CN115019651B

CN115019651B - Crimping display module and production process thereof

Info

Publication number: CN115019651B
Application number: CN202210697345.1A
Authority: CN
Inventors: 郑财; 黄沅江
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2023-05-23
Anticipated expiration: 2042-06-20
Also published as: CN115019651A

Abstract

The invention relates to the technical field of display devices, and particularly discloses a curled display module and a production process thereof. The curled display module comprises a display unit and a flexible cover plate; the display unit is wound on the storage shaft; the flexible cover plate comprises a CPI film, a first hardening coating and a second hardening coating, wherein a plurality of film grooves are uniformly distributed on one side of the CPI film at intervals, the first hardening coating fills the film grooves, the second hardening coating covers one side of the CPI film, provided with the film grooves, and the other side of the CPI film is attached to one side of the display unit. This crimping display module assembly is through carrying out the institutional advancement design to flexible apron, can make flexible apron under the prerequisite that satisfies mechanical properties, reduces flexible apron cracked risk, ensures crimping display module assembly's normal operating.

Description

Crimping display module and production process thereof

Technical Field

The invention relates to the technical field of display devices, in particular to a curled display module and a production process thereof.

Background

In the prior art, with the development of flexible display technology, OLEDs have shown great potential in flexible displays. From a fixed flexible display screen to a foldable display screen, the display screen has the characteristics of large size and portability. In order to further realize the requirement that the display screen can be conveniently stored or carried when not in use, flexible display screens capable of being curled are attracting more and more attention.

At present, the curling terminal is mainly considered to be used in the fields of notebook computers, tablet computers, vehicle-mounted computers and the like, and the curling radius of the curling terminal is continuously reduced, the curling number of turns is continuously increased, so that the risk of fracture of a flexible cover plate positioned on a curling display module is greatly improved, the design requirement of a terminal mechanism is higher and higher, and the method becomes a great challenge of the current display industry.

In the prior art, a mode of coating a 5 mu m thick layer on the surface of a CPI (Colorless Polyimide, transparent polyimide) film with a hardening coating is often selected to form a flexible cover plate, however, the occurrence of curling and fracture of the hardening coating cannot be avoided due to the overlarge thickness of the hardening coating; the manner of directly reducing the thickness of the hardened coating can lead to the fact that the flexible cover plate cannot achieve mechanical properties (namely scratch resistance and ball drop performance of the flexible cover plate), and cannot achieve the protection effect.

Disclosure of Invention

The invention aims to provide a curled display module and a production process thereof, so as to reduce the risk of breakage of a flexible cover plate.

To achieve the purpose, the invention adopts the following technical scheme:

a curled display module comprises a display unit and a flexible cover plate; the display unit is wound on the storage shaft; the flexible cover plate comprises a CPI film, a first hardening coating and a second hardening coating, wherein a plurality of film grooves are uniformly distributed on one side of the CPI film at intervals, the first hardening coating is filled in the film grooves, the second hardening coating covers one side of the CPI film, where the film grooves are formed, and the other side of the CPI film is attached to one side of the display unit.

As the preferable technical scheme of the curling display module, the shape of the film layer groove is cuboid, and a plurality of film layer grooves are arranged in a linear array.

As the preferred technical scheme of the curly display module, the length direction of the film layer groove and the length direction of the CPI film form an included angle.

As the preferable technical scheme of the curling display module, the included angle between the length direction of the film layer groove and the length direction of the CPI film is 90 degrees.

As the preferable technical scheme of the curling display module, two ends of the film layer groove penetrate through two edges of the CPI film.

As the preferable technical scheme of the curling display module, one end of the display unit is fixedly connected to the side face of the storage shaft, and the other end of the display unit is fixedly connected with an end face block.

As the preferable technical scheme of the curling display module, the length direction of the end face block is perpendicular to the length direction of the display unit, and a plurality of end face holes are penetrated on the end face block at intervals along the length direction of the end face block.

As the preferable technical scheme of the curling display module, the groove depth of the film layer groove is 2.5-3.5 mu m.

As a preferable technical scheme of the curling display module, the thickness of the second hardening coating is 1.5-2.5 mu m.

A production process of a curl display module is applied to the curl display module, and comprises the following steps:

s10, coating the first hardening coating in the film layer groove;

s20, coating the second hardening coating on one side of the CPI film, on which the film layer groove is formed;

and S30, attaching the side, not coated with the second hardening coating, of the CPI film to one side of the display unit, and then winding the display unit on the storage shaft.

The invention has the beneficial effects that:

this curl display module assembly has improved the structure of flexible apron effectively through seting up the rete groove on CPI membrane to and utilize the mode in first hardening coating packing rete groove, can also accomplish the optimal design that reduces second hardening coating thickness smoothly under the prerequisite that has satisfied flexible apron mechanical properties, and the crimping performance of flexible apron has been promoted in above-mentioned setting for flexible apron curls cracked risk and can reduce. The design of the first hardening coating and the second hardening coating in a matching way optimizes the stress condition and the protection effect of the flexible cover plate, so that the mechanical performance of the flexible cover plate can still meet the requirement under the condition that the thickness of the second hardening coating is reduced.

The production process of the crimping display module is simple and reliable, the smooth processing completion of the crimping display module is ensured, the processing flow of the flexible cover plate is optimized, the production cost of the crimping display module is reduced, and the production efficiency of the crimping display module is improved.

Drawings

Fig. 1 is a schematic structural diagram of a curl display module according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a curled display module according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a flexible cover plate provided by an embodiment of the present invention;

FIG. 4 is a top view of a flexible cover plate according to an embodiment of the present invention;

FIG. 5 is a second top view of the flexible cover plate according to the embodiment of the present invention;

fig. 6 is a top view III of a flexible cover plate provided by an embodiment of the invention.

In the figure:

100. a flexible cover plate; 110. CPI film; 111. a film layer groove; 120. a first hardened coating; 130. a second hardened coating;

210. a storage case; 220. a storage shaft; 310. an end face block; 311. and (5) end face holes.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 6, the present embodiment provides a curled display module comprising a display unit and a flexible cover plate 100; the display unit is wound on the storage shaft 220; the flexible cover plate 100 comprises a CPI film 110, a first hardening coating 120 and a second hardening coating 130, wherein a plurality of film layer grooves 111 are uniformly distributed on one side of the CPI film 110 at intervals, the first hardening coating 120 fills the film layer grooves 111, the second hardening coating 130 covers one side of the CPI film 110 where the film layer grooves 111 are formed, and the other side of the CPI film 110 is attached to one side of the display unit.

This curling display module through set up rete groove 111 on CPI membrane 110 to and utilize the mode of first hardening coating 120 packing rete groove 111, improved the structure of flexible apron 100 effectively, can also accomplish the optimal design to the reduction of second hardening coating 130 thickness smoothly under the prerequisite that has satisfied flexible apron 100 mechanical properties, the curling performance of flexible apron 100 has been promoted in above-mentioned setting for flexible apron 100 curls the fracture risk and can reduce. The design of the first hardened coating 120 in combination with the second hardened coating 130 optimizes the stress conditions and protective effects of the flexible cover plate 100 such that the mechanical properties of the flexible cover plate 100 can still meet the requirements with a reduced thickness of the second hardened coating 130.

In this embodiment, the first hardening coating 120 is made of a resin composite material and comprises 601Q-35 resin. The 601Q-35 resin is an organic-inorganic hybrid oligomer, has the characteristics of high hardness, good wear resistance and strong cracking resistance, and can effectively improve the cracking resistance of the curled display module. The second hardening coating 130 is made of an organic or inorganic composite material and contains fluoroalkyl silane. The fluorocarbon group in the fluoroalkyl silane can play a role in hydrophobic and oleophobic, and has fingerprint resistance while achieving the protection effect of the display module.

Preferably, the film layer groove 111 has a groove depth of 2.5 to 3.5 μm; the thickness of the second hardened coating 130 is 1.5-2.5 μm.

In this embodiment, the curl display module further includes a housing 210, the housing 210 is provided with a housing cavity, the housing shaft 220 is rotatably connected in the housing cavity, the housing 210 is provided with a housing opening communicating the housing cavity with the external environment, and the display unit portion passes through the housing opening and enters the external environment. The setting of the storage case 210 not only can play a role in positioning for the display unit wound on the storage shaft 220, but also can achieve the purpose of protecting the display unit. The above-mentioned setting of the housing 210 reduces the risk of damage to the display unit caused by external direct impact, reduces the maintenance frequency of the display unit, and prolongs the service life of the curled display module. Specifically, the housing 210 is a cylinder, the housing cavity is a cylinder, both ends of the housing shaft 220 are sleeved on the inner ring of the rotating bearing, the outer ring of the rotating bearing is fixedly connected to both ends of the housing 210, the housing opening is rectangular, the housing opening is formed on the side surface of the housing 210, and the length direction of the rectangle is the same as the length direction of the housing 210.

Further, one end of the display unit is fixedly connected to the side surface of the storage shaft 220, and the other end is fixedly connected to the end surface block 310. The design that one end of the display unit is fixedly connected to the storage shaft 220 ensures stable connection between the storage shaft 220 and the display unit, and ensures that the display unit can be smoothly wound on the storage shaft 220; the design of the end face block 310 can ensure that the dragging action of the user on the display unit can be successfully completed on the premise of reducing the damage risk of the display unit and the flexible cover plate 100.

Specifically, the housing shaft 220 is rotatable about the axis of the housing shaft 220, and the display unit is wound up in the housing cavity, and the housing shaft 220 is stopped against the housing case 210 by the end surface block 310. The design that the storage shaft 220 can rotate around the axis provides the automatic resetting capability for the display unit, so that the operation flow of a user is greatly simplified, and the working efficiency of the crimping display module is improved; the design that terminal surface piece 310 and storage shell 210 offset are leaned on has avoided the display element to roll up in the circumstances of accomodating the intracavity completely to take place, has reduced the degree of difficulty that the user drags the display element, has improved user's operating efficiency and use experience.

Still further, the length direction of the end face block 310 is perpendicular to the length direction of the display unit, and a plurality of end face holes 311 are formed in the end face block 310 at intervals along the length direction of the end face block 310. The design of terminal surface hole 311 provides through terminal surface hole 311 and terminal surface piece 310 fixed connection's mode for the external member, and above-mentioned improvement has made things convenient for the location operation to this crimping display module assembly, has further promoted user experience of user.

In this embodiment, the film layer groove 111 is rectangular, and a plurality of film layer grooves 111 are arranged in a linear array. In other implementations of this embodiment, the plurality of film layer grooves 111 are arranged in a circular array or a rectangular array.

Further, the length direction of the film layer groove 111 is disposed at an angle to the length direction of the CPI film 110. The above definition provides a number of different options for the arrangement of the film layer slots 111.

As shown in fig. 4, the angle between the longitudinal direction of the film layer groove 111 and the longitudinal direction of the CPI film 110 is 90 °. By the design, when the display unit is wound on the storage shaft 220, the first hardened coating 120 is bent based on the plane where the length direction and the depth direction of the first hardened coating 120 are located, so that the deformation of the first hardened coating 120 is greatly reduced, the risk of bending fracture of the first hardened coating 120 is reduced, the crimping performance of the flexible cover plate 100 is improved, and the service life of the flexible cover plate 100 is prolonged.

In another embodiment, as shown in fig. 5, the length direction of the film layer groove 111 is at an angle of 0 ° to the length direction of the CPI film 110. In the above-mentioned structure, the deformation of the flexible cover plate 100 is greater than that of the case that the length direction of the film layer groove 111 is perpendicular to the length direction of the CPI film 110, and the curling performance of the flexible cover plate 100 is also inferior to that of the embodiment, but the flexible cover plate 100 can be applied to a specific implementation and production scenario.

In this embodiment, both ends of the film layer groove 111 penetrate both edges of the CPI film 110. In another embodiment, as shown in fig. 6, the two ends of the membrane layer groove 111 do not pass through the two edges of the CPI membrane 110. The film slot 111 is more expensive to wrap around, but the design of the film slot 111 provides significantly better protection against flexible cover breakage than the two embodiments.

The embodiment also provides a production process of the curl display module, which is applied to the curl display module and comprises the following steps: coating the first hardening coating 120 in the film layer groove 111; coating a second hardening coating 130 on one side of the CPI film 110 where the film layer groove 111 is formed; the CPI film 110 is attached to one side of the display unit on the side not coated with the second hardening coating 130, and then the display unit is wound up on the receiving shaft 220.

The production process of the crimping display module is simple and reliable, the smooth processing completion of the crimping display module is ensured, the processing flow of the flexible cover plate 100 is optimized, the production cost of the crimping display module is reduced, and the production efficiency of the crimping display module is improved.

In this embodiment, the first cured coating 120 and the second cured coating 130 are two different materials, and when the first cured coating 120 and the second cured coating 130 are coated on the CPI film 110, the first cured coating 120 is coated first and then the second cured coating 130 is coated. In other implementations of this embodiment, the first hardened coating 120 and the second hardened coating 130 are made of the same coating material, and when the first hardened coating 120 and the second hardened coating 130 are coated on the CPI film 110, the first hardened coating 120 and the second hardened coating 130 may be formed simultaneously on the premise of ensuring that the thickness of the second hardened coating 130 is uniform.

In this embodiment, the accommodating case 210, the accommodating shaft 220 and the display unit are disposed conventionally on the curl display module, and the specific working principle and the disposing manner thereof are common knowledge in the art, and are well known to those skilled in the art, and are not repeated herein.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A curled display module, comprising:

a display unit wound around a storage shaft (220);

the flexible cover plate (100) comprises a CPI film (110), a first hardening coating (120) and a second hardening coating (130), wherein a plurality of film layer grooves (111) are uniformly distributed on one side of the CPI film (110) at intervals, the film layer grooves (111) are filled with the first hardening coating (120), one side of the film layer grooves (111) are formed in the CPI film (110) in a covering mode, and one side of the display unit is attached to the other side of the CPI film (110).

2. The curled display module of claim 1, wherein the film layer groove (111) is rectangular, and a plurality of the film layer grooves (111) are arranged in a linear array.

3. The curled display module of claim 2 wherein the length direction of the film slot (111) is disposed at an angle to the length direction of the CPI film (110).

4. A curled display module according to claim 3 wherein the length direction of said film groove (111) is at an angle of 90 ° to the length direction of said CPI film (110).

5. A curled display module according to claim 1 wherein the film grooves (111) are formed at both ends through both edges of the CPI film (110).

6. The curled display module of claim 1, wherein one end of the display unit is fixedly connected to the side surface of the housing shaft (220), and the other end is fixedly connected to the end surface block (310).

7. The curled display module of claim 6 wherein the length direction of the end face block (310) is perpendicular to the length direction of the display unit, and a plurality of end face holes (311) are formed in the end face block (310) at intervals along the length direction of the end face block (310).

8. A curled display module according to any of claims 1-7 wherein the film layer grooves (111) have a groove depth of 2.5-3.5 μm.

9. The curled display module of any of claims 1-7, wherein the second hardened coating (130) has a thickness of 1.5-2.5 μm.

10. A process for producing a curled display module, which is applied to the curled display module according to any one of claims 1-9, comprising the steps of:

s10, coating the first hardening coating (120) in the film groove (111);

s20, coating the second hardening coating (130) on one side of the CPI film (110) where the film layer groove (111) is formed;

s30, attaching one side of the CPI film (110) which is not coated with the second hardening coating (130) to one side of the display unit, and then winding the display unit on the storage shaft (220).