Display panel and display device

Abstract

An embodiment of the present application provides a display panel and a display device. The display panel includes a substrate, a light-emitting layer, a pixel definition layer, a color filter layer, and a black matrix layer. The light-emitting layer includes a plurality of first light-emitting units and a plurality of second light-emitting units. The pixel definition layer defines a plurality of first pixel openings and a plurality of second pixel openings, and includes a first portion and a second portion. The first pixel openings are located in the first portion, and the transmittance of the first portion is less than that of the second portion. The color filter layer includes a plurality of first color-resist blocks and a plurality of second color-resist blocks, and the projected area of the first color-resist blocks on the substrate is greater than the projected area of the second color-resist blocks on the substrate. The black matrix layer is located on the side of the pixel definition layer away from the substrate, and includes a plurality of first openings arranged at intervals. Each second color-resist block covers a first opening and a part of the structure is placed inside the first opening. The projected area of the first pixel openings on the substrate is less than the projected area of the first openings on the substrate.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] Due to advantages such as being thin and light, high brightness, low power consumption, fast response, high clarity, good flexibility, and high luminous efficiency, OLED (Organic Light-Emitting Diode) display panels are widely used in display devices such as mobile phones and computers. To reduce the reflectivity of ambient light irradiated onto the OLED display panel, a polarizer is added to the OLED display panel. However, the bending performance of the polarizer is poor, which is not conducive to the bending and curling of the display panel with the polarizer, and the transmittance of the polarizer is not high (only about 40%). Therefore, a COE (Color Filter On Encapsulation Layer) structure is used to replace the polarizer to improve the bending performance of the display panel, increase the transmittance of the display panel, and reduce the power consumption of the display panel.

[0003] In related technologies, the COE structure includes a color film layer and a BM (Black Matrix layer) disposed on the encapsulation layer of the display panel. The color film layer includes a plurality of color resistance blocks, and the plurality of color resistance blocks are placed in the openings of the BM layer. When the OLED display panel is in the dark state, after ambient light enters the OLED display panel and is reflected by the structure inside the OLED display panel, since the BM layer is an opaque structure, diffraction occurs when the reflected light passes through the plurality of color resistance blocks. And due to differences in the diffraction patterns and diffraction pattern sizes of the reflected light at color resistance blocks of different colors and different sizes, serious color separation occurs on the surface of the OLED display panel, affecting the optical characteristics of the OLED display panel in the dark state. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a display panel and a display device to improve the color separation phenomenon of the display panel and enhance the optical characteristics of the display panel in the dark state. The specific technical solutions are as follows:

[0005] An embodiment of the first aspect of the present application provides a display panel, which includes:

[0006] A substrate

[0007] A light-emitting layer, the light-emitting layer is located on one side of the substrate, and the light-emitting layer includes a plurality of first light-emitting units and a plurality of second light-emitting units;

[0008] A pixel definition layer, which is located on one side of the substrate. The pixel definition layer defines a plurality of first pixel openings and a plurality of second pixel openings. The plurality of first light-emitting units are disposed within the plurality of first pixel openings, and the plurality of second light-emitting units are disposed within the plurality of second pixel openings. The pixel definition layer includes a first portion and a second portion. The first pixel openings are located in the first portion, and the transmittance of the first portion is less than that of the second portion.

[0009] A color filter layer, which is located on the side of the pixel definition layer away from the substrate. The color filter layer includes a plurality of first color-resist blocks corresponding to the plurality of first light-emitting units, and a plurality of second color-resist blocks corresponding to the plurality of second light-emitting units. The projected area of the first color-resist blocks on the substrate is larger than the projected area of the second color-resist blocks on the substrate.

[0010] A black matrix layer, which is located on the side of the pixel definition layer away from the substrate. The black matrix layer includes a plurality of first openings arranged at intervals. Each second color-resist block covers one first opening and part of its structure is disposed within the first opening. The projected area of the first pixel openings on the substrate is less than the projected area of the first openings on the substrate.

[0011] In some embodiments, the light-emitting layer further includes a plurality of third light-emitting units. The color filter layer further includes a plurality of third color-resist blocks corresponding to the plurality of third light-emitting units. The black matrix layer includes a plurality of second openings. Each third color-resist block covers one second opening and part of its structure is disposed within the second opening.

[0012] The projected area of the first pixel openings on the substrate is less than the projected area of the second openings on the substrate, and the projected area of the second openings on the substrate is less than the projected area of the first openings on the substrate.

[0013] In some embodiments, the first color-resist blocks are blue color-resist blocks, the second color-resist blocks are red color-resist blocks, and the third color-resist blocks are green color-resist blocks.

[0014] In some embodiments, the black matrix layer includes a plurality of third openings. Each first color-resist block covers one third opening, and at least part of the structure of the first color-resist block is disposed within the third opening. The projected size area of the third openings on the substrate is the projected area of the first pixel openings on the substrate.

[0015] In some embodiments, the projection of the first color-resist blocks on the substrate is located inside the projection of the third openings on the substrate.

[0016] In some embodiments, the black matrix layer includes a plurality of third openings. Each first color resist block covers one third opening and part of its structure is disposed within the third opening. The area of the third opening is smaller than the area of the second opening, and the area of the second opening is smaller than the area of the first opening.

[0017] In some embodiments, along the first direction, the first opening, the second opening, and the third opening are rectangular. The length of the third opening is 0.8 to 0.9 times the length of the second opening, and the length of the first opening is 1.1 to 1.3 times the length of the second opening.

[0018] In some embodiments, the display panel further includes a packaging layer. The packaging layer is located on a side of the pixel defining layer away from the substrate and covers the plurality of first light emitting units and the plurality of second light emitting units. The color filter layer and the black matrix layer are located on a side of the packaging layer away from the substrate.

[0019] In some embodiments, the projection of the first side of the first part on the substrate is parallel to the projection of the second side of the second opening on the substrate, and the distance between the projection of the first side on the substrate and the projection of the second side on the substrate is less than or equal to 2 micrometers. The first side is the side of the first part close to the second part, and the second side is the side of the second opening close to the third color resist block.

[0020] Embodiments of the second aspect of the present application provide a display device, which includes the display panel described in any one of the above.

[0021] Advantageous effects of the embodiments of the present application:

[0022] In the display panel provided by the embodiment of the present application, the light-emitting layer includes a plurality of first light-emitting units and a plurality of second light-emitting units, the pixel definition layer includes a plurality of first pixel openings and a plurality of second pixel openings, at least a part of each first light-emitting unit is disposed in one first pixel opening, and at least a part of each second light-emitting unit is disposed in one second pixel opening to separate adjacent first light-emitting units and second light-emitting units. The color filter layer includes a plurality of first color-resist blocks corresponding to the plurality of first light-emitting units one by one, and a plurality of second color-resist blocks corresponding to the plurality of second light-emitting units one by one, and the size of the first color-resist block in the first direction is greater than that of the second color-resist block. In the display panel provided by the embodiment of the present application, the pixel definition layer includes a first part and a second part, the first pixel opening is located in the first part and the first light-emitting unit is disposed in the first pixel opening. Since the transmittance of the first part is less than that of the second part, when ambient light enters the interior of the display panel and is reflected by a partial layer structure in the light-emitting unit, the reflected light diffracts inside the display panel, and part of the diffracted light passes through the first color-resist block and the first pixel opening. The first pixel opening serves as a light-transmitting hole, and the size of the light-transmitting hole corresponding to the first color-resist block is defined by the first pixel opening. The transmittance of the black matrix layer is small, and part of the diffracted light passes through the first opening and the second color-resist block. The first opening serves as a light-transmitting hole, and the size of the light-transmitting hole corresponding to the second color-resist block is defined by the first opening. Since the projected area of the first pixel opening on the substrate is smaller than the projected area of the first opening on the substrate, the light-transmitting hole corresponding to the first color-resist block, such as the blue color-resist block, is smaller than the light-transmitting hole corresponding to the second color-resist block, such as the red color-resist block or the green color-resist block. The size of the light-transmitting hole is related to the diffraction range and reflection range of the light, so the difference in the diffraction patterns and the sizes of the diffraction patterns of the diffracted light passing through the first color-resist block and the second color-resist block can be reduced, so that the diffracted light passing through different color-resist blocks can be more fused into white light, improving the phenomenon of color separation generated by the display panel and improving the optical characteristics of the display panel in the dark state.

[0023] Of course, it is not necessary for any product or method implementing the present application to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other embodiments according to these drawings.

[0025] Figure 1 It is a structural diagram of a display panel in some embodiments of the present application;

[0026] Figure 2 For Figure 1An enlarged view of the middle region A;

[0027] Figure 3 is Figure 1 Another enlarged view of the middle region A;

[0028] Figure 4 is a cross-sectional view along Figure 1 the B-B direction in the middle;

[0029] Figure 5 is a cross-sectional view along Figure 1 Another cross-sectional view along the B-B direction in the middle;

[0030] Figure 6 is a cross-sectional view along Figure 1 Another cross-sectional view along the B-B direction in the middle;

[0031] Figure 7 is a light transmission spectrum diagram of a first color resistor block in some embodiments of the present application. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the scope of protection of the present application.

[0033] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless otherwise clearly specified in the context, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that alternative or additional steps may be used.

[0034] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms do not imply an order or sequence when used in this document. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0035] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. These relative terms, such as "inner," "outer," "inner side," "outer side," "below," "beneath," "above," "over," etc., are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the exemplary term "below" can include both an upper and a lower orientation. The device may be otherwise oriented, such as rotated 90 degrees or in other directions, and the spatial relative descriptors used herein are to be interpreted accordingly.

[0036] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intervening layers. Additionally, it is understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there may be more than one intervening layer or element. Further, it is understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intervening layer or element. Like reference numerals throughout the text denote like elements.

[0037] In the related art, the COE structure includes a color filter layer and a BM layer disposed on the display panel encapsulation layer. The color filter layer generally includes a plurality of blue color resist blocks, a plurality of red color resist blocks, and a plurality of green color resist blocks. At least a part of the plurality of blue color resist blocks, the plurality of red color resist blocks, and the plurality of green color resist blocks are placed in the openings of the BM layer. Since in the display panel, the attenuation rate of blue light is relatively fast, the size of the blue color resist blocks is larger than that of the red color resist blocks and the green color resist blocks to reduce the attenuation rate of blue light, so as to improve the yellowing phenomenon after long-term use of the display panel. The ambient light enters the interior of the display panel in the form of monochromatic light after being filtered by color resist blocks of different colors, and reaches the color filter layer and the BM layer again after being reflected by the layer structure inside the display panel. Since the BM layer is an opaque film layer, diffraction occurs at each color resist block for the reflected light. Also, because the colors and sizes of the plurality of color resist blocks are different, there may be significant differences in the diffraction patterns and the sizes of the diffraction patterns after diffraction at different color resist blocks, resulting in serious color separation on the surface of the display panel in the dark state. When the human eye observes the display panel, serious color separation occurs visually, affecting the optical characteristics of the display panel in the dark state.

[0038] To improve the color separation phenomenon of the display panel and enhance the optical characteristics of the display panel in the dark state, the embodiments of the present application provide a display panel and a display device. The following will describe in detail the display panel and the display device provided by the embodiments of the present application with reference to the accompanying drawings. Among them, the display panel can be an electroluminescent display panel or a photoluminescent display panel. When the display panel is an electroluminescent display panel, the electroluminescent display panel can be an OLED (Organic Light-Emitting Diode) or a QLED (Quantum Dot Light Emitting Diodes). When the display panel is a photoluminescent display panel, the photoluminescent display panel can be a quantum dot photoluminescent display panel.

[0039] The embodiments of the first aspect of the present application provide a display panel, such as Figures 1 to 4As shown, the display panel 100 includes a substrate 1, a light-emitting layer 2, a pixel definition layer 3, a color filter layer 4, and a black matrix layer 5. The light-emitting layer 2 is located on one side of the substrate 1. The light-emitting layer 2 includes a plurality of first light-emitting units 21 and a plurality of second light-emitting units 22. The pixel definition layer 3 is located on one side of the substrate 1. The pixel definition layer 3 and the light-emitting layer 2 are located on the same side of the substrate 1. The pixel definition layer 3 defines a plurality of first pixel openings 31 and a plurality of second pixel openings 32. A plurality of first light-emitting units 21 are disposed in the plurality of first pixel openings 31, and a plurality of second light-emitting units 22 are disposed in the plurality of second pixel openings 32. The pixel definition layer 3 includes a first portion 33 and a second portion 34. The first pixel opening 31 is located in the first portion 33, and the transmittance of the first portion 33 is less than that of the second portion. The color filter layer 4 is located on the side of the pixel definition layer 3 away from the substrate 1. The color filter layer 4 includes a plurality of first color-resist blocks 41 corresponding to the plurality of first light-emitting units 21, and a plurality of second color-resist blocks 42 corresponding to the plurality of second light-emitting units 22. The projected area of the first color-resist block 41 on the substrate 1 is larger than the projected area of the second color-resist block 42 on the substrate 1. The black matrix layer 5 is located on the side of the pixel definition layer 3 away from the substrate 1. The black matrix layer 5 includes a plurality of first openings 51 arranged at intervals. Each second color-resist block 42 covers one first opening 51 and a part of the structure is disposed in the first opening 51. The projected area of the first pixel opening 31 on the substrate is smaller than the projected area of the first opening 51 on the substrate.

[0040] In the embodiment of the present application, the plurality of first pixel openings 31 and the plurality of second pixel openings 32 are recessed structures formed on the surface of the pixel definition layer 3. Each first pixel opening 31 is used to accommodate one first light-emitting unit 21, and each second pixel opening 32 is used to accommodate one second light-emitting unit 22, so that the pixel definition layer 3 can separate adjacent light-emitting units and reduce the optical crosstalk between adjacent light-emitting units. Herein, the light-emitting unit is a general term for the first light-emitting unit 21 and the second light-emitting unit 22. Optionally, the first light-emitting unit 21 and the second light-emitting unit 22 have the same structure. As Figure 6 shown, the first light-emitting unit 21 and the second light-emitting unit 22 include an anode layer 211, an organic light-emitting layer 212, and a cathode layer 213 arranged in sequence along the direction away from the substrate 1. Optionally, the cathode layers 213 of the plurality of first light-emitting units 21 and the plurality of second light-emitting units 22 are connected as a whole.

[0041] Optionally, the materials of the anode layer 211 and the cathode layer 213 may include transparent metal oxides, such as indium zinc oxide (IZO), indium tin oxide (ITO), etc. The materials of the anode layer 211 and the cathode layer 213 may also include metal materials such as copper, aluminum, silver, or alloy materials containing the above metal materials, etc., which can be set according to actual needs, and the present application does not limit this. After the ambient light enters the display panel through the color film layer 4, it is mainly reflected by the anode layer 211 and the cathode layer 213 to form reflected light.

[0042] Optionally, the light transmittance of the first part 33 included in the pixel definition layer 3 is relatively small. The first part 33 can be made of a material with a relatively small transmittance, or a film layer with a relatively small transmittance is coated on the surface of the first part 33. Optionally, the first part 33 is made of a light-impermeable material.

[0043] In the embodiment of the present application, the light transmittance of the black matrix layer 5 is relatively small, and the first opening 51 is a light-transmitting area of the black matrix layer 5. The first opening 51 is used to accommodate the second color resist block 42. As Figure 4 shown, the thickness of the second color resist block 42 may be greater than the thickness of the black matrix layer 5. A partial structure of each second color resist block 42 is placed in the first opening 51, and each second color resist block 42 covers the first opening 51. The first color resist block 41 and the second color resist block 42 have different sizes and colors. Optionally, the first color resist block 41 is a blue color resist block, and the second color resist block 42 is a red color resist block or a green color resist block.

[0044] Each first color resist block 41 is correspondingly arranged with a first light-emitting unit 21, that is, the projection of each first color resist block 41 on the light-emitting layer 2 covers the corresponding first light-emitting unit 21. Each second color resist block 42 is correspondingly arranged with a second light-emitting unit 22, that is, the projection of each second color resist block 42 on the light-emitting layer 2 covers the corresponding second light-emitting unit 22. The first color resist block 41 and the second color resist block 42 are used to absorb light of a color different from their own, so that light of the same color as themselves can pass through, realizing the light filtering of the display panel 100.

[0045] In the display panel provided by the embodiment of the present application, the pixel definition layer 3 includes a first part 33 and a second part 34. The first pixel opening 31 is located in the first part 33, and the first light-emitting unit 21 is placed in the first pixel opening 31. Since the transmittance of the first part 33 is less than that of the second part, when ambient light enters the interior of the display panel 100 and is reflected by a partial layer structure in the light-emitting unit, such as being reflected by the anode layer 211 and the cathode layer 213 in the light-emitting unit, the reflected light diffracts inside the display panel. Part of the diffracted light passes through the first color filter block 41 and the first pixel opening 31. The first color filter block and the first pixel opening are used as light-transmitting holes, and the size of the light-transmitting hole corresponding to the first color filter block 41 is defined by the first pixel opening 31. The transmittance of the black matrix layer 5 is relatively small. Part of the diffracted light passes through the second color filter block 42 and the first opening 51. The first opening is used as a light-transmitting hole for the diffracted light, and the size of the light-transmitting hole corresponding to the second color filter block 42 is defined by the first opening 51. Since the projected area of the first pixel opening 31 on the substrate is smaller than the projected area of the first opening 51 on the substrate, the light-transmitting hole corresponding to the first color filter block 41, such as the light-transmitting hole corresponding to the blue color filter block, is smaller than the diffraction hole corresponding to the second color filter block 42, such as the diffraction hole corresponding to the red color filter block or the green color filter block. The size of the light-transmitting hole is related to the diffraction range and reflection range of the light. Therefore, the difference in the diffraction patterns and the sizes of the diffraction patterns at the first color filter block 41 and the second color filter block 42 can be reduced, so that the diffracted light passing through different color filter blocks can be more fused into white light, improving the phenomenon of color separation generated by the display panel 100 and enhancing the optical characteristics of the display panel 100 in the dark state.

[0046] Optionally, when the first color filter block 41 and the second color filter block 42 are circular, the radius of the first color filter block 41 can be greater than the radius of the second color filter block 42; when the first color filter block 41 and the second color filter block 42 are rectangular, the length of the first color filter block 41 can be greater than the length of the second color filter block 42, or the width of the first color filter block 41 can be greater than the width of the second color filter block 42. Optionally, when the projections of the first pixel opening 31 and the first opening 51 are circular, the projected radius of the first pixel opening 31 on the substrate 1 can be smaller than the projected radius of the first opening 51 on the substrate 1; when the projections of the first pixel opening 31 and the first opening 51 are rectangular, the projected length of the first pixel opening 31 on the substrate 1 can be smaller than the projected length of the first opening 51 on the substrate 1, or the projected width of the first pixel opening 31 on the substrate 1 can be smaller than the projected width of the first opening 51 on the substrate 1, so that the light-transmitting hole corresponding to the first color filter block 41 is smaller than the corresponding diffraction hole, thereby reducing the difference in the diffraction patterns and the sizes of the diffraction patterns at the first color filter block 41 and the second color filter block 42, and enabling the diffracted light passing through different color filter blocks to be more fused into white light, improving the phenomenon of color separation generated by the display panel 100.

[0047] In some embodiments, the light-emitting layer 2 further includes a plurality of third light-emitting units 23, the color filter layer 4 further includes a plurality of third color-resist blocks 43 corresponding to the plurality of third light-emitting units 23, the black matrix layer 5 includes a plurality of second openings 52, each third color-resist block 43 covers one second opening 52 and part of the structure is disposed within the second opening 52. The projected area of the first pixel opening 31 on the substrate 1 is smaller than the projected area of the second opening 52 on the substrate 1, and the projected area of the second opening 52 on the substrate 1 is smaller than the projected area of the first opening 51 on the substrate 1.

[0048] In the embodiments of the present application, each third color-resist block 43 is correspondingly disposed with a third light-emitting unit 23, that is, the orthographic projection of each third color-resist block 43 on the light-emitting layer 2 covers the corresponding third light-emitting unit 23. Each third light-emitting unit 23 is disposed within a second pixel opening 32. Part of the structure of each third color-resist block 43 is disposed within a second opening 52, and each third color-resist block 43 covers one second opening 52. The structure of the third light-emitting unit 23 is the same as the structure of the first light-emitting unit 21.

[0049] In the embodiments of the present application, since the transmittance of the black matrix layer 5 is small, after the ambient light diffracts inside the display panel, part of the diffracted light passes through the third color-resist block 43 and the second opening 52, and the second opening 52 also serves as a light-transmitting hole, and the size of the light-transmitting hole corresponding to the third color-resist block 43 is defined by the second opening 52. Since the projected area of the first pixel opening 31 on the substrate is smaller than the projected area of the second opening 52 on the substrate 1, the light-transmitting hole corresponding to the first color-resist block 41 is smaller than the light-transmitting hole corresponding to the third color-resist block 43, and the light-transmitting hole corresponding to the third color-resist block 43 is smaller than the light-transmitting hole corresponding to the second color-resist block 42, thereby reducing the difference in the diffraction pattern and the size of the diffraction pattern after the diffracted light passes through the first color-resist block 41, the second color-resist block 42, and the third color-resist block 43, so that the diffracted light passing through different color-resist blocks can be more fused into white light, further improving the phenomenon of color separation generated by the display panel 100, and further improving the optical characteristics of the display panel 100 in the dark state.

[0050] Optionally, when the projections of the first pixel aperture 31, the first aperture 51, and the second aperture 52 are circular, the projected radius of the first pixel aperture 31 on the substrate 1 is less than the projected radius of the second aperture 52 on the substrate 1, and the projected radius of the second aperture 52 on the substrate 1 is less than the projected radius of the first aperture 51 on the substrate 1; when the projections of the first pixel aperture 31, the first aperture 51, and the second aperture 52 are rectangular, the projected length of the first pixel aperture 31 on the substrate 1 is less than the projected length of the second aperture 52 on the substrate 1, and the projected length of the second aperture 52 on the substrate 1 is less than the projected length of the first aperture 51 on the substrate 1, or the projected width of the first pixel aperture 31 on the substrate 1 is less than the projected width of the second aperture 52 on the substrate 1, and the projected width of the second aperture 52 on the substrate 1 is less than the projected width of the first aperture 51 on the substrate 1. Based on this, the light-transmitting hole corresponding to the first color-resist block 41 is made smaller than the light-transmitting hole corresponding to the third color-resist block 43, and the light-transmitting hole corresponding to the third color-resist block 43 is smaller than the light-transmitting hole corresponding to the second color-resist block 42, thereby reducing the difference in the diffraction patterns and the sizes of the diffraction patterns of the diffracted light after passing through the first color-resist block 41, the second color-resist block 42, and the third color-resist block 43, so that the diffracted light passing through different color-resist blocks can be more fused into white light, further improving the phenomenon of color separation generated by the display panel 100.

[0051] Optionally, the first color-resist block 41 is a blue color-resist block, the second color-resist block 42 is a red color-resist block, and the third color-resist block 43 is a green color-resist block.

[0052] In the embodiment of the present application, the ambient light is red light after being filtered by the second color-resist block 41, the ambient light is green light after being filtered by the third color-resist block 43, and the ambient light is blue light after being filtered by the first color-resist block 41.

[0053] For example, taking the first color-resist block 41 as a blue color-resist block, the second color-resist block 42 as a red color-resist block, the third color-resist block 43 as a green color-resist block, and the first color-resist block 41, the second color-resist block 42, and the third color-resist block 43 being circular, the radius of the light-transmitting hole being r, the viewing distance of the human eye relative to the display panel being f, and the wavelength of the light passing through each color-resist block being λ as an example, the radius R of the diffraction pattern of the diffracted light passing through each color-resist block can be calculated by the following formula:

[0054]

[0055] Since the viewing distance f of the human eye relative to the display panel remains unchanged, it can be seen from the above formula (1) that the diffraction pattern radius R of the diffracted light after passing through each color resistor block is related to the color of each color resistor block and the light-transmitting hole size r. Since the wavelength of red light is greater than that of green light, and the wavelength of green light is greater than that of blue light, along the first direction, the projected size of the first pixel opening 31 on the substrate is smaller than the projected size of the second opening 52 on the substrate 1, and the projected size of the second opening 52 on the substrate 1 is smaller than the projected size of the first opening 51 on the substrate 1, which can make the light-transmitting hole radius r1 corresponding to the blue color resistor block (the first color resistor block 41), the light-transmitting hole radius r2 corresponding to the green color resistor block (the third color resistor block 43), and the light-transmitting hole radius r3 corresponding to the red color resistor block (the second color resistor block 42) satisfy: r1 < r2 < r3, so that the diffraction pattern radius R1 of the diffracted light passing through the blue color resistor block, the diffraction pattern radius R2 of the diffracted light passing through the green color resistor block, and the diffraction pattern radius R3 of the diffracted light passing through the red color resistor block satisfy: R1 ≈ R2 ≈ R3, making the diffraction pattern sizes of the diffracted light passing through the blue color resistor block, the red color resistor block, and the green color resistor block similar, further improving the color separation phenomenon generated by the display panel 100 and further improving the optical characteristics of the display panel 100 in the dark state.

[0056] Among them, the diffraction pattern radius of the diffracted light passing through each color resistor block can be the radius of the central bright spot of the diffraction pattern of the diffracted light after passing through each color resistor block.

[0057] In some embodiments, the black matrix layer 5 includes a plurality of third openings 53, each first color resistor block 41 covers a third opening 53, and at least part of the structure of the first color resistor block 41 is placed inside the third opening 53, and the projected area of the third opening 53 on the substrate 1 is larger than the projected area of the first pixel opening 31 on the substrate.

[0058] In the embodiments of the present application, the projected area of the third opening 53 on the substrate 1 is larger than the projected area of the first pixel opening 31 on the substrate, so that the size of the light-transmitting hole corresponding to the first color resistor block 41 is only limited by the first pixel opening 31, reducing the influence of the size of the third opening 53 on the size of the light-transmitting hole corresponding to the first color resistor block 41, thereby facilitating the adjustment of the size of the light-transmitting hole corresponding to the first color resistor block 41 through the first pixel opening 31.

[0059] Optionally, the first color resistor block 41 can be partially placed inside the third opening 53, as Figure 2 shown and Figure 5 shown, Figure 5 is a cross-sectional view when the first color resistor block 41 is partially placed inside the third opening 53. The first color resistor block 41 can be entirely placed inside the third opening 53, as Figure 3 andFigure 4 As shown Figure 4 is a cross-sectional view when the first color-resist block 41 is completely placed inside the third opening 53.

[0060] In some embodiments, such as Figure 3 and Figure 4 As shown, the projection of the first color-resist block 41 on the substrate 1 is located inside the projection of the third opening 53 on the substrate 1. That is, the first color-resist block 41 is completely placed inside the third opening 53, there is no overlap between the edge of the projection of the first color-resist block 41 on the substrate 1 and the projection of the third opening 53 on the substrate 1, and the black matrix layer 5 is not provided in the first color-resist block 41, further reducing the influence of the size of the third opening 53 on the size of the light-transmitting hole corresponding to the first color-resist block 41.

[0061] In some embodiments, such as Figure 5 As shown, the black matrix layer 5 includes a plurality of third openings 53, each first color-resist block 41 covers one third opening 53 and part of the structure is placed inside the third opening 53, the area of the third opening 53 is smaller than the area of the second opening 52, and the area of the second opening 52 is smaller than the area of the first opening 51.

[0062] In the embodiments of the present application, the size of the light-transmitting hole corresponding to the first color-resist block 41 is defined by the third opening 53, the size of the light-transmitting hole corresponding to the third color-resist block 43 is defined by the second opening 52, and the size of the light-transmitting hole corresponding to the second color-resist block 42 is defined by the first opening 51. Since the area of the third opening 53 is smaller than the area of the second opening 52, and the area of the second opening 52 is smaller than the area of the first opening 51, combined with the above formula (1), it can be seen that the light-transmitting hole corresponding to the first color-resist block 41 is smaller than the light-transmitting hole corresponding to the third color-resist block 43, and the light-transmitting hole corresponding to the third color-resist block 43 is smaller than the light-transmitting hole corresponding to the second color-resist block 42, so that the diffraction pattern sizes are similar after the diffracted light passes through the first color-resist block 41, the second color-resist block 42 and the third color-resist block 43, further improving the phenomenon of color separation generated by the display panel 100, and further improving the optical characteristics of the display panel 100 in the dark state.

[0063] Optionally, when the projections of the first opening 51, the second opening 52, and the third opening 53 are circular, the projected radius of the third opening 53 on the substrate 1 is smaller than the projected radius of the second opening 52 on the substrate 1, and the projected radius of the second opening 52 on the substrate 1 is smaller than the projected radius of the first opening 51 on the substrate 1; when the projections of the first opening 51, the second opening 52, and the third opening 53 are rectangular, the projected length of the third opening 53 on the substrate 1 is smaller than the projected length of the second opening 52 on the substrate 1, and the projected length of the second opening 52 on the substrate 1 is smaller than the projected length of the first opening 51 on the substrate 1, or the projected width of the third opening 53 on the substrate 1 is smaller than the projected width of the second opening 52 on the substrate 1, and the projected width of the second opening 52 on the substrate 1 is smaller than the projected width of the first opening 51 on the substrate 1. Based on this, the light-transmitting hole corresponding to the third color-resist block 43 is made smaller than the light-transmitting hole corresponding to the second color-resist block 42, so that the sizes of the diffraction patterns after the diffracted light passes through the first color-resist block 41, the second color-resist block 42, and the third color-resist block 43 are similar, further improving the phenomenon of color separation generated by the display panel 100 and further improving the optical characteristics of the display panel 100 in the dark state.

[0064] Optionally, the first opening 51, the second opening 52, and the third opening 53 are rectangular, the length of the third opening 53 is 0.8 to 0.9 times the length of the second opening 52, and the length of the first opening 51 is 1.1 to 1.3 times the length of the second opening 52, so that the sizes of the diffraction patterns after the diffracted light passes through the first color-resist block 41, the second color-resist block 42, and the third color-resist block 43 are more similar, further improving the phenomenon of color separation generated by the display panel 100 and further improving the optical characteristics of the display panel 100 in the dark state. In one example, the length of the third opening 53 is 0.86 times the length of the second opening 52, and the length of the first opening 51 is 1.2 times the length of the second opening 52.

[0065] In some embodiments, the display panel 100 further includes a packaging layer 6, and the packaging layer 6 is located on the side of the pixel definition layer 3 away from the substrate 1 and covers the plurality of first light-emitting units 21 and the plurality of second light-emitting units 22, and the color filter layer 4 and the black matrix layer 5 are located on the side of the packaging layer 6 away from the substrate 1.

[0066] In the embodiments of the present application, the packaging layer 6 covers the light-emitting layer 2 and is used to package the structures such as the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23 below, reducing the probability of failure of the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23 caused by impurities such as water and oxygen entering the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23. Optionally, the packaging layer 6 can be a multi-layer packaging layer to improve the tightness of the packaging layer 6 and improve the packaging effect of the packaging layer 6.

[0067] In some embodiments, such as Figure 4 shown, the projection of the first side of the first portion 33 on the substrate 1 is parallel to the projection of the second side of the second opening 52 on the substrate 1, and the distance L1 between the projection of the first side on the substrate 1 and the projection of the second side on the substrate 1 is less than or equal to 2 micrometers. The first side is the side of the first portion 33 close to the second portion 34, and the second side is the side of the second opening 52 close to the third color resist block 43.

[0068] In the embodiments of the present application, such as Figure 4 shown, there is a distance L1 between the first side of the first portion 33 and the second side of the second opening 52, and the distance L1 is less than or equal to 2 micrometers. Therefore, there is a distance between the first portion 33 and the second pixel opening 32, reducing the influence of the first portion 33 on the second light-emitting unit in the second pixel opening 32 and reducing the influence of the first portion 33 on the diffraction range of the reflected light at the second color resist block 42. Optionally, the projection of the first side on the substrate 1 may overlap with the projection of the second side on the substrate 1.

[0069] In some embodiments, the first color resist block 41 allows light with wavelengths from 420 nm to 490 nm to pass through.

[0070] In the embodiments of the present application, the first color resist block 41 is a blue color resist block. Since the wavelength of red light is about 633 nm, the wavelength of green light is about 524 nm, and the wavelength of blue light is about 453 nm. The first color resist block 41 allowing light with wavelengths from 420 nm to 490 nm to pass through can reduce the transmittance of green light and red light in the blue color resist block, improving the light filtering effect of the first color resist block 41. Optionally, the first color resist block 41 allows light with wavelengths from 450 nm to 460 nm to pass through. As Figure 7 shown, Figure 7 is the light transmittance spectrum of the blue color resist block, Figure 7 where the abscissa is the wavelength of the light and the ordinate is the transmittance of the light in the blue color resist block. As can be seen from Figure 7 this, light with wavelengths from 490 nm to 780 nm has almost no transmittance in the blue color resist block 41, and the transmittance of light with wavelengths from 450 nm to 460 nm in the blue color resist block 41 is 70 - 85%, reducing the probability of green light and red light passing through the blue color resist block and improving the light filtering effect of the blue color resist block.

[0071] In some embodiments, such as Figure 6As shown in the figure, the display panel further includes a plurality of transistors 7. The plurality of transistors 7 are located on the side of the light-emitting layer 2 close to the substrate 1. Each transistor 7 is electrically connected to a light-emitting unit. The transistor 7 is used to drive the light-emitting layer 212 in the light-emitting unit to emit light by recombination. Optionally, the transistor 7 includes an active layer 71, a gate metal layer 72, and a source-drain metal layer 73 arranged in sequence along the direction away from the substrate 1. The gate metal layer 72 includes a gate 721. The source-drain metal layer 73 includes a source 731 and a drain 732. The source 731 and the drain 732 are connected to the active layer 71 through vias. The anode layer 211 of the light-emitting unit is connected to the drain 732 through vias. Among them, the light-emitting unit is an abbreviation of the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 33.

[0072] An embodiment of the second aspect of the present application provides a display device. The display device includes the display panel 100 described in any one of the above.

[0073] In the embodiments of the present application, the display device includes the display panel 100 in any one of the above embodiments. Among them, the display device includes, but is not limited to, mobile phones, tablet computers, monitors, televisions, painting screens, advertising screens, electronic papers, etc. Since the display device includes the above display panel 100, the display device has all the advantages of the above display panel 100.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments described in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel (100), characterized in that, Comprising: A substrate (1); A light-emitting layer (2) located on one side of the substrate (1), the light-emitting layer (2) including a plurality of first light-emitting units (21) and a plurality of second light-emitting units (22); A pixel definition layer (3) located on one side of the substrate (1), the pixel definition layer (3) defining a plurality of first pixel openings (31) and a plurality of second pixel openings (32), the plurality of first light-emitting units (21) being disposed within the plurality of first pixel openings (31), the plurality of second light-emitting units (22) being disposed within the plurality of second pixel openings (32), the pixel definition layer (3) including a first portion (33) and a second portion (34), the first pixel openings (31) being located in the first portion (33), and the transmittance of the first portion (33) being less than the transmittance of the second portion (34); A color filter layer (4) located on the side of the pixel definition layer (3) away from the substrate (1), the color filter layer (4) including a plurality of first color-resist blocks (41) corresponding to the plurality of first light-emitting units (21), and a plurality of second color-resist blocks (42) corresponding to the plurality of second light-emitting units (22), the projected area of the first color-resist blocks (41) on the substrate (1) being greater than the projected area of the second color-resist blocks (42) on the substrate (1); A black matrix layer (5) located on the side of the pixel definition layer (3) away from the substrate (1), the black matrix layer (5) including a plurality of first openings (51) arranged at intervals, each second color-resist block (42) covering one first opening (51) and a part of the structure being disposed within the first opening (51); The projected area of the first pixel openings (31) on the substrate (1) is less than the projected area of the first openings (51) on the substrate (1); The first pixel openings (31) define the size of the light-transmitting holes corresponding to the first color-resist blocks (41); the first openings (51) define the size of the light-transmitting holes corresponding to the second color-resist blocks (42); The light-emitting layer (2) further includes a plurality of third light-emitting units (23), the color filter layer (4) further includes a plurality of third color-resist blocks (43) corresponding to the plurality of third light-emitting units (23), and the black matrix layer (5) includes a plurality of second openings (52), each third color-resist block (43) covering one second opening (52) and a part of the structure being disposed within the second opening (52); There is a gap between the projection of the first side of the first part (33) on the substrate (1) and the projection of the second side of the second opening (52) on the substrate (1), or the projection of the first side on the substrate (1) overlaps with the projection of the second side on the substrate (1); the first side is the side of the first part (33) close to the second part (34), and the second side is the side of the second opening (52) close to the third color filter block (43).

2. The display panel (100) according to claim 1, wherein The projected area of the first pixel opening (31) on the substrate (1) is smaller than the projected area of the second opening (52) on the substrate (1), and the projected area of the second opening (52) on the substrate (1) is smaller than the projected area of the first opening (51) on the substrate (1).

3. The display panel (100) according to claim 2, wherein The first color filter block (41) is a blue color filter block, the second color filter block (42) is a red color filter block, and the third color filter block (43) is a green color filter block.

4. The display panel (100) according to claim 1, characterized in that, The black matrix layer (5) includes a plurality of third openings (53), each first color filter block (41) covers a third opening (53), at least a part of the structure of the first color filter block (41) is placed inside the third opening (53), and the projected area of the third opening (53) on the substrate (1) is larger than the projected area of the first pixel opening (31) on the substrate (1).

5. The display panel (100) according to claim 4, wherein, The projection of the first color filter block (41) on the substrate (1) is located inside the projection of the third opening (53) on the substrate (1).

6. The display panel (100) according to claim 2, wherein The black matrix layer (5) includes a plurality of third openings (53), each first color filter block (41) covers a third opening (53) and a part of the structure is placed inside the third opening (53), the area of the third opening (53) is smaller than the area of the second opening (52), and the area of the second opening (52) is smaller than the area of the first opening (51).

7. The display panel (100) according to claim 6, characterized in that, The first opening (51), the second opening (52) and the third opening (53) are rectangular, the length of the third opening (53) is 0.8 to 0.9 times the length of the second opening (52), and the length of the first opening (51) is 1.1 to 1.3 times the length of the second opening (52).

8. The display panel (100) according to claim 1, wherein, The display panel (100) further includes a packaging layer (6), the packaging layer (6) is located on the side of the pixel definition layer (3) away from the substrate (1) and covers the plurality of first light-emitting units (21) and the plurality of second light-emitting units (22), and the color film layer (4) and the black matrix layer (5) are located on the side of the packaging layer (6) away from the substrate (1).

9. The display panel (100) according to claim 2, wherein The projection of the first side of the first part (33) on the substrate substrate (1) is parallel to the projection of the second side of the second opening (52) on the substrate substrate (1), and the distance between the projection of the first side on the substrate substrate (1) and the projection of the second side on the substrate substrate (1) is less than or equal to 2 micrometers.

10. A display device, characterized in that, The display device includes the display panel (100) according to any one of claims 1 to 9.

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