Display substrate and its manufacturing process, display device

Abstract

The present invention provides a display substrate comprising: a base substrate; a plurality of pixel units arranged in an array in a display area, each pixel unit comprising a plurality of subpixels, each subpixel comprising a subpixel aperture defined by a pixel definition layer arranged on the base substrate; and a plurality of subpixel lenses arranged in an array on a side of the pixel definition layer remote from the base substrate. Each pixel unit comprises at least two subpixels of the same color. An orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, and an orthographic projection of the subpixel lens onto the base substrate is a circle. The orthographic projection of each subpixel aperture onto the base substrate lies within the orthographic projection of the corresponding subpixel lens onto the base substrate.Adjacent side edges of two neighboring subpixel apertures are arranged parallel to each other. A first distance D1 exists between the adjacent side edges of the neighboring subpixel apertures, and a second distance D2 exists between the nearest points of the neighboring subpixel lenses, where the second distance D2 is smaller than the first distance D1.

Description

TECHNICAL AREA

[0001] The present disclosure relates to the field of display technology, in particular a display substrate and a method for producing the same, as well as a display device. STATE OF THE ART

[0002] OLED display technology is gradually maturing, but some problems remain. For example, the brightness of OLED pixels is low, and as mobile devices and other devices increasingly demand higher pixel density, the pixel aperture ratio is also subject to certain limitations. With this technology, pixel brightness can be increased by increasing the current, but this significantly reduces the display's lifespan. Brightness can be increased by adding a lens to the OLED, but this reduces the display's pixel density based on the original aperture ratio, making it impossible to develop displays with both high brightness and a high aperture ratio.

[0003] The information disclosed in this section is provided solely for the purpose of understanding the background of the technical concept presented in this disclosure. Therefore, the information mentioned above may contain elements that do not represent prior art. REVELATION OF THE INVENTION

[0004] In one aspect, a display substrate with a display area is provided, comprising: a base substrate; a plurality of pixel units arranged in an array within the display area, each pixel unit comprising a plurality of subpixels encompassing the subpixel apertures defined by a pixel definition layer located on the base substrate; and a plurality of subpixel lenses arranged in an array on a side of the pixel definition layer furthest from the base substrate. The pixel definition layer on a side of the subpixel lens close to the base substrate has corresponding subpixel apertures. The plurality of subpixels encompassed in each pixel unit includes at least two subpixels of the same color. An orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, and an orthographic projection of the subpixel lens onto the base substrate is a circle.The orthographic projection of the subpixel aperture onto the base substrate lies within the orthographic projection of the corresponding subpixel lens onto the base substrate. Adjacent side edges of two neighboring subpixel apertures are arranged parallel to each other. A first distance D1 exists between the adjacent side edges of the neighboring subpixel apertures, and a second distance D2 exists between the nearest points of the neighboring subpixel lenses, where the second distance D2 is smaller than the first distance D1.

[0005] In some exemplary embodiments of the present disclosure, the diameters of the orthographic projections of the plurality of subpixel lenses onto the base substrate are equal.

[0006] In some exemplary embodiments of the present disclosure, an orthographic projection of the center point of the subpixel lens onto the base substrate coincides with an orthographic projection of the center point of the corresponding subpixel aperture onto the base substrate.

[0007] In some exemplary embodiments of the present disclosure, each pixel unit comprises two first color subpixels of the same color, a second color subpixel of a different color than the first color subpixel, and a third color subpixel of a different color than the first and second color subpixels. A first subpixel lens corresponding to the first color subpixel has a first center point, a second subpixel lens corresponding to the second color subpixel has a second center point, and a third subpixel lens corresponding to the third color subpixel has a third center point, wherein the first center point, the second center point, and the third center point are successively connected to form a square.

[0008] In some exemplary embodiments of the present disclosure, the subpixels encompassed in the plurality of pixel units are arranged at intervals in a first and a second direction, the first direction and the second direction intersecting. The first distance D1 comprises: a first directional distance D11 between the adjacent side edges of the subpixels adjacent in the first direction; and a second directional distance D12 between the adjacent side edges of the subpixels adjacent in the second direction; the second directional distance D12 is greater than or equal to the first directional distance D11.

[0009] In some exemplary embodiments of the present disclosure, the first color subpixel comprises a first subpixel opening, the second color subpixel comprises a second subpixel opening, and the third color subpixel comprises a third subpixel opening; an area S1 of the first subpixel opening, an area S2 of the second subpixel opening, and an area S3 of the third subpixel opening satisfy the following relationship: S1 ≥ S2 ≥ S3.

[0010] In some exemplary embodiments of the present disclosure, an orthographic projection of the first subpixel aperture onto the base substrate is inscribed in an orthographic projection of the first subpixel lens onto the base substrate.

[0011] In some exemplary embodiments of the present disclosure, an orthographic projection of the second subpixel aperture onto the base substrate is inscribed in an orthographic projection of the second subpixel lens onto the base substrate.

[0012] In some exemplary embodiments of the present disclosure, an orthographic projection of the third subpixel aperture onto the base substrate is inscribed in an orthographic projection of the third subpixel lens onto the base substrate.

[0013] In some exemplary embodiments of the present disclosure, the display substrate further comprises an anode layer arranged between the pixel definition layer and the base substrate. The orthographic projection of the subpixel aperture onto the base substrate lies within an orthographic projection of the anode layer onto the base substrate. The anode layer comprises: a first anode corresponding to the first color subpixel; a second anode corresponding to the second color subpixel; and a third anode corresponding to the third color subpixel. The orthographic projections of the first anode, the second anode, and the third anode onto the base substrate do not overlap.

[0014] In some exemplary embodiments of the present disclosure, the orthographic projections of the first subpixel openings of the first color subpixels of the same color in each pixel unit onto the base substrate are located within the orthographic projection of the same first anode onto the base substrate.

[0015] In some exemplary embodiments of the present disclosure, the first anode comprises a first subanode corresponding to one of the first color subpixels and a second subanode corresponding to another of the first color subpixels; the orthographic projections of the first subanode and the second subanode onto the base substrate do not overlap.

[0016] In some exemplary embodiments of the present disclosure, the display substrate further comprises a control circuit arranged between the anode layer and the base substrate, wherein the control circuit comprises a first control sub-circuit for controlling the on-state of the first partial anode and a second control sub-circuit for controlling the on-state of the second partial anode.

[0017] In some exemplary embodiments of the present disclosure, the control circuit is configured to control the first partial anode via the first control sub-circuit so that it is switched on, and, if a current flowing through the first partial anode is greater than or equal to half the maximum current, to control the second partial anode via the second control sub-circuit so that it is switched on.

[0018] In some exemplary embodiments of the present disclosure, the control circuit is configured to: in a first period, control the first partial anode via the first control sub-circuit so that it is switched on, and simultaneously control the second partial anode via the second control sub-circuit so that it is not switched on; and in a second period, control the first partial anode via the first control sub-circuit so that it is not switched on, and simultaneously control the second partial anode via the second control sub-circuit so that it is switched on.

[0019] In some exemplary embodiments of the present disclosure, the first color subpixel comprises a blue subpixel, the second color subpixel comprises a green subpixel, and the third color subpixel comprises a red subpixel; wherein the ratio of S2 / S3 is in the range of 1 to 2.5.

[0020] In some exemplary embodiments of the present disclosure, an orthographic projection of the subpixel aperture onto the base substrate is a square or a rectangle.

[0021] In some exemplary embodiments of the present disclosure, the orthographic projection of the subpixel aperture onto the base substrate has a first side edge near an adjacent subpixel aperture; the orthographic projection of the subpixel lens corresponding to the subpixel aperture onto the base substrate has a first arc edge near an adjacent subpixel lens, wherein the first side edge and the first arc edge are on the same side of the orthographic projections, and there is a maximum distance D3 between the first side edge and the first arc edge, which is smaller than the second distance D2.

[0022] In another aspect of the embodiments of the present disclosure, a method for producing a display substrate is provided, wherein the display substrate has a display area, and the method for producing it comprises: Providing a base substrate,

[0023] Forming a plurality of pixel units on one side of the base substrate, arranged in an array in the display area, each pixel unit comprising a plurality of subpixels, the subpixels comprising the subpixel apertures defined by a pixel definition layer arranged on the base substrate;

[0024] Forming a plurality of subpixel lenses on a side of the pixel definition layer far from the base substrate, wherein the pixel definition layer has corresponding subpixel apertures on a side of the subpixel lens close to the base substrate; wherein the plurality of subpixels encompassed in each pixel unit includes at least two subpixels of the same color, wherein an orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, an orthographic projection of the subpixel lens onto the base substrate is a circle, and the orthographic projection of the subpixel aperture onto the base substrate is within the orthographic projection of the corresponding subpixel lens onto the base substrate; wherein adjacent side edges of two adjacent subpixel apertures are arranged parallel, a first distance D1 exists between the adjacent side edges of the adjacent subpixel apertures, a second distance D2 exists between the nearest points of the adjacent subpixel lenses, the second distance D2 being smaller than the first distance D1.

[0025] According to another aspect of the embodiments of the present disclosure, a display device is provided which comprises the display substrate described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Features and advantages of the present disclosure become clearer through the detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. Fig. Figure 1 is a schematic diagram of a plan structure of a display substrate according to an exemplary embodiment of the present disclosure; Fig. 2A is a partially enlarged diagram of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure; Fig. 2B is a schematic structural diagram of a partial section of an indicator substrate according to an exemplary embodiment of the present disclosure along a line BB in Fig. 2; Fig. 2C is a schematic structural diagram of a partial section of an indicator substrate according to another exemplary embodiment of the present disclosure along line CC in Fig. 2; Fig. Figure 3 is a partially enlarged diagram of a pixel unit of a display substrate according to another exemplary embodiment of the present disclosure; Fig. Figure 4 is a partially enlarged diagram of a pixel unit of a display substrate according to a further exemplary embodiment of the present disclosure; Fig. Figure 5 is a schematic structure diagram of the dimensions of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure; Fig. Figure 6 is a schematic structure diagram of the dimensions of a pixel unit of a display substrate according to another exemplary embodiment of the present disclosure; Fig. Figure 7 is a schematic structure diagram of a display device according to an exemplary embodiment of the present disclosure.

[0027] It should be noted that in the drawings used to describe the embodiments of the present disclosure, the dimensions of the layers, structures or areas may be enlarged or reduced for the sake of clarity, i.e., these drawings are not drawn to scale. DETAILED EXECUTION FORMS

[0028] To clarify the purpose, technical solutions, and advantages of the embodiments of this disclosure, the technical solutions of the embodiments of this disclosure are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a subset of the embodiments of this disclosure and not all of them. Based on the described embodiments of this disclosure, all other embodiments that a person skilled in the art obtains without inventive work fall within the scope of protection of this disclosure.

[0029] It should be noted that in the drawings, the dimensions and relative dimensions of elements may be enlarged for the purposes of clarity and / or description. Therefore, the dimensions and relative dimensions of various elements are not necessarily limited to those shown in the drawings. In the description and the drawings, identical or similar reference numerals indicate identical or similar parts.

[0030] When an element is described as "attached to," "connected to," or "bound to" another element, the element may be directly attached to, directly connected to, or directly bound to the other element, or intermediate elements may be present. However, when the element is described as "immediately on," "immediately connected to," or "immediately bound to" another element, there is no intermediate element. Other terms and / or expressions used to describe relationships between elements should be interpreted similarly, e.g., "between..." as opposed to "immediately between...", "adjacent to" as opposed to "immediately adjacent to," or "on..." as opposed to "immediately upon...", etc. Furthermore, the term "connection" may refer to a physical connection, an electrical connection, a communication connection, and / or a fluid connection.Furthermore, the X-axis, Y-axis, and Z-axis are not limited to the three axes of a Cartesian coordinate system and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis can be perpendicular to each other or 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 of the group consisting of X, Y, and Z” can be understood 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 in the text, the term “and / or” includes all and any combination of one or more of the relevant elements listed.

[0031] It must be explained that while the terms “first,” “second,” etc., may be used herein to describe various parts, components, elements, regions, layers, and / or sections, these parts, components, elements, regions, layers, and / or sections should not be limited by these terms. Rather, these terms are used to distinguish one part, component, element, region, layer, and / or section from another. For example, a first part, component, element, region, layer, and / or section discussed below could be referred to as a second part, component, element, region, layer, and / or section without deviating from the teachings of the present revelation.

[0032] To simplify the description, spatial relationship terms such as "above," "below," "left," "right," etc., can be used to describe the relationship of one element or feature to another, as shown in the drawings. It should be understood that these spatial relationship terms are intended to encompass not only the orientation shown in the drawings but also other different orientations of the device in use or operation. For example, if the device is turned upside down in the drawings, elements described as "below" or "under" other elements or features will be oriented "above" or "above" them.

[0033] It should be explained that in this text, the expression "same layer" refers to a layered structure formed as follows: A film layer is formed by the same film-forming process used to create a specific pattern; and subsequently, this film layer is patterned by a single pattern-forming process using the same mask. Depending on the specific pattern, a pattern-forming process may involve multiple exposure, development, or etching processes. The specific pattern in the formed layered structure may be continuous or discontinuous. That is, several elements, parts, structures, and / or sections arranged on the "same layer" are made of the same material and are formed by the same pattern-forming process. Typically, several elements, parts, structures, and / or sections located on the "same layer" have approximately the same thickness.

[0034] The person skilled in the art should understand that, unless otherwise specified, in this text the term ‘height’ or ‘thickness’ refers to the dimension of the surface of each film layer arranged perpendicular to the display substrate, i.e. the dimension along the light output direction of the display substrate or the dimension along the normal direction of the display device.

[0035] In this text, the directional terms "first direction" and "second direction" are used to describe different directions along the pixel area, for example, the longitudinal and transverse directions of the pixel area or the row and column directions of the subpixel arrangement. It should be understood that such terms are merely exemplary descriptions and do not constitute limitations of the present disclosure.

[0036] Some exemplary embodiments of the present disclosure provide a display substrate having a display area. The display substrate comprises, but is not limited to: a base substrate; a plurality of pixel units arranged in an array in the display area, each pixel unit comprising a plurality of subpixels, each subpixel comprising a subpixel aperture defined by a pixel definition layer arranged on the base substrate; a plurality of subpixel lenses arranged in an array on a side of the pixel definition layer furthest from the base substrate. The pixel definition layer on a side of each subpixel lens close to the base substrate has a corresponding subpixel aperture. The plurality of subpixels comprised in each pixel unit includes at least two subpixels of the same color.An orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, and an orthographic projection of the subpixel lens onto the base substrate is a circle. The orthographic projection of each subpixel aperture onto the base substrate lies within the orthographic projection of the corresponding subpixel lens onto the base substrate. Adjacent side edges of two neighboring subpixel apertures are parallel. There is a first distance D1 between the adjacent side edges of neighboring subpixel apertures, and a second distance D2 between the nearest points of neighboring subpixel lenses, where the second distance D2 is smaller than the first distance D1.

[0037] In the display devices according to the embodiments of the present disclosure, the light output efficiency of the subpixels is increased by arranging a plurality of subpixel lenses on the side of the pixel definition layer furthest from the base substrate; in addition, in the manufacturing process of the boundary pixel aperture, the maximum aperture ratio in each pixel unit can be achieved by providing at least two subpixels of the same color in the pixel unit and simultaneously arranging adjacent side edges of two adjacent subpixel apertures in parallel.Furthermore, the process of determining the boundary distance between adjacent subpixel lenses ensures the maximum aperture ratio in each pixel unit by having a circular orthographic projection of the subpixel lens onto the base substrate, providing at least two subpixels of the same color in each pixel unit, and simultaneously ensuring that the second distance D2 between the nearest points of adjacent subpixel lenses is greater than the first distance D1 between adjacent side edges of adjacent subpixel apertures. In this way, the light output efficiency of the display substrate can be increased while simultaneously meeting the requirement for high pixel density.

[0038] Fig. Figure 1 is a schematic diagram of a plan structure of a display substrate according to an exemplary embodiment of the present disclosure.

[0039] As in Fig. As shown in Figure 1, the display substrate 100 comprises a display area AA and a non-display area NA.

[0040] The display area AA can be an area in which pixel units PX are arranged to display an image. Each pixel unit PX will be described later. The non-display area NA is an area in which no pixel unit PX is arranged; that is, it can be an area in which no image is displayed. The non-display area NA corresponds to a frame in a final display device, and the width of the frame can be determined according to the width of the non-display area NA.

[0041] The display area AA can have various shapes. For example, the display area AA can be configured in different shapes, such as a closed polygon with straight sides (e.g., a rectangle), a circle, an ellipse, etc., with curved sides, and a semicircle, semi-ellipse, etc., with both straight and curved sides. In the embodiments described in this disclosure, the display area AA is provided as a quadrilateral area with straight sides. It should be understood that these are merely exemplary embodiments of the present disclosure and do not constitute a limitation of the present disclosure.

[0042] The non-display area NA can be arranged on at least one side of the display area AA. In the embodiments of this disclosure, the non-display area NA can surround the outer circumference of the display area AA. In the embodiments of this disclosure, the non-display area NA can comprise a transverse section extending in the first direction X and a longitudinal section extending in the second direction Y.

[0043] The pixel unit PX is arranged in the display area AA. The pixel unit PX is the smallest unit for displaying an image, and its number can be multiple. For example, the pixel unit PX can comprise 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, sequentially in the first direction X and the second direction Y. A plurality of pixel units PX can be provided, arranged in the form of a matrix along the rows extending in the first direction X and the columns extending in the second direction Y. However, the embodiments of the present disclosure do not specifically restrict the arrangement of the pixel units PX, and the pixel units PX can be arranged in various shapes.For example, the pixel units PX can be arranged such that a direction inclined with respect to the first direction X and the second direction Y becomes a column direction, and a direction that crosses the column direction becomes a row direction.

[0044] That is, the multitude of pixel units PX is arranged in an array along the first direction X and the second direction Y to form multiple rows of pixel units and multiple columns of pixel units.

[0045] A pixel unit PX can comprise a plurality of subpixels. For example, a pixel unit PX can comprise four subpixels, namely a first subpixel SP1, a second subpixel SP2, a third subpixel SP3, and a fourth subpixel SP4. For example, the subpixels can be of different colors or of the same color, such as the first subpixel SP1 and the second subpixel SP2 being the same color, for example, blue subpixels; the third subpixel SP3 being a red subpixel; and the fourth subpixel SP4 being a green subpixel. In some embodiments of the present disclosure, four subpixels can be arranged along the first direction X and the second direction Y, such that a plurality of subpixels are arranged in an array within a pixel unit PX.

[0046] It should be noted that in the embodiments of the present disclosure, the number of subpixels contained in a pixel unit is not particularly limited and is not restricted to the four mentioned above, but can, for example, also be a number greater than 4. In this embodiment, the pixel unit is in Fig. 1 are merely exemplary and the dimensions of the pixel unit and subpixel may be enlarged or reduced in the drawings used to describe the embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale.

[0047] Fig. 2A is a partially enlarged diagram of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure. Fig. 2B is a schematic structural diagram of a partial section of an indicator substrate according to an exemplary embodiment of the present disclosure along a line BB in Fig. 2. Fig. 2C is a schematic structural diagram of a partial section of an indicator substrate according to another exemplary embodiment of the present disclosure along line CC in Fig. 2.

[0048] As in Fig. 1, Fig. 2A and Fig. As shown in Figure 2B, the display substrate 100 comprises a base substrate 10, on one side of the base substrate 10 a plurality of film layers are arranged, which include, for example, a buffer layer, a semiconductor layer, a gate layer, a source-drain layer, a plurality of insulating layers, a passivation layer, etc.

[0049] For example, as in Fig. Figure 2B shows a buffer layer 11 on one side of the base substrate 10, a semiconductor layer 12 on the side of the buffer layer 11 furthest from the base substrate, and a dielectric intermediate layer 13, a gate insulating layer 14, and a gate layer 15 on the side of the semiconductor layer 12 furthest from the base substrate. For example, the dielectric intermediate layer 13 is located on the side of the semiconductor layer 12, the gate insulating layer 14, and the gate layer 15 furthest from the base substrate 10. A source-drain layer 16 is located on the side of the dielectric intermediate layer 13 furthest from the base substrate 10 and is electrically connected to the semiconductor layer 12 via a through-hole. A passivation layer 17 is located on the side of the source-drain layer 16 furthest from the base substrate 10.On the side of the passivation layer 17 furthest from the base substrate 10, a second semiconductor layer 12 is arranged, and on the side of the second semiconductor layer 12 furthest from the base substrate 10, a dielectric intermediate layer 13, a second gate insulating layer 14, and a second gate layer 15 are arranged. For example, the second dielectric intermediate layer 13 is arranged on the side of the second semiconductor layer 12, the second gate insulating layer 14, and the second gate layer 15 furthest from the base substrate 10. On a side of the second dielectric intermediate layer 13 furthest from the base substrate 10, a second source-drain layer 16 is arranged, which is electrically connected to the second semiconductor layer 12 via a through-hole. A second passivation layer 17 is arranged on a side of the second source-drain layer 16 furthest from the base substrate 10.

[0050] As in Fig. As shown in Figure 1, a plurality of pixel units PX are arranged in an array in the display area AA of the display substrate 100 of the embodiment of the present disclosure, wherein each pixel unit PX comprises a plurality of subpixels and the plurality of subpixels in each pixel unit PX includes at least two subpixels of the same color. For example, each pixel unit comprises four subpixels, and the four subpixels comprise subpixels of three colors, i.e., in the four pixels there are two subpixels of the same color.

[0051] In some alternative embodiments, each pixel unit of the display substrate comprises more than two subpixels of the same color, for example, four or more subpixels. In some other alternative embodiments, each pixel unit of the display substrate comprises subpixels of different colors, and the number of subpixels of each color can be multiple.

[0052] As in Fig. 2A and Fig. As shown in Figure 2B, each subpixel comprises a subpixel aperture 201, which is defined by a pixel definition layer 20 arranged on a base substrate. For example, a pixel definition layer 20 is arranged on a side of the passivation layer 17 away from the base substrate 10.

[0053] A multitude of subpixel lenses 30 are arranged in an array on a side of the pixel definition layer 20 furthest from the base substrate 10. Each subpixel lens 30 has a corresponding subpixel aperture 201 on its side closest to the base substrate 10. The subpixel apertures 201 are coated with light-emitting materials of different colors, so that different subpixels generate light of different colors. The subpixel lens 30 is located on a side of the pixel definition layer 20 furthest from the base substrate 10 and covers the side of the subpixel apertures 201 furthest from the base substrate 10. This focuses the light generated by the light-emitting materials in the subpixel aperture, thereby increasing the light output efficiency of each subpixel and thus improving the overall light output efficiency and display effect of the entire display substrate.

[0054] The orthographic projection of subpixel aperture 201 onto the base substrate is a parallelogram; for example, the orthographic projection of subpixel aperture 201 onto base substrate 10 is a square and / or a rectangle, i.e., the orthographic projections of the subpixel apertures in each pixel unit onto the base substrate can be square or rectangular. The subpixel apertures contained in each pixel unit can be either square or rectangular. For example, the subpixel apertures are all square, all rectangular, or a mixed pattern of square and rectangular shapes.

[0055] As in Fig. As shown in Figure 2B, a side of the section of the subpixel lens 30 furthest from the base substrate has an arc-shaped surface that can collect the light emitted by the light-emitting material to increase the light output brightness of the subpixel and improve the brightness of the display substrate. The orthographic projection of the subpixel lens 30 onto the base substrate 10 is a circle. As shown in Fig. As shown in Figure 2A, the subpixel lens 30, viewed from a direction perpendicular to the surface of the display substrate, is a circle. The orthographic projection of each subpixel aperture 201 onto the base substrate 10 lies within the orthographic projection of the corresponding subpixel lens 30 onto the base substrate.

[0056] By adjusting the orthographic projection of the subpixel aperture onto the base substrate so that it lies within the orthographic projection of the subpixel lens onto the base substrate, it is ensured that each subpixel lens can have a good light-focusing effect on the light emitted by the light-emitting material in the subpixel aperture, thereby increasing the light output rate and light output brightness.

[0057] In some embodiments of the present disclosure, a plurality of pixel units are arranged in an array in the first direction X and the second direction Y, and the subpixels in each pixel unit are also arranged in an array in the first direction X and the second direction Y, and adjacent side edges of adjacent subpixel openings are arranged in parallel.

[0058] In some embodiments of the present disclosure, the pixel unit PX comprises three color subpixels, i.e., each pixel unit comprises three colors. For example, the first color subpixel is a blue subpixel, and there may be two or more first color subpixels. The second color subpixel is a red subpixel, and the third color subpixel is a green subpixel. In some other embodiments, the pixel unit may contain more color subpixels.

[0059] Fig. Figure 2A schematically shows a planar structure diagram of a pixel unit. The pixel unit comprises four subpixels: a first subpixel SP1, a second subpixel SP2, a third subpixel SP3, and a fourth subpixel SP4. The first subpixel SP1 comprises a first subpixel aperture 2011 and a first subpixel lens 301; the second subpixel SP2 comprises a second subpixel aperture 2012 and a second subpixel lens 302; the third subpixel SP3 comprises a third subpixel aperture 2013 and a third subpixel lens 303; and the fourth subpixel SP4 comprises a fourth subpixel aperture 2014 and a fourth subpixel lens 304. The first subpixel SP1 and the second subpixel SP2 are specified as the subpixels for representing the same color, i.e., the first subpixel aperture 2011 and the second subpixel aperture 2012 are filled with the same light-emitting material.For example, the first subpixel SP1 and the second subpixel SP2 are both used to emit blue light; that is, the first subpixel SP1 and the second subpixel SP2 are both blue subpixels. The third subpixel SP3 can be used, for example, to emit red light; that is, the third subpixel SP3 is a red subpixel. The fourth subpixel SP4 can be used, for example, to emit green light; that is, the fourth subpixel SP4 is a green subpixel.

[0060] In the manufacturing of an OLED display substrate, the minimum distance between adjacent subpixel apertures (i.e., the width of the pixel definition layer between adjacent subpixel apertures) depends on the manufacturing process. Once the manufacturing process reaches its limit, the minimum distance between adjacent subpixel apertures becomes the limiting dimension of the manufacturing process. As the demand for high pixel density increases, so does the number of pixel units per unit area, and consequently, the number of subpixel apertures per unit area also increases, inevitably leading to a gradual decrease in the pixel pitch ratio.In order to achieve the maximum aperture ratio at the limit dimension of the manufacturing process, it is provided that adjacent side edges of adjacent subpixel apertures are arranged parallel, and that the dimension of the pixel definition layer between adjacent subpixel apertures is equal to the limit dimension of the manufacturing process, thereby achieving the maximum aperture ratio at the limit dimension of the manufacturing process.

[0061] As in Fig. As shown in Figure 2A, adjacent side edges of two adjacent subpixel apertures 201 are arranged parallel to each other. For example, in the first direction X, the first subpixel SP1 and the fourth subpixel SP4 are adjacent to each other. The first subpixel aperture 2011 of the first subpixel SP1 has a side edge close to the fourth subpixel, and the fourth subpixel aperture 2014 of the fourth subpixel SP4 has a side edge close to the first subpixel, and the two adjacent side edges have a first distance D1.

[0062] In another example, in the second direction Y, the first subpixel SP1 and the second subpixel SP2 are adjacent to each other, the first subpixel aperture 2011 of the first subpixel SP1 has a side close to the second subpixel SP2, the second subpixel aperture 2012 of the second subpixel SP2 has a side close to the first subpixel, and the two adjacent side edges have a first distance D1.

[0063] In some embodiments of the present disclosure, the diameters of the orthographic projections of the plurality of subpixel lenses onto the base substrate 10 are equal. That is, the plurality of subpixel lenses 30 are set to the same size, and there is a second distance D2 between adjacent subpixel lenses 30. Since the second distance D2 is the minimum distance required to form subpixel lenses 30, the maximum number of subpixel lenses can be formed within a unit area to improve the light-focusing effect of the subpixel.

[0064] In the embodiments described in the present disclosure, the second distance D2 is smaller than the first distance D1. That is, the subpixel aperture does not completely overlap with the subpixel lens. In the relevant technology, the light output efficiency of the subpixel is increased by ensuring that the subpixel aperture completely overlaps with the subpixel lens. However, if the subpixel aperture and the subpixel lens completely overlap, the subpixel aperture is circular, and the distances between the circles are smaller than the parallel side edges. This results in a lower pixel aperture ratio, and the design requirements for a high-density pixel array cannot be met. By setting the second distance D2 smaller than the first distance D1, the pixel aperture ratio is increased to meet the design requirements for high-density pixel arrays.

[0065] In some embodiments of the present disclosure, the orthographic projection of the center point of each subpixel lens onto the base substrate coincides with the orthographic projection of the center point of the corresponding subpixel aperture onto the base substrate. As in Fig. As shown in Figure 2A, the orthographic projection of the center point of the first subpixel lens 301 onto the base substrate coincides with the orthographic projection of the center point of the first subpixel aperture 2011 onto the base substrate 10, representing a point O1. The orthographic projection of the center point of the second subpixel lens 302 onto the base substrate 10 coincides with the orthographic projection of the center point of the second subpixel aperture 2012 onto the base substrate 10, representing a point O2. The orthographic projection of the center point of the third subpixel lens 303 onto the base substrate 10 coincides with the orthographic projection of the center point of the third subpixel aperture 2013 onto the base substrate 10, representing a point O3.The orthographic projection of the center point of the fourth subpixel lens 304 onto the base substrate 10 coincides with the orthographic projection of the center point of the fourth subpixel aperture 2014 onto the base substrate 10, which represents a point O4.

[0066] According to the embodiments described in the present disclosure, it is provided that the orthographic projection of the center point of each subpixel lens onto the base substrate coincides with the orthographic projection of the center point of the corresponding subpixel aperture onto the base substrate, so that the subpixel lens has a better converging effect on the light emitted by the light-emitting material filled into the subpixel aperture and thereby increases the light output intensity of each subpixel.

[0067] In some embodiments of the present disclosure, the display substrate can have a maximum pixel aperture ratio and simultaneously increase the light output efficiency and light output intensity of the display substrate as a whole by ensuring that the orthographic projection of each subpixel aperture onto the base substrate is within the orthographic projection of the corresponding subpixel lens onto the base substrate and that the diameters of the orthographic projections of the plurality of subpixel lenses onto the base substrate are equal.

[0068] In the Fig. In the embodiment shown in Figure 2A, each pixel unit PX comprises a first subpixel SP1 and a second subpixel SP2 of the same color, a third subpixel SP3 of a different color than the first subpixel SP1 and the second subpixel SP2, and a fourth subpixel SP4 of a different color than the first subpixel and the third subpixel.

[0069] In the manufacturing process of subpixel lenses, the second distance D2 between adjacent subpixel lenses must be greater than or equal to the limit dimension of the manufacturing process for producing the subpixel lenses. If the second distance D2 between adjacent subpixel lenses is smaller than the limit dimension of the manufacturing process for producing the subpixel lenses, the manufactured subpixel lenses cannot achieve the light-focusing effect, or defects may even occur, thereby reducing the display effect of the display substrate or even causing product defects.To avoid the aforementioned problems, in some embodiments of the present disclosure, each subpixel lens has a center point, and the centers of the subpixel lenses corresponding to the four subpixels mentioned above are connected sequentially to form a square, for example, point O1, point O2, point O3 and point O4 are connected sequentially 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 boundary processes of the manufacturing process of the subpixel lens, such that the subpixel lenses can largely cover the subpixel apertures within a unit area without creating defects or reducing the light-focusing effect, thereby improving the light-focusing effect of the light generated by the light-emitting material in the subpixel aperture.At the same time, to maximize the pixel aperture ratio on the display substrate, each subpixel aperture is designed as a rectangle or square, significantly increasing the pixel aperture ratio per unit area and meeting the design requirements for high-resolution display substrates.

[0070] As in Fig. As shown in 2A, the subpixels comprise the subpixels spaced at intervals along the first direction X and the subpixels spaced at intervals along the second direction Y, and the first distance D1 between adjacent side edges of adjacent subpixel apertures comprises: a first directional distance D11 of the adjacent side edges from the subpixels adjacent in the first direction, and a second directional distance D12 of the adjacent side edges from the subpixels adjacent in the second direction Y.

[0071] For example, the first subpixel aperture 2011 of the first subpixel SP1 comprises four side edges: 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 aperture 2014 of the fourth subpixel SP4 comprises four side edges: side edge 2014A, side edge 2014B, side edge 2014C, and side edge 2014D. Side edge 2011A of the first subpixel aperture 2011 is adjacent to side edge 2014C of the fourth subpixel aperture 2014, and the distance between side edge 2011A and side edge 2014C is the first directional distance D11.

[0072] In another example, the first subpixel SP1 is adjacent to the second subpixel SP2 in the second direction Y, and the second subpixel aperture 2012 of the second subpixel SP2 comprises four side edges: side edge 2012A, side edge 2012B, side edge 2012C, and side edge 2012D. Side edge 2011D of the first subpixel aperture 2011 is adjacent to side edge 2012B of the second subpixel aperture 2012, and the distance between side edge 2011D and side edge 2012B is the second directional distance D12.

[0073] In the Fig. In the embodiment shown in Figure 2A, the first directional spacing D11 is equal to the second directional spacing D12. By setting the first directional spacing D11 equal to the second directional spacing D12, each pixel unit in the display substrate can have maximum aperture efficiency, thus meeting the requirement for high resolution.

[0074] As in Fig. As shown in Figure 2A, the orthographic projection of each subpixel aperture onto the base substrate has a first side edge located near an adjacent subpixel aperture, and the orthographic projection of the subpixel lens corresponding to the subpixel aperture onto the base substrate has a first arc edge located near an adjacent subpixel lens, with the first side edge and the first arc edge being on the same side of the orthographic projections. For example, the first subpixel aperture 2011 has a first side edge 2011A located near the fourth subpixel aperture 2014. The orthographic projection of the subpixel lens 301, corresponding to the first subpixel aperture 2011, onto the base substrate has a first arc edge 301A located near the adjacent subpixel lens 304, and there is a maximum distance D3 between the first side edge 2011A and the first arc edge 301A.By setting the maximum distance D3 smaller than the second distance D2, the area of ​​the pixel opening not covered by each subpixel lens is minimized, thereby increasing the pixel density of the display substrate as much as possible while ensuring brightness improvement and the maximum pixel aperture ratio. In this way, the design requirements of high-resolution display substrates are met.

[0075] As in Fig. As shown in Figure 2A, the area of ​​the first subpixel aperture is 2011 S11, the area of ​​the second subpixel aperture is 2012 S12, the area of ​​the third subpixel aperture is 2013 S13, and the area of ​​the fourth subpixel aperture is 2014 S14, where S11=S12=S13=S14; i.e., the areas of all subpixel apertures in a pixel unit are equal.

[0076] The first and second subpixels are blue subpixels of the same color, the third subpixel is red, and the fourth subpixel is green. The orthographic projection of the first subpixel aperture onto the base substrate is inscribed in the orthographic projection of the first subpixel lens onto the base substrate, and the orthographic projection of the second subpixel aperture onto the base substrate is inscribed in the orthographic projection of the second subpixel lens onto the base substrate. The orthographic projection of the third subpixel aperture onto the base substrate is inscribed in the orthographic projection of the third subpixel lens onto the base substrate. The orthographic projection of the fourth subpixel aperture onto the base substrate is inscribed in the orthographic projection of the fourth subpixel lens onto the base substrate.

[0077] According to the embodiments of the present disclosure, the non-overlapping area between the subpixel lens and the subpixel aperture is reduced by adjusting the orthographic projection of a subpixel aperture in a pixel unit onto the base substrate such that it is inscribed in the orthographic projection of the corresponding subpixel lens onto the base substrate, thereby increasing the pixel aperture ratio in the pixel unit.

[0078] Fig. Figure 3 is a partially enlarged diagram of a pixel unit of a display substrate according to another exemplary embodiment of the present disclosure.

[0079] In another embodiment of the present disclosure and as in Fig. As shown in Figure 3, the first subpixel SP1 and the second subpixel SP2 are blue subpixels of the same color, the third subpixel SP3 is a red subpixel and the fourth subpixel SP4 is a green subpixel.

[0080] The orthographic projection of the first subpixel aperture 2011 onto the base substrate is inscribed in the orthographic projection of the first subpixel lens 301 onto the base substrate. The orthographic projection of the second subpixel aperture 2012 onto the base substrate is inscribed in the orthographic projection of the second subpixel lens 302 onto the base substrate. Meanwhile, the orthographic projection of the third subpixel aperture 2013 onto the base substrate is within the orthographic projection of the third subpixel lens 303 onto the base substrate, and the orthographic projection of the third subpixel aperture 2013 onto the base substrate is not inscribed in the orthographic projection of the third subpixel lens 303 onto the base substrate.The orthographic projection of the fourth subpixel aperture 2014 onto the base substrate is within the orthographic projection of the fourth subpixel lens 304 onto the base substrate, and the orthographic projection of the fourth subpixel aperture 2014 onto the base substrate is not inscribed in the orthographic projection of the fourth subpixel lens 304 onto the base substrate. That is, in this embodiment, the area S11 of the first subpixel opening 2011 is equal to the area S12 of the second subpixel opening 2012, and S11 and S12 are larger than the area S13 of the third subpixel opening 2013, and S13 is larger than the area S14 of the fourth subpixel opening 2014. Therefore, S11 = S12 > S13 > S14, meaning that the area of ​​the blue subpixel in a pixel unit is the largest, the area of ​​the red subpixel is smaller than the area of ​​the blue subpixel, and the area of ​​the green subpixel is smaller than the area of ​​the red subpixel.

[0081] In some alternative embodiments, the area of ​​the blue subpixel is the largest in a pixel unit, the area of ​​the red subpixel is smaller than the area of ​​the blue subpixel, and the area of ​​the green subpixel is equal to the area of ​​the red subpixel.

[0082] In other embodiments, in order to satisfy the white balance setting of the display substrate, while maintaining the second distance D2 of the subpixel lenses, the dimensions of the subpixel apertures in each pixel unit are adjusted accordingly, for example: the area of ​​the subpixel aperture of the blue subpixel is maintained, the area of ​​the subpixel aperture of the red subpixel is reduced, and the area of ​​the subpixel aperture of the green subpixel is reduced.

[0083] For example, the area S11 of the first subpixel aperture is equal to the area S12 of the second subpixel aperture. The area S13 of the third subpixel aperture and the area S14 of the fourth subpixel aperture are smaller than the areas S11 and S12, and the ratio of area S13 to area S14 is in the range of 1 to 2.5, so that the display substrate has a better white balance effect.

[0084] Fig. Figure 4 is a partially enlarged diagram of a pixel unit of a display substrate according to a further exemplary embodiment of the present disclosure.

[0085] In some other embodiments of the present disclosure and as in Fig. As shown in Figure 4, the orthographic projections of the four subpixel apertures in the pixel unit onto the base substrate are rectangular. In this embodiment, the first subpixel SP1' and the second subpixel SP2' are blue subpixels of the same color, the third subpixel SP3' is a red subpixel, and the fourth subpixel SP4' is a green subpixel, with the four subpixels in a pixel unit having the same area.

[0086] The subpixels comprise the subpixels arranged at intervals along a first direction X and the subpixels arranged at intervals along a second direction Y. A first distance D1 between adjacent side edges of adjacent subpixel openings comprises: a first directional distance D11 of the adjacent side edges from the subpixels adjacent in the first direction and a directional distance D12 of the adjacent side edges from the subpixels adjacent in the second direction Y.

[0087] As shown in the figure, the first subpixel aperture 2011' of the first subpixel SP1' comprises four side edges, namely a side edge 2011A', a side edge 2011B', a side edge 2011C', and a side edge 2011D'. The first subpixel SP1' is adjacent to the fourth subpixel SP4' in the first direction X. The fourth subpixel aperture 2014' of the fourth subpixel SP4' comprises four side edges, namely a side edge 2014A', a side edge 2014B', a side edge 2014C', and a side edge 2014D'. The side edge 2011A' of the first subpixel aperture 2011' is adjacent to the side edge 2014C' of the fourth subpixel aperture 2014', and the distance between the side edge 2011A' and the side edge 2014C' is the first directional distance D11'.The first subpixel SP1' is adjacent in the second direction Y to the second subpixel SP2', and the second subpixel aperture 2012' of the second subpixel SP2' comprises four side edges: side edge 2012A', side edge 2012B', side edge 2012C', and side edge 2012D'. The side edge 2011D' of the first subpixel aperture 2011' is adjacent to the side edge 2012B' of the second subpixel aperture 2012', and the distance between side edge 2011D' and side edge 2012B' is the second directional distance D12'. The second directional distance D12' is greater than the first directional distance D11'.

[0088] According to the embodiments of the present disclosure, by designing the subpixel openings in a pixel unit as a rectangular structure, the design of various display effects can be achieved without significantly reducing the opening ratio of the pixel units of the display substrate.

[0089] In some embodiments of the present disclosure and as in Fig. As shown in Figure 2B, the display substrate 100 further comprises an anode layer 40, which is arranged between the pixel definition layer 20 and the base substrate 10. More precisely, the anode layer 40 is arranged between the pixel definition layer 20 and the passivation layer 17, and the orthographic projection of the subpixel aperture onto the base substrate is located within the orthographic projection of the anode layer 40 onto the base substrate.

[0090] The anode layer 40 comprises one anode corresponding to each color subpixel, for example, a first anode corresponding to the first color subpixel; a second anode corresponding to the second color subpixel; and a third anode corresponding to the third color subpixel. The orthographic projections of the first anode, the second anode, and the third anode onto the base substrate do not overlap. That is, in each pixel unit, the subpixel corresponding to each color has one anode electrode, each used to provide electrical signals for subpixels of different colors.

[0091] In some exemplary embodiments of the present disclosure, the orthographic projections of the first subpixel openings of the first color subpixels of the same color in each pixel unit onto the base substrate are located within the orthographic projection of the same first anode onto the base substrate. As in Fig. As shown in Figure 2C, the first color subpixel comprises a first subpixel SP1 and a second subpixel SP2, and the first subpixel SP1 and the second subpixel SP2 can be implemented as blue subpixels. The orthographic projection of the first subpixel aperture of the first subpixel SP1 onto the base substrate and the orthographic projection of the second subpixel aperture of the second subpixel SP2 onto the base substrate lie within the orthographic projection of the same first anode onto the base substrate; that is, the first subpixel SP1 and the second subpixel SP2 share the same anode.

[0092] In some other exemplary embodiments of the present disclosure and as in Fig. As shown in Figure 2B, the first anode comprises a first subanode 401 corresponding to one of the first color subpixels and a second subanode 402 corresponding to another of the first color subpixels; the orthographic projections of the first subanode 401 and the second subanode 402 onto the base substrate do not overlap.

[0093] As in Fig. As shown in Figure 2B, the first subpixel SP1 and the second subpixel SP2 are both blue subpixels. The first subanode, corresponding to the first subpixel SP1, and the second subanode, corresponding to the second subpixel SP2, are distinct subanodes. Electrical signals for the first subpixel SP1 and the second subpixel SP2 are supplied via these distinct subanodes, facilitating separate control of the first and second subpixels of the same color within the same pixel unit. Specifically, an electrical signal is supplied to the first subpixel SP1 via the first subanode 401, and an electrical signal is supplied to the second subpixel SP2 via the second subanode 402.

[0094] As in Fig. As shown in Figure 2B, the display substrate 100 also includes a control circuit 50. The control circuit 50 is arranged between the anode layer 40 and the base substrate 10. For example, the control circuit 50 is a control circuit formed by the construction of several film layers, such as a semiconductor layer 12, a dielectric intermediate layer 13, a gate insulating layer 14, a gate layer 15, a source-drain layer 16, and a passivation layer 17. By inputting various electrical signals into the control circuit 50, the on-state of the subpixel anodes is controlled.

[0095] As in Fig. As shown in Figure 2B, the control circuit 50 comprises a first control sub-circuit 51 for controlling the on-state of the first sub-anode 401 and a second control sub-circuit 52 for controlling the on-state of the second sub-anode 402. When the first sub-anode 401 is switched on, the light-emitting material filled in the first pixel aperture emits light. When the second sub-anode 402 is switched on, the light-emitting material filled in the second pixel aperture emits light. The control of the light emission intensity is achieved by controlling the current flowing through the first sub-anode 401 and / or the second sub-anode 402 in the control circuit.

[0096] During the light emission process of the display substrate's subpixels, particularly when the pixel aperture is filled with organic light-emitting materials, prolonged light emission leads to a reduction in the lifespan of the light-emitting materials. Conversely, higher brightness also reduces the lifespan of the light-emitting materials, which in turn shortens the service life of the display substrate. To avoid the aforementioned problems, the control circuit in some embodiments of this disclosure is configured to control the first sub-anode via the first control circuit so that it is switched on, and, when a current flowing through the first sub-anode is greater than or equal to half the maximum current, to control the second sub-anode via the second control circuit so that it is switched on.

[0097] For example, different subpixels of the same color in the same pixel unit are controlled separately by the first control circuit 51 and the second control circuit 52. If, for instance, the current flowing through the first subanode 401 is greater than or equal to half the maximum current, this indicates that the light emission brightness corresponding to the first subpixel SP1 is increasing. In this case, the second subanode 402 can be controlled by the second control circuit 52 to be switched on, so that the second subpixel SP2 compensates for the light emission brightness of the first subpixel SP1. Simultaneously, if the light emission brightness in the pixel unit is low, one of the two subpixels of the same color can be switched off, thereby increasing the service life of the subpixel.

[0098] In other embodiments of the present disclosure, the control circuit 50 is configured to: in a first period, control the first partial anode 401 via the first control sub-circuit 51 so that it is switched on, and simultaneously control the second partial anode 402 via the second control sub-circuit 52 so that it is not switched on; and in a second period, control the first partial anode 401 via the first control sub-circuit 51 so that it is not switched on, and simultaneously control the second partial anode 402 via the second control sub-circuit 52 so that it is switched on.

[0099] This means that, at different time intervals, different subpixels of the same color within the same pixel unit are controlled so that they illuminate alternately. For example, if all subpixels of the same color are in low-brightness mode, in the first interval one of the subpixels is controlled to illuminate while the other is switched off. In the second interval, the other subpixel is controlled to illuminate while the first is switched off. This achieves the alternating illumination of subpixels of the same color and increases the lifespan of the pixels.

[0100] Fig. Figure 5 is a schematic structure diagram of the dimensions of a pixel unit of a display substrate according to an exemplary embodiment of the present disclosure.

[0101] As in Fig. Figure 5 shows the dimensional structure of a pixel unit. In this embodiment, this pixel unit is a square with a side length of 104.4 µm. Each pixel unit comprises four subpixels, including two blue subpixels, one red subpixel, and one green subpixel. The subpixel aperture of each subpixel is square and of the same size; that is, the orthographic projection of the subpixel aperture onto the base substrate is square, and the subpixel aperture is a square with a side length of 30.2 µm. A first distance D1 between adjacent side edges of neighboring subpixel apertures is 22 µm. Each subpixel aperture has a corresponding subpixel lens, and the diameter of the subpixel lens is 42.71 µm. The second distance D2 between the nearest points of neighboring subpixel lenses is 9.49 µm. With this pixel aperture design, the maximum pixel aperture ratio can be achieved.

[0102] 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 = 3648.16 µm². 2 The total area of ​​each pixel unit is 104.4 × 104.4 = 10899.36 µm² 2 Therefore, the pixel aperture ratio is 33.5%.

[0103] Fig. Figure 6 is a schematic structure diagram of the dimensions of a pixel unit of a display substrate according to another exemplary embodiment of the present disclosure.

[0104] As in Fig. Figure 6 shows the dimensional structure of another pixel unit. In this embodiment, this pixel unit is a square with a side length of 123 µm. Each pixel unit comprises four subpixels, including two blue subpixels, one red subpixel, and one green subpixel. The subpixel aperture of each subpixel is rectangular and of the same size; that is, the orthographic projection of the subpixel aperture onto the base substrate is a rectangle, and the side lengths of the rectangle are 40 µm in length and 30 µm in width. The first directional distance D11 of the adjacent side edges from the subpixel apertures adjacent in the first direction is 21.5 µm, and the second directional distance D12 of the adjacent side edges from the subpixel apertures adjacent in the second direction Y is 31.5 µm; that is, the second directional distance D12 is greater than the first directional distance D11.Each subpixel aperture has a corresponding subpixel lens, and the diameter of the subpixel lens is 50 µm. The second distance D2 between the nearest points of adjacent subpixel lenses is 11.5 µm. According to this pixel aperture design, the achievable pixel aperture ratio is 31.7%, meaning a larger aperture ratio can be achieved while ensuring good white balance.

[0105] The embodiments of the present disclosure further provide a method for producing a display substrate, wherein the display substrate has a display area, and wherein the method for producing the substrate comprises operations S101 to S103.

[0106] In process S101, a base substrate is provided.

[0107] In process S102, a plurality of pixel units are formed on one side of the base substrate, arranged in an array in the display area, each pixel unit comprising a plurality of subpixels, each subpixel comprising a subpixel aperture defined by a pixel definition layer arranged on the base substrate.

[0108] In process S103, a plurality of subpixel lenses are formed on a side of the pixel definition layer far from the base substrate, wherein the pixel definition layer has a corresponding subpixel aperture on a side of each subpixel lens close to the base substrate, wherein the plurality of subpixels encompassed in each pixel unit includes at least two subpixels of the same color, wherein an orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, an orthographic projection of the subpixel lens onto the base substrate is a circle, and the orthographic projection of each subpixel aperture onto the base substrate is within the orthographic projection of the corresponding subpixel lens onto the base substrate;wherein adjacent side edges of two adjacent subpixel apertures are arranged parallel, a first distance D1 exists between the adjacent side edges of the adjacent subpixel apertures, a second distance D2 exists between the nearest points of the adjacent subpixel lenses, the second distance D2 being smaller than the first distance D1.;

[0109] According to the embodiments of the present disclosure, the light output efficiency of the subpixels is increased by arranging a plurality of subpixel lenses on the side of the pixel definition layer furthest from the base substrate; furthermore, in the manufacturing process of the boundary pixel aperture, the maximum aperture ratio in each pixel unit can be achieved by providing at least two subpixels of the same color in the pixel unit and simultaneously arranging adjacent side edges of two adjacent subpixel apertures in parallel.Furthermore, the process of determining the boundary distance between adjacent subpixel lenses ensures the maximum aperture ratio in each pixel unit by having a circular orthographic projection of the subpixel lens onto the base substrate, providing at least two subpixels of the same color in each pixel unit, and simultaneously ensuring that the second distance D2 between the nearest points of adjacent subpixel lenses is greater than the first distance D1 between adjacent side edges of adjacent subpixel apertures. In this way, the light output efficiency of the display substrate can be increased while simultaneously meeting the requirement for high pixel density.

[0110] Fig. Figure 7 is a schematic structure diagram of a display device according to an exemplary embodiment of the present disclosure.

[0111] In some embodiments of the present disclosure and as in Fig. As shown in Figure 7, the embodiments of the present disclosure further provide a display device 200 which may comprise the display substrate 100 described above.

[0112] The advantageous effects that can be achieved by the display device in the above-mentioned embodiments of the present disclosure are the same as the advantageous effects that can be achieved by the above-mentioned display substrate and are not described in detail here.

[0113] The above display device can be any device that displays both text and images, regardless of whether the text or images are moving (e.g., videos) or stationary (e.g., still images). More specifically, it is expected that the embodiments can be implemented in or combined with multiple electronic devices, the multiple electronic devices being, for example (but not limited to), mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigation devices, cameras, MP4 video players, video cameras, game consoles, wristwatches, clocks, calculators, television monitors, flat panel displays, computer monitors, vehicle displays (e.g., odometer displays, etc.), navigation devices, cockpit controls and / or displays, displays of camera views (e.g.,Examples include reversing camera displays 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.

[0114] Taking into account factors such as process variations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., the limitations of the measuring system), 'about' or 'approximately', as used here, encompass the stated value and indicate that the specific value lies within a range of deviation acceptable to a person skilled in the art. For example, 'about' may mean within one or more standard deviations or within ±30%, ±20%, ±10%, or ±5% of the stated value. The terms 'essentially', 'about', 'approximately', 'about', and other similar terms used in this text are used as approximation terms and not as degrees, and they are intended to explain the inherent deviations from measured or calculated values ​​that would be recognized by a person skilled in the art.Taking into account factors such as process variations, measurement problems, and errors associated with the measurement of a given quantity (i.e., limitations of the measuring system), "approximately" or "about," as used here, includes the stated value and indicates that the stated value is within an acceptable range of deviation as determined by a person skilled in the art. For example, "approximately" may mean within one or more standard deviations or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0115] While some embodiments have been illustrated and described in accordance with the general technical concept of the present disclosure, a person skilled in the art will understand that modifications to these embodiments may be made without departing from the principles and spirit of the general technical concept, the scope of the present disclosure being limited by the claims and their equivalents.

Claims

[1] Display substrate with a display area, wherein the display substrate comprises: a base substrate; a large number of pixel units arranged in an array within the display area, wherein each pixel unit comprises a plurality of subpixels which encompass the subpixel apertures defined by a pixel definition layer arranged on the base substrate; a plurality of subpixel lenses arranged in an array on a side of the pixel definition layer far from the base substrate, wherein the pixel definition layer has corresponding subpixel apertures on a side of the subpixel lens close to the base substrate; wherein the plurality of subpixels encompassed in each pixel unit includes at least two subpixels of the same color, wherein an orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, an orthographic projection of the subpixel lens onto the base substrate is a circle, and the orthographic projection of the subpixel aperture onto the base substrate is located within the orthographic projection of the corresponding subpixel lens onto the base substrate; wherein adjacent side edges of two adjacent subpixel openings are arranged parallel and a first distance D1 exists between the adjacent side edges of the adjacent subpixel openings; where there is a second distance D2 between the nearest points of the adjacent subpixel lenses, and the second distance D2 is smaller than the first distance D1. [2] Display substrate according to claim 1, wherein the diameters of the orthographic projections of the plurality of subpixel lenses onto the base substrate are equal. [3] Display substrate according to claim 1, wherein an orthographic projection of the center point of the subpixel lens onto the base substrate coincides with an orthographic projection of the center point of the corresponding subpixel aperture onto the base substrate. [4] Display substrate according to any one of claims 1 to 3, wherein each pixel unit comprises two first color subpixels of the same color, a second color subpixel with a different color than the first color subpixel, and a third color subpixel with a different color than the first color subpixel and the second color subpixel; wherein a first subpixel lens corresponding to the first color subpixel has a first center point, a second subpixel lens, corresponding to the second color subpixel, has a second center point, a third subpixel lens, corresponding to the third color subpixel, has a third center point, where the first center point, the second center point and the third center point are connected one after the other to form a square. [5] Display substrate according to claim 4, wherein the subpixels comprising the plurality of pixel units are arranged at intervals in a first direction and in a second direction, where the first direction and the second direction intersect, where the first distance comprises D1: a first directional distance D11 between adjacent side edges of the subpixels adjacent in the first direction; and a second directional distance D12 between adjacent side edges of the subpixels adjacent in the second direction; where the second directional distance D12 is greater than or equal to the first directional distance D11. [6] Display substrate according to claim 4, wherein the first color subpixel comprises a first subpixel aperture, the second color subpixel comprises a second subpixel aperture and the third color subpixel comprises a third subpixel aperture, wherein an area S1 of the first subpixel aperture, an area S2 of the second subpixel aperture and an area S3 of the third subpixel aperture satisfy the following relationship: S1≥S2≥S3. [7] Display substrate according to claim 6, wherein an orthographic projection of the first subpixel aperture onto the base substrate is inscribed in an orthographic projection of the first subpixel lens onto the base substrate. [8] Display substrate according to claim 7, wherein an orthographic projection of the second subpixel aperture onto the base substrate is inscribed in an orthographic projection of the second subpixel lens onto the base substrate. [9] Display substrate according to claim 8, wherein an orthographic projection of the third subpixel aperture onto the base substrate is inscribed in an orthographic projection of the third subpixel lens onto the base substrate. [10] Display substrate according to claim 4, wherein the display substrate further comprises: an anode layer located between the pixel definition layer and the base substrate, wherein the orthographic projection of the subpixel aperture onto the base substrate is located within an orthographic projection of the anode layer onto the base substrate, the anode layer comprises: a first anode corresponding to the first color subpixel; a second anode corresponding to the second color subpixel; a third anode corresponding to the third color subpixel; the orthographic projections of the first anode, the second anode and the third anode onto the base substrate do not overlap. [11] Display substrate according to claim 10, wherein the orthographic projections of the subpixel openings of the first color subpixels of the same color in each pixel unit onto the base substrate are located within the orthographic projection of the same first anode onto the base substrate. [12] Display substrate according to claim 10, wherein the first anode comprises 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; wherein the orthographic projections of the first sub-anode and the second sub-anode onto the base substrate do not overlap. [13] Display substrate according to claim 12, wherein the display substrate further comprises a control circuit arranged between the anode layer and the base substrate, wherein the control circuit comprises a first control sub-circuit for controlling the on-state of the first partial anode and a second control sub-circuit for controlling the on-state of the second partial anode. [14] Display substrate according to claim 13, wherein the control circuit is configured to control the first partial anode via the first control sub-circuit such that the first partial anode is switched on, and, if a current flowing through the first partial anode is greater than or equal to half the maximum current, to control the second partial anode via the second control sub-circuit such that the second partial anode is switched on. [15] Display substrate according to claim 13, wherein the control circuit is configured for this purpose: In a first period, to control the first partial anode via the first control circuit so that the first partial anode is switched on, and simultaneously to control the second partial anode via the second control circuit so that the second partial anode is not switched on; and in a second period, to control the first partial anode via the first control circuit so that that the first partial anode is not switched on, and at the same time to control the second partial anode via the second control circuit so that the second partial anode is switched on. [16] Display substrate according to claim 6, wherein the first color subpixel comprises a blue subpixel, the second color subpixel comprises a green subpixel and the third color subpixel comprises a red subpixel; wherein the ratio of S2 / S3 is in the range of 1 to 2.

5. [17] Display substrate according to any one of claims 1 to 3, wherein the orthographic projection of the subpixel opening onto the base substrate is a square or a rectangle. [18] Display substrate according to any one of claims 1 to 3, wherein the orthographic projection of the subpixel aperture onto the base substrate has a first side edge located close to a neighboring subpixel aperture; the orthographic projection of the subpixel lens corresponding to the subpixel aperture onto the base substrate has a first arc edge located near an adjacent subpixel lens, wherein the first side edge and the first arc edge are on the same side of the orthographic projections, There is a maximum distance D3 between the first side edge and the first arc edge, which is smaller than the second distance D2. [19] Method for producing a display substrate, wherein the display substrate has a display area, the method for producing comprising: Providing a base substrate, Forming a plurality of pixel units on one side of the base substrate, arranged in an array in the display area, each pixel unit comprising a plurality of subpixels that encompass the subpixel apertures defined by a pixel definition layer arranged on the base substrate; Forming a plurality of subpixel lenses on a side of the pixel definition layer far from the base substrate, wherein the pixel definition layer has corresponding subpixel apertures on a side of the subpixel lens close to the base substrate; wherein the plurality of subpixels encompassed in each pixel unit includes at least two subpixels of the same color, wherein an orthographic projection of the subpixel aperture onto the base substrate is a parallelogram, an orthographic projection of the subpixel lens onto the base substrate is a circle, and the orthographic projection of the subpixel aperture onto the base substrate is located within the orthographic projection of the corresponding subpixel lens onto the base substrate; wherein adjacent side edges of two adjacent subpixel apertures are arranged parallel, a first distance D1 exists between the adjacent side edges of the adjacent subpixel apertures, and a second distance D2 exists between the nearest points of the adjacent subpixel lenses, wherein the second distance D2 is smaller than the first distance D1. [20] Display device comprising a display substrate according to any one of claims 1 to 18.

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