CN111610666A - Liquid crystal panel and display device - Google Patents
Liquid crystal panel and display device Download PDFInfo
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- CN111610666A CN111610666A CN202010591192.3A CN202010591192A CN111610666A CN 111610666 A CN111610666 A CN 111610666A CN 202010591192 A CN202010591192 A CN 202010591192A CN 111610666 A CN111610666 A CN 111610666A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—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
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—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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- 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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- Optics & Photonics (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a liquid crystal panel and a display device, wherein the liquid crystal panel comprises an array substrate, a liquid crystal layer, a color film substrate and an anti-peeping film layer, the array substrate and the color film substrate are oppositely arranged, the liquid crystal layer is arranged between the array substrate and the color film substrate, and the anti-peeping film layer is arranged on one side of the array substrate close to the color film substrate and used for adjusting the phase delay of non-axial light rays penetrating through the anti-peeping film layer so as to improve the light leakage quantity of the non-axial light rays. The liquid crystal panel and the display device provided by the invention can realize the peep-proof effect.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal panel and a display device.
Background
In the existing display technology industry, since the general idea is that it is better to make the visual viewing angle of the display device larger, and it is better to make the light leakage smaller, so that people can observe the contents displayed on the display device in a larger viewing angle range, and the contents displayed on the display device can be observed more easily. Accordingly, in the existing display technology industry, various enterprises are striving to make the visual angle of the display panel large.
However, when a user uses a relatively private display device such as a mobile phone, a palm-sized tablet computer, a notebook computer, or the like in a public place, the user often does not want others to peek at the content displayed on his display device. However, since the existing display device has a large visual angle, people around the user can clearly see the content displayed on the display device within a certain distance, and thus the content related to the privacy of the user may be leaked by being peeped by others, which is very disadvantageous to the confidentiality of personal information security.
Disclosure of Invention
The present invention is directed to at least one of the technical problems of the prior art, and provides a liquid crystal panel and a display device, which can achieve a peep-proof effect.
The liquid crystal panel further comprises an anti-peeping film layer, wherein the anti-peeping film layer is arranged on one side of the array substrate close to the color film substrate and used for adjusting the phase delay of the non-axial light rays penetrating through the anti-peeping film layer so as to improve the light leakage quantity of the non-axial light rays.
Preferably, the peeping prevention film layer comprises a + C peeping prevention film layer, a-C peeping prevention film layer or an + AC peeping prevention film layer.
Preferably, the peep-proof film layer is arranged between the array substrate and the liquid crystal layer, or between the color film substrate and the liquid crystal layer.
Preferably, the color film substrate comprises a substrate and a color film layer arranged on one side of the substrate facing the liquid crystal layer, or is arranged between the color film layer and the substrate.
Preferably, the liquid crystal panel further includes a first polarizer and a second polarizer, wherein the first polarizer is disposed on a side of the color film substrate away from the liquid crystal layer, the second polarizer is disposed on a side of the array substrate away from the liquid crystal layer, and a light transmission axis of the first polarizer is perpendicular to a light transmission axis of the second polarizer;
the peep-proof film layer is arranged on one side, close to the first polarizer, of the array substrate, or is arranged in a specified position, capable of adjusting the phase delay of the non-axial light passing through the peep-proof film layer, of the first polarizer in a built-in mode.
Preferably, the peep-proof film layer is arranged between the color film substrate and the first polarizer.
Preferably, the first polarizer includes an adhesive layer, a first protective film layer, a polarizing layer, a second protective film layer, and a protective film layer, which are sequentially disposed along a direction away from the color film substrate, and the designated position includes a position between the adhesive layer and the first protective film layer.
Preferably, the liquid crystal panel further includes a first alignment film and a second alignment film, which are disposed opposite to each other, the first alignment film is disposed between the liquid crystal layer and the color film substrate, the second alignment film is disposed between the liquid crystal layer and the array substrate, an alignment direction of the first alignment film is perpendicular to a light absorption axis of the first polarizer, and an alignment direction of the second alignment film is parallel to a light absorption axis of the second polarizer.
Preferably, the liquid crystal panel further includes a compensation film layer, the compensation film layer is disposed on one side of the array substrate close to the color film substrate, an optical axis direction of the compensation film layer is parallel to an initial optical axis direction of liquid crystal molecules in the liquid crystal layer, a sum of a phase retardation of the compensation film layer and a phase retardation of the liquid crystal layer is an integral multiple of a wavelength of incident light, and the compensation film layer is configured to adjust the phase retardation of the incident light passing through the compensation film layer and the liquid crystal layer when the liquid crystal panel is subjected to an external force in a dark state, so as to reduce a light leakage amount of the incident light when the liquid crystal panel is subjected to the external force in the dark state.
The invention also provides a display device comprising the liquid crystal panel.
The invention has the following beneficial effects:
the liquid crystal panel provided by the invention has the advantages that the peep-proof film layer is arranged on one side of the array substrate close to the color film substrate, the phase delay of the non-axial light passing through the peep-proof film layer is adjusted through the peep-proof film layer, the polarization state of the non-axial light passing through the peep-proof film layer can be adjusted, the polarization state of the non-axial light of which the polarization state is linearly polarized light is circularly polarized after passing through the peep-proof film layer and the liquid crystal layer, so that the light leakage quantity of the non-axial light is improved, the light emitted from the non-axial direction of the liquid crystal panel is increased, the contrast of the content displayed on the non-axial direction of the display device provided by the liquid crystal panel is reduced, the content displayed on the display device is in a bright white state when the display device is observed from the non-axial direction of the display device, and the content displayed on the display device cannot be clearly seen when the display device is observed from the non-, and then the peep-proof effect can be realized.
The display device provided by the invention can realize the peep-proof effect by virtue of the liquid crystal panel provided by the invention.
Drawings
FIG. 1 is a schematic diagram of an advanced super-dimensional field switching mode LCD panel;
FIG. 2 is a schematic diagram of another structure of an advanced super-dimensional field switching mode LCD panel;
FIG. 3 is a diagram illustrating the simulation effect of the light leakage of a prior art liquid crystal panel in a large-angle oblique viewing direction;
FIG. 4 is a schematic diagram illustrating a simulation effect of light leakage of a liquid crystal panel in a large-angle oblique viewing angle direction according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a poincare sphere model of a liquid crystal panel according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another poincare sphere model of a liquid crystal panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the invention;
fig. 8 is another schematic structural diagram of a liquid crystal panel according to an embodiment of the invention;
fig. 9 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of a liquid crystal panel according to another embodiment of the invention;
fig. 11 is a schematic structural view of a peep-proof film layer built in a first polarizer in a liquid crystal panel according to an embodiment of the present invention;
fig. 12 is a schematic structural view illustrating a light absorption axis of a first polarizer and an alignment direction of a first alignment film in a liquid crystal panel according to an embodiment of the present invention;
fig. 13 is a schematic structural view illustrating a light absorption axis of a second polarizer and an alignment direction of a second alignment film in an lcd panel according to an embodiment of the present invention;
FIG. 14 is another schematic diagram illustrating a light absorption axis of a first polarizer and an alignment direction of a first alignment film in an LCD panel according to an embodiment of the present invention;
FIG. 15 is another schematic view of an optical absorption axis of a second polarizer and an alignment direction of a second alignment film in an LCD panel according to an embodiment of the present invention;
FIG. 16 is a diagram illustrating a simulation effect of light leakage of a liquid crystal panel in a large-angle oblique viewing direction according to an embodiment of the present invention;
FIG. 17 is a diagram illustrating another simulation effect of the amount of light leakage of the liquid crystal panel in the large-angle oblique viewing direction according to the embodiment of the invention;
fig. 18 is a schematic structural diagram of a liquid crystal panel according to yet another embodiment of the present invention;
fig. 19 is a schematic structural diagram of a liquid crystal panel according to yet another embodiment of the present invention;
FIG. 20 is a diagram illustrating color coordinates of light leakage of a prior art liquid crystal panel;
FIG. 21 is a diagram illustrating color coordinates of light leakage of a liquid crystal panel according to an embodiment of the present invention;
description of reference numerals:
11-an array substrate; 12-a liquid crystal layer; 121-liquid crystal molecules; 13-a color film substrate; 131-a substrate base plate; 132-a color film layer; 14-a peep-proof membrane layer; 15-a first polarizer; 151-adhesive layer; 1511-release film; 1512-an adhesive layer; 152-a first protective film layer; 153-a polarizing layer; 154-a second protective film layer; 155-protective film layer; 16-a second polarizer; 17-a compensation film layer; 18-a first alignment film; 19-second alignment film.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the liquid crystal panel and the display device provided by the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 7 to 11, the present embodiment provides a liquid crystal panel, including an array substrate 11, a liquid crystal layer 12, and a color filter substrate 13, where the array substrate 11 is disposed opposite to the color filter substrate 13, the liquid crystal layer 12 is disposed between the array substrate 11 and the color filter substrate 13, the liquid crystal panel further includes a peep-proof film layer 14, and the peep-proof film layer 14 is disposed on a side of the array substrate 11 close to the color filter substrate 13, and is used to adjust a phase retardation of a non-axial light passing through the peep-proof film layer 14, so as to improve a light leakage amount of the non-axial light.
Specifically, an In-Plane Switching (IPS) mode Liquid crystal panel and an Advanced Super Dimension Switching (ADS) mode Liquid crystal panel are Liquid crystal panels commonly used for large viewing angle Liquid crystal display devices (LCDs).
As shown in fig. 1, a liquid crystal display device using a liquid crystal panel in the advanced super-dimensional field conversion mode is specifically described as an example, the liquid crystal panel in the advanced super-dimensional field conversion mode includes an array substrate 11, a liquid crystal layer 12, and a color filter substrate 13, where the array substrate 11 is disposed opposite to the color filter substrate 13, and the liquid crystal layer 12 is disposed between the array substrate 11 and the color filter substrate 13. As shown in fig. 2, in order to enable the liquid crystal panel in the advanced super-dimensional field conversion mode to display an image, a first polarizer 15 is further disposed on a side of the color film substrate 13 away from the liquid crystal layer 12, and a second polarizer 16 is further disposed on a side of the array substrate 11 away from the liquid crystal layer 12, where a light transmission axis of the first polarizer 15 is perpendicular to a light transmission axis of the second polarizer 16. Since the liquid crystal molecules 121 in the liquid crystal layer 12 do not emit light, a backlight source (not shown in the drawings) for emitting light is further required, and the light emitted from the backlight source enters the second polarizer 16, sequentially passes through the second polarizer 16, the array substrate 11, the liquid crystal layer 12, the color filter substrate 13 and the first polarizer 15, and is emitted from the first polarizer 15.
The polarization state of the light entering from the second polarizer 16 and passing through the second polarizer 16 is linear polarization state, and the polarization direction is parallel to the light transmission axis of the second polarizer 16 and perpendicular to the light transmission axis of the first polarizer 15, the initial state of the liquid crystal molecules 121 in the liquid crystal layer 12 in the liquid crystal panel in the advanced super-dimensional field conversion mode is horizontally arranged, under the condition of no electric field, the liquid crystal molecules 121 have no twisting effect on the light, the polarization state of the light passing through the liquid crystal layer 12 is not changed and is still linearly polarized light, and the polarization direction is kept unchanged, that is, the polarization state is parallel to the light transmission axis of the second polarizer 16 and perpendicular to the light transmission axis of the first polarizer 15. Since the polarization direction of the light is perpendicular to the light transmission axis of the first polarizer 15, the light cannot pass through the second polarizer 16, and the lcd device using the lcd panel of the advanced super-dimensional field switching mode is in a dark state, i.e., displays a dark image. Under the condition of applying an electric field, the liquid crystal molecules 121 rotate to be able to distort light, so that the polarization state of the light passing through the liquid crystal layer 12 is changed, thus changing the polarization direction of the light, and enabling the light to pass through the second polarizer 16 to be emitted, thereby enabling the liquid crystal display device of the liquid crystal panel adopting the advanced super-dimensional field conversion mode to be in a bright state, i.e., displaying a bright picture.
In the liquid crystal panel provided in this embodiment, the peep-proof film layer 14 is disposed on one side of the array substrate 11 close to the color film substrate 13, and the peep-proof film layer 14 is used to adjust the phase retardation of the non-axial light (the non-axial direction is a direction which is not perpendicular to the liquid crystal panel) passing through the peep-proof film layer 14, so as to adjust the polarization state of the non-axial light passing through the peep-proof film layer 14, so that the polarization state of the non-axial light which is linearly polarized light after passing through the peep-proof film layer 14 and the liquid crystal layer 12 is circularly polarized light, thereby increasing the light leakage amount of the non-axial light, increasing the light emitted from the non-axial direction of the liquid crystal panel, so as to reduce the contrast of the content displayed on the non-axial direction of the display device provided in this embodiment, and thus when the display device is viewed from the non-axial direction (the non-axial direction is a direction which is not perpendicular, the content displayed on the display device is in a bright white state, so that when the display device is observed from a non-axial direction of the display device, the content displayed on the display device cannot be clearly observed, and further, the peep-proof effect can be realized.
When the display device is viewed from the axial direction of the display device (the axial direction is a direction perpendicular to the display device), that is, the front viewing direction of a user of the display device, the content displayed on the display device is not in a bright white state, so that when the display device is viewed from the axial direction of the display device, the content displayed on the display device can still be normally and clearly viewed.
As can be seen from the simulation effect of the light leakage amount of the liquid crystal panel in the large-angle oblique viewing angle direction of the prior art shown in fig. 3 and the simulation effect of the light leakage amount of the liquid crystal panel in the large-angle oblique viewing angle direction provided by the present embodiment shown in fig. 4, the light leakage amount of the liquid crystal panel in the large-angle oblique viewing angle direction provided by the present embodiment (the shaded portion in fig. 4) is larger than the light leakage amount of the liquid crystal panel in the large-angle oblique viewing angle direction (the shaded portion in fig. 3) of the prior art.
Optionally, the privacy film layer 14 may include a + C privacy film layer 14, a-C privacy film layer 14, or a + AC privacy film layer 14.
Alternatively, the phase retardation of the privacy film layer 14 may be in the range of 200nm to 350 nm.
As shown in fig. 7 to 11, in the present embodiment, the privacy protecting film layer 14 may be disposed on a side of the array substrate 11 close to the color filter substrate 13, and it can be understood that the privacy protecting film layer 14 may be disposed on a light incident side of the liquid crystal layer 12, or may be disposed on a light emergent side of the liquid crystal layer 12, as long as the privacy protecting film layer 14 is close to the color filter substrate 13 relative to the array substrate 11.
Specifically, the poincare sphere model respectively shows that when the peep-proof film layer 14 is disposed on the light incident side of the liquid crystal layer 12, that is, when the light emitted from the backlight source passes through the peep-proof film layer 14 and then passes through the liquid crystal layer 12, the light emitted from the backlight source passes through the polarization state of each component in the liquid crystal panel (as shown in fig. 5), and when the peep-proof film layer 14 is disposed on the light emitting side of the liquid crystal layer 12, that is, when the light emitted from the backlight source passes through the liquid crystal layer 12 and then passes through the peep-proof film layer 14, the light emitted from the backlight source passes through the polarization state of each component in the. Any point of the poincare sphere represents a polarization state, a point on the sphere of the poincare sphere represents fully polarized light, a point on the sphere center represents natural light, a point on the sphere represents partially polarized light, a longitude on the poincare sphere represents an azimuth angle, and a latitude on the poincare sphere represents an ellipticity. Therefore, points on the equator of the poincare sphere represent linearly polarized light, the upper and lower poles represent right-handed circularly polarized light and left-handed circularly polarized light, respectively, and other points on the sphere represent elliptically polarized light, wherein the upper hemisphere represents right-handed elliptically polarized light and the lower hemisphere represents left-handed elliptically polarized light.
Optionally, when the peep-proof film layer 14 is disposed on the light incident side of the liquid crystal layer 12, the peep-proof film layer 14 may be disposed between the array substrate 11 and the liquid crystal layer 12, and when the peep-proof film layer 14 is disposed on the light emergent side of the liquid crystal layer 12, the peep-proof film layer 14 may be disposed between the color film substrate 13 and the liquid crystal layer 12.
As shown in fig. 7, when the privacy film layer 14 is disposed on the light incident side of the liquid crystal layer 12, the privacy film layer 14 may be disposed between the array substrate 11 and the liquid crystal layer 12. At this time, as shown in fig. 5, the processes of the polarization state of the light emitted from the backlight passing through the liquid crystal panel on the poincare sphere are respectively as follows: after passing through the second polarizer 16, the polarization state of the light is linearly polarized light and is represented by a point a on the poincare sphere; after passing through the peep-proof film layer 14, the polarization state of the non-axial light is circularly polarized light and is represented by a point B on a Poincare sphere; after passing through the liquid crystal layer 12, the polarization state of the non-axial light is elliptically polarized light, which is represented by a point C on a Poincare sphere; since the polarization state of the non-axial light is circularly polarized light, the amount of the non-axial light emitted from the first polarizer 15 is increased, so that the light leakage amount of the non-axial light is increased, and the amount of the non-axial light emitted from the liquid crystal panel is increased.
As shown in fig. 8, optionally, when the privacy film layer 14 is disposed on the light exit side of the liquid crystal layer 12, the privacy film layer 14 may be disposed between the color film substrate 13 and the liquid crystal layer 12. At this time, as shown in fig. 6, the processes of the polarization state of the light emitted from the backlight source on the poincare sphere when the light passes through the liquid crystal panel are respectively as follows: after passing through the second polarizer 16, the polarization state of the light is linearly polarized light and is represented by a point a on the poincare sphere; after passing through the liquid crystal layer 12, the polarization state of the non-axial light is elliptically polarized light, which is represented by a point B on a Poincare sphere; after passing through the peep-proof film layer 14, the polarization state of the non-axial light is circularly polarized light, which is represented by point C on the poincare sphere, and the polarization state of the non-axial light is circularly polarized light, so that the amount of the non-axial light emitted from the first polarizer 15 is increased, the light leakage amount of the non-axial light is increased, and the light emitted from the non-axial direction of the liquid crystal panel is increased.
Of course, in practical applications, the position of the peep-proof film layer 14 is not limited to the above two. Optionally, as shown in fig. 9, the color film substrate 13 may include a substrate 131 and a color film layer 132 disposed on a side of the substrate 131 facing the liquid crystal layer 12, and the peep-proof film layer 14 may also be disposed between the color film layer 132 and the substrate 131.
As shown in fig. 10 and fig. 11, in this embodiment, the liquid crystal panel may further include a first polarizer 15 and a second polarizer 16, where the first polarizer 15 is disposed on a side of the color film substrate 13 away from the liquid crystal layer 12, the second polarizer 16 is disposed on a side of the array substrate 11 away from the liquid crystal layer 12, and a light transmission axis of the first polarizer 15 is perpendicular to a light transmission axis of the second polarizer 16; the peep-proof film layer 14 may also be disposed on a side of the array substrate 11 close to the first polarizer 15, or may also be embedded in the first polarizer 15 at a designated position capable of adjusting the phase retardation of the non-axial light passing through the peep-proof film layer 14.
Specifically, when the liquid crystal panel further includes the first polarizer 15 and the second polarizer 16, the peep prevention film layer 14 is disposed at a position in the liquid crystal panel, except for a position in the liquid crystal panel where the first polarizer 15 and the second polarizer 16 are not disposed. Optionally, the peep-proof film layer 14 may also be disposed on a side of the array substrate 11 close to the first polarizer 15, or may also be embedded in the first polarizer 15 at a designated position capable of adjusting the phase retardation of the non-axial light passing through the peep-proof film layer 14.
As shown in fig. 10, optionally, when the privacy film layer 14 is disposed on a side of the array substrate 11 close to the first polarizer 15, the privacy film layer 14 may be disposed between the color film substrate 13 and the first polarizer 15.
As shown in fig. 11, optionally, the first polarizer 15 may include an adhesive layer 151, a first protective film layer 152, a polarizing layer 153, a second protective film layer 154, and a protective film layer 155, which are sequentially disposed along a direction away from the color film substrate 13, and when the peep-proof film layer 14 is disposed at a designated position of the first polarizer 15, where the position of the designated position can adjust the phase retardation of the non-axial light passing through the peep-proof film layer 14, the designated position may include a position between the adhesive layer 151 and the first protective film layer 152.
Optionally, the adhesive layer 151 may include a release film 1511 and an adhesive layer 1512 sequentially disposed along a direction away from the color filter substrate 13.
Alternatively, the polarizing layer 153 may be made of a polyvinyl alcohol (PVA) material.
Alternatively, the first and second protective film layers 152 and 154 may use triacetyl cellulose film (TAC).
As shown in fig. 12 to fig. 15, in the embodiment, the liquid crystal panel may further include a first alignment film 18 and a second alignment film 19 that are oppositely disposed, the first alignment film 18 is disposed between the liquid crystal layer 12 and the color film substrate 13, the second alignment film 19 is disposed between the liquid crystal layer 12 and the array substrate 11, an alignment direction N of the first alignment film 18 is perpendicular to the light absorption axis M of the first polarizer 15, and an alignment direction Y of the second alignment film 19 is parallel to the light absorption axis X of the second polarizer 16.
Specifically, the alignment film is to align the liquid crystal molecules 121 in the liquid crystal layer 12 in a desired direction, and the alignment direction of the alignment film determines the alignment direction of the liquid crystal molecules 121 in the liquid crystal layer 12, and the alignment direction of the liquid crystal molecules 121 in the liquid crystal layer 12 can be adjusted by adjusting the alignment direction of the alignment film. Since the privacy protection film layer 14 is disposed in the liquid crystal panel provided in this embodiment, a privacy protection effect can be achieved, and then the alignment direction of the alignment film is adjusted to adjust the arrangement direction of the liquid crystal molecules 121 in the liquid crystal layer 12, so that the position where the light emitted from the liquid crystal panel in the non-axial direction increases can be adjusted, and the position where the contrast of the content displayed on the display device provided with the liquid crystal panel provided in this embodiment in the non-axial direction decreases can be adjusted, so that the display device can be observed from a specific non-axial position of the display device, and the content displayed on the display device cannot be clearly observed, thereby improving the pertinence of the privacy protection effect and improving the practicability of the privacy protection effect.
As shown in fig. 12 and 13, optionally, an angle between the light absorption axis M of the first polarizer 15 and the transverse direction of the liquid crystal panel is 0 °, and an angle between the light absorption axis X of the second polarizer 16 and the transverse direction of the liquid crystal panel is 90 °. At this time, an angle between the alignment direction N of the first alignment film 18 and the transverse direction of the liquid crystal panel is also 90 °, that is, the angle is perpendicular to the light absorption axis M of the first polarizer 15, and an angle between the alignment direction Y of the second alignment film 19 and the transverse direction of the liquid crystal panel is 90 °, that is, the angle is parallel to the light absorption axis X of the second polarizer 16.
In this case, as shown in fig. 16, the simulation effect of the light leakage amount of the liquid crystal panel in the large-angle oblique viewing angle direction can be shown in the horizontal direction, the horizontal direction can be shown in the left and right sides of the user of the display device, the vertical direction can be shown in the front and back sides of the user of the display device, taking the horizontal direction and the right side as 0 ° and increasing the angle counterclockwise as an example, the position where the non-axial light leakage amount of the liquid crystal panel increases is located in the shadow range of 15 ° to 75 ° in the front right, in the shadow range of 105 ° to 165 ° in the front left, in the shadow range of 195 ° to 255 ° in the back left, and in the shadow range of 285 ° to 345 ° in the back right, so that other people located in the above-mentioned angle range with respect.
As shown in fig. 14 and fig. 15, optionally, an angle between the light absorption axis M of the first polarizer 15 and the transverse direction of the liquid crystal panel is 135 °, and an angle between the light absorption axis X of the second polarizer 16 and the transverse direction of the liquid crystal panel is 45 °. At this time, an angle between the alignment direction N of the first alignment film 18 and the transverse direction of the liquid crystal panel is also 45 °, that is, perpendicular to the light absorption axis M of the first polarizer 15, and an angle between the alignment direction Y of the second alignment film 19 and the transverse direction of the liquid crystal panel is 45 °, that is, parallel to the light absorption axis X of the second polarizer 16.
In this case, as shown in fig. 17, the simulation effect of the light leakage amount of the liquid crystal panel in the large-angle oblique viewing angle direction can be represented by the horizontal direction of the left and right sides of the user of the display device, the vertical direction of the left and right sides of the user of the display device, taking the horizontal direction of 0 ° and the counterclockwise increase of the angle as an example, the positions where the non-axial light leakage amount of the liquid crystal panel increases are respectively located in the shadow range of 60 ° to 120 ° right in front, in the shadow range of 150 ° to 210 ° right in the left direction, in the shadow range of 240 ° to 300 ° right in the back, and in the shadow range of 330 ° to 30 ° right in the right direction, so that other people located in the above-mentioned angle range with respect to the user of the display device can not clearly observe the contents displayed on the.
As shown in fig. 18 and fig. 19, in this embodiment, the liquid crystal panel further includes a compensation film layer 17, the compensation film layer 17 is disposed on a side of the array substrate 11 close to the color filter substrate 13, an optical axis direction of the compensation film layer 17 is parallel to an initial optical axis direction of liquid crystal molecules 121 in the liquid crystal layer 12, a sum of a phase retardation of the compensation film layer 17 and a phase retardation of the liquid crystal layer 12 is an integral multiple of a wavelength of incident light, and is used to adjust phase retardations of the incident light passing through the compensation film layer 17 and the liquid crystal layer 12 when the liquid crystal panel is subjected to an external force in a dark state, so as to reduce an amount of light leakage when the liquid crystal panel is subjected.
The compensation film layer 17 can compensate the phase delay of the light passing through the liquid crystal panel when the liquid crystal panel is subjected to an external force in a dark state, because the sum of the phase delay of the compensation film layer 17 and the phase delay of the liquid crystal layer 12 is an integral multiple of the wavelength of the incident light, when the polarization state of the incident light changes due to optical anisotropy generated under the condition that the array substrate 11 and the color film substrate 13 are subjected to an inhomogeneous external force, the phase delay of the polarized light passing through the liquid crystal layer 12 can be compensated, so that after the incident light passes through the array substrate 11, the liquid crystal layer 12, the color film substrate 13, the peep-proof film layer 14 and the compensation film layer 17, the total phase delay is close to or equal to the integral multiple of the wavelength of the light, the incident light can be restored to the original polarization state to a certain extent, that is, the polarization state of the incident light is in a linear polarization state, so that when the display device is in a dark state, therefore, the problem of light leakage of the liquid crystal panel and the display device when external force is applied to the liquid crystal panel and the display device in a dark state is solved.
Optionally, the compensation film layer 17 may include a + a compensation film layer 17.
As shown in fig. 18 and 19, optionally, the compensation film layer 17 may be disposed between the color filter substrate 13 and the liquid crystal layer 12. However, the position where the compensation film 17 is disposed is not limited thereto. In addition, in the liquid crystal panel provided with the compensation film layer 17, the position of the peep prevention film layer 14 is not limited to the two positions shown in fig. 18 and 19, and may be provided at a position in the liquid crystal panel when the compensation film layer 17 is not provided (as shown in fig. 7 to 11).
In the present embodiment, the sum of the retardation of the privacy film layer 14, the retardation of the compensation film layer 17, and the retardation of the liquid crystal layer 12 is a predetermined range, and the predetermined range satisfies the condition that the transmittance of blue light in the incident light is greater than the transmittance of red light and green light. The design can make the blue light quantity in the leakage light of the liquid crystal panel larger than the red light quantity and the green light quantity, and the human eye is most insensitive to the blue light, so the problem of color cast of the leakage light of the liquid crystal panel can be improved.
As shown in fig. 20 and 21, the color coordinates of the light leakage of the liquid crystal panel according to the prior art and the liquid crystal panel according to the present embodiment are shown, in the color coordinates diagram, the upper shaded portion is a green light region, the lower left shaded portion is a blue light region, the lower right shaded portion is a red light region, and the adjacent regions of three colors or two adjacent colors are the colors formed by three colors or two colors in combination. As shown in fig. 20, in the color coordinates of the prior art liquid crystal panel, the color appears in the blue light region, and in the adjacent region of the green light region and the red light region, the yellow light appears in the adjacent region of the green light and the red light, and therefore, the leakage light of the prior art liquid crystal panel appears in both yellow and blue colors, thereby causing color shift. As shown in fig. 21, in the color coordinates of the liquid crystal panel provided in this embodiment, the colors are all concentrated in the blue light region, so that the light leakage of the liquid crystal panel provided in this embodiment only presents one color of blue, thereby improving the problem of color cast of the light leakage of the liquid crystal panel.
Optionally, the predetermined range is 570nm-650 nm.
As another technical solution, this embodiment further provides a display device, including the liquid crystal panel provided in this embodiment.
The display device provided by the embodiment of the invention can realize the peep-proof effect by virtue of the liquid crystal panel provided by the invention.
In summary, the liquid crystal panel and the display device provided in this embodiment can achieve the anti-peeping effect.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The liquid crystal display panel is characterized by further comprising an anti-peeping film layer, wherein the anti-peeping film layer is arranged on one side, close to the color film substrate, of the array substrate and used for adjusting the phase delay of non-axial light rays penetrating through the anti-peeping film layer so as to improve the light leakage quantity of the non-axial light rays.
2. The liquid crystal panel of claim 1, wherein the privacy film layer comprises a + C privacy film layer, a-C privacy film layer, or a + AC privacy film layer.
3. The liquid crystal panel according to claim 1, wherein the privacy film layer is disposed between the array substrate and the liquid crystal layer, or disposed between the color film substrate and the liquid crystal layer.
4. The liquid crystal panel according to claim 1, wherein the color film substrate comprises a substrate and a color film layer disposed on a side of the substrate facing the liquid crystal layer, or disposed between the color film layer and the substrate.
5. The liquid crystal panel according to claim 1, further comprising a first polarizer and a second polarizer, wherein the first polarizer is disposed on a side of the color film substrate away from the liquid crystal layer, the second polarizer is disposed on a side of the array substrate away from the liquid crystal layer, and a light transmission axis of the first polarizer is perpendicular to a light transmission axis of the second polarizer;
the peep-proof film layer is arranged on one side, close to the first polarizer, of the array substrate, or is arranged in a specified position, capable of adjusting the phase delay of the non-axial light passing through the peep-proof film layer, of the first polarizer in a built-in mode.
6. The liquid crystal panel according to claim 5, wherein the privacy film layer is disposed between the color film substrate and the first polarizer.
7. The liquid crystal panel according to claim 5, wherein the first polarizer comprises an adhesive layer, a first protective film layer, a polarizing layer, a second protective film layer, and a protective film layer, which are sequentially disposed in a direction away from the color film substrate, and the designated position comprises a position between the adhesive layer and the first protective film layer.
8. The liquid crystal panel according to claim 5, further comprising a first alignment film and a second alignment film disposed opposite to each other, wherein the first alignment film is disposed between the liquid crystal layer and the color film substrate, the second alignment film is disposed between the liquid crystal layer and the array substrate, an alignment direction of the first alignment film is perpendicular to a light absorption axis of the first polarizer, and an alignment direction of the second alignment film is parallel to a light absorption axis of the second polarizer.
9. The liquid crystal panel according to claim 1, further comprising a compensation film layer disposed on a side of the array substrate close to the color filter substrate, wherein an optical axis direction of the compensation film layer is parallel to an initial optical axis direction of liquid crystal molecules in the liquid crystal layer, and a sum of a phase retardation of the compensation film layer and a phase retardation of the liquid crystal layer is an integral multiple of a wavelength of an incident light, so as to adjust a phase retardation of the incident light passing through the compensation film layer and the liquid crystal layer when the liquid crystal panel is under an external force in a dark state, so as to reduce a light leakage amount of the incident light when the liquid crystal panel is under an external force in a dark state.
10. A display device comprising the liquid crystal panel according to any one of claims 1 to 9.
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