Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate, a light-emitting device layer and a light-absorbing layer. The light-emitting device layer is arranged on one side of the substrate, and comprises a plurality of light-emitting units. The light-absorbing layer is arranged on the side of the light-emitting device layer away from the substrate, and is provided with a plurality of light-transmitting holes penetrating through the light-absorbing layer along the thickness direction of the substrate. The plurality of light-emitting units comprises at least two first type light-emitting units. The orthographic projection of the first type light-emitting units on the substrate at least partially overlaps with the orthographic projection of the light-transmitting holes on the substrate. The first type light-emitting units have a first emission wavelength range. The light-absorbing layer has a first absorption wavelength range. The first absorption wavelength range at least partially overlaps with the first emission wavelength range. In the embodiment of the application, the light-absorbing layer can absorb part of ambient light with the same color as the first type light-emitting units, thereby reducing the reflection effect of the ambient light.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] With the development of display technology, consumers have placed more stringent demands on display devices, requiring them to deliver better display effects to meet these needs. However, current display panels still suffer from glare issues, negatively impacting the user experience. Summary of the Invention

[0003] This application provides a display panel and display device that can reduce the reflection problem of ambient light.

[0004] In a first aspect, embodiments of this application provide a display panel, including a substrate, a light-emitting device layer, and a light-absorbing layer. The light-emitting device layer is disposed on one side of the substrate and includes a plurality of light-emitting units. The light-absorbing layer is disposed on the side of the light-emitting device layer opposite to the substrate and has a plurality of light-transmitting holes penetrating the light-absorbing layer along the thickness direction of the substrate.

[0005] The plurality of light-emitting units include at least two first-type light-emitting units, the orthographic projection of the first-type light-emitting units on the substrate and the orthographic projection of the light-transmitting aperture on the substrate at least partially overlap, the first-type light-emitting units have a first emission wavelength range, the light-absorbing layer has a first absorption wavelength range, and the first absorption wavelength range and the first emission wavelength range at least partially overlap.

[0006] In some embodiments, the plurality of light-emitting units further includes at least two second-type light-emitting units, wherein the orthographic projection of the second-type light-emitting units onto the substrate at least partially overlaps with the orthographic projection of the light-absorbing layer onto the substrate;

[0007] The light-absorbing layer has a first transmission wavelength range, and the second type of light-emitting unit has a second emission wavelength range, wherein the first transmission wavelength range and the second emission wavelength range at least partially overlap.

[0008] In some embodiments, the second emission wavelength range is within the first transmission wavelength range.

[0009] In some embodiments, the orthographic projection of the second type of light-emitting unit onto the substrate lies within the orthographic projection of the light-absorbing layer onto the substrate.

[0010] In some embodiments, at least two second-type light-emitting units include light-emitting units of at least two different colors.

[0011] In some embodiments, the first type of light-emitting unit and the second type of light-emitting unit emit different colors, and at least two first type of light-emitting units are light-emitting units of the same color.

[0012] In some embodiments, at least two second-type light-emitting units include a green light-emitting unit and a red light-emitting unit, the first-type light-emitting unit includes a blue light-emitting unit, and the light-absorbing layer includes a yellow color resist.

[0013] In some embodiments, at least two first-class light-emitting units include light-emitting units of at least two different colors.

[0014] In some embodiments, the first type of light-emitting unit and the second type of light-emitting unit emit different colors, and at least two second type of light-emitting units are light-emitting units of the same color.

[0015] In some embodiments, at least two first-type light-emitting units include a green light-emitting unit and a red light-emitting unit, the second-type light-emitting unit includes a blue light-emitting unit, and the light-absorbing layer includes a blue color resist.

[0016] In some embodiments, the orthographic projection of the first type of light-emitting unit onto the substrate lies within the orthographic projection of the light-transmitting hole onto the substrate.

[0017] In some embodiments, the distance D1 between the edge of the light-transmitting aperture projected onto the substrate and the edge of the first type of light-emitting unit projected onto the substrate is greater than or equal to 5 μm.

[0018] In some embodiments, the center of the first type of light-emitting unit in the orthographic projection of the substrate coincides with the center of the light-transmitting hole in the orthographic projection of the substrate.

[0019] In some embodiments, the display panel further includes a brightness enhancement layer, which includes a polarizer disposed on the side of the light absorption layer away from the substrate, and a chiral liquid crystal layer disposed between the polarizer and the light absorption layer.

[0020] In some embodiments, the brightening functional layer is used to brighten the light emitted by the first type of light-emitting unit.

[0021] In some embodiments, the light-absorbing layer is a monochromatic colored resist layer.

[0022] In some embodiments, the display panel further includes a first conductive layer disposed on the side of the light-emitting device layer away from the substrate, the first conductive layer including a first conductive portion, and the light-absorbing layer being an insulating layer;

[0023] The light-absorbing layer is located at least partially on the side of the first conductive layer away from the substrate, and the orthogonal projection of the first conductive portion onto the substrate at least partially overlaps with the orthogonal projection of the light-absorbing layer onto the substrate.

[0024] In some embodiments, the orthographic projection of the light-transmitting aperture onto the substrate is misaligned with the orthographic projection of the first conductive portion onto the substrate.

[0025] In some embodiments, there are multiple first conductive parts, and each first conductive part is distributed at intervals with each light-transmitting hole.

[0026] In some embodiments, the display panel further includes a second conductive layer disposed on the side of the first conductive layer away from the substrate, and a light-absorbing layer is located between the first conductive layer and the second conductive layer.

[0027] In some embodiments, both the first conductive layer and the second conductive layer are touch electrode layers.

[0028] Secondly, embodiments of this application provide a display device, including the display panel in any of the foregoing embodiments.

[0029] In some embodiments, the display device is a foldable display device, the display device includes a bendable area and non-bendable areas located on opposite sides of the bendable area, the display device has a front and a back in a flattened state, the front includes a main screen area covering the bendable area and the non-bendable areas located on opposite sides of the bendable area, the back includes a sub-screen area located in the non-bendable area, and the display panel is at least partially located in the sub-screen area.

[0030] In some embodiments, a housing is provided on the back side surrounding at least a portion of the sub-screen area, and the color of the housing is the same as the color of the display panel located in the sub-screen area when the screen is off.

[0031] This application provides a display panel and display device. Since the first absorption wavelength range and the first emission wavelength range at least partially overlap, the light absorption layer can absorb some ambient light of the same color as the light emitted by the first type of light-emitting unit, thereby reducing the reflective effect of that ambient light color. Simultaneously, the light emitted by the first type of light-emitting unit can exit the display panel through the light-transmitting hole, thus meeting display requirements. The light absorption layer can be matched with the emission color of the light-emitting unit to achieve a monochrome effect in the screen-off state, a color design for the screen appearance after the screen is off, and a mirror effect of various colors. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a cross-sectional structural diagram of a display panel provided in an embodiment of this application;

[0034] Figure 2 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0035] Figure 3 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0036] Figure 4 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0037] Figure 5 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0038] Figure 6 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0039] Figure 7 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0040] Figure 8 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0041] Figure 9 This is a cross-sectional structural diagram of another display panel provided in an embodiment of this application;

[0042] Figure 10 This is a schematic diagram of the front top view of a display device in a flattened state, provided in an embodiment of this application;

[0043] Figure 11 This is a top view of the back of a display device in a flattened state, as provided in an embodiment of this application.

[0044] Marker explanation:

[0045] 1. Substrate;

[0046] 2. Light-emitting device layer; 21. First type of light-emitting unit; 22. Second type of light-emitting unit; 23. Anode layer; 24. Light-emitting layer; 25. Cathode layer;

[0047] 3. Light absorption layer; 31. Light transmission hole;

[0048] 4. Polarizing film;

[0049] 5. Chiral liquid crystal layer

[0050] 6. First conductive layer; 61. First conductive part;

[0051] 7. Second conductive layer;

[0052] 8. Driving array layer;

[0053] 9. Encapsulation layer;

[0054] 10. Shell;

[0055] A1, Bendable area; A2, Non-bendable area; B1, Main screen area; B2, Secondary screen area;

[0056] X, thickness direction. Detailed Implementation

[0057] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0059] Organic light-emitting display (OLED) panels have many characteristics such as self-illumination, fast response, and wide viewing angle, and are increasingly being used in high-performance display fields such as flexible display devices.

[0060] With the advancement of technology, people have increasingly higher requirements for display panels, but reflection problems still exist in current display panels. Through research, the applicant discovered that one of the reasons is that the presence of metal electrodes and metal traces within the display panel can cause strong reflection of ambient light, thus affecting the display effect of the panel.

[0061] In some related technologies, the effect of reflection can be reduced by adding a polarizer. However, the presence of the polarizer will absorb some of the light emitted by the display panel, which will seriously affect the light emission efficiency of the display panel and increase power consumption.

[0062] To resolve the above issues, please refer to Figure 1 and Figure 2This application provides a display panel, which includes a substrate 1, a light-emitting device layer 2, and a light-absorbing layer 3. The light-emitting device layer 2 is disposed on one side of the substrate 1 and includes a plurality of light-emitting units. The light-absorbing layer 3 is disposed on the side of the light-emitting device layer 2 opposite to the substrate 1, and the light-absorbing layer 3 is provided with a plurality of light-transmitting holes 31 that penetrate the light-absorbing layer 3 along the thickness direction X of the substrate 1.

[0063] The plurality of light-emitting units include at least two first-type light-emitting units 21, the orthographic projection of the first-type light-emitting unit 21 on the substrate 1 and the orthographic projection of the light-transmitting hole 31 on the substrate 1 at least partially overlap, the first-type light-emitting unit 21 has a first emission wavelength range, the light absorption layer 3 has a first absorption wavelength range, and the first absorption wavelength range and the first emission wavelength range at least partially overlap.

[0064] Optionally, substrate 1 can be a rigid substrate, such as being made of glass or similar materials. Alternatively, substrate 1 can be a flexible substrate, such as being made of polyimide (PI). The light-emitting device layer 2 includes multiple light-emitting units that emit different colors of light; these units work together to emit light, thereby displaying a specific image. The light-emitting device layer 2 may include an organic light-emitting device layer. Exemplarily, the light-emitting device layer 2 includes an anode layer 23, a light-emitting layer 24, and a cathode layer 25, sequentially stacked along a first direction X. The anode layer 23 is located on the side of the light-emitting layer 24 facing the substrate 1. The anode layer 23 includes multiple anodes to define the positions of different light-emitting units and drive them to emit light for display. The cathode layer 25 includes a cathode, typically a common electrode, covering multiple light-emitting units.

[0065] The light-absorbing layer 3 is located on the side of the light-emitting device layer 2 facing away from the substrate 1. Furthermore, the light-absorbing layer 3 is located on the side of the cathode layer 25 facing away from the substrate 1. Normally, ambient light incident on the display panel can be reflected by metal electrodes and other sources, causing glare. However, the light-absorbing layer 3 has a first absorption wavelength range. Ambient light with wavelengths within this range can be absorbed by the light-absorbing layer 3, preventing it from reaching the metal electrodes and other sources, thus reducing glare and improving the display effect.

[0066] The light-absorbing layer 3 has a light-transmitting hole 31 extending through the light-absorbing layer 3 along the thickness direction X of the substrate 1, and the orthographic projection of the first type of light-emitting unit 21 on the substrate 1 at least partially overlaps with the orthographic projection of the light-transmitting hole 31 on the substrate 1. Light emitted by the first type of light-emitting unit 21 can exit the display panel through the light-transmitting hole 31. Optionally, the orthographic projection of the first type of light-emitting unit 21 on the substrate 1 is located within the orthographic projection of the light-transmitting hole 31 on the substrate 1. Optionally, the first emission wavelength range is within the first absorption wavelength range. Exemplarily, there are multiple light-transmitting holes 31 and multiple first type of light-emitting units 21, and the multiple light-transmitting holes 31 and multiple first type of light-emitting units 21 are arranged correspondingly.

[0067] It should be noted that in the first type of light-emitting unit 21, it can be as follows: Figure 2 As shown, one light-transmitting hole 31 corresponds to one first-type light-emitting unit 21; it can also be as follows: Figure 1 As shown, one light-transmitting hole 31 corresponds to at least two first-type light-emitting units 21. All first-type light-emitting units 21 may include only one color of light-emitting units. When at least two first-type light-emitting units 21 include at least two different colors of light-emitting units, the first emission wavelength range corresponding to the first-type light-emitting unit 21 may be the set (or union) of the emission wavelength ranges of all first-type light-emitting units 21.

[0068] The number and color of the light-emitting units in the first type of light-emitting unit 21 corresponding to different light-transmitting holes 31 can be the same or different, and this application embodiment does not limit this.

[0069] In this embodiment, since the first absorption wavelength range and the first emission wavelength range at least partially overlap, the light absorption layer 3 can absorb some of the ambient light of the same color as the light emitted by the first type of light-emitting unit 21, thereby reducing the reflective effect of the ambient light of that color. At the same time, the light emitted by the first type of light-emitting unit 21 can exit the display panel through the light-transmitting hole 31, thereby meeting the display requirements.

[0070] In addition to the substrate 1, the light-emitting device layer 2, and the light-absorbing layer 3, the display panel may also include functional film layers such as a driving array layer 8 and an encapsulation layer 9. The specific internal structure of the display panel needs to be determined according to the actual application, and this application embodiment does not impose any restrictions on it.

[0071] In some alternative embodiments, the first absorption wavelength range covers the first emission wavelength range. This design allows the light absorption layer 3 to absorb all ambient light of the same color as the light emitted by the first type of light-emitting unit 21, thereby further reducing the impact of ambient light of the same color as the light emitted by the first type of light-emitting unit 21 on the display effect while meeting display requirements.

[0072] In some embodiments, such as Figure 1As shown, the plurality of light-emitting units also include at least two second-type light-emitting units 22, the orthographic projection of the second-type light-emitting units 22 onto the substrate 1 at least partially overlapping with the orthographic projection of the light-absorbing layer 3 onto the substrate 1. The light-absorbing layer 3 has a first transmission wavelength range, the first transmission wavelength range at least partially overlapping with a second emission wavelength range.

[0073] In addition to having a first absorption wavelength range, the light absorption layer 3 also has a first transmission wavelength range. Light with wavelengths within the first absorption wavelength range can be absorbed by the light absorption layer 3, thereby preventing ambient light with wavelengths within the first absorption wavelength range from reaching the metal electrodes and other parts in the light-emitting device layer for reflection, thus reducing the impact of reflection. Meanwhile, light with wavelengths within the first transmission wavelength range can have high transmittance at the light absorption layer 3, meaning that light with wavelengths within the first transmission wavelength range can easily pass through the light absorption layer 3.

[0074] Since the orthographic projection of the second type of light-emitting unit 22 on the substrate 1 and the orthographic projection of the light-absorbing layer 3 on the substrate 1 overlap at least partially, the embodiments of this application make the first transmission wavelength range and the second emission wavelength range overlap at least partially, so that the light emitted by the second type of light-emitting unit 22 can pass through the light-absorbing layer 3 to achieve display and meet the display requirements.

[0075] In some alternative embodiments, the orthographic projection of the second type of light-emitting unit 22 onto the substrate 1 lies within the orthographic projection of the light-absorbing layer 3 onto the substrate 1. In other alternative embodiments, the second emission wavelength range is within the first transmission wavelength range. This design allows all the light emitted by the second type of light-emitting unit 22 to pass through the light-absorbing layer 3 and exit the display panel, thereby further improving the display effect.

[0076] In some embodiments, at least two second-type light-emitting units 22 include light-emitting units of at least two different colors. Different colors of light-emitting units correspond to different emission wavelength ranges, and the second emission wavelength range corresponding to the second-type light-emitting unit 22 can be the set (or union) of emission wavelength ranges within all second-type light-emitting units 22.

[0077] In some embodiments, the first type of light-emitting unit 21 and the second type of light-emitting unit 22 emit different colors, and at least two first type of light-emitting units 21 are light-emitting units of the same color. The first type of light-emitting units 21 of the same color may be located in the same light-transmitting hole 31 or may be distributed in different light-transmitting holes 31, and the embodiments of this application do not limit this.

[0078] In some alternative embodiments, the light-absorbing layer 3 may include a color resist material, and by using a special dye of a specific color inside the color resist material, the light-absorbing layer 3 can only allow light corresponding to the color of the special dye to pass through, while other light is absorbed and cannot pass through the light-absorbing layer 3.

[0079] Based on this, since at least two second-type light-emitting units 22 include light-emitting units of at least two different colors, the color resist color within the light-absorbing layer 3 can be a mixture of the colors of all light-emitting units within the second-type light-emitting units 22. Optionally, as... Figure 1 As shown in Figure 2, at least two second-type light-emitting units 22 include a green light-emitting unit G and a red light-emitting unit R, and the light-absorbing layer 3 includes a yellow color resist.

[0080] Green light-emitting unit G can emit green light, red light-emitting unit R can emit red light, and yellow is a color formed by mixing red and green. Therefore, yellow color blocker can not only allow yellow light to pass through, but also allow red and green light to pass through. Other colors of light (such as blue light) cannot pass through light absorption layer 3 and are thus absorbed by light absorption layer 3.

[0081] Furthermore, such as Figure 1 As shown in Figure 2, the first type of light-emitting unit 21 may include a blue light-emitting unit B. The blue light-emitting unit B can emit blue light, but the blue light cannot pass through the light absorption layer 3. Therefore, it needs to be set in correspondence with the light-transmitting hole 31 so that the blue light emitted by the first type of light-emitting unit 21 can be emitted through the light-transmitting hole 31. Most of the blue light in the ambient light will be absorbed by the light absorption layer 3, so that the reflection problem will not occur and the display effect will be improved.

[0082] In addition, the design of specific color resists can achieve a monochrome effect when the display panel is in the off state. At the same time, by changing the color of the color resist and the color of the light-emitting unit in the second type of light-emitting unit 22, different colors of mirror effect can be achieved in the off state, which has strong applicability.

[0083] In some embodiments, please refer to Figure 3 At least two first-class light-emitting units 21 include light-emitting units of at least two different colors.

[0084] Different colored first-type light-emitting units 21 can be located within the same light-transmitting hole 31 or within different light-transmitting holes 31. Light emitted by the first-type light-emitting units 21 of various colors can all be emitted through the light-transmitting hole 31, thereby achieving the corresponding color display effect.

[0085] In some embodiments, the first type of light-emitting unit 21 and the second type of light-emitting unit 22 emit different colors, and at least two of the second type of light-emitting units 22 emit the same color. All the second type of light-emitting units 22 include only one color of light-emitting unit.

[0086] The light emitted by the first type of light-emitting unit 21 can leave the display panel through the light-transmitting hole 31, while the light emitted by the second type of light-emitting unit 22 needs to pass through the light-absorbing layer 3 to leave the display panel. Therefore, in this embodiment, the first type of light-emitting unit 21 and the second type of light-emitting unit 22 emit different colors, so that the wavelength of the light emitted by the second type of light-emitting unit 22 is within the first transmission wavelength range, thereby achieving the display effect.

[0087] Optionally, such as Figure 3 As shown, at least two first-type light-emitting units 21 include a green light-emitting unit G and a red light-emitting unit R, and the second-type light-emitting unit 22 includes a blue light-emitting unit B. The light-absorbing layer includes a blue color resist.

[0088] In some embodiments, please refer to Figure 4 The first type of light-emitting unit 21 is projected onto the substrate 1 in the orthogonal projection of the light-transmitting hole 31 onto the substrate 1.

[0089] In this embodiment, the orthogonal projection of the light-transmitting hole 31 onto the substrate 1 covers the orthogonal projection of the first type of light-emitting unit 21 onto the substrate 1, thereby ensuring that the light emitted vertically from the first type of light-emitting unit 21 can pass through the light-transmitting hole 31 and the light-absorbing layer 3, thereby further improving the transmittance of the light emitted by the first type of light-emitting unit 21 and improving the display effect.

[0090] In some optional embodiments, the center of the first type of light-emitting unit 21 projected onto the substrate 1 coincides with the center of the light-transmitting hole 31 projected onto the substrate 1. This allows the light emitted by the first type of light-emitting unit 21 to be better emitted from the light-transmitting hole 31. Optionally, one first type of light-emitting unit 21 corresponds to one light-transmitting hole 31.

[0091] In some embodiments, such as Figure 4 As shown, the distance D1 between the edge of the light-transmitting hole 31 projected onto the substrate 1 and the edge of the first type of light-emitting unit 21 projected onto the substrate 1 is greater than or equal to 5 μm.

[0092] The projected area of ​​the light-transmitting aperture 31 on the substrate 1 can be larger than the projected area of ​​the first type of light-emitting unit 21 on the substrate 1. The projected area of ​​the light-transmitting aperture 31 on the substrate 1 can completely cover the projected area of ​​the first type of light-emitting unit 21 on the substrate 1. At the same time, the distance between the edge of the projected area of ​​the light-transmitting aperture 31 on the substrate 1 and the edge of the projected area of ​​the first type of light-emitting unit 21 on the substrate 1 is always greater than 5μm. Therefore, in addition to the vertically emitted light from the first type of light-emitting unit 21, some light from other angles can also pass through the light-transmitting aperture 31, thereby improving the transmittance of the light emitted by the first type of light-emitting unit 21 and further improving the display effect.

[0093] In some embodiments, please refer to Figure 5The display panel also includes a polarizer 4 disposed on the side of the light-absorbing layer 3 facing away from the substrate 1. The polarizer 4 may be a circular polarizer, which may include a linear polarizing layer and a quarter-wave plate layer. The polarizer 4 can be used to reduce the reflection of ambient light. The rotation direction of the polarized light that can be transmitted through the polarizer 4 is opposite to the rotation direction of the polarized light that can be absorbed by the polarizer 4.

[0094] In some embodiments, please refer to Figure 5 The display panel also includes a brightness enhancement layer. This layer includes a polarizer 4 and a chiral liquid crystal layer 5. The chiral liquid crystal layer 5 can be disposed between the polarizer 4 and the light-emitting device layer 2. Optionally, the chiral liquid crystal layer 5 can be disposed between the polarizer 4 and the light-absorbing layer 3. The brightness enhancement layer can be used to brighten the light emitted by the first type of light-emitting unit 21, thereby increasing the light extraction efficiency of the light emitted by the first type of light-emitting unit 21.

[0095] Optionally, chiral liquid crystals include cholesteric liquid crystals (CLCs). Chiral liquid crystals exhibit selective reflection of circularly polarized light; circularly polarized light with the same helical direction as the liquid crystal molecules can pass through, while circularly polarized light with the opposite helical direction is reflected. This reflection characteristic also exhibits wavelength selectivity. The wavelength range reflected by chiral liquid crystals is determined by the refractive index (ne, no) and pitch of the liquid crystal molecules. Pitch refers to the thickness of the liquid crystal molecules when the long axis is rotated 360 degrees along the Z-axis. The central wavelength of reflection λ = 1 / 2(ne + no) * pitch, and the spectral width of the reflected light Δλ = (ne - no) * pitch. No is the ordinary refractive index, and ne is the extraordinary refractive index.

[0096] Optionally, for polarized light of a wavelength that the brightness enhancement functional layer can enhance, the polarizer 4 can transmit polarized light of that wavelength in a direction opposite to the polarization direction of the polarized light that the polarizer 4 can absorb; the chiral liquid crystal layer 5 can reflect polarized light of that wavelength in a direction opposite to the polarization direction of the polarized light that the chiral liquid crystal layer 5 can transmit; the polarizer 4 can transmit polarized light of that wavelength in a direction the same as the polarization direction of the polarized light that the chiral liquid crystal layer 5 can transmit; and the polarizer 4 can transmit polarized light of that wavelength in a direction opposite to the polarization direction of the polarized light that the chiral liquid crystal layer 5 can reflect, thereby achieving the purpose of enhancing the light emitted by the first type of light-emitting unit 21. For example, for polarized light of a wavelength that the brightness enhancement functional layer can enhance, the polarizer 4 can transmit left-handed light, absorb right-handed light, reflect right-handed light, and transmit left-handed light. For example, for polarized light of a wavelength that the brightness enhancement layer can enhance, polarizer 4 can transmit right-handed light and absorb left-handed light, while chiral liquid crystal layer 5 can reflect left-handed light and transmit right-handed light. For light other than the wavelength that the brightness enhancement layer can enhance, regardless of the direction of rotation, chiral liquid crystal layer 5 can transmit light.

[0097] As described above, in a display panel, if only the polarizer 4 is provided, without the chiral liquid crystal layer 5 and the light absorption layer 3, the circular polarizer 4 can reduce the reflection of ambient light, but it will reduce the transmittance of the light emitted by the light-emitting unit. Specifically, ambient light usually includes light with multiple polarization directions, and the polarizer 4 usually only allows light with a specific polarization direction to pass through. For example, the polarizer 4 allows left-handed light to pass through but not right-handed light. Left-handed light entering the display panel will be reflected by metal electrodes or other metal layers, thus becoming right-handed light. The right-handed light will be absorbed by the polarizer 4 and cannot pass through, thus reducing the impact of ambient light reflection. Similarly, left-handed light emitted by the light-emitting unit can pass through the polarizer 4, while right-handed light emitted by the light-emitting unit cannot pass through the polarizer 4, thus reducing the transmittance of the light emitted by the light-emitting unit and increasing power consumption.

[0098] For example, the chiral liquid crystal layer 5 is located on the side of the polarizer 4 facing the substrate 1. Similar to the polarizer 4, the chiral liquid crystal layer 5 also allows the left-handed light emitted by the first type of light-emitting unit to be emitted. However, unlike the polarizer 4, for right-handed light, the chiral liquid crystal layer 5 reflects the right-handed light emitted by the first type of light-emitting unit 21 without absorbing it. Therefore, the right-handed light emitted by the first type of light-emitting unit 21 is reflected by the chiral liquid crystal layer 5 and then reflected by the metal electrode or other metal layers, thus becoming left-handed light. This light can then pass through the light-transmitting hole 31, the chiral liquid crystal layer 5, and the polarizer 4, so that both the left-handed and right-handed light emitted by the first type of light-emitting unit 21 can be emitted, achieving a brightening effect.

[0099] However, similarly, if only the polarizer 4 and the chiral liquid crystal layer 5 are provided, and the light absorption layer 3 is not provided, the left-handed light with a wavelength in the first absorption wavelength range inside the display panel passes through the polarizer 4 and the chiral liquid crystal layer 5, and is then reflected by the metal electrode or other metal layer, becoming right-handed light. The ambient light is also reflected by the chiral liquid crystal layer 5, and then reflected by the metal electrode or other metal layer, thus becoming left-handed light, which can then pass through the chiral liquid crystal layer 5 and the polarizer 4, thus aggravating the ambient light reflection problem.

[0100] In embodiments of this application, when a polarizer 4, a chiral liquid crystal layer 5, and a light-absorbing layer 3 are simultaneously present, such as Figure 5 As shown, the solid line C represents left-handed ambient light with a wavelength in the first absorption wavelength range. It passes through the polarizer 4 and the chiral liquid crystal layer 5 in sequence, and then hits the light absorption layer 3. The ambient light is absorbed by the light absorption layer 3 and cannot be emitted away from the display panel, thereby reducing the reflection effect of the ambient light. The light absorption layer 3 reduces the problem of enhanced reflection caused by the introduction of the chiral liquid crystal layer 5.

[0101] As for the first type of light-emitting unit 21, such as Figure 5 As shown, the solid line D represents the right-handed light emitted by the first type of light-emitting unit 21. Due to the presence of the light-transmitting hole 31, the right-handed light emitted by the first type of light-emitting unit 21 is reflected by the chiral liquid crystal layer 5 and reaches the location of the metal electrode or other metal layer through the light-transmitting hole 31. Then it is reflected by the metal electrode or other metal layer and becomes left-handed light, which passes through the light-transmitting hole 31, the chiral liquid crystal layer 5 and the polarizer 4 in sequence, and can then be emitted away from the display panel. Therefore, the brightness enhancement layer can enhance the light emitted by the first type of light-emitting unit 21.

[0102] Optionally, the light absorption layer 3 is a monochromatic colored resist layer. Alternatively, the light absorption layer 3 is a single-layer colored resist layer. In the screen-off state, the color of the display panel may be the same as the color (or mixed color) of light within the first absorption wavelength range of the light absorption layer 3. In the screen-off state, the color of the display panel may be the same as the color (or mixed color) of the light emitted by the first type of light-emitting unit 21.

[0103] It should be noted that the chiral liquid crystal layer 5 can be composed of multiple parts, with different parts paired with polarizers to enhance the brightness of the light emitted by the first type of light-emitting unit 21 of different colors. However, in order to reduce the manufacturing difficulty of the chiral liquid crystal layer 5, the chiral liquid crystal layer 5 is paired with polarizers to enhance the brightness of light of a specific color. Since some of the light emitted by the first type of light-emitting unit 21 is absorbed by the light absorption layer 3, the brightness enhancement layer can optionally enhance the light emitted by the first type of light-emitting unit 21, so that it can emit light with the same brightness as the second type of light-emitting unit 22 under the same or similar voltage conditions, thereby reducing the reflection of ambient light and reducing the energy consumption of the display panel.

[0104] In some other embodiments, the first type of light-emitting unit 21 includes a blue light-emitting unit B. The brightening functional layer can enhance the light emitted by the blue light-emitting unit B. The luminous brightness of the blue light-emitting unit is usually lower than that of other color light-emitting units. Therefore, enhancing the blue light can improve the uniformity of the display brightness.

[0105] In some alternative embodiments, the brightness enhancement layer does not amplify the light emitted by the second type of light-emitting unit 22, and the brightness enhancement layer does not amplify light located within the first transmission wavelength range, therefore... Figure 5As shown, the solid line E represents left-handed ambient light with a wavelength in the first transmission wavelength range. After entering the display panel, the left-handed ambient light passes through the polarizer 4, the chiral liquid crystal layer 5, and the light absorption layer 3 in sequence. It is then reflected by the metal layer and becomes right-handed light, which then reaches the position of the chiral liquid crystal layer 5. However, the chiral liquid crystal layer 5 does not affect the propagation of the right-handed ambient light in the first transmission wavelength range. Therefore, the right-handed light in the first transmission wavelength range will pass through the chiral liquid crystal layer 5 and propagate to the polarizer 4, where it will be absorbed. This reduces the reflection problem of ambient light with a wavelength in the first transmission wavelength range.

[0106] In addition, such as Figure 5 As shown, in the screen-off state, ambient light with wavelengths within the first transmission wavelength range is absorbed by the polarizer 4. A portion of the ambient light within the first absorption wavelength range can pass through the light-transmitting hole 31 and, under the multiple reflections of the metal electrodes or other metal layers, becomes left-handed light and exits the display panel. The dashed line F represents the propagation path of the left-handed ambient light within the light-transmitting hole 31 within the first absorption wavelength range. Therefore, the display panel can exhibit a mirror effect of a specific color in the screen-off state, matching the color of the casing and improving the visual experience.

[0107] In summary, the mirror color of the display panel in the screen-off state is jointly determined by the light absorption layer 3 and the brightness enhancement layer, and this application embodiment does not limit this. For example, the light absorption layer 3 includes a yellow color resist, capable of absorbing blue light, while the brightness enhancement layer enhances the blue light. Therefore, some blue ambient light can enter the light-transmitting hole 31 of the display panel and, through multiple reflections by metal electrodes or other metal layers, pass through the chiral liquid crystal layer and polarizer 4, thus presenting a blue mirror effect, consistent with the blue casing color. For example, the light absorption layer 3 includes a blue color resist, capable of absorbing red and green light, while the brightness enhancement layer enhances the red and green light. Therefore, some red and green light in the ambient light can enter the light-transmitting hole 31 of the display panel and, through multiple reflections by metal electrodes or other metal layers, pass through the chiral liquid crystal layer 5 and polarizer 4, thus presenting a mixed red and green (i.e., yellow) mirror effect, consistent with the yellow casing color.

[0108] Optionally, the first type of light-emitting unit 21 may include a blue light-emitting unit B, and at least two second type of light-emitting units 22 may include a green light-emitting unit G and a red light-emitting unit R. The chiral liquid crystal layer 5 may be disposed as a single layer, covering all light-emitting units. The chiral liquid crystal layer 5, in conjunction with the polarizer 4, can be used to enhance the brightness of the light emitted by the blue light-emitting unit B.

[0109] Optional, such as Figure 6As shown, at least two first-type light-emitting units 21 include a green light-emitting unit G and a red light-emitting unit R, and the second-type light-emitting unit 22 includes a blue light-emitting unit B. The chiral liquid crystal layer 5 may include a first sub-chiral liquid crystal layer 51 located on the side of the red light-emitting unit R away from the substrate and a second sub-chiral liquid crystal layer 52 located on the side of the green light-emitting unit G away from the substrate. The first sub-chiral liquid crystal layer 51 can reflect red polarized light with a specific rotation direction, and can transmit polarized light other than red light. The second sub-chiral liquid crystal layer 52 can reflect green polarized light with a specific rotation direction, and can transmit polarized light other than green polarized light. The first sub-chiral liquid crystal layer 51, in conjunction with a polarizer 4, can be used to enhance the brightness of the light emitted by the red light-emitting unit R. The second sub-chiral liquid crystal layer 52, in conjunction with a polarizer 4, can be used to enhance the brightness of the light emitted by the red light-emitting unit R. The rotation direction of the red polarized light reflected by the first sub-chiral liquid crystal layer 51 may be opposite to the rotation direction of the red polarized light transmitted by the polarizer 4. The rotation direction of the green polarized light reflected by the second chiral liquid crystal layer 52 can be opposite to the rotation direction of the red polarized light transmitted by the polarizer 4.

[0110] In some embodiments, please refer to Figure 7 The display panel also includes a first conductive layer 6 disposed on the side of the light-emitting device layer 2 facing away from the substrate 1, the first conductive layer 6 including a first conductive portion 61. Optionally, the light-absorbing layer 3 may be an insulating layer.

[0111] Optionally, the light-absorbing layer 3 is at least partially located on the side of the first conductive layer 6 away from the substrate 1, and the orthographic projection of the first conductive portion 61 on the substrate 1 at least partially overlaps with the orthographic projection of the light-absorbing layer 3 on the substrate 1.

[0112] The first conductive layer 6 may include a metal layer or a transparent conductive layer. The transparent conductive layer may include materials such as indium tin oxide (ITO). The first conductive layer 6 may be a touch electrode layer. The touch electrode layer may be a self-capacitive touch electrode layer. The light absorption layer 3 may be reused as an insulating layer in the touch electrode layer. The first conductive layer 6 is located on the side of the light-emitting device layer 2 away from the substrate 1, that is, on the side of the cathode layer 25 away from the substrate 1. Ambient light incident on the display panel may be reflected by the metal electrode or other metal layers, and may also be reflected by the first conductive portion 61 on the first conductive layer 6. Therefore, in this embodiment, the light absorption layer 3 is located at least partially on the side of the first conductive layer 6 away from the substrate 1, so that the light absorption layer 3 can cover at least part of the first conductive portion 61, thereby further reducing the reflection problem of ambient light.

[0113] In some embodiments, the projection of the light-transmitting hole 31 onto the substrate 1 is offset from the projection of the first conductive part 61 onto the substrate 1. Since the first conductive part 61 is not located at the corresponding position of the light-transmitting hole 31, the light emitted by the first type of light-emitting unit 21 will not be blocked by the first conductive part 61, thereby further improving the luminous brightness of the first type of light-emitting unit 21.

[0114] In some embodiments, there are multiple first conductive parts 61, and each first conductive part 61 is distributed at intervals with each light-transmitting hole 31.

[0115] Each first conductive part 61 is staggered with the light-transmitting hole 31, and each first conductive part 61 is spaced apart from each light-transmitting hole 31. That is, each first conductive part 61 is spaced apart from the light-transmitting hole 31 in a direction parallel to the substrate 1. This allows the light-absorbing layer 3 to block the side of the first conductive part 61, preventing the light emitted by the first type of light-emitting unit 21 from being reflected by the side of the first conductive part 61, thereby changing the propagation path and improving display reliability. At the same time, it prevents ambient light in the first absorption wavelength range from being reflected by the side of the first conductive part 61, further reducing the reflection problem of ambient light.

[0116] In some embodiments, please refer to Figure 8 The display panel also includes a second conductive layer 7 disposed on the side of the first conductive layer 6 away from the substrate 1, and a light absorption layer 3 is located between the first conductive layer 6 and the second conductive layer 7.

[0117] In addition to the first conductive layer 6, the side of the light-emitting device layer 2 facing away from the substrate 1 may also include a second conductive layer 7. To avoid signal crosstalk between the first conductive layer 6 and the second conductive layer 7, an insulating layer is usually provided between them. In this embodiment, the light-absorbing layer 3 is also reused as an insulating layer to prevent signal crosstalk between the first conductive layer 6 and the second conductive layer 7. Optionally, both the first conductive layer 6 and the second conductive layer 7 are touch electrode layers. The second conductive layer 7 may include a metal layer or a transparent conductive layer, etc. The touch electrode layer may be a mutual capacitance touch electrode layer.

[0118] In other embodiments, please refer to Figure 9 The light-absorbing layer 3 can also be located on the side of the second conductive layer 7 away from the substrate 1. The light-absorbing layer 3 covers both the first conductive layer 6 and the second conductive layer 7, thereby further reducing the reflection problem of ambient light.

[0119] Please see Figure 10 This application provides a display device, including a display panel of any of the foregoing embodiments.

[0120] It should be noted that the display device provided in this application embodiment has the beneficial effects of the display panel provided in this application embodiment. For details, please refer to the specific descriptions of the display panel and array substrate in the above embodiments. This embodiment will not repeat them here.

[0121] In some embodiments, please refer to Figure 10 and Figure 11 The display device is a foldable display device. The display device includes a bendable area A1 and non-bendable areas A2 located on opposite sides of the bendable area A1. When unfolded, the display device has a front and a back side arranged opposite each other. The front side includes a main screen area B1, which covers the bendable area A1 and the non-bendable areas A2 located on opposite sides of the bendable area A1. The back side includes a secondary screen area B2, which is located within the non-bendable area A2. The display panel is located at least within the secondary screen area B2.

[0122] The display device includes a bendable area A1 and a non-bendable area A2. The display device rotates around the bendable area A1 via the non-bendable area A2, enabling it to switch between a flat and folded state. In normal use, the display device is in the flat state, displaying a specific image to the user through the main screen area B1 on the front. During transport, to improve portability, the display device is usually folded, with the back of the display device facing the user, protecting the main screen area B1. Meanwhile, the secondary screen area B2 can display basic information such as time and date for user reference. The secondary screen area B2 is not obstructed by the housing 10. When the display device is folded, the front of the display device is located inside the back.

[0123] The secondary screen area B2 of the display device includes the display panel provided in the embodiments of this application. As can be seen from the foregoing, due to the presence of the light absorption layer 3, the display panel can display a mirror effect of a specific color in the screen-off state, thereby improving the visual experience for the human eye.

[0124] In some embodiments, a housing 10 is provided on the back side, surrounding at least a portion of the sub-screen area B2, and the color of the housing 10 is the same as the color of the display panel located in the sub-screen area B2 in the screen-off state.

[0125] The casing 10 is not black. The casing 10 can be any color. Compared with the prior art where the casing color is inconsistent with the color of the sub-screen area in the off state, the embodiments of this application make the casing 10 color the same as the color of the display panel located in the sub-screen area B2 in the off state, thereby further improving the visual effect in the off state.

[0126] Optionally, the display device may include a mobile phone, tablet computer, laptop computer, etc.

[0127] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0128] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting device layer is disposed on one side of the substrate, and the light-emitting device layer includes a plurality of light-emitting units; A light-absorbing layer is disposed on the side of the light-emitting device layer away from the substrate, and the light-absorbing layer is provided with a plurality of light-transmitting holes that penetrate the light-absorbing layer along the thickness direction of the substrate; The plurality of light-emitting units include at least two first-type light-emitting units, wherein the orthographic projection of the first-type light-emitting unit on the substrate and the orthographic projection of the light-transmitting hole on the substrate at least partially overlap, the first-type light-emitting unit has a first emission wavelength range, the light-absorbing layer has a first absorption wavelength range, and the first absorption wavelength range and the first emission wavelength range at least partially overlap. The display panel further includes a brightness enhancement layer, which includes a polarizer disposed on the side of the light absorption layer away from the substrate and a chiral liquid crystal layer disposed between the polarizer and the light absorption layer. The brightness enhancement layer is used to enhance the light emitted by the first type of light-emitting unit. The light absorption layer has a first transmission wavelength range, and the chiral liquid crystal layer can transmit light within the first transmission wavelength range. The plurality of light-emitting units further includes at least two second-type light-emitting units, wherein the orthographic projection of the second-type light-emitting units on the substrate at least partially overlaps with the orthographic projection of the light-absorbing layer on the substrate; The second type of light-emitting unit has a second emission wavelength range, wherein the first transmission wavelength range and the second emission wavelength range at least partially overlap; Specifically, the chiral liquid crystal layer transmits light of any wavelength other than that enhanced by the brightening functional layer, regardless of its rotation direction.

2. The display panel according to claim 1, characterized in that, The second emission wavelength range is within the first transmission wavelength range.

3. The display panel according to claim 1, characterized in that, The orthographic projection of the second type of light-emitting unit onto the substrate lies within the orthographic projection of the light-absorbing layer onto the substrate.

4. The display panel according to claim 1, characterized in that, The at least two second-type light-emitting units include light-emitting units of at least two different colors.

5. The display panel according to claim 4, characterized in that, The first type of light-emitting unit and the second type of light-emitting unit emit different colors, and the at least two first type of light-emitting units are light-emitting units of the same color.

6. The display panel according to claim 4, characterized in that, The at least two second-type light-emitting units include green light-emitting units and red light-emitting units, the first-type light-emitting units include blue light-emitting units, and the light-absorbing layer includes yellow color resist; The display panel exhibits a blue mirror effect when the screen is off.

7. The display panel according to claim 1, characterized in that, The at least two first-class light-emitting units include light-emitting units of at least two different colors.

8. The display panel according to claim 1, characterized in that, The first type of light-emitting unit and the second type of light-emitting unit emit different colors, and the at least two second type of light-emitting units are light-emitting units of the same color.

9. The display panel according to claim 1, characterized in that, The at least two first-type light-emitting units include a green light-emitting unit and a red light-emitting unit, the second-type light-emitting unit includes a blue light-emitting unit, and the light-absorbing layer includes a blue color resist; The display panel exhibits a yellow mirror effect when the screen is off.

10. The display panel according to claim 9, characterized in that, The chiral liquid crystal layer includes a first sub-chiral liquid crystal layer located on the side of the red light-emitting unit away from the substrate and a second sub-chiral liquid crystal layer located on the side of the green light-emitting unit away from the substrate; The brightness enhancement layer is used to enhance the brightness of the light emitted by the red light-emitting unit; the brightness enhancement layer is used to enhance the brightness of the light emitted by the green light-emitting unit.

11. The display panel according to claim 1, characterized in that, The orthographic projection of the first type of light-emitting unit on the substrate is located within the orthographic projection of the light-transmitting hole on the substrate.

12. The display panel according to claim 11, characterized in that, The distance D1 between the light-transmitting hole and the projection edge of the first type of light-emitting unit on the substrate is greater than or equal to 5 μm.

13. The display panel according to claim 11, characterized in that, The center of the first type of light-emitting unit in the orthogonal projection of the substrate coincides with the center of the light-transmitting hole in the orthogonal projection of the substrate.

14. The display panel according to claim 1, characterized in that, The light absorption layer is a monochromatic colored resist layer.

15. The display panel according to claim 1, characterized in that, It also includes a first conductive layer disposed on the side of the light-emitting device layer opposite to the substrate, the first conductive layer including a first conductive portion; the light-absorbing layer is an insulating layer. Wherein, the light-absorbing layer is at least partially located on the side of the first conductive layer away from the substrate, and the orthographic projection of the first conductive portion on the substrate at least partially overlaps with the orthographic projection of the light-absorbing layer on the substrate.

16. The display panel according to claim 15, characterized in that, The projection of the light-transmitting hole onto the substrate is misaligned with the projection of the first conductive part onto the substrate.

17. The display panel according to claim 15, characterized in that, There are multiple first conductive parts, and each first conductive part is distributed at intervals with each light-transmitting hole.

18. The display panel according to claim 15, characterized in that, It also includes a second conductive layer disposed on the side of the first conductive layer away from the substrate, and the light-absorbing layer is located between the first conductive layer and the second conductive layer.

19. The display panel according to claim 18, characterized in that, Both the first conductive layer and the second conductive layer are touch electrode layers.

20. The display panel according to claim 1, characterized in that, The brightening functional layer does not enhance the light emitted by the second type of light-emitting unit, and the brightening functional layer does not enhance the light located in the first transmission wavelength range. For the polarized light of the wavelength that the brightening functional layer enhances, the direction of rotation of the polarized light transmitted by the polarizer is opposite to the direction of rotation of the polarized light absorbed by the polarizer. The direction of rotation of the polarized light reflected by the chiral liquid crystal layer is opposite to the direction of rotation of the polarized light transmitted by the chiral liquid crystal layer. The direction of rotation of the polarized light transmitted by the polarizer is the same as the direction of rotation of the polarized light transmitted by the chiral liquid crystal layer. The direction of rotation of the polarized light transmitted by the polarizer is opposite to the direction of rotation of the polarized light reflected by the chiral liquid crystal layer, so as to achieve the purpose of brightening the light emitted by the first type of light-emitting unit.

21. A display panel, characterized in that, include: Substrate; A light-emitting device layer is disposed on one side of the substrate, and the light-emitting device layer includes a plurality of light-emitting units; A light-absorbing layer is disposed on the side of the light-emitting device layer away from the substrate, and the light-absorbing layer is provided with a plurality of light-transmitting holes that penetrate the light-absorbing layer along the thickness direction of the substrate; The plurality of light-emitting units include at least two first-type light-emitting units, wherein the orthographic projection of the first-type light-emitting unit on the substrate and the orthographic projection of the light-transmitting hole on the substrate at least partially overlap, the first-type light-emitting unit has a first emission wavelength range, the light-absorbing layer has a first absorption wavelength range, and the first absorption wavelength range and the first emission wavelength range at least partially overlap. The display panel further includes a brightness enhancement layer, which includes a polarizer disposed on the side of the light absorption layer away from the substrate and a chiral liquid crystal layer disposed between the polarizer and the light absorption layer. The brightness enhancement layer is used to enhance the light emitted by the first type of light-emitting unit. The light absorption layer has a first transmission wavelength range, and the chiral liquid crystal layer can transmit light within the first transmission wavelength range. The plurality of light-emitting units further includes at least two second-type light-emitting units, wherein the orthographic projection of the second-type light-emitting units on the substrate at least partially overlaps with the orthographic projection of the light-absorbing layer on the substrate; The second type of light-emitting unit has a second emission wavelength range, wherein the first transmission wavelength range and the second emission wavelength range at least partially overlap; The brightening layer does not enhance the light emitted by the second type of light-emitting unit, nor does it enhance the light within the first transmission wavelength range.

22. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 20 or the display panel as described in claim 21.

23. The display device according to claim 22, characterized in that, The display device is a foldable display device, which includes a bendable area and non-bendable areas located on opposite sides of the bendable area. When the display device is unfolded, it has a front and a back side arranged opposite to each other. The front side includes a main screen area, which covers the bendable area and the non-bendable areas located on opposite sides of the bendable area. The back side includes a secondary screen area, which is located in the non-bendable area. The display panel is located at least in the secondary screen area.

24. The display device according to claim 23, characterized in that, The back is provided with a housing surrounding at least a portion of the sub-screen area, the color of which is the same as the color of the display panel located in the sub-screen area when the screen is off.

Images