CN108873466B - View separating element and display device - Google Patents
View separating element and display device Download PDFInfo
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- CN108873466B CN108873466B CN201811051334.6A CN201811051334A CN108873466B CN 108873466 B CN108873466 B CN 108873466B CN 201811051334 A CN201811051334 A CN 201811051334A CN 108873466 B CN108873466 B CN 108873466B
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- 239000000758 substrate Substances 0.000 claims abstract description 64
- 239000000382 optic material Substances 0.000 claims abstract description 19
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- 239000010410 layer Substances 0.000 description 89
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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
- G02F1/133—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
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a view separating element, comprising: the first substrate comprises a first electrode layer, and the second substrate comprises a second electrode layer; the microstructure layer is arranged on the first substrate and comprises a plurality of columnar lenses which are arranged in parallel, and the surface of each columnar lens, which is far away from one side of the first substrate, comprises at least two planes which are sequentially connected, and arc surfaces which are respectively connected with the planes at the two sides; the alignment layer is arranged on the surface of one side of the microstructure layer away from the first substrate; the electro-optic material layer is arranged on the surface of one side, far away from the first substrate, of the alignment layer, and the second substrate is positioned on one side, far away from the first substrate, of the electro-optic material layer. The invention solves the problem of poor coating effect of alignment liquid on a plane with a larger slope on the polyhedral cylindrical lens, so that the alignment liquid can be uniformly formed when the alignment liquid is coated on the cylindrical lens, an alignment layer is effectively formed, and the alignment of liquid crystal and the display effect of a vision separation device are ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of stereoscopic display, in particular to a view separating element and a display device.
Background
With the continuous development of display technology, stereoscopic display is increasingly widely applied, and integration of naked eye stereoscopic display is started on more and more display screens. The basic principle of naked eye stereoscopic display is that two images with parallax information are seen by two eyes by utilizing methods of shielding, refracting and the like for guiding part of light, so that stereoscopic vision effect is generated. The vision separating element can be used for realizing three-dimensional display by using a columnar lens, two patterns with parallax information processed in a specific mode are respectively projected to left and right eyes of a person by utilizing the light splitting effect of the columnar lens, images are respectively formed on retina of the left and right eyes, and parallax information is obtained by processing of a brain system to form three-dimensional vision.
At present, a layer of UV resin with a columnar structure can be molded and cured on a transparent substrate to form a columnar lens structure, or the columnar lens structure can be manufactured on the same material directly by using an extrusion molding technology. Generally, the cylindrical lens comprises an arc cylindrical lens and a polyhedral cylindrical lens, wherein the arc cylindrical lens is developed and used for a relatively long time, and each process technology is mature; the problem that the absolute value of the slope of the plane is suddenly increased can occur in the polyhedral cylindrical lens, when the alignment liquid is sprayed on the plane with the larger absolute value of the slope of the polyhedral cylindrical lens by adopting an ink-jet type spraying process, the alignment liquid is not easy to coat on the plane, the coating effect is poor, the alignment film on the polyhedral cylindrical lens is uneven in film formation, even part of the area cannot be formed, poor alignment of liquid crystals on the alignment film further occurs, and the display effect is affected.
Disclosure of Invention
Therefore, the present invention is directed to a view separating device and a display device, so as to solve the problem that the alignment liquid coating effect is poor in the plane with the larger slope on the polygonal cylindrical lens.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a view separating element, including:
the device comprises a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first electrode layer, and the second substrate comprises a second electrode layer;
the microstructure layer is arranged on the first substrate and comprises a plurality of columnar lenses which are arranged in parallel, wherein in the arrangement direction of the columnar lenses, the surface of one side of each columnar lens far away from the first substrate comprises at least two planes which are sequentially connected, and arc surfaces which are respectively connected with the planes at the two sides;
the alignment layer is arranged on the surface of the microstructure layer, which is far away from one side of the first substrate;
the electro-optic material layer is arranged on the surface of the alignment layer, which is far away from one side of the first substrate, and the second substrate is positioned on one side of the electro-optic material layer, which is far away from the first substrate.
Optionally, the absolute value of the slope of the tangent plane corresponding to the end, connected with the plane, of the arc surface is smaller than or equal to the absolute value of the slope of the plane, connected with the arc surface.
Optionally, one end of the arc surface connected with the plane is tangent to the plane connected with the arc surface.
Optionally, the pattern of the lenticular lens on any cross section is an axisymmetric pattern, and the cross section is a cross section perpendicular to the extending direction of the lenticular lens.
Optionally, the pattern of the at least two planes on the cross section is at least two sides of a regular polygon.
Optionally, the regular polygon has at least fourteen sides.
Optionally, the number of the planes is 3.
Optionally, the lenticular lens is a lenticular convex lens or a lenticular concave lens.
Optionally, the electro-optic material layer has an ordinary refractive index and an extraordinary refractive index;
when the columnar lens is a columnar convex lens, the refractive index of the columnar lens is equal to the extraordinary light refractive index;
when the columnar lens is a columnar concave lens, the refractive index of the columnar lens is equal to the refractive index of the ordinary light.
In a second aspect, an embodiment of the present invention provides a display device, including a display module and the view separation element according to any one of the first aspect, where the view separation element is disposed on a light emitting surface of the display module.
The beneficial effects of the invention are as follows: according to the vision separating element provided by the invention, the microstructure layer formed by the plurality of parallel columnar lenses is arranged on one side of the first substrate, the surface of each columnar lens far away from one side of the first substrate comprises at least two planes which are sequentially connected and the circular arc surfaces which are respectively connected with the two most sides, then the alignment layer is arranged on the microstructure layer formed by the columnar lenses, the plane with larger absolute value of slope in the polyhedral cylindrical lens can be replaced by the circular arc surfaces, the problem that the coating effect of the alignment liquid is poor on the plane with larger slope on the polyhedral cylindrical lens is solved, so that the alignment layer can be uniformly formed when the alignment film is coated on the columnar lens, and further the alignment effect of liquid crystal and the display effect of the vision separating element are ensured.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:
FIG. 1 is a schematic view of a circular arc cylinder in a prior art view separating element;
FIG. 2 is a schematic view of a structure of a polygonal cylinder in a conventional view separating element;
FIG. 3 is a schematic view of a view separating element according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a cylindrical lens in the view separating element shown in FIG. 3;
FIG. 5 is a schematic cross-sectional view of a lenticular lens according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of another lenticular lens according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of yet another lenticular lens provided by an embodiment of the present invention;
FIG. 8 is a schematic view of another view separating element according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The conventional 2D/3D switchable view separating device generally includes an upper substrate, a lower substrate, a lenticular lens layer disposed between the upper and lower substrates, and a liquid crystal layer filled between the lenticular lens and the substrates, and an alignment layer is disposed on a surface of the lenticular lens layer contacting the liquid crystal layer to define an alignment of liquid crystal molecules in the liquid crystal layer. The vision separating element projects two patterns with parallax information processed in a specific mode into left and right eyes of a person respectively through the light splitting action of cylindrical lenses in a cylindrical lens layer, forms images on left and right retina of the person respectively, and obtains the parallax information through brain system processing to form stereoscopic vision. Fig. 1 is a schematic structural view of an arc-shaped cylindrical lens in a conventional view separation element, fig. 2 is a schematic structural view of a polyhedral cylindrical lens in a conventional view separation element, referring to fig. 1 and 2, generally, the structure of a cylindrical lens may be divided into two types, one type is an arc-shaped cylindrical lens structure, and the other type is a polyhedral cylindrical lens structure, in the process of preparing the view separation element, after the preparation of the cylindrical lens structure is completed, an alignment layer needs to be formed on a cylindrical lens layer, and specifically, a method for forming the alignment layer is as follows: and spraying an alignment liquid on the columnar lens layer by a spraying method, drying to form a film layer, and rolling and rubbing the film layer by friction cloth to form an alignment groove, thereby forming the alignment film. For the polyhedral column structure, taking the column shown in fig. 2 as an example, the planes at two sides are larger in absolute value of slope, when the ink-jet spraying process is adopted to spray the alignment liquid, the alignment liquid is easy to fall off from the plane with larger absolute value of slope, and is not easy to remain on the plane, so that the coating effect of the alignment liquid is poor, uneven film formation of an alignment film on the polyhedral column is caused, even partial areas cannot form films, and therefore the alignment of liquid crystal molecules at corresponding positions is out of control, and the problem of poor display effect caused by poor alignment of liquid crystal is generated.
Based on the above technical problems, an embodiment of the present invention provides a view separation element, fig. 3 is a schematic structural diagram of the view separation element provided by the embodiment of the present invention, fig. 4 is a schematic perspective structural diagram of a cylindrical lens in the view separation element shown in fig. 3, and referring to fig. 3, the view separation element includes: a first substrate 11 and a second substrate 12 disposed opposite to each other, the first substrate 11 including a first electrode layer 21, the second substrate 12 including a second electrode layer 22; a microstructure layer 30 disposed on the first substrate 11, where the microstructure layer 30 includes a plurality of parallel columnar lenses 31, and fig. 2 is a perspective view of a columnar lens according to an embodiment of the present invention, and meanwhile, refer to fig. 2, where, in an arrangement direction of the columnar lenses 31, a surface of each of the columnar lenses 31 on a side far from the first substrate 11 includes at least two planes 311 sequentially connected, and arc surfaces 312 respectively connected to the planes on two sides; an alignment layer 40 disposed on a surface of the microstructure layer 30 on a side away from the first substrate 11; an electro-optic material layer 50 disposed on a surface of the alignment layer 40 away from the first substrate 11, and the second substrate 12 is disposed on a side of the electro-optic material layer 50 away from the first substrate 11.
The first substrate 11 and the second substrate 12 may be rigid glass substrates, or flexible substrates made of organic or inorganic materials, the first electrode layer 21 and the second electrode layer 22 on the first substrate 11 and the second substrate 12 may be made of transparent metal oxide films, or may be made of nano silver wires, metal grids, or the like, the electro-optical material layer may be a liquid crystal layer, the alignment layer may be made of flexible organic materials, such as polyimide, or the like, and the lenticular lenses in the microstructure layer may be made of transparent resins. In addition, the circular arc surfaces 312 of the lenticular lens 31 are located at both sides of the lenticular lens 31, and at least two flat surfaces 311 are sequentially connected to both sides from the top of the lenticular lens 31 and are connected to the circular arc surfaces 312 located at both sides of the lenticular lens 31. The alignment layer 40 is formed by spraying the alignment liquid on the surface of the lenticular lens 31, and the surfaces on both sides of the lenticular lens 31 are arc surfaces 312 with gradually changed slopes, so that the alignment liquid is easier to be retained than a plane with a larger slope when the alignment liquid is sprayed, and the alignment liquid can be better coated on the surface of the lenticular lens 31.
According to the view separating element provided by the embodiment of the invention, the microstructure layer formed by the plurality of parallel columnar lenses is arranged on one side of the first substrate, the surface of each columnar lens far away from one side of the first substrate comprises at least two planes which are sequentially connected and the circular arc surfaces which are respectively connected with the two most sides, then the alignment layer is arranged on the microstructure layer formed by the columnar lenses, the plane with larger absolute value of slope in the polyhedral cylindrical lens can be replaced by the circular arc surfaces, the problem that the coating effect of the alignment liquid is poor on the plane with larger slope on the polyhedral cylindrical lens is solved, the alignment layer can be uniformly formed when the alignment film is coated on the columnar lens, and further the alignment effect of liquid crystal and the display effect of the view separating device are ensured.
In addition, in order to solve the problem of poor coating effect of the alignment liquid of the polygonal column mirror, a transfer printing plate coating process can be adopted to realize the coating of the alignment liquid at present. Specifically, the PI liquid is sprayed onto the doctor blade through the PI nozzle, and then the PI liquid is uniformly applied to the surface of the anilox roller by the doctor blade closely contacting the anilox roller and by the rotation of the anilox roller itself. When the anilox roller rotates, the alignment plate loaded on the plate cylinder is contacted with the anilox roller, PI liquid is transferred onto the alignment plate, then the substrate is contacted with the alignment plate when moving forwards along with the platform, and finally the PI liquid is transferred onto the substrate. The transfer plate needs to be redesigned every time a new model is developed, but the transfer plate is opened and molded into hundreds of thousands of models, which is very expensive and has a long exchange period. In the new product development stage and the customer sample delivery stage, the product has uncertainty, the product requirement change possibility is high, the order achievement state is unknown, and if the new product adopts transfer printing, the product development cost and the development period can be greatly increased. In contrast, by adopting the structure of the columnar lens, the spraying of the alignment liquid can be realized by adopting an ink-jet type spraying process, and the problem of poor spraying effect is solved; in addition, when PI liquid is used as the alignment liquid, the process parameters (such as activation time and irradiation intensity) of the inkjet spraying process may be unified with those of the PI front-end process (such as preparation of PI substrate), and in order to match with the subsequent PI liquid printing and alignment process, the process parameters of the inkjet spraying process and the transfer printing coating process are different, i.e. different from those of the PI front-end process, when PI liquid coating is performed by the transfer printing coating process, the process parameters need to be reset, and at this time, product rejection may be caused by abnormal parameter setting. Therefore, in the process of preparing the alignment liquid, the visual separating element provided by the invention can adopt an inkjet spraying process, so that the development cost and the development period of the product can be reduced under the condition of ensuring the coating effect of the alignment liquid, and the product scrapping caused by abnormal parameter setting in the production process is prevented.
Fig. 5 is a schematic structural diagram of a cross section of a cylindrical lens according to an embodiment of the present invention, referring to fig. 5, an absolute value of a slope |tanα| of a tangential plane corresponding to an end of an arc surface 312 connected to a plane 311 is smaller than or equal to the absolute value of a slope |tanβ| of the plane connected to the arc surface.
The slope of the arc surface 312 is gradually changed, and the absolute value of the slope of the end connected with the plane is minimum, so that the slope of the tangent plane of the end connected with the plane 311 is smaller than or equal to the connected plane 311 by arranging the arc surface 312, the initial gradient of the slope gradual change of the arc surface 312 can be ensured to be smaller, and when the alignment liquid is sprayed, the alignment liquid on the arc surface 312 can be buffered to a certain extent, and then the alignment liquid is reserved.
In order to prevent the slope of the end of the arc surface 312 connected to the plane 311 from being different from the slope of the plane 311, so that the end of the arc surface 312 connected to the plane 311 retains too much alignment liquid, resulting in accumulation of the alignment liquid therein, the end of the arc surface 312 connected to the plane 311 may be provided so that the slope of the plane 311 tangent to the end of the arc surface 312 connected to the plane 312, that is, the absolute value of the slope of the tangent plane corresponding to the end of the arc surface 312 connected to the plane 311 is equal to the absolute value of the slope of the plane connected to the arc surface.
Optionally, with continued reference to fig. 5, the pattern of the lenticular lens 31 on any cross section is an axisymmetric pattern, wherein the cross section is a cross section perpendicular to the extending direction of the lenticular lens. At this time, the light rays emitted through the lenticular lens 31 are also axisymmetrically distributed, so that the optimum viewing position of the stereoscopic picture is conveniently designed.
The cross-sectional pattern of the lenticular lens 31 shown in fig. 5 is an axisymmetric pattern, and it is apparent that the symmetry axis of the axisymmetric pattern is a perpendicular bisector of the bottom side. Optionally, at least two planes 311 of the lenticular lens are patterned in cross section with at least two sides of a regular polygon. Fig. 6 is a schematic cross-sectional view of another lenticular lens according to an embodiment of the present invention, and referring to fig. 6, the lenticular lens 31 includes two flat surfaces 311 and an arc surface 312, wherein the two flat surfaces 311 are two sides of a regular dodecagon. Fig. 7 is a schematic cross-sectional view of another cylindrical lens according to an embodiment of the present invention, and referring to fig. 7, the cylindrical lens 31 includes three planes 311 and an arc surface 312, wherein the three planes 311 are three sides of a regular fourteen-sided shape. By arranging at least two sides of the regular polygon of at least two planes of the columnar lens in the cross section graph, the same area of at least two planes of the columnar lens and the same slope of two axisymmetric planes can be ensured, thereby ensuring the same coating effect of the alignment liquid on the axisymmetric planes.
Alternatively, a plane at the top of the lenticular lens 31 is parallel to the bottom surface of the lenticular lens 31 (refer to fig. 7). At this time, compared with the planar structure of the lenticular lens 31 shown in fig. 6, for the lenticular lens 31 corresponding to the regular polygon with the same number of sides, when the plane 311 at the top of the lenticular lens 31 is parallel to the bottom surface of the lenticular lens 31, the change of the absolute value of the slope of the two side planes 311 can be slowed down, so that more planes 311 are formed on the lenticular lens under the condition that the alignment liquid can be uniformly coated on the surface of the plane 311, thereby improving the stereoscopic display effect.
Alternatively, the number of the planes of the columnar lenses is three. At present, a polyhedral cylindrical lens generally has 7-11 planes, and considering that the cylindrical lens is generally of a semi-cylindrical lens structure, the regular polygon corresponding to the plane of the cylindrical lens should have at least fourteen sides; the smaller the number of edges of the regular polygon, the smaller the internal angle of the regular polygon, namely the smaller the included angle between two adjacent planes on the lenticular lens, and accordingly, the faster the absolute value of the slope of the plane changes, so that the problem of poor coating effect of the alignment liquid is more likely to occur in the 7-plane polyhedral lenticular lens. Therefore, the embodiment of the invention can be used for designing the cylindrical lens based on the 7-plane polyhedral cylindrical lens. In the course of improving the lenticular lens, the applicant found that, for the 7-plane polygonal lenticular lens structure shown in fig. 2, the planes starting from the top plane and proceeding to one side are ordered (the symmetrical plane numbers are the same), and the problem that the alignment liquid "catches" the film surface holes can occur starting from the third plane. Therefore, based on the polyhedral cylindrical lens structure of fig. 2, the embodiment of the invention designs the cylindrical lens structure shown in fig. 4 or 7, wherein the number of planes of the cylindrical lenses is three, so that the problem of poor coating effect of the alignment liquid due to the existence of planes with larger slope can be solved. In addition, for the existing polyhedral cylindrical lens structure with the plane larger than 7, the absolute value change of the slope of the plane is slower than that of the plane in the polyhedral cylindrical lens structure with the plane larger than 7, so that the problem of poor coating effect of the alignment liquid can be solved as long as the three continuous planes at the top of the cylindrical lens are reserved, and the film forming property of the alignment film on the plane 311 is ensured.
It should be noted that, based on a polyhedral cylindrical lens structure with a plane larger than 7, the number of planes of the cylindrical lenses in the embodiment of the invention can be larger than three as the number of planes increases, so long as the problem that the alignment liquid cannot 'hang' the film surface hole due to the overlarge absolute value of the slope of the planes is avoided. However, considering that the more complex the structural design of the lenticular lens and the more difficult the process is, the embodiment of the invention sets three planar numbers of the lenticular lens and can ensure the coating effect of the alignment liquid of most of the lenticular lenses
The embodiment of the present invention further provides a view separating element, fig. 8 is a schematic structural diagram of another view separating element provided by the embodiment of the present invention, and referring to fig. 3 and fig. 8, optionally, the lenticular lens 31 is a lenticular convex lens or a lenticular concave lens. For the microstructure layer 30 of the cylindrical concave lens 31, when the alignment layer 40 is formed thereon, the two sides of the inner surface of the concave lens 31 have larger slopes, and the inner surface of the concave lens comprises at least two planes which are sequentially connected and arc surfaces which are respectively connected with the two most sides, so that the plane with larger absolute value of the slope in the polyhedral cylindrical lens can be replaced by the arc surfaces, the problem that the alignment liquid coating effect is poor on the plane with larger slope on the polyhedral cylindrical lens is solved, the alignment layer can be uniformly formed when the alignment film is coated on the cylindrical lens, and the alignment effect of liquid crystals and the display effect of a vision separation device are ensured.
As shown in fig. 3, when the lenticular lens 31 is a lenticular lens, the view separating element is a lenticular lens 31 that is passed through the light splitting effect of the lenticular lens when stereoscopic display is achieved, and when the view separating element shown in fig. 8 is a lenticular lens that is formed of an electro-optical material in the lenticular lens 31 when stereoscopic display is achievedAnd the lens structure realizes a light splitting effect, and two patterns with parallax information are respectively projected to the left eye and the right eye of a person, so that stereoscopic vision is formed. Specifically, when the lenticular lens is a lenticular lens, the refractive index of the lenticular lens is equal to the extraordinary light refractive index of the electro-optic material layer; when the columnar lens is a columnar concave lens, the refractive index of the columnar lens is equal to the ordinary refractive index of the electro-optic material layer. Wherein the electro-optic material layer 50 is a main functional layer of the view separating element, and has an ordinary refractive index n o And extraordinary refractive index n e When the first electrode layer and the second electrode layer are powered on or off, the refractive index of the electro-optic material layer 50 is equal to the ordinary refractive index n o And extraordinary refractive index n e The change between the two modes can realize the conversion of the 2D mode and the 3D mode, and the working principle of the view separating element comprising the columnar convex lens and the columnar concave lens is respectively described below with reference to fig. 3 and 8:
for the lenticular lens view separating element shown in fig. 3, the propagation direction of light for display is the direction from the first substrate toward the second substrate, wherein the refractive index of the lenticular lens is set to n 1 Refractive index n is the extraordinary refractive index n corresponding to the long axis direction of the liquid crystal molecules e When the first electrode layer 21 and the second electrode layer 22 are not powered, the view separating element realizes a 2D mode, the long axes of the liquid crystal molecules are horizontally arranged, and the refractive index of the electro-optical material layer 50 is a extraordinary light refractive index n e At this time, the refractive indexes of the micro-structure layer 30 and the electro-optical material layer 50 are the same, so that the micro-structure layer 30 and the electro-optical material layer 50 form a flat structure layer, light rays still propagate along the original light path direction after passing through the micro-structure layer 30 and the electro-optical material layer 50, that is, no light splitting effect exists, and the view separating element realizes a 2D mode; when the first electrode layer 21 and the second electrode layer 22 are powered on, the view separation element realizes a 3D mode in which the long axes of the liquid crystal molecules are arranged perpendicular to the substrate, and the refractive index of the electro-optic material layer 50 is the ordinary refractive index n o And according to the characteristics of liquid crystal molecules, n 1 ＝n e ＞n o The light rays, when passing through the lenticular lenses 31 in the micro-structured layer 30 to the interface of the electro-optic material layer 50, are due to the lenticular lenses 31The refractive index is greater than that of the electro-optic material layer 50, and thus refraction occurs, that is, the lenticular lens 31 plays a role of splitting light, so that outgoing light of left and right eyes displayed in a specific form is converged and split into images, and different eye patterns are received by the left and right eyes of an observer, thereby forming a stereoscopic image by the brain.
For the lenticular lens view separating element shown in fig. 8, the propagation direction of light for display is a direction from the second substrate toward the first substrate, wherein the refractive index of the lenticular lens is set to n 2 Refractive index n corresponding to the long axis direction of the liquid crystal molecules, i.e. ordinary refractive index o When the first electrode layer 21 and the second electrode layer 22 are not powered, the view separation element is in 3D mode, the long axes of the liquid crystal molecules are horizontally arranged, and the refractive index of the electro-optic material layer 50 is the extraordinary refractive index n e Since the refractive index of the columnar lens is n 2 ＝n o At this time, the liquid crystal molecules filled in the lenticular lens 31 form a lenticular lens, and light is refracted when passing through the interface between the lenticular lens formed by the liquid crystal molecules and the lenticular lens 31, that is, a light splitting effect is generated, so that outgoing light of left and right eye patterns displayed in a specific form is converged and split, and different eye patterns are received by left and right eyes of an observer, so that a stereoscopic image is formed by the brain. When the first electrode layer 21 and the second electrode layer 22 are energized, the long axes of the liquid crystal molecules are arranged perpendicular to the substrate, and the refractive index of the electro-optic material layer 50 is n o The refractive index of the microstructure layer 30 formed by the columnar concave lens 31 is the same as that of the microstructure layer 30, so that the microstructure layer 30 and the electro-optical material layer 50 form a flat structure layer, light rays still propagate along the original light path direction after passing through the microstructure layer 30 and the electro-optical material layer 50, namely, no light splitting effect exists, and the view separating element realizes a 2D mode.
Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 9, the display device includes a display module 200 and any one of the view separation elements 100 according to an embodiment of the present invention, where the view separation element 100 is disposed on a light emitting surface of the display module 200.
According to the display device provided by the embodiment of the invention, the microstructure layer formed by the plurality of parallel columnar lenses is arranged on one side of the first substrate of the vision separation element, the surface of each columnar lens far away from one side of the first substrate comprises at least two planes which are sequentially connected and the circular arc surfaces which are respectively connected with the two most sides, then the alignment layer is arranged on the microstructure layer formed by the columnar lenses, the plane with larger absolute value of slope in the polyhedral cylindrical lens can be replaced by the circular arc surfaces, the problem that the coating effect of the alignment liquid is poor on the surface with larger slope on the polyhedral cylindrical lens is solved, the alignment layer can be uniformly formed when the alignment film is coated on the columnar lens, and further the alignment effect of liquid crystal and the display effect of the vision separation device are ensured.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A view separating element, comprising:
the device comprises a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first electrode layer, and the second substrate comprises a second electrode layer;
the microstructure layer is arranged on the first substrate and comprises a plurality of columnar lenses which are arranged in parallel, wherein in the arrangement direction of the columnar lenses, the surface of any cross section figure of each columnar lens, which is far away from one side of the first substrate, comprises at least two planes which are sequentially connected, and arc surfaces which are respectively connected with the planes at the two most sides, and the cross section is a cross section which is perpendicular to the extending direction of the columnar lenses;
the alignment layer is arranged on the surface of the microstructure layer, which is far away from one side of the first substrate;
the electro-optic material layer is arranged on the surface of the alignment layer, which is far away from the first substrate, and the second substrate is positioned on the side of the electro-optic material layer, which is far away from the first substrate;
the end, connected with the plane, of the arc surface is tangent to the plane connected with the arc surface.
2. The view separating element of claim 1, wherein the lenticular lens has an axisymmetric pattern in any cross-section.
3. The view separating element of claim 2, wherein the at least two planes are patterned in the cross-section as at least two sides of a regular polygon.
4. A view separating element as claimed in claim 3, wherein the regular polygon has at least fourteen sides.
5. The view separating element of claim 4, wherein the number of planes is 3.
6. The view separating element according to claim 1, wherein the lenticular lens is a lenticular convex lens or a lenticular concave lens.
7. The view separating element according to claim 6, wherein the electro-optic material layer has an ordinary refractive index and an extraordinary refractive index;
when the columnar lens is a columnar convex lens, the refractive index of the columnar lens is equal to the extraordinary light refractive index;
when the columnar lens is a columnar concave lens, the refractive index of the columnar lens is equal to the refractive index of the ordinary light.
8. A display device, comprising a display module and a view separating element according to any one of claims 1 to 7, wherein the view separating element is disposed on a light-emitting surface of the display module.
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| CN109445204B (en) * | 2018-12-27 | 2021-10-26 | 张家港康得新光电材料有限公司 | Calculation method of spraying density of spacing balls, visual separation element and preparation method thereof |
| CN115315658B (en) * | 2021-06-30 | 2024-04-09 | 纵深视觉科技(南京)有限责任公司 | Light modulation module and switchable stereoscopic display device |
| CN113467152A (en) * | 2021-06-30 | 2021-10-01 | 纵深视觉科技(南京)有限责任公司 | Light modulation module and switchable three-dimensional display device |
| CN114442358A (en) * | 2022-01-14 | 2022-05-06 | 深圳英伦科技股份有限公司 | Liquid crystal lens and preparation method thereof |
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