CN221829383U - Display panel and display device - Google Patents

Abstract

The present disclosure provides a display panel and a display device, which relate to the field of display technology. The display panel includes: a light-emitting layer, including a plurality of light-emitting parts that emit white light; a filter layer, located on the light-emitting side of the light-emitting layer, and including a plurality of filter parts; the plurality of filter parts include a first filter part, a second filter part, a third filter part, and a fourth filter part, the first filter part is configured to emit a first color light, the second filter part is configured to emit a second color light, the third filter part is configured to emit a third color light, and the fourth filter part is configured to emit white light. 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 pixel reflectivity of the fourth sub-pixel is reduced by the fourth filter part, so that the pixel reflectivity of the fourth sub-pixel area is close to the pixel reflectivity of other sub-pixel areas, that is, the luminous effects of each sub-pixel are close, thereby ensuring the display effect.

Description

Display panel and display device

Technical Field

The present disclosure relates to the field of display technology, and in particular to a display panel and a display device.

Background Art

With the continuous development of display technology, people have higher and higher requirements for the picture 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.

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 the prior art known to ordinary technicians in the field.

Utility Model Content

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.

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

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.

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.

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.

According to any display panel described in 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;

When the ratio of the area of the first sub-filter portion to the light-emitting area 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.

According to any display panel described in the present disclosure, the fourth filter section also 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 are stacked.

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 is the same color as the mixed light of the output light of the first filter section and the second filter section.

According to any display panel described in 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;

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.

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.

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

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.

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.

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.

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.

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

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

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.

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 present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings herein are incorporated into the specification 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 accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

FIG. 1 is a schematic diagram of a partial top view of a display panel provided by the related art.

FIG. 2 is a schematic diagram of a cross-sectional structure of the display panel shown in FIG. 1 along a section line.

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.

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.

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.

FIG. 6 is a schematic diagram of a partial top view of a display panel provided in an embodiment of the present disclosure.

FIG7 is a schematic diagram of the cross-sectional structure of the display panel shown in FIG6 along line B-B.

FIG. 8 is a partial top view of another display panel provided in an embodiment of the present disclosure.

FIG. 9 is a schematic diagram of a partial cross-sectional structure of another display panel provided in an embodiment of the present disclosure.

FIG. 10 is a schematic diagram of a partial top view of another display panel provided in an embodiment of the present disclosure.

FIG. 11 is a schematic diagram of a partial cross-sectional structure of another display panel provided in an embodiment of the present disclosure.

Reference numerals:

1. 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 part; 22. second light-emitting part; 23. third light-emitting part; 24. fourth light-emitting part; 25. light-transmitting 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 section; 32. Second filter section; 33. Third filter section; 34. Fourth filter section; 341. First sub-filter section; 342. Second sub-filter section; 343. Fourth sub-filter section.

DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

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 an open-ended inclusive meaning and mean that additional elements/components/etc. may exist in addition to the listed elements/components/etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

FIG1 illustrates a schematic diagram of a partial top view structure of a display panel in the related art, and FIG2 illustrates a schematic diagram of a cross-sectional structure of the display panel shown in FIG1 along the A-A line. As shown in FIG1 and FIG2, the display panel includes a light-emitting layer 2, and 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 a plurality of light-emitting parts that emit white light, and the filter layer 3 includes a plurality of filter parts (e.g., a red filter part, a green filter part, and a blue filter part), and the plurality of filter parts are used to filter the white light entering therein so that the three primary colors used for color display can pass through (the red filter part can only pass red light, the green filter part can only pass green light, and the blue filter part can only pass blue light); the light-shielding layer 4 has the function of absorbing light in all visible bands, and the light-shielding layer 4 is distributed between any two adjacent filter parts to separate the plurality of filter parts to prevent cross-coloring between different filter parts and affect the display effect.

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

As for the display panel described above, the researchers found that the full-color display effect is poor when achieving full-color display. After careful study, it was 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, since the reflectivity of the light-emitting portions included in the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel is the same, and the fourth sub-pixel does not include a filter portion, the light-emitting effect of the fourth sub-pixel is better than the light-emitting effect of the first sub-pixel, the second sub-pixel and the third sub-pixel. Therefore, while ensuring the light-emitting effect of the first sub-pixel, the second sub-pixel and the third sub-pixel, the light-emitting effect of the fourth sub-pixel deviates from the target light color, or while ensuring the light-emitting effect of the fourth sub-pixel, the light-emitting effect of the first sub-pixel, the second sub-pixel and the third sub-pixel deviates from the target light color, thereby affecting the display effect of the display panel.

Specifically, as shown in FIG2 , 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 FIG2 , a sub-pixel (taking the sub-pixel corresponding to the first light-emitting portion 21 as an example) can be divided into three reflection areas, including an anode light-emitting reflection area AA (an area surrounded by a pixel opening area), an anode edge reflection area BB (an area between the edge of the pixel opening and the edge of the light-shielding layer 4), and a light-shielding reflection area CC (an area where the light-shielding layer 4 is located).

At this time, the reflectivity of the first sub-pixel in the anode light emitting reflection area AA is R _red-sim , the reflectivity of the second sub-pixel in the anode light emitting reflection area AA is R _green-sim , the reflectivity of the third sub-pixel in the anode light emitting reflection area AA is R _blue-sim , the reflectivity of the fourth sub-pixel in the anode light emitting reflection area AA is R _w-sim , the 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 , and 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 , and 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 reflection area AA are all S _rgbw , and the gap area ratios 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 are all S _PDL , the light shielding area ratios 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 are all S _bm .

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 ×S _PDL ; the total reflectivity of the light-shielding reflection area CC is approximately R _bm =R _bm-sim ×S _bm ×4.

Among them, taking the case where the wavelength of the emitted light of the first sub-pixel is greater than the wavelength of the emitted light of the second sub-pixel and greater than 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.

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, and 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 shading reflection area CC; thereby causing the light-emitting effect of the fourth sub-pixel to deviate from the target light color while ensuring the light-emitting effect of the first sub-pixel, the second sub-pixel, and the third sub-pixel, or causing the light-emitting effects of the first sub-pixel, the second sub-pixel, and the third sub-pixel to deviate from the target light color while ensuring the light-emitting effect of the fourth sub-pixel.

Based on this, the embodiment of the present disclosure provides a display panel. As shown in Figures 6 and 7, the display panel includes: a light-emitting layer 2 and a filter layer 3, and the filter layer 3 is located on the light-emitting side of the light-emitting layer 2. The light-emitting layer 2 includes a plurality of light-emitting parts distributed in an array, and the plurality of light-emitting parts at least includes a light-emitting part that emits white light, and the filter layer 3 includes a plurality of filter parts corresponding to the plurality of light-emitting parts one by one; the plurality of filter parts include a first filter part 31, a second filter part 32, a third filter part 33 and a fourth filter part 34, and the light-emitting part corresponding to the fourth filter part 34 emits white light, in a direction perpendicular to the display panel, the first filter part 31, the second filter part 32, and the third filter part 33 all cover the corresponding light-emitting part, the fourth filter part 34 at least partially overlaps with the corresponding light-emitting part, the first filter part 31 is configured to emit a first color light, the second filter part 32 is configured to emit a second color light, the third filter part 33 is configured to emit a third color light, and the fourth filter part 34 is configured to emit white light.

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 (emitting white light) corresponding to the fourth filter section 34, 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.

In this way, the display panel provided by the present invention 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, so as 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.

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 light emission of each light-emitting unit.

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 .

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 2151 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 effect 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 effect of the cathode 213.

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

Optionally, as shown in FIG. 6 , 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 through the arrangement of the light-transmitting area 25 .

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 in 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 and affect the display effect.

In the embodiment of the present disclosure, as shown in Fig. 7, the display panel further comprises 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 emission of the light emitting portion, the base substrate 1 can be a transparent substrate to ensure the transmission of light.

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 .

The material of the substrate 11 may be an inorganic material or an organic material. For example, in some embodiments, the material of the substrate 11 may 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 may 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.

Optionally, the substrate 11 may be a composite of multiple layers of materials in addition to a single layer of material. 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.

The driving layer 12 includes a plurality of 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 a plurality of transistors and capacitors.

Among them, the transistor can be a thin film transistor, and the thin film transistor can be selected from a top-gate thin film transistor, a bottom-gate thin film transistor or a double-gate thin film transistor; the capacitor can be a bipolar plate capacitor or a tripolar plate capacitor. The material of the control electrode of the thin film transistor can be an amorphous silicon semiconductor material, a low-temperature polycrystalline silicon semiconductor material, a metal oxide semiconductor material, an organic semiconductor material or other types of semiconductor materials; the thin film transistor can be an N-type thin film transistor or a P-type thin film transistor.

It is understandable that among the multiple transistors included in a driving circuit, the types of any two transistors may be the same or different. By way of example, in some embodiments, some transistors in a driving circuit may be N-type transistors and some transistors may be P-type transistors. By way of example, in other embodiments, the material of the control electrode of some transistors in a driving 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.

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, and 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 each film layer 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, and the thin film transistor formed at this time 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, and the thin film transistor formed at this time is a bottom-gate thin film transistor.

In some embodiments, the material of the insulating buffer layer may be an inorganic insulating material such as silicon oxide or silicon nitride, and the insulating buffer layer may be a single layer of inorganic material or a plurality of layers of inorganic material stacked together. The semiconductor layer may 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., a source electrode and a drain electrode) located on both sides of the channel region; the semiconductor layer may be a single layer of semiconductor layer or a double layer of semiconductor layer. The gate metal layer may be used to form gate metal layer wiring such as a scan line, and may also be used to form the second electrode plate of a capacitor; the gate metal layer may be a single layer of gate metal layer or a double or triple layer of gate metal layer. The source-drain metal layer may be used to form source-drain metal layer wiring such as a power line, a data line, a sensing line, and a connecting line, and may also be used to form the first electrode plate of a capacitor. The flat layer is provided with a plurality of first vias, and an anode 211 of a light-emitting portion is connected to a driving circuit through a first via.

It is understandable that when the gate metal layer or the semiconductor layer is a multi-layer structure, the gate insulating layer in the transistor layer can be adaptively increased or decreased. Exemplarily, in some embodiments, the transistor layer includes a low-temperature polysilicon semiconductor layer, a gate insulating layer, a metal oxide semiconductor layer, a gate insulating layer, and a gate metal layer stacked in sequence on the substrate 11.

Optionally, the driving layer 12 further includes a passivation layer disposed between the source-drain metal layer and the planar layer, so that the source-drain metal layer is protected by the provision of the passivation layer.

In some embodiments, the display panel may further include a thin film encapsulation layer 5. The thin film encapsulation layer 5 is disposed on the side of the filter layer 3 close to the light-emitting layer 2, or on the side of the filter layer 3 away from the light-emitting layer 2; the thin film encapsulation layer 5 may include an inorganic encapsulation layer and an organic encapsulation layer alternately stacked. The inorganic encapsulation layer can effectively block external moisture and oxygen, and prevent water and oxygen from invading the light-emitting functional layer 212 of the light-emitting portion, which may cause material degradation. The organic encapsulation layer is located between two adjacent inorganic encapsulation layers to achieve planarization and reduce stress between the inorganic encapsulation layers.

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 sequentially stacked on the side of the light-emitting layer 2 away from the substrate 11.

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 , and is used to implement touch operation of the display panel.

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.

For example, the first filter section 31 is a red filter section, and the first sub-pixel is a red sub-pixel; the second filter section 32 is a green filter section, and the second sub-pixel is a green sub-pixel; the third filter section 33 is a blue filter section, and the third sub-pixel is a blue sub-pixel. 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 the relevant technology, as long as the fourth filter section 34 is combined to achieve full-color display of the display panel. For example, the first filter section 31 is a green filter section, and the first sub-pixel is a green sub-pixel; the second filter section 32 is a red filter section, and the second sub-pixel is a red sub-pixel; the third filter section 33 is a blue filter section, and the third sub-pixel is a blue sub-pixel.

In the present disclosure, for the fourth filter unit 34 , the setting type of the fourth filter unit 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.

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 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.

A detailed explanation is given by taking the above-mentioned example that the first filter part 31 is a red filter part, the second filter part 32 is a green filter part, and the third filter part 33 is a blue filter part.

For example, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is known that the red band in the white light emitted by the fourth sub-pixel is lower than the green band and the blue band, resulting in insufficient red light, causing the white light emitted by the fourth sub-pixel to be overall bluish. At this time, combined with the above-mentioned situation that the first filter section 31 is a red filter section, the fourth filter section 34 can be set to include a second sub-filter section 342, and the output light of the second sub-filter section 342 has the same color as the output light of the first filter section 31. In this way, through the setting of the second sub-filter section 342, the red light band in the white light can be increased, ensuring sufficient red light, and then ensuring that the spectrum of the white light after the second sub-filter section 342 is approximately coincident with the normalized spectrum of the reference white point.

Optionally, the second sub-filtering part 342 included in the fourth filtering part 34 may be arranged in the same layer as the first filtering part 31 and made of the same material, so as to simplify the manufacturing process of the second sub-filtering part 342 .

For example, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is known that the green band in the white light emitted by the fourth sub-pixel is lower than the red band and the blue band, resulting in insufficient green light, causing the white light emitted by the fourth sub-pixel to be purple as a whole. At this time, combined with the above-mentioned situation that the second filter section 32 is a green filter section, the fourth filter section 34 can be set to include a first sub-filter section 341, and the output light of the first sub-filter section 341 has the same color as the output light of the second filter section 32. In this way, through the setting of the first sub-filter section 341, the green light band in the white light can be increased, ensuring sufficient green light, and then ensuring that the spectrum of the white light after the first sub-filter section 341 is approximately coincident with the normalized spectrum of the reference white point.

Optionally, the first sub-filtering part 341 included in the fourth filter part 34 may be arranged in the same layer as the second filter part 32 and made of the same material, so as to simplify the manufacturing process of the first sub-filtering part 341 .

For example, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is known that the blue band in the white light emitted by the fourth sub-pixel is lower than the red band and the green band, resulting in insufficient blue light, causing the white light emitted by the fourth sub-pixel to be yellowish overall. At this time, combined with the above-mentioned situation that the third filter section 33 is a blue filter section, the fourth filter section 34 can be set to include a fourth sub-filter section 343, and the output light of the fourth sub-filter section 343 has the same color as the output light of the third filter section 33. In this way, through the setting of the fourth sub-filter section 343, the blue light band in the white light can be increased, ensuring sufficient blue light, and then ensuring that the spectrum of the white light after the fourth sub-filter section 343 is approximately coincident with the normalized spectrum of the reference white point.

Optionally, the fourth sub-filtering part 343 included in the fourth filtering part 34 may be arranged in the same layer as the third filtering part 33 and made of the same material, so as to simplify the manufacturing process of the fourth sub-filtering part 343 .

Among them, the area and thickness of the fourth filtering part 34 determine the filtering effect of the fourth filtering part 34 on the white light emitted by the fourth light-emitting part 24. In order to ensure that the spectrum of the white light after filtering by the fourth filtering part 34 is close to the normalized spectrum of the reference white point, continuing to take the example that the white light emitted by the fourth sub-pixel is overall purple, a correspondence table of area ratio and thickness ratio can be pre-set, and then the thickness of the first sub-filter part 341 is determined according to the area ratio of the fourth filtering part 34 (first sub-filter part 341) to the corresponding area of the light-emitting area of the fourth light-emitting part 24, combined with the thickness of the second filtering part 32, to ensure that the spectrum of the white light after filtering by the first sub-filter part 341 approximately coincides with the normalized spectrum of the reference white point.

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 direct 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.

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 32; 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.

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 area 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 less 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 area 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.

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 the 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 the 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 2 times the thickness of the second filter portion 32.

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 2 times the thickness of the second filter portion 32.

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 be a third sub-filter portion synthesized by two colors.

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 .

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 .

Among them, for the two colors of light with insufficient light 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.

A detailed explanation is given by taking the above-mentioned example that the first filter part 31 is a red filter part, the second filter part 32 is a green filter part, and the third filter part 33 is a blue filter part.

For example, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is known that the red band and the green band in the white light emitted by the fourth sub-pixel are both lower than the blue band, so that the red light and the green light are both insufficient, resulting in the overall blue light emitted by the fourth sub-pixel. At this time, the fourth filter section 34 can be set to include a first sub-filter section 341 and a second sub-filter section 342, and the output light of the first sub-filter section 341 has the same color as the output light of the second filter section 32, and the output light of the second sub-filter section 342 has the same color as the output light of the first filter section 31. In this way, through the setting of the first sub-filter section 341 and the second sub-filter section 342, the red light band and the green light band in the white light can be increased, and the red light and the green light are guaranteed to be sufficient, thereby ensuring that the spectrum of the white light after the first sub-filter section 341 and the second sub-filter section 342 is approximately coincident with the normalized spectrum of the reference white point.

Optionally, the first sub-filtering part 341 included in the fourth filter part 34 can be arranged in the same layer and with the same material as the second filter part 32, and the second sub-filtering part 342 can be arranged in the same layer and with the same material as the first filter part 31. In this way, the manufacturing process of the first sub-filtering part 341 and the second sub-filtering part 342 can be simplified.

Among them, if the red light band is lower than the green 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 first sub-filter portion 341; if the red light band is higher than the green 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 first sub-filter portion 341.

For example, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is known that the red band and the blue band in the white light emitted by the fourth sub-pixel are both lower than the green band, so that the red light and the blue light are insufficient, resulting in the white light emitted by the fourth sub-pixel being greenish as a whole. At this time, the fourth filter section 34 can be set to include a second sub-filter section 342 and a fourth sub-filter section 343, and the output light of the second sub-filter section 342 has the same color as the output light of the first filter section 31, and the output light of the fourth sub-filter section 343 has the same color as the output light of the third filter section 33. In this way, by setting the second sub-filter section 342 and the fourth sub-filter section 343, the red light band and the blue light band in the white light can be increased, and the red light and the blue light are guaranteed to be sufficient, thereby ensuring that the spectrum of the white light after the second sub-filter section 342 and the fourth sub-filter section 343 is approximately coincident with the normalized spectrum of the reference white point.

Optionally, the second sub-filtering part 342 included in the fourth filter part 34 can be arranged in the same layer and with the same material as the first filter part 31, and the fourth sub-filtering part 343 can be arranged in the same layer and with the same material as the third filter part 33. In this way, the manufacturing process of the second sub-filtering part 342 and the fourth sub-filtering part 343 can be simplified.

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.

For example, after comparing the white light spectrum emitted by the fourth sub-pixel with the normalized spectrum of the reference white point, it is known that the green band and the blue band in the white light emitted by the fourth sub-pixel are both lower than the red band, so that the green light and the blue light are insufficient, resulting in the white light emitted by the fourth sub-pixel being reddish as a whole. At this time, the fourth filter section 34 can be set to include a first sub-filter section 341 and a fourth sub-filter section 343, and the output light of the first sub-filter section 341 has the same color as the output light of the second filter section 32, and the output light of the fourth sub-filter section 343 has the same color as the output light of the third filter section 33. In this way, by setting the first sub-filter section 341 and the fourth sub-filter section 343, the green light band and the blue light band in the white light can be increased, ensuring that the green light and the blue light are sufficient, and then ensuring that the spectrum of the white light after the first sub-filter section 341 and the fourth sub-filter section 343 is approximately coincident with the normalized spectrum of the reference white point.

Optionally, the first sub-filtering part 341 included in the fourth filter part 34 can be arranged in the same layer and with the same material as the second filter part 32, and the fourth sub-filtering part 343 can be arranged in the same layer and with the same material as the third filter part 33. In this way, the manufacturing process of the first sub-filtering part 341 and the fourth sub-filtering part 343 can be simplified.

Among them, if the green light band is lower than the blue light band, the area and/or thickness of the first sub-filter portion 341 can be set to be smaller than the area and/or thickness of the fourth sub-filter portion 343. If the green light band is higher than the blue light band, the area and/or thickness of the first sub-filter portion 341 can be set to be larger than the area and/or thickness of the fourth sub-filter portion 343.

In the case where the fourth filter section 34 includes the third sub-filter section, the color of the output light of the third sub-filter section is the same as the mixed light of the output light of the first filter section 31 and the second filter section 32 .

Among them, the area and thickness of the third sub-filtering portion determine the filtering effect on the color light in the white light emitted by the fourth light-emitting portion 24. In order 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, taking the overall blueness of the white light emitted by the fourth sub-pixel as an example, a correspondence table of area ratio and thickness ratio can be pre-set, and then the thickness of the third sub-filtering portion is determined according to the area ratio of the third sub-filtering portion to the area of the light-emitting area of the fourth light-emitting portion 24, combined with the thickness of the first filter portion 31 and the thickness of the second filter portion 32, 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.

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 smaller than the thickness of the first filter portion 31, and smaller 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 a 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.

The reference values may refer to the above-mentioned embodiments. For example, when the ratio of the area of the third sub-filtering portion to the area of the light-emitting area of the fourth light-emitting portion 24 is greater than or equal to 40%, the thickness of the third sub-filtering 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-filtering portion to the area of the light-emitting area of the fourth light-emitting portion 24 is less than 40%, the thickness of the third sub-filtering 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.

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 24 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 thickness of the third sub-filter portion. 3/2 of the thickness of the first filter portion 31, and 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 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 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.

The values of the first reference value and the second reference value may refer to the above-mentioned embodiments. 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.

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 is basically consistent 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, it also includes a fourth sub-filter section 343, and the output light of the fourth sub-filter section 343 has the same color as the output light of the third filter section 33.

In this way, by setting the first sub-filter section 341, the second sub-filter section 342 and the fourth sub-filter section 343, it is possible to avoid affecting the white light effect emitted by the fourth sub-pixel, 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, and at the same time ensure 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.

The first sub-filter section 341, the second sub-filter section 342 and the fourth sub-filter section 343 may be arranged in the same layer as shown in FIG. 10, or may be arranged in a stacked layer as shown in FIG. 11, or may be arranged in a stacked layer as shown in FIG. 11. 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.

When the first sub-filter section 341, the second sub-filter section 342 and the fourth sub-filter section 343 are arranged in the same layer, the area of each sub-filter section determines the filtering effect of the sub-filter section on light. In view of the fact that the first sub-filter section 341, the second sub-filter section 342 and the fourth sub-filter section 343 are respectively the green sub-filter section, the red sub-filter section and the blue sub-filter section, in order to avoid the arrangement of the first sub-filter section 341, the second sub-filter section 342 and the fourth sub-filter section 343 affecting the white light effect emitted by the fourth sub-pixel, the area ratio of the first sub-filter section 341, the second sub-filter section 342 and the fourth sub-filter section 343 is arranged according to the color ratio of red, green and blue. For example, the area ratio of the first sub-filter section 341, the second sub-filter section 342, and the fourth sub-filter section 343 can be set to 7:2:1; or the area ratio of the first sub-filter section 341, the second sub-filter section 342, and the fourth sub-filter section 343 can be set to 6:3:1.

When the first sub-filter 341, the second sub-filter 342 and the fourth sub-filter 343 are stacked and distributed, the thickness of each sub-filter determines the filtering effect of the sub-filter on light. In view of the fact 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, in order to avoid the arrangement of the first sub-filter 341, the second sub-filter 342 and the fourth sub-filter 343 affecting the white light effect emitted by the fourth sub-pixel, the thickness ratio of the first sub-filter 341, the second sub-filter 342 and the fourth sub-filter 343 is arranged according to the color ratio of red, green and blue. For example, the thickness ratio of the first sub-filter portion 341, the second sub-filter portion 342, and the fourth sub-filter portion 343 can be set to 7:2:1; or the thickness ratio of the first sub-filter portion 341, the second sub-filter portion 342, and the fourth sub-filter portion 343 can be set to 6:3:1.

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. Next, the top emission is used as an example for explanation.

In combination with the above, 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. At this time, the reflectivity of the reflective anode 2151 included in the first light-emitting section 21, the reflectivity of the reflective anode 2151 included in the second light-emitting section 22, the reflectivity of the reflective anode 2151 included in the third light-emitting section 23, and the reflectivity of the reflective anode 2151 included in the fourth light-emitting section 24 can be the same, that is, the material of the reflective anode 2151 of each light-emitting section in the multiple light-emitting sections included in the light-emitting layer 2 is the same. For example, the reflective anode 2151 included in the first light-emitting section 21, the reflective anode 2151 included in the second light-emitting section 22, the reflective anode 2151 included in the third light-emitting section 23, and the reflective anode 2151 included in the fourth light-emitting section 24 are all composite layers of silver and indium tin oxide, and composite layers of nickel aluminum alloy and indium tin oxide.

Of course, the reflectivity of the reflective anode 2151 included in the first light-emitting portion 21, the reflectivity of the reflective anode 2151 included in the second light-emitting portion 22, and the reflectivity of the reflective anode 2151 included in the third light-emitting portion 23 may all be set to be greater than the reflectivity of the reflective anode 2151 included in the fourth light-emitting portion 24, that is, the reflectivity of the reflective anode 2151 corresponding to the first filter portion 31, the reflectivity of the reflective anode 2151 corresponding to the second filter portion 32, and the reflectivity of the reflective anode 2151 corresponding to the third filter portion 33 are all greater than the reflectivity of the reflective anode 2151 corresponding to the fourth filter portion 34.

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 can be 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.

Optionally, the reflectivity of the reflective anode 2151 included in the first light-emitting portion 21, the reflectivity of the reflective anode 2151 included in the second light-emitting portion 22, and the reflectivity of the reflective anode 2151 included in the third light-emitting portion 23 may be the same. By way of example, the reflective anode 2151 corresponding to the first filter portion 31, the reflective anode 2151 corresponding to the second filter portion 32, and the reflective anode 2151 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 2151 included in the fourth light-emitting portion 24 is less than the reflectivity of the reflective anode 2151 included in the first light-emitting portion 21. By way of example, the reflective anode 2151 corresponding to the fourth filter portion 34 is a composite layer of molybdenum and indium tin oxide.

The embodiment of the present disclosure further provides a display device, which includes the display panel described in the above embodiment.

In the present disclosure, in combination with the display panel described above, a fourth filter portion having an overlapping area with the fourth light-emitting portion is provided 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.

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 modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims (13)

1. A display panel, comprising: 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 comprises a first sub-filter section, and the color of the output light of the first sub-filter section is the same as the color of the output light of the second filter section. 3 . The display panel according to claim 2 , wherein the first sub-filter portion and the second sub-filter portion are arranged in the same layer and are made of the same material. 4. The display panel according to claim 2, wherein 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; When the ratio of the area of the first sub-filter portion to the light-emitting area 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 as described in claim 2 is characterized in that 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 in stacked layers. 6 . The display panel according to claim 1 , wherein the fourth filter section comprises 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-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; 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 as described in claim 5 is characterized in that the fourth filter part also includes a fourth sub-filter part, the output light of the fourth sub-filter part has the same color as the output light of the third filter part, and the first sub-filter part, the second sub-filter part and the fourth sub-filter part are distributed in the same layer or at least two sub-filter parts are distributed in stacked layers. 9 . The display panel according to claim 8 , wherein the first filter portion, the second filter portion, and the third filter portion emit red light, green light, and blue light, respectively. 10 . The display panel according to claim 9 , wherein an 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 a thickness ratio of the first sub-filter portion, the second sub-filter portion, and the fourth sub-filter portion is 7:2:1. 12. The display panel as described in claim 1 is characterized in that 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. 13. A display device, characterized by comprising the display panel according to any one of claims 1 to 12.