CN109950283B - Display driving module, display panel and preparation method of display driving module - Google Patents
Display driving module, display panel and preparation method of display driving module Download PDFInfo
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- CN109950283B CN109950283B CN201910228271.5A CN201910228271A CN109950283B CN 109950283 B CN109950283 B CN 109950283B CN 201910228271 A CN201910228271 A CN 201910228271A CN 109950283 B CN109950283 B CN 109950283B
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Abstract
The invention provides a display driving module, a display panel and a preparation method of the display driving module, and solves the problems that when a metal layer is prepared in the production process of an OLED, the light-emitting effect is influenced due to metal migration, and the product yield is reduced. The method comprises the following steps: a display driving module includes: a source and a drain; an active layer positioned at one side of the source electrode and the drain electrode; a via filled with an electrical connection material for forming an electrical connection between the source or the drain and the active layer; and the extended active region is connected with the active layer, wherein one part of the projection of the via hole on the plane of the active layer is positioned in the active layer, and the other part of the projection of the via hole is positioned in the extended active region.
Description
Technical Field
The invention relates to the technical field of display driving, in particular to a display driving module, a display panel and a preparation method of the display driving module.
Background
Organic Light-Emitting diodes (OLEDs) are widely used in the display and communication fields due to their low power consumption, high luminance, low radiation to the human body, long lifetime, and other characteristics. When the OLED display device is manufactured, due to the influence of the process, the size of an active layer in a driving circuit corresponding to a pixel at the edge of the display device is smaller than normal, so that when a metal layer is filled in a via hole on the active layer, metal leakage occurs, and metal migration occurs, so that the light emitting effect of the OLED is influenced, and the yield of products is reduced.
Disclosure of Invention
In view of the above, the invention provides a display driving module, a display panel and a manufacturing method of the display driving module, which solve the problems that when a metal layer is manufactured in an OLED production process, the light emitting effect is affected due to metal migration, and the product yield is reduced.
An embodiment of the invention provides a display driving module, a display panel and a preparation method of the display driving module, which includes:
a display driving module includes: a source and a drain; an active layer positioned at one side of the source electrode and the drain electrode; a via filled with an electrical connection material for forming an electrical connection between the source or the drain and the active layer; and the extended active region is connected with the active layer, wherein one part of the projection of the via hole on the plane of the active layer is positioned in the active layer, and the other part of the projection of the via hole is positioned in the extended active region.
In one embodiment, the extended active region is planar with the active layer.
In one embodiment, the extension region is made of polysilicon.
In one embodiment, the via is one or more of the following shapes in combination: circular, rectangular and hexagonal holes.
In one embodiment, the material of the electrical connection material is one or more of the following materials: molybdenum, silver, titanium and aluminum.
In one embodiment, further comprising an insulating layer disposed between the source or the drain and the active layer, wherein the via filled with the electrical connection material is disposed within the insulating layer.
A display panel comprises the display driving module.
In one embodiment, the display driving module is configured to drive pixels at the edge of the display panel.
A method for preparing a display driving module comprises providing a substrate; preparing the buffer layer on the substrate; preparing an active layer on the buffer layer; preparing an extended active region to which the active layer is connected; preparing a via hole on the active layer; filling a connecting material in the via hole for forming an electrical connection between the source electrode or the drain electrode and the active layer; wherein one part of the projection of the via hole on the plane of the active layer is positioned in the active layer, and the other part of the projection of the via hole is positioned in the extended active region.
In one embodiment, the extended region is made by an exposure development process.
The display driving module comprises a source electrode, a drain electrode and an active layer, wherein the active layer is positioned on one side of the source electrode and one side of the drain electrode; and the extended active region is connected with the active layer, wherein one part of the projection of the via hole on the plane of the active layer is positioned in the active layer, and the other part of the projection of the via hole is positioned in the extended active region. Through set up extension active area on the active layer, prevent because the area of active layer is big enough for partly expose outside the active layer of via hole, when having solved in OLED production process filling the connecting material in the via hole, the metal spills from exposing in the via hole outside the active layer, thereby influences luminous effect, reduces the problem of product yield.
Drawings
Fig. 1 is a schematic structural diagram of a display driving module according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a display driving module according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a display driving module according to an embodiment of the invention.
As shown in fig. 1, the display driving module includes a source electrode 1, a drain electrode 2, and an active layer 3, the active layer 3 is disposed at one side of the source electrode 1 and the drain electrode 2, the active layer 3 and the source electrode 1 can be electrically connected through a via 4 filled with an electrical connection material, and the active layer 3 and the drain electrode 2 can be electrically connected through the via 4 filled with the electrical connection material. The display module further comprises an extended active region 5, the extended active region 5 is connected with the active layer 3, and the extended active region 5 can be used as the extended active region 5 to increase the area of the active layer 3. Wherein a part of the projection of the via 4 onto the plane of the active area is arranged inside the active layer 3 and another part is arranged inside the extended active area 5, i.e. the bottom of the via 4 is arranged on both the active layer 3 and the extended active area 5. Through set up extension active area 5 on active layer 3, prevent because the area of active layer 3 is big enough for partly expose outside active layer 3 of via hole 4, when having solved in the OLED production process filling the electrical connection material in via hole 4, the metal spills from exposing in the via hole 4 outside active layer 3, thereby influences the luminous effect, reduces the problem of product yield.
It is understood that the extended active region 5 may be disposed on the side of the active layer 3 where the source electrode 1 is formed, the extended active region 5 may be disposed on the side of the active layer 3 where the drain electrode 2 is formed, and the extended active region 5 may be disposed on both sides of the active layer 3 where the source electrode 1 is formed and the drain electrode 2 is formed. The location of the extended active region 5 on the active layer 3 can be adjusted according to actual production and user requirements, and the specific location of the extended active region 5 on the active layer 3 is not limited in the present invention.
It is also understood that the via 4 can be formed by a photolithography process, and can also be realized by other process means, the specific process manner for forming the via 4 can be adjusted according to production and user requirements, and the specific manner for forming the via 4 is not limited in the present invention. The via 4 may be one or more combinations of the following shapes: the through hole 4 can be a circular hole, a rectangular hole and a hexagonal hole, or the through hole 4 can be a hole with other shapes, the shape of the through hole 4 of the actual display driving module can be adjusted according to production and user requirements, and the specific shape of the through hole 4 is not limited by the invention.
It will also be appreciated that the material of the electrical connection material may be one or more of the following: molybdenum, silver, titanium and aluminum, on the basis that the electric connection material can realize the electric connection between the source layer 3 and the source electrode 1 or the drain electrode 2, the material of the electric connection material can be adjusted according to the production and the user requirements, and the specific material of the electric connection material is not limited in the invention.
In an embodiment of the present invention, the extended active region 5 and the active layer 3 are on the same plane, and the thickness of the extended active region 5 and the thickness of the active layer 3 may be the same. The extended active region 5 and the active layer 3 are arranged on the same plane, no extra process step is added in the preparation process, the method is simple and easy to implement, the same extended active region 5 and the same active layer 3 are prepared, the bottoms of the via holes 4 can be simultaneously arranged on the active layer 3 and the extended active region 5, and a part of the via holes 4 is better prevented from being exposed out of the active layer 3, so that the problem that when the via holes 4 are filled with the charging connecting material, metal leaks out of the via holes 4 exposed out of the active layer 3, the light-emitting effect is influenced, and the product yield is reduced is solved.
It is understood that the thickness of the extended active region 5 may be equal to the thickness of the active layer 3, or the thickness of the extended active region 5 may be greater than the thickness of the active layer 3. Specifically, the thickness of the extended active region 5 and the thickness of the active layer 3 may be adjusted according to the actual production process and the user requirement, and the invention does not limit the thickness of the extended active region 5 and the thickness of the active layer 3.
In an embodiment of the present invention, the active layer 3 is made of polysilicon, and the extended active region 5 is made of polysilicon. The active layer 3 and the extended active region 5 are made of polysilicon, so that the process steps are simplified during preparation, and no additional production cost is increased.
It will be appreciated that the extended active region 5 may be polysilicon, or it may be of other materials. The material of the extended active region may be the same as that of the active layer 3, or may be different from that of the active layer 3. On the premise that various functions of the display driving module can not be influenced, and the extended active region 5 can prevent the electric connection material in the through hole 4 from overflowing, the specific material of the extended active region is not limited.
In an embodiment of the invention, the display driving module further includes an insulating layer disposed between the source electrode 1 or the drain electrode 2 and the active layer 3, wherein the via hole 4 filled with the electrical connection material is disposed in the insulating layer. The via 4 filled with the electrical connection material may be disposed at a side where the active layer 3 is connected to the drain electrode 2, or at a side where the active layer 3 is connected to the source electrode 1, or at both sides where the active layer 3 is connected to the drain electrode 2 and the active layer 3 is connected to the source electrode 1. The insulating layer can isolate the source electrode 1 or the drain electrode 2 from the active layer 3, and prevent a short circuit phenomenon between the source electrode 1, the drain electrode 2 and the active layer 3.
It is understood that the material of the insulating layer may be one or more of the following materials: silicon nitride and silicon oxide. The material of the insulating layer can be adjusted according to actual production and customer requirements, and the specific material of the first insulating layer is not limited in the invention.
In an embodiment of the invention, the display driving module further includes a substrate, a buffer layer and a passivation layer. The buffer layer is arranged on one side of the substrate, the active layer 3 is arranged on one side of the buffer layer far away from the substrate, the insulating layer is arranged on one side of the active layer 3 far away from the buffer layer, the source electrode 1 and the drain electrode 2 are arranged on one side of the insulating layer far away from the active layer 3, and the passivation layer is arranged on one side of the source electrode 1 and the drain electrode 2 far away from the insulating layer. The substrate can support the display driving module; the buffer layer can improve the anti-beating characteristic of the display driving module; the passivation layer is a functional layer formed by the metal or the alloy, improves the capability of the display module structure in resisting harsh environment, and is beneficial to improving the photoelectric parameter performance of the display device.
It is understood that the material of the substrate may be glass, or any other material that can be used as the substrate, and the specific material of the substrate is not limited in the present invention.
It is also understood that the passivation layer may be made of one or more of silicon nitride, silicon oxide, rubber and resin. The material of the passivation layer can be adjusted according to actual production and customer requirements, and the specific material of the passivation layer is not limited by the invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the invention.
As shown in fig. 2, the display panel includes the display driving module 01 described in the above embodiments. The display panel may further include a light-emitting layer 02, a polarizer layer 03, and a touch layer 04. The light emitting layer 02 is arranged on one side of the display driving module 01 and is used for emitting display light under the driving of the display driving module 01; the polarizer layer 03 is arranged on one side of the luminescent layer 02 far away from the display driving module 01; the touch layer 04 is arranged on one side of the polarizer layer 03 far away from the display driving module 01 and is used for achieving a touch function. The light-emitting layer 02 includes pixels, and the display driving module 01 can be used to drive the pixels at the edge of the display panel to emit light. Because the size of the active layer 3 in the driving circuit corresponding to the pixel at the edge of the display device is smaller than normal due to the influence of the process, metal leakage can occur when a metal layer is filled in the via hole on the active layer 3, the display panel of the invention comprises the display driving module 01 in the embodiment, the display driving module 01 comprises a source electrode 1, a drain electrode 2 and the active layer 3, wherein the active layer 3 is positioned at one side of the source electrode 1 and one side of the drain electrode 2, and the display module further comprises a via hole 4 filled with an electric connecting material and used for forming electric connection between the source electrode 1 or the drain electrode 2 and the active layer 3; and an extended active region 5 connected to the active layer 3, wherein a part of a projection of the via 4 on a plane where the active layer 3 is located inside the active layer 3, and another part is located inside the extended active region 5. Through set up extension active area 5 on active layer 3, prevent because the area of active layer 3 is big enough for partly expose outside active layer 3 of via hole 4, when having solved in the OLED production process filling the electrical connection material in via hole 4, the metal spills from exposing in the via hole 4 outside active layer 3, thereby influences the luminous effect, reduces the problem of product yield.
It can be understood that the display driving module 01 of the display panel can be used for driving the pixels at the edge of the display panel to emit display light, and can also be used for driving the pixels at the non-edge area of the display panel to emit display light. The present invention does not limit the positions of the pixels on the display panel specifically driven by the display driving module 01.
It can also be understood that the area of the active layer 3 and the extended active region 5 may be equal to the area of the active region of the display driving module 01 without the extended active region 5, and the area of the active layer 3 and the extended active region 5 may not be equal to the area of the active region of the display driving module 01 without the extended active region 5. The specific area of the extended active region 5 can be adjusted according to actual production and requirements, and the specific area of the extended active region 5 is not limited by the present invention.
It is also understood that the display panel can be used in mobile phones, computers and vehicle-mounted devices, and the specific use of the display panel is not limited in the present invention.
Fig. 3 is a schematic structural diagram of a display driving module 01 according to an embodiment of the invention.
As shown in fig. 3, a method for manufacturing a display driving module 01 includes:
step S001: providing a substrate;
step S002: preparing a buffer layer on a substrate;
step S003 preparing an active layer 3 on the buffer layer;
step S004: preparing an extended active region 5 to which the active layer 3 is connected; the extension region 5 may be disposed on the side where the active layer 3 is connected to the source electrode 1, or may be disposed on the side where the active layer 3 is connected to the drain electrode 2, or may be disposed on both sides where the active layer 2 is connected to the source electrode 1 and the active layer 2 is connected to the drain electrode 1. The extended active region 5 may be prepared simultaneously with the active layer 3 or in a certain preparation sequence.
Step S005: preparing a via hole 4 on the active layer 3; the via 4 may be disposed in the insulating layer on the side where the active layer 3 is connected to the source 1, or may be disposed in the insulating layer on the side where the active layer 3 is connected to the drain 2, or may be disposed in the insulating layers on both sides where the active layer 2 is connected to the source 1 and the active layer 2 is connected to the drain 1.
Step S006: the via 4 is filled with a connection material for forming an electrical connection between the source 1 or the drain 2 and the active layer 3. The projection of the electrical connection material on the plane of the active layer 3 is partly inside the active layer 3 and partly inside the extended active region 5.
Wherein one part of the projection of the via 4 on the plane of the active layer 3 is located inside the active layer 3, and the other part is located inside the extended active region 5, that is, the bottom of the via 4 is disposed on both the active layer 3 and the extended active region 5. Through set up extension active area 5 on active layer 3, prevent because the area of active layer 3 is big enough for partly expose outside active layer 3 of via hole 4, when having solved in the OLED production process filling the electrical connection material in via hole 4, the metal spills from exposing in the via hole 4 outside active layer 3, thereby influences the luminous effect, reduces the problem of product yield.
It is understood that the extended active region 5 may be prepared by an exposure and development process, and may be prepared by other processes, and the specific preparation manner of the extended active region 5 is not limited in the present invention as long as the production requirements can be satisfied.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (8)
1. A display driving module, comprising:
a source and a drain;
an active layer positioned at one side of the source electrode and the drain electrode;
a via filled with an electrical connection material for forming an electrical connection between the source or the drain and the active layer; and
the extended active region is connected with the active layer, wherein one part of the projection of the via hole on the plane of the active layer is positioned inside the active layer, and the other part of the projection of the via hole is positioned inside the extended active region;
the extended active region and the active layer are on the same plane, and the thickness of the extended active region and the thickness of the active layer are the same;
the material of the extended active region is polysilicon, and the material of the extended active region is the same as that of the active layer.
2. The display driving module according to claim 1, wherein the via hole is one or more of the following shapes: circular, rectangular and hexagonal holes.
3. The display driving module of claim 1, wherein the electrically connecting material is one or more of the following materials: molybdenum, silver, titanium and aluminum.
4. The display driving module according to claim 1, further comprising an insulating layer disposed between the source or the drain and the active layer, wherein the via filled with the electrical connection material is disposed within the insulating layer.
5. A display panel comprising the display driving module of any one of claims 1-4.
6. The display panel of claim 5, wherein the display driving module is configured to drive pixels at edges of the display panel.
7. A preparation method of a display driving module is characterized by comprising the following steps:
providing a substrate;
preparing a buffer layer on the substrate;
preparing an active layer on the buffer layer;
preparing an extended active region to which the active layer is connected;
preparing a via hole on the active layer; and
filling a connecting material in the via hole for forming electrical connection between the source electrode or the drain electrode and the active layer;
wherein one part of the projection of the via hole on the plane of the active layer is positioned inside the active layer, and the other part of the projection of the via hole is positioned inside the extended active region;
wherein the extended active region and the active layer are on the same plane, and the extended active region and the active layer have the same thickness;
the material of the extended active region is polysilicon, and the material of the extended active region is the same as that of the active layer.
8. The method of claim 7, wherein the extended active area is formed by exposure and development.
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| KR102259231B1 (en) * | 2014-10-08 | 2021-06-01 | 삼성디스플레이 주식회사 | Organic light emitting diode display and method for manufacturing organic light emitting diode display |
| CN105304722B (en) * | 2015-09-24 | 2018-09-04 | 京东方科技集团股份有限公司 | A kind of thin film transistor (TFT) and preparation method thereof, display base plate, display device |
| CN106298957B (en) * | 2016-09-28 | 2020-06-30 | 京东方科技集团股份有限公司 | Thin film transistor, preparation method thereof, array substrate and display device |
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| CN1198596A (en) * | 1997-04-08 | 1998-11-11 | 松下电器产业株式会社 | Film transistor and making method thereof and LCD device using it |
| CN1199074C (en) * | 2002-02-12 | 2005-04-27 | 精工爱普生株式会社 | Photoelectric device, electronic apparatus and method for making photoelectric apparatus |
| CN103208453A (en) * | 2012-01-11 | 2013-07-17 | 国际商业机器公司 | Electrical Isolation Structures For Ultra-thin Semiconductor-on-insulator Devices |
| CN108122929A (en) * | 2016-11-30 | 2018-06-05 | 乐金显示有限公司 | There are two the display devices and its manufacturing method of multiple insulating layers between electrode for tool |
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