CN109375422A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN109375422A CN109375422A CN201811582053.3A CN201811582053A CN109375422A CN 109375422 A CN109375422 A CN 109375422A CN 201811582053 A CN201811582053 A CN 201811582053A CN 109375422 A CN109375422 A CN 109375422A
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/22—Antistatic materials or arrangements
Abstract
The invention discloses a kind of backlight module and display devices, are related to field of display technology, comprising: backboard, including substrate and the extension being connected with substrate, plane intersection where plane where substrate and extension, substrate and extension form an accommodating space；Substrate is located in accommodating space, substrate is arranged in close to the side of the light-emitting surface of backlight module；Side of the substrate far from substrate is arranged in electro-magnetic screen layer；Driving function layer, the side positioned at electro-magnetic screen layer far from substrate；Multiple LED are electrically connected with driving function layer, and are set to side of the driving function layer far from substrate.By introducing electro-magnetic screen layer, influence of the external electromagnetic signal to driving function layer can be effectively shielded, is conducive to the display brightness homogeneity for promoting LED, promotes the display effect of display device.
Description
Technical field
The present invention relates to field of display technology, more particularly, to a kind of backlight module and display device.
Background technique
As the important component of liquid crystal display, backlight module generallys use light emitting diode (Light Emitting
Diode, LED) it is used as light source, there is relatively thin thickness using the backlight module of LED light source, can effectively reduce entire liquid crystal display
The thickness of device, moreover, the backlight module using LED light source also has lower energy consumption, therefore, using LED as the backlight of light source
Mould group is widely applied.
Currently, application permeability of the LED as backlight in field of liquid crystal panel display alreadys exceed 90%.Backlight mould
Group framework mainly has side entering type and two kinds of straight-down negative, and side entering-type LED backlight mould group is that LED light source is arranged in the side of light guide plate
Face, after the light that LED is projected enters light guide plate, by reflector plate, the reflection of site and scattering by light-output.Direct-light type LED backlight
Source mould group is that LED light source is arranged in the underface of LCD display, and the light that LED chip projects is irradiated on LCD display,
To realize the effect illuminated to liquid crystal display device.
LED in backlight module is usually to be driven by driving circuit luminous, which usually will receive the external world
There are the bad phenomenons such as brightness disproportionation or flashing so as to cause LED in the interference of electromagnetic signal.
Summary of the invention
In view of this, drawing between driving function layer and substrate the present invention provides a kind of backlight module and display device
Entering electro-magnetic screen layer, the introducing of the electro-magnetic screen layer can effectively shield influence of the external electromagnetic signal to driving function layer,
The display brightness homogeneity for being thus conducive to be promoted LED, advantageously reduce LED occur that brightness disproportionation or flashing etc. are undesirable can
Can, and then be conducive to be promoted the display effect of display device.
In a first aspect, the application provides a kind of backlight module, comprising:
Backboard is flat where plane where the substrate and the extension including substrate and the extension being connected with substrate
Face intersection, the substrate and the extension form an accommodating space；
Substrate is located in the accommodating space, the substrate is arranged in close to the side of the light-emitting surface of the backlight module；
Side of the substrate far from the substrate is arranged in electro-magnetic screen layer；
Driving function layer, the side positioned at the electro-magnetic screen layer far from the substrate；
Multiple LED are electrically connected with the driving function layer, and are set to one of the driving function layer far from the substrate
Side.
Second aspect, the application provide a kind of display device, including backlight module, which is provided herein
Backlight module.
Compared with prior art, backlight module provided by the invention and display device at least realize following beneficial effect
Fruit:
In backlight module and display device provided herein, electromagnetic screen is introduced between substrate and driving function layer
Layer is covered, is equivalent to and driving function layer is isolated with the environment of one side of substrate by the electro-magnetic screen layer, the electromagnetic shielding
Layer can effectively stop the electromagnetic signal of one side of substrate to enter in driving function layer, to be conducive to reduce electromagnetic signal to driving
It influences caused by functional layer, so that LED drive current stablizes output, thus is conducive to be promoted the display brightness homogeneity of LED, has
There is the undesirable possibility such as brightness disproportionation or flashing conducive to LED is reduced, and then be conducive to be promoted the display homogeneity of display device,
Promote the display effect of display device.
Certainly, implementing any of the products of the present invention specific needs while must not reach all the above technical effect.
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.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 show a kind of top view of backlight module provided by the embodiment of the present application；
Fig. 2 show a kind of sectional view of the backlight module provided by Fig. 1 along AA '；
Fig. 3 show another sectional view of the backlight module provided by Fig. 1 along AA '；
Fig. 4 show a kind of light path schematic diagram of backlight module provided by the embodiment of the present application；
Fig. 5 show another sectional view of the backlight module provided by Fig. 1 along AA '；
Fig. 6 is shown and a kind of circuit structure diagram of the LED driving circuit being electrically connected；
Fig. 7 show a kind of sectional view of the backlight module provided by Fig. 1 along BB '；
Fig. 8 is a kind of structure chart of display device provided by the embodiment of the present application；
Fig. 9 show a kind of sectional view of display device provided by the embodiment of the present application.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, 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.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
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.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Currently, application permeability of the LED as backlight in field of liquid crystal panel display alreadys exceed 90%.Backlight mould
Group framework mainly has side entering type and two kinds of straight-down negative, and side entering-type LED backlight mould group is that LED light source is arranged in the side of light guide plate
Face, after the light that LED is projected enters light guide plate, by reflector plate, the reflection of site and scattering by light-output.Direct-light type LED backlight
Source mould group is that LED light source is arranged in the underface of LCD display, and the light that LED chip projects is irradiated on LCD display,
To realize the effect illuminated to liquid crystal display device.
LED in backlight module is usually to be driven by driving circuit luminous, which usually will receive the external world
There are the bad phenomenons such as brightness disproportionation or flashing so as to cause LED in the interference of electromagnetic signal.
In view of this, drawing between driving function layer and substrate the present invention provides a kind of backlight module and display device
Entering electro-magnetic screen layer, the introducing of the electro-magnetic screen layer can effectively shield influence of the external electromagnetic signal to driving function layer,
The display brightness homogeneity for being thus conducive to be promoted LED, advantageously reduce LED occur that brightness disproportionation or flashing etc. are undesirable can
Can, and then be conducive to be promoted the display effect of display device.
The application provides a kind of backlight module, comprising:
Backboard, including substrate and the extension being connected with substrate, plane intersection, base where plane where substrate and extension
Bottom and extension form an accommodating space；
Substrate is located in accommodating space, substrate is arranged in close to the side of the light-emitting surface of backlight module；
Side of the substrate far from substrate is arranged in electro-magnetic screen layer；
Driving function layer, the side positioned at electro-magnetic screen layer far from substrate；
Multiple LED are electrically connected with driving function layer, and are set to side of the driving function layer far from substrate.
It is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 show a kind of top view of backlight module provided by the embodiment of the present application, and Fig. 2 show Fig. 1 and provided
Backlight module along AA ' a kind of sectional view, referring to Figure 1 and Fig. 2, in backlight module 100 provided by the embodiment of the present application,
Backboard 10 includes substrate 11 and the extension 12 being connected with the substrate 11, and substrate 11 and extension 12 form an accommodating space 80,
Substrate 20 is disposed with along the direction perpendicular to 11 place plane of substrate in the accommodating space 80, electro-magnetic screen layer 30, is driven
Dynamic functional layer 40 and multiple LED 50, driving function layer 40 are electrically connected with multiple LED 50, for driving LED 50 to shine.Especially
It is that the application introduces electro-magnetic screen layer 30 between driving function layer 40 and substrate 20, the electro-magnetic screen layer 30 is in backlight mould
Isolation barrier is formed in group 100, the electromagnetic signal of 20 side of substrate is shielded, electromagnetic signal can be blocked from substrate 20 1
Side enters the transmission path of driving function layer 40, thus be conducive to reduce electromagnetic signal to influence caused by driving function layer 40,
Driving function layer 40 is enabled to be that LED 50 provides relatively stable driving current, thus is conducive to be promoted the display of LED 50
Brightness homogeneity advantageously reduces LED 50 and the undesirable possibility such as brightness disproportionation or flashing occurs, enables backlight module 100
More uniform light is provided for display panel 200, and then is conducive to be promoted the display homogeneity of display device 300, is promoted aobvious
The display effect of showing device 300.
Optionally, in backlight module 100 provided by the embodiment of the present application, electro-magnetic screen layer 30 is conductive layer, conductive layer
Resistance value be R, wherein the Ω of R≤1000.
Specifically, as resistance value R 1000 Ω of > of conductive layer, electro-magnetic screen layer is bad to the shield effectiveness of electromagnetic signal,
The resistance value of conductive layer is smaller, and the effect of electromagnetic shielding is better, and resistance value is used in backlight module 100 provided by the embodiment of the present application
For the Ω of R≤1000 conductive layer as electro-magnetic screen layer 30 when, which can preferably shield electromagnetic signal, greatly
Big reduce from 11 side of substrate enters the amount of the electromagnetic signal in driving function layer 40, thus is conducive to reduce electromagnetic signal to drive
The influence of dynamic functional layer 40, can export stable driving current to LED 50.
Optionally, Fig. 2 is referred to, in backlight module 100 provided by the embodiment of the present application, the thickness of electro-magnetic screen layer 30
For D1, wherein 50nm≤D1≤100nm.
Specifically, the application by the thickness design of electro-magnetic screen layer 30 be D1 >=50nm when, enable to electro-magnetic screen layer
30 thickness is unlikely to lead to the phenomenon that being broken due to too thin, and such thickness design of electro-magnetic screen layer 30 is advantageous
In the integrity for keeping electro-magnetic screen layer 30 in the production of backlight module 100 and use process；Meanwhile the application will be electromagnetically shielded
The thickness design of layer 30 is D1≤100nm, so that the thickness of electro-magnetic screen layer 30 is unlikely to too thick, to make electro-magnetic screen layer 30
Introducing the integral thickness of backlight module 100 will not be influenced too much.
Optionally, Fig. 2 is referred to, in backlight module 100 provided by the embodiment of the present application, the thickness of electro-magnetic screen layer 30
For D1, wherein 50nm≤D1≤60nm.
Specifically, the application by the thickness design of electro-magnetic screen layer 30 be D1 >=50nm when, enable to electro-magnetic screen layer
30 thickness is unlikely to lead to the phenomenon that being broken due to too thin, and such thickness design of electro-magnetic screen layer 30 is advantageous
In the integrity for keeping electro-magnetic screen layer 30 in the production of backlight module 100 and use process；Meanwhile the application will be electromagnetically shielded
The thickness design of layer 30 is D1≤60nm, so that the thinner thickness of electro-magnetic screen layer 30, which is both able to satisfy electro-magnetic screen layer
The demand that 30 pairs of signals are shielded, greatly reduces the electromagnetic signal of 11 side of substrate to interference caused by driving function layer 40,
It is able to satisfy the slimming demand of backlight module 100 again, and then is conducive to the slimming demand for meeting display device 300.
Optionally, Fig. 3 is referred to, Fig. 3 show another sectional view of the backlight module provided by Fig. 1 along AA ', the back
Optical mode group 100 further includes reflecting layer 60, and reflecting layer 60 is between substrate 11 and substrate 20.Specifically, due to being penetrated from LED 50
It can not all be projected to the light of the light-emitting surface of backlight module 100 by light-emitting surface, some light will be reflected back, this
After application introduces reflecting layer 60 between substrate 11 and substrate 20, which can be played this some light further
Reflex refers to Fig. 4, and Fig. 4 show a kind of light path schematic diagram of backlight module 100 provided by the embodiment of the present application,
This some light is reflected towards the light-emitting surface of backlight module 100 by reflecting layer 60, to be conducive to promote the light that LED 50 is issued
Effective rate of utilization, and then be conducive to promoted backlight module 100 overall brightness.Multilayer polester film can be used in above-mentioned reflecting layer 60
Composite construction, such as enhancing specular reflection film ESR (Enhanced Specular Reflector), the reflectance coating are that have to make
It is multi-layer film structure made of raw material with PET system resin, is the optics for having very high reflectivity in visible wavelength range
Film, to be conducive to reliably promote reflectivity of 60 groups of the reflecting layer to light, to be conducive to further promote 50 lamp of LED
Light utilization.
Optionally, continuing with referring to fig. 4, introduced electromagnetic screen in backlight module 100 provided by the embodiment of the present application
Covering layer 30 is transparency conducting layer.Specifically, when using transparency conducting layer as electro-magnetic screen layer 30,50 directive backlight mould of LED
The light for not projecting but being reflected back from the light-emitting surface in the light of the light-emitting surface of group 100 will smoothly penetrate this thoroughly
Bright conductive layer and directive is located at transparency conducting layer close to the reflecting layer 60 of 11 side of substrate, therefore, electro-magnetic screen layer 30 is designed
When for transparency conducting layer, be conducive to the amount for increasing the light in directive reflecting layer 60, and then be conducive to be promoted via reflector plate directive
The amount of the light of the light-emitting surface of backlight module 100, therefore be more conducive to promoting the effective rate of utilization for the light that LED 50 is issued,
Be conducive to be promoted the overall brightness of backlight module 100.
Optionally, Fig. 5 is referred to, Fig. 5 show another sectional view of the backlight module provided by Fig. 1 along AA ', the reality
It applies in example, electro-magnetic screen layer 30 is metal layer 31, and metal layer 31 is multiplexed with reflecting layer 32.Specifically, in embodiment illustrated in fig. 5,
One layer of metal layer 31 is introduced between substrate 20 and driving function layer 40, which has shielding electromagnetic signal interference
Function can be used as the use of electro-magnetic screen layer 30, to shield the electromagnetic signal of 11 side of substrate, reduce electromagnetic signal to driving function
The interference of ergosphere 40；Meanwhile it is reflecting layer 32, the light-emitting surface of 50 directive backlight module 100 of LED that the metal layer 31, which goes back reusable,
Light in do not project from the light-emitting surface but the light that is reflected back, can further reflex to backlight by the metal layer 31
The light-emitting surface of mould group 100, and then be conducive to be promoted the effective rate of utilization for the light that LED 50 is issued.Back provided herein
In optical mode group 100, introducing between substrate 20 and driving function layer 40 can either can be used as instead as electro-magnetic screen layer 30
The metal layer for penetrating layer 32 is equivalent to and is integrated the electro-magnetic screen function of backlight module 100 and reflection function, thus favorably
In the film layer structure for simplifying backlight module 100, be conducive to the slimming demand for meeting backlight module 100, while also helping letter
Change the production process of backlight module 100, promotes the production efficiency of backlight module 100.
Optionally, in backlight module 100 provided by the embodiment of the present application, driving function layer 40 includes multiple driving electricity
Road, driving circuit are electrically connected with LED 50, and driving circuit includes at least one thin film transistor (TFT) and at least one storage capacitance.
Specifically, Fig. 6 is referred to, Fig. 6 is shown and a kind of circuit structure of a LED 50 driving circuit being electrically connected
Scheme, in the embodiment, driving circuit includes two thin film transistor (TFT)s and a storage capacitance, and two thin film transistor (TFT)s are respectively to drive
Dynamic thin film transistor (TFT) 62 and switching thin-film transistor 61.The grid of switching thin-film transistor 61 is electrically connected with grid line 41, source electrode
Be electrically connected with data line 42, drain electrode with driving thin film transistor (TFT) 62 grid be electrically connected, driving thin film transistor (TFT) 62 grid and
Storage capacitance C1 is additionally provided between power supply line 44；The source electrode electric connection of power supply line 44 of thin film transistor (TFT) 62 is driven, film is driven
The drain electrode of transistor 62 is electrically connected LED 50.Supply voltage is supplied to LED 50 by power supply line 44.
In embodiment illustrated in fig. 6, when switching thin-film transistor 61 is connected in the gating signal applied by grid line 41,
Data-signal from data line 42 is applied to the grid and storage capacitance C1 of driving thin film transistor (TFT) 62.When data-signal makes
When thin film transistor (TFT) 62 being driven to be connected, electric current is supplied to LED 50 from power supply line 44, and LED 50 is made to shine.Storage capacitance C1 is used
In the voltage for the grid for maintaining driving thin film transistor (TFT) 62 when switching thin-film transistor 61 ends.Therefore, even if switch film
Transistor 61 ends, and can also maintain the level for being applied to the electric current of LED 50 from power supply line 44 up to next frame.
It should be noted that Fig. 6 is illustrated only in backlight module 100 provided by the embodiment of the present application to drive LED
The driving of other structures also can be used in some other embodiment of the application in a kind of structure of 50 luminous driving circuits
Circuit come drive LED 50 shine, the application is to this without specifically limiting.
Optionally, Fig. 7 is referred to, Fig. 7 show a kind of sectional view of the backlight module provided by Fig. 1 along BB ', the section
Driving function layer 40 is refined in figure, driving function layer 40 further includes active layer 70, the first gold medal by insulator separation
Belong to layer 71, second metal layer 72 and electrode layer 90, active layer 70,90 edge of the first metal layer 71, second metal layer 72 and electrode layer
Perpendicular to the direction of 20 place plane of substrate, side of the electro-magnetic screen layer 30 far from substrate 20 is set；
Storage capacitance is formed between the first metal layer 71 and active layer 70；Thin film transistor (TFT) includes being located at the first metal layer 71
Grid and source electrode and drain electrode positioned at second metal layer 72.
Specifically, Fig. 7 is referred to, this example show the one of driving function layer 40 corresponding with driving circuit in Fig. 6
Kind sectional view, is disposed with active layer 70, the first metal layer 71 and second metal layer far from the side of substrate 11 in substrate 20
72, drive the grid of thin film transistor (TFT) 62 and switching thin-film transistor 61 to be respectively positioned on the first metal layer 71, the equal position of source electrode and drain electrode
In second metal layer 72；Storage capacitance is formed by the first metal layer 71 and active layer 70 being oppositely arranged；In second metal layer 72
Side far from substrate 20 is additionally provided with electrode layer 90, and LED 50 is electrically connected with the electrode layer 90.As can be seen from Figure 7, it drives thin
The connection relationship in connection relationship and Fig. 6 between film transistor 62, switching thin-film transistor 61, storage capacitance and LED 50
It is identical.When switching thin-film transistor 61 is connected, the data-signal from data line is applied to driving thin film transistor (TFT) 62
Grid and storage capacitance C1.When data-signal makes that thin film transistor (TFT) 62 is driven to be connected, electric current is supplied to from power supply line 44
LED 50 makes LED 50 shine.
Optionally, the first metal layer 71 in backlight module 100 provided by the embodiment of the present application, in driving function layer 40
Side positioned at active layer 70 far from substrate 20, alternatively, the first metal layer 71 is located at active layer 70 close to the side of substrate 20.
Specifically, thin film transistor (TFT) has two kinds of structures of top-gated and bottom gate, when to be located at active layer 70 separate for the first metal layer 71
When the side of substrate 20, it is presented as top gate structure, refers to and drive thin film transistor (TFT) 62 and switching thin-film transistor 61 in Fig. 7
Structure；In some other embodiment, the first metal layer 71 may be additionally located at active layer 70 close to the side of substrate 20, be presented as bottom
Grid structure, the application is to this without specifically limiting.
Optionally, continuing with referring to Fig. 7, in backlight module 100 provided by the embodiment of the present application, driving function layer 40 is also
Including the first electrode 91 and second electrode 92 for being located at electrode layer 90 and being electrically connected with LED 50, first electrode 91 is common electrical
Pole, second electrode 92 are also electrically connected with the source electrode of at least one thin film transistor (TFT) or drain electrode.
Specifically, Fig. 7 is referred to, first electrode 91 and second electrode 92,91 He of first electrode are provided on electrode layer
Second electrode 92 is electrically connected with LED 50 respectively, and first electrode 91 is public electrode, such as can be one end of ground connection；Second electricity
Pole 92 is electrically connected with the drain of driving thin film transistor (TFT) 62, when data-signal makes that thin film transistor (TFT) 62 is driven to be connected, electric current warp
LED 50 is supplied to by the drain of driving thin film transistor (TFT) 62, so that the luminous driving current of driving LED 50 is formed, so that
LED 50 shines.
Optionally, in backlight module 100 provided by the embodiment of the present application, the first electrode 91 that is electrically connected with LED 50 and
Second electrode 92 includes ITO electrode or metal electrode.When using metal electrode, metal electrode can be used Ti, Al, Cu, Mo,
At least one of Ni and Ag are formed.When constituting first electrode 91 and second electrode 92 using ITO or metal material, be conducive to
Realize the solder joint connection of LED 50.
It should be noted that in backlight module 100 provided by the embodiment of the present application, LED 50 be Mini LED 50 or
Micro LED 50.For Mini LED 50 using 50 crystal of LED of micro scale, size is smaller, and yield is high, cuts with abnormal shape
Characteristic is cut, collocation flexible base plate can also achieve the form of high curved surface backlight, be designed using local dimming, possesses and preferably drill color
Property, the energy band HDR subregion more fine to liquid crystal display panel.LED Unit 50 in Micro LED 50 has less than 100 microns
The features such as high brightness, fast high-reliability and reflecting time, and it is small in size, frivolous, energy-efficient effect can be realized easily.
Based on the same inventive concept, the application also provides a kind of display device 300, refers to Fig. 8 and Fig. 9, and Fig. 8 is this Shen
Please display device 300 provided by embodiment a kind of structure chart, Fig. 9 show display device provided by the embodiment of the present application
A kind of 300 sectional view, refers to Fig. 8 and Fig. 9, which includes backlight module 100, which is this
Apply for backlight module 100 provided by any of the above-described embodiment, which further includes display panel 200, display panel
200 and backlight module 100 bonded by shading rubber belt 400.It should be noted that display device provided by the embodiment of the present application
300 embodiment can be found in the embodiment of above-mentioned backlight module 100, and overlaps will not be repeated.Display provided herein
Device 300 can be with are as follows: any tool such as mobile phone, tablet computer, television set, display, laptop, Digital Frame, navigator
There are the products or components of display function.
Through the foregoing embodiment it is found that backlight module provided by the invention and display device, at least realizing following has
Beneficial effect:
In backlight module and display device provided herein, electromagnetic screen is introduced between substrate and driving function layer
Layer is covered, is equivalent to and driving function layer is isolated with the environment of one side of substrate by the electro-magnetic screen layer, the electromagnetic shielding
Layer can effectively stop the electromagnetic signal of one side of substrate to enter in driving function layer, to be conducive to reduce electromagnetic signal to driving
It influences caused by functional layer, so that LED drive current stablizes output, thus is conducive to be promoted the display brightness homogeneity of LED, has
There is the undesirable possibility such as brightness disproportionation or flashing conducive to LED is reduced, and then be conducive to be promoted the display homogeneity of display device,
Promote the display effect of display device.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, 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 embodiments.This hair
Bright range is defined by the following claims.
Claims (13)
1. a kind of backlight module characterized by comprising
Backboard, including substrate and the extension being connected with substrate, plane phase where plane where the substrate and the extension
It hands over, the substrate and the extension form an accommodating space；
Substrate is located in the accommodating space, the substrate is arranged in close to the side of the light-emitting surface of the backlight module；
Side of the substrate far from the substrate is arranged in electro-magnetic screen layer；
Driving function layer, the side positioned at the electro-magnetic screen layer far from the substrate；
Multiple LED are electrically connected with the driving function layer, and are set to the side of the driving function layer far from the substrate.
2. backlight module according to claim 1, which is characterized in that the electro-magnetic screen layer is conductive layer, the conduction
The resistance value of layer is R, wherein the Ω of R≤1000.
3. backlight module according to claim 1, which is characterized in that the electro-magnetic screen layer with a thickness of D1, wherein
50nm≤D1≤100nm。
4. backlight module according to claim 3, which is characterized in that the electro-magnetic screen layer with a thickness of D1, wherein
50nm≤D1≤60nm。
5. backlight module according to claim 1, which is characterized in that further include reflecting layer, the reflecting layer is located at described
Between substrate and the substrate.
6. backlight module according to claim 1, which is characterized in that the electro-magnetic screen layer is transparency conducting layer.
7. backlight module according to claim 1, which is characterized in that the electro-magnetic screen layer is metal layer, the metal
Layer is multiplexed with reflecting layer.
8. backlight module according to claim 1, which is characterized in that the driving function layer includes multiple driving circuits,
The driving circuit is electrically connected with the LED, and the driving circuit includes at least one thin film transistor (TFT) and at least one storage
Capacitor.
9. backlight module according to claim 8, which is characterized in that the driving function layer further includes by insulator separation
Active layer, the first metal layer, second metal layer and electrode layer, the active layer, the first metal layer, second metal
Layer and the electrode layer direction of plane where perpendicular to the substrate are arranged in the electro-magnetic screen layer far from the substrate
Side；
The storage capacitance is formed between the first metal layer and the active layer；The thin film transistor (TFT) includes positioned at described
The grid of the first metal layer and source electrode and drain electrode positioned at the second metal layer.
10. backlight module according to claim 9, which is characterized in that it is remote that the first metal layer is located at the active layer
Side from the substrate, alternatively, the first metal layer is located at the active layer close to the side of the substrate.
11. backlight module according to claim 9, which is characterized in that the driving function layer further includes being located at the electricity
Pole layer and with LED first electrode be electrically connected and second electrode, the first electrode be public electrode, the second electrode
Also it is electrically connected with the source electrode of thin film transistor (TFT) described at least one or drain electrode.
12. backlight module according to claim 11, which is characterized in that the first electrode and the second electrode include
ITO electrode or metal electrode.
13. a kind of display device, which is characterized in that any backlight module including claim 1 to 12.
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| CN201811582053.3A CN109375422B (en) | 2018-12-24 | 2018-12-24 | Backlight module and display device |
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