Display panel and display device

Abstract

Embodiments of the present invention provide a display panel and a display device, which relate to the field of display technology and are used to improve the light extraction efficiency of the display panel. The display panel includes a first substrate, a second substrate, a light-emitting device layer, a black matrix, a low refractive index layer and a first embedded portion. The first substrate and the second substrate are arranged opposite to each other. The light-emitting device layer is arranged on a side of the first substrate close to the second substrate, and includes a plurality of light-emitting devices. The black matrix is ​​arranged on a side of the second substrate close to the first substrate, and has a plurality of openings, and an opening is directly opposite to a light-emitting device. The low refractive index layer is arranged on the inner wall of the opening. The first embedded portion is located in the opening and contacts the side of the low refractive index layer, and the side of the low refractive index layer is the surface of the low refractive index layer away from the inner wall of the opening. The refractive index of the low refractive index layer is less than the refractive index of the first embedded portion.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] A black matrix may be provided in an organic light emitting diode (OLED) display panel. The black matrix has a light shielding effect, which can improve the problem of light crosstalk between sub-pixels of different colors in the OLED display panel and improve the display effect of the display panel.

[0003] However, due to the light shielding effect of the black matrix, part of the light emitted by the light-emitting device in the OLED display panel directly enters the black matrix and is absorbed by the black matrix, resulting in low light extraction efficiency of the OLED display panel. Summary of the invention

[0004] Embodiments of the present invention provide a display panel and a display device, which are used to improve the light extraction efficiency of the display panel.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] In a first aspect, a display panel is provided. The display panel includes a first substrate, a second substrate, a light-emitting device layer, a black matrix, a low refractive index layer and a first embedded portion. The first substrate and the second substrate are arranged opposite to each other. The light-emitting device layer is arranged on a side of the first substrate close to the second substrate, and includes a plurality of light-emitting devices. The black matrix is ​​arranged on a side of the second substrate close to the first substrate, and has a plurality of openings, and an opening is directly opposite to a light-emitting device. The low refractive index layer is arranged on the inner wall of the opening. The first embedded portion is located in the opening and contacts the side of the low refractive index layer, and the side of the low refractive index layer is the surface of the low refractive index layer away from the inner wall of the opening. The refractive index of the low refractive index layer is less than the refractive index of the first embedded portion.

[0007] In some embodiments, the first embedded portion is a color filter.

[0008] In some embodiments, the display panel further includes a first glue layer. The first glue layer is disposed between the black matrix and the light-emitting device layer, and is configured to bond the first substrate and the second substrate together. The first glue layer includes a second embedded portion embedded in the opening, and the second embedded portion contacts the side of the low refractive index layer. The refractive index of the low refractive index layer is less than the refractive index of the second embedded portion.

[0009] In some embodiments, the display panel further includes a water absorbing layer disposed on a side of the color filter away from the second substrate and in contact with the color filter.

[0010] In some embodiments, the thickness of the color filter is less than the depth of the opening. The water absorbing layer is disposed in the opening.

[0011] In some embodiments, the thickness of the color filter is less than the depth of the opening, the black matrix includes a closed light shielding ring and a light shielding net surrounded by the light shielding ring, and the light shielding ring and the light shielding net form a plurality of openings. The thickness of the light shielding ring is greater than the thickness of the light shielding net, and the water absorbing layer covers the light shielding net and extends into the plurality of openings.

[0012] In some embodiments, the water absorbing layer contacts a side of the low refractive index layer, and the refractive index of the low refractive index layer is lower than that of the water absorbing layer.

[0013] In some embodiments, the display panel further includes a second adhesive layer disposed between the black matrix and the light-emitting device layer. The second adhesive layer is configured to bond the first substrate and the second substrate together. The second adhesive layer is integrated with the first embedded portion.

[0014] In some embodiments, the black matrix includes a first portion and a second portion, wherein the first portion is disposed on a side of the second portion away from the second substrate. The orthographic projection of the first portion on the second substrate is located inside the orthographic projection of the second portion on the second substrate. The low refractive index layer is disposed on a side wall of the first portion and exposes the side wall of the second portion.

[0015] In some embodiments, the opening has a first edge and a second edge, the first edge is farther away from the second substrate than the second edge, and an orthographic projection of the second edge on the second substrate is located inside an orthographic projection of the first edge on the second substrate.

[0016] In some embodiments, the display panel further comprises a lens layer disposed on a side of the second substrate away from the first substrate. The lens layer comprises at least one lens, and the opening is directly opposite to the at least one lens.

[0017] In the display panel provided in the first aspect, the first embedded portion contacts the side of the low refractive index layer, and the refractive index of the low refractive index layer is less than the refractive index of the first embedded portion. Therefore, when light passes through the first embedded portion with a higher refractive index and collides with the low refractive index layer with a lower refractive index at an incident angle greater than the critical angle, the light can be totally reflected. In this way, part of the light emitted by the light-emitting device that is directed toward the black matrix can be totally reflected, and then can be reflected back into the sub-pixel and emitted to the display surface side of the display panel, so that the light extraction efficiency of the display panel can be improved.

[0018] In a second aspect, a display panel is provided, comprising a first substrate and a second substrate, a light-emitting device layer, a black matrix, and a reflective layer. The first substrate and the second substrate are arranged opposite to each other. The light-emitting device layer is arranged on a side of the first substrate close to the second substrate, and comprises a plurality of light-emitting devices. The black matrix is ​​arranged on a side of the second substrate close to the first substrate, and has a plurality of openings. An opening is directly opposite to a light-emitting device. The reflective layer is arranged on the inner wall of the opening.

[0019] In some embodiments, the display panel further includes a water absorption layer disposed between the black matrix and the light emitting device layer.

[0020] In the display panel provided in the second aspect, since the reflective layer can reflect light, part of the light emitted by the light-emitting device that is directed toward the black matrix can be reflected by the reflective layer, and then can be reflected back into the sub-pixel and emitted to the display surface side of the display panel. In this way, the light extraction efficiency of the display panel can be improved.

[0021] In a third aspect, a display device is provided, comprising the display panel provided by any one of the above embodiments.

[0022] It can be understood that the display device provided in the third aspect includes the above-mentioned display panel. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the display panel above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a structural diagram of a display device according to some embodiments;

[0025] Figure 2 is a structural diagram of a display panel according to some embodiments;

[0026] Figure 3 for Figure 2 A cross-sectional view of the display panel along section line BB';

[0027] Figure 4 is a structural diagram of a light emitting device in a display panel according to some embodiments;

[0028] Figure 5 for Figure 3 A partial enlarged view of a region K1 of the display panel;

[0029] Figure 6is a structural diagram of a display panel according to some embodiments;

[0030] Figure 7 for Figure 6 A partial enlarged view of area K2 in the display panel;

[0031] Figure 8 is a structural diagram of a display panel according to some embodiments;

[0032] Fig. 9 for Figure 8 A top view of a black matrix in a display panel;

[0033] Fig.10 is a structural diagram of a display panel according to some embodiments;

[0034] Fig.11 is a structural diagram of a display panel according to some embodiments;

[0035] Fig.12 is a structural diagram of a display panel according to some embodiments;

[0036] Fig.13 is a structural diagram of a display panel according to some embodiments;

[0037] Fig.14 is a structural diagram of a display panel according to some embodiments;

[0038] Fig.15 is a structural diagram of a display panel according to some embodiments. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0040] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0041] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0042] When describing some embodiments, the term "coupled" and its derivative expressions may be used. For example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" may also refer to two or more components that are not in direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0043] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0044] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0045] The use of "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0046] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0047] As used herein, "substantially" or "approximately" includes the stated values ​​and averages that are within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0048] As used herein, "parallel" and "perpendicular" include the described situation and the situation similar to the described situation, and the range of the similar situation is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the error associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°.

[0049] It will be understood that when a layer or an element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present between the layer or element and the other layer or substrate.

[0050] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0051] Some embodiments of the present disclosure provide a display device. Figure 1 is a structural diagram of a display device according to some embodiments. Figure 1The display device 1 is a product with an image (including: static image or dynamic image, where the dynamic image can be a video) display function. For example, the display device 1 can be any one of: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query devices of e-government, banks, hospitals, power departments, etc.), a monitor, etc.

[0052] The display device 1 may include a display panel 10, and the display device 1 may further include a driving control circuit 20 coupled to the display panel 10. The driving control circuit 20 is configured to provide an electrical signal to the display panel 10. Exemplarily, the driving control circuit 20 may include: a data driving circuit 210 (also referred to as a source driver, Source Driver IC), and the data driving circuit 210 is configured to provide a data driving signal (also referred to as a data signal) to the display panel 10. The driving control circuit 20 may also include a timing control circuit 220 (also referred to as a timing controller, TimerControl Register, referred to as TCON) coupled to the data driving circuit 210, etc.

[0053] In some embodiments, the drive control circuit 20 may further include a scan drive circuit 110. In other embodiments, the scan drive circuit 110 may be integrated in the display panel 10, or in other words, the display panel 10 may include the scan drive circuit 110. Since the scan drive circuit 110 is disposed on the display panel 10, the scan drive circuit 110 may also be referred to as a GOA (Gate Driver on Array, a scan drive circuit disposed on an array substrate).

[0054] Specifically, the timing control circuit 220 can be coupled to the scan drive circuit 110, and can also be coupled to the data drive circuit 220. The timing control circuit 220 can be configured to receive a display signal, which includes, for example, a power signal, a video image signal, a communication signal (for example, a signal corresponding to the IIC communication protocol), and a mode control signal (for example, a mode control signal corresponding to the test mode, or a mode control signal corresponding to the normal display mode). Among them, the video image signal is, for example, a MIPI (Mobile Industry Processor Interface) signal, a LVDS (Low-Voltage Differential Signaling) signal. The video image signal may include: image data and a timing control signal. The image data includes, for example, pixel data of multiple sub-pixels, and the pixel data may be RGB data, etc. The timing control signal includes, for example, a data enable signal (Data Enable, which may be referred to as DE), a line synchronization signal (Hsync, which may be referred to as HS), and a field synchronization signal (Vsync, which may be referred to as VS).

[0055] The timing control circuit 220 may also be configured to output a first control signal and image data to the data driving circuit 210 and output a second control signal to the scan driving circuit 110 in response to the display signal. The first control signal is configured to control the working timing of the data driving circuit 210, and the second control signal is configured to control the working timing of the scan driving circuit 110.

[0056] The data driving circuit 210 may be configured to convert the received image data into data signals of a plurality of sub-pixels P (to be described below) in the display panel 10, and output the data signals to the pixel driving circuits M (to be described below) in the corresponding sub-pixels P according to the working sequence determined by the first control signal. The scanning driving circuit 110 is configured to output scanning signals to the pixel driving circuits M in the plurality of sub-pixels P according to the working sequence determined by the second control signal.

[0057] Some embodiments of the present disclosure further provide a display panel. The display panel can be used as a display panel in a display device provided in any of the above embodiments. Of course, the display panel can also be applied to other display devices, which is not limited by the present disclosure.

[0058] Figure 2 FIG. 1 is a structural diagram of a display panel according to some embodiments, showing the structure of a display area in the display panel. It should be noted that: Figure 2 Only the structure of the display area of ​​the display panel is shown, while the structure of the peripheral area is omitted, for example, the scan driving circuit is omitted.

[0059] See also Figure 2 The display panel 10 can be one of an OLED (Organic Light Emitting Diode) display panel, a QLED (Quantum Dot Light Emitting Diodes) display panel, and a micro LED (including: MiniLED or MicroLED, LED is a light emitting diode) display panel.

[0060] The display panel 10 has a display area AA and a peripheral area SA. The peripheral area SA may be located on at least one side (eg, one side; or all around, including upper and lower sides and left and right sides) of the display area AA.

[0061] The display panel 10 includes a plurality of sub-pixels P disposed in a display area AA. Through the light emitted by the plurality of sub-pixels P, the display panel 10 can display a predetermined image in the display area AA. Specifically, the plurality of sub-pixels P may include a plurality of sub-pixels having different luminous colors. Exemplarily, the plurality of sub-pixels P include a first sub-pixel P1, a second sub-pixel P2, and a third sub-pixel P3. The first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 respectively emit three primary color lights, for example, the first sub-pixel P1 may emit red light, the second sub-pixel P2 may emit green light, and the third sub-pixel P3 may emit blue light.

[0062] A sub-pixel P may include a light emitting device E and a pixel driving circuit M coupled to the light emitting device E.

[0063] The light emitting device E may be one of an organic light emitting diode OLED, a quantum dot light emitting diode QLED, a light emitting diode LED, and a liquid crystal light emitting device, but is not limited thereto. The embodiments of the present disclosure do not limit the type of the light emitting device, that is, the light emitting device E may be any other light emitting device (e.g., a light emitting device that emits light by discharge), as long as they can emit light so that the display panel 10 can display a picture.

[0064] The pixel driving circuit M can be configured to provide an electrical signal (such as a driving voltage or a driving current) to the light-emitting device E coupled to the pixel driving circuit M in response to the received scanning signal and data signal, so as to drive the light-emitting device E to emit light, so that the display panel 10 can display the picture.

[0065] The pixel driving circuit M may include multiple transistors and at least one (e.g., one; for example, multiple) capacitors. For example, the pixel driving circuit M may be a structure such as "2T1C", "6T1C", "7T1C", "6T2C" or "7T2C". Here, "T" represents a transistor, such as a thin film transistor. The number in front of "T" represents the number of transistors. "C" represents a capacitor, and the number in front of "C" represents the number of capacitors.

[0066] Figure 3 for Figure 2 A cross-sectional view of the display panel along section line BB'. Figure 4 for Figure 3 Structural diagram of a light-emitting device in a display panel. Figure 5 for Figure 3 A partial enlarged view of area K1 of the display panel.

[0067] See also Figure 3 , the display panel 10 may include a first substrate 110 and a second substrate 120 disposed opposite to each other. Exemplarily, along the thickness direction of the display panel 10 (e.g., parallel to the third direction Z), the first substrate 110 and the second substrate 120 may be disposed opposite to each other. The first substrate 110 and the second substrate 120 may support other structures in the display panel 10. The materials of the first substrate 110 and the second substrate 120 may include glass, PI (Polyimide), PET (Polyethylene glycol terephthalate), silicon (single crystal silicon or polycrystalline silicon), etc.

[0068] The display panel 10 further includes a light emitting device layer 130. The light emitting device layer 130 is disposed on a side of the first substrate 110 close to the second substrate 120. Exemplarily, the light emitting device layer 130 may be disposed on the first substrate 110 and located on a side of the first substrate 110 close to the second substrate 120. The light emitting device layer 130 includes a plurality of light emitting devices E. Based on this, it can also be said that the light emitting device E is disposed on the first substrate 110 and disposed on a side of the first substrate 110 close to the second substrate 120. In addition, a pixel driving circuit coupled to the light emitting device E may also be disposed on the first substrate 110 and disposed on a side of the first substrate 110 close to the second substrate 120.

[0069] See also Figure 4 In some embodiments, the light emitting device E is an organic light emitting diode. The light emitting device E may include a first electrode 131 , a second electrode 132 , and a light emitting functional layer 133 located between the first electrode 131 and the second electrode 132 .

[0070] The second electrode 132 may be disposed on a side of the first electrode 131 away from the first substrate 110. Exemplarily, along the thickness direction of the display panel 10, the first substrate 110, the first electrode 131, and the second electrode 132 may be disposed in sequence. In some embodiments, the first electrode 131 is an anode, and correspondingly, the second electrode 132 is a cathode. The second electrode 132 may be transparent or translucent. In this way, the second electrode 132 may allow the light emitted by the light-emitting functional layer 133 to be emitted through the second electrode 132. At this time, the light-emitting device E may be a top-emitting light-emitting device. The material of the second electrode 132 may include a metal or an alloy, such as a metal such as magnesium (Mg), titanium (Ti), silver (Ag), or an alloy formed by a plurality of metals. The material of the second electrode 132 may also include a metal compound, such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0071] The material of the first electrode 131 may include a metal compound, such as indium tin oxide (ITO) or indium zinc oxide (IZO). In some embodiments, the light-emitting device E is a top-emitting light-emitting device. In this case, the first electrode 131 may also include a reflective electrode. The material of the reflective electrode may be a metal or an alloy, such as a metal such as magnesium (Mg), titanium (Ti), silver (Ag), or an alloy formed by a plurality of metals. The reflective electrode may be configured to reflect light. For example, the reflective electrode may reflect light emitted from the light-emitting functional layer 133 toward the first electrode 131, so that this part of the light may also be emitted from the side of the second electrode 132, which may improve the light extraction efficiency of the display panel 10 (for example, the ratio of the light extracted outward to the total light emission of the light-emitting layer).

[0072] The light-emitting functional layer 133 may include a light-emitting layer 133a, which is, for example, an organic light-emitting layer. The light-emitting layer 133a may emit light, for example, the light-emitting layer 133a may emit red light, green light, blue light, or white light. The light-emitting functional layer 133 may also include one or more of a hole injection layer, a hole transport layer, and an electron blocking layer between the light-emitting layer 133a and the anode (e.g., the first electrode 131). The light-emitting functional layer 133 may also include one or more of an electron injection layer, an electron transport layer, and a hole blocking layer between the light-emitting layer 133a and the cathode (e.g., the second electrode 132).

[0073] See also Figure 3 and Figure 4, the light-emitting device layer 130 may include a plurality of light-emitting devices E, and accordingly, the light-emitting device layer 130 may include a first electrode layer, a second electrode layer, and a light-emitting medium layer located between the first electrode layer and the second electrode layer. Among them, the first electrode layer includes at least one (for example, one; for example, multiple) first electrode 131, the second electrode layer includes at least one (for example, one; for example, multiple) second electrode 132, and the light-emitting medium layer includes at least one (for example, one; for example, multiple) light-emitting functional layer 133. In some embodiments, the second electrodes 132 in the plurality of light-emitting devices E may contact each other. Exemplarily, the second electrode layer may be a continuous film layer extending in a direction perpendicular to the thickness direction of the display panel (for example, parallel to the XY plane, the XY plane is a plane determined by the first direction X and the second direction Y, the first direction X and the second direction Y are perpendicular to the third direction Z, and the first direction X and the second direction Y intersect). Similarly, the light-emitting functional layers 133 in the plurality of light-emitting devices E may also contact each other. Exemplarily, the light-emitting medium layer may be a continuous film layer extending in a direction perpendicular to the thickness direction of the display panel.

[0074] Continue to see Figure 3 The display panel 10 further includes a black matrix BM. The black matrix BM is disposed on a side of the second substrate 120 close to the first substrate 110. For example, along the thickness direction of the display panel 10, the first substrate 110, the black matrix BM and the second substrate 120 may be disposed in sequence. In some possible implementations, the black matrix BM is disposed on the second substrate 120 and is located on a side of the second substrate 120 close to the first substrate 110.

[0075] The black matrix BM can be configured to block light. The material of the black matrix BM can absorb light, so the black matrix BM can play a role in shielding light. In some possible implementations, the material of the black matrix BM may include resin and black pigment, and the resin is, for example, acrylic resin. The material of the black matrix BM may also include metals, such as chromium (Cr), etc. In some embodiments, as described above, the pixel driving circuit may be disposed on the first substrate 110, and the orthographic projection of the black matrix BM on the first substrate 110 may overlap with at least a portion (e.g., part; for example, all) of the orthographic projection of the pixel driving circuit on the first substrate 110, so that the light reflection caused by the external light irradiating the pixel driving circuit can be reduced, and the display effect of the display panel 10 can be improved. In addition, the orthographic projection of the black matrix BM on the first substrate 110 may overlap with the orthographic projection of the transistor (e.g., a thin film transistor) in the pixel driving circuit on the first substrate 110, so that the problem of leakage current in the transistor caused by the external light irradiating the semiconductor layer of the transistor (the material of the semiconductor layer, for example, includes silicon) can be improved.

[0076] The black matrix BM has a plurality of openings H. The openings H penetrate the black matrix BM, that is, no black matrix material is disposed in the openings H. An opening H is directly opposite to a light-emitting device E. Exemplarily, at least a portion (e.g., part; or, for example, all) of an orthographic projection of a light-emitting device E on the film layer where the black matrix BM is located overlaps with an opening H. Since an opening H is directly opposite to a light-emitting device E, light emitted by the light-emitting device E can be emitted through the opening H. Exemplarily, an opening H can be disposed in a sub-pixel P, and light emitted by the light-emitting device E disposed in the sub-pixel P can be emitted through the opening H, so that the sub-pixel P can emit light.

[0077] The display panel 10 may include at least one (for example, one; for example, multiple) color filter F. The color filter F may be disposed in the opening H. One color filter F may be disposed in one opening H. Accordingly, one color filter F may be disposed in one sub-pixel P.

[0078] The color filter F can be configured to allow light of a specific wavelength range to pass through, or in other words, the color filter F can be configured to allow light of a certain color to pass through, so that the sub-pixel P can emit light of the corresponding color. Exemplarily, the multiple color filters F include a first color filter F1, a second color filter F2, and a third color filter F3. The first color filter F1 can allow light of a first color to pass through, the second color filter F2 can allow light of a second color to pass through, and the third color filter F3 can allow light of a third color to pass through. The first color, the second color, and the third color can be three primary colors, for example, the first color is red, the second color is green, and the third color is blue.

[0079] Furthermore, since the color filters F are disposed in the openings H of the black matrix BM, the black matrix BM can be configured to prevent light transmitted through adjacent color filters F from mixing with each other, thereby improving the resolution of the display panel 10 and also improving the display effect of the display panel 10 .

[0080] Continue to see Figure 3 The display panel 10 further includes a low refractive index layer 140. The low refractive index layer 140 is disposed on the inner wall H' of the opening H. Specifically, the low refractive index layer 140 may be disposed on at least a portion (eg, part; or all) of the inner wall H' of the opening H.

[0081] The low refractive index layer 140 is transparent. In this article, the film layer is transparent, which may mean that the film layer can transmit light, that is, light can pass through the film layer and emit. The material of the low refractive index layer 140 may include one or more of the following materials: polyoxymethylene, polyimide, polyethylene terephthalate, and acrylate, etc.

[0082] In some possible implementations, the refractive index of the low refractive index layer 140 is less than or equal to 1.5, for example, 1.0, 1.1, 1.2, 1.3, 1.4, or 1.5.

[0083] Continue to see Figure 3 The display panel 10 further includes at least one (e.g., one; or, for example, multiple) first embedded portion 150. A first embedded portion 150 (e.g., each first embedded portion 150) is located in an opening H and contacts a side surface 140' of the low refractive index layer 140. The side surface 140' of the low refractive index layer 140 is a surface of the low refractive index layer 140 away from the inner wall H' of the opening H.

[0084] Further, the refractive index of the low refractive index layer 140 is lower than the refractive index of the first embedding part 150 .

[0085] See also Figure 5 , since the first embedded portion 150 is in contact with the side surface 140' of the low refractive index layer 140, and the refractive index of the low refractive index layer 140 is less than the refractive index of the first embedded portion 150, when the light ray i (for example, the light ray emitted by the light emitting device E) passes through the first embedded portion 150 having a higher refractive index and collides with the low refractive index layer 140 having a lower refractive index at an incident angle D greater than the critical angle, the light ray i may be totally reflected. The incident angle D of the light ray i may be the angle between the direction of the light ray i and the fourth direction V, and the fourth direction V is perpendicular to the side surface 140' of the low refractive index layer 140. The refractive index of the first embedded portion 150 is recorded as n1, and the refractive index of the low refractive index layer 140 is recorded as n2. According to the principle of total optical reflection, the critical angle = arcsin (n2 / n1).

[0086] When there is no low refractive index layer on the inner wall of the opening of the black matrix, referring to the above description of the black matrix, part of the light emitted by the light emitting device that hits the black matrix will be absorbed by the black matrix. In the display panel provided in the embodiment of the present disclosure, referring to the above description, part of the light emitted by the light emitting device E that hits the black matrix BM can be totally reflected, and then can be reflected back into the sub-pixel and can be emitted to the display surface 10a side of the display panel. Based on this, the light extraction efficiency of the display panel provided in the embodiment of the present disclosure can be improved.

[0087] Continue to see Figure 3 In some embodiments, the first embedded portion 150 is a color filter F. That is, the color filter F is located in the opening H and contacts the side surface 140 ′ of the low refractive index layer 140 . Moreover, the refractive index of the color filter F is greater than the refractive index of the low refractive index layer 140 .

[0088] Referring to the above description, for the part of the light emitted by the light-emitting device E that is emitted toward the black matrix BM, this part of the light can be emitted from the color filter F with a higher refractive index to the low refractive index layer 140 with a lower refractive index at an incident angle greater than the critical angle, and undergo total reflection at the interface between the low refractive index layer 140 and the color filter F, and then can be reflected back into the sub-pixel P and emitted to the display surface 10a side of the display panel 10. In this way, the light extraction efficiency of the display panel 10 can be improved.

[0089] In some embodiments, the refractive index of the color filter F is 1.0-2.0, for example, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.0.

[0090] In some possible implementations, the difference between the refractive index of the color filter F1 and the refractive index of the low refractive index layer 140 is greater than or equal to 0.1. For example, the difference between the refractive index of the color filter F1 and the refractive index of the low refractive index layer 140 is greater than or equal to 0.3. The difference between the refractive index of the color filter F1 and the refractive index of the low refractive index layer 140 is, for example, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95 or 1.0. Since there is a certain difference between the refractive index of the color filter F and the refractive index of the low refractive index layer 140, the critical angle for total reflection of light at the interface between the low refractive index layer 140 and the color filter F can be smaller, so that more light can be totally reflected and reflected back to the sub-pixel P, which can further improve the light extraction efficiency of the display panel 10.

[0091] Continue to see Figure 3 In some embodiments, the display panel 10 further includes a first glue layer 160. The first glue layer 160 is disposed between the black matrix BM and the light emitting device layer 130. Exemplarily, along the thickness direction of the display panel 10, the black matrix BM, the first glue layer 160 and the light emitting device layer 130 may be disposed in sequence.

[0092] The material of the first adhesive layer 160 may be viscous, and thus the first adhesive layer 160 may be configured to bond the first substrate 110 and the second substrate 120 together to improve the structural stability of the display panel 10. The material of the first adhesive layer 160 may be, for example, epoxy organic material, epoxy-acrylic organic material, or the like.

[0093] The first adhesive layer 160 includes a second embedding portion 161 embedded in the opening H. Exemplarily, the first adhesive layer 160 may include a plurality of second embedding portions 161 , and one second embedding portion 161 may be embedded in one opening H.

[0094] Since the first glue layer 160 includes the second embedded portion 161 embedded in the opening H, the first glue layer 160 can also be disposed between the color filter F and the light-emitting device layer 130. Exemplarily, the color filter F, the first glue layer 160, and the light-emitting device layer 130 can be disposed sequentially along the thickness direction of the display panel 10. In some possible implementations, the first glue layer 160 is a continuous film layer extending in a direction perpendicular to the thickness direction of the display panel.

[0095] Further, a second embedded portion 161 (for example, each second embedded portion 161) contacts the side surface 140' of the low refractive index layer 140. Moreover, the refractive index of the low refractive index layer 140 is less than the refractive index of the second embedded portion 161. Similar to the first embedded portion 150, since the second embedded portion 161 contacts the side surface 140' of the low refractive index layer 140, and the refractive index of the low refractive index layer 140 is less than the refractive index of the second embedded portion 161, for part of the light emitted by the light emitting device E that is emitted toward the black matrix BM, the part of the light can be emitted from the second embedded portion 161 with a higher refractive index to the low refractive index layer 140 with a lower refractive index at an incident angle greater than the critical angle, and is totally reflected at the interface between the low refractive index layer 140 and the second embedded portion 161, and can be reflected back to the sub-pixel P, and emitted to the display surface 10a side of the display panel 10, so that the light extraction efficiency of the display panel 10 can be improved.

[0096] In some possible implementations, the refractive index of the first adhesive layer 160 is greater than or equal to 1.5, for example, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0. The refractive index of the second embedded portion 161 may be the same as or different from the refractive index of the first adhesive layer 160. Exemplarily, the refractive index of the second embedded portion 161 is greater than or equal to 1.5, for example, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0.

[0097] Figure 6 is a structural diagram of a display panel according to some embodiments. Figure 7 for Figure 6 A partial enlarged view of area K2 in the display panel.

[0098] See also Figure 6 In some embodiments, the display panel 10 further includes at least one (e.g., one; for example, multiple) water absorption layer 170. A water absorption layer 170 (e.g., each water absorption layer 170) is disposed on a side of the color filter F away from the second substrate 120. Exemplarily, along the thickness direction of the display panel 10, the water absorption layer 170, the color filter F, and the second substrate 120 may be disposed in sequence.

[0099] The material of the water absorbing layer 170 may include a water absorbing material. Exemplarily, the material of the water absorbing layer 170 may include a water absorbing material. After the first substrate 110 and the second substrate 120 are boxed, the water absorbing material may be induced by ultraviolet light (UV) or by heating, so that the water absorbing layer 170 has water absorbing properties. Exemplarily, the material of the water absorbing layer 170 includes a substrate and a water absorbing material dispersed in the substrate, wherein the material of the substrate includes, for example, epoxy resin or polymethyl methacrylate (also referred to as acrylic material), etc., and the water absorbing material includes, for example, a metal oxide, and the metal oxide is, for example, calcium oxide.

[0100] A water absorption layer 170 (eg, each water absorption layer 170 ) contacts the color filter F. In this way, the water absorption layer 170 can be configured to absorb water vapor in the color filter F, which can improve the structural stability of the display panel 10 and improve the reliability level of the display panel 10 .

[0101] See also Figure 7 In some embodiments, the thickness d1 of the color filter F is smaller than the depth d2 of the opening H. The thickness d1 of the color filter F is, for example, the size of the color filter F along the third direction Z (for example, the average size), and the depth d2 of the opening H is, for example, the size of the opening H along the third direction Z (for example, the average size; for example, the minimum size). Exemplarily, the average size of the color filter F along the third direction Z is smaller than the average size of the opening H along the third direction Z. Again exemplarily, the average size of the color filter F along the third direction Z is smaller than the minimum size of the opening H along the third direction Z.

[0102] Exemplarily, the thickness d1 of the color filter F may be 0-3 μm, for example, 0.5 μm, 1.0 μm, 1.5 μm, 2.0 μm, 2.5 μm, 3.0 μm. The depth d2 of the opening H (which may also be the thickness of the black matrix BM) may be 1 μm-5 μm, for example, 1.0 μm, 1.5 μm, 2.0 μm, 2.5 μm, 3.0 μm, 3.5 μm, 4.0 μm, 4.5 μm, 5.0 μm.

[0103] As described above, the water absorption layer 170 is disposed on the side of the color filter F away from the second substrate 120. Further, since the thickness d1 of the color filter F is less than the depth d2 of the opening H, the water absorption layer 170 can be disposed in the opening H. In some possible implementations, the manufacturing process of the water absorption layer 170 is: filling the opening H with a filling liquid by an inkjet printing process (Ink Jet Printing, which can be referred to as IJP), a spin coating process or a drop filling process (One Drop Filling, which can be referred to as ODF), and curing the filling liquid by a curing process to form the water absorption layer 170. Since the thickness d1 of the color filter F is less than the depth d2 of the opening H, the filling liquid can be filled in the opening H to form the water absorption layer 170 disposed in the opening H. In this way, the manufacturing process of the water absorption layer 170 is relatively simple, and the thickness of the display panel 10 (for example, the size of the display panel 10 along the third direction Z) can be reduced.

[0104] Figure 8 is a structural diagram of a display panel according to some other embodiments. Fig. 9 for Figure 8 FIG. 1 is a top view of the black matrix in the display panel, showing the structure of the black matrix.

[0105] See also Figure 8 and Fig. 9 In some embodiments, the thickness d1 of the color filter F is less than the depth d2 of the opening H. In addition, the black matrix BM includes a closed light shielding ring R and a light shielding net N surrounded by the light shielding ring R, and the light shielding ring R and the light shielding net N form a plurality of openings H of the black matrix BM.

[0106] The closed light-shielding ring R is a closed ring connected end to end. The embodiments of the present disclosure do not limit the specific shape of the light-shielding ring R. For example, the shape of the light-shielding ring R can be circular, elliptical or polygonal, and the polygon can be, for example, rectangular, square or hexagonal; the shape of the light-shielding ring R can also be irregular.

[0107] Further, the thickness d3 of the shading ring R is greater than the thickness d4 of the shading net N. The thickness d3 of the shading ring R may be the size (e.g., average size) of the shading ring R along the third direction Z, and the thickness d4 of the shading net N may be, for example, the size (e.g., average size) of the shading net N along the third direction Z. Exemplarily, the average size of the shading ring R along the third direction Z is greater than the average size of the shading net N along the third direction Z.

[0108] Based on this, referring to the above description, in the manufacturing process of the water absorption layer 170, the filling liquid can cover the light shielding net N and extend into the plurality of openings H, so that the water absorption layer 170 can cover the light shielding net N and extend into the plurality of openings H. In this way, the area of ​​the water absorption layer 170 can be larger, which can further improve the structural stability of the display panel 10 and further enhance the reliability level of the display panel 10.

[0109] See also Figure 6 and Figure 8 In some embodiments, a water absorbing layer 170 (for example, each water absorbing layer 170) is in contact with the side surface 140' of the low refractive index layer 140, and the refractive index of the low refractive index layer 140 is less than the refractive index of the water absorbing layer 170. Referring to the above description, for part of the light emitted by the light emitting device E that is emitted toward the black matrix BM, the part of the light can be emitted from the water absorbing layer 170 with a higher refractive index to the low refractive index layer 140 with a lower refractive index at an incident angle greater than the critical angle, and is totally reflected at the interface between the low refractive index layer 140 and the water absorbing layer 170, and can then be reflected back into the sub-pixel and emitted to the display surface 10a side of the display panel 10, so that the light extraction efficiency of the display panel 10 can be improved.

[0110] In some possible implementations, the refractive index of the water absorbing layer 170 is equal to the refractive index of the color filter F. In addition, the refractive index of the low refractive index layer 140 is smaller than the refractive index of the water absorbing layer 170 and smaller than the refractive index of the color filter F. In this way, referring to the above description, light can be totally reflected at the interface between the low refractive index layer 140 and the water absorbing layer 170 and at the interface between the low refractive index layer 140 and the color filter F, which can further improve the light extraction efficiency of the display panel 10.

[0111] Fig.10 is a structural diagram of a display panel according to some embodiments. Fig.10 In some embodiments, the display panel 10 further includes a second glue layer 180. The second glue layer 180 is disposed between the black matrix BM and the light emitting device layer 130. Exemplarily, along the thickness direction of the display panel 10, the black matrix BM, the second glue layer 180 and the light emitting device layer 130 may be disposed in sequence.

[0112] The material of the second adhesive layer 180 may be viscous, and thus the second adhesive layer 180 may be configured to bond the first substrate 110 and the second substrate 120. The material of the second adhesive layer 180 may be the same as that of the first adhesive layer, and the above description may be referred to, and will not be repeated here.

[0113] The second glue layer 180 is integrated with one or more first embedded parts 150. Exemplarily, the material of a first embedded part 150 (e.g., each first embedded part 150) is the same as the material of the second glue layer 180, and there is no interface between the first embedded part 150 and the second glue layer 180. In some possible implementations, the first embedded part 150 and the second glue layer 180 can be made in the same process. For example, an initial glue layer can be coated on the first substrate 110 with the light-emitting device layer 130, and the second substrate 120 with the black matrix BM is matched with the first substrate 110 with the initial glue layer and the light-emitting device layer 130. In this way, a part of the initial glue layer can be embedded in the opening H to form the first embedded part 150, and another part of the initial glue layer can form the second glue layer 180.

[0114] Since the second adhesive layer 180 is integrated with the first embedding portion 150 , the refractive index of the second adhesive layer 180 may be greater than the refractive index of the low refractive index layer 140 .

[0115] Continue to see Fig.10 Further, in some embodiments, the display panel 10 may further include a color filter F. The color filter F may be disposed on a side of the first embedded portion 150 close to the second substrate 120. For example, along the thickness direction of the display panel 10, the first embedded portion 150, the color filter F and the second substrate 120 may be disposed in sequence. In some possible implementations, the refractive index of the color filter F may be less than or equal to the refractive index of the low refractive index layer 140. For example, the material of the low refractive index layer 140 in an opening H may be the same as the material of the color filter F in the opening H. In other possible implementations, the refractive index of the color filter F may be greater than the refractive index of the low refractive index layer 140. In other embodiments, there may be no color filter in an opening H (for example, one opening H; for example, each opening H) of the black matrix.

[0116] In some possible implementations, the display panel 10 may further include a water absorbing layer (not shown in the figure). The material and structure of the water absorbing layer can refer to the above related descriptions and will not be repeated here. The water absorbing layer may be disposed between the first embedding portion 150 and the color filter F.

[0117] Fig.11 is a structural diagram of a display panel according to some embodiments. Fig.11In some embodiments, the opening H has a first edge HE1 and a second edge HE2. The first edge HE1 is farther away from the second substrate 120 than the second edge HE2. Moreover, the orthographic projection of the second edge HE2 on the second substrate 120 is located inside the orthographic projection of the first edge HE1 on the second substrate 120. In this way, the opening H may be trumpet-shaped, and its larger end is closer to the light-emitting device layer 130. In other words, the side wall H' of the opening H may be arranged toward the light-emitting device layer 130. Exemplarily, in a cross section of the opening H determined by a plane parallel to the thickness direction of the display panel 10 (e.g., an XZ plane, where the XZ plane is a plane determined by the first direction X and the third direction Z), the angle between the contour line HF of the side wall H' of the opening H and the second substrate 120 exposed by the opening H is an obtuse angle. In this way, more light can be directed toward the side wall H' of the opening H, and then undergo total reflection and be emitted to the side of the display surface 10a of the display panel 10, thereby improving the light extraction efficiency of the display panel 10.

[0118] In addition, in the display panel provided by the embodiment of the present disclosure, the low refractive index layer 140 is arranged on the inner wall H' of the opening H, and exposes the surface BM' of the black matrix BM away from the second substrate 120. When the low refractive index layer 140 is arranged on the surface BM' of the black matrix BM away from the second substrate 120, referring to the above description, the light emitted by the light-emitting functional layer 130 can be totally reflected and reflected back to the side of the second substrate 120 away from the display surface 10a. This may cause problems such as light crosstalk. Based on this, since the low refractive index layer 140 exposes the surface BM' of the black matrix BM away from the second substrate 120, the above problems can be improved and the display effect of the display panel 10 can be improved.

[0119] Fig.12 is a structural diagram of a display panel according to some embodiments. Fig.12 In some embodiments, the black matrix BM includes a first portion BMa and a second portion BMb, and the first portion BMa is disposed on a side of the second portion BMb away from the second substrate 120. For example, along the thickness direction of the display panel 10, the first portion BMa of the black matrix, the second portion BMb of the black matrix, and the second substrate 120 may be disposed in sequence. In some possible implementations, the first portion BMa contacts the second portion BMb.

[0120] Further, the orthographic projection of the first portion BMa on the second substrate 120 is located inside the orthographic projection of the second portion BMb on the second substrate 120. Exemplarily, for a surface Fa of the first portion BMa close to the second portion BMb, its edge is retracted (e.g., retracted along the XY plane) compared to an edge of a surface Fb of the second portion BMb close to the first portion BMa.

[0121] Further, the low refractive index layer 140 is disposed on the side wall BMa' of the first part BMa, and the low refractive index layer 140 exposes the side wall BMb' of the second part BMb. Specifically, the low refractive index layer 140 may expose part or all of the side wall BMb' of the second part BMb. It should be noted that the side wall BMa' of the first part BMa is, for example, a surface of the first part BMa distributed in a direction perpendicular to the thickness direction of the display panel. Similarly, the side wall BMb' of the second part BMb is, for example, a surface of the second part BMb distributed in a direction perpendicular to the thickness direction of the display panel. Since the low refractive index layer 140 is disposed on the side wall BMa' of the first part BMa and exposes the side wall BMb' of the second part BMb, among the light emitted by the light emitting device layer 130, the light whose emission direction has a large angle with the thickness direction of the display panel 10 (for example, light o) can be irradiated on the second part BMb of the black matrix BM, and then absorbed by the second part BMb and cannot be emitted. In this way, on the basis of improving the light extraction efficiency of the display panel 10 by utilizing the total reflection phenomenon, the lateral light output amount can be further reduced, which can play a role in lateral peeping protection and improve the display effect of the display panel.

[0122] In some possible implementations, the orthographic projection of the low refractive index layer 140 on the second substrate 120 is located inside the orthographic projection of the second portion BMb of the black matrix on the second substrate 120. In this way, the low refractive index layer 140 can expose the entire side wall BMb' of the second portion BMb, or a portion of the surface of the second portion BMb away from the second substrate 120. In this way, more light can be irradiated on the second portion BMb of the black matrix BM and then absorbed by the second portion BMb of the black matrix BM, which can further reduce the amount of lateral light emission, play a role in lateral peeping protection, and improve the display effect of the display panel.

[0123] In some possible implementations, the first part BMa of the black matrix BM has a plurality of first sub-openings MH1, the second part BMb of the black matrix BM has a plurality of second sub-openings MH2, and a first sub-opening MH1 (for example, each first sub-opening MH1) is directly opposite to a second sub-opening MH2. A first sub-opening MH1 has a third edge HE3 and a fourth edge HE4, and the third edge HE3 is farther away from the second substrate 120 than the fourth edge HE4. Moreover, the orthographic projection of the fourth edge HE4 on the second substrate 120 is located inside the orthographic projection of the third edge HE3 on the second substrate 120. In this way, the side wall of the first sub-opening MH1, that is, the side wall BMa' of the first part BMa of the black matrix BM, can be arranged toward the light-emitting device layer 130. For specific descriptions and beneficial effects, reference can be made to the above descriptions of the first edge HE1 and the second edge HE2 of the opening H, which will not be repeated here.

[0124] Fig.13 is a structural diagram of a display panel according to some embodiments. Fig.13 In some embodiments, the display panel 10 further includes a lens layer 190. The lens layer 190 is disposed on a side of the second substrate 120 away from the first substrate 110. For example, along the thickness direction of the display panel 10, the first substrate 110, the second substrate 120 and the lens layer 190 may be disposed in sequence.

[0125] Specifically, the lens layer 190 includes at least one (e.g., one; for example, multiple) lens 191, and an opening H (e.g., each opening H) is directly opposite to at least one (e.g., one; for example, multiple) lens 191. The shape of a lens 191 (e.g., each lens 191) can be hemispherical or ellipsoidal, etc., or can be other shapes, and the embodiments of the present disclosure are not limited to this. The refractive index of a lens 191 (e.g., each lens 191) is 1.0 to 1.5, for example, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5. In some possible implementations, the refractive index of a lens 191 is substantially the same as the refractive index of glass.

[0126] The lens layer 190 can play a role in focusing light. By arranging the lens layer on the side of the second substrate 120 away from the first substrate 110, the amount of light emitted in the forward direction (i.e., parallel to the thickness direction of the display panel) of the display panel 10 can be increased, or in other words, the forward light extraction efficiency of the display panel 10 can be improved. In addition, the lens layer 190 can also increase the external scattering of light toward the second substrate 120 to suppress the total reflection at the interface between the second substrate 120 and the air, which can further improve the light extraction efficiency of the display panel 10.

[0127] Continue to see Fig.11 , the display panel 10 may further include a passivation layer PL. The passivation layer PL may be disposed on a side of the light emitting device layer 130 away from the first substrate 110. Exemplarily, along the thickness direction of the display panel 10, the first substrate 110, the light emitting device layer 130 and the passivation layer PL may be disposed in sequence. The material of the passivation layer PL may include an inorganic material, such as SiO2 and / or Al2O3; it may also include an organic material. The passivation layer PL may be configured as an encapsulation layer of the light emitting device E. Specifically, the passivation layer PL may cover the light emitting device layer 130, that is, it may cover each light emitting device E, so as to protect the light emitting device E and improve the corrosion of the light emitting device E by water vapor and oxygen.

[0128] In some possible implementations, the refractive index of the passivation layer PL is less than the refractive index of the first glue layer 160 or the second glue layer 180. In this way, the total reflection of light at the interface between the passivation layer PL and the first glue layer 160 or the second glue layer 180 can be reduced, and the light extraction efficiency of the display panel 10 can be improved. In other possible implementations, the refractive index of the first glue layer 160 or the second glue layer 180 is less than or equal to the refractive index of the passivation layer PL.

[0129] Continue to see Fig.11 The display panel 10 may further include a sealing frame D. The sealing frame D may be disposed between the first substrate 110 and the second substrate 120, and the sealing frame D may be disposed around the first adhesive layer 160 or the second adhesive layer 180 (e.g., around the XY plane). The sealing frame D may be configured to bond the first substrate 110 and the second substrate 120 together, and may improve the problem of moisture and oxygen entering the display panel 10 and corroding the display panel 10.

[0130] Some embodiments of the present disclosure further provide a display panel, which can be used as a display panel in a display device provided in any of the above embodiments.

[0131] Fig.14 is a structural diagram of a display panel according to some embodiments. Fig.15 is a structural diagram of a display panel according to some embodiments.

[0132] See also Fig.14 It should be noted that Fig.14 The display panel 30 and Figure 3 to Figure 13 The difference between the display panel 10 in FIG. 1 and FIG. 2 is that: Figure 3 to Figure 13 The display panel 10 in the embodiment includes a low refractive index layer 140 disposed on the inner wall H' of the opening H of the black matrix BM, and Fig.14 The display panel 30 in the embodiment includes a reflective layer 310 disposed on the inner wall H' of the opening H of the black matrix BM. The remaining structures in the display panel 30 can be the same as those in the embodiment of the present invention. Figure 3 to Figure 13 The corresponding structure in the display panel 10 is the same, and reference may be made to the above description of the display panel 10, which will not be repeated here.

[0133] Specifically, see Fig.14The display panel 30 includes a first substrate 110 and a second substrate 120 that are arranged opposite to each other. The display panel 30 also includes a light-emitting device layer 130, which is arranged on a side of the first substrate 110 close to the second substrate 120. The light-emitting device layer 130 includes a plurality of light-emitting devices E. The display panel 30 also includes a black matrix BM, which is arranged on a side of the second substrate 120 close to the first substrate 110 and has a plurality of openings H, and an opening H is directly opposite to a light-emitting device E. The display panel 30 also includes a reflective layer 310, which is arranged on an inner wall H' of the opening H. Specifically, the position of the reflective layer 310 in the display panel 30 can be the same as the position of the low refractive index layer in the display panel, and reference can be made to the above description, which will not be repeated here.

[0134] The reflective layer 310 may reflect light. For example, the reflective layer 310 may be made of a metal material, such as magnesium (Mg), silver (Ag), or the like.

[0135] Since the reflective layer 310 can reflect light, part of the light emitted by the light-emitting device E that is directed toward the black matrix BM (for example, light w) can be reflected by the reflective layer 310, and then reflected back into the sub-pixel P, and emitted to the display surface 30a side of the display panel 30, so that the light extraction efficiency of the display panel 30 can be improved.

[0136] See also Fig.15 In some embodiments, the display panel 30 further includes a water absorption layer 170. The water absorption layer 170 may be disposed between the black matrix BM and the light emitting device layer 130. The structure, position, material and beneficial effects of the water absorption layer 170 may refer to the above related descriptions and will not be described in detail here.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that: include: A first substrate and a second substrate arranged opposite to each other; a light emitting device layer, arranged on a side of the first substrate close to the second substrate, and comprising a plurality of light emitting devices; A black matrix is ​​arranged on a side of the second substrate close to the first substrate and has a plurality of openings, one of the openings being directly opposite to a light emitting device; A low refractive index layer is arranged on the inner wall of the opening; a first adhesive layer, disposed between the black matrix and the light-emitting device layer, configured to bond the first substrate and the second substrate together, the first adhesive layer comprising a second embedded portion embedded in the opening, the second embedded portion contacting a side surface of the low refractive index layer; a color filter, the color filter being located in the opening and in contact with a side surface of the low refractive index layer, wherein the side surface of the low refractive index layer is a surface of the low refractive index layer away from an inner wall of the opening; The refractive index of the low refractive index layer is lower than the refractive index of the color filter and lower than the refractive index of the second embedding portion.

2. The display panel according to claim 1, characterized in that: Also includes: The water absorbing layer is arranged on a side of the color filter away from the second substrate and is in contact with the color filter.

3. The display panel according to claim 2, characterized in that: The thickness of the color filter is smaller than the depth of the opening; The water absorbing layer is disposed in the opening.

4. The display panel according to claim 2, characterized in that: The thickness of the color filter is smaller than the depth of the opening; The black matrix includes a closed light-shielding ring and a light-shielding net surrounded by the light-shielding ring, and the light-shielding ring and the light-shielding net form the plurality of openings; The thickness of the light-shielding ring is greater than the thickness of the light-shielding net, and the water-absorbing layer covers the light-shielding net and extends into the plurality of openings.

5. The display panel according to any one of claims 2 to 4, characterized in that: The water absorbing layer is in contact with a side surface of the low refractive index layer, and the refractive index of the low refractive index layer is lower than that of the water absorbing layer.

6. The display panel according to claim 1, characterized in that: Also includes: The second adhesive layer is disposed between the black matrix and the light-emitting device layer, and is configured to bond the first substrate and the second substrate together, and the second adhesive layer is integrated with the color filter.

7. The display panel according to claim 1, characterized in that: The black matrix comprises a first part and a second part, the first part is arranged on a side of the second part away from the second substrate, and an orthographic projection of the first part on the second substrate is located inside an orthographic projection of the second part on the second substrate; The low refractive index layer is disposed on the side wall of the first portion and exposes the side wall of the second portion.

8. The display panel according to claim 1, characterized in that: The opening has a first edge and a second edge, the first edge is farther away from the second substrate than the second edge, and an orthographic projection of the second edge on the second substrate is located inside an orthographic projection of the first edge on the second substrate.

9. The display panel according to claim 1, characterized in that: Also includes: The lens layer is arranged on a side of the second substrate away from the first substrate, the lens layer includes at least one lens, and the opening is directly opposite to the at least one lens.

10. The display panel according to claim 1, characterized in that: Also includes: The reflective layer is arranged on the inner wall of the opening.

11. The display panel according to claim 10, characterized in that: Also includes: The water absorption layer is arranged between the black matrix and the light emitting device layer.

12. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 11.

Images