm的蓝光为低波段蓝光；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接；以及保护膜，设置在所述偏光层的上侧。
  6. 如权利要求5所述的偏光板，其中，所述偏光层的材料为聚乙烯醇或交联聚乙烯醇栓塞微球。
  7. 如权利要求5所述的偏光板，其中，所述粘着层的材料为压敏胶。
  8. 如权利要求5所述的偏光板，其中，所述偏光板还包括：设置在所述保护膜的下侧的增反膜；当所述低波段蓝光膜设置在所述偏光层的上侧时，所述增反膜通过粘着层与所述低波段蓝光膜连接；当所述低波段蓝光膜设置在所述偏光层的下侧时，所述增反膜通过粘着层与所述偏光层连接。
  9. 如权利要求5所述的偏光板，其中，所述偏光板还包括：支撑层，设置在所述偏光层的远离所述低波段蓝光膜的一侧。
  10. 如权利要求9所述的偏光板，其中，所述支撑层的材料为三醋酸纤维素或环烯烃共聚物。
  11. 如权利要求9所述的偏光板，其中，所述偏光板还包括：设置在所述保护膜的下侧的增反膜；当所述低波段蓝光膜设置在所述偏光层的上侧时，所述支撑层设置在所述偏光层的下侧，所述增反膜通过粘着层与所述低波段蓝光膜连接；当所述低波段蓝光膜设置在所述偏光层的下侧时，所述支撑层设置在所述偏光层的上侧，所述增反膜通过粘着层与所述支撑层连接。
  12. 如权利要求9所述的偏光板，其中，所述偏光板还包括：设置在所述保护膜的下侧的表面处理层；当所述低波段蓝光膜设置在所述偏光层上侧时，所述表面处理层设置在所述低波段蓝光膜上侧；当所述支撑层设置在所述偏光层上侧时，所述表面处理层设置在所述支撑层上侧；所述表面处理层选自表面防眩层、表面低反射层/表面不反射层、表面硬化层的其中一种或多种。
  13. 一种液晶显示装置，所述液晶显示装置包括液晶显示面板和背光模组，所述液晶显示面板包括阵列基板、彩膜基板以及设置在所述阵列基板和所述彩膜基板之间的液晶层，所述背光模组设置在所述阵列基板的远离所述液晶层的一侧；其中，所述液晶显示装置还包括：第一偏光板，设置在所述彩膜基板的远离所述液晶层的一侧；以及第二偏光板，设置在所述阵列基板和所述背光模组之间；其中，所述第一偏光板与所述第二偏光板的至少其中之一包括：偏光层；低波段蓝光膜，设置在所述偏光层的上侧或下侧，其中，定义波长小于455nm的蓝光为低波段蓝光；离型膜，设置在所述偏光层的下侧，所述离型膜通过粘着层与所述偏光层或所述低波段蓝光膜连接；以及保护膜，设置在所述偏光层的上侧。
  14. 如权利要求13所述的液晶显示装置，其中，所述偏光层的材料为聚乙烯醇或交联聚乙烯醇栓塞微球。
  15. 如权利要求13所述的液晶显示装置，其中，所述粘着层的材料为压敏胶。
  16. 如权利要求13所述的液晶显示装置，其中，所述偏光板还包括：设置在所述保护膜的下侧的增反膜；当所述低波段蓝光膜设置在所述偏光层的上侧时，所述增反膜通过粘着层与所述低波段蓝光膜连接；当所述低波段蓝光膜设置在所述偏光层的下侧时，所述增反膜通过粘着层与所述偏光层连接。
  17. 如权利要求13所述的液晶显示装置，其中，所述偏光板还包括：支撑层，设置在所述偏光层的远离所述低波段蓝光膜的一侧。
  18. 如权利要求17所述的液晶显示装置，其中，所述支撑层的材料为三醋酸纤维素或环烯烃共聚物。
  19. 如权利要求17所述的液晶显示装置，其中，所述偏光板还包括：设置在所述保护膜的下侧的增反膜；当所述低波段蓝光膜设置在所述偏光层的上侧时，所述支撑层设置在所述偏光层的下侧，所述增反膜通过粘着层与所述低波段蓝光膜连接；当所述低波段蓝光膜设置在所述偏光层的下侧时，所述支撑层设置在所述偏光层的上侧，所述增反膜通过粘着层与所述支撑层连接。
  20. 如权利要求17所述的液晶显示装置，其中，所述偏光板还包括：设置在所述保护膜的下侧的表面处理层；当所述低波段蓝光膜设置在所述偏光层上侧时，所述表面处理层设置在所述低波段蓝光膜上侧；当所述支撑层设置在所述偏光层上侧时，所述表面处理层设置在所述支撑层上侧；所述表面处理层选自表面防眩层、表面低反射层/表面不反射层、表面硬化层的其中一种或多种。
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