CN117518545A - Polarizing component and display device - Google Patents
Polarizing component and display device Download PDFInfo
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- CN117518545A CN117518545A CN202311649061.6A CN202311649061A CN117518545A CN 117518545 A CN117518545 A CN 117518545A CN 202311649061 A CN202311649061 A CN 202311649061A CN 117518545 A CN117518545 A CN 117518545A
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Classifications
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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
- G02F1/1323—Arrangements for providing a switchable viewing angle
-
- 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
- G02F1/133504—Diffusing, scattering, diffracting elements
- G02F1/133507—Films for enhancing the luminance
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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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Polarising Elements (AREA)
Abstract
The application discloses polarizing component and display device, polarizing component includes: a polarizing film layer; the peep-proof functional layer is positioned at one side of the polarizing film layer; in the first direction, the peep-proof functional layer comprises a plurality of retaining walls which are sequentially arranged; a light-transmitting layer is arranged between adjacent retaining walls; the first direction is parallel to the plane where the polarizing film layer is located. According to the technical scheme, the peep-proof functional layer is added in the polarizing component and comprises a plurality of retaining walls which are sequentially arranged, and a light-transmitting layer is arranged between every two adjacent retaining walls. The light-polarizing component can limit the light emergent angle based on the retaining wall in the peep-proof functional layer, so that the display equipment with the light-polarizing component has a required display view angle, and the peep-proof display function is realized.
Description
Technical Field
The application relates to the technical field of display, in particular to a polarizing component and display equipment.
Background
Along with the development of science and technology, more and more display devices are widely applied to daily life and work of people, bring great convenience to daily life and work of people, and become an indispensable important tool for people at present.
Currently, most display devices do not have a peep-proof function, and users have a strong demand for adding the peep-proof function to the display devices. How to realize the peep-proof display function of the display device becomes a problem to be solved in the technical field of display.
Disclosure of Invention
In view of this, the present application provides a polarizing component and a display device, and the scheme is as follows:
in one aspect, the present application provides a polarizing assembly comprising:
a polarizing film layer;
the peep-proof functional layer is positioned at one side of the polarizing film layer;
in the first direction, the peep-proof functional layer comprises a plurality of retaining walls which are sequentially arranged; a light-transmitting layer is arranged between adjacent retaining walls; the first direction is parallel to the plane where the polarizing film layer is located.
Another aspect of the present application also provides a display device including the above polarizing assembly.
In the polarization subassembly and the display device that this application technical scheme provided, increase peep-proof functional layer in polarization subassembly, peep-proof functional layer includes a plurality of barricades that set gradually, has the printing opacity layer between the adjacent barricade. The light-polarizing component can limit the light emergent angle based on the retaining wall in the peep-proof functional layer, so that the display equipment with the light-polarizing component has a required display view angle, and the peep-proof display function is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the provided drawings without inventive effort to those skilled in the art.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and should not be construed as limiting the scope of the invention, since any structural modifications, proportional changes, or dimensional adjustments, which may be made by those skilled in the art, should not be construed as limiting the scope of the invention without affecting the efficacy or the achievement of the objective of the invention.
FIG. 1 is a partial cut-away view of a polarizer assembly according to an embodiment of the present disclosure;
fig. 2 is a top view of a peep-proof functional layer according to the embodiment of the present application;
fig. 3 is a top view of another peep-proof functional layer according to an embodiment of the present disclosure;
fig. 4 is a top view of still another peep-proof functional layer according to an embodiment of the present disclosure;
fig. 5 is a top view of still another peep-proof functional layer according to an embodiment of the present disclosure;
fig. 6 is a sectional view of a peep-proof functional layer according to an embodiment of the present application;
fig. 7 is a schematic diagram of the peep-proof function layer shown in fig. 6 to implement the peep-proof function;
fig. 8 is a cross-sectional view of another peep-proof functional layer according to an embodiment of the present disclosure;
FIG. 9 is a partial cut-away view of another polarizing component according to an embodiment of the present disclosure;
FIG. 10 is a partial cut-away view of yet another polarizing component according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a polarizing component according to an embodiment of the present application;
FIG. 12 is a schematic structural diagram of another polarizer assembly according to an embodiment of the present disclosure;
FIG. 13 is a schematic structural diagram of another polarizer assembly according to an embodiment of the present disclosure;
FIG. 14 is a schematic structural diagram of a polarizing component according to an embodiment of the present disclosure;
FIG. 15 is a schematic view of a partial structure of a polarizing assembly according to an embodiment of the present disclosure;
FIG. 16 is a schematic view of a partial structure of a polarizing assembly according to an embodiment of the present disclosure;
fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which it is shown, and in which it is evident that the embodiments described are exemplary only some, and not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Referring to fig. 1, fig. 1 is a partial cut-away view of a polarizing assembly according to an embodiment of the present application, where the polarizing assembly includes:
a polarizing film layer 11;
a peep-proof functional layer 12 positioned at one side of the polarizing film layer 11;
in the first direction F1, the peep-proof functional layer 12 includes a plurality of retaining walls 121 that are sequentially arranged; a light-transmitting layer 122 is arranged between the adjacent retaining walls 121; the first direction F1 is parallel to the plane of the polarizing film layer 11.
In the polarizing component provided in this embodiment, the peep-proof functional layer 12 has a plurality of retaining walls 121 arranged on one side in the first direction F1, and the light incident on the polarizing component propagates based on the light-transmitting layer 122 between the adjacent retaining walls 121, so as to define the transmission direction and the transmission angle of the outgoing light passing through the polarizing component, so that the display device having the polarizing component has the peep-proof function.
In addition, the polarizing component provided by the embodiment of the application integrates the polarizing film layer 11 and the peep-proof functional layer 12 into a whole, which is equivalent to a polarizer with the peep-proof function, improves the integration level of equipment and is convenient for realizing the light and thin design of the equipment.
The retaining wall 121 is a black light absorbing structure, and light incident on the retaining wall 121 can be absorbed. Alternatively, the retaining wall 121 may be a patterned glue layer mixed with a black additive. The black additive may be carbon powder or other black material powder.
Referring to fig. 2, fig. 2 is a top view of an anti-peeping functional layer according to an embodiment of the present application, and, as shown in fig. 1 and fig. 2, the extending direction of the retaining wall 121 is a second direction F2; the second direction F2 is parallel to the plane of the polarizing film layer 11; the included angle theta between the second direction F2 and the first direction F1 is not smaller than 75 degrees and not larger than 105 degrees. In the embodiment shown in fig. 2, the included angle θ=75° is illustrated as an example.
Referring to fig. 3, fig. 3 is a top view of another peep-proof functional layer according to an embodiment of the present application, in this manner, an included angle θ=105° is taken as an example for illustration.
The retaining wall 121 has a first vertical projection on the plane of the polarizing film 11. In the manner shown in fig. 2 and 3, the first vertical projection is illustrated as a straight line segment.
In one implementation of the embodiment of the present application, as shown in fig. 2 and 3, the first vertical projection may be set to be a straight line segment extending along the second direction F2; the retaining walls 121 are sequentially arranged at equal intervals in the first direction F1; the second direction F2 is parallel to the plane of the polarizing film layer 11. In this manner, the plurality of retaining walls 121 are disposed at equal intervals in the first direction F1, so that the retaining walls 121 are convenient to prepare, and the manufacturing process of the polarizing component is simple and the manufacturing cost is low.
In other ways, the first vertical projection may also be a non-straight line segment as shown in fig. 4 and 5.
Referring to fig. 4, fig. 4 is a top view of still another peep-proof functional layer according to an embodiment of the present application, in this manner, an included angle θ=75°, and a first vertical projection is illustrated as a folded segment.
Referring to fig. 5, fig. 5 is a top view of still another peep-proof functional layer according to an embodiment of the present application, in this manner, an included angle θ=105°, and a first vertical projection is illustrated as a folded segment.
In the embodiment of the application, θ is not less than 75 ° and not more than 105 °, θ may be any angle not less than 75 ° and not more than 105 °, and θ is not limited to 75 ° or 105 °. When the polarizing assembly is used in a display device, the shape of the polarizing assembly is adapted to the display device. Taking the polarizing component as a rectangle as an example, the rectangle includes: a first side and a second side that are relatively parallel; third and fourth sides, which are relatively parallel. In the manner shown in fig. 2-5, the upper and lower sides of the rectangle are the first and second sides, respectively, and the left and right sides are the third and fourth sides, respectively.
Both the first and second sides are parallel to the first direction F1. Both the third side and the fourth side handle the first direction F1. The third side and the fourth side correspond to the left side and the right side of the display device, respectively. When a user holds the display device to watch the display image, the light quantity of the display light at the left side and the right side of the display device with large visual angles can be effectively shielded due to the fact that theta is more than or equal to 75 degrees and less than or equal to 105 degrees, and therefore other people on the left side and the right side of the display device are effectively prevented from peeping the display content.
Taking a mobile phone as an example, in the manner shown in fig. 2-5, the left side and the right side of the peep-proof functional layer 12 are respectively corresponding to the left side and the right side of the mobile phone. Because θ is greater than or equal to 75 degrees and less than or equal to 105 degrees, the included angle between the extending direction of the retaining wall 121 and the straight line where the left side edge or the right side edge of the mobile phone is located is not more than 15 degrees, and the extending direction of the retaining wall 121 is more approximate to the straight line where the left side edge or the right side edge of the mobile phone is located. Thus, the light is limited by the retaining wall 121, and cannot be emitted towards the left side and the right side of the mobile phone at a large angle, and other people on the left side or the right side of the mobile phone user are limited by the limitation of the light angle of the retaining wall 121, so that the image displayed by the mobile phone cannot be seen. And there is a distance between the mobile phone and human eyes, which makes the light with the visual angle range of the user within 15 degrees effectively received by human eyes, but not the user can not effectively watch the image displayed by the mobile phone. It should be noted that, in the embodiment of the present application, the range of the included angle between the second direction F2 and the first direction F1 may be set based on the peep-proof requirement, and is not limited to 75 ° or more and θ or less than 105 °.
In one implementation of the embodiment of the present application, as shown in fig. 4 and 5, the first vertical projection may be set to be a non-linear segment along the second direction F2. The non-linear segment is a broken line or a curved line extending in the second direction F2 in a non-periodic manner. The first vertical projection is set to be a nonlinear segment, so that the distance between the retaining walls 121 can be randomly distributed, different positions of the same first vertical projection in the second direction F2 can be randomly distributed with included angles of the first direction F1, and the problem of moire caused by a periodic structure is avoided.
When the first vertical projection is a non-linear segment, the maximum width Wmax between two adjacent retaining walls 121 is Wmin, and the minimum width Wmax-Wmin is less than or equal to 40% W 0 That is, the average variation of the spacing between adjacent retaining walls 121 is 20% w 0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein W is 0 For the average distance between two adjacent retaining walls 121, for the retaining walls 121 with non-straight line segments, along the second direction F2, the distance between the retaining walls 121 is set based on W 0 Random variation, avoiding moire problems caused by periodic structures where all retaining walls 121 are at the same pitch.
Can be based on W given by 0 In the second direction F2, the spacing between two adjacent retaining walls 121 is set to be less than or equal to 40% W based on Wmax-Wmin 0 Randomly distributed, and can effectively prevent the problem of moire while ensuring the peep-proof effect.
When the first vertical projection is a straight line segment, the non-straight line segment comprises a plurality of first line segments connected with each other; for the same first vertical projection, the included angle Δθ between the first line segment and the second direction F2 is not greater than 10 °. For a first perpendicular projection of a non-straight segment, the first perpendicular projection has a plurality of peaks and valleys alternately distributed along the second direction F2. For a given included angle theta, along the second direction F2, the maximum included angle theta+delta theta between the first vertical projection and the first direction F1 at different positions is theta-delta theta, and the minimum included angle theta between the first vertical projection and the first direction F1 at different positions is theta-delta theta, wherein 0 DEG < deltatheta is less than or equal to 10 deg. The value of Δθ may be set based on demand. For the same retaining wall 121 with a nonlinear segment, based on a given angle θ, the included angle θ is set along the second direction F2 to be randomly changed based on θ+Δθ, so that the problem of moire caused by a periodic structure that all retaining walls 121 adopt the same included angle θ is avoided.
The angle of 0 DEG < Deltaθis less than or equal to 10 DEG, so that the Deltaθ is randomly set with smaller change, and the problem that smaller folding angles are generated between two adjacent first line ends due to overlarge Deltaθ is avoided, so that the difficulty of the manufacturing process of the retaining wall 121 is improved.
Optionally, for the nonlinear segment, the nonlinear segment includes a plurality of first line segments connected to each other; for the same first vertical projection, at least two first line segments have different lengths, and/or at least two first line segments have different included angles with the second direction F2. For the same first vertical projection, the random distribution of the distance between the two adjacent retaining walls 121 and the random distribution of the included angle theta are realized by setting the random distribution of the lengths of the first line segments and/or the random distribution of the included angles between the two adjacent first line segments and the second direction F2, so that the problem of moire is prevented.
When the first vertical projection is a straight line segment, the spacing between two adjacent retaining walls 121 in the second direction F2 is W 0 . When the first vertical projection is a non-linear structure, the average distance between two adjacent retaining walls 121 is W 0 In the second direction F2, the spacing between two adjacent retaining walls 121 is based on W 0 Randomly. In the embodiment of the application, W can be set based on requirements 0 Is a value of (a). W (W) 0 The range of the value of (2) is 10-100 mu m.
Referring to fig. 6 and fig. 7, fig. 6 is a cross-sectional view of a peep-proof functional layer according to an embodiment of the present application, and fig. 7 is a schematic diagram illustrating a principle of the peep-proof functional layer shown in fig. 6 to implement a peep-proof function. In which an enlarged view of a partial region in fig. 6 is illustrated in fig. 7 for the sake of clarity of illustration of the light propagation direction. In the first direction F1, the light-transmitting layer 122 between adjacent retaining walls 121 includes: the first light-transmitting film layers 21 are oppositely arranged, and the second light-transmitting film layers 22 are arranged between the first light-transmitting film layers 21, wherein the refractive index of the first light-transmitting film layers 21 is smaller than that of the second light-transmitting film layers 22. The refractive index of the first light-transmitting film layer 21 is set to n 1 The refractive index 22 of the second transparent film layer is n 2 ，n 1 ＜n 2 。
The arrows inside the peep-proof functional layer 12 are used for indicating the light transmission directionTo (c). Due to n 1 ＜n 2 The second light-transmitting film layer 22 is an optically dense medium, and the first light-transmitting film layer 21 is an optically sparse medium. In the manner shown in FIGS. 6 and 7, due to n 1 ＜n 2 The light incident on the second light-transmitting film layer 22 at a large angle can pass through the interface between the second light-transmitting film layer 22 and the first light-transmitting film layer 21 based on the principle of total reflection of light, is incident on the retaining wall 121 and absorbed by the retaining wall, and the light incident on the second light-transmitting film layer 22 at a small angle is totally reflected at the interface between the second light-transmitting film layer 22 and the first light-transmitting film layer 21, so that the light can exit from the other side of the second light-transmitting film layer 22, the control of the exit angle of the transmitted light of the polarizing component is realized, and the polarizing component has the peep-proof function. As shown in fig. 7, the incident angle b is larger than the incident angle a for the light incident on the second light-transmitting film layer 22. And b and d are complementary angles to each other, and a and c are complementary angles to each other, so c is greater than d. Therefore, when c satisfies the total reflection condition and d does not satisfy the total reflection condition, the incident angle a is a small angle incidence and the incident angle b is a large angle incidence for the light incident on the second light-transmitting film layer 22.
Compared with the light-transmitting layer 122 with a single refractive index between the two retaining walls 121, in the modes shown in fig. 6 and 7, the peep-proof function is realized based on total reflection, so that light rays with total reflection can smoothly pass through the peep-proof function layer 12, higher light transmittance is ensured, and meanwhile, the view angle convergence function can be realized.
For the light incident from one side of the second light-transmitting film layer 22, when the light is transmitted from the second light-transmitting film layer 22 to the first light-transmitting film layer 21, at the interface position of the second light-transmitting film layer 22 and the first light-transmitting film layer 21, if the incident angle c is not smaller than the critical angle of total reflection, total reflection can be generated at the interface, so that the light is transmitted only in the second light-transmitting film layer 22, and finally exits from the other side of the second light-transmitting film layer 22; at the interface between the second light-transmitting film layer 22 and the first light-transmitting film layer 21, if the incident angle d is smaller than the critical angle for total reflection, the light will pass through the interface, and thus be incident on the surface of the retaining wall 121, and the light will be absorbed by the retaining wall 121.
As described above, the refractive index of the first light-transmitting film layer 21 is set to n 1 The refractive index of the second transparent film 22 is n 2 . For a first light-transmitting film layer 21 and a second light-transmitting film layer 22 of a given material, the refractive indices of both are constant, i.e. n 1 And n 2 Can be determined based on the light transmissive material employed. Setting the critical angle of total reflection corresponding to the second light-transmitting film layer 22 and the first light-transmitting film layer 21 as C, there are:
as shown in fig. 7, the incident angle of the light incident from the side of the second light-transmitting film 22 is set to be a, the incident angle of the light incident to the interface of the second light-transmitting film layer 22 and the first light-transmitting film layer 21 is set to be c, and a and c satisfy the following relationship:
a+c＝90° (2)
if the angle of incidence c of the light at the interface is such that total reflection can occur, then it is necessary to satisfy:
in the embodiment of the present application, the total reflection critical angle C is set to satisfy the following relationship:
based on the above-mentioned relational expressions (1) to (4), a is found to be 45 °.
Similarly, if the incident angle d of the light at the interface is smaller than the critical angle C of total reflection, then:
since b+d=90°, b > 45 °, when the incident angle b is greater than 45 °, the light incident from the second light-transmitting film 22 side can pass through the interface between the second light-transmitting film 22 and the first light-transmitting film 21, and is incident on the surface of the retaining wall 121 and absorbed by the retaining wall.
As can be seen from the above description, in the embodiment of the present application, by selecting the light-transmitting material with a suitable refractive index, the light incident from one side of the second light-transmitting film layer 22 can be incident from one side of the second light-transmitting film layer 22 based on total reflection when the incident angle a is smaller than 45 ° and exit from the other side of the second light-transmitting film layer 22, and the light does not satisfy the total reflection condition when the incident angle b is larger than 45 °, so that the light can be incident on the surface of the retaining wall 121 and absorbed by the retaining wall.
Preferably, the refractive index of the two light-transmitting film layers can be set so that a is less than or equal to 35 degrees. The first light-transmitting film layer 21 and the second light-transmitting film layer 22 can be prepared by selecting light-transmitting materials with different refractive indexes based on requirements so as to set the viewing angle range of the emergent light rays of the polarizing component.
In one implementation of the embodiment of the present application, the width of the first light-transmitting film layer 21 is set to W in the first direction F1 1 The width of the second transparent film 22 is W 2 The width of the retaining wall 121 is W 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein W is 2 ＞W 3 ＞W 1 . The second light-transmitting film layer 22 is a light-transmitting window of the polarizer, and the width W of the second light-transmitting film layer 22 is set 2 Maximally, so as to ensure the uniformity and brightness of the emergent light of the polarizing component on the emergent side. The first transparent film 21 has no light transmission requirement, and can reduce its thickness as much as possible to ensure the uniformity and brightness of the outgoing light of the polarizing component on the light outgoing side.
Referring to fig. 8, fig. 8 is a cross-sectional view of another peep-proof functional layer according to an embodiment of the present application, in which the light-transmitting layer 122 between two adjacent retaining walls is made of a single refractive index material. In this manner, the light incident from one side of the light-transmitting layer 122 is shown by the dotted arrow in fig. 8, and if the incident angle is small, the light can exit from the other side of the light-transmitting layer 122, and if the incident angle is large, the light will be incident on the surface of the retaining wall 121 and thus absorbed by the retaining wall 121. The polarizing component shown in fig. 8 is a shutter structure, and by setting design parameters of the retaining wall and the light-transmitting layer 122 in the polarizing component, for the light incident from one side of the light-transmitting layer 122, the light with an incident angle smaller than the set angle can pass through the peep-proof functional layer 12, and the light with an incident angle greater than or equal to the set angle is absorbed by the retaining wall 121, so as to control the emergent angle of the transmitted light of the polarizing component, and the polarizing component has the peep-proof function.
It should be noted that, in the embodiment of the present application, the retaining wall 121 and the light-transmitting layer 122 have the same height, and the surfaces of the two layers are flush. So as to facilitate the lamination and fixation of the polarized light component and other structures.
In the manner shown in fig. 8, the first vertical projection may be a straight line segment or a non-straight line segment. Setting the height of the retaining wall 121 to be H; in the first direction F1, the average spacing between the retaining walls 121 is W 0 The average width of the retaining wall 121 is D; wherein H/P is more than or equal to 1:1; p=w 0 +d. The H/P is set to be more than or equal to 1:1, and the peep prevention effect can be better. Preferably, H/P is more than or equal to 3:1. As shown by the broken line in fig. 8, the light incident on the light-transmitting layer 122 can pass through the light-transmitting layer 122 when the incident angle is smaller than e, and if the incident angle is not smaller than e, the light will be incident on the surface of the retaining wall 121 and absorbed by the retaining wall 121. H/P is inversely related to e, the smaller the H/P is, the larger the e is, the H/P is set to be more than or equal to 3:1, and the influence of excessive e on the peep prevention effect can be avoided.
In the embodiment of the application, W is set 0 /P≥60％，W 0 The range of the value is 10-100 μm, so as to realize better peep-proof effect.
Referring to fig. 9, fig. 9 is a partial sectional view of another polarizing assembly according to an embodiment of the present application, where, on the basis of any one of the above embodiments, the polarizing ratio assembly shown in fig. 9 further includes: the anti-reflection film 13, the polarizing film layer 11 and the peep-proof functional layer 12 are positioned on the same side of the anti-reflection film 13.
In the embodiment shown in fig. 9, the peep-proof functional layer 12 is illustrated as being located between the polarizing film layer 11 and the antireflection film 13.
Referring to fig. 10, fig. 10 is a partial sectional view of another polarizing assembly according to an embodiment of the present application, in which a polarizing film layer 11 is disposed between a peep-proof functional layer 12 and an anti-reflection film 13.
For the light rays entering the polarizing component, not only the large-angle incident light rays are absorbed by the retaining wall 121 based on the peep-proof requirement, but also the small-angle incident light rays which can pass through the polarizing component are absorbed by the polarizing component in a certain proportion due to the fact that the light rays are absorbed by the material of the light transmitting layer 12 in a certain proportion, so that the display brightness of the display device is affected. In this embodiment of the present application, by adding the antireflection film 13 in the polarizing component, the transmittance of the light incident at a small angle can be ensured, and the display brightness of the display device can be improved.
The antireflection film 13 is an advanced polarizing film (Advanced Polarizer Film, APF for short), which can effectively improve the brightness of the polarizing component. The APF is arranged in the polarizing component, so that the absorptive polaroid (the polarizing film layer 11), the peep-proof functional film layer 12 and the APF are integrated, the peep-proof function is realized, the gain effect of the APF on the light output quantity is increased, and the highlighting is realized. The problem of moire can also be avoided by the random distribution of the pattern structure of the privacy function layer 12 as described above.
In this embodiment, the antireflection film 13 is located on the light incident side of the peep-proof functional layer 12. When the antireflection film 13 is APF, P light can be transmitted and S light can be reflected. When the S light reflected by the antireflection film 13 is reflected again to the polarizing component by other structures below the polarizing component, the S light is converted into P light and emitted from the polarizing component, so that the light transmittance is improved and the display brightness is increased. The antireflection film 13 is arranged on the light incident side of the peep-proof functional layer 12, so that the S light reflected by the antireflection film 13 can be prevented from passing through the peep-proof functional layer 12 for multiple times and being absorbed by the peep-proof functional layer 12 for multiple times, and the problem of display brightness reduction caused by the multiple absorption can be avoided. Wherein, the P light and the S light are linear polarized light with the polarization direction perpendicular to each other.
The polarizing film layer 11 is typically an organic material, such as a polyvinyl alcohol film (PVA). In order to avoid the organic material from being corroded by water vapor, on the basis of the mode shown in fig. 9 or fig. 10, the polarizing assembly provided in the embodiment of the present application may further be provided with a first protective layer 31 and a second protective layer 32 respectively on two opposite sides of the polarizing film layer 11 as shown in fig. 11 to fig. 13. The first protective layer 31 and the second protective layer 32 are both triacetate cellulose (TAC) films.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a polarizing assembly according to an embodiment of the present application, where an antireflection film 13, a second protection layer 32, a peep-proof functional layer 12, a polarizing film layer 11 and a first protection layer 31 are sequentially stacked. A glue layer 33 is provided on a surface of the first protective layer 31 facing away from the polarizing film layer 11.
Referring to fig. 12, fig. 12 is a schematic structural diagram of another polarizing assembly according to an embodiment of the present application, in which an antireflection film 13, a second protective layer 32, a polarizing film layer 11, a first protective layer 31, and a peep-proof functional layer 12 are sequentially stacked. An adhesive layer 33 is disposed on a surface of the peep-proof functional layer 12 facing away from the first protective layer 31.
Referring to fig. 13, fig. 13 is a schematic structural diagram of another polarizing assembly according to an embodiment of the present application, where an antireflection film 13, a second protective layer 32, a polarizing film layer 11, a peep-proof functional layer 12, and a first protective layer 31 are sequentially stacked. An adhesive layer 33 is disposed on a surface of the first protective layer 31 facing away from the peep-proof functional layer 12.
Referring to fig. 14, fig. 14 is a schematic structural diagram of another polarizing assembly according to an embodiment of the present application, where an antireflection film 13, a peep-proof functional layer 12, a second protective layer 32, a polarizing film layer 11 and a first protective layer 31 are sequentially stacked. An adhesive layer 33 is disposed on a surface of the peep-proof functional layer 12 facing away from the first protective layer 31.
In the manner shown in fig. 11-12, the glue layer 33 is used for adhesively securing the polarizing assembly to other structures in the display device. The adhesive layer 33 may be a pressure sensitive adhesive (Pressure Sensitive Adhesive, PSA for short), which is sensitive to pressure, and can be fixed to other structures by pressure without using a solvent or other auxiliary means.
Referring to fig. 15, fig. 15 is a schematic partial structure diagram of another polarizing assembly according to an embodiment of the present application, where on the basis of any one of the above real-time modes, the polarizing assembly shown in fig. 15 is provided with a light homogenizing sheet 14 on the light emitting side of the peep-proof functional layer 12, so as to improve uniformity of outgoing light of the polarizing assembly.
On the light emitting side of the polarizing component, the light blocking wall 121 is an opaque structure 12, which results in weaker brightness of the area of the polarizing component corresponding to the light blocking wall 121, and affects the uniformity of the brightness on the light emitting side of the polarizing component. In the embodiment shown in fig. 15, the light-emitting uniformity of the polarizing element can be improved by providing the light-homogenizing sheet 14.
In one approach, the light homogenizing sheet 14 may be a glue layer mixed with scattering particles.
Alternatively, the structure of the light homogenizing sheet 14 may be as shown in fig. 16.
Referring to fig. 16, fig. 16 is a schematic partial structure of another polarizing assembly according to an embodiment of the present application, in which the light homogenizing sheet 14 includes a plurality of prisms 141 disposed opposite to the retaining walls 121 one by one; for the retaining wall 121 and the prism 141 which are oppositely arranged, the retaining wall 121 has a first vertical projection on the plane of the polarizing film 11, the prism 141 has a second vertical projection on the plane of the polarizing film 11, the first vertical projection is located in the second vertical projection, and the first projection is located between two opposite sides of the second projection in the first direction. In this way, the first vertical projection is located in the corresponding second vertical projection, and the edge of the first vertical projection has a gap with the edge of the second vertical projection, so that part of light emitted from the light-transmitting layer 122 can be converged above the retaining wall 121 based on the prism 141 to be emitted, thereby better reducing the brightness difference between the area of the light-transmitting layer 122 corresponding to the light-transmitting component and the area of the retaining wall 121 corresponding to the light-transmitting component, and improving the brightness uniformity of the light emitted from different areas of the light-transmitting component.
Based on the polarizing assembly provided by the embodiment, another embodiment of the present application further provides a display device, where the display device includes the polarizing assembly provided by the embodiment, and peep-proof display can be achieved based on the polarizing assembly.
Referring to fig. 17, fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present application, where the display device includes:
a backlight module 41;
a liquid crystal display module 42 located at the light emitting side of the backlight module 41;
an optical panel 43 located between the backlight module 41 and the liquid crystal display module 42, wherein the optical panel 43 can adjust the light transmission direction based on the control signal;
the polarizing component 44 is located between the optical panel 43 and the backlight module 41.
In this embodiment, the liquid crystal display module 42 includes a liquid crystal cell, and a first polarizer and a second polarizer disposed on opposite sides of a liquid crystal panel. A first polarizer may be disposed on a side surface of the liquid crystal panel facing away from the optical panel 43, and a second polarizer may be disposed on a side surface of the liquid crystal panel facing toward the optical panel 43.
The polarizing assembly 44 provided in any of the above embodiments may be employed in the display device shown in fig. 17 to implement a privacy display function.
The optical panel 43 may be a liquid crystal grating capable of adjusting the light transmission direction based on the control signal. Based on the input control signal, the optical panel 43 can maintain the transmission direction of the incident light or deflect the incident light. Thus, the display device of the embodiment of the application can have a peep-proof mode and a non-peep-proof mode.
In the peep-proof mode, the optical panel 43 does not change the transmission direction of the incident light. At this time, after the light passing through the polarizing component 44 enters the optical panel 43, the optical panel 43 does not change the transmission direction of the incident light, and the finally outgoing light of the display device is controlled by the polarizing component 44, so as to realize peep-proof display.
In the non-peep-proof mode, the optical panel 43 deflects the transmission direction of the incident light based on the control signal. At this time, after the light passing through the polarizing component 44 enters the optical panel 43, the optical panel 43 deflects the transmission direction of the incident light based on the control signal, thereby realizing non-peep-proof display. The optical panel 43 includes a liquid crystal layer, and the scattering performance of the liquid crystal layer in the optical panel 43 can be adjusted based on the control signal to realize switching between the peep-proof mode and the non-peep-proof mode. If the haze of the liquid crystal layer in the optical panel 43 is adjustable, when not energized, the liquid crystal material is in a disordered high haze state, and has high scattering capability, and the light emitted by the polarizing component 44 can be scattered, so that non-peeping display is realized; when the liquid crystal material is electrified, the liquid crystal material is in an orderly low-haze state, has low scattering capability, and can better maintain the emergent direction of the polarizing component 44, so that peep-proof display is realized.
In the display device provided by the embodiment of the application, the peep-proof mode or the non-peep-proof mode can be selected based on the use requirement, so that the display device is convenient for a user to use.
Further, as described in the above embodiment, the polarizing component 44 may be provided with the peep-preventing functional layer 12 and the brightness enhancement film 13, where the brightness enhancement film 13 is located on the side of the peep-preventing functional layer 12 facing the backlight module 41. As described above, when the antireflection film 13 is APF, P light can be transmitted and S light can be reflected. When the S light reflected by the antireflection film 13 is reflected again to the polarizing component 44 by the backlight module 41, the S light is converted into P light and emitted from the polarizing component 44, thereby improving the light transmittance and increasing the display brightness. The antireflection film 13 is arranged on the light incident side of the peep-proof functional layer 12, so that the S light reflected by the antireflection film 13 can be prevented from passing through the peep-proof functional layer 12 for multiple times and being absorbed by the peep-proof functional layer 12 for multiple times, and the problem of display brightness reduction caused by the multiple absorption can be avoided.
Based on the above description, the polarizing component 44 provided in the embodiment of the present application can display peep-proof display, and also can ensure the brightness gain of APF, and effectively improve the moire problem.
In the description of the present application, each embodiment is described in a progressive manner, or in parallel manner, or in a combination of progressive and parallel manners, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.
It is noted that in the description of the present application, it is to be understood that the drawings and descriptions of the embodiments are illustrative and not restrictive. Like reference numerals refer to like structures throughout the embodiments of the specification. In addition, the drawings may exaggerate the thicknesses of some layers, films, panels, regions, etc. for understanding and ease of description. It will also be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. In addition, "on …" refers to positioning an element on or under another element, but not essentially on the upper side of the other element according to the direction of gravity.
The terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the present application based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in an article or apparatus that comprises such element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (16)
1. A polarizing assembly, comprising:
a polarizing film layer;
the peep-proof functional layer is positioned at one side of the polarizing film layer;
in the first direction, the peep-proof functional layer comprises a plurality of retaining walls which are sequentially arranged; a light-transmitting layer is arranged between adjacent retaining walls; the first direction is parallel to the plane where the polarizing film layer is located.
2. The polarizing assembly according to claim 1, wherein the extension direction of the retaining wall is a second direction; the second direction is parallel to the plane where the polarizing film layer is located;
an included angle between the second direction and the first direction is not smaller than 75 degrees and not larger than 105 degrees.
3. The polarizing assembly of claim 1, wherein in the first direction, the light transmissive layer between adjacent ones of the retaining walls comprises:
the light-transmitting film comprises two layers of oppositely arranged first light-transmitting film layers and second light-transmitting film layers positioned between the first light-transmitting film layers, wherein the refractive index of the first light-transmitting film layers is smaller than that of the second light-transmitting film layers.
4. The polarizing assembly of claim 3, wherein the first light transmissive film layer has a refractive index n 1 The refractive index of the second light-transmitting film layer is n 2 ；
Wherein,
5. the polarizing assembly according to claim 3, wherein the width of the first light transmissive film layer in the first direction is W 1 The width of the second light-transmitting film layer is W 2 The width of the retaining wall is W 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein W is 2 ＞W 3 ＞W 1 。
6. The polarizing assembly of claim 1, wherein the retaining wall has a first vertical projection on a plane of the polarizing film layer, the first vertical projection being a straight line segment extending in a second direction; the retaining walls are sequentially arranged at equal intervals in the first direction; the second direction is parallel to the plane where the polarizing film layer is located.
7. The polarizing assembly of claim 1, wherein the retaining wall has a first perpendicular projection on a plane of the polarizing film layer, the first perpendicular projection being a non-linear segment extending along a second direction; the second direction is parallel to the plane where the polarizing film layer is located.
8. The polarizing assembly according to claim 7, wherein the maximum width between two adjacent retaining walls is Wmax, the minimum width is Wmin, wmax-Wmin is less than or equal to 40% w 0 ；
Wherein W is 0 And the value range of W is 10-100 mu m for the average distance between two adjacent retaining walls.
9. The polarizing assembly of claim 7, wherein the nonlinear segment comprises a plurality of first segments connected to one another;
and for the same first vertical projection, the included angle between the first line segment and the second direction is not more than 10 degrees.
10. The polarizing assembly of claim 7, wherein the nonlinear segment comprises a plurality of first segments connected to one another;
wherein, for the same first vertical projection, at least two first line segments have different lengths, and/or at least two first line segments have different included angles with the second direction.
11. The polarizing assembly of claim 1, wherein the light transmissive layer between two adjacent retaining walls is a single refractive index material.
12. The polarizing assembly of claim 11, wherein the heights of the retaining walls are all H;
in the first direction, the average distance between the retaining walls is W 0 The average width of the retaining wall is D;
wherein H/P is more than or equal to 1:1; p=w 0 +D。
13. The polarizing assembly of claim 1, further comprising: and the polarizing film layer and the peep-proof functional layer are positioned on the same side of the antireflection film.
14. The polarized light assembly of claim 1, wherein the retaining wall is a glue layer mixed with carbon powder.
15. A display device comprising a polarizing assembly according to any one of claims 1-14.
16. The display device according to claim 15, wherein the display device comprises:
a backlight module;
the liquid crystal display module is positioned on the light emitting side of the backlight module;
the optical panel is positioned between the backlight module and the liquid crystal display module and can adjust the light transmission direction based on a control signal;
the polarizing component is positioned between the optical panel and the backlight module; the polarizing component is provided with a peep-proof functional layer and a brightness enhancement film, and the brightness enhancement film is positioned on one side of the peep-proof functional layer facing the backlight module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311649061.6A CN117518545A (en) | 2023-12-01 | 2023-12-01 | Polarizing component and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311649061.6A CN117518545A (en) | 2023-12-01 | 2023-12-01 | Polarizing component and display device |
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| CN117518545A true CN117518545A (en) | 2024-02-06 |
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| CN202311649061.6A Pending CN117518545A (en) | 2023-12-01 | 2023-12-01 | Polarizing component and display device |
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