CN110444687A - Display panel and preparation method thereof - Google Patents
Display panel and preparation method thereof Download PDFInfo
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- CN110444687A CN110444687A CN201910749768.1A CN201910749768A CN110444687A CN 110444687 A CN110444687 A CN 110444687A CN 201910749768 A CN201910749768 A CN 201910749768A CN 110444687 A CN110444687 A CN 110444687A
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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
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The embodiment of the invention discloses a kind of display panels and preparation method thereof.The display panel includes that substrate includes the first pixel region, the second pixel region and third pixel region；First electrode layer is set on substrate；Luminous film layer is set in first electrode layer；The second electrode lay is set in luminous film layer；Organic film is set on the second electrode lay；Wherein, there is the protrusion of not exactly the same radian positioned at the luminous film layer or organic film of the first pixel region, the second pixel region and third pixel region.The present invention makes luminous film layer or organic film correspond to different pixels area with not exactly the same protrusion, the problem of increasing the recovery rate to light, improve the scattering degree of emergent light, reduce the total reflection of light, alleviate big visual angle colour cast caused by microcavity effect.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of display panel and preparation method thereof.
Background technique
OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) is used as a kind of current mode photophore
Part, because its had self-luminous, quick response, wide viewing angle and can be produced in flexible substrate the features such as due to are widely used in height
In performance display field.Currently, OLED device due between anode and cathode there are microcavity effect so that people angle of visibility with
Outer angle can find that image has phenomena such as ghost image and discoloration when watching screen, seriously affect viewing effect.
Summary of the invention
In a first aspect, the embodiment of the present invention provides a kind of display panel, which includes:
Substrate, including the first pixel region, the second pixel region and third pixel region；First electrode layer is set to the substrate
On；Shine film layer, is set in the first electrode layer；The second electrode lay is set in the luminous film layer；Organic film,
It is set on the second electrode lay；Wherein, positioned at the hair of first pixel region, the second pixel region and third pixel region
Light film layer or the organic film have the protrusion of not exactly the same radian.
In one embodiment, the protrusion include with first pixel region, the second pixel region and third pixel region one by one
Corresponding first protrusion, the second protrusion and third protrusion, one of them in first protrusion, the second protrusion and third protrusion
The height of the protrusion is less than the height of other protrusions.
In one embodiment, first protrusion, the second protrusion and third protrusion have not exactly the same contact angle.
In one embodiment, the contact angle includes corresponding with first protrusion, the second protrusion and third protrusion
The first contact angle, the second contact angle and third contact angle, in first contact angle, the second contact angle and third contact angle
One of them described contact angle is less than other described contact angles.
In one embodiment, the range of the contact angle is 0 to 40 degree.
It in one embodiment, further include the first film layer and the second film layer, first film layer is set to the first electrode
Between layer and the luminous film layer, second film layer is set between the second electrode lay and the luminous film layer.
Second aspect, the embodiment of the invention also provides a kind of preparation methods of display panel, this method comprises:
Substrate, including the first pixel region, the second pixel region and third pixel region are provided；
First electrode layer is prepared on the substrate；
The film layer that shines is prepared in the first electrode layer；
The second electrode lay is prepared in the luminous film layer；
Organic film is prepared on the second electrode lay；Wherein, it is located at first pixel region, the second pixel region and the
The luminous film layer of three pixel regions or the organic film have the protrusion of not exactly the same radian.
In one embodiment, the luminous film layer or the organic film are prepared using InkJet printing processes.
In one embodiment, the luminous film layer under different solvents system is by changing temperature, concentration, viscosity or solidification
Rate keeps the height for being located at the protrusion of first pixel region, the second pixel region and third pixel region not exactly the same.
In one embodiment, regulating and controlling temperature, concentration, viscosity, ink-jet time or solidification rate are located at the organic film
The height of the protrusion of first pixel region, the second pixel region and third pixel region is not exactly the same.
Technical solution of the present invention provides a kind of display panel and preparation method thereof, which includes the first pixel
Area, the second pixel region and third pixel region, further include first electrode layer；The film layer that shines is set in first electrode layer；It is set to
The second electrode lay in the film layer that shines；It is set to organic film on the second electrode lay；Wherein, it is located at the first pixel region, the second pixel
The luminous film layer or organic film of area and third pixel region have the protrusion of not exactly the same radian.Due to the protrusion of different radians
To the shooting angle and direction difference of light, the recovery rate to light is increased, the scattering degree of emergent light is improved, reduces light
The problem of being totally reflected, alleviating big visual angle colour cast caused by microcavity effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the display panel that one embodiment of the invention provides.
Fig. 2 be another embodiment of the present invention provides display panel structural schematic diagram.
Fig. 3 be another embodiment of the present invention provides display panel structural schematic diagram.
Fig. 4 be another embodiment of the present invention provides display panel structural schematic diagram.
Fig. 5 is the flow chart of display panel preparation method provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Due to, there are microcavity effect, can exist under big visual angle between the anode and cathode of OLED device brightness occur decaying with
Color offset phenomenon.
To solve the above-mentioned problems, the embodiment of the present invention provides a kind of display panel, is located at the first pixel region, the by making
The luminous film layer or organic film of two pixel regions and third pixel region have the protrusion of not exactly the same radian, and such protrusion can
So that difference occurs for the shooting angle and exit direction of light, increases the recovery rate to light, improve the scattering degree of emergent light, avoid
The total reflection of light, solves the problems, such as big visual angle colour cast caused by microcavity effect.
Fig. 1 is the structural schematic diagram for the display panel that one embodiment of the invention provides.Fig. 2 is that another embodiment of the present invention mentions
The structural schematic diagram of the display panel of confession.Referring to figs. 1 and 2, which includes substrate 1, first electrode 110, hair
Light film layer 120, second electrode 130 and organic film 140.
Substrate 1 includes the first pixel region 121, the second pixel region 122 and third pixel region 123, and first electrode layer 110 is arranged
In on substrate 1；The film layer 120 that shines is set in first electrode layer 110；The second electrode lay 130 is set in luminous film layer 120；
Organic film 140 is set on the second electrode lay 130；Wherein, it is located at the first pixel region 121, the second pixel region 122 and third picture
The luminous film layer 120 or organic film 140 in plain area 123 have the protrusion of not exactly the same radian.
Substrate 1 can be rigid substrate, such as glass substrate, be also possible to flexible base board, such as polyimides (PI) etc..
The film layer 120 that shines can be made of a kind of material, such as quantum dot light emitting material.The film layer 120 that shines can be by two kinds or two
Kind or more material composition, wherein at least include a kind of material of main part, and include at least a kind of dopant material.Material of main part packet
Carbazole compound or polymer containing aromatic substituent are included, aromatic substituent and luxuriant and rich with fragrance class compound or polymer are contained.
Dopant material includes the compound containing Ir element, the compound containing Pt element, the compound containing Cu (I) element, delay
Fluorescence class compound.First electrode 110 is anode, and second electrode 130 is cathode, 120 material of first electrode 110 and second electrode
Material is conductive oxide (such as zinc oxide of ITO, FTO, doping), sheet metal (such as Ag, Al, Mg or these types of metal
Alloy) or graphene.Organic film 140 can be light removing layer, and light removing layer is prepared using the biggish material of refractive index, this
Sample can effectively reduce total reflection, improve the recovery rate of light.
The technical solution of the present embodiment is corresponded by preparation and the first pixel region, the second pixel region and third pixel region
Luminous film layer or organic film have not exactly the same radian protrusion, increase the recovery rate to light, improve emergent light
Scattering degree, the problem of reducing the total reflection of light, alleviate big visual angle colour cast caused by microcavity effect.
In one embodiment, protrusion include with the first pixel region 121, the second pixel region 122 and third pixel region 123 one by one
Corresponding first protrusion D1, the second protrusion D2 and third protrusion D3, in the first protrusion D1, the second protrusion D2 and third protrusion D3
The height of one of protrusion is less than the height of other protrusions.With reference to Fig. 2, the height h1 of the first protrusion D1 is less than the second protrusion D2
Height h2 and third protrusion D3 height h3, and the height h2 of the second protrusion D2 be less than third protrusion D3 height h3.With reference to
The height h3 of the height h1 of Fig. 3, the first protrusion D1 the height h2 less than the second protrusion D2 and third protrusion D3, and the second protrusion D2
Height h2 be equal to third protrusion D3 height h3.As height h2 of the height h1 of the first protrusion D1 less than the second protrusion D2 and
The height h3 of three protrusion D3 can also make the height h2 of the second protrusion D2 be greater than the height h3 of third protrusion D3.The present invention is unlimited
In specific embodiment described here, height h1 of the height h2 less than the first protrusion D1 and of the second protrusion D2 can also be selected
The height h3 of three protrusion D3, the height h3 of height h1 and third protrusion D3 for the first protrusion D1 without limitation, the first protrusion
The height h3 of the height h1 and third protrusion D3 of D1 can be equal, can not also wait.Or the height h3 of third protrusion D3 is less than
The height h2 of the height h1 of first protrusion D1 and the second protrusion D2, the height of height h1 and the second protrusion D2 for the first protrusion D1
Spend h2 without limitation, the height h2 of the height h1 of the first protrusion D1 and the second protrusion D2 can be equal, can not also wait.The present invention
The not exactly the same emergent light for alloing luminous film layer in protrusion emits along different directions, and reduces total reflection, increases the outgoing of light
Rate reduces big visual angle colour cast caused by microcavity effect.
In one embodiment, the first protrusion D1, the second protrusion D2 and third protrusion D3 have not exactly the same contact angle.
With reference to Fig. 1 and Fig. 3, when the film layer (anode 110 of the surface contact of the close substrate 1 of shine film layer 120 or organic film 140
Upper surface 11 or cathode 130 upper surface 12) when being entire plane, the protrusion of shine film layer 120 or organic film 140 and flat
At the interface point of face, the angle of cambered boss surface tangent line and interplanar is known as contact angle.With reference to Fig. 4, pixel confining layer 150
With groove, light compensation layer 160 covers pixel confining layer 150, when the close substrate 1 of luminous film layer 120 or organic film 140
One surface contact light compensation layer 160 when, shine film layer 120 fill up groove and overflow, shine film layer 120 boss surface with it is recessed
Plane 13 when slot fills up and reaches spilling intersects, the boss surface shape of the tangent line of the contact point of intersection and luminous film layer 120
At angle be known as contact angle.
In one embodiment, contact angle includes one-to-one with the first protrusion D1, the second protrusion D2 and third protrusion D3
In first contact angle α, the second contact angle β and third contact angle γ, the first contact angle α, the second contact angle β and third contact angle γ
One of contact angle be less than other contact angles.With reference to Fig. 3, the first contact angle α is less than the second contact angle β and third contact angle
γ and the second contact angle β are equal to third contact angle γ.It is contacted with reference to Fig. 4, the first contact angle α less than the second contact angle β and third
Angle γ and the second contact angle β are less than third contact angle γ.It can also be contacted with the first contact angle α less than the second contact angle β and third
Angle γ and the second contact angle β are greater than third contact angle γ.The invention is not limited to the specific embodiments described herein, can also select
Second contact angle β does not limit the first contact angle α and third contact angle γ less than the first contact angle α and third contact angle γ
It is fixed.Or third contact angle γ is less than the first contact angle α and the second contact angle β, for the first contact angle α and the second contact angle β
Without limitation.For example, the first protrusion D1 glows, the second protrusion D2 green light and when the D3 blue light-emitting of third protrusion, first
When contact angle α is less than the second contact angle β and third contact angle γ, thus it is possible to vary big visual angle is partially red；Second contact angle β is less than first
When contact angle α and third contact angle γ, thus it is possible to vary big visual angle is partially green；Third contact angle γ is less than the first contact angle α and second
When contact angle β, thus it is possible to vary big visual angle is partially blue.
The technical solution of the present embodiment, by corresponding to form not exactly the same contact angle, In from different protrusions
The exit direction for expanding light in varying degrees improves the dependence that OLED device light takes out angle, slows down brightness under big visual angle and decline
Subtract and colour cast.
In one embodiment, the range of contact angle is spent for 0 to 40, and preferably 5 degree to 30 degree.Specifically, contact angle can
Think 8 degree, 15 degree, 24 degree, 28 degree or 34 degree etc..At least one of contact angle of the present embodiment is not 0 degree, other contact angles
It is selected according to actual needs.
It in one embodiment, further include the first film layer and the second film layer, the first film layer is set to first electrode layer and shines
Between film layer, the second film layer is set between the second electrode lay and luminous film layer.With reference to Fig. 3 and Fig. 4, the first film layer includes pixel
One layer in confining layers 150, hole injection layer (not shown), hole transmission layer (not shown) and light compensation layer 160
Or multilayer, wherein light compensation layer 160 is arranged between luminous film layer 120 and first electrode 110.Since light compensation layer 160 reflects
Rate is lower than the refractive index for the film layer that shines, and light can be reflected repeatedly, so that light efficiency increases, and then microcavity effect increases.Second
Film layer includes one or more layers in hole blocking layer 170, electron transfer layer 180 and electron injecting layer (not shown).It is empty
The film layers such as cave implanted layer, light compensation layer, hole blocking layer have different materials and different thickness, they can be directed to different
Microcavity environment is regulated and controled, and the exitance of light is further increased, and is reduced big visual angle colour cast caused by microcavity effect, is improved big visual angle
Lower brightness decay and colour cast.
The embodiment of the present invention provides a kind of production method of display panel, and Fig. 5 is display surface provided in an embodiment of the present invention
The flow chart of plate preparation method.This method includes
Step 200: substrate, including the first pixel region, the second pixel region and third pixel region are provided；
Step 210: first electrode layer is prepared on substrate；
Step 220: the film layer that shines is prepared in first electrode layer；
Step 230: preparing the second electrode lay in film layer shining；
Step 240: preparing organic film on the second electrode layer；Wherein, it is located at the first pixel region, the second pixel region and the
The luminous film layer or organic film of three pixel regions have the protrusion of not exactly the same radian.
In one embodiment, the film layer that shines or organic film are prepared using InkJet printing processes.
In one embodiment, the luminous film layer under different solvents system is by changing temperature, concentration, viscosity or solidification rate
Keep the height for being located at the protrusion of the first pixel region, the second pixel region and third pixel region not exactly the same.For example, general feelings
Luminous film layer under condition under different solvents system refer to the first pixel region be feux rouges dicyandiamide solution luminous film layer,
The luminous film layer of the green light dicyandiamide solution of two pixel regions, in the luminous film layer of the blue light dicyandiamide solution of third pixel region.It is executing
When step 220, regulate and control the concentration of the luminous film layer of three kinds of different solvents systems of red, green, blue, using the technology controlling and process of inkjet printing
The height of the protrusion of the luminous film layer of red, green, blue.When the partially red situation in the big visual angle of display screen to be solved, feux rouges body can control
It is the height that the height of the protrusion of luminous film layer is less than the protrusion of the luminous film layer of blue light system and the luminous film layer of green light system, blue light
The height of the protrusion of the luminous film layer of system and the luminous film layer of green light system can be equal, can not also wait, but for blue light system
The height of the protrusion of the film layer that shines and the luminous film layer of green light system is without limitation.When the partially green situation in the big visual angle of display screen to be solved
When, the height that can control the protrusion of the luminous film layer of green light system is less than the luminous film layer of blue light system and the luminous film layer of feux rouges system
Protrusion height, but for blue light system shine film layer and feux rouges system shine film layer protrusion height without limitation.When
When solving the partially blue situation in the big visual angle of display screen, it can control the shine height of protrusion of film layer of blue light system and be less than feux rouges body
It is the height of the protrusion of luminous film layer and the luminous film layer of green light system, but film layer luminous for green light system and feux rouges system shine
The height of the protrusion of film layer is without limitation.Complete above step after, the luminous film layer prepared is solidified, make liquid or
The luminous film layer of sol form becomes solid luminous film layer, meets needs of production.Regulate and control the height for the film layer protrusion that shines also
It can not limited this using modes, the present embodiment such as regulating and controlling temperature, viscosity, solidification rates.
In one embodiment, regulating and controlling temperature, concentration, viscosity, ink-jet time or solidification rate make organic film be located at first
The height of the protrusion of pixel region, the second pixel region and third pixel region is not exactly the same.The organic film of the present embodiment can be
Light removing layer, light removing layer can be effectively reduced total reflection in this way, be improved the extraction of light using the biggish material preparation of refractive index
Rate.When executing step 220, a whole face is normally deposited into the film layer that shines, without difference in height.When executing step 240, using spray
The mode of ink printing controls organic film in the not exactly the same height of formation of the first pixel region, the second pixel region and third pixel region
The protrusion of degree.When using same material with organic film, by controlling in the first pixel region, the second pixel region and third pixel
The ink-jet time in area makes the height of the protrusion of the organic film of the first pixel region having less than the second pixel region and third pixel region
The height of the protrusion of the organic film of the height of the protrusion of machine film layer, the second pixel region and third pixel region can be equal, can also
To differ, for the organic film of the second pixel region and third pixel region protrusion height without limitation.It can also make second
The height of the protrusion of the organic film of pixel region less than the protrusion of the first pixel region and the organic film of third pixel region height,
The height of the protrusion of the organic film of first pixel region and third pixel region can be equal, can not also wait, for the first pixel
The height of the protrusion of the organic film of area and third pixel region is without limitation.It can also make the convex of the organic film of third pixel region
Height of the height in portion less than the protrusion of the first pixel region and the organic film of the second pixel region, the first pixel region and the second pixel
The height of the protrusion of the organic film in area can be equal, can not also wait, for the organic of the first pixel region and the second pixel region
The height of the protrusion of film layer is without limitation.The height for regulating and controlling organic film protrusion can also use temperature, viscosity, solidification rate etc.
Mode, the present embodiment do not limit this.Organic film can be prepared using intimate different materials, for organic film
Material without limitation.
The production method of display panel provided in an embodiment of the present invention, by controlling luminous film layer and organic film in ink-jet
The factors such as time, solidification rate in print procedure, the protrusion for forming not exactly the same radian can expand in various degree light
Exit direction, improve OLED device light take out dependence of angle, slow down brightness decay and colour cast under big visual angle.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts, be combined with each other and substitutes without departing from protection scope of the present invention.Therefore, although by above embodiments to this
Invention is described in further detail, but the present invention is not limited to the above embodiments only, is not departing from present inventive concept
In the case of, it can also include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of display panel characterized by comprising
Substrate, including the first pixel region, the second pixel region and third pixel region；
First electrode layer is set on the substrate；
Shine film layer, is set in the first electrode layer；
The second electrode lay is set in the luminous film layer；
Organic film is set on the second electrode lay；Wherein, it is located at first pixel region, the second pixel region and third
The luminous film layer of pixel region or the organic film have the protrusion of not exactly the same radian.
2. display panel as described in claim 1, which is characterized in that the protrusion includes and first pixel region, second
Pixel region and one-to-one first protrusion of third pixel region, the second protrusion and third protrusion, first protrusion, the second protrusion
It is less than the height of other protrusions with the height of one of them protrusion in third protrusion.
3. display panel as claimed in claim 2, which is characterized in that first protrusion, the second protrusion and third protrusion tool
There is not exactly the same contact angle.
4. display panel as claimed in claim 3, which is characterized in that the contact angle includes and first protrusion, second
One-to-one first contact angle in protrusion and third protrusion, the second contact angle and third contact angle, first contact angle, second
One of them contact angle in contact angle and third contact angle is less than other described contact angles.
5. display panel as described in claim 3 or 4, which is characterized in that the range of the contact angle is 0 to 40 degree.
6. display panel as described in claim 1, which is characterized in that it further include the first film layer and the second film layer, described first
Film layer is set between the first electrode layer and the luminous film layer, second film layer be set to the second electrode lay and
Between the luminous film layer.
7. a kind of preparation method of display panel characterized by comprising
Substrate, including the first pixel region, the second pixel region and third pixel region are provided；
First electrode layer is prepared on the substrate；
The film layer that shines is prepared in the first electrode layer；
The second electrode lay is prepared in the luminous film layer；
Organic film is prepared on the second electrode lay；Wherein, it is located at first pixel region, the second pixel region and third picture
The luminous film layer in plain area or the organic film have the protrusion of not exactly the same radian.
8. the preparation method of display panel as claimed in claim 7, which is characterized in that the luminous film layer or the organic film
It is prepared using InkJet printing processes.
9. the preparation method of display panel as claimed in claim 7, which is characterized in that the luminescent film under different solvents system
Layer makes to be located at first pixel region, the second pixel region and third pixel region by changing temperature, concentration, viscosity or solidification rate
The protrusion height it is not exactly the same.
10. the preparation method of display panel as claimed in claim 7, which is characterized in that when regulating and controlling temperature, concentration, viscosity, ink-jet
Between or solidification rate so that the organic film is located at the protrusion of first pixel region, the second pixel region and third pixel region
Height it is not exactly the same.
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Application publication date: 20191112 |