Display substrate and display device

Abstract

The utility model provides a display substrate and a display device. The display substrate comprises a substrate, and a light-emitting layer is arranged on one side of the substrate; the color film layer is located on one side of the light-emitting layer away from the substrate; the regulation and control layer is located on the side, away from the substrate, of the color film layer, the regulation and control layer comprises a plurality of regulation and control protrusions arranged at intervals, the micro lens layer is located on the side, away from the substrate, of the color film layer, and the micro lens layer comprises a plurality of micro lenses arranged in an array mode; wherein on a plane perpendicular to the display substrate, the regulation and control bulge comprises a first plane and a second plane, the first plane and the second plane intersect to form an obtuse angle, and the orthographic projection of the vertex of the obtuse angle on the substrate is at least partially overlapped with the orthographic projection of at least one micro lens on the substrate; in this way, the emergent light cannot be emitted to the light emitting direction of the display substrate, so that the emergent light emitted from the regulation and control protrusions cannot generate crosstalk on light normally emitted from the interval between every two adjacent regulation and control protrusions, and large-view-angle color cast is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display substrate and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) uses organic light-emitting materials as light sources, which can easily meet the market's requirements for high pixel density, high contrast, low power consumption and fast response speed. However, existing OLED display devices are prone to crosstalk of various light outputs, resulting in impure monochromatic color deviation at a wide viewing angle, which reduces the user's visual experience. Utility Model Content

[0003] In view of this, an object of the present application is to provide a display substrate and a display device.

[0004] Based on the above objectives, the first aspect of the present application provides a display substrate, including:

[0005] A substrate, wherein a light-emitting layer is provided on one side of the substrate;

[0006] A color film layer, located on a side of the light-emitting layer away from the substrate;

[0007] A regulating layer is located on a side of the color filter layer away from the substrate, and the regulating layer includes a plurality of regulating protrusions arranged at intervals;

[0008] A microlens layer, located on a side of the color filter layer away from the substrate, the microlens layer comprising a plurality of microlenses arranged in an array;

[0009] Wherein, on a plane perpendicular to the display substrate, the regulating protrusion includes a first plane and a second plane, the intersection of the first plane and the second plane is an obtuse angle, and the orthographic projection of the vertex of the obtuse angle on the substrate at least partially overlaps with the orthographic projection of at least one of the microlenses on the substrate.

[0010] Optionally, a flat layer is further provided between the regulating layer and the microlens layer, and the flat layer completely covers the color filter layer and the regulating layer.

[0011] Optionally, the ratio of the thickness of the regulating layer to the thickness of the flat layer is 0.5:1 to 1:1.

[0012] Optionally, the regulating protrusion includes a plurality of side walls, and two opposite side walls of at least one of the regulating protrusions are both inclined surfaces.

[0013] Optionally, the regulating protrusion further includes a third plane, the third plane is a plane connecting the regulating protrusion and the color filter layer, and the orthographic projection of the first plane on the substrate is located within the orthographic projection of the third plane on the substrate.

[0014] Optionally, the angles between the two opposite side walls of the regulating protrusion and the third plane are respectively a first angle and a second angle, and the first angle and the second angle are both 50° to 70°.

[0015] Optionally, the color film layer includes a plurality of color filters, the interval between two adjacent control protrusions is a control interval, and the orthographic projection of the control interval on the substrate is located within the orthographic projection of one of the color filters on the substrate.

[0016] Optionally, the ratio of the area of ​​the orthographic projection of the regulating interval on the substrate to the area of ​​the orthographic projection of the corresponding color filter on the substrate is 1:10 to 9:10.

[0017] Optionally, the orthographic projection of each regulating protrusion on the substrate partially overlaps with the orthographic projections of two adjacent color filters on the substrate, and the regulating protrusion and one of the color filters are made of the same material.

[0018] Optionally, the multiple color filters include a first color filter; when the orthographic projection of the regulating protrusion on the substrate partially overlaps with the orthographic projection of the first color filter on the substrate, there is a gap between the first plane and the top surface of the flat layer away from the substrate, so that at least part of the light emitted from the first color filter directly passes through the gap and then emits from the flat layer.

[0019] Optionally, the first plane and the second plane close to the first color filter are both arranged to be inclined relative to a horizontal plane, wherein the direction of the inclined arrangement is a direction from the interval toward the first color filter.

[0020] Based on the same inventive concept, a second aspect of the present application provides a display device, comprising the display substrate described in any one of the first aspects above.

[0021] From the above description, it can be seen that the display substrate and the display device provided by the present application are provided with a regulating layer on the side of the color filter layer away from the substrate, the regulating layer includes a plurality of regulating protrusions arranged at intervals, and on a plane perpendicular to the display substrate, the regulating protrusion includes a first plane and a second plane, the intersection of the first plane and the second plane is an obtuse angle, and the orthographic projection of the vertex of the obtuse angle on the substrate overlaps at least partially with the orthographic projection of at least one of the microlenses on the substrate, so that the incident light entering the regulating protrusion is regulated by the regulating protrusion, and then the corresponding emergent light can enter the color filter layer or be emitted from both sides of the display substrate, so that the emergent light will not be emitted in the light emitting direction of the display substrate, so that the emergent light emitted from the regulating protrusion will not cause crosstalk to the light normally emitted from the interval between two adjacent regulating protrusions, and will not affect the large visual angle color deviation of the light, thereby improving the large visual angle color deviation and enhancing the user's visual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is an exemplary cross-sectional schematic diagram showing a substrate in the related art;

[0024] Figure 2 A simulation diagram of the optical path of light of a display substrate in the related art;

[0025] Figure 3 A first cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0026] Figure 4 A first optical path simulation diagram of light on a display substrate according to an embodiment of the present application;

[0027] Figure 5 A second optical path simulation diagram of light on the display substrate according to an embodiment of the present application;

[0028] Figure 6 A second cross-sectional schematic diagram of a display substrate according to an embodiment of the present application;

[0029] Figure 7 A third cross-sectional schematic diagram of the display substrate according to the embodiment of the present application;

[0030] Figure 8 A simulation diagram of the optical path of light when the protrusion is regulated to be an inverted trapezoidal structure;

[0031] Fig. 9 A simulation diagram of the optical path of light for regulating protrusions of the display substrate of an embodiment of the present application;

[0032] Fig.10 A fourth cross-sectional schematic diagram of the display substrate according to an embodiment of the present application;

[0033] Fig.11 is a fifth cross-sectional schematic diagram of the display substrate of the embodiment of the present application;

[0034] Fig.12 A third optical path simulation diagram of light of the display substrate according to an embodiment of the present application;

[0035] Fig.13 This is a test result diagram of the blue light brightness decay test of the embodiment of the present application, in which the vertical axis L-Decay represents the brightness decay;

[0036] Fig.14 This is a test result diagram of color deviation under a large viewing angle according to an embodiment of the present application. In the diagram, the vertical coordinate Du′v′ is the color deviation value.

[0037] In the figure: 1, substrate; 2, light-emitting layer; 3, encapsulation layer; 4, color film layer; 41, red filter protrusion; 42, green filter protrusion; 43, color filter; 431, first color filter; 432, second color filter; 433, third color filter; 5, flat layer; 51, interval; 6, microlens layer; 61, microlens; 7, adhesive layer; 8, cover plate; 9, regulation layer; 91, regulation protrusion; 911, first plane; 912, third plane; 913, second plane; 914, obtuse angle; 92, regulation interval. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] With the gradual development of augmented reality (AR) and virtual reality (VR), silicon-based OLED has gradually emerged as the best display device for AR / VR. Organic Light-Emitting Diode (OLED) uses organic light-emitting materials as the light source, and silicon-based OLED uses single-crystal silicon wafers as the driving backplane of OLED, which can easily achieve the high pixel density (referred to as "PPI"), high contrast, low power consumption and fast response speed required by AR / VR.

[0041] An exemplary schematic diagram of an existing OLED device is shown in FIG. Figure 1 As shown, Figure 1 In the stacked structure shown, from bottom to top are the light-emitting layer 2, the encapsulation layer 3, the color filter layer 4, the flat layer 5, the microlens layer 6, the bonding layer 7 and the cover plate 8. The color filter layer 4 includes a blue filter, a green filter and a red filter arranged in sequence. The blue filter, the green filter and the red filter cooperate with the light-emitting layer 2 that emits white light to realize the color light emission of the OLED device.

[0042] In the process of making the color filter 43, since three colors of filters need to be made, three coating, exposure and development processes are required in the manufacturing process. For example, in the manufacturing process, the manufacturing order is to make a blue filter, a red filter and a green filter in turn. This will result in that when making a red filter, part of the red filter will overlap the already made blue filter, and finally form a red filter protrusion 41. Then, when making a green filter, part of the green filter will overlap the already made red filter and blue filter, and finally form a green filter protrusion 42. Due to process reasons, the morphology of the existing red filter protrusion 41 and the green filter protrusion 42 is a lens-like structure, and the final structure is as follows. Figure 1 shown.

[0043] In this case, if Figure 2 As shown in Figure 1, there will be a problem of side light crosstalk path. Figure 2 The G light in the Figure 2 R light in the Figure 2 Taking the crosstalk of B light in the image as an example, the green light emitted from the green filter is deflected at a certain angle by the side wall of the microlens above the green filter and then enters the wide viewing angle, while the blue light and red light emitted from the blue filter and the red filter on both sides of the green filter are also deflected at a certain angle by the side wall of the microlens above the green filter and then enter the wide viewing angle. This causes the green light to be mixed with blue light and red light in the wide viewing angle, resulting in crosstalk of light and impure monochrome color at the wide viewing angle, affecting the color deviation of the display device at the wide viewing angle, and reducing the user's visual experience.

[0044] Therefore, how to avoid the crosstalk of light and improve the large viewing angle color deviation of the display device is an urgent problem to be solved.

[0045] Based on this, see Figure 3 and Figure 4 , the present application provides a display substrate, comprising:

[0046] A substrate 1, wherein a light-emitting layer 2 is provided on one side of the substrate 1;

[0047] A color filter layer 4 is located on a side of the light-emitting layer 2 away from the substrate 1;

[0048] A regulating layer 9 is located on a side of the color filter layer 4 away from the substrate 1, and the regulating layer 9 includes a plurality of regulating protrusions 91 arranged at intervals;

[0049] A microlens layer 6, located on a side of the color filter layer 4 away from the substrate 1, the microlens layer 6 includes a plurality of microlenses 61 arranged in an array;

[0050] Among them, on a plane perpendicular to the display substrate, the regulating protrusion 91 includes a first plane 911 and a second plane 913, the intersection of the first plane 911 and the second plane 913 is an obtuse angle 914, and the orthographic projection of the vertex of the obtuse angle 914 on the substrate 1 at least partially overlaps with the orthographic projection of at least one of the microlenses 61 on the substrate 1.

[0051] Specifically, the substrate 1 includes a substrate substrate and a driving circuit located on the substrate substrate. The substrate substrate can support and protect various components of the display substrate. The substrate substrate can be made of silicon-based materials, which are new materials developed based on silicon materials, including but not limited to germanium silicon materials, porous silicon, microcrystalline silicon, and other compound semiconductor materials heteroepitaxially grown on silicon substrate 1. The substrate substrate can also be formed of glass, quartz, ceramic or a flexible plastic material. For example, when the substrate substrate is formed of a plastic material, it can be formed of polyimide (PI). The substrate substrate can be flexible, stretchable, foldable, bendable and / or rollable, so the display substrate can also be flexible, stretchable, foldable, bendable and / or rollable.

[0052] A driving circuit (not shown) is arranged on the substrate, and the driving circuit may include a thin film transistor and a capacitor. The thin film transistor is arranged on the substrate. The thin film transistor may be a driving element of the display substrate. The thin film transistor includes an active layer, a gate electrode, a source electrode and a drain electrode.

[0053] The planarization layer is disposed on the thin film transistor. The planarization layer is used to remove the steps of the aforementioned structure and / or planarize the steps, thereby increasing the luminous efficiency of the light emitting element to be formed thereon. A contact hole overlapping at least some of the drain electrode is formed in the passivation layer.

[0054] The planarization layer may be formed of polyacrylate resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, and / or benzocyclobutene (BCB).

[0055] The light emitting layer 2 is disposed on the planarization layer. The light emitting layer 2 includes a first electrode layer, a light emitting material layer and a second electrode layer.

[0056] The first electrode layer is disposed on the planarization layer, and the first electrode layer may be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), etc., or of a metal such as lithium (Li), calcium (Ca), lithium fluoride / calcium (LiF / Ca), lithium fluoride / aluminum (LiF / Al), aluminum (Al), silver (Ag), magnesium (Mg), gold (Au), etc. The first electrode layer is electrically connected to the drain electrode of the thin film transistor via a contact hole formed in the planarization layer to serve as an anode of the light emitting element.

[0057] The light-emitting material layer is disposed on the first electrode layer. The light-emitting material layer may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer and an electron injection layer stacked in sequence, the hole injection layer is in contact with the first electrode layer, and the electron injection layer is in contact with the second electrode layer. Of course, in other example embodiments of the present application, the light-emitting material layer may include only a hole transport layer, a light-emitting material layer and an electron transport layer, and the light-emitting material layer may also be other structures, and its specific structure may be set as needed.

[0058] An encapsulation layer 3 is disposed on the side of the second electrode layer away from the substrate 1. The encapsulation layer 3 may be provided as a multilayer, and the encapsulation layer 3 may include an organic layer and an inorganic layer. The encapsulation layer 3 is disposed on the light-emitting side of the display substrate.

[0059] The color filter layer 4 is arranged on a side of the encapsulation layer 3 away from the substrate 1. The color filter layer 4 includes a plurality of color filters 43, and the plurality of color filters 43 are arranged in sequence. Figure 3 As shown, Figure 3 The color filter 43 where B is located can be a blue light filter. Figure 3 The color filter 43 where G is located can be a green light filter. Figure 3 The color filter 43 where R is located can be a red light filter.

[0060] It is worth noting that the “R”, “G” and “B” representing the colors in the embodiments and drawings of the present application are only used to exemplarily describe that the color filter layer 4 includes a plurality of color filters 43 of different colors, and are not used to limit the arrangement of the plurality of color filters 43 of different colors in the color filter layer 4. In specific implementation, the plurality of color filters 43 of different colors can be arranged according to actual needs, which is not limited here.

[0061] When the light emitted by the light-emitting layer 2 is white, the white light emitted from the light-emitting device will form green light, blue light and red light after passing through the green light filter, the blue light filter and the red light filter. In this way, the color light emission of the OLED device can be achieved through the cooperation of the color filter 43 and the light-emitting layer 2 that emits white light.

[0062] The regulating layer 9 is located on the side of the color filter layer 4 away from the substrate 1. The regulating layer 9 includes a plurality of regulating protrusions 91 arranged at intervals. There is a regulating gap 92 between two adjacent regulating protrusions 91. The orthographic projection of the regulating gap 92 on the color filter layer 4 is located in a color filter 43. The light emitted by the color filter 43 can pass through the regulating gap 92 and directly go in a direction away from the substrate 1 (that is, the light emitting direction of the display substrate). Figure 3 That is, the light emitted by the color filter 43 will not be affected by the regulating protrusion 91.

[0063] For the convenience of subsequent description, in this embodiment, the color filter 43 corresponding to the adjustment interval 92 is called the target light filter, and the light emitted from the target light filter and directly emitted in the direction away from the substrate 1 after passing through the adjustment interval 92 is called the target light (i.e. Figure 4 QW rays and ER rays in ).

[0064] On a plane perpendicular to the display substrate, the regulating protrusion 91 includes a first plane 911 and a second plane 913. The first plane 911 is a plane where the regulating protrusion 91 is away from the substrate 1, and the second plane 913 is a plane where at least one side wall of the regulating protrusion 91 is located. Specifically, for a regulating protrusion 91, the second plane 913 can be a plane where one side wall of the regulating protrusion 91 is located, a plane where two opposite side walls are located, or a plane where all side walls are located.

[0065] The intersection of the first plane 911 and the second plane 913 forms an obtuse angle 914, and the orthographic projection of the vertex of the obtuse angle 914 on the substrate 1 at least partially overlaps with the orthographic projection of at least one of the microlenses 61 on the substrate 1, so that the incident light entering the regulating protrusion 91 is refracted at the interface of the regulating protrusion 91, so that the regulating protrusion 91 effectively regulates the optical circuit of the incident light, and thus the corresponding emergent light can be injected into the color filter layer 4 or emitted from the two sides of the display substrate, so that the emergent light emitted from the regulating protrusion 91 will not be emitted in the light emitting direction of the display substrate, and thus the emergent light corresponding to the incident light entering the regulating protrusion 91 will not affect the front light emitting of the display substrate, thereby avoiding light crosstalk.

[0066] like Figure 4 As shown, the incident light is TY and the outgoing light is OP. At this time, the regulating protrusion 91 can regulate the outgoing light OP corresponding to the incident light TY incident therein, so that the outgoing light OP emitted from the regulating protrusion 91 directly enters the color filter layer 4.

[0067] like Figure 5As shown, the incident light is AS and the outgoing light is DF. At this time, the regulating protrusion 91 can regulate the outgoing light DF corresponding to the incident light AS incident therein, so that the outgoing light DF emitted from the regulating protrusion 91 is emitted from the side wall of the regulating protrusion 91 in a direction parallel to the color film layer 4, and then emitted from both sides of the display substrate.

[0068] In this way, at least part of the side incident light injected from the side wall of the regulating protrusion 91, and its corresponding outgoing light will only enter the color filter layer 4 or be emitted from the two sides of the display substrate, and the outgoing light will not pass through the regulating protrusion 91 and be emitted from the top surface of the regulating protrusion 91. In this way, the outgoing light corresponding to at least part of the side incident light injected into the regulating protrusion 91 will not generate crosstalk with the target light normally emitted from the regulating gap 92 in the direction away from the substrate 1, and will not affect the large visual color deviation of the target light, thereby improving the user's visual experience.

[0069] In the present application, a regulating layer 9 is provided on a side of the color filter layer 4 away from the substrate 1, and the intersection of the first plane 911 and the second plane 913 of the regulating protrusion 91 is controlled to form an obtuse angle 914, and the orthographic projection of the vertex of the obtuse angle 914 on the substrate 1 overlaps at least partially with the orthographic projection of at least one of the microlenses 61 on the substrate 1, so that the regulating protrusion 91 can regulate at least part of the outgoing light emitted from the regulating protrusion 91 to enter the color filter layer 4 or to be emitted from both sides of the display substrate, so that the outgoing light will not pass through the regulating protrusion 91 and then be emitted from the top surface of the regulating protrusion 91, so that the outgoing light emitted from the regulating protrusion 91 will not generate crosstalk with the light normally emitted from the interval between two adjacent regulating protrusions 91, and will not affect the large visual angle color deviation of the light, thereby improving the large visual angle color deviation and enhancing the user's visual experience.

[0070] In some embodiments, see Figure 3 and Figure 4 A flat layer 5 is further provided between the regulating layer 9 and the microlens layer 6. The flat layer 5 completely covers the color filter layer 4 and the regulating layer 9. The refractive index of the regulating layer 9 is greater than the refractive index of the flat layer 5, so as to regulate the optical path of the incident light entering the regulating protrusion 91, so that the corresponding output light enters the color filter layer 4 or is emitted from both sides of the display substrate.

[0071] Specifically, Figure 4 As shown, since the refractive index of the regulating layer 9 is different from that of the flat layer 5, the incident light TY entering the regulating layer will undergo a first refraction on the incident interface, and the refracted light YO after the first refraction will undergo a second refraction on the exit interface when it exits the regulating protrusion 91, and the refracted light OP after the second refraction is the final exiting light.

[0072] Since the refractive index of the regulating layer 9 is greater than the refractive index of the flat layer 5, during the first refraction, since the incident light TY enters the regulating layer 9 with a large refractive index from the flat layer 5 with a small refractive index, the refraction angle is smaller than the incident angle, so that the light ray YO after the first refraction will be deflected in the direction close to the substrate 1 (if the first refraction does not occur, the incident light TY will be emitted along the direction of the extended dotted line). During the second refraction, the incident light is the refracted light YO of the first refraction, and the refracted light YO enters the flat layer 5 with a small refractive index from the regulating layer 9 with a large refractive index. At this time, the refraction angle is greater than the incident angle, so that the light ray OP after the second refraction will be deflected in the direction close to the substrate 1 (if the second refraction does not occur, the refracted light YO will be emitted along the direction of the extended dotted line). The light ray OP after the second refraction is the outgoing light corresponding to the incident light TY, and the outgoing light TY directly enters the color filter layer 4 instead of being emitted from the top of the regulating protrusion 91 along the original direction.

[0073] Continue to see Figure 5 As shown, similar to the above process, due to the occurrence of two refractions, the regulating protrusion 91 regulates the direction of the outgoing light DF corresponding to the incident light AS, so that the outgoing light DF is emitted from both sides of the regulating protrusion 91, rather than being emitted in the direction away from the regulating protrusion 91 along the original direction.

[0074] After two refractions, the regulating protrusion 91 regulates the optical path of the incident light, changes the original direction of the emitted light, deflects the emitted light toward the substrate 1, and then directly enters the color filter layer 4, avoiding crosstalk between the emitted light and the target light.

[0075] Exemplarily, the refractive index of the planar layer 5 is 1.56-1.6, and the refractive index of the regulating layer 9 is 1.7-1.8.

[0076] In the present application, by limiting the relationship between the refractive index of the regulating protrusion 91 and the refractive index of the flat layer 5, the incident light entering the regulating protrusion 91 from the side wall of the regulating protrusion 91 undergoes two refractions, and both refractions cause the refracted light to be deflected toward the direction close to the substrate 1, so that the final output light can directly enter the color film layer 4 or be emitted from both sides of the display substrate, thereby avoiding crosstalk between the output light and the target light and improving the large viewing angle color deviation.

[0077] In some embodiments, see Figure 3 and Figure 6 , the ratio of the thickness of the regulating layer 9 to the thickness of the flat layer 5 is 0.5:1 to 1:1.

[0078] Specifically, when the ratio of the thickness of the regulating layer 9 to the thickness of the flat layer 5 is 0.5:1 to 1:1, it can ensure that most of the incident light entering from the side wall of the regulating protrusion 91 is deflected so as to enter the color film layer 4, ensuring that most of the incident light entering from the side wall will not cause crosstalk to the target light, thereby improving the large viewing angle color deviation.

[0079] When the ratio of the thickness of the regulating layer 9 to the thickness of the flat layer 5 is less than 0.5:1, the thickness of the regulating protrusion 91 is too small, so that most of the incident light entering from its side wall can be directly emitted from the gap between the regulating layer 9 and the upper surface of the flat layer 5. In this way, the regulating protrusion 91 cannot regulate the incident light entering from the side wall, and thus cannot effectively avoid crosstalk.

[0080] Exemplarily, the ratio of the thickness of the regulating layer 9 to the thickness of the planar layer 5 may be 0.5:1, 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1:1, etc.

[0081] like Figure 6 When the ratio of the thickness of the regulating layer 9 to the thickness of the flat layer 5 is 1:1, there is no gap between the first plane 911 of the regulating protrusion 91 and the upper surface of the flat layer 5, which can ensure that all the incident light entering from the side wall will pass through the regulating protrusion 91, and its optical path will be regulated, thereby effectively avoiding crosstalk.

[0082] In some embodiments, the regulating protrusion 91 includes a plurality of side walls, and two opposite side walls of at least one of the regulating protrusions 91 are both inclined surfaces.

[0083] Specifically, when the two opposite side walls of the regulating protrusion 91 are both inclined surfaces, since the inclination angle of the inclined surface is constant, all light passing through the side wall will be refracted at the side wall, and the optical path of all light can be effectively and regularly regulated. Specifically, when the two opposite side walls of the regulating protrusion 91 are both inclined surfaces, the incident light entering one of the side walls undergoes a first refraction at the side wall, and the refracted light after the first refraction undergoes a second refraction at the other side wall opposite to the side wall, and the refracted light after the second refraction is the outgoing light. After the second refraction, the outgoing light directly enters the color filter layer 4 to avoid crosstalk between the outgoing light and the target light, so as to improve the color deviation of the large viewing angle.

[0084] Compared with curved surfaces, inclined surfaces regulate light more regularly and uniformly. Therefore, when the two opposite side walls of the regulating protrusion 91 are both inclined surfaces, the existence of the two inclined surfaces can regularly and uniformly regulate the optical path of the incident light entering the inside of the regulating protrusion 91, so that all incident light is refracted twice at the side walls of the regulating protrusion 91, and the refraction on both sides will cause the refracted light to be deflected toward the direction close to the substrate 1, so that all outgoing light corresponding to the incident light will be directly deflected into the color film layer 4, avoiding crosstalk between the outgoing light and the target light, so as to improve the color deviation of large viewing angle. However, the regulating protrusion 91 of the lens-like structure formed by the existing process has curved side walls. The curved surfaces with different curvatures have different effects on the optical path of the incident light, so that it is impossible to regularly regulate the incident light, and it is also impossible to deflect most of the outgoing light, resulting in most of the outgoing light still being emitted from the light emitting direction, and ultimately causing the outgoing light to crosstalk with the target light, and causing impure monochromatic color at a large viewing angle, affecting the large viewing angle color deviation of the display device, and reducing the user's visual experience.

[0085] In some embodiments, Figure 7 As shown, the regulating protrusion 91 also includes a third plane 912, which is a plane connecting the regulating protrusion 91 and the color filter layer 4, and the orthographic projection of the first plane 911 on the substrate 1 is located within the orthographic projection of the third plane 912 on the substrate 1.

[0086] Specifically, the first plane 911 and the third plane 912 are both planes or inclined planes, so that the top surface, bottom surface and side walls of the regulating protrusion 91 are all planes or inclined planes. In addition, the orthographic projection of the first plane 911 on the base 1 is located within the orthographic projection of the third plane 912 on the base 1, so that the regulating protrusion 91 is a trapezoidal structure.

[0087] The regulating protrusion 91 with a trapezoidal structure makes the distance between the two opposite side walls of the regulating protrusion 91 gradually increase along the direction from the flat layer 5 to the substrate 1. At this time, the inclination direction of the side wall of the regulating protrusion 91 is fixed. Such an inclination direction can ensure that the incident light entering from one of the side walls can be refracted to the other side wall of the regulating protrusion 91 after the first refraction, and then a second refraction occurs at the other side wall. The light after the second refraction can be incident on the color film layer 4.

[0088] However, if the orthographic projection of the third plane 912 on the substrate 1 is located within the orthographic projection of the first plane 911 on the substrate 1, that is, the regulating protrusion 91 is an inverted trapezoidal structure, such as Figure 8As shown in the optical path schematic diagram, since the inclination direction of the side wall of the regulating protrusion 91 changes at this time, although the incident light will also undergo the first refraction at the side wall of the regulating protrusion 91, the second refraction may occur on the first plane 911 of the regulating protrusion 91, so that the final output light still emerges from the top of the regulating protrusion 91, causing the output light to still produce crosstalk with the target light.

[0089] In the present application, by controlling the morphology of the regulating protrusion 91, the regulating protrusion 91 can regularly regulate the incident light entering from its side wall to ensure that most of the outgoing light will enter the color film layer 4 and will not entangle the target light, thereby greatly improving the color deviation of the large viewing angle. However, the regulating protrusion 91 of the lens-like structure formed by the existing process, because the surface of the lens-like structure is a curved surface, the curvature at different positions on the curved surface is different, and different curvatures have different effects on the optical path of the incident light, so that it is impossible to regularly regulate the incident light, and it is also impossible to deflect most of the outgoing light, resulting in most of the outgoing light still being emitted from the light emitting direction, and ultimately causing the outgoing light to crosstalk with the target light, and causing the large viewing angle monochromatic color deviation to be impure, affecting the large viewing angle color deviation of the display device, and reducing the visual experience of the user.

[0090] In some embodiments, Fig. 9 As shown, the angles between the two opposite side walls of at least one of the regulating protrusions 91 and the third plane 912 are respectively a first angle and a second angle, and the first angle and the second angle are both 50° to 70°.

[0091] Specifically, the first angle is Fig. 9 The second angle is Fig. 9 β shown. Based on Fig. 9 As shown in the optical path diagram,

[0092]

[0093] Among them, e is the deflection angle of the light ray, and n is the refractive index of the regulating protrusion 91.

[0094] Specifically, taking the first angle and the second angle as 60°, the incident angle of the light as 45° to 85°, and the refractive index n of the regulated protrusion 91 as 1.7 as an example, based on the above formula, the final light deflection angle e is calculated to be 63° to 83°. When the light deflection angle e is within this range, the outgoing light can be directly incident into the color filter layer 4.

[0095] After a large number of simulation experiments, the inventors finally calculated that when the first angle and the second angle are both 50° to 70°, most of the outgoing light corresponding to the incident light can be directly emitted into the color filter layer 4 to avoid crosstalk with the target light.

[0096] In some embodiments, the ratio of the area of ​​the orthographic projection of the control space 92 on the substrate 1 to the area of ​​the orthographic projection of the corresponding color filter 43 on the substrate 1 is 1:10 to 9:10.

[0097] Specifically, since the regulating protrusion 91 will regulate the light incident therein, when the light emitted from the color filter 43 corresponding to the regulating interval 92 enters the regulating protrusion 91, the regulating protrusion 91 will also regulate the optical path of the light, so that the corresponding output light cannot be emitted from the top of the flat layer 5, resulting in the loss of the target light emitted by the color filter 43.

[0098] Therefore, in the present application, the ratio of the area of ​​the orthographic projection of the regulating gap 92 on the substrate 1 to the area of ​​the orthographic projection of the corresponding color filter 43 on the substrate 1 is controlled to be 1:10 to 9:10. At this time, the sizes of the regulating gap 92 and the regulating protrusion 91 are both appropriate. The regulating gap 92 of appropriate size can ensure that most of the light emitted from the color filter 43 corresponding to the regulating gap 92 can directly pass through the regulating gap 92 and then emit out of the flat layer 5. In this way, the setting of the regulating protrusion 91 will not have a significant impact on the light emitted from the color filter 43, and will not affect the wide-angle display of the target light. At the same time, the regulating protrusion 91 of appropriate size can regulate the light emitted by other color filters 43, so that the outgoing light corresponding to the incident light emitted by other color filters is directly emitted into the color film layer 4, avoiding crosstalk to the target light.

[0099] When the ratio of the area of ​​the orthographic projection of the control gap 92 on the substrate 1 to the area of ​​the orthographic projection of the corresponding color filter 43 on the substrate 1 is less than 1:10, the control gap 92 is too small. At this time, most of the light emitted from the color filter 43 corresponding to the control gap 92 cannot directly pass through the control gap 92 and then emit out of the flat layer 5, but will enter the control protrusion 91, and the control protrusion 91 will refract the light, resulting in the final output light being unable to be emitted from the top of the flat layer 5, reducing the light output of the target light.

[0100] When the ratio of the area of ​​the orthographic projection of the control interval 92 on the substrate 1 to the area of ​​the orthographic projection of the corresponding color filter 43 on the substrate 1 is greater than 9:10, the control interval 92 is too large and the control protrusion 91 is too small. At this time, although the light output of the target light can be ensured, the too small control protrusion 91 cannot effectively regulate the light emitted by other color filters, so that crosstalk cannot be effectively avoided.

[0101] Specifically, see Fig.10The regulating gap 92 allows most of the light emitted by the corresponding color filter 43 to directly pass through the regulating gap 92 and then exit the flat layer 5, while the regulating protrusion 91 can effectively regulate the light emitted by other color filters 43 to avoid crosstalk.

[0102] In some embodiments, the orthographic projection of each regulating protrusion 91 on the substrate 1 partially overlaps with the orthographic projections of two adjacent color filters 43 on the substrate 1 , and the regulating protrusion 91 and one of the color filters 43 are made of the same material.

[0103] Specifically, in the actual manufacturing process, the regulating protrusion 91 and one of the color filters 43 are made of the same material and are prepared using the same manufacturing process. In this way, when preparing the display substrate described in the present application, there is no need to add any additional processes, and it can be achieved only on the basis of the existing processes. This not only achieves the technical effect of preventing crosstalk and improving large viewing angle color deviation, but also avoids adding any additional processes and saves manufacturing costs.

[0104] In some embodiments, Fig.11 and Fig.12 As shown, the multiple color filters 43 include a first color filter 431, a second color filter 432 and a third color filter 433; when the orthographic projection of the regulating protrusion 91 on the substrate 1 partially coincides with the orthographic projection of the first color filter 431 on the substrate 1, there is a gap 51 between the first plane 911 and the top surface of the flat layer 5 away from the substrate 1, so that at least part of the light emitted from the first color filter 431 directly passes through the gap 51 and then emits out of the flat layer 5.

[0105] Furthermore, the first plane 911 and the second plane 913 close to the first color filter 431 are both inclined relative to the horizontal plane (i.e., the plane parallel to the substrate 1), wherein the direction of the inclined setting is from the interval 51 toward the first color filter 431. When the first plane 911 is inclined in this way, part of the light emitted from the first color filter 431 can directly pass through the interval 51 and then emit the flat layer 5, so that in the wide-angle output light of the target light, there will be part of the first color output light to supplement the brightness of the first color light in the wide-angle white light and improve the color deviation level of the wide-angle color. Exemplarily, the first color can be blue, the second color can be green, and the third color can be red.

[0106] In specific implementation, since the viewing effect of the human eye is best and the display effect is best when some blue light is mixed in the outgoing light, in the present application, the first plane 911 of the regulating protrusion 91 and the second plane 913 close to the blue light filter are set as inclined planes with a specific tilt direction, so that part of the blue light can be directly emitted, so that the outgoing light with some blue light can be mixed in the wide-angle outgoing light of the target light, thereby improving the display effect.

[0107] At the same time, compared with red light and green light, the brightness attenuation of blue light is more serious. Therefore, in the present application, the first plane 911 of the regulating protrusion 91 and the second plane 913 close to the blue light filter are set as inclined planes with a specific inclination direction, so that part of the blue light can be directly emitted, which can also increase the amount of blue light output and slow down the brightness attenuation of the blue light.

[0108] like Fig.13 As shown, after simulation experiments, setting the first plane 911 of the regulating protrusion 91 and the second plane 913 close to the blue light filter as inclined planes with a specific tilt direction can significantly improve the attenuation of blue light.

[0109] Further Fig.14 As shown, after simulation experiments, setting the first plane 911 of the regulating protrusion 91 and the second plane 913 close to the blue light filter as inclined planes with a specific tilt direction can also significantly improve the color deviation of the large viewing angle, such as Fig.14 As shown, compared with the Du′v′ value (i.e., color deviation value) of the white light before improvement, the Du′v′ value of the white light after improvement is significantly increased at the 0.025 position angle, indicating that setting the first plane 911 of the regulating protrusion 91 and the second plane 913 close to the blue light filter as a regulating protrusion 91 with an inclined surface in a specific tilt direction can not only improve the brightness attenuation of the blue light, but also significantly improve the color deviation angle of the large viewing angle, thereby enhancing the display effect.

[0110] In the present application, on the basis of curbing the brightness attenuation of red light and green light at the same wide viewing angle, the brightness of blue light at a wide viewing angle is increased to achieve the purpose of improving the color shift at a wide viewing angle. Similarly, any components of red light, blue light and green light at a wide viewing angle can be similarly adjusted according to specific circumstances, so that the wide viewing angle brightness attenuation of red light, blue light and green light tends to be consistent.

[0111] The present application also provides a method for preparing a display substrate, comprising:

[0112] A substrate 1 is provided, and a light-emitting layer 2 is prepared on one side of the substrate 1;

[0113] A color film layer 4 is prepared on a side of the light-emitting layer 2 away from the substrate 1;

[0114] A regulating layer 9 is prepared on a side of the color filter layer 4 away from the substrate 1, and the regulating layer 9 includes a plurality of regulating protrusions 91 arranged at intervals;

[0115] A microlens layer 6 is prepared on a side of the color filter layer 4 away from the substrate 1, and the microlens layer 6 includes a plurality of microlenses 61 arranged in an array;

[0116] Among them, on a plane perpendicular to the display substrate, the regulating protrusion 91 includes a first plane 911 and a second plane 913, the intersection of the first plane 911 and the second plane 913 is an obtuse angle 914, and the orthographic projection of the vertex of the obtuse angle 914 on the substrate 1 at least partially overlaps with the orthographic projection of at least one of the microlenses 61 on the substrate 1.

[0117] Specifically, when preparing the display substrate described in the present application, there is no need to add unnecessary preparation steps based on the existing process. It is only necessary to adjust the morphology of the regulating protrusion 91 under the premise of the existing preparation process so that the regulating protrusion 91 can regulate the light output direction of at least part of the incident light incident on the regulating protrusion 91, thereby improving the color deviation of the large viewing angle and avoiding crosstalk at a large viewing angle.

[0118] The present application provides a display device, comprising the display substrate described in any of the above embodiments or a display substrate prepared by the preparation method described in any of the above embodiments.

[0119] The display device can be a product with an image display function, for example, it can be: a monitor, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query equipment and monitors of e-government, banks, hospitals, power and other departments).

[0120] The display device has the technical effects described in any of the above embodiments, which will not be elaborated here.

[0121] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0122] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0123] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display substrate, characterized in that: include: A substrate, wherein a light-emitting layer is provided on one side of the substrate; A color film layer, located on a side of the light-emitting layer away from the substrate; A regulating layer is located on a side of the color filter layer away from the substrate, and the regulating layer includes a plurality of regulating protrusions arranged at intervals; A microlens layer, located on a side of the color filter layer away from the substrate, the microlens layer comprising a plurality of microlenses arranged in an array; Wherein, on a plane perpendicular to the display substrate, the regulating protrusion includes a first plane and a second plane, the intersection of the first plane and the second plane is an obtuse angle, and the orthographic projection of the vertex of the obtuse angle on the substrate at least partially overlaps with the orthographic projection of at least one of the microlenses on the substrate.

2. The display substrate according to claim 1, characterized in that: A flat layer is further provided between the regulating layer and the microlens layer, and the flat layer completely covers the color filter layer and the regulating layer.

3. The display substrate according to claim 2, characterized in that: The ratio of the thickness of the regulating layer to the thickness of the flat layer is 0.5:1 to 1:

1.

4. The display substrate according to claim 2, characterized in that: The regulating protrusion includes a plurality of side walls, and two opposite side walls of at least one of the regulating protrusions are both inclined surfaces.

5. The display substrate according to claim 4, characterized in that: The regulating protrusion further includes a third plane, which is a plane connecting the regulating protrusion and the color filter layer, and the orthographic projection of the first plane on the substrate is located within the orthographic projection of the third plane on the substrate.

6. The display substrate according to claim 5, characterized in that: The included angles between the two opposite side walls of the regulating protrusion and the third plane are respectively a first included angle and a second included angle, and the first included angle and the second included angle are both 50° to 70°.

7. The display substrate according to claim 2, characterized in that: The color film layer includes a plurality of color filters, the interval between two adjacent regulating protrusions is a regulating interval, and the orthographic projection of the regulating interval on the substrate is located within the orthographic projection of one of the color filters on the substrate.

8. The display substrate according to claim 7, characterized in that: The ratio of the area of ​​the orthographic projection of the regulating interval on the substrate to the area of ​​the orthographic projection of the corresponding color filter on the substrate is 1:10 to 9:

10.

9. The display substrate according to claim 7, characterized in that: The orthographic projection of each regulating protrusion on the substrate partially overlaps with the orthographic projections of two adjacent color filters on the substrate, and the regulating protrusion and one of the color filters are made of the same material.

10. The display substrate according to claim 7, characterized in that: The multiple color filters include a first color filter; when the orthographic projection of the regulating protrusion on the substrate partially overlaps with the orthographic projection of the first color filter on the substrate, there is a gap between the first plane and the top surface of the flat layer away from the substrate, so that at least part of the light emitted from the first color filter directly passes through the gap and then emits out of the flat layer.

11. The display substrate according to claim 10, characterized in that: The first plane and the second plane close to the first color filter are both arranged to be inclined relative to a horizontal plane, wherein the direction of the inclined arrangement is a direction from the interval toward the first color filter.

12. A display device, characterized in that: The display substrate comprises the display substrate according to any one of claims 1 to 11.

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