CN111338108A

CN111338108A - Display device

Info

Publication number: CN111338108A
Application number: CN202010267682.8A
Authority: CN
Inventors: 顾跃凤; 王建栋
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-06-26
Anticipated expiration: 2040-04-08
Also published as: CN111338108B

Abstract

The invention discloses a display device. The method comprises the following steps: the display layer comprises a substrate, and a plurality of first sub-pixels and second sub-pixels which are arranged on the substrate in an array manner, and the display layer is provided with a light emergent side; the light splitting element is arranged on the light emitting side of the display layer and comprises a first unit and a second unit, the first unit is arranged corresponding to the first sub-pixel and the second unit is arranged corresponding to the second sub-pixel, the first unit comprises a first bulge and a first reflecting layer, the first bulge is provided with a first reflecting surface and a first emergent surface, the first reflecting layer is arranged on the first reflecting surface, the second unit comprises a second bulge and a second reflecting layer, the second bulge is provided with a second reflecting surface and a second emergent surface, and the second reflecting layer is arranged on the second reflecting surface; and the light blocking layer is arranged on one side of the light splitting element close to the substrate base plate, and the orthographic projection of the light blocking layer on the substrate base plate is at least partially overlapped with the orthographic projection of the first emergent surface and the orthographic projection of the second emergent surface on the substrate base plate. The display device disclosed by the invention can improve the double-view display effect.

Description

Display device

Technical Field

The invention belongs to the technical field of display, and particularly relates to a display device.

Background

In the prior double-view angle display device, a plane grating is mostly adopted to realize double-view angle display. Visual areas with different angles are realized through the grating, but a larger crosstalk area exists between adjacent visual areas, so that the display effect is influenced.

Disclosure of Invention

The embodiment of the invention provides a display device, aiming at improving the double-view display effect of the display device.

The invention provides a display device which comprises a display layer, a light splitting element and a light reflecting layer, wherein the display layer comprises a substrate base plate, a plurality of first sub-pixels and second sub-pixels, the first sub-pixels and the second sub-pixels are arranged on the substrate base plate in an array mode, the display layer is provided with a light emitting side face, the light splitting element is arranged on the light emitting side of the display layer and comprises first units and second units, the first units and the second units are arranged corresponding to the first sub-pixels, the second units comprise second bulges and second reflecting layers, the first bulges and the second bulges are protruded towards one side, away from the light emitting face, of the substrate base plate, away from the light emitting face, the first bulges are provided with first reflecting faces and first light emitting faces, the first reflecting faces and the light emitting substrate base plate are arranged at an angle α, the first reflecting layer is arranged on the first reflecting faces, a forward projection light emitting face of the first reflecting faces on the substrate base plate is overlapped with a forward projection light emitting face of the corresponding first sub-pixels on the light emitting face, the light reflecting face is arranged on the substrate base plate from the first reflecting face after being reflected by the first reflecting face, the second reflecting face is overlapped with the light emitting face, the light reflecting face, the light emitting face, the light reflecting face is arranged on the second reflecting face, the light emitting face, the light reflecting face is arranged on the light reflecting face, the light emitting face, the light reflecting face, the light emitting face, the light reflecting face is arranged on the light emitting face, the light reflecting face is arranged on the light reflecting face, the light emitting face.

In the embodiment of the invention, the light-emitting side of the display layer is provided with the light-splitting element, the first unit and the second unit of the light-splitting element are respectively arranged corresponding to the first sub-pixel and the second sub-pixel of the display layer, part of light rays emitted by the first sub-pixel can be blocked by the light-blocking layer, the other part of light rays can be emitted from the first emergent surface after being reflected by the first reflecting surface provided with the first reflecting layer, part of light rays emitted by the second sub-pixel can be blocked by the light-blocking layer, and the other part of light rays can be emitted from the second emergent surface after being reflected by the second reflecting surface provided with the second reflecting layer. Set up first reflection stratum and second reflection stratum respectively at first plane of reflection and second plane of reflection, can avoid light to take place the refraction and influence display device's light-emitting efficiency at first plane of reflection and second plane of reflection, the layer that is in the light can block the first sub-pixel on display layer and the direct light to first exit surface and the transmission of second exit surface of second sub-pixel, prevent that these light from causing the influence to display effect, with this double-view display effect who promotes display device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a top view of a display device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view B-B of FIG. 1;

fig. 3 is a schematic structural diagram of a light splitting element according to a first embodiment of the present invention;

fig. 4 is a schematic structural view of a dual view display device in the related art;

FIG. 5 is a schematic structural diagram of a light-splitting element according to a second embodiment of the present invention;

FIG. 6 is a schematic top view of a color resist layer according to an embodiment of the invention;

FIG. 7 is a schematic top view of a color resist layer according to another embodiment of the invention;

FIG. 8 is a schematic structural diagram of a light-splitting element according to a third embodiment of the present invention;

FIG. 9 is a schematic top view of a color resist layer according to another embodiment of the invention;

FIG. 10 is a schematic top view of a color resist layer according to still another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a light splitting element according to a fourth embodiment of the present invention;

FIG. 12 is a partial schematic view of the light-splitting element shown in FIG. 3;

fig. 13 is a schematic structural diagram of a light splitting element according to a fifth embodiment of the present invention;

FIG. 14 is a partial schematic view of the light-splitting element shown in FIG. 13;

fig. 15 is a schematic structural diagram of a light-splitting element according to a sixth embodiment of the present invention;

fig. 16 is a partial schematic view of the light splitting structure shown in fig. 15.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The display device 1000 according to the embodiment of the present invention is described in detail below with reference to fig. 1 to 16.

Referring to fig. 1 and fig. 2, fig. 1 is a top view of a display device according to an embodiment of the present invention; fig. 2 is a sectional view B-B of fig. 1. The display device 1000 has a display area AA and a non-display area NA disposed around the display area AA. The display device 1000 includes a display layer 100, the display layer 100 includes a substrate 101 and a plurality of sub-pixels 120 located on the substrate 101, and the sub-pixels 102 at least include red, green and blue sub-pixels, so as to realize a colorized display of the display device 1000. The sub-pixels 120 of the display layer 100 are disposed at intervals.

The Display device 1000 may be a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), a Micro-LED (Micro-LED), or other types of Display devices.

For example, as shown in fig. 2, if the display device is an LCD, the display layer 100 may be a liquid crystal display panel, and include an array substrate 110, a color filter substrate 130, a liquid crystal layer 140 located between the array substrate 110 and the color filter substrate 130, and a backlight source (not shown) located on a side of the array substrate 110 away from the color filter substrate 130. The color filter substrate 130 may include a color resist layer 131, and the color resist layer 131 includes color resist units 1311 corresponding to the sub-pixels 120 and black matrixes 1312 located between the adjacent color resist units 1311. The orthographic projection of the color resistance unit 1311 on the array substrate 110 overlaps with the orthographic projection of the sub-pixel 120 on the array substrate 110. Further, a first polarizer 102 and a second polarizer 103 are respectively disposed at both sides of the display layer 100 to generate linearly polarized light.

For example, the display device may be an OLED display device, and the display layer 100 may be an OLED display panel. The OLED display panel can comprise an array substrate, wherein the array substrate comprises a pixel driving circuit and an anode, the OLED display panel further comprises a cathode arranged opposite to the anode, and an organic light-emitting unit arranged between the anode and the cathode, and under the driving of the anode and the cathode, the organic light-emitting unit realizes light-emitting display. In some embodiments, the light-emitting side of the display layer 100 may be provided with a circular polarizer to reduce the reflection of external light and improve the display effect.

For the display device 1000 for implementing dual viewing angles, a part of the light rays of the sub-pixels 120 of the display layer 100 exit towards a first direction for forming a first picture, and another part of the light rays of the sub-pixels 120 exit towards a second direction for forming a second picture. The sub-pixel 120 of the display layer 100 for forming the first picture can be defined as a first sub-pixel 121, and the sub-pixel 120 for forming the second picture can be defined as a second sub-pixel 122. The first subpixel 121 includes a first red subpixel, a first green subpixel, and a first blue subpixel, and the second subpixel 122 includes a second red subpixel, a second green subpixel, and a second blue subpixel. For the LCD, each sub-pixel realizes colorized display through the color resistance unit 1311 of the color film substrate 130, then, the color resistance unit 1311 may include a first red color resistance unit R1, a first green color resistance unit G1, and a first blue color resistance unit B1 respectively corresponding to the first red sub-pixel, the first green sub-pixel, and the first blue sub-pixel, and a second red color resistance unit R2, a second green color resistance unit G2, and a second blue color resistance unit B2 respectively corresponding to the second red sub-pixel, the second green sub-pixel, and the second blue sub-pixel. For the OLED display device, the organic light emitting unit can directly emit light of different colors without passing through the color resistance unit.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a light splitting element according to a first embodiment of the invention. Taking the LCD as an example, the display device 1000 further includes a light splitting element 200, and the light splitting element 200 is disposed on the light emitting side of the display layer 100. The light splitting element 200 includes a first cell 210 disposed corresponding to the first subpixel 121 and a second cell 220 disposed corresponding to the second subpixel 122.

The first unit 210 includes a first protrusion 211 and a first reflective layer 212, and in conjunction with fig. 2, the first protrusion 211 protrudes toward a side away from the substrate base substrate 101, the first protrusion 211 has a first reflective surface 2111 and a first exit surface 2112, specifically, the first protrusion 211 protrudes toward a side away from the color filter substrate 130, the first reflective surface 2111 is disposed at an angle α with respect to the substrate base substrate 101, that is, as shown in fig. 3, the first reflective surface 2111 and the plane where the second polarizer 103 is located, that is, the plane where the substrate base substrate 101 is located (that is, the horizontal plane in fig. 3) are disposed at an angle α, the first reflective layer 212 is disposed on the first reflective surface 2111, specifically, in some embodiments, the first reflective layer 212 may be disposed on at least a portion of an outer surface of the first reflective surface 2111, an orthographic projection of the first reflective surface 2111 on the substrate base substrate 101 and a corresponding orthographic projection of the first subpixel 121 on the substrate base substrate 101, light rays emitted from the first reflective surface 2111 can be overlapped with the exit surface 2112 after being reflected.

The second unit 220 includes a second protrusion 221 and a second reflective layer 222, the second protrusion 221 protrudes toward a side away from the substrate base substrate 101, the second protrusion 221 has a second reflective surface 2211 and a second exit surface 2212. specifically, the second protrusion 221 protrudes toward a side away from the color filter substrate 130. the second reflective surface 2211 is disposed at an angle β with the substrate base substrate 101, that is, as shown in fig. 3, the second reflective surface 2211 is disposed at an angle β with a plane of the second reflective surface 103, that is, a plane of the substrate base substrate 101 (that is, a horizontal plane in fig. 3). the second reflective layer 222 is disposed at the second reflective surface 2212. specifically, in some embodiments, the second reflective layer 222 may be disposed at least a portion of an outer surface of the second reflective surface 2111. an orthographic projection of the second reflective surface 2211 on the substrate base substrate 101 overlaps with an orthographic projection of the corresponding second subpixel 122. light emitted from the second exit surface 2212 can be reflected by the second reflective surface 2211.

The first reflecting surface 2111 of the first unit 210 and the second reflecting surface 2211 of the second unit 220 are inclined in opposite directions, so that the light reflected by the first reflecting surface 2111 of the first sub-pixel 121 and the light reflected by the second reflecting surface 2211 of the second sub-pixel 122 exit in different directions, and dual-view display is realized.

The display device 1000 further includes a light-blocking layer 300, the light-blocking layer 300 is disposed on a side of the light-splitting element 200 close to the substrate 101, and an orthographic projection of the light-blocking layer 300 on the substrate 101 at least partially overlaps with orthographic projections of the first exit surface 2112 and the second exit surface 2212 on the substrate 101.

In this embodiment, by disposing the light splitting element 200 on the light exit side of the display layer 100, the first unit 210 and the second unit 220 of the light splitting element 200 are disposed corresponding to the first sub-pixel 121 and the second sub-pixel 122 of the display layer 100, respectively, a part of light emitted by the first sub-pixel 121 may be blocked by the light blocking layer 300, another part of light may be reflected by the first reflection surface 2111 provided with the first reflection layer 212 and then exit from the first exit surface 2112, a part of light emitted by the second sub-pixel 122 may be blocked by the light blocking layer 300, and another part of light may be reflected by the second reflection surface 2211 provided with the second reflection layer 222 and then exit from the second exit surface 2212. The first reflection layer 212 and the second reflection layer 222 are respectively disposed on the first reflection surface 2111 and the second reflection surface 2211, so that the light extraction efficiency of the display device 1000 can be prevented from being affected by the refraction of light rays on the first reflection surface 2111 and the second reflection surface 2211, the light blocking layer 300 can block the light rays directly emitted to the first exit surface 2112 and the second exit surface 2212 by the first sub-pixel 121 and the second sub-pixel 122 of the display layer 100, and the influence of the light rays on the display effect is prevented, so that the dual-view display effect of the display device 1000 is improved.

In some embodiments, the light reflected by the first reflection surface 2111 of the first subpixel 121 is emitted perpendicular to the first exit surface 2112, and the light reflected by the second reflection surface 2211 of the second subpixel 122 is emitted perpendicular to the second exit surface 2212, so that the light can be ensured to be directly emitted at the first exit surface 2112 and the second exit surface 2212 without reflection and refraction, and the light extraction efficiency is improved.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a dual-view display device in the related art. In the dual-view display device in fig. 4, the light beams of different sub-pixels of the display layer 100 are diffracted by the grating layer 400 to realize the deflection of the light beams in different directions, and different pictures can be respectively seen in the visible areas on the light emitting side of the dual-view display device in fig. 4. However, since the grating diffracts strong light in the middle crosstalk area in the graph, the diffracted light intensity of the part is not negligible, so that the middle crosstalk area is large, and if a user watches the part, two overlapped pictures can be seen. In the display device 1000 according to the embodiment of the present invention, the first reflection surface 2111 and the second reflection surface 2211 respectively reflect the light rays, so that the light rays are emitted towards two different directions through the first emission surface 2112 and the second emission surface 2212, and the light rays can be prevented from being emitted towards the middle area of the display device 1000 by shielding of the light blocking layer 300, and the display screen is basically invisible in the middle area of the light emitting side of the display device 1000, therefore, compared with the scheme of the related art that the double viewing angles are realized by adopting grating diffraction, the display device 1000 according to the embodiment of the present invention can effectively reduce the crosstalk area.

In some embodiments, the first sub-pixels 121 and the second sub-pixels 122 are alternately arranged, and accordingly, the first cells 210 and the second cells 220 are also alternately arranged. The light emitted from the adjacent first sub-pixel 121 and second sub-pixel 122 is emitted to two directions through the first unit 210 and the second unit 220, respectively, so that the quantity of the light facing to the two directions is balanced, and the consistency of the display effect of the two pictures is ensured.

Further, the number of the first red sub-pixel, the first green sub-pixel and the first blue sub-pixel included in the first sub-pixel 121 is the same as the number of the same-color sub-pixels of the second red sub-pixel, the second green sub-pixel and the second blue sub-pixel included in the second sub-pixel 122, so as to ensure that the display effects of the pictures at the two viewing angles are the same. After the light of each first red sub-pixel, first green sub-pixel and first blue sub-pixel is emitted through the corresponding first unit 210, the directions of the light are the same, and after the light of each second red sub-pixel, second green sub-pixel and second blue sub-pixel is emitted through the corresponding second unit 220, the directions of the light are the same, so as to prevent color cast.

In some embodiments, the orthographic projection of the first reflective layer 212 on the substrate base 101 is contiguous with the orthographic projection of the light-blocking layer 300 on the substrate base 101. In other embodiments, the orthographic projection of the second reflective layer 222 on the substrate base 101 is adjacent to the orthographic projection of the light-blocking layer 300 on the substrate base 101. By "abutting" herein is meant that the two edges are immediately adjacent and do not overlap. The edges of the orthographic projections of the first and second

reflective layers

212 and 222 on the substrate base plate 101 are just adjacent to the edges of the orthographic projections of the light-blocking layer 300 on the substrate base plate 101. The light rays of the first sub-pixel 121 which only exit to the first reflection surface 2111 covered by the first reflection layer 212 can be ensured to exit through the first exit surface 2112 after being reflected by the first reflection surface 2111, and the light rays of the second sub-pixel 122 which only exit to the second reflection surface 2211 covered by the second reflection layer 222 can exit through the second exit surface 2212 after being reflected by the second reflection surface 2211, so that the light ray crosstalk can be reduced, and the double-view-angle imaging effect can be improved.

In some embodiments, the display device is an LCD, and the orthographic projection of the first unit 210 and the second unit 220 on the color resist layer 131 can cover each color resist unit 1311. To ensure that the light emitted from the first sub-pixel 121 and the second sub-pixel 122 can enter the first unit 210 and the second unit 220 respectively for reflection.

Further, in an embodiment, please refer to fig. 5, wherein fig. 5 is a schematic structural diagram of a light splitting element according to a second embodiment of the present invention. Orthographic projections of the first unit 210 and the second unit 220 on the color resistance layer 131 are coincident with the positions of the color resistance units 3111. As long as it is ensured that the first unit 210 and the second unit 220 are disposed at positions opposite to the color blocking units 1311, light rays emitted from the first sub-pixel 121 and the second sub-pixel 122 can be emitted from the first emitting surface 2112 and the second emitting surface 2212 in different directions, so that dual-viewing-angle display is achieved, that is, in this embodiment, the first unit 210 and the second unit 220 are not disposed at positions corresponding to the black matrix 1312, so that materials can be saved.

In another embodiment, as shown in fig. 3, the orthographic projection edges of the first unit 210 and the second unit 220 on the color resist layer 131 are located between two adjacent color resist units 1311. In this embodiment, each of the first unit 210 and the second unit 220 of the light splitting element 200 may be continuously disposed, that is, the edges of the first unit 210 and the second unit 220 are located at the position opposite to the center line of the black matrix 1312 between the adjacent color resistance units 1311, so as to simplify the manufacturing process of the first unit 210 and the second unit 220.

In some embodiments, please refer to fig. 6 and 7, fig. 6 is a schematic top view of a color resist layer according to an embodiment of the invention; fig. 7 is a schematic top view of a color resist layer according to another embodiment of the invention. In this embodiment, the color resist layer 131 has a conventional structure, and the widths of the black matrices 1312 between the adjacent color resist cells 1311 are substantially the same. The structure of the color resist layer 131 of this embodiment can be used in the display device of the corresponding embodiment of fig. 3 and 4. In other embodiments, the light-blocking layer 300 may be a hollow structure at a position opposite to the black matrix 1312, so as to save the material of the light-blocking layer 300.

In some embodiments, please refer to fig. 8 to 10, and fig. 8 is a schematic structural diagram of a light splitting device according to a third embodiment of the present invention. FIG. 9 is a schematic top view of a color resist layer according to another embodiment of the invention; fig. 10 is a schematic top view of a color resist layer according to still another embodiment of the invention. In this embodiment, the area of the black matrix 1312 corresponding to the area between the adjacent first unit 210 and second unit 220 may be increased to multiplex the black matrix 1312 of the color barrier layer 131 into the light blocking layer 300, so as to block the light emitted from the partial areas of the first subpixel 121 and the second subpixel 122, respectively, and prevent the light of the first subpixel 121 and the second subpixel 122 from being emitted from the first exit surface 2112 and the second exit surface 2212 without being reflected by the first reflection surface 2111 and the second reflection surface 2211, respectively, and causing crosstalk. In this embodiment, the black matrix 1312 of the color resist layer 131 of the color filter substrate 130 is reused as the light blocking layer 300, so that the preparation process can be simplified, and the material utilization rate can be improved.

In some embodiments, referring to fig. 2 and fig. 3, the display device is an LCD, and includes a first polarizer 102 and a second polarizer 103 respectively disposed on two sides of the display layer 100, wherein the second polarizer 103 is disposed on a side of the display layer 100 facing away from the substrate 101. The light-splitting element 200 is located on a side of the second polarizer 103 facing away from the display layer 100. In this embodiment, after the light emitted from the backlight passes through the first polarizer 102, the liquid crystal layer 140 and the second polarizer 103, polarized light is generated, and then the light is emitted through the first unit 210 and the second unit 220 of the light splitting element 200, which does not affect the polarization effect of the light.

In some embodiments, please refer to fig. 11, where fig. 11 is a schematic structural diagram of a light splitting element according to a fourth embodiment of the present invention. The first protrusion 211 may include a first connection surface 2113, the first connection surface 2113 connecting the first reflection surface 2111 and the first exit surface 2112, and an area ratio of an orthographic projection of the first connection surface 2113 on the substrate base plate 101 to an orthographic projection of the first protrusion 211 on the substrate base plate 101 is less than 5%. Therefore, the area of the first connection surface 2113 is prevented from being too large, and a part of light emitted by the first sub-pixel 121 is emitted through the first connection surface 2113, and then, a large amount of light crosstalk occurs, which affects the display effect. The first connection surface 2113 is disposed such that the connection manner between the first reflection surface 2111 and the first emission surface 2112 is an over-connection, which can reduce the manufacturing difficulty of the light splitting element 200.

Further, in some embodiments, the orthographic projection of the light-blocking layer 300 on the substrate base plate 101 may cover the orthographic projection of the first connection face 2113 on the substrate base plate 101, and a part of light emitted by the first sub-pixel 121 may be completely prevented from being emitted toward the first connection face 2113, so as to improve the display effect of the dual viewing angles.

In some embodiments, the second protrusion 221 may include a second connection surface 2213, the second connection surface 2213 connects the second reflection surface 2211 and the second exit surface 2212, and an area ratio of an orthographic projection of the second connection surface 2213 on the substrate base 101 to an orthographic projection of the second protrusion 221 on the substrate base 101 is less than 5%. Therefore, the area of the second connection surface 2213 is too large, and a part of light emitted by the second sub-pixel 122 is emitted through the second connection surface 2213, and then, much light crosstalk occurs, which affects the display effect. The second connection surface 2213 is arranged such that the connection manner between the second reflection surface 2211 and the second emission surface 2212 is an excessive connection, which can reduce the difficulty in manufacturing the light splitting element 200.

Further, in some embodiments, the orthographic projection of the light-blocking layer 300 on the substrate base 101 may cover the orthographic projection of the second connection surface 2213 on the substrate base 101, and it may be completely avoided that a part of light emitted by the second sub-pixel 122 exits toward the second connection surface 2213, so as to improve the display effect of the dual viewing angles.

It should be noted that the shape of the first connection surface 2113 and the second connection surface 2213 is not limited by the present invention. Fig. 11 illustrates only the first connection surface 2113 and the second connection surface 2213 as being flat, and in other embodiments, the first connection surface 2113 and the second connection surface 2213 may also be curved.

In some embodiments, as shown in fig. 3, the first protrusion 211 can be a first prism, and the second protrusion 221 can be a second prism, which is equivalent to the first reflection surface 2111 directly connected to the first exit surface 2112, and the second reflection surface 2211 directly connected to the second exit surface 2212. The cross section of the first prism is a first isosceles triangle, the cross section of the second prism is a second isosceles triangle, the first reflective layer 212 is arranged on the side where the bottom edge of the first isosceles triangle of the first prism is located, and the second reflective layer 222 is arranged on the side where the bottom edge of the second isosceles triangle of the second prism is located. With such an arrangement, it can be ensured that the light reflected by the first reflection surface 2111 of the first sub-pixel 121 is vertically incident on the first exit surface 2112 and exits to the outside of the first protrusion 211 perpendicular to the first exit surface 2112, and the light reflected by the second reflection surface 2211 of the second sub-pixel 122 is vertically incident on the second exit surface 2212 and exits to the outside of the second protrusion 221 perpendicular to the second exit surface 2212. In this embodiment, the first protrusion 211 and the second protrusion 221 are arranged as isosceles triangles, so that the manufacturing difficulty can be simplified, the areas of the first reflecting surface 2111 and the second reflecting surface 2211 can be increased relatively, and the light emitting efficiency is improved.

The first protrusion 211 and the second protrusion 221 in this embodiment may be prepared using an imprinting process. The precision of the imprinting process can reach the nanometer level, and the requirement of aligning the first protrusion 211 and the second protrusion 221 with the first sub-image 121 and the second sub-pixel 122 can be met. Specifically, a transparent substrate may be selected, and the transparent substrate is imprinted by using a mold, and then cured and shaped to form the shapes of the first protrusion 211 and the second protrusion 221. Of course, other processes, such as an etching process, may be used to form the structures of the first protrusion 211 and the second protrusion 221, and the invention is not limited thereto.

Further, in some embodiments, the apex angle θ of the first isosceles triangle₁Satisfies the following conditions: 0 DEG < theta₁Not more than 60 degrees, and the vertex angle theta of the second isosceles triangle₂Satisfies the following conditions: 0 DEG < theta₂The angle is less than or equal to 60 degrees, so that the mutual crosstalk of the light rays of the adjacent first prism and the second prism is prevented, and the light rays emitted from the first prism are prevented from being emitted into the second prism or the light rays emitted from the second prism are prevented from being emitted into the first prism. In some embodiments, the first subpixel 121 and the second subpixel 122 of the display layer 100 are uniform in shape and size. The sizes of the first prism and the second prism may be the same, that is, the first isosceles triangle and the second isosceles triangle may be the same, and the vertex angle θ of the first isosceles triangle may be the same₁The vertex angle theta of the second isosceles triangle₂Are all equal to theta. Referring to fig. 12, fig. 12 is a partial schematic view of the light splitting element shown in fig. 3. Taking the adjacent first prism and second prism as an example, in order to ensure that the light emitted from the first prism does not enter the adjacent second prism, the light emitted from the leftmost sub-pixel 121 corresponding to the first prism should be located at the edge of the second prism, which is away from the substrate 101, after entering the first reflection surface 2111 and being reflected by the first reflection surface 2111 and then being emitted from the first emission surface 2112. Assuming a first reflection of a first isosceles triangleWhen the length of the orthographic projection of the surface 2111 toward the substrate 101 is a, the length of the orthographic projection of the first exit surface 2112 toward the substrate 101 is b, and the length of the orthographic projection of the first isosceles triangle toward the substrate 101 is L, cos (pi-2 θ) ═ b/(a + b) ═ 1-a/L = 1-2cos, as seen from the geometric formula²((pi- θ)/2), from this equation, θ becomes 60 °. Therefore, as long as the vertex angle θ of the first isosceles triangle and the second isosceles triangle satisfies: theta is more than 0 degree and less than or equal to 60 degrees, and therefore the light rays emitted by the first prism and the second prism which are adjacent can be guaranteed not to be interfered.

In some embodiments, the light splitting element 200 further includes a transparent protection layer 230, the transparent protection layer 230 is disposed on a side of the first unit 210 and the second unit 220 away from the substrate 101, and light emitted from the first unit 210 and the second unit 220 is emitted through the transparent protection layer 230 to a refractive index n₀The first light-transmitting medium of (1). The first light-transmitting medium may be, for example, air, and the light emitted from the first unit 210 and the second unit 220 passes through the transparent protection layer 230 and then is emitted to the air. In this embodiment, the transparent protection layer 230 can protect the first unit 210 and the second unit 220, so as to prevent the first unit 210 and the second unit 220 from being damaged and affecting the imaging effect of the dual viewing angles, and the transparent protection layer 230 also plays a role in flattening, so as to ensure that the surface of the light splitting element 200 on the side away from the substrate base plate 101 is flattened, thereby facilitating the setting of other devices.

In an embodiment, please refer to fig. 13, where fig. 13 is a schematic structural diagram of a light splitting element according to a fifth embodiment of the present invention. The transparent protection layer 230 is filled in the regions of the first unit 210 and the second unit 220 departing from the substrate 101, and the refractive indexes of the first protrusion 211 and the second protrusion 221 are the same and are both n₁Refractive index n of transparent protective layer 230₂Then, the refractive index n of the transparent protective layer 230₂Refractive index n of first light-transmitting medium₀Satisfies the following conditions: n is₀≤n₂. In some embodiments, n₀＝n₂Then, after the light beam is emitted from the first unit 210 and the second unit 220 to the transparent protection layer 230, the light beam is emitted from the transparent protection layer to the first light-transmitting medium, the emitting direction of the light beam is not changed,the two angles of view of the light emitted to the first light-transmitting medium are respectively consistent with the angle between the first emitting surface 2112 and the substrate base plate 101 and the angle between the second emitting surface 2212 and the substrate base plate 101. In other embodiments, n₀＜n₂As shown in fig. 13, after the light is emitted from the first unit 210 and the second unit 220 to the transparent protection layer 230, the light is refracted at the interface between the transparent protection layer 230 and the first light-transmitting medium, and since the refractive index of the first light-transmitting medium is smaller than the refractive index of the transparent protection layer 230, the light is further refracted to the side close to the substrate 101 in the first light-transmitting medium, so that the angles of the light emitted to the first light-transmitting medium corresponding to the first sub-pixel 121 and the second sub-pixel 122 can be further increased, and the adjustment of the emission angle of the dual-view display is facilitated. Specifically, the material of the transparent protection layer 230 may be selected according to the actual requirement of the dual viewing angles, so as to adjust the dual viewing angles.

Further, as for the first protrusion 211 and the second protrusion 221 both having a prism structure with an isosceles triangle cross section and an apex angle θ of the isosceles triangle, please further refer to fig. 14, where fig. 14 is a partial schematic view of the light splitting element shown in fig. 13. The light emitted from the first cell 211 and the second cell 221 is refracted and reflected at the interface between the transparent protective layer 230 and the first light-transmitting medium, and the refractive index n of the transparent protective layer 230 is set to avoid total reflection at the interface₂Satisfies the following conditions: n is₂＜n₀And/sin theta. In this embodiment, if the first light-transmitting medium is air, the light rays of the first sub-pixel 121 and the second sub-pixel 122 pass through the light splitting element 200 and then exit to the viewing angle θ in the air₃＝arcsin(n₂sinθ/n₀). In the actual production process, the vertex angle θ of the first prism and the second prism can be adjusted and the materials of the first prism, the second prism and the transparent protection layer 230 can be selected according to the requirement of the actual viewing angle, so as to meet the requirement of the refractive index.

In another embodiment, please refer to fig. 15, in which fig. 15 is a schematic structural diagram of a light splitting element according to a sixth embodiment of the present invention. The first prisms and the second prisms are alternately arranged, areas of one sides of the adjacent first reflection surfaces 2111 and second reflection surfaces 2211, which are away from the substrate base plate 101, are filled with a reflection material 240, and the transparent protection layer 230 is bonded to the sides of the first prisms and the second prisms, which are away from the substrate base plate 101, through the reflection material 240. The reflective material 240 may be, for example, a mixture of ethylene-vinyl acetate copolymer (EVA), a light reflective filler, a peroxide crosslinking agent, and an anti-aging agent. In this embodiment, the reflective material 240 is filled in the region between the first reflective surface 2111 and the second reflective surface 2211, so that the first reflective layer 212 and the second reflective layer 222 can be directly formed, and can be used for bonding the transparent protection layer 230, thereby simplifying the manufacturing process.

Further, the region between adjacent first and

second emission surfaces

2112 and 2212 has a refractive index n₃A refractive index n of the second light-transmitting medium₃Refractive index n of transparent protective layer 230₂And the refractive index n of the first light-transmitting medium₀Satisfies the following conditions: n is₀≤n₃≤n₂. Further, optionally, the refractive index of the second light-transmitting medium and the refractive index of the first light-transmitting medium satisfy: n is₀＝n₃That is, the second light-transmitting medium and the first light-transmitting medium may be the same, both being air. Referring to fig. 16, fig. 16 is a partial schematic view of the light splitting structure shown in fig. 15. The second light-transmitting medium and the first light-transmitting medium both adopt air, the requirement on the refractive index of the material of the transparent protection layer 230 is relatively low, and the light rays emitted from the first unit 210 and the second unit 220 can further deviate to one side of the light rays emitted from the first unit 210 and the second unit 220, so that the crosstalk of the light rays emitted from the first sub-pixel 121 and the second sub-pixel 122 is avoided. Optionally, the refractive indexes of the first protrusion 211, the second protrusion 221 and the transparent protection layer 230 may be the same, that is, the first protrusion 211, the second protrusion 221 and the transparent protection layer 230 may be made of the same material, so that the material utilization rate can be improved.

In this embodiment, the cross sections of the first prism and the second prism are isosceles triangles with an apex angle θ, so that in order to avoid total reflection at the interface between the transparent protection layer 230 and the first transparent medium, the refractive index n of the transparent protection layer 230 is n₂Satisfies the following conditions: n is₂＜n₀And/sin theta. In this embodiment, if the first light-transmitting medium is air, the light rays of the first sub-pixel 121 and the second sub-pixel 122 pass through the light splitting element 100 and then exit to the viewing angle θ in the air₃＝θ。

It should be noted that, in the above embodiments, the display layer 100 is taken as an example of a liquid crystal display panel, and the display layer 100 is also applicable to an OLED display panel, and it is only necessary to dispose the light splitting element 200 of the above embodiments on the light emitting side of the OLED display panel, and the first unit 210 is disposed corresponding to the first sub-pixel 121, and the second unit 220 is disposed corresponding to the second sub-pixel 122, which is not described herein again.

In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. In case of conflict, the embodiments and features of the embodiments in the present application may be combined with each other, and the combination of the features of the embodiments and implementations is still within the protection scope of the present application. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display device, comprising:

the display device comprises a display layer and a light source, wherein the display layer comprises a substrate base plate, and a plurality of first sub-pixels and second sub-pixels which are arranged on the substrate base plate in an array mode, and the display layer is provided with a light emergent side;

a light splitting element disposed on the light exit side of the display layer, wherein the light splitting element includes a first unit disposed corresponding to the first sub-pixel and a second unit disposed corresponding to the second sub-pixel, the first unit includes a first protrusion and a first reflective layer, the second unit includes a second protrusion and a second reflective layer, the first protrusion and the second protrusion both protrude toward a side away from the substrate base plate, the first protrusion has a first reflective surface and a first exit surface, the first reflective surface is disposed at an angle α with the substrate base plate, the first reflective layer is disposed on the first reflective surface, an orthographic projection of the first reflective surface on the substrate base plate overlaps with an orthographic projection of the corresponding first sub-pixel on the substrate base plate, light emitted from the first sub-pixel can exit from the first exit surface after being reflected by the first reflective surface, the second protrusion has a second reflective surface and a second exit surface, the second reflective surface is disposed at an angle β with the substrate base plate, the second reflective surface is disposed on the second reflective surface, and the second reflective surface is disposed on the substrate base plate, the second reflective surface is disposed on the substrate, and the second reflective surface is disposed on the substrate, the second reflective surface is disposed on the substrate, and the substrate, the second reflective surface is disposed on the substrate, the second reflective surface, and the substrate, the second reflective surface is disposed on the substrate, and the substrate, the second reflective surface is disposed on the substrate, and the substrate;

and the light blocking layer is arranged on one side of the light splitting element close to the substrate base plate, and the orthographic projection of the light blocking layer on the substrate base plate is at least partially overlapped with the orthographic projection of the first emergent surface and the orthographic projection of the second emergent surface on the substrate base plate.

2. The display device according to claim 1, wherein the first sub-pixels and the second sub-pixels are alternately arranged.

3. The display device according to claim 1, wherein an orthographic projection of the first reflective layer on the substrate base plate is adjacent to an orthographic projection of the light-blocking layer on the substrate base plate; and/or

The orthographic projection of the second reflecting layer on the substrate base plate is adjacent to the orthographic projection of the light blocking layer on the substrate base plate.

4. The display device according to claim 1, wherein the first protrusion further comprises a first connection face connecting the first reflection face and the first exit face, and an area ratio of an orthographic projection of the first connection face on the substrate base plate to an orthographic projection of the first protrusion on the substrate base plate is less than 5%; and/or

The second protrusion further comprises a second connecting surface connected with the second reflecting surface and the second emergent surface, and the area ratio of the orthographic projection of the second connecting surface on the substrate base plate to the orthographic projection of the second protrusion on the substrate base plate is less than 5%.

5. The display device according to claim 1, wherein the first protrusion is a first prism, the second protrusion is a second prism, the cross section of the first prism is a first isosceles triangle, the cross section of the second prism is a second isosceles triangle, the first reflective layer is disposed on a side surface of the first isosceles triangle of the first prism where the base is located, and the second reflective layer is disposed on a side surface of the second isosceles triangle of the second prism where the base is located.

6. The display device according to claim 5, wherein a vertex angle θ of the first isosceles triangle₁Satisfies the following conditions: 0 DEG < theta₁≤60°；

The vertex angle theta of the second isosceles triangle₂Satisfies the following conditions: 0 DEG < theta₂≤60°。

7. The display device according to claim 5, wherein the first prism is the same as the second prism.

8. The display device according to claim 1, further comprising a color resist layer, wherein the color resist layer comprises a plurality of color resist units arranged corresponding to the first sub-pixel and the second sub-pixel, a black matrix is arranged between the color resist units, and orthographic projections of the first unit and the second unit on the color resist layer cover each color resist unit.

9. The display device according to claim 8, wherein orthographic projections of the first unit and the second unit on the color-resistance layer coincide with positions of the color-resistance units; or

The orthographic projection edges of the first unit and the second unit on the color resistance layer are positioned between two adjacent color resistance units.

10. The display device according to claim 8, wherein part of the black matrix is multiplexed as the light-blocking layer.

11. The display device according to claim 5, wherein the light splitting element further comprises a transparent protective layer disposed on a side of the first unit and the second unit away from the substrate, and light emitted from the first unit and the second unit is emitted through the transparent protective layer to a refractive index n₀The first light-transmitting medium of (1).

12. The display device according to claim 11, wherein the transparent protection layer fills a refractive index n of the transparent protection layer in a region where the first cell and the second cell face away from the substrate₂And the refractive index n of the first light-transmitting medium₀Satisfies the following conditions: n is₀≤n₂。

13. The display device according to claim 12, wherein the apex angles of the first isosceles triangle and the second isosceles triangle are each θ, and wherein the refractive index n of the transparent protective layer is₂Satisfies the following conditions: n is₂＜n₀/sinθ。

14. The display device according to claim 11, wherein the first prisms and the second prisms are alternately arranged, a region of one side of each of the first reflective surface and the second reflective surface facing away from the substrate is filled with a reflective material, and the transparent protective layer is adhered to one side of each of the first prisms and the second prisms facing away from the substrate through the reflective material.

15. The display device according to claim 14, wherein a region between the first exit surface and the second exit surface adjacent to each other has a refractive index n₃A refractive index n of the second light-transmitting medium₃Refractive index n of the transparent protective layer₂And the refractive index n of the first light-transmitting medium₀Satisfies the following conditions: n is₀≤n₃≤n₂。

16. The display device according to claim 1, further comprising a first polarizer and a second polarizer respectively located on both sides of the display layer, wherein the second polarization is located on a side of the display layer facing away from the substrate;

the light splitting element is positioned on one side of the second polarizer, which is far away from the display layer.

17. The display device according to claim 2, wherein the first sub-pixels and the second sub-pixels are equal in number, the first sub-pixels include a first red sub-pixel, a first green sub-pixel and a first blue sub-pixel, the second sub-pixels include a second red sub-pixel, a second green sub-pixel and a second blue sub-pixel, the light of the first red sub-pixel, the light of the first green sub-pixel and the light of the first blue sub-pixel are emitted in the same direction after passing through the corresponding first units, and the light of the second red sub-pixel, the light of the second green sub-pixel and the light of the second blue sub-pixel are emitted in the same direction after passing through the corresponding second units.