CN115019651A

CN115019651A - Curled display module and production process thereof

Info

Publication number: CN115019651A
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: 2022-09-06
Anticipated expiration: 2042-06-20
Also published as: CN115019651B

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, a plurality of film layer grooves are uniformly distributed in one side of the CPI film at intervals, the film layer grooves are filled with the first hardening coating, the second hardening coating covers the side, provided with the film layer grooves, of the CPI film, and the other side of the CPI film is attached to one side of the display unit. This display module assembly curls improves the design through the structure that goes on flexible apron, can make flexible apron satisfy under mechanical properties's prerequisite, reduces the cracked risk of flexible apron, the normal operating of guarantee display module assembly curls.

Description

Curled 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 meet the requirement that the display screen can be conveniently stored or carried when not in use, the flexible display screen capable of being rolled attracts more and more attention.

At present, the curled terminal is mostly considered to be used in the fields of notebook computers, tablet computers, vehicle-mounted computers and the like, and in consideration of space saving, carrying convenience and the like, the curling radius of the curled terminal is continuously reduced, the number of curled turns is continuously increased, so that the risk of breakage of a flexible cover plate positioned on a curled display module is greatly increased, the design requirement of a terminal mechanism is higher and higher, and the curled terminal mechanism becomes a huge challenge of the current display industry.

In the prior art, a method of coating a thick layer of 5 μm on the surface of a CPI (transparent Polyimide) film by using a hardened coating is often selected to form a flexible cover plate, however, due to the excessively large thickness of the hardened coating, the occurrence of the situation of the curling fracture of the hardened coating cannot be avoided; however, the manner of directly reducing the thickness of the hardened coating can cause the flexible cover plate to fail to achieve mechanical properties (i.e., scratch resistance and ball and pen dropping performance of the flexible cover plate), and thus the protection effect cannot be achieved.

Disclosure of Invention

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

In order 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, a plurality of film layer grooves are uniformly distributed on one side of the CPI film at intervals, the film layer grooves are filled with the first hardening coating, the second hardening coating covers one side of the CPI film, which is provided with the film layer grooves, and the other side of the CPI film is attached to one side of the display unit.

As the preferable technical scheme of the curled display module, the film layer grooves are cuboid, and the film layer grooves are arranged in a linear array mode.

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

As a preferable technical solution of the curled display module, an included angle between the length direction of the film layer groove and the length direction of the CPI film is 90 °.

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

As a preferred technical scheme of the curled 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 the end face block.

In a preferred embodiment of the display module having the curved shape, a longitudinal direction of the end surface block is perpendicular to a longitudinal direction of the display unit, and a plurality of end surface holes are formed through the end surface block at intervals in the longitudinal direction of the end surface block.

As a 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 μm.

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

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

s20, coating the second hardened coating on the side, provided with the film layer groove, of the CPI film;

and S30, attaching the side, which is not coated with the second hardened coating, of the CPI film to one side of the display unit, and then rolling the display unit on the receiving shaft.

The invention has the beneficial effects that:

this display module that curls is through seting up the rete groove on the CPI membrane to and utilize the mode that first sclerosis coating filled the rete groove, improved the structure of flexible apron effectively, can also accomplish the optimal design that reduces the thickness of second sclerosis coating smoothly under the prerequisite that has satisfied flexible apron mechanical properties, the aforesaid sets up the crimping performance that has promoted the flexible apron, makes the cracked risk of curling of flexible apron can reduce. The design that the first hardening coating is matched with the second hardening coating optimizes the stress condition and the protection effect of the flexible cover plate, so that the mechanical property of the flexible cover plate can still meet the requirement under the condition that the thickness of the second hardening coating is reduced.

This display module assembly that curls production simple process is reliable, when having guaranteed that above-mentioned display module assembly that curls processes smoothly and accomplishes, has still optimized the flow of flexible apron processing, has reduced the cost of display module assembly production that curls, has promoted the efficiency of display module assembly production that curls.

Drawings

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

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

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

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

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

fig. 6 is a third top view of the flexible cover according to the embodiment of the present invention.

In the figure:

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

210. a housing case; 220. a storage shaft; 310. an end face block; 311. an end face hole.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, 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 a part of the embodiments of the present invention, and not all 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.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

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

This display module that curls is through seting up rete groove 111 on CPI membrane 110 to and utilize the mode that first sclerosis coating 120 filled rete groove 111, improved the structure of flexible apron 100 effectively, can also accomplish the optimal design that second sclerosis coating 130 thickness reduces smoothly under the prerequisite that has satisfied flexible apron 100 mechanical properties, the aforesaid sets up the curling performance that has promoted flexible apron 100, makes the cracked risk of flexible apron 100 curling reduce. The design of the first hardened coating 120 and the second hardened coating 130 in cooperation optimizes the stress condition and the protection effect of the flexible cover plate 100, so that the mechanical properties of the flexible cover plate 100 can still meet the requirements under the condition that the thickness of the second hardened coating 130 is reduced.

In this embodiment, the first cured coating 120 is made of a resin composite material including 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 fracture resistance of the curled display module. The second hardened coating 130 is made of an organic or inorganic composite material and contains fluoroalkyl silane. Wherein, fluorocarbon group in the fluoroalkyl silane can play hydrophobic oleophobic effect, when realizing display module's protective effect, still has the ability of resistant fingerprint.

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

In this embodiment, the display module further includes a housing 210, the housing 210 has a housing cavity, the housing shaft 220 is rotatably connected in the housing cavity, the housing 210 has a housing opening communicating the housing cavity with the external environment, and the display unit partially passes through the housing opening to enter the external environment. The housing 210 can be rolled up on the housing shaft 220 to achieve the positioning effect of the display unit, and can also achieve the protection purpose of the display unit. Above-mentioned setting up of accomodating casing 210 has reduced the display element and has suffered outside direct impact and produce the risk of damage, has reduced display element's maintenance frequency, has prolonged this curly display module assembly's life. Specifically, the storage housing 210 is a cylinder, the storage cavity is a cylinder, two ends of the storage shaft 220 are both sleeved on inner rings of the rotating bearings, outer rings of the rotating bearings are fixedly connected to two ends of the storage housing 210, the housing opening is rectangular and is opened on a side surface of the storage housing 210, and the length direction of the rectangle is the same as the length direction of the storage housing 210.

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

Specifically, the storage shaft 220 can rotate around the axis of the storage shaft 220, so that the display unit is stored in the storage cavity, and the storage shaft 220 is stopped by the end face block 310 and abuts against the storage housing 210. The design that the containing shaft 220 can rotate around the axis provides the display unit with the automatic resetting capability, thereby greatly simplifying the operation process of users and improving the working efficiency of the curled display module; the design that the end face block 310 leans against the storage shell 210 avoids the situation that the display unit is completely rolled in the storage cavity, reduces the difficulty of dragging the display unit by users, and improves the operation efficiency and the use experience of the users.

Further, the longitudinal direction of the end face block 310 is perpendicular to the longitudinal direction of the display unit, and a plurality of end face holes 311 penetrate through the end face block 310 at intervals along the longitudinal direction of the end face block 310. The design of terminal surface hole 311 provides the mode through terminal surface hole 311 and terminal surface piece 310 fixed connection for the external member, and the aforesaid is improved and is made things convenient for this location operation of curling display module assembly, has further promoted user of service's use and has experienced.

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

Further, the length direction of the film layer groove 111 is arranged 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 longitudinal direction of the film layer groove 111 is at a 90 ° angle to the longitudinal direction of the CPI film 110. Above-mentioned design makes the display element when rolling up on accomodating axle 220, and first hardened coating 120 takes the length direction of first hardened coating 120 and the plane at depth direction place as the benchmark and takes place to buckle, and this has greatly reduced the deformation volume of first hardened coating 120, has reduced the risk that first hardened coating 120 bends and breaks, has promoted the crimping performance of flexible apron 100 to the life of flexible apron 100 has been prolonged.

In another embodiment, as shown in fig. 5, the longitudinal direction of the film layer groove 111 is at an angle of 0 deg. to the longitudinal direction of the CPI film 110. In the above structure, the deformation amount of the flexible cover 100 is larger than the case that the longitudinal direction of the film layer groove 111 is perpendicular to the longitudinal direction of the CPI film 110, and the curling performance of the flexible cover 100 is poorer than that of the embodiment, but the flexible cover 100 can still be applied to a specific implementation production scene.

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 ends of the film layer slots 111 do not extend through both edges of the CPI film 110. The winding cost of the film layer groove 111 is higher, but the ability of the film layer groove 111 to prevent the flexible cover plate from breaking is obviously better than the two embodiments.

The embodiment also provides a production process of the curled display module, which is applied to the curled display module and comprises the following steps: coating the first hardened coating 120 in the film layer groove 111; coating the second hardened coating 130 on the side of the CPI film 110 with the film layer groove 111; the side of the CPI film 110 not coated with the second hardened coating 130 is attached to the side of the display unit, which is then taken up on the take-up reel 220.

This display module assembly that curls production technology is simple reliable, when having guaranteed that above-mentioned display module assembly that curls processes smoothly and accomplishes, has still optimized the flow of flexible apron 100 processing, has reduced the cost of display module assembly production that curls, has promoted the efficiency of display module assembly production that curls.

In this embodiment, the first hardened coating 120 and the second hardened coating 130 are two coatings of different materials, 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 is coated first, and then the second hardened coating 130 is coated. In other embodiments of this embodiment, the first hardened coating 120 and the second hardened coating 130 are made of the same material, and when the first hardened coating 120 and the second hardened coating 130 are applied to the CPI film 110, the first hardened coating 120 and the second hardened coating 130 can be formed simultaneously while ensuring the second hardened coating 130 has a uniform thickness.

In this embodiment, the receiving housing 210, the receiving shaft 220 and the display unit are conventional devices on a rolling display module, and the specific working principle and the arrangement mode thereof are common knowledge in the art and are well known to those skilled in the art, and are not described herein again.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A curled display module, comprising:

a display unit wound on the storage shaft (220);

flexible apron (100), including CPI membrane (110), first sclerosis coating (120) and second sclerosis coating (130), one side interval equipartition of CPI membrane (110) has a plurality of rete grooves (111), first sclerosis coating (120) are filled up rete groove (111), second sclerosis coating (130) cover CPI membrane (110) has been seted up one side of rete groove (111), the opposite side subsides of CPI membrane (110) are located one side of display element.

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

3. The scrolling display module of claim 2, wherein the length direction of the film layer groove (111) is angled with respect to the length direction of the CPI film (110).

4. A scrolling display module according to claim 3, wherein the longitudinal direction of the film layer groove (111) forms an angle of 90 ° with the longitudinal direction of the CPI film (110).

5. The scrolling display module of claim 1, wherein both ends of the film layer groove (111) penetrate both edges of the CPI film (110).

6. The rollable display module according to claim 1, wherein one end of the display unit is attached to a side of the receiving shaft (220) and the other end is attached to an end block (310).

7. The curling display module according to 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) penetrate through the end face block (310) at intervals along the length direction of the end face block (310).

8. The scrolling display module according to any of claims 1 to 7, wherein the groove depth of the film layer groove (111) is 2.5 to 3.5 μm.

9. A crimped display module according to any one of claims 1 to 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, 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 layer groove (111);

s20, coating the second hardened coating (130) on the side, provided with the film layer groove (111), of the CPI film (110);

and S30, attaching the side, which is not coated with the second hardened coating (130), of the CPI film (110) to one side of the display unit, and then rolling the display unit on the receiving shaft (220).