CN107340561B - Polarizing plate and liquid crystal display - Google Patents
Polarizing plate and liquid crystal display Download PDFInfo
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- CN107340561B CN107340561B CN201710788202.0A CN201710788202A CN107340561B CN 107340561 B CN107340561 B CN 107340561B CN 201710788202 A CN201710788202 A CN 201710788202A CN 107340561 B CN107340561 B CN 107340561B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 49
- 239000010410 layer Substances 0.000 claims abstract description 214
- 239000011241 protective layer Substances 0.000 claims abstract description 30
- 238000010521 absorption reaction Methods 0.000 claims abstract description 26
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 28
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 28
- 239000011521 glass Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 229920002284 Cellulose triacetate Polymers 0.000 claims description 7
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 2
- 239000002184 metal Substances 0.000 abstract description 31
- 230000010287 polarization Effects 0.000 abstract description 27
- 239000010408 film Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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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
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—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
- G02F1/133528—Polarisers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a polarizing plate and a liquid crystal display screen, wherein the polarizing plate comprises a first protective layer, a first polarizing layer, a quarter-wave plate, a second polarizing layer and a second protective layer which are sequentially attached; the part of the second polarizing layer, which is positioned in the display area of the liquid crystal display screen, has a polarizing function; the first polarizing layer and the second polarizing layer have an axial angle of absorption axis of 0 + -5 degrees or 90 + -5 degrees. According to the technical scheme, natural light can sequentially penetrate through the first polarization layer, the quarter-wave plate and the second polarization layer, the light is reflected through metal and the like of the liquid crystal display screen and then sequentially penetrates through the second polarization layer, the quarter-wave plate and the first polarization layer, so that the light can be fully absorbed by the first polarization layer and the second polarization layer, and the first polarization layer and the second polarization layer can absorb different linearly polarized light through the axial angle of an absorption axis between the first polarization layer and the second polarization layer, so that the purpose of reducing metal reflected light is achieved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display devices, in particular to a polarizing plate and a liquid crystal display screen.
Background
The LCD device includes a liquid crystal panel and a backlight system. The liquid crystal panel is composed of two layers of glass substrates, a liquid crystal layer is sandwiched between the two layers of glass substrates, and polarizing plates are attached to the upper and lower outer surfaces of the glass substrates. The liquid crystal display device implements an optical switching function using a liquid crystal for modulating polarized light and a polarizing plate for forming polarized light and selectively absorbing the polarized light.
In general, the upper and lower polarizing plates attached to the upper and lower outer surfaces of the liquid crystal panel are substantially the same in material, and each polarizing plate is composed of a polarizing layer PVA (Polyvinyl Alcohol) combined with a TAC (Triacetyl Cellulose) layer. However, the transmittance of the polarizing plate is about 40%, and although the metal reflection light can be reduced to some extent, the metal reflection light cannot be completely eliminated, which affects the viewing comfort of the user and the overall appearance of the television.
Disclosure of Invention
The invention mainly aims to provide a polarizing plate and a liquid crystal display screen, and aims to solve the technical problems that the conventional polarizing plate influences the watching comfort of a user and influences the integral aesthetic degree of a television.
In order to achieve the above object, the present invention provides a polarizing plate applied to a liquid crystal display, wherein the polarizing plate is disposed outside a TFT glass substrate in the liquid crystal display, and the polarizing plate includes a first protective layer, a first polarizing layer, a quarter-wave plate, a second polarizing layer, and a second protective layer, which are sequentially attached to each other;
the part of the second polarizing layer, which is positioned in the display area of the liquid crystal display screen, has a polarizing function;
the first polarizing layer and the second polarizing layer have an axial angle of absorption axis of 0 + -5 degrees or 90 + -5 degrees.
In one embodiment, the material of the first protective layer and the second protective layer is TAC triacetylcellulose.
In one embodiment, the material of the first polarizing layer and the second polarizing layer is PVA polyvinyl alcohol.
In one embodiment, a portion of the second polarizing layer located in a non-display area of the liquid crystal display panel has a polarizing function.
In one embodiment, the angle between the first polarizing layer and the quarter-wave plate is 45 degrees, so that the light transmitted through the quarter-wave plate is circularly polarized light.
In one embodiment, the angle between the second polarizing layer and the quarter-wave plate is 45 degrees, so that the light transmitted through the second polarizing layer is linearly polarized light,
in one embodiment, the first polarizing layer is perpendicular to the second polarizing layer such that the first polarizing layer and the second polarizing layer have an absorption axis axial angle of 90 degrees.
In one embodiment, the first polarizing layer is parallel to the second polarizing layer such that the first polarizing layer and the second polarizing layer have an absorption axis axial angle of 0 degrees.
The invention also provides a subject II, namely a liquid crystal display screen, which comprises the polarizing plate.
The technical proposal of the invention is that a quarter-wave plate is arranged between a first polarizing layer and a second polarizing layer, and a portion of the second polarizing layer located at the display area in the liquid crystal display panel has a polarizing function, the axial angle of the absorption axes of the first polarizing layer and the second polarizing layer is 0 +/-5 degrees or 90 +/-5 degrees, so that natural light can sequentially transmit the light of the first polarizing layer, the quarter-wave plate and the second polarizing layer, after being reflected by metal of the liquid crystal display screen, the light passes through the second polarizing layer, the quarter-wave plate and the first polarizing layer in sequence, thereby enabling the light to be sufficiently absorbed by the first and second polarizing layers, and the axial angle of the absorption axis between the first and second polarizing layers, the first polarizing layer and the second polarizing layer can absorb different linearly polarized light, so that the purpose of reducing metal reflected light is achieved. In addition, in the area without the polarization function in the second polarization layer, the circularly polarized light does not change after passing through the area, the optical rotation state of the circularly polarized light is changed after being reflected by the metal routing, the left rotation is changed into the right rotation, the circularly polarized light is changed into the linearly polarized light after passing through the quarter wave plate, and the reflected light is perpendicular to or parallel to the polarization direction of the linearly polarized light which passes through the first polarization layer when being incident, so that the circularly polarized light is completely absorbed by the first polarization layer and cannot be transmitted by the reflected light.
Drawings
FIG. 1 is a schematic structural diagram of a polarizer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a polarizer according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another embodiment of a polarizer of the present invention;
FIG. 4 is a schematic diagram of a polarizing plate according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a polarizing plate according to still another embodiment of the invention.
The reference numbers illustrate:
| 10 | first protective layer | 20 | A first polarizing |
| 30 | |
40 | Second polarizing |
| 50 | Second protective layer |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a polarizing plate.
Referring to fig. 1 to 5, in which, fig. 1 is a schematic structural diagram of a polarizing plate according to an embodiment of the invention; FIG. 2 is a schematic diagram of a polarizer according to an embodiment of the present invention; FIG. 3 is a schematic diagram of another embodiment of a polarizer of the present invention; FIG. 4 is a schematic diagram of a polarizing plate according to another embodiment of the present invention; FIG. 5 is a schematic diagram of a polarizing plate according to still another embodiment of the invention.
In the embodiment of the present invention, the polarizing plate is applied to a liquid crystal display, the polarizing plate is disposed outside a TFT (Thin Film Transistor) glass substrate in the liquid crystal display, and the polarizing plate includes a first protective layer 10, a first polarizing layer 20, a quarter-wave plate 30, a second polarizing layer 40, and a second protective layer 50, which are sequentially attached.
The portion of the second polarizing layer 40 located in the display area of the liquid crystal display panel has a polarizing function. The first polarizing layer 20 and the second polarizing layer 40 have an axial angle of an absorption axis of 0 ± 5 degrees or 90 ± 5 degrees.
In this embodiment, the material of the first protective layer 10 is TAC, and the material of the second protective layer 50 is TAC; the material of the first polarizing layer 20 is PVA, and the material of the second polarizing layer 40 is PVA. The first protective layer 10, the first polarizing layer 20, the quarter-wave plate 30, the second polarizing layer 40 and the second protective layer 50 can be adhered by an adhesive. In the present embodiment, the polarizer is disposed outside the TFT glass substrate of the liquid crystal display panel, i.e., on the side close to the user; in other embodiments, the polarizer may also be disposed on a side of the CF glass substrate away from the TFT glass substrate.
In this embodiment, when the first polarizing layer 20 or the second polarizing layer 40 is manufactured and formed, firstly, the formed PVA is dyed, and specifically, the formed PVA is soaked in an iodine solution, wherein a part of the formed PVA is completely soaked, only the part of the second polarizing layer 40, which is formed and located in the display area of the liquid crystal display screen, is soaked in the remaining formed PVA, and then, the dyed formed PVA is stretched, for example, the formed PVA with a length of 1m is stretched to 7-8 m, and the like, and then, the polarizing layer is reached, wherein the completely soaked formed PVA finally obtains the first polarizing layer 20, and only the formed PVA, which is located in the display area of the liquid crystal display screen, in the second polarizing layer 40 is soaked, and finally, the second polarizing layer 40 is obtained.
The axial angle precision of the absorption axes of the first polarization photon and the second polarization photon is different by 0-10 degrees. Specifically, the axial angle of the absorption axes of the first polarizing layer 20 and the second polarizing layer 40 is 0 degree or 90 degrees, that is, the absorption axes of the first polarizing layer 20 and the second polarizing layer 40 are axially parallel or axially perpendicular.
In one embodiment, the angle between the first polarizing layer 20 and the quarter-wave plate 30 is 45 degrees, so that the light transmitted through the quarter-wave plate 30 is circularly polarized light.
In this embodiment, an angle of 45 degrees is formed between the first polarizing layer 20 and the quarter-wave plate 30, so that an angle between the polarization of the light passing through the first polarizing layer 20 and the optical axis of the mica of the quarter-wave plate 30 is 45 degrees, and the light passing through the first polarizing layer 20 passes through the quarter-wave plate 30 to form circularly polarized light.
Further, in one embodiment, the angle between the second polarizing layer 40 and the quarter-wave plate 30 is 45 degrees, so that the light transmitted through the second polarizing layer 40 is linearly polarized light.
In this embodiment, an angle between the second polarizing layer 40 and the quarter-wave plate 30 is 45 degrees, so that the circularly polarized light transmitted through the quarter-wave plate 30 forms linearly polarized light after passing through the second polarizing layer 40.
Preferably, in an embodiment, the first polarizing layer 20 is perpendicular to the second polarizing layer 40, so that the absorption axis axial angle of the first polarizing layer 20 and the second polarizing layer 40 is 90 degrees.
In this embodiment, the first polarizing layer 20 is perpendicular to the second polarizing layer 40, so that the absorption axis axial angle of the first polarizing layer 20 and the second polarizing layer 40 is 90 degrees, i.e. the absorption axis axial direction of the first polarizing layer 20 and the second polarizing layer 40 is perpendicular.
Preferably, in a further embodiment, the first polarizing layer 20 is parallel to the second polarizing layer 40, so that the absorption axis axial angle of the first polarizing layer 20 and the second polarizing layer 40 is 0 degree.
In this embodiment, the first polarizing layer 20 is parallel to the second polarizing layer 40, so that the absorption axis axial angle of the first polarizing layer 20 and the second polarizing layer 40 is 0 degree, i.e. the absorption axes of the first polarizing layer 20 and the second polarizing layer 40 are axially parallel.
Generally, in a non-display area at the edge of a liquid crystal panel of a liquid crystal display, metal routing is more dense, and the line width is larger, so that the problem of metal reflection generated in the non-display area is more serious than that in a display area of the liquid crystal panel. In this embodiment, only the portion of the second polarizing layer 40 located in the display area of the liquid crystal display panel has a polarizing function, so as to solve the problem of metal reflection in the non-display area.
Further, in another embodiment, a portion of the second polarizing layer 40 located in a non-display area of the liquid crystal display panel has a polarizing function.
In the embodiment, when the second polarizing layer 40 is formed, the formed PVA is dyed, specifically, the formed PVA is completely soaked in an iodine solution, and then the dyed formed PVA is stretched, for example, the formed PVA with a length of 1m is stretched to 7 to 8m, and further to the second polarizing layer 40.
It is easily understood that 4 typical polarizing plates can be formed by the above embodiments.
A polarizing plate I: the protective film comprises a first protective layer 10, a first polarizing layer 20, a quarter-wave plate 30, a second polarizing layer 40 and a second protective layer 50 which are sequentially attached; the part of the second polarizing layer 40 located in the display area of the liquid crystal display panel has a polarizing function; the angle of the included angle between the first polarizing layer 20 and the quarter-wave plate 30 is 45 degrees; the angle of the included angle between the second polarizing layer 40 and the quarter-wave plate 30 is 45 degrees; the first polarizing layer 20 is perpendicular to the second polarizing layer 40, and the axial angle of the absorption axis of the first polarizing layer 20 and the second polarizing layer 40 is 90 ± 5 degrees.
The polarizing plate can solve the problem of metal reflection in the non-display area. As shown in fig. 2, the principle is that natural light is changed into linearly polarized light after passing through the first protective layer 10, then changed into circularly polarized light after passing through the quarter-phase retardation film (wave plate), and changed into linearly polarized light perpendicular to the linearly polarized light passing through the first polarizing layer 20 after passing through the area having the polarizing function in the second polarizing layer 40, and then reflected light is changed again in the polarizing direction after being reflected by the metal wiring (metal layer), partially absorbed by the second PVA layer and reflected light is absorbed for the second time after passing through the first PVA layer, so as to achieve the purpose of reducing metal reflected light; in the second polarizing layer 40, the area without polarizing function is not changed after the circularly polarized light passes through the area, the optical rotation state of the circularly polarized light is changed after the circularly polarized light is reflected by the metal trace (metal layer), the left-hand rotation is changed into the right-hand rotation, the circularly polarized light passes through the quarter phase difference film and is changed into the linearly polarized light, and the reflected light is perpendicular to the polarization direction of the linearly polarized light which passes through the first polarizing layer 20 when the light is incident, so the light is completely absorbed by the first polarizing layer 20 and no reflected light passes through.
A second polarizing plate: the protective film comprises a first protective layer 10, a first polarizing layer 20, a quarter-wave plate 30, a second polarizing layer 40 and a second protective layer 50 which are sequentially attached; the part of the second polarizing layer 40 located in the display area of the liquid crystal display panel has a polarizing function; the angle of the included angle between the first polarizing layer 20 and the quarter-wave plate 30 is 45 degrees; the angle of the included angle between the second polarizing layer 40 and the quarter-wave plate 30 is 45 degrees; the first polarizing layer 20 is parallel to the second polarizing layer 40, and the axial angle of the absorption axis of the first polarizing layer 20 and the second polarizing layer 40 is 0 ± 5 degrees.
The second polarizer can also solve the problem of metal reflection in the non-display area. As shown in fig. 3, the principle is that natural light is changed into linearly polarized light after passing through the first protective layer 10, then changed into circularly polarized light after passing through the quarter-phase retardation film (wave plate), and changed into linearly polarized light parallel to the linearly polarized light passing through the first polarizing layer 20 after passing through the area having the polarizing function in the second polarizing layer 40, and then reflected light is changed again in the polarizing direction after being reflected by the metal wiring (metal layer), partially absorbed by the second PVA layer and reflected light is absorbed for the second time after passing through the first PVA layer, so as to achieve the purpose of reducing metal reflected light; in the second polarizing layer 40, the area without polarizing function is not changed after the circularly polarized light passes through the area, the optical rotation state of the circularly polarized light is changed after the circularly polarized light is reflected by the metal trace (metal layer), the left-hand rotation is changed into the right-hand rotation, the circularly polarized light passes through the quarter phase difference film and is changed into the linearly polarized light, and the reflected light is perpendicular to the polarization direction of the linearly polarized light which passes through the first polarizing layer 20 when the light is incident, so the light is completely absorbed by the first polarizing layer 20 and no reflected light passes through.
A polarizing plate III: the protective film comprises a first protective layer 10, a first polarizing layer 20, a quarter-wave plate 30, a second polarizing layer 40 and a second protective layer 50 which are sequentially attached; the portion of the second polarizing layer 40 located in the display area of the liquid crystal display panel has a polarizing function, and the portion of the second polarizing layer 40 located in the non-display area of the liquid crystal display panel has a polarizing function; the angle of the included angle between the first polarizing layer 20 and the quarter-wave plate 30 is 45 degrees; the angle of the included angle between the second polarizing layer 40 and the quarter-wave plate 30 is 45 degrees; the first polarizing layer 20 is perpendicular to the second polarizing layer 40, and the axial angle of the absorption axis of the first polarizing layer 20 and the second polarizing layer 40 is 90 ± 5 degrees.
As shown in fig. 4, the principle is that natural light is changed into linearly polarized light after passing through the first protective layer 10, then changed into circularly polarized light after passing through the quarter-phase retardation film (wave plate), and changed into linearly polarized light perpendicular to the linearly polarized light passing through the first polarizing layer 20 after passing through the second polarizing layer 40, and then reflected light polarization direction is changed again after being reflected by the metal wiring (metal layer), and the reflected light is partially absorbed by the second PVA layer and is absorbed for the second time after passing through the first PVA layer, thereby achieving the purpose of reducing metal reflected light.
And a polarizing plate IV: the protective film comprises a first protective layer 10, a first polarizing layer 20, a quarter-wave plate 30, a second polarizing layer 40 and a second protective layer 50 which are sequentially attached; the portion of the second polarizing layer 40 located in the display area of the liquid crystal display panel has a polarizing function, and the portion of the second polarizing layer 40 located in the non-display area of the liquid crystal display panel has a polarizing function; the angle of the included angle between the first polarizing layer 20 and the quarter-wave plate 30 is 45 degrees; the angle of the included angle between the second polarizing layer 40 and the quarter-wave plate 30 is 45 degrees; the first polarizing layer 20 is perpendicular to the second polarizing layer 40, and the axial angle of the absorption axis of the first polarizing layer 20 and the second polarizing layer 40 is 0 ± 5 degrees.
As shown in fig. 5, the principle is that natural light is changed into linearly polarized light after passing through the first protective layer 10, then changed into circularly polarized light after passing through the quarter-phase retardation film (wave plate), and changed into linearly polarized light parallel to the linearly polarized light passing through the first polarizing layer 20 after passing through the second polarizing layer 40, and then reflected light polarization direction is changed again after being reflected by the metal wiring (metal layer), and the reflected light is partially absorbed by the second PVA layer and is absorbed for the second time after passing through the first PVA layer, thereby achieving the purpose of reducing metal reflected light.
According to the technical scheme of the invention, the quarter-wave plate 30 is arranged between the first polarizing layer 20 and the second polarizing layer 40, and the part of the second polarizing layer 40, which is positioned in the display area of the liquid crystal display screen, has a polarizing function, the axial angles of the absorption axes of the first polarizing layer 20 and the second polarizing layer 40 are 0 +/-5 degrees or 90 +/-5 degrees, so that natural light can sequentially transmit the light of the first polarizing layer 20, the quarter-wave plate 30 and the second polarizing layer 40, the light can be fully absorbed by the first polarizing layer 20 and the second polarizing layer 40 after being reflected by metal and the like of the liquid crystal display screen and then sequentially transmits the light of the second polarizing layer 40, the quarter-wave plate 30 and the first polarizing layer 20, further the light can be fully absorbed by the first polarizing layer 20 and the second polarizing layer 40, and the axial angle of the absorption axes between the first polarizing layer 20 and the second polarizing layer 40 can enable the first polarizing layer 20 and the second polarizing layer 40 to absorb different linearly, thereby achieving the purpose of reducing metal reflected light. In addition, in the area without the polarization function in the second polarization layer 40, the circularly polarized light passes through the area without change, the optical rotation state of the circularly polarized light changes after being reflected by the metal traces, the left-hand rotation becomes the right-hand rotation, and the circularly polarized light passes through the quarter-phase difference film and becomes the linearly polarized light, and the reflected light is perpendicular to or parallel to the polarization direction of the linearly polarized light passing through the first polarization layer 20 when the light is incident, so the light is completely absorbed by the first polarization layer 20 and no reflected light passes through.
The present invention further provides a liquid crystal display, a liquid crystal display and a polarizing plate, wherein the specific structure of the polarizing plate refers to the above embodiments, and since the liquid crystal display of the present embodiment adopts all technical solutions of all the above embodiments, all beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not repeated herein.
The liquid crystal display panel can adopt one polarizing plate or two polarizing plates in the edge area and three polarizing plates or four polarizing plates in the central area.
It should be noted that the technical solutions of the embodiments of the present invention can be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should be considered to be absent and not to be within the protection scope of the present invention.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A polarizing plate is applied to a liquid crystal display screen and arranged on the outer side of a TFT glass substrate in the liquid crystal display screen, and is characterized by comprising a first protective layer, a first polarizing layer, a quarter-wave plate, a second polarizing layer and a second protective layer which are sequentially attached;
the part of the second polarizing layer, which is positioned in the display area of the liquid crystal display screen, has a polarizing function, and the part of the second polarizing layer, which is positioned in the non-display area of the liquid crystal display screen, has no polarizing function;
the axial angle of the absorption axes of the first polarizing layer and the second polarizing layer is 0 +/-5 degrees or 90 +/-5 degrees;
the angle of an included angle between the first polarizing layer and the quarter-wave plate is 45 degrees, so that light penetrating through the quarter-wave plate is circularly polarized light;
the angle of an included angle between the second polarizing layer and the quarter-wave plate is 45 degrees, so that light penetrating through the second polarizing layer is linearly polarized light.
2. The polarizing plate of claim 1, wherein the first protective layer and the second protective layer are made of TAC triacetyl cellulose.
3. The polarizing plate of claim 1, wherein the material of the first polarizing layer and the second polarizing layer is PVA polyvinyl alcohol.
4. The polarizing plate of any one of claims 1 to 3, wherein the first polarizing layer is perpendicular to the second polarizing layer such that the first polarizing layer and the second polarizing layer have an absorption axis axial angle of 90 degrees.
5. The polarizing plate of any one of claims 1 to 3, wherein the first polarizing layer is parallel to the second polarizing layer such that the first polarizing layer and the second polarizing layer have an absorption axis axial angle of 0 degrees.
6. A liquid crystal display panel comprising the polarizing plate according to any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788202.0A CN107340561B (en) | 2017-09-04 | 2017-09-04 | Polarizing plate and liquid crystal display |
| PCT/CN2018/094302 WO2019042008A1 (en) | 2017-09-04 | 2018-07-03 | Polarizer and liquid crystal display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788202.0A CN107340561B (en) | 2017-09-04 | 2017-09-04 | Polarizing plate and liquid crystal display |
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| CN107340561B true CN107340561B (en) | 2020-07-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340561B (en) * | 2017-09-04 | 2020-07-21 | 深圳Tcl新技术有限公司 | Polarizing plate and liquid crystal display |
| CN108287384A (en) * | 2018-02-09 | 2018-07-17 | 深圳创维－Rgb电子有限公司 | A kind of liquid crystal display panel and its LCD TV |
| CN110233165A (en) * | 2019-05-13 | 2019-09-13 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN111950335B (en) * | 2019-05-17 | 2023-07-21 | 荣耀终端有限公司 | Laminated structure, display panel and electronic device |
| CN110133787B (en) * | 2019-05-23 | 2022-01-11 | Oppo广东移动通信有限公司 | Polaroid, display module and mobile terminal |
| CN111208596A (en) * | 2020-03-05 | 2020-05-29 | 武汉华星光电半导体显示技术有限公司 | Polaroid and display panel |
| CN111538183A (en) * | 2020-05-18 | 2020-08-14 | 东莞晶邦光电科技有限公司 | High-definition display screen and high-definition laminating process |
| CN112164324B (en) * | 2020-09-04 | 2022-07-15 | 中国科学技术大学 | Organic light-emitting display device with changing polarization state of outgoing light |
| CN114597234A (en) * | 2020-12-04 | 2022-06-07 | 中强光电股份有限公司 | display device |
| CN115201956A (en) * | 2021-04-09 | 2022-10-18 | 群创光电股份有限公司 | Electronic device and manufacturing method of electronic device |
| CN113917589B (en) * | 2021-09-10 | 2024-10-18 | 明基材料有限公司 | Full-circle curved surface polarizing plate |
| CN114578569A (en) * | 2022-03-18 | 2022-06-03 | 广州立景创新科技有限公司 | Display module and method of manufacturing the same |
| CN116092391A (en) * | 2023-01-09 | 2023-05-09 | 深圳市光科全息技术有限公司 | Optical diaphragm, LED display module and LED display screen |
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| CN204790249U (en) * | 2015-06-30 | 2015-11-18 | 上海冠显光电科技有限公司 | Visual display device under sunshine |
| CN107340561B (en) * | 2017-09-04 | 2020-07-21 | 深圳Tcl新技术有限公司 | Polarizing plate and liquid crystal display |
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| CN1191610A (en) * | 1995-06-26 | 1998-08-26 | 美国3M公司 | Liquid crystal display projection system using multilayer optical film polarizers |
| CN1169188A (en) * | 1995-11-22 | 1997-12-31 | 菲利浦电子有限公司 | Illumination system, linear polarizer for such and illumination system and display device comprising such an illumination system |
| US5973760A (en) * | 1997-08-06 | 1999-10-26 | Rockwell Science Center, Inc. | Display apparatus having quarter-wave plate positioned to eliminate conflicts with polarized sunglasses |
| CN106154637A (en) * | 2016-09-23 | 2016-11-23 | 京东方科技集团股份有限公司 | A kind of display panels, display device and preparation method |
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| Publication number | Publication date |
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| WO2019042008A1 (en) | 2019-03-07 |
| CN107340561A (en) | 2017-11-10 |
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