CN114429979A - Display device, display panel and manufacturing method thereof - Google Patents

Abstract

The present disclosure relates to the field of display technology, and mainly relates to a display device, a display panel and a manufacturing method thereof. The display panel of the present disclosure includes a substrate, a light-emitting functional layer and a color filter layer, wherein: the light-emitting functional layer is located on one side of the substrate, and It includes a plurality of light-emitting units distributed in an array. The light-emitting unit includes a bottom layer and a light-emitting layer. The light-emitting layer is located on the side of the bottom layer away from the substrate. The thicknesses of the bottom layers of two adjacent light-emitting units are different, and the light-emitting layer of each light-emitting unit emits a Color light, each light-emitting layer can emit light of multiple colors; the color filter layer is located on the side of the light-emitting functional layer away from the substrate, and the color filter layer includes a plurality of filter units distributed at intervals, in the direction perpendicular to the substrate , and each filter unit is distributed in a one-to-one correspondence with each light-emitting unit. The display panel of the present disclosure can increase the color gamut area and improve the display effect.

Description

Display device, display panel and manufacturing method thereof

technical field

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

Background technique

With the development of display technology, OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) display panels have been widely used because of their advantages of high response, high contrast, flexibility and the like. However, the color gamut area of the existing OLED device is small, and the display effect is poor.

It should be noted that the information disclosed in the above Background section is only for enhancement of understanding of the background of the present disclosure, and therefore may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art, and to provide a display device, a display panel and a manufacturing method thereof, which can increase the color gamut area and improve the display effect.

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

base;

The light-emitting functional layer is located on one side of the substrate and includes a plurality of light-emitting units distributed in an array, the light-emitting units include a bottom layer and a light-emitting layer, and the light-emitting layer is located on the side of the bottom layer away from the substrate, adjacent to The thicknesses of the bottom layers of the two light-emitting units are different, the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors;

The color filter layer is located on the side of the light-emitting functional layer away from the substrate, the color filter layer includes a plurality of filter units distributed at intervals, and in the direction perpendicular to the substrate, each filter unit is The units are distributed in a one-to-one correspondence with each of the light-emitting units.

In an exemplary embodiment of the present disclosure, the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit, and the thickness of the bottom layer of the first light-emitting unit is greater than the thickness of the bottom layer of the second light-emitting unit;

The material of the filter unit corresponding to the first light-emitting unit is the first filter material, the material of the filter unit corresponding to the second light-emitting unit is the second filter material, and the transmission of the first filter material The peak of the spectrum is to the right of the peak of the transmission spectrum of the second filter material.

In an exemplary embodiment of the present disclosure, the light-emitting functional layer further includes a plurality of first electrodes and a pixel definition layer, each of the first electrodes is spaced apart and located in a one-to-one correspondence on the bottom layer away from the one side of the light-emitting layer; the pixel definition layer and the first electrode are arranged on the same side of the substrate, and have a plurality of first openings exposing the first electrode;

The display panel also includes:

The black matrix layer is located on the side of the light-emitting functional layer away from the substrate, and has a plurality of second openings exposing the light-emitting units in a one-to-one correspondence, and the boundaries of the second openings corresponding to the first light-emitting units The distance between the boundary of the first opening and the corresponding first opening is greater than the distance between the boundary of the second opening corresponding to the second light-emitting unit and the boundary of the corresponding first opening, and the color filter layer is located away from the black matrix layer. one side of the light-emitting functional layer.

In an exemplary embodiment of the present disclosure, the color of light emitted by the first light-emitting unit and the second light-emitting unit is the same.

In an exemplary embodiment of the present disclosure, the colors of light emitted by the first light-emitting unit and the second light-emitting unit are both green.

In an exemplary embodiment of the present disclosure, the thickness of the filter unit corresponding to the first light-emitting unit is less than or equal to the thickness of the filter unit corresponding to the second light-emitting unit.

In an exemplary embodiment of the present disclosure, the material of the light-emitting layer of the first light-emitting unit is different from the material of the light-emitting layer of the second light-emitting unit.

In an exemplary embodiment of the present disclosure, the display panel further includes:

An encapsulation layer is located between the light-emitting functional layer and the black matrix layer.

According to one aspect of the present disclosure, there is provided a method for manufacturing a display panel, including:

provide a base;

A light-emitting functional layer is formed on one side of the substrate, the light-emitting functional layer includes a plurality of light-emitting units distributed in an array, the light-emitting units include a bottom layer and a light-emitting layer, and the light-emitting layer is located at the bottom of the bottom layer away from the substrate. On one side, the thicknesses of the bottom layers of two adjacent light-emitting units are different, the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors;

A color filter layer is formed on the side of the light-emitting functional layer away from the substrate. The color filter layer includes a plurality of filter units distributed at intervals. The units are distributed in a one-to-one correspondence with each of the light-emitting units.

According to an aspect of the present disclosure, there is provided a display device including the display panel described in any one of the above.

In the display device, the display panel and the manufacturing method thereof of the present disclosure, on the one hand, since each light-emitting unit emits light of multiple colors, full color can be realized by combining the light of multiple colors. On the other hand, due to the different thicknesses of the bottom layers of the two adjacent light-emitting units, the heights of the light-emitting centers of the two adjacent light-emitting units are different, resulting in spectra with different peak positions, resulting in the color gamut of the two adjacent light-emitting units. The difference becomes larger, and the color gamut area can be increased when two adjacent light-emitting units are combined to form a new color; at the same time, the ratio of the different areas of the two adjacent light-emitting units can prevent visual attenuation from being too fast, thereby improving color shift , to improve the display effect; in addition, the light emitted by the light-emitting unit can be filtered through the color filter layer, which can increase the color gamut while ensuring the light output, and further improve the display effect.

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.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic diagram of a display panel according to an embodiment of the disclosure;

2 is a top view of a display panel according to an embodiment of the disclosure;

3 is a top view of a display panel according to an embodiment of the disclosure;

4 is a top view of a display panel according to an embodiment of the disclosure;

FIG. 5 is a color gamut diagram of a display panel in an embodiment of the present disclosure;

FIG. 6 is a color gamut diagram of a display panel in an embodiment of the present disclosure;

7 is a color gamut diagram obtained after the materials of CF ₁ and CF ₂ are differentially designed in an embodiment of the present disclosure;

FIG. 8 is a visual attenuation curve obtained after the materials of CF ₁ and CF ₂ are differentiated in an embodiment of the present disclosure;

FIG. 9 is a flowchart of a method for manufacturing a display panel according to an embodiment of the disclosure.

Description of reference numbers:

1. Substrate; 11. Substrate; 12. Flattening layer; 2. Light-emitting functional layer; 21. Light-emitting unit; 211, First electrode; 212, Bottom layer; 213, Light-emitting layer; Definition layer; 23. Spacer layer; 3. Encapsulation layer; 4. Touch electrode layer; 5. Black matrix layer; 6. Color filter layer; 7. Protective layer.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various 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 concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the drawings are merely 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 an icon to another component, these terms are used in this specification only for convenience, such as according to the direction of the example described. It will be appreciated that if the device of the icon is turned upside down, the components described as "on" will become the components on "bottom". When a certain structure is "on" other structures, it may mean that a certain structure is integrally formed on other structures, or that a certain structure is "directly" arranged on other structures, or that a certain structure is "indirectly" arranged on another structure through another structure. other structures.

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 "include" and "have" are used to indicate an open-ended is meant to be inclusive and means that additional elements/components/etc may be present in addition to the listed elements/components/etc; the terms "first" and "second" etc. are used only as labels, not Limit the number of its objects.

Embodiments of the present disclosure provide a display panel, and the display panel may be an OLED display panel, of course, may also be other display panels, which are not particularly limited herein. FIG. 1 shows a schematic diagram of a display panel in an embodiment of the present disclosure. With reference to FIG. 1 , the display panel may include a substrate 1, a light-emitting functional layer 2 and a color filter layer 6, wherein:

The light-emitting functional layer 2 may be located on one side of the substrate 1, and may include a plurality of light-emitting units 21 distributed in an array. The light-emitting units 21 may include a bottom layer 212 and a light-emitting layer 213. The light-emitting layer 213 is located on the side of the bottom layer 212 away from the substrate 1. The thicknesses of the bottom layers 212 of the two adjacent light-emitting units 21 are different, the light-emitting layer 213 of each light-emitting unit 21 emits light of one color, and each light-emitting layer 213 can emit light of multiple colors;

The color filter layer 6 may be located on the side of the light-emitting functional layer 2 away from the substrate 1, and the color filter layer 6 may include a plurality of filter units distributed at intervals. The units 21 may be distributed in a one-to-one correspondence.

In the display panel of the embodiment of the present disclosure, on the one hand, since each light-emitting unit 21 emits light of multiple colors, full color can be realized by combining the light of multiple colors. On the other hand, due to the different thicknesses of the bottom layers 212 of the two adjacent light-emitting units 21, the heights of the light-emitting centers of the two adjacent light-emitting units 21 are different, thereby generating spectra with different peak positions, resulting in the occurrence of two adjacent light-emitting units. The difference in the color coordinates of 21 becomes larger, so that the color gamut area can be increased when two adjacent light-emitting units 21 are combined to form a new color; at the same time, the ratio of the different areas of the two adjacent light-emitting units can prevent visual attenuation from being too fast. , and then improve the color shift and improve the display effect. In addition, the light emitted by the light emitting unit 21 can be filtered by the color filter layer 6, which can increase the color gamut while ensuring the light output, and further improve the display effect.

FIG. 1 shows a schematic structural diagram of a display panel according to an embodiment of the present disclosure. The light-emitting principle of the display panel in the embodiment of the present disclosure will be described below with reference to FIG. 1 :

The display panel mainly includes a substrate 1 , a light-emitting functional layer 2 and a color filter layer 6 . The substrate 1 includes a substrate 11 and a pixel driving layer on one side of the substrate 11 . The pixel driving layer includes a plurality of pixel driving circuits arranged side by side. The light-emitting functional layer 2 is disposed on the side of the pixel driving layer away from the substrate 11, and includes a plurality of light-emitting units 21 distributed in an array. Each light-emitting unit 21 is powered on, and each light-emitting unit 21 is controlled to emit light independently in a time-series manner, thereby displaying an image. For example, multiple light-emitting units 21 can be powered on at the same time, and the multiple light-emitting units 21 can be controlled to emit light at the same time, so that light of multiple colors can be combined to display different colors, thereby realizing color display.

In an exemplary embodiment of the present disclosure, the substrate 11 may be a flat plate structure, which may be a rigid material such as glass, or a flexible material such as PI (polyimide). The substrate 11 may be a single-layer or multi-layer structure, which is not limited herein.

The pixel driving circuit may include transistors, and the transistors may be electrically connected to the light-emitting units 21 , so as to control the light-emitting units 21 in a one-to-one correspondence with each transistor, thereby displaying an image.

The transistor may include an active layer, a gate insulating layer, a gate electrode and a source-drain layer, the gate insulating layer may include a first gate insulating layer and a second gate insulating layer, and the active region may be doped multiple times to form the active layer , the active layer can be located on the side of the substrate 11 close to the light-emitting functional layer 2; the first gate insulating layer covers the active layer; the gate is arranged on the side of the first gate insulating layer away from the substrate 11; the second gate insulating layer The layer covers the gate electrode and the first gate insulating layer, and the first gate insulating layer and the second gate insulating layer can be opened to form a via hole connecting the active region. The orthographic projection of the via hole on the substrate 11 is the same as The orthographic projections of the gate on the substrate 11 do not overlap each other; the source and drain layers are formed on the side of the second gate insulating layer away from the substrate 11, and include a source electrode and a drain electrode, and the source electrode and the drain electrode can pass through the second gate insulating layer. The via holes of the second gate insulating layer and the first gate insulating layer are connected to both ends of the active layer.

As shown in FIG. 1 , the substrate 1 may further include a planarization layer 12 , and the planarization layer 12 may cover the pixel driving layer to eliminate the device discontinuity of the pixel driving layer. For example, the planarization layer 12 can be formed on the surface of the pixel driving layer away from the substrate 11 by physical vapor deposition, chemical vapor deposition, or atomic layer deposition. Of course, the planarization layer 12 can also be formed by other methods. The formation method of the planarization layer 12 is not particularly limited.

The light-emitting functional layer 2 may be located on the side of the substrate 1 , for example, the light-emitting functional layer 2 may be located on the side of the planarization layer 12 away from the pixel driving layer. In an exemplary embodiment of the present disclosure, the light-emitting functional layer 2 may include a pixel definition layer 22 and a plurality of light-emitting units 21 defined by the pixel definition layer 22 , the light-emitting units 21 may be distributed in an array, and each light-emitting unit 21 may emit light The unit 21 can be used as a sub-pixel.

In an embodiment of the present disclosure, the light emitting unit 21 may include a first electrode 211, a bottom layer 212, a light emitting layer 213 and a second electrode 214, wherein:

The number of the first electrodes 211 is multiple, and the multiple first electrodes 211 can be arranged at intervals and distributed on the surface of the planarization layer 12 in an array. The first electrode 211 can be used as an anode layer of the light-emitting unit 21, and the material thereof can be a transparent conductive material or a light-shielding material, which is not particularly limited herein. For example, it can be ITO or AZO.

The pixel definition layer 22 and the first electrodes 211 are located on the same side of the substrate 1 , and have a plurality of first openings exposing the first electrodes 211 in a one-to-one correspondence. For example, the pixel definition layer 22 and the first electrode 211 are both located on the surface of the planarization layer 12 facing away from the substrate 11 . It should be noted that, in the device fabrication process, the spacer layer 23 may be formed on the side of the pixel definition layer 22 away from the substrate 11 to avoid damage to the surface of the pixel definition layer 22 in the process of manufacturing subsequent thin films. The material of the spacer layer 23 may be the same as the material of the pixel definition layer 22 , or may be different from the material of the pixel definition layer 22 , which is not particularly limited herein.

The bottom layer 212 may be located on the side of the first electrode 211 away from the substrate 1 and may extend at least into each of the first openings of the pixel definition layer 22 and be in contact with the first electrode 211 corresponding to each of the first openings. For example, the bottom layer 212 may include a layer of thin films or multiple layers of thin films, which are not particularly limited here, for example, it may be a hole transport layer or an electron blocking layer, or may be a hole transport layer and an electron blocking layer A multi-layer film layer composed of layers together, and the structure of the bottom layer 212 is not particularly limited here.

The light emitting layer 213 can be located on the side of the bottom layer 212 away from the substrate 1 (ie, the first electrodes 211 can be located on the side of the bottom layer 212 away from the light emitting layer 213 in a one-to-one correspondence), and can extend at least to the first electrodes of the pixel definition layer 22 . in an opening and in contact with the bottom layer 212 in each of the first openings.

The second electrode 214 may be located on the side of the light emitting layer 213 away from the substrate 1 , the second electrode 214 may extend into the first opening and cover at least the overlapping portion of the light emitting layer 213 , the bottom layer 212 and the first electrode 211 . The second electrode 214 may be a metal oxide electrode, a metal electrode, a metal alloy electrode, or a composite electrode formed by a combination of metal and metal oxide, which is not particularly limited herein. The second electrode 214 may serve as a cathode layer of the light emitting unit 21 . The regions of the first electrode 211 , the bottom layer 212 , the light-emitting layer 213 and the second electrode 214 corresponding to the first opening of the pixel definition layer 22 constitute a light-emitting unit 21 , that is, the OLED light-emitting unit 21 . A voltage may be applied to the first electrode 211 and the second electrode 214, thereby causing the light emitting unit 21 to emit light.

In an exemplary embodiment of the present disclosure, the light emitting layer 213 of each light emitting unit 21 can emit light of one color, and each light emitting layer 213 can emit light of multiple different colors. The light emitted by each light-emitting unit 21 can be combined together, and each light-emitting unit 21 can be controlled to emit light independently in a time-series manner, thereby realizing the regulation of light-emitting color. For example, the light emitting device layer may include a red light emitting unit 21, a green light emitting unit 21 and a blue light emitting unit 21, and the red light emitting unit 21(R), the green light emitting unit 21(G) and the blue light emitting unit 21 (B) are combined together to realize the regulation of emission color.

In an exemplary embodiment of the present disclosure, the thicknesses of the bottom layers 212 of two adjacent light-emitting units 21 are different, so that the heights of the light-emitting centers of the two adjacent light-emitting units 21 are different, thereby generating spectra with different peak positions , causing the color coordinate difference of two adjacent light-emitting units 21 to become larger, and then forming color gamuts of different areas when two adjacent light-emitting units 21 are combined with other light-emitting units 21 to form a new color, and two adjacent light-emitting units 21 emit light. The ratio of the different areas of the units 21 makes the visual attenuation of the two adjacent light-emitting units 21 different, which can prevent the visual attenuation from being too fast, thereby improving the color shift and improving the display effect.

In an exemplary embodiment of the present disclosure, the light-emitting functional layer 2 may include a first light-emitting unit and a second light-emitting unit, and the thickness of the bottom layer 212 of the first light-emitting unit may be greater than the thickness of the bottom layer 212 of the second light-emitting unit, such that The heights of the light-emitting centers of the first light-emitting unit and the second light-emitting unit are different, so that spectra with different peak positions are generated, and the difference between the color coordinates of the first light-emitting unit and the second light-emitting unit is larger, so that the difference between the first light-emitting unit and the second light-emitting unit is larger. The color gamut areas of the new colors formed by the combination of the light-emitting unit and the second light-emitting unit are different, and at the same time, the ratio of the different areas of the two adjacent light-emitting units 21 can avoid the visual attenuation being too fast, thereby improving the color shift and improving the display effect. .

In the preparation process, vacuum evaporation, magnetron sputtering, physical vapor deposition, chemical vapor deposition or atomic layer deposition, etc. can be used to form the bottom layer 212. In one embodiment, the bottom layer 212 can be formed by vacuum evaporation, For example, the bottom layer 212 corresponding to the first light-emitting unit and the bottom layer 212 corresponding to the second light-emitting unit can be respectively evaporated through two different evaporation chambers, so as to obtain two bottom layers 212 with different thicknesses; The bottom layers 212 with different thicknesses are prepared in the cavity. For example, during the process of evaporating the bottom layers 212 , two metal masks with openings at different positions can be used in the same vapor deposition chamber to obtain two bottom layers 212 with different thicknesses.

In an exemplary embodiment of the present disclosure, the color of light emitted by the first light-emitting unit and the second light-emitting unit may be the same, and further, the bottom layer 212 of the light-emitting unit 21 of the same color may be designed differently, which may increase the The color coordinates corresponding to the color. Of course, the first light-emitting unit and the second light-emitting unit may also be light-emitting units 21 with different light-emitting colors, and the light-emitting colors of the first light-emitting unit and the second light-emitting unit are not particularly limited herein.

In one embodiment, as shown in FIGS. 2 and 3 , the light emitting functional layer 2 may include a plurality of red light emitting units (R), a plurality of green light emitting units (G) and a plurality of blue light emitting units (B). A red light-emitting unit (R), a green light-emitting unit (G), and a blue light-emitting unit (B) can be combined together to form a color control group, and the color control group is used for color control, and adjacent color control Groups may share one or two colors of light emitting cells 21 .

The light functional layer 2 may include one red light emitting unit (R), two green light emitting units (G) and one blue light emitting unit (B), and the light emitted by the first light emitting unit and the second light emitting unit may be green ( G). In FIG. 4, the green light emitting unit (G) at the lower left can be used as the first light emitting unit (G ₁ ), and the green light emitting unit (G) at the upper right can be regarded as the second light emitting unit (G ₂ ), RG ₁ B constitutes the first color regulation group, RG ₂ B constitutes the second color regulation group, the first color regulation group and the second color regulation group share the red light emitting unit (R) and the blue light emitting unit (B). ).

The thickness of the bottom layer 212 of the first light-emitting unit (G ₁ ) is greater than the thickness of the bottom layer 212 of the second light-emitting unit (G ₂ ), so the height of the light-emitting layer 213 of the first light-emitting unit (G ₁ ) is higher than that of the second light-emitting unit (G _{2 )} . ) of the light-emitting layer 213, so that the color coordinate of the first light-emitting unit (G ₁ ) is greater than the color coordinate of the second light-emitting unit (G ₂ ). At this time, as shown in FIG. 5 , the area of the color gamut 1 composed of the first light emitting unit (G ₁ ), the red light emitting unit (R) and the blue light emitting unit (B) _; The area of the color gamut 2 composed of the light emitting unit (R) and the blue light emitting unit (B); at this time, the color gamut area of the light emitting functional layer 2 is the color coordinate of red light, the color coordinate of blue light, and the green light in color gamut 1. The area covered by the quadrilateral formed by the color coordinates of the green light in the color gamut 2 and the color coordinates of the green light in the color gamut 2, the area that can be achieved by the light emission of the entire device includes the area of the color gamut 1 and the color gamut 2, which in turn makes the color gamut volume of the entire device. It reached 94.2% under the BT.2020 standard; compared to the unimproved device, its color gamut increased by 7.3%.

It should be noted that the area of the first light-emitting unit (G ₁ ) and the second light-emitting unit (G ₂ ) can be controlled so that the area of the first light-emitting unit (G ₁ ) is larger than the area of the second light-emitting unit (G ₂ ). By increasing the luminous brightness, the visual attenuation of the device is improved, thereby improving the influence of the thickness variation of the bottom layer 212 on the color shift of the white light. In the above embodiment, the overlapping area of gamut 1 and gamut 2 accounts for 96.7% of gamut 1 and 92.3% of gamut 2. When it is necessary to display the area occupied by gamut 1 and gamut 2, the green light pixel cannot be shared.

It should be noted that the light emitted by the first light-emitting unit and the second light-emitting unit may also be both red (R) or blue (B). When the light emitted by the first light-emitting unit and the second light-emitting unit are both red or blue Figure 6 shows the color gamut diagram after the thickness of the bottom layer is differentiated.

In an exemplary embodiment of the present disclosure, the guest materials of the light-emitting layers 213 of two adjacent light-emitting units 21 are different, so that the difference in color coordinates of the two adjacent light-emitting units 21 increases, thereby increasing the color gamut of the device area. For example, the guest material of the light-emitting layer 213 of the first light-emitting unit is different from the guest material of the light-emitting layer 213 of the second light-emitting unit, and the host material of the light-emitting layer 213 of the first light-emitting unit and the light-emitting layer 213 of the second light-emitting unit are different. The host material is the same, so that the color coordinate difference between the first light-emitting unit and the second light-emitting unit becomes larger, thereby increasing the color gamut area of the light-emitting functional layer 2 composed of the first light-emitting unit, the second light-emitting unit and other light-emitting units 21, improving the Device resolution.

In an exemplary embodiment of the present disclosure, the doping concentrations of the guest materials of the light-emitting layers 213 of two adjacent light-emitting units 21 are different, so that the color coordinate difference between the two adjacent light-emitting units 21 increases, and further increases The color gamut area of the device reduces visual attenuation. For example, the guest material of the light-emitting layer 213 of the first light-emitting unit is the same as the guest material of the light-emitting layer 213 of the second light-emitting unit, and the host material of the light-emitting layer 213 of the first light-emitting unit and the light-emitting layer 213 of the second light-emitting unit The host material is also the same. The doping concentration of the guest material in the light-emitting layer 213 of the first light-emitting unit is greater than the doping concentration of the guest material in the light-emitting layer 213 of the second light-emitting unit, so that the color coordinate of the first light-emitting unit is greater than that of the second light-emitting unit. It further increases the color gamut area of the light-emitting functional layer 2 formed by the first light-emitting unit, the second light-emitting unit and other light-emitting units 21, and improves the resolution of the device. For example, the doping concentration of the guest material in the light-emitting layer 213 of the second light-emitting unit is greater than 2%, the doping concentration of the guest material in the light-emitting layer 213 of the first light-emitting unit is less than 10%, and the light-emitting layer of the first light-emitting unit has a doping concentration of less than 10%. The doping concentration of the guest material of 213 is greater than the doping concentration of the guest material of the light-emitting layer 213 of the second light-emitting unit.

It should be noted that the material of the light-emitting layer 213 of the first light-emitting unit can also be the same as the material of the light-emitting layer 213 of the second light-emitting unit, and the material of the light-emitting layer 213 of the first light-emitting unit and the light-emitting layer of the second light-emitting unit are not discussed here. The material of the layer 213 is specially limited.

In an exemplary embodiment of the present disclosure, the thicknesses of the second electrodes 214 of two adjacent light-emitting units 21 are different, so that the light transmittances of the two adjacent light-emitting units 21 are different, which can further increase the color gamut area of the device . For example, the thickness of the second electrode 214 of the first light-emitting unit is smaller than the thickness of the second electrode 214 of the second light-emitting unit, so that the transmittance of the first light-emitting unit is greater than that of the second light-emitting unit, and the first light-emitting unit The color coordinate of the unit is greater than the color coordinate of the second light-emitting unit. The color gamut area of the device composed of the first light-emitting unit, the second light-emitting unit and other light-emitting units 21 is larger than the color gamut area of the device composed of a plurality of light-emitting units 21 with the same second electrodes 214 .

For example, the thickness of the second electrode 214 of the first light-emitting unit is greater than 10 nm, the thickness of the second electrode 214 of the second light-emitting unit is less than 15 nm, and the thickness of the second electrode 214 of the first light-emitting unit is smaller than that of the second light-emitting unit The thickness of the second electrode 214 .

The color filter layer 6 is located on the side of the light-emitting functional layer 2 away from the substrate 1. The color filter layer 6 includes a plurality of filter units. side. In an exemplary embodiment of the present disclosure, the number of filter units may be the same as the number of light-emitting units 21 , and in the direction perpendicular to the substrate 1 , each filter unit may be distributed in a one-to-one correspondence with each light-emitting unit 21 .

It should be noted that the shape of the filter unit can be the same as the shape of the light emitting unit 21, and its size can be larger than the size of the light emitting unit 21, so as to ensure that the light emitted by the light emitting unit 21 can be filtered by the corresponding filter unit. shoot. The filter color of the filter unit may be the same as the light output color of the light emitting unit 21 . For example, when the light emitted by the light emitting unit 21 is green, the corresponding filter unit can be a green filter unit; when the light emitted by the light emitting unit 21 is red, the corresponding filter unit can be red Filter unit; when the light emitted by the light-emitting unit 21 is blue, the filter unit corresponding to it can be a blue filter unit.

In an exemplary embodiment of the present disclosure, the material of the filter unit (CF ₁ ) corresponding to the first light-emitting unit may be denoted as the first filter material, and the filter unit (CF ₂ ) corresponding to the second light-emitting unit may be denoted as the first filter material. ) material is denoted as the second filter material, and the peak value of the transmission spectrum of the first filter material is on the right side of the peak value of the transmission spectrum of the second filter material, so as to increase the light emitted by CF ₁ and CF ₂ The difference in color coordinates further increases the color gamut area, and through the ratio of different areas of adjacent light-emitting units, slows down visual attenuation, improves color cast, and improves display effect.

In an exemplary embodiment of the present disclosure, the thickness of the filter unit (CF ₁ ) corresponding to the first light-emitting unit (G ₁ ) is not greater than the thickness of the filter unit (CF ₂ ) corresponding to the second light-emitting unit (G ₂ ) The thickness of the filter unit (CF ₁ ) corresponding to the first light-emitting unit (G ₁ ) is greater than 2um; the thickness of the filter unit (CF ₂ ) corresponding to the second light-emitting unit (G ₂ ) is less than 4um. For example, the thickness of the filter unit (CF ₁ ) corresponding to the first light-emitting unit (G ₁ ) is 2um, and the thickness of the filter unit (CF ₂ ) corresponding to the second light-emitting unit (G ₂ ) is 4um; The thickness of the filter unit (CF ₁ ) corresponding to the light-emitting unit (G ₁ ) is 2.5um, and the thickness of the filter unit (CF ₂ ) corresponding to the second light-emitting unit (G ₂ ) is 3.5um.

When the first light-emitting unit and the second light-emitting unit are respectively lit, the color gamut diagram obtained by differentiating the materials _of CF1 and _CF2 is shown in Figure 7. In Figure 7, the color coordinate of CF1 is greater than that of CF2. The color coordinates of the emission spectrum of the first light-emitting unit (G ₁ ) are greater than the color coordinates of the emission spectrum of the second light-emitting unit (G ₂ ); the color gamut that can be displayed by the overall device after the two are combined The plan is larger than the area. Based on the differentiated design of the first light-emitting unit (G ₁ ) and the second light-emitting unit (G ₂ ), the visual attenuation curve obtained by the differentiated design of the materials of CF ₁ and CF ₂ is shown in Figure 8 , in Figure 8, the visual attenuation of the device including CF1 material is slower, the visual attenuation of the device including CF2 material is faster, and the visual attenuation of the device obtained after the fusion of the two is overall slower.

In an exemplary embodiment of the present disclosure, the thickness of the filter unit (CF ₁ ) corresponding to the first light-emitting unit is less than or equal to the thickness of the filter unit (CF ₂ ) corresponding to the second light-emitting unit, so that CF ₁ pairs The transmittance of the light emitted by the first light-emitting unit is greater than or equal to the transmittance of CF ₂ to the light emitted by the second light-emitting unit.

In an exemplary embodiment of the present disclosure, the display panel of the present disclosure may further include a black matrix layer 5, and the black matrix layer 5 can block the light at the gap between two adjacent light-emitting units 21 to avoid cross-coloring . The black matrix layer 5 may be located on the side of the light-emitting functional layer 2 away from the substrate 1, and has a plurality of second openings exposing the light-emitting units 21. The number of the second openings may be the same as the number of the light-emitting units 21, and each second opening may be Each light-emitting unit 21 is exposed in a one-to-one correspondence; at the same time, since the number of the filter units is the same as the number of the light-emitting units 21, the number of the second openings is also the same as the number of the filter units.

The color filter layer 6 can be located on the side of the black matrix layer 5 away from the light-emitting functional layer 2 , and the filter units can be distributed correspondingly to the second openings, and can fill the second openings in a one-to-one correspondence. In order to prevent light leakage from the contact surface between the filter unit and the black matrix layer 5 , each filter unit can extend from the inside of the second opening to the outside thereof, and at least partially overlap with the black matrix layer 5 .

In an exemplary embodiment of the present disclosure, the distance ( D1 ) between the boundary of the second opening corresponding to the first light-emitting unit and the boundary of the corresponding first opening is greater than the boundary and the boundary of the second opening corresponding to the second light-emitting unit. The distance ( D2 ) between the boundaries of the corresponding first openings ensures that the first light-emitting unit emits more light than the second light-emitting unit.

In an exemplary embodiment of the present disclosure, the display panel of the present disclosure may further include an encapsulation layer 3, the encapsulation layer 3 may be located between the light-emitting functional layer 2 and the black matrix layer 5, and the encapsulation layer 3 may include a first inorganic layer and the second inorganic layer, the second inorganic layer can be located on the side of the first inorganic layer away from the substrate 1, and the water and oxygen in the air can be blocked by the first inorganic layer and the second inorganic layer. The layer and the second inorganic layer can form a double barrier to external water and oxygen to improve the encapsulation effect. The encapsulation layer 3 may further include an organic layer, and the organic layer may be located between the first inorganic layer and the second inorganic layer. The film layers are peeled off due to the tension caused by the stress, which can prolong the service life of the display panel. A protective layer 7 can be provided on the surface of the color filter layer 6 away from the substrate 1, and the protective layer 7 can cover the part of the color filter layer 6 and the black matrix layer 5 exposed outside the filter unit, so as to protect the color filter layer 6 and the black matrix layer 5. The black matrix layer 5 is protected.

In an exemplary embodiment of the present disclosure, the display panel of the present disclosure may further include a touch electrode layer 4 , the touch electrode layer 4 may be in a grid shape, and the touch electrode layer 4 may be located between the encapsulation layer 3 and the black Between the matrix layers 5, the touch control can be performed through the touch electrode layer 4, so as to realize the touch function of the display panel.

The present disclosure also provides a method for manufacturing a display panel. The display panel may be a micro OLED display panel, and of course, may also be other display panels, which are not limited herein. FIG. 9 shows a flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure. With reference to FIG. 9 , the method for manufacturing a display panel of the present disclosure may include steps S110 to S130, wherein:

Step S110, providing a substrate 1;

In step S120, a light-emitting functional layer 2 is formed on one side of the substrate 1. The light-emitting functional layer 2 includes a plurality of light-emitting units 21 distributed in an array. The light-emitting units 21 include a bottom layer 212 and a light-emitting layer 213. The layer 213 is located on the side of the bottom layer 212 away from the substrate 1, the thickness of the bottom layer 212 of two adjacent light-emitting units 21 is different, and the light-emitting layer 213 of each light-emitting unit 21 emits light of one color, Each of the light-emitting layers 213 can emit light of various colors;

Step S130 , a color filter layer 6 is formed on the side of the light-emitting functional layer 2 away from the substrate 1 , and the color filter layer 6 includes a plurality of filter units distributed at intervals. In the direction, each of the filter units is distributed in a one-to-one correspondence with each of the light-emitting units 21 .

The beneficial effects of the manufacturing method of the display panel according to the embodiment of the present disclosure have been described in detail in the embodiment of the display panel above, and will not be repeated here.

It should be noted that although the steps of the manufacturing method of the display panel in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in the specific order, or that all the steps must be performed. steps shown to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and/or one step may be decomposed into multiple steps for execution, and the like.

Embodiments of the present disclosure further provide a display device, the display device may include the display panel of any of the above-mentioned embodiments, the structure and beneficial effects of which can refer to the above-mentioned embodiments of the display panel, which will not be described in detail here. The display device in the embodiment of the present disclosure may be a device for displaying images, such as a mobile phone, a display screen, a tablet computer, a TV, and a micro-display device, which will not be listed here.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of 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 techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

Claims (10)

1. A display panel, characterized in that, comprising: base; The light-emitting functional layer is located on one side of the substrate and includes a plurality of light-emitting units distributed in an array, the light-emitting units include a bottom layer and a light-emitting layer, and the light-emitting layer is located on the side of the bottom layer away from the substrate, adjacent to The thicknesses of the bottom layers of the two light-emitting units are different, the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors; The color filter layer is located on the side of the light-emitting functional layer away from the substrate, the color filter layer includes a plurality of filter units distributed at intervals, and in the direction perpendicular to the substrate, each filter unit is The units are distributed in a one-to-one correspondence with each of the light-emitting units. 2 . The display panel according to claim 1 , wherein the light-emitting functional layer comprises a first light-emitting unit and a second light-emitting unit, and the thickness of the bottom layer of the first light-emitting unit is greater than that of the second light-emitting unit. 3 . the thickness of the bottom layer; The material of the filter unit corresponding to the first light-emitting unit is the first filter material, the material of the filter unit corresponding to the second light-emitting unit is the second filter material, and the transmission of the first filter material The peak of the spectrum is to the right of the peak of the transmission spectrum of the second filter material. 3 . The display panel according to claim 2 , wherein the light-emitting functional layer further comprises a plurality of first electrodes and a pixel definition layer, and the first electrodes are distributed at intervals and located in the one-to-one correspondence. 4 . a side of the bottom layer away from the light-emitting layer; the pixel definition layer and the first electrode are arranged on the same side of the substrate, and have a plurality of first openings exposing the first electrode; The display panel also includes: The black matrix layer is located on the side of the light-emitting functional layer away from the substrate, and has a plurality of second openings exposing the light-emitting units in a one-to-one correspondence, and the boundaries of the second openings corresponding to the first light-emitting units The distance between the boundary of the first opening and the corresponding first opening is greater than the distance between the boundary of the second opening corresponding to the second light-emitting unit and the boundary of the corresponding first opening, and the color filter layer is located away from the black matrix layer. one side of the light-emitting functional layer. 4 . The display panel according to claim 2 , wherein the color of light emitted by the first light-emitting unit and the second light-emitting unit is the same. 5 . 5 . The display panel according to claim 4 , wherein the color of light emitted by the first light-emitting unit and the second light-emitting unit is green. 6 . 6 . The display panel according to claim 2 , wherein the thickness of the filter unit corresponding to the first light emitting unit is less than or equal to the thickness of the filter unit corresponding to the second light emitting unit. 7 . 7 . The display panel according to claim 2 , wherein the material of the light-emitting layer of the first light-emitting unit is different from the material of the light-emitting layer of the second light-emitting unit. 8 . 8. The display panel according to claim 3, wherein the display panel further comprises: An encapsulation layer is located between the light-emitting functional layer and the black matrix layer. 9. A method for manufacturing a display panel, comprising: provide a base; A light-emitting functional layer is formed on one side of the substrate, the light-emitting functional layer includes a plurality of light-emitting units distributed in an array, the light-emitting units include a bottom layer and a light-emitting layer, and the light-emitting layer is located at the bottom of the bottom layer away from the substrate. On one side, the thicknesses of the bottom layers of two adjacent light-emitting units are different, the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors; A color filter layer is formed on the side of the light-emitting functional layer away from the substrate. The color filter layer includes a plurality of filter units distributed at intervals. The units are distributed in a one-to-one correspondence with each of the light-emitting units. 10. A display device, comprising the display panel according to any one of claims 1-8.

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