CN1089040A - The display device of forming by preposition unit of grating and gas discharge back unit - Google Patents

Abstract

A kind ofly comprise the preposition unit of liquid crystal display grating comprises the gas discharge back unit of many gas-discharge tubes with light modulated conductance and plane formula display device.Rearmounted unit comprises and produces initial charged particle device so that get angry body discharge and control device of point independently discharges so that control each gas-discharge tube fast.Control circuit is simplified so that control a large amount of discharge pipelines with the minority control signal.Described back of the body irradiation source structure can produce and the synchronous light pulse of preposition unit scan operation.The combination of said two devices can produce coloured image via the sequential mixed-color method.Method can be made the color LCD board of small and exquisite and power saving without color filter thus.

Description

The display device of forming by preposition unit of grating and gas discharge back unit

The present invention relates to a kind of display device with the preposition unit of grating and gas discharge back unit, wherein the preposition unit of grating is used for the light modulated conductance, and the gas discharge back unit is used for providing monochrome or polychromatic light to preposition unit.

Along with popularizing of portable computer, the importance of plane formula display technique improves day by day, the first-elected LCD panel of plane display technique that today is the most successful.In the commercial color LCD board of today, generally all white light is filtered into three primary colours with color filter.In addition, in order to obtain correct colour mixture ratio, each pixel more need be divided into three sub-pixels, with the optical conductivity of modulation three primary colours.Under said method, most light that is produced by rearmounted unit all is lost in the color filter.In addition because the area on most panel all by signal wire winding and various in order to control sub-pixel device occupied, the valid window on the liquid crystal board also significantly reduces.The multiplied result of above-mentioned two factors makes the power consumption considerably of colour filter formula LCD panel.In general, high power consumption and expensive (the two all is because color filter and the high pixel density that causes thereof cause) are the most serious problems of present colour liquid crystal display device.

Patent application serial number PCT No.93901219.1(applying date before us is on Dec 18th, 1992) in, we propose a kind of structure that is called electronics fluorescence formula back light source, to produce the light pulse of three primary colours, being similar to us is about in hereinafter describing and illustrated kenel in Fig. 2, scan action when synchronous when these light pulses and LCD, and when these light pulse signals pass through liquid crystal display pixel, roughly finished transfer process by the pixel of optical pulse irradiation, then high quality image can be generated.Because electronics fluorescence formula back light source can produce high saturated red, green, blue primary colours, color filter can be removed.LCD only needs the optical conductivity of modulation three primary colours light pulse and produces required color mixture this moment.This measure makes light can pass through LCD without color filter.This method is not only to avoid the complexity of color filter and relevant sub-pixel and expensive, more is to have promoted simultaneously the light passband of liquid crystal display.

Above-mentioned electronics fluorescence formula back light source is a kind of cathode line light-emitting device.According to the principle of work of this device, in order to produce light efficiently, the voltage of anode usually need be added to more than 5000 volts.Based on the consideration of insulation and other fiduciary level, this anode voltage has caused many restrictions on device thickness and the B-power supply.Heal to become when the miniaturization when portable computer, the restriction on this plant bulk will become very big defective.And this anode voltage also often causes the safety problem of miniature portable system easily.Handle high voltages will require system designer to spend the cost of extra time and increase system.Based on above-mentioned various reasons, must be if might overcome the display device of above-mentioned all difficulties for enjoying popular confidence.

The invention provides a kind of display device and method of forming by preposition unit and rearmounted unit, but wherein preposition unit comprise a modularity light entire body and control device in order to the optical conductivity of modulating pel array on this light entire body with display image; Rearmounted unit comprises at least one sequence gas discharge tube arrays parallel with pel array or channel array.Here said gas-discharge tube is luminous according to gas discharge, and comprise the device that produces initial charged particle with at least before some described discharge tubes begin discharge in wherein producing initial charged particle.Rearmounted unit then further comprises a rearmounted control device, in order to its gas discharge of control after producing initial charged particle at described discharge tube.Rearmounted control device is also controlled the gas discharge of said discharge tube, so that selected discharge tube can be given out light in regular turn to supply the light source of preposition unit display image in the said discharge tube.

Usually, desirable rearmounted unit comprises many gas discharge pipelines and produces the method for initial charged particle so that put the body discharge of getting angry fast; This desirable rearmounted unit also need have control respectively to discharge method that pipeline discharges respectively.Under desirable embodiment of the present invention, grating adopts the material of liquid crystal display formula, and control circuit is then further simplified to allow with the drive signal of minority and controlled a large amount of discharge tubes.The back of the body irradiation source structure of this ideal can produce with preposition unit scan the synchronous light pulse ripple of action.According to sequential keyboard encoder colour mixture principle, the joint operation of this preposition and rearmounted unit can produce general coloured image, so we can just make the color plane display of small and exquisite and power saving without color filter in LCD.

The present invention is based on another kind may be in order to realize that back light unit is to replace the method and the device in electronics fluorescence formula back of the body irradiation source, especially under the demand of polychrome or complete color.Structure of the present invention is called " can scan fluorescence formula back light source ", utilize gas discharge principle to produce ultraviolet light the excitation band phosphorus substance with one of conversion ultraviolet light monochromatizing or three primary colours or polychromatic source.

Gas discharge has been used in the common light source of many kinds, as is used for the fluorescent tube and the used back of the body irradiation source of present LCD panel of office's intraoral illumination.These devices utilize the positive column (ion plasma) of electric discharge phenomena to produce light source.The optical efficiency that is produced by these devices can reach every watt 60 lumen or higher more than 8 times than electronics fluorescence back of the body irradiation source.Yet these devices are very slow and switch control is also quite complicated.For device can be operated as illustrated in fig. 2, the light pulse cycle of wherein carrying on the back the irradiation source, pulsewidth was about 1ms less than 5ms, then carried on the back the irradiation source and wanted to reach fast the body discharge of getting angry of reliable place.With traditional fluorescent light, it is very difficult wanting to reach this requirement.

In the operation that Fig. 2 described, each coloured image is divided into 3 son reflections corresponding to three primary colours again.

For each son reflection, the optical conductivity modulation signal is that every trade column scan in regular turn is to liquid crystal display pixel.After a certain pixel column was scanned back one section fixing delay, the light pulse of appropriate color was just generated to illuminate corresponding part on the LCD panel.The light pulse in back of the body irradiation source preferably can produce according to the pattern of a trivial scanning, and back light unit preferably can have the many parallel discharge tubes that can control respectively.

Another dot characteristics of this device operation is that discharge tube scans in regular turn, normally from one side of back light unit to another side.In view of this, but the one side of this scan-type back of the body irradiation source structure is a planar light pulse generating device, and it specifically comprises many parallel discharge tubes, wherein at least some for interconnective and can control respectively and produce light pulse in mode according to domain scanning.

Gas discharge is that electricity collapses the free process of formula, and wherein charged particle collides neutral particle, and via the ionization process, produces more charged particles.According to the physical characteristics of gas discharge, the formation of discharge (or point is sent out) need have the initial charged particle of some.These charged particles then can be quickened by the electric field of two sparking electrodes.In energy that these charged particles obtained surpasses arc chamber mixed gas free can the time, charged particle begins to make inelastic collision with the neutral gas atom.This kind collision can make the ionization atom and produce a positive ion and an electronics.This program is proceeded, and is all dissociated and gas formation plasma up to most gas molecule.

In conventional fluorescent, initial tape seed can produce (as hot-cathode fluorescent lamp) by the heated cathode of outside, or by radioactivity formula free (as cold-cathode fluorescence lamp).It is all still far away from requiring fast and reliably that above-mentioned dual mode, point are sent out program, often needs hundreds of milliseconds to the several seconds even longer.Though in hot-cathode fluorescent lamp, the problem that point is sent out can solve according to heated cathode often, the method can significantly reduce efficient and reduce lamp tube service life.In cold-cathode fluorescence lamp, because negative electrode is cold, the unique method of head it off is to use very high some generating to press.Clearly, have many bad spinoffs like this, and be intractable.In order to address these problems, one object of the present invention is to provide a kind of and scans fluorescence formula back of the body irradiation source, and provides some to produce the method for initial charged particle in the discharge tube of promoting the circulation of qi body discharge.This initial charged particle generating routine is to implement before a generating pressure imposes on sparking electrode.The initial charged particle that adds proper number, people can not need very high voltage to put to get angry the body discharge, and this program also repeats very reliably.

In an embodiment of the present invention, we introduce two kinds of methods that produce initial charged particle.One relates between contiguous discharge tube and transmits charged particle, and via the connection between contiguous arc chamber, the charged particle in arc chamber at present can diffuse to contiguous arc chamber.If before the charged particle recombination produced neutral particle, we had on the arc chamber of initial charged particle in these, in addition suitable point generating pressure then can reach fast and produce gas discharge reliably.The another kind of method that produces initial charged particle is shared certain a part of discharge tube between adjoining discharge process.Suitably arrange sparking electrode, adjacent discharge path can shared certain section discharge tube.Mistiming when between the discharge of two vicinities enough in short-term, its contain a large amount of charged particles in the shared discharge tube, so gas discharge can be sent out by point at an easy rate.

Another purpose of this invention is the simplification that reaches control circuit in the gas discharge backlight and liquid crystal display device, as shown in Figure 2, in order to reduce the interference of contiguous monochromatic reflection in polychrome or the complete color demonstration, preferably can have red/green/blue back of the body of q.s to shine unit.It will be very expensive controlling this a large amount of gas-discharge tube respectively as desire.As described below, the electrode in the discharge tube is divided into several groups couples together, use heterogeneous formula drive signal again to these groups, then control circuit can be simplified widely.

Should install gradually small and exquisite trend, the thickness of display board also need reduce.For obtaining carrying on the back suitable colour mixture between the three primary colours of irradiation source, people can mix these coloured light with diffusing panel.Because of casual colour table must leave light source one segment distance suitably to work, preferably can reduce the distance between discharge tube, colour mixture can be finished in low coverage.

In order to reduce the distance between discharge tube, must reduce the sectional area of discharge tube, yet this measure will increase the recombination fraction of charged particle at the fulgurite wall.In order to replenish the charged particle of these losses, can impose the higher voltage rate of driving and quicken the ionization program.Yet on some was used, this high voltage was unacceptable condition.So another object of the present invention is discharge tube is distinguished into the multistage discharge path and controls with many group drive electrodes.So, a discharge path is divided into the short path of multistage, can lowers driving voltage.In addition, the Yi Panjin law (is taken advantage of to knit apart from it between air pressure in the Pancken ' slaw), discharge tube and sparking electrode and should be kept a constant.Therefore a long discharge pipe being divided into several sections shorter air pressure in the permissible fulgurite of discharge tube increases.The increase of this air pressure not only can reduce the ion spray attached (because the speed of ion reduces) on the negative electrode, also can increase the density of charged particle in the plasma, and this can make the discharge intraductal electric current increase, and then increases the brightness of back of the body irradiation source light pulse.

Based on above-mentioned observation, the most important aspect of the present invention comprises following three's mixing: high-level efficiency back of the body irradiation source generating device-can scan fluorescence formula back of the body irradiation source, a kind of preposition optical conductivity modulator as liquid crystal display, and sequential keyboard encoder mixed-color method as shown in Figure 2.Above-mentioned three's combination can produce the flat-panel screens of high-level efficiency, can very small and exquisite form make with the manufacturing expense of economy.For example, a liquid crystal display that carefully manufactures and designs can have the optical conductivity of 30-35%, but and the efficient in good scan-type back of the body irradiation source can reach the 20-40 lumens/watt.It is that 7-10 lumens/watt and thickness are the display system of 5-6 millimeter that this two combination can produce efficient.This is respectively with these two kinds of boundaries that technology definitely is beyond one's reach.Use liquid crystal display, as discussed, the efficient of system, price and manufacturability are greatly affected because of needs color filter and sub-pixel.The efficient of at present commercial best Color Liquid Crystal Display is about 0.8 lumens/watt (low 10 times approximately) and the thickness of display board is 10-12 millimeter (thick one times).On gas discharge, the flat panel display that plasma display panel has been adopted to possibility has and surpasses the history in 15 years.Yet, can be for causing according to the flat-panel monitor of two-dimensional array formula control, the basic unit of discharging of plasma display panel must make very little.This restriction makes plasma display panel (negtive glow region) operation in the gas discharge negative glow region that there is not very much efficient.The efficient of general plasm display device is about the 0.2-0.7 lumens/watt, or can scan fluorescence formula back of the body irradiation source than the present invention, and the low 10-20 of the commingled system efficient of liquid crystal display and the operation of sequential keyboard encoder colour mixture doubly.

Following structure accompanying drawing and preferred embodiment of the present invention, the present invention is described in detail.In the drawings:

Figure 1A is a calcspar of video display system in order to explanation the present invention, comprises the preposition unit of a liquid crystal display, a rearmounted unit, and in order to control the control device of aforementioned Unit two.

Figure 1B is for showing the sketch of observer and preposition, rearmounted unit relation.

Fig. 2 is in order to show the sequential chart of preposition and rearmounted unit operations among Figure 1A, the 1B.

Fig. 3 A is a view on first embodiment of back light unit among Figure 1A, the 1B.

Fig. 3 B is the side view of the back light unit of Fig. 3 A according to the 3B-3B tangent line.

Fig. 3 C is the side view of the back light unit of Fig. 3 A according to the 3C-3C tangent line.

Fig. 4 A is Figure 1A, view on second of back light unit embodiment among the 1B.

Fig. 4 B is the sequential chart in order to the back light unit operation of exploded view 4A.

Fig. 5 A is Figure 1A, view on the 3rd of back light unit the embodiment among the 1B.

Fig. 5 B is the sequential chart in order to the back light unit operation of exploded view 5A.

Fig. 6 A is Figure 1B, view on the 4th of back light unit the embodiment among the 1B.

Fig. 6 B is the sequential chart in order to the back of the body irradiation source operation of exploded view 6A.

Fig. 7 is the cut-open view in order to the 5th embodiment of back light unit that shows Figure 1A, 1B.

Fig. 8 A is in order to view on the 6th embodiment of back light unit that shows Figure 1A, 1B.

Fig. 8 B is the side view according to tangent line 8B-8B in the back of the body irradiation source of Fig. 8 A.

With reference to figure 1 and 2, display system described in the invention comprises a display controller 104, in order to the integrated operation of control display; One line driver 106 is in order to the LCD of lining by line scan; One row driver 102 is in order to transmit the pixel in the extremely present institute of the optical conductivity modulation signal scan line; One video memory 114 is in order to the view data of storage three primary colours reflection; One back-illuminated type unit 32 comprises the N(positive integer) the individual light source unit that can control respectively; The preposition unit 34 of one liquid crystal display; One back of the body irradiation source scanning monitor 110 is in order to provide the necessary drive signal in may command back of the body irradiation source 32; And one back of the body irradiation source drive device 108, in order to necessary voltage of gas discharge and light pulse and Current Control to be provided.These control modules also capable of being combined one preposition control module 100-comprises 104,114,102,106, and a rearmounted control module 101-comprises 108,110.

When normal running, view data reaches display control module 114.This image then is divided into three primary colours reflection and is stored in the video image storer 114.104 of display controllers are by line sense data in the video memory 114, and in order to send into liquid crystal display to driver 102.After the data of sliver were sent into driver 102, line driver 106 started the optical conductivity of suitable capable signal with each pixel in the control next line.For each primary colours reflection, above-mentioned scanning motion repeats all row of inswept LCD Panel according to an every trade.

The cycle of each panchromatic reflection preferably can be less than 16.67 milliseconds.Because of each money look reflection is to be made of 3 monochromatic son reflections, the cycle of each son reflection preferably can be less than 5.5 milliseconds.As shown in Figure 2, the scan period t1 of each son reflection on the LCD, t2, t3 preferably can be less than or equal to 5.5 milliseconds, and so whole cycles just can be less than or equal to 16.67 milliseconds.

Before showing among Figure 1A, puts Figure 1B the pel array in the unit 34 and the space relativeness of discharge tube in the rearmounted unit 32 or passage.Shown in Figure 1B, preposition unit contains column electrode 152 and row electrode 151.For an observer 160, if looked by observation direction 162, column electrode and row electrode are overlapped at the light modulating materials (not shown) of one deck between column electrode and row electrode, and definition trip and row pixel; These pixels coexist with column electrode and row electrode overlapping region substantially.

Utilize column electrode and row electrode that suitable voltage is added on this layer light modulating materials, can modulate intersecting of column electrode and row electrode, or the transmittance of pixel.

Discharge tube in the unit 32 is parallel with pixel column 152 basically, and wherein discharge tube composition N organizes independently light source unit.Look by 162 directions, each discharge tube to I haven't seen you for ages with unit 34 in one of pixel column overlapping, so the light of each discharge tube generations can be supplied corresponding trip picture with it be.Per unit in the N group light source unit all can produce one or organize red, green or blue (or white) light pulse more, with the extremely preposition unit of supply light 34 with display image.Though in diagram, discharge tube in the unit 32 and light source unit all are parallel to the row 152 in the preposition unit, very obvious is that they also can be parallel to row 151 or other linear pixel array; This variation of all classes is in the scope that the present invention comprises.

With reference to figure 2, t1, t2, t3 be 3 sweep time section.In each time section, scan control signal can be delivered on each column electrode 152 in regular turn one by one through driver 106.Concerning each light source unit, and three time sections (as t1, t2, t3) necessary to preposition unit for all three kinds of primary colours of supply.In Fig. 2, scanning impulse 211,221,231,241 for being supplied to 4 pulses that in the preposition unit there are the column electrode confession in period t1.Similarly, pulse 212,222,232,242 is 4 representative pulses in t2 interscan pixel 152.

Putting up the best performance of the sequential that the light pulse ripple produces synchronous so that display device with the sweep signal of the preposition unit of liquid crystal display.If people will divide into the N sub regions (in Fig. 2 on the preposition liquid crystal display logic, N=4), wherein each subregion is corresponding to the light source unit in a back of the body irradiation source, comprises one or the multirow pixel, and then the scanning sequence of pixel column and back of the body irradiation source produce sequential preferably can as shown in Figure 2 relation.For simplicity, in the example shown in Figure 2, in back of the body irradiation source or the rearmounted unit 32 4 sub regions are only arranged.Pulsating wave 211(G), 212(B), and 213(R) representative control shows the first subregion medium green, indigo plant, red line scan signals.Similarly, pulsating wave 221,222, and the sweep signal of the image three-colo(u)r of 223 representative control demonstration second subregions, the rest may be inferred by analogy for it.Light pulse that it should be noted that each different color produces when all the scan period of this look finishes in this subregion.Pulse 221 is to show green image at this point in order to the optical conductivity of first pixel of subregion 2 in the modulating unit 34.But to just generate every one section long time in order to the back of the body irradiation pulse 249 that shows this pixel.In general, arrow 250 shows preposition scanning impulse and the interpulse sequential relationship of back of the body irradiation.Wherein carry on the back when optical conductivity that irradiation pulse 249 will wait until preposition pixel column is stablized and just produce.

Comprehensive, utilize above-mentioned method to postpone the time of light pulse with respect to line scan signals, can make each liquid crystal display pixel have the longest time to reach stable state at light pulse ripple pre-irradiation.This mode of operation can be reduced to minimum with the possible loss of pixel light conductance.Actual, for reducing crosstalking between contiguous monochromatic son reflection and territory, adjacent subarea, the number of subregion is big more a lot of than 4 possibly.Another reason of being inclined to use a large amount of subregions is the distance that reduces between each monochromatic source, and concerning the fixed mask size, the number of subregion increases with the minimizing of distance between light source unit.Distance is required for diffusing panel can also be worked under small and exquisite system's packing effectively between minimizing light source unit.Usually be added between LCD panel and the back of the body irradiation source, as the diffusing panel among Figure 1B 154 to produce milder light source.

With reference to figure 3A-3C, 6A, 6B wherein shows one of back of the body irradiation source unit 32 embodiment.This embodiment comprises two dull and stereotyped 301 and 302.Fig. 3 A is a skeleton view on this element.Fig. 3 B is the sectional view according to tangent line 3B-3B among Fig. 3 A.Fig. 3 C is according to the sectional view of tangent line 3C-3C among Fig. 3 A.

Dull and stereotyped 301 place between flat board 302 and the LCD panel, and 301 pairs of visible lights are transparent basically.301 can further comprise layer of surface coating 303 on the surface in the face of dull and stereotyped 302.Ideally, coating 303 should be able to uv reflectance so that the ultraviolet ray that gas discharge produced can be reflected back toward discharge tube and the fluorescence excitation material.Coating 303 also can be ultraviolet-absorbing, to absorb the ultraviolet ray of discharge generation, avoids it to escape from arc chamber and influences the operation of liquid crystal board.Dull and stereotyped 302 can be made by the photetching formed glass that the light of casting formula glass/ceramic or similar Corning is moulded glass (Fotoform glass).Though in Fig. 3 C, dull and stereotyped 302 inner edge contains many sharp keen protuberances, form rectangular tube or passage, yet other various pipes or channel shape is trapezoidal as polygon, and curved surface etc. is possible selection, and the scope that is comprised by the present invention.

Shown in Fig. 3 B, the sharp protuberance in dull and stereotyped 302 peaks shown in Fig. 3 C can be in order to separate the discharge pipeline in this device when dull and stereotyped 301 are placed on 302.Contain many holes 310 in these discharge pipelines, in order to connect contiguous pipeline.Comprise two parts 312 and 313 in each pipeline.313 is the main region of discharge in the pipeline, is the main source of light; 313 is the main and long discharge path of 321 on negative electrode 322 and anode.312 function helps the scan operation that makes main discharge pipe 313 for 313 required initial charged particles are provided via hole 311.For these reasons, 312 can be used as leading and point is sent out the gas discharge of main discharge pipeline, can be called as leading part.The scanning of leading part 312 then will be by means of hole 310.These holes make charged particle diffuse to adjacent part by the part 312 of present discharge, produce initial charged particle with appropriateness in adjacent part 312, so that prepare for ensuing discharge.Attention is at main discharge partly in 313, only has the pipeline that links to each other with the leading part 312 that charged particle is arranged and impose enough sparking voltages can produce gas discharge.312 and 313 only have a duck eye to connect, and it is to be attached to negative electrode to reduce ion by the spray of main discharge pipe in order to isolate this two arc chamber, in order to avoid pollute the main discharge pipe.

Electrode 321 to 325 can be by applying at dull and stereotyped 301 upper films or the thick film screen printing generation.Ideally, electrode 321 is a negative electrode for anode electrode 322.The condition of negative electrode is extremely important under the cold-cathode discharge operation.The method for making of this electrode can be prior to the aluminum steel of heavy attached one deck appropriateness thickness on the flat board 301.On aluminum steel, can sink attached one deck magnesium oxide again.This mixed structure can further toast under the condition of oxidation.The result can produce the surface that one deck is made up of magnesium oxide and magnesium, has low surface work function.Electrode 325 is the discharge anode of assistant discharge unit 312.This anode can produce gas discharges with supply main discharge 313 required initial charged particles partly with electrode 322.Electrode 324 is anodes of initial charged particle supply first 315.This initial charged particle supply unit all remains on logical state always, and can constantly supply initial charged particle and give leading part 312.

Wall is coated with fluorescent material 304 within the main discharge pipeline 313.This fluorescence coat 304 can convert the ultraviolet light of gas discharge generation to red, green or blue three look visible lights.Ideally, coating 305 should have very high visible light reflection coefficient.The light that can help like this to produce maps to LCD panel.Ideally, coating 305 preferably also can light reflection ultraviolet to fluorescent material to increase efficient and brightness.Another kind of possibility, coating 305 can absorb ultraviolet light and can not be excited mistakenly with the fluorescent material that prevents contiguous discharge pipeline.Moreover coating 305 also can be made of the ultraviolet light reflecting material of internal layer and the UV Absorption thing of skin.Coating 306 is not certain necessity, and it gets back to preposition unit in order to the light of promoting reflection mapping, and can be used as common ground, with the insulating electron interference and prevent that the user from suffering electric switch.Coating 306 can be made with aluminium or other similar substance.

The major function of leading part 312 is to help the scanning of this device and the initial charged particle of supplying main discharge tube 313.Ideally, wall need not apply fluorescent material within the leading part 312, partly 313 light pulse generation of the just unlikely interference main discharge of its scanning like this.The details crosscut composition diagram of front pilot 312 and the part 313 of the main discharge shown in Fig. 3 C are closely similar, and unique not being both do not have fluorescent paint 304 in 312.

When this device of combination, dull and stereotyped 301 and 302 must carefully earlier handle and aim at, and then this two dull and stereotyped useable glass potpourri is shut.This device can then toast in stove and be evacuated, and adds suitable gaseous mixture again, as neon+0.2～0.8 radon.

Fig. 4 A, 4B show the electrical connection of this embodiment and drive sequential chart.With geometric configuration, cathode substance, gas ingredients, and the differences such as surface appearance of discharge pipeline, discharge causes voltage and can change about 200～300V.Negative electrode 322 is connected to-150～-fixed voltage of 250V.The drive waveforms of other electrode is shown in Fig. 4 B.Leading sparking electrode 325 is divided into three groups, so and by the autonomous scan pattern driving of three-phase.Ultimate principle from main sweep is contiguous the transmission.Borrow the hole 310 of 312 of contiguous leading arc chambers, charged particle can diffuse to contiguous arc chamber 312.

If in a certain particular moment, a certain leading arc chamber 312 is discharging and is being full of charged particle, back phase neighbours arc chamber 312 also moderately has some discharge particle before this arc chamber.Be connected down three, cause one of them that voltage only imposes on two adjacent arc chambers.Discharge curring time through a short-term, gas discharge will reach next leading arc chamber by last leading arc chamber, produce enough initial charged particles and can further cause the main discharge pipe that connects at it, and the main discharge pipe there is enough voltage, then produces electric discharge phenomena.In theory, in the device of suitably design, this three-phase drive device can be controlled the discharge pipeline of any number basically, so can significantly reduce the price of this device.

Led arc chamber 312 before gas discharge is sent to suitably after, the voltage of anode 321 promptly rises to a generating and presses.Though electrode 321 is shared by 313 all in main discharge pipelines, the main discharge pipeline 313 that is connected to the auxiliary discharge chamber of discharging at present will have than other pipeline 313 that mainly discharges and be the initial current of height.Because of the rate of growth of discharge current is directly proportional with initial current, this pipeline 313 that mainly discharges will reach complete discharge condition earlier than other pipeline 313.After a certain discharge pipeline was sent out by point fully, an available electric current suppressed the voltage that dress system CLD reduces anode 321, and the electric current restraining device is generally resistance or electric capacity, can be sent out by point in order to prevent other discharge pipeline after sending out at 313 in a main discharge pipeline again.CLD can guarantee only to have a main discharge pipeline 313 suitably to be chosen and put to send out.

Just the same on electrode 323 and 325 entities, its function is providing a special initial START signal to control the initial charged particle generating routine of 312 of initial charged particle supply unit 315 and leading arc chambers.

Shown in Fig. 4 B, as send a high pressure to electrode 323, discharge pipeline 314 will be put and send out by means of the first charged particle of being supplied of initial charged particle supply.In next period, utilize suitable three-phase control signal, electric discharge phenomena can be sent to pipeline 312.

Shown in Fig. 4 B, desire is started rearmounted unit 32, can add a positive starting voltage 352 in the initial electrode (START) 323 of Fig. 4 A when time t11.This measure will produce gas discharge to produce initial charged particle in arc chamber 314.These charged particles pass hole 310 to adjacent leading arc chamber 312.To time t12, φ 1 is drawn high in the near future, and leading discharge sky begins discharge, and the charged particle that is produced promptly reaches coupled main discharge pipe 313, and also makes this main discharge pipe 313 begin discharge and generation ruddiness R1.At ensuing time t13 and t14, following two leading arc chambers 312 can be accepted initial charged particle in regular turn and produce leading discharge, but light does not generate, because shown in Fig. 4 B, does not have enough voltage to impose on the anode of the main discharge pipe of its correspondence.

Shown in the three-phase waveform of Fig. 4 B, when time t15, have enough anode voltages to impose on and count the 4th the main discharge pipeline that leading arc chamber linked to each other by arc chamber 314, so this main discharge pipeline will produce discharge and produce light pulse R2.Next can be by that analogy.After all pilot units 312 all produced discharge, another enabling pulse 354 must be threaded onto initial electrode (START) to repeat said procedure.

Shown in Fig. 4 A, hole 310 preferably can be staggered front to back and be arranged in Z-shapedly, and its connection is then vertical with the discharge tube direction.The binding of these holes also can form other shape, and its basic line direction and discharge tube are non-parallel; The variation of these differences is all in the present invention's scope.

Fig. 5 A, 5B shows the electrode connection method based on difference under the arc chamber structure of Fig. 3 A.Under this structure, the connection of anode 321 is divided into two groups, and wherein every group all has its electric current restraining device CLD separately.START(is initial) waveform also make an amendment slightly so that two leading arc chambers 312 can discharge simultaneously.If we are divided into two ones and 2 electric current restraining devices are provided with anode, then can there be simultaneously two main discharge pipelines 313 to be sent out by point.This measure can make the light output of this device double under the condition of a little cost increase.It should be noted that positive contact is divided into many groups, and under heterogeneous drives structure, do a little and change, more than the example showed can be extended to the device that multi-discharge tube is sent out with time point.It is included that the obvious expansion of this kind is shown the present invention.

Fig. 6 A, another kind of electrode connection under the arc chamber structure of 6B exploded view 3A.Under this variation, anode is replaced by a pair of parallel pole 321A and the 321B that is positioned at main discharge pipe central authorities, and the band negative electrode is then replaced by the electrode 322A and the 322B that are positioned at the discharge tube two ends.Under this structure drive signal waveform except voltage swing with Fig. 4 B shown in identical.Such as previously discussed, the advantage of this arrangement is to need to allow that discharge path shortens under the giving an example of increasing voltage because of the surface charge reorganization.Because two discharge paths are arranged, two groups of anodes and two cover electric current restraining devices need be arranged on this device.This kind structure also can form more shorter discharge path via increasing electrode in a discharge tube.Yet, structure shown in Figure 6 since its anode in the centre influence to quality of colour less, be better than other multipath structure.And inevitable some negative electrode of the structure that surpasses two paths can be in the middle of the discharge pipeline, and these negative electrodes can produce many visible lights in the negative glow region and influence the purity of color.

Fig. 7 shows the embodiment of another back light unit 32.This embodiment comprises a panel 555 and forming board 560.Dull and stereotyped 555 is to be made by the transparency material as glass.Comprise many parallel grooves 565 in the forming board 560.When dull and stereotyped 555 were positioned on the forming board 560, these grooves formed the discharge pipeline.But dull and stereotyped 560 glass, pottery or mould glass photetching glass such as (Fotoform glass) as the light of Corning.The groove inwall scribbles fluorescent material and other suitable reflection or absorbing material.It is parabolic that the square section of groove is essentially, and so the light by luminous paint production all forwards shines upon basically effectively.Wall has a sequence hole 580 within the forming board 560.These holes can flow charged particle in order to connect the discharge pipeline that is formed by groove 565 to help between contiguous discharge tube.These charged particles can be used as the initial charged particle of discharge process and each discharge pipeline are sent out by point soon.

Electrode 575 and 570 is by making as materials such as nickel and aluminium.Down desirable, the tubulose that is shaped as hollow of these electrodes, and face is used as negative electrode within the pipe.This tube electrode can help to increase the active cathodic area and reduce the fluorescence coating material by the pollution of cathodic sputtering.This discharge pipeline discharge be by apply suitable voltage to electrode 575 and 570 and the point.Led arc chamber and similar control electrode before adding as Fig. 3 on this basic structure, this device can be worked according to autonomous mutually scanning control mechanism more than shown in Fig. 4-6.

Back of the body irradiation source described in the invention also can be used for producing that white light gives tradition that the color filter LCD panel arranged.Utilize the advantage of this light source, shown in the control gear of Fig. 4-6, it is controllable working the discharge tube number of sending out simultaneously.Further, be plane formula and directly place under the LCDs that because of light-emitting component the thickness of this display device can reduce widely.At last, need not use as light pipe because of this device, optically coupled devices such as CD can will increase greatly by the back of the body irradiation impulse ratio of LCD Panel.

Fig. 8 shows that the another kind of possible back of the body is according to first 32 embodiment.This embodiment uses the glass tube 425 of difference as the discharge pipeline.These glass tubes at one end seal with connector assembly 415, and are connected to a common passage 440 in the other end.Wall is coated with fluorescent material 405 within 425, can change ultraviolet light by the gas discharge generation and become one or the visible light of polychrome.At the opposite side of glass tube 425, reflection paint 427 can be in order on the light reflected back LCDs that will carry on the back mapping.Coating 427 can be by making as materials such as aluminium.Sparking electrode 420 and 410 is placed in the sealed end of glass tube 425.Electrode 420 can be made by the nickel pipe.The function of electrode 430 then is as leading reseting (RESET) electrode.

Gas discharge is to give birth to by adding initiation voltage to two 430 electrode.This discharge then forms the path 433 of a U-shaped, occupies two and comprises electrode 420 discharge tubes 425 and connect the common pipeline 440 of one of this two pipe section.Ideally, the discharge path of twice vicinity must have in the U-shaped pipe one section.Via so discharge tube is shared, the point of discharge is sent out and is very easy to, because there is a large amount of initial charged particles in the pipe.After this installs lastrow and is scanned up to next line, degree of discharge can be by the discharge generation charged particle of electrode in last column and 430 electrodes in common road 440, will scan via the discharge of electrode 420 in electrode 430 and the lastrow and be changed to initial state again.Compare with Fig. 3-7 variety of way of being introduced, the charged particle that produces in discharge tube when each discharge also can be utilized by the discharge path of shared discharge pipeline when one scan down, thus do not need as described above method respectively, charged particle generation and diffusion process.

Though this embodiment is showed with glass tube that in Fig. 8 basic structure also can be changed into molding plate and the panel construction mode of utilizing similar Fig. 7 and form.This obvious variation of class is the scope for the present invention includes also.

Claims (40)

1, a kind of display equipment, its composition comprises:

(a) preposition unit comprises:

An object has the zone that multirow can be modulated light, and define one can printing opacity the pixel array;

This preposition unit also comprises a preposition control device, is used for controlling the penetrating light intensity of pixel, with display image;

(b) rearmounted unit comprises:

One is held tool, has one group of gas discharge channel at least, and these gas discharge channels are parallel with the pixel array substantially, and the gas discharge that takes place in described passage can cause passage luminous;

A kind of method that produces initial charged particle, this method can before gas discharge takes place, produce initial charged particle in some passage at least;

A rearmounted control device, in order to control each more described passage, the generation of first charged particle can be arranged, then produce gas discharge, described rearmounted control device can pilot-gas the order of discharge, make that selected gas discharge channel can be luminous according to sequential, to provide light to preposition unit, display image.

2, device as claimed in claim 1, the initial charged particle device of described generation is one or more paths in described appearance tool, these paths are connected with described gas discharge channel, make the charged particle that gas discharge produced in one or more passages, can help easily to produce follow-up gas discharge at other one or more discharge channels.

3, as the device in the claim 2, each passage has first end and second end, and described path connects first end of some passage, allows charged particle to propagate in different passages by described path.

4, as the device in the claim 3, described rearmounted unit further comprises the sparking electrode that is or approaches second end.

5, as the device in the claim 3, described initial charged particle generation device further comprises a leading sparking electrode that is positioned at described path, to reach the initial discharge of one or more scan periods.

6, device as claimed in claim 3, described rearmounted control device cause a pair of two passages to produce gas discharge simultaneously; And have at least a part of path to connect two passages of discharge simultaneously.This postposition control device can cause different right passages, several periods in that majority links to each other, and successively produce gas discharge, and two pairs of passages of gas discharge took place before and after at least two continuous periods, have at least a passage overlapping; The charged particle that produces in previous discharge channel can help the generation of discharging in another passage a little later.

7, device as claimed in claim 2, described appearance tool has the passage partition wall, to divide two adjacent passages; Described initial charged particle generation device comprises one group of path, and each path connects two adjacent passages, propagates at two adjacent interchannels to allow charged particle.

8, device as claimed in claim 7, described one group of path is aligned on the line substantially, this line traverses described this group passage, allow charged particle by this group path sequential ground by a channels spread to next passage, discharge with the angry body of sequential real estate in passage.

9, as the device in the claim 8, described passage has terminal; Described path be positioned at channel end or near.

10, as the device in the claim 8, described path becomes a jaggies to arrange substantially, and this jaggies is substantially perpendicular to discharge channel.

11, as the device of claim 8, its rearmounted unit further is included in the sparking electrode in each passage, from the utmost point with the gas discharge in the control channel.

12, as the device of claim 11, described initial charged particle production method further comprises one or more leading sparking electrodes, described leading sparking electrode is positioned near one or more paths of interface channel and passage, in order to control leading gas discharge, produce charged particle, to facilitate by the gas discharge in the passage of sparking electrode control.

13,, have at least the electrode of a passage can be simultaneously as sparking electrode and leading sparking electrode, to reduce the electrode number in this passage as the device of claim 12.

14, as the device of claim 12, put control device after wherein said and/or initial charged particle generation device applies the leading sparking electrode of a control signal in each passage, produce gas discharge in the passage and cause, described control signal is that the passage in sequential ground connects a passage ground and is added to leading sparking electrode, thereby cause in whole group passage, between leading sparking electrode, produce to the gas discharge sequential.

15, as the device of claim 14, described rearmounted control module applies on the sparking electrode of a voltage in selected passage, causes at leading sparking electrode and produces gas discharge with after charged particle is provided, and the major part of gas discharge in passage takes place.

16, as the device of claim 14, one group of leading sparking electrode wherein is to be connected to become the number district aspect electric, and described rearmounted control device and/or initial charged particle production method apply control signal with heterogeneous self-scanning pattern.

17, device as claimed in claim 1, described object is one deck light modulating materials, described preposition control device comprises one group of column electrode and the one-level row electrode perpendicular to column electrode, when seeing over from desired direction of observation, described column electrode and described row electrode are overlapping on described one deck light modulating materials, and on described one deck light modulating materials, define continuous capable pixel, thereby controlled by the electric signal that is added on column electrode and the row electrode through the penetrability of pixel.

18, as the device of claim 17, described preposition control device apply two or more the electric signal of multisequencing on column electrode and row electrode, cause via the printing opacity of pixel can with each delegation continuously change and define a kind of scanning sequence, this scanning sequence is the scan line pixel successively, have only one-row pixels to be scanned each time, each sequence is with respect to one of several colors, and wherein the electric signal of each sequence is used to control the penetrability of each row pixel for corresponding color light.

19, as the device of claim 18, described one group of gas discharge channel is parallel with column electrode substantially, when looking by observation direction, each passage and one-row pixels is overlapping at least in preposition unit, when gas discharge takes place in described passage, the light of one of described several colors of this passage emission;

Described rearmounted control device is controlled the gas discharge of each passage, thereby in each sequence, applies the electric signal with respect to this color of light earlier, to change at least one-row pixels for the penetrability of this color of light; After a delay that is predetermined, just launch the light of relative color by gas discharge with respect to the passage of this row pixel.

20, device as claimed in claim 1, wherein each of several passages all comprises a major part and a leading part at least; Scribble the light luminescent material in major part, and do not have the light luminescent material, thereby reduce the light that sends at leading part at leading part.

21, use cold cathode in the device as claimed in claim 1, the passage of rearmounted unit wherein to cause the gas discharge in the passage.

22, device as claimed in claim 1, rearmounted unit wherein further has light reflector, throws to the direction of preposition unit with the light that will be sent.

23, device as claimed in claim 1, the method that wherein produces initial charged particle comprises the cell of a continuous discharge, so as to producing charged particle continuously.

24, device as claimed in claim 1, the described appearance tool in the described rearmounted unit comprises the spacer of an array, this spacer is arranged to be used for separate wantonly two adjacent passages, and the gas discharge of this adjacency channel is isolated mutually.

25, as the device of claim 24, described spacer is that the pipe by an array is constituted, discharge channel of each pipe definition.

26, as the device of claim 24, described appearance tool is made of a panel and a backboard, and backboard is attached to panel and defines discharge channel by some crossbeams towards panel, and crossbeam herein is described spacer.

27,, has coating on the backboard of described appearance tool, with reflect visible light and ultraviolet light as the device of claim 26.

28, as the device of claim 26, described appearance tool further has one deck between panel or backboard, and this layer can light reflection ultraviolet, and allows visible light pass.

29,, put the unit after described and further be included in sparking electrode on the panel as the device of claim 26.

30, device as claimed in claim 1, further there is the sparking electrode more than two or two described rearmounted unit in each passage, each passage has two ends, wherein has a sparking electrode at least between two ends, and each passage is divided into short passage, and obtain short gas discharge approach.

31, as the device of claim 30, each described passage has two ends, and further there are four sparking electrodes described rearmounted unit in each passage, and wherein two discharge negative electrodes are positioned near two ends or two ends, and two discharge anodes are between two ends of passage.

32, a kind of display packing, this method is used a device, and this device is made up of a preposition unit and a rearmounted unit; Preposition unit comprises an object with array region, and this array region can be modulated penetrability, and the definition pixelated array is to allow light transmit; There is at least one group of parallel with pixelated array substantially gas discharge channel rearmounted unit, and gas discharge takes place in described passage, thereby emission light; Described display packing comprises:

Modulation passed the light intensity of pixel, with display image;

Before the major part generation gas discharge of at least some passages, in passage, produce charged particle, and cause the interior gas discharge of passage major part; Therefore when producing charged particle in passage, thereby gas discharge taking place, cause the passage selected from described at least some passages can be one by one successively, or a plurality ofly connect luminously a plurality ofly, provide light to preposition unit, reaches the image demonstration.

33, as the method for claim 32, described object is the material of one deck modulate light intensity, described preposition unit comprises one group of column electrode and one group of row electrode vertical with column electrode, when seeing by observation direction, column electrode and row electrode are overlapping on described light modulating materials, and define continuous capable pixel on optical modulation layer;

Described modulation step applies electrical signal sequence more than two or two on column electrode and row electrode, the penetrability of the capable pixel of each sequence delegation ground sequence change, and defining a kind of scanning sequence, this scanning is line scanning have one-row pixels to be scanned at every turn; First sequence corresponds to a kind of in several colors, and wherein the electric signal of each sequence is in order to control the penetrability of capable pixel for corresponding color.

34, as the method for claim 33, wherein have at least one group of gas discharge channel to be parallel to column electrode substantially, when seeing by direction of observation, each passage is contained the corresponding pixel that delegation is positioned at preposition unit at least, when gas discharge took place in described passage, described passage just sent the light of one of several colors;

Each sequence in described method, electric signal apply earlier to change the penetrability of capable pixel for corresponding color; Through the delay be scheduled to after, just described at least some passages in produce charged particle, and then cause gas discharge, make passage send the light of corresponding color thereafter.

35, as the method for claim 32, the described charged particle step that produces continuously at least some passages is to produce charged particle at more described passages earlier, before the major part generation gas discharge of adjacent channel, in this adjacent channel, produce charged particle then.

36, as the method for claim 35, the described gas discharge step that causes comprises that elder generation causes leading discharge at the leading part of a passage, then at least some passages, passage connects a passage or a plurality of passage and connects a plurality of passages ground and produce leading gas discharge continuously.

37, as the method for claim 35, described generation charged particle and cause the gas discharge step to cause major part to produce gas discharge at some passages of selecting, wherein, gas discharge in the passage major part, be to occur in leading gas discharge to produce after the charged particle, but before these charged particles dissipate.

38, as the method for claim 32, described generation charged particle and cause the gas discharge step to cause in a plurality of continuous periods, gas discharge are successively in right the taking place in the road of difference; Described generation charged particle is at least two periods that link to each other with causing the gas discharge step, gas discharge takes place respectively in these two periods in two pairs of passages, and these two pairs of passages have at least a passage overlapping, and the charged particle that produces in the therefore previous period can be facilitated the generation of gas discharge in the later period.

39, a kind of display device comprises:

A preposition unit has one group of column electrode and one group of row electrode perpendicular to column electrode, look by observation direction, it is overlapping on one deck light modulating materials that this column electrode is subjected to electrode, and defining continuous capable pixel at this layer, the light intensity that sees through pixel is to be controlled by the electric signal that is added on column electrode and the row electrode;

A preposition control device, can apply electrical signal sequence more than two or two on column electrode and row electrode, mode with a delegation, sequential ground changes the penetrability of pixel, and defines a kind of scanning sequence, this scanning sequence sequential ground scan line pixel, each scanning one-row pixels, each sequence is a kind of corresponding to multiple color, and in each sequence, electric signal is in order to control the printing opacity place of capable pixel for corresponding color;

There is at least one group of parallel with column electrode substantially gas discharge channel a rearmounted unit; When being looked by observation direction, each passage is contained the pixel that delegation at least is positioned at preposition unit; When gas discharge when described passage takes place, this passage just sends the light of one of several colors;

Produce the device of initial charged particle in rearmounted unit,, in this passage, produce charged particle in order to before at least some passage generation gas discharges;

A rearmounted control device in order to the generation of gas discharge in the control channel, causes to produce charged particle in described at least some passages earlier, thereby cause gas discharge in passage; Described rearmounted control device control channel discharge, make when control signal that described preposition control device applies a sequence to change after delegation corresponds to the penetrability of pixel for corresponding color of described at least one passage at least, after a delay of being scheduled to, in described passage gas discharge takes place, the light of corresponding color takes place then.

40, a kind of display packing is used a kind of device, and described device comprises:

A preposition unit has one group of column electrode and one group of row electrode perpendicular to column electrode, is looked by observation direction, and this column electrode and row electrode are overlapping on one deck light modulating materials, and define continuous capable pixel at this layer.The light intensity that sees through pixel is by the electric signal control that is added on column electrode and the row electrode;

Rearmounted unit have at least one group substantially with the column electrode gas discharge channel of every trade mutually; When being looked by observation direction, each passage is contained the pixel that delegation at least is positioned at preposition unit, when gas discharge when described passage takes place, this passage just sends the light of one of several colors;

Described method comprises:

Apply electrical signal sequence more than two or two on one of column electrode and row electrode; The penetrability of the capable pixel of each sequence delegation ground sequence change, and define a kind of scanning sequence.This scanning has one-row pixels to be scanned for line scanning at every turn; Each sequence corresponds to a kind of in several colors, and wherein the electric signal of each sequence is in order to control the penetrability of capable pixel for corresponding color;

In at least some passages, produce charged particle, and cause the gas discharge of described passage, the described step that causes also can cause electric signal in each sequence to be applied at least one-row pixels with after changing the penetrability of each pixel for corresponding color, through a predetermined delay, described passage just sends the light of corresponding color.

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