Display panel and display device

Abstract

Provided are a display panel and a display device. The display panel comprises: a light-emitting layer (2), comprising a plurality of light-emitting portions that emit white light; and a light filtering layer (3), located on a light exit side of the light-emitting layer and comprising a plurality of light filtering portions; the plurality of light filtering portions include a first light filtering portion (31), a second light filtering portion (32), a third light filtering portion (33), and a fourth light filtering portion (34); the first light filtering portion (31) is configured to emit light of a first color; the second light filtering portion (32) is configured to emit light of a second color; the third light filtering portion (33) is configured to emit light of a third color; and the fourth light filtering portion (34) is configured to emit white light. According to the present application, full color display is realized by means of a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and the pixel reflectivity of the fourth sub-pixel is reduced by means of the fourth light filtering portion, so that the pixel reflectivity of a fourth sub-pixel area is close to the pixel reflectivity of other sub-pixel areas, that is, the light-emitting effect of the sub-pixels is close, ensuring the display effect.

Description

Display panel and display device

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent application number 202311394838.9, filed on October 25, 2023, entitled “Display Panel and Display Device,” and the entire contents of this Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0004] With the continuous development of display technology, people have higher and higher requirements for the image quality (such as color gamut) of display devices. For example, in related technologies, a display device can achieve full-color display through a filter layer.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field.

[0006] Summary of the Invention

[0007] An object of the present disclosure is to provide a display panel and a display device, which can improve the display effect of the display panel.

[0008] According to one aspect of the present disclosure, there is provided a display panel, comprising:

[0009] a light-emitting layer comprising a plurality of light-emitting portions distributed in an array, wherein the plurality of light-emitting portions at least includes a light-emitting portion emitting white light;

[0010] a filter layer, located on the light-emitting side of the light-emitting layer, and comprising a plurality of filter portions corresponding one-to-one to the plurality of light-emitting portions;

[0011] In which, the multiple filtering parts include a first filtering part, a second filtering part, a third filtering part and a fourth filtering part, and the light-emitting part corresponding to the fourth filtering part emits white light. In the direction perpendicular to the display panel, the first filtering part, the second filtering part and the third filtering part all cover the corresponding light-emitting part, and the fourth filtering part at least partially overlaps with the corresponding light-emitting part. The first filtering part is configured to emit a first color light, the second filtering part is configured to emit a second color light, the third filtering part is configured to emit a third color light, and the fourth filtering part is configured to emit white light.

[0012] According to any display panel described in the present disclosure, the fourth filter section includes a first sub-filter section, and the output light of the first sub-filter section has the same color as the output light of the second filter section.

[0013] According to any display panel described in the present disclosure, the first sub-filter portion and the second sub-filter portion are arranged in the same layer and are made of the same material.

[0014] According to any display panel of the present disclosure, when the ratio of the area of ​​the first sub-filter portion to the area of ​​the light-emitting region of the light-emitting portion corresponding to the fourth filter portion is greater than or equal to a reference value, the thickness of the first sub-filter portion is less than the thickness of the second filter portion;

[0015] When the ratio of the area of ​​the first sub-filtering portion to the area of ​​the light-emitting region of the light-emitting portion corresponding to the fourth filter portion is smaller than a reference value, the thickness of the first sub-filtering portion is greater than or equal to the thickness of the second filter portion.

[0016] According to any display panel described in the present disclosure, the fourth filter part also includes a second sub-filter part, the output light of the second sub-filter part has the same color as the output light of the first filter part, and the first sub-filter part and the second sub-filter part are distributed in the same layer, or are stacked.

[0017] According to any display panel described in the present disclosure, the fourth filter section includes a third sub-filter section, and the output light of the third sub-filter section has the same color as the mixed light of the output light of the first filter section and the second filter section.

[0018] According to any one of the display panels of the present disclosure, when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting region of the light-emitting portion corresponding to the fourth filter portion is greater than or equal to a reference value, the thickness of the third sub-filter portion is less than the thickness of the first filter portion and less than the thickness of the second filter portion;

[0019] When the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the light-emitting portion corresponding to the fourth filter portion is less than a reference value, the thickness of the third sub-filter portion is greater than or equal to the thickness of the first filter portion, and greater than or equal to the thickness of the second filter portion.

[0020] According to any display panel described in the present disclosure, the fourth filtering section also includes a fourth sub-filtering section, the output light of the fourth sub-filtering section has the same color as the output light of the third filtering section, and the first sub-filtering section, the second sub-filtering section and the fourth sub-filtering section are distributed in the same layer or at least two sub-filtering sections are distributed in stacked layers.

[0021] According to any display panel described in the present disclosure, the first filter part, the second filter part, and the third filter part emit red light, green light, and blue light respectively.

[0022] According to any display panel described in the present disclosure, the area ratio of the first sub-filtering portion, the second sub-filtering portion, and the fourth sub-filtering portion is 7:2:1.

[0023] According to any display panel described in the present disclosure, the thickness ratio of the first sub-filtering portion, the second sub-filtering portion, and the fourth sub-filtering portion is 7:2:1.

[0024] According to any display panel described in the present disclosure, the light-emitting portion includes a reflective anode, and the reflectivity of the reflective anode corresponding to the first filter portion, the reflectivity of the reflective anode corresponding to the second filter portion, and the reflectivity of the reflective anode corresponding to the third filter portion are all greater than the reflectivity of the reflective anode corresponding to the fourth filter portion.

[0025] According to any display panel described in the present disclosure, the reflective anode corresponding to the first filter part, the reflective anode corresponding to the second filter part, and the reflective anode corresponding to the third filter part are all composite layers of silver and indium tin oxide, or composite layers of nickel-aluminum alloy and indium tin oxide, and the reflective anode corresponding to the fourth filter part is a composite layer of molybdenum and indium tin oxide.

[0026] According to one aspect of the present disclosure, a display device is provided, comprising the display panel described in the above aspect.

[0027] The embodiments of the present disclosure include at least the following technical effects:

[0028] In the embodiment of the present disclosure, full-color display is achieved through the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel, and the fourth filter portion included in the fourth sub-pixel can reduce the pixel reflectivity of the fourth sub-pixel, so that the pixel reflectivity of the fourth sub-pixel area is close to the pixel reflectivity of the first sub-pixel area, the pixel reflectivity of the second sub-pixel area, and the pixel reflectivity of the third sub-pixel area, that is, the luminous effects of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are close, thereby ensuring the display effect of the display panel.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0031] FIG1 is a schematic diagram of a partial top view of a display panel provided by the related art.

[0032] FIG. 2 is a schematic cross-sectional view of the display panel shown in FIG. 1 along line AA.

[0033] FIG. 3 is a schematic diagram of a curve showing reflectivity of three light-emitting portions of the display panel shown in FIG. 1 in the anode light-emitting reflective region.

[0034] FIG. 4 is a schematic diagram of a curve showing the reflectivity of the display panel shown in FIG. 1 in the light-shielding reflective area.

[0035] FIG. 5 is a schematic diagram of a curve showing the reflectivity of four light-emitting portions of the display panel shown in FIG. 1 in the anode edge reflective region.

[0036] FIG6 is a schematic diagram of a partial top view of the structure of a display panel provided in an embodiment of the present disclosure.

[0037] FIG. 7 is a schematic cross-sectional structural diagram of the display panel shown in FIG. 6 along line BB.

[0038] FIG8 is a schematic diagram of a partial top view of another display panel provided in an embodiment of the present disclosure.

[0039] FIG9 is a schematic diagram of a partial cross-sectional structure of another display panel provided in an embodiment of the present disclosure.

[0040] FIG10 is a schematic diagram of a partial top view of another display panel provided in an embodiment of the present disclosure.

[0041] FIG11 is a schematic diagram of a partial cross-sectional structure of another display panel provided in an embodiment of the present disclosure.

[0042] Figure numerals: 1. Base substrate; 2. Light-emitting layer; 3. Filter layer; 4. Light-shielding layer; 5. Thin-film encapsulation layer; 11. Substrate; 12. Driving layer; 21. First light-emitting portion; 22. Second light-emitting portion; 23. Third light-emitting portion; 24. Fourth light-emitting portion; 25. Transparent area; 211. Anode; 212. Light-emitting functional layer; 213. Cathode; 214. Pixel definition layer; 215. Reflective anode; 216. Blue functional layer; 217. Red functional layer; 218. Yellow functional layer; 31. First filter portion; 32. Second filter portion; 33. Third filter portion; 34. Fourth filter portion; 341. First sub-filter portion; 342. Second sub-filter portion; 343. Fourth sub-filter portion. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0044] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0045] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0046] Figure 1 illustrates a partial top-down structural diagram of a display panel in the related art, and Figure 2 illustrates a cross-sectional structural diagram of the display panel shown in Figure 1 along line AA. As shown in Figures 1 and 2, the display panel includes a light-emitting layer 2, a filter layer 3, and a light-shielding layer 4 located on the light-emitting side of the light-emitting layer 2. The light-emitting layer 2 includes multiple light-emitting portions that emit white light, and the filter layer 3 includes multiple filter portions (e.g., a red filter portion, a green filter portion, and a blue filter portion). The multiple filter portions are used to filter the white light entering them to allow the three primary colors used for color display to pass through (the red filter portion only transmits red light, the green filter portion only transmits green light, and the blue filter portion only transmits blue light). The light-shielding layer 4 absorbs light across the entire visible wavelength range and is distributed between any two adjacent filter portions to separate the multiple filter portions and prevent cross-coloring between the different filter portions, which could affect the display effect.

[0047] Among them, there is a first light-emitting portion 21 corresponding to the red filter portion, a second light-emitting portion 22 corresponding to the green filter portion, a third light-emitting portion 23 corresponding to the blue light-emitting portion, and a fourth light-emitting portion 24 among the multiple light-emitting portions; the red filter portion covers the corresponding first light-emitting portion 21, and transmits the red light in the white light emitted by the first light-emitting portion 21; the green filter portion covers the corresponding second light-emitting portion 22, and transmits the green light in the white light emitted by the second light-emitting portion 22; the blue filter portion covers the corresponding third light-emitting portion 23, and transmits the blue light in the white light emitted by the third light-emitting portion 23, so that full-color display is achieved through the three primary color lights emitted by multiple filter portions and the white light emitted by the fourth light-emitting portion 24.

[0048] However, researchers have discovered that the full-color display effect of the display panel described above is poor when achieving full-color display. After careful study, they found that for the first sub-pixel formed by the first light-emitting portion 21 and the corresponding red filter portion, the second sub-pixel formed by the second light-emitting portion 22 and the corresponding green filter portion, the third sub-pixel formed by the third light-emitting portion 23 and the corresponding blue filter portion, and the fourth sub-pixel formed by the fourth light-emitting portion 24, because the reflectivity of the light-emitting portions included in the first, second, third, and fourth sub-pixels is the same, and the fourth sub-pixel does not include a filter portion, the luminous effect of the fourth sub-pixel is better than the luminous effects of the first, second, and third sub-pixels. Therefore, while ensuring the luminous effects of the first, second, and third sub-pixels, the luminous effect of the fourth sub-pixel deviates from the target light color, or while ensuring the luminous effect of the fourth sub-pixel, the luminous effects of the first, second, and third sub-pixels deviate from the target light color, thereby affecting the display effect of the display panel.

[0049] Specifically, as shown in Figure 2, the light-emitting portion includes an anode 211, a light-emitting functional layer 212, a cathode 213, and a pixel definition layer 214 located between the anode 211 and the light-emitting functional layer 212 and having a pixel opening. Taking the light-emitting portion as a top emission as an example, as shown in Figure 2, a sub-pixel (taking the sub-pixel corresponding to the first light-emitting portion 21 as an example) can be divided into three reflective areas, including the anode light-emitting reflective area AA (the area surrounded by the pixel opening area), the anode edge reflective area BB (the area between the edge of the pixel opening and the edge of the light-shielding layer 4), and the light-shielding reflective area CC (the area where the light-shielding layer 4 is located).

[0050] At this time, the reflectivity of the first sub-pixel in the anode light-emitting reflective area AA is R red-sim The reflectivity of the second sub-pixel in the anode light-emitting reflective area AA is R green-sim The reflectivity of the third sub-pixel in the anode light-emitting reflective area AA is R blue-sim The reflectivity of the fourth sub-pixel in the anode light-emitting reflective area AA is R w-simThe reflectivity of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel in the anode edge reflection area BB is R PDL-sim The reflectivity of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel in the light-shielding reflection area CC is R bm-sim In addition, the transmittance of the first sub-pixel is T redCF , the transmittance of the second sub-pixel is T greenCF , the transmittance of the third sub-pixel is T blueCF The pixel aperture ratios of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel in the anode light-emitting reflective area AA are all S rgbw The area ratio of the gap portion of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in the anode edge reflection area BB is S PDL The area ratio of the light shielding layer of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in the light shielding reflection area CC is S bm .

[0051] Furthermore, for a pixel including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the pixel reflectivity of the first sub-pixel is approximately R red =R red-sim ×T redCF ×T redCF ×S rgbw ; The pixel reflectivity of the second sub-pixel is approximately R green =R green-sim ×T greenCF ×T greenCF ×S rgbw ; The pixel reflectivity of the third sub-pixel is approximately R blue =R blue-sim ×T blueCF ×T blueCF ×S rgbw ; The pixel reflectivity of the fourth sub-pixel is approximately R w =R w-sim ×S rgbw The total reflectivity of the anode edge reflection area BB is approximately R PDL =R PDL - sim ×T redCF ×T redCF ×S PDL +R PDL-sim ×T greenCF ×T greenCF ×S PDL +R PDL - sim ×T blueCF ×T blueCF ×S PDL +R PDL-sim ×SPDL The total reflectivity of the light-shielding reflection area CC is approximately R bm =R bm-sim ×S bm ×4.

[0052] Among them, taking the wavelength of the emitted light of the first sub-pixel > the wavelength of the emitted light of the second sub-pixel > the wavelength of the emitted light of the third sub-pixel as an example, that is, the first sub-pixel emits red light, the second sub-pixel emits green light, and the third sub-pixel emits blue light, at this time Figure 3 shows the pixel reflectivity curve S1 of the first sub-pixel in the anode light-emitting reflection area AA, the pixel reflectivity curve S2 of the second sub-pixel in the anode light-emitting reflection area AA, and the pixel reflectivity curve S3 of the third sub-pixel in the anode light-emitting reflection area AA, Figure 4 shows the total reflectivity curve S4 of the shading reflection area CC, and Figure 5 shows the reflectivity S5 of the first sub-pixel in the anode edge reflection area BB, the reflectivity S6 of the second sub-pixel in the anode edge reflection area BB, the reflectivity S7 of the fourth sub-pixel in the anode edge reflection area BB, and the reflectivity S8 of the third sub-pixel in the anode edge reflection area BB.

[0053] It can be seen from this that the pixel reflectivity of the fourth sub-pixel is much greater than the pixel reflectivity of the first sub-pixel, the second sub-pixel, and the third sub-pixel. The pixel reflectivity of the first sub-pixel, the second sub-pixel, and the third sub-pixel is approximately equal to the total reflectivity of the anode edge reflection area BB, and the total reflectivity of the anode edge reflection area BB is greater than the total reflectivity of the light-shielding reflection area CC; thereby, while ensuring the luminous effect of the first sub-pixel, the second sub-pixel, and the third sub-pixel, the luminous effect of the fourth sub-pixel deviates from the target light color, or while ensuring the luminous effect of the fourth sub-pixel, the luminous effects of the first sub-pixel, the second sub-pixel, and the third sub-pixel deviate from the target light color.

[0054] Based on this, embodiments of the present disclosure provide a display panel. As shown in Figures 6 and 7, the display panel includes: a light-emitting layer 2 and a filter layer 3, with the filter layer 3 located on the light-emitting side of the light-emitting layer 2. The light-emitting layer 2 includes a plurality of light-emitting portions arranged in an array, and the plurality of light-emitting portions includes at least a light-emitting portion that emits white light. The filter layer 3 includes a plurality of filter portions corresponding to the plurality of light-emitting portions. The plurality of filter portions includes a first filter portion 31, a second filter portion 32, a third filter portion 33, and a fourth filter portion 34, with the light-emitting portions corresponding to the fourth filter portion 34 emitting white light. In a direction perpendicular to the display panel, the first filter portion 31, the second filter portion 32, and the third filter portion 33 all cover the corresponding light-emitting portions, and the fourth filter portion 34 at least partially overlaps the corresponding light-emitting portion. The first filter portion 31 is configured to emit a first color light, the second filter portion 32 is configured to emit a second color light, the third filter portion 33 is configured to emit a third color light, and the fourth filter portion 34 is configured to emit white light.

[0055] Among them, the multiple light-emitting sections include a first light-emitting section 21 corresponding to the first filter section 31, a second light-emitting section 22 corresponding to the second filter section 32, a third light-emitting section 23 corresponding to the third filter section 33, and a fourth light-emitting section 24 corresponding to the fourth filter section 34 (emitting white light), and the first light-emitting section 21 and the corresponding first filter section 31 form a first sub-pixel, the second light-emitting section 22 and the corresponding second filter section 32 form a second sub-pixel, the third light-emitting section 23 and the corresponding third filter section 33 form a third sub-pixel, and the fourth light-emitting section 24 and the corresponding fourth filter section 34 form a fourth sub-pixel.

[0056] In this way, the display panel provided by the present disclosure can emit the first color light through the first sub-pixel, emit the second color light through the second sub-pixel, emit the third color light through the third sub-pixel, and emit white light through the fourth sub-pixel to achieve full-color display of the display panel; in addition, through the setting of the fourth filter part 34, the pixel reflectivity of the fourth sub-pixel is reduced, so that the pixel reflectivity of the fourth sub-pixel area is close to the pixel reflectivity of the first sub-pixel area, the pixel reflectivity of the second sub-pixel area, and the pixel reflectivity of the third sub-pixel area, that is, the luminous effects of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are close, thereby ensuring the display effect of the display panel.

[0057] In the embodiment of the present disclosure, the light-emitting layer 2 includes a plurality of light-emitting units distributed in an array, and each light-emitting unit includes a first light-emitting portion 21, a second light-emitting portion 22, a third light-emitting portion 23 and a fourth light-emitting portion 24 to achieve full-color lighting of each light-emitting unit.

[0058] As shown in FIG. 7 , the light-emitting portion includes an anode 211 , a light-emitting functional layer 212 , a cathode 213 , and a pixel definition layer 214 located between the anode 211 and the light-emitting functional layer 212 .

[0059] Among them, for the top-emitting light-emitting portion, the cathode 213 can be a transparent film layer (transparent cathode 213), and the anode 211 can be a reflective film layer (i.e., the reflective anode 215 as shown in Figure 7), so that after the light-emitting functional layer 212 emits light, it can pass through the cathode 213 under the reflection action of the anode 211; for the bottom-emitting light-emitting portion, the cathode 213 can be a reflective film layer (reflective cathode 213), and the anode 211 can be a transparent film layer (transparent anode 211), so that after the light-emitting functional layer 212 emits light, it can pass through the anode 211 under the reflection action of the cathode 213.

[0060] Taking the light-emitting functional layer 212 emitting white light as an example, the light-emitting functional layer 212 can be a film layer structure in which the red functional layer 217, the green functional layer, and the blue functional layer 216 are stacked in sequence, or it can be a film layer structure in which the blue functional layer 216, the red functional layer 217, the yellow functional layer 218, and the blue functional layer 216 are stacked in sequence as shown in Figure 7; of course, the light-emitting functional layer 212 can also be other film layer structures, which is not limited in the embodiments of the present disclosure.

[0061] Optionally, as shown in FIG6 , the display panel further includes a light-transmitting area 25 located between two adjacent light-emitting units, so that the light-transmitting performance of the display panel can be achieved while achieving full-color display of the display panel.

[0062] In the embodiment of the present disclosure, as shown in Figure 6 or Figure 7, the display panel also includes a shading layer 4, which is on the same layer as the filter layer 3, and the shading layer 4 is distributed between two adjacent filter parts to separate the multiple filter parts to prevent cross-color from occurring between different filter parts, thereby affecting the display effect.

[0063] 7 , the display panel further includes a base substrate 1, which is located on the side of the light-emitting layer 2 close to the anode 211. In view of the above-mentioned bottom-emitting light-emitting portion, the base substrate 1 can be a transparent substrate to ensure light transmission.

[0064] The base substrate 1 may be a driving substrate, ie a silicon substrate integrated with a driving circuit, or may be as shown in FIG. 7 , including a substrate 11 and a driving layer 12 located on a side of the substrate 11 close to the light emitting layer 2 .

[0065] The material of the substrate 11 can be an inorganic material or an organic material. For example, in some embodiments, the material of the substrate 11 can be a glass material such as soda-lime glass, quartz glass, sapphire glass, or a metal material such as stainless steel, aluminum, nickel, etc. In other embodiments, the material of the substrate 11 can be polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyvinyl phenol (PVP), polyether sulfone (PES), polyimide, polyamide, polyacetal, polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or a combination thereof.

[0066] Optionally, the substrate 11 may be a composite of multiple layers in addition to a single layer. For example, in some embodiments, the substrate 11 includes a base film layer, a pressure-sensitive adhesive layer, a first polyimide layer, and a second polyimide layer stacked in sequence.

[0067] The driving layer 12 includes multiple driving circuits, one of which is electrically connected to a light-emitting portion of the light-emitting layer 2 to ensure normal light emission of the light-emitting portion. The driving circuit may include multiple transistors and capacitors.

[0068] The transistor may be a thin film transistor, which may be selected from a top-gate thin film transistor, a bottom-gate thin film transistor, or a dual-gate thin film transistor; the capacitor may be a bipolar plate capacitor or a tripolar plate capacitor; the control electrode of the thin film transistor may be made of amorphous silicon semiconductor material, low-temperature polysilicon semiconductor material, metal oxide semiconductor material, organic semiconductor material, or other types of semiconductor materials; and the thin film transistor may be an N-type thin film transistor or a P-type thin film transistor.

[0069] It is understood that among the multiple transistors included in a driver circuit, the types of any two transistors may be the same or different. For example, in some embodiments, some transistors in a driver circuit may be N-type transistors and some transistors may be P-type transistors. For example, in other embodiments, the material of the control electrode of some transistors in a driver circuit may be a low-temperature polysilicon semiconductor material, and the material of the active layer of some transistors may be a metal oxide semiconductor material.

[0070] The driving layer 12 includes an insulating buffer layer, a transistor layer, an interlayer dielectric layer, a source / drain metal layer, and a planar layer sequentially distributed in a direction away from the substrate 11. The transistor layer includes a semiconductor layer, a gate insulating layer, and a gate metal layer stacked between the substrate 11 and the interlayer dielectric layer. The positional relationship of the film layers included in the transistor layer can be determined according to the type of thin film transistor (top gate, bottom gate, or double gate). For example, the transistor layer includes a semiconductor layer, a gate insulating layer, and a gate metal layer sequentially stacked in a direction away from the substrate 11. In this case, the thin film transistor formed is a top-gate thin film transistor; or the transistor layer includes a gate metal layer, a gate insulating layer, and a semiconductor layer sequentially stacked in a direction away from the substrate 11. In this case, the thin film transistor formed is a bottom-gate thin film transistor.

[0071] In some embodiments, the material of the insulating buffer layer can be an inorganic insulating material such as silicon oxide or silicon nitride, and the insulating buffer layer can be a single layer of inorganic material or a multi-layered inorganic material layer. The semiconductor layer can be used to form the active portion (control electrode) of each transistor included in the driving circuit, and each active portion includes a channel region and two connecting portions (i.e., source and drain) located on both sides of the channel region; the semiconductor layer can be a single layer of semiconductor layer or a two-layer semiconductor layer. The gate metal layer can be used to form gate metal layer wiring such as a scan line, and can also be used to form the second plate of a capacitor; the gate metal layer can be a single layer of gate metal layer or a two-layer or three-layer gate metal layer. The source and drain metal layer can be used to form source and drain metal layer wiring such as power lines, data lines, sensing lines, and connecting lines, and can also be used to form the first plate of a capacitor. The flat layer is provided with a plurality of first vias, and the anode 211 of a light-emitting portion is connected to a driving circuit through a first via.

[0072] It is understood that when the gate metal layer or semiconductor layer is a multi-layer structure, the gate insulation layer in the transistor layer can be adaptively increased or decreased. For example, in some embodiments, the transistor layer includes a low-temperature polysilicon semiconductor layer, a gate insulation layer, a metal oxide semiconductor layer, a gate insulation layer, and a gate metal layer stacked in sequence on the substrate 11.

[0073] Optionally, the driving layer 12 further includes a passivation layer disposed between the source / drain metal layer and the planar layer, so as to protect the source / drain metal layer through the provision of the passivation layer.

[0074] In some embodiments, the display panel may further include a thin-film encapsulation layer 5. This thin-film encapsulation layer 5 is disposed on the side of the filter layer 3 closest to the light-emitting layer 2, or on the side of the filter layer 3 facing away from the light-emitting layer 2. The thin-film encapsulation layer 5 may include alternating inorganic and organic encapsulation layers. The inorganic encapsulation layer effectively blocks external moisture and oxygen, preventing moisture and oxygen from invading the light-emitting functional layer 212 of the light-emitting portion and causing material degradation. The organic encapsulation layer is positioned between two adjacent inorganic encapsulation layers to achieve planarization and reduce stress between the inorganic encapsulation layers.

[0075] The display panel has a display area and a peripheral area located outside the display area. The edge of the inorganic encapsulation layer can be located in the peripheral area, and the edge of the organic encapsulation layer can be located between the edge of the display area and the edge of the inorganic encapsulation layer. Exemplarily, the thin-film encapsulation layer 5 includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence on the side of the light-emitting layer 2 facing away from the substrate 11.

[0076] In some embodiments, the display panel may further include a touch function layer, which is disposed on a side of the thin film encapsulation layer 5 facing away from the substrate 11 , for implementing touch operation of the display panel.

[0077] In the present disclosure, for the first filter section 31, the second filter section 32, and the third filter section 33 included in the multiple filter sections, optionally, the first filter section 31 is one of the red filter section, the green filter section, and the blue filter section, the second filter section 32 is the other of the red filter section, the green filter section, and the blue filter section, and the third filter section 33 is the remaining one of the red filter section, the green filter section, and the blue filter section.

[0078] For example, the first filter section 31 is a red filter section, in which case the first subpixel is a red subpixel; the second filter section 32 is a green filter section, in which case the second subpixel is a green subpixel; and the third filter section 33 is a blue filter section, in which case the third subpixel is a blue subpixel. Of course, the first filter section 31, the second filter section 32, and the third filter section 33 can also be filters of other colors. For details, please refer to relevant technologies, as long as they are combined with the fourth filter section 34 to achieve full-color display on the display panel. For example, if the first filter section 31 is a green filter section, in which case the first subpixel is a green subpixel; the second filter section 32 is a red filter section, in which case the second subpixel is a red subpixel; and the third filter section 33 is a blue filter section, in which case the third subpixel is a blue subpixel.

[0079] In the present disclosure, for the fourth filter portion 34 , the setting type of the fourth filter portion 34 may be determined by comparing the pre-detected white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point.

[0080] In some embodiments, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is found that the white light emitted by the fourth sub-pixel is insufficient in single-color light. In this case, as shown in Figure 6 or Figure 7, the fourth filter part 34 can be set as a single-color filter part, and then the fourth filter part 34 can be set to be arranged in the same layer as one of the first filter part 31, the second filter part 32, and the third filter part 33 with the same green light color.

[0081] The following explanation is made in detail by taking the example that the first filter portion 31 is a red filter portion, the second filter portion 32 is a green filter portion, and the third filter portion 33 is a blue filter portion.

[0082] For example, a comparison of the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point reveals that the red wavelength band of the white light emitted by the fourth sub-pixel is lower than the green and blue wavelength bands, resulting in insufficient red light and causing the overall white light emitted by the fourth sub-pixel to appear bluish. In this case, considering the aforementioned situation where the first filter section 31 is a red filter, the fourth filter section 34 can be configured to include a second sub-filter section 342, with the light emitted by the second sub-filter section 342 having the same color as the light emitted by the first filter section 31. In this way, the provision of the second sub-filter section 342 can enhance the red wavelength band in the white light, ensuring sufficient red light, and thus ensuring that the spectrum of the white light after passing through the second sub-filter section 342 closely coincides with the normalized spectrum of the reference white point.

[0083] Optionally, the second sub-filtering portion 342 included in the fourth filtering portion 34 may be provided in the same layer and made of the same material as the first filtering portion 31 , thereby simplifying the manufacturing process of the second sub-filtering portion 342 .

[0084] For example, a comparison of the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point reveals that the green wavelength band of the white light emitted by the fourth sub-pixel is lower than the red and blue wavelength bands, resulting in insufficient green light and causing the overall white light emitted by the fourth sub-pixel to appear purple. In this case, considering the aforementioned situation where the second filter section 32 is a green filter, the fourth filter section 34 can be configured to include a first sub-filter section 341, with the light emitted by the first sub-filter section 341 having the same color as the light emitted by the second filter section 32. In this way, the provision of the first sub-filter section 341 can enhance the green wavelength band in the white light, ensuring sufficient green light, and thus ensuring that the spectrum of the white light after passing through the first sub-filter section 341 approximately coincides with the normalized spectrum of the reference white point.

[0085] Optionally, the first sub-filtering portion 341 included in the fourth filtering portion 34 may be provided in the same layer as the second filtering portion 32 and made of the same material, thereby simplifying the manufacturing process of the first sub-filtering portion 341 .

[0086] For example, a comparison of the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point reveals that the blue wavelength band of the white light emitted by the fourth sub-pixel is lower than the red and green wavelength bands, resulting in insufficient blue light and an overall yellowish tint to the white light emitted by the fourth sub-pixel. In this case, considering that the third filter 33 is a blue filter as described above, the fourth filter 34 can be configured to include a fourth sub-filter 343, with the light emitted by the fourth sub-filter 343 having the same color as the light emitted by the third filter 33. Thus, the provision of the fourth sub-filter 343 can enhance the blue wavelength band in the white light, ensuring sufficient blue light, and thereby ensuring that the spectrum of the white light after passing through the fourth sub-filter 343 approximately coincides with the normalized spectrum of the reference white point.

[0087] Optionally, the fourth sub-filtering portion 343 included in the fourth filtering portion 34 may be provided in the same layer and made of the same material as the third filtering portion 33 , thereby simplifying the manufacturing process of the fourth sub-filtering portion 343 .

[0088] The area and thickness of the fourth filter section 34 determine the filtering effect of the fourth filter section 34 on the white light emitted by the fourth light-emitting section 24. To ensure that the spectrum of the white light after filtering by the fourth filter section 34 is close to the normalized spectrum of the reference white point, continuing with the example of the overall purple-tinted white light emitted by the fourth sub-pixel, a correspondence table of area ratios and thickness ratios can be pre-set. Then, based on the area ratio of the fourth filter section 34 (first sub-filter section 341) to the area of ​​the corresponding light-emitting area of ​​the fourth light-emitting section 24, the thickness of the first sub-filter section 341 can be determined in combination with the thickness of the second filter section 32 to ensure that the spectrum of the white light after filtering by the first sub-filter section 341 approximately coincides with the normalized spectrum of the reference white point.

[0089] Among them, the area of ​​the first sub-filter portion 341 refers to the area of ​​the region enclosed by the edge of the first sub-filter portion 341, that is, the orthographic projection area on the base substrate 1; the light-emitting area area of ​​the fourth light-emitting portion 24 refers to the area of ​​the region enclosed by the pixel opening area of ​​the fourth light-emitting portion 24.

[0090] For example, when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is greater than or equal to a reference value, the thickness of the first sub-filter portion 341 is set to be smaller than the thickness of the second filter portion 3231; when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is less than a reference value, the thickness of the first sub-filter portion 341 is set to be greater than or equal to the thickness of the second filter portion 32.

[0091] The reference value may be greater than or equal to 30% and less than or equal to 60%. For example, the reference value may be 30%, 40%, 50%, or 60%. For example, when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is greater than or equal to 40%, the thickness of the first sub-filter portion 341 is set to be smaller than the thickness of the second filter portion 32. When the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is less than 40%, the thickness of the first sub-filter portion 341 is set to be greater than or equal to the thickness of the second filter portion 32.

[0092] For example, when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is greater than or equal to a first reference value, the thickness of the first sub-filter portion 341 is set to be less than 1 / 2 of the thickness of the second filter portion 32; when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is less than the first reference value and greater than or equal to a second reference value, the thickness of the first sub-filter portion 341 is set to be greater than or equal to 1 / 2 of the thickness of the second filter portion 32 and less than or equal to 3 / 2 of the thickness of the second filter portion 32; when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is less than the second reference value, the thickness of the first sub-filter portion 341 is set to be greater than 3 / 2 of the thickness of the second filter portion 32 and less than or equal to twice the thickness of the second filter portion 32.

[0093] Among them, the value of the first reference value can be greater than or equal to 60% and less than or equal to 80%, and the value of the second reference value can be greater than or equal to 20% and less than or equal to 40%. For example, the first reference value can be 60%, 70%, or 80%, and the second reference value can be 20%, 30%, or 40%. For example, when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is greater than or equal to 70%, the thickness of the first sub-filter portion 341 is set to be less than 1 / 2 of the thickness of the second filter portion 32; when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is less than 70% and greater than or equal to 30%, the thickness of the first sub-filter portion 341 is set to be greater than or equal to 1 / 2 of the thickness of the second filter portion 32 and less than or equal to 3 / 2 of the thickness of the second filter portion 32; when the ratio of the area of ​​the first sub-filter portion 341 to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is less than 30%, the thickness of the first sub-filter portion 341 is set to be greater than 3 / 2 of the thickness of the second filter portion 32 and less than or equal to twice the thickness of the second filter portion 32.

[0094] In other embodiments, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is found that the white light emitted by the fourth sub-pixel contains insufficient light of two colors. In this case, the fourth filter portion 34 can be set to include two sub-filter portions with different colors as shown in Figure 8 or Figure 9, or the fourth filter portion 34 can be set to include a third sub-filter portion that is a synthesis of two colors.

[0095] In the case where the fourth filter section 34 includes two sub-filter sections with different colors, that is, the fourth filter section 34 includes a second sub-filter section 342 in addition to the first sub-filter section 341 , the output light of the second sub-filter section 342 has the same color as the output light of the first filter section 31 .

[0096] The first sub-filtering portion 341 and the second sub-filtering portion 342 may be arranged in the same layer as shown in FIG. 8 , or may be arranged in stacked layers as shown in FIG. 9 .

[0097] Among them, for the two colors of light that are insufficient in the white light emitted by the fourth sub-pixel, if the light band of one color of light is lower than the light band of the other color of light, the area and / or thickness of the sub-filter portion corresponding to the one color of light can be set to be smaller than the area and / or thickness of the sub-filter portion corresponding to the other color of light, so as to ensure that the white light spectrum emitted by the fourth sub-pixel approximately coincides with the normalized spectrum of the reference white point.

[0098] The following explanation is made in detail by taking the example that the first filter portion 31 is a red filter portion, the second filter portion 32 is a green filter portion, and the third filter portion 33 is a blue filter portion.

[0099] For example, a comparison of the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point reveals that the red and green wavelengths in the white light emitted by the fourth sub-pixel are both lower than the blue wavelengths, resulting in insufficient red and green light, causing the white light emitted by the fourth sub-pixel to appear bluish overall. In this case, the fourth filter section 34 can be configured to include a first sub-filter section 341 and a second sub-filter section 342, with the light emitted by the first sub-filter section 341 having the same color as the light emitted by the second filter section 32, and the light emitted by the second sub-filter section 342 having the same color as the light emitted by the first filter section 31. Thus, the provision of the first sub-filter section 341 and the second sub-filter section 342 can enhance the red and green wavelengths in the white light, ensuring sufficient red and green light, and thereby ensuring that the spectrum of the white light after passing through the first sub-filter section 341 and the second sub-filter section 342 approximately coincides with the normalized spectrum of the reference white point.

[0100] Optionally, the first sub-filtering portion 341 of the fourth filter portion 34 can be disposed in the same layer and made of the same material as the second filter portion 32, and the second sub-filtering portion 342 can be disposed in the same layer and made of the same material as the first filter portion 31. This simplifies the manufacturing process of the first sub-filtering portion 341 and the second sub-filtering portion 342.

[0101] If the wavelength of the red light band is lower than that of the green light band, the area and / or thickness of the second sub-filter portion 341 may be set to be smaller than that of the first sub-filter portion 341. If the wavelength of the red light band is higher than that of the green light band, the area and / or thickness of the second sub-filter portion 342 may be set to be larger than that of the first sub-filter portion 341.

[0102] For example, a comparison of the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point reveals that the red and blue wavelengths in the white light emitted by the fourth sub-pixel are both lower than the green wavelengths, resulting in insufficient red and blue light, causing the white light emitted by the fourth sub-pixel to appear greenish overall. In this case, the fourth filter section 34 can be configured to include a second sub-filter section 342 and a fourth sub-filter section 343, with the light emitted by the second sub-filter section 342 having the same color as the light emitted by the first filter section 31, and the light emitted by the fourth sub-filter section 343 having the same color as the light emitted by the third filter section 33. Thus, the provision of the second sub-filter section 342 and the fourth sub-filter section 343 can enhance the red and blue wavelengths in the white light, ensuring sufficient red and blue light, and thereby ensuring that the spectrum of the white light after passing through the second sub-filter section 342 and the fourth sub-filter section 343 approximately coincides with the normalized spectrum of the reference white point.

[0103] Optionally, the second sub-filtering portion 342 included in the fourth filtering portion 34 can be provided in the same layer and made of the same material as the first filtering portion 31, and the fourth sub-filtering portion 343 can be provided in the same layer and made of the same material as the third filtering portion 33. This simplifies the manufacturing process of the second sub-filtering portion 342 and the fourth sub-filtering portion 343.

[0104] Among them, if the red light band is lower than the blue light band, the area and / or thickness of the second sub-filter portion 342 can be set to be smaller than the area and / or thickness of the fourth sub-filter portion 343. If the red light band is higher than the blue light band, the area and / or thickness of the second sub-filter portion 342 can be set to be larger than the area and / or thickness of the fourth sub-filter portion 343.

[0105] For example, a comparison of the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point reveals that the green and blue wavelengths in the white light emitted by the fourth sub-pixel are both lower than the red wavelength, resulting in insufficient green and blue light, causing the white light emitted by the fourth sub-pixel to be reddish overall. In this case, the fourth filter section 34 can be configured to include a first sub-filter section 341 and a fourth sub-filter section 343, with the light emitted by the first sub-filter section 341 having the same color as the light emitted by the second filter section 32, and the light emitted by the fourth sub-filter section 343 having the same color as the light emitted by the third filter section 33. Thus, the provision of the first sub-filter section 341 and the fourth sub-filter section 343 can enhance the green and blue wavelengths in the white light, ensuring sufficient green and blue light, and thereby ensuring that the spectrum of the white light after passing through the first sub-filter section 341 and the fourth sub-filter section 343 approximately coincides with the normalized spectrum of the reference white point.

[0106] Optionally, the first sub-filtering portion 341 included in the fourth filtering portion 34 can be provided in the same layer and made of the same material as the second filtering portion 32, and the fourth sub-filtering portion 343 can be provided in the same layer and made of the same material as the third filtering portion 33. This simplifies the manufacturing process of the first sub-filtering portion 341 and the fourth sub-filtering portion 343.

[0107] If the wavelength of green light is lower than that of blue light, the area and / or thickness of the first sub-filter portion 341 may be set to be smaller than the area and / or thickness of the fourth sub-filter portion 343. If the wavelength of green light is higher than that of blue light, the area and / or thickness of the first sub-filter portion 341 may be set to be larger than the area and / or thickness of the fourth sub-filter portion 343.

[0108] In the case where the fourth filtering section 34 includes the third sub-filtering section, the light emitted by the third sub-filtering section has the same color as the mixed light of the light emitted by the first filtering section 31 and the second filtering section 32 .

[0109] The area and thickness of the third sub-filtering portion determine the filtering effect on the colored light in the white light emitted by the fourth light-emitting portion 24. To ensure that the spectrum of the white light after filtering by the third sub-filtering portion is close to the normalized spectrum of the reference white point, continuing with the example of the overall bluish white light emitted by the fourth sub-pixel, a correspondence table of area ratios and thickness ratios can be pre-set. Then, based on the area ratio of the third sub-filtering portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24, the thickness of the first filter portion 31 and the thickness of the second filter portion 32 are determined to ensure that the spectrum of the white light after filtering by the third sub-filtering portion approximately coincides with the normalized spectrum of the reference white point.

[0110] For example, when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is greater than or equal to a reference value, the thickness of the third sub-filter portion is set to be less than the thickness of the first filter portion 31 and less than the thickness of the second filter portion 32; when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is less than the reference value, the thickness of the third sub-filter portion is set to be greater than or equal to the thickness of the first filter portion 31 and greater than or equal to the thickness of the second filter portion 32.

[0111] The values ​​of the reference values ​​may refer to those described in the above embodiments. For example, when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is greater than or equal to 40%, the thickness of the third sub-filter portion is set to be less than the thickness of the first filter portion 31 and less than the thickness of the second filter portion 32. When the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is less than 40%, the thickness of the third sub-filter portion is set to be greater than or equal to the thickness of the first filter portion 31 and greater than or equal to the thickness of the second filter portion 32.

[0112] For example, when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting region of the fourth light-emitting portion 24 is greater than or equal to the first reference value, the thickness of the third sub-filter portion is set to be less than 1 / 2 of the thickness of the first filter portion 31 and less than 1 / 2 of the thickness of the first filter portion 31; when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting region of the fourth light-emitting portion is less than the first reference value and greater than or equal to the second reference value, the thickness of the third sub-filter portion is set to be greater than or equal to 1 / 2 of the thickness of the first filter portion 31 and less than or equal to the first reference value. 3 / 2 of the thickness of the filtering portion 31, and greater than or equal to 1 / 2 of the thickness of the second filtering portion 32 and less than or equal to 3 / 2 of the thickness of the second filtering portion 32; when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is less than the second reference value, the thickness of the third sub-filter portion is set to be greater than 3 / 2 of the thickness of the first filtering portion 31 and less than or equal to 2 times the thickness of the first filtering portion 31, and greater than 3 / 2 of the thickness of the second filtering portion 32 and less than or equal to 2 times the thickness of the second filtering portion 32.

[0113] The values ​​of the first reference value and the second reference value may refer to the above-mentioned embodiment. For example, when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is greater than or equal to 60%, the thickness of the third sub-filter portion is set to be less than 1 / 2 of the thickness of the first filter portion 31 and less than 1 / 2 of the thickness of the first filter portion 31; when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is less than 60% and greater than or equal to 30%, the thickness of the third sub-filter portion is set to be greater than or equal to 1 / 2 of the thickness of the first filter portion 31 and less than or equal to the thickness of the first filter portion. 31, and is greater than or equal to 1 / 2 of the thickness of the second filter portion 32 and less than or equal to 3 / 2 of the thickness of the second filter portion 32; when the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting area of ​​the fourth light-emitting portion 24 is less than 30%, the thickness of the third sub-filter portion is set to be greater than 3 / 2 of the thickness of the first filter portion 31 and less than or equal to 2 times the thickness of the first filter portion 31, and greater than 3 / 2 of the thickness of the second filter portion 32 and less than or equal to 2 times the thickness of the second filter portion 32.

[0114] In some other embodiments, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is found that the white light spectrum emitted by the fourth sub-pixel basically coincides with the normalized spectrum of the reference white point. At this time, in order to achieve a pixel reflectivity of the fourth sub-pixel close to the pixel reflectivity of the first sub-pixel, the pixel reflectivity of the second sub-pixel, and the pixel reflectivity of the third sub-pixel, the fourth filter section 34 can be set as shown in Figure 10 or Figure 11. In addition to the first sub-filter section 341 and the second sub-filter section 342, the fourth sub-filter section 343 is also included. The output light of the fourth sub-filter section 343 has the same color as the output light of the third filter section 33.

[0115] In this way, by configuring the first sub-filter portion 341, the second sub-filter portion 342, and the fourth sub-filter portion 343, it is possible to avoid affecting the white light effect emitted by the fourth sub-pixel, thereby ensuring that the white light spectrum emitted by the fourth sub-pixel approximately coincides with the normalized spectrum of the reference white point. At the same time, it is ensured that the pixel reflectivity of the fourth sub-pixel is close to the pixel reflectivity of the first sub-pixel, the pixel reflectivity of the second sub-pixel, and the pixel reflectivity of the third sub-pixel, thereby ensuring the display effect of the display panel.

[0116] The first sub-filter section 341, the second sub-filter section 342, and the fourth sub-filter section 343 can be arranged in the same layer as shown in FIG10, or can be arranged in a stacked layer as shown in FIG11. Of course, any two of the three sub-filter sections can also be stacked. For example, the first sub-filter section 341, the second sub-filter section 342, and the fourth sub-filter section 343 are respectively a green sub-filter section, a red sub-filter section, and a blue sub-filter section. In this case, the first sub-filter section 341 is arranged in the same layer as the second filter section 32, the second sub-filter section 342 is arranged in the same layer as the first filter section 31, and the fourth sub-filter section 343 is arranged in the same layer as the third filter section 33.

[0117] When the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 are arranged in the same layer, the area of ​​each sub-filter determines its light filtering effect. Considering that the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 are respectively the green sub-filter, the red sub-filter, and the blue sub-filter, to prevent the arrangement of the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 from affecting the white light effect emitted by the fourth sub-pixel, the area ratio of the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 is set according to the red, green, and blue color ratio. For example, the area ratio of the first sub-filtering portion 341, the second sub-filtering portion 342, and the fourth sub-filtering portion 343 can be set to 7:2:1; or the area ratio of the first sub-filtering portion 341, the second sub-filtering portion 342, and the fourth sub-filtering portion 343 can be set to 6:3:1.

[0118] When the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 are stacked and arranged, the thickness of each sub-filter determines its light filtering effect. Considering that the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 are respectively the green sub-filter, the red sub-filter, and the blue sub-filter, to prevent the arrangement of the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 from affecting the white light effect emitted by the fourth sub-pixel, the thickness ratios of the first sub-filter 341, the second sub-filter 342, and the fourth sub-filter 343 are set according to the red, green, and blue color ratios. For example, the thickness ratio of the first sub-filtering portion 341, the second sub-filtering portion 342, and the fourth sub-filtering portion 343 can be set to 7:2:1; or the thickness ratio of the first sub-filtering portion 341, the second sub-filtering portion 342, and the fourth sub-filtering portion 343 can be set to 6:3:1.

[0119] In the embodiment of the present disclosure, in combination with the above, the light-emitting portion included in the light-emitting layer 2 can be a top emission structure or a bottom emission structure. The following explanation will be made using top emission as an example.

[0120] In combination with the above description, the first filter section 31 corresponds to the first light-emitting section 21, the second filter section 32 corresponds to the second light-emitting section 22, the third filter section 33 corresponds to the third light-emitting section 23, and the fourth filter section 34 corresponds to the fourth light-emitting section 24. In this case, the reflectivity of the reflective anode 215 included in the first light-emitting section 21, the reflectivity of the reflective anode 215 included in the second light-emitting section 22, the reflectivity of the reflective anode 215 included in the third light-emitting section 23, and the reflectivity of the reflective anode 215 included in the fourth light-emitting section 24 can be the same, that is, the material of the reflective anode 215 of each of the multiple light-emitting sections included in the light-emitting layer 2 is the same. For example, the reflective anode 215 included in the first light-emitting section 21, the reflective anode 215 included in the second light-emitting section 22, the reflective anode 215 included in the third light-emitting section 23, and the reflective anode 215 included in the fourth light-emitting section 24 are all composite layers of silver and indium tin oxide, or composite layers of nickel-aluminum alloy and indium tin oxide.

[0121] Of course, the reflectivity of the reflective anode 215 included in the first light-emitting portion 21, the reflectivity of the reflective anode 215 included in the second light-emitting portion 22, and the reflectivity of the reflective anode 215 included in the third light-emitting portion 23 can also be set to be greater than the reflectivity of the reflective anode 215 included in the fourth light-emitting portion 24, that is, the reflectivity of the reflective anode 215 corresponding to the first filter portion 31, the reflectivity of the reflective anode 215 corresponding to the second filter portion 32, and the reflectivity of the reflective anode 215 corresponding to the third filter portion 33 are all greater than the reflectivity of the reflective anode 215 corresponding to the fourth filter portion 34.

[0122] In this way, by setting the emissivity of the first light-emitting portion 21, the reflectivity of the second light-emitting portion 22, and the reflectivity of the third light-emitting portion 23 to be greater than the reflectivity of the fourth light-emitting portion 24, the pixel reflectivity of the fourth sub-pixel is reduced. On the basis of ensuring the full-color display of the display panel, the luminous effects of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are close, thereby ensuring the display effect of the display panel.

[0123] Optionally, the reflectivity of the reflective anode 215 included in the first light-emitting portion 21, the reflectivity of the reflective anode 215 included in the second light-emitting portion 22, and the reflectivity of the reflective anode 215 included in the third light-emitting portion 23 may be the same. For example, the reflective anode 215 corresponding to the first filter portion 31, the reflective anode 215 corresponding to the second filter portion 32, and the reflective anode 215 corresponding to the third filter portion 33 are all composite layers of silver and indium tin oxide, or composite layers of nickel-aluminum alloy and indium tin oxide; the reflectivity of the reflective anode 215 included in the fourth light-emitting portion 24 is less than the reflectivity of the reflective anode 215 included in the first light-emitting portion 21. For example, the reflective anode 215 corresponding to the fourth filter portion 34 is a composite layer of molybdenum and indium tin oxide.

[0124] The present disclosure also provides a method for manufacturing a display panel, which is used to manufacture the display panel described in the above embodiment. The method includes the following steps S110 to S120.

[0125] Step S110 , manufacturing a light-emitting layer, wherein the light-emitting layer includes a plurality of light-emitting portions distributed in an array, and the plurality of light-emitting portions at least includes a light-emitting portion emitting white light.

[0126] Step S120: forming a filter layer on the light-emitting side of the light-emitting layer, wherein the filter layer includes a plurality of filter portions corresponding to the plurality of light-emitting portions;

[0127] Among them, the multiple filtering parts include a first filtering part, a second filtering part, a third filtering part and a fourth filtering part, and the light-emitting part corresponding to the fourth filtering part emits white light. In the direction perpendicular to the display panel, the first filtering part, the second filtering part and the third filtering part all cover the corresponding light-emitting part, and the fourth filtering part at least partially overlaps with the corresponding light-emitting part. The first filtering part is configured to emit a first color light, the second filtering part is configured to emit a second color light, the third filtering part is configured to emit a third color light, and the fourth filtering part is configured to emit white light.

[0128] Furthermore, before step S110, a base substrate is provided, and then in step S110, a light-emitting layer is formed on one side of the base substrate. Step S120 also includes: forming a light-shielding layer on the light-emitting side of the light-emitting layer, and the light-shielding layer is distributed between two adjacent filter parts.

[0129] The display panel manufactured by the manufacturing method provided in the present disclosure can achieve full-color display through the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel, and the fourth filter portion included in the fourth sub-pixel can reduce the pixel reflectivity of the fourth sub-pixel, so that the pixel reflectivity of the fourth sub-pixel area is close to the pixel reflectivity of the first sub-pixel area, the pixel reflectivity of the second sub-pixel area, and the pixel reflectivity of the third sub-pixel area, that is, the luminous effects of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are close, thereby ensuring the display effect of the display panel.

[0130] It should be noted that although the above description of the steps of the method for manufacturing a display panel in the present disclosure is described in a specific order, this does not require or imply that the steps must be performed in this specific order, or that all steps must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0131] An embodiment of the present disclosure further provides a display device, which includes the display panel described in the above embodiment.

[0132] In the present disclosure, in combination with the display panel described above, a fourth filter portion is provided that overlaps with the fourth light-emitting portion, so that the light-emitting effects of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are close, thereby ensuring the full-color display effect of the display device.

[0133] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A display panel, characterized in that: include: The light-emitting layer comprises a plurality of light-emitting portions distributed in an array, wherein the plurality of light-emitting portions at least comprises a light-emitting portion emitting white light; A filter layer, located at the light-emitting side of the light-emitting layer, and comprising a plurality of filter parts corresponding to the plurality of light-emitting parts one by one; Among them, the multiple filtering sections include a first filtering section, a second filtering section, a third filtering section and a fourth filtering section, and the light-emitting section corresponding to the fourth filtering section emits white light. In a direction perpendicular to the display panel, the first filtering section, the second filtering section and the third filtering section all cover the corresponding light-emitting section, and the fourth filtering section at least partially overlaps with the corresponding light-emitting section. The first filtering section is configured to emit a first color light, the second filtering section is configured to emit a second color light, the third filtering section is configured to emit a third color light, and the fourth filtering section is configured to emit white light.

2. The display panel according to claim 1, wherein: The fourth filter section includes a first sub-filter section, and the output light of the first sub-filter section has the same color as the output light of the second filter section.

3. The display panel according to claim 2, wherein: The first sub-filtering part and the second sub-filtering part are arranged in the same layer and made of the same material.

4. The display panel according to claim 2, wherein: When the ratio of the area of ​​the first sub-filtering portion to the light-emitting area of ​​the light-emitting portion corresponding to the fourth filter portion is greater than or equal to a reference value, the thickness of the first sub-filtering portion is less than the thickness of the second filter portion; When the ratio of the area of ​​the first sub-filter portion to the area of ​​the light-emitting region of the light-emitting portion corresponding to the fourth filter portion is smaller than a reference value, the thickness of the first sub-filter portion is greater than or equal to the thickness of the second filter portion.

5. The display panel according to claim 2, wherein: The fourth filter section further includes a second sub-filter section, the output light of the second sub-filter section has the same color as the output light of the first filter section, and the first sub-filter section and the second sub-filter section are distributed in the same layer or in stacked layers.

6. The display panel according to claim 1, wherein: The fourth filter section includes a third sub-filter section, and the output light of the third sub-filter section has the same color as the mixed light of the output light of the first filter section and the second filter section.

7. The display panel according to claim 6, wherein: When the ratio of the area of ​​the third sub-filtering portion to the area of ​​the light-emitting region of the light-emitting portion corresponding to the fourth filter portion is greater than or equal to a reference value, the thickness of the third sub-filtering portion is less than the thickness of the first filter portion, and less than the thickness of the second filter portion; When the ratio of the area of ​​the third sub-filter portion to the area of ​​the light-emitting region of the light-emitting portion corresponding to the fourth filter portion is less than a reference value, the thickness of the third sub-filter portion is greater than or equal to the thickness of the first filter portion, and greater than or equal to the thickness of the second filter portion.

8. The display panel according to claim 5, wherein: The fourth filter section further includes a fourth sub-filter section, the output light of the fourth sub-filter section has the same color as the output light of the third filter section, and the first sub-filter section, the second sub-filter section and the fourth sub-filter section are arranged in the same layer or at least two sub-filter sections are arranged in stacked layers.

9. The display panel according to claim 8, wherein: The first filter section, the second filter section, and the third filter section emit red light, green light, and blue light respectively.

10. The display panel according to claim 9, wherein: The area ratio of the first sub-filtering portion, the second sub-filtering portion, and the fourth sub-filtering portion is 7:2:

1.

11. The display panel according to claim 9, wherein: The thickness ratio of the first sub-filtering portion, the second sub-filtering portion, and the fourth sub-filtering portion is 7:2:

1.

12. The display panel according to claim 1, wherein: The light emitting part includes a reflective anode, and the reflectivity of the reflective anode corresponding to the first filter part, the reflectivity of the reflective anode corresponding to the second filter part, and the reflectivity of the reflective anode corresponding to the third filter part are all greater than the reflectivity of the reflective anode corresponding to the fourth filter part.

13. The display panel according to claim 12, wherein: The reflective anode corresponding to the first filter part, the reflective anode corresponding to the second filter part, and the reflective anode corresponding to the third filter part are all composite layers of silver and indium tin oxide, or composite layers of nickel aluminum alloy and indium tin oxide, and the reflective anode corresponding to the fourth filter part is a composite layer of molybdenum and indium tin oxide.

14. A display device, characterized in that: A display panel comprising any one of claims 1-13.

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