Display substrate and display device

Abstract

The invention provides a display substrate and a display device. The display substrate comprises a substrate body, a light-emitting device layer, a first flat layer, a barrier layer and a color filter layer, the light-emitting device layer, the first flat layer, the barrier layer and the color filter layer are sequentially away from the substrate body, the light-emitting device layer comprises a plurality of light-emitting structures, and the light-emitting structures are arranged in an array mode in the first direction and the second direction; the first flat layer comprises a plurality of first openings; the barrier layer comprises a plurality of barrier parts located in the first opening; the color filter layer comprises at least one first filter part and at least one second filter part, and the at least one first filter part and the at least one second filter part are adjacently arranged in the first direction; the plurality of blocking parts comprise at least one first blocking part, and orthographic projections of at least one first light filtering part and at least one second light filtering part which are adjacent in the first direction on the substrate body are at least partially overlapped with orthographic projections of the same first blocking part on the substrate body respectively; the colors of the first light filtering part, the second light filtering part and the first blocking part are different.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display substrate and a display device. Background Technology

[0002] Micro OLED (Organic Light-Emitting Diode) displays can achieve color display by combining white OLED light-emitting devices with a color filter (CF). In some Micro OLED displays, microlenses can be used to focus light and improve brightness at the viewing angle. By adjusting the offset and direction of the color filter and microlens relative to the anode opening, light can be emitted at different angles from different positions on the screen, achieving a customized viewing angle. However, during the microlens offset process, reverse light convergence can easily occur, leading to ghosting issues.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] In one aspect, a display substrate is provided, comprising: a substrate; a light-emitting device layer located on one side of the substrate, the light-emitting device layer including a plurality of light-emitting structures arranged in an array along a first direction and a second direction, the first direction and the second direction intersecting; a first planarization layer located on the side of the light-emitting device layer away from the substrate, the first planarization layer including a plurality of first openings; a blocking layer including a plurality of blocking portions respectively located in the plurality of first openings; and a color filter layer located on the side of the first planarization layer and the blocking layer away from the substrate, the color filter layer including a plurality of color filter portions, wherein the plurality of color filter portions include at least one first filter portion and at least one second filter portion, the at least one first filter portion and the at least one second filter portion being disposed adjacent to each other in a first direction; the plurality of blocking portions including at least one first blocking portion, the orthographic projections of at least one first filter portion and at least one second filter portion adjacent in the first direction on the substrate respectively at least partially overlapping the orthographic projection of the same first blocking portion on the substrate; and the first filter portion, the second filter portion and the first blocking portion having different colors.

[0005] According to some exemplary embodiments, the plurality of color filters further includes at least one third filter, at least one first filter and at least one third filter are disposed adjacent to each other in a first direction; the plurality of blocking portions includes at least one second blocking portion, the orthographic projections of at least one first filter and at least one third filter adjacent to each other in the first direction on the substrate respectively overlap at least partially with the orthographic projection of the same second blocking portion on the substrate; and the colors of the first filter, the third filter and the second blocking portion are all different.

[0006] According to some exemplary embodiments, the plurality of color filters further includes at least one third filter, at least one second filter and at least one third filter are disposed adjacent to each other in a first direction; the plurality of blocking portions includes at least one third blocking portion, the orthographic projections of at least one second filter and at least one third filter adjacent to each other in the first direction on the substrate respectively overlap at least partially with the orthographic projection of the same third blocking portion on the substrate; and the colors of the second filter, the third filter and the third blocking portion are all different.

[0007] According to some exemplary embodiments, the display substrate includes a display area, the display area including a central display area, a first side area and a second side area, the first side area and the second side area being located on opposite sides of the central display area; in a direction from the central display area to the first side area, the width of the plurality of blocking portions gradually increases in the first direction; and / or, in a direction from the central display area to the second side area, the width of the plurality of blocking portions gradually increases in the first direction.

[0008] According to some exemplary embodiments, at least one of the first blocking portions has a width in a first direction that is less than the width in a first direction of either the first filter portion or the second filter portion that overlaps with the projection of the first blocking portion; and / or, at least one of the second blocking portions has a width in a first direction that is less than the width in a first direction of either the first filter portion or the third filter portion that overlaps with the projection of the second blocking portion; and / or, at least one of the third blocking portions has a width in a first direction that is less than the width in a first direction of either the second filter portion or the third filter portion that overlaps with the projection of the third blocking portion.

[0009] According to some exemplary embodiments, at least one orthogonal projection of the first filter portion on the substrate and at least one orthogonal projection of the second filter portion on the substrate include a common first side, the width of the first side in a second direction being substantially equal to the width of the first blocking portion overlapping the projection of the first side in a second direction; and / or, at least one orthogonal projection of the first filter portion on the substrate and at least one orthogonal projection of the third filter portion on the substrate include a common second side, the width of the second side in a second direction being substantially equal to the width of the second blocking portion overlapping the projection of the second side in a second direction; and / or, at least one orthogonal projection of the second filter portion on the substrate and at least one orthogonal projection of the third filter portion on the substrate include a common third side, the width of the third side in a second direction being substantially equal to the width of the third blocking portion overlapping the projection of the third side in a second direction.

[0010] According to some exemplary embodiments, the blocking portion has a first thickness in a third direction, the first planarization layer has a second thickness in a third direction, the first thickness is less than or equal to the second thickness, and the third direction is perpendicular to both the first direction and the second direction.

[0011] According to some exemplary embodiments, the color of the first filter portion includes red; and / or, the color of the second filter portion includes green; and / or, the color of the third filter portion includes blue; and / or, the color of the first blocking portion includes blue; and / or, the color of the second blocking portion includes green; and / or, the color of the third blocking portion includes red.

[0012] According to some exemplary embodiments, the plurality of color filter portions and the plurality of light-emitting structures are respectively provided; the offset distance between the central axis of at least one of the color filter portions and the central axis of the corresponding light-emitting structure is greater than 0.

[0013] According to some exemplary embodiments, the display substrate further includes a light extraction layer located on the side of the color filter layer away from the substrate. The light extraction layer includes a plurality of lens structures, and the plurality of lens structures and the plurality of color filters are respectively disposed correspondingly. The offset distance between the central axis of at least one of the lens structures and the central axis of the corresponding color filter is greater than 0.

[0014] According to some exemplary embodiments, the central axis of at least one of the color filters is located between the central axis of the corresponding light-emitting structure and the central axis of the corresponding lens structure.

[0015] In another aspect, a display device is provided, comprising a display substrate as described in any of the preceding claims. Attached Figure Description

[0016] Other objects and advantages of this disclosure will become apparent from the following description of the disclosure with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the disclosure.

[0017] Figure 1 This is a schematic diagram of the structure of a display substrate according to an exemplary embodiment of the present disclosure.

[0018] Figure 2 This is a schematic diagram of the structure of a display substrate according to an exemplary embodiment of the present disclosure.

[0019] Figure 3 This is a schematic diagram of the structure of a display substrate according to an exemplary embodiment of the present disclosure.

[0020] Figure 4 A partial planar schematic diagram of a portion of the film layer of a display substrate according to an exemplary embodiment of the present disclosure.

[0021] Figure 5 This is a comparison diagram of the relationship between the viewing angle and the brightness attenuation ratio of different display substrates according to exemplary embodiments of the present disclosure.

[0022] Figure 6 This is a plan view of a display substrate according to an exemplary embodiment of the present disclosure.

[0023] Figure 7 This is a partial planar schematic diagram of a display substrate according to an exemplary embodiment of the present disclosure.

[0024] Figure 8 This is a structural block diagram of a display device according to an exemplary embodiment of the present disclosure.

[0025] It should be noted that, for clarity, the dimensions of layers, structures, or regions in the accompanying drawings used to describe embodiments of this disclosure may be enlarged or reduced; that is, these drawings are not drawn to actual scale. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0027] It should be noted that, for clarity and / or descriptive purposes, the dimensions and relative dimensions of components may be enlarged in the accompanying drawings. Therefore, the dimensions and relative dimensions of the individual components are not necessarily limited to those shown in the drawings. In the specification and accompanying drawings, the same or similar reference numerals indicate the same or similar parts.

[0028] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0029] In this document, the terms “approximately,” “about,” “approximately,” and other similar terms are used as terms of approximation rather than as terms of degree, and they are intended to account for inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. Taking into account factors such as process variations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), “about” or “approximately” as used herein includes stated values ​​and indicates that a particular value is within an acceptable range of deviation for one of ordinary skill in the art. For example, “about” may mean within one or more standard deviations, or within ±10% or ±5% of the stated value.

[0030] In this document, the directional terms "first direction" and / or "second direction" are used to describe different orientations of a display substrate or display device, such as the row direction and column direction of the display substrate. It should be understood that such representations are merely exemplary descriptions and not limitations of this disclosure.

[0031] In this article, "parallel" or "nearly parallel" refers to a state in which the angle formed by two straight lines, two planes, or a straight line and a plane is greater than -10° and less than 10°, and therefore also includes states in which the angle is greater than -5° and less than 5°. Similarly, "perpendicular" refers to a state in which the angle formed by two straight lines, two planes, or a straight line and a plane is greater than 80° and less than 100°, and therefore also includes states in which the angle is greater than 85° and less than 95°.

[0032] Figure 1 This is a schematic diagram of the structure of a display substrate according to an exemplary embodiment of the present disclosure.

[0033] Exemplary embodiments of this disclosure provide a display substrate 100. (Refer to...) Figure 1The display substrate 100 may include: a substrate 1; a light-emitting device layer 2 located on one side of the substrate 1; a color filter layer 5 located on the side of the light-emitting device layer 2 away from the substrate 1; and a light extraction layer 7 located on the side of the color filter layer 5 away from the substrate 1.

[0034] Exemplarily, the light-emitting device layer 2 may include multiple light-emitting structures 20. The inventors have discovered that micro-OLED display devices, using mono-silicon integrated circuits as the backplane and top-emitting OLED devices as the light source, have advantages such as small size, light weight, high contrast, fast response speed, and low power consumption. Based on this, in some exemplary embodiments, the light-emitting structure 20 may include a white OLED light-emitting device.

[0035] For example, the color filter layer 5 may include a plurality of color filter sections 50. For instance, the color filter section 50 may include a color filter, which can absorb light of a specific wavelength to allow monochromatic red, green, or blue light to pass through.

[0036] For example, multiple color filter units 50 can be respectively configured one-to-one with multiple light-emitting structures 20. For example, the multiple color filter units 50 may include a first filter unit 501, a second filter unit 502, and a third filter unit 503. The first filter unit 501 may include a red filter. Light emitted from the light-emitting structure 20 can form monochromatic red light after passing through the first filter unit 501. The second filter unit 502 may include a green filter. Light emitted from the light-emitting structure 20 can form monochromatic green light after passing through the second filter unit 502. The third filter unit 503 may include a blue filter. Light emitted from the light-emitting structure 20 can form monochromatic blue light after passing through the third filter unit 503. By utilizing the combination of the light-emitting device layer and the color filter layer, multiple different colors of monochromatic light can be formed, thereby achieving color display.

[0037] For example, the light extraction layer 7 may include multiple lens structures 70. For example, the multiple lens structures 70 may be respectively configured to correspond one-to-one with multiple color filter units 50. With such a design, the lens structures can be used to focus light and improve the brightness at the normal viewing angle.

[0038] In some embodiments, the orthographic projections of two adjacent color filters on the substrate may at least partially overlap. For example, at least one first filter 501 may cover at least a portion of the surface of an adjacent second filter 502 that is away from the substrate. As another example, at least one second filter 502 may cover at least a portion of the surface of an adjacent third filter 503 that is away from the substrate. With such a design, the gap between adjacent color filters can be reduced or even eliminated, preventing light from escaping from the gap region between adjacent color filters and causing optical crosstalk.

[0039] For example, continue to refer to Figure 1 The display substrate 100 may further include an encapsulation layer 3 located between the light-emitting device layer 2 and the color filter layer 5. Exemplarily, the encapsulation layer 3 may be formed using thin-film encapsulation technology. The encapsulation layer 3 can be used to isolate water and oxygen, protecting the light-emitting device layer 2 and thereby improving the lifespan of the display substrate.

[0040] For example, the display substrate 100 may further include: a first planarization layer 4 located between the encapsulation layer 3 and the color filter layer 5; a second planarization layer 6 located between the color filter layer 5 and the light extraction layer 7; an optical adhesive layer 8 located on the side of the light extraction layer 7 away from the substrate 1; and a cover glass 9 located on the side of the optical adhesive layer 8 away from the substrate 1.

[0041] In some embodiments, by adjusting the offset and direction of the color filter and lens structure relative to the light-emitting structure, different angles of light can be emitted from different positions on the screen, achieving a customized CRA angle effect. However, during the lens structure offset process, reverse light convergence can easily occur, causing the reverse brightness of the CRA to rise, resulting in ghosting defects after the display substrate is imaged, affecting the display optical effect.

[0042] It should be noted that, unless otherwise specified, the following references are used in conjunction with the text. Figure 2 The term "CRA" (Chief Ray Angle) refers to the angle between the principal ray emitted from the light-emitting structure (e.g., light-emitting structure 20) of a pixel and the normal direction of that pixel. For example, CRA can be represented by the maximum angle between the principal ray emitted from the light-emitting structure of a pixel and the normal direction of that pixel. The term "positive CRA" refers to the angle between the principal ray emitted from the light-emitting structure (e.g., light-emitting structure 20) of a pixel and the normal direction of that pixel. For example, positive CRA... RA can be represented by the maximum angle between the principal ray emitted from the light-emitting structure of a pixel and the normal direction of the pixel through the light extraction layer corresponding to the light-emitting structure of that pixel; the expression "reverse CRA" means the angle between the principal ray emitted from the light-emitting structure of a pixel (e.g., light-emitting structure 20) and the normal direction of the pixel through the light extraction layer (e.g., microlens) that does not correspond to the light-emitting structure of that pixel. For example, reverse CRA can be represented by the maximum angle between the principal ray emitted from the light-emitting structure of a pixel and the normal direction of the pixel through the light extraction layer that does not correspond to the light-emitting structure of that pixel.

[0043] Figure 2 This is a schematic diagram of the structure of a display substrate according to an exemplary embodiment of the present disclosure.

[0044] Exemplary, in some embodiments of this disclosure, reference is made to Figure 2 The multiple light-emitting structures 20 in the display substrate 100 can be respectively arranged in a one-to-one correspondence with the multiple color filter sections 50. The multiple lens structures 70 can be respectively arranged in a one-to-one correspondence with the multiple color filter sections 50.

[0045] Exemplarily, the display substrate may include a plurality of sub-pixels. At least one sub-pixel may include a light-emitting structure 20, a color filter 50, and a lens structure 70. Exemplarily, the display substrate may include a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. The plurality of light-emitting structures 20 may include a first light-emitting structure 201, a second light-emitting structure 202, and a third light-emitting structure 203. The plurality of color filters 50 may include a first filter 501, a second filter 502, and a third filter 503. The plurality of lens structures 70 may include a first lens structure 701, a second lens structure 702, and a third lens structure 703.

[0046] For example, at least one first sub-pixel sp1 may include a first light-emitting structure 201, a first filter 501, and a first lens structure 701. For example, at least one second sub-pixel sp2 may include a second light-emitting structure 202, a second filter 502, and a second lens structure 702. For example, at least one third sub-pixel sp3 may include a third light-emitting structure 203, a third filter 503, and a third lens structure 703.

[0047] For example, the first sub-pixel sp1 may include a red sub-pixel, the second sub-pixel sp2 may include a green sub-pixel, and the third sub-pixel sp3 may include a blue sub-pixel.

[0048] In some embodiments of this disclosure, the central axis L2 of the color filter section 50 and the central axis L1 of the corresponding light-emitting structure 20 can be offset, and the central axis L3 of the lens structure 70 and the central axis L2 of the corresponding color filter section 50 can be offset. This can change the angle (i.e., CRA angle) corresponding to the highest brightness of the sub-pixel, thereby achieving angle customization.

[0049] It should be noted that the central axis is a virtual straight line that divides an object into two symmetrical parts. Alternatively, the central axis is a virtual straight line passing through the center point of the object and perpendicular to the plane containing the object. In three-dimensional space, the central axis is a central symmetry plane or central symmetry axis. For example, the central axis of the color filter can be a virtual straight line passing through the center point of the color filter and perpendicular to the plane containing the color filter. In some embodiments of this disclosure, the color filter, the light-emitting structure, and the lens structure are arranged at intervals along the light emission direction, and the central axes of the color filter, the light-emitting structure, and the lens structure can all be parallel to the light emission direction of the display substrate.

[0050] It should also be noted that, in the embodiments of this disclosure, the light-emitting structure located in the same sub-pixel as the color filter is referred to as the light-emitting structure corresponding to the color filter; the lens structure located in the same sub-pixel as the color filter is referred to as the lens structure corresponding to the color filter; and the light-emitting structure located in the same sub-pixel as the lens structure is referred to as the light-emitting structure corresponding to the lens structure.

[0051] In some embodiments, continue to refer to Figure 2 When the central axis L3 of the lens structure 70 and the central axis L1 of the corresponding light-emitting structure 20 are offset, the following situation may occur: one lens structure 70 covers two light-emitting structures 20, causing one lens structure 70 to converge the forward light of the corresponding light-emitting structure 20 to the CRA direction, and at the same time, it will converge the reverse light of the light-emitting structure 20 in the adjacent sub-pixel to the non-CRA direction (i.e., the reverse CRA direction), thereby forming reverse CRA light in the adjacent sub-pixels, resulting in ghosting defects on the display substrate and affecting the display optical effect. For example, part of the light from the first light-emitting structure 201 in the first sub-pixel sp1 can pass through the first filter 501 and then be directed to the first lens structure 701, forming light in the CRA direction. Another part of the light from the first light-emitting structure 201 can pass through the third filter 503 in the adjacent third sub-pixel sp3 and be directed to the third lens structure 703, forming light in the non-CRA direction. The non-CRA direction light formed in the first sub-pixel sp1 may cause crosstalk to the CRA direction light in the adjacent sub-pixels, resulting in display ghosting and other defects.

[0052] In some embodiments of this disclosure, a blocking portion can be provided below the color filter to block light from non-CRA directions, thereby reducing the convergence of reverse light rays, which helps to reduce reverse CRA stray light and improve the display effect of the display substrate.

[0053] Exemplarily, embodiments of this disclosure provide a display substrate. The display substrate includes: a substrate; a light-emitting device layer located on one side of the substrate, the light-emitting device layer including a plurality of light-emitting structures arranged in an array along a first direction and a second direction, the first direction and the second direction intersecting; a first planarization layer located on the side of the light-emitting device layer away from the substrate, the first planarization layer including a plurality of first openings; a blocking layer including a plurality of blocking portions, the plurality of blocking portions being respectively located in the plurality of first openings; and a color filter layer located on the side of the first planarization layer and the blocking layer away from the substrate, the color filter layer including a plurality of color filter portions. The plurality of color filter portions include at least one first filter portion and at least one second filter portion, the at least one first filter portion and at least one second filter portion being disposed adjacent to each other in a first direction; the plurality of blocking portions include at least one first blocking portion, the orthographic projections of the at least one first filter portion and at least one second filter portion adjacent to each other in the first direction on the substrate at least partially overlap with the orthographic projection of the same first blocking portion on the substrate; and the first filter portion, the second filter portion, and the first blocking portion are all of different colors.

[0054] With this design, the first blocking part can block some of the light rays emitted by the light-emitting structure into the adjacent sub-pixels, which helps to reduce stray light and light crosstalk between adjacent sub-pixels, and improves the display effect of the display substrate.

[0055] Figure 3 This is a schematic diagram of the structure of a display substrate according to an exemplary embodiment of the present disclosure. Figure 4 A partial plan view of a portion of the film layer of a display substrate according to an exemplary embodiment of the present disclosure. Figure 5 This is a comparison diagram of the relationship between the viewing angle and the brightness attenuation ratio of different display substrates according to exemplary embodiments of the present disclosure.

[0056] By way of example, embodiments of this disclosure provide a display substrate 100. (See reference...) Figure 3 and Figure 4 The display substrate 100 may include: a substrate 1; a light-emitting device layer 2 located on one side of the substrate 1, the light-emitting device layer 2 may include a plurality of light-emitting structures 20, the plurality of light-emitting structures 20 may be arranged in an array along a first direction X and a second direction Y, the first direction X and the second direction Y intersect; a first planarization layer 4 located on the side of the light-emitting device layer 2 away from the substrate 1, the first planarization layer 4 may include a plurality of first openings VH1; a blocking layer 10, the blocking layer 10 may include a plurality of blocking portions 110, the plurality of blocking portions 110 may be respectively located in the plurality of first openings VH1; and a color filter layer 5 located on the side of the first planarization layer 4 and the blocking layer 10 away from the substrate 1, the color filter layer 5 may include a plurality of color filter portions 50.

[0057] For example, the plane formed by the first direction X and the second direction Y can be perpendicular to the light emission direction of the display substrate. For instance, the first direction X and the second direction Y can be perpendicular to each other.

[0058] For example, the plurality of color filter units 50 may include at least one first filter unit 501 and at least one second filter unit 502. The at least one first filter unit 501 and the at least one second filter unit 502 may be arranged adjacent to each other in the first direction X.

[0059] For example, the plurality of blocking portions 110 may include at least one first blocking portion 1101.

[0060] The orthographic projections of at least one first filter portion 501 and at least one second filter portion 502 adjacent in the first direction X onto the substrate can respectively at least partially overlap with the orthographic projection of the same first blocking portion 1101 onto the substrate.

[0061] For example, the colors of the first filter portion 501, the second filter portion 502, and the first blocking portion 1101 can be different.

[0062] Exemplarily, the display substrate may include a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. The plurality of light-emitting structures 20 may include a first light-emitting structure 201, a second light-emitting structure 202, and a third light-emitting structure 203. Exemplarily, at least one first sub-pixel sp1 may include a first light-emitting structure 201 and a first light-filtering portion 501. Exemplarily, at least one second sub-pixel sp2 may include a second light-emitting structure 202 and a second light-filtering portion 502. Exemplarily, at least one third sub-pixel sp3 may include a third light-emitting structure 203 and a third light-filtering portion 503.

[0063] For example, in at least one sub-pixel, at least a portion of the light emitted by the light-emitting structure 20 can be directed toward the corresponding color filter 50 to form outgoing light in the CRA direction, thereby achieving a display at a preset angle.

[0064] In some embodiments, in order to achieve an angle customization effect, the color filter and the corresponding light-emitting structure are offset, so that at least a portion of the light emitted by the light-emitting structure may be directed to the color filter in the adjacent sub-pixel, forming light in a non-CRA direction.

[0065] For example, refer to Figure 3Light emitted from at least one second light-emitting structure 202 corresponding to the second filter 502 toward the adjacent first sub-pixel sp1 needs to pass through the first blocking part 1101 and then through at least one of the first filter 501 and the second filter 502 before being emitted outward. Since the first filter 501, the second filter 502 and the first blocking part 1101 are all different colors, the transmittance of the first filter 501, the second filter 502 and the first blocking part 1101 for light of different wavelengths is different. This makes it difficult for light emitted from the second light-emitting structure toward the first sub-pixel (i.e., light not in the CRA direction) to pass through the first blocking part 1101 and then pass through the first filter 501 or the second filter 502.

[0066] With this design, the first blocking part can block light from non-CRA directions directed toward adjacent sub-pixels, which can reduce stray light from the reverse CRA without affecting the light output and viewing angle of the forward CRA.

[0067] For example, refer to Figure 5 The horizontal axis represents the viewing angle of the subpixel, and the vertical axis represents the attenuation ratio of the subpixel's brightness relative to its maximum brightness (e.g., brightness at the CRA angle) under different viewing angles. S1 illustrates the use of... Figure 2 The curves showing the relationship between the viewing angle and the brightness attenuation ratio of the display substrate in the embodiment shown in S2 illustrate the use of... Figure 3 The curve showing the relationship between the viewing angle and the brightness attenuation ratio of the display substrate in the illustrated embodiment.

[0068] The comparison shows that when the display substrate does not include a blocking part design, referring to the... Figure 2 and Figure 5 Light from directions other than CRA (e.g., light from -60° to 0°) may pass through the color filter in adjacent sub-pixels, forming reverse CRA stray light. As the angle increases, the proportion of reverse CRA stray light increases, which manifests as a brightness spike on the reverse CRA curve in the brightness decay curve. When a blocking part is placed below the color filter, referring to... Figure 3 and Figure 5 The blocking part can block light from non-CRA directions (e.g., light from -60° to 0°), effectively reducing stray light from the reverse CRA, and has virtually no impact on the light output and viewing angle of the forward CRA (e.g., 0° to 60°).

[0069] For example, in conjunction with reference Figure 3 and Figure 4 The plurality of color filter units 50 may further include at least one third filter unit 503. Exemplarily, at least one first filter unit 501 and at least one third filter unit 503 may be arranged adjacent to each other in the first direction X.

[0070] For example, the plurality of blocking portions 110 may include at least one second blocking portion 1102. The orthogonal projections of at least one first filter portion 501 and at least one third filter portion 503 adjacent in the first direction X on the substrate may at least partially overlap with the orthogonal projection of the same second blocking portion 1102 on the substrate.

[0071] For example, the colors of the first filter portion 501, the third filter portion 503, and the second blocking portion 1102 may be different.

[0072] For example, refer to Figure 3 Light emitted from at least one first light-emitting structure 201 corresponding to the first filter 501 towards the adjacent third sub-pixel sp3 direction needs to pass through the second blocking section 1102 and then through at least one of the first filter 501 and the third filter 503 before being emitted outward. Since the first filter 501, the third filter 503, and the second blocking section 1102 are all different colors, the transmittance of the first filter 501, the third filter 503, and the second blocking section 1102 for light of different wavelengths is different. This makes it difficult for light emitted from the first light-emitting structure towards the non-CRA direction to pass through the second blocking section 1102 and then through the first filter 501 or the third filter 503.

[0073] With this design, the second blocking part can block light that is not directed toward the CRA direction of the adjacent sub-pixel, which can further reduce the stray light of the reverse CRA without affecting the light output and viewing angle of the forward CRA.

[0074] For example, continue to refer to Figure 3 and Figure 4 The plurality of color filter units 50 may further include at least one third filter unit 503. For example, at least one second filter unit 502 and at least one third filter unit 503 may be arranged adjacent to each other in the first direction X.

[0075] For example, the plurality of blocking portions 110 may include at least one third blocking portion 1103. The orthogonal projections of at least one second filter portion 502 and at least one third filter portion 503 adjacent in the first direction X on the substrate may at least partially overlap with the orthogonal projection of the same third blocking portion 1103 on the substrate.

[0076] For example, the colors of the second filter 502, the third filter 503, and the third blocking part 1103 may be different.

[0077] For example, refer to Figure 3Light emitted from at least one third light-emitting structure 203 corresponding to the third filter 503 towards the adjacent second sub-pixel sp2 direction needs to pass through the third blocking section 1103 and then through at least one of the second filter 502 and the third filter 503 before being emitted outward. Since the second filter 502, the third filter 503, and the third blocking section 1103 are all different colors, the transmittance of the second filter 502, the third filter 503, and the third blocking section 1103 for light of different wavelengths is different. This makes it difficult for light emitted from the third light-emitting structure towards the non-CRA direction to pass through the third blocking section 1103 and then through the second filter 502 or the third filter 503.

[0078] With this design, the third blocking part can block light from non-CRA directions directed toward adjacent sub-pixels, which can further reduce reverse CRA stray light without affecting the forward CRA light output and viewing angle.

[0079] For example, the color of the first filter 501 may include red. For instance, the first filter 501 may include a red filter. For example, the color of the second filter 502 may include green. For instance, the second filter 502 may include a green filter. For example, the third filter 503 may include blue. For instance, the third filter 503 may include a blue filter.

[0080] For example, the first blocking part 1101, the second blocking part 1102 and the third blocking part 1103 may each have different colors.

[0081] For example, the color of the first blocking portion 1101 may include blue. For instance, the material of the first blocking portion 1101 may include a blue polymer adhesive.

[0082] For example, the color of the second blocking portion 1102 may include green. For instance, the material of the second blocking portion 1102 may include a green polymer adhesive.

[0083] For example, the color of the third blocking portion 1103 may include red. For instance, the material of the third blocking portion 1103 may include a red polymer adhesive.

[0084] This design allows for color display using three different colored color filters. At the same time, the three different colored blocking parts can block non-CRA light in different sub-pixels, thereby reducing light crosstalk between adjacent sub-pixels, improving ghosting, and enhancing display performance.

[0085] For example, continue to refer to Figure 3Multiple color filter units 50 can be respectively configured to correspond to multiple light-emitting structures 20. For example, the first filter unit 501 can be configured to correspond to the first light-emitting structure 201, the second filter unit 502 can be configured to correspond to the second light-emitting structure 202, and the third filter unit 503 can be configured to correspond to the third light-emitting structure 203.

[0086] For example, the offset distance between the central axis L2 of at least one color filter 50 and the central axis L1 of the corresponding light-emitting structure 20 can be greater than 0. With such a design, the CRA angle can be adjusted by utilizing the offset design of the color filter and the light-emitting structure to achieve a customized angle effect.

[0087] For example, the display substrate 100 may also include a light extraction layer 7, which may be located on the side of the color filter layer 5 away from the substrate 1.

[0088] For example, the light extraction layer 7 may include a plurality of lens structures 70, which may be respectively disposed corresponding to a plurality of color filter units 50. For example, the plurality of lens structures 70 may include a first lens structure 701, a second lens structure 702, and a third lens structure 703. The first lens structure 701 may be disposed corresponding to a first filter unit 501. The second lens structure 702 may be disposed corresponding to a second filter unit 502. The third lens structure 703 may be disposed corresponding to a third filter unit 503.

[0089] For example, the offset distance between the central axis L3 of at least one lens structure 70 and the central axis L2 of the corresponding color filter 50 can be greater than 0.

[0090] This design allows for two advantages: firstly, the brightness of the light emitted from the display substrate can be improved by utilizing the lens structure; secondly, the angle of the CRA can be further adjusted by utilizing the offset design of the light-emitting structure, the color filter, and the lens structure, thus achieving a customized angle effect.

[0091] For example, the central axis L2 of at least one color filter 50 may be located between the central axis L1 of the corresponding light-emitting structure 20 and the central axis L3 of the corresponding lens structure 70.

[0092] This design ensures that, within the same sub-pixel, the offset direction of the lens structure relative to the color filter is consistent with the offset direction of the color filter relative to the light-emitting structure. This improves the adjustment range of the CRA angle and achieves better angle customization.

[0093] For example, continue to refer to Figure 3The blocking portion 110 has a first thickness H1 in the third direction Z, and the first planarization layer 4 has a second thickness H2 in the third direction Z. The third direction Z is perpendicular to both the first direction X and the second direction Y. For example, the third direction Z can be parallel to the light emission direction of the display substrate.

[0094] For example, the first thickness H1 may be less than or equal to the second thickness H2.

[0095] In some embodiments, the first thickness H1 and the second thickness H2 may be substantially equal. For example, the ratio of the first thickness H1 to the second thickness H2 may be in the range of 0.8 to 1.2.

[0096] This design allows the blocking portion to be completely positioned within the first opening of the first planarization layer, which helps improve the flatness of the combined film layer of the blocking layer and the first planarization layer, improves the flatness of the upper color filter layer, and reduces stray light at the edges.

[0097] In some embodiments, a plurality of first openings can be created in the first planarization layer by etching, and then different colored adhesives can be filled into the first openings to form a barrier layer.

[0098] For example, the display substrate may further include: a second planarization layer 6 located between the color filter layer 5 and the light extraction layer 7; and an optical adhesive layer 8 located on the side of the light extraction layer 7 away from the substrate.

[0099] By way of example, the display substrate may also include a cover glass located on the side of the optical adhesive layer 8 away from the substrate.

[0100] In some embodiments, since the adjacent lens structures are spaced far apart in the second direction Y, there is essentially no reverse CRA stray light in the second direction Y. Therefore, the blocking portion only needs to be provided between adjacent color filter portions in the first direction X, and there is no need to provide a blocking portion between adjacent color filter portions in the second direction Y. This can reduce the difficulty of fabricating the blocking layer and reduce costs.

[0101] Exemplary, in some embodiments of this disclosure, reference is made to Figure 4At least one first blocking portion 1101 may have a width d1 in the first direction X that is smaller than the width of either the first filter portion 501 or the second filter portion 502 that overlaps with the projection of the first blocking portion 1101 in the first direction X. For example, the width d1 of at least one first blocking portion 1101 in the first direction X may be smaller than the width d4 of the first filter portion 501 that overlaps with the projection of the first blocking portion 1101 in the first direction X. As another example, the width d1 of at least one first blocking portion 1101 in the first direction X may be smaller than the width d5 ​​of the second filter portion 502 that overlaps with the projection of the first blocking portion 1101 in the first direction X.

[0102] For example, the width d2 of at least one second blocking portion 1102 in the first direction X may be smaller than the width of either the first filter portion 501 or the third filter portion 503 that overlaps with the projection of the second blocking portion 1102 in the first direction X. For example, the width d2 of at least one second blocking portion 1102 in the first direction X may be smaller than the width d4 of the first filter portion 501 that overlaps with the projection of the second blocking portion 1102 in the first direction X. As another example, the width d2 of at least one second blocking portion 1102 in the first direction X may be smaller than the width d6 of the third filter portion 503 that overlaps with the projection of the second blocking portion 1102 in the first direction X.

[0103] For example, the width d3 of at least one third blocking portion 1103 in the first direction X may be smaller than the width of either the second filter portion 502 or the third filter portion 503 that overlaps with the projection of the third blocking portion 1103 in the first direction X. For example, the width d3 of at least one third blocking portion 1103 in the first direction X may be smaller than the width d5 ​​of the second filter portion 502 that overlaps with the projection of the third blocking portion 1103 in the first direction X. As another example, the width d3 of at least one third blocking portion 1103 in the first direction X may be smaller than the width d6 of the third filter portion 503 that overlaps with the projection of the third blocking portion 1103 in the first direction X.

[0104] This design reduces the obstruction of light in the forward CRA direction by the blocking part, thereby improving the forward CRA light emission effect of the display substrate.

[0105] For example, continue to refer to Figure 4 The orthographic projections of at least one first filter portion 501 and at least one second filter portion 502 on the substrate include a common first side CL1. The width M1 of the first side CL1 in the second direction Y and the width M2 of the first blocking portion 1101 overlapping the projection of the first side CL1 in the second direction Y can be substantially equal. For example, the ratio of M1 / M2 can be in the range of 0.8 to 1.2.

[0106] For example, the orthographic projection of at least one first filter portion 501 on the substrate and the orthographic projection of at least one third filter portion 503 on the substrate include a common second side CL2. The width M3 of the second side CL2 in the second direction Y and the width M4 of the second blocking portion 1102 overlapping with the projection of the second side CL2 in the second direction Y can be substantially equal. For example, the ratio of M3 / M4 can be in the range of 0.8 to 1.2.

[0107] For example, the orthographic projection of at least one second filter portion 502 on the substrate and the orthographic projection of at least one third filter portion 503 on the substrate may include a common third side CL3. The width M5 of the third side CL3 in the second direction Y and the width M6 of the third blocking portion 1103 overlapping with the projection of the third side CL3 in the second direction Y may be substantially equal. For example, the ratio of M5 / M6 may be in the range of 0.8 to 1.2.

[0108] This design allows the blocking part to better block light from non-CRA directions in the first direction, thereby further reducing optical crosstalk between adjacent sub-pixels.

[0109] Figure 6 This is a plan view of a display substrate according to an exemplary embodiment of the present disclosure. Figure 7 This is a partial planar schematic diagram of a display substrate according to an exemplary embodiment of the present disclosure.

[0110] In some embodiments, as the CRA angle increases, the width of the plurality of blocking portions in the first direction can gradually increase, thereby better blocking the reverse CRA light.

[0111] Exemplary, in some embodiments of this disclosure, reference is made to Figure 6 and Figure 7 The display substrate may include a display area AA, which may include a central display area AA0, a first side area AA1, and a second side area AA2. For example, the first side area AA1 and the second side area AA2 may be located on opposite sides of the central display area AA0.

[0112] For example, the first side region AA1 may include a first sub-side region AA11, a third sub-side region AA13, a fifth sub-side region AA15 and a seventh sub-side region AA17, and the second side region AA2 may include a second sub-side region AA22, a fourth sub-side region AA24, a sixth sub-side region AA26 and an eighth sub-side region AA28.

[0113] For example, the first sub-side region AA11 and the second sub-side region AA22 can be located on opposite sides of the central display area AA0. For instance, the direction X1 of the second sub-side region AA22 toward the first sub-side region AA11 can be parallel to the first direction X.

[0114] For example, the third sub-side region AA13 and the fourth sub-side region AA24 can be located on opposite sides of the central display area AA0. For instance, the angle between the direction X3 of the fourth sub-side region AA24 toward the third sub-side region AA13 and the first direction X can be approximately 45°.

[0115] For example, the fifth sub-side region AA15 and the sixth sub-side region AA26 can be located on opposite sides of the central display area AA0. For instance, the angle between the direction X6 of the fifth sub-side region AA15 toward the sixth sub-side region AA26 and the second direction Y can be approximately 45°.

[0116] For example, the seventh sub-side region AA17 and the eighth sub-side region AA28 can be located on opposite sides of the central display area AA0. For instance, the direction X7 of the eighth sub-side region AA28 toward the seventh sub-side region AA17 can be parallel to the second direction Y.

[0117] For example, in the direction from the central display area AA0 to the first side area AA1 (e.g.) Figure 6 and Figure 7 In at least one of X1, X3, X5 and X7, the width of the plurality of blocking portions 110 in the first direction X can gradually increase.

[0118] For example, in the direction from the central display area AA0 to the first side area AA1, the blocking portion 111, the blocking portion 112, and the blocking portion 113 can gradually move away from the central display area AA0. For example, the width d12 of the blocking portion 112 in the first direction X can be greater than the width d11 of the blocking portion 111 in the first direction X, and the width d13 of the blocking portion 113 in the first direction X can be greater than the width d12 of the blocking portion 112 in the first direction X.

[0119] For example, in the direction from the central display area AA0 to the second side area AA2 (e.g.) Figure 6 and Figure 7 In at least one of X2, X4, X6 and X8, the width of the plurality of blocking portions 110 in the first direction X can gradually increase.

[0120] For example, in the direction from the central display area AA0 to the second side area AA2, the blocking portion 114, blocking portion 115, and blocking portion 116 can gradually move away from the central display area AA0. For example, the width d15 of the blocking portion 115 in the first direction X can be greater than the width d14 of the blocking portion 114 in the first direction X, and the width d16 of the blocking portion 116 in the first direction X can be greater than the width d15 of the blocking portion 115 in the first direction X.

[0121] This design allows for a corresponding increase in the size of the blocking portion in subpixels with larger CRA angles. On one hand, it increases the blocking area of ​​the blocking portion, which helps improve the blocking effect of the blocking portion on light from non-CRA angles. On the other hand, it ensures that the blocking portion has less impact on light from the forward CRA, resulting in better light emission from the forward CRA of the subpixel.

[0122] In some embodiments, the central axis of the light-emitting structure in a portion of the sub-pixels located in the central display area AA0 and the central axis of the corresponding color filter may not be angularly offset, so a blocking portion may not be required.

[0123] Figure 8 This is a structural block diagram of a display device according to an exemplary embodiment of the present disclosure.

[0124] By way of example, embodiments of this disclosure also provide a display device 200. (Refer to...) Figure 8 The display device 200 may include the display substrate 100 as described in any of the preceding embodiments. The display device may include, but is not limited to, any product or component with a display function, such as electronic paper, mobile phone, tablet computer, monitor, laptop computer, digital photo frame, or navigator. It should be understood that this display device has the same beneficial effects as the display substrate provided in the foregoing embodiments.

[0125] While some embodiments of the general concept of this disclosure have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general concept of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display substrate, characterized in that, include: Substrate; A light-emitting device layer is located on one side of the substrate. The light-emitting device layer includes a plurality of light-emitting structures, which are arranged in an array along a first direction and a second direction, and the first direction and the second direction intersect. A first planarization layer is located on the side of the light-emitting device layer away from the substrate, and the first planarization layer includes a plurality of first openings; A barrier layer, the barrier layer comprising a plurality of barrier portions, the plurality of barrier portions being respectively located in the plurality of first openings; and A color filter layer is located on the side of the first planarization layer and the barrier layer away from the substrate, and the color filter layer includes a plurality of color filter sections. The plurality of color filter units include at least one first filter unit and at least one second filter unit, wherein at least one first filter unit and at least one second filter unit are arranged adjacent to each other in a first direction; The plurality of blocking portions includes at least one first blocking portion, wherein the orthographic projections of at least one first filter portion and at least one second filter portion adjacent in a first direction on the substrate respectively overlap at least partially with the orthographic projection of the same first blocking portion on the substrate. as well as The first filter, the second filter, and the first blocking part are all different colors.

2. The display substrate according to claim 1, wherein, The plurality of color filters further includes at least one third filter, wherein at least one first filter and at least one third filter are arranged adjacent to each other in a first direction; The plurality of blocking portions includes at least one second blocking portion, wherein the orthographic projections of at least one first filter portion and at least one third filter portion adjacent in the first direction on the substrate respectively overlap at least partially with the orthographic projection of the same second blocking portion on the substrate; as well as The first filter, the third filter, and the second blocking part are all different colors.

3. The display substrate according to claim 1 or 2, wherein, The plurality of color filter units further includes at least one third filter unit, and at least one second filter unit and at least one third filter unit are arranged adjacent to each other in a first direction; The plurality of blocking portions includes at least one third blocking portion, wherein the orthographic projections of at least one second filter portion and at least one third filter portion adjacent in the first direction on the substrate respectively overlap at least partially with the orthographic projection of the same third blocking portion on the substrate; as well as The second filter, the third filter, and the third blocking part are all different colors.

4. The display substrate according to any one of claims 1-3, wherein, The display substrate includes a display area, which includes a central display area, a first side area, and a second side area, wherein the first side area and the second side area are located on opposite sides of the central display area. In the direction from the central display area to the first side area, the width of the plurality of blocking portions gradually increases in the first direction; and / or, in the direction from the central display area to the second side area, the width of the plurality of blocking portions gradually increases in the first direction.

5. The display substrate according to claim 3, wherein, At least one of the first blocking portions has a width in the first direction that is less than the width in the first direction of either the first filter portion or the second filter portion that overlaps with the projection of the first blocking portion; and / or, At least one of the second blocking portions has a width in the first direction that is less than the width in the first direction of either the first filter portion or the third filter portion that overlaps with the projection of the second blocking portion; and / or, At least one of the third blocking portions has a width in the first direction that is less than the width in the first direction of either the second filter portion or the third filter portion that overlaps with the projection of the third blocking portion.

6. The display substrate according to claim 5, wherein, The orthographic projection of at least one of the first filter portions on the substrate and the orthographic projection of at least one of the second filter portions on the substrate include a common first side, the width of the first side in the second direction and the width of the first blocking portion overlapping the projection of the first side in the second direction are substantially equal. And / or, The orthographic projection of at least one of the first filter portions on the substrate and the orthographic projection of at least one of the third filter portions on the substrate include a common second side, the width of the second side in the second direction and the width of the second blocking portion overlapping the projection of the second side in the second direction are substantially equal. And / or, The orthographic projection of at least one of the second filter portions on the substrate and the orthographic projection of at least one of the third filter portions on the substrate include a common third side, the width of the third side in the second direction and the width of the third blocking portion overlapping the projection of the third side in the second direction are substantially equal.

7. The display substrate according to any one of claims 1-6, wherein, The blocking portion has a first thickness in a third direction, the first planarization layer has a second thickness in a third direction, the first thickness is less than or equal to the second thickness, and the third direction is perpendicular to both the first direction and the second direction.

8. The display substrate according to claim 3, wherein, The color of the first filter portion includes red; and / or, the color of the second filter portion includes green; and / or, the color of the third filter portion includes blue; and / or, the color of the first blocking portion includes blue; and / or, the color of the second blocking portion includes green; and / or, the color of the third blocking portion includes red.

9. The display substrate according to any one of claims 1-8, wherein, The plurality of color filters and the plurality of light-emitting structures are respectively provided; The offset distance between the central axis of at least one of the color filter portions and the central axis of the corresponding light-emitting structure is greater than 0.

10. The display substrate according to any one of claims 1-9, wherein, The display substrate further includes a light extraction layer, which is located on the side of the color filter layer away from the substrate. The light extraction layer includes a plurality of lens structures, and the plurality of lens structures and the plurality of color filters are respectively disposed accordingly. as well as The offset distance between the central axis of at least one of the lens structures and the central axis of the corresponding color filter is greater than 0.

11. The display substrate according to claim 10, wherein, The central axis of at least one of the color filters is located between the central axis of the corresponding light-emitting structure and the central axis of the corresponding lens structure.

12. A display device, characterized in that, Includes the display substrate as described in any one of claims 1-11.

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