Display device and its earthing or grounding meansTechnical field
The present embodiments relate to display technology field, in particular to display device and its earthing or grounding means.
Background technology
Liquid crystal display device is that current city accounts for rate highest Display Types, its light, thin, power saving and be easy to miniaturization it is excellentPoint, make to be seen everywhere its trace in daily life, such as mobile phone, notebook computer, numeric type Video Camera, tablet PCIt is to use liquid crystal display device mostly Deng product.Now, utilization rate highest liquid crystal display device is to belong to film transistor typeDisplay device (TFT-LCD).
The technologies such as liquid crystal display device and plasma display panel (PDP), organic light emitting diode display (OLED) are different, areBelong to the display of non-spontaneous light type, it is necessary to additionally set backlight.Meanwhile by the drive circuit in display device, by spyFixed signal is changed and exports and switch voltage, the Liquid Crystal Molecules Alignment direction of display panel is produced change.Above-mentioned backlightCaused light forms picture element by above-mentioned panel, and forms the picture shown by the light transmittance height of every pixel.
According to the displaying principle of above-mentioned display device, extraneous noise, electric charge or electric field change are very easily to liquid crystal pointThe arrangement of son produces interference, the image of display exception is occurred.Therefore, to prevent above-mentioned interference, it is necessary to set drive circuitPrinted circuit board (PCB) must completely cut off ectocine, and try during isolation the electricity do not accumulated in itself because that can not exclude printed circuit board (PCB)Lotus and then interference is produced to the signal of self transmission.
In the prior art, the partial solution tackled above mentioned problem and proposed.Prior art as shown in Figure 1In, typical display device 10 includes metal outer frame 100, framework 200, display panel 300 and printed circuit board (PCB) 400.Display surfacePlate 300 is arranged on the upper surface of framework 200, and printed circuit board (PCB) 400 is arranged on the lower surface of framework 200.Display panel 300 andFramework 200 is electrically connected with by pliability flat cable 510.Metal outer frame 100 is from top to bottom linked in the outside of glue frame 200,And with the hollow region of exposure display panel 300.
For prevent the above-mentioned stored charge of printed circuit board (PCB) 400 institute there may be the problem of, as shown in Fig. 2 in printed circuitThe side of the contiguous metal housing 100 of plate 400 sets ground terminal 430, and ground terminal 430 is to be fixed on frame by screw 435On frame 200.Meanwhile grounding elastic part 440 is set ground terminal 430 is electrically connected to metal outer frame 100.Wherein grounding elastic part440 be to be fixed on by another screw (being not presented in accompanying drawing) in metal outer frame 100.Pass through above-mentioned setting, printed circuit board (PCB)The electric charge accumulated on 400 can be transferred to metal outer frame 100 by grounding elastic part and is discharged into external environment.
However, metal outer frame is to be connected on display panel in such scheme simultaneously, the electric charge of accumulation still has very big chanceInterference is produced and then the arrangement to liquid crystal molecule by the contact with display panel, therefore, still has and waits improved space.
The content of the invention
Technical problems to be solved of the embodiment of the present invention are to provide a kind of display device, aobvious to avoid stored charge from influenceingShow quality.
The further technical problems to be solved of the embodiment of the present invention are to provide a kind of earthing or grounding means of display device, to keep awayExempting from stored charge influences display quality.
To solve the above problems, the embodiment of the present invention provides a kind of display device first, including：
Display panel；
Framework, it is made up of non-conducting material, and the display panel is arranged on the framework；
Metal side frame, it is arranged in four side walls of the framework；
Top side protecting frame, be arranged on the framework and the display panel, it be made up of non-conducting material, wherein the top sideProtecting frame has the hollow region of the exposure display panel, and the hollow region is less than the display panel；
Printed circuit board (PCB), it is arranged on below the framework and does not contact the metal side frame, and passes through pliability flat cableIt is electrically connected to the display panel；
Conducting film, attach and be electrically connected with the earth terminal of the printed circuit board (PCB) and the metal side frame；And
Protective layer, it is made up of Ins. ulative material, covers on the printed circuit board and the print is attached to by adhesion materialThe periphery of printed circuit board, with the fixation printed circuit board (PCB), and extend to cover and fix the pliability flat cable, asElectrical barrier.
Alternatively, the earth terminal is provided in the lower surface of the printed circuit board (PCB) or from the side of the printed circuit board (PCB)Edge extends to side.
Alternatively, when there is the conducting film one side to paste property, the protective layer is attached and covered by adhesion materialThe conducting film.
Alternatively, when the conducting film have it is two-sided paste property, the protective layer is sticked directly on the conducting filmTo cover the conducting film.
Alternatively, attaching has the two-sided conducting film for pasting property on the periphery of the printed circuit board (PCB) to be used as instituteAdhesion material is stated, by the protective layer by being covered with the two-sided conducting film for pasting property and attaching the printed circuitPlate.
On the other hand, the embodiment of the present invention also provides a kind of earthing or grounding means of display device, including：
Metal side frame, it is arranged in four side walls of the display device inner frame；
Earth terminal, it is arranged at the lower surface of the printed circuit board (PCB) or extends from the edge of the printed circuit board (PCB) to side；
Conducting film, attach and be electrically connected with the earth terminal of the printed circuit board (PCB) and the metal side frame；And
Protective layer, it is made up of Ins. ulative material, covers on the printed circuit board and the print is attached to by adhesion materialThe periphery of printed circuit board, with the fixation printed circuit board (PCB), and extend to cover and fix the pliability flat cable, asElectrical barrier.
Alternatively, when there is the conducting film one side to paste property, the protective layer is attached and covered by adhesion materialThe conducting film.
Alternatively, when the conducting film have it is two-sided paste property, the protective layer is sticked directly on the conducting filmTo cover the conducting film.
Alternatively, attaching has the two-sided conducting film for pasting property on the periphery of the printed circuit board (PCB) to be used as instituteAdhesion material is stated, by the protective layer by being covered with the two-sided conducting film for pasting property and attaching the printed circuitPlate.
Another aspect, the embodiment of the present invention also provide a kind of display device, including：
Display panel；
Framework, it is made up of non-conducting material, and the display panel is arranged on the framework；
Metal side frame, it is arranged in four side walls of the framework；
Top side protecting frame, be arranged on the framework and the display panel, it be made up of non-conducting material, wherein the top sideProtecting frame has the hollow region of the exposure display panel, and the hollow region is less than the display panel；
Printed circuit board (PCB), it is arranged on below the framework and does not contact the metal side frame, and passes through pliability flat cableIt is electrically connected to the display panel；
Conducting film, attach and be electrically connected with the earth terminal of the printed circuit board (PCB) and the metal side frame；And
Protective layer, it is made up of Ins. ulative material, covers on the printed circuit board and the print is attached to by adhesion materialThe periphery of printed circuit board, with the fixation printed circuit board (PCB), and extend to cover and fix the pliability flat cable, asElectrical barrier；
Wherein, the earth terminal is provided in the lower surface of the printed circuit board (PCB) or from the edge of the printed circuit board (PCB) to sideSide extends；
Wherein, when there is the conducting film one side to paste property, the protective layer is attached by adhesion material and covers described leadElectrolemma；
Wherein, when the conducting film have it is two-sided paste property, the conducting film be attached to the periphery of the printed circuit board (PCB) withAs the adhesion material, and by the protective layer by covering with the two-sided conducting film for pasting property and directly attachingThe printed circuit board (PCB).
By using above-mentioned technical proposal, the embodiment of the present invention at least has the advantages that：The embodiment of the present invention carriesThe liquid crystal display and its earthing or grounding means of confession, improve what is formed in the prior art using components such as screw, grounding elastic partsStructure, the space that those components occupy is saved, liquid crystal display is more attained lightly.In addition, do not influenceing printed circuit board (PCB)Earthing effect while, conventional metals cover is substituted with the combination of the top side protecting frame with insulating properties and metal side frame, avoidedThe electric charge for being transferred to metal cap has influence on display quality.
Brief description of the drawings
By referring to accompanying drawing detailed description exemplary embodiment, above and other feature and advantage are to people in the artMember will become apparent.In addition, the size of depicted each inter-module and set location are all with order to detailed in accompanying drawingRelation therebetween is explained, and is not intended to limit the size and location relation of such component.
Fig. 1 is the schematic diagram that the circuit board of display device of the prior art is grounded by metal outer frame.
Fig. 2 is the polycrystalline substance schematic diagram of the display device shown in corresponding diagram 1.
Fig. 3 A are the structural representations of the liquid crystal display of one embodiment of the invention, and wherein dashed region is interiorPortion's structural representation.
Fig. 3 B and Fig. 3 C are the partial structural diagrams of the liquid crystal display of one embodiment of the invention.
Fig. 3 D are the bottom partial structural diagrams of the display device of one embodiment of the invention.
Fig. 4 A and Fig. 4 B are the bottom partial structural diagrams of the display device of one embodiment of the invention.
Fig. 4 C are the bottom partial structurtes side views of the display device of one embodiment of the invention.
Fig. 4 D are the bottom partial structural diagrams of the display device of one embodiment of the invention.
Fig. 4 E are the bottom partial structurtes side views of the display device of one embodiment of the invention.
Fig. 5 is the bottom partial structurtes side view of the display device of one embodiment of the invention.
Fig. 6 is the partial structural diagram of the liquid crystal display of one embodiment of the invention.
Fig. 7 is the bottom partial structurtes side view of the liquid crystal display of one embodiment of the invention.
Fig. 8 A and Fig. 8 B are the partial structural diagrams of the liquid crystal display of another embodiment of the present invention.
Embodiment
Illustrative embodiments are more fully described hereinafter with reference to accompanying drawing；However, they can embody simultaneously in different formsIt is not construed as being limited to embodiment described in text.On the contrary, these embodiments are provided so that the disclosure is thorough and complete,And it will intactly convey the scope of the invention to those skilled in the art.
In the description of the present application, it is to be understood that the instruction such as term " on ", " under ", "left", "right", " interior ", " outer "Orientation or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of description the application and simplification retouchedState, rather than imply signified device or component there must be a specific orientation, therefore it is not intended that limitation to the application.
, it is necessary to illustrate in the description of the present application, unless otherwise clearly defined and limited, term " installation ", " phaseEven ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；CanTo be mechanical connection or electric connection；Can be joined directly together, can also be indirectly connected by intermediary.Term" attaching ", " pasting " should be interpreted broadly, for example, it may be part attach, can be completely it is closely sealed attaching or it is removableAttaching unloaded etc..For the ordinary skill in the art, it can understand above-mentioned term in this application with concrete conditionConcrete meaning.
As shown in Figure 3A, the embodiment of the present invention provides a kind of display device 900, has display panel 130.Display panel130 are arranged on framework 110, and alternatively, framework 110 can be any non-conducting material institute structure that can be supported without producing deformationInto, but not limited to this.Metal side frame 101 is arranged in four side walls of framework 110, and metal side frame 101 can be directly anchored to frameIn four side walls of frame 110, or can between framework 110 indwelling space for setting All other routes or component.Stayed above-mentionedUnder situation between being empty, relative position that metal side frame 101 can be fixed between framework 110 by other means.Protect top sideFrame 102 is arranged on the top of framework 110 and display panel 130, alternatively, top side protecting frame 102 can be any can support andThe non-conducting material for not producing deformation is formed, but not limited to this.Top side protecting frame 102 has hollow region, aobvious to exposureShow panel 130.The area of above-mentioned hollow region is less than display panel 130, therefore, when top side protecting frame 102 is arranged on framework 110And display panel 130 top when, can more lift the steadiness that display panel is fixed on framework 110.Top side protecting frame 102It can be fixed in any suitable manner on framework 110, such as：Top side protecting frame 102 directly can stick together frame using adhesion materialFrame 110, or top side protecting frame 102 and metal side frame 101 can have corresponding connection component, make setting top side protecting frameThe relative position of top side protecting frame 102 and metal side frame 101 can be fixed when 102 by above-mentioned connection component, is further fixedTo framework 110, but method is not limited to above-mentioned carried.
Printed circuit board (PCB) 150 is arranged on the lower section of framework 110, such as：The lower section of framework 110 or excision frame can be set directly atThe section bottom of frame 110, printed circuit board (PCB) 150 is set partly to be embedded in framework 110.Printed circuit board (PCB) 150 can not connect when settingTouch metal side frame 101.Printed circuit board (PCB) 150 can be transmitted the signal required for showing image by pliability flat cable 151To display panel 130.As shown in Figure 3A, pliability flat cable 151 can pass through metal side frame 101 along the surface of framework 110And the indwelling space between framework 110 is electrically connected to display panel 130.Or also can as shown in Fig. 3 B and Fig. 3 C, byVertically oriented aperture there-through 120 is set in framework 110, pliability flat cable 151 is electrically connected to by above-mentioned through hole 120Display panel 130.
As shown in Figure 3 D, printed circuit board (PCB) 150 can have earth terminal 153, and alternatively, earth terminal 153 is settable from printingThe edge of circuit board 150 stretches out, but pliability flat cable 151 of getting along well is arranged on same edge in order to avoid contacting accidentally.It is aobviousShowing device 900 further includes conducting film 160.Conducting film 160 can be electrically connected with the earth terminal 153 and metal side of printed circuit board (PCB) 150Frame 101, the electric charge for making to accumulate on printed circuit board (PCB) 150 can be moved to metal side frame 101 by conducting film 160, then discharge to outerPortion's environment.Conducting film 160 can be by tackness material attachment in printed circuit board (PCB) 150 and metal side frame 101.Alternatively, it is conductiveFilm 160 is that there is one side to paste property or the two-sided conductive tape for pasting property.The material of conducting film 160 can be such as aluminium foil,Copper foil, electroconductive polymer etc., but not limited to this.
Except above-mentioned setting, as shown in Figure 4 A, several earth terminals 153 can be set, to improve earthing effect.The present invention'sIn another embodiment, several earth terminals 153 can be separately positioned on the same edge of printed circuit board (PCB) 150, or be separately positioned onDifferent edges, but pliability flat cable 151 of getting along well is arranged on same edge in order to avoid contacting accidentally.Several earth terminals are being setIn the case of 153, conducting film 160 can be divided into some fragments, and several earth terminals 153 are electrically connected into metal side frame respectively100。
Display device 900 also includes protective layer 170, and protective layer 170 can be made up of Ins. ulative material.As shown in Figure 4 B, whenWhen conducting film 160 is the conductive tape that there is one side to paste property, protective layer 170 can be covered on printed circuit board (PCB) 150, andThe periphery of printed circuit board (PCB) 150 and the periphery of conducting film 160 are attached to by adhesion layer 180, with fixing printed circuit plate 150 andConducting film 160.Meanwhile protective layer 170 can as electrical barrier by the circuit on printed circuit board (PCB) 150 and component with it is extraneous everyAbsolutely, avoid the factor interference signal of external environment condition and cause to show results abnormity.The side schematic view of said structure such as Fig. 4 C institutesShow.Protective layer 170 may be further extended and cover pliability flat cable 151, using as electrical barrier avoid external environment condition becauseElement interference.Further, while protective layer 170 covers possibility flat cable 151, can be fixed by tackness material canFlexible flat cable 151.
By printed circuit in the liquid crystal display provided by above embodiments of the invention, and those embodimentsThe earthing or grounding means that combination between plate, metal side frame, conducting film and protective layer is formed can be effectively improved ground connection of the prior artThe problem of device.In the prior art, top side protecting frame 102 and metal side frame 101 are fabricated to the metal cap being one of the forming more,It is overall all conductive, therefore, when excess charge is transmitted to metal cap, it may not discharge to external environment condition, orPart is first transferred to the part nearer apart from display panel 130 and just discharged, and interferes the letter for being transferred to display panel 130Number, or because those electric charges influence the arrangement of liquid crystal molecule in display panel 130, cause the image that display device 900 is shown to produceIt is raw abnormal.Under comparing, the part of present invention contact display panel 130 only has the framework 110 of non-conducting material and top side is protectedFrame 102 is protected, therefore the electric charge for being transferred to by conducting film 160 metal side frame 101 does not interfere with display panel 130, and also notThe effect that electric charge is discharged into external environment condition by metal side frame 101 can be influenceed.In addition, using with the conducting film for pasting propertyThe structure of 160 substitution screws and grounding elastic part, can reduce several steps in manufacturing process, can more save screw and grounding elastic partThe space accounted for, and then produce more frivolous liquid crystal display.Wherein, display panel may be, for example, LCD display panel,OLED display panel, QLED display panels, curved face display panel or other display panels.
Than the above described, can also be optimized according to actual state and demand for wherein several components, moreAdd enhancing advantages of the present invention, will hereafter be illustrated with different embodiments.
In one embodiment, optimize for conducting film 160, taken using with the two-sided conducting film 160 for pasting propertyIn generation, pastes the conducting film 160 of property with one side, and remaining setting is identical with previous embodiment.As shown in Figure 4 D, when conducting film 160Be have it is two-sided paste property conductive tape when, except conducting film 160 is electrically connected with into earth terminal 153 and metal side frame 101Outside, conducting film 160 can be also pasted around printed circuit board (PCB) 150.Then, the viscosity of the exposed surface of conducting film 160 is passed throughMatter, protective layer 170 is pasted on printed circuit board (PCB) 150, earth terminal 153 and metal side frame 101.Pasted compared to one sideThe conducting film 160 of property, using the function of substituting adhesion layer 180 with the two-sided conducting film 160 for pasting property, it can save and stick togetherThe thickness of layer 180, the step of adhesion layer 180 are set can be more saved in the manufacture for manufacturing liquid crystal display.Said structureSide schematic view is as shown in Figure 4 E.
In another embodiment, optimized for earth terminal 153, earth terminal 153 is arranged on printed circuit board (PCB) 150Lower surface, rather than by extending on the outside of the edge item of printed circuit board (PCB), remaining setting is identical with previous embodiment.As shown in figure 5, byIt is conductive tape in conducting film 160, there is a certain degree of pliability, therefore earth terminal is arranged on printed circuit board (PCB) 150Lower surface, the setting of conducting film 160 and protective layer 170 is not influenceed.This method to set up can reduce the difficulty in the manufacture of earth terminal 153Degree.
In another embodiment, carried out for printed circuit board (PCB) 150, pliability flat cable 151 and protective layer 170 excellentChange, and set up insulating properties connecting portion 155, remaining setting is identical with previous embodiment.As shown in fig. 6, using surface to cover in advanceThe pliability flat cable substitution pliability flat cable 151 of lid insulating properties protection materials, and it is defined as surface insulation electricityCable 1511.Insulating properties connecting portion is set up in the tail end of surface insulation cable 1511, that is, with the junction of printed circuit board (PCB) 150155.Insulating properties connecting portion 155 has insulating properties shell and hollow region, and hollow region has fixable port organization,So that other assemblies are electrically connected with surface insulation cable 1511.In addition, use the printing electricity with corresponding above-mentioned port organizationRoad plate 1501 substitutes printed circuit board (PCB) 150, and printed circuit board (PCB) 1501 and surface insulation cable 1511 are connected by port organization.ItsAfterwards, when setting protective layer 170, protective layer 170 only needs to be arranged on printed circuit board (PCB) 1501 and conducting film 160, without prolongingStretch to cover surface insulation cable 1511.Because the surface of surface insulation cable 1511 is insulating properties protection materials, therefore notIt is vulnerable to other interference.The insulating properties connecting portion 155 set up, the soundness between cable and printed circuit board (PCB) can be strengthened, be liftedThe service life of liquid crystal display.Wherein, the rigidity Ins. ulative material higher compared with protective layer 170 can be used in insulating properties shell,And then relatively fragile junction is protected, come off or damage caused by avoid in manufacture collision or other factors.In addition, byIt is not required to extend over surface insulation cable in protective layer 170, it is more simple in manufacture.
In another embodiment, the earth terminal 153 that can be directed to printed circuit board (PCB) 150 is optimized, and earth terminal 153 is setThe border of prominent framework 110 is extended at the edge of printed circuit board (PCB) 150 and laterally, remaining is set and previous embodiment phaseTogether.As shown in fig. 7, earth terminal 153 extends on the outside of the edge picture of printed circuit board (PCB) 150 and direct contacting metal side frame 101.Under this situation, the electric charge that printed circuit board (PCB) 150 is accumulated directly can be moved to metal side frame 101 via earth terminal 153, without volumeOuter setting conducting film 160.Alternatively, metal side frame 101 can have the slot of adaptation earth terminal 153, so that earth terminal 153 is directInsert in slot and fix, and then directly contacted with metal side frame 101 to be electrically connected with.Alternatively, printed circuit board (PCB) 150 protrudesThe part of framework 110 is only free of other circuits comprising earth terminal 153.Really make earth terminal 153 and metal side frame 101 electricalAfter connection, protective layer 170 is set to be used as electrical barrier.
In another embodiment, the knot of printed circuit board (PCB) 150, pliability flat cable 151 and above-mentioned through hole 120 can be directed toStructure optimizes.As shown in Fig. 8 A and Fig. 8 B, conductive part 900 is set in the rear side of printed circuit board (PCB) 150, i.e. frame oriented110 side.In addition, the opening of through hole 120 towards printed circuit board (PCB) 150 is arranged to given shape, and alternatively, the specific shapeShape agrees with conductive part 900.When setting printed circuit board (PCB) 150 in the lower surface of framework 110, it is fixed on conductive part 900 logicalIn hole, and pliability flat cable 151 is directly by conductive part 900 and through through hole 120 so that printed circuit board (PCB) 150 and displayPanel 130 is electrically connected with.In the case, the junction of printed circuit board (PCB) 150 and pliability flat cable 151 is completely disposed in logicalIn hole 120, it is not required to additionally rely on protective layer 170 and external insulation.
What said above is only that alternatively embodiment describes in detail according to the present invention, the right being not intended to limit the present inventionScope.Relevant art has usually intellectual and all should be understood that under the technical principle and spirit without prejudice to the present invention, canAbove-described embodiment is modified and changed.Therefore the interest field of the present invention should be as described in appended claims.