CN110058444B - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN110058444B CN110058444B CN201910380075.XA CN201910380075A CN110058444B CN 110058444 B CN110058444 B CN 110058444B CN 201910380075 A CN201910380075 A CN 201910380075A CN 110058444 B CN110058444 B CN 110058444B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention has described a display module assembly and display device, the display module assembly includes flexible display panel and supports the membrane, support the membrane to locate at one side of the flexible display panel; the display module further comprises a first bending area, and the first bending area comprises a first bending shaft extending along a first direction; the first bending area comprises a first sub-bending area, and the elastic modulus of the support film in the first sub-bending area is gradually reduced along the second direction; the second direction is the direction from the first bending shaft to the boundary of the first bending area in the plane of the display module. The support membrane through to the bending zone is handled, obtains the region of an elastic modulus gradual change, wherein uses first bending axis to be the center toward both sides, and elastic modulus reduces in proper order, or elastic modulus reduces earlier in proper order and increases in proper order again to the bending zone obtains the shape of an approximate water droplet under the state of buckling, and the radius of buckling of increase bending zone under fold condition avoids appearing excessively buckling at the in-process of buckling and leads to flexible display panel inefficacy.
Description
Technical Field
The invention relates to the field of display, in particular to a display module and a display device.
Background
The development of the conventional flat panel display device is becoming mature, and the flexible display panel will become the mainstream of the display field by virtue of its characteristics of lightness, thinness, flexibility and impact resistance. Among them, an Organic Light Emitting Display (OLED) has excellent properties such as a fast response speed, a wide viewing angle, a high luminance, a low power consumption, and a self-Light Emitting device, and has a bending resistance, and has become one of the hot spots in research in the field of flexible Display in recent years.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a display module in the prior art, and fig. 2 is a schematic structural diagram of the display module in a folded state in the prior art. In the conventional flexible display module, in order to prevent the display panel 1 ' from failing due to any bending or bending, a supporting mechanism 2 ' is usually disposed on the lower surface of the display panel 1 '. Because the limitation of the bending capability of display panel 1 ' and supporting mechanism 2 ' itself, when the display module assembly is bent along folding axle 3 ', the bending radius that leads to folding axle 3 ' department under the folding condition is undersize easily, causes the damage to display panel 1 ' to the situation that the demonstration became invalid appears.
Disclosure of Invention
In view of this, the invention provides a display module and a display device, which solve the problem of display failure caused by too small bending radius of a flexible module in the prior art.
The invention discloses a display module which comprises a flexible display panel and a support film, wherein the support film is positioned on one side of the flexible display panel; the display module further comprises a first bending area, and the first bending area comprises a first bending shaft extending along a first direction; the first bending area comprises a first sub-bending area, and the elastic modulus of the support film in the first sub-bending area is gradually reduced along the second direction; the second direction is the direction from the first bending shaft to the boundary of the first bending area in the plane of the display module.
Optionally, the display module further includes a second bending region, and the second bending region is located on one side of the first sub-bending region away from the first bending axis along the second direction; along the second direction, the elastic modulus of the support film in the second bending area is gradually increased.
Optionally, along the second direction, the width of the first bending region is greater than or equal to the width of the second bending region.
Optionally, the display module includes a folded state, and the first bending axis has the largest bending radius in the folded state.
Optionally, the gradient range of the elastic modulus of the support film is 1-1011Pa。
Optionally, the gradient 10 of the modulus of elasticity of the support film per unit length in the first inflection zone8～109Pa/mm。
Optionally, the support film is located on a side of the flexible display panel facing away from the light exit.
Optionally, the support film of the first sub-bending region includes a plurality of strip-shaped rubber materials with different elastic moduli, and the strip-shaped rubber materials extend along the first direction.
Optionally, the material of the support membrane comprises rubber.
Optionally, the support membrane of the first bending region comprises rubber obtained through oxidation, vulcanization or fluorination treatment.
Optionally, the support film of the first bending region includes rubber obtained through ion implantation treatment.
The invention also provides a display device comprising the display panel.
Compared with the prior art, the invention has at least one of the following outstanding advantages:
according to the invention, the support film in the bending area is processed to obtain an area with gradually changed elastic modulus, wherein the elastic modulus of the support film is sequentially reduced or sequentially reduced and then sequentially increased from the first bending shaft as the center to two sides, so that the bending area of the display module in the bending state obtains a shape similar to a water drop, the bending radius of the bending area in the folding state is increased, and the failure of the flexible display panel caused by excessive bending in the bending process is avoided.
Drawings
FIG. 1 is a schematic diagram of a display module according to the prior art;
FIG. 2 is a schematic diagram illustrating a display module in a folded state according to the prior art;
FIG. 3 is a schematic view illustrating the display module folded in an ideal state;
fig. 4 is a schematic structural diagram of a display module according to an embodiment of the present invention;
FIG. 5 is a schematic view of the display module of FIG. 4 along the z-direction;
FIG. 6 is a schematic structural diagram of another display module according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another display module according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another display module according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating a display module provided in the embodiment of FIG. 4 in a folded state;
FIG. 10 is a schematic diagram illustrating a display module provided in the embodiment of FIG. 8 in a folded state;
FIG. 11 is a schematic structural diagram of another display module according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples.
Example embodiments may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein: rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship, and the layer thicknesses of some parts are exaggerated in a drawing manner for easy understanding, and the layer thicknesses in the drawings are not necessarily proportional to the actual layer thicknesses.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Further, in the following description, the same reference numerals are used in the drawings to designate the same or similar structures, and thus their repetitive description will be omitted.
At present, in order to implement a flexible folding technology, it is a common practice to reduce the structure of the whole flexible display module as much as possible, or to perform a softening process on the foldable area of the display module, so as to implement a flexible module with a radius as small as possible. Referring to fig. 3, fig. 3 is a schematic view illustrating a folding of a display module in an ideal state, and an actual display module structure cannot realize a flexible module with a small radius bending due to stacking of a plurality of film structures, especially an inorganic layer of a Thin Film Transistor (TFT) array substrate and an inorganic layer of a thin film encapsulation layer in an Organic Light Emitting Diode (OLED) display. In order to make the module in the folding area as thin as possible, the support film 2' of the display module is only disposed in the non-bending area. Under an ideal state, the flexible substrate 1' is completely softened, and the folded display module bending area presents an ideal water droplet circle state. However, in practice, the flexible substrate 1' cannot be completely softened, and only a nearly V-shaped form can be obtained, and when the flexible substrate is finally folded, the bending radius of the display module in the bending area is too small, so that the display module in the bending area is easily damaged, and thus display failure occurs.
Based on the above, the invention provides a display module, which solves the problem of display failure caused by too small bending radius of a flexible module in the prior art.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a display module according to an embodiment of the invention, and fig. 5 is a schematic structural diagram of the display module of fig. 4 along a z-direction. The invention describes a display module 10 comprising a flexible display panel 100 and a support film 200, wherein the support film 200 is positioned at one side of the flexible display panel 100; the display module 10 further includes a first bending area BA1, the first bending area BA1 includes a first bending axis 300 extending along the first direction y; the first bending region BA1 includes a first sub-bending region in which the elastic modulus of the support film 201/202 gradually decreases along the second direction x; the second direction x is a direction from the first bending axis 300 to the boundary of the first bending area BA1 in the plane of the display module 10.
It is understood that the flexible display panel 100 may be a liquid crystal display panel or an OLED display panel, and the present application does not specifically limit the light emitting type of the display panel. The elastic modulus of the support film 200 on one side of the flexible display panel 100 in the first bending area BA1 is gradually changed, that is, the strength of the support film 200 is gradually reduced in the first sub-bending area along the first direction x, so that a gradually reduced support force is provided for the bending area of the display module 10 in the folding process, on one hand, the first bending area BA1 is protected in the bending process, excessive bending of the flexible display panel 100 is avoided, and on the other hand, the folding of the display module 10 is not affected; since the elastic modulus at the first bending axis 300 is larger than that at an adjacent position, the supporting force is the largest, and thus it is defined that the bending radius at the bending axis is not excessively small. It should be noted that, in the conventional flexible display panel, when the bending radius is smaller than the limit bending radius of 2.5mm, the flexible display panel may be damaged by bending, which may cause a certain degree of display defects, even display failure. In other flexible display panels, the ultimate bend radius may also be 5mm, with different display panels having different ultimate bend radii. The bending radius is too small, which means that the bending radius of the flexible display panel is smaller than the limit bending radius, i.e. the bending radius of the display defect can be generated.
It should be noted that, in the drawings of the present embodiment, the first bending area BA1 is schematically a middle portion of the display module 10, and the first bending axis 300 is located at a middle position of the first bending area BA1, but in other embodiments, the first bending area BA1 may be located at any position of the display module 10, and the position of the first bending axis 300 depends on the specific configuration of the display module 10.
Optionally, in this embodiment, the range of the gradual change of the elastic modulus of the support film is 1 to 1011Pa. It can be understood that, for the foldable display device, the larger the bending radius of the display module is, the less the display panel is damaged, but the pursuit of the electronic product by the consumer at present is ultra-thin, i.e. the smaller the bending radius of the foldable display device is, the better, so the bending radius of the display module in the foldable device is less than 10 mm. In this embodiment, the range of the gradual change of the elastic modulus of the supporting film is 1 to 1011Pa makes the bending area of the display module 10 have a larger deformation amount, on one hand, makes the display module 10 have a smaller bending radius to meet the requirement of the bending radius of the foldable device, and on the other hand, makes the display module 10 have a better bendable performance.
Optionally, the amount of gradient 10 of the modulus of elasticity per unit length of the support film 200 at the first inflection zone BA18～109Pa/mm. Gradually increasing the modulus of elasticityThe support membrane 200 that becomes provides the holding power of gradual change for the bending region, the first bending region BA1 that is display module assembly 10 on the one hand has better bending performance, is favorable to buckling of display module assembly 10, on the other hand, the local flexible display panel 100's that local support membrane elastic modulus sudden change brought of first bending region BA1 when having avoided buckling radius undersize, the flexible display panel 100 damage that the too big brought of support membrane 200 elastic modulus sudden change department stress has been avoided.
In an alternative embodiment, please refer to fig. 6, fig. 6 is a schematic structural diagram of another display module according to an embodiment of the present invention, and the non-bending region of the display module 10 may also include a supporting film 205/206. It is understood that the modulus of elasticity of the support film 205/206 in the non-inflection region is greater than or equal to the maximum modulus of elasticity of the first inflection region BA 1. The support film 205/206 in the non-bending region can provide protection for the flexible display panel 100, and reduce the external scratch and impact on the flexible display panel 100; and the supporting film 205/206 disposed in the non-bending region prevents the flexible display panel 100 from being arbitrarily curled or bent, so as to further reduce the failure risk caused by bending, thereby improving the reliability of the display module 10. In addition, the non-bending region is provided with the support film 205/206, so that the non-bending region has better rigidity, the display module 10 has certain strength, and the display module 10 has the performances of shock resistance, falling resistance, pressing resistance, touch resistance and the like.
Optionally, referring to fig. 7 and 8, fig. 7 is a schematic structural view of another display module provided in the embodiment of the present invention, fig. 8 is a schematic structural view of another display module provided in the embodiment of the present invention, the display module 10 further includes a second bending region BA21/BA22, and the second bending region BA21/BA22 is located on a side of the first sub-bending region away from the first bending axis along the second direction x; the modulus of elasticity of support film 203/204 within second inflection region BA21/BA22 gradually increases along second direction x. It should be noted that, in the present invention, the second direction x is a direction from the first bending axis to a boundary of the first bending area, and in the embodiment of the present invention, the first bending axis is located at a middle position of the first bending area, so that, in a plane of the flexible display panel, the first bending axis is located on the left side, the second direction x1 is extended from right to left, and the second direction x2 is extended from left to right on the right side of the first bending axis. Therefore, in this embodiment, the second bending areas BA21/BA22 are respectively located at two sides of the first bending area BA1, the elastic modulus of the support film 204 in the second bending area BA21 increases in sequence along the x1 direction, and the elastic modulus of the support film 203 in the second bending area BA22 increases in sequence along the x2 direction.
It can be understood that, under the normal condition, in the display module assembly under the folding state, the bending stress of the flexible display panel at the position of the minimum bending radius is large at the folding shaft or the junction of the bending area and the non-bending area, so that the display panel is easily damaged, and further display defects are caused. Use first bending shaft as the center toward flexible display panel 100's both sides in this embodiment, the elastic modulus who supports membrane 200 reduces earlier in proper order and increases in proper order, make the support membrane elastic modulus of the juncture of first bending shaft department and bending area and non-bending area be greater than the elastic modulus of adjacent position of can buckling, thereby increased flexible display panel 100 under the state of buckling the radius of buckling of the juncture of first bending shaft department and bending area and non-bending area, reduced flexible display panel and suffered the risk of damage, the reliability that display module assembly buckled has been promoted. Optionally, the non-bending region of the display module 10 may also be provided with the support film 205/206, and the non-bending region is provided with the support film 205/206 so that the non-bending region has better rigidity, so that the display module 10 has a certain strength, and the display module 10 has the performances of shock resistance, drop resistance, press resistance, touch resistance and the like.
Alternatively, referring to fig. 9 and 10, fig. 9 is a schematic structural view of the display module provided in the embodiment of fig. 4 in a folded state, fig. 10 is a schematic structural view of the display module provided in the embodiment of fig. 8 in a folded state, and the display module 10 includes a folded state in which the first bending axis 300 has the largest bending radius R in the folded state. Referring to fig. 4 and 9, fig. 8 and 10, a supporting film 201/202 with an elastic modulus gradually decreasing along a first bending axis to a boundary of the first bending area BA1 is disposed at one side of the first bending area BA1 of the flexible display panel 100, and the supporting film 201/202 in the first bending area provides a gradually changing supporting force for the flexible display panel 100, and when bending, because the elastic modulus of the supporting film at the first bending axis 300 is greater than that at two adjacent sides, the supporting force at the first bending axis 300 is also the largest, thereby preventing a display defect caused by an excessively small bending radius at the first bending axis 300. In an optional embodiment, the second bending region is connected to the non-bending region and the first bending region BA1 of the display module 10, and the elastic modulus of the support film 200 in the bending region (the first bending region and the second bending region) is gradually decreased and then gradually increased, so that the bending of the display module 10 is facilitated, and the sudden change of stress caused by the sudden change of the local elastic modulus of the support film during the bending process is avoided, thereby reducing the risk of damage to the flexible display panel 100 during the bending process. Further, with continued reference to fig. 9 and 10, the display module in the bent state is close to the ideal water drop shape, which is similar to an ellipse. Further, the major axis of the ellipse extends in the second direction x, the minor axis extends in the z-direction, and the minimum bending radius of the flexible display panel 100 is located at the top of the major axis of the ellipse. At the moment, the maximum bending radius is formed at the first bending shaft, namely the display area near the first bending shaft is flatter than other positions of the bending area, so that the stress concentration near the first bending shaft is relieved, and the phenomenon that the bending radius at the first bending shaft is too small is avoided. It should be noted that the minimum radius of the display module 10 in the bent state may be located at other positions than the first bending axis, but the minimum bending radius of the entire display module is larger than the limit bending radius of the display module.
Referring to fig. 7 and 10 in combination, optionally, the width of the first bending area BA1 is greater than or equal to the width of the second bending area BA2 along the second direction x. In the second direction x, the width of the first bending area BA1 is D, and the width of the second bending area BA2 is D1+ D2, it can be understood that D ≧ D1+ D2. Since the elastic modulus of the support film 201 is gradually decreased and the elastic modulus of the support film 203 is gradually increased at the first sub-bending area BA1, the flexible display panel forms an approximately elliptical shape in a bent state. Further, the width of the first bending area BA1 is set to be equal to the width of the second bending area, so that the major axis of the ellipse extends along the second direction x in the bending state; by setting the width of the first bending area BA1 to be larger than the width of the second bending area, the major axis direction of the ellipse extends in the x direction while the major axis position of the ellipse moves in a direction (z direction in the drawing) away from the first bending axis; thereby the display module assembly's the shape of buckling more is close the water droplet state of ideal, has further alleviated the stress concentration of first bending axle department to avoided the demonstration defect that radius of buckling undersize caused.
In fig. 4 and 6 to 10, the position of the first bending axis 300 is schematically shown by a dotted line, and the extending direction of the dotted line is not the actual extending direction of the first bending axis.
Optionally, with continued reference to fig. 4 to 8, the supporting film 200 is located on a side of the flexible display panel 100 facing away from the light-emitting side. It will be appreciated that even with a light-transmissive material, some light is lost as it passes through the layer of light-transmissive material. Therefore, the support film 200 is disposed on a side of the flexible display panel facing away from the light exit. On one hand, the support film 200 can provide support for the flexible display panel 100, so that the minimum bending radius of the flexible display panel 100 is larger than the limit bending radius when the flexible display panel is bent, and the bending reliability of the display module is improved; on the other hand, the support film does not block the light emitted from the flexible display panel 100, and the normal display of the flexible display panel 100 is not affected.
Optionally, with continued reference to fig. 11, fig. 11 is a schematic structural view of another display module according to an embodiment of the invention, in which the support film 200 of the first bending area BA1 includes a plurality of strip-shaped adhesive materials 2011/2012/2013/2021/2022/2023 with different elastic moduli, and the strip-shaped adhesive material 2011/2012/2013/2021/2022/2023 extends along the first direction y. It should be noted that fig. 11 only shows 3 strips of adhesive material on both sides of the first bending axis 300 by way of example, and the specific number of the adhesive material is not limited. It is understood that, in the direction from the first bending axis 300 to the boundary of the first bending area BA1, the elastic modulus of the support film 2011/2012/2013 is sequentially decreased, and the elastic modulus of the support film 2021/2022/2023 is sequentially decreased; specifically, the first bending area BA1 may be coated with glue materials having different elastic moduli, the glue materials are coated in a strip shape, and the extending direction of the glue materials is the same as the extending direction of the first bending shaft 300. On the one hand, do not influence the buckling of display module assembly 10, on the other hand provides a gradual change holding power for the district of buckling, when realizing that display module assembly buckles, makes the radius of buckling no longer than the limit radius that display module assembly buckles to avoided excessively buckling the display module assembly that brings impaired or show inefficacy. It should be noted that the rubber material may also be a strip-shaped rubber material with different elastic moduli obtained by processing the same material, and the specific material of the rubber material is not limited in the present application.
Optionally, with continued reference to fig. 4-10, the material of the support film 200 includes rubber. The rubber has high elasticity of reversible deformation, the molecular chain of the rubber can be crosslinked, and the crosslinked rubber has good physical and mechanical properties and chemical stability. Therefore, the supporting film 200 is made of rubber materials, so that the strength of the supporting film 200 can be adjusted, and the strength of the bending area can be adjusted and controlled according to the bending requirement of the display module 10 while the protection strength of the display module is met.
Alternatively, with continued reference to fig. 4-10, the support membrane 200 of the first bending area BA1 comprises rubber obtained by oxidation, vulcanization or fluorination.
It is understood that the first bending area BA1 includes a polymer network structure obtained by vulcanizing rubber. From the first bending axis 300 to the position of the edge of the first bending area BA1, the sulfide concentration of the process rubber gradually decreases, so that the elastic modulus of the support film 200 gradually decreases. In the embodiment of the present invention, the base material of the support membrane 200 is rubber, wherein the vulcanization and cross-linking treatment of the rubber is performed to make the non-bending region have strong physical strength and aging resistance, while the bending region maintains the reversible deformation of the rubber, and even if the bending region is deformed for multiple times, the base material can maintain good performance of recovering the original properties. In the embodiment of the present invention, the rubber of the support film 200 may be vulcanized and then the support film 200 is attached to the side of the flexible display panel 100 away from the light-emitting side, or the rubber of the support film may be vulcanized and then the support film 200 is attached to the side of the flexible display panel 100 away from the light-emitting side.
Alternatively, the support film 200 of the first bending area BA1 may be obtained by subjecting rubber to a fluorination treatment so that the rubber has a carbon-fluorine bond and thus has a strong strength. For example, fluorine gas or xenon difluoride can be brought into contact with the surface of a rubber material to cause a chemical reaction, thereby modifying the surface of the rubber material by fluorination. The xenon difluoride surface fluorination is to sublimate the xenon difluoride into a gas state by controlling the temperature, and the fluorination reaction is carried out on the xenon difluoride and the rubber surface. Along with the prolonging of the reaction time, hydrogen atoms on the surface of the rubber are replaced by fluorine atoms, the carbon-hydrogen bonds are changed into carbon-fluorine bonds from carbon-hydrogen bonds, the carbon-hydrogen bonds can be about 415KJ/mol, the carbon-fluorine bonds can be about 515KJ/mol, the rubber before improvement is linear molecules, and the rubber after improvement of fluorination is changed into molecules with a cross-linked structure, so that the strength of the rubber is greatly enhanced. It can be understood that the fluoride concentration of the process rubber gradually decreases from the first bending axis 300 to the edge of the first bending area BA1, so that the elastic modulus of the support film 200 gradually decreases. In the embodiment of the present invention, the rubber of the support film 200 may be fluorinated and then the support film 200 is attached to the side of the flexible display panel 100 away from the light-emitting side, or the support film 200 is attached to the side of the flexible display panel 100 away from the light-emitting side and then the rubber is fluorinated.
Optionally, the support film 200 of the first bending area BA1 includes a polymer network structure obtained by an oxide treatment. The molecular chain of the rubber is mainly linear molecule containing small saturated carbon-carbon bond, peroxide and the rubber are uniformly cracked to generate free radical when being heated together, and then the free radical addition reaction or the capture of alpha-methylene active hydrogen on the molecular chain of the rubber is carried out for crosslinking reaction, so that carbon-carbon crosslinking bond is continuously formed in the reaction process, the linear rubber molecule is changed into a high molecular network structure, and the strength of the rubber is increased. It can be understood that the peroxide concentration of the process rubber gradually decreases from the first bending axis 300 to the boundary of the first bending area BA1, so that the elastic modulus of the support membrane 200 gradually decreases. Thereby increasing the strength of the rubber in the bending area while maintaining the excellent deformation performance of the rubber. Peroxides used for crosslinking of rubbers may be of a type that contains oxygen-oxygen bonds. It may include diacyl peroxide, t-alkyl peroxy ester, alkyl hydroperoxide, dialkyl peroxide, dialkyl peroxy ketal, dicumyl peroxide (DCP), Benzoyl Peroxide (BPO), 1-di-t-butylperoxy-3, 3, 5-dimethylcyclohexane (BPMC), 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane (DBPMII), 1, 3-bis (t-butylperoxyisopropyl) benzene (BIIPB), etc., but the present invention is not limited thereto. In the embodiment of the present invention, the rubber of the support film 200 may be subjected to the peroxidation treatment and then the support film 200 is attached to the side of the flexible display panel 100 away from the light exit, or the support film 200 may be attached to the side of the flexible display panel 100 away from the light exit and then the rubber of the support film 200 is subjected to the peroxidation treatment.
Alternatively, the support film 200 of the first bending area BA1 includes rubber obtained through ion implantation treatment. The ion implantation in the embodiment of the invention can optionally implant high-energy boron (B), nitrogen (N), silicon (Si) and the like into the rubber, and treat the rubber to harden the rubber and increase the strength. It can be understood that the implantation concentration of ions is gradually decreased from the first bending axis 300 to the edge of the first bending area BA1, so that the elastic modulus of the support film is gradually decreased. Optionally, the support film in the non-bending region may also include a rubber material, and further the strength of the support film in the non-bending region is increased by ion implantation, so that the non-bending region has higher strength. And the ion implantation concentration in the bending area is gradually changed, so that the reversible deformation of the rubber is kept, and the good performance of recovering the original property can be kept even if the bending area is deformed for multiple times. In the present application, the selection of the implanted ions is not specifically limited, and any technical solution that implants ions in the bending region is within the protection scope of the embodiments of the present invention. In the embodiment of the present invention, the rubber of the support film 200 may be subjected to ion implantation, and then the support film 200 is attached to the side of the display panel 100 away from the light exit, or the support film 200 is attached to the side of the flexible display panel 100 away from the light exit and then the ion implantation is performed, which is not limited in the present invention.
It should be noted that, in the embodiment of the present application, the support film in the non-bending region may be obtained by using the same material and the same process as the support film in the bending region, so as to simplify the manufacturing process of the display module.
Based on the same inventive concept, the present application further provides a display device, and referring to fig. 12, fig. 12 is a schematic view of a display device provided in an embodiment of the present application, where the display device includes any of the display panels described in the present application. In the present application, the embodiments of the display device can refer to the embodiments of the display panel, and repeated descriptions are omitted here. It should be noted that, the display device provided in the embodiments of the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following advantages: the display module comprises a flexible display panel and a support film, wherein the support film is positioned on one side of the flexible display panel; the display module further comprises a first bending area, and the first bending area comprises a first bending shaft extending along a first direction; the first bending area comprises a first sub-bending area, and the elastic modulus of the support film in the first sub-bending area is gradually reduced along the second direction; the second direction is the direction from the first bending shaft to the boundary of the first bending area in the plane of the display module. The support membrane through to the district of buckling is handled, obtains the region of a modulus of elasticity gradual change, wherein uses first bending axis to be the center toward both sides, and the modulus of elasticity of support membrane reduces in proper order, or modulus of elasticity reduces earlier in proper order and increases in proper order again to the district of buckling obtains the shape of an approximate water droplet under the state of buckling, and the radius of buckling of increase district under fold condition avoids appearing excessively buckling at the in-process of buckling and leads to flexible display panel to become invalid.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (12)
1. A display module is characterized by comprising a flexible display panel and a support film, wherein the support film is positioned on one side of the flexible display panel;
the display module further comprises a first bending area, and the first bending area comprises a first bending shaft extending along a first direction; the first bending area comprises a first sub-bending area, and the elastic modulus of the support film in the first sub-bending area is gradually reduced along a second direction;
the second direction is the direction from the first bending shaft to the boundary of the first bending area in the plane of the display module.
2. The display module according to claim 1, wherein the display module further comprises a second bending region, and the second bending region is located on a side of the first sub-bending region away from the first bending axis along the second direction;
along the second direction, the elastic modulus of the support film in the second bending area is gradually increased.
3. The display module according to claim 2, wherein the width of the first bending region is greater than or equal to the width of the second bending region along the second direction.
4. The display module of claim 1, wherein the display module comprises a folded state in which the first bend axis has a maximum bend radius.
5. The display module of claim 1, wherein the support film has a gradual change in elastic modulus ranging from 1 to 1011Pa。
6. The display module according to claim 5, wherein the gradient of the modulus of elasticity of the support film in the first bending region is 10 per unit length8～109Pa/mm。
7. The display module according to claim 1, wherein the support film is located on a side of the flexible display panel facing away from the light.
8. The display module according to claim 1, wherein the support film of the first bending region comprises a plurality of strip-shaped adhesive materials with different elastic moduli, and the strip-shaped adhesive materials extend along the first direction.
9. The display module of claim 1, wherein the material of the support film comprises rubber.
10. The display module according to claim 9, wherein the support film of the first bending region comprises rubber obtained by oxidation, vulcanization or fluorination.
11. The display module according to claim 9, wherein the support film of the first bending region comprises a rubber obtained by ion implantation.
12. A display device comprising the display module according to any one of claims 1 to 11.
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| CN201910380075.XA CN110058444B (en) | 2019-05-08 | 2019-05-08 | Display module and display device |
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| CN110058444B true CN110058444B (en) | 2022-04-12 |
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Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112309276B (en) * | 2019-08-01 | 2022-11-01 | 元太科技工业股份有限公司 | Display device |
| CN112711298A (en) * | 2019-10-25 | 2021-04-27 | 深圳市柔宇科技有限公司 | Flexible device and electronic equipment |
| CN114338864A (en) | 2020-09-30 | 2022-04-12 | 华为技术有限公司 | Folding device and electronic equipment |
| CN113883156A (en) | 2020-07-01 | 2022-01-04 | 华为技术有限公司 | Folding module and folding electronic equipment |
| CN114449068A (en) | 2020-10-31 | 2022-05-06 | 华为技术有限公司 | Hinge mechanism and foldable electronic equipment |
| CN113053238A (en) * | 2019-12-27 | 2021-06-29 | 华为技术有限公司 | Flexible screen and foldable equipment |
| CN111179760B (en) * | 2020-02-21 | 2022-04-15 | 京东方科技集团股份有限公司 | Display panel and bending method of display panel |
| CN115151967B (en) * | 2020-02-28 | 2024-05-10 | 住友化学株式会社 | Optical laminate and flexible image display device |
| CN111261048B (en) * | 2020-02-28 | 2021-08-31 | 武汉天马微电子有限公司 | Display device |
| CN111312079A (en) * | 2020-03-10 | 2020-06-19 | 京东方科技集团股份有限公司 | Flexible device |
| CN111415586B (en) * | 2020-03-30 | 2022-08-09 | 京东方科技集团股份有限公司 | Flexible display panel and display device |
| CN111477107A (en) * | 2020-04-20 | 2020-07-31 | Oppo广东移动通信有限公司 | Electronic device and supporting assembly thereof |
| CN117975827A (en) * | 2020-05-07 | 2024-05-03 | 京东方科技集团股份有限公司 | Support piece for display module, support assembly, display module and display device |
| CN111739423B (en) * | 2020-06-30 | 2022-05-31 | 武汉华星光电半导体显示技术有限公司 | Support film and display module |
| CN111912609B (en) * | 2020-08-11 | 2022-08-26 | 京东方科技集团股份有限公司 | Measuring device and measuring method |
| CN112102723A (en) * | 2020-09-15 | 2020-12-18 | 京东方科技集团股份有限公司 | Display module, manufacturing method thereof and display device |
| CN112002245A (en) * | 2020-09-28 | 2020-11-27 | 京东方科技集团股份有限公司 | Flexible display panel and display device |
| CN112165837B (en) * | 2020-10-13 | 2022-11-04 | 武汉华星光电半导体显示技术有限公司 | Curved surface heat dissipation film and display module |
| CN112133202B (en) * | 2020-10-16 | 2022-07-26 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display panel and flexible display device |
| CN113689787B (en) * | 2021-08-02 | 2023-02-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113593418B (en) * | 2021-08-11 | 2022-11-08 | 武汉华星光电半导体显示技术有限公司 | Display panel, manufacturing method thereof and mobile terminal |
| CN113724596B (en) * | 2021-08-30 | 2023-06-23 | 京东方科技集团股份有限公司 | Display device, display module and folding structure |
| CN115762333A (en) * | 2021-09-03 | 2023-03-07 | 华为技术有限公司 | Electronic equipment, screen supporting plate and flexible screen assembly |
| CN114783293B (en) * | 2022-04-21 | 2023-09-12 | 武汉天马微电子有限公司 | Display module and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680941A (en) * | 2013-11-28 | 2015-06-03 | 三星显示有限公司 | Flexible display device |
| CN106205383A (en) * | 2014-08-13 | 2016-12-07 | 三星显示有限公司 | There is the display device of flexible display panels |
| CN107230429A (en) * | 2017-06-08 | 2017-10-03 | 武汉天马微电子有限公司 | Flexible module and flexible display panels |
| CN107565018A (en) * | 2017-09-19 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of OLED shows backboard and preparation method thereof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969320B (en) * | 2012-12-10 | 2015-10-21 | 京东方科技集团股份有限公司 | Flexible display substrates and preparation method thereof, flexible display apparatus |
| KR102392671B1 (en) * | 2015-05-11 | 2022-04-29 | 삼성디스플레이 주식회사 | Flexible display |
| US9837634B2 (en) * | 2015-07-20 | 2017-12-05 | Apple Inc. | Electronic device display with multi-layer flexible encapsulation |
| CN204965932U (en) * | 2015-09-29 | 2016-01-13 | 京东方科技集团股份有限公司 | Support backplate and curved surface display |
| KR101797728B1 (en) * | 2016-03-11 | 2017-11-16 | 삼성디스플레이 주식회사 | Display apparatus |
| CN206400960U (en) * | 2017-01-16 | 2017-08-11 | 上海天马微电子有限公司 | A kind of foldable flexible display panel and foldable display device |
| CN106710452A (en) * | 2017-03-24 | 2017-05-24 | 武汉华星光电技术有限公司 | Flexible display device and bent support |
| KR102456889B1 (en) * | 2017-11-01 | 2022-10-21 | 엘지전자 주식회사 | Flexible frame and flexible display unit having the same |
| CN108615821B (en) * | 2018-04-28 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | Flexible cover plate of display panel |
| CN109087586B (en) * | 2018-07-18 | 2021-05-18 | 广州国显科技有限公司 | Display device and flexible display panel thereof |
| CN109671363B (en) * | 2018-12-05 | 2020-10-16 | 武汉华星光电半导体显示技术有限公司 | Protection cover plate and flexible display device |
| CN109473046B (en) * | 2018-12-18 | 2020-04-28 | 武汉华星光电半导体显示技术有限公司 | Optical cement and display panel |
| CN109728057A (en) * | 2019-01-03 | 2019-05-07 | 上海天马微电子有限公司 | Flexible display panels and display device |
-
2019
- 2019-05-08 CN CN201910380075.XA patent/CN110058444B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680941A (en) * | 2013-11-28 | 2015-06-03 | 三星显示有限公司 | Flexible display device |
| CN106205383A (en) * | 2014-08-13 | 2016-12-07 | 三星显示有限公司 | There is the display device of flexible display panels |
| CN107230429A (en) * | 2017-06-08 | 2017-10-03 | 武汉天马微电子有限公司 | Flexible module and flexible display panels |
| CN107565018A (en) * | 2017-09-19 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of OLED shows backboard and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN110058444A (en) | 2019-07-26 |
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