CN1082242C - Thin-type image display device - Google Patents
Thin-type image display device Download PDFInfo
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- CN1082242C CN1082242C CN91100134A CN91100134A CN1082242C CN 1082242 C CN1082242 C CN 1082242C CN 91100134 A CN91100134 A CN 91100134A CN 91100134 A CN91100134 A CN 91100134A CN 1082242 C CN1082242 C CN 1082242C
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- electron
- wall
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- electron channel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/123—Flat display tubes
- H01J31/124—Flat display tubes using electron beam scanning
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Abstract
Picture display device having a vacuum envelope with a front wall supporting a luminescent screen at its inner side and a rear wall at a short distance therefrom, connected by side walls. The envelope accommodates a plurality of adjacent electron sources and juxtaposed, local electron ducts cooperating with these sources and having walls of substantially electrically insulating material having a secondary emission coefficient which is suitable for transporting, through vacuum, produced electrons in the form of electron currents. Means are provided to make each electron current substantially travel along a particular wall of its electron duct, as well as means for withdrawing each electron current at predetermined locations from its duct and directing it towards the luminescent screen for producing a picture composed of pixels.
Description
The present invention relates to a kind of image diplay with vacuum envelope, be used on phosphor screen, showing the image of forming by pixel, more particularly, relate to a kind of thin image diplay (being its " front and back size " little image diplay), it and existing display have tangible difference.
The typical prior art approximate with thin-type image display device is the display with a transparent panel and back plate, panel is interconnected by dividing plate with the back plate, inboard at panel scribbles phosphor pattern, and the one side scribbles conductive layer (this combination also is referred to as phosphor screen).If (being controlled by vision signal) electronic impact then forms a visible image in front side by panel to phosphor screen.This panel can be flat, if desired, also can be crooked (for example, spherical or cylindrical).
A kind of particular type of thin-type image display device is to use a branch of or the multibeam electron bundle, these electron beams begin to be arranged essentially parallel to the display screen plane and extend, thereby bend towards subsequently that display screen makes electron beam direct or by means of for example selecting lattice structure to drop on desirable zone on the phosphor screen.(described electron beam is interpreted as that the path of this intrafascicular electronics is substantially parallel, promptly has only a low-angle ground to extend mutually, and electronics is arranged along its principal direction that moves), the display of the controlled electron beam work of above-mentioned usefulness especially needs complicated electro-optical structure.
And, if big slightly (channel plate) matrix type electron multiplier that needs a complexity usually of single electronic beam type image diplay screen dimensions.
In view of the foregoing, an object of the present invention is to provide a kind of thin-type image display device that does not have the aforementioned display device shortcoming basically.
According to the present invention, a kind of image diplay with vacuum envelope, be used on phosphor screen, showing the image of forming by pixel, it comprises a plurality of juxtaposed electron sources that are used to produce electronics, the local electronic passage that match with electron source and its wall is made up of the material of electric insulation basically, this insulating material has a secondary emissionratio, be suitable for transmitting the electronics that produced by vacuum with the form of electron stream, and in order to every beam electrons stream is taken out from predetermined (particular order) position of its passage and the guiding phosphor screen in order to produce the device of the image of forming by pixel, electron channel has electrode assembly and is used for generation axial electric field Ey and transverse electric field Ex in working order.
The method that the invention provides thin-type image display device is based on such discovery, if promptly at the electric field that vertically adds enough power (for example applying electrical potential difference) at interval at the interval longitudinal component, when making electronic impact, find that it is possible that electronics transmits to when being the wall portion of the determined elongated vacuum chamber of wall (so-called layout) formed of electrical insulating material (for example glass or plastics) basically.Impingement of electrons produces secondary electron by interacting with wall, and these secondary electrons attracted to farther wall portion and then produce secondary electron by interacting with wall.As will be described further, can select environment (the secondary emissionratio δ of the resistance of electric field strength, wall, wall) like this so that the vacuum current at interval is constant.
By taking out electronics from a plurality of adjacent electron streams in desirable position and guide them into phosphor screen, thereby on phosphor screen, form image.It is important making electronics in the passage not have too high speed in this case.If a plurality of electronics speed when transmitting by electron channel is too high, this will cause shielding the image loss contrast.Speed is too high to be because with the elastic collision (back scattering) of wall or because the low electronics of initial velocity contact with wall or the suitable distance of having moved (greater than several millimeters), and obtains behind the increasing energy ability on the way and meet with wall and take place.For avoiding it, electron channel according to the present invention has electrode assembly and is used for producing in working order axial electric field (Ey) and transverse electric field (Ex).Thereby reach the purpose of every beam electrons flow restriction at the longitudinal region of pressing close to conduit wall.We can say that electronics " jumping " in transmission is crossed described wall, reaches the expectation effect.
First embodiment of display is characterised in that according to the present invention, electron channel is made of elongate cavity, cavity is limited by the wall of the material of the electric insulation basically with secondary emissionratio δ, be provided with many extraction apertures at each cavity facing to fluoroscopic side, so that all extraction apertures constitute the arrangement of row and column together.In this case, δ and E have and can make the value of electric transmission by cavity.By to the capable electrode that sequentially provides of extraction aperture, form a choice device, described these electrodes are executed by means of first (just) voltage (pulse), electron stream is taken out from cavity by delegation's extraction aperture, if perhaps do not have the part of electronics from cavity to take out then this electrode is executed by second (lower) voltage.Can guide phosphor screen into by applying an accelerating voltage by the electronics that this choice device is pulled out from cavity.Electrode assembly also can be used to provide an electromotive force that increases progressively across (linearity) away from fluoroscopic (back) wall and cross-span (linearity) similarly of fluoroscopic (preceding) wall increased progressively but lower electromotive force.Electric field Ey and Ex produce like this.For example, the rear wall electromotive force can accurately limit by means of the high-ohmic resistance layer that is added on the rear wall.This resistive layer can have tortuous or zigzag pattern to increase resistance.A kind of available method is to select such material to make in electronic transmission process the application to the rear wall electric charge that produced become possibility for rear wall.The electromotive force of antetheca can be adjusted, and for example, by providing many parallel for example banded electrodes in the electron channel of screen side, these electrodes can provide the electromotive force that an approximately linear increases progressively during operation.These electrodes also can be used for promote selecting (image) line, and its method is by extraction aperture for example being set in these electrodes and they being connected to a circuit, in order to (positive) selection voltage to be provided.
These electrodes for the purpose of satisfied definition and contrast further can be multiplet and (perhaps) they have to screen and extend and the electrode assembly coaxial with extraction aperture.
All electron streams that produced by electron source should be directed crossing the part of the height between the phosphor screen top edge and bottom at least in electron channel.For this purpose, can provide delegation's electron source or multirow parallel electron source.
Each electron source can be placed on and make it in the electron channel to match, but preferably each electron source is placed on the outside that faces the electron channel inlet portion that makes it to match.
By electron source with and the inlet portion of its electron channel of matching between apply enough big positive electricity pressure reduction, the electronics that is penetrated by electron source is accelerated towards electron channel, they produce secondary electron by means of the interaction with wall in electron channel subsequently.
Suitable electric potential forces electronics " jumping " to cross wall in the demonstration that is proposed.When launching, can reach number of electrons at a high speed owing to the effect that its direction at wall is subjected to electrostatic force is limited with this pattern.
In electron channel, the speed that electronics to increase, in electronics and the approaching speed that is equivalent to the 30eV energy of the moment of wall collision, this equals secondary emissionratio and equals the energy that possessed at 1 o'clock.The electronics admission passage that has than macro-energy may cause the contrast problem, and this is to have macro-energy like this to selecting electrode and shield to move so that they can overcome opposite direction (Ex) and arrive to shield to go up undesirable position after back scattering on the wall because of them.
According to the feature of a most preferred embodiment of display of the present invention be each electron source with and its electron channel inlet portion of matching between placed speed limiting device, guarantee that to a certain extent electrons emitted must pass electron channel with any wall collision.
By for example with electronic emitter with respect to the wall arrangement of electron channel at angle then electronics be impossible with the high speed admission passage.When their admission passages collide once with wall at least immediately.Set up " the shape sudden turn of events of electronics " (" electron chicane ") by this way.An embodiment based on this thought is characterised in that speed limiting device comprises a wall portion, and it is to settle like this: the secondary electron that produces during making electrons emitted and its collision and making collision and the wall of electron channel collide.
Another kind of electric scheme is that the electronic emitter that matches with drive electrode is arranged, and they settle and execute electricity by this way, even electronics is towards the wall emission of the inlet portion of electron channel.
Another kind of magnetic scheme is that electronic emitter is matched with magnetic field generation device, and this device produces magnetic field and makes the wall of electrons emitted deflection electron channel inlet portion.
A kind of (line) that is parallel to a plurality of electronic emitters of phosphor screen (limit) arranged and can be used to make in electron channel the electron stream of generation to pass the vacuum transmission.Hot cathode and cold cathode such as field emission device all are suitable for this purpose.
The electronics that takes out in turn with line from electron channel can make electronics quicken (as bundle) directive phosphor screen by add enough big voltage difference (for example 3KV) between electron channel and screen.Can once write a picture lines like this.Video information (gray scale) can be represented with the form of for example pulse width modulation.Distance to screen can be very little so that image point is little.By acceleration that the positioning of beam structure can make extraction each positioning of beam towards screen is provided, this location structure adopts the version of level between electron channel and phosphor screen for example and/or vertical wall.
Importance of the present invention is if electron channel has sidewall, and these sidewalls also are used as inner vacuum and support, and therefore (for example＜10mm) compare and will approach by gross thickness with those known thin-type image display devices for the front and rear wall of image diplay of the present invention.In this, an embodiment is characterised in that, the vacuum sealing shell comprises that a fluoroscopic transparent panel of its medial support and one are placed in the back plate with panel close proximity place, front and rear panel interconnects with dividing plate, panel and the back space between plate holds inner vacuum to be supported, and it is that sidewall by electron channel constitutes that part supports.Another part that vacuum supports can be made of the positioning of beam wall system, and this system extends between the wall of panel and electron channel, and the wall of it and electron channel at angle.
Another embodiment is characterised in that, vacuum supports the option board that comprises that the electrical insulating material that is provided with extraction aperture is made, and wherein the wall of electron channel keeps option board and back plate to be separated.Option board can be to fill out the slab that is placed between electron channel wall and the panel.Perhaps, this option board can approach, and the positioning of beam wall device that makes panel and option board keep being separated can be between option board and panel.In this case the positioning of beam wall can be for example laterally and/or be parallel to the electron channel wall and extend.
To be described in more detail with reference to the accompanying drawing some embodiments of the present invention, label identical in the accompanying drawing is used for components identical.
Fig. 1 is the schematic perspective view according to image diplay part-structure of the present invention, and part is cut open, and its element is not drawn in proportion;
Figure 1A is the side cutaway view of Fig. 1 structure, illustrates general operation of the present invention;
Figure 1B has shown (selection) electrode arrangement that is used in Fig. 1 structure;
Demonstration is used for operation and the voltage pattern of the specific electron passage of Fig. 1 structure for " vertical " cross section to Fig. 2 A with 2B;
Fig. 3 has shown that this is characteristics of the present invention as the curve of the function of original electron ENERGY E p, wall material secondary emissionratio δ;
Fig. 4 is part-structure " vertically " sectional view of another program of Fig. 2 A structure;
Fig. 5 has shown another program of Fig. 1 structure;
Fig. 6 has schematically shown the large-area planar screen display of being made up of a plurality of display modules of the pattern according to the present invention; And
Fig. 7 has schematically shown the image diplay according to another kind of scheme of the present invention.
Fig. 1 and 1A represent that according to a kind of thin-type image display device 1 of the present invention it has a display floater (window) 3 rear wall 4 relative with described panel with its position.An electron source apparatus 5 for example provides the filamentary cathode of the separation reflector of a large amount of electronic emitters (for example 600) or similar number by means of electrode, be presented on the place near wall 2, and wall 2 connects panel 3 and rear walls 4.Each reflector provides relatively little electric current, thereby the negative electrode of many types (cold-peace thermionic cathode) all is suitable for as reflector.Launch and preferably control by vision signal.Another program is that video information is put on the gating structure that is positioned at behind the electron source apparatus (electron source apparatus can be a filamentary cathode in this case).Electron source apparatus 5 is placed in the opposite in the basic feeder connection hole that extends in parallel with screen of delegation, this passage by at interval 6,6 ', 6 " ... wait formation, in this case an at interval corresponding electron source.These be separated with the cavity 11,11 determined by wall ', 11 " ....Each has a wall (preferably rear wall) at interval at least, and suitable high-resistance material constitutes (for example ceramic material, glass, synthetic material-plated film or do not have plated film) and these materials all have secondary emissionratio δ＞1 (see figure 3) in given original electron energy range by having for the purposes of the present invention.The resistance of wall material has such value so that the field intensity in the needed interval in order to electric transmission (Ey) is 100 under the situation of hundreds of volt/cm orders of magnitude, and total current that might minimum in the wall is passed through.In practical embodiments, realized little electric current to 1 microampere.By apply one tens voltage (magnitude of voltage is determined by environment) to hundreds of voltage magnitude at electron source capable 5 and at interval 6,6 ', 6 " between; the electronics from electron source quickens towards septal direction, and they collide with wall in the interval and produce secondary electron subsequently.
The present invention is based on such understanding, if promptly at interval the electric field that vertically adds an enough power (Ey) then in the interval of determining by the wall of the material system of electric insulation basically the vacuum electronic transmission be possible.Electric field is adapted with inciding Electron energy distribution and spatial distribution at interval, make the effective secondary emission rate of spaced walls count δ eff average out to 1 at work.Whenever entering an electronics (on average) in this case just has an electronics to leave, in other words, and the constant and approaching electron stream that equals to enter by electron stream at interval.If the wall material resistance is high (for the situation of all suitable untreated category of glass and polyimide film, phenolic plastics and ceramic material) enough, even wall at interval can not produce or absorb any clean electron stream so that the electron stream that this electron stream equals to enter in very approximate situation.If electric field is greater than for obtaining the needed minimum value of δ eff=1, below thing will take place.In case δ eff is a bit larger tham 1, wall is positively charged (because very little this electric charge of conductivity can not exhaust) anisotropically then.As a result, electronics on average arrives wall in the time of will be than this positive charge not ahead of time, in other words, in the average energy that vertically from electric field, absorbs with smaller thereby oneself adjust to the state of δ eff=1.This is a superior aspect, because the exact value of electric field is not very important, as long as it is greater than above-mentioned minimum value.
Another advantage is at δ eff ≈ 1 state, and at interval the electron stream in is constant and can be by measuring and feedback or make each electron stream at interval make us equating very satisfactorily by electron stream control, thereby can realize visual uniformly on phosphor screen.
Spaced walls towards phosphor screen 7 is made of option board 10 in the embodiment in figure 1, and phosphor screen 7 is placed on the inwall of panel 3 (seeing Figure 1A).Option board 10 have extraction aperture 8,8 ', 8 " ... etc.If do a concrete structure, when using the negative electrode of non-discrete driving, can from the hole of hope, electron stream " be drawn " with " gating " structure.Yet, preferably use with select by parallel, a porose choice-start of selecting voltage to execute electricity electrode (9,9 ", 9 ...) the negative electrode of individual drive of figure cooperation.These selection electrodes can be arranged on the surface of the plate 10 of rear wall 4, or on two surfaces.At latter event, relative (porose) selected electrode preferably by hole 8,8 ", 8 are electrically connected mutually." level " wall 12 separates plate 10 and panel 3 and the electron beam guaranteeing to extract laterally limits.If will select electrode arrangement at plate 10 towards screen 7 surface, then be favourable (for example Figure 1A) if they cover the zone that this surface is positioned at 12 on wall fully.Can realize selecting electrode 9,9 at visual line position ", 9 ..., for example the mode of representing among Figure 1B (have with hole 8,8 ', 8 " ... " level " electrode in coaxial hole).Hole in the electrode generally at least with hole 8,8 ', 8 " ... equally big, if they are big slightly, then to point easily.By means of single negative electrode and select electrode 9,9 ', 9 " ... (matrix) drive and can on screen 7, seek desirable position.The voltage that substantial linear is increased progressively (from negative electrode one side) be added to select electrode 9,9 ', 9 " ... on.When a picture lines must be driven, promptly when electronics must be by a Kong Hangzhong the hole from the moving row of surface current thereafter when the electron stream of arranging takes out, a pulsating voltage Δ U is added on the voltage of this position.Owing to have relative low speed with the collision of its wall, Δ U can lower (for example 100V be to the order of magnitude of 200V) in view of the electronics in the interval.Obtain voltage difference Va in whole interval height under this situation, this voltage difference Va is too little so that can not pull out electronics from the hole.Just can pull out by applying a positive line options pulsed electron of right value.
The thought of crossing rear wall 4 transmission electronics by " jump " specifically illustrates in Fig. 2 A, and Fig. 2 A is another kind of structure " vertically " cross section." jump " phenomenon takes place when longitudinal electric field Ey being arranged and make electronic impact insulator (rear wall 4).By making the insulator charging produce transverse electric field Ex.If use random insulating material, then can not limit field potential and can not suitably control " jump ".Can on insulator, provide a low resistance layer so that limit electromotive force better.Yet this needs very high-power when driving display.An actual solution is that a high-ohmic resistance layer is provided on rear wall.And, preferably with rows of electrodes 46,46 ' ... be placed on the wall of rear wall 4.The electromotive force of a linear increment is added on these electrodes, and this electromotive force is lower than electromotive force relative on the rear wall 4.This rear wall electromotive force can be by applying voltage and regulate establishing thereon high-ohmic resistance layer.Not only produce axial electric field Ey by this way but also produced transverse electric field Ex.Short of electrode 46,46 ' ... in apply selection voltage on any, high-speed thereby the component that electric field Ex provides a sensing rear wall 4 to act on the electric power on the electronics avoids a lot of electronics to obtain.This has contribution to contrast." virtual " electrode is provided for and produces energization electric field Ex in the inlet portion 16 of the electron channel 11 of adjacent cathodes 5, and this electric field advances towards rear wall 4 emitting electrons.Electrode 46,46 ' ... has big relatively hole, to this cylinder 47,47` ... or the bar shaped electric conductor can be connected, thereby avoids pulling at the electronics that takes out the charging problem in the space of screen 7.Positive pulse voltage (selection voltage) by applying an enough numerical value is to desirable electrode 46, can reach the electron detachment spaced cavities 11 that makes these positions and towards the purpose of screen 7.Shown in Fig. 2 A, in these positions, electric field Ex changes direction.For example the plate shape spacer structure of visible its horizontal wall 12 can be placed in the cavity 11 that is separated by wall 49 and shields between 7 in Fig. 2 A.The hole of this plate structure simply mode hold have cylinder 47,47 ' ... strip electrode 46,46 ' ...Another program of this spacer structure be have its hole and strip electrode 46,46 ' ... in the coaxial thick flat board in hole.
As previously mentioned, the electron stream of contiguous rear wall 4 can mechanically be realized located lateral by using (vertically) dividing plate (" sidewall ") between spaced cavities, this dividing plate also supports as inner vacuum, but mode that also can electricity consumption realizes located lateral, for example, by means of on the rear wall that is applied with suitable electromotive force or vertical conductive traces wherein.
The necessity that provides the electric insulation that has aperture to select dull and stereotyped 10 (Fig. 1,1A) has been provided in the structure shown in Fig. 2 A.Replace and make thin metal electrode band porose, this is a kind of simple technology.Hole in these electrode strips should equate mutually on the other hand.Yet also there is identical requirement in the hole in the planar mask of general TV, and this problem has obtained satisfied solving in low-cost mode.
For the structure applications shown in the key-drawing 2A, Fig. 2 B has shown the part of the rear wall 4 that has high resistance measurement layer 48 in this case, simultaneously electrode 46,46 is selected in many bar shapeds " ... be placed in the opposite of this part.Crossing in the work shown in the rear wall 4 partly has for example voltage difference of 200V, changes to downside 300V from upside 500V.High cloudy value resistive layer 48 guarantees that change in voltage suitably limits.Such one deck also has the advantage of structure shown in Figure 1 on the rear wall.Same voltage difference 200V appear at selection electrode group 46,46 in the face of rear wall 4 parts ' ... on, but this is to be condition with opposite that the selection electrode that will transmit a low voltage (being lower than 100V in this case) etc. is placed in position on the rear wall that transmits 500V voltage.For example 300V selects potential pulse of electrode so that this voltage fully surpasses the voltage of rear wall to face portion by give transmitting, and then " jump " electronics of crossing cavity 11 rear walls is drawn out in the position of above-mentioned selection electrode hole.In this case, the selection electrode of order is applied successively select the voltage device that applies of potential pulse to be used for scanning the line parallel with the hole row.Can be used on the picture lines of scanning, selecting pixel with the cavity 11 crew-served devices that are used for single modulation transmitter emission.
The method of making above-mentioned high resistance measurement layer is as follows:
Glass plate is coated with the uniform powder layer of last layer with vitreous enamel particle and RuOx particle or particle-like composition.Can give the structure of a bending of this powder bed by means of for example delineation, photoetching silk screen printing, the glass plate that will have powder bed then is heated to and makes this resistive layer reach desirable resistance.In this way can realize the resistance of megohm/mouth magnitude.In the actual display of correlation type, in this way obtain 10 at rear wall height two ends
7To 10
10The resistance of ohm.But also application examples such as In
2O
3, SnOx, plug with molten metal the transparent as far as possible thin layer of the semi-conducting material of tin-oxide (ITO) or antimony tin oxide (ATO), also can obtain desirable resistance value.This resistive layer also can be used as and the voltage divider of selecting electrode to link to each other.
The material that is used for the electron channel wall must have high resistance and at least at the certain limit E of original electron ENERGY E p
I-E
IIMiddle secondary emissionratio δ＞1 (see figure 3).E
IPreferably low as far as possible, for example one times or times over 10eV.Especially, the glass (E of particular type
IBe about 30eV), ceramic material, phenolic plastics and polyimide film meet this requirement.Having the material that for example suitable coating (for example MgO) do not satisfy this requirement also can use.
Resistance depends on the gain that whether needs electric transmission and electron channel (on the part or on the length overall) and allow to be connected with great total current in the wall relevant with power dissipation.
Using the pattern of electric transmission is unique the best.Resistance between the upper and lower at interval is 10
6With 10
15Between ohm.As another kind of scheme at least the negative electrode sidepiece of electron channel low relatively resistance can be arranged, for example 10K Ω between the 100M Ω with guarantee the gain.Power demand is not higher than 100W in the value of mentioning in the above.
In a given example, by applying the voltage of 3.5KV at its two ends, long 17cm internal diameter 1mm (resistance of whole length is measured as＞10
15Ω) realized electric transmission in the lead glass interval.
Be furthermore noted that conduit wall is made of the electrical insulating material with conformation function and Secondary Emission function.In addition, they can be made of (for example synthetic material) the electrical insulating material with conformation function, and the coating that one deck has the Secondary Emission function (for example quartz or glass or such as the MgO ceramic material) is provided on this material.
The voltage at the electron channel two ends that electric transmission is required increases along with the length of passage.Yet, can reduce this voltage to replace being placed in display " end " portion's (see figure 1) by electron source (line style arrangement) being placed in central authorities.For example the voltage difference of 3KV can be put between passage central authorities and its top with electron stream is drawn " on ", same voltage difference can be added in subsequently between central authorities and the bottom so that electron stream is drawn D score, thereby substitute the voltage difference that when electron source is placed in display " bottom " whole height will apply 6KV.Use many parallel electron sources capable even more useful in this respect.
Hole from electron channel is directed to phosphor screen 7 by the electronics (with the form of " bundle ") of selecting electrode to pull out, once can write a picture lines on screen 7.But the video information application examples is represented as the form with pulse-width modulation.For example available to the negative electrode that matches with electron channel execute the electricity time length represent.For producing a white pixel, for example in this case in whole line period target execute.To be that target is constant in whole line period execute electricity and control its emission level another kind of scheme.When using with reference to Fig. 2 A and 2B described " jumping " pattern, suitable electromotive force forces electronics to skip specific conduit wall.When with this mode activated, can reach electron number at a high speed and be restricted owing to electronics is subjected to the effect of wall direction electrostatic force.
Electronics obtains ever-increasing speed in electron channel, with moment of wall collision near energy corresponding to 30eV, this equals secondary emissionratio is 1 energy.With macro-energy is that energy equals the electronics that G2 electromotive force (it is greater than 30eV) enters electron channel 11 cause the contrast problem after back scattering.
As shown in Figure 4, the inlet portion 16 of electron channel 11 has the wall 15 of the inclination of an electric insulation or electric conducting material, this wall target 5 and drive electrode G1 and G2.This makes the electronics of launching can not be with the high speed admission passage.Electronics is incited somebody to action directly and the inclined wall behind the G2 15 bumps against.Wall 15 is placed by this way so that inlet portion 16 shrinks towards the hole 14 that enters of electron channel 11.Thereby produce a speed limit " the shape sudden turn of events of electronics ".
Also can produce this shape sudden turn of events by diverse ways, for example, realize by this way not having the structure of drive electrode G1 and G2 in the passage of inclined wall part 15 or execute electricity to them by this way so that in the inlet portion 16 total the and wall of negative electrode 5 electrons emitted collide.Another kind may be that the vertical axis of the structure of negative electrode 5 and drive electrode G1 and G2 is extended at angle with the axle with inlet portion 16.The inlet portion here is interpreted as the electron channel part with extraction aperture.
The electron beam that extracts by hole 8 (Fig. 1) can be for example located by means of " level " wall 12 (Fig. 1), " vertically " wall 18 (Fig. 5) or by means of plate shape wall construction (Fig. 2 A).These walls also can provide inner vacuum to support.In the situation that all inner vacuum support front and rear wall can be approach (≤1mm) so that image diplay itself is in light weight.And this image diplay is to the very little for example 1cm of horizontal external dimensions (thickness) of screen.This just provides the possibility of widely applying, in following report illustrated:
Pixel/size 575 picture lines 1000 picture lines are used
600 pixels/line HDTV screen dimensions
It is large-scale in the open that screen dimensions 233 * 1000 μ m 40cm * 50cm 69cm * 118cm living room 1 * 3mm 1.72m * 2m 3m * the 5.3m play occupies the 3.3 * 13mm of institute 5.75m * 6.6m 10m * 17m
Sports ground
Because it is in light weight and (side) wall thin, display according to the present invention also offers a kind of perfect solution of unitization structure of " large-area planar screen ".In other words, as shown in Figure 6, large-area planar screen display 57 can be formed (module jointly forms the array with desired display size) by many displays 58 according to adjacency of the present invention.Distance between the pixel of these modules (=picture element) size, pixel pitch and pixel rows can be relative more greatly.Specifically, pixel pitch and line-spacing make from a module to another block of pixels figure so that continual mode is continuous basically for such value.
Such module can have simple structure.Fig. 7 has shown the example of the part of a possibility structure.The figure illustrates two flat board 50 (rear wall) and 51 (antethecas) that outstanding wallboard is arranged, laterally settle mutually the side of their outstanding wallboard.Some sizes have been provided among the figure as an example.Dull and stereotyped 50 and 51 can be made by ceramic material or glass, and desirable wallboard shape forms in manufacture process simultaneously.For example, plate material can have adhesive and with its injection moulding.Subsequently, with this adhesive heating and sintering.In addition, this flat board can be made by sol-gel process, for example SiO
2Gel forms colloid in mould.After taking-up and drying then is sintering process.
Form electron channel in the space 52 between the wall of on dull and stereotyped 50, holding up.In order to guide electronics on the phosphor screen 53 that is placed in dull and stereotyped 51 inner surfaces desirable position from passage 52, these dull and stereotyped 51 its walls of holding up have the selection track 54,55,56 of electric conducting material ..., they can be driven in pairs.
If necessary, it is that purpose of the present invention has sufficient secondary emission material that high resistance measurement layer 60 is coated with last layer, for example MgO can be provided at dull and stereotyped 50 inner surface.In this respect, the advantage as the metal oxide layer that comprises vitreous enamel of high resistance measurement layer is that the Secondary Emission of this layer own is just fully high for purpose of the present invention usually.
Have only dull and stereotyped 50 or dull and stereotyped 51 can form, and the method that the other part of this display can be other form with above-mentioned method.
Claims (11)
1. the image diplay with vacuum envelope is used for showing the image of being made up of pixel on phosphor screen, and it comprises:
A plurality of juxtaposed electron sources are used to produce electronics,
That matches with the source has a local electronic passage longitudinally, and it has the wall of being made up of the material of electric insulation basically, and this material has a secondary emissionratio, is adapted to pass through the electronics that vacuum is produced with the electron flow form transmission,
Be used for taking out each electron stream and guide it into device that phosphor screen is used to produce the image of being made up of pixel from the passage precalculated position,
Described electron channel has electrode assembly, is used for producing in working order with the axial electric field Ey of the parallel longitudinal of described passage with perpendicular to fluoroscopic transverse electric field Ex.
2. display as claimed in claim 1, it is characterized in that, described electron channel is made of elongate cavity, cavity is limited by the wall of the material of the electric insulation basically with secondary emissionratio δ, be provided with a plurality of extraction apertures at each cavity facing to fluoroscopic side, so that all extraction apertures constitute the arrangement of row and column together.
3. display as claimed in claim 1, it is characterized in that, the described electrode assembly that is equipped with in order to provide one across away from fluoroscopic conduit wall, look along the electromotive force that vertically increases progressively of described passage and cross-span increasing progressively similarly but lower electromotive force to fluoroscopic wall from electron source.
4. display as claimed in claim 3 is characterized in that, settles a plurality of parallel poles in the electron channel of fluorescence screen side, in order to the lower electromotive force that increases progressively to be provided under the situation of linking first circuit.
5. display as claimed in claim 4 is characterized in that, described electrode is provided with Kong Bingke and is connected to second circuit in order to provide one to select voltage.
6. display as claimed in claim 1 is characterized in that, speed limiting device is installed in electron source and (inlet) portion of the electron channel that matches with it between, guarantee that to a certain extent electrons emitted must pass electron channel with any wall collision.
7. display as claimed in claim 6 is characterized in that, described speed limiting device comprises a wall portion, and it is to settle like this, and electrons emitted is collided with it, and the secondary electron that produces during the collision and the wall of electron channel are collided.
8. display as claimed in claim 1, it is characterized in that, vacuum envelope comprises that a fluoroscopic transparent panel of its medial support and one are placed in apart from the very near back plate of described panel, front and rear panel interconnects with dividing plate, holding inner vacuum at panel and back in the space between plate and supporting, it forms to the sidewall of small part by electron channel.
9. display as claimed in claim 8 is characterized in that, described vacuum supports the option board that comprises that the electrical insulating material that is provided with extraction aperture is made, and wherein the wall of electron channel keeps option board and back plate to be separated.
10. display as claimed in claim 9 is characterized in that, option board has two interareas, and rows of electrodes is selected in the bar shaped that is provided with the hole of at least one interarea supports parallel, and these holes and extraction aperture are coaxial.
11. have the large-area planar screen display of many adjacent image diplays as claimed in claim 1, described image diplay jointly forms the array with desired display size.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9000060A NL9000060A (en) | 1989-06-01 | 1990-01-10 | IMAGE DISPLAY DEVICE OF THE THIN TYPE. |
| NL9001266A NL9001266A (en) | 1990-01-10 | 1990-06-05 | Thin type picture display device - has individually ducted parallel electron currents deflected at predetermined locations from their ducts to luminescent screen |
| NL9001266 | 1990-06-05 | ||
| NL9000060 | 1990-10-10 | ||
| NL9002566 | 1990-11-26 | ||
| NL9002566A NL9002566A (en) | 1990-11-26 | 1990-11-26 | Thin type picture vacuum envelope display device - has front wall supporting luminescent screen at inner side rear wall short distance accommodating adjacent electron sources |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1053320A CN1053320A (en) | 1991-07-24 |
| CN1082242C true CN1082242C (en) | 2002-04-03 |
Family
ID=27352335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91100134A Expired - Fee Related CN1082242C (en) | 1990-01-10 | 1991-01-07 | Thin-type image display device |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0436997B1 (en) |
| JP (1) | JP3068653B2 (en) |
| KR (1) | KR910014989A (en) |
| CN (1) | CN1082242C (en) |
| DE (1) | DE69026233T2 (en) |
| ES (1) | ES2086365T3 (en) |
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|---|---|---|---|---|
| US5614781A (en) * | 1992-04-10 | 1997-03-25 | Candescent Technologies Corporation | Structure and operation of high voltage supports |
| US5675212A (en) * | 1992-04-10 | 1997-10-07 | Candescent Technologies Corporation | Spacer structures for use in flat panel displays and methods for forming same |
| US5557296A (en) * | 1989-06-01 | 1996-09-17 | U.S. Philips Corporation | Flat-panel type picture display device with insulating electron-propagation ducts |
| US5489815A (en) * | 1990-05-24 | 1996-02-06 | U.S. Philips Corporation | Flat-panel type picture display device with electron transport ducts and a double selection structure |
| US5525873A (en) * | 1990-05-24 | 1996-06-11 | U.S. Philips Corporation | Picture display device comprising a flat-panel type display unit |
| US5701134A (en) * | 1990-05-24 | 1997-12-23 | U.S. Philips Corporation | Picture display device with uniformity correction of electron supply |
| US5621271A (en) * | 1990-05-24 | 1997-04-15 | U.S. Philips Corporation | Display device of the flat-panel type comprising an electron transport duct and a segmented filament |
| US5903094A (en) * | 1990-05-24 | 1999-05-11 | U.S. Philips Corporation | Flat-panel type picture display device with electron propagation ducts |
| US5625253A (en) * | 1990-05-24 | 1997-04-29 | U.S. Philips Corporation | Flat-panel type picture display device |
| BE1007259A3 (en) * | 1993-07-01 | 1995-05-02 | Philips Electronics Nv | A display device comprising a display UNIT OF A FLAT PANEL TYPE. |
| US5986627A (en) * | 1990-05-24 | 1999-11-16 | U.S. Philips Corporation | Flat-panel type picture display device with electron propagation ducts |
| EP0550103B1 (en) * | 1992-01-03 | 1998-04-15 | Koninklijke Philips Electronics N.V. | Flat-panel type picture display device with electron transport ducts and a double selection structure |
| US5424605A (en) * | 1992-04-10 | 1995-06-13 | Silicon Video Corporation | Self supporting flat video display |
| US5477105A (en) * | 1992-04-10 | 1995-12-19 | Silicon Video Corporation | Structure of light-emitting device with raised black matrix for use in optical devices such as flat-panel cathode-ray tubes |
| US5532548A (en) * | 1992-04-10 | 1996-07-02 | Silicon Video Corporation | Field forming electrodes on high voltage spacers |
| US5742117A (en) * | 1992-04-10 | 1998-04-21 | Candescent Technologies Corporation | Metallized high voltage spacers |
| JPH0777949A (en) * | 1993-05-28 | 1995-03-20 | Philips Electron Nv | Image display device as well as selective drive circuit and integrated drive circuit used in image display device |
| WO1994028572A1 (en) * | 1993-06-02 | 1994-12-08 | Philips Electronics N.V. | Display device of the flat-panel type comprising an electron transport duct and a segmented filament |
| EP0654172A1 (en) * | 1993-06-08 | 1995-05-24 | Koninklijke Philips Electronics N.V. | Flat-panel type picture display device |
| EP0702844A1 (en) * | 1994-04-08 | 1996-03-27 | Koninklijke Philips Electronics N.V. | Display device |
| EP0727081A1 (en) * | 1994-09-07 | 1996-08-21 | Koninklijke Philips Electronics N.V. | Colour display device |
| KR100371041B1 (en) * | 1994-09-21 | 2003-04-11 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Display device having an envelope comprising a wire cathode |
| EP0734584B1 (en) * | 1994-10-31 | 1999-02-24 | Koninklijke Philips Electronics N.V. | Picture display device provided with an internal vacuum support and an exhaust connection |
| US5543683A (en) * | 1994-11-21 | 1996-08-06 | Silicon Video Corporation | Faceplate for field emission display including wall gripper structures |
| US5650690A (en) * | 1994-11-21 | 1997-07-22 | Candescent Technologies, Inc. | Backplate of field emission device with self aligned focus structure and spacer wall locators |
| US5578899A (en) * | 1994-11-21 | 1996-11-26 | Silicon Video Corporation | Field emission device with internal structure for aligning phosphor pixels with corresponding field emitters |
| WO1996026514A1 (en) * | 1995-02-23 | 1996-08-29 | Philips Electronics N.V. | Picture display device |
| WO1997017714A1 (en) * | 1995-11-08 | 1997-05-15 | Philips Electronics N.V. | Vaccuum tube provided with a line-shaped getter |
| US5859502A (en) * | 1996-07-17 | 1999-01-12 | Candescent Technologies Corporation | Spacer locator design for three-dimensional focusing structures in a flat panel display |
| US6049165A (en) * | 1996-07-17 | 2000-04-11 | Candescent Technologies Corporation | Structure and fabrication of flat panel display with specially arranged spacer |
| US6278066B1 (en) | 1996-12-20 | 2001-08-21 | Candescent Technologies Corporation | Self-standing spacer wall structures |
| US6414428B1 (en) | 1998-07-07 | 2002-07-02 | Candescent Technologies Corporation | Flat-panel display with intensity control to reduce light-centroid shifting |
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|---|---|---|---|---|
| US4069439A (en) * | 1977-02-02 | 1978-01-17 | Rca Corporation | Flat panel display with beam injection cleanup |
| JPS5887741A (en) * | 1981-11-09 | 1983-05-25 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Display tube |
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|---|---|---|---|---|
| US4719388A (en) * | 1985-08-13 | 1988-01-12 | Source Technology Corporation | Flat electron control device utilizing a uniform space-charge cloud of free electrons as a virtual cathode |
-
1990
- 1990-12-21 EP EP90203471A patent/EP0436997B1/en not_active Expired - Lifetime
- 1990-12-21 DE DE69026233T patent/DE69026233T2/en not_active Expired - Fee Related
- 1990-12-21 ES ES90203471T patent/ES2086365T3/en not_active Expired - Lifetime
-
1991
- 1991-01-07 CN CN91100134A patent/CN1082242C/en not_active Expired - Fee Related
- 1991-01-08 KR KR1019910000152A patent/KR910014989A/en active IP Right Grant
- 1991-01-09 JP JP3012772A patent/JP3068653B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4069439A (en) * | 1977-02-02 | 1978-01-17 | Rca Corporation | Flat panel display with beam injection cleanup |
| JPS5887741A (en) * | 1981-11-09 | 1983-05-25 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Display tube |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0436997B1 (en) | 1996-03-27 |
| JPH04212245A (en) | 1992-08-03 |
| JP3068653B2 (en) | 2000-07-24 |
| DE69026233T2 (en) | 1996-10-10 |
| ES2086365T3 (en) | 1996-07-01 |
| EP0436997A1 (en) | 1991-07-17 |
| DE69026233D1 (en) | 1996-05-02 |
| KR910014989A (en) | 1991-08-31 |
| CN1053320A (en) | 1991-07-24 |
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