CN113534319B - Polarizing plate and display panel - Google Patents
Polarizing plate and display panel Download PDFInfo
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- CN113534319B CN113534319B CN202110741719.0A CN202110741719A CN113534319B CN 113534319 B CN113534319 B CN 113534319B CN 202110741719 A CN202110741719 A CN 202110741719A CN 113534319 B CN113534319 B CN 113534319B
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- G—PHYSICS
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- 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
-
- 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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
-
- 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
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- 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
-
- 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
- H10K50/87—Arrangements for heating or cooling
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
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- Electroluminescent Light Sources (AREA)
Abstract
The application discloses polarizing plate and display panel, polarizing plate includes: polarizing layer, first protective layer and second protective layer, polarizing layer is used for carrying out the polarizing treatment back outgoing to incident light, first protective layer and second protective layer set up respectively the both sides of polarizing layer are used for protecting polarizing layer, first protective layer is at least partly made of phase change energy storage material, phase change energy storage material absorbs heat when the temperature is greater than first default temperature, releases heat when the temperature is less than second default temperature. Through the scheme, the display panel is prevented from being influenced by the ambient temperature.
Description
Technical Field
The application relates to the technical field of display, in particular to a polarizing plate and a display panel.
Background
At present, display technology is continuously developed, display panels with various sizes are widely used in life of people, and liquid crystal display panels are used as display panels of the current mainstream, so that the cost is low, the display effect is excellent, and the liquid crystal display panels are loved by consumers with low radiation. However, in practical use, the display panel is used in various high and low temperature environments, including transportation, and extreme weather exists in both a liquid crystal (Thin film transistor liquid crystal display) display panel and an organic light-Emitting Diode (OLED) display panel. Under such conditions, the display panel is prone to failures such as failure abnormality at high temperature and low-temperature starting abnormality, and normal use of the display panel is affected.
Therefore, how to ensure that the display panel is not affected by the ambient temperature is a technical problem that needs to be solved in the art.
Disclosure of Invention
The purpose of the application is to provide a polarizing plate and a display panel, so as to ensure that the display panel is not influenced by ambient temperature.
The application discloses a polarizing plate, include: the polarizing layer is used for emitting incident light after polarizing treatment, the first protective layer and the second protective layer are respectively arranged on the light incident surface and the light emitting surface of the polarizing layer and used for protecting the polarizing layer, at least part of the first protective layer is made of a phase-change energy storage material, the phase-change energy storage material absorbs heat when the temperature is higher than a first preset temperature, and releases heat when the temperature is lower than a second preset temperature.
Optionally, the first protection layer is made by host material and phase change energy storage material, the first protection layer includes a plurality of first recesses, first recess sets up first protection layer is close to one side of polarisation layer, be provided with in the first recess phase change energy storage material, first protection layer with the polarisation layer pastes sealedly mutually first recess.
Optionally, the phase change energy storage material comprises a solid-solid phase change energy storage material or a solid-liquid phase change energy storage material, the solid-solid phase change energy storage material comprising: one or more of graphenes, inorganic salts, polyols and cross-linked high-density polyethylenes; the solid-liquid phase change energy storage material comprises: one or more of paraffin, polyethylene glycol, polyvinyl alcohol and polyurethane.
Optionally, the second protection layer is made of a main material and a phase-change energy storage material, the phase-change energy storage material absorbs heat when the temperature is higher than a first preset temperature, and releases heat when the temperature is lower than a second preset temperature.
Optionally, the second protection layer includes a plurality of second grooves, the second grooves are disposed on a side of the second protection layer, which is close to the polarizing layer, the phase change energy storage material is disposed in the second grooves, and the second protection layer and the polarizing layer are adhered to seal the second grooves; the second grooves are arranged in one-to-one correspondence with the first grooves.
Optionally, the polarizing direction of the polarizing layer is consistent with the length direction of the first groove.
Optionally, the polarizing plate is used for being attached to a display panel, and the first protective layer or the second protective layer is attached to the display panel; the display panel further comprises a shading layer, wherein the shading layer is used for shading light; the plurality of first grooves are arranged corresponding to the area of the shading layer.
Optionally, the display panel includes a plurality of pixel active switches, where the pixel active switches are disposed corresponding to the area of the light shielding layer; the first grooves are arranged in a matrix mode, and the first grooves are arranged in one-to-one correspondence with the pixel active switches.
Optionally, the first protective layer is formed only from the phase change energy storage material; wherein the phase change energy storage material comprises a solid-solid phase change energy storage material.
The application also discloses a display panel, include: the display device comprises a display substrate and a polarizing plate, wherein the polarizing plate is arranged on one side of the display substrate, and the polarizing plate is the polarizing plate.
The protective layer in the composite polarizing plate uses the main material and the phase-change energy storage material, the main material is the general material of the protective layer, the phase-change energy storage material can realize spontaneous heat generation under the condition of lower external environment temperature, the temperature of the polarizing plate is improved, and meanwhile, under the condition of higher external temperature, the temperature of the polarizing plate is reduced by absorbing the heat through phase change. The polarizing plate is in direct contact with the display panel and is arranged on the outer side of the display panel, so that abnormal display caused by rising or falling of the ambient temperature can be avoided, when the ambient temperature is high, the phase-change energy storage material in the polarizing plate absorbs the heat of the display panel, and when the ambient temperature is low, the phase-change energy storage material in the polarizing plate releases the heat, and therefore the display can be always kept in a safe temperature range capable of being normally used; and the reliability of the product is improved. And the process of absorbing or releasing heat by the phase change energy storage material is reversible, and the reliability of the product can be continuously ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:
fig. 1 is a schematic view of a display panel according to a first embodiment of the present application;
fig. 2 is a schematic view of a polarizing plate according to a first embodiment of the present application;
fig. 3 is a schematic view of a polarizing plate according to a second embodiment of the present application;
fig. 4 is a schematic top view of a first polarizing plate according to a second embodiment of the present application;
fig. 5 is a schematic top view of a second polarizing plate according to a second embodiment of the present application;
fig. 6 is a schematic top view of a third polarizing plate according to a second embodiment of the present application;
fig. 7 is a schematic view of a polarizing plate according to a third embodiment of the present application;
fig. 8 is a schematic view of a display panel according to a fourth embodiment of the present application;
fig. 9 is a schematic top view of a light shielding layer according to a fourth embodiment of the present application.
100 parts of a display panel; 110. a first substrate; 120. a second substrate; 121. a light shielding layer; 130. a lower polarizing plate; 140. an upper polarizing plate; 150 a liquid crystal layer; 200. a polarizing plate; 201. a phase change energy storage material; 210. a first protective layer; 211. a first groove; 220. a polarizing layer; 230. a second protective layer; 231. and a second groove.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.
In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.
Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The present application is described in detail below with reference to the attached drawings and alternative embodiments.
As shown in fig. 1, as a first embodiment of the present application, a display panel 100 is shown, including a display substrate and a polarizing plate, where the display substrate may be an OLED display substrate or a TFT-LCD display substrate, and for the TFT-LCD display substrate, the display panel 100 includes: a first substrate 110, a second substrate 120, a liquid crystal layer 150, an upper polarizing plate 140, and a lower polarizing plate 130; the second substrate 120 is arranged opposite to the first substrate 110; the liquid crystal layer 150 is disposed between the first substrate 110 and the second substrate 120; the upper polarizing plate 140 is disposed at a side of the first substrate 110 away from the second substrate 120, and the lower polarizing plate 130 is disposed at a side of the second substrate 120 away from the first substrate 110; for the OLED display substrate, the polaroid is mainly used for blocking external light interference, delaying visual fatigue and improving picture contrast, and can be particularly used as a circular polaroid.
As shown in fig. 2, the polarizing plate 200 of the first embodiment of the present application, the upper polarizing plate 140, the lower polarizing plate 130, and the circular polarizer in the OLED display substrate may all use the composite polarizing plate 200 of fig. 2, and the polarizing plate 200 includes: the polarizing layer 220, the first protective layer 210 and the second protective layer 230, wherein the polarizing layer 220 is used for emitting incident light after polarizing treatment, the first protective layer 210 and the second protective layer 230 are respectively arranged on the light incident surface and the light emitting surface of the polarizing layer 220 and are used for protecting the polarizing layer 220, and the first protective layer 210 is at least partially made of a phase-change energy storage material, namely, the first protective layer is made of a phase-change energy storage material and a main body material. The phase change energy storage material absorbs heat when the temperature is higher than a first preset temperature, and releases heat when the temperature is lower than a second preset temperature.
The composite polarizing plate 200 may be bonded to only one side of the display panel 100, for example, the upper polarizing plate 140 may be bonded to one side of the light exit surface, or the lower polarizing plate 130 may be bonded to only the light entrance surface of the display panel 100, or both sides of the display panel 100.
The polarizing layer in the composite polarizing plate 200 of the present application has a polarizing mechanism, and a PVA (Polyvinyl alcohol) material is generally used. The protective layer uses a main material and a phase-change energy storage material, the main material is TAC (Triacetyl Cellulose, cellulose triacetate film material), the protective layer has a supporting and protecting function, and can be called a supporting layer, the cellulose triacetate film material of the protective layer can also be combined with the phase-change energy storage material to form the composite polarizing plate, and the main material of the protective layer uses other materials to be combined with the phase-change energy storage material, so that the protective layer is also considered as a deformation of the application. The phase change energy storage material can realize spontaneous heat generation under the condition of low external environment temperature, so as to improve the temperature of the polarizing plate 200, and can absorb heat through phase change under the condition of high external environment temperature, so as to reduce the temperature of the polarizing plate 200. The polarizing plate 200 is in direct contact with the display panel 100 and is arranged at the outer side of the display panel 100, so that abnormal display caused by rising or falling of the ambient temperature can be avoided, when the ambient temperature is higher, the phase-change energy storage material in the polarizing plate 200 absorbs the heat of the display panel 100, and when the ambient temperature is lower, the phase-change energy storage material in the polarizing plate 200 releases the heat, so that the display can be always kept in a safe temperature range capable of being normally used; and the reliability of the product is improved. And the process of absorbing or releasing heat by the phase change energy storage material is reversible, and the reliability of the product can be continuously ensured.
Specifically, the first protection layer 210 is made of only the phase change energy storage material, forming the first protection layer 210; wherein the phase change energy storage material comprises a solid-solid phase change energy storage material. The solid-solid phase change energy storage material refers to a material form of solid before and after a phase change process, and comprises the following components: one or more of graphenes, inorganic salts, polyols and cross-linked high-density polyethylenes; for example: crosslinked high density polyethylene is accompanied by rearrangement of the main chain or branch chain of the polymer during endothermic and exothermic processes. For example: graphene materials also accompany changes in internal two-dimensional planar molecular structures, or three-dimensional structures, as well as changes in the angles of the carbon chains within the molecules. The above can be simply referred to as microscopic molecular internal structural changes, but the macroscopic morphology is not affected. The materials listed above all belong to low-temperature phase-change energy storage materials, and the phase-change temperature is between 20 and 100 degrees, namely the first preset temperature is 100 degrees, and the second preset temperature is 20 degrees. The present invention is not limited herein, and because the actual use environments are different, and the conditions of high temperature are different, the first preset temperature is set to 100 degrees or 80 degrees, and the first preset temperature and the second preset temperature can be selected between 20 degrees and 100 degrees, and the actual phase change temperature can be adjusted by adjusting the proportion of various phase change energy storage materials, which is not described in detail herein.
It is important that the transmittance of the polarizing plate 200 should be considered during the mixing, and the transmittance of the monomer of the polarizing plate 200 is generally 30% -60%, so that it is also considered that the main material of the polarizing plate 200 and the phase change energy storage material are mixed to form the protective layer, the physical mixing does not change the original characteristics of the phase change energy storage material and the main material, and the physical mixing is mainly suitable for the solid-solid phase change energy storage material.
As a second embodiment of the present application, as shown in fig. 3 in combination with fig. 1, a schematic cross-sectional view of a polarizing plate 200 of a display panel 100 is disclosed, the display panel 100 includes: a first substrate 110, a second substrate 120, a liquid crystal layer 150, an upper polarizing plate 140, and a lower polarizing plate 130; the second substrate 120 is arranged opposite to the first substrate 110; the liquid crystal layer 150 is disposed between the first substrate 110 and the second substrate 120; the upper polarizing plate 140 is disposed at a side of the first substrate 110 away from the second substrate 120, and the lower polarizing plate 130 is disposed at a side of the second substrate 120 away from the first substrate 110; wherein, a composite polarizing plate 200 may be used for both the upper polarizing plate 140 and the lower polarizing plate 130, and the polarizing plate 200 includes: the polarizing layer 220, the first protective layer 210 and the second protective layer 230, the polarizing layer 220 is used for emitting the incident light after polarizing treatment, the first protective layer 210 and the second protective layer 230 are respectively arranged at two sides of the polarizing layer 220 and are used for protecting the polarizing layer 220,
the first protection layer is made of a main material and a phase-change energy storage material, the first protection layer 210 comprises a plurality of first grooves 211, the first grooves 211 are formed in one side, close to the polarizing layer 220, of the first protection layer 210, the phase-change energy storage material 201 is arranged in the first grooves 211, and the first grooves 211 are sealed by the first protection layer 210 and the polarizing layer 220.
As shown in fig. 4, which is a schematic top view of the first polarizing plate 200 according to the second embodiment, the bottom surface of the first groove 211 may be rectangular, circular, etc., and the arrangement of the plurality of first grooves 211 may be an array arrangement, and when the polarizing plate 200 is small in size, for example, when used as a mobile phone screen, the length of the first protective layer 210 is 14.1cm and the width is 9.4cm, and the area of the plurality of first grooves 211 occupies 20% -80% of the area of the first protective layer 210. The specific arrangement can be as follows: the plurality of first grooves 211 are arranged in a single row in the width direction of the first protective layer 210. For large television screens, 75 inches is taken as an example: the length of the first protective layer 210 is 152.4cm. The width of the first protective layer 210 is 114.3cm, and the area of the plurality of first grooves 211 occupies 20% to 80% of the area of the first protective layer 210. Considering the single-column arrangement, the bottom surface of the first groove 211 is easy to reach a length of more than 100cm, and for the solid-liquid phase-change energy storage material, in practical use, the polarizing plate 200 is vertically placed, if the length direction of the first groove 211 is parallel to the gravity direction, when the solid-liquid phase-change energy storage material is selected, the liquid phase-change energy storage material may be stacked under the influence of gravity when the phase-change energy storage material is in a liquid state. For this, there are two schemes:
first, as shown in fig. 5, which is a schematic top view of the second polarizing plate 200 based on the modification of fig. 4, it is possible to prevent accumulation of the phase change energy storage material of the liquid by setting the length direction of the first groove 211 to be perpendicular to the gravitational direction when the display panel 100 is in use and setting the width of the first groove 211 to be the width of the pixel level.
Secondly, the lengths of the plurality of first grooves 211 may be reduced, so that a plurality of rows of first grooves 211 are provided, as shown in fig. 6, which is a schematic top view of the third polarizing plate 200 modified based on fig. 4, at least two rows of first grooves 211 arranged in a row are provided, however, for example, three rows and four rows may be provided, and the problem that the liquid phase change energy storage material may be stacked is reduced as the case may be.
Specifically, the phase change energy storage material comprises a solid-solid phase change energy storage material or a solid-liquid phase change energy storage material, the solid-solid phase change energy storage material comprising: one or more of graphenes, inorganic salts, polyols and cross-linked high-density polyethylenes; the solid-liquid phase change energy storage material comprises: one or more of paraffin, polyethylene glycol, polyvinyl alcohol and polyurethane.
Solid-liquid phase change energy storage materials can be interpreted as being solid and liquid, respectively, before and after phase change, and during phase change a change in morphology occurs, such as water, which solidifies to ice below 0 degrees and water, such as paraffin, which melts to water above 0 degrees, and there is a change in fixation and liquid. The phase change is a reversible process and is carried out along with the change of the external temperature, and the material can only act when the external temperature changes, so that the durability of the material does not influence the normal service life of the display screen; regarding the solid-liquid phase change energy storage material, the first protection layer 210 is provided with a wrapped structure of an inner cavity, so that the phase change energy storage material is protected in a sealing manner, and the leakage problem can be prevented. For solid-liquid phase change energy storage materials, there is a change in volume, but because a wrap-around structure is formed, the overall structural volume of the first protective layer 210 is not affected. Of course, for a wrap-around structure, the inner cavity of the first protective layer 210 may also hold a solid-solid phase change energy storage material, but there are differences in the manufacturing process.
As fig. 7 is a further improvement based on fig. 3, showing another polarizing plate 200, as a third embodiment of the present application, the polarizing plate 200 includes a first protective layer 210, a polarizing layer 220, and a second protective layer 230, and of course, the second protective layer 230 includes a body material and a phase change energy storage material, which absorbs heat when the temperature is higher than a first preset temperature and releases heat when the temperature is lower than a second preset temperature, except that the first protective layer 210 adopts the first protective layer 210 of the first embodiment or the second embodiment described above.
The composite protective layers are arranged on both sides of the polarizing layer 220, so that the protective layers on both sides of the polarizing layer 220 form double-layer protection, the polarizing layer 220 is a primary film, the primary film has a tendency to retract transversely or longitudinally after film formation, and the primary film has a tendency that the change of the ambient temperature influences the retraction to a certain extent, so that the protective layers are arranged on both sides of the polarizing layer 220, the change of the ambient temperature is ensured, and the influence on the polarizing layer 220 is small. Of course, a more important factor in providing a double protective layer is that the inside of the display panel 100 is doubly protected by, for example, liquid crystal, an important component of the pixel active switch, for example, the liquid crystal is a liquid, and the volume of the liquid crystal is changed by the change of the ambient temperature. When the liquid crystal volume increases due to high temperature, gravity Mura is liable to occur in the liquid crystal cell, and when the liquid crystal volume shrinks due to low temperature, vacuum bubbles (bubbles) are liable to occur in the liquid crystal cell. The pixel active switch is also greatly affected by temperature, for example, the carrier mobility at low temperature or high temperature is different, so that abnormal display is caused, so that the first protection layer 210 and the second protection layer 230 cover the pixel active switch entirely, and the heat generated by the pixel active switch absorbs or releases heat for the pixel active switch.
As shown in fig. 7, in combination with the first protection layer 210 of the second embodiment, the second protection layer 230 of the polarizing plate 200 includes a plurality of second grooves 231, the second grooves 231 are disposed on a side of the second protection layer 230 near the polarizing layer 220, the phase-change energy storage material 201 is disposed in the second grooves 231, and the second protection layer 230 seals the second grooves 231 in a manner of adhering to the polarizing layer 220; the second grooves 231 are disposed in one-to-one correspondence with the first grooves 211. It should be noted that, the first grooves 211 and the second grooves 231 may be staggered without considering the influence of other factors.
The first groove 211 and the second groove 231 are sealed by being attached to the polarizing layer 220, and of course, a sealing layer may be further provided, the sealing layer may be made of a main material of the protecting layer, the sealing layer is attached to the first groove 211 or the second groove 231 to form a seal, and then an adhesive is coated on the sealing layer, so that the polarizing layer 220, the sealing layer, the first protecting layer 210 and the second protecting layer 230 are completely adhered together.
Specifically, the polarizing direction of the polarizing layer 220 coincides with the length direction of the first groove 211. Before the film formation, the polarizing layer is stretched in the polarizing direction. However, since the polarizing layer tends to retract in the reverse direction of the stretching direction after the film is formed earlier due to the stress, the stretching action is to orient the molecules inside the original film, and thus the polarizing effect is formed, and the retraction affects the effect. Therefore, the wrap-around box structure formed in the polarizing protective layer, namely the width direction of the first groove can be perpendicular to the stretching direction of the original film of the polarizer, and the length direction of the first groove is parallel to the polarizing direction of the polarizing layer, so that the original film of the polarizer can be further ensured not to retract, and the reliability of the polarizer is improved.
As a fourth embodiment of the present application, as shown in fig. 8, another display panel 100 is shown, and as a fourth embodiment of the present application, another polarizing plate 200 is also disclosed for attaching to the display panel 100, wherein the first protective layer 210 or the second protective layer 230 is attached to the display panel 100; the display panel 100 further includes a light shielding layer 121, the light shielding layer 121 for shielding light; the plurality of first grooves 211 are disposed corresponding to the regions of the light shielding layer 121. In this embodiment, the phase change energy storage material filled in the first groove 211 has no transmittance requirement, and the low transmittance phase change energy storage material can be selected, so that the transmittance of the display panel 100 is not affected. And the variety of the phase-change energy storage materials can be increased, and the mixture of various phase-change energy storage materials is selected to regulate and control the specific phase-change temperature.
Specifically, the display panel 100 includes a plurality of pixel active switches disposed corresponding to the regions of the light shielding layer 121; the first grooves 211 are provided with a plurality of first grooves 211, the first grooves 211 are arranged in a matrix, and the first grooves 211 are respectively arranged in one-to-one correspondence with the pixel active switches.
Fig. 9 shows a schematic top view of a light shielding layer 121, wherein the rectangle is hollowed out, and the rest area is the light shielding layer 121; the length of the first groove 211 in this embodiment may be proportional to the length and width of the pixel unit, that is, the first groove 211 has a pixel level width, so that the phase-change energy storage material in the first groove 211 better covers the area of the light shielding layer 121, and the light shielding layer 121 in the display panel 100 is not light-emitting, so that the phase-change energy storage material has no high requirement on the transmittance, and the first groove 211 of the present application may completely cover the area of the light shielding layer 121. In a general environment, the first recess 211 need not completely cover the area of the light shielding layer 121, and may be provided only for the pixel active switch.
Unlike the previous embodiment, the first groove 211 in the first groove 211 is different from the previous embodiment in that the first groove 211 in the polarizing plate 200 of the present application may be further configured corresponding to each pixel unit of the display panel 100, and by adjusting the phase change energy storage material, it is ensured that the phase change energy storage material has a certain transmittance, and the transmittance of 30% -60% is satisfied, for example, if paraffin is used alone, materials with excellent transmittance such as polyvinyl alcohol and polyurethane may be selected for use in combination.
The above arrangement manner is to avoid the problem of poor display effect caused by the fact that the transmittance of the phase change energy storage material in the first groove 211 is different from the light propagation direction of the first protective layer 210 in consideration of the fact that the transmittance of the phase change energy storage material in the first groove 211 is different from the transmittance of the first protective layer 210. However, the transmittance of the phase change energy storage material may be made to be identical to the transmittance of the first protection layer 210 by mixing different phase change energy storage materials, and whether the first grooves 211 need to be disposed corresponding to the light shielding layer 121 or the pixel region may be not considered.
It should be noted that, the solution of the foregoing embodiment is also applicable to the second groove, and meanwhile, the second groove and the first groove are set to have different shapes and are set corresponding to different positions, so that various different effects can be achieved, which are not discussed herein.
It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, and the steps written in the previous step may be executed before, may be executed after, or may even be executed simultaneously, so long as the implementation of the present solution is possible, all should be considered as falling within the protection scope of the present application.
It should be noted that the inventive concept of the present application may form a very large number of embodiments, but the application documents are limited in size and cannot be listed one by one, so that the above-described embodiments or technical features may be arbitrarily combined to form new embodiments without conflict, and the original technical effects will be enhanced after the embodiments or technical features are combined
The technical scheme of the application can be widely applied to various display panels, such as TN (Twisted Nematic) display panels, IPS (In-Plane Switching) display panels, VA (Vertical Alignment) display panels, MVA (Multi-Domain Vertical Alignment) display panels, and of course, other types of display panels, such as OLED (Organic Light-Emitting Diode) display panels, can be also applied to the scheme.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.
Claims (8)
1. A polarizing plate, comprising: the polarizing layer is used for carrying out polarizing treatment on incident light and then emitting the incident light, the first protective layer and the second protective layer are respectively arranged on the light inlet surface and the light outlet surface of the polarizing layer and used for protecting the polarizing layer,
the first protection layer is at least partially made of a phase-change energy storage material, the phase-change energy storage material absorbs heat when the temperature is higher than a first preset temperature, and releases heat when the temperature is lower than a second preset temperature;
the first protection layer is made of a main material and a phase-change energy storage material, the first protection layer comprises a plurality of first grooves, the first grooves are arranged on one side, close to the polarizing layer, of the first protection layer, the phase-change energy storage material is arranged in the first grooves, and the first protection layer is adhered to the polarizing layer to seal the first grooves;
the polarizing direction of the polarizing layer is consistent with the length direction of the first groove;
the penetration rate of the phase change energy storage material is between 30% and 60%.
2. The polarizing plate according to claim 1, wherein the phase change energy storage material comprises a solid-solid phase change energy storage material or a solid-liquid phase change energy storage material, the solid-solid phase change energy storage material comprising: one or more of graphenes, inorganic salts, polyols and cross-linked high-density polyethylenes; the solid-liquid phase change energy storage material comprises: one or more of paraffin, polyethylene glycol, polyvinyl alcohol and polyurethane.
3. The polarizing plate according to claim 1, wherein the second protective layer is made of a main body material and a phase-change energy storage material that absorbs heat when the temperature is greater than a first preset temperature and releases heat when the temperature is less than a second preset temperature.
4. The polarizing plate according to claim 1, wherein the second protective layer comprises a plurality of second grooves, the second grooves are arranged on one side of the second protective layer close to the polarizing layer, the phase change energy storage material is arranged in the second grooves, and the second protective layer seals the second grooves in a manner of being adhered to the polarizing layer;
the second grooves are arranged in one-to-one correspondence with the first grooves.
5. The polarizing plate according to claim 1, wherein the polarizing plate is for attaching to a display panel, and the first protective layer or the second protective layer is attached to the display panel; the display panel further comprises a light shielding layer; the plurality of first grooves are arranged corresponding to the area of the shading layer.
6. The polarizing plate according to claim 5, wherein the display panel comprises a plurality of pixel active switches disposed corresponding to regions of the light shielding layer; the first grooves are arranged in a matrix mode, and the first grooves are arranged in one-to-one correspondence with the pixel active switches.
7. The polarizing plate according to claim 1, wherein the first protective layer is formed of only the phase change energy storage material; wherein the phase change energy storage material comprises a solid-solid phase change energy storage material.
8. A display panel, comprising: a display substrate and a polarizing plate provided on one side of the display substrate, characterized in that,
wherein the polarizing plate according to any one of claims 1 to 7 is used.
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| CN202110741719.0A CN113534319B (en) | 2021-06-30 | 2021-06-30 | Polarizing plate and display panel |
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| CN202110741719.0A CN113534319B (en) | 2021-06-30 | 2021-06-30 | Polarizing plate and display panel |
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