CN113534320B - Circular polarizer and organic light emitting diode display panel - Google Patents
Circular polarizer and organic light emitting diode display panel Download PDFInfo
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- CN113534320B CN113534320B CN202110772204.7A CN202110772204A CN113534320B CN 113534320 B CN113534320 B CN 113534320B CN 202110772204 A CN202110772204 A CN 202110772204A CN 113534320 B CN113534320 B CN 113534320B
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- 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
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- 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
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
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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
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- 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
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Abstract
The invention provides a circular polarizer and an organic light emitting diode display panel including the same. The circular polarizer includes: the film comprises a first pressure-sensitive adhesive layer, a phase difference layer, a second pressure-sensitive adhesive layer, a linear polarization layer, an adhesive layer and a supporting and protecting layer, wherein the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer and the adhesive layer all comprise water-absorbing materials. The water-absorbing material is added in the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer of the circular polaroid to block water vapor permeating from the side of the panel, and the water-absorbing material is added in the adhesive layer of the circular polaroid to block water vapor permeating from the outer side of the circular polaroid, so that ammonia gas and water which are remained in the panel film layer in the panel manufacturing process are effectively reduced or blocked to generate ammonium ions through chemical reaction, and the ammonium ions and I ions are effectively prevented from generating ammonium ions5 ‑The complex is complexed and destroyed5 ‑Light absorption function of the complex.
Description
Technical Field
The invention relates to the technical field of display, in particular to a circular polarizer and an organic light emitting diode display panel.
Background
One of the challenges of an organic light-emitting diode (OLED) display panel is to effectively reduce the interference of ambient light to the display effect, and the arrangement of a circular polarizer is one of the solutions.
The circular polarizer is generally disposed on the light emitting surface of the OLED display panel, and includes a linear polarizer and an 1/4 wave plate (phase retarder) stacked together, and ambient light incident from the outside becomes reflected light perpendicular to the polarization direction of the linear polarizer after passing through the linear polarizer and the secondary 1/4 wave plate, so that the reflected light is blocked by the linear polarizer. Circular polarizers, which are commonly used in the art, include linear polarizers that are rich in iodine complexes, which are used for alignment to generate polarization effect, but the iodine complexes absorb light in a specific wavelength range. The existing OLED display panel often generates an abnormal phenomenon that a display picture has color cast in a reliability test, and the reasons for the abnormal phenomenon are as follows: the light absorption function of the iodine complex is destroyed, which results in a decrease in the ability of the polarizer to absorb light of a specific wavelength range, causing a change in the hue of the display.
Therefore, in the OLED display panel of the related art, a problem of color shift due to deterioration of the polarizer needs to be solved.
Disclosure of Invention
The invention provides a circular polarizer and an organic light emitting diode display panel, which can effectively prevent the reduction of light absorption function caused by the damage of iodine complexes.
The present invention provides a circular polarizer, comprising: the optical film comprises a first pressure-sensitive adhesive layer, a phase difference layer arranged on the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer arranged on the phase difference layer, a linear polarization layer arranged on the second pressure-sensitive adhesive layer, an adhesive layer arranged on the linear polarization layer and a supporting protective layer arranged on the adhesive layer; wherein the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer and the adhesive layer each comprise a water-absorbent material.
In the circular polarizer of an embodiment of the present invention, the retardation layer is 1/4 λ retardation layer.
In the circular polarizer of an embodiment of the present invention, the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are made of pressure-sensitive adhesive.
In the circular polarizer of an embodiment of the invention, the linear polarizing layer includes I3 -Complexes and I5 -A complex compound.
The circular polarizer according to an embodiment of the present invention, wherein the water-absorbing material includes nano-scale resin particles or metal oxide particles, and the resin particles or the metal oxide particles are uniformly distributed in the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer, and the adhesive layer.
In the circular polarizer of an embodiment of the present invention, the first pressure-sensitive adhesive layer further includes nano-scale black particles, and the black particles are uniformly distributed in the first pressure-sensitive adhesive layer.
The present invention further provides an organic light emitting diode display panel, including: the display device comprises a substrate, a display device layer arranged on the substrate and a circular polarizer arranged on the display device layer. Wherein the circular polarizer includes: the optical film comprises a first pressure-sensitive adhesive layer, a phase difference layer arranged on the first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer arranged on the phase difference layer, a linear polarization layer arranged on the second pressure-sensitive adhesive layer, an adhesive layer arranged on the linear polarization layer and a supporting protective layer arranged on the adhesive layer; and wherein the first pressure sensitive adhesive layer, the second pressure sensitive adhesive layer, and the adhesive layer each comprise a water-absorbent material.
In the organic light emitting diode display panel according to an embodiment of the present invention, the display device layer includes a thin film transistor layer, an organic light emitting device layer, and a packaging thin film layer, and the circular polarizer is bonded to the packaging thin film layer through the first pressure sensitive adhesive layer.
In an embodiment of the present invention, the linear polarization layer includes I3 -Complexes and I5 -A complex compound of formula I3 -The complexes are used for absorbing light with the wavelength range of 300-560 nm, the I5 -The complexes are useful for absorbing light in the wavelength range between 395 to 700 nm.
In the organic light emitting diode display panel according to an embodiment of the present invention, the water absorbent material includes nano-scale resin particles or metal oxide particles, and the resin particles or the metal oxide particles are uniformly distributed in the first pressure sensitive adhesive layer, the second pressure sensitive adhesive layer, and the adhesive layer.
In the organic light emitting diode display panel according to an embodiment of the present invention, the first pressure sensitive adhesive layer further includes nano-scale black particles, and the black particles are uniformly distributed in the first pressure sensitive adhesive layer.
According to the circular polarizer and the organic light-emitting diode display panel provided by the invention, the water-absorbing material is added into the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer of the circular polarizer to prevent the circular polarizer and the organic light-emitting diode display panel from being damagedThe water vapor permeating from the side of the panel is isolated, and the water absorbing material is added into the adhesive layer of the circular polaroid to isolate the water vapor permeating from the outer side of the circular polaroid, so that the generation of ammonium ions caused by the chemical reaction of ammonia gas and water remained in a panel film layer in the panel manufacturing process is effectively reduced or isolated, and the ammonium ions and I are effectively prevented5 -The complex is complexed and destroyed5 -Light absorption function of the complex. Therefore, the abnormal phenomenon of color phase change of the display picture of the organic light emitting diode display panel is effectively prevented. In addition, the black particles with the nanometer size are additionally added into the first pressure-sensitive adhesive layer, so that the first pressure-sensitive adhesive layer becomes a partially light-transmitting material, the material can reduce the transmission of external light to the panel from the outside and can also reduce the reflection light reflected from the light-emitting surface of the panel. Therefore, the display effect can be further improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a circular polarizer according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a circular polarizer according to a second embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an OLED display panel according to a third embodiment of the present invention;
FIG. 4 shows the ammonium ions and I in the linear polarization layer according to the present invention5 -Schematic representation of the complexation of the complex; and
FIG. 5 shows a schematic view of a diagram I5 -The graph of the light absorption decay of the complex for a range of wavelengths is shown.
Detailed Description
The circular polarizer and the organic light emitting diode display panel according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, the thickness of some layers is exaggerated for clarity of understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily illustrated, but the present application is not limited thereto.
Referring to fig. 1, fig. 1 is a schematic cross-sectional structure view of a circular polarizer according to a first embodiment of the present invention, in which a circular polarizer 10 includes a first pressure-sensitive adhesive layer 100, a phase difference layer 101, a second pressure-sensitive adhesive layer 102, a linear polarization layer 103, an adhesive layer 104, and a supporting protection layer 105. The phase difference layer 101 is arranged on the first pressure-sensitive adhesive layer 100, the second pressure-sensitive adhesive layer 102 is arranged on the phase difference layer 101, the linear polarization layer 103 is arranged on the second pressure-sensitive adhesive layer 102, the adhesive layer 104 is arranged on the linear polarization layer 103, and the support protection layer 105 is arranged on the adhesive layer 104; the first pressure-sensitive adhesive layer 100, the second pressure-sensitive adhesive layer 102, and the adhesive layer 104 all include water-absorbent materials.
Preferably, the retardation layer 101 comprises an 1/4 λ retardation layer. When horizontal polarized light passes through the 1/4 lambda phase difference layer, the horizontal polarized light is converted into left circularly polarized light, the left circularly polarized light is reflected by the OLED anode metal electrode and is rotated by 180 degrees into right circularly polarized light, the right circularly polarized light passes through the 1/4 lambda phase difference film and is converted into vertical polarized light, the vertical polarized light cannot pass through linear polarization with the absorption axis in the vertical direction and cannot emit light, and through the steps, external environment light is blocked in the circular polarized light sheet, so that the display contrast of the OLED display panel is improved, and screen content can be clearly seen even under strong sunlight.
The linearly polarizing layer 103 contains I3 -Complexes and I5 -A complex compound of formula I3 -The complexes being used to absorb light in the wavelength range from 300 to 560nm, I5 -For complexesAbsorbing light in the wavelength range between 395 and 700 nm. The linearly polarizing layer is usually formed by subjecting a single layer of a film-like polyvinyl alcohol resin (PVA resin) to dyeing treatment and stretching treatment to form a dichroic material, e.g., I3 -Complexes and I5 -The complex is absorbed in the PVA resin in an aligned state to form a polarizing layer.
Specifically, the material of the supporting protective layer 105 is, for example: cellulose Triacetate (TAC). The materials of the linear polarizing layer 103 are, for example: polyvinyl alcohol (PVA). Cellulose triacetate and polyvinyl alcohol are used as materials for optical films because of their excellent optical activity, but these two materials also have high water absorption and therefore have an effect on the stability of optical films. In this embodiment, by adding the water-absorbing material to the first pressure-sensitive adhesive layer 100, the second pressure-sensitive adhesive layer 102, and the adhesive layer 104, on one hand, the water-absorbing deformation of the supporting and protecting layer 105 and the linear polarization layer 103 is prevented, and on the other hand, the iodine complexes in the linear polarization layer 103 are prevented from being degraded.
Preferably, the water-absorbent material comprises nano-sized resin particles such as a copolymer of polyacrylic acid (PAA) and sodium polyacrylate or metal oxide particles such as alumina. The resin particles or the metal oxide particles are uniformly distributed in the first pressure-sensitive adhesive layer 100, the second pressure-sensitive adhesive layer 102, and the adhesive layer 104. The water-absorbing material is added into the first pressure-sensitive adhesive layer 100 and the second pressure-sensitive adhesive layer 102 of the circular polarizer 10 to block the water vapor permeating from the panel side, and the water-absorbing material is added into the adhesive layer 104 of the circular polarizer 10 to block the water vapor permeating from the outer side of the circular polarizer 10, so that the ammonia gas and the water which are remained in the panel film layer in the panel manufacturing process and are subjected to chemical reaction to generate ammonium ions in the panel manufacturing process are effectively reduced or blocked, and the ammonium ions and the I in the linear polarizing layer 103 are effectively prevented from generating ammonium ions5 -Iodine atoms in the complex being complexed to destroy I5 -Light absorption function of the complex.
Referring to fig. 2, fig. 2 is a schematic cross-sectional structure view of a circular polarizer 20 according to a second embodiment of the present invention, in which the circular polarizer 20 includes a first pressure-sensitive adhesive layer 200, a phase difference layer 201, a second pressure-sensitive adhesive layer 202, a linear polarization layer 203, an adhesive layer 204, and a supporting protection layer 205. The phase difference layer 201 is arranged on the first pressure-sensitive adhesive layer 200, the second pressure-sensitive adhesive layer 202 is arranged on the phase difference layer 201, the linear polarizing layer 203 is arranged on the second pressure-sensitive adhesive layer 202, the adhesive layer 204 is arranged on the linear polarizing layer 203, and the support protective layer 205 is arranged on the adhesive layer 204; the first pressure-sensitive adhesive layer 200, the second pressure-sensitive adhesive layer 202, and the adhesive layer 204 all include water-absorbent materials.
Preferably, retardation layer 201 comprises an 1/4 λ retardation layer. The linearly polarizing layer 203 contains I3 -Complexes and I5 -A complex compound of formula I3 -The complexes being used to absorb light in the wavelength range from 300 to 560nm, I5 -The complexes are useful for absorbing light in the wavelength range between 395 to 700 nm. The linearly polarizing layer is usually formed by subjecting a single layer of a film-like polyvinyl alcohol resin (PVA resin) to dyeing treatment and stretching treatment to form a dichroic material, e.g., I3 -Complexes and I5 -The complex is absorbed in the PVA resin in an aligned state to form a polarizing layer.
Specifically, the material of the supporting protection layer 205 is, for example: cellulose Triacetate (TAC). The material of the linear polarizing layer 203 is, for example: polyvinyl alcohol (PVA). Cellulose triacetate and polyvinyl alcohol are used as materials for optical films because of their excellent optical activity, but these two materials also have high water absorption and therefore have an effect on the stability of optical films. In this embodiment, by adding the water-absorbing material to the first pressure-sensitive adhesive layer 200, the second pressure-sensitive adhesive layer 202, and the adhesive layer 204, on one hand, the water-absorbing deformation of the supporting protection layer 205 and the linear polarization layer 203 is prevented, and on the other hand, the iodine complexes in the linear polarization layer 203 are prevented from being degraded.
Preferably, the water-absorbent material comprises nano-sized resin particles such as polyacrylic acid (PAA) particles or metal oxide particles such as aluminum oxide particles. The resin particles or the metal oxide particles are uniformly distributed in the first pressure-sensitive adhesive layer 200, the second pressure-sensitive adhesive layer 202, and the adhesive layer 204.
Further, unlike the first embodiment, the black particles having a nano-scale size are further contained in the first pressure-sensitive adhesive layer 200, and the black particles are uniformly distributed in the first pressure-sensitive adhesive layer 200. In this embodiment, the black particles may be nano silver particles. Specifically, a chemical reduction method can be adopted, a reducing agent is added into a silver ion solution, ions obtain electrons and are reduced into metal, and then a proper protective agent and a suspension dispersing agent are matched to avoid agglomeration, so that a nano silver particle solution with the particle size of less than 100nm can be obtained. It is understood that when silver is subdivided into a size smaller than the wavelength of light, the original metallic silver gloss is lost and black is presented.
The concentration of the nano silver particle solution can be prepared according to actual requirements, and the nano silver particle solutions with the concentrations of 10ppm, 100ppm and 1000ppm respectively present yellow, wine red and black. The nano silver particle solution is mixed in when the material of the first pressure sensitive adhesive layer 200 is prepared, and the nano silver particles are uniformly distributed therein by using a method such as mechanical stirring. By adding water-absorbing materials into the first pressure-sensitive adhesive layer 200 and the second pressure-sensitive adhesive layer 202 of the circular polarizer 20 to block the water vapor permeating from the panel side, and by adding water-absorbing materials into the adhesive layer 204 of the circular polarizer 20 to block the water vapor permeating from the outer side of the circular polarizer 20, the ammonia gas remaining in the panel film layer is effectively reduced or blocked from chemically reacting with the water to generate ammonium ions, thereby effectively preventing the ammonium ions from generating ammonium ions with the I in the linear polarizing layer 2035 -The complex is complexed to destroy I5 -Light absorption function of the complex.
In addition, the nano silver particles are additionally added in the first pressure sensitive adhesive layer 200, so that the first pressure sensitive adhesive layer 200 becomes a partially light-transmitting material, the material can reduce the transmission of external light to the panel from the outside, and meanwhile, the reflection light reflected from the light-emitting surface of the panel can also be reduced. In addition, it is worth mentioning that the nano silver particles have specific spectral absorption peaks near the wavelength of 410nm, and have a synergistic auxiliary effect on solving the abnormal problem of color cast of the display picture, so that the display effect can be further improved.
Referring to fig. 3, fig. 3 is a schematic cross-sectional structure view of an Organic Light Emitting Diode (OLED) display panel according to a third embodiment of the invention. OLED display panel 1 includes substrate 11, display device layers (12, 13, 14) including thin-film-transistor layer 12, organic light-emitting device layer 13, and encapsulation thin-film layer 14, and circular polarizer 20. The circular polarizer 10 is disposed on the display device layer.
Referring to fig. 1, the circular polarizer 10 includes a first pressure sensitive adhesive layer 100, a phase difference layer 101, a second pressure sensitive adhesive layer 102, a linear polarization layer 103, an adhesive layer 104, and a supporting protection layer 105. The first pressure-sensitive adhesive layer 100, the second pressure-sensitive adhesive layer 102, and the adhesive layer 104 all include water-absorbent materials.
Preferably, the retardation layer 101 comprises an 1/4 λ retardation layer. The linearly polarizing layer 103 contains I3 -Complexes and I5 -A complex compound of formula I3 -The complexes being used to absorb light in the wavelength range from 300 to 560nm, I5 -The complexes are useful for absorbing light in the wavelength range between 395 to 700 nm. Preferably, the water-absorbent material comprises nano-sized resin particles such as polyacrylic acid (PAA) particles or metal oxide particles such as aluminum oxide particles.
The resin particles or the metal oxide particles are uniformly distributed in the first pressure-sensitive adhesive layer 100, the second pressure-sensitive adhesive layer 102, and the adhesive layer 104. By adding water-absorbing materials into the first pressure-sensitive adhesive layer 100 and the second pressure-sensitive adhesive layer 102 of the circular polarizer 20 for blocking the water vapor permeating from the panel side, and by adding water-absorbing materials into the adhesive layer 104 of the circular polarizer 10 for blocking the water vapor permeating from the outer side of the circular polarizer 10, the ammonia gas remaining in the panel film layer is effectively reduced or blocked from chemically reacting with water to generate ammonium ions, so that the ammonium ions and the I in the linear polarizing layer 103 can be effectively prevented from being generated5 -The complex is complexed to destroy I5 -Light absorption function of the complex.
In addition, black particles having a nano-scale size may be further included in the first pressure-sensitive adhesive layer 100, and the black particles are uniformly distributed in the first pressure-sensitive adhesive layer 100. Specifically, the chemical reduction method can be adopted to obtain the nano silver particle solution with the particle size of less than 100 nm. It is understood that when silver is subdivided into a size smaller than the wavelength of light, the original metallic silver gloss is lost and black is presented. The concentration of the nano silver particle solution can be prepared according to actual requirements, and the nano silver particle solutions with the concentrations of 10ppm, 100ppm and 1000ppm respectively present yellow, wine red and black. The nano silver particle solution is mixed in when the material of the first pressure sensitive adhesive layer 100 is prepared, and the nano silver particles are uniformly distributed therein by using a method such as mechanical stirring. By additionally adding the nano silver particles into the first pressure-sensitive adhesive layer 100, the first pressure-sensitive adhesive layer 100 becomes a partially light-transmitting material, and the material can reduce the transmission of external light to the panel from the outside and reduce the reflection light reflected from the light-emitting surface of the panel. In addition, the nano silver particles have specific spectral absorption peaks near the wavelength of 410nm, and have a synergistic auxiliary effect on solving the abnormal problem of color cast of a display picture, so that the display effect can be further improved.
Referring to fig. 4, fig. 4 shows ammonium ions and I in the linear polarizing layer according to a first embodiment of the present invention5 -Schematic representation of the complexation of the complex. Water vapor permeates from the side of the panel or the outer side of the circular polarizer and reacts with ammonia gas remained in the panel film layer to generate ammonium ions (NH)4 +)，NH4 +Will interact with I in the linearly polarizing layer5 -The complex chemically reacts to form ammonium iodide (NH)4I) Due to I5 -The structure of the complex is destroyed, resulting in a sudden drop in its light absorption function.
Referring to FIG. 5, FIG. 5 shows a schematic view of a section I of the present invention5 -The graph of the light absorption decay of the complex for a range of wavelengths is shown. In FIG. 5 in terms of wavelength (units)nm) is the abscissa, which indicates I5 -The absorption peak of the complex is at 575 nm. The ordinate in FIG. 5 indicates the absorption intensity of this absorption peak, I5 -The absorbance of the complex at the absorption peak was about 0.4. It is clear from FIG. 5 that I is destroyed after reaction with ammonium ions5 -A complex (shown by the dashed curve) whose absorbance drops sharply from about 0.4 to about 0.21 for light having a wavelength of about 575 nm.
As described above, the present invention effectively reduces or prevents the generation of ammonium ions due to the chemical reaction between ammonia gas and water remaining in the panel film by adding the water-absorbing material to the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer of the circular polarizer to block the water vapor permeating from the panel side, and by adding the water-absorbing material to the adhesive layer of the circular polarizer to block the water vapor permeating from the outside of the circular polarizer, thereby effectively preventing the generation of ammonium ions due to the chemical reaction between the ammonia gas and water in the panel film, and thus effectively preventing the generation of ammonium ions and I in the linear polarizing layer5 -The complex being complexed to destroy I5 -Light absorption function of the complex. In addition, the black particles with the nanometer size are additionally added into the first pressure-sensitive adhesive layer, so that the first pressure-sensitive adhesive layer becomes a partially light-transmitting material, the material can reduce the transmission of external light to the panel from the outside, and meanwhile, the reflected light reflected from the light-emitting surface of the panel can be reduced. Therefore, the display effect can be further improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A circular polarizer, comprising:
a first pressure-sensitive adhesive layer;
the phase difference layer is arranged on the first pressure-sensitive adhesive layer;
the second pressure-sensitive adhesive layer is arranged on the phase difference layer;
the linear polarization layer is arranged on the second pressure-sensitive adhesive layer;
an adhesive layer disposed on the linear polarizing layer; and
a support protective layer disposed on the adhesive layer;
wherein the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer, and the adhesive layer each comprise a water-absorbent material.
2. The circular polarizer according to claim 1, wherein the phase difference layer comprises 1/4 λ phase difference layer.
3. The circular polarizer of claim 1, wherein the linear polarizing layer comprises I3 -Complexes and I5 -A complex compound.
4. The circular polarizer according to claim 1, wherein the water absorbing material comprises nano-sized resin particles or metal oxide particles, and the resin particles or the metal oxide particles are uniformly distributed in the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer, and the adhesive layer.
5. The circular polarizer according to claim 4, wherein the first pressure-sensitive adhesive layer further comprises nano-sized black particles, and the black particles are uniformly distributed in the first pressure-sensitive adhesive layer.
6. An organic light emitting diode display panel, comprising:
a substrate;
a display device layer disposed on the substrate; and
a circular polarizer disposed on the display device layer, the circular polarizer comprising:
a first pressure-sensitive adhesive layer;
1/4 lambda phase difference layer disposed on the first pressure sensitive adhesive layer;
a second pressure sensitive adhesive layer disposed on the 1/4 lambda phase difference layer;
the linear polarization layer is arranged on the second pressure-sensitive adhesive layer;
an adhesive layer disposed on the linear polarizing layer; and
a support protective layer disposed on the adhesive layer;
wherein the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer, and the adhesive layer each comprise a water-absorbent material.
7. The OLED display panel of claim 6, wherein the display device layer comprises a thin film transistor layer, an organic light emitting device layer, and an encapsulation thin film layer, and the circular polarizer is bonded to the encapsulation thin film layer through the first pressure sensitive adhesive layer.
8. The OLED display panel of claim 6, wherein the linear polarizing layer comprises I3 -Complexes and I5 -A complex compound.
9. The organic light-emitting diode display panel according to claim 8, wherein the water absorbent material contains nano-scale sized resin particles or metal oxide particles, and the resin particles or the metal oxide particles are uniformly distributed in the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer, and the adhesive layer.
10. The organic light emitting diode display panel of claim 9, wherein the first pressure sensitive adhesive layer further comprises nano-scale sized black particles, the black particles being uniformly distributed in the first pressure sensitive adhesive layer.
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| TWI572600B (en) * | 2013-01-10 | 2017-03-01 | Konica Minolta Inc | Resin composition, triazole compound, optical film, polarizing plate, optical lens, circular polarizing plate, and image display device |
| CN109904207B (en) * | 2019-03-18 | 2021-03-05 | 上海天马有机发光显示技术有限公司 | Flexible polarizer, organic light-emitting display panel comprising same and preparation method |
| CN110828700A (en) * | 2019-12-06 | 2020-02-21 | 中国乐凯集团有限公司 | Flexible packaging adhesive film for flexible OLED device |
| CN112864337A (en) * | 2021-01-12 | 2021-05-28 | 深圳市华星光电半导体显示技术有限公司 | Flexible display panel and preparation method thereof |
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