Display substrate, manufacturing method therefor, and display apparatus

Abstract

Provided is a display substrate, comprising: a base substrate; a plurality of pixel units arranged in an array in a display region, each pixel unit comprising a plurality of sub-pixels, and each sub-pixel comprising a sub-pixel opening defined by a pixel defining layer provided on the base substrate; and a plurality of sub-pixel lenses arranged in an array on the side of the pixel defining layer away from the base substrate. Each pixel unit comprises at least two sub-pixels of the same color. The orthographic projections of the sub-pixel openings on the base substrate are parallelograms, and the orthographic projections of the sub-pixel lenses on the base substrate are circles, the orthographic projection of each sub-pixel opening on the base substrate being located in the orthographic projection of the corresponding sub-pixel lens on the base substrate. The adjacent side edges of every two adjacent sub-pixel openings are arranged in parallel. A first distance D1 is provided between the adjacent side edges of the adjacent sub-pixel openings, and a second distance D2 is provided between the nearest points between the adjacent sub-pixel lenses, the second distance D2 being less than the first distance D1.

Description

Display substrate, manufacturing method thereof, and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and particularly to a display substrate and a manufacturing method thereof, and a display device. Background Art

[0002] OLED display technology is maturing, but certain issues remain. For example, OLED pixels have low brightness, and as mobile devices and other devices demand ever-higher pixel density, the pixel aperture ratio is also limited. While increasing the current to improve pixel brightness is a common technique, this significantly reduces the lifespan of the display device. Adding a lens to the OLED to increase brightness reduces the pixel density of the display device, making it impossible to design a high-brightness, high-aperture ratio display device.

[0003] The above information disclosed in this section is only for understanding the background of the technical concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art.

[0004] Summary of the Invention

[0005] In one aspect, a display substrate is provided, which has a display area and includes: a base substrate; a plurality of pixel units arranged in an array within the display area, each pixel unit including a plurality of sub-pixels, the sub-pixels including sub-pixel openings defined by a pixel defining layer arranged on the base substrate; a plurality of sub-pixel lenses arranged in an array on a side of the pixel defining layer away from the base substrate, the pixel defining layer on a side of the sub-pixel lens close to the base substrate having corresponding sub-pixel openings; wherein the plurality of sub-pixels included in each pixel unit include at least two sub-pixels of the same color, the orthographic projection of the sub-pixel opening on the base substrate is a parallelogram, the orthographic projection of the sub-pixel lens on the base substrate is a circle, and the orthographic projection of the sub-pixel opening on the base substrate is located within the orthographic projection of the corresponding sub-pixel lens on the base substrate; adjacent sides of two adjacent sub-pixel openings are arranged in parallel, and the adjacent sides of adjacent sub-pixel openings have a first distance D1; the nearest points between adjacent sub-pixel lenses have a second distance D2, and the second distance D2 is less than the first distance D1.

[0006] In some exemplary embodiments of the present disclosure, diameters of orthographic projections of the plurality of sub-pixel lenses on the base substrate are the same.

[0007] In some exemplary embodiments of the present disclosure, the center of the sub-pixel lens coincides with the orthographic projection of the center of the corresponding sub-pixel opening on the substrate.

[0008] In some exemplary embodiments of the present disclosure, each pixel unit includes two first-color sub-pixels having the same color, a second-color sub-pixel having a different color from the first-color sub-pixel, and a third-color sub-pixel having a color different from that of the first sub-color pixel and the second sub-pixel; the first sub-pixel lens corresponding to the first-color sub-pixel has a first center, the second sub-pixel lens corresponding to the second-color sub-pixel has a second center, and the third sub-pixel lens corresponding to the third-color sub-pixel has a third center, and the first center, the second center, and the third center are connected in sequence to form a square.

[0009] In some exemplary embodiments of the present disclosure, the sub-pixels included in the multiple pixel units are arranged at intervals in a first direction and a second direction, the first direction and the second direction intersect, and the first distance D1 includes: a first direction distance D11 of adjacent sides of adjacent sub-pixels in the first direction; and a second direction distance D12 of adjacent sides of adjacent sub-pixels in the second direction; the second direction distance D12 is greater than or equal to the first direction distance D11.

[0010] In some exemplary embodiments of the present disclosure, the first color sub-pixel includes a first sub-pixel opening, the second color sub-pixel includes a second sub-pixel opening, and the third color sub-pixel includes a third sub-pixel opening; the area S1 of the first sub-pixel opening, the area S2 of the second sub-pixel opening, and the area S3 of the third sub-pixel opening satisfy the following relationship: S1≥S2≥S3.

[0011] In some exemplary embodiments of the present disclosure, an orthographic projection of the first sub-pixel opening on the base substrate is inscribed in an orthographic projection of the first sub-pixel lens on the base substrate.

[0012] In some exemplary embodiments of the present disclosure, an orthographic projection of the second sub-pixel opening on the base substrate is inscribed in an orthographic projection of the second sub-pixel lens on the base substrate.

[0013] In some exemplary embodiments of the present disclosure, an orthographic projection of the third sub-pixel opening on the base substrate is inscribed in an orthographic projection of the third sub-pixel lens on the base substrate.

[0014] In some exemplary embodiments of the present disclosure, the display substrate further includes: an anode layer, which is arranged between the pixel defining layer and the base substrate, the orthographic projection of the sub-pixel opening on the base substrate is located within the orthographic projection of the anode layer on the base substrate, and the anode layer includes: a first anode corresponding to the first color sub-pixel; a second anode corresponding to the second color sub-pixel; and a third anode corresponding to the third color sub-pixel; the orthographic projections of the first anode, the second anode, and the third anode on the base substrate do not overlap.

[0015] In some exemplary embodiments of the present disclosure, the orthographic projection of the first sub-pixel opening of the first color sub-pixel of the same color in each pixel unit on the base substrate is located within the orthographic projection of the same first anode on the base substrate.

[0016] In some exemplary embodiments of the present disclosure, the first anode includes a first sub-anode corresponding to one of the first color sub-pixels, and a second sub-anode corresponding to another of the first color sub-pixels; the orthographic projections of the first sub-anode and the second sub-anode on the substrate do not overlap.

[0017] In some exemplary embodiments of the present disclosure, the display substrate further includes: a control circuit, arranged between the anode layer and the base substrate, the control circuit including a first control sub-circuit for controlling the conduction state of the first sub-anode, and a second control sub-circuit for controlling the conduction state of the second sub-anode.

[0018] In some exemplary embodiments of the present disclosure, the control circuit is configured to: control the first sub-anode to be turned on through a first control sub-circuit, and when the current flowing through the first sub-anode is greater than or equal to half of the maximum current, control the second sub-anode to be turned on through a second control sub-circuit.

[0019] In some exemplary embodiments of the present disclosure, the control circuit is configured to: during a first time period, control the first sub-anode to be conductive through the first control sub-circuit, and control the second sub-anode to be non-conductive through the second control sub-circuit; and during a second time period, control the first sub-anode to be non-conductive through the first control sub-circuit, and control the second sub-anode to be conductive through the second control sub-circuit.

[0020] In some exemplary embodiments of the present disclosure, the first color sub-pixel includes a blue sub-pixel, the second color sub-pixel includes a green sub-pixel, and the third color sub-pixel includes a red sub-pixel; wherein the ratio S2 / S3 is in the range of 1 to 2.5.

[0021] In some exemplary embodiments of the present disclosure, an orthographic projection of the sub-pixel opening on the base substrate is a square or a rectangle.

[0022] In some exemplary embodiments of the present disclosure, the orthographic projection of the sub-pixel opening on the substrate substrate has a first side edge close to the adjacent sub-pixel opening; the orthographic projection of the sub-pixel lens corresponding to the sub-pixel opening on the substrate substrate has a first arc edge close to the adjacent sub-pixel lens, the first side edge and the first arc edge are located on the same side of the orthographic projection, and there is a maximum distance D3 between the first side edge and the first arc edge, and the maximum distance D3 is less than the second distance D2.

[0023] Another aspect of the present disclosure provides a method for manufacturing a display substrate, wherein the display substrate has a display area, and the manufacturing method includes:

[0024] providing a substrate;

[0025] forming a plurality of pixel units on one side of the base substrate, the plurality of pixel units being arranged in an array in the display area, each pixel unit including a plurality of sub-pixels, and the sub-pixels including sub-pixel openings defined by a pixel defining layer provided on the base substrate;

[0026] A plurality of sub-pixel lenses are formed on a side of the pixel defining layer away from the base substrate, and the pixel defining layer on a side of the sub-pixel lenses close to the base substrate has corresponding sub-pixel openings;

[0027] Wherein, the multiple sub-pixels included in each pixel unit include at least two sub-pixels of the same color,

[0028] The orthographic projection of the sub-pixel opening on the substrate is a parallelogram, the orthographic projection of the sub-pixel lens on the substrate is a circle, and the orthographic projection of the sub-pixel opening on the substrate is located within the orthographic projection of the corresponding sub-pixel lens on the substrate;

[0029] Adjacent sides of two adjacent sub-pixel openings are arranged in parallel, and adjacent sides of adjacent sub-pixel openings have a first distance D1; the closest points between adjacent sub-pixel lenses have a second distance D2, and the second distance D2 is smaller than the first distance D1.

[0030] Another aspect of the embodiments of the present disclosure provides a display device, which includes the display substrate described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings.

[0032] FIG1 is a schematic plan view of a display substrate according to an exemplary embodiment of the present disclosure;

[0033] FIG2A is a partial enlarged view of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure;

[0034] FIG2B is a schematic diagram of a partial cross-sectional structure of a display substrate along line BB in FIG2 according to an exemplary embodiment of the present disclosure;

[0035] FIG2C is a schematic diagram of a partial cross-sectional structure of a display substrate along line CC in FIG2 according to another exemplary embodiment of the present disclosure;

[0036] FIG3 is a partial enlarged view of one pixel unit of a display substrate according to another exemplary embodiment of the present disclosure;

[0037] FIG4 is a partial enlarged view of a pixel unit of a display substrate according to yet another exemplary embodiment of the present disclosure;

[0038] FIG5 is a schematic diagram showing the size structure of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure;

[0039] FIG6 is a schematic diagram showing the size structure of a pixel unit of a display substrate according to another exemplary embodiment of the present disclosure;

[0040] FIG. 7 is a schematic structural diagram of a display device according to an exemplary embodiment of the present disclosure.

[0041] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of layers, structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] It should be noted that in the drawings, the sizes and relative sizes of elements may be exaggerated for clarity and / or descriptive purposes. Thus, the sizes and relative sizes of the individual elements are not necessarily limited to those shown in the drawings. In the specification and drawings, the same or similar reference numerals indicate the same or similar parts.

[0044] When an element is described as being "on" another element, "connected to" another element, or "bound to" another element, the element may be directly on the other element, directly connected to the other element, or directly bound to the other element, or there may be an intermediate element. However, when an element is described as being "directly on" another element, "directly connected to" another element, or "directly bound to" another element, there is no intermediate element. Other terms and / or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, "between" versus "directly between", "adjacent" versus "directly adjacent", or "on" versus "directly on", etc. In addition, the term "connected" may refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection. In addition, the X-axis, Y-axis, and Z-axis are not limited to the three axes of a rectangular coordinate system, and may be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0045] It should be noted that although the terms "first," "second," etc. may be used herein to describe various parts, components, elements, regions, layers, and / or portions, these parts, components, elements, regions, layers, and / or portions should not be limited by these terms. Rather, these terms are used to distinguish one part, component, element, region, layer, and / or portion from another. Thus, for example, the first part, first member, first element, first region, first layer, and / or first portion discussed below may be referred to as a second part, second member, second element, second region, second layer, and / or second portion without departing from the teachings of the present disclosure.

[0046] For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," etc., may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features.

[0047] It should be noted that, in this article, the term "the same layer" refers to a layer structure formed by using the same film-forming process to form a film layer used to form a specific pattern, and then patterning the film layer using the same mask through a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the resulting layer structure may be continuous or discontinuous. In other words, multiple elements, components, structures, and / or parts located in the "same layer" are composed of the same material and are formed through the same patterning process. Typically, multiple elements, components, structures, and / or parts located in the "same layer" have approximately the same thickness.

[0048] Those skilled in the art should understand that, in this article, unless otherwise specified, the expression "height" or "thickness" refers to the dimension of the surface of each film layer arranged perpendicular to the display substrate, that is, the dimension along the light emitting direction of the display substrate, or the dimension along the normal direction of the display device.

[0049] In this document, the directional expressions "first direction" and "second direction" are used to describe different directions along a pixel region, such as the longitudinal and transverse directions of a pixel region, or the row and column directions of a sub-pixel arrangement. It should be understood that such expressions are merely exemplary descriptions and are not intended to limit the present disclosure.

[0050] Some exemplary embodiments of the present disclosure provide a display substrate, which has a display area, and includes but is not limited to: a base substrate; a plurality of pixel units arranged in an array within the display area, each pixel unit including a plurality of sub-pixels, each sub-pixel including a sub-pixel opening defined by a pixel defining layer arranged on the base substrate; a plurality of sub-pixel lenses arranged in an array on a side of the pixel defining layer away from the base substrate, each sub-pixel lens having a corresponding sub-pixel opening on a side of the pixel defining layer close to the base substrate; wherein the plurality of sub-pixels included in each pixel unit include at least two sub-pixels of the same color, the orthographic projection of the sub-pixel opening on the base substrate is a parallelogram, the orthographic projection of the sub-pixel lens on the base substrate is a circle, and the orthographic projection of each sub-pixel opening on the base substrate is located within the orthographic projection of the corresponding sub-pixel lens on the base substrate; adjacent sides of two adjacent sub-pixel openings are arranged in parallel, and the adjacent sides of the adjacent sub-pixel openings have a first distance D1; the closest points between adjacent sub-pixel lenses have a second distance D2, and the second distance D2 is less than the first distance D1.

[0051] According to the display device of the embodiment of the present disclosure, a plurality of sub-pixel lenses are provided on the side of the pixel defining layer away from the base substrate, thereby improving the light extraction efficiency of the sub-pixels. By providing at least two sub-pixels of the same color in a pixel unit and making the adjacent sides of the two adjacent sub-pixel openings parallel to each other, the maximum aperture ratio in each pixel unit can be achieved under the manufacturing process of the extreme pixel opening. By setting the orthographic projection of the sub-pixel lens on the base substrate to a circle, providing at least two sub-pixels of the same color in the pixel unit, and setting the second distance D2 between the closest points between adjacent sub-pixel lenses to be greater than the first distance D1 between the adjacent sides of the adjacent sub-pixel openings, the maximum aperture ratio in each pixel unit can be guaranteed under the process of the extreme distance of adjacent sub-pixel lenses. On the one hand, the light extraction efficiency of the display substrate can be improved, and at the same time, the demand for high pixel density can be met.

[0052] FIG. 1 is a schematic planar structural diagram of a display substrate according to an exemplary embodiment of the present disclosure.

[0053] As shown in FIG. 1 , the display substrate 100 includes a display area AA and a non-display area NA.

[0054] The display area AA may be an area where pixel cells PX that display an image are located. Each pixel cell PX will be described later. The non-display area NA is an area where pixel cells PX are not located, that is, an area where no image is displayed. The non-display area NA corresponds to the bezel in the final display device, and the width of the bezel is determined based on the width of the non-display area NA.

[0055] The display area AA can have various shapes. For example, the display area AA can be provided in various shapes, such as a closed polygon (e.g., a rectangle) with straight sides, a circle or an ellipse with curved sides, or a semicircle or a semiellipse with both straight and curved sides. In the embodiment of the present disclosure, the display area AA is provided as a quadrilateral with straight sides. It should be understood that this is merely an exemplary embodiment of the present disclosure and is not intended to limit the present disclosure.

[0056] The non-display area NA may be provided on at least one side of the display area AA. In an embodiment of the present disclosure, the non-display area NA may surround the periphery of the display area AA. In an embodiment of the present disclosure, the non-display area NA may include a transverse portion extending in a first direction X and a longitudinal portion extending in a second direction Y.

[0057] The pixel unit PX is arranged in the display area AA. The pixel unit PX is the smallest unit for displaying an image and can be arranged in multiple forms. For example, the pixel unit PX may include a light-emitting device that emits white light and / or colored light. The pixel units PX are arranged in an array in the display area, for example, arranged in sequence in the first direction X and the second direction Y. The pixel units PX can be arranged in multiple forms, arranged in a matrix form along rows extending in the first direction X and columns extending in the first direction Y. However, the embodiments of the present disclosure do not specifically limit the arrangement form of the pixel units PX, and the pixel units PX can be arranged in various forms. For example, the pixel units PX can be arranged so that the direction inclined relative to the first direction X and the first direction Y becomes the column direction, and the direction intersecting the column direction becomes the row direction.

[0058] That is, the plurality of pixel units PX are arranged in an array along the first direction X and the second direction Y to form a plurality of rows of pixel units and a plurality of columns of pixel units.

[0059] A pixel unit PX may include multiple sub-pixels. For example, a pixel unit PX may include four sub-pixels, namely a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4. For example, the sub-pixels may be arranged in different colors or the same color. For example, the first sub-pixel SP1 and the second sub-pixel SP2 may be sub-pixels of the same color, such as a blue sub-pixel, the third sub-pixel SP3 may be a red sub-pixel, and the fourth sub-pixel SP4 may be a green sub-pixel. In some embodiments of the present disclosure, the four sub-pixels may be arranged in a first direction X and a second direction Y, respectively, so that the multiple sub-pixels within a pixel unit PX are arranged in an array.

[0060] It should be noted that in the embodiments of the present disclosure, the number of sub-pixels included in a pixel unit is not particularly limited and is not limited to the four described above. For example, the number may be greater than four. In this embodiment, the pixel unit in FIG1 is merely exemplary. The sizes of the pixel units and sub-pixels in the drawings used to describe the embodiments of the present disclosure may be exaggerated or reduced, that is, these drawings are not drawn to scale.

[0061] Figure 2A is a partially enlarged view of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure. Figure 2B is a schematic diagram of a partial cross-sectional structure of a display substrate along line BB in Figure 2 according to an exemplary embodiment of the present disclosure. Figure 2C is a schematic diagram of a partial cross-sectional structure of a display substrate along line CC in Figure 2 according to another exemplary embodiment of the present disclosure.

[0062] As shown in Figures 1, 2A and 2B, the display substrate 100 includes a base substrate 10, and multiple film layers are arranged on one side of the base substrate 10, such as a buffer layer, a semiconductor layer, a gate layer, a source and drain layer, multiple insulating layers, a passivation layer, etc.

[0063] For example, as shown in FIG2B , a buffer layer 11 is provided on one side of a base substrate 10, a semiconductor layer 12 is provided on the side of the buffer layer 11 away from the base substrate, and an interlayer dielectric layer 13, a gate insulating layer 14, and a gate layer 15 are provided on the side of the semiconductor layer 12 away from the base substrate. For example, the interlayer dielectric layer 13 is provided on the side of the semiconductor layer 12, the gate insulating layer 14, and the gate layer 15 away from the base substrate 10. A source-drain electrode layer 16 is provided on the side of the interlayer dielectric layer 13 away from the base substrate 10. The source-drain electrode layer 16 is electrically connected to the semiconductor layer 12 through a via. A passivation layer 17 is provided on the side of the source-drain electrode layer 16 away from the base substrate 10. A second semiconductor layer 12 is disposed on the side of the passivation layer 17 away from the base substrate 10. An interlayer dielectric layer 13, a second gate insulating layer 14, and a second gate layer 15 are also disposed on the side of the second semiconductor layer 12 away from the base substrate 10. For example, the second interlayer dielectric layer 13 is disposed on the side of the second semiconductor layer 12, the second gate insulating layer 14, and the second gate layer 15 away from the base substrate 10. A second source-drain electrode layer 16 is disposed on the side of the second interlayer dielectric layer 13 away from the base substrate 10. The second source-drain electrode layer 16 is electrically connected to the second semiconductor layer 12 through vias. A second passivation layer 17 is disposed on the side of the second source-drain electrode layer 16 away from the base substrate 10.

[0064] As shown in FIG1 , a display substrate 100 of an embodiment of the present disclosure includes a plurality of pixel units PX arranged in an array within a display area AA. Each pixel unit PX includes a plurality of sub-pixels, and the plurality of sub-pixels within each pixel unit PX include at least two sub-pixels of the same color. For example, each pixel unit includes four sub-pixels, and the four sub-pixels include sub-pixels of three colors, meaning that two of the four pixels have the same color.

[0065] In some optional embodiments, each pixel unit of the display substrate includes two or more sub-pixels of the same color, for example, four or more. In other optional embodiments, each pixel unit of the display substrate includes sub-pixels of multiple colors, and each color may have plural sub-pixels.

[0066] 2A and 2B , each sub-pixel includes a sub-pixel opening 201 defined by a pixel defining layer 20 disposed on the base substrate. For example, the pixel defining layer 20 is disposed on a side of the passivation layer 17 away from the base substrate 10 .

[0067] A plurality of sub-pixel lenses 30 are arranged in an array on the side of the pixel defining layer 20 away from the base substrate 10. Each sub-pixel lens 30 has a corresponding sub-pixel opening 201 on the side close to the base substrate 10. The sub-pixel opening 201 is provided with luminescent materials of different colors so that different sub-pixels produce light of different colors. The sub-pixel lens 30 is arranged on the side of the pixel defining layer 20 away from the base substrate 10, and the sub-pixel lens 30 covers the side of the sub-pixel opening 201 away from the base substrate 10, thereby focusing the light generated by the luminescent material in the sub-pixel opening, improving the light extraction efficiency of each sub-pixel, and improving the light extraction efficiency and display effect of the entire display substrate as a whole.

[0068] The orthographic projection of the sub-pixel opening 201 on the substrate is a parallelogram. For example, the orthographic projection of the sub-pixel opening 201 on the substrate 10 is a square and / or a rectangle. That is, the orthographic projection of the sub-pixel opening in each pixel unit on the substrate can be a square or a rectangle. The sub-pixel openings included in each pixel unit can include both square and rectangular shapes. For example, the sub-pixel openings are all arranged in a square shape, or are all arranged in a rectangular shape, or the sub-pixel openings are arranged in a mixed pattern of square and rectangular shapes.

[0069] As shown in FIG2B , the side of the sub-pixel lens 30's cross-section away from the substrate has an arcuate surface, which can focus the light emitted by the luminescent material, thereby increasing the brightness of the sub-pixel and improving the brightness of the display substrate. The orthographic projection of the sub-pixel lens 30 on the substrate 10 is circular. As shown in FIG2A , when viewed perpendicular to the surface of the display substrate, the sub-pixel lens 30 is circular. The orthographic projection of each sub-pixel opening 201 on the substrate 10 is located within the orthographic projection of the corresponding sub-pixel lens 30 on the substrate.

[0070] By setting the orthographic projection of the sub-pixel opening on the base substrate to be located within the orthographic projection of the sub-pixel lens on the base substrate, it is ensured that each sub-pixel lens can have a good focusing effect on the light emitted by the luminescent material in the sub-pixel opening, thereby improving the light output rate and light output brightness.

[0071] In some embodiments of the present disclosure, a plurality of pixel units are arranged in an array in a first direction X and a second direction Y, respectively. Sub-pixels within each pixel unit are also arranged in an array in the first direction X and the second direction Y, and adjacent sides of adjacent sub-pixel openings are arranged in parallel.

[0072] In some embodiments of the present disclosure, a pixel unit PX includes three color sub-pixels, i.e., each pixel unit includes three colors. For example, a first color sub-pixel is a blue sub-pixel, which may include two or more first color sub-pixels, a second color sub-pixel is a red sub-pixel, and a third color sub-pixel is a green sub-pixel. In other embodiments, a pixel unit may include more color sub-pixels.

[0073] FIG2A schematically illustrates a planar structure of a pixel unit. The three color sub-pixels within the pixel unit include four sub-pixels: a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4. The first sub-pixel SP1 includes a first sub-pixel opening 2011 and a first sub-pixel lens 301. The second sub-pixel SP2 includes a second sub-pixel opening 2012 and a second sub-pixel lens 302. The third sub-pixel SP3 includes a third sub-pixel opening 2013 and a third sub-pixel lens 303. The fourth sub-pixel SP4 includes a fourth sub-pixel opening 2014 and a fourth sub-pixel lens 304. The first sub-pixel SP1 and the second sub-pixel SP2 are configured to display the same color. That is, the first sub-pixel opening 2011 and the second sub-pixel opening 2012 are filled with the same luminescent material. For example, the first sub-pixel SP1 and the second sub-pixel SP2 are both configured to emit blue light, i.e., both the first sub-pixel SP1 and the second sub-pixel SP2 are blue sub-pixels. The third sub-pixel SP3 can, for example, emit red light, i.e., it is a red sub-pixel. The fourth sub-pixel SP4 may be configured to emit green light, for example. That is, the fourth sub-pixel SP4 is a green sub-pixel.

[0074] When manufacturing an OLED display substrate, the minimum spacing between adjacent sub-pixel openings (i.e., the width of the pixel defining layer between adjacent sub-pixel openings) is related to the manufacturing process. When the limit size of the manufacturing process is reached, the minimum spacing between adjacent sub-pixel openings is the limit size of the manufacturing process. With the demand for high pixel density, the number of pixel units per unit area increases, and at the same time, the number of sub-pixel openings per unit area also increases, which inevitably leads to a gradual decrease in the pixel aperture ratio. In order to have the maximum aperture ratio at the limit size of the manufacturing process, the adjacent sides of adjacent sub-pixel openings are arranged in parallel, that is, the size of the pixel defining layer between adjacent sub-pixel openings is the same as the limit size of the manufacturing process, thereby achieving the maximum aperture ratio at the limit size of the manufacturing process.

[0075] As shown in FIG2A , adjacent sides of two adjacent sub-pixel openings 201 are arranged in parallel. For example, in the first direction X, the first sub-pixel SP1 and the fourth sub-pixel SP4 are adjacent. The first sub-pixel opening 2011 of the first sub-pixel SP1 has a side close to the fourth sub-pixel, and the fourth sub-pixel opening 2014 of the fourth sub-pixel SP4 has a side close to the first sub-pixel. The adjacent two sides have a first distance D1.

[0076] For another example, in the second direction Y, the first sub-pixel SP1 and the second sub-pixel SP2 are adjacent, the first sub-pixel opening 2011 of the first sub-pixel SP1 has a side close to the second sub-pixel SP2, the second sub-pixel opening 2012 of the second sub-pixel SP2 has a side close to the first sub-pixel, and the adjacent two sides have a first distance D1.

[0077] In some embodiments of the present disclosure, the orthographic projections of the plurality of sub-pixel lenses on the substrate 10 have the same diameter. That is, the plurality of sub-pixel lenses 30 are configured to be the same size, and a second distance D2 is provided between adjacent sub-pixel lenses 30. Since the second distance D2 is the minimum spacing for forming the sub-pixel lenses 30, the maximum number of sub-pixel lenses can be formed within a unit area, thereby improving the sub-pixel light focusing effect.

[0078] In the embodiment of the present disclosure, the second distance D2 is smaller than the first distance D1. That is, the sub-pixel opening does not completely overlap with the sub-pixel lens. In the related art, the sub-pixel opening is completely overlapped with the sub-pixel lens to improve the light extraction efficiency of the sub-pixel. However, when the sub-pixel opening completely overlaps with the sub-pixel lens, the sub-pixel opening is circular, and the intervals between the circles are smaller than the parallel sides. The pixel aperture ratio is low and cannot meet the design requirements of high-density pixel arrangement. By setting the second distance D2 to be smaller than the first distance D1, the pixel aperture ratio is improved, meeting the requirements of high-density pixel arrangement design.

[0079] In some embodiments of the present disclosure, the center of each sub-pixel lens coincides with the orthographic projection of the center of the corresponding sub-pixel opening on the substrate. As shown in FIG2A , the center of the first sub-pixel lens 301 coincides with the orthographic projection of the center of the first sub-pixel opening 2011 on the substrate 10, which is point O1. The center of the second sub-pixel lens 302 coincides with the orthographic projection of the center of the second sub-pixel opening 2012 on the substrate 10, which is point O2. The center of the third sub-pixel lens 303 coincides with the orthographic projection of the center of the third sub-pixel opening 2013 on the substrate 10, which is point O3. The center of the fourth sub-pixel lens 304 coincides with the orthographic projection of the center of the fourth sub-pixel opening 2014 on the substrate 10, which is point O4.

[0080] According to an embodiment of the present disclosure, by setting the center of each sub-pixel lens to coincide with the orthographic projection of the center of the corresponding sub-pixel opening on the substrate, the sub-pixel lens can have a better converging effect on the light emitted by the luminescent material filled in the sub-pixel opening, thereby improving the light output intensity of each sub-pixel.

[0081] In some embodiments of the present disclosure, by locating the orthographic projection of each sub-pixel opening on the substrate within the orthographic projection of the corresponding sub-pixel lens on the substrate, and at the same time having the same diameter as the orthographic projections of multiple sub-pixel lenses on the substrate, the display substrate can have a maximum pixel aperture ratio while improving the overall light output efficiency and light output intensity of the display substrate.

[0082] In the embodiment shown in Figure 2A, each pixel unit PX includes a first sub-pixel SP1 and a second sub-pixel SP2 having the same color, a third sub-pixel SP3 having a different color from the first sub-pixel SP1 and the second sub-pixel SP2, and a fourth sub-pixel SP4 having a color different from the first sub-pixel and the third sub-pixel.

[0083] In the process of manufacturing sub-pixel lenses, the second distance D2 between adjacent sub-pixel lenses needs to be greater than or equal to the limit size of the manufacturing process for manufacturing sub-pixel lenses. If the second distance D2 between adjacent sub-pixel lenses is less than the limit size of the manufacturing process for manufacturing sub-pixel lenses, the prepared sub-pixel lenses will not be able to achieve the focusing effect, or even produce defects, thereby reducing the display effect of the display substrate and even causing product defects. In order to avoid the occurrence of the above problems, in some embodiments of the present disclosure, each sub-pixel lens has a center, and the centers of the sub-pixel lenses corresponding to the above four sub-pixels are connected in sequence to form a square, for example, point O1, point O2, point O3 and point O4 are connected in sequence to form a square O1O2O3O4, and the distance between O1O2, the distance between O2O3, the distance between O3O4 and the distance between O4O1 are the limit size of the sub-pixel lens manufacturing process, so that the sub-pixel lenses within a unit area can cover the sub-pixel opening to the greatest extent without producing defects or reducing the focusing effect, thereby improving the focusing effect of the light generated by the luminescent material in the sub-pixel opening. At the same time, in order to maximize the pixel aperture ratio on the display substrate, each sub-pixel opening is set to a rectangle or square, which significantly improves the pixel aperture ratio per unit area and meets the design of a high-resolution display substrate.

[0084] As shown in FIG2A , the sub-pixels include sub-pixels arranged at intervals along a first direction X and sub-pixels arranged at intervals along a second direction Y. The first distance D1 between adjacent sides of adjacent sub-pixel openings includes: a first direction distance D11 between adjacent sides of adjacent sub-pixels in the first direction X, and a second direction distance D12 between adjacent sides of adjacent sub-pixels in the second direction Y.

[0085] For example, the first subpixel opening 2011 of the first subpixel SP1 includes four side edges, namely, side edge 2011A, side edge 2011B, side edge 2011C, and side edge 2011D. The first subpixel SP1 is adjacent to the fourth subpixel SP4 in the first direction X. The fourth subpixel opening 2014 of the fourth subpixel SP4 includes four side edges, namely, side edge 2014A, side edge 2014B, side edge 2014C, and side edge 2014D. The side edge 2011A of the first subpixel opening 2011 is adjacent to the side edge 2014C of the fourth subpixel opening 2014, and the distance between the side edge 2011A and the side edge 2014C is the first direction distance D11.

[0086] For another example, the first subpixel SP1 is adjacent to the second subpixel SP2 in the second direction Y. The second subpixel opening 2012 of the second subpixel SP2 includes four side edges, namely, side edge 2012A, side edge 2012B, side edge 2012C, and side edge 2012D. The side edge 2011D of the first subpixel opening 2011 is adjacent to the side edge 2012B of the second subpixel opening 2012, and the distance between the side edge 2011D and the side edge 2012B is the second direction distance D12.

[0087] In the embodiment shown in Figure 2A, the first direction distance D11 is equal to the second direction distance D12. By setting the first direction distance D11 equal to the second direction distance D12, each pixel unit in the display substrate can have the maximum aperture efficiency, meeting the high resolution requirement.

[0088] As shown in FIG2A , the orthographic projection of each sub-pixel opening on the substrate has a first side edge proximate to an adjacent sub-pixel opening. The orthographic projection of the sub-pixel lens corresponding to the sub-pixel opening on the substrate has a first arc edge proximate to the adjacent sub-pixel lens, and the first side edge and the first arc edge are located on the same side of the orthographic projection. For example, the first sub-pixel opening 2011 has a first side edge 2011A proximate to the fourth sub-pixel opening 2014. The orthographic projection of the sub-pixel lens 301 corresponding to the first sub-pixel opening 2011 on the substrate has a first arc edge 301A proximate to the adjacent sub-pixel lens 304, and a maximum distance D3 is defined between the first side edge 2011A and the first arc edge 301A. By setting the maximum distance D3 to be less than the second distance D2, the area uncovered by each sub-pixel lens is minimized, thereby maximizing the pixel density of the display substrate while ensuring improved brightness and maximizing the pixel aperture ratio, thereby meeting the design requirements of a high-resolution display substrate.

[0089] As shown in FIG2A , the area of ​​the first sub-pixel opening 2011 is S11, the area of ​​the second sub-pixel opening 2012 is S12, the area of ​​the third sub-pixel opening 2013 is S13, and the area of ​​the fourth sub-pixel opening 2014 is S14. S11 = S12 = S13 = S14, that is, the areas of all sub-pixel openings within a pixel unit are the same.

[0090] The first and second sub-pixels are blue sub-pixels of the same color, the third sub-pixel is a red sub-pixel, and the fourth sub-pixel is a green sub-pixel. The orthographic projection of the first sub-pixel opening on the substrate is inscribed in the orthographic projection of the first sub-pixel lens on the substrate, the orthographic projection of the second sub-pixel opening on the substrate is inscribed in the orthographic projection of the second sub-pixel lens on the substrate. Furthermore, the orthographic projection of the third sub-pixel opening on the substrate is inscribed in the orthographic projection of the third sub-pixel lens on the substrate. The orthographic projection of the fourth sub-pixel opening on the substrate is inscribed in the orthographic projection of the fourth sub-pixel lens on the substrate.

[0091] According to an embodiment of the present disclosure, by setting the orthographic projection of the sub-pixel opening in a pixel unit on the substrate to be inscribed in the orthographic projection of the corresponding sub-pixel lens on the substrate, the non-overlapping area between the sub-pixel lens and the sub-pixel opening is reduced, thereby improving the pixel aperture ratio in the pixel unit.

[0092] FIG. 3 is a partially enlarged view of one pixel unit of a display substrate according to another exemplary embodiment of the present disclosure.

[0093] In another embodiment of the present disclosure, as shown in FIG3 , the first sub-pixel SP1 and the second sub-pixel SP2 are blue sub-pixels of the same color, the third sub-pixel SP3 is a red sub-pixel, and the fourth sub-pixel SP4 is a green sub-pixel.

[0094] The orthographic projection of the first sub-pixel opening 2011 on the substrate is inscribed in the orthographic projection of the first sub-pixel lens 301 on the substrate. The orthographic projection of the second sub-pixel opening 2012 on the substrate is inscribed in the orthographic projection of the second sub-pixel lens 302 on the substrate. Simultaneously, the orthographic projection of the third sub-pixel opening 2013 on the substrate is located within the orthographic projection of the third sub-pixel lens 303 on the substrate, and the orthographic projection of the third sub-pixel opening 2013 on the substrate is not inscribed in the orthographic projection of the third sub-pixel lens 303 on the substrate. The orthographic projection of the fourth sub-pixel opening 2014 on the substrate is located within the orthographic projection of the fourth sub-pixel lens 304 on the substrate, and the orthographic projection of the fourth sub-pixel opening 2014 on the substrate is not inscribed in the orthographic projection of the fourth sub-pixel lens 304 on the substrate. That is, in this embodiment, the area of ​​the first sub-pixel opening 2011 is S11, which is equal to the area of ​​the second sub-pixel opening 2012 is S12, and S11 and S12 are greater than the area of ​​the third sub-pixel opening 2013 is S13, and S13 is greater than the area of ​​the fourth sub-pixel opening 2014 is S14, S11=S12>S13>S14, that is, the area of ​​the blue sub-pixel within a pixel unit is the largest, the area of ​​the red sub-pixel is smaller than the area of ​​the blue sub-pixel, and the area of ​​the green sub-pixel is smaller than the area of ​​the red sub-pixel.

[0095] In some optional embodiments, the area of ​​the blue sub-pixel in a pixel unit is the largest, the area of ​​the red sub-pixel is smaller than the area of ​​the blue sub-pixel, and the area of ​​the green sub-pixel is equal to the area of ​​the red sub-pixel.

[0096] In other embodiments, in order to meet the white balance setting of the display substrate, the size of the sub-pixel opening in each pixel unit is appropriately adjusted while keeping the second spacing D2 of the sub-pixel lenses unchanged. For example, the area of ​​the sub-pixel opening of the blue sub-pixel is kept unchanged, while the area of ​​the sub-pixel opening of the red sub-pixel is reduced, and the area of ​​the sub-pixel opening of the green sub-pixel is reduced.

[0097] Exemplarily, the area S11 of the first sub-pixel opening is equal to the area S12 of the second sub-pixel opening. The area S13 of the third sub-pixel opening and the area S14 of the fourth sub-pixel opening are smaller than the areas S11 and S12, and the ratio of the area S13 to the area S14 is within a range of 1 to 2.5, thereby achieving a better white balance effect on the display substrate.

[0098] FIG. 4 is a partially enlarged view of one pixel unit of a display substrate according to yet another exemplary embodiment of the present disclosure.

[0099] In other embodiments of the present disclosure, as shown in FIG4 , the orthographic projections of the four sub-pixel openings within the pixel unit on the substrate are rectangles. In this embodiment, the first sub-pixel SP1′ and the second sub-pixel SP2′ are blue sub-pixels of the same color, the third sub-pixel SP3′ is a red sub-pixel, and the fourth sub-pixel SP4′ is a green sub-pixel, wherein the four sub-pixels within one pixel unit have the same area.

[0100] The sub-pixels include sub-pixels arranged at intervals along a first direction X and sub-pixels arranged at intervals along a second direction Y. The first distance D1 between adjacent sides of adjacent sub-pixel openings includes: a first direction distance D11 between adjacent sides of sub-pixels adjacent in the first direction X, and a second direction distance D12 between adjacent sides of sub-pixels adjacent in the second direction Y.

[0101] As shown in the figure, the first subpixel opening 2011' of the first subpixel SP1' includes four side edges, namely, side edge 2011A', side edge 2011B', side edge 2011C', and side edge 2011D'. The first subpixel SP1' is adjacent to the fourth subpixel SP4' in the first direction X. The fourth subpixel opening 2014' of the fourth subpixel SP4' includes four side edges, namely, side edge 2014A', side edge 2014B', side edge 2014C', and side edge 2014D'. The side edge 2011A' of the first subpixel opening 2011' is adjacent to the side edge 2014C' of the fourth subpixel opening 2014', and the distance between the side edges 2011A' and 2014C' is the first direction distance D11'. The first subpixel SP1' is adjacent to the second subpixel SP2' in the second direction Y. The second subpixel opening 2012' of the second subpixel SP2' includes four side edges: side edge 2012A', side edge 2012B', side edge 2012C', and side edge 2012D'. Side edge 2011D' of the first subpixel opening 2011' is adjacent to side edge 2012B' of the second subpixel opening 2012'. The distance between side edge 2011D' and side edge 2012B' is a second-direction distance D12'. The second-direction distance D12' is greater than the first-direction distance D11'.

[0102] According to the embodiments of the present disclosure, by arranging the sub-pixel openings within a pixel unit into a rectangular structure, designs of different display effects can be met without significantly reducing the aperture ratio of the pixel unit of the display substrate.

[0103] In some embodiments of the present disclosure, as shown in Figure 2B, the display substrate 100 also includes an anode layer 40, which is arranged between the pixel defining layer 20 and the base substrate 10. Specifically, the anode layer 40 is arranged between the pixel defining layer 20 and the passivation layer 17, and the orthographic projection of the sub-pixel opening on the base substrate is located within the orthographic projection of the anode layer 40 on the base substrate.

[0104] The anode layer 40 includes an anode corresponding to each color sub-pixel. For example, a first anode corresponds to a first color sub-pixel, a second anode corresponds to a second color sub-pixel, and a third anode corresponds to a third color sub-pixel. The orthographic projections of the first, second, and third anodes on the substrate do not overlap. That is, within each pixel unit, each color sub-pixel has an anode electrode corresponding to each color sub-pixel, respectively, for providing electrical signals to the different color sub-pixels.

[0105] In some exemplary embodiments of the present disclosure, the orthographic projections of the first subpixel openings of the same-colored first-color subpixels within each pixel unit on the substrate are located within the orthographic projections of the same first anode on the substrate. As shown in FIG2C , the first-color subpixels include a first subpixel SP1 and a second subpixel SP2, which can be configured as blue subpixels. The orthographic projections of the first subpixel opening of the first subpixel SP1 and the second subpixel opening of the second subpixel SP2 on the substrate are located within the orthographic projections of the same first anode on the substrate, meaning that the first subpixel SP1 and the second subpixel SP2 share the same anode.

[0106] In some other exemplary embodiments of the present disclosure, as shown in Figure 2B, the first anode includes a first sub-anode 401 corresponding to one of the first sub-color pixels, and a second sub-anode 402 corresponding to another first-color sub-pixel; the orthographic projections of the first sub-anode 401 and the second sub-anode 402 on the substrate do not overlap.

[0107] As shown in FIG2B , the first subpixel SP1 and the second subpixel SP2 are both blue subpixels. The first sub-anode corresponding to the first subpixel SP1 and the second sub-anode corresponding to the second subpixel SP2 are different sub-anodes. The first subpixel SP1 and the second subpixel SP2 receive electrical signals via different sub-anodes, facilitating separate control of the first and second subpixels of the same color within the same pixel unit. Specifically, the first subpixel SP1 receives an electrical signal via the first sub-anode 401, while the second subpixel SP2 receives an electrical signal via the second sub-anode 402.

[0108] As shown in FIG2B , the display substrate 100 further includes a control circuit 50. The control circuit 50 is disposed between the anode layer 40 and the base substrate 10. For example, the control circuit 50 is formed by designing multiple film layers, such as the semiconductor layer 12, the interlayer dielectric layer 13, the gate insulating layer 14, the gate layer 15, the source and drain electrode layer 16, and the passivation layer 17. By inputting different electrical signals into the control circuit 50, the conduction state of the anode of the sub-pixel is controlled.

[0109] As shown in FIG2B , the control circuit 50 includes a first control sub-circuit 51 for controlling the conductive state of the first sub-anode 401, and a second control sub-circuit 52 for controlling the conductive state of the second sub-anode 402. When the first sub-anode 401 is conductive, the luminescent material filled in the first pixel opening emits light, and when the second sub-anode 402 is conductive, the luminescent material filled in the second pixel opening emits light. The luminous intensity is controlled by controlling the current flowing through the first sub-anode 401 and / or the second sub-anode 402 in the control circuit.

[0110] During the light-emitting process of the sub-pixels of the display substrate, especially when the pixel openings are filled with organic light-emitting materials, prolonged light emission will reduce the lifespan of the light-emitting materials. At the same time, higher brightness will also reduce the lifespan of the light-emitting materials, thereby shortening the service life of the display substrate. To avoid the above-mentioned problems, in some embodiments of the present disclosure, the control circuit is configured to: control the first sub-anode to be conductive via a first control sub-circuit, and when the current flowing through the first sub-anode is greater than or equal to half of the maximum current, control the second sub-anode to be conductive via a second control sub-circuit.

[0111] Illustratively, different sub-pixels of the same color within the same pixel unit are controlled separately by the first control sub-circuit 51 and the second control sub-circuit 52. For example, when the current flowing through the first sub-anode 401 is greater than or equal to half of the maximum current, it indicates that the luminous brightness corresponding to the first sub-pixel SP1 increases. The second sub-anode 402 can be controlled to be turned on by the second control sub-circuit 52, so that the second sub-pixel SP2 compensates for the luminous brightness of the first sub-pixel SP1. At the same time, when the luminous brightness within the pixel unit is low, one of the two sub-pixels of the same color can be turned off, thereby increasing the service life of the sub-pixel.

[0112] In other embodiments of the present disclosure, the control circuit 50 is configured to: in a first time period, control the first sub-anode 401 to be conductive through the first control sub-circuit 51, and control the second sub-anode 402 to be non-conductive through the second control sub-circuit 52; and in a second time period, control the first sub-anode 401 to be non-conductive through the first control sub-circuit 51, and control the second sub-anode 402 to be conductive through the second control sub-circuit 52.

[0113] That is, different sub-pixels of the same color within the same pixel unit are controlled to light up in turn during different time periods. For example, when sub-pixels of the same color are all in low-brightness mode, during the first time period, one sub-pixel is controlled to light up while the other is turned off. During the second time period, the other sub-pixel is controlled to light up while one sub-pixel is turned off. This allows sub-pixels of the same color to light up in turn, thereby increasing the pixel's service life.

[0114] FIG. 5 is a schematic diagram showing the size structure of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure.

[0115] As shown in Figure 5, the size structure of a pixel unit is shown. In this embodiment, the pixel unit is a square with a side length of 104.4um. Each pixel unit includes four sub-pixels, including two blue sub-pixels, one red sub-pixel and one green sub-pixel. The sub-pixel openings of each sub-pixel are set to be square and the same size, that is, the orthographic projection of the sub-pixel opening on the substrate is a square, and the sub-pixel opening is a square with a side length of 30.2um. The first distance D1 between adjacent sides of adjacent sub-pixel openings is 22um. Each sub-pixel opening has a corresponding sub-pixel lens, and the diameter of the sub-pixel lens is 42.71um. The second distance D2 between the nearest points between adjacent sub-pixel lenses is 9.49um. According to this pixel opening design, the maximum pixel aperture ratio can be achieved.

[0116] The pixel aperture ratio is the ratio of the aperture area of ​​each pixel unit to the total area of ​​each pixel unit. For example, in this embodiment, the aperture area of ​​each pixel unit is 30.2×30.2×4=3648.16um. 2 The total area of ​​each pixel unit is 104.4×104.4=10899.36um 2 Therefore, the pixel aperture ratio is 33.5%.

[0117] FIG. 6 is a schematic diagram showing the size structure of a pixel unit of a display substrate according to another exemplary embodiment of the present disclosure.

[0118] Figure 6 illustrates the dimensions of another pixel unit. In this embodiment, the pixel unit is a square with a side length of 123 μm. Each pixel unit contains four sub-pixels: two blue sub-pixels, one red sub-pixel, and one green sub-pixel. The sub-pixel openings of each sub-pixel are rectangular and of equal size. The orthographic projection of the sub-pixel openings on the substrate is a rectangle with sides of 40 μm and 30 μm, respectively. The first-direction distance D11 between adjacent sides of adjacent sub-pixel openings in the first direction X is 21.5 μm. The second-direction distance D12 between adjacent sides of adjacent sub-pixel openings in the second direction Y is 31.5 μm, meaning that the second-direction distance D12 is greater than the first-direction distance D11. Each sub-pixel opening has a corresponding sub-pixel lens with a diameter of 50 μm. The second distance D2 between the closest points of adjacent sub-pixel lenses is 11.5 μm. This pixel opening design achieves a pixel aperture ratio of 31.7%, which is a high aperture ratio while ensuring good white balance.

[0119] An embodiment of the present disclosure further provides a method for manufacturing a display substrate, where the display substrate has a display area. The manufacturing method includes operations S101 to S103.

[0120] In operation S101 , a base substrate is provided.

[0121] In operation S102, a plurality of pixel units are formed on one side of the base substrate, the plurality of pixel units are arranged in an array in the display area, each pixel unit includes a plurality of sub-pixels, and each sub-pixel includes a sub-pixel opening defined by a pixel defining layer provided on the base substrate.

[0122] In operation S103, a plurality of sub-pixel lenses are formed on a side of the pixel defining layer away from the base substrate, the pixel defining layer on a side of each sub-pixel lens close to the base substrate has a corresponding sub-pixel opening, the plurality of sub-pixels included in each pixel unit include at least two sub-pixels of the same color, the orthographic projection of the sub-pixel opening on the base substrate is a parallelogram, the orthographic projection of the sub-pixel lens on the base substrate is a circle, the orthographic projection of each sub-pixel opening on the base substrate is located within the orthographic projection of the corresponding sub-pixel lens on the base substrate; adjacent sides of two adjacent sub-pixel openings are arranged in parallel, and adjacent sides of adjacent sub-pixel openings have a first distance D1; the nearest points between adjacent sub-pixel lenses have a second distance D2, and the second distance D2 is smaller than the first distance D1.

[0123] According to an embodiment of the present disclosure, by setting a plurality of sub-pixel lenses on the side of the pixel defining layer away from the base substrate, the light extraction efficiency of the sub-pixels is improved. By setting at least two sub-pixels of the same color in a pixel unit and making the adjacent sides of the two adjacent sub-pixel openings parallel to each other, the maximum aperture ratio in each pixel unit can be achieved under the manufacturing process of the extreme pixel opening. By setting the orthographic projection of the sub-pixel lens on the base substrate to a circle, setting at least two sub-pixels of the same color in the pixel unit, and setting the second distance D2 between the closest points between adjacent sub-pixel lenses to be greater than the first distance D1 between the adjacent sides of the adjacent sub-pixel openings, the maximum aperture ratio in each pixel unit is guaranteed under the process of the extreme distance of adjacent sub-pixel lenses. On the one hand, the light extraction efficiency of the display substrate can be improved, and at the same time, the demand for high pixel density can be met.

[0124] FIG. 7 is a schematic structural diagram of a display device according to an exemplary embodiment of the present disclosure.

[0125] In some embodiments of the present disclosure, as shown in FIG. 7 , an embodiment of the present disclosure further provides a display device 200 , which may include the display substrate 100 described above.

[0126] The beneficial effects that can be achieved by the display device in the above-mentioned embodiment of the present disclosure are the same as the beneficial effects that can be achieved by the above-mentioned display substrate, and will not be described in detail here.

[0127] The display device can be any device that displays an image, whether in motion (e.g., video) or stationary (e.g., still image), and whether textual or graphic. More specifically, it is contemplated that the embodiments may be implemented in or associated with a variety of electronic devices, such as, but not limited to, mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., speedometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), and the like.

[0128] As used herein, the terms "substantially," "about," "approximately," "roughly," and other similar terms are used as terms of approximation rather than as terms of degree, and are intended to account for the inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. To account for factors such as process fluctuations, 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 are inclusive of the stated value and mean within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0129] Although some embodiments of the overall technical concept of the present 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 overall technical concept, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A display substrate, the display substrate having a display area, wherein: The display substrate comprises: substrate substrate; A plurality of pixel units are arranged in an array in the display area, each pixel unit includes a plurality of sub-pixels, and the sub-pixels include sub-pixel openings defined by a pixel defining layer arranged on the substrate; A plurality of sub-pixel lenses are arranged in an array on a side of the pixel defining layer away from the base substrate, and the pixel defining layer on a side of the sub-pixel lenses close to the base substrate has corresponding sub-pixel openings; Wherein, the multiple sub-pixels included in each pixel unit include at least two sub-pixels of the same color, The orthographic projection of the sub-pixel opening on the base substrate is a parallelogram, the orthographic projection of the sub-pixel lens on the base substrate is a circle, and the orthographic projection of the sub-pixel opening on the base substrate is located within the orthographic projection of the corresponding sub-pixel lens on the base substrate; Adjacent sides of two adjacent sub-pixel openings are arranged in parallel, and adjacent sides of adjacent sub-pixel openings have a first distance D1; There is a second distance D2 between the closest points of adjacent sub-pixel lenses, and the second distance D2 is smaller than the first distance D1.

2. The display substrate according to claim 1, wherein: The orthographic projections of the plurality of sub-pixel lenses on the base substrate have the same diameter.

3. The display substrate according to claim 1, wherein: The center of the sub-pixel lens coincides with the orthographic projection of the center of the corresponding sub-pixel opening on the base substrate.

4. The display substrate according to any one of claims 1 to 3, wherein: Each pixel unit includes two first color sub-pixels having the same color, a second color sub-pixel having a color different from the first color sub-pixel, and a third color sub-pixel having a color different from the first color sub-pixel and the second color sub-pixel; The first sub-pixel lens corresponding to the first color sub-pixel has a first center, The second sub-pixel lens corresponding to the second color sub-pixel has a second center, The third sub-pixel lens corresponding to the third color sub-pixel has a third center, The first center, the second center and the third center are sequentially connected to form a square.

5. The display substrate according to claim 4, wherein: The sub-pixels included in the plurality of pixel units are arranged alternately in a first direction and a second direction, wherein the first direction and intersects the second direction, The first distance D1 includes: A first direction distance D11 between adjacent sides of adjacent sub-pixels in the first direction; A second direction distance D12 from adjacent sides of adjacent sub-pixels in the second direction; The second direction distance D12 is greater than or equal to the first direction distance D11.

6. The display substrate according to claim 4, wherein: The first color sub-pixel includes a first sub-pixel opening, the second color sub-pixel includes a second sub-pixel opening, and the third color sub-pixel includes a third sub-pixel opening; The area S1 of the first sub-pixel opening, the area S2 of the second sub-pixel opening, and the area S3 of the third sub-pixel opening satisfy the following relationship: S1≥S2≥S3.

7. The display substrate according to claim 6, wherein: The orthographic projection of the first sub-pixel opening on the base substrate is inscribed in the orthographic projection of the first sub-pixel lens on the base substrate.

8. The display substrate according to claim 7, wherein: The orthographic projection of the second sub-pixel opening on the base substrate is inscribed in the orthographic projection of the second sub-pixel lens on the base substrate.

9. The display substrate according to claim 8, wherein: The orthographic projection of the third sub-pixel opening on the base substrate is inscribed in the orthographic projection of the third sub-pixel lens on the base substrate.

10. The display substrate according to claim 4, wherein: The display substrate also includes: an anode layer, disposed between the pixel defining layer and the base substrate, The orthographic projection of the sub-pixel opening on the base substrate is located within the orthographic projection of the anode layer on the base substrate. The anode layer comprises: a first anode corresponding to the first color sub-pixel; a second anode corresponding to the second color sub-pixel; a third anode corresponding to the third color sub-pixel; The orthographic projections of the first anode, the second anode and the third anode on the base substrate do not overlap.

11. The display substrate according to claim 10, wherein: The orthographic projection of the sub-pixel opening of the first color sub-pixel of the same color in each pixel unit on the base substrate is located within the orthographic projection of the same first anode on the base substrate.

12. The display substrate according to claim 10, wherein: The first anode includes a first sub-anode corresponding to one of the first color sub-pixels, and a second sub-anode corresponding to another of the first color sub-pixels; The orthographic projections of the first sub-anode and the second sub-anode on the base substrate do not overlap.

13. The display substrate according to claim 12, wherein: The display substrate also includes: A control circuit is arranged between the anode layer and the base substrate, and the control circuit includes a first control subcircuit for controlling the conduction state of the first sub-anode and a second control subcircuit for controlling the conduction state of the second sub-anode.

14. The display substrate according to claim 13, wherein: The control circuit is configured as follows: The first sub-anode is controlled to be turned on through the first control sub-circuit, and when the current flowing through the first sub-anode is greater than or equal to half of the maximum current, the second sub-anode is controlled to be turned on through the second control sub-circuit.

15. The display substrate according to claim 13, wherein: The control circuit is configured to: during a first time period, control the first sub-anode to be conductive through a first control sub-circuit, and control the second sub-anode to be non-conductive through a second control sub-circuit; and In the second time period, the first sub-anode is controlled to be non-conductive by the first control sub-circuit, and the second sub-anode is controlled to be conductive by the second control sub-circuit.

16. The display substrate according to claim 6, wherein: The first color sub-pixel includes a blue sub-pixel, the second color sub-pixel includes a green sub-pixel, and the third color sub-pixel includes a red sub-pixel; Among them, the ratio of S2 / S3 is in the range of 1 to 2.

5.

17. The display substrate according to any one of claims 1 to 3, wherein: The orthographic projection of the sub-pixel opening on the base substrate is a square or a rectangle.

18. The display substrate according to any one of claims 1 to 3, wherein: The orthographic projection of the sub-pixel opening on the base substrate has a first side close to an adjacent sub-pixel opening; The orthographic projection of the sub-pixel lens corresponding to the sub-pixel opening on the base substrate has a first arc edge close to an adjacent sub-pixel lens, and the first side edge and the first arc edge are located on the same side of the orthographic projection. There is a maximum distance D3 between the first side edge and the first arc edge, and the maximum distance D3 is smaller than the second distance D2.

19. A method for manufacturing a display substrate, wherein: The display substrate has a display area, and the manufacturing method includes: providing a substrate, A plurality of pixel units are formed on one side of the base substrate, the plurality of pixel units are arranged in an array in the display area, each pixel unit includes a plurality of sub-pixels, and the sub-pixels include sub-pixel openings defined by a pixel defining layer disposed on the base substrate; A plurality of sub-pixel lenses are formed on a side of the pixel defining layer away from the base substrate, and a pixel defining layer on a side of the sub-pixel lenses close to the base substrate has corresponding sub-pixel openings; Wherein, the multiple sub-pixels included in each pixel unit include at least two sub-pixels of the same color, The orthographic projection of the sub-pixel opening on the base substrate is a parallelogram, the orthographic projection of the sub-pixel lens on the base substrate is a circle, and the orthographic projection of the sub-pixel opening on the base substrate is located within the orthographic projection of the corresponding sub-pixel lens on the base substrate; Adjacent sides of two adjacent sub-pixel openings are arranged in parallel, and adjacent sides of adjacent sub-pixel openings have a first distance D1; the nearest points between adjacent sub-pixel lenses have a second distance D2, and the second distance D2 is smaller than the first distance D1.

20. A display device, wherein: The invention comprises the display substrate as claimed in any one of claims 1 to 18.

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