CN202535669U - Electronic device with display screen surface and power-driven fluid driving device - Google Patents

Abstract

The utility model provides an electronic device with a display screen surface and a power-driven fluid driving device. An electronic display device comprises a display screen, an outer shell, and an EHD fluid driving device that is used to cool the electronic display device.

Description

Electronic installation with display screen surface and electrical fluid fluid pusher

The cross reference of related application

The application relates to: the United States Patent (USP) provisional application No.61/478 that (i) submitted on April 22nd, 2011; 312; The PCT international application No.PCT/US11/48525 of the appointment U.S. of (ii) submitting on August 20th, 2011 and the U.S. Patent application No.13/310 that (iii) submitted on December 2nd, 2011,676.

Technical field

The application relates to thermal management, relates more specifically to the cooling device as the part of the thermal management scheme that is used to dispel the heat, and it produces ion and electric field flows (like air stream) with propelling fluid.

Background technology

The device of the principles of construction of the ion motion of use fluid has different appellations in document: ion blower, electric fan, corona air pump, electricity-flow-mechanics (EFD) device, electrical fluid (EHD) propeller and EHD air pump.Some aspect of this technology also has been used for being called the device of electric air cleaner or electrostatic precipitator by exploitation.

When using as the part of thermal management scheme, the ion fluid propeller can improve cooling effectiveness, the generation that reduce vibration, reduces energy consumption, lowers electronic equipment temperature and/or noise.These characteristics can reduce whole cost in use, equipment size or volume, and in some cases, can improve systematic function or user's use experience.

Because design of electronic devices person trends towards more and more littler form factor, for example in ultra-thin formula handheld apparatus (like smart phone and panel computer), the packaging density of parts and subsystem causes the very big challenge aspect thermal management.In some cases, possibly need the active heat removal strategy so that surrounding environment is arrived in waste heat discharge.In some cases, can need not to cross the material Transfer on ventilation border, still, possibly need or require in equipment, to conduct heat to reduce focus.

The ion flow liquid propeller has provided the technical parts of attractive thermal management scheme.Desirable scheme is to allow the ion fluid propeller to be incorporated in the electronic equipment thin and/or the concentrated type encapsulation, and will be incorporated into usually provides little to the volume that is in critical dimension in 2-3mm gap.Specifically, desirable scheme is to allow EHD parts and the electronic building brick that intensive encapsulation is high-tension, produce ion flow, otherwise they can be responsive to static discharge and/or electromagnetic interference.In some cases, desirable scheme is to control or to alleviate the ozone byproduct of some high electric field area and/or discharge.

The utility model content

Have been found that through in electronic installation element storehouse (device stack), using EHD fluid pusher, can reduce the size and increase packaging density of electronic display unit.In some embodiments according to the utility model; Electronic installation comprises surface behind display screen front surface and the relative shell; Define device thickness between them, wherein pass the first cross section part of said device thickness and mainly form by the said display screen that roughly is layered arrangement, electrical fluid (EHD) fluid pusher and said shell.Said EHD fluid pusher is constructed to the part of the thermal management of said electronic installation; Comprise at least one emitter electrode and one or more collector electrode; Said emitter electrode is positioned near said one or more collector electrode; Ion is quickened towards said one or more collector electrodes, thereby in electronic installation, promote to produce fluid stream.

In certain embodiments, said electronic installation is constructed to one of lower device or multiple: panel display apparatus, television set and one-piece type computer, panel computer or palmtop computer (tablet or pad).In some cases, said device thickness is less than about 10 millimeters.In some cases, the thickness of EHD fluid pusher is less than about 4 millimeters.In certain embodiments, the quantity of said collector electrode is at least two, and wherein first collector electrode forms the exposed interior surface of said shell or on the exposed interior surface of said shell, forms.

In certain embodiments; The thickness of getting rid of the material on surface behind glass and the said relative shell of said display screen front surface; The whole said device thickness of passing said first cross section is limited said EHD fluid pusher basically, and the thickness of said EHD fluid pusher is less than about 4 millimeters.In some cases, said first cross section comprises the edge glass part of said display screen, does not have dorsal part display or illumination component basically.

In certain embodiments; Said electronic installation also is included in the heat transfer path that is provided with in the flow path; Said heat transfer path is made up of one or more thermals source to the heat transfer surface that is positioned at said shell, and said EHD fluid pusher promotes to produce fluid stream along said flow path when obtaining energy.

In certain embodiments, said shell seals said electronic display unit basically, so that the fluid stream that is produced by said EHD fluid pushers is included within the said shell and recirculation therein basically.In certain embodiments, said shell allows at least some fluid flows to cross internal volume and the border between the outside in said shell.In certain embodiments, said shell comprises one or more aeration portions on said border, and whole basically fluid fluxs by said EHD fluid pushers assign to get into and discharge through said ventilation unit.

In certain embodiments, one of in the enclosure the inner surface of circuit board and said shell or both at least a portion apply the material that ozone is had catalytic action or reactivity.In certain embodiments; Said electronic installation also is included in the heat transfer path that is provided with in the flow path; Said heat transfer path is made up of the thermal source in the said shell to heat transfer surface, promotes to produce fluid stream along said flow path during said EHD fluid impeller operated.In some cases, said heat transfer path one of comprises in heat pipe and the radiator or both.In some cases, at least a portion of said heat transfer path applies the material that ozone is had catalytic action or reactivity.

In some embodiments according to the utility model; Said electronic installation comprises relative shell front surface portion and back surface portion; Define device thickness between them, second cross section of wherein passing said device thickness mainly is made up of the back surface portion of front surface portion, electrical fluid (EHD) fluid pusher and the said shell of the said shell that roughly is layered arrangement.Said electronic installation also comprises the display screen surface in the front surface that is embedded in said shell.Said EHD fluid pusher is constructed to the part of the thermal management of said electronic installation; Comprise at least one emitter electrode and one or more collector electrode; Said emitter electrode is positioned near said one or more collector electrode; Ion is quickened towards said one or more collector electrodes, thereby in electronic installation, promote to produce fluid stream.

In certain embodiments, said electronic installation is constructed to one of lower device or multiple: panel display apparatus, television set and one-piece type computer, panel computer or palmtop computer.In some cases, device thickness is less than about 10 millimeters.In some cases, the thickness of EHD fluid pusher is less than about 4 millimeters.

In certain embodiments, the quantity of said collector electrode is at least two, and wherein first collector electrode forms the exposed interior surface of said shell or on the exposed interior surface of said shell, forms.

In certain embodiments, said shell seals said electronic display unit basically, so that the fluid stream that is produced by said EHD fluid pushers is included within the said shell basically.In certain embodiments, said shell allows at least some fluid flows to cross internal volume and the border between the outside in said shell.In certain embodiments, said EHD fluid pusher has occupied the major part of overall apparatus thickness.In some cases, the front surface portion of getting rid of said shell and back surface portion and the thickness that is embedded in any insertion portion of the said display screen surface in said second cross section, said device thickness is made up of said EHD fluid pusher basically.

With reference to description, accompanying drawing here and the claim of enclosing, can understand these and other embodiment better.

Description of drawings

Through with reference to accompanying drawing, those skilled in the art can understand the utility model and numerous purpose, feature and advantage thereof better.Accompanying drawing is not to draw in proportion, and its emphasis point is the structure and manufacturing principle that said embodiment will be shown on the contrary.

Fig. 1 is the sketch map of some basic principle of electrical fluid in the corona discharge type device (EHD) fluid stream.

Fig. 2 is an exemplary high voltage source configuration, thereby wherein emitter electrode and collector electrode obtain energy and promote to produce fluid and flow.

Fig. 3 A and 3B are respectively the edge side view and the perspective views of exemplary flat panel display type consumer electronics device, are contained in the low profile thickness according to the EHD fluid pusher of some embodiments of the utility model.

Fig. 4 A is an interior views (haply corresponding to Fig. 3 A and 3B panel display apparatus), and position relation and draft between each assembly are shown.Fig. 4 B and 4C are the exemplary sectional views of panel display apparatus, and each EHD air mover that illustrates respectively is incorporated in the flat panel display type consumer electronics device.

Fig. 5 A and 5B represent exemplary panel computer or palmtop computer, and wherein the configuration of EHD air mover is deployed in the inner space of shell.Fig. 5 B illustrates the sectional view that passes said panel computer or palmtop computer especially, and wherein EHD air mover and display screen define a big chunk of said device storehouse.

Fig. 6 representes another exemplary electrical fluid (EHD) fluid pusher configuration, and wherein the emitter and collector electrode obtains energy pusher movable property and gives birth to fluid stream.Be equipped with the line style collector electrode, as before, in the conduit wall dielectric substance, formed shallow trench, be used to reduce static discharge electric arc.

Fig. 7 representes a modification of EHD fluid pusher configuration shown in Figure 6, wherein in the conduit wall dielectric substance, not only forms shallow trench but also form narrow ramp.Electric charge accumulation along narrow ramp provides the electric field adjustment, helps to reduce static discharge electric arc.

Used same reference numeral is represented similar or identical parts in different accompanying drawings.

Embodiment

As will be understood that, many designs as herein described and the technological thermal management challenge that is specially adapted to intensive packaged device and the typical little form factor of modern consumption property electronic product.In fact; The angle of rake design of some EHD fluid/air as herein described helps the active thermal management in the electronic installation with technology, and the thinness of wherein said electronic installation or industrial design are got rid of or limited such as the angle of rake feasibility of the mechanical air of fan, air blast or the like.In certain embodiments, said EHD fluid/air propeller can be fully integrated in operating system, such as video display devices, STB, projector or the like.In other embodiment, said EHD fluid/air propeller can adopt the form of sub-component or shell, and it is suitable for said system EHD propelling fluid stream is provided.

In the ordinary course of things; Can be modification (the said electrostatic operation surface qualification electric field adjustment member of electrostatic operation surface imagination various size, geometry and other design; Perhaps on function, constitute collector electrode), and be limited to said electrostatic operation surface and the emitter of given EHD device and/or all places correlation between the collector electrode.For the purpose of explaining, this paper be absorbed in some example embodiment and some surface profiles and with the position correlation of other assembly.For example; In a large amount of narrations of this paper; Roughly flat collector electrode is formed the inner surface of shell or on the exposed surface of electromagnetic interference (EMI) shielding or printed circuit board (PCB) (PCB), forms; And being arranged to parallel surfaces near corona discharge type emission polar curve, the said line of departure moves apart the leading edge portion of corresponding collector electrode.However, other embodiment can adopt other electrostatic operation geometry, surface configuration or other ion generation technique, in the narration scope that this paper provides, still can be understood.

In this application, the some aspects with described embodiment shown in this paper can be described as electrical fluid fluid accelerator installation, also can be described as " EHD device ", " EHD fluid accelerator ", " EHD fluid pusher " or the like.For illustrative purposes, some embodiment can narrate with respect to specific EHD apparatus structure, wherein produce ion at the emitter place or near the corona discharge of emitter, and said ion is accelerated having under the situation of electric field, thereby propelling fluid flows.Though the corona discharge type device provides the narrating content of usefulness, be appreciated that (based on this specification), can also adopt other ion generation technique.For example, in some embodiments, the technology such as silent discharge, alternating current discharge, dielectric barrier discharge (DBD) or the like can be used for producing ion, and said ion is accelerated under the situation of electric field and propelling fluid stream having successively.

Use heat transfer surface (it adopts the form of fin in certain embodiments), the heat of being distributed by electronic installation (for example microprocessor, graphic element or the like) and/or other element can pass to the fluid stream that EHD promotes, and discharges from shell through the ventilation border.Usually; When thermal management is integrated into operational environment; Thermally conductive pathways (be embodied as heat pipe usually or use other technology) can be set; Heat is transferred to the position (or a plurality of position) in said shell from distributing (or generation) part, and the air-flow that is promoted by an EHD device (or a plurality of EHD device) wherein can flow through heat transfer surface.

In order to explain, can fin be described with respect to different example embodiment.Yet; Be appreciated that according to this specification; In certain embodiments, need not to be provided with traditional radiation fin array, the fluid that EHD promotes can flow on the inner surface that exposes; Though whether near or away from heat generator (such as processor, memory, RF part, photoelectron or light source), enough heat transferred can be provided.In each case, it is desirable surface/material that ozone is had catalytic action or a reactivity being provided on heat transfer surface.Usually, the leading ion of heat transfer surface, electric field adjustment surface and collector electrode is collected face and is revealed different design challenge, and with respect to some embodiment, they can use different structure or provide through different surface treatment method.Yet in certain embodiments, the both available static work of single structure (for example adjusting electric field or collection of ions) can be passed to the fluid stream that EHD promotes with heat again.

It should be noted that in some nonventilated embodiment EHD propelling fluid stream can circulate within shell, by this can be radioactively from the surface of exposing or convection current transfer heat to surrounding environment.Like this, can get rid of or can reduce the focus on the outer surface of shell at least, though do not have mass air flow through the situation on the border that ventilates under also in this way.Certainly, in certain embodiments, use EHD propelling fluid stream both can manage local focus, can heat be discharged to the air-flow that can flow through the ventilation border by forced convection heat transfer again.

General electrical fluid (EHD) fluid quickens

The basic principle of electrical fluid (EHD) fluid stream is familiar with in this area very much; In this respect, people's such as Jewell-Larsen the article that is entitled as " Modeling of corona-induced electrohydrodynamic flow with COMSOLmultiphysics " (in " Proceedings of the ESA Annual Meeting on Electrostatics 2008 ") (hereinafter to be referred as " Jewell-Larsen Modeling article ") provides useful general introduction.Equally, people such as Krichtafovitch have narrated some electrodes and the high voltage source structure that can be used for some EHD devices in the United States Patent (USP) 6,504,308 that is entitled as " Electrostatic Fluid Accelerator " of 14 propositions October in 1999.United States Patent (USP) 6,504,308 is included in as a reference at this together with the chapters and sections " part i (introduction), part ii (background) and III part (numerical modeling) " of " Jewell-Larsen Modeling article ", so that can be with reference to they all enlightenments.

With reference to shown in Figure 1, the EHD principle has been described among the figure briefly, be included between first electrode 10 (often be called as " corona electrode ", " corona discharge electrode ", " emitter electrode " or just " emitter ") and second electrode 12 and apply high field.Near emitter region of discharge 11 fluid molecule, for example the ambient air molecule forms ion 16 streams 14 that quicken to second electrode 12 after ionization, and collides with neutral fluid molecule 17.During colliding, momentum is delivered to neutral fluid molecule 17 from ion 16 streams 14, causes fluid molecule 17 correspondingly to move towards second electrode 12 along the desirable fluid flow direction shown in the arrow 13.Second electrode 12 has various appellation, like " accelerating electrode ", " attraction electrode ", " target electrode " or " collector electrode ".Though ion 16 stream 14 is attracted by second electrode 12,, be delivered to neutral fluid molecule 17 momentum and carry them and still continue with certain speed through second electrode 12 usually by 12 neutralizations of second electrode.The fluid motion that is produced by the EHD principle also has various different appellations, like " ", " corona " or " ion " wind, is defined as by near the gas motion that ion motion caused the high-voltage discharging electrode 10.

EHD fluid pusher design as herein described can comprise one or more corona discharge type emitter electrodes.In the ordinary course of things, said corona discharge electrode comprises a part (or a plurality of part), and it demonstrates little radius curve and the form that can take line, bar, sword or point.Corona discharge electrode also can have other shape; For example; Adoptable serration plate or the non-serration plate that is shaped as barbed wire, wide bonding jumper and has sharp and thin part of corona discharge electrode; When applying high voltage, said sharp and thin part helps ion having generation on the electrode part of small curvature radius.Generally speaking, corona discharge electrode can be used various material.For example; In some embodiments, can use as submit on December 2nd, 2003, be entitled as " corona discharge electrode and method of operation thereof (Corona Discharge Electrode and Method of Operating the Same) " and authorize composition as description in inventor's gram Ritchie Tuo Fuweiqi (Krichtafovitch) people's of etc.ing the U.S. Pat 7157704.Combine United States Patent (USP) 7,157,704 at this, purpose only limits to can be used for as narration the material of some emitter electrodes of some corona discharge type embodiment.In general, high voltage source can produce electric field between the corona discharge utmost point and collector electrode.

EHD liquid propeller design described herein comprises the ion collection surface that is positioned at one or more corona discharge electrodes downstream.Usually, the ion collection surface of EHD liquid propeller part is included in the surface of flat collector electrode basically of said corona discharge electrode downstream extension.In some cases, collector electrode can be used as heat transfer surface and has difunctional.The ion collection surface of fluid permeable can be provided in some cases.

EHD liquid propeller design as herein described generally comprises single elongated line style, corona discharge type emitter electrode, though (perhaps more at large) also can be adopted the geometry of a plurality of emitter electrodes and other emitter.In the ordinary course of things, the corona discharge type emission electrode comprises a part (or a plurality of part), and it demonstrates little radius curve and the form that can take line, bar, sword or point.Corona discharge electrode also can have other shape; For example; Adoptable serration plate or the non-serration plate that is shaped as barbed wire, wide bonding jumper and has sharp and thin part of corona discharge electrode; When applying high voltage, said sharp and thin part helps ion having generation on the electrode part of small curvature radius.

Generally speaking, corona discharge electrode can be used various material.For example, in some embodiments, the corona discharge type emitter electrode is formed by tungsten (W) line of the plating palladium nickel (PdNi) with rhodium (Rh) coating.Referring to that for example own together, to be examined U.S. Patent application No.13/302; No. 811; On November 22nd, 2011 submitted to; Name is called " the emission polar curve (EMITTER WIRE WITH LAYERED CROSS-SECTION) that has the branch layer cross section ", artificial high, ell-Larsen of invention and Han Consulting this (Humpston), and this patent application is here introduced as to suitable and explanation exemplary emission polar curve metallurgical technology.In some embodiments, can use as submit on December 2nd, 2003, be entitled as " corona discharge electrode and method of operation thereof (CoronaDischarge Electrode and Method of Operating the Same) " and authorize composition as description in inventor's gram Ritchie Tuo Fuweiqi (Krichtafovitch) people's of etc.ing the U.S. Pat 7157704.Combine United States Patent (USP) 7,157,704 at this, purpose only limits to can be used for as narration the material of some emitter electrodes of some corona discharge type embodiment.In general, high voltage source can produce electric field between the corona discharge utmost point and collector electrode.

EHD liquid propeller design described herein comprises the ion collection surface that is positioned at one or more corona discharge electrodes downstream.Usually, the ion collection surface of EHD liquid propeller part is included in the surface of flat collector electrode basically of said corona discharge electrode downstream extension.Minimize in the little form factor design of the channel height that flows in pursuit, the collector electrode surface can be positioned as against said flow channel, perhaps can partly limit the relative wall of flow channel.In some cases, collector electrode can be used as heat transfer surface and has difunctional.The ion collection surface of fluid permeable can be provided in some cases.In some cases, the collector electrode of line style or bar type can be introduced in the flow channel, with replace or append in addition along conduit wall near electrode surface on.

In the ordinary course of things, the surface of collector electrode can make with any suitable electric conducting material, such as aluminium or copper.In addition; Become like the available high-resistance material system of United States Patent (USP) 6,919, the 698 described collector electrodes (being called " acceleration " electrode in the literary composition) of Krichtafovitch; Rapid conduct electricity corona current; But consequently the voltage along the current path of said high-resistance material body descends, and makes surface potential descend, thereby suppresses or the generation of restriction sparkover.Above-mentioned high electrical resistance examples of material comprises carbon filled plastics, silicon, gallium GaAs, indium phosphide, boron nitride, carborundum, cadmium selenide.Combine United States Patent (USP) 6,919,698 at this, purpose is limited to the material that narration can be used for some collector electrodes of some embodiment.Note that in embodiment more as herein described, can repair or coating (shining in pairs) the high-resistance material surface with whole high resistance.

In the embodiment that adopts line style or bar type collector electrode, metal wire can be made in a plurality of parallel collector electrode surfaces, or is processed by cutting or etched metal, or makes some other mode.In some cases, in addition the conduction dielectric also be acceptable.Usually, the surfacing of this line style or bar type collector electrode conducts electricity, but needs not be good especially conductor.In fact, consistent with the description of ' 698 patents of above-mentioned introducing, quite high-resistance material processed or scribbled to collector electrode can by having quite high-resistance material.Usually, the collector electrode surface should anti-ion bombardment and ozone.For example the precious metal surface of gold (Au) and platinum (Pt) family metal generally is fit to, and nickel and stainless steel also are suitable for.Core material can be identical with the surface, but also can be different.Each line style or bar type collector strand be thick (comparing with emitter electrode) at least quite, and between 50 microns to 200 microns, so the strength of materials can not seem very crucial.In the cross section of collector electrode hour, can select tungsten (W), titanium (Ti), molybdenum and/or their alloy.As for other collector geometry, smooth surface is desirable.

In the embodiment that adopts line style collector electrode (it has meticulous line style cross section and adopts the original position cleaning/finishing of frictional engagement to protect to it); More desirable is the machine work electrode of mechanically robust; This kind electrode has high-intensity electrode cores material (like titanium, steel, tungsten, tantalum, molybdenum, nickel and contain the alloy of these metals), covers the layer of the firm palladium (Pd) of the hard electrochemistry of one layer or more, other platinum (Pt) family metal, palladium nickel (PdNi) above that.In some cases, in the collector electrode design, also can adopt emitter electrode material and metallurgy (seeing above) to handle, corrode to bear friction cleaning/finishing and/or anti-corona.

The design of EHD air mover

Fig. 2 (in schematic form) illustrates an exemplary configuration; Wherein high voltage source 190 is coupled between emitter electrode 191 and the collector electrode 192 so that produce electric field; And produce ion in some cases, so that on the cardinal principle downstream direction, promote to produce fluid stream 199.In the drawings, emitter electrode 191 is couple to the positive high voltage terminal (exemplary value is+3.5KV that actual design can be selected any power source, voltage, waveform for use) of power supply 190, and 192 of collector electrodes couple local ground connection.The narration of the suitable design of power supply 190 can be referring to the previous United States Patent (USP) 6,508,308 that combines.Comprise sizable voltage difference and very short distance (perhaps 1mm or following) between the surface, forward position in view of emitter 191 and collector electrode 192, so produced highfield, the positive charge ion in fluid (or particle) has applied clean downstream motive force.Field line (substantially) illustrates the aspect, space of total electric field, and the spacing of shown field line can be represented electric field strength.

Understand as those of ordinary skill in the art, can use principle of corona discharge in highfield, to produce ion near the surface of said corona discharge type emitter at the utmost point.Therefore; In corona discharge type embodiment according to Fig. 2; Near the emitter 191 fluid molecules (such as the ambient air molecule) are ionized, and consequent positive charge ion can quicken towards collector electrode 192 in electric field, in this process with the neutral fluid molecular collision.As the result of collision, momentum to the neutral fluid molecule, causes fluid molecule correspondingly to move along clean downstream direction from ion-transfer.The ion of positively charged then attracted to collector electrode 192 and is neutralized, and the fluid molecule of said neutralization passes through collector electrode 192 (shown in fluid stream 199) with the speed of bump.The fluid motion that produces through principle of corona discharge has various appellations, like " " wind, " corona " wind or " ion " wind, is restricted to substantially near the gas motion that ion motion caused the high-voltage discharging electrode.

Although the emphasis of narration is the configuration of corona discharge type emitter; But those of ordinary skill in the art will be appreciated that and can pass through other technique for generating ion; Such as silent discharge, alternating current discharge, dielectric barrier discharge (DBD) or the like, after in a single day said ion produces, just as described herein; Can be successively be accelerated having under the situation of electric field, so that propelling fluid stream.For fear of doubt, the emitter among all embodiment is not necessarily corona discharge type.Equally for fear of doubt, the only pure illustration that rises of size, polarity and waveform (if any) with respect to the supply voltage of specific embodiment narration might be different from other embodiment.

Adjust the electric field of previous description and/or, can further understand some embodiment as herein described with some surfaces of upper reaches setting near being used in emitter electrode 191 for the ion that upstream moves provides potential barrier.For example,, dielectric surface 193 can be set, be easy to accumulate positive charge (such as from corona discharge type emitter 191 or other local ion that produces) on it with respect to shown in Figure 2.Because dielectric surface 193 is not provided to the attraction path of ground connection, thus be easy to accumulate clean positive charge, and repel identical electric charge playing electrostatic interaction after a while.As a result of, dielectric surface 193 forms the potential barrier that ion upstream moves through electrostatic interaction.The dielectric surface 193 at the upper reaches tends to any other the attraction path that leads to ground connection of electrostatic screen, thereby can mainly adjust upward aforesaid electric field in the downstream side towards collector electrode 192.Randomly, in certain embodiments, the conductive path 194 of one or more ground connection can be set, so that catch the ion that still can upstream move at dielectric surface 193 upper reaches far away.In the embodiment of some ventilation units, the conductive path 194 of described ground connection can be arranged on air inlet near.

Narration according to the front can be found; Because the thickness that the thermal management scheme can be used within the form factor of commercial requirement and design is very limited; Electrostatic operation surface (such as collector electrode or electric field adjustment charge-trapping surface) forms exposed surface; Perhaps on exposed surface, form, this helps to save several millimeters precious thickness, otherwise said several millimeters thickness will be wasted in more traditional design; In traditional design, electrode can be encapsulated in the wall of sub-component of EHD air mover.

General low profile display unit

Though it is contemplated that various thin, low profile display unit, comprise portable panel computer or palmtop computer, plate display screen is very useful at the context of describing the utility model.Fig. 3 A and 3B are respectively the edge side view and the perspective views of exemplary flat panel display type consumer electronics device 1400, according to some embodiments of the utility model, the EHD liquid propeller are contained among the body part 1401A that gross thickness is d.In Fig. 3 A; Exemplary flow become a mandarin 1402 with flow out stream 1403 and promoted by EHD air propeller 1410 and flow through said consumer electronics device, said EHD air propeller 1410 is that some inventive concepts according to the utility model design and are encapsulated within the limited inner space.In certain embodiments, to allow gross thickness d only be 5-10 millimeter or following EHD air propeller 1410 for available internal volume and/or assembly.

Certainly, shown being used to flow into, flow out stream and and the position of heat transfer surface 1420 pure as demonstration, say that more substantially the ventilation border can be limited the internal placement of parts, the heat challenge of specific device structure and/or the factor of industrial design.The embodiment that Fig. 4 A shows is basically with consistent shown in Fig. 3 A and the 3B; The elongated lighting source array (LED luminaire 1550) that wherein is positioned at the edge produces heat; Import in the air-flow (1402,1403) that promotes through EHD air propeller 1410A, 1410B with convection type through heat transfer surface 1420 during operation.Shown in structure in, the EHD air propeller embodiment (1410A) that installs in the bottom forces air in the shell of the bottom of consumer electronics device 1400, the EHD air propeller embodiment (1410B) that installs at the top is the air-out from the top then.

The embodiment of above-described TV formula display screen consumer electronics device only plays illustration.In fact; According to this specification; Those of ordinary skill in the art will be appreciated that these and other device of the inventive concept of using the utility model; Comprising modification and/or remodeling, they are applicable to given shape factor, electronic building brick type and layout, heat dissipation problem and/or the industrial design factor relevant with particular design.In view of the foregoing, will forward at present be suitable for being integrated into shown in the design of EHD air mover within the limited thickness of consumer electronics device.

Television set or display unit embodiment

Substantially with reference to return Fig. 3 A, 3B and 4A and wherein shown in exemplary panel display apparatus 1400; Explain that through Fig. 4 B and 4C (with the sectional view mode) is used for the structural arrangements of EHD air mover on lower part and the top of display unit now; The electrostatic operation of this design partly forms the surface within the crust of the device, perhaps on the surface within the crust of the device, forms.In some cases, at least one electrostatic operation partly forms the exposed interior surface of shell itself, perhaps on said exposed interior surface, forms.In some cases, at least one electrostatic operation partly forms the exposed surface of EMI shielding, or on said exposed surface, forms, and wherein said EMI shielding overlay electronic assembly is such as display screen.Under each situation, through electrostatic operation is partly formed said surface, or on said surface, form, EHD fluid/air pusher is accommodated within the very limited inner space.

For example, in panel display apparatus 1400, the total depth d of cross section 4B and 4C can be less than about 10 millimeters.Look back the perspective view of Fig. 4 A with wherein shown in top and the EHD air mover of lower part, in the cross section 4B shown in Fig. 4 B, the whole internal depth of cardinal principle is used to hold the EHD air mover 1410A of lower part.Likewise, in the cross section 4C shown in Fig. 4 C, the EHD air mover 1410B on display screen surface 1401 and top all is contained in the degree of depth of panel display apparatus 1400.Shown in from the end to the top air-flow; The EHD air mover 1410B on top is contained in display screen surface 1401 space behind; Therefore, the functional part of its electrostatic operation more closely encapsulates than the similar functions parts of the EHD air mover 1410A of said lower part.However, the design of corresponding air mover and operate substantially the same.

In some cases, display unit is plate or the palmtop computer device.

In some embodiment of panel display screen 1400, conduction (like metal) band or bar Pasting on substantially nonconducting shell or its surperficial inner surface, and be couple to to limit each collector electrode 192.In the ordinary course of things, conductive strips or bar can be cut into shape and the length that collector electrode 192 requires.In addition, non-conductive (for example dielectric) layer that covers ground connection conduction (like metal) layer or zone can be etched or optionally be removed, and has the shape that collector electrode 192 requires and the surface of length so that expose.In some cases, ground connection conductive layer or zone can be shells 1409, perhaps can be integral with said shell 1409.

For EHD air mover 1410A and EHD air mover 1410B; The embodiment of corresponding collector electrode 192 and emitter electrode 191 is coupled in high voltage source and (does not illustrate clearly; But make an explanation with respect to Fig. 2 substantially) terminal between so that produce electric field and (in the embodiment of the corona discharge type shown in figure) ion, promote air-flow at the downstream direction that is making progress substantially as shown.In some embodiments, emitter 191 embodiment can be coupling in the positive high voltage end (exemplary value is+3.5KV, and actual design can be selected any power source, voltage, waveform for use) of power supply, the collector electrode 192 embodiment local ground connection that then is coupled.The operation of EHD air mover 1410A and 1410B is substantially as described the same with reference to Fig. 2.

Though available internal volume and tolerance depend on execution mode and design usually, just can understand that according to accompanying drawing and this specification thin panel display apparatus can be accepted gross thickness d _EHDBe 4 millimeters or following EHD air mover (EHD air mover 1410B particularly; See Fig. 4 C).

In the configuration of describing herein; The one-way gas flow of discharging (1403) from the bottom entering (1402) of panel display screen 1401 with at its top is provided; The relevant position that the EHD air mover then is positioned at the upper reaches of fin 1420 promotes air-flow; Said fin heat is couple to the elongated lighting source array (LED luminaire 1550) of location on the edge of, and the heat that this lighting source array produces is quite most of can discharge from shell 1409.Though this air-flow and this location are placed in the display screen 1401 more limited degree of depth behind EHD air mover 1410B; But this makes the material (like ozone reduction catalyst or reactivity material) that reduces ozone can be placed on the downstream of two lip-deep air mover; Such as fin 1420 itself (or radiator, LED illumination component or the like), their area of heating surface helps to increase the usefulness of ozone reduction.

In Fig. 4 A; Exemplary flow become a mandarin 1402 with flow out stream 1403 and promoted by EHD air propeller 1410 and flow through said consumer electronics device, said EHD air propeller 1410 is that some inventive concepts according to the utility model design and are encapsulated within the limited inner space.In certain embodiments, to allow gross thickness d only be 5 millimeters or following EHD air propeller 1410 for available internal volume and/or assembly.

Certainly, shown being used to flow into, flow out stream and and the position of heat transfer surface 1420 pure as demonstration, say that more substantially the ventilation border can be limited the internal placement of parts, the heat challenge of specific device structure and/or the factor of industrial design.The embodiment that Fig. 4 A shows is basically with consistent shown in Fig. 3 A and the 3B; The elongated lighting source array (LED luminaire 1550) that wherein is positioned at the edge produces heat; Import in the air-flow (1402,1403) that promotes through EHD air propeller 1410A, 1410B with convection type through heat transfer surface 1420 during operation.Shown in structure in, the EHD air propeller embodiment (1410A) that installs in the bottom forces air in the shell of the bottom of consumer electronics device 1400, the EHD air propeller embodiment (1410B) that installs at the top is the air-out from the top then.

Fig. 4 B and 4C figure (with the mode of sectional view) illustrates the configuration of EHD air propeller on lower part and the top of display 1400.As aforementioned, in some cases, at least one electrostatic operation of EHD air mover partly forms the inner surface of shell itself, perhaps on said inner surface, forms.In some cases, at least one electrostatic operation partly forms the surface of EMI shielding, or on said surface, forms, and said EMI shielding covers such as electronic building bricks such as circuit boards.Also as aforementioned, the U.S. Patent application No.13/105 that submits on May 11st, 2011 that this design is mentioned at preceding text has detailed description in 343.Under any circumstance; Design can be contained in the very limited inner space of display unit 1400 such as above-described EHD air propeller, perhaps be contained in one-piece type or the similar limited inner space of Tablet PC device, smart mobile phone, media player, reader or the like in.

Forward exemplary panel display apparatus 1400 then to, the total depth d of cross section 4B and 4C can be less than about 10 millimeters.Look back the perspective view of Fig. 3 A with wherein shown in top and the EHD air propeller of lower part, in the cross section 4B shown in Fig. 4 B, the whole internal depth of cardinal principle is held the EHD air propeller 1410A of lower part.Likewise, in the cross section 4C shown in Fig. 4 C, the EHD air propeller 1410B on display screen surface 1401 and top all is contained in the degree of depth of panel display apparatus 1400.Shown in the air-flow the end of to the top, the EHD air propeller 1410B on top is contained in display screen surface 1401 space behind, therefore, more closely encapsulates than the like of the EHD air propeller 1410A of lower part.Consistent with the cross section shown in Fig. 4 C that encapsulates more compactly.

The embodiment of plate device

Except the panel display screen type embodiment of above detailed description, it is understandable that portable panel computer or palmtop computer (tablet or pad) can benefit equally from the design according to the utility model.Fig. 5 A shows an exemplary panel computer 1400C, wherein can dispose the configuration of (as described herein) EHD air mover.In certain embodiments, the device storehouse of panel computer or palmtop computer configuration is consistent with above-mentioned shown in Fig. 4 A and/or the 4C those.In the configuration of some panel computers or palmtop computer, the glass of display screen surface 1401 (being embedded in the casing frame) extends with the edge edge mode of keeping to the side along the front surface of panel computer or palmtop computer haply.

Fig. 5 A has shown this exemplary panel computer 1400C, and wherein the EHD air mover is deployed as the periphery towards device, and in said device, the display screen of embedding defines the front surface of shell at least in part.Fig. 5 B then illustrates exemplary cross section 5B, passes this cross section 5B, and it is depth d that said board device can accept to install total depth d _EHD=4 millimeters or following EHD air mover (particularly EHD air mover 1410C).What can further understand is, the embodiment of panel display screen type can adopt edge the keep to the side glass and device stack arrangement of edge similarly, and the configuration shown in panel computer 1400C is the same.

Other EHD air mover design

Fig. 6 illustrates a kind of embodiment of EHD air mover, wherein uses the collector electrode geometry that substitutes.More particularly, Fig. 6 shows the cross section view of a plurality of lines or bar type collector electrode 892, and said line or bar are arranged to array, stride across the lateral length of flow channel.In the drawings; Six substantially parallel collector electrodes 892 are arranged; They are positioned as the ion flow of the self-electrode electrode 191 of collecting, and wherein each collector electrode has longitudinal length and all collector electrodes are arranged to stride across the flow channel that is formed by upper strata to lower floor dielectric surface 193 together.As previously mentioned, emitter electrode and collector electrode (being 191,892) obtain behind the energy to promote to produce fluids stream along downstream direction 199 roughly here.For fear of the shielding electrode geometry; Omitted being connected of supply voltage and each collector electrode instance, though those skilled in the art can understand: the longitudinal length of collector electrode 892 allows above-mentioned connection to pass dielectric sidewall (in cutaway view, not drawing specially).Based on above-mentioned explanation, can understand the design and the operation of modification shown in Figure 6 fully to other embodiment.

Usually; Can configure a kind of EHD air propeller embodiment according to Fig. 6 and collector geometry shown in Figure 7; Wherein dielectric top and base wall surface 193 is compared with illustrated actual conditions that are positioned at the collector instance on the wall before, and its spacing distance is tightr.Specifically; Because the embodiment shown in previous is (vertical direction) of dwindling; Increasing ion flow (from emitter electrode 191) impinges upon the nose of an ox surface, forward position of collector electrode 192, is the design that cooperation is dwindled, and said collector electrode has less nose of an ox radius; Also promptly for ion flow, the surface area of its bump is more and more littler.Therefore, if a plurality of collector electrodes 892 stride across most of height of flow channel, can bigger accumulation surface area be provided for ion collection.In some cases, help to make according to Fig. 6 and collector geometry shown in Figure 74 millimeters or following channel height d can be provided _EHDDesign.In some cases; Emitter and collector electrode (191; 892) can use the line (for example scribbling the W line of PdNi) with similar components to form, though the diameter of collector electrode line is 50 microns to 200 microns, the diameter at least two (2) that surpasses the emitter electrode line usually doubly.Therefore, in certain embodiments, to use core material and surfacing possibly be unnecessary and costliness in order to optimize extremely meticulous emission polar curve configuration.

Usually, the surfacing of collector electrode 892 conducts electricity, but needs not to be good especially conductor.In fact, the same with the description of above-mentioned ' 698 patent of mentioning, quite high-resistance material layer processed or scribbled to collector electrode 892 can with quite high-resistance material.Usually, the surface of collector electrode 892 should anti-ion bombardment and anti-ozone.For example precious metal surfaces such as gold (Au) and platinum (Pt) family metal normally are fit to, and nickel and stainless steel also are suitable for.As previously mentioned, in certain embodiments, can adopt the core material of different component.Each collector electrode 892 can compare slightly (to be compared with emitter electrode) at least; Between 50 microns to 200 microns; Therefore for the collector electrode line, because of the additional strength that core provided that contains tungsten (W), titanium (Ti), molybdenum (Mo) becomes so unimportant.

Other embodiment

Though with reference to example embodiment the technology and the execution mode of EHD device as herein described had been made narration already; But it will be understood by those skilled in the art that; Can under the protection range that does not deviate from accompanying claims, carry out various change and replace parts wherein with equivalent.In addition, do not departing under its essential scope, can carry out many modifications to the instruction of the utility model, to adapt to specific situation or material.Therefore, specific embodiment disclosed herein, execution mode and technology, some imaginations are used to realize the preferred mode of said embodiment, execution mode and technology, are not in order to limit the protection range of accompanying claims.

Claims (24)

1. electronic installation with display screen surface and electrical fluid fluid pusher comprises:

Surface behind display screen front surface and the relative shell; Define device thickness between them, wherein pass the first cross section part of said device thickness and mainly form by the said display screen that roughly is layered arrangement, electrical fluid (EHD) fluid pusher and said shell;

Wherein, Said EHD fluid pusher is constructed to the part of the thermal management of said electronic installation; Comprise at least one emitter electrode and one or more collector electrode; Said emitter electrode is positioned near said one or more collector electrode, and ion is quickened towards said one or more collector electrodes, thereby in electronic installation, promotes to produce fluid stream.

2. according to the electronic installation of claim 1, be characterised in that said electronic installation is constructed to one of lower device or multiple:

Panel display apparatus;

Television set; With

One-piece type computer, panel computer or palmtop computer.

3. according to the electronic installation of claim 1, be characterised in that,

Said device thickness is less than about 10 millimeters.

4. according to the electronic installation of claim 1, be characterised in that,

The thickness of said EHD fluid pusher accounts for said device thickness less than about 4 millimeters.

5. according to the electronic installation of claim 1, be characterised in that,

The quantity of said collector electrode is at least two, and wherein first collector electrode forms the exposed interior surface of said shell or on the exposed interior surface of said shell, forms.

6. according to the electronic installation of claim 1, be characterised in that,

The thickness of getting rid of the material on surface behind glass and the said relative shell of said display screen front surface; The whole said device thickness of passing said first cross section is limited said EHD fluid pusher basically, and the thickness of said EHD fluid pusher is less than about 4 millimeters.

7. according to the electronic installation of claim 1, be characterised in that,

Said first cross section comprises the edge glass part of said display screen, does not have dorsal part display or illumination component basically.

8. according to the electronic installation of claim 1, be characterised in that, also comprise:

The heat transfer path that in flow path, is provided with, said heat transfer path is made up of one or more thermals source to the heat transfer surface that is positioned at said shell, and said EHD fluid pusher promotes to produce fluid stream along said flow path when obtaining energy.

9. according to the electronic installation of claim 1, be characterised in that,

Said shell seals said electronic display unit basically, so that the fluid stream that is produced by said EHD fluid pushers is included within the said shell and recirculation therein basically.

10. according to the electronic installation of claim 1, be characterised in that,

Said shell allows at least some fluid flows to cross internal volume and the border between the outside in said shell.

11. the electronic installation according to claim 10 is characterised in that,

Said shell comprises one or more aeration portions on said border, and whole basically fluid fluxs by said EHD fluid pushers assign to get into and discharge through said ventilation unit.

12. the electronic installation according to claim 1 is characterised in that,

One of in the circuit board in the enclosure and the inner surface of said shell or both at least a portion apply the material that ozone is had catalytic action or reactivity.

13. the electronic installation according to claim 1 is characterised in that,

Also be included in the heat transfer path that is provided with in the flow path, said heat transfer path is made up of the thermal source in the said shell to heat transfer surface, promotes to produce fluid stream along said flow path during said EHD fluid impeller operated.

14. the electronic installation according to claim 13 is characterised in that,

Said heat transfer path one of comprises in heat pipe and the radiator or both.

15. the electronic installation according to claim 13 is characterised in that,

At least a portion of said heat transfer path applies the material that ozone is had catalytic action or reactivity.

16. the electronic installation with display screen surface and electrical fluid fluid pusher comprises:

Relative shell front surface portion and back surface portion; Define device thickness between them, second cross section of wherein passing said device thickness mainly is made up of the back surface portion of front surface portion, electrical fluid (EHD) fluid pusher and the said shell of the said shell that roughly is layered arrangement; With

Be embedded in the display screen surface in the front surface of said shell;

Wherein, Said EHD fluid pusher is constructed to the part of the thermal management of said electronic installation; Comprise at least one emitter electrode and one or more collector electrode; Said emitter electrode is positioned near said one or more collector electrode, and ion is quickened towards said one or more collector electrodes, thereby in electronic installation, promotes to produce fluid stream.

17. the electronic installation according to claim 16 is characterised in that, said electronic installation is constructed to one of lower device or multiple:

Panel display apparatus;

Television set; With

One-piece type computer, panel computer or palmtop computer.

18. the electronic installation according to claim 16 is characterised in that,

Said device thickness is less than about 10 millimeters.

19. the electronic installation according to claim 16 is characterised in that,

The thickness of said EHD fluid pusher accounts for said device thickness less than about 4 millimeters.

20. the electronic installation according to claim 16 is characterised in that,

The quantity of said collector electrode is at least two, and wherein first collector electrode forms the exposed interior surface of said shell or on the exposed interior surface of said shell, forms.

21. the electronic installation according to claim 16 is characterised in that,

Said shell seals said electronic display unit basically, so that the fluid stream that is produced by said EHD fluid pushers is included within the said shell basically.

22. the electronic installation according to claim 16 is characterised in that,

Said shell allows at least some fluid flows to cross internal volume and the border between the outside in said shell.

23. the electronic installation according to claim 16 is characterised in that,

Said EHD fluid pusher has occupied the major part of overall apparatus thickness.

24. the electronic installation according to claim 16 is characterised in that,

The front surface portion of getting rid of said shell and back surface portion and the thickness that is embedded in any insertion portion of the said display screen surface in said second cross section, said device thickness is made up of said EHD fluid pusher basically.

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