CN108281466A - Rollable display module and rollable display device - Google Patents
Rollable display module and rollable display device Download PDFInfo
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- CN108281466A CN108281466A CN201810052523.9A CN201810052523A CN108281466A CN 108281466 A CN108281466 A CN 108281466A CN 201810052523 A CN201810052523 A CN 201810052523A CN 108281466 A CN108281466 A CN 108281466A
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- display module
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a rollable display module and a rollable display device. The rollable display module comprises: a flexible display panel including a flexible substrate and a display device layer on the flexible substrate; the gravity layer is positioned on one side of the flexible substrate, which is far away from the display device layer; wherein the density of the gravity layer is greater than the density of the flexible display panel. Gravity layer density is big, weight is big, when the display module assembly that can curl expandes the state, the gravity layer can keep good flat state, the gravity layer can apply the effort of perpendicular to flexible display panel face direction to flexible display panel because self gravity, make flexible display panel keep flat state, prevent that the frivolous flexible display panel of weight from taking place freely to curl owing to the inertia that the state of curling produced, guarantee the stability of expansion state, avoided flexible display panel to take place to curl or reach the limit of buckling and damage, improve the performance stability of the display module assembly that can curl.
Description
Technical field
The present invention relates to display technology fields, are filled more particularly, to a kind of rollable display module and rollable display
It sets.
Background technology
With application of the display technology in intelligently wearing and other portable electronic devices, display in the prior art
Device, not only pursues the display effects such as high-resolution, high contrast, high screen accounting, at the same to the shape of display device there has also been
Diversified requirement, such as special-shaped display panel, rollable display panel etc..Rollable display panel is a kind of Flexible Displays
Panel, following Flexible Displays will develop towards foldable, rollable direction.It is appreciated that the thickness of flexible display panels is got over
Bao Yue is easy to implement foldable and rollable, develops toward ultra-thin direction so the thickness of flexible display panels is inevitable.
For ultra-thin flexible display panels, flexible display panels are when unfolded state is used to show, due to curling
Inertia, either outer force effect is easy to happen curling or folding, even more than the bending pole of flexible display panels to itself stress
Limit causes the damage of flexible display panels, influences the performance of flexible display panels.
Therefore it provides a kind of rollable display module and rollable display device, in flexible display panels unfolded state
It is not likely to produce curling, the stability for improving rollable display module is this field urgent problem to be solved.
Invention content
In view of this, the present invention provides a kind of rollable display module and rollable display device, solving raising can
The technical issues of crimping the stability of display module.
In a first aspect, in order to solve the above-mentioned technical problem, the present invention proposes a kind of rollable display module, including：
Flexible display panels, flexible display panels include flexible base board and the display device layer on flexible base board；
Gravitational bed is located at flexible base board far from display device layer side；
Wherein, the density of gravitational bed is more than the density of flexible display panels.
Second aspect, in order to solve the above-mentioned technical problem, the present invention propose a kind of rollable display device, including the present invention
Any one the rollable display module proposed.
Compared with prior art, rollable display module of the invention and rollable display device, realizing following has
Beneficial effect：
Weight is arranged in the lower section of flexible display panels in rollable display module provided by the invention and rollable display device
Power layer, the density of gravitational bed are more than the density of flexible display panels.In flexible display panels unfolded state, gravitational bed density
Greatly, then weight is big, and gravitational bed itself is not easy freely to crimp due to curling inertia generation, and gravitational bed can keep good open and flat shape
State, and the gravitational bed in flattened state can apply perpendicular to Flexible Displays flexible display panels due to self gravitation effect
The active force of panel board direction all can directly be made by the active force at the position that flexible display panels are contacted with gravitational bed
With, the inertia force which can fight flexible display panels itself enables to flexible display panels to keep flattened state,
The flexible display panels for preventing weight frivolous ensure the steady of unfolded state since the inertia generation that rolled state generates freely crimps
It is qualitative, it avoids flexible display panels and curling occurs or reaches the bending limit and damages, improve the property of rollable display module
Stabilizability.Meanwhile flexible display panels unfolded state is for when showing, flexible display panels can to reach good open and flat shape
State is capable of providing good usage experience.In flexible display panels rolled state, gravitational bed is crimped in inside, is realized to soft
Property display panel support and protection, can ensure flexible display panels formed arc curling, prevent flexible display panels
Dead folding.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the film layer structure figure of rollable display module provided in an embodiment of the present invention；
Fig. 2 is a kind of optional embodiment film layer structure figure of rollable display module provided in an embodiment of the present invention；
Fig. 3 is the rolled state schematic diagram of rollable display module provided in an embodiment of the present invention；
Fig. 4 is rollable display module schematic top plan view provided in an embodiment of the present invention；
Schematic cross-sections of the Fig. 5 for rollable display module in Fig. 4 in the positions A-A '；
Fig. 6 is a kind of optional embodiment signal of rolled state of rollable display module provided in an embodiment of the present invention
Figure；
Fig. 7 is rollable display module another kind optional embodiment film layer structure figure provided in an embodiment of the present invention；
Fig. 8 is rollable a kind of optional embodiment schematic top plan view of display module provided in an embodiment of the present invention；
Fig. 9 is the vertical use state diagram of rollable display module shown in Fig. 8；
Figure 10 is rollable display module another kind optional embodiment film layer structure figure provided in an embodiment of the present invention；
Figure 11 is the rollable display module another kind optional embodiment film layer structure figure that embodiment of the present invention provides；
Figure 12 is another optional embodiment schematic top plan view of rollable display module provided in an embodiment of the present invention；
Figure 13 is rollable display module shown in Figure 12 in the schematic cross-section of the positions B-B '；
Figure 14 is rollable display device schematic diagram provided in an embodiment of the present invention.
Specific implementation mode
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that：Unless in addition having
Body illustrates that the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to the present invention
And its application or any restrictions that use.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
Fig. 1 is the film layer structure figure of rollable display module provided in an embodiment of the present invention.Fig. 2 carries for the embodiment of the present invention
A kind of optional embodiment film layer structure figure of the rollable display module supplied, Fig. 3 are provided in an embodiment of the present invention rollable
The rolled state schematic diagram of display module.
As shown in Figure 1, rollable display module includes：Flexible display panels 100, flexible display panels 100 include flexibility
Substrate 101 and the display device layer 102 on flexible base board 101；Gravitational bed 103 is located at flexible base board 101 far from display
102 side of device layer；Wherein, the density of gravitational bed 103 is more than the density of flexible display panels 100.
As shown in Fig. 2, display device layer 102 includes multiple luminescent devices 1021 in the present invention, luminescent device 1021 includes
Anode 10211, luminescent layer 10212 and the cathode 10213 stacked gradually.Luminescent device can be top emitting formula structure or bottom hair
Formula structure is penetrated, illustratively, is illustrated by taking the emitting device structure of top emitting as an example in Fig. 2.In this structure Anodic 10211
As reflecting electrode, generally use metal material makes, can by Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr or they
Mixture formed.Such as anode 10211 can include the structure of ITO-Ag-ITO (that is, tin indium oxide-silver-tin indium oxide)；
Luminescent layer 10212 can include red light emitting layer, green light emitting layer and blue light-emitting layer, however the invention is not limited thereto；Cathode
10213 be transparent electrode, may include tin indium oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) or indium oxide (In2O3)
Equal materials.The light reflection that anode can effectively emit luminescent layer 10212 improves light extraction efficiency to light emission side, is injected from anode
Hole and from cathode injected electrons in light emitting pixel layer combine to generate exciton, exciton falls on ground state from excitation state and produces
The third contact of a total solar or lunar eclipse.Luminescent device 1021 may further include hole injection layer, hole transmission layer, electronic barrier layer, hole blocking layer, electricity
One or more layers in sub- transport layer, electron injecting layer.Hole injection layer and/or hole transmission layer may be disposed at anode
Between 10211 and luminescent layer 10212.Electron injecting layer and/or electron transfer layer may be disposed at cathode 10213 and luminescent layer
Between 10212.Flexible base board 101 includes array substrate layer 1011, and array substrate layer 1011 is opened including multiple control luminescent devices
The thin film transistor (TFT) T of pass, wherein thin film transistor (TFT) T include active layer C, grid G, source S and drain D.According to the class of transistor
Type, anode 10211 can be connected with the source S of thin film transistor (TFT) T or drain D, illustratively, the anode in Fig. 2 and drain D phase
Even.Illustrate only a kind of film thin film transistor (TFT) of top gate structure in Fig. 2, the thin film transistor (TFT) of array substrate layer may be used also in the present invention
To be bottom grating structure, this will not be repeated here.Thin-film encapsulation layer 105, and thin-film package are additionally provided with above display device layer 102
Layer 105 covers display device layer 102.Thin-film encapsulation layer 105 can be the assembled package of multilayer organic film and inorganic thin film, example
Such as, can be the alternatively layered structure of organic film and inorganic thin film.Organic film is usually epoxies, phenolic, polyesters
Equal polymer materials；The materials such as silicon nitride, silicon oxynitride or metal oxide may be used in inorganic thin film.Thin-film encapsulation layer energy
Erosion of enough effective barrier water oxygens to luminescent device ensures the service life of luminescent device and very thin, has preferable bending
Or crimp property.It is also provided with up-protective layer in the upper surface of thin-film encapsulation layer 105.
As shown in figure 3, rollable display module can realize curling, gravitational bed 103, flexible base in rollable display module
Plate 101 and display device layer 102 stack setting.In rolled state, gravitational bed 103 crimps (or bending) in inside, and shows
Show that device layer 102 is crimped onto outside.Gravitational bed 103 has certain thickness, gravitational bed 103, can after curling (or bending)
So that flexible base board 101 and display device layer 102 is formed arc curling on the outside, display device layer 102 and flexible base can be avoided
Plate 101 occurs extremely to roll over, and influences the performance of rollable display module.
When being flattened again after crimping for the frivolous flexible display panels of weight, the inertia meeting of flexible display panels itself
Flexible display panels generation is caused freely to crimp.Rollable display module provided by the invention, in the lower section of flexible display panels
Gravitational bed is set, and the density of gravitational bed is more than the density of flexible display panels.In flexible display panels unfolded state, gravitational bed
Density is big, then weight is big, and gravitational bed itself is not easy freely to crimp due to curling inertia generation, and gravitational bed can keep good flat
Exhibition state, and the gravitational bed in flattened state can apply perpendicular to flexibility flexible display panels due to self gravitation effect
The active force of display panel board direction, all can be directly by the active force at the position that flexible display panels are contacted with gravitational bed
Effect, which can fight the inertia force of flexible display panels itself so that flexible display panels keep flattened state,
The flexible display panels for preventing weight frivolous ensure flexible display panels since the inertia generation that rolled state generates freely crimps
The stability of unfolded state avoids flexible display panels and curling occurs or reaches the bending limit and damages, improves rollable
The stability of display module.Meanwhile flexible display panels unfolded state is for when showing, flexible display panels can to reach
Good flattened state is capable of providing good usage experience and viewing effect.In flexible display panels rolled state, gravity
Layer is crimped in inside, realizes support and protection to flexible display panels, can ensure that flexible display panels form arc curling,
Prevent flexible display panels from dead folding occurs.
In some alternative embodiments, in rollable display module provided by the invention, flexible display panels it is close
Degree is 0.8~1.2g/cm3, the density of gravitational bed is more than or equal to 10g/cm3.In the embodiment, the density of flexible display panels
It is small, it can realize that the ultrathin of flexible display panels, the density for the gravitational bed being arranged below flexible display panels of the present invention are about
8~12.5 times of flexible display panels density, the density of gravitational bed is much larger than the density of flexible display panels, in Flexible Displays face
When plate unfolded state, the active force of gravitational bed applied to flexible display panels enables to flexible display panels to keep good
Flattened state, the flexible display panels for preventing weight frivolous ensure soft since the inertia generation that rolled state generates freely crimps
The stability of property display panel unfolded state.
The structure of gravitational bed and making material can there are many embodiments in the present invention, such as gravitational bed can be located at
A flood or gravitational bed below flexible display panels can also include multiple gravity units.The making material of gravitational bed can
With including density larger metal material or polymer material.Wherein, when gravitational bed includes polymer material, due to poly-
Closing object has soft characteristic, can increase the flexibility of gravitational bed.It below will be to gravitational bed structure and making material in the present invention
Embodiment be illustrated.
In some alternative embodiments, with reference to shown in figure 4 and Fig. 5, Fig. 4 is provided in an embodiment of the present invention rollable
Display module schematic top plan view, Fig. 5 are that rollable display module exists in Fig. 4
The schematic cross-section of the positions A-A '.As shown in figure 4, gravitational bed 103 include be arranged in order along first direction a it is multiple
Gravity unit 1031, first direction a is parallel with the plate face of flexible display panels 100, and the density of gravity unit 1031 is more than flexibility
The density of display panel 100.As shown in figure 5, gravitational bed 103 is located at flexible base board 101 far from 102 side of display device layer, weight
Power layer 103 includes multiple gravity units 1031.In the embodiment, multiple gravity are set in the lower section of flexible display panels 100
Unit 1031 ensures that flexible display panels 100 can reach good in unfolded state by the gravity of each gravity unit
Good is open and flat, is not susceptible to crimp, and ensures the stability of flexible display panels unfolded state.Simultaneously each gravity unit 1031 it
Between can be spaced apart, be equivalent to the making material for saving gravitational bed when making gravitational bed, save rollable aobvious
Show the cost of manufacture of module.Meanwhile improving the curling flexibility of rollable display module.
In the embodiment, Fig. 6 is that rolled state one kind of rollable display module provided in an embodiment of the present invention is optional
Embodiment schematic diagram, as shown in fig. 6, when rollable display module realizes curling, the axis of the curling of flexible display panels
Extending direction (also be view shown in fig. 6 in perpendicular to the direction of paper) and the of the extension of gravity unit 1031 in Fig. 4
One direction a is identical.In another scenario, when rollable display module realizes curling, the axis of the curling of flexible display panels
Extending direction can also be second direction b in Fig. 4, second direction b intersects with the extension first direction a of gravity unit 1031
Fork.
The making material of gravity unit 1031 includes metal material in the embodiment, such as the gold that tungsten, iron isodensity are big
Belong to, or includes the alloy material of the metals such as tungsten, iron.Gravity unit 1031 can only be made by single metal material, or
It is made by two kinds or two or more metal materials, or made by alloy material, the weight made of metal or alloy material
Power unit, metal or alloy material thermal conductivity performance is good, and gravity unit can be conducive to the conduction of flexible display panels heat, soft
Property display panel be in when working long hours state, remain able to distribute the heat of display device generation in time, avoid display
Part heat cannot distribute and generate damage in time, ensure that the service life of display device, improve flexible display panels performance
Stability.Also include other nonmetallic materials while the making material of gravity unit 1031 includes metal material, such as can be with
Including polymer material, metallic particles is mixed in the polymeric material or alloying pellet forms gravitational bed.
Fig. 7 is rollable display module another kind optional embodiment film layer structure figure provided in an embodiment of the present invention, such as
Shown in Fig. 7, gravitational bed 103 includes multiple gravity units 1031, the making material of gravity unit 1031 include polymer material J and
Metallic particles M in the embodiment, is equivalent to the larger metallic particles of doping density in the polymeric material and forms gravitational bed
Structure.Wherein, polymer material can be that thin-film materials, the metallic particles such as polyester, polyethylene, optical cement or pressure sensitive adhesive can
Think the particle of tungsten, the big metal or metal alloy of iron isodensity.In the embodiment, by adulterating gold in the polymeric material
Metal particles make gravitational bed so that the density of gravitational bed is more than the density of flexible display panels, ensures in rollable display module
In unfolded state, flexible display panels can keep good flat by the gravity of gravitational bed.The embodiment party
Gravitational bed is made by doping metals particle in the polymeric material in formula, polymer material has soft characteristic, Neng Gouzeng
The flexibility of big gravitational bed, and then enhance the flexibility of rollable display module entirety.In addition, by adulterating gold in the polymeric material
Metal particles, which make gravitational bed, will not increase the thickness of rollable display module, make the flexibility of rollable display device further
It is promoted.Meanwhile incorporation metal or alloy particle forms gravitational bed, metal or alloy material thermal conductivity performance in the polymeric material
Good, gravitational bed can be conducive to the conduction of flexible display panels heat, and flexible display panels are in when working long hours state, still
The heat that display device generation can so be distributed in time, avoids display device heat that from cannot distributing in time and generate damage, ensures
The service life of display device, improves flexible display panels stability.In addition, since metal or metallic particles ooze
Enter in the polymeric material, polymer has lower elasticity modulus, has stronger impact resistance, can be effectively protected
Flexible display panels prevent it from arriving external injury.Optionally, can also wrap away from the side of display device layer in flexible base board
Containing lower protective film, lower protective film can be fitted in the surface of flexible base board by optical cement or pressure sensitive adhesive, due to optical cement or
Person's pressure sensitive adhesive is easy to happen creep in bending or curling, influences its recoverability, is penetrated into optical cement or pressure sensitive adhesive
Either metallic particles making gravitational bed can be effectively improved the recoverability of optical cement or pressure sensitive adhesive to metal, improve its bending resistance
Folding or crimp property.
Further, in some alternative embodiments, Fig. 8 is rollable display module provided in an embodiment of the present invention
A kind of optional embodiment schematic top plan view, as shown in figure 8, being provided between two adjacent gravity units 1031 at least one
The both ends of interconnecting piece 1032, interconnecting piece 1032 are connected with two gravity units 1031 respectively, and the tensile strength of interconnecting piece 1032 is big
In the tensile strength of flexible display panels.In the present invention at least one connection is provided between two adjacent gravity units
Portion, Fig. 7 show the case where being provided with multiple interconnecting pieces between two adjacent gravity units.Interconnecting piece can have certain
Width or interconnecting piece and or linearly connected portion.
Fig. 9 is the vertical use state diagram of rollable display module shown in Fig. 8.It is as schemed in rollable display module
Shown in 9 when plumbness, display module integrally can be by downward stretching action, since the density of gravity unit is big due to gravity
It is relatively large in the quality of the density of flexible display panels, gravity unit, it is flexible between two neighbouring gravity units
Display panel areas may be locally stretched due to the gravity of the gravity unit of lower section, be may result in when serious soft
Property display panel in the middle part of intraphase conductor fracture or device it is impaired.As flexible display panels region R1 can be one by lower section in Fig. 9
The gravity of gravity unit 1031, it is more up soft between two adjacent gravity units along vertically upward direction d
The gravity that property display panel areas is born is bigger, most upper in fig.9 only for five gravity units are arranged in Fig. 9 altogether
The flexible display panels region R2 of side can be by the gravity of the four gravity units 1031 in lower section.In adjacent weight in the present invention
Interconnecting piece 1032 is set between power unit 1031, and the tensile strength of interconnecting piece 1032 is strong more than the stretching of flexible display panels 100
Degree, when ensureing that rollable display module is in hang, interconnecting piece bears the gravity list of lower section as main force part
The gravity stretching action of member, to reduce the gravity that the flexible display panels region between two adjacent gravity units is born
Stretching action avoids flexible display panels and is damaged by gravity stretching action, ensure that the stability of rollable display module.
In some alternative embodiments, Figure 10 is that rollable display module another kind provided in an embodiment of the present invention can
Embodiment film layer structure figure is selected, as shown in Figure 10, rollable display module includes：Flexible display panels 100, Flexible Displays face
Plate 100 includes flexible base board 101 and display device layer 102；Gravitational bed 103 is located at flexible base board 101 far from display device layer 102
Side；The density of gravitational bed 103 is more than the density of flexible display panels 100.Gravitational bed 103 is a flood, rollable display mould
Group further includes lower protective film 104, and lower protective film 104 is located at gravitational bed 103 far from 101 side of flexible base board.In the embodiment,
Gravitational bed is a flood, ensure that rollable display module is uniform in overall film thickness in flat, rollable aobvious
Show that modular structure stability is good.Lower protective film is set in the embodiment simultaneously, ensures rollable display module in flat
It is lower in use, lower protective film can reduce impact of the external force away from flexible display panels display surface side to flexible display panels
Effect, ensures rollable display module mechanical stability.
The making material of gravitational bed 103 includes metal material in the embodiment, such as the metal that tungsten, iron isodensity are big,
Or include the alloy material of the metals such as tungsten, iron.Also include other materials while gravitational bed 103 includes metal material, such as
Polymer material, Figure 11 are the rollable module another kind optional embodiment film layer structure figure that embodiment of the present invention provides,
As shown in figure 11, the larger metallic particles M of doping density forms the structure of gravitational bed 103, gravitational bed in polymer material J
103 making material includes polymer material J and metallic particles M, wherein polymer material can be polyester, polyethylene, optics
The thin-film materials such as glue or pressure sensitive adhesive, metallic particles can be the particle of tungsten, the big metal of iron isodensity.In the embodiment,
Gravitational bed is made by doping metals particle in the polymeric material so that the density of gravitational bed is more than the close of flexible display panels
Degree, ensures when rollable display module is in unfolded state, flexible display panels can be kept by the gravity of gravitational bed
Good flat.Polymer material has soft characteristic simultaneously, can increase the flexibility of gravitational bed, and then enhances and can roll up
The flexibility of bent display module entirety.In the embodiment, gravitational bed can be conducive to the conduction of flexible display panels heat, flexible
Display panel is in when working long hours state, is remained able to distribute the heat of display device generation in time, is avoided display device
Heat cannot distribute and generate damage in time, ensure that the service life of display device, and it is steady to improve flexible display panels performance
It is qualitative.
In some alternative embodiments, gravitational bed at least is set at the both ends of flexible display panels, wherein both ends point
Initiating terminal that Wei be along winding direction and end.Figure 12 is that the another kind of rollable display module provided in an embodiment of the present invention can
It is schematic cross-section of the rollable display module shown in Figure 12 in the positions B-B ' to select embodiment schematic top plan view, Figure 13, simultaneously
With reference to as shown in Figure 12 and Figure 13, gravitational bed 103 only is set at the both ends of flexible display panels 100, both ends are respectively along winding
When the initiating terminal Q1 and end Q2 in direction namely rollable display module wind state, the extending direction of axis is crimped as Figure 12 institutes
In the embodiment, gravitational bed only is arranged along the initiating terminal in winding direction and end in flexible display panels in the direction c shown, soft
For property display panel in flat, the gravitational bed being arranged in initiating terminal and end can be respectively to initiating terminal and the end ends Liang Ge
Apply the active force of vertical flexible display panels board direction, which can fight the inertia of flexible display panels itself
Power so that two ends of flexible display panels, which will not occur to tilt due to the inertia of rolled state, even drives Flexible Displays
Panel integrally crimps, and flexible display panels can keep good flattened state.The making material of gravitational bed in the embodiment
It can be metal or alloy, metallic particles or alloying pellet are either added in the polymeric material.
It should be noted that for the embodiment present invention for the metallic particles adulterated in polymer material size,
Doping ratio does not limit, and the big metallic particles of doping density makes the density of gravitational bed be more than flexibility in the polymeric material
The density of display panel, so that gravitational bed plays the role of the design for preventing flexible display panels from freely crimping in this hair
Within the scope of bright protection.
The present invention also provides a kind of rollable display devices, including the rollable display mould that any embodiment of the present invention provides
Group.Figure 14 is rollable display device schematic diagram provided in an embodiment of the present invention.Rollable display device provided by the invention,
Gravitational bed is arranged in the lower section of flexible display panels, and the density of gravitational bed is more than the density of flexible display panels.In Flexible Displays face
When plate unfolded state, gravitational bed density is big, then weight is big, and gravitational bed itself is not easy freely to crimp due to curling inertia generation, weight
Power layer can keep good flattened state, and the gravitational bed in flattened state can be aobvious to flexibility due to self gravitation effect
Show that panel applies the active force perpendicular to flexible display panels board direction, at the position that flexible display panels are contacted with gravitational bed
It will directly be acted on by the active force, which can fight the inertia force of flexible display panels itself, this can make
It obtains flexible display panels and keeps flattened state, the inertia hair that the flexible display panels for preventing weight frivolous are generated due to rolled state
Be born from by crimping, ensure the stability of unfolded state, avoid flexible display panels curling occurs or reach the bending limit and
Damage, improves the stability of rollable display device.
By above-described embodiment it is found that the rollable display module and rollable display device of the present invention, have reached as follows
Advantageous effect：
Weight is arranged in the lower section of flexible display panels in rollable display module provided by the invention and rollable display device
Power layer, the density of gravitational bed are more than the density of flexible display panels.In flexible display panels unfolded state, gravitational bed density
Greatly, then weight is big, and gravitational bed itself is not easy freely to crimp due to curling inertia generation, and gravitational bed can keep good open and flat shape
State, and the gravitational bed in flattened state can apply perpendicular to Flexible Displays flexible display panels due to self gravitation effect
The active force of panel board direction all can directly be made by the active force at the position that flexible display panels are contacted with gravitational bed
With, which can fight the inertia force of flexible display panels itself, and flexible display panels is enabled to keep flattened state,
The flexible display panels for preventing weight frivolous ensure the steady of unfolded state since the inertia generation that rolled state generates freely crimps
It is qualitative, it avoids flexible display panels and curling occurs or reaches the bending limit and damages, improve the property of rollable display module
Stabilizability.Meanwhile flexible display panels unfolded state is for when showing, flexible display panels can to reach good open and flat shape
State is capable of providing good usage experience and viewing effect.In flexible display panels rolled state, gravitational bed is rolled up in inside
Song realizes support and protection to flexible display panels, can ensure that flexible display panels form arc curling, prevents flexible aobvious
Show that dead folding occurs for panel.
Although some specific embodiments of the present invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to illustrating, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above example.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of rollable display module, which is characterized in that including：
Flexible display panels, the flexible display panels include flexible base board, the display device on the flexible base board
Layer and on the display device layer and the thin-film encapsulation layer of the covering display device layer；
Gravitational bed is located at the flexible base board far from display device layer side；
Wherein, the density of the gravitational bed is more than the density of the flexible display panels.
2. rollable display module according to claim 1, which is characterized in that
The gravitational bed includes the multiple gravity units being arranged in order along first direction, the first direction and the Flexible Displays
The plate face of panel is parallel.
3. rollable display module according to claim 2, which is characterized in that
Be provided at least one interconnecting piece between two adjacent gravity units, the both ends of the interconnecting piece respectively with two
The gravity unit is connected, and the tensile strength of the interconnecting piece is more than the tensile strength of the flexible display panels.
4. rollable display module according to claim 1, which is characterized in that
The gravitational bed is a flood,
The rollable display module further includes lower protective film, and the lower protective film is located at the gravitational bed far from the flexible base
Plate side.
5. rollable display module according to claim 1, which is characterized in that
The making material of the gravitational bed includes tungsten or iron.
6. rollable display module according to claim 1, which is characterized in that
The making material of the gravitational bed includes polymer material, wherein includes metallic particles in the polymer material.
7. rollable display module according to claim 6, which is characterized in that
The polymer material includes polyester, polyethylene, optical cement or pressure sensitive adhesive.
8. rollable display module according to claim 1, which is characterized in that
Gravitational bed at least is set at the both ends of the flexible display panels, wherein the both ends are respectively rising along winding direction
Beginning and end.
9. rollable display module according to claim 1, which is characterized in that
The density of the flexible display panels is 0.8~1.2g/cm3, the density of the gravitational bed is more than or equal to 10g/cm3。
10. a kind of rollable display device, which is characterized in that including the rollable display mould of claim 1 to 9 any one of them
Group.
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| CN112967609A (en) * | 2021-03-15 | 2021-06-15 | 上海天马微电子有限公司 | Rollable display device |
| CN114973963A (en) * | 2022-06-16 | 2022-08-30 | 昆山国显光电有限公司 | Rollable display module and rollable display device |
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| CN108281466B (en) | 2020-11-20 |
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