Display boards and display devices

Abstract

An embodiment of the present disclosure provides a display substrate and a display device, the display substrate including: a base; a pixel definition layer located on one side of the base, the pixel definition layer having a plurality of pixel openings emitting different colors, the pixel openings having orthogonal projections of the pixel openings on the base; and a black matrix located on a side of the pixel definition layer away from the base, the pixel openings including black matrix openings corresponding to the pixel openings, the black matrix openings having orthogonal projections of the black matrix openings on the base, the orthogonal projections of the black matrix openings covering the orthogonal projections of the corresponding pixel openings, the black matrix openings having an aperture flaring compared to the pixel openings, the flaring of the openings being inversely proportional to the length of the orthogonal projections of the pixel openings in the same direction parallel to the base at positions of the pixel openings of at least two different light emitting colors.

Description

[Technical Field]

[0001] This disclosure relates to the semiconductor technology field, and more particularly to display substrates and display devices. [Background technology]

[0002] Active-matrix organic light-emitting diodes (AMOLEDs) are one of the most promising display technologies today, offering advantages such as self-illumination (no backlight required), a simple structure, a wide viewing angle, low power consumption, and the ability to enable flexible displays. Recently, with the innovative development of larger and foldable organic light-emitting displays, the demand for low power consumption has increased in the display field, and the power consumption of EL can be effectively reduced by improving the transmittance of the upper layer components of the light-emitting layer. [Overview of the Initiative] [Means for solving the problem]

[0003] Embodiments of this disclosure provide a display substrate and a display device. The display substrate is Bass and, Located on one side of the base, having a plurality of pixel apertures that emit different colors, the pixel apertures form a pixel definition layer having an orthographic projection of the pixel apertures onto the base, The pixel definition layer includes a black matrix located on the side away from the base, which includes a black matrix opening corresponding to the pixel opening, the black matrix opening having an orthographic projection of the black matrix opening onto the base, the orthographic projection of the black matrix opening covering the orthographic projection of the corresponding pixel opening, the black matrix opening having an outward extension of the opening compared to the pixel opening, and at the positions of the pixel openings with at least two different light-emitting colors, in the same direction parallel to the base, the outward extension of the opening being inversely proportional to the length of the orthographic projection of the pixel opening.

[0004] In possible embodiments, the orthographic projection of the pixel aperture is polygonal, the pixel aperture includes a first pixel aperture that emits light of a first color, the first pixel aperture has a first side extending along a first direction, the length of the first side of the first pixel aperture is greater than or equal to the length of the remaining sides of the first pixel aperture, and greater than or equal to the maximum side length of the pixel aperture of the remaining emitted colors. At the locations of the pixel apertures with at least two different light-emitting colors, the outward extension of the aperture is inversely proportional to the orthographic length of the pixel aperture in a direction parallel to the base and perpendicular to the first direction.

[0005] In possible embodiments, at the locations of the pixel apertures with at least two different light-emitting colors, the outward extension of the apertures in the first direction parallel to the base is inversely proportional to the orthographic length of the pixel apertures.

[0006] In possible embodiments, the first pixel aperture is a red pixel aperture that emits red light, and the pixel aperture further includes a blue pixel aperture that emits blue light and a green pixel aperture that emits green light. One blue pixel aperture, one red pixel aperture, and one green pixel aperture are arranged sequentially along a direction perpendicular to the first direction to form a repeating unit, and a plurality of these repeating units are arranged sequentially along a direction perpendicular to the first direction to form a row of pixel apertures.

[0007] In possible embodiments, the first pixel aperture is a blue pixel aperture that emits blue light, and the pixel aperture further includes a red pixel aperture that emits red light and a green pixel aperture that emits green light. One of the red pixel openings, one of the green pixel openings, and one of the blue pixel openings form a repeating unit, and within the repeating unit, the red pixel openings and the green pixel openings are arranged along the first direction, and a straight line passing through the center of the blue pixel opening and perpendicular to the first direction is located in the gap between the red pixel opening and the green pixel opening, and a plurality of the repeating units are arranged sequentially along a direction perpendicular to the first direction to form a row of pixel openings.

[0008] In possible embodiments, the first pixel aperture is a blue pixel aperture that emits blue light, and the pixel aperture further includes a red pixel aperture that emits red light, and a first green pixel aperture and a second green pixel aperture that emit green light. One red pixel aperture, one first green pixel aperture, one second green pixel aperture, and one blue pixel aperture form a repeating unit, and within the repeating unit, the centers of the red pixel aperture, the blue pixel aperture, the first green pixel aperture, and the second green pixel aperture form a rectangle, two sides of the rectangle are parallel to the first direction, and the remaining two sides are perpendicular to the first direction, and the line connecting the center of the red pixel aperture and the center of the blue pixel aperture forms the first diagonal of the rectangle, and the repeating units are sequentially arranged along a direction parallel to the first diagonal to form a row of pixel apertures.

[0009] In possible embodiments, the projection of the pixel aperture on the base is circular, and the pixel aperture includes a blue pixel aperture that emits blue light, a red pixel aperture that emits red light, and a first green pixel aperture and a second green pixel aperture that emit green light. One of the red pixel apertures, one of the first green pixel apertures, one of the second green pixel apertures, and one of the blue pixel apertures form a repeating unit, and within the repeating unit, the centers of the red pixel aperture, the blue pixel aperture, the first green pixel aperture, and the second green pixel aperture form a rectangle, and the line connecting the center of the red pixel aperture and the center of the blue pixel aperture forms the first diagonal of the rectangle, and the repeating units are sequentially arranged along a direction parallel to the first diagonal to form a row of pixel apertures.

[0010] In possible embodiments, the ratio of the outward extension of the pixel apertures of at least two different light-emitting colors in the same direction parallel to the base is approximately inversely proportional to the ratio of the orthographic projection lengths of the pixel apertures of the corresponding light-emitting colors.

[0011] In possible embodiments, the outward expansion range of the opening is 2 nm to 10 nm.

[0012] In possible embodiments, the display substrate further includes a light-emitting portion located at the pixel aperture and a color filter layer located away from the pixel definition layer of the black matrix, wherein the color filter layer includes a color resist located at the black matrix aperture. The peak wavelength of the transmission spectrum of the color resist is blue-shifted relative to the peak wavelength of the emission spectrum of the corresponding light-emitting part.

[0013] In possible embodiments, the peak wavelength of the transmission spectrum of the color resist is blue-shifted by 10 nm to 15 nm relative to the peak wavelength of the emission spectrum of the corresponding light-emitting portion.

[0014] In possible embodiments, the length by which the peak wavelengths of the transmission spectra of different color resists blue-shift with respect to the peak wavelength of the emission spectrum of the corresponding light-emitting portion is approximately the same.

[0015] In a possible embodiment, the color resist includes a red color resist for filtering red light, a blue color resist for filtering blue light, and a green color resist for filtering green light. The green light intensity attenuation spectrum emitted through the green color resist lies between the red light intensity attenuation spectrum emitted through the red color resist and the blue light intensity attenuation spectrum emitted through the blue color resist.

[0016] In possible embodiments, the light-emitting portion includes an organic light-emitting layer.

[0017] In possible embodiments, the display substrate further includes a sealing layer located between the pixel definition layer and the black matrix, and a touch layer located between the sealing layer and the black matrix.

[0018] Embodiments of the present disclosure further provide a display device, which includes the display substrate according to the embodiments of the present disclosure.

Brief Description of the Drawings

[0019] [Figure 1] FIG. 1 is a comparative schematic diagram of the viewing angle deviation of OLED displays with POL structures and integrated COE structures. [Figure 2] FIG. 2 is a comparative schematic diagram of the viewing angle luminance attenuation of OLED displays with POL structures and integrated COE structures. [Figure 3] FIG. 3 is a comparative schematic diagram of specific parameters of the viewing angle characteristics of OLED displays with POL structures and integrated COE structures. [Figure 4] FIG. 4 is a cross-sectional schematic diagram of the display substrate according to the embodiments of the present disclosure. [Figure 5] FIG. 5 is a first schematic diagram of a pixel aperture and a black matrix aperture according to the embodiments of the present disclosure. [Figure 6] FIG. 6 is a second schematic diagram of a pixel aperture and a black matrix aperture according to the embodiments of the present disclosure. [Figure 7] FIG. 7 is a third schematic diagram of a pixel aperture and a black matrix aperture according to the embodiments of the present disclosure. [Figure 8] FIG. 8 is a fourth schematic diagram of a pixel aperture and a black matrix aperture according to the embodiments of the present disclosure. [Figure 9] FIG. 9 is a fifth schematic diagram of a pixel aperture and a black matrix aperture according to the embodiments of the present disclosure. [Figure 10] FIG. 10 is a first schematic diagram of arranging a pixel structure according to the embodiments of the present disclosure. [Figure 11] FIG. 11 is a schematic diagram of the arrangement of pixel structures in a repeating unit in FIG. 10. [Figure 12] FIG. 12 is a schematic diagram of the viewing angle luminance attenuation when arranging the pixel structure in FIG. 11. [Figure 13] FIG. 13 is a diagram showing the CIE locus of the W viewing angle when arranging the pixel structure in FIG. 11. [Figure 14] Figure 14 is a schematic diagram of the W field-viewing angle characteristic parameters when arranging the pixel structure shown in Figure 11. [Figure 15] Figure 15 is a schematic diagram of the arrangement of the repeating unit pixel structure in Figure 16. [Figure 16] Figure 16 is a second schematic diagram showing the arrangement of a pixel structure according to an embodiment of the present disclosure. [Figure 17] Figure 17 is a schematic diagram of the arrangement of the repeating unit pixel structure in Figure 18. [Figure 18] Figure 18 is a third schematic diagram showing the arrangement of a pixel structure according to an embodiment of the present disclosure. [Figure 19] Figure 19 is a schematic diagram of the arrangement of the repeating unit pixel structure in Figure 20. [Figure 20] Figure 20 is a fourth schematic diagram showing the arrangement of a pixel structure according to an embodiment of the present disclosure. [Figure 21] Figure 21 is a schematic simulation of the white light viewing angle luminance attenuation when the peak position of the transmission spectrum of a green color resist shifts from left to right. [Figure 22] Figure 22 shows the transmittance spectrum of a green color resist that changes with angle. [Figure 23] Figure 23 is a schematic diagram illustrating how the field emission spectrum changes with angle. [Figure 24] Figure 24 is a schematic diagram of the field emission spectrum and the transmission spectrum of the green color resist. [Figure 25] Figure 25 is a schematic diagram illustrating the matching of optical viewing angle luminance attenuation for three emitted colors: red, green, and blue. [Modes for carrying out the invention]

[0020] To further clarify the purpose, technical solutions, and advantages of the embodiments of this disclosure, the technical solutions of the embodiments of this disclosure will be described clearly and completely below with reference to the drawings of the embodiments of this disclosure. Clearly, the embodiments described are a part of the embodiments of this disclosure, but not all of them. All other embodiments obtained by a person skilled in the art without requiring any creative work based on the embodiments of this disclosure described are all within the scope of this disclosure.

[0021] Unless otherwise defined, technical or scientific terms used in this disclosure have the general meanings that are understandable to those skilled in the art. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, number, or importance, but are merely used to distinguish different components. Similar terms such as “includes” or “incorporates” mean that the element or component listed before the term includes the elements or components listed after the term, and their equivalents, but do not exclude other elements or components. Similar terms such as “connected” or “linked” may include electrical connections, whether directly or indirectly, and are not limited to physical or mechanical connections. “Up,” “down,” “left,” “right,” etc., are merely used to describe relative positions, and such relative positions may change accordingly if the absolute position of the subject changes.

[0022] In order to maintain clarity and conciseness in the following descriptions of the embodiments of this disclosure, detailed descriptions of known functions and known components are omitted in this disclosure.

[0023] Using a color filter on encapsulation (COE) + black matrix structure instead of a circular polarizing plate (POL) structure is an effective way to improve transmittance, while simultaneously enabling the creation of thinner display modules, which is also advantageous for the further development of foldable screens. However, introducing a COE structure to an organic electroluminescence display (OLED) display severely degrades the viewing angle characteristics. As shown in Figures 1, 2, and 3, Figure 1 is a schematic comparison of viewing angle color shift between OLED displays with POL structure and integrated COE structure, Figure 2 is a schematic comparison of viewing angle brightness attenuation between OLED displays with POL structure and integrated COE structure, and Figure 3 is a schematic comparison of specific parameters of the viewing angle characteristics between OLED displays with POL structure and integrated COE structure. As can be seen from Figures 1, 2, and 3, both the viewing angle color shift and viewing angle brightness attenuation worsen in OLED displays with integrated COE structure. There are two main reasons for this: one is the absorption and shielding effect of the black matrix (BM), and the other is the absorption of light by the color filter layer (CF).

[0024] In view of this, the embodiments of the present disclosure provide a display board, as shown in Figures 4 to 9, It includes base 1, pixel rendering layer 2, and black matrix 3. The pixel definition layer 2 is located on one side of the base 1 and has a plurality of pixel apertures 20 that emit different colors, and the pixel apertures 20 have an orthographic projection 200 of the pixel apertures on the base 1, specifically, for example, the pixel apertures 20 include a first pixel aperture 21, a second pixel aperture 22, and a third pixel aperture 23, and the emitted colors of the first pixel aperture 21, the second pixel aperture 22, and the third pixel aperture 23 are each different. The black matrix 3 is located on the side of the pixel definition layer 2 away from the base 1 and includes a black matrix aperture 30 corresponding to the pixel aperture 20. Specifically, for example, the black matrix aperture 30 includes a first black matrix aperture 31 corresponding to the first pixel aperture 20, a second black matrix aperture 32 corresponding to the second pixel aperture 22, and a third black matrix aperture 33 corresponding to the third pixel aperture 23. The black matrix aperture 30 has an orthographic projection 300 of the black matrix aperture on the base 1. The black matrix aperture 30 has an outward extension of the aperture compared to the pixel aperture 20, that is, the size of the black matrix aperture 30 is larger and the black matrix aperture 30 extends outward relative to the pixel aperture 20. Specifically, the outward extension of the aperture can be understood as the difference between the position of the smallest aperture of the black matrix aperture 30 and the smallest position of the pixel aperture 20. For example, as shown in Figure 4, the cross-section of the black matrix aperture 20 is a trapezoid where the upper opening is larger than the lower opening, and the pixel aperture 20 The cross-section is a trapezoid where the upper opening is larger than the lower opening, and the outward spread of the opening may be the lower opening of the black matrix 30 and the lower opening of the pixel opening 20, and at the positions of at least two pixel openings 20 with different light-emitting colors, in the same direction parallel to the base 1, the outward spread of the opening is inversely proportional to the length of the orthographic projection 200 of the pixel opening, specifically, for example, at the position of the first pixel opening 21, in the direction indicated by arrow AB in Figure 5, the opening of the first black matrix opening 31 and the opening of the first pixel opening 21 The outward spread of the first black matrix aperture 31 is a12 (as shown in Figures 6 and 7, a12 is half the difference between the length a13 of the first black matrix aperture 31 and the length a11 of the first pixel aperture 21), and the outward spread of the aperture is inversely proportional to the length a11 of the first pixel aperture 21. In other words, the longer the length of the first pixel aperture 21, the smaller the outward spread of the aperture at the position of the first pixel aperture 21 can be set, that is, the amount of outward spread of the first black matrix aperture 31 relative to the first pixel aperture 21 can be set to be small.

[0025] In the embodiments of this disclosure, at the position of the pixel aperture 20, in the same direction parallel to the base 1, the outward spread of the aperture is made inversely proportional to the length of the orthographic projection 200 of the pixel aperture. As a result, the larger the size of the pixel aperture 20, the smaller the outward spread of the first black matrix aperture 31 relative to the first pixel aperture 21, and the smaller the size of the pixel aperture 20, the larger the outward spread of the first black matrix aperture 31 relative to the first pixel aperture 21. Furthermore, for pixel apertures with different emitted colors and different aperture sizes, the luminance attenuation of pixel apertures with different emitted colors can be made nearly balanced. This avoids the problem of viewing angle color shift and poor viewing angle luminance attenuation at large viewing angles in the final display because the degree to which the viewing angle luminance attenuation of different colors is affected by the black matrix aperture does not match (the smaller the size of the pixel aperture, the greater the degree of viewing angle luminance attenuation).

[0026] In possible embodiments, the orthographic projection of the pixel aperture 20 is polygonal, the pixel aperture 20 includes a first pixel aperture 21 that emits light of a first color, the first pixel aperture 21 has a first side extending along a first direction AB, the length of the first side of the first pixel aperture 21 is greater than or equal to the length of the remaining sides of the first pixel aperture 21 and greater than or equal to the length of the maximum side of the remaining emitting color pixel apertures, i.e., the first pixel aperture 21 is the pixel aperture 20 including the maximum side length, and the first side is the maximum side of the first pixel aperture 21, the first direction AB is the direction in which the first side is located, and at the location of at least two different emitting color pixel apertures 20, the outward extension of the aperture in a direction parallel to the base 1 and perpendicular to the first direction AB (the direction indicated by arrow CD in Figure 5) is inversely proportional to the length of the orthographic projection of the pixel aperture 20. Specifically, for example, as shown in Figure 5, at the position of the first pixel aperture 21, in a direction parallel to the base 1 and perpendicular to the first direction (indicated by arrow CD in Figure 5), the outward spread of the apertures of the first black matrix aperture 31 and the first pixel aperture 21 is a22 (as shown in Figures 8 and 9, a22 is half the difference between the length a23 of the first black matrix aperture 31 and the length a21 of the first pixel aperture 21), and the outward spread a22 of the aperture is inversely proportional to the length a21 of the first pixel aperture 21. In the embodiments of this disclosure, at the positions of at least two pixel apertures 20 with different light-emitting colors, in a direction parallel to the base 1 and perpendicular to the first direction (indicated by arrow CD in Figure 5), the outward spread of the aperture is inversely proportional to the length of the orthographic projection 200 of the pixel aperture, and the problem of worsening viewing angle color shift and viewing angle brightness attenuation in the direction perpendicular to the first direction AB can be improved.

[0027] In possible embodiments, at the locations of at least two pixel apertures 20 with different light-emitting colors, the outward expansion of the aperture in a first direction AB parallel to the base 1 is inversely proportional to the length of the orthographic projection 200 of the pixel aperture. Specifically, in embodiments of the present disclosure, the outward expansion of the aperture in the direction where the longest side of the pixel aperture 20 of the black matrix aperture 30 is located is inversely proportional to the length of the orthographic projection of the pixel aperture 20, thereby improving the problems of poor viewing angle color shift and viewing angle luminance attenuation in the first direction AB.

[0028] In possible embodiments, the ratio of the outward expansion of at least two pixel apertures of different light-emitting colors in the same direction parallel to the base 1 is approximately inversely proportional to the ratio of the orthographic projection lengths of the corresponding light-emitting pixel apertures. Specifically, for example, if the ratio of the orthographic projection length of a red light-emitting pixel aperture to the orthographic projection length of a green light-emitting pixel aperture in the same direction parallel to the base 1 is a:b, then the ratio of the outward expansion of the red light-emitting pixel aperture to the outward expansion of the green light-emitting pixel aperture is b:a. In embodiments of this disclosure, the ratio of the outward expansion of at least two pixel apertures of different light-emitting colors in the same direction parallel to the base 1 is approximately inversely proportional to the ratio of the orthographic projection lengths of the corresponding light-emitting pixel apertures, thereby approximately balancing the luminance attenuation of at least two pixel apertures of different light-emitting colors and avoiding the problem of viewing angle color shift and poor viewing angle luminance attenuation at large viewing angles during display.

[0029] In a possible embodiment, in the same direction parallel to the base 1, the ratio of the outer spread of the openings of different pixel openings for each light-emitting color is approximately inversely proportional to the length ratio of the orthographic projections of the pixel openings of the corresponding light-emitting color. Specifically, for example, in the same direction parallel to the base 1, the length of the orthographic projection of the pixel opening that emits red light is a, the length of the orthographic projection of the pixel opening that emits green light is b, and the length of the orthographic projection of the pixel opening that emits blue light is c. Taking the outer spread of the opening corresponding to the largest one among the orthographic projections of the pixel openings as 1, and a < b < c, that is, when the outer spread of the opening that emits blue light is 1, the outer spread y of the opening that emits red light is c / a (that is, a:c = 1:y), and similarly, the outer spread x of the opening that emits green light is c / b (that is, b:c = 1:x). The ratio of the outer spread y of the opening of the pixel opening that emits red light: the outer spread x of the opening of the pixel opening that emits green light: the outer spread 1 of the opening of the pixel opening that emits green light is y:x:1 = c / a:c / b:1. Specifically, for example, in the first direction AB, the length of the orthographic projection of the pixel opening that emits red light is 15.4μm, the length of the orthographic projection of the pixel opening that emits green light is 18.55μm, and the length of the orthographic projection of the pixel opening that emits blue light is 34μm. When the three ratios are approximately 1:1.2:2.2, the outer spread of the opening of the pixel opening that emits red light: the outer spread of the opening of the pixel opening that emits green light: the outer spread of the opening of the pixel opening that emits blue light is 2.2:1.8:1. In the embodiments of the present disclosure, in the same direction parallel to the base 1, the ratio of the outer spread of the openings of different pixel openings for each light-emitting color is approximately inversely proportional to the length ratio of the orthographic projections of the pixel openings of the corresponding light-emitting color, which can substantially balance the luminance attenuation of the pixel openings that emit red light, green light, and blue light, and avoid the problems of the presence of a viewing angle shift and poor viewing angle luminance attenuation in a large viewing angle.

[0030] In order to more clearly understand the installation of the black matrix openings of the display substrate according to the embodiments of the present disclosure, the following will be described with examples.

[0031] For example, as shown in Figures 10 and 11, the first pixel aperture 21 is a red pixel aperture that emits red light, and the pixel aperture further includes a blue pixel aperture that emits blue light and a green pixel aperture that emits green light, specifically the green pixel aperture includes two sub-green pixel apertures, specifically, for example the second pixel aperture 22 is a green pixel aperture that emits green light, and the third pixel aperture 23 is a blue pixel aperture that emits blue light, and the blue pixel aperture (i.e., the third pixel aperture 23), the red pixel aperture (i.e., the first pixel aperture 21), and the green pixel aperture (i.e., the second pixel aperture 22) are arranged sequentially along a direction perpendicular to the first direction (i.e., the direction indicated by arrow CD) to form a repeating unit Z, and multiple repeating units Z are arranged sequentially along a direction perpendicular to the first direction (i.e., the direction indicated by arrow CD) to form a row of pixel apertures.

[0032] In the pixel arrangement shown in Figures 10 and 11, for example, in the direction perpendicular to the first direction AB (indicated by arrow CD), the widths a21 of the red pixel aperture (i.e., the first pixel aperture 21), b21 of the green pixel aperture (i.e., the second pixel aperture 22), and c21 of the blue pixel aperture (i.e., the third pixel aperture 23) are 10.2 μm, 22.6 μm, and 25 μm, respectively, with a ratio of approximately 1:2.2:2.5. If the ratio of the outward spread a22 of the red pixel aperture (i.e., the first pixel aperture 21), b22 of the green pixel aperture (i.e., the second pixel aperture 22), and c22 of the blue pixel aperture (i.e., the third pixel aperture 23) is designed to be 2.5:1:1, then different The degree to which the viewing angle luminance attenuation of colors is affected by the black matrix aperture 30 is almost the same. In the first direction AB, the widths a11 of the red pixel aperture (i.e., the first pixel aperture 21), b11 of the green pixel aperture (i.e., the second pixel aperture 22), and c11 of the blue pixel aperture (i.e., the third pixel aperture 23) are 51.19 μm, 47.65 μm, and 42.64 μm, respectively. The size of each pixel aperture 20 is large and close to 1:1:1, allowing for the outward extension of the same aperture to be designed. As needs to be explained, the two sub-pixel apertures of the green pixel aperture correspond to one black matrix aperture (i.e., there is no black matrix in the intermediate position between the two sub-green pixel apertures).

[0033] As a result of the above matching, as shown in Figure 11, in the direction perpendicular to the first direction AB (indicated by arrow CD), the outward spread a22 of the red pixel aperture (i.e., the first pixel aperture 21), the outward spread b22 of the green pixel aperture (i.e., the second pixel aperture 22), and the outward spread c22 of the blue pixel aperture (i.e., the third pixel aperture 23) are designed to be 5 μm, 2 μm, and 2 μm, respectively, and in the first direction AB, the outward spread a12 of the red pixel aperture (i.e., the first pixel aperture 21), the outward spread b12 of the green pixel aperture (i.e., the second pixel aperture 22), and the outward spread c12 of the blue pixel aperture (i.e., the third pixel aperture 23) are designed to be 2 μm, 2 μm, and 2 μm, respectively. The matching of viewing angle luminance attenuation for the red pixel aperture (i.e., the first pixel aperture 21), the green pixel aperture (i.e., the second pixel aperture 22), and the blue pixel aperture (i.e., the third pixel aperture 23) is shown in Figure 12, the CIE trajectory diagram for the W viewing angle is shown in Figure 13, and the W viewing angle characteristic parameters are shown in Figure 14. As can be seen from Figures 12, 13, and 14, the above matching design clearly improved the viewing angle color shift of the integrated COE structure OLED screen. The viewing angle color shifts at 30°, 45°, and 60° were reduced to 2JNCD, 1.8JNCD, and 2JNCD, respectively, approaching that of the POL structure OLED screen, and the viewing angle color shift at the large viewing angle of 60° was lower than that of the POL structure OLED screen. At the same time, the viewing angle luminance attenuation was also clearly improved. The viewing angle luminance attenuation at 30° was not affected by the COE structure, and the degree to which the viewing angle luminance attenuation at 45° and 60° was affected by the COE structure was reduced.

[0034] Furthermore, as shown in Figures 15 and 16, for example, the first pixel aperture 21 is a blue pixel aperture that emits blue light, and the pixel aperture 20 further includes a red pixel aperture that emits red light and a green pixel aperture that emits green light. Specifically, for example, the second pixel aperture 22 is a red pixel aperture that emits red light, and the third pixel aperture 23 is a green pixel aperture that emits green light. One red pixel aperture (second pixel aperture 22), one green pixel aperture (third pixel aperture 23), and one blue pixel aperture (first pixel aperture 21) form a repeating unit Z, and within the repeating unit Z, the red pixel The aperture (second pixel aperture 22) and the green pixel aperture (third pixel aperture 23) are arranged along the first direction AB, and a straight line k1 perpendicular to the first direction passes through the center of the blue pixel aperture (first pixel aperture 21) and is located in the gap between the red pixel aperture (second pixel aperture 22) and the green pixel aperture (third pixel aperture 23). Specifically, the red pixel aperture (second pixel aperture 22) and the green pixel aperture (third pixel aperture 23) may be symmetrical with respect to the line k1, and a plurality of repeating units Z are arranged sequentially along a direction perpendicular to the first direction AB (i.e., the direction indicated by arrow CD) to form rows of pixel apertures.

[0035] In the pixel arrangement shown in Figures 15 and 16, for example, in the direction perpendicular to the first direction AB (indicated by arrow CD), the widths b21 of the red pixel aperture (i.e., the second pixel aperture 22), c21 of the green pixel aperture (i.e., the third pixel aperture 23), and a21 of the blue pixel aperture (i.e., the first pixel aperture 21) are 18.7 μm, 18.7 μm, and 15.3 μm, respectively, with a ratio of approximately 1.2:1.2:1. If the ratio of the outward spread of the red pixel aperture (i.e., the second pixel aperture 22) b22, the outward spread of the green pixel aperture (i.e., the third pixel aperture 23) c22, and the outward spread of the blue pixel aperture (i.e., the first pixel aperture 21) a22 is designed to be 1:1:1.2, the degree to which the viewing angle brightness attenuation of different colors is affected by the black matrix aperture is almost the same.

[0036] In the first direction AB, the widths b11 of the red pixel aperture (i.e., the second pixel aperture 22), c11 of the green pixel aperture (i.e., the third pixel aperture 23), and a11 of the blue pixel aperture (i.e., the first pixel aperture 21) are 15.45 μm, 18.55 μm, and 34 μm, respectively, with a ratio of approximately 1:1.2:2.2. The ratio of the outward spread of the red pixel aperture (i.e., the second pixel aperture 22) b12, the outward spread of the green pixel aperture (i.e., the third pixel aperture 23) c12, and the outward spread of the blue pixel aperture (i.e., the first pixel aperture 21) a12 is designed to be 2.2:1.8:1.

[0037] As a result of the above matching, as shown in Figure 15, in the direction perpendicular to the first direction AB (indicated by arrow CD), the outward spread b22 of the red pixel aperture (i.e., the second pixel aperture 22), the outward spread c22 of the green pixel aperture (i.e., the third pixel aperture 23), and the outward spread a22 of the blue pixel aperture (i.e., the first pixel aperture 21) are 2 μm, 2 μm, and 2.4 μm, respectively, and in the first direction AB, the outward spread b12 of the red pixel aperture (i.e., the second pixel aperture 22), the outward spread c12 of the green pixel aperture (i.e., the third pixel aperture 23), and the outward spread a12 of the blue pixel aperture (i.e., the first pixel aperture 21) are 5.2 μm, 4.2 μm, and 2.4 μm, respectively.

[0038] Furthermore, as shown in Figures 17 and 18, for example, the first pixel aperture 21 is a blue pixel aperture that emits blue light, and the pixel aperture 20 further includes a red pixel aperture that emits red light, and a first green pixel aperture and a second green pixel aperture that emit green light. Specifically, for example, the second pixel aperture 22 is a red pixel aperture that emits red light, and the third pixel aperture 23 includes a first green pixel aperture and a second green pixel aperture 232 that emit green light, and one red pixel aperture (second pixel aperture 22), one first green pixel aperture 231, one second green pixel aperture 232, and one blue pixel aperture (first pixel aperture The part 21) forms a repeating unit Z, and within the repeating unit Z, the centers of the red pixel aperture (second pixel aperture 22), the blue pixel aperture (first pixel aperture 21), the first green pixel aperture 231, and the second green pixel aperture 232 form a quadrilateral, two sides of the quadrilateral are parallel to the first direction AB, and the remaining two sides are perpendicular to the first direction AB, and the line connecting the center of the red pixel aperture (second pixel aperture 22) and the center of the blue pixel aperture (first pixel aperture 21) forms the first diagonal k2 of the quadrilateral, and the repeating unit Z is sequentially arranged along the direction parallel to the first diagonal k2, forming a row of pixel apertures.

[0039] In the pixel arrangement shown in Figures 17 and 18, the blue pixel aperture (first pixel aperture 21) has the side with the longest side length, and if the direction in which the longest side of the blue pixel aperture (first pixel aperture 21) is located is defined as the first direction, then in the direction perpendicular to the first direction AB (indicated by arrow CD), the pixel width b21 of the red pixel aperture (second pixel aperture 22), the pixel width c21 of the first green pixel aperture 231, the pixel width c24 of the second green pixel aperture 232, and The pixel widths a21 of the blue pixel aperture (first pixel aperture 21) are 20.2 μm, 19.35 μm, 27.1 μm, and 12.13 μm, respectively, with a ratio of approximately 1:1:1.4:0.6. The outward spread of the red pixel aperture (second pixel aperture 22) is b22, the outward spread of the first green pixel aperture 231 is c22, the outward spread of the second green pixel aperture 232 is c24, and the outward spread of the blue pixel aperture (first pixel aperture 21) is When the outward spreading ratio a22 is designed to be 1.4:1.4:1:2.2, the degree to which the viewing angle brightness attenuation of different colors is affected by the black matrix aperture is almost the same, and in the first direction AB, the pixel width b11 of the red pixel aperture (second pixel aperture 22), the pixel width c11 of the first green pixel aperture 231, the pixel width c14 of the second green pixel aperture 232, and the pixel width a11 of the blue pixel aperture (first pixel aperture 21) are each 20.2 The apertures are μm, 12.13 μm, 27.1 μm, and 19.35 μm, with a ratio of approximately 1:0.6:2.2:1. The ratio of the outward spread of the red pixel aperture (second pixel aperture 22) b12, the outward spread of the first green pixel aperture 231 c12, the outward spread of the second green pixel aperture 232 c14, and the outward spread of the blue pixel aperture (first pixel aperture 21) a12 is designed to be 1.4:2.2:1:1.4.

[0040] Based on the above matching, in the direction perpendicular to the first direction AB (indicated by arrow CD), the outward spread b22 of the red pixel aperture (second pixel aperture 22), the outward spread c22 of the first green pixel aperture 231, the outward spread c24 of the second green pixel aperture 232, and the outward spread a22 of the blue pixel aperture (first pixel aperture 21) are 2.8 μm, 2.8 μm, 2 μm, and 4.4 μm, respectively. In the first direction AB, the opening of the red pixel aperture (second pixel aperture 22) The outward spread b12, the outward spread c12 of the first green pixel aperture 231, the outward spread c14 of the second green pixel aperture 232, and the outward spread a12 of the blue pixel aperture (first pixel aperture 21) are designed to be 2.8 μm, 4.4 μm, 2 μm, and 2.8 μm, respectively. Since the sizes of the first green pixel aperture 231 and the second green pixel aperture 232 differ in the first direction AB and the direction perpendicular to the first direction AB, they must be designed based on the size of the pixel aperture.

[0041] Furthermore, as shown in Figures 19 and 20, for example, the projection of the pixel aperture 20 on the base 1 is circular, and the pixel aperture 20 includes a blue pixel aperture that emits blue light, a red pixel aperture that emits red light, and a first green pixel aperture and a second green pixel aperture that emit green light. Specifically, for example, the first pixel aperture 21 is a blue pixel aperture that emits blue light, the second pixel aperture 22 is a red pixel aperture that emits red light, and the third pixel aperture 23 includes a first green pixel aperture 231 and a second green pixel aperture 232 that emit green light, one red pixel aperture (second pixel aperture 22), one first green pixel The primary aperture 231, one second green pixel aperture 232, and one blue pixel aperture (first pixel aperture 21) form a repeating unit Z, and within the repeating unit Z, the centers of the red pixel aperture (second pixel aperture 22), the blue pixel aperture (first pixel aperture 21), the first green pixel aperture 231, and the second green pixel aperture 232 form a rectangle, and the line connecting the center of the red pixel aperture (second pixel aperture 22) and the center of the blue pixel aperture (first pixel aperture 21) forms the second diagonal k3 of the rectangle, and the repeating unit Z is sequentially arranged along a direction parallel to the second diagonal k3, forming rows of pixel apertures.

[0042] In the pixel arrangement shown in Figures 19 and 20, the shapes of the red pixel aperture (second pixel aperture 22), the first green pixel aperture 231, the second green pixel aperture 232, and the blue pixel aperture (first pixel aperture 21) are all circular, with diameters of 20 μm, 15 μm, 15 μm, and 20 μm, respectively, and a ratio of 1:0.75:0.75:1. When the ratio of the outward spread of the red pixel aperture (second pixel aperture 22) b12, the outward spread of the first green pixel aperture 231 c12, the outward spread of the second green pixel aperture 232 c14, and the outward spread of the blue pixel aperture (first pixel aperture 21) a12 is designed to be 1:1.3:1.3:1, the degree to which the viewing angle brightness attenuation of different colors is affected by the black matrix aperture is almost the same, and because the shape of this pixel structure is circular, the ratio of the outward spread of the aperture in each direction is designed to be the same.

[0043] Based on the above matching, the outward spread b12 of the red pixel aperture (second pixel aperture 22), the outward spread c12 of the first green pixel aperture 231, the outward spread c14 of the second green pixel aperture 232, and the outward spread a12 of the blue pixel aperture (first pixel aperture 21) are 2 μm, 2.6 μm, 2.6 μm, and 2 μm, respectively.

[0044] In possible embodiments, as shown in Figure 5, the outward extension of the aperture ranges from 2 nm to 10 nm. In embodiments of this disclosure, process limitations necessitate that the outward extension of the aperture be greater than 2 nm and less than 10 nm, thereby avoiding the pixel definition layer between two pixels being too small to result in the absence of a black matrix.

[0045] In possible embodiments, as shown in Figure 4, the display substrate further includes a light-emitting section 4 located at the pixel aperture 20 and a color filter layer located away from the pixel definition layer 2 of the black matrix 3, the color filter layer including a color resist 5 located at the black matrix aperture 30, specifically, the light-emitting section 4 may include a first light-emitting section 41 located at the first pixel aperture 21, a second light-emitting section 42 located at the second pixel aperture 22, and a third light-emitting section 43 located at the third pixel aperture 23, the color resist 5 includes a first color resist 51 located at the first black matrix aperture 31, a second color resist 52 located at the second black matrix aperture 32, and The color resist 5 includes a third color resist 53 located at the black matrix aperture 33, wherein the peak wavelength of the transmission spectrum of the color resist 5 is blue-shifted relative to the peak wavelength of the emission spectrum of the corresponding light-emitting part 4. Specifically, for example, the peak wavelength of the transmission spectrum of the first color resist 51 is blue-shifted relative to the peak wavelength of the emission spectrum of the corresponding first light-emitting part 41, the peak wavelength of the transmission spectrum of the second color resist 52 is blue-shifted relative to the peak wavelength of the emission spectrum of the corresponding second light-emitting part 42, and the peak wavelength of the transmission spectrum of the third color resist 53 is blue-shifted relative to the peak wavelength of the emission spectrum of the corresponding third light-emitting part 43. Specifically, the peak wavelength of the transmission spectrum of the color resist 5 is blue-shifted by 10 nm to 15 nm relative to the peak wavelength of the emission spectrum of the corresponding light-emitting part 4.In the embodiments of this disclosure, as shown in Figure 21, the simulation results of white light viewing angle brightness attenuation are shown when the peak position of the CF transmission spectrum of the green pixel aperture (for example, the green pixel aperture is the third pixel aperture 23) shifts from side to side. In the figure, CF p-0 indicates that the peak position of the spectrum of the light-emitting unit 5 that emits green light coincides with the peak position of the transmission spectrum of the corresponding green color resist, CF p-10 indicates that the peak of the transmission spectrum of the green color resist is blue-shifted by 10 nm relative to the peak of the emission spectrum of the light-emitting unit 5 that emits green light, and CF p+10 indicates that the peak of the transmission spectrum of the green color resist is red-shifted by 10 nm relative to the peak of the emission spectrum of the light-emitting unit 5 that emits green light. As can be seen from the simulation results, the peak wavelength of the transmission spectrum of the color resist 5 is blue-shifted relative to the peak wavelength of the emission spectrum of the corresponding light-emitting unit 4, and the effect of viewing angle brightness attenuation by the color resist 5 can be significantly reduced. As needs to be explained, only the green color resist is described here as an example, but such adjustments can also be applied to red color resists and blue color resists.

[0046] In possible embodiments, the color filter layer may be located on the side of the black matrix 3 that faces the pixel definition layer 2.

[0047] Adjusting the blue shift of the peak wavelength of the emission spectrum of the light-emitting part 4 relative to the peak wavelength of the transmission spectrum of the color resist 5 can improve the principle of viewing angle brightness attenuation by the color resist 5, which will be explained further below.

[0048] The formula for absorbance is A = lg(I0 / I) = kcL (1), where I0 is the incident light intensity, I is the transmitted light intensity, k is the absorption coefficient, c is the solution concentration when forming the color filter, and L is the optical path. Based on the absorbance formula (1), we can obtain lgT = lg(I / I0) = -kcL (2), and thus the relationship between transmittance and the thickness of the color filter film is T = T0 (L / L0)(3) can be converted, and the optical path L through which light rays pass through the color filter film at the viewing angle θ =L0 / cosθ(4), and based on equations (3) and (4), the transmittance T at the viewing angle θ =T0 (1 / cosθ) (5) can be obtained. Fig. 22 is a diagram showing the transmittance spectrum of the green color resist changing with the angle. As can be seen from Fig. 22, at a large angle, the transmittance spectrum decreases sharply, and the attenuation of the transmittance spectrum becomes faster.

[0049] Based on the electroluminescent device, the spectrum enhanced by the microresonator is called the EL spectrum, the material intrinsic spectrum is called the PL spectrum, and the relationship between the two is EL(λ)=PL(λ)G cav (λ)(6), and the microresonator gain G cav (λ) is as follows,

Number

[0050] As shown in Fig. 23, the microresonator gain G cav (λ) undergoes a blue shift as the angle increases, and the relational expression between the peak position and the angle is

Number

[0051] EL spectrum peak λ m At a normal viewing angle (i.e., 0°), the EL spectrum is redshifted by more than 10 nm from the peak of the CF transmission spectrum. As shown in the positional relationship in Figure 24, at large viewing angles, the EL spectrum moves in the direction that improves CF transmittance (i.e., to the left in Figure 24). Since the position where CF transmittance is maximum and the position where the EL spectrum is maximum overlap, the overall transmittance is improved. This reduces the decrease in transmittance caused by the increase in the optical path at different viewing angles, thereby achieving the objective of slowing down luminance attenuation.

[0052] In possible embodiments, the length of the blue shift between the peak wavelengths of the transmission spectra of different color resists 5 and the peak wavelengths of the emission spectra of the corresponding light-emitting parts 4 is approximately the same. Specifically, the length of the blue shift between the peak wavelengths of the transmission spectra of different color resists 5 and the peak wavelengths of the emission spectra of the corresponding light-emitting parts 4 is approximately the same, and it can be understood that the length of the blue shift between the peak wavelengths of the transmission spectra of different color resists and the peak wavelengths of the emission spectra of the corresponding light-emitting parts 4 does not exceed 5 nm.

[0053] In possible embodiments, as shown in Figure 4, the color resist 4 includes a red color resist for filtering red light, a blue color resist for filtering blue light, and a green color resist for filtering green light. Specifically, for example, the first color resist 41 is a red color resist, the second color resist 42 is a green color resist, and the third color resist 43 is a blue color resist. As shown in Figure 25, the green light intensity attenuation spectrum emitted through the green color resist 41 (

number

number

number

[0054] In possible embodiments, the light-emitting section 5 includes an organic light-emitting layer. Specifically, the light-emitting section 5 may include one or more of the following components located in the order of base 1: anode, hole injection layer, hole transport layer, organic light-emitting layer, electron transport layer, electron injection layer, and cathode.

[0055] In possible embodiments, as shown in Figure 4, the display substrate further includes a sealing layer 6 located between the pixel definition layer 2 and the black matrix 3, and a touch layer 7 located between the sealing layer 6 and the black matrix 3. Specifically, a coating layer 81 may be further provided on the side of the color filter layer 5 away from the pixel definition layer 2, an optical adhesive layer 82 may be further provided on the side of the coating layer 81 away from the color filter layer 5, and a cover film 9 may be further provided on the side of the optical adhesive layer 82 away from the coating layer 81. The coating layer 81 may specifically be an organic coating layer 81, and is used to planarize the surface of the color filter layer 5 on the side away from the pixel definition layer 2. Specifically, the sealing layer 6 is a thin-film sealing layer and may include a stacked first inorganic sealing layer, an organic sealing layer, and a second inorganic sealing layer.

[0056] Based on the same inventive concept, embodiments of the present disclosure further provide a display device, including a display substrate according to embodiments of the present disclosure.

[0057] In the embodiments of this disclosure, at the position of the pixel aperture 20, in the same direction parallel to the base 1, the outward spread of the aperture is made inversely proportional to the length of the orthographic projection 200 of the pixel aperture. As a result, the larger the size of the pixel aperture 20, the smaller the outward spread of the first black matrix aperture 31 relative to the first pixel aperture 21, and the smaller the size of the pixel aperture 20, the larger the outward spread of the first black matrix aperture 31 relative to the first pixel aperture 21. Furthermore, for pixel apertures with different emitted colors and different aperture sizes, the luminance attenuation of pixel apertures with different emitted colors can be made nearly balanced. This avoids the problem of viewing angle color shift and poor viewing angle luminance attenuation at large viewing angles in the final display because the degree to which the viewing angle luminance attenuation of different colors is affected by the black matrix aperture does not match (the smaller the size of the pixel aperture, the greater the degree of viewing angle luminance attenuation).

[0058] While preferred embodiments of the present invention have been described, those skilled in the art, with an understanding of the basic inventive concept, can make additional changes and modifications to these embodiments. Accordingly, the appended claims are intended to be interpreted as encompassing all changes and modifications that fall within the scope of the preferred embodiments and the present invention.

[0059] Clearly, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments. Accordingly, the present invention is also intended to include such changes and modifications if these modifications and modifications to the embodiments of the present invention fall within the scope of the claims of the present invention and the equivalent art thereto.

Claims

1. A display board, Bass and, Located on one side of the base, having a plurality of pixel apertures that emit different colors, the pixel apertures form a pixel definition layer having an orthographic projection of the pixel apertures onto the base, A black matrix is ​​located on the side of the pixel definition layer away from the base and includes a black matrix opening corresponding to the pixel opening, the black matrix opening having an orthographic projection of the black matrix opening onto the base, the orthographic projection of the black matrix opening covering the orthographic projection of the corresponding pixel opening, the black matrix opening having an outward extension of the opening compared to the pixel opening, and at the positions of at least two pixel openings with different light-emitting colors, in the same direction parallel to the base, the outward extension of the opening is inversely proportional to the length of the orthographic projection of the pixel opening, The aforementioned pixel aperture includes a first pixel aperture that emits light of a first color, a second pixel aperture that emits light of a second color, and a third pixel aperture that emits light of a third color, wherein the first color, the second color, and the third color are different colors. A display substrate in which, in the same direction parallel to the base, the ratio of the outward expansion of the first pixel aperture, the second pixel aperture, and the third pixel aperture is inversely proportional to the ratio of the orthographic lengths of the first pixel aperture, the second pixel aperture, and the third pixel aperture.

2. The orthographic projection of the pixel aperture is polygonal, the first pixel aperture has a first side extending along a first direction, the length of the first side of the first pixel aperture is greater than or equal to the length of the remaining sides of the first pixel aperture, and greater than or equal to the maximum side length of the pixel aperture of the remaining light-emitting color. The display substrate according to claim 1, wherein at the positions of at least two pixel apertures of different light-emitting colors, the outward extension of the aperture in a direction parallel to the base and perpendicular to the first direction is inversely proportional to the orthographic length of the pixel aperture.

3. The display substrate according to claim 2, wherein at the positions of at least two pixel apertures with different light-emitting colors, in the first direction parallel to the base, the outward extension of the aperture is inversely proportional to the orthographic length of the pixel aperture.

4. The first pixel aperture is a red pixel aperture that emits red light, and the pixel aperture further includes a blue pixel aperture that emits blue light and a green pixel aperture that emits green light. The display substrate according to claim 2 or 3, wherein one blue pixel aperture, one red pixel aperture, and one green pixel aperture are sequentially arranged along a direction perpendicular to the first direction to form a repeating unit, and a plurality of the repeating units are sequentially arranged along a direction perpendicular to the first direction to form a row of pixel apertures.

5. The first pixel aperture is a blue pixel aperture that emits blue light, and the pixel aperture further includes a red pixel aperture that emits red light and a green pixel aperture that emits green light. The display substrate according to claim 2 or 3, wherein one red pixel opening, one green pixel opening, and one blue pixel opening form a repeating unit, and within the repeating unit, the red pixel opening and the green pixel opening are arranged along the first direction, and a straight line passing through the center of the blue pixel opening and perpendicular to the first direction is located in the gap between the red pixel opening and the green pixel opening, and a plurality of the repeating units are arranged sequentially along a direction perpendicular to the first direction to form a row of pixel openings.

6. The first pixel aperture is a blue pixel aperture that emits blue light, and the pixel aperture further includes a red pixel aperture that emits red light, and a first green pixel aperture and a second green pixel aperture that emit green light. The display substrate according to claim 2 or 3, wherein one red pixel aperture, one first green pixel aperture, one second green pixel aperture, and the blue pixel aperture form a repeating unit, and within the repeating unit, the centers of the red pixel aperture, the blue pixel aperture, the first green pixel aperture, and the second green pixel aperture form a rectangle, two sides of the rectangle are parallel to the first direction, and the remaining two sides are perpendicular to the first direction, and the line connecting the center of the red pixel aperture and the center of the blue pixel aperture forms the first diagonal of the rectangle, and the repeating units are sequentially arranged along a direction parallel to the first diagonal to form a row of pixel apertures.

7. The projection of the pixel aperture onto the base is circular, and the pixel aperture includes a blue pixel aperture that emits blue light, a red pixel aperture that emits red light, and a first green pixel aperture and a second green pixel aperture that emit green light. The display substrate according to claim 1, wherein one red pixel aperture, one first green pixel aperture, one second green pixel aperture, and one blue pixel aperture form a repeating unit, and within the repeating unit, the centers of the red pixel aperture, the blue pixel aperture, the first green pixel aperture, and the second green pixel aperture form a rectangle, the line connecting the center of the red pixel aperture and the center of the blue pixel aperture forms the first diagonal of the rectangle, and the repeating units are sequentially arranged along a direction parallel to the first diagonal to form a row of pixel apertures.

8. The display substrate according to any one of claims 1 to 7, wherein, in the same direction parallel to the base, the ratio of the outward spread of the pixel apertures of at least two different light-emitting colors is approximately inversely proportional to the ratio of the orthographic projection lengths of the corresponding light-emitting color pixel apertures.

9. The display substrate according to any one of claims 1 to 8, wherein the outward expansion range of the opening is 2 nm to 10 nm.

10. The display substrate further includes a light-emitting portion located at the pixel aperture and a color filter layer located on the side of the black matrix away from the pixel definition layer, wherein the color filter layer includes a color resist located at the black matrix aperture. The display substrate according to any one of claims 1 to 9, wherein the peak wavelength of the transmission spectrum of the color resist is blue-shifted with respect to the peak wavelength of the emission spectrum of the corresponding light-emitting portion.

11. The display substrate according to claim 10, wherein the peak wavelength of the transmission spectrum of the color resist is blue-shifted by 10 nm to 15 nm with respect to the peak wavelength of the emission spectrum of the corresponding light-emitting portion.

12. The display substrate according to claim 10, wherein the length by which the peak wavelengths of the transmission spectra of different color resists blueshift with respect to the peak wavelength of the emission spectrum of the corresponding light-emitting portion is approximately the same.

13. The aforementioned color resist includes a red color resist that filters red light, a blue color resist that filters blue light, and a green color resist that filters green light. The display substrate according to claim 10, wherein the green light intensity attenuation spectrum emitted through the green color resist is located between the red light intensity attenuation spectrum emitted through the red color resist and the blue light intensity attenuation spectrum emitted through the blue color resist.

14. The display substrate according to claim 10, wherein the light-emitting portion includes an organic light-emitting layer.

15. The display substrate according to any one of claims 1 to 14, further comprising a sealing layer located between the pixel definition layer and the black matrix, and a touch layer located between the sealing layer and the black matrix.

16. A display device including a display board according to any one of claims 1 to 15.

Images