CN116782717A - Display panel and display device - Google Patents

Abstract

The present disclosure provides a display panel and a display device, the display panel including: the display device comprises a substrate, a driving functional layer, a pixel defining layer, a display layer, a packaging layer and a color film layer, wherein the driving functional layer is positioned on one side of the substrate, the pixel defining layer is positioned on one side of the driving functional layer, which is away from the substrate, the pixel defining layer is formed by black materials, and a plurality of pixel holes are formed in the pixel defining layer; the display layer comprises a plurality of sub-pixels, and the sub-pixels are located in the pixel holes in a one-to-one correspondence manner; the packaging layer is positioned on one side of the display layer, which is away from the substrate; the color film layer is positioned on one side of the packaging layer, which is away from the display layer, and comprises a black matrix and a plurality of color film units, wherein the color film units are arranged in one-to-one correspondence with the sub-pixels. The display panel provided by the disclosure improves the display effect.

Description

Display panel and display device

Technical Field

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

Background

The organic electroluminescent display panel (Organic Electro luminescent Display, OLED) gradually becomes the main stream in the display field by virtue of the excellent performances of low power consumption, high color saturation, wide viewing angle, thin thickness, flexibility and the like, and can be widely applied to terminal products such as smart phones, tablet computers, televisions and the like. Among OLED devices, flexible devices are showing an increasing importance, and at the same time, in order to realize a better flexible screen, polarizers (POL) which are more likely to break at small radius bends become a key bottleneck, so recently COE (Color Filter On Encap) is beginning to become an important trend.

Among the COE techniques, the COE technique is commonly used in which RGB of a CF is used for shielding in RGB regions of a back plate, so as to improve the problem of poor display effect in outdoor or strong light conditions caused by reflection of an Anode. However, in the cog structure, the transmittance is high, and there is a problem that the reflectance is high at a place where the light is bright.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of an embodiment of the present disclosure is to provide a display panel and a display device, which improve display effect.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

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

a substrate;

a driving functional layer located at one side of the substrate;

a pixel defining layer on a side of the driving function layer facing away from the substrate, the pixel defining layer being formed of a black material, the pixel defining layer having a plurality of pixel holes formed thereon;

The display layer comprises a plurality of sub-pixels, and the sub-pixels are located in the pixel holes in a one-to-one correspondence manner;

the packaging layer is positioned on one side of the display layer away from the substrate;

the color film layer is positioned on one side, away from the display layer, of the packaging layer, and comprises a black matrix and a plurality of color film units, wherein the color film units are arranged in one-to-one correspondence with the sub-pixels.

In one exemplary embodiment of the present disclosure, in a thickness direction of the display panel, the pixel defining layer includes a plurality of first thickness regions and a plurality of second thickness regions, a thickness of the first thickness regions being greater than a thickness of the second thickness regions; the plurality of first thickness regions and the plurality of second thickness regions extend along a first direction, the plurality of first thickness regions and the plurality of second thickness regions are alternately distributed along a second square, and the first direction intersects the second direction; a plurality of through holes are formed on the pixel defining layer, and the through holes are positioned on the first thickness area;

the display panel further includes: and the light-transmitting layer is filled with a plurality of through holes.

In an exemplary embodiment of the present disclosure, the thickness of the first thickness region decreases in a direction from the center of the first thickness region toward the second thickness region; and the areas, close to the center of the first thickness region, of the two at least partially adjacent through holes are larger in the plurality of through holes located in the first thickness region.

In an exemplary embodiment of the present disclosure, the display panel further includes: the spacer is positioned between the substrate and the color film layer; the material of the isolation pad is the same as that of the light-transmitting layer.

In one exemplary embodiment of the present disclosure, the material density of the pixel defining layer is greater than the material density of the light transmitting layer; in the direction of the light-transmitting layer facing the color film layer, at least part of the surface of the light-transmitting layer in the through hole is lower than the surface of the pixel defining layer.

In one exemplary embodiment of the present disclosure, in a thickness direction of the display panel, the pixel defining layer includes a plurality of first thickness regions and a plurality of second thickness regions, the thickness of the first thickness regions being greater than the thickness of the second thickness regions, the plurality of first thickness regions and the plurality of second thickness regions extending in a first direction, the plurality of first thickness regions and the plurality of second thickness regions being alternately distributed in a second direction, the first direction intersecting the second direction; the thickness of the first thickness region decreases from the center of the first thickness region toward the second thickness region;

The black matrix is provided with a plurality of color film holes, the color film holes and the pixel holes are arranged in one-to-one correspondence, the color film units are positioned in the color film holes in one-to-one correspondence, and the area of the color film holes in the first thickness area is larger than that of the color film holes in the second thickness area.

In an exemplary embodiment of the present disclosure, among the plurality of color film holes located in the first thickness region, an area of at least a portion of two adjacent color film holes near a center of the first thickness region is larger.

In an exemplary embodiment of the disclosure, in the plurality of color film holes located in the first thickness region, an area, close to a center of the first thickness region, of two color film holes corresponding to the sub-pixels with at least two adjacent same colors is larger.

In one exemplary embodiment of the present disclosure, the display panel includes a middle region and an edge region surrounding the middle region; the black matrix is provided with a plurality of color film holes, the color film holes are arranged in one-to-one correspondence with the pixel holes, and the color film units are arranged in the color film holes in one-to-one correspondence; in the thickness direction of the display panel, the thickness of the color film unit positioned in the edge area is smaller than that of the color film unit positioned in the middle area; the area of the color film holes in the edge area is smaller than that of the color film holes in the middle area.

In an exemplary embodiment of the present disclosure, the color film holes near the periphery of the display panel have a smaller area in at least a part of two adjacent color film holes in the edge region.

In an exemplary embodiment of the present disclosure, in the color film holes having the same color, which are at least partially adjacent to each other in the edge region, the area of the color film holes near the periphery of the display panel is smaller.

In one exemplary embodiment of the present disclosure, the display panel includes a middle region and an edge region surrounding the middle region; in the thickness direction of the display panel, the thickness of the color film unit positioned in the edge area is smaller than that of the color film unit positioned in the middle area; the area of the pixel hole in the middle region is larger than the area of the pixel hole in the edge region.

In an exemplary embodiment of the present disclosure, the pixel holes located near the periphery of the display panel have a smaller area among at least partially adjacent two of the pixel holes in the edge region.

In an exemplary embodiment of the present disclosure, the pixel holes near the periphery of the display panel have a smaller area among at least partially adjacent two pixel holes of the same color in the edge region.

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

According to the display device, the color film layer is used as a COE structure, the color film layer can solve the problems of light reflection and light transmission, when external light is incident on the display panel, unnecessary light can be absorbed by the black matrix of the color film layer, the rest of the unnecessary light can be incident through RGB in the color film, and then the RGB pixel points can display colors and reflect. Some of the reflection process is blocked by BM area and the rest is absorbed by color film; the polarizer-free technology can lower the power consumption of the screen under the same display brightness or brighter the screen under the same power consumption; meanwhile, as the color film layer is coated, compared with the polaroid, the thickness of the screen can be greatly reduced, the service life of the folding screen is prolonged, and the manufacturing cost of the display panel is reduced. In addition, due to the fact that the transmittance of the COE structure is high, the problem that the reflectance is high exists under the condition that light is bright is solved, the pixel defining layer is made of black materials, the reflectance of incident light can be reduced through the pixel defining layer, and the problem that the reflectance is high under the condition that the light is bright due to the fact that the transmittance of the COE structure is high is solved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

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. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort. In the drawings:

FIG. 1 schematically illustrates a fringe pattern formed by monochromatic light interference;

FIG. 2 schematically shows a schematic diagram of interference fringes of light;

FIG. 3 schematically illustrates a stripe distribution over a pixel defining layer;

FIG. 4 schematically shows a schematic diagram of CD versus film thickness variation for a stripe region periodicity;

FIG. 5 schematically illustrates a schematic of matching of a display layer to a COE structural film layer;

FIG. 6 is a schematic diagram showing an opening through a pixel defining layer according to a first embodiment of the present disclosure, a portion of light being reflected to destroy interference effects;

FIG. 7 is a schematic diagram of via CD increase of a pixel defining layer provided by a first embodiment of the present disclosure;

FIG. 8 is a schematic illustration of a pixel defining layer partially recessed in a non-PS region of a black matrix to destroy optical interference according to a first embodiment of the present disclosure;

FIG. 9 is a schematic diagram showing the distribution of openings of a pixel defining layer in an interference concentrating region according to a first embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a black matrix over a pixel defining layer according to a second embodiment of the present disclosure;

FIG. 11 is a schematic CD-reduction diagram of a color film hole of a black matrix according to a second embodiment of the present disclosure;

FIG. 12 is a schematic view of a black matrix in an interference concentration area provided by a second embodiment of the present disclosure;

fig. 13 is a schematic diagram showing poor brightness around a display panel according to a third embodiment of the disclosure;

fig. 14 is a schematic view showing that a black matrix provided in the third embodiment of the present disclosure becomes larger in area of a light emitting area;

fig. 15 is a schematic line-by-line shrinking diagram of the area of a subpixel in a light-emitting area according to a third embodiment of the present disclosure.

Reference numerals illustrate:

100. a substrate; 110. a middle region; 120. an edge region;

200. driving the functional layer;

300. a flat layer;

400. a pixel defining layer; 401. a first thickness region; 402. a second thickness region; 410. a through hole;

500. A display layer; 510. a red subpixel; 520. a green sub-pixel; 530. a blue sub-pixel;

610. a light-transmitting layer; 620. a spacer;

700. an encapsulation layer;

800. a color film layer; 810. a black matrix; 820. a color film unit;

900. and (3) a protective layer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure. The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

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 for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with 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," and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not intended to limit the number of their objects.

Embodiments of the present disclosure first provide a display panel, as shown in fig. 6 and 10, including: the display device comprises a substrate 100, a driving function layer 200, a flat layer 300, a pixel defining layer 400, a display layer 500 and a packaging layer 700, wherein the driving function layer 200 is positioned on one side of the substrate 100, the flat layer 300 is positioned on one side of the driving function layer 200, which is away from the substrate 100, the pixel defining layer 400 is positioned on one side of the flat layer 300, which is away from the substrate 100, the pixel defining layer 400 is formed by black materials, and a plurality of pixel holes are formed on the pixel defining layer 400; the display layer 500 includes a plurality of sub-pixels, and the plurality of sub-pixels are located in the plurality of pixel holes in a one-to-one correspondence manner; the encapsulation layer 700 is located on a side of the display layer 500 facing away from the substrate 100; the color film layer 800 is located at a side of the encapsulation layer away from the display layer 500, where the color film layer 800 includes a black matrix 810 and a plurality of color film units 820, and the plurality of color film units 820 are disposed in one-to-one correspondence with the plurality of sub-pixels.

According to the display panel provided by the disclosure, the Color film layer 800 is used as a COE (Color Filter On Encapsulation) structure, the Color film layer 800 can solve the problems of light reflection and light transmission, when external light is incident on the display panel, unnecessary light can be absorbed by the Black Matrix 810 (BM) of the Color film layer 800, and the rest of the unnecessary light can be incident through RGB in the Color film (CF, color Filter), and then the RGB pixel point can display Color and reflect. Some of the reflection process is blocked by BM area and the rest is absorbed by color film; the polarizer-free technology can lower the power consumption of the screen under the same display brightness or brighter the screen under the same power consumption; meanwhile, the color film layer 800 is coated, so that the thickness of the screen can be greatly reduced compared with that of the polarizer, the service life of the folded screen can be prolonged, and the manufacturing cost of the display panel can be reduced.

In addition, since the light transmittance of the COE structure is high, there is a problem of high reflectivity in the case of bright light, the present disclosure can reduce the reflectivity of incident light through the pixel defining layer 400 by forming the pixel defining layer 400 of a black material, and overcome the problem of high reflectivity in the case of bright light caused by high light transmittance of the COE structure.

The substrate 100 may be an inorganic material, and the inorganic material may be a glass material such as soda-lime glass (soda-lime glass), quartz glass, or sapphire glass; the substrate 100 may also be an organic material, which may be polymethyl methacrylate (Polymethyl methacrylate, PMMA), polyvinyl alcohol (Polyvinyl alcohol, PVA), polyvinyl phenol (PVP), polyethersulfone (Polyether sulfone, PES), polyimide, polyamide, polyacetal, polycarbonate (PC), polyethylene terephthalate (Polyethylene terephthalate, PET), polyethylene naphthalate (Polyethylene naphthalate, PEN), or a combination thereof; in addition, the material of the substrate 100 may also be a flexible material, such as Polyimide (PI).

The driving functional layer 200 includes a plurality of driving transistors, each driving transistor is used for controlling a pixel electrode of each sub-pixel, and the pixel electrode may be an anode or a cathode. In detail, the driving function layer 200 includes a plurality of pixel driving circuits including at least a transistor TFT and a conductive structure for connecting the transistor TFT, and a plurality of signal wirings for supplying electric signals to the pixel driving circuits. For example, the driving function layer 200 includes, for example, an active layer formed on the substrate 100, a gate insulating layer covering the substrate 100 and the active layer, a gate layer disposed on the gate insulating layer, an interlayer dielectric layer covering the gate layer and the gate insulating layer, and a source/drain electrode layer disposed on the interlayer dielectric layer and connected to the active layer through a first via penetrating the interlayer dielectric layer and the gate insulating layer.

Wherein the flat layer 300 covers the source-drain electrode layer and the interlayer dielectric layer in the driving function layer 200, an anode is arranged on the flat layer 300, the anode is connected with the source-drain electrode layer through a via hole penetrating through the flat layer 300, the pixel defining layer 400 covers the flat layer 300 and part of the anode, the pixel defining layer 400 is provided with a plurality of pixel holes, and the anode in the pixel holes is not covered by the pixel defining layer 400; the display layer 500 includes a light emitting unit disposed within the pixel hole and a cathode electrode covering the pixel defining layer 400 and the light emitting unit. When a first voltage is applied to the anode electrode and a second voltage is applied to the cathode electrode through the driving function layer 200, the light emitting unit in the pixel hole emits light under the control of the voltage difference between the first voltage and the second voltage. The material of the flat layer 300 is, for example, any one of butadiene rubber, polyurethane, polyvinyl chloride, polyamide, or any one of polycarbonate, polyimide, polyetheralum, and epoxy.

The pixel defining layer 400 may be formed of a black negative photoresist, so that the reflectivity of incident light can be reduced by the pixel defining layer 400, and the problem of higher reflectivity under the condition of brighter light caused by higher transmittance of the COE structure is solved.

Wherein the encapsulation layer 700 is located on the pixel defining layer 400. The encapsulation layer 700 may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer. For example, a first encapsulation layer may be formed on a side of the light emitting layer facing away from the substrate 100 by a physical vapor deposition method or a chemical vapor deposition method, then a second encapsulation layer may be formed on a side of the first encapsulation layer facing away from the light emitting layer by an inkjet printing process, and then a third encapsulation layer may be formed on a side of the second encapsulation layer facing away from the first encapsulation layer by a physical vapor deposition method or a chemical vapor deposition method. The second packaging layer can be an organic packaging layer, and the first packaging layer and the third packaging layer can be inorganic packaging layers. By providing a plurality of inorganic encapsulation layers, the water and oxygen blocking capability of the encapsulation layer 700 can be improved, and by providing an organic encapsulation layer, planarization can be achieved. For example, the inner inorganic package and the outer inorganic package layer may be made of an inorganic material such as silicon nitride (SiN). The organic encapsulation layer may be made of a curable (e.g., photo-curable or thermosetting) organic material, for example, the organic encapsulation layer may be made of at least one of an epoxy-based organic material, an acrylate-based organic material, and an organosilicon-based material. In addition, the package structure may include not only the above-mentioned internal inorganic package layer, external inorganic package layer, and organic package layer, but also other inorganic package layers and organic package layers, which may be alternately stacked, without limitation of the present disclosure.

Among them, the COE structure can be formed by IJP (inkjet printing).

The display panel may further include a protective layer 900, where the protective layer 900 is disposed on a side of the color film layer 800 facing away from the pixel defining layer 400. The protective layer 900 may be a colorless Polyimide (PI) made of plastic with flexible properties, or Cover Glass (CG).

In the above-described embodiment, as shown in fig. 1 to 5, the pixel defining layer 400 is formed of a black material. In forming the pixel defining layer 400 in black by using a black material, it is generally necessary to use an exposure process step, in which a mura phenomenon is caused in the thickness of the pixel defining layer 400 formed when the pixel defining layer is formed using a negative photoresist material due to a bad phenomenon of Lens mura (Lens interference fringe) which is easily generated by an exposure apparatus, thereby causing the mura phenomenon to occur in an environment where light is brighter.

In one embodiment of the present disclosure, as shown in fig. 3, in a thickness direction of a display panel, a pixel defining layer 400 includes a plurality of first thickness regions 401 and a plurality of second thickness regions 402, and a thickness of the first thickness regions 401 is greater than a thickness of the second thickness regions 402; the plurality of first thickness regions 401 and the plurality of second thickness regions 402 extend along a first direction, the plurality of first thickness regions 401 and the plurality of second thickness regions 402 are alternately distributed along a second square, and the first direction intersects with a second direction, for example, the first direction is perpendicular to the second direction.

The pixel defining layer 400 further has a plurality of through holes 410 formed thereon, and the plurality of through holes 410 are located on the first thickness region 401. In detail, a plurality of stripe-shaped first thickness regions 401 are formed in parallel on the pixel defining layer 400 due to the mura phenomenon, and the first thickness regions 401 are alternately arranged with the second thickness regions 402. The thickness of the first thickness region 401 decreases in a direction from the center of the first thickness region 401 toward the second thickness region 402, i.e., the portion of the first thickness region 401 that protrudes is arc-shaped.

As shown in fig. 6 to 8, the display panel further includes: the light-transmitting layer 610, the plurality of through holes 410 are filled with the light-transmitting layer 610. By forming the through-hole 410 on the pixel defining layer 400, the light transmitting layer 610 is filled in the through-hole 410, and light can be reflected by the light transmitting layer 610 in the through-hole 410, so that light interference of the display panel is changed, and strong interference is not generated any more.

Specifically, as shown in fig. 9, among the plurality of through holes 410 located in the first thickness region 401, an area near the center of the first thickness region 401 is larger in at least partially adjacent two through holes 410. In the region of stronger interference, the PDL is perforated, and Via CD (Via critical dimension) can be increased by a fixed value by 0.5 μm to 2 μm, for example, 0.5 μm, 0.7 μm, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, 2 μm, etc., so that the light interference at the bottom of the interference concentration region is changed, no strong interference is generated, and the mura degree is reduced. Preferably, via CD can be increased by a fixed value by 1 μm to 1.5 μm on both sides, further reducing interference.

Wherein, the area of the adjacent two through holes 410 near the center of the first thickness region 401 may be made larger, or the area may be increased every second through hole 410, or the area may be increased every third through hole 410; the increase in CD of the through hole such as PDL is gradually increased from 0.5 μm to 1.5 μm to 2 μm, and the step thereof may be increased by 0.1 μm every two sub-pixels in the stitching region, or the like, which is not limited in the present application.

When the area of the through holes 410 increases, the areas of the different through holes 410 may increase linearly in the arrangement order, or increase non-linearly, for example, when CD reduction is performed, in each interference concentration area, the area with larger original change may have a center CD change larger than the edge, that is, the increase of the through holes 410 near the center of the first thickness area 401 is relatively larger.

As shown in fig. 9, the plurality of through holes 410 may have a rectangular shape, and the lengths of the plurality of through holes 410 may be the same, so as to adjust the area by changing the widths of the plurality of through holes 410; alternatively, the widths of the plurality of through holes 410 may be the same, and the sizes of the areas thereof may be adjusted by changing the lengths of the plurality of through holes 410. Of course, the through holes 410 may have a triangular shape, a polygonal shape with a greater number of sides than four, a circular shape, an elliptical shape, or an irregular shape, and the shapes of the plurality of through holes 410 may be the same or different.

Specifically, as shown in fig. 6 and 7, the display panel further includes: the spacer 620, the spacer 620 is located between the substrate 100 and the color film 800; the spacer (PS) 620 is the same material as the light-transmitting layer 610, i.e. the through holes 410 are filled by the spacer 620.

In the PS region of the display panel, as shown in fig. 6 and 7, PS is directly disposed in the through hole 410, so that the through hole 410 is filled and the supporting and isolating effects are achieved. At this time, PS is protruded from the through hole 410 due to the supporting and isolating function, i.e., PS is higher than PDL.

In the non-PS region of the display panel, as shown in fig. 8, the material density of the pixel defining layer 400 is greater than that of the light-transmitting layer 610; in the direction of the light-transmitting layer 610 facing the color film layer 800, at least part of the surface of the light-transmitting layer 610 in the through hole 410 is lower than the surface of the pixel defining layer 400, i.e. a concave region is formed in the through hole 410, and the concave region forms a sinking region in a region corresponding to the BM, so as to destroy the interference distribution when exposing the BM, thereby reducing the occurrence of interference fringes.

In one embodiment of the present disclosure, as shown in fig. 3, in a thickness direction of the display panel, the pixel defining layer 400 includes a plurality of first thickness regions 401 and a plurality of second thickness regions 402, the thickness of the first thickness regions 401 is greater than that of the second thickness regions 402, the plurality of first thickness regions 401 and the plurality of second thickness regions 402 extend along a first direction, the plurality of first thickness regions 401 and the plurality of second thickness regions 402 are alternately distributed along a second direction, and the first direction intersects the second direction, for example, the first direction is perpendicular to the second direction. The thickness of the first thickness region 401 decreases in a direction from the center of the first thickness region 401 toward the second thickness region 402. In detail, a plurality of stripe-shaped first thickness regions 401 are formed in parallel on the pixel defining layer 400 due to the mura phenomenon, and the first thickness regions 401 are alternately arranged with the second thickness regions 402. The thickness of the first thickness region 401 decreases in a direction from the center of the first thickness region 401 toward the second thickness region 402, i.e., the portion of the first thickness region 401 that protrudes is arc-shaped.

Specifically, as shown in fig. 10 to 12, the black matrix 810 has a plurality of color film holes, the plurality of color film holes are disposed in one-to-one correspondence with the plurality of pixel holes, the plurality of color film units 820 are disposed in one-to-one correspondence with the plurality of color film holes, and the area of the color film holes disposed in the first thickness region 401 is larger than the area of the color film holes disposed in the second thickness region 402. The area of the color film holes in the first thickness region 401 is larger than that of the color film holes in the second thickness region 402, so that the CD of the BM is changed, the interference concentration region avoids the splicing region, strong interference is not generated any more, and the mura degree is reduced.

Specifically, as shown in fig. 12, among the plurality of color film holes located in the first thickness region 401, an area near the center of the first thickness region 401 is larger in at least two adjacent color film holes. In the area with stronger interference, the CD of the color film hole is increased by two sides of 0.5-3 μm, such as 0.5 μm, 0.7 μm, 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, 2 μm, 2.2 μm, 2.5 μm, 2.8 μm, 3 μm and the like, so that the interference concentration area avoids the splicing area, and the mura degree is reduced; preferably, CD of the color film hole is increased by 1-1.5 μm on both sides, so that interference is further reduced.

The area of two adjacent color film holes near the center of the first thickness region 401 may be larger, or the area of every second color film hole may be increased, or the area of every third color film hole may be increased; for example, the CD of the color film hole is gradually increased from 1 μm to 2 μm to 1.5 μm to 3 μm, the step can be increased by 0.1 μm every two sub-pixels in the splicing area, or the like, and the application is not limited thereto.

When the areas of the color film holes are increased, the areas of the different color film holes may be increased linearly according to the arrangement sequence, or may be increased non-linearly, for example, when the CD of the color film holes is increased, in each interference concentration area, the CD of the color film hole in the center thereof may be changed more than the edge, that is, the increase of the color film hole near the center of the first thickness area 401 is relatively larger.

The color film holes can be rectangular, the lengths of the color film holes can be the same, and the area of the color film holes can be adjusted by changing the widths of the color film holes; or the widths of the color film holes can be the same, and the area of the color film holes can be adjusted by changing the lengths of the color film holes. Of course, the color film holes can also be triangular, polygonal, circular, elliptical or irregular with the number of sides larger than four, and the shapes of the color film holes can be the same or different.

Specifically, when the sizes of the plurality of sub-pixels with different colors are the same, the area, close to the center of the first thickness region 401, of the two color film holes corresponding to the two adjacent sub-pixels with the same color is larger; when the sizes of the plurality of sub-pixels with different colors are different, for example, in an RGGB arrangement manner as shown in fig. 12, the area of the blue sub-pixel 530 is larger than that of the red sub-pixel 510, and the area of the red sub-pixel 510 is larger than that of the green sub-pixel 520, so that when the CD of the color film hole is adjusted, the area, close to the center of the first thickness region 401, of the two color film holes corresponding to at least two adjacent sub-pixels with the same color is larger, so that the interference concentration region avoids the splicing region, no strong interference is generated, and the mura degree is reduced.

As shown in fig. 13, in the COE structure, since the edge position IJP (inkjet printing) break difference is large, the RGB film layers of the CF are different from the intermediate film thickness at the edge, that is, the thickness of the color film unit located in the edge region 120 is smaller than the thickness of the color film unit located in the intermediate region 110 in the thickness direction of the display panel. As CF becomes thinner in the edge region 120, its transmittance increases significantly, thereby causing the display panel to appear to be shiny all around.

In view of the above technical problems, in one embodiment of the present disclosure, a display panel includes a middle region 110 and an edge region 120, the edge region 120 surrounding the middle region 110; the black matrix 810 is provided with a plurality of color film holes, the plurality of color film holes are arranged in one-to-one correspondence with the plurality of pixel holes, and the plurality of color film units 820 are arranged in the plurality of color film holes in one-to-one correspondence; as shown in fig. 14, the area of the color film holes in the edge region 120 is smaller than the area of the color film holes in the middle region 110. By reducing the CD of the color film hole in the edge brightness area, the luminous efficiency of the pixel is reduced, thereby reducing the luminous brightness of the edge area 120, reducing the brightness difference change of the edge area 120, and improving the brightness phenomenon around.

The display panel may be rectangular, for example, and the edge area 120 may be 5% -15% of the dimension of the display panel in the length direction or the width direction.

Specifically, from the actual product situation, the brightness difference between the middle region 110 and the edge region 120 is generally about 10% -20%, and the brightness distribution is generally a gradual trend. The original excessive light shielding is gradually inhibited by increasing the BM area of the edge area 120, i.e. shrinking the CD of the color film hole, from the area where the brightness difference starts, so as to reduce the brightness difference variation of the edge area 120, and optimize the brightness difference by Demura.

As shown in fig. 14, in at least part of the two adjacent color film holes in the edge area 120, the area of the color film hole near the periphery of the display panel is smaller. Considering that a faster change may cause other defects, the size of the color film hole is changed uniformly and gradually, thereby reducing the brightness difference change of the edge area 120.

Specifically, when the sizes of the plurality of sub-pixels with different colors are the same, the areas, close to the periphery of the display panel, of the two color film holes corresponding to the two adjacent sub-pixels with the same color in the edge area 120 are smaller; when the sizes of the plurality of sub-pixels with different colors are different, for example, in an RGGB arrangement manner as shown in fig. 14, the area of the blue sub-pixel 530 is larger than that of the red sub-pixel 510, and the area of the red sub-pixel 510 is larger than that of the green sub-pixel 520, so that when the CD of the color film hole is adjusted, the area, close to the periphery of the display panel, of the two color film holes corresponding to at least two adjacent sub-pixels with the same color in the edge area 120 is smaller, thereby reducing the brightness difference variation in the edge area 120.

Wherein, the area of every color film hole can be reduced by 0.1% -0.5% (according to the area difference of the luminous areas), and the area of the color film hole size reduced to the edge area 120 is 5% -15%, such as 5%, 8%, 10%, 12% or 15%, etc. of the original area; or the area of every second color film hole is reduced, or the area of every third color film hole is reduced.

When the areas of the color film holes are reduced, the areas of different color film holes can be reduced linearly or reduced non-linearly according to the arrangement sequence.

The color film holes can be rectangular, the lengths of the color film holes can be the same, and the area of the color film holes can be adjusted by changing the widths of the color film holes; or the widths of the color film holes can be the same, and the area of the color film holes can be adjusted by changing the lengths of the color film holes. Of course, the color film holes may also have a triangular shape, a polygonal shape with sides greater than four, a circular shape, an elliptical shape, or an irregular shape, and the shapes of the plurality of through holes 410 may be the same or different.

In addition, considering that the luminous efficiency of the green sub-pixel 520 tends to be highest, resulting in green tends to be high, and the surrounding luminance tends to be green, the CD of the color film hole of the green sub-pixel 520 may be relatively small to improve the problem of surrounding luminance.

In one embodiment of the present disclosure, as shown in fig. 13, the display panel includes a middle region 110 and an edge region 120, the edge region 120 surrounds the middle region 110, and a thickness of a color film unit located in the edge region 120 is smaller than a thickness of a color film unit located in the middle region 110. As shown in fig. 15, the area of the pixel hole in the middle region 110 is larger than the area of the pixel hole in the edge region 120. By reducing the CD of the pixel hole in the edge lighting area, the aperture ratio of the corresponding pixel Kong Zhongzi is reduced, so that the light emitting efficiency is reduced, the light emitting brightness of the edge area 120 is reduced, and the brightness difference variation of the edge area 120 is reduced, so as to improve the brightness of the periphery.

Specifically, from the actual product situation, the brightness difference between the middle region 110 and the edge region 120 is generally about 10% -20%, and the brightness distribution is generally a gradual trend. The change in the brightness difference in the edge region 120 can be reduced by gradually reducing the CD of the pixel hole from the region where the brightness difference starts, so that the original transition is gradually suppressed by the decrease in the luminous efficiency of the sub-pixel.

Among the two pixel holes at least partially adjacent to each other in the edge region 120, the pixel holes near the periphery of the display panel have a smaller area. Considering that a faster change may cause other defects, the pixel aperture size change is a uniform stepwise change, thereby reducing the variation in brightness difference of the edge region 120.

Specifically, when the sizes of the plurality of sub-pixels with different colors are the same, the areas, close to the periphery of the display panel, of the two pixel holes corresponding to the two adjacent sub-pixels with the same color in the edge area 120 can be made smaller; when the sizes of the plurality of sub-pixels with different colors are different, for example, in the RGGB arrangement shown in fig. 15, the area of the blue sub-pixel 530 is larger than that of the red sub-pixel 510, and the area of the red sub-pixel 510 is larger than that of the green sub-pixel 520, so that when the CD of the pixel hole is adjusted, the area of at least two adjacent sub-pixels with the same color in the edge area 120, which is close to the periphery of the display panel, is smaller, thereby reducing the brightness difference variation in the edge area 120.

Wherein, the area of every other pixel hole can be reduced by 0.1% -0.5% (according to the area difference of the luminous area), and the area of the reduced size of the pixel hole reaching the edge area 120 is 5% -15%, such as 5%, 8%, 10%, 12% or 15%, etc. of the original area; or the area is reduced every two pixel holes or every three pixel holes.

When the areas of the pixel holes are reduced, the areas of different pixel holes can be reduced linearly or reduced non-linearly according to the arrangement sequence.

The pixel holes can be rectangular, the lengths of the pixel holes can be the same, and the area of the pixel holes can be adjusted by changing the widths of the pixel holes; alternatively, the widths of the plurality of pixel holes may be the same, and the area of the plurality of pixel holes may be adjusted by changing the lengths of the plurality of pixel holes. Of course, the pixel hole may have a triangular shape, a polygonal shape with a number of sides greater than four, a circular shape, an elliptical shape, or an irregular shape, and the shapes of the plurality of through holes 410 may be the same or different.

In addition, considering that the light emitting efficiency of the green sub-pixel 520 tends to be highest, resulting in green tends to be high, and the surrounding light tends to be green, the CD of the pixel hole of the green sub-pixel 520 may be relatively small to improve the problem of the surrounding light emitting.

The embodiment of the disclosure also provides a display device, which comprises the display panel provided by the embodiment. The display device may be, for example, a device with a display function, such as a mobile phone, a tablet computer, an advertisement screen, a vehicle-mounted display screen, and the like, which are not specifically mentioned herein. According to the display device provided by the disclosure, the color film layer 800 is used as a COE structure, the color film layer 800 can solve the problems of light reflection and light transmission, when external light is incident on the display panel, unnecessary light can be absorbed by the black matrix 810 of the color film layer 800, the rest can be incident through RGB in the color film, and then the RGB pixel points can display colors and reflect. Some of the reflection process is blocked by BM area and the rest is absorbed by color film; the polarizer-free technology can lower the power consumption of the screen under the same display brightness or brighter the screen under the same power consumption; meanwhile, the color film layer 800 is coated, so that the thickness of the screen can be greatly reduced compared with that of the polaroid, the service life of the folded screen can be prolonged, and the manufacturing cost of the display panel can be reduced. In addition, since the light transmittance of the COE structure is high, there is a problem of high reflectivity in the case of bright light, the present disclosure can reduce the reflectivity of incident light through the pixel defining layer 400 by forming the pixel defining layer 400 of a black material, and overcome the problem of high reflectivity in the case of bright light caused by high light transmittance of the COE structure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (15)

1. A display panel, comprising:

a substrate;

a driving functional layer located at one side of the substrate;

a pixel defining layer on a side of the driving function layer facing away from the substrate, the pixel defining layer being formed of a black material, the pixel defining layer having a plurality of pixel holes formed thereon;

The display layer comprises a plurality of sub-pixels, and the sub-pixels are located in the pixel holes in a one-to-one correspondence manner;

the packaging layer is positioned on one side of the display layer away from the substrate;

the color film layer is positioned on one side, away from the display layer, of the packaging layer, and comprises a black matrix and a plurality of color film units, wherein the color film units are arranged in one-to-one correspondence with the sub-pixels.

2. The display panel according to claim 1, wherein in a thickness direction of the display panel, the pixel defining layer includes a plurality of first thickness regions and a plurality of second thickness regions, a thickness of the first thickness regions being greater than a thickness of the second thickness regions; the plurality of first thickness regions and the plurality of second thickness regions extend along a first direction, the plurality of first thickness regions and the plurality of second thickness regions are alternately distributed along a second square, and the first direction intersects the second direction; a plurality of through holes are formed on the pixel defining layer, and the through holes are positioned on the first thickness area;

the display panel further includes: and the light-transmitting layer is filled with a plurality of through holes.

3. The display panel according to claim 2, wherein a thickness of the first thickness region decreases in a direction from a center of the first thickness region toward the second thickness region; and the areas, close to the center of the first thickness region, of the two at least partially adjacent through holes are larger in the plurality of through holes located in the first thickness region.

4. The display panel of claim 2, further comprising: the spacer is positioned between the substrate and the color film layer; the material of the isolation pad is the same as that of the light-transmitting layer.

5. The display panel according to claim 2, wherein a material density of the pixel defining layer is greater than a material density of the light transmitting layer; in the direction of the light-transmitting layer facing the color film layer, at least part of the surface of the light-transmitting layer in the through hole is lower than the surface of the pixel defining layer.

6. The display panel according to claim 1, wherein in a thickness direction of the display panel, the pixel defining layer includes a plurality of first thickness regions and a plurality of second thickness regions, a thickness of the first thickness regions being greater than a thickness of the second thickness regions; the plurality of first thickness regions and the plurality of second thickness regions extend along a first direction, the plurality of first thickness regions and the plurality of second thickness regions are alternately distributed along a second square, and the first direction intersects the second direction; the thickness of the first thickness region decreases from the center of the first thickness region toward the second thickness region;

The black matrix is provided with a plurality of color film holes, the color film holes and the pixel holes are arranged in one-to-one correspondence, the color film units are positioned in the color film holes in one-to-one correspondence, and the area of the color film holes in the first thickness area is larger than that of the color film holes in the second thickness area.

7. The display panel of claim 6, wherein an area of at least a portion of two adjacent color film holes among the plurality of color film holes located in the first thickness region is larger near a center of the first thickness region.

8. The display panel according to claim 6, wherein, among the plurality of color filter holes located in the first thickness region, an area of the two color filter holes corresponding to the sub-pixels having the same color, which are at least partially adjacent, is larger near the center of the first thickness region.

9. The display panel of claim 1, wherein the display panel comprises a middle region and an edge region, the edge region surrounding the middle region; the black matrix is provided with a plurality of color film holes, the color film holes are arranged in one-to-one correspondence with the pixel holes, and the color film units are arranged in the color film holes in one-to-one correspondence; in the thickness direction of the display panel, the thickness of the color film unit positioned in the edge area is smaller than that of the color film unit positioned in the middle area; the area of the color film holes in the edge area is smaller than that of the color film holes in the middle area.

10. The display panel of claim 9, wherein the color film holes located near the periphery of the display panel are smaller in area in at least a portion of two adjacent color film holes located in the edge region.

11. The display panel of claim 9, wherein the color film holes located in the edge region at least partially adjacent to each other have a smaller area near the periphery of the display panel.

12. The display panel of claim 1, wherein the display panel comprises a middle region and an edge region, the edge region surrounding the middle region; in the thickness direction of the display panel, the thickness of the color film unit positioned in the edge area is smaller than that of the color film unit positioned in the middle area; the area of the pixel hole in the middle region is larger than the area of the pixel hole in the edge region.

13. The display panel of claim 12, wherein the pixel holes located near the periphery of the display panel are smaller in area in at least partially adjacent two of the pixel holes located in the edge region.

14. The display panel of claim 12, wherein the pixel holes located in the edge region at least partially adjacent to each other have a smaller area near the periphery of the display panel.

15. A display device comprising the display panel according to any one of claims 1 to 14.