CN112433286A - Polaroid and display device - Google Patents
Polaroid and display device Download PDFInfo
- Publication number
- CN112433286A CN112433286A CN201910789190.2A CN201910789190A CN112433286A CN 112433286 A CN112433286 A CN 112433286A CN 201910789190 A CN201910789190 A CN 201910789190A CN 112433286 A CN112433286 A CN 112433286A
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- China
- Prior art keywords
- layer
- viewing angle
- polarizer
- display device
- angle compensation
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Classifications
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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
-
- 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
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
Abstract
The embodiment of the disclosure relates to a polarizer and a display device. The polarizer is suitable for a bendable display device and can comprise: the linear polarization layer is used for converting ambient light into linearly polarized light; the oblique viewing angle compensation layer is arranged opposite to the linear polarization layer, and an orthographic projection area of the oblique viewing angle compensation layer at least covers the bending area of the display device; and the front viewing angle compensation layer is positioned between the linear polarization layer and the oblique viewing angle compensation layer. The scheme of this disclosed embodiment is through the use of positive visual angle compensation layer and squint angle compensation layer, can all carry out the phase difference compensation to the light at positive visual angle and squint angle when can buckle display device, effectively solves the regional ambient light reflection problem of buckling to a certain extent, and then improves display device's whole display effect.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of display, in particular to a polarizer and a display device.
Background
In a conventional polarizer, for example, a polarizer for an AMOLED, due to a thicker lamination, the flexibility of a panel is reduced, and a compensation film therein can only compensate ambient light at a positive viewing angle, and cannot effectively compensate ambient light at an oblique viewing angle, so that the flexible AMOLED panel has poor display effect due to reflection of ambient light in a bending region in the bending process.
Accordingly, there is a need to ameliorate one or more of the problems with the related art solutions described above.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the embodiments of the present disclosure is to provide a polarizer and a display device, thereby overcoming, at least to some extent, one or more of the problems due to the limitations and disadvantages of the related art.
According to a first aspect of the embodiments of the present disclosure, there is provided a polarizer suitable for a bendable display device, the polarizer including:
the linear polarization layer is used for converting ambient light into linearly polarized light;
the oblique viewing angle compensation layer is arranged opposite to the linear polarization layer, and an orthographic projection area of the oblique viewing angle compensation layer at least covers the bending area of the display device;
and the front viewing angle compensation layer is positioned between the linear polarization layer and the oblique viewing angle compensation layer.
In an exemplary embodiment of the present disclosure, the front view angle compensation layer and the oblique view angle compensation layer are phase difference compensation film layers.
In an exemplary embodiment of the present disclosure, the front viewing angle compensation layer includes a first retardation compensation film layer and a second retardation compensation film layer which are stacked and different from each other.
In an exemplary embodiment of the present disclosure, the first retardation compensation film layer includes a half-wave plate layer, and the second retardation compensation film layer includes a quarter-wave plate layer.
In an exemplary embodiment of the present disclosure, the thickness of the front view angle compensation layer is within 2 μm.
In one exemplary embodiment of the present disclosure, the oblique-viewing angle compensation layer is a + C film.
In an exemplary embodiment of the present disclosure, the linear polarizing layer has a thickness of 5 μm or less.
In an exemplary embodiment of the present disclosure, the polarizer further includes:
the protective layer is positioned on the upper surface of the linear polarization layer;
and the surface functional layer is positioned on the upper surface of the protective layer.
In one exemplary embodiment of the present disclosure, the front view angle compensation layer is formed through a coating process.
According to a second aspect of the embodiments of the present disclosure, there is provided a display device including:
a display panel;
in the polarizer of any of the above embodiments, the oblique viewing angle compensation layer of the polarizer is located above the display panel.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the embodiment of the disclosure, through the use of the normal viewing angle compensation layer and the oblique viewing angle compensation layer, the phase difference compensation can be performed on the lights at the normal viewing angle and the oblique viewing angle when the bendable display device is bent, the problem of reflection of ambient light at the bending area is effectively solved to a certain extent, and then the whole display effect of the display device is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 shows a schematic of a prior art polarizer construction;
FIG. 2 is a schematic view of the polarizer of FIG. 1 after bending;
FIG. 3 shows a schematic structural view of a polarizer in an exemplary embodiment of the present disclosure;
FIG. 4 shows a schematic view of a display device including the polarizer of FIG. 3 after bending;
FIG. 5 illustrates a schematic diagram of phase compensation in an exemplary embodiment of the present disclosure;
fig. 6 shows a schematic structural view of another polarizer in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
Referring to fig. 1, the polarizer of the prior art shown in fig. 1-2 sequentially includes, from top to bottom, a surface functional layer 100, an upper protective layer 101, a linear polarizing layer 102, a lower protective layer 103, and a front viewing angle compensation layer 104. The whole thickness is thicker, and the bending performance is poorer; only the front viewing angle compensation layer 104 can compensate the ambient light at the front viewing angle, and the ambient light at the oblique viewing angle cannot be effectively compensated, so that the display device including the polarizer, for example, a flexible AMOLED screen, has poor display effect due to the reflection of the ambient light in the bending region during the bending process.
According to a first aspect of the embodiments of the present disclosure, a polarizer as shown in fig. 3, which is suitable for a foldable display device, such as the display device shown in fig. 4, may include: the linear polarization layer 202 is used for converting ambient light into linearly polarized light; the oblique viewing angle compensation layer 204 is arranged opposite to the linear polarization layer 202, and an orthographic projection area of the oblique viewing angle compensation layer 204 at least covers a bending area of the display device; and a positive viewing angle compensation layer 203 between the linear polarization layer 202 and the oblique viewing angle compensation layer 204.
Through the polaroid in the above-mentioned embodiment, through the use of line polarisation layer, positive visual angle compensating layer and squint angle compensating layer, compare prior art and reduced partial rete, effectively thinned the effective thickness of polaroid, improved its bending property, and make the display device who adopts this polaroid more frivolous. Through the use of the normal visual angle compensation layer and the oblique visual angle compensation layer, the problem of ambient light reflection can be effectively solved to a certain extent, and then the display effect is improved.
The orthographic projection area of the oblique viewing angle compensation layer 204 can only cover the folding line area of the display device, which is beneficial to reducing the material consumption in the polarizer manufacturing process and further saving the cost. Of course, the oblique viewing angle compensation layer 204 may cover the entire lower surface of the front viewing angle compensation layer 203 of the display device.
Further, optionally, in an embodiment, the front view angle compensation layer 203 and the oblique view angle compensation layer 204 may be phase difference compensation film layers, and may respectively compensate for phase differences of the front view angle and the oblique view angle, so as to improve a display effect.
Further, optionally, in an embodiment, the front view angle compensation layer 203 may include a first retardation compensation film 2031 and a second retardation compensation film 2032 which are stacked and different from each other. The first retardation compensation film 2031 and the second retardation compensation film 2032 may be made of the same material or different materials, and for example, compensation films made of liquid crystal material may be used. The method and the device are used for compensating different phase differences, so that the display effect is improved.
Further, optionally, in one embodiment, the first retardation compensation layer 2031 includes a half wave plate layer (HWP), and the second retardation compensation layer 2032 includes a quarter wave plate layer (QWP).
Further, optionally, in one embodiment, as shown in fig. 5, the squint angle compensating layer 204 may be a + C film or a + C-like film with an optical axis perpendicular to the surface, i.e., nz＞nx＝nyWherein n isxAxial (slow phase) refractive index which shows the maximum refractive index in the film plane; n isyIs the refractive index in the direction orthogonal to the slow axis; n iszThe refractive index in the perpendicular direction out of the film plane. The oblique angle compensation layer can be a columnar liquid crystal material, only carries out phase compensation on light with an oblique angle, and does not have a compensation effect on light with a positive angle. When light with an oblique viewing angle passes through the HWP + QWP, the light becomes elliptically polarized light, and the oblique viewing angle compensation layer 204 performs a certain phase compensation on the elliptically polarized light, so that the elliptically polarized light is converted into circularly polarized light, the circularly polarized light is reflected by the electrode 300 of the display panel, such as a cathode, and is converted into linearly polarized light parallel to the absorption axis of the linear polarizing layer 202 after passing through the HWP + QWP, and then is absorbed by the linear polarizing layer, thereby improving the display effect. The positive viewing angle compensation layer 203 may convert linearly polarized light passing through the linear polarization layer into left-handed elliptically polarized light, perform phase difference compensation, and protect the linear polarization layer 202. Therefore, the lower protective layer of the polaroid of the embodiment can be removed, and the thickness of the polaroid is further reduced.
Further, optionally, in an embodiment, the thickness of the front viewing angle compensation layer 203 is within 2 μm, for example, 1 μm or 2 μm, but is not limited thereto. Further, optionally, in an embodiment, the front viewing angle compensation layer 203 may be formed by a coating process, which may include, but is not limited to, any one of a wire bar coating method, an extrusion coating method, and a direct gravure coating method. The manufactured polaroid can be thinner in a coating mode, so that the thickness of the polaroid can be effectively reduced, and the display device is thinner.
Further, optionally, in an embodiment, the thickness of the linear polarization layer 202 may be within 5 μm, and the linear polarization layer 202 may be made of a polyvinyl alcohol (PVA) material, but is not limited thereto. The thickness of the polaroid can be effectively reduced by the arrangement, so that the display device is thinner.
Further, optionally, in an embodiment, as shown in fig. 6, the polarizer further includes: a protective layer 201 and a surface functional layer 200. The protective layer 201 is located on the upper surface of the linear polarizing layer 202 and is used for protecting the linear polarizing layer 202 and preventing substances such as water and oxygen from making the linear polarizing layer 202 ineffective. The protective layer 201 may be made of material such as Triacetylcellulose (TAC), but is not limited thereto. The surface functional layer 200 is positioned on the upper surface of the protective layer 201. The surface functional layer 200 may include AG (Anti-Glare layer)/HC (Hard coating)/LR (Low Reflection film), but is not limited thereto. In this embodiment, the surface functional layer 200 may include an HC layer for preventing the polarizer from being scratched during transportation or attachment.
Further, optionally, in an embodiment, when the polarizer and the other film layers are bonded, glue such as PSA or OCA may be used.
According to a second aspect of the embodiments of the present disclosure, a display device is provided, which may include a display panel and the polarizer of any of the above embodiments, wherein the squint angle compensation layer 204 of the polarizer is located above the display panel.
For example, the polarizer may be adhered to the top of the display panel by a glue such as PSA or OCA. The display panel may include an OLED display panel or the like.
Adopt the polaroid in above-mentioned embodiment among the display device, through the use of line polarisation layer, normal view angle compensation layer and squint angle compensation layer, compare prior art and reduced partial rete, effectively thinned the effective thickness of polaroid, improved its bending property. Through the use of the normal visual angle compensation layer and the oblique visual angle compensation layer, the problem of ambient light reflection can be effectively solved, and the display effect of the display device is further improved.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A polarizer adapted for a bendable display device, the polarizer comprising:
the linear polarization layer is used for converting ambient light into linearly polarized light;
the oblique viewing angle compensation layer is arranged opposite to the linear polarization layer, and an orthographic projection area of the oblique viewing angle compensation layer at least covers the bending area of the display device;
and the front viewing angle compensation layer is positioned between the linear polarization layer and the oblique viewing angle compensation layer.
2. The polarizer according to claim 1, wherein the positive viewing angle compensating layer and the oblique viewing angle compensating layer are phase difference compensating film layers.
3. The polarizer of claim 2, wherein the positive viewing angle compensation layer comprises a first retardation compensation film layer and a second retardation compensation film layer which are stacked and different from each other.
4. The polarizer of claim 3, wherein the first retardation compensation film layer comprises a half-wave plate layer, and the second retardation compensation film layer comprises a quarter-wave plate layer.
5. The polarizer according to any of claims 1 to 4, wherein the thickness of the positive viewing angle compensating layer is within 2 μm.
6. The polarizer of claim 5, wherein the oblique-viewing angle compensating layer is a + C film.
7. The polarizer of claim 5, wherein the linear polarizing layer has a thickness of 5 μm or less.
8. The polarizer of claim 7, further comprising:
the protective layer is positioned on the upper surface of the linear polarization layer;
and the surface functional layer is positioned on the upper surface of the protective layer.
9. The polarizer according to claim 5, wherein the positive viewing angle compensation layer is formed by a coating process.
10. A display device, comprising:
a display panel;
the polarizer of any of claims 1 to 9, wherein the compensation layer for oblique viewing angle of the polarizer is located above the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789190.2A CN112433286A (en) | 2019-08-26 | 2019-08-26 | Polaroid and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789190.2A CN112433286A (en) | 2019-08-26 | 2019-08-26 | Polaroid and display device |
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| CN112433286A true CN112433286A (en) | 2021-03-02 |
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| CN201910789190.2A Pending CN112433286A (en) | 2019-08-26 | 2019-08-26 | Polaroid and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113485042A (en) * | 2021-06-30 | 2021-10-08 | 厦门天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN114203931A (en) * | 2021-12-10 | 2022-03-18 | 武汉华星光电半导体显示技术有限公司 | Display device |
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Application publication date: 20210302 |