CN110137384A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110137384A CN110137384A CN201910580222.8A CN201910580222A CN110137384A CN 110137384 A CN110137384 A CN 110137384A CN 201910580222 A CN201910580222 A CN 201910580222A CN 110137384 A CN110137384 A CN 110137384A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/822—Cathodes characterised by their shape
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/828—Transparent cathodes, e.g. comprising thin metal layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
It includes several sub-pixels that the embodiment of the present invention, which provides a kind of display panel and display device, display panel, and each sub-pixel includes: anode layer, pixel layer and the cathode layer being cascading along first direction；Cathode layer includes the first cathode layer and the second cathode layer being stacked along first direction, wherein the second cathode layer includes several through-holes.Second cathode layer is provided with several through-holes, so that diffraction zone can be formed by multiple through-holes by enabling the second cathode layer region of sub-pixel, enables light by diffraction can occur when diffraction zone.When light project away from luminescent layer by cathode layer, since the first cathode layer is relatively thin, and it is bad so as to improve colour cast to occur when light is by diffraction zone diffraction dispersion, can be good at the colour cast defect of solution display panel.
Description
Technical field
The present invention relates to display equipment technical field more particularly to a kind of display panel and display devices.
Background technique
Organic Light Emitting Diode (Organic Light-Emitting Diode；It OLED) is active luminescent device.With biography
Liquid crystal display (the Liquid Crystal Display of system；LCD) display mode is compared, and OLED display technology is not necessarily to backlight,
With self luminous characteristic.OLED uses relatively thin organic material film laye and glass substrate, when a current passes through, organic material
It will shine.Therefore OLED display panel can save significantly on electric energy, can be made lighter and thinner, be resistant to than LCD display panel
The temperature change of wider range, and visible angle is bigger.OLED display panel is expected to become the next-generation plate after LCD
Display technology is most one of technology that attracts attention in current flat panel display.
Active matrix organic light-emitting diode (Active-matrix organic light-emitting diode,
AMOLED) as one kind of OLED, emission structure at top is used, introduces micro-cavity structure to modulate the wavelength of emergent light.
The layer structure of AMOLED includes cathode layer, anode layer and the luminescent layer being arranged between cathode layer and anode layer, anode layer and
Fabry-Perot cavity is formed between cathode layer.Wherein the anticathode reflectivity of the thickness of cathode layer has a direct impact.Work as gold
When the category larger reflectivity of thickness degree is larger, there is serious colour cast in AMOLED.When thinned cathode electrode layer thickness improves colour cast,
It will cause the problem of display picture transition unevenness.
Therefore, a kind of new display panel and display device are needed.
Summary of the invention
The embodiment of the present invention provides a kind of display panel and display device, it is intended to reduce the same of display panel colour cast defect
When, additionally it is possible to improve the problem of display panel picture transition unevenness.
On the one hand the embodiment of the present invention provides a kind of display panel, including several sub-pixels, each sub-pixel includes:
Anode layer, luminescent layer and the cathode layer being cascading along first direction；Cathode layer includes being stacked along first direction
First cathode layer and the second cathode layer, wherein the second cathode layer includes several through-holes.
According to an aspect of the present invention, the first cathode layer is located at the second cathode layer close to the side of luminescent layer.
According to an aspect of the present invention, in each sub-pixel, the quantity of through-hole is two or more, more than two logical
Hole is in any one of linear, annular or array equidistantly distributed.
According to an aspect of the present invention, through-hole is in rectangle along projection of the first direction on the first cathode layer, and through-hole
The long side a of projection elongation moulding in a second direction, the broadside b of through-hole projection is along third direction elongation moulding；
Wherein, second direction and third direction intersect with first direction, and in each sub-pixel, and each through-hole is along second
Direction and/or third direction distribution；
Preferably, in each sub-pixel, the quantity of through-hole is two, and two through-holes are in linear equidistantly distributed；Or
The quantity of through-hole is three, three through-holes equidistantly distributed in a ring；Alternatively, the quantity of through-hole is four or more, four or more
Through-hole be in array equidistantly distributed.
According to an aspect of the present invention, long side a and broadside b meet following relationship:
Wherein, N1、N2、N3It is positive integer, λ is the wavelength for the light that sub-pixel issues, and D is between two neighboring through-hole
Spacing.
According to an aspect of the present invention, through-hole is square along projection of the first direction on the first cathode layer, and away from
It is equal to long side a from D.
According to an aspect of the present invention, between each sub-pixel, the long side a and/or broadside b of through-hole projection are parallel.
According to an aspect of the present invention, the thickness of the first cathode layer in a first direction is less than or equal to the second cathode layer
Thickness in a first direction.
According to an aspect of the present invention, the first cathode layer with a thickness of 4nm~9nm；
And/or second cathode layer with a thickness of 6nm~16nm；
And/or the overall thickness of cathode layer in a first direction is 10nm~25nm.
Second embodiment of the invention also provides a kind of display device, including above-mentioned display panel.
In the present invention, display panel includes several sub-pixels, and each sub-pixel includes stacking gradually along first direction
Anode layer, luminescent layer and the cathode layer of setting.Wherein, two layers of cathode layer, respectively the first cathode layer and the second cathode layer, the
Two cathode layers are provided with several through-holes, so that diffraction can be formed by multiple through-holes by enabling the second cathode layer region of sub-pixel
Area enables light by diffraction can occur when diffraction zone.When light projects away from luminescent layer by cathode layer, due to first
Cathode layer is relatively thin, and it is bad so as to improve colour cast to occur when light is by diffraction zone diffraction dispersion, can be good at solving
The colour cast defect of display panel.The first cathode layer and the second cathode layer are superimposed simultaneously, can be improved the thickness of entire cathode layer,
So as to improve the problem of picture transition unevenness.Therefore the present invention can be while reducing display panel colour cast defect, additionally it is possible to
Improve the problem of display panel picture transition unevenness.
Detailed description of the invention
By reading detailed description of non-limiting embodiments referring to the drawings, other feature of the invention,
Objects and advantages will become more apparent upon, wherein the same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 is a kind of schematic diagram of a layer structure of display panel of the embodiment of the present invention；
Fig. 2 is a kind of plane structure chart of display panel of another embodiment of the present invention；
Fig. 3 is Fraunhofer diffraction schematic illustration；
Fig. 4 is Fraunhofer diffraction light distribution schematic diagram；
Fig. 5 is a kind of flow chart of display panel manufacturing method of the embodiment of the present invention.
Description of symbols:
100, anode layer；
200, luminescent layer；
210, open region；211, the first sub-pixel open region；212, the second sub-pixel open region；213, third sub-pixel is opened
Mouth region；
300, cathode layer；
310, the first cathode layer；
320, the second cathode layer；321, through-hole；321a, first through hole；321b, the second through-hole；321c, third through-hole.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.In attached drawing and following
Description in, at least part of known features and technology are not shown, unnecessary fuzzy to avoid causing the present invention；
Also, for clarity, may be exaggerated the size of part-structure.In addition, feature described below, structure or characteristic can be with
It is incorporated in one or more embodiments in any suitable manner.
In the description of the present invention, it should be noted that unless otherwise indicated, the meaning of " plurality " is two or more；Art
The orientation or positional relationship of the instructions such as language "upper", "lower", "left", "right", "inner", "outside" be merely for convenience of description the present invention and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " etc. are used for description purposes only, and
It cannot be understood as indicating or implying relative importance.
The noun of locality of middle appearance described below is direction shown in figure, is not to the specific of the embodiment of the present invention
Structure is defined.In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " peace
Dress ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be to be connected directly, can also be indirectly connected.For the ordinary skill in the art, visual concrete condition understands above-mentioned
The concrete meaning of term in the present invention.
For a better understanding of the present invention, below with reference to Fig. 1 to Fig. 4 display panel according to an embodiment of the present invention and display
Device is described in detail.
Fig. 1 is a kind of schematic diagram of a layer structure of display panel provided in an embodiment of the present invention, and display panel includes several
Sub-pixel, each sub-pixel include: anode layer 100, luminescent layer 200 and the cathode layer 300 being cascading along first direction；
Wherein；Cathode layer 300 includes the first cathode layer 310 and the second cathode layer 320 being stacked along first direction, the second cathode layer
320 include several through-holes 321.
First direction can be the thickness direction of display panel, i.e. Z-direction in Fig. 1.
It is not limited here, through-hole 321 can be the blind hole for being set to the second cathode layer 320 to the set-up mode of through-hole 321
Or through-hole 321 is arranged through the second cathode layer 320.Preferably, through-hole 321 is arranged through the second cathode layer 320, is convenient for through-hole
321 preparation molding.In the present invention, display panel includes the anode layer 100, luminescent layer 200 and cathode layer being stacked
300.Wherein, cathode layer 300 is two layers, respectively the first cathode layer 310 and the second cathode layer 320, the setting of the second cathode layer 320
There are multiple through-holes 321, is capable of forming diffraction zone in 321 region of through-hole, diffraction can be occurred by the light of diffraction zone by enabling.
When light project away from luminescent layer 200 by cathode layer 300, since the first cathode layer 310 is relatively thin, and when light passes through the
It is bad so as to improve colour cast that diffraction dispersion can occur when the diffraction zone of two cathode layers 320, can be good at solving display panel
Colour cast defect；It is also superimposed with the second cathode layer 320 on the first cathode layer 310 simultaneously, can be improved the thickness of entire cathode layer 300
Degree, so as to improve the problem of picture transition unevenness.Therefore the present invention can be while reducing display panel colour cast defect, moreover it is possible to
Enough improve the problem of display panel picture transition unevenness.
There are many molding modes of first cathode layer 310 and the second cathode layer 320, and the first cathode layer 310 is steamed using whole face
The modes such as plating or brushing are formed, and the second cathode layer 320 can be deposited to be formed using mask plate.Preferably, the first cathode layer 310
Positioned at the second cathode layer 320 close to the side of luminescent layer 200, convenient for being prepared into for the first cathode layer 310 and the second cathode layer 320
Type.
The set-up mode of display panel is not limited only to this, such as is also provided between anode layer 100 and luminescent layer 200
Other layer of structure, such as have hole injection layer, hole transmission layer etc., it is also provided between luminescent layer 200 and cathode layer 300
Other layer of structure, such as electron transfer layer and electron injecting layer etc., as long as display panel includes stacking gradually to set along first direction
Anode layer 100, luminescent layer 200 and the cathode layer 300 set.
Sub-pixel is correspondingly formed in open region 210 in luminescent layer 200, and there are many set-up modes of sub-pixel, such as son
Pixel includes the first sub-pixel, the second sub-pixel and third sub-pixel, and the first sub-pixel, the second sub-pixel and third sub-pixel can
To be respectively red sub-pixel, green sub-pixels and blue subpixels.Then sub-pixel is correspondingly formed the first sub-pixel in open region
Open region 211, the second sub-pixel open region 212 and third sub-pixel open region 213.Second cathode layer 320 corresponds to open region
210 are provided with multiple through-holes 321, and the second cathode layer 320 corresponds to the first sub-pixel open region 211 and is formed with first through hole
321a, the second cathode layer 320 correspond to the second sub-pixel open region 212 and are formed with the second through-hole 321b, and the second cathode layer 320 is right
First through hole 321c should be formed in third sub-pixel open region 213.
Due to the wavelength difference for the light that different colours sub-pixel issues, diffraction when diffraction occurs for different colours light
Path is also different.Multiple through-holes 321 include the first through hole 321a for corresponding respectively to three Ge Zi pixel openings areas 210, second logical
Hole 321b and third through-hole 321c, convenient for the light that is issued according to different colours sub-pixel wavelength adjustment first through hole 321a, the
The size of two through-hole 321b and third through-hole 321c enables the light of different colours sub-pixel show after diffraction and tends to one
It causes, further improves colour cast defect, improve the display effect of display panel.
321 numbers of through-hole in each sub-pixel are it is not limited here, it is preferred that in order to guarantee display effect, each
In sub-pixel, the quantity of through-hole 321 is two or more, and more than two through-holes 321 are in any one of linear, annular or array
Equidistantly distributed.
That is the number of first through hole 321a, the second through-hole 321b and third through-hole 321c it is not limited here, in order to guarantee
Display effect, first through hole 321a, the second through-hole 321b and third through-hole 321c are two or more, and more than two first is logical
Hole 321a, more than two second through-hole 321b or more than two third through-hole 321c are in appointing in linear, annular or array
One equidistantly distributed.
It is not limited here, in some alternative embodiments, through-hole 321 is along first direction for the shape of through-hole 321
Projection on one cathode layer 310 is in rectangle, and elongation moulding, through-hole 321 project the long side a of the projection of through-hole 321 in a second direction
Broadside b along third direction elongation moulding；Wherein, second direction and third direction intersect with first direction, and in every height
In pixel, several through-holes 321 are in a second direction and/or third direction is distributed.
It is not limited here, such as second direction and third direction are respectively the set-up mode of second direction and third direction
The length direction and width direction of display panel.For example, second direction is the X-direction in Fig. 2, third direction is in Fig. 1 and Fig. 2
Y-direction.
In these optional embodiments, through-hole 321 is projected as rectangle, and multiple through-holes 321 are along its long side a and/or width
The extending direction of side b is distributed, and can guarantee that corresponding to each sub-pixel area forms diffraction grating, to further increase diffraction point
Effect is dissipated, the colour cast of display panel is reduced.
Preferably, when the quantity of through-hole 321 is two, two through-holes 321 are embarked on journey or the linear shapes arrangement such as in column.Example
Such as X-direction or Y-direction distribution of two through-holes 321 in figure.When the quantity of through-hole 321 is three, three through-holes 321 are in ring
Shape shape is equidistantly arranged.When through-hole 321 is four or more, more than four through-holes 321 are equidistantly arranged in array.It can
Guarantee that the spacing between each through-hole 321 is equal as far as possible, to guarantee diffracting effect of the light by each through-hole 321 when.Here
Through-hole 321 can be any one of first through hole 321a, the second through-hole 321b or third through-hole 321c.Here open region
210 can be any in the first sub-pixel open region 211, the second sub-pixel open region 212 or third sub-pixel open region 213
Person.
Preferably, as shown in Fig. 2, for the structure for the displaying display panel of the embodiment of the present invention being more clear in Fig. 2,
First sub-pixel shown in dotted line open region 211, the second sub-pixel open region 212 and third sub-pixel on second cathode layer 320
Open region 213, it is to be appreciated that the dotted line in Fig. 2 does not constitute the structure qualification to the second cathode layer 320.First through hole
321a, the second through-hole 321b and third through-hole 321c are in a second direction array distribution with third direction.
As shown in Fig. 2, first through hole 321a is four, four first through hole 321a correspond to the first sub-pixel open region
211 be in array distribution, and the second through-hole 321b is similarly four, and four the second through-hole 321b correspond to the second sub-pixel open region
212 be in array distribution, and third through-hole 321c is ten, and ten third through-hole 321c correspond to third sub-pixel open region 213 and are in
Array distribution.It is understood that the number of first through hole 321a, the second through-hole 321b and third through-hole 321c are not limited only to
This, the number of first through hole 321a, the second through-hole 321b and third through-hole 321c can according to the first sub-pixel open region 211,
The size of second sub-pixel open region 212 and third sub-pixel open region 213 is adjusted.
In any of the above-described embodiment, the diffraction types that through-hole 321 occurs in diffraction zone it is not limited here, preferably
, through-hole 321 is capable of forming Fraunhofer diffraction in diffraction zone, using Fraunhofer diffraction principle, improves display panel
Display effect.
As shown in figure 3, being Fraunhofer diffraction schematic illustration, every slit width is a in fraunhofer grating, is blocked between seam
Partial width is b, and the distance d=a+b of corresponding points, so much seam Fraunhofer diffraction light distribution are as follows in adjacent slots:
Wherein, the α in formula (1) andIt is respectively as follows:
More seam Fraunhofer diffraction actual light intensity distributions are as shown in Figure 4；
Although needing to project diffraction light using convex lens in Fraunhofer diffraction, in display panel because with
Family eyes and the viewing distance of display panel macroscopically farther out, much larger than the f in figure, it is believed that be to observe at infinity,
I.e. viewing distance is much larger than slit width a, much larger than the size of diffraction zone inner via hole 321 on the second cathode layer 320, therefore does not need
Mirror.Shield portions in Fraunhofer diffraction are equivalent to the second cathode layer of part in diffraction zone between two neighboring through-hole 321
320。
Since display panel shines for face, the number of three sub-pixels and the number of corresponding through-hole 321 are all very more, because
This light distribution after diffraction in entire surface is more uniform.
When using more seam Fraunhofer diffraction principle, through-hole 321 is the tetragonous post holes of rectangle, then in order to guarantee that diffraction is imitated
Fruit, long side a and the broadside b meet following relationship:
Wherein, N1、N2、N3It is positive integer, λ is the wavelength for the light that the sub-pixel issues, and D is two neighboring described logical
Spacing between hole.
That is the first long side a of first through hole 321a projection1With the first broadside b1, the second through-hole 321b projection the second long side
a2With the second broadside b2, third through-hole 321c projection third long side a3With third broadside b3Meet following relationship:
Wherein, N4、N5、N6、N7、N8、N9、N10、N11、N12It is positive integer, λ1For the wave for the light that the first sub-pixel issues
It is long, λ2For the wavelength for the light that the second sub-pixel issues, λ3For the wavelength for the light that third sub-pixel issues, D1It is two neighboring first
First distance between through-hole 321a, D2For the second distance between two neighboring second through-hole 321b, D3For two neighboring third
Third distance between through-hole 321c.
Further, in order to reduce the complexity of display panel manufacturing process, color divergence effect is further increased, is led to
Hole 321 is square along projection of the first direction on the first cathode layer 310, and distance D is equal to long side a.
That is first through hole 321a, the second through-hole 321b and third through-hole 321c are along first direction on the first cathode layer 310
Projection it is square, and first distance D1Equal to the first long side a1, second distance D2Equal to the second long side a2, third distance D3
Equal to third long side a1。
It is understood that when X-direction and Y-direction are in array distribution to more than two first through hole 321a along Fig. 2,
First distance D1It can be the distance between two neighboring first through hole 321a in the X direction, or adjacent in the Y direction
The distance between two first through hole 321a.Preferably, more than two first through hole 321a are open corresponding to the first sub-pixel
Area 211 is uniformly distributed, then the spacing distance of two neighboring first through hole 321a in the X direction is equal to its interval in the Y direction
Distance further increases display effect.
Likewise, when X-direction and Y-direction are in array distribution to more than two second through-hole 321b along Fig. 2, second away from
From D2It can be the distance between two neighboring second through-hole 321b in the X direction, or in the Y direction two neighboring the
The distance between two through-hole 321b.Preferably, more than two second through-hole 321b correspond to the second sub-pixel open region 212
Even distribution, then the spacing distance of two neighboring second through-hole 321b in the X direction is equal to its spacing distance in the Y direction, into
One step improves display effect.
When X-direction and Y-direction are in array distribution to more than two third through-hole 321c along Fig. 2, third distance D3It can
Think the distance between two neighboring third through-hole 321c in the X direction, or two neighboring third through-hole in the Y direction
The distance between 321c.Preferably, more than two third through-hole 321c correspond to third sub-pixel open region 213 and uniformly divide
Cloth, then the spacing distance of two neighboring third through-hole 321c in the X direction is equal to its spacing distance in the Y direction, further
Improve display effect.
In order to guarantee the homogeneity of diffracting effect between each sub-pixel, the long side a of the projection of through-hole 321 between each sub-pixel
And/or broadside b is parallel.Further, the long side a that through-hole 321 projects between each sub-pixel is parallel with broadside b.As shown in Fig. 2,
First long side a1, the second long side a2With third long side a3It is parallel to each other between any two, the first broadside b1, the second broadside b2It is wide with third
Side b3It is parallel to each other between any two.
Bad in order to further improve polarisation, in some alternative embodiments, the first cathode layer 310 is in a first direction
Thickness be less than or equal to the thickness of the second cathode layer 320 in a first direction.The thickness of first cathode layer 310 is smaller, can
Further improve the colour cast defect of display panel.
The thickness of first cathode layer 310 is it is not limited here, it is preferred that the first cathode layer 310 with a thickness of 4nm~9nm.
It enables the thickness of the first cathode layer 310 within the scope of reasonable, prevents the thickness of the first cathode layer 310 too small, cause by the
It is uneven that two cathode layers 320 can not make up picture transition, while preventing the thickness of the first cathode layer 310 is excessive from causing colour cast defect tight
Weight.
The thickness of second cathode layer 320 is it is not limited here, it is preferred that the second cathode layer 320 with a thickness of 6nm~
16nm.It enables the thickness of the second cathode layer 320 within the scope of reasonable, prevents the thickness of the second cathode layer 320 is too small can not be very
The problem of good improvement picture transition unevenness, while preventing that the thickness of the second cathode layer 320 is excessive to cause waste of material, avoid thickness
Spending greatly leads to that colour cast defect can not be made up by through-hole 321.
Further, in order to guarantee display effect, the overall thickness of cathode layer 300 in a first direction is 10nm~25nm.
Second embodiment of the invention also provides a kind of display device, the display panel including any of the above-described embodiment.
Third embodiment of the invention also provides a kind of manufacturing method of display panel, comprising:
Step S1: anode layer is formed.
There are many modes for forming anode layer 100, such as forms anode layer using modes such as whole face vapor depositions on substrate.
Step S2: luminescent layer is formed on the anode layer.
There are many modes for forming luminescent layer 200, and can be formed on anode layer 100 before forming luminescent layer 200
Other necessary layer structures, then are deposited to form luminescent layer 200 again.Luminescent layer 200 has open region 210, and in open region 210
Vapor deposition forms multiple sub-pixels.
Step S3: the first cathode layer is formed on the light-emitting layer.
In side of the luminescent layer 200 far from metal layer, it is deposited to form the first cathode layer 310 using the materials whole face such as metal.
Microcavity is formed between first cathode layer 310 and anode layer 100, plays the role of modulating optical wavelength.When the light of luminescent layer 200
When by the first cathode layer 310, since the first cathode layer 310 is relatively thin, the problem of colour cast unevenness can be improved.
Step S4: providing and places mask plate.
Mask plate is prepared according to the structure of the second cathode layer 320 in above-mentioned first embodiment display panel.Mask plate is set
Be placed in the first side of the cathode layer 310 far from luminescent layer 200, the opening of mask plate correspond to luminescent layer 200 non-open region and
Outs open area 210.
Step S5: vapor deposition forms the second cathode layer.
The diffraction zone that has corresponding to open region 210, diffraction zone are deposited on the second cathode layer 320 to be formed using mask plate
It is interior to form multiple through-holes 321, monochromatic light intensity spatially can be carried out diffraction dispersion when light is by diffraction zone
And improve the problem of colour cast unevenness.It, can be fine and since the part that the first cathode layer 310 is superimposed the second cathode layer 320 is thicker
Improvement picture transition unevenness problem.
The present invention can realize in other specific forms, without departing from its inventive concept and substantive characteristics.For example, specific
Algorithm described in embodiment can be modified, and system architecture is without departing from basic conception of the invention.Therefore, when
Preceding embodiment is all counted as being exemplary rather than in all respects limited, and the scope of the present invention is by appended claims
Rather than foregoing description defines, also, falls into the meaning of claim and whole changes in the range of equivalent to all be wrapped
It includes within the scope of the invention.
Claims (10)
1. a kind of display panel, which is characterized in that including several sub-pixels, each sub-pixel includes: along first direction
Anode layer, luminescent layer and the cathode layer being cascading；
The cathode layer includes the first cathode layer and the second cathode layer being stacked along the first direction, wherein described second
Cathode layer includes several through-holes.
2. display panel according to claim 1, which is characterized in that first cathode layer is located at second cathode layer
Close to the side of the luminescent layer.
3. display panel according to claim 1, which is characterized in that in each sub-pixel, the number of the through-hole
Amount is two or more, and more than two through-holes are in any one of linear, annular or array equidistantly distributed.
4. display panel according to claim 1, which is characterized in that the through-hole is along the first direction described first
Projection on cathode layer is in rectangle, and the long side a of through-hole projection elongation moulding in a second direction, the width of the through-hole projection
Side b is along third direction elongation moulding；
Wherein, the second direction and the third direction intersect with the first direction, and in each sub-pixel,
Several described through-holes are distributed along the second direction and/or the third direction；
Preferably, in each sub-pixel, the quantity of the through-hole is two, and two through-holes are in linear equidistantly distributed；
Or the quantity of the through-hole is three, three through-holes equidistantly distributed in a ring；Alternatively, the quantity of the through-hole is four
More than a, more than four through-holes are in array equidistantly distributed.
5. display panel according to claim 4, which is characterized in that the long side a and broadside b meets with ShiShimonoseki
System:
Wherein, N1、N2、N3Be positive integer, λ is the wavelength for the light that the sub-pixel issues, D be the two neighboring through-hole it
Between spacing.
6. display panel according to claim 5, which is characterized in that the through-hole is along the first direction described first
Projection on cathode layer is square, and the distance D is equal to the long side a.
7. display panel according to claim 4, which is characterized in that between each sub-pixel, the through-hole projection
The long side a and/or the broadside b are parallel.
8. display panel according to claim 1, which is characterized in that first cathode layer is in said first direction
Thickness is less than or equal to the thickness of second cathode layer in said first direction.
9. display panel according to claim 1, which is characterized in that first cathode layer with a thickness of 4nm~9nm；
And/or second cathode layer with a thickness of 6nm~16nm；And/or the total thickness of the cathode layer in said first direction
Degree is 10nm~25nm.
10. a kind of display device, which is characterized in that including the described in any item display panels of claim 1-9.
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