WO2022217690A1 - 偏光片及显示装置 - Google Patents

偏光片及显示装置 Download PDF

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Publication number
WO2022217690A1
WO2022217690A1 PCT/CN2021/094097 CN2021094097W WO2022217690A1 WO 2022217690 A1 WO2022217690 A1 WO 2022217690A1 CN 2021094097 W CN2021094097 W CN 2021094097W WO 2022217690 A1 WO2022217690 A1 WO 2022217690A1
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WIPO (PCT)
Prior art keywords
layer
polarizer
adhesive layer
adhesive
light
Prior art date
Application number
PCT/CN2021/094097
Other languages
English (en)
French (fr)
Inventor
杨稳华
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US17/420,103 priority Critical patent/US20230139981A1/en
Publication of WO2022217690A1 publication Critical patent/WO2022217690A1/zh

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    • 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 
    • G02F1/0136—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  for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
    • 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
    • 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
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • 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
    • 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
    • G02B5/3041—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 comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—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 comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/868—Arrangements for polarized light emission
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/05—Function characteristic wavelength dependent
    • G02F2203/055—Function characteristic wavelength dependent wavelength filtering

Definitions

  • the present application relates to the field of display technology, and in particular, to a polarizer and a display device.
  • the polarizer in the existing display device is mainly used to convert the incident natural light into polarized light.
  • the polarizer is not limited to a single function.
  • Demand the color temperature of the OLED display screen will decrease after sunlight. If the color temperature decrease is too large, the color temperature of the OLED display screen will turn yellow after ultraviolet light.
  • the purpose of the present application is to provide a polarizer and a display device.
  • the polarizer By applying the polarizer to the display device, it can effectively solve the problem that the color temperature of the display panel is greatly reduced after being irradiated by the predetermined wavelength of light. The problem.
  • the present application also provides a polarizer, the polarizer includes a polarizer layer and at least one functional layer stacked with the polarizer layer, wherein a light absorber is added to the functional layer to reduce exposure to light with a preset wavelength transmittance.
  • the transmittance of the polarizer to the light of the preset wavelength is lower than 15%.
  • the range of the preset wavelength is between 200 nm and 480 nm.
  • the functional layer includes: at least one adhesive layer, the adhesive layer is disposed on one side of the polarizer and can be connected to a display panel; at least one protective layer, The protective layer is disposed on the other side of the polarizer.
  • the functional layer further includes a compensation layer;
  • the functional layer includes two adhesive layers, and the two adhesive layers are a first adhesive layer and a second adhesive layer respectively.
  • the protective layer is arranged on one side of the polarizing layer;
  • the first adhesive layer is arranged on the side of the polarizing layer away from the protective layer;
  • the compensation layer is arranged on the first adhesive layer the side away from the polarizing layer;
  • the second adhesive layer is disposed on the side of the compensation layer away from the first adhesive layer; wherein, the polarizer can pass through the second adhesive layer and a display panel fixed.
  • the protective layer includes a hardening treatment layer, and the hardening treatment layer is located on a side of the protective layer away from the polarizing layer.
  • the light absorbing agent is added to the hardening treatment layer.
  • the polarizer further includes a release film layer, the release film layer is disposed on the side of the adhesive layer away from the polarizer layer, and can be torn off to expose the adhesive layer.
  • the present application also provides a display device, including a display panel and a polarizing layer, the polarizing plate is fixed on one side of the display panel, and the polarizing plate includes a polarizing layer and at least one function stacked with the polarizing layer. layer, and a light absorber is added to the functional layer to reduce the transmittance of light with a preset wavelength.
  • the transmittance of the polarizer to the light of the preset wavelength is lower than 15%.
  • the range of the preset wavelength is between 200 nm and 480 nm.
  • the functional layer includes: at least one adhesive layer disposed between the polarizer and the display panel; at least one protective layer, the protective layer The layer is disposed on a side of the polarizer away from the display panel.
  • the functional layer further includes a compensation layer;
  • the functional layer includes two adhesive layers, and the two adhesive layers are a first adhesive layer and a second adhesive layer respectively.
  • the protective layer is arranged on one side of the polarizing layer;
  • the first adhesive layer is arranged on the side of the polarizing layer away from the protective layer;
  • the compensation layer is arranged on the first adhesive layer the side away from the polarizing layer;
  • the second adhesive layer is disposed on the side of the compensation layer away from the first adhesive layer; wherein the polarizer is connected to the display panel through the second adhesive layer fixed.
  • the protective layer includes a hardening treatment layer, and the hardening treatment layer is located on a side of the protective layer away from the polarizing layer.
  • the light absorbing agent is added to the hardening treatment layer.
  • the material of the polarizing layer includes polyvinyl alcohol.
  • the material of the protective layer includes at least one of cellulose triacetate, polymethyl methacrylate, polyethylene terephthalate, and cycloolefin polymer .
  • the material of the adhesive layer includes pressure-sensitive adhesive.
  • the display device further includes a cover plate, the cover plate is fixed to a side of the polarizer away from the display panel through an optical adhesive layer, and the optical A light absorbing agent is added to at least one layer of the adhesive layer and the functional layer to reduce the transmittance of light with a preset wavelength.
  • the proportion of the light absorber added in the optical adhesive layer is less than or equal to the proportion of the light absorber added in the functional layer.
  • the polarizer in the embodiments of the present application reduces the transmittance of the light of the preset wavelength by adding a light absorber in the functional layer.
  • a light absorber in the functional layer.
  • at least one of the first adhesive layer, the second adhesive layer, the protective layer, and the optical adhesive layer is added with the light absorber, so as to reduce the sensitivity to wavelengths ranging from 200 nm to 480 nm.
  • the transmittance of the light between the two so that the transmittance is lower than 15%, and the polarizer is applied to the display device, which can effectively solve the problem of the display after being irradiated by the preset wavelength of light.
  • the change of the luminescent material in the panel leads to the problem that the color temperature of the display panel is greatly reduced, and the viewing angle, color shift and light leakage in the dark state are improved, thereby improving the display effect of the display panel.
  • FIG. 1 is a schematic diagram of the structure of the display device according to the embodiment of the present application.
  • FIG. 2 is a second schematic diagram of the structure of the display device according to the embodiment of the present application.
  • FIG. 3 is a third schematic diagram of the structure of the display device according to the embodiment of the present application.
  • FIG. 5 is another schematic structural diagram of the polarizer described in the embodiment of the present application.
  • FIG. 6 is a fourth schematic diagram of the structure of the display device according to the embodiment of the present application.
  • the present application provides a display device 10 including a display panel 200 and a polarizer 100 , the polarizer 100 is fixed on one side of the display panel 200 , and the polarizer 100 includes a polarizer
  • the layer 110 and at least one functional layer 120 stacked with the polarizing layer 110 are provided with a light absorber 130 added to the functional layer 120 to reduce the transmittance of light with a predetermined wavelength.
  • the functional layer 120 includes at least one adhesive layer 121 and at least one protective layer 122, the adhesive layer 121 is disposed between the polarizer 100 and the display panel 200; the protective layer 122 is disposed on the
  • the polarizer 100 is away from the side of the display panel 200 .
  • the light absorber 130 is uniformly distributed on the functional layer 120 , which can ensure the uniform absorption of the light of the preset wavelength by the polarizer 100 and improve the uniformity of light transmission of the polarizer 100 .
  • the side of the adhesive layer 121 away from the polarizing layer 110 is used to attach the polarizer 100 to a bonding base, and the bonding base can be any display panel or display cover plate.
  • the embodiment is not limited.
  • the polarizing layer 110 is the core part of the polarizer 100 to realize the polarizing function.
  • the material of the polarizing layer 110 includes polyvinyl alcohol (Poly Vinyl Alcohol, PVA).
  • the thickness of the polarizing layer 110 is between 10um and 30um. time, for example: 15um, 20um, 25um, etc.
  • the protective layer 122 is provided on one side of the polarizing layer, which can be used to support and protect the polarizing layer 110, and It can effectively prevent the polarizing layer 110 from shrinking, deforming, fading due to water absorption and other problems caused by the influence of the external environment.
  • anti-reflection treatment and anti-glare treatment may also be performed on the surface of the protective layer 122 to meet diversified requirements.
  • the adhesive layer 121 and the protective layer 122 is added with a light absorber 130 to reduce the transmittance of the light of the preset wavelength, mainly by The light absorber 130 absorbs the light of the preset wavelength, thereby reducing the damage ability of the light of the preset wavelength to the polarizing layer 110 in the polarizer 100 and enhancing the stability of the polarizing layer 110 .
  • the preset wavelength range in this application is between 200nm and 480nm.
  • the preset wavelength light includes: ultraviolet light with a wavelength range of 200nm to 380nm and light with a wavelength range of 380nm to 480nm.
  • Visible light for example, ultraviolet light with a wavelength of 340 nm, visible light with a wavelength of 400 nm, visible light with a wavelength of 420 nm, and the like.
  • the light absorber 130 reduces the ultraviolet light with a wavelength range of 200nm to 380nm and the wavelength range of 380nm by absorbing ultraviolet light with a wavelength range of 200nm to 380nm and visible light with a wavelength range of 380nm to 480nm.
  • the transmittance of visible light between 480 nm and 480 nm further improves the UV absorption resistance of the polarizer 100 .
  • the setting of the light absorber 130 can make the transmittance of the polarizer 100 to the light of the preset wavelength be lower than 15%, that is, for ultraviolet light with a wavelength range of 200nm to 380nm and a wavelength range of The transmittance of visible light between 380 nm and 480 nm is lower than 15%, and preferably, the transmittance of the polarizer 100 to the light of the preset wavelength is lower than 12%.
  • the specific range of the preset wavelength in this embodiment and the range of the transmittance of the polarizer 100 to the light of the preset wavelength are also applicable to any implementation in this application. For example, this article will not repeat them.
  • the functional layer 120 further includes a compensation layer 140 , the functional layer 120 includes two adhesive layers 121 , and the two adhesive layers 121 are the first The adhesive layer 1211 and the second adhesive layer 1212; the first adhesive layer 1211 is disposed on one side of the polarizing layer 110; the compensation layer 140 is disposed on a side of the first adhesive layer 1211 away from the polarizing layer 110 The second adhesive layer 1212 is disposed on the side of the compensation layer 140 away from the first adhesive layer 1211 ; the protective layer 122 is disposed on the other side of the polarizing layer 110 .
  • the light absorber 130 is added to at least one of the first adhesive layer 1211 , the second adhesive layer 1212 and the protective layer 122 to reduce the transmission of light of the preset wavelength Rate.
  • the side of the second adhesive layer 1212 away from the compensation layer 140 is used to attach the polarizer 100 to a bonding base.
  • the bonding base can be any display panel or display cover. In this embodiment Examples are not limited.
  • the compensation layer 140 has the function of polarization supplement, and compensates or corrects the phase difference under different viewing angles to a certain extent, so as to improve the quality of the display image transmitted through the polarizer 100 .
  • the compensation layer 140 can also improve characteristics such as viewing angle, color shift, and dark-state light leakage.
  • the addition position of the light absorber 130 in this embodiment is not limited to FIG. 2 , and the light absorber 130 may also be added to the first adhesive layer 1211 and the within the protective layer 122 .
  • the compensation layer 140 is further integrated with a polarized brightness enhancement film, which can effectively improve the transmittance of the polarizer 100 to light other than the preset wavelength.
  • the protective layer 122 includes a hardening treatment layer 1221 , and the hardening treatment layer 1221 is located on the side of the protective layer 122 away from the polarizing layer 110 .
  • the hardening treatment layer 1221 is The layer 1221 is a part of the protective layer 122 , that is, exists inside the protective layer 122 and is disposed away from the polarizing layer 110 .
  • the light absorbing agent 130 is added to the protective layer 122
  • the light absorbing agent 130 is added to the hardening treatment layer 1221 .
  • the hardened layer 1221 may be provided in the protective layer 122 in the above embodiments.
  • the hardened layer 1221 may or may not be provided in the protective layer 122, which is not limited in this application. It can be understood by those skilled in the art that the addition position of the light absorber 130 is not limited to FIG. 3 , and the hardened layer 1221 may be disposed on all positions of the polarizer 100 described in any embodiment of the present application.
  • the protective layer 122 is not limited to the structure of the polarizer 100 shown in FIG. 3 .
  • the hardened layer 1221 can enhance the hardness, wear resistance and erosion resistance of the polarizer 100, and the hardness of the polarizer 100 provided with the hardened layer 1221 can reach 3H or more.
  • the polarizer 100 further includes a release film layer 150 , and the release film layer 150 is disposed on a side of the adhesive layer 121 away from the polarizer layer 110 .
  • the release film layer 150 is disposed on the side of the first adhesive layer 1211 or the second adhesive layer 1212 away from the polarizing layer 110 , which is not limited to FIG. 4 .
  • the release film layer 150 may be disposed in the polarizer 100 described in any embodiment of the present application, and is not limited to the structure of the polarizer 100 shown in FIG. 4 .
  • the release film layer 150 plays a protective role for the polarizer 100 to protect the adhesive layer 121 and prevent the adhesive layer 121 from being exposed to the natural environment to lose its viscosity.
  • the material of the release film layer 150 includes polyethylene terephthalate (Poly Ethylene Terephthalate, PET). It should be noted that when the polarizer 100 is attached to the display panel 200 , the release film layer 150 will be torn off. At this time, the polarized light after the release film layer 150 is torn off.
  • the structure of the sheet 100 is the same as that shown in FIG. 1 .
  • the functional layer 120 further includes a compensation layer 140 and a release film layer 150 , and the functional layer 120 includes two of the adhesive layers 121 and the protective layer 122; wherein, the two adhesive layers 121 are a first adhesive layer 1211 and a second adhesive layer 1212 respectively; the protective layer 122 is disposed on one side of the polarizing layer 110, and the protective layer 122 includes a hardened layer 1221 , the hardening treatment layer 1221 is disposed on the inner side of the protective layer 122 away from the polarizing layer 110 ; the first adhesive layer 1211 is disposed on a side of the polarizing layer 110 far away from the protective layer 122 .
  • the release film layer 150 is disposed on the side of the second adhesive layer 1212 away from the compensation layer 140 .
  • the light absorber 130 is added to at least one of the first adhesive layer 1211 , the second adhesive layer 1212 and the protective layer 122 to reduce the transmission of light of the preset wavelength Rate.
  • the addition position of the light absorber 130 in this embodiment is not limited to FIG. 5 , and the light absorber 130 can also be added to the first adhesive layer 1211 and the within the protective layer 122 .
  • the release film layer 150 will be torn off.
  • the structure of the polarizer 100 is the same as that shown in FIG. 2 .
  • the display device 10 further includes a cover plate 400 , and the cover plate 400 is separated from the display panel 200 by an optical adhesive layer 300 and the polarizer 100 .
  • One side is fixed, and at least one layer of the optical adhesive layer 300 and the functional layer 120 is added with a light absorber 130 to reduce the transmittance of light with a preset wavelength.
  • the cover plate 400 and the optical adhesive layer 300 may be disposed in the display device 10 described in any of the above embodiments, which is not limited to FIG. 6 .
  • the light absorber 130 is added in the optical adhesive layer 300 .
  • the addition position of the light absorber 130 in this embodiment is not the same as that shown in FIGS. 1 to 1 . 6 is the limit, and the light absorber 130 may also be added in the protective layer 122 and the adhesive layer 121 .
  • the light absorber 130 is added to at least one of the adhesive layer 121 , the protective layer 122 and the optical adhesive layer 300 , which specifically refers to the following seven situations: the adhesive layer 121 is added with the light absorber 130 .
  • the specific situation of adding the light absorber 130 to at least one layer may refer to this embodiment, and details are not repeated herein.
  • the positions of the display panel 200 and the cover plate 400 relative to the polarizer 100 can be interchanged, that is, the polarizer 100 is connected to the polarizer 100 through the second adhesive layer 1212
  • the cover plate 400 is fixed, and the polarizer 100 is fixed to the display panel 200 through the optical adhesive layer 300 , that is, the polarizer 100 only needs to be disposed on the display panel 200 and the cover plate 400 in between.
  • the light absorber 130 may be added to the optical adhesive layer 300 to meet the photocuring requirements of the optical adhesive layer 300 ;
  • the proportion of the light absorber 130 is less than or equal to the proportion of the light absorber 130 added in the functional layer 120 .
  • the display panel 200 is a conventional display panel in the field, preferably an OLED display panel;
  • the optical adhesive layer 300 is a transparent material.
  • the polarizer 100 is provided in the display device 10, which can effectively solve the problem that the luminescent material in the display panel 200 changes after being irradiated by the predetermined wavelength of light, resulting in a large color temperature of the display panel 200. In order to improve the viewing angle, color shift and light leakage in dark state, the display effect of the display panel is improved.
  • the material of the protective layer 122 includes triacetate cellulose (TAC), polymethyl methacrylate (Poly Methyl Meth Acrylate, PMMA, also called acrylic), polyethylene terephthalate (Poly At least one of Ethylene Terephthalate, PET) and Cyclic Olefin polymer (COP).
  • TAC Triacetate cellulose
  • PMMA Polymethyl methacrylate
  • PMMA Poly Methyl Meth Acrylate
  • COP Cyclic Olefin polymer
  • the material of the protective layer 122 can also be TAC (No Retardation TAC, NTR), which is more favorable for improving dark-state light leakage.
  • TAC No Retardation TAC, NTR
  • the above-mentioned materials all have high strength, heat resistance, and high permeability, which is beneficial to improve the overall performance of the polarizer 100 .
  • the material of the adhesive layer 121 includes pressure-sensitive adhesive, and those skilled in the art can understand that the adhesive layer 121 is
  • the display device 10 may be any product or component with a display function, such as a liquid crystal panel, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a liquid crystal panel, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.
  • Other essential components of the display device 10 should be understood by those of ordinary skill in the art, and will not be repeated here, nor should it be regarded as a limitation of the present application.
  • the polarizer 100 in the embodiment of the present application reduces the transmittance of the light of the preset wavelength by adding the light absorber 130 to the functional layer 120 .
  • the first adhesive layer 1211 , the second adhesive layer 1212 , the protective layer 122 and the optical adhesive layer 300 is added with the light absorber 130 to reduce the sensitivity to the wavelength range.
  • the transmittance of light between 200nm and 480nm is lower than 15%.
  • the application of the polarizer 100 in the display device 10 can effectively solve the problem of the transmittance of the preset wavelength.
  • the luminescent material in the display panel 200 changes, which causes the color temperature of the display panel 200 to drop significantly, improves the viewing angle, color shift and light leakage in the dark state, thereby improving the display effect of the display panel.
  • a display device 10 provided by the embodiments of the present application has been introduced in detail above, and the principles and implementations of the present application are described by using specific examples. The descriptions of the above embodiments are only used to help understand the method of the present application. and its core idea; at the same time, for those skilled in the art, according to the idea of the application, there will be changes in the specific implementation and application scope. In summary, the contents of this specification should not be construed as a limit.

Abstract

本申请公开了一种偏光片及显示装置，所述偏光片固定于所述显示面板的一侧，包括一偏光层以及与所述偏光层层叠设置的至少一功能层，所述功能层中添加有光吸收剂，以降低对预设波长的光的透过率。可以有效地解决经所述预设波长的光照射后，所述显示面板色温大幅度下降的问题，改善视角、色偏以及暗态漏光。

Description

偏光片及显示装置 技术领域
本申请涉及显示技术领域，特别是涉及一种偏光片及显示装置。
背景技术
现有显示装置中的偏光片的主要用于将入射的自然光转换为偏振光，然而，随着光学技术领域的快速发展，偏光片不仅局限于单一功能，目前市场对OLED显示屏有太阳光照的需求，OLED显示屏在太阳光照后均有色温降低的现象，若色温降低量过大，紫外光照后OLED显示屏点亮色温偏黄。
因此，针对目前存在的缺陷，急需进行改进。
技术问题
本申请的目的在于提供一种偏光片及显示装置，将所述偏光片应用于所述显示装置中，可以有效地解决经所述预设波长的光照射后，所述显示面板色温大幅度下降的问题。
技术解决方案
本申请还提供一种偏光片，所述偏光片包括一偏光层以及与所述偏光层层叠设置的至少一功能层，所述功能层中添加有光吸收剂，以降低对预设波长的光的透过率。
可选的，在本申请的一些实施例中，所述偏光片对所述预设波长的光的透过率低于15％。
可选的，在本申请的一些实施例中，所述预设波长的范围在200nm至480nm之间。
可选的，在本申请的一些实施例中，所述功能层包括：至少一胶层，所述胶层设置于所述偏光片的一侧，能够与一显示面板连接；至少一保护层，所述保护层设置于所述偏光片的另一侧。
可选的，在本申请的一些实施例中，所述功能层还包括一补偿层；所述功能层包括两个所述胶层，两个所述胶层分别为第一胶层和第二胶层；所述保护层设置于所述偏光层的一侧；所述第一胶层设置于所述偏光层远离所述保护层 的一侧；所述补偿层设置于所述第一胶层远离所述偏光层的一侧；所述第二胶层设置于所述补偿层远离所述第一胶层的一侧；其中，所述偏光片能够通过所述第二胶层与一显示面板固定。
可选的，在本申请的一些实施例中，所述保护层包括硬化处理层，所述硬化处理层位于所述保护层远离所述偏光层的一侧。
可选的，在本申请的一些实施例中，所述光吸收剂添加于所述硬化处理层中。
可选的，在本申请的一些实施例中，所述偏光片还包括离型膜层，所述离型膜层设置于所述胶层远离所述偏光层的一侧，且能够被撕除以暴露出所述胶层。
本申请还提供一种显示装置，包括显示面板以及偏光层，所述偏光片固定于所述显示面板的一侧，所述偏光片包括一偏光层以及与所述偏光层层叠设置的至少一功能层，所述功能层中添加有光吸收剂，以降低对预设波长的光的透过率。
可选的，在本申请的一些实施例中，所述偏光片对所述预设波长的光的透过率低于15％。
可选的，在本申请的一些实施例中，所述预设波长的范围在200nm至480nm之间。
可选的，在本申请的一些实施例中，所述功能层包括：至少一胶层，所述胶层设置于所述偏光片与所述显示面板之间；至少一保护层，所述保护层设置于所述偏光片远离所述显示面板的一侧。
可选的，在本申请的一些实施例中，所述功能层还包括一补偿层；所述功能层包括两个所述胶层，两个所述胶层分别为第一胶层和第二胶层；所述保护层设置于所述偏光层的一侧；所述第一胶层设置于所述偏光层远离所述保护层的一侧；所述补偿层设置于所述第一胶层远离所述偏光层的一侧；所述第二胶层设置于所述补偿层远离所述第一胶层的一侧；其中，所述偏光片通过所述第二胶层与所述显示面板固定。
可选的，在本申请的一些实施例中，所述保护层包括硬化处理层，所述硬化处理层位于所述保护层远离所述偏光层的一侧。
可选的，在本申请的一些实施例中，所述光吸收剂添加于所述硬化处理层中。
可选的，在本申请的一些实施例中，所述偏光层的材料包括聚乙烯醇。
可选的，在本申请的一些实施例中，所述保护层的材料包括三醋酸纤维素、聚甲基丙烯酸甲酯、聚对苯二甲酸乙二酯、环烯烃聚物中的至少一种。
可选的，在本申请的一些实施例中，所述胶层的材料包括压敏胶。
可选的，在本申请的一些实施例中，所述显示装置还包括一盖板，所述盖板通过一光学胶层与所述偏光片远离所述显示面板的一侧固定，所述光学胶层与所述功能层中至少一层添加有光吸收剂，以降低对预设波长的光的透过率。
可选的，在本申请的一些实施例中，所述光学胶层中添加的所述光吸收剂的比例小于或等于所述功能层中添加的所述光吸收剂的比例。
有益效果
相较于现有技术，本申请实施例中所述偏光片通过在所述功能层内添加光吸收剂，从而降低对所述预设波长的光的透过率。具体地，所述第一胶层、所述第二胶层、所述保护层以及所述光学胶层中的至少一层添加有所述光吸收剂，以降低对波长范围在200nm至480nm之间的光的透过率，使所述透过率低于15％，将所述偏光片应用于所述显示装置中，可以有效地解决经所述预设波长的光照射后，所述显示面板中的发光材料发生变化，导致所述显示面板大幅度色温下降的问题，改善视角、色偏以及暗态漏光，从而提高所述显示面板的显示效果。
附图说明
为了更清楚地说明本申请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申请的一些实施例，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是本申请实施例中所述显示装置的结构一示意图；
图2是本申请实施例中所述显示装置的结构二示意图；
图3是本申请实施例中所述显示装置的结构三示意图；
图4是本申请实施例中所述偏光片的一种结构示意图；
图5是本申请实施例中所述偏光片的另一种结构示意图
图6是本申请实施例中所述显示装置的结构四示意图。
主要附图标记说明：
Figure PCTCN2021094097-appb-000001
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”、“下”、“左”和“右”可以是装置实际使用或工作状态的方向，也可以是参考附图中的图面方向，还可以是指相对的两个方向；而“内”和“外”则是针对装置的轮廓而言的。
具体地，请参阅图1，本申请提供一种显示装置10，包括显示面板200以及偏光片100，所述偏光片100固定于所述显示面板200的一侧，所述偏光片100包括一偏光层110以及与所述偏光层110层叠设置的至少一功能层120，所述功能层120中添加有光吸收剂130，以降低对预设波长的光的透过率。其 中，所述功能层120包括至少一胶层121以及至少一保护层122，所述胶层121设置于所述偏光片100与所述显示面板200之间；所述保护层122设置于所述偏光片100远离所述显示面板200的一侧。本申请中所述光吸收剂130均匀分布于所述功能层120，可以保证所述偏光片100对所述预设波长的光的均匀吸收，提升所述偏光片100的透光均匀性。
本申请中所述胶层121远离所述偏光层110的一侧用于将所述偏光片100与一贴合基础贴合，所述贴合基础可以是任意显示面板或显示盖板等，本实施例不作限定。所述偏光层110为所述偏光片100是实现偏光功能的核心部分，所述偏光层110的材料包括聚乙烯醇(Poly Vinyl Alcohol，PVA)，所述偏光层110的厚度在10um至30um之间，例如：15um、20um、25um等。由于所述偏光层强度较低，质脆易破，同时具有较强的亲水性，在所述偏光层一侧设置所述保护层122，可以用于支撑和保护所述偏光层110，并且有效地防止所述偏光层110受外界环境的影响导致地收缩变形、吸水褪色等问题。在本实施例中，还可以对所述保护层122的表面进行抗反射处理以及抗眩光处理，以满足多元化的需求。本领域技术人员可以理解的是，所述胶层121以及所述保护层122中的至少一层添加有光吸收剂130，以降低对所述预设波长的光的透过率，主要是通过所述光吸收剂130吸收所述预设波长的光，从而降低所述预设波长的光对所述偏光片100中所述偏光层110的破坏能力，增强所述偏光层110的稳定性。
本申请中所述预设波长的范围在200nm至480nm之间，具体地，所述预设波长的光包括：波长范围在200nm至380nm之间的紫外光以及波长范围在380nm至480nm之间的可见光，例如：波长为340nm的紫外光、波长为400nm的可见光、波长为420nm的可见光等。所述光吸收剂130通过对波长范围在200nm至380nm之间的紫外光以及波长范围在380nm至480nm之间的可见光的吸收，降低了波长范围在200nm至380nm之间的紫外光以及波长在380nm至480nm之间的可见光的透过率，进而提升所述偏光片100的耐紫外光吸收能力。所述光吸收剂130的设置，可以使所述偏光片100对所述预设波长的光的透过率低于15％，即对波长范围在200nm至380nm之间的紫外光以及波长范围在380nm至480nm之间的可见光的透过率低于15％，优选地，所述偏光 片100对所述预设波长的光的透过率低于12％。本领域技术人员可以理解的是，本实施例中所述预设波长的具体范围以及所述偏光片100对所述预设波长的光的透过率的范围同样适用于本申请中任一实施例，本文不再赘述。
请参阅图2，在本申请一实施例中，所述功能层120还包括一补偿层140，所述功能层120包括两个所述胶层121，两个所述胶层121分别为第一胶层1211和第二胶层1212；所述第一胶层1211设置于所述偏光层110的一侧；所述补偿层140设置于所述第一胶层1211远离所述偏光层110的一侧；所述第二胶层1212设置于所述补偿层140远离所述第一胶层1211的一侧；所述保护层122设置于所述偏光层110的另一侧。其中，所述第一胶层1211、所述第二胶层1212以及所述保护层122中的至少一层添加所述有光吸收剂130，以降低对所述预设波长的光的透过率。所述第二胶层1212远离所述补偿层140的一侧用于将所述偏光片100与一贴合基础贴合，所述贴合基础可以是任意显示面板或显示盖板等，本实施例不作限定。所述补偿层140具有偏振补充的作用，一定程度上补偿或修正不同视角下的相位差，从而提高透过所述偏光片100的显示画面品质。所述补偿层140还可以改善视角、色偏以及暗态漏光等特性。本领域技术人员可以理解的是，本实施例所述光吸收剂130的添加位置并不以图2为限，还可以将所述光吸收剂130添加在所述第一胶层1211以及所述保护层122内。优选地，所述补偿层140还集成有偏振性增亮膜，可以有效地提高所述偏光片100对除了所述预设波长以外的光的透过率。
请参阅图3，本申请中所述保护层122包括硬化处理层1221，所述硬化处理层1221位于所述保护层122远离所述偏光层110的一侧，可以理解的是，所述硬化处理层1221属于所述保护层122的一部分，即存在于所述保护层122的内部，并且远离所述偏光层110设置。优选地，当所述保护层122中添加有所述光吸收剂130时，所述光吸收剂130添加于所述硬化处理层1221中。上述实施例中的所述保护层122中均可以设置所述硬化处理层1221，具体地，所述保护层122中可以设置所述硬化处理层1221，也可以不设置，本申请并不作限定。本领域技术人员可以理解的是，所述光吸收剂130的添加位置并不以图3为限，并且所述硬化处理层1221可以设置在本申请任一实施例所述的偏光片100的所述保护层122中，并不以图3所述偏光片100的结构为限。所 述硬化处理层1221可以增强所述偏光片100的硬度、耐磨损和抗侵蚀能力，设有所述硬化处理层1221的所述偏光片100的硬度可达到3H以上。
请参阅图4，所述偏光片100还包括离型膜层150，所述离型膜层150设置于所述胶层121远离所述偏光层110的一侧。具体地，所述离型膜层150设置于所述第一胶层1211或所述第二胶层1212远离所述偏光层110的一侧，并不以图4为限。同样地，所述离型膜层150可以设置在本申请任一实施例所述的偏光片100中，并不以图4所述偏光片100的结构为限。所述离型膜层150对所述偏光片100起着保护作用，用来保护所述胶层121，防止所述胶层121暴露在自然环境中从而失去黏性。所述离型膜层150的材料包括聚对苯二甲酸乙二酯(Poly Ethylene Terephthalate，PET)。需要注意的是，当所述偏光片100贴附于所述显示面板200时，所述离型膜层150会被撕去，此时，撕去所述离型膜层150后的所述偏光片100的结构与图1所示结构相同。
请参阅图5，在本申请一实施例中，所述功能层120还包括一补偿层140以及一离型膜层150，所述功能层120包括两个所述胶层121以及所述保护层122；其中，两个所述胶层121分别为第一胶层1211和第二胶层1212；所述保护层122设置于所述偏光层110的一侧，所述保护层122包括硬化处理层1221，所述硬化处理层1221设置于所述保护层122的内部的远离所述偏光层110的一侧；所述第一胶层1211设置于所述偏光层110远离所述保护层122的一侧；所述补偿层140设置于所述第一胶层1211远离所述偏光层110的一侧；所述第二胶层1212设置于所述补偿层140远离所述第一胶层1211的一侧，所述离型膜层150设置于所述第二胶层1212远离所述补偿层140的一侧。其中，所述第一胶层1211、所述第二胶层1212以及所述保护层122中的至少一层添加所述有光吸收剂130，以降低对所述预设波长的光的透过率。本领域技术人员可以理解的是，本实施例所述光吸收剂130的添加位置并不以图5为限，还可以将所述光吸收剂130添加在所述第一胶层1211以及所述保护层122内。如图5所示，当所述偏光片100贴附于所述显示面板200时，所述离型膜层150会被撕去，此时，撕去所述离型膜层150后的所述偏光片100的结构与图2所示结构相同。
请参阅图6，在本申请的一些实施例中，所述显示装置10还包括一盖板 400，所述盖板400通过一光学胶层300与所述偏光片100远离所述显示面板200的一侧固定，所述光学胶层300与所述功能层120中至少一层添加有光吸收剂130，以降低对预设波长的光的透过率。可以理解的是，所述盖板400与所述光学胶层300可以设置于上述任一实施例所述的显示装置10中，并不以图6为限。如图6所示，所述光吸收剂130添加在所述光学胶层300内，本领域技术人员可以理解的是，本实施例所述光吸收剂130的添加位置并不以图1至图6为限，还可以将所述光吸收剂130添加在所述保护层122以及所述胶层121内。其中，所述胶层121、所述保护层122以及所述光学胶层300中的至少一层添加有光吸收剂130，具体指的是以下七种情况：所述胶层121添加有所述光吸收剂130；所述保护层122添加有所述光吸收剂130；所述光学胶层300添加有所述光吸收剂130；所述胶层121以及所述保护层122中均添加有所述光吸收剂130；所述胶层121以及所述光学胶层300中均添加有所述光吸收剂130；所述保护层122以及所述光学胶层300中均添加有所述光吸收剂130；所述胶层121、所述保护层122以及所述光学胶层300中同时添加有光吸收剂130。本申请中其他实施例中至少一层添加有所述光吸收剂130的具体情况参见本实施例即可，本文不再赘述。
在本申请一实施例中，所述显示面板200与所述盖板400相对于所述偏光片100的位置可以互换，也就是说，所述偏光片100通过所述第二胶层1212与所述盖板400固定，所述偏光片100通过所述光学胶层300与所述显示面板200固定，也就是说，所述偏光片100只要设置于所述显示面板200与所述盖板400之间即可。
在本申请一实施例中，在所述光学胶层300中添加所述光吸收剂130满足所述光学胶层300的光固化要求即可；优选地，所述光学胶层300中添加的所述光吸收剂130的比例小于或等于所述功能层120中添加的所述光吸收剂130的比例。所述显示面板200为本领域一常规的显示面板，优选为OLED显示面板；所述光学胶层300为透明材料。所述显示装置10中设置有所述偏光片100，可以有效地解决经所述预设波长的光照射后，所述显示面板200中的发光材料发生变化，导致所述显示面板200大幅度色温下降的问题，改善视角、色偏以及暗态漏光，从而提高所述显示面板的显示效果。
在本申请中，所述保护层122的材料包括三醋酸纤维素(TAC)、聚甲基丙烯酸甲酯(Poly Methyl Meth Acrylate，PMMA，也称亚克力)、聚对苯二甲酸乙二酯(Poly Ethylene Terephthalate，PET)、环烯烃聚物(Cyclic Olefin polymer，COP)中的至少一种。所述保护层122的材料还可以是无光学延迟的TAC(No Retardation TAC，NTR)，这种材料对改善暗态漏光更有利。上述材料均具有较高的强度、抗热敏性，同时透过性较高，有利于提高所述偏光片100的综合性能。所述胶层121的材料包括压敏胶，本领域技术人员可以理解的是，所述胶层121为透明材料。
此外，所述显示装置10可以为液晶面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。对于所述显示装置10的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本申请的限制。
综上，相较于现有技术，本申请实施例中所述偏光片100通过在所述功能层120中添加光吸收剂130，从而降低对所述预设波长的光的透过率。具体地，所述第一胶层1211、所述第二胶层1212、所述保护层122以及所述光学胶层300中的至少一层添加有所述光吸收剂130，以降低对波长范围在200nm至480nm之间的光的透过率，使所述透过率低于15％，将所述偏光片100应用于所述显示装置10中，可以有效地解决经所述预设波长的光照射后，所述显示面板200中的发光材料发生变化，导致所述显示面板200大幅度色温下降的问题，改善视角、色偏以及暗态漏光，从而提高所述显示面板的显示效果。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种显示装置10进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种偏光片，其中，所述偏光片包括一偏光层以及与所述偏光层层叠设置的至少一功能层，所述功能层中添加有光吸收剂，以降低对预设波长的光的透过率。
  2. 如权利要求1所述的偏光片，其中，所述偏光片对所述预设波长的光的透过率低于15％。
  3. 如权利要求2所述的偏光片，其中，所述预设波长的范围在200nm至480nm之间。
  4. 如权利要求1所述的偏光片，其中，所述功能层包括：
    至少一胶层，所述胶层设置于所述偏光片的一侧，能够与一显示面板连接；
    至少一保护层，所述保护层设置于所述偏光片的另一侧。
  5. 如权利要求4所述的偏光片，其中，所述功能层还包括一补偿层；所述功能层包括两个所述胶层，两个所述胶层分别为第一胶层和第二胶层；
    所述保护层设置于所述偏光层的一侧；
    所述第一胶层设置于所述偏光层远离所述保护层的一侧；
    所述补偿层设置于所述第一胶层远离所述偏光层的一侧；
    所述第二胶层设置于所述补偿层远离所述第一胶层的一侧；
    其中，所述偏光片能够通过所述第二胶层与一显示面板固定。
  6. 如权利要求5所述的偏光片，其中，所述保护层包括硬化处理层，所述硬化处理层位于所述保护层远离所述偏光层的一侧。
  7. 如权利要求6所述的偏光片，其中，所述光吸收剂添加于所述硬化处理层中。
  8. 如权利要求4所述的偏光片，其中，所述偏光片还包括离型膜层，所述离型膜层设置于所述胶层远离所述偏光层的一侧，且能够被撕除以暴露出所述胶层。
  9. 一种显示装置，包括显示面板以及偏光片，其中，所述偏光片固定于所述显示面板的一侧，所述偏光片包括一偏光层以及与所述偏光层层叠设置的至少一功能层，所述功能层中添加有光吸收剂，以降低对预设波长的光的透过率。
  10. 如权利要求9所述的显示装置，其中，所述偏光片对所述预设波长的光的透过率低于15％。
  11. 如权利要求10所述的显示装置，其中，所述预设波长的范围在200nm至480nm之间。
  12. 如权利要求9所述的显示装置，其中，所述功能层包括：
    至少一胶层，所述胶层设置于所述偏光片与所述显示面板之间；
    至少一保护层，所述保护层设置于所述偏光片远离所述显示面板的一侧。
  13. 如权利要求12所述的显示装置，其中，所述功能层还包括一补偿层；所述功能层包括两个所述胶层，两个所述胶层分别为第一胶层和第二胶层；
    所述保护层设置于所述偏光层的一侧；
    所述第一胶层设置于所述偏光层远离所述保护层的一侧；
    所述补偿层设置于所述第一胶层远离所述偏光层的一侧；
    所述第二胶层设置于所述补偿层远离所述第一胶层的一侧；
    其中，所述偏光片通过所述第二胶层与所述显示面板固定。
  14. 如权利要求13所述的显示装置，其中，所述保护层包括硬化处理层，所述硬化处理层位于所述保护层远离所述偏光层的一侧。
  15. 如权利要求14所述的显示装置，其中，所述光吸收剂添加于所述硬化处理层中。
  16. 如权利要求12所述的显示装置，其中，所述偏光层的材料包括聚乙烯醇。
  17. 如权利要求12所述的显示装置，其中，所述保护层的材料包括三醋酸纤维素、聚甲基丙烯酸甲酯、聚对苯二甲酸乙二酯、环烯烃聚物中的至少一种。
  18. 如权利要求12所述的显示装置，其中，所述胶层的材料包括压敏胶。
  19. 如权利要求9所述的显示装置，其中，所述显示装置还包括：
    一盖板，所述盖板通过一光学胶层与所述偏光片远离所述显示面板的一侧固定，所述光学胶层与所述功能层中至少一层添加有光吸收剂，以降低对预设波长的光的透过率。
  20. 如权利要求19所述的显示装置，其中，所述光学胶层中添加的所述 光吸收剂的比例小于或等于所述功能层中添加的所述光吸收剂的比例。
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