CN108987608B - OLED display panel, manufacturing method thereof and display device - Google Patents

OLED display panel, manufacturing method thereof and display device Download PDF

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Publication number
CN108987608B
CN108987608B CN201810821373.3A CN201810821373A CN108987608B CN 108987608 B CN108987608 B CN 108987608B CN 201810821373 A CN201810821373 A CN 201810821373A CN 108987608 B CN108987608 B CN 108987608B
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Prior art keywords
display panel
oled display
layer
support columns
target
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CN108987608A (en
Inventor
李云泽
杨妮
李少茹
齐智坚
许亨艺
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
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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
    • H10K50/87—Arrangements for heating or cooling
    • 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
    • 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
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
    • 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 application discloses an OLED display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. The OLED display panel includes: backplate and apron of relative setting, the apron includes: the heat conduction layer is arranged on the first substrate base plate and faces one side of the back plate; the back plate includes: the second substrate base plate, set up towards a plurality of target support posts and a plurality of anode blocks of apron one side on the second substrate base plate, the light-emitting block of setting on the anode block to and set up the negative pole pattern on a plurality of target support posts and light-emitting block, the part that lies in the target support post in the negative pole pattern is contacted with the heat conduction layer. The OLED display panel can be prevented from being overheated, and the OLED display panel is used for the OLED display panel.

Description

OLED display panel, manufacturing method thereof and display device
Technical Field
The application relates to the technical field of display, in particular to an OLED display panel, a manufacturing method thereof and a display device.
Background
With the development of display technology, Organic Light-Emitting Diode (OLED) display devices have been widely used due to their good display effect.
An OLED display panel in an OLED display device generally includes: the back plate and the cover plate are oppositely arranged. The back plate includes: the light emitting device includes a base substrate, a plurality of anode blocks disposed on the base substrate, a light emitting block disposed on each of the anode blocks, and a cathode pattern covering all the light emitting blocks. The OLED display device may apply a cathode voltage to the cathode pattern and an anode voltage to each anode block when displaying an image, so that the light emitting block in each pixel unit emits light by the cathode voltage and the anode voltage.
However, since the light-emitting blocks in the OLED display panel are prone to generate heat when emitting light, and the light-emitting blocks are difficult to dissipate heat, the OLED display panel is prone to overheat.
Disclosure of Invention
The application provides an OLED display panel, a manufacturing method thereof and a display device, which can avoid the condition that the OLED display panel is overheated, and the technical scheme is as follows:
in one aspect, an OLED display panel is provided, including: the back plate and the cover plate are oppositely arranged,
the cover plate includes: the heat conduction layer is arranged on the first substrate base plate and faces one side of the back plate;
the back plate includes: the light-emitting device comprises a second substrate base plate, a plurality of target support columns and a plurality of anode blocks, wherein the target support columns and the anode blocks are arranged on the second substrate base plate and face one side of a cover plate, the light-emitting blocks are arranged on the anode blocks, and cathode patterns are arranged on the target support columns and the light-emitting blocks, and the parts, located on the target support columns, of the cathode patterns are in contact with the heat-conducting layer.
Optionally, the material of heat-conducting layer is electrically conductive material, OLED display panel still includes: a control unit for controlling the operation of the display unit,
the control unit is connected with the heat conduction layer and used for applying a regulating voltage to the heat conduction layer so as to adjust the voltage on the cathode pattern.
Optionally, the back plate further includes:
a pixel circuit layer disposed on the second substrate;
a pixel defining layer disposed on the pixel circuit layer and defining a plurality of pixel regions;
wherein, each pixel region on the pixel circuit layer is provided with one anode block, and the target support columns are arranged on the pixel definition layer.
Optionally, the heat conducting layer is transparent, and the light emitting block is configured to emit light in a direction away from the second substrate;
or the heat conduction layer is in a non-transparent state, and the light-emitting block is used for emitting light towards the direction close to the second substrate base plate.
Optionally, the plurality of pixel regions are arranged in an array, the plurality of target support columns arranged on the pixel defining layer are arranged in an array, a row of pixel regions exists between any two adjacent rows of target support columns, and two columns of pixel regions exist between any two adjacent columns of target support columns.
Optionally, the back plate further includes:
at least one auxiliary support post disposed on the pixel defining layer, and the auxiliary support post is in contact with the thermally conductive layer.
Optionally, the material of the target supporting column is the same as that of the auxiliary supporting column.
In another aspect, a method for manufacturing an OLED display panel is provided, where the OLED display panel is the above OLED display panel, and the method includes:
forming a heat conduction layer on the first substrate base plate to obtain a cover plate;
forming a plurality of target support columns and a plurality of anode blocks on a second substrate base plate;
forming a light emitting block on the anode block;
forming a cathode pattern on the plurality of target support pillars and the light emitting blocks to obtain a back plate;
the cover plate and the backing plate are oppositely disposed such that portions of the cathode pattern on the target support posts are in contact with the thermal conductive layer.
Optionally, the heat conducting layer is made of an electrically conductive material, and the method further includes:
connecting a control unit with the heat conducting layer;
wherein the control unit is configured to apply a regulated voltage to the anode thermally conductive layer to adjust a voltage across the cathode pattern.
In still another aspect, a display device is provided, which includes: the OLED display panel is provided.
In the OLED display panel provided by the application, the target support columns are arranged in the back plate, and the cathode patterns cover the target support columns and are in contact with the heat conduction layer in the cover plate under the supporting action of the target support columns. Because the heat conduction effect of heat-conducting layer is better, and the heat-conducting layer contacts with the cathode pattern, consequently, the heat that produces when the light-emitting block is luminous can carry out the heat conduction through cathode pattern and heat-conducting layer to can avoid OLED display panel overheated condition to appear.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention;
FIG. 2 is a top view of a partial structure of the OLED display panel shown in FIG. 1 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
FIG. 4 is a top view of a partial structure of the OLED display panel shown in FIG. 3 according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for manufacturing an OLED display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating another method for fabricating an OLED display panel according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a manufacturing process of an OLED display panel according to an embodiment of the present invention;
FIG. 8 is a schematic view illustrating a manufacturing process of another OLED display panel according to an embodiment of the present invention;
FIG. 9 is a schematic view illustrating a manufacturing process of another OLED display panel according to an embodiment of the present invention;
FIG. 10 is a schematic view illustrating a manufacturing process of another OLED display panel according to an embodiment of the present invention;
fig. 11 is a schematic view illustrating a manufacturing process of an OLED display panel according to another embodiment of the present invention;
FIG. 12 is a schematic view of another OLED display panel according to another embodiment of the present invention;
fig. 13 is a schematic view illustrating a manufacturing process of another OLED display panel according to another embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The OLED display panel is applied more, but because the light-emitting block in the OLED display panel generates heat more easily when emitting light, and because the pixel definition layer around the light-emitting block is usually an organic material with poor thermal conductivity, the light-emitting block is difficult to dissipate heat, which easily causes the overheat of the OLED display panel.
In addition, the OLED display panel in the OLED display device may further include: and a control unit connected with each of the light emitting blocks and the cathode pattern. When the OLED display device displays an image, the control unit may apply a cathode voltage to the cathode pattern and an anode voltage to each anode block, so that the light emitting block in each pixel unit emits light by the cathode voltage and the anode voltage. However, since the cathode pattern has a large resistance, a deviation occurs in the cathode voltage applied to the portions of the cathode pattern covering the respective light emitting layers, thereby affecting the normal display of the OLED display device.
Embodiments of the present invention provide an OLED display panel that can reduce a deviation of voltages applied to portions of cathode patterns that cover respective light emitting layers, and prevent the OLED display panel from overheating.
Fig. 1 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention, and as shown in fig. 1, an OLED display panel 0 may include: a cover plate and a back plate (not shown in fig. 1) disposed opposite each other.
The cover plate includes: a first substrate board 011, and a heat conductive layer 012 provided on the first substrate board 011 and facing one side of the rear plate;
the back plate includes: a second substrate 021, a plurality of target support columns 022 and a plurality of anode blocks 023 disposed on the second substrate 021 toward a side of the cover plate, a light emitting block 024 disposed on the anode block 023, and a cathode pattern 025 disposed on the plurality of target support columns 022 and the light emitting block 024, a portion of the cathode pattern 025 located on the target support columns 022 being in contact with the heat conductive layer 012 in the cover plate. It should be noted that only one anode block 023, one light-emitting block 024, and one target support post 022 are shown in fig. 1.
In summary, in the OLED display panel provided in the embodiments of the present invention, the target supporting pillars are disposed in the back plate, and the cathode pattern covers the target supporting pillars and contacts the heat conducting layer in the cover plate under the supporting action of the target supporting pillars. Because the heat conduction effect of heat-conducting layer is better, and the heat-conducting layer contacts with the cathode pattern, consequently, the heat that produces when the light-emitting block is luminous can carry out the heat conduction through cathode pattern and heat-conducting layer to can avoid OLED display panel overheated condition to appear.
Optionally, the heat conductive layer 012 may be made of an electrically conductive material. The OLED display panel may further include a control unit (not shown in fig. 1), which may be connected to the heat conductive layer 012 for applying a regulation voltage to the heat conductive layer 012 to adjust a voltage on the cathode pattern 025, thereby adjusting a voltage of a portion of the cathode pattern 025 in contact with the heat conductive layer 012 to a voltage in the heat conductive layer 012. Further, since the heat conductive layer 012 is made of an entire layer of an electrically conductive material, the resistance of the heat conductive layer 012 is small, and voltage variation at each position in the heat conductive layer 012 is small, so that voltage variation applied to a portion of the cathode pattern 025 covering each light-emitting block 024 can be reduced, and the display effect of the OLED display panel can be improved.
Optionally, the control unit may be further connected to both the anode block 023 and the cathode pattern 025 for applying an anode voltage to the anode block 023 and a cathode voltage to the cathode pattern 025.
Optionally, the control unit may be disposed on the back plate, a frame sealing adhesive Y may be disposed between the back plate and the cover plate, and the control unit may be connected to the heat conducting layer 012 on the cover plate through conducting ions or metal balls in the frame sealing adhesive.
With continued reference to fig. 1, the back plate may further include: a pixel circuit layer 026 disposed on the second substrate 021; a pixel defining layer 027 disposed on the pixel circuit layer 026 and defining a plurality of pixel regions a; wherein, each pixel area a on the pixel circuit layer 027 is provided with one anode block 023, the plurality of target supporting columns 022 are all disposed on the pixel defining layer 027, the pixel circuit layer 027 may include a plurality of pixel circuits, and each pixel circuit is connected with one anode block, and the control unit may be connected with the anode block through the pixel circuit and apply the anode voltage to the anode block.
Optionally, the heat conducting layer 012 may be transparent (for example, the heat conducting layer 012 is made of Cu, Al, or other metal with good electrical and thermal conductivity), and at this time, the light emitting block 024 may be configured to emit light in a direction away from the second substrate 021, and at this time, the OLED display panel 0 may be a top emission display panel. Alternatively, the heat conducting layer 012 can be non-transparent, and the light emitting block 024 can be used for emitting light in a direction close to the second substrate 021, in which case the OLED display panel 0 can be a bottom emission type display panel. That is, the OLED display panel provided in the embodiment of the present invention may be used for a top emission type display panel, and may also be used for a bottom emission type display panel.
Alternatively, fig. 2 is a partial structural top view of the OLED display panel in fig. 1 according to an embodiment of the present invention, as shown in fig. 2, a plurality of pixel regions a defined by a pixel defining layer 027 may be arranged in an array, and a plurality of target support pillars 022 disposed on the pixel defining layer 027 may also be arranged in an array. And a row of pixel regions a exists between any two adjacent rows of target support columns 022, and two columns of pixel regions a exist between any two adjacent columns of target support columns 022.
Optionally, fig. 3 is a schematic structural diagram of another OLED display panel provided in an embodiment of the present invention, as shown in fig. 3, on the basis of fig. 1, the backplane may further include: at least one auxiliary support post 028 provided on the pixel defining layer 027, and the auxiliary support post 028 can be in contact with the heat conductive layer 012 in the cover sheet. That is, in the OLED display panel shown in fig. 3, the cover plate and the back plate may be supported by the target support columns 022 and the auxiliary support columns 028 together, so that the stability of the OLED display panel can be improved.
Alternatively, the material of the target support posts 022 may be the same as that of the auxiliary support posts 028, and thus, the target support posts 022 and the auxiliary support posts 028 may be formed on the pixel defining layer 027 at the same time. For example, the target support posts 022 and the auxiliary support posts 028 may be formed on the pixel defining layer 027 by a spin coating method or an inkjet printing method.
Further, fig. 4 is a partial structure top view of the OLED display panel in fig. 3 according to an embodiment of the invention, as shown in fig. 4, a plurality of pixel regions a may be arranged in an array, a plurality of target support columns 022 arranged on the pixel defining layer 027 are arranged in an array, and a plurality of auxiliary support columns 028 arranged in an array may be arranged on the pixel defining layer 027. A row of pixel regions a exist between any two adjacent rows of target support columns 022, two rows of pixel regions a exist between any two adjacent rows of target support columns 022, a row of pixel regions a exist between any two adjacent rows of auxiliary support columns 028, and the auxiliary support columns 028 and the target support columns 022 are arranged at intervals in the row arrangement direction X.
The OLED display panel may be an active matrix driven OLED display panel or a passive matrix driven OLED display panel, which is not limited in the embodiment of the present invention.
In summary, in the OLED display panel provided in the embodiments of the present invention, the target supporting pillars are disposed in the back plate, and the cathode pattern covers the target supporting pillars and contacts the heat conducting layer in the cover plate under the supporting action of the target supporting pillars. Because the heat conduction effect of heat-conducting layer is better, and the heat-conducting layer contacts with the cathode pattern, consequently, the heat that produces when the light-emitting block is luminous can carry out the heat conduction through cathode pattern and heat-conducting layer to can avoid OLED display panel overheated condition to appear.
Fig. 5 is a flowchart of a method for manufacturing an OLED display panel according to an embodiment of the present invention, where the OLED display panel may be the OLED display panel shown in fig. 1 or fig. 3, and as shown in fig. 5, the method for manufacturing the OLED display panel may include:
step 501, forming a heat conduction layer on the first substrate base plate to obtain a cover plate.
Step 502, forming a plurality of target support posts and a plurality of anode blocks on a second substrate base plate.
Step 503, forming a light emitting block on the anode block.
Step 504, forming a cathode pattern on the plurality of target support pillars and the light-emitting blocks to obtain the back plate.
Step 505, the cover plate and the back plate are oppositely arranged, so that the part of the cathode pattern, which is positioned on the target support column, is in contact with the heat conducting layer.
In summary, in the OLED display panel manufactured by the method provided in the embodiments of the invention, the target supporting pillars are disposed in the back plate, and the cathode pattern covers the target supporting pillars and contacts the heat conducting layer in the cover plate under the supporting action of the target supporting pillars. Because the heat conduction effect of heat-conducting layer is better, and the heat-conducting layer contacts with the cathode pattern, consequently, the heat that produces when the light-emitting block is luminous can carry out the heat conduction through cathode pattern and heat-conducting layer to can avoid OLED display panel overheated condition to appear.
Fig. 6 is a flowchart of another method for manufacturing an OLED display panel according to an embodiment of the present invention, where the OLED display panel may be the OLED display panel shown in fig. 1, and as shown in fig. 6, the method for manufacturing the OLED display panel may include:
step 601, forming a heat conduction layer on the first substrate base plate to obtain the cover plate.
As shown in fig. 7, in step 601, a heat conductive layer 012 may be formed on the first substrate 011 by sputtering, vapor deposition, printing, or the like, and the heat conductive layer 012 may be made of an electrically conductive material, such as copper, aluminum, or indium tin oxide.
Step 602, a pixel circuit layer is formed on a second substrate.
As shown in fig. 8, a pixel circuit layer 026 may be formed on the second substrate 021 using a multiple patterning process in step 602, the pixel circuit layer 026 may include a pixel circuit to be connected to each anode, and each pixel circuit may include a plurality of thin film transistors and at least one capacitor.
Step 603, forming a pixel defining layer for defining a plurality of pixel regions on the pixel circuit layer.
As shown in fig. 9, a pixel defining layer 027 may be formed on the already formed pixel circuit layer 026 in step 603. In forming the pixel defining layer 027, a pixel defining material layer may be first formed on the pixel circuit layer 026, and then processed using a single patterning process to obtain a pixel defining layer defining the pixel region a.
Step 604 forms an anode block in each pixel area on the pixel circuit layer.
As shown in fig. 10, after the pixel defining layer 027 is formed, a plurality of pixel regions can be determined, and then, one anode block 023 can be formed in each pixel region a, and each anode block 023 can be connected to one pixel circuit in the pixel circuit layer 026.
Step 605, forming a light emitting block on the anode block.
As shown in fig. 11, after a plurality of anode blocks 023 are formed, one light-emitting block 024 may be formed on each anode block 023, a material of each light-emitting block 024 may be an electro-luminescent material, and one light-emitting block 024 is used to emit light of one color (e.g., red, green, blue, or white light).
Step 606 forms a plurality of target support posts on the pixel defining layer.
As shown in fig. 12, after the pixel defining layer is formed, a plurality of target supporting columns 022 may be formed on the pixel defining layer 027, for example, by spin coating or inkjet printing.
When the method is used to manufacture the OLED display panel shown in fig. 3, at least one auxiliary support post is also required to be formed on the pixel defining layer in step 606. The auxiliary support posts may be the same material as the target support posts.
Step 607, forming a cathode pattern on the plurality of target support pillars and the light emitting blocks to obtain the back sheet.
As shown in fig. 13, after the target support columns and the light emitting blocks are formed, a cathode pattern 025 may be covered on the target support columns 027 and the light emitting blocks 024 using a patterning process.
Step 608, the cover plate and the back plate are oppositely arranged so that the portion of the cathode pattern located on the target support posts is in contact with the heat conducting layer.
As shown in fig. 1, after the cover plate and the back plate are obtained, the cover plate and the back plate may be disposed opposite to each other, so that the portions of the cathode patterns 025 located on the target support columns 022 are in contact with the heat conductive layer 012, and a sealant Y may also be formed between the cover plate and the back plate.
When the method is used to manufacture the OLED display panel shown in fig. 3, the auxiliary support columns are also in contact with the heat conductive layer after the cover plate and the back plate are oppositely disposed.
And step 609, connecting the control unit with the heat conduction layer.
The control unit is used for applying a regulating voltage to the heat-conducting layer so as to adjust the voltage on the cathode pattern.
Optionally, when the control unit may further apply an anode voltage to the anode block and a cathode voltage to the cathode pattern, the control unit may also be connected to the anode block and the cathode pattern in step 609.
In summary, in the OLED display panel manufactured by the method provided in the embodiments of the invention, the target supporting pillars are disposed in the back plate, and the cathode pattern covers the target supporting pillars and contacts the heat conducting layer in the cover plate under the supporting action of the target supporting pillars. Because the heat conduction effect of heat-conducting layer is better, and the heat-conducting layer contacts with the cathode pattern, consequently, the heat that produces when the light-emitting block is luminous can carry out the heat conduction through cathode pattern and heat-conducting layer to can avoid OLED display panel overheated condition to appear.
An embodiment of the present invention provides a display device, which may include: the OLED display panel shown in fig. 1 or 3. The display device may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
It should be noted that, the method embodiment provided by the embodiment of the present invention can be mutually referred to with the corresponding display panel embodiment, and the embodiment of the present invention does not limit this. The sequence of the steps of the method embodiments provided by the embodiments of the present invention can be appropriately adjusted, and the steps can be correspondingly increased or decreased according to the situation, and any method that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention shall be covered by the protection scope of the present invention, and therefore, the detailed description thereof shall not be repeated.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. An OLED display panel, comprising: the back plate and the cover plate are oppositely arranged,
the cover plate includes: the heat conduction layer is arranged on the first substrate base plate and faces one side of the back plate;
the back plate includes: the second substrate base plate is provided with a control unit, a plurality of target support columns and a plurality of anode blocks, light-emitting blocks and cathode patterns, the control unit is arranged on the second substrate base plate, the target support columns and the anode blocks face one side of the cover plate, the light-emitting blocks are arranged on the anode blocks, and the cathode patterns are arranged on the target support columns and the light-emitting blocks, and the portions, located on the target support columns, of the cathode patterns are in contact with the heat conducting layer; the back plate further comprises: the auxiliary supporting columns are arranged on the second substrate base plate and face one side of the cover plate, the auxiliary supporting columns are in contact with the heat conducting layer, the target supporting columns are made of the same material as the auxiliary supporting columns, a row of pixel regions are formed between any two adjacent rows of the target supporting columns, two rows of pixel regions are formed between any two adjacent rows of the target supporting columns, a row of pixel regions are formed between any two adjacent rows of the auxiliary supporting columns, and the auxiliary supporting columns and the target supporting columns are arranged in the row arrangement direction at intervals one by one;
and a frame sealing adhesive is arranged between the back plate and the cover plate, and the control unit is connected with the heat conducting layer on the cover plate through conductive ions or metal balls in the frame sealing adhesive and is used for applying a regulating voltage to the heat conducting layer so as to regulate the voltage on the cathode pattern.
2. The OLED display panel of claim 1, wherein the thermally conductive layer is electrically conductive.
3. The OLED display panel of claim 1 or 2, wherein the backplane further comprises:
a pixel circuit layer disposed on the second substrate;
a pixel defining layer disposed on the pixel circuit layer and defining a plurality of pixel regions;
wherein, each pixel region on the pixel circuit layer is provided with one anode block, and the target support columns are arranged on the pixel definition layer.
4. The OLED display panel of claim 1 or 2,
the heat conduction layer is transparent, and the light-emitting block is used for emitting light in the direction far away from the second substrate base plate;
or the heat conduction layer is in a non-transparent state, and the light-emitting block is used for emitting light towards the direction close to the second substrate base plate.
5. The OLED display panel of claim 3,
the plurality of pixel regions are arranged in an array, and the plurality of target support columns arranged on the pixel definition layer are arranged in an array.
6. A method for manufacturing an OLED display panel, wherein the OLED display panel is the OLED display panel according to any one of claims 1 to 5, the method comprising:
forming a heat conduction layer on the first substrate base plate to obtain a cover plate;
forming a control unit, at least one auxiliary supporting column, a plurality of target supporting columns and a plurality of anode blocks on a second substrate, wherein the material of the target supporting columns is the same as that of the auxiliary supporting columns;
forming a light emitting block on the anode block;
forming a cathode pattern on the plurality of target support pillars and the light emitting blocks to obtain a back plate;
the cover plate and the back plate are oppositely arranged, so that the part, positioned on the target support columns, of the cathode pattern is in contact with the heat conducting layer, and the auxiliary support columns are in contact with the heat conducting layer, wherein a row of pixel regions are formed between any two adjacent rows of the target support columns, two rows of pixel regions are formed between any two adjacent rows of the target support columns, a row of pixel regions are formed between any two adjacent rows of the auxiliary support columns, and the auxiliary support columns and the target support columns are arranged at intervals in the row arrangement direction;
and a frame sealing adhesive is arranged between the back plate and the cover plate, and the control unit is connected with the heat conducting layer on the cover plate through conductive ions or metal balls in the frame sealing adhesive and is used for applying a regulating voltage to the heat conducting layer so as to regulate the voltage on the cathode pattern.
7. The method of claim 6, wherein the thermally conductive layer is electrically conductive.
8. A display device, characterized in that the display device comprises: the OLED display panel of any one of claims 1 through 5.
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